drivers/net/ethernet/ibm/ibmvnic.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /**************************************************************************/
   3 /*                                                                        */
   4 /*  IBM System i and System p Virtual NIC Device Driver                   */
   5 /*  Copyright (C) 2014 IBM Corp.                                          */
   6 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   7 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   8 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   9 /*                                                                        */
  10 /*                                                                        */
  11 /* This module contains the implementation of a virtual ethernet device   */
  12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  13 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  14 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  15 /*                                                                         */
  16 /* Messages are passed between the VNIC driver and the VNIC server using  */
  17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  18 /* issue and receive commands that initiate communication with the server */
  19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  20 /* are used by the driver to notify the server that a packet is           */
  21 /* ready for transmission or that a buffer has been added to receive a    */
  22 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  23 /* driver that a packet transmission has been completed or that a packet  */
  24 /* has been received and placed in a waiting buffer.                      */
  25 /*                                                                        */
  26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  27 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  28 /* or receive has been completed, the VNIC driver is required to use      */
  29 /* "long term mapping". This entails that large, continuous DMA mapped    */
  30 /* buffers are allocated on driver initialization and these buffers are   */
  31 /* then continuously reused to pass skbs to and from the VNIC server.     */
  32 /*                                                                        */
  33 /**************************************************************************/
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/types.h>
  38 #include <linux/errno.h>
  39 #include <linux/completion.h>
  40 #include <linux/ioport.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kernel.h>
  43 #include <linux/netdevice.h>
  44 #include <linux/etherdevice.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/init.h>
  47 #include <linux/delay.h>
  48 #include <linux/mm.h>
  49 #include <linux/ethtool.h>
  50 #include <linux/proc_fs.h>
  51 #include <linux/if_arp.h>
  52 #include <linux/in.h>
  53 #include <linux/ip.h>
  54 #include <linux/ipv6.h>
  55 #include <linux/irq.h>
  56 #include <linux/kthread.h>
  57 #include <linux/seq_file.h>
  58 #include <linux/interrupt.h>
  59 #include <net/net_namespace.h>
  60 #include <asm/hvcall.h>
  61 #include <linux/atomic.h>
  62 #include <asm/vio.h>
  63 #include <asm/iommu.h>
  64 #include <linux/uaccess.h>
  65 #include <asm/firmware.h>
  66 #include <linux/workqueue.h>
  67 #include <linux/if_vlan.h>
  68 #include <linux/utsname.h>
  69
  70 #include "ibmvnic.h"
  71
  72 static const char ibmvnic_driver_name[] = "ibmvnic";
  73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  74
  75 MODULE_AUTHOR("Santiago Leon");
  76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  77 MODULE_LICENSE("GPL");
  78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  79
  80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  81 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
  82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
  88 static int enable_scrq_irq(struct ibmvnic_adapter *,
  89                            struct ibmvnic_sub_crq_queue *);
  90 static int disable_scrq_irq(struct ibmvnic_adapter *,
  91                             struct ibmvnic_sub_crq_queue *);
  92 static int pending_scrq(struct ibmvnic_adapter *,
  93                         struct ibmvnic_sub_crq_queue *);
  94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
  95                                         struct ibmvnic_sub_crq_queue *);
  96 static int ibmvnic_poll(struct napi_struct *napi, int data);
  97 static void send_query_map(struct ibmvnic_adapter *adapter);
  98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8);
  99 static int send_request_unmap(struct ibmvnic_adapter *, u8);
 100 static int send_login(struct ibmvnic_adapter *adapter);
 101 static void send_query_cap(struct ibmvnic_adapter *adapter);
 102 static int init_sub_crqs(struct ibmvnic_adapter *);
 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
 105 static void release_crq_queue(struct ibmvnic_adapter *);
 106 static int __ibmvnic_set_mac(struct net_device *, u8 *);
 107 static int init_crq_queue(struct ibmvnic_adapter *adapter);
 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
 110                                          struct ibmvnic_sub_crq_queue *tx_scrq);
 111
 112 struct ibmvnic_stat {
 113         char name[ETH_GSTRING_LEN];
 114         int offset;
 115 };
 116
 117 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 118                              offsetof(struct ibmvnic_statistics, stat))
 119 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
 120
 121 static const struct ibmvnic_stat ibmvnic_stats[] = {
 122         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 123         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 124         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 125         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 126         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 127         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 128         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 129         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 130         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 131         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 132         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 133         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 134         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 135         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 136         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 137         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 138         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 139         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 140         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 141         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 142         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 143         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 144 };
 145
 146 static int send_crq_init_complete(struct ibmvnic_adapter *adapter)
 147 {
 148         union ibmvnic_crq crq;
 149
 150         memset(&crq, 0, sizeof(crq));
 151         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
 152         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
 153
 154         return ibmvnic_send_crq(adapter, &crq);
 155 }
 156
 157 static int send_version_xchg(struct ibmvnic_adapter *adapter)
 158 {
 159         union ibmvnic_crq crq;
 160
 161         memset(&crq, 0, sizeof(crq));
 162         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
 163         crq.version_exchange.cmd = VERSION_EXCHANGE;
 164         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
 165
 166         return ibmvnic_send_crq(adapter, &crq);
 167 }
 168
 169 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 170                           unsigned long length, unsigned long *number,
 171                           unsigned long *irq)
 172 {
 173         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 174         long rc;
 175
 176         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 177         *number = retbuf[0];
 178         *irq = retbuf[1];
 179
 180         return rc;
 181 }
 182
 183 /**
 184  * ibmvnic_wait_for_completion - Check device state and wait for completion
 185  * @adapter: private device data
 186  * @comp_done: completion structure to wait for
 187  * @timeout: time to wait in milliseconds
 188  *
 189  * Wait for a completion signal or until the timeout limit is reached
 190  * while checking that the device is still active.
 191  */
 192 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
 193                                        struct completion *comp_done,
 194                                        unsigned long timeout)
 195 {
 196         struct net_device *netdev;
 197         unsigned long div_timeout;
 198         u8 retry;
 199
 200         netdev = adapter->netdev;
 201         retry = 5;
 202         div_timeout = msecs_to_jiffies(timeout / retry);
 203         while (true) {
 204                 if (!adapter->crq.active) {
 205                         netdev_err(netdev, "Device down!\n");
 206                         return -ENODEV;
 207                 }
 208                 if (!retry--)
 209                         break;
 210                 if (wait_for_completion_timeout(comp_done, div_timeout))
 211                         return 0;
 212         }
 213         netdev_err(netdev, "Operation timed out.\n");
 214         return -ETIMEDOUT;
 215 }
 216
 217 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 218                                 struct ibmvnic_long_term_buff *ltb, int size)
 219 {
 220         struct device *dev = &adapter->vdev->dev;
 221         int rc;
 222
 223         ltb->size = size;
 224         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 225                                        GFP_KERNEL);
 226
 227         if (!ltb->buff) {
 228                 dev_err(dev, "Couldn't alloc long term buffer\n");
 229                 return -ENOMEM;
 230         }
 231         ltb->map_id = adapter->map_id;
 232         adapter->map_id++;
 233
 234         mutex_lock(&adapter->fw_lock);
 235         adapter->fw_done_rc = 0;
 236         reinit_completion(&adapter->fw_done);
 237
 238         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 239         if (rc) {
 240                 dev_err(dev, "send_request_map failed, rc = %d\n", rc);
 241                 goto out;
 242         }
 243
 244         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 245         if (rc) {
 246                 dev_err(dev,
 247                         "Long term map request aborted or timed out,rc = %d\n",
 248                         rc);
 249                 goto out;
 250         }
 251
 252         if (adapter->fw_done_rc) {
 253                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 254                         adapter->fw_done_rc);
 255                 rc = -1;
 256                 goto out;
 257         }
 258         rc = 0;
 259 out:
 260         if (rc) {
 261                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 262                 ltb->buff = NULL;
 263         }
 264         mutex_unlock(&adapter->fw_lock);
 265         return rc;
 266 }
 267
 268 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 269                                 struct ibmvnic_long_term_buff *ltb)
 270 {
 271         struct device *dev = &adapter->vdev->dev;
 272
 273         if (!ltb->buff)
 274                 return;
 275
 276         /* VIOS automatically unmaps the long term buffer at remote
 277          * end for the following resets:
 278          * FAILOVER, MOBILITY, TIMEOUT.
 279          */
 280         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 281             adapter->reset_reason != VNIC_RESET_MOBILITY &&
 282             adapter->reset_reason != VNIC_RESET_TIMEOUT)
 283                 send_request_unmap(adapter, ltb->map_id);
 284         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 285         ltb->buff = NULL;
 286         ltb->map_id = 0;
 287 }
 288
 289 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 290                                 struct ibmvnic_long_term_buff *ltb)
 291 {
 292         struct device *dev = &adapter->vdev->dev;
 293         int rc;
 294
 295         memset(ltb->buff, 0, ltb->size);
 296
 297         mutex_lock(&adapter->fw_lock);
 298         adapter->fw_done_rc = 0;
 299
 300         reinit_completion(&adapter->fw_done);
 301         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 302         if (rc) {
 303                 mutex_unlock(&adapter->fw_lock);
 304                 return rc;
 305         }
 306
 307         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 308         if (rc) {
 309                 dev_info(dev,
 310                          "Reset failed, long term map request timed out or aborted\n");
 311                 mutex_unlock(&adapter->fw_lock);
 312                 return rc;
 313         }
 314
 315         if (adapter->fw_done_rc) {
 316                 dev_info(dev,
 317                          "Reset failed, attempting to free and reallocate buffer\n");
 318                 free_long_term_buff(adapter, ltb);
 319                 mutex_unlock(&adapter->fw_lock);
 320                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 321         }
 322         mutex_unlock(&adapter->fw_lock);
 323         return 0;
 324 }
 325
 326 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 327 {
 328         int i;
 329
 330         for (i = 0; i < adapter->num_active_rx_pools; i++)
 331                 adapter->rx_pool[i].active = 0;
 332 }
 333
 334 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 335                               struct ibmvnic_rx_pool *pool)
 336 {
 337         int count = pool->size - atomic_read(&pool->available);
 338         u64 handle = adapter->rx_scrq[pool->index]->handle;
 339         struct device *dev = &adapter->vdev->dev;
 340         struct ibmvnic_ind_xmit_queue *ind_bufp;
 341         struct ibmvnic_sub_crq_queue *rx_scrq;
 342         union sub_crq *sub_crq;
 343         int buffers_added = 0;
 344         unsigned long lpar_rc;
 345         struct sk_buff *skb;
 346         unsigned int offset;
 347         dma_addr_t dma_addr;
 348         unsigned char *dst;
 349         int shift = 0;
 350         int index;
 351         int i;
 352
 353         if (!pool->active)
 354                 return;
 355
 356         rx_scrq = adapter->rx_scrq[pool->index];
 357         ind_bufp = &rx_scrq->ind_buf;
 358
 359         /* netdev_skb_alloc() could have failed after we saved a few skbs
 360          * in the indir_buf and we would not have sent them to VIOS yet.
 361          * To account for them, start the loop at ind_bufp->index rather
 362          * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will
 363          * be 0.
 364          */
 365         for (i = ind_bufp->index; i < count; ++i) {
 366                 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
 367                 if (!skb) {
 368                         dev_err(dev, "Couldn't replenish rx buff\n");
 369                         adapter->replenish_no_mem++;
 370                         break;
 371                 }
 372
 373                 index = pool->free_map[pool->next_free];
 374
 375                 if (pool->rx_buff[index].skb)
 376                         dev_err(dev, "Inconsistent free_map!\n");
 377
 378                 /* Copy the skb to the long term mapped DMA buffer */
 379                 offset = index * pool->buff_size;
 380                 dst = pool->long_term_buff.buff + offset;
 381                 memset(dst, 0, pool->buff_size);
 382                 dma_addr = pool->long_term_buff.addr + offset;
 383                 pool->rx_buff[index].data = dst;
 384
 385                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 386                 pool->rx_buff[index].dma = dma_addr;
 387                 pool->rx_buff[index].skb = skb;
 388                 pool->rx_buff[index].pool_index = pool->index;
 389                 pool->rx_buff[index].size = pool->buff_size;
 390
 391                 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
 392                 memset(sub_crq, 0, sizeof(*sub_crq));
 393                 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
 394                 sub_crq->rx_add.correlator =
 395                     cpu_to_be64((u64)&pool->rx_buff[index]);
 396                 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
 397                 sub_crq->rx_add.map_id = pool->long_term_buff.map_id;
 398
 399                 /* The length field of the sCRQ is defined to be 24 bits so the
 400                  * buffer size needs to be left shifted by a byte before it is
 401                  * converted to big endian to prevent the last byte from being
 402                  * truncated.
 403                  */
 404 #ifdef __LITTLE_ENDIAN__
 405                 shift = 8;
 406 #endif
 407                 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
 408                 pool->next_free = (pool->next_free + 1) % pool->size;
 409                 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
 410                     i == count - 1) {
 411                         lpar_rc =
 412                                 send_subcrq_indirect(adapter, handle,
 413                                                      (u64)ind_bufp->indir_dma,
 414                                                      (u64)ind_bufp->index);
 415                         if (lpar_rc != H_SUCCESS)
 416                                 goto failure;
 417                         buffers_added += ind_bufp->index;
 418                         adapter->replenish_add_buff_success += ind_bufp->index;
 419                         ind_bufp->index = 0;
 420                 }
 421         }
 422         atomic_add(buffers_added, &pool->available);
 423         return;
 424
 425 failure:
 426         if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
 427                 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
 428         for (i = ind_bufp->index - 1; i >= 0; --i) {
 429                 struct ibmvnic_rx_buff *rx_buff;
 430
 431                 pool->next_free = pool->next_free == 0 ?
 432                                   pool->size - 1 : pool->next_free - 1;
 433                 sub_crq = &ind_bufp->indir_arr[i];
 434                 rx_buff = (struct ibmvnic_rx_buff *)
 435                                 be64_to_cpu(sub_crq->rx_add.correlator);
 436                 index = (int)(rx_buff - pool->rx_buff);
 437                 pool->free_map[pool->next_free] = index;
 438                 dev_kfree_skb_any(pool->rx_buff[index].skb);
 439                 pool->rx_buff[index].skb = NULL;
 440         }
 441         adapter->replenish_add_buff_failure += ind_bufp->index;
 442         atomic_add(buffers_added, &pool->available);
 443         ind_bufp->index = 0;
 444         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 445                 /* Disable buffer pool replenishment and report carrier off if
 446                  * queue is closed or pending failover.
 447                  * Firmware guarantees that a signal will be sent to the
 448                  * driver, triggering a reset.
 449                  */
 450                 deactivate_rx_pools(adapter);
 451                 netif_carrier_off(adapter->netdev);
 452         }
 453 }
 454
 455 static void replenish_pools(struct ibmvnic_adapter *adapter)
 456 {
 457         int i;
 458
 459         adapter->replenish_task_cycles++;
 460         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 461                 if (adapter->rx_pool[i].active)
 462                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 463         }
 464
 465         netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
 466 }
 467
 468 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 469 {
 470         kfree(adapter->tx_stats_buffers);
 471         kfree(adapter->rx_stats_buffers);
 472         adapter->tx_stats_buffers = NULL;
 473         adapter->rx_stats_buffers = NULL;
 474 }
 475
 476 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 477 {
 478         adapter->tx_stats_buffers =
 479                                 kcalloc(IBMVNIC_MAX_QUEUES,
 480                                         sizeof(struct ibmvnic_tx_queue_stats),
 481                                         GFP_KERNEL);
 482         if (!adapter->tx_stats_buffers)
 483                 return -ENOMEM;
 484
 485         adapter->rx_stats_buffers =
 486                                 kcalloc(IBMVNIC_MAX_QUEUES,
 487                                         sizeof(struct ibmvnic_rx_queue_stats),
 488                                         GFP_KERNEL);
 489         if (!adapter->rx_stats_buffers)
 490                 return -ENOMEM;
 491
 492         return 0;
 493 }
 494
 495 static void release_stats_token(struct ibmvnic_adapter *adapter)
 496 {
 497         struct device *dev = &adapter->vdev->dev;
 498
 499         if (!adapter->stats_token)
 500                 return;
 501
 502         dma_unmap_single(dev, adapter->stats_token,
 503                          sizeof(struct ibmvnic_statistics),
 504                          DMA_FROM_DEVICE);
 505         adapter->stats_token = 0;
 506 }
 507
 508 static int init_stats_token(struct ibmvnic_adapter *adapter)
 509 {
 510         struct device *dev = &adapter->vdev->dev;
 511         dma_addr_t stok;
 512
 513         stok = dma_map_single(dev, &adapter->stats,
 514                               sizeof(struct ibmvnic_statistics),
 515                               DMA_FROM_DEVICE);
 516         if (dma_mapping_error(dev, stok)) {
 517                 dev_err(dev, "Couldn't map stats buffer\n");
 518                 return -1;
 519         }
 520
 521         adapter->stats_token = stok;
 522         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 523         return 0;
 524 }
 525
 526 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 527 {
 528         struct ibmvnic_rx_pool *rx_pool;
 529         u64 buff_size;
 530         int rx_scrqs;
 531         int i, j, rc;
 532
 533         if (!adapter->rx_pool)
 534                 return -1;
 535
 536         buff_size = adapter->cur_rx_buf_sz;
 537         rx_scrqs = adapter->num_active_rx_pools;
 538         for (i = 0; i < rx_scrqs; i++) {
 539                 rx_pool = &adapter->rx_pool[i];
 540
 541                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 542
 543                 if (rx_pool->buff_size != buff_size) {
 544                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 545                         rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
 546                         rc = alloc_long_term_buff(adapter,
 547                                                   &rx_pool->long_term_buff,
 548                                                   rx_pool->size *
 549                                                   rx_pool->buff_size);
 550                 } else {
 551                         rc = reset_long_term_buff(adapter,
 552                                                   &rx_pool->long_term_buff);
 553                 }
 554
 555                 if (rc)
 556                         return rc;
 557
 558                 for (j = 0; j < rx_pool->size; j++)
 559                         rx_pool->free_map[j] = j;
 560
 561                 memset(rx_pool->rx_buff, 0,
 562                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 563
 564                 atomic_set(&rx_pool->available, 0);
 565                 rx_pool->next_alloc = 0;
 566                 rx_pool->next_free = 0;
 567                 rx_pool->active = 1;
 568         }
 569
 570         return 0;
 571 }
 572
 573 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 574 {
 575         struct ibmvnic_rx_pool *rx_pool;
 576         int i, j;
 577
 578         if (!adapter->rx_pool)
 579                 return;
 580
 581         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 582                 rx_pool = &adapter->rx_pool[i];
 583
 584                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 585
 586                 kfree(rx_pool->free_map);
 587                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 588
 589                 if (!rx_pool->rx_buff)
 590                         continue;
 591
 592                 for (j = 0; j < rx_pool->size; j++) {
 593                         if (rx_pool->rx_buff[j].skb) {
 594                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
 595                                 rx_pool->rx_buff[j].skb = NULL;
 596                         }
 597                 }
 598
 599                 kfree(rx_pool->rx_buff);
 600         }
 601
 602         kfree(adapter->rx_pool);
 603         adapter->rx_pool = NULL;
 604         adapter->num_active_rx_pools = 0;
 605 }
 606
 607 static int init_rx_pools(struct net_device *netdev)
 608 {
 609         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 610         struct device *dev = &adapter->vdev->dev;
 611         struct ibmvnic_rx_pool *rx_pool;
 612         int rxadd_subcrqs;
 613         u64 buff_size;
 614         int i, j;
 615
 616         rxadd_subcrqs = adapter->num_active_rx_scrqs;
 617         buff_size = adapter->cur_rx_buf_sz;
 618
 619         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 620                                    sizeof(struct ibmvnic_rx_pool),
 621                                    GFP_KERNEL);
 622         if (!adapter->rx_pool) {
 623                 dev_err(dev, "Failed to allocate rx pools\n");
 624                 return -1;
 625         }
 626
 627         adapter->num_active_rx_pools = rxadd_subcrqs;
 628
 629         for (i = 0; i < rxadd_subcrqs; i++) {
 630                 rx_pool = &adapter->rx_pool[i];
 631
 632                 netdev_dbg(adapter->netdev,
 633                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 634                            i, adapter->req_rx_add_entries_per_subcrq,
 635                            buff_size);
 636
 637                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 638                 rx_pool->index = i;
 639                 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
 640                 rx_pool->active = 1;
 641
 642                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 643                                             GFP_KERNEL);
 644                 if (!rx_pool->free_map) {
 645                         release_rx_pools(adapter);
 646                         return -1;
 647                 }
 648
 649                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 650                                            sizeof(struct ibmvnic_rx_buff),
 651                                            GFP_KERNEL);
 652                 if (!rx_pool->rx_buff) {
 653                         dev_err(dev, "Couldn't alloc rx buffers\n");
 654                         release_rx_pools(adapter);
 655                         return -1;
 656                 }
 657
 658                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 659                                          rx_pool->size * rx_pool->buff_size)) {
 660                         release_rx_pools(adapter);
 661                         return -1;
 662                 }
 663
 664                 for (j = 0; j < rx_pool->size; ++j)
 665                         rx_pool->free_map[j] = j;
 666
 667                 atomic_set(&rx_pool->available, 0);
 668                 rx_pool->next_alloc = 0;
 669                 rx_pool->next_free = 0;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 676                              struct ibmvnic_tx_pool *tx_pool)
 677 {
 678         int rc, i;
 679
 680         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 681         if (rc)
 682                 return rc;
 683
 684         memset(tx_pool->tx_buff, 0,
 685                tx_pool->num_buffers *
 686                sizeof(struct ibmvnic_tx_buff));
 687
 688         for (i = 0; i < tx_pool->num_buffers; i++)
 689                 tx_pool->free_map[i] = i;
 690
 691         tx_pool->consumer_index = 0;
 692         tx_pool->producer_index = 0;
 693
 694         return 0;
 695 }
 696
 697 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 698 {
 699         int tx_scrqs;
 700         int i, rc;
 701
 702         if (!adapter->tx_pool)
 703                 return -1;
 704
 705         tx_scrqs = adapter->num_active_tx_pools;
 706         for (i = 0; i < tx_scrqs; i++) {
 707                 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
 708                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 709                 if (rc)
 710                         return rc;
 711                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 712                 if (rc)
 713                         return rc;
 714         }
 715
 716         return 0;
 717 }
 718
 719 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 720 {
 721         if (!adapter->vpd)
 722                 return;
 723
 724         kfree(adapter->vpd->buff);
 725         kfree(adapter->vpd);
 726
 727         adapter->vpd = NULL;
 728 }
 729
 730 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 731                                 struct ibmvnic_tx_pool *tx_pool)
 732 {
 733         kfree(tx_pool->tx_buff);
 734         kfree(tx_pool->free_map);
 735         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 736 }
 737
 738 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 739 {
 740         int i;
 741
 742         if (!adapter->tx_pool)
 743                 return;
 744
 745         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 746                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 747                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 748         }
 749
 750         kfree(adapter->tx_pool);
 751         adapter->tx_pool = NULL;
 752         kfree(adapter->tso_pool);
 753         adapter->tso_pool = NULL;
 754         adapter->num_active_tx_pools = 0;
 755 }
 756
 757 static int init_one_tx_pool(struct net_device *netdev,
 758                             struct ibmvnic_tx_pool *tx_pool,
 759                             int num_entries, int buf_size)
 760 {
 761         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 762         int i;
 763
 764         tx_pool->tx_buff = kcalloc(num_entries,
 765                                    sizeof(struct ibmvnic_tx_buff),
 766                                    GFP_KERNEL);
 767         if (!tx_pool->tx_buff)
 768                 return -1;
 769
 770         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 771                                  num_entries * buf_size))
 772                 return -1;
 773
 774         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 775         if (!tx_pool->free_map)
 776                 return -1;
 777
 778         for (i = 0; i < num_entries; i++)
 779                 tx_pool->free_map[i] = i;
 780
 781         tx_pool->consumer_index = 0;
 782         tx_pool->producer_index = 0;
 783         tx_pool->num_buffers = num_entries;
 784         tx_pool->buf_size = buf_size;
 785
 786         return 0;
 787 }
 788
 789 static int init_tx_pools(struct net_device *netdev)
 790 {
 791         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 792         int tx_subcrqs;
 793         u64 buff_size;
 794         int i, rc;
 795
 796         tx_subcrqs = adapter->num_active_tx_scrqs;
 797         adapter->tx_pool = kcalloc(tx_subcrqs,
 798                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 799         if (!adapter->tx_pool)
 800                 return -1;
 801
 802         adapter->tso_pool = kcalloc(tx_subcrqs,
 803                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 804         if (!adapter->tso_pool) {
 805                 kfree(adapter->tx_pool);
 806                 adapter->tx_pool = NULL;
 807                 return -1;
 808         }
 809
 810         adapter->num_active_tx_pools = tx_subcrqs;
 811
 812         for (i = 0; i < tx_subcrqs; i++) {
 813                 buff_size = adapter->req_mtu + VLAN_HLEN;
 814                 buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
 815                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 816                                       adapter->req_tx_entries_per_subcrq,
 817                                       buff_size);
 818                 if (rc) {
 819                         release_tx_pools(adapter);
 820                         return rc;
 821                 }
 822
 823                 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
 824                                       IBMVNIC_TSO_BUFS,
 825                                       IBMVNIC_TSO_BUF_SZ);
 826                 if (rc) {
 827                         release_tx_pools(adapter);
 828                         return rc;
 829                 }
 830         }
 831
 832         return 0;
 833 }
 834
 835 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 836 {
 837         int i;
 838
 839         if (adapter->napi_enabled)
 840                 return;
 841
 842         for (i = 0; i < adapter->req_rx_queues; i++)
 843                 napi_enable(&adapter->napi[i]);
 844
 845         adapter->napi_enabled = true;
 846 }
 847
 848 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 849 {
 850         int i;
 851
 852         if (!adapter->napi_enabled)
 853                 return;
 854
 855         for (i = 0; i < adapter->req_rx_queues; i++) {
 856                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 857                 napi_disable(&adapter->napi[i]);
 858         }
 859
 860         adapter->napi_enabled = false;
 861 }
 862
 863 static int init_napi(struct ibmvnic_adapter *adapter)
 864 {
 865         int i;
 866
 867         adapter->napi = kcalloc(adapter->req_rx_queues,
 868                                 sizeof(struct napi_struct), GFP_KERNEL);
 869         if (!adapter->napi)
 870                 return -ENOMEM;
 871
 872         for (i = 0; i < adapter->req_rx_queues; i++) {
 873                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 874                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 875                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 876         }
 877
 878         adapter->num_active_rx_napi = adapter->req_rx_queues;
 879         return 0;
 880 }
 881
 882 static void release_napi(struct ibmvnic_adapter *adapter)
 883 {
 884         int i;
 885
 886         if (!adapter->napi)
 887                 return;
 888
 889         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 890                 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
 891                 netif_napi_del(&adapter->napi[i]);
 892         }
 893
 894         kfree(adapter->napi);
 895         adapter->napi = NULL;
 896         adapter->num_active_rx_napi = 0;
 897         adapter->napi_enabled = false;
 898 }
 899
 900 static const char *adapter_state_to_string(enum vnic_state state)
 901 {
 902         switch (state) {
 903         case VNIC_PROBING:
 904                 return "PROBING";
 905         case VNIC_PROBED:
 906                 return "PROBED";
 907         case VNIC_OPENING:
 908                 return "OPENING";
 909         case VNIC_OPEN:
 910                 return "OPEN";
 911         case VNIC_CLOSING:
 912                 return "CLOSING";
 913         case VNIC_CLOSED:
 914                 return "CLOSED";
 915         case VNIC_REMOVING:
 916                 return "REMOVING";
 917         case VNIC_REMOVED:
 918                 return "REMOVED";
 919         case VNIC_DOWN:
 920                 return "DOWN";
 921         }
 922         return "UNKNOWN";
 923 }
 924
 925 static int ibmvnic_login(struct net_device *netdev)
 926 {
 927         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 928         unsigned long timeout = msecs_to_jiffies(20000);
 929         int retry_count = 0;
 930         int retries = 10;
 931         bool retry;
 932         int rc;
 933
 934         do {
 935                 retry = false;
 936                 if (retry_count > retries) {
 937                         netdev_warn(netdev, "Login attempts exceeded\n");
 938                         return -1;
 939                 }
 940
 941                 adapter->init_done_rc = 0;
 942                 reinit_completion(&adapter->init_done);
 943                 rc = send_login(adapter);
 944                 if (rc)
 945                         return rc;
 946
 947                 if (!wait_for_completion_timeout(&adapter->init_done,
 948                                                  timeout)) {
 949                         netdev_warn(netdev, "Login timed out, retrying...\n");
 950                         retry = true;
 951                         adapter->init_done_rc = 0;
 952                         retry_count++;
 953                         continue;
 954                 }
 955
 956                 if (adapter->init_done_rc == ABORTED) {
 957                         netdev_warn(netdev, "Login aborted, retrying...\n");
 958                         retry = true;
 959                         adapter->init_done_rc = 0;
 960                         retry_count++;
 961                         /* FW or device may be busy, so
 962                          * wait a bit before retrying login
 963                          */
 964                         msleep(500);
 965                 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
 966                         retry_count++;
 967                         release_sub_crqs(adapter, 1);
 968
 969                         retry = true;
 970                         netdev_dbg(netdev,
 971                                    "Received partial success, retrying...\n");
 972                         adapter->init_done_rc = 0;
 973                         reinit_completion(&adapter->init_done);
 974                         send_query_cap(adapter);
 975                         if (!wait_for_completion_timeout(&adapter->init_done,
 976                                                          timeout)) {
 977                                 netdev_warn(netdev,
 978                                             "Capabilities query timed out\n");
 979                                 return -1;
 980                         }
 981
 982                         rc = init_sub_crqs(adapter);
 983                         if (rc) {
 984                                 netdev_warn(netdev,
 985                                             "SCRQ initialization failed\n");
 986                                 return -1;
 987                         }
 988
 989                         rc = init_sub_crq_irqs(adapter);
 990                         if (rc) {
 991                                 netdev_warn(netdev,
 992                                             "SCRQ irq initialization failed\n");
 993                                 return -1;
 994                         }
 995                 } else if (adapter->init_done_rc) {
 996                         netdev_warn(netdev, "Adapter login failed\n");
 997                         return -1;
 998                 }
 999         } while (retry);
1000
1001         __ibmvnic_set_mac(netdev, adapter->mac_addr);
1002
1003         netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state));
1004         return 0;
1005 }
1006
1007 static void release_login_buffer(struct ibmvnic_adapter *adapter)
1008 {
1009         kfree(adapter->login_buf);
1010         adapter->login_buf = NULL;
1011 }
1012
1013 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
1014 {
1015         kfree(adapter->login_rsp_buf);
1016         adapter->login_rsp_buf = NULL;
1017 }
1018
1019 static void release_resources(struct ibmvnic_adapter *adapter)
1020 {
1021         release_vpd_data(adapter);
1022
1023         release_tx_pools(adapter);
1024         release_rx_pools(adapter);
1025
1026         release_napi(adapter);
1027         release_login_buffer(adapter);
1028         release_login_rsp_buffer(adapter);
1029 }
1030
1031 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
1032 {
1033         struct net_device *netdev = adapter->netdev;
1034         unsigned long timeout = msecs_to_jiffies(20000);
1035         union ibmvnic_crq crq;
1036         bool resend;
1037         int rc;
1038
1039         netdev_dbg(netdev, "setting link state %d\n", link_state);
1040
1041         memset(&crq, 0, sizeof(crq));
1042         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
1043         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
1044         crq.logical_link_state.link_state = link_state;
1045
1046         do {
1047                 resend = false;
1048
1049                 reinit_completion(&adapter->init_done);
1050                 rc = ibmvnic_send_crq(adapter, &crq);
1051                 if (rc) {
1052                         netdev_err(netdev, "Failed to set link state\n");
1053                         return rc;
1054                 }
1055
1056                 if (!wait_for_completion_timeout(&adapter->init_done,
1057                                                  timeout)) {
1058                         netdev_err(netdev, "timeout setting link state\n");
1059                         return -1;
1060                 }
1061
1062                 if (adapter->init_done_rc == PARTIALSUCCESS) {
1063                         /* Partuial success, delay and re-send */
1064                         mdelay(1000);
1065                         resend = true;
1066                 } else if (adapter->init_done_rc) {
1067                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
1068                                     adapter->init_done_rc);
1069                         return adapter->init_done_rc;
1070                 }
1071         } while (resend);
1072
1073         return 0;
1074 }
1075
1076 static int set_real_num_queues(struct net_device *netdev)
1077 {
1078         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1079         int rc;
1080
1081         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1082                    adapter->req_tx_queues, adapter->req_rx_queues);
1083
1084         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1085         if (rc) {
1086                 netdev_err(netdev, "failed to set the number of tx queues\n");
1087                 return rc;
1088         }
1089
1090         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1091         if (rc)
1092                 netdev_err(netdev, "failed to set the number of rx queues\n");
1093
1094         return rc;
1095 }
1096
1097 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1098 {
1099         struct device *dev = &adapter->vdev->dev;
1100         union ibmvnic_crq crq;
1101         int len = 0;
1102         int rc;
1103
1104         if (adapter->vpd->buff)
1105                 len = adapter->vpd->len;
1106
1107         mutex_lock(&adapter->fw_lock);
1108         adapter->fw_done_rc = 0;
1109         reinit_completion(&adapter->fw_done);
1110
1111         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1112         crq.get_vpd_size.cmd = GET_VPD_SIZE;
1113         rc = ibmvnic_send_crq(adapter, &crq);
1114         if (rc) {
1115                 mutex_unlock(&adapter->fw_lock);
1116                 return rc;
1117         }
1118
1119         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1120         if (rc) {
1121                 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1122                 mutex_unlock(&adapter->fw_lock);
1123                 return rc;
1124         }
1125         mutex_unlock(&adapter->fw_lock);
1126
1127         if (!adapter->vpd->len)
1128                 return -ENODATA;
1129
1130         if (!adapter->vpd->buff)
1131                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1132         else if (adapter->vpd->len != len)
1133                 adapter->vpd->buff =
1134                         krealloc(adapter->vpd->buff,
1135                                  adapter->vpd->len, GFP_KERNEL);
1136
1137         if (!adapter->vpd->buff) {
1138                 dev_err(dev, "Could allocate VPD buffer\n");
1139                 return -ENOMEM;
1140         }
1141
1142         adapter->vpd->dma_addr =
1143                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1144                                DMA_FROM_DEVICE);
1145         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1146                 dev_err(dev, "Could not map VPD buffer\n");
1147                 kfree(adapter->vpd->buff);
1148                 adapter->vpd->buff = NULL;
1149                 return -ENOMEM;
1150         }
1151
1152         mutex_lock(&adapter->fw_lock);
1153         adapter->fw_done_rc = 0;
1154         reinit_completion(&adapter->fw_done);
1155
1156         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1157         crq.get_vpd.cmd = GET_VPD;
1158         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1159         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1160         rc = ibmvnic_send_crq(adapter, &crq);
1161         if (rc) {
1162                 kfree(adapter->vpd->buff);
1163                 adapter->vpd->buff = NULL;
1164                 mutex_unlock(&adapter->fw_lock);
1165                 return rc;
1166         }
1167
1168         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1169         if (rc) {
1170                 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1171                 kfree(adapter->vpd->buff);
1172                 adapter->vpd->buff = NULL;
1173                 mutex_unlock(&adapter->fw_lock);
1174                 return rc;
1175         }
1176
1177         mutex_unlock(&adapter->fw_lock);
1178         return 0;
1179 }
1180
1181 static int init_resources(struct ibmvnic_adapter *adapter)
1182 {
1183         struct net_device *netdev = adapter->netdev;
1184         int rc;
1185
1186         rc = set_real_num_queues(netdev);
1187         if (rc)
1188                 return rc;
1189
1190         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1191         if (!adapter->vpd)
1192                 return -ENOMEM;
1193
1194         /* Vital Product Data (VPD) */
1195         rc = ibmvnic_get_vpd(adapter);
1196         if (rc) {
1197                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1198                 return rc;
1199         }
1200
1201         adapter->map_id = 1;
1202
1203         rc = init_napi(adapter);
1204         if (rc)
1205                 return rc;
1206
1207         send_query_map(adapter);
1208
1209         rc = init_rx_pools(netdev);
1210         if (rc)
1211                 return rc;
1212
1213         rc = init_tx_pools(netdev);
1214         return rc;
1215 }
1216
1217 static int __ibmvnic_open(struct net_device *netdev)
1218 {
1219         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1220         enum vnic_state prev_state = adapter->state;
1221         int i, rc;
1222
1223         adapter->state = VNIC_OPENING;
1224         replenish_pools(adapter);
1225         ibmvnic_napi_enable(adapter);
1226
1227         /* We're ready to receive frames, enable the sub-crq interrupts and
1228          * set the logical link state to up
1229          */
1230         for (i = 0; i < adapter->req_rx_queues; i++) {
1231                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1232                 if (prev_state == VNIC_CLOSED)
1233                         enable_irq(adapter->rx_scrq[i]->irq);
1234                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1235         }
1236
1237         for (i = 0; i < adapter->req_tx_queues; i++) {
1238                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1239                 if (prev_state == VNIC_CLOSED)
1240                         enable_irq(adapter->tx_scrq[i]->irq);
1241                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1242                 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
1243         }
1244
1245         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1246         if (rc) {
1247                 ibmvnic_napi_disable(adapter);
1248                 release_resources(adapter);
1249                 return rc;
1250         }
1251
1252         netif_tx_start_all_queues(netdev);
1253
1254         if (prev_state == VNIC_CLOSED) {
1255                 for (i = 0; i < adapter->req_rx_queues; i++)
1256                         napi_schedule(&adapter->napi[i]);
1257         }
1258
1259         adapter->state = VNIC_OPEN;
1260         return rc;
1261 }
1262
1263 static int ibmvnic_open(struct net_device *netdev)
1264 {
1265         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1266         int rc;
1267
1268         ASSERT_RTNL();
1269
1270         /* If device failover is pending or we are about to reset, just set
1271          * device state and return. Device operation will be handled by reset
1272          * routine.
1273          *
1274          * It should be safe to overwrite the adapter->state here. Since
1275          * we hold the rtnl, either the reset has not actually started or
1276          * the rtnl got dropped during the set_link_state() in do_reset().
1277          * In the former case, no one else is changing the state (again we
1278          * have the rtnl) and in the latter case, do_reset() will detect and
1279          * honor our setting below.
1280          */
1281         if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) {
1282                 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n",
1283                            adapter_state_to_string(adapter->state),
1284                            adapter->failover_pending);
1285                 adapter->state = VNIC_OPEN;
1286                 rc = 0;
1287                 goto out;
1288         }
1289
1290         if (adapter->state != VNIC_CLOSED) {
1291                 rc = ibmvnic_login(netdev);
1292                 if (rc)
1293                         goto out;
1294
1295                 rc = init_resources(adapter);
1296                 if (rc) {
1297                         netdev_err(netdev, "failed to initialize resources\n");
1298                         release_resources(adapter);
1299                         goto out;
1300                 }
1301         }
1302
1303         rc = __ibmvnic_open(netdev);
1304
1305 out:
1306         /* If open failed and there is a pending failover or in-progress reset,
1307          * set device state and return. Device operation will be handled by
1308          * reset routine. See also comments above regarding rtnl.
1309          */
1310         if (rc &&
1311             (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) {
1312                 adapter->state = VNIC_OPEN;
1313                 rc = 0;
1314         }
1315         return rc;
1316 }
1317
1318 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1319 {
1320         struct ibmvnic_rx_pool *rx_pool;
1321         struct ibmvnic_rx_buff *rx_buff;
1322         u64 rx_entries;
1323         int rx_scrqs;
1324         int i, j;
1325
1326         if (!adapter->rx_pool)
1327                 return;
1328
1329         rx_scrqs = adapter->num_active_rx_pools;
1330         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1331
1332         /* Free any remaining skbs in the rx buffer pools */
1333         for (i = 0; i < rx_scrqs; i++) {
1334                 rx_pool = &adapter->rx_pool[i];
1335                 if (!rx_pool || !rx_pool->rx_buff)
1336                         continue;
1337
1338                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1339                 for (j = 0; j < rx_entries; j++) {
1340                         rx_buff = &rx_pool->rx_buff[j];
1341                         if (rx_buff && rx_buff->skb) {
1342                                 dev_kfree_skb_any(rx_buff->skb);
1343                                 rx_buff->skb = NULL;
1344                         }
1345                 }
1346         }
1347 }
1348
1349 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1350                               struct ibmvnic_tx_pool *tx_pool)
1351 {
1352         struct ibmvnic_tx_buff *tx_buff;
1353         u64 tx_entries;
1354         int i;
1355
1356         if (!tx_pool || !tx_pool->tx_buff)
1357                 return;
1358
1359         tx_entries = tx_pool->num_buffers;
1360
1361         for (i = 0; i < tx_entries; i++) {
1362                 tx_buff = &tx_pool->tx_buff[i];
1363                 if (tx_buff && tx_buff->skb) {
1364                         dev_kfree_skb_any(tx_buff->skb);
1365                         tx_buff->skb = NULL;
1366                 }
1367         }
1368 }
1369
1370 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1371 {
1372         int tx_scrqs;
1373         int i;
1374
1375         if (!adapter->tx_pool || !adapter->tso_pool)
1376                 return;
1377
1378         tx_scrqs = adapter->num_active_tx_pools;
1379
1380         /* Free any remaining skbs in the tx buffer pools */
1381         for (i = 0; i < tx_scrqs; i++) {
1382                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1383                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1384                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1385         }
1386 }
1387
1388 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1389 {
1390         struct net_device *netdev = adapter->netdev;
1391         int i;
1392
1393         if (adapter->tx_scrq) {
1394                 for (i = 0; i < adapter->req_tx_queues; i++)
1395                         if (adapter->tx_scrq[i]->irq) {
1396                                 netdev_dbg(netdev,
1397                                            "Disabling tx_scrq[%d] irq\n", i);
1398                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1399                                 disable_irq(adapter->tx_scrq[i]->irq);
1400                         }
1401         }
1402
1403         if (adapter->rx_scrq) {
1404                 for (i = 0; i < adapter->req_rx_queues; i++) {
1405                         if (adapter->rx_scrq[i]->irq) {
1406                                 netdev_dbg(netdev,
1407                                            "Disabling rx_scrq[%d] irq\n", i);
1408                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1409                                 disable_irq(adapter->rx_scrq[i]->irq);
1410                         }
1411                 }
1412         }
1413 }
1414
1415 static void ibmvnic_cleanup(struct net_device *netdev)
1416 {
1417         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1418
1419         /* ensure that transmissions are stopped if called by do_reset */
1420         if (test_bit(0, &adapter->resetting))
1421                 netif_tx_disable(netdev);
1422         else
1423                 netif_tx_stop_all_queues(netdev);
1424
1425         ibmvnic_napi_disable(adapter);
1426         ibmvnic_disable_irqs(adapter);
1427
1428         clean_rx_pools(adapter);
1429         clean_tx_pools(adapter);
1430 }
1431
1432 static int __ibmvnic_close(struct net_device *netdev)
1433 {
1434         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1435         int rc = 0;
1436
1437         adapter->state = VNIC_CLOSING;
1438         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1439         adapter->state = VNIC_CLOSED;
1440         return rc;
1441 }
1442
1443 static int ibmvnic_close(struct net_device *netdev)
1444 {
1445         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1446         int rc;
1447
1448         netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n",
1449                    adapter_state_to_string(adapter->state),
1450                    adapter->failover_pending,
1451                    adapter->force_reset_recovery);
1452
1453         /* If device failover is pending, just set device state and return.
1454          * Device operation will be handled by reset routine.
1455          */
1456         if (adapter->failover_pending) {
1457                 adapter->state = VNIC_CLOSED;
1458                 return 0;
1459         }
1460
1461         rc = __ibmvnic_close(netdev);
1462         ibmvnic_cleanup(netdev);
1463
1464         return rc;
1465 }
1466
1467 /**
1468  * build_hdr_data - creates L2/L3/L4 header data buffer
1469  * @hdr_field: bitfield determining needed headers
1470  * @skb: socket buffer
1471  * @hdr_len: array of header lengths
1472  * @hdr_data: buffer to write the header to
1473  *
1474  * Reads hdr_field to determine which headers are needed by firmware.
1475  * Builds a buffer containing these headers.  Saves individual header
1476  * lengths and total buffer length to be used to build descriptors.
1477  */
1478 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1479                           int *hdr_len, u8 *hdr_data)
1480 {
1481         int len = 0;
1482         u8 *hdr;
1483
1484         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1485                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1486         else
1487                 hdr_len[0] = sizeof(struct ethhdr);
1488
1489         if (skb->protocol == htons(ETH_P_IP)) {
1490                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1491                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1492                         hdr_len[2] = tcp_hdrlen(skb);
1493                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1494                         hdr_len[2] = sizeof(struct udphdr);
1495         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1496                 hdr_len[1] = sizeof(struct ipv6hdr);
1497                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1498                         hdr_len[2] = tcp_hdrlen(skb);
1499                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1500                         hdr_len[2] = sizeof(struct udphdr);
1501         } else if (skb->protocol == htons(ETH_P_ARP)) {
1502                 hdr_len[1] = arp_hdr_len(skb->dev);
1503                 hdr_len[2] = 0;
1504         }
1505
1506         memset(hdr_data, 0, 120);
1507         if ((hdr_field >> 6) & 1) {
1508                 hdr = skb_mac_header(skb);
1509                 memcpy(hdr_data, hdr, hdr_len[0]);
1510                 len += hdr_len[0];
1511         }
1512
1513         if ((hdr_field >> 5) & 1) {
1514                 hdr = skb_network_header(skb);
1515                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1516                 len += hdr_len[1];
1517         }
1518
1519         if ((hdr_field >> 4) & 1) {
1520                 hdr = skb_transport_header(skb);
1521                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1522                 len += hdr_len[2];
1523         }
1524         return len;
1525 }
1526
1527 /**
1528  * create_hdr_descs - create header and header extension descriptors
1529  * @hdr_field: bitfield determining needed headers
1530  * @hdr_data: buffer containing header data
1531  * @len: length of data buffer
1532  * @hdr_len: array of individual header lengths
1533  * @scrq_arr: descriptor array
1534  *
1535  * Creates header and, if needed, header extension descriptors and
1536  * places them in a descriptor array, scrq_arr
1537  */
1538
1539 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1540                             union sub_crq *scrq_arr)
1541 {
1542         union sub_crq hdr_desc;
1543         int tmp_len = len;
1544         int num_descs = 0;
1545         u8 *data, *cur;
1546         int tmp;
1547
1548         while (tmp_len > 0) {
1549                 cur = hdr_data + len - tmp_len;
1550
1551                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1552                 if (cur != hdr_data) {
1553                         data = hdr_desc.hdr_ext.data;
1554                         tmp = tmp_len > 29 ? 29 : tmp_len;
1555                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1556                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1557                         hdr_desc.hdr_ext.len = tmp;
1558                 } else {
1559                         data = hdr_desc.hdr.data;
1560                         tmp = tmp_len > 24 ? 24 : tmp_len;
1561                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1562                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1563                         hdr_desc.hdr.len = tmp;
1564                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1565                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1566                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1567                         hdr_desc.hdr.flag = hdr_field << 1;
1568                 }
1569                 memcpy(data, cur, tmp);
1570                 tmp_len -= tmp;
1571                 *scrq_arr = hdr_desc;
1572                 scrq_arr++;
1573                 num_descs++;
1574         }
1575
1576         return num_descs;
1577 }
1578
1579 /**
1580  * build_hdr_descs_arr - build a header descriptor array
1581  * @skb: tx socket buffer
1582  * @indir_arr: indirect array
1583  * @num_entries: number of descriptors to be sent
1584  * @hdr_field: bit field determining which headers will be sent
1585  *
1586  * This function will build a TX descriptor array with applicable
1587  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1588  */
1589
1590 static void build_hdr_descs_arr(struct sk_buff *skb,
1591                                 union sub_crq *indir_arr,
1592                                 int *num_entries, u8 hdr_field)
1593 {
1594         int hdr_len[3] = {0, 0, 0};
1595         u8 hdr_data[140] = {0};
1596         int tot_len;
1597
1598         tot_len = build_hdr_data(hdr_field, skb, hdr_len,
1599                                  hdr_data);
1600         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1601                                          indir_arr + 1);
1602 }
1603
1604 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1605                                     struct net_device *netdev)
1606 {
1607         /* For some backing devices, mishandling of small packets
1608          * can result in a loss of connection or TX stall. Device
1609          * architects recommend that no packet should be smaller
1610          * than the minimum MTU value provided to the driver, so
1611          * pad any packets to that length
1612          */
1613         if (skb->len < netdev->min_mtu)
1614                 return skb_put_padto(skb, netdev->min_mtu);
1615
1616         return 0;
1617 }
1618
1619 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
1620                                          struct ibmvnic_sub_crq_queue *tx_scrq)
1621 {
1622         struct ibmvnic_ind_xmit_queue *ind_bufp;
1623         struct ibmvnic_tx_buff *tx_buff;
1624         struct ibmvnic_tx_pool *tx_pool;
1625         union sub_crq tx_scrq_entry;
1626         int queue_num;
1627         int entries;
1628         int index;
1629         int i;
1630
1631         ind_bufp = &tx_scrq->ind_buf;
1632         entries = (u64)ind_bufp->index;
1633         queue_num = tx_scrq->pool_index;
1634
1635         for (i = entries - 1; i >= 0; --i) {
1636                 tx_scrq_entry = ind_bufp->indir_arr[i];
1637                 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
1638                         continue;
1639                 index = be32_to_cpu(tx_scrq_entry.v1.correlator);
1640                 if (index & IBMVNIC_TSO_POOL_MASK) {
1641                         tx_pool = &adapter->tso_pool[queue_num];
1642                         index &= ~IBMVNIC_TSO_POOL_MASK;
1643                 } else {
1644                         tx_pool = &adapter->tx_pool[queue_num];
1645                 }
1646                 tx_pool->free_map[tx_pool->consumer_index] = index;
1647                 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1648                                           tx_pool->num_buffers - 1 :
1649                                           tx_pool->consumer_index - 1;
1650                 tx_buff = &tx_pool->tx_buff[index];
1651                 adapter->netdev->stats.tx_packets--;
1652                 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
1653                 adapter->tx_stats_buffers[queue_num].packets--;
1654                 adapter->tx_stats_buffers[queue_num].bytes -=
1655                                                 tx_buff->skb->len;
1656                 dev_kfree_skb_any(tx_buff->skb);
1657                 tx_buff->skb = NULL;
1658                 adapter->netdev->stats.tx_dropped++;
1659         }
1660         ind_bufp->index = 0;
1661         if (atomic_sub_return(entries, &tx_scrq->used) <=
1662             (adapter->req_tx_entries_per_subcrq / 2) &&
1663             __netif_subqueue_stopped(adapter->netdev, queue_num) &&
1664             !test_bit(0, &adapter->resetting)) {
1665                 netif_wake_subqueue(adapter->netdev, queue_num);
1666                 netdev_dbg(adapter->netdev, "Started queue %d\n",
1667                            queue_num);
1668         }
1669 }
1670
1671 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
1672                                  struct ibmvnic_sub_crq_queue *tx_scrq)
1673 {
1674         struct ibmvnic_ind_xmit_queue *ind_bufp;
1675         u64 dma_addr;
1676         u64 entries;
1677         u64 handle;
1678         int rc;
1679
1680         ind_bufp = &tx_scrq->ind_buf;
1681         dma_addr = (u64)ind_bufp->indir_dma;
1682         entries = (u64)ind_bufp->index;
1683         handle = tx_scrq->handle;
1684
1685         if (!entries)
1686                 return 0;
1687         rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
1688         if (rc)
1689                 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
1690         else
1691                 ind_bufp->index = 0;
1692         return 0;
1693 }
1694
1695 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1696 {
1697         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1698         int queue_num = skb_get_queue_mapping(skb);
1699         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1700         struct device *dev = &adapter->vdev->dev;
1701         struct ibmvnic_ind_xmit_queue *ind_bufp;
1702         struct ibmvnic_tx_buff *tx_buff = NULL;
1703         struct ibmvnic_sub_crq_queue *tx_scrq;
1704         struct ibmvnic_tx_pool *tx_pool;
1705         unsigned int tx_send_failed = 0;
1706         netdev_tx_t ret = NETDEV_TX_OK;
1707         unsigned int tx_map_failed = 0;
1708         union sub_crq indir_arr[16];
1709         unsigned int tx_dropped = 0;
1710         unsigned int tx_packets = 0;
1711         unsigned int tx_bytes = 0;
1712         dma_addr_t data_dma_addr;
1713         struct netdev_queue *txq;
1714         unsigned long lpar_rc;
1715         union sub_crq tx_crq;
1716         unsigned int offset;
1717         int num_entries = 1;
1718         unsigned char *dst;
1719         int index = 0;
1720         u8 proto = 0;
1721
1722         tx_scrq = adapter->tx_scrq[queue_num];
1723         txq = netdev_get_tx_queue(netdev, queue_num);
1724         ind_bufp = &tx_scrq->ind_buf;
1725
1726         if (test_bit(0, &adapter->resetting)) {
1727                 if (!netif_subqueue_stopped(netdev, skb))
1728                         netif_stop_subqueue(netdev, queue_num);
1729                 dev_kfree_skb_any(skb);
1730
1731                 tx_send_failed++;
1732                 tx_dropped++;
1733                 ret = NETDEV_TX_OK;
1734                 goto out;
1735         }
1736
1737         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1738                 tx_dropped++;
1739                 tx_send_failed++;
1740                 ret = NETDEV_TX_OK;
1741                 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1742                 goto out;
1743         }
1744         if (skb_is_gso(skb))
1745                 tx_pool = &adapter->tso_pool[queue_num];
1746         else
1747                 tx_pool = &adapter->tx_pool[queue_num];
1748
1749         index = tx_pool->free_map[tx_pool->consumer_index];
1750
1751         if (index == IBMVNIC_INVALID_MAP) {
1752                 dev_kfree_skb_any(skb);
1753                 tx_send_failed++;
1754                 tx_dropped++;
1755                 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1756                 ret = NETDEV_TX_OK;
1757                 goto out;
1758         }
1759
1760         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1761
1762         offset = index * tx_pool->buf_size;
1763         dst = tx_pool->long_term_buff.buff + offset;
1764         memset(dst, 0, tx_pool->buf_size);
1765         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1766
1767         if (skb_shinfo(skb)->nr_frags) {
1768                 int cur, i;
1769
1770                 /* Copy the head */
1771                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1772                 cur = skb_headlen(skb);
1773
1774                 /* Copy the frags */
1775                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1776                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1777
1778                         memcpy(dst + cur, skb_frag_address(frag),
1779                                skb_frag_size(frag));
1780                         cur += skb_frag_size(frag);
1781                 }
1782         } else {
1783                 skb_copy_from_linear_data(skb, dst, skb->len);
1784         }
1785
1786         /* post changes to long_term_buff *dst before VIOS accessing it */
1787         dma_wmb();
1788
1789         tx_pool->consumer_index =
1790             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1791
1792         tx_buff = &tx_pool->tx_buff[index];
1793         tx_buff->skb = skb;
1794         tx_buff->index = index;
1795         tx_buff->pool_index = queue_num;
1796
1797         memset(&tx_crq, 0, sizeof(tx_crq));
1798         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1799         tx_crq.v1.type = IBMVNIC_TX_DESC;
1800         tx_crq.v1.n_crq_elem = 1;
1801         tx_crq.v1.n_sge = 1;
1802         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1803
1804         if (skb_is_gso(skb))
1805                 tx_crq.v1.correlator =
1806                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1807         else
1808                 tx_crq.v1.correlator = cpu_to_be32(index);
1809         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1810         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1811         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1812
1813         if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1814                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1815                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1816         }
1817
1818         if (skb->protocol == htons(ETH_P_IP)) {
1819                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1820                 proto = ip_hdr(skb)->protocol;
1821         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1822                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1823                 proto = ipv6_hdr(skb)->nexthdr;
1824         }
1825
1826         if (proto == IPPROTO_TCP)
1827                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1828         else if (proto == IPPROTO_UDP)
1829                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1830
1831         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1832                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1833                 hdrs += 2;
1834         }
1835         if (skb_is_gso(skb)) {
1836                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1837                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1838                 hdrs += 2;
1839         }
1840
1841         if ((*hdrs >> 7) & 1)
1842                 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
1843
1844         tx_crq.v1.n_crq_elem = num_entries;
1845         tx_buff->num_entries = num_entries;
1846         /* flush buffer if current entry can not fit */
1847         if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
1848                 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1849                 if (lpar_rc != H_SUCCESS)
1850                         goto tx_flush_err;
1851         }
1852
1853         indir_arr[0] = tx_crq;
1854         memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
1855                num_entries * sizeof(struct ibmvnic_generic_scrq));
1856         ind_bufp->index += num_entries;
1857         if (__netdev_tx_sent_queue(txq, skb->len,
1858                                    netdev_xmit_more() &&
1859                                    ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
1860                 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1861                 if (lpar_rc != H_SUCCESS)
1862                         goto tx_err;
1863         }
1864
1865         if (atomic_add_return(num_entries, &tx_scrq->used)
1866                                         >= adapter->req_tx_entries_per_subcrq) {
1867                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1868                 netif_stop_subqueue(netdev, queue_num);
1869         }
1870
1871         tx_packets++;
1872         tx_bytes += skb->len;
1873         txq->trans_start = jiffies;
1874         ret = NETDEV_TX_OK;
1875         goto out;
1876
1877 tx_flush_err:
1878         dev_kfree_skb_any(skb);
1879         tx_buff->skb = NULL;
1880         tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1881                                   tx_pool->num_buffers - 1 :
1882                                   tx_pool->consumer_index - 1;
1883         tx_dropped++;
1884 tx_err:
1885         if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1886                 dev_err_ratelimited(dev, "tx: send failed\n");
1887
1888         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1889                 /* Disable TX and report carrier off if queue is closed
1890                  * or pending failover.
1891                  * Firmware guarantees that a signal will be sent to the
1892                  * driver, triggering a reset or some other action.
1893                  */
1894                 netif_tx_stop_all_queues(netdev);
1895                 netif_carrier_off(netdev);
1896         }
1897 out:
1898         netdev->stats.tx_dropped += tx_dropped;
1899         netdev->stats.tx_bytes += tx_bytes;
1900         netdev->stats.tx_packets += tx_packets;
1901         adapter->tx_send_failed += tx_send_failed;
1902         adapter->tx_map_failed += tx_map_failed;
1903         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1904         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1905         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1906
1907         return ret;
1908 }
1909
1910 static void ibmvnic_set_multi(struct net_device *netdev)
1911 {
1912         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1913         struct netdev_hw_addr *ha;
1914         union ibmvnic_crq crq;
1915
1916         memset(&crq, 0, sizeof(crq));
1917         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1918         crq.request_capability.cmd = REQUEST_CAPABILITY;
1919
1920         if (netdev->flags & IFF_PROMISC) {
1921                 if (!adapter->promisc_supported)
1922                         return;
1923         } else {
1924                 if (netdev->flags & IFF_ALLMULTI) {
1925                         /* Accept all multicast */
1926                         memset(&crq, 0, sizeof(crq));
1927                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1928                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1929                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1930                         ibmvnic_send_crq(adapter, &crq);
1931                 } else if (netdev_mc_empty(netdev)) {
1932                         /* Reject all multicast */
1933                         memset(&crq, 0, sizeof(crq));
1934                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1935                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1936                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1937                         ibmvnic_send_crq(adapter, &crq);
1938                 } else {
1939                         /* Accept one or more multicast(s) */
1940                         netdev_for_each_mc_addr(ha, netdev) {
1941                                 memset(&crq, 0, sizeof(crq));
1942                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1943                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1944                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1945                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1946                                                 ha->addr);
1947                                 ibmvnic_send_crq(adapter, &crq);
1948                         }
1949                 }
1950         }
1951 }
1952
1953 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1954 {
1955         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1956         union ibmvnic_crq crq;
1957         int rc;
1958
1959         if (!is_valid_ether_addr(dev_addr)) {
1960                 rc = -EADDRNOTAVAIL;
1961                 goto err;
1962         }
1963
1964         memset(&crq, 0, sizeof(crq));
1965         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1966         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1967         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1968
1969         mutex_lock(&adapter->fw_lock);
1970         adapter->fw_done_rc = 0;
1971         reinit_completion(&adapter->fw_done);
1972
1973         rc = ibmvnic_send_crq(adapter, &crq);
1974         if (rc) {
1975                 rc = -EIO;
1976                 mutex_unlock(&adapter->fw_lock);
1977                 goto err;
1978         }
1979
1980         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1981         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1982         if (rc || adapter->fw_done_rc) {
1983                 rc = -EIO;
1984                 mutex_unlock(&adapter->fw_lock);
1985                 goto err;
1986         }
1987         mutex_unlock(&adapter->fw_lock);
1988         return 0;
1989 err:
1990         ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1991         return rc;
1992 }
1993
1994 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1995 {
1996         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1997         struct sockaddr *addr = p;
1998         int rc;
1999
2000         rc = 0;
2001         if (!is_valid_ether_addr(addr->sa_data))
2002                 return -EADDRNOTAVAIL;
2003
2004         ether_addr_copy(adapter->mac_addr, addr->sa_data);
2005         if (adapter->state != VNIC_PROBED)
2006                 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
2007
2008         return rc;
2009 }
2010
2011 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
2012 {
2013         switch (reason) {
2014         case VNIC_RESET_FAILOVER:
2015                 return "FAILOVER";
2016         case VNIC_RESET_MOBILITY:
2017                 return "MOBILITY";
2018         case VNIC_RESET_FATAL:
2019                 return "FATAL";
2020         case VNIC_RESET_NON_FATAL:
2021                 return "NON_FATAL";
2022         case VNIC_RESET_TIMEOUT:
2023                 return "TIMEOUT";
2024         case VNIC_RESET_CHANGE_PARAM:
2025                 return "CHANGE_PARAM";
2026         case VNIC_RESET_PASSIVE_INIT:
2027                 return "PASSIVE_INIT";
2028         }
2029         return "UNKNOWN";
2030 }
2031
2032 /*
2033  * do_reset returns zero if we are able to keep processing reset events, or
2034  * non-zero if we hit a fatal error and must halt.
2035  */
2036 static int do_reset(struct ibmvnic_adapter *adapter,
2037                     struct ibmvnic_rwi *rwi, u32 reset_state)
2038 {
2039         u64 old_num_rx_queues, old_num_tx_queues;
2040         u64 old_num_rx_slots, old_num_tx_slots;
2041         struct net_device *netdev = adapter->netdev;
2042         int rc;
2043
2044         netdev_dbg(adapter->netdev,
2045                    "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n",
2046                    adapter_state_to_string(adapter->state),
2047                    adapter->failover_pending,
2048                    reset_reason_to_string(rwi->reset_reason),
2049                    adapter_state_to_string(reset_state));
2050
2051         adapter->reset_reason = rwi->reset_reason;
2052         /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
2053         if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2054                 rtnl_lock();
2055
2056         /* Now that we have the rtnl lock, clear any pending failover.
2057          * This will ensure ibmvnic_open() has either completed or will
2058          * block until failover is complete.
2059          */
2060         if (rwi->reset_reason == VNIC_RESET_FAILOVER)
2061                 adapter->failover_pending = false;
2062
2063         /* read the state and check (again) after getting rtnl */
2064         reset_state = adapter->state;
2065
2066         if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2067                 rc = -EBUSY;
2068                 goto out;
2069         }
2070
2071         netif_carrier_off(netdev);
2072
2073         old_num_rx_queues = adapter->req_rx_queues;
2074         old_num_tx_queues = adapter->req_tx_queues;
2075         old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
2076         old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
2077
2078         ibmvnic_cleanup(netdev);
2079
2080         if (reset_state == VNIC_OPEN &&
2081             adapter->reset_reason != VNIC_RESET_MOBILITY &&
2082             adapter->reset_reason != VNIC_RESET_FAILOVER) {
2083                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2084                         rc = __ibmvnic_close(netdev);
2085                         if (rc)
2086                                 goto out;
2087                 } else {
2088                         adapter->state = VNIC_CLOSING;
2089
2090                         /* Release the RTNL lock before link state change and
2091                          * re-acquire after the link state change to allow
2092                          * linkwatch_event to grab the RTNL lock and run during
2093                          * a reset.
2094                          */
2095                         rtnl_unlock();
2096                         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
2097                         rtnl_lock();
2098                         if (rc)
2099                                 goto out;
2100
2101                         if (adapter->state == VNIC_OPEN) {
2102                                 /* When we dropped rtnl, ibmvnic_open() got
2103                                  * it and noticed that we are resetting and
2104                                  * set the adapter state to OPEN. Update our
2105                                  * new "target" state, and resume the reset
2106                                  * from VNIC_CLOSING state.
2107                                  */
2108                                 netdev_dbg(netdev,
2109                                            "Open changed state from %s, updating.\n",
2110                                            adapter_state_to_string(reset_state));
2111                                 reset_state = VNIC_OPEN;
2112                                 adapter->state = VNIC_CLOSING;
2113                         }
2114
2115                         if (adapter->state != VNIC_CLOSING) {
2116                                 /* If someone else changed the adapter state
2117                                  * when we dropped the rtnl, fail the reset
2118                                  */
2119                                 rc = -1;
2120                                 goto out;
2121                         }
2122                         adapter->state = VNIC_CLOSED;
2123                 }
2124         }
2125
2126         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2127                 release_resources(adapter);
2128                 release_sub_crqs(adapter, 1);
2129                 release_crq_queue(adapter);
2130         }
2131
2132         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2133                 /* remove the closed state so when we call open it appears
2134                  * we are coming from the probed state.
2135                  */
2136                 adapter->state = VNIC_PROBED;
2137
2138                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2139                         rc = init_crq_queue(adapter);
2140                 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
2141                         rc = ibmvnic_reenable_crq_queue(adapter);
2142                         release_sub_crqs(adapter, 1);
2143                 } else {
2144                         rc = ibmvnic_reset_crq(adapter);
2145                         if (rc == H_CLOSED || rc == H_SUCCESS) {
2146                                 rc = vio_enable_interrupts(adapter->vdev);
2147                                 if (rc)
2148                                         netdev_err(adapter->netdev,
2149                                                    "Reset failed to enable interrupts. rc=%d\n",
2150                                                    rc);
2151                         }
2152                 }
2153
2154                 if (rc) {
2155                         netdev_err(adapter->netdev,
2156                                    "Reset couldn't initialize crq. rc=%d\n", rc);
2157                         goto out;
2158                 }
2159
2160                 rc = ibmvnic_reset_init(adapter, true);
2161                 if (rc) {
2162                         rc = IBMVNIC_INIT_FAILED;
2163                         goto out;
2164                 }
2165
2166                 /* If the adapter was in PROBE or DOWN state prior to the reset,
2167                  * exit here.
2168                  */
2169                 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) {
2170                         rc = 0;
2171                         goto out;
2172                 }
2173
2174                 rc = ibmvnic_login(netdev);
2175                 if (rc)
2176                         goto out;
2177
2178                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2179                         rc = init_resources(adapter);
2180                         if (rc)
2181                                 goto out;
2182                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
2183                     adapter->req_tx_queues != old_num_tx_queues ||
2184                     adapter->req_rx_add_entries_per_subcrq !=
2185                     old_num_rx_slots ||
2186                     adapter->req_tx_entries_per_subcrq !=
2187                     old_num_tx_slots ||
2188                     !adapter->rx_pool ||
2189                     !adapter->tso_pool ||
2190                     !adapter->tx_pool) {
2191                         release_rx_pools(adapter);
2192                         release_tx_pools(adapter);
2193                         release_napi(adapter);
2194                         release_vpd_data(adapter);
2195
2196                         rc = init_resources(adapter);
2197                         if (rc)
2198                                 goto out;
2199
2200                 } else {
2201                         rc = reset_tx_pools(adapter);
2202                         if (rc) {
2203                                 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2204                                            rc);
2205                                 goto out;
2206                         }
2207
2208                         rc = reset_rx_pools(adapter);
2209                         if (rc) {
2210                                 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2211                                            rc);
2212                                 goto out;
2213                         }
2214                 }
2215                 ibmvnic_disable_irqs(adapter);
2216         }
2217         adapter->state = VNIC_CLOSED;
2218
2219         if (reset_state == VNIC_CLOSED) {
2220                 rc = 0;
2221                 goto out;
2222         }
2223
2224         rc = __ibmvnic_open(netdev);
2225         if (rc) {
2226                 rc = IBMVNIC_OPEN_FAILED;
2227                 goto out;
2228         }
2229
2230         /* refresh device's multicast list */
2231         ibmvnic_set_multi(netdev);
2232
2233         if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
2234             adapter->reset_reason == VNIC_RESET_MOBILITY)
2235                 __netdev_notify_peers(netdev);
2236
2237         rc = 0;
2238
2239 out:
2240         /* restore the adapter state if reset failed */
2241         if (rc)
2242                 adapter->state = reset_state;
2243         /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
2244         if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2245                 rtnl_unlock();
2246
2247         netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n",
2248                    adapter_state_to_string(adapter->state),
2249                    adapter->failover_pending, rc);
2250         return rc;
2251 }
2252
2253 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2254                          struct ibmvnic_rwi *rwi, u32 reset_state)
2255 {
2256         struct net_device *netdev = adapter->netdev;
2257         int rc;
2258
2259         netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n",
2260                    reset_reason_to_string(rwi->reset_reason));
2261
2262         /* read the state and check (again) after getting rtnl */
2263         reset_state = adapter->state;
2264
2265         if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2266                 rc = -EBUSY;
2267                 goto out;
2268         }
2269
2270         netif_carrier_off(netdev);
2271         adapter->reset_reason = rwi->reset_reason;
2272
2273         ibmvnic_cleanup(netdev);
2274         release_resources(adapter);
2275         release_sub_crqs(adapter, 0);
2276         release_crq_queue(adapter);
2277
2278         /* remove the closed state so when we call open it appears
2279          * we are coming from the probed state.
2280          */
2281         adapter->state = VNIC_PROBED;
2282
2283         reinit_completion(&adapter->init_done);
2284         rc = init_crq_queue(adapter);
2285         if (rc) {
2286                 netdev_err(adapter->netdev,
2287                            "Couldn't initialize crq. rc=%d\n", rc);
2288                 goto out;
2289         }
2290
2291         rc = ibmvnic_reset_init(adapter, false);
2292         if (rc)
2293                 goto out;
2294
2295         /* If the adapter was in PROBE or DOWN state prior to the reset,
2296          * exit here.
2297          */
2298         if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN)
2299                 goto out;
2300
2301         rc = ibmvnic_login(netdev);
2302         if (rc)
2303                 goto out;
2304
2305         rc = init_resources(adapter);
2306         if (rc)
2307                 goto out;
2308
2309         ibmvnic_disable_irqs(adapter);
2310         adapter->state = VNIC_CLOSED;
2311
2312         if (reset_state == VNIC_CLOSED)
2313                 goto out;
2314
2315         rc = __ibmvnic_open(netdev);
2316         if (rc) {
2317                 rc = IBMVNIC_OPEN_FAILED;
2318                 goto out;
2319         }
2320
2321         __netdev_notify_peers(netdev);
2322 out:
2323         /* restore adapter state if reset failed */
2324         if (rc)
2325                 adapter->state = reset_state;
2326         netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n",
2327                    adapter_state_to_string(adapter->state),
2328                    adapter->failover_pending, rc);
2329         return rc;
2330 }
2331
2332 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2333 {
2334         struct ibmvnic_rwi *rwi;
2335         unsigned long flags;
2336
2337         spin_lock_irqsave(&adapter->rwi_lock, flags);
2338
2339         if (!list_empty(&adapter->rwi_list)) {
2340                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2341                                        list);
2342                 list_del(&rwi->list);
2343         } else {
2344                 rwi = NULL;
2345         }
2346
2347         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2348         return rwi;
2349 }
2350
2351 /**
2352  * do_passive_init - complete probing when partner device is detected.
2353  * @adapter: ibmvnic_adapter struct
2354  *
2355  * If the ibmvnic device does not have a partner device to communicate with at boot
2356  * and that partner device comes online at a later time, this function is called
2357  * to complete the initialization process of ibmvnic device.
2358  * Caller is expected to hold rtnl_lock().
2359  *
2360  * Returns non-zero if sub-CRQs are not initialized properly leaving the device
2361  * in the down state.
2362  * Returns 0 upon success and the device is in PROBED state.
2363  */
2364
2365 static int do_passive_init(struct ibmvnic_adapter *adapter)
2366 {
2367         unsigned long timeout = msecs_to_jiffies(30000);
2368         struct net_device *netdev = adapter->netdev;
2369         struct device *dev = &adapter->vdev->dev;
2370         int rc;
2371
2372         netdev_dbg(netdev, "Partner device found, probing.\n");
2373
2374         adapter->state = VNIC_PROBING;
2375         reinit_completion(&adapter->init_done);
2376         adapter->init_done_rc = 0;
2377         adapter->crq.active = true;
2378
2379         rc = send_crq_init_complete(adapter);
2380         if (rc)
2381                 goto out;
2382
2383         rc = send_version_xchg(adapter);
2384         if (rc)
2385                 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc);
2386
2387         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2388                 dev_err(dev, "Initialization sequence timed out\n");
2389                 rc = -ETIMEDOUT;
2390                 goto out;
2391         }
2392
2393         rc = init_sub_crqs(adapter);
2394         if (rc) {
2395                 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc);
2396                 goto out;
2397         }
2398
2399         rc = init_sub_crq_irqs(adapter);
2400         if (rc) {
2401                 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc);
2402                 goto init_failed;
2403         }
2404
2405         netdev->mtu = adapter->req_mtu - ETH_HLEN;
2406         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2407         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2408
2409         adapter->state = VNIC_PROBED;
2410         netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n");
2411
2412         return 0;
2413
2414 init_failed:
2415         release_sub_crqs(adapter, 1);
2416 out:
2417         adapter->state = VNIC_DOWN;
2418         return rc;
2419 }
2420
2421 static void __ibmvnic_reset(struct work_struct *work)
2422 {
2423         struct ibmvnic_adapter *adapter;
2424         bool saved_state = false;
2425         struct ibmvnic_rwi *tmprwi;
2426         struct ibmvnic_rwi *rwi;
2427         unsigned long flags;
2428         u32 reset_state;
2429         int rc = 0;
2430
2431         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2432
2433         if (test_and_set_bit_lock(0, &adapter->resetting)) {
2434                 queue_delayed_work(system_long_wq,
2435                                    &adapter->ibmvnic_delayed_reset,
2436                                    IBMVNIC_RESET_DELAY);
2437                 return;
2438         }
2439
2440         rwi = get_next_rwi(adapter);
2441         while (rwi) {
2442                 spin_lock_irqsave(&adapter->state_lock, flags);
2443
2444                 if (adapter->state == VNIC_REMOVING ||
2445                     adapter->state == VNIC_REMOVED) {
2446                         spin_unlock_irqrestore(&adapter->state_lock, flags);
2447                         kfree(rwi);
2448                         rc = EBUSY;
2449                         break;
2450                 }
2451
2452                 if (!saved_state) {
2453                         reset_state = adapter->state;
2454                         saved_state = true;
2455                 }
2456                 spin_unlock_irqrestore(&adapter->state_lock, flags);
2457
2458                 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) {
2459                         rtnl_lock();
2460                         rc = do_passive_init(adapter);
2461                         rtnl_unlock();
2462                         if (!rc)
2463                                 netif_carrier_on(adapter->netdev);
2464                 } else if (adapter->force_reset_recovery) {
2465                         /* Since we are doing a hard reset now, clear the
2466                          * failover_pending flag so we don't ignore any
2467                          * future MOBILITY or other resets.
2468                          */
2469                         adapter->failover_pending = false;
2470
2471                         /* Transport event occurred during previous reset */
2472                         if (adapter->wait_for_reset) {
2473                                 /* Previous was CHANGE_PARAM; caller locked */
2474                                 adapter->force_reset_recovery = false;
2475                                 rc = do_hard_reset(adapter, rwi, reset_state);
2476                         } else {
2477                                 rtnl_lock();
2478                                 adapter->force_reset_recovery = false;
2479                                 rc = do_hard_reset(adapter, rwi, reset_state);
2480                                 rtnl_unlock();
2481                         }
2482                         if (rc) {
2483                                 /* give backing device time to settle down */
2484                                 netdev_dbg(adapter->netdev,
2485                                            "[S:%s] Hard reset failed, waiting 60 secs\n",
2486                                            adapter_state_to_string(adapter->state));
2487                                 set_current_state(TASK_UNINTERRUPTIBLE);
2488                                 schedule_timeout(60 * HZ);
2489                         }
2490                 } else {
2491                         rc = do_reset(adapter, rwi, reset_state);
2492                 }
2493                 tmprwi = rwi;
2494                 adapter->last_reset_time = jiffies;
2495
2496                 if (rc)
2497                         netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
2498
2499                 rwi = get_next_rwi(adapter);
2500
2501                 /*
2502                  * If there is another reset queued, free the previous rwi
2503                  * and process the new reset even if previous reset failed
2504                  * (the previous reset could have failed because of a fail
2505                  * over for instance, so process the fail over).
2506                  *
2507                  * If there are no resets queued and the previous reset failed,
2508                  * the adapter would be in an undefined state. So retry the
2509                  * previous reset as a hard reset.
2510                  */
2511                 if (rwi)
2512                         kfree(tmprwi);
2513                 else if (rc)
2514                         rwi = tmprwi;
2515
2516                 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2517                             rwi->reset_reason == VNIC_RESET_MOBILITY || rc))
2518                         adapter->force_reset_recovery = true;
2519         }
2520
2521         if (adapter->wait_for_reset) {
2522                 adapter->reset_done_rc = rc;
2523                 complete(&adapter->reset_done);
2524         }
2525
2526         clear_bit_unlock(0, &adapter->resetting);
2527
2528         netdev_dbg(adapter->netdev,
2529                    "[S:%s FRR:%d WFR:%d] Done processing resets\n",
2530                    adapter_state_to_string(adapter->state),
2531                    adapter->force_reset_recovery,
2532                    adapter->wait_for_reset);
2533 }
2534
2535 static void __ibmvnic_delayed_reset(struct work_struct *work)
2536 {
2537         struct ibmvnic_adapter *adapter;
2538
2539         adapter = container_of(work, struct ibmvnic_adapter,
2540                                ibmvnic_delayed_reset.work);
2541         __ibmvnic_reset(&adapter->ibmvnic_reset);
2542 }
2543
2544 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2545                          enum ibmvnic_reset_reason reason)
2546 {
2547         struct list_head *entry, *tmp_entry;
2548         struct ibmvnic_rwi *rwi, *tmp;
2549         struct net_device *netdev = adapter->netdev;
2550         unsigned long flags;
2551         int ret;
2552
2553         spin_lock_irqsave(&adapter->rwi_lock, flags);
2554
2555         /* If failover is pending don't schedule any other reset.
2556          * Instead let the failover complete. If there is already a
2557          * a failover reset scheduled, we will detect and drop the
2558          * duplicate reset when walking the ->rwi_list below.
2559          */
2560         if (adapter->state == VNIC_REMOVING ||
2561             adapter->state == VNIC_REMOVED ||
2562             (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
2563                 ret = EBUSY;
2564                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2565                 goto err;
2566         }
2567
2568         if (adapter->state == VNIC_PROBING) {
2569                 netdev_warn(netdev, "Adapter reset during probe\n");
2570                 adapter->init_done_rc = EAGAIN;
2571                 ret = EAGAIN;
2572                 goto err;
2573         }
2574
2575         list_for_each_entry(tmp, &adapter->rwi_list, list) {
2576                 if (tmp->reset_reason == reason) {
2577                         netdev_dbg(netdev, "Skipping matching reset, reason=%s\n",
2578                                    reset_reason_to_string(reason));
2579                         ret = EBUSY;
2580                         goto err;
2581                 }
2582         }
2583
2584         rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2585         if (!rwi) {
2586                 ret = ENOMEM;
2587                 goto err;
2588         }
2589         /* if we just received a transport event,
2590          * flush reset queue and process this reset
2591          */
2592         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2593                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2594                         list_del(entry);
2595         }
2596         rwi->reset_reason = reason;
2597         list_add_tail(&rwi->list, &adapter->rwi_list);
2598         netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n",
2599                    reset_reason_to_string(reason));
2600         queue_work(system_long_wq, &adapter->ibmvnic_reset);
2601
2602         ret = 0;
2603 err:
2604         /* ibmvnic_close() below can block, so drop the lock first */
2605         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2606
2607         if (ret == ENOMEM)
2608                 ibmvnic_close(netdev);
2609
2610         return -ret;
2611 }
2612
2613 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2614 {
2615         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2616
2617         if (test_bit(0, &adapter->resetting)) {
2618                 netdev_err(adapter->netdev,
2619                            "Adapter is resetting, skip timeout reset\n");
2620                 return;
2621         }
2622         /* No queuing up reset until at least 5 seconds (default watchdog val)
2623          * after last reset
2624          */
2625         if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
2626                 netdev_dbg(dev, "Not yet time to tx timeout.\n");
2627                 return;
2628         }
2629         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2630 }
2631
2632 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2633                                   struct ibmvnic_rx_buff *rx_buff)
2634 {
2635         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2636
2637         rx_buff->skb = NULL;
2638
2639         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2640         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2641
2642         atomic_dec(&pool->available);
2643 }
2644
2645 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2646 {
2647         struct ibmvnic_sub_crq_queue *rx_scrq;
2648         struct ibmvnic_adapter *adapter;
2649         struct net_device *netdev;
2650         int frames_processed;
2651         int scrq_num;
2652
2653         netdev = napi->dev;
2654         adapter = netdev_priv(netdev);
2655         scrq_num = (int)(napi - adapter->napi);
2656         frames_processed = 0;
2657         rx_scrq = adapter->rx_scrq[scrq_num];
2658
2659 restart_poll:
2660         while (frames_processed < budget) {
2661                 struct sk_buff *skb;
2662                 struct ibmvnic_rx_buff *rx_buff;
2663                 union sub_crq *next;
2664                 u32 length;
2665                 u16 offset;
2666                 u8 flags = 0;
2667
2668                 if (unlikely(test_bit(0, &adapter->resetting) &&
2669                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2670                         enable_scrq_irq(adapter, rx_scrq);
2671                         napi_complete_done(napi, frames_processed);
2672                         return frames_processed;
2673                 }
2674
2675                 if (!pending_scrq(adapter, rx_scrq))
2676                         break;
2677                 next = ibmvnic_next_scrq(adapter, rx_scrq);
2678                 rx_buff = (struct ibmvnic_rx_buff *)
2679                           be64_to_cpu(next->rx_comp.correlator);
2680                 /* do error checking */
2681                 if (next->rx_comp.rc) {
2682                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2683                                    be16_to_cpu(next->rx_comp.rc));
2684                         /* free the entry */
2685                         next->rx_comp.first = 0;
2686                         dev_kfree_skb_any(rx_buff->skb);
2687                         remove_buff_from_pool(adapter, rx_buff);
2688                         continue;
2689                 } else if (!rx_buff->skb) {
2690                         /* free the entry */
2691                         next->rx_comp.first = 0;
2692                         remove_buff_from_pool(adapter, rx_buff);
2693                         continue;
2694                 }
2695
2696                 length = be32_to_cpu(next->rx_comp.len);
2697                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2698                 flags = next->rx_comp.flags;
2699                 skb = rx_buff->skb;
2700                 /* load long_term_buff before copying to skb */
2701                 dma_rmb();
2702                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2703                                         length);
2704
2705                 /* VLAN Header has been stripped by the system firmware and
2706                  * needs to be inserted by the driver
2707                  */
2708                 if (adapter->rx_vlan_header_insertion &&
2709                     (flags & IBMVNIC_VLAN_STRIPPED))
2710                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2711                                                ntohs(next->rx_comp.vlan_tci));
2712
2713                 /* free the entry */
2714                 next->rx_comp.first = 0;
2715                 remove_buff_from_pool(adapter, rx_buff);
2716
2717                 skb_put(skb, length);
2718                 skb->protocol = eth_type_trans(skb, netdev);
2719                 skb_record_rx_queue(skb, scrq_num);
2720
2721                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2722                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2723                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2724                 }
2725
2726                 length = skb->len;
2727                 napi_gro_receive(napi, skb); /* send it up */
2728                 netdev->stats.rx_packets++;
2729                 netdev->stats.rx_bytes += length;
2730                 adapter->rx_stats_buffers[scrq_num].packets++;
2731                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2732                 frames_processed++;
2733         }
2734
2735         if (adapter->state != VNIC_CLOSING &&
2736             ((atomic_read(&adapter->rx_pool[scrq_num].available) <
2737               adapter->req_rx_add_entries_per_subcrq / 2) ||
2738               frames_processed < budget))
2739                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2740         if (frames_processed < budget) {
2741                 if (napi_complete_done(napi, frames_processed)) {
2742                         enable_scrq_irq(adapter, rx_scrq);
2743                         if (pending_scrq(adapter, rx_scrq)) {
2744                                 if (napi_reschedule(napi)) {
2745                                         disable_scrq_irq(adapter, rx_scrq);
2746                                         goto restart_poll;
2747                                 }
2748                         }
2749                 }
2750         }
2751         return frames_processed;
2752 }
2753
2754 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2755 {
2756         int rc, ret;
2757
2758         adapter->fallback.mtu = adapter->req_mtu;
2759         adapter->fallback.rx_queues = adapter->req_rx_queues;
2760         adapter->fallback.tx_queues = adapter->req_tx_queues;
2761         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2762         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2763
2764         reinit_completion(&adapter->reset_done);
2765         adapter->wait_for_reset = true;
2766         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2767
2768         if (rc) {
2769                 ret = rc;
2770                 goto out;
2771         }
2772         rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2773         if (rc) {
2774                 ret = -ENODEV;
2775                 goto out;
2776         }
2777
2778         ret = 0;
2779         if (adapter->reset_done_rc) {
2780                 ret = -EIO;
2781                 adapter->desired.mtu = adapter->fallback.mtu;
2782                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2783                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2784                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2785                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2786
2787                 reinit_completion(&adapter->reset_done);
2788                 adapter->wait_for_reset = true;
2789                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2790                 if (rc) {
2791                         ret = rc;
2792                         goto out;
2793                 }
2794                 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2795                                                  60000);
2796                 if (rc) {
2797                         ret = -ENODEV;
2798                         goto out;
2799                 }
2800         }
2801 out:
2802         adapter->wait_for_reset = false;
2803
2804         return ret;
2805 }
2806
2807 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2808 {
2809         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2810
2811         adapter->desired.mtu = new_mtu + ETH_HLEN;
2812
2813         return wait_for_reset(adapter);
2814 }
2815
2816 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2817                                                 struct net_device *dev,
2818                                                 netdev_features_t features)
2819 {
2820         /* Some backing hardware adapters can not
2821          * handle packets with a MSS less than 224
2822          * or with only one segment.
2823          */
2824         if (skb_is_gso(skb)) {
2825                 if (skb_shinfo(skb)->gso_size < 224 ||
2826                     skb_shinfo(skb)->gso_segs == 1)
2827                         features &= ~NETIF_F_GSO_MASK;
2828         }
2829
2830         return features;
2831 }
2832
2833 static const struct net_device_ops ibmvnic_netdev_ops = {
2834         .ndo_open               = ibmvnic_open,
2835         .ndo_stop               = ibmvnic_close,
2836         .ndo_start_xmit         = ibmvnic_xmit,
2837         .ndo_set_rx_mode        = ibmvnic_set_multi,
2838         .ndo_set_mac_address    = ibmvnic_set_mac,
2839         .ndo_validate_addr      = eth_validate_addr,
2840         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2841         .ndo_change_mtu         = ibmvnic_change_mtu,
2842         .ndo_features_check     = ibmvnic_features_check,
2843 };
2844
2845 /* ethtool functions */
2846
2847 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2848                                       struct ethtool_link_ksettings *cmd)
2849 {
2850         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2851         int rc;
2852
2853         rc = send_query_phys_parms(adapter);
2854         if (rc) {
2855                 adapter->speed = SPEED_UNKNOWN;
2856                 adapter->duplex = DUPLEX_UNKNOWN;
2857         }
2858         cmd->base.speed = adapter->speed;
2859         cmd->base.duplex = adapter->duplex;
2860         cmd->base.port = PORT_FIBRE;
2861         cmd->base.phy_address = 0;
2862         cmd->base.autoneg = AUTONEG_ENABLE;
2863
2864         return 0;
2865 }
2866
2867 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2868                                 struct ethtool_drvinfo *info)
2869 {
2870         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2871
2872         strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2873         strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2874         strscpy(info->fw_version, adapter->fw_version,
2875                 sizeof(info->fw_version));
2876 }
2877
2878 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2879 {
2880         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2881
2882         return adapter->msg_enable;
2883 }
2884
2885 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2886 {
2887         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2888
2889         adapter->msg_enable = data;
2890 }
2891
2892 static u32 ibmvnic_get_link(struct net_device *netdev)
2893 {
2894         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2895
2896         /* Don't need to send a query because we request a logical link up at
2897          * init and then we wait for link state indications
2898          */
2899         return adapter->logical_link_state;
2900 }
2901
2902 static void ibmvnic_get_ringparam(struct net_device *netdev,
2903                                   struct ethtool_ringparam *ring)
2904 {
2905         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2906
2907         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2908                 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2909                 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2910         } else {
2911                 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2912                 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2913         }
2914         ring->rx_mini_max_pending = 0;
2915         ring->rx_jumbo_max_pending = 0;
2916         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2917         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2918         ring->rx_mini_pending = 0;
2919         ring->rx_jumbo_pending = 0;
2920 }
2921
2922 static int ibmvnic_set_ringparam(struct net_device *netdev,
2923                                  struct ethtool_ringparam *ring)
2924 {
2925         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2926         int ret;
2927
2928         ret = 0;
2929         adapter->desired.rx_entries = ring->rx_pending;
2930         adapter->desired.tx_entries = ring->tx_pending;
2931
2932         ret = wait_for_reset(adapter);
2933
2934         if (!ret &&
2935             (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2936              adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2937                 netdev_info(netdev,
2938                             "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2939                             ring->rx_pending, ring->tx_pending,
2940                             adapter->req_rx_add_entries_per_subcrq,
2941                             adapter->req_tx_entries_per_subcrq);
2942         return ret;
2943 }
2944
2945 static void ibmvnic_get_channels(struct net_device *netdev,
2946                                  struct ethtool_channels *channels)
2947 {
2948         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2949
2950         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2951                 channels->max_rx = adapter->max_rx_queues;
2952                 channels->max_tx = adapter->max_tx_queues;
2953         } else {
2954                 channels->max_rx = IBMVNIC_MAX_QUEUES;
2955                 channels->max_tx = IBMVNIC_MAX_QUEUES;
2956         }
2957
2958         channels->max_other = 0;
2959         channels->max_combined = 0;
2960         channels->rx_count = adapter->req_rx_queues;
2961         channels->tx_count = adapter->req_tx_queues;
2962         channels->other_count = 0;
2963         channels->combined_count = 0;
2964 }
2965
2966 static int ibmvnic_set_channels(struct net_device *netdev,
2967                                 struct ethtool_channels *channels)
2968 {
2969         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2970         int ret;
2971
2972         ret = 0;
2973         adapter->desired.rx_queues = channels->rx_count;
2974         adapter->desired.tx_queues = channels->tx_count;
2975
2976         ret = wait_for_reset(adapter);
2977
2978         if (!ret &&
2979             (adapter->req_rx_queues != channels->rx_count ||
2980              adapter->req_tx_queues != channels->tx_count))
2981                 netdev_info(netdev,
2982                             "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2983                             channels->rx_count, channels->tx_count,
2984                             adapter->req_rx_queues, adapter->req_tx_queues);
2985         return ret;
2986 }
2987
2988 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2989 {
2990         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2991         int i;
2992
2993         switch (stringset) {
2994         case ETH_SS_STATS:
2995                 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2996                                 i++, data += ETH_GSTRING_LEN)
2997                         memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2998
2999                 for (i = 0; i < adapter->req_tx_queues; i++) {
3000                         snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
3001                         data += ETH_GSTRING_LEN;
3002
3003                         snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
3004                         data += ETH_GSTRING_LEN;
3005
3006                         snprintf(data, ETH_GSTRING_LEN,
3007                                  "tx%d_dropped_packets", i);
3008                         data += ETH_GSTRING_LEN;
3009                 }
3010
3011                 for (i = 0; i < adapter->req_rx_queues; i++) {
3012                         snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
3013                         data += ETH_GSTRING_LEN;
3014
3015                         snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
3016                         data += ETH_GSTRING_LEN;
3017
3018                         snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
3019                         data += ETH_GSTRING_LEN;
3020                 }
3021                 break;
3022
3023         case ETH_SS_PRIV_FLAGS:
3024                 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
3025                         strcpy(data + i * ETH_GSTRING_LEN,
3026                                ibmvnic_priv_flags[i]);
3027                 break;
3028         default:
3029                 return;
3030         }
3031 }
3032
3033 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
3034 {
3035         struct ibmvnic_adapter *adapter = netdev_priv(dev);
3036
3037         switch (sset) {
3038         case ETH_SS_STATS:
3039                 return ARRAY_SIZE(ibmvnic_stats) +
3040                        adapter->req_tx_queues * NUM_TX_STATS +
3041                        adapter->req_rx_queues * NUM_RX_STATS;
3042         case ETH_SS_PRIV_FLAGS:
3043                 return ARRAY_SIZE(ibmvnic_priv_flags);
3044         default:
3045                 return -EOPNOTSUPP;
3046         }
3047 }
3048
3049 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
3050                                       struct ethtool_stats *stats, u64 *data)
3051 {
3052         struct ibmvnic_adapter *adapter = netdev_priv(dev);
3053         union ibmvnic_crq crq;
3054         int i, j;
3055         int rc;
3056
3057         memset(&crq, 0, sizeof(crq));
3058         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
3059         crq.request_statistics.cmd = REQUEST_STATISTICS;
3060         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
3061         crq.request_statistics.len =
3062             cpu_to_be32(sizeof(struct ibmvnic_statistics));
3063
3064         /* Wait for data to be written */
3065         reinit_completion(&adapter->stats_done);
3066         rc = ibmvnic_send_crq(adapter, &crq);
3067         if (rc)
3068                 return;
3069         rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
3070         if (rc)
3071                 return;
3072
3073         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
3074                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT
3075                                       (adapter, ibmvnic_stats[i].offset));
3076
3077         for (j = 0; j < adapter->req_tx_queues; j++) {
3078                 data[i] = adapter->tx_stats_buffers[j].packets;
3079                 i++;
3080                 data[i] = adapter->tx_stats_buffers[j].bytes;
3081                 i++;
3082                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
3083                 i++;
3084         }
3085
3086         for (j = 0; j < adapter->req_rx_queues; j++) {
3087                 data[i] = adapter->rx_stats_buffers[j].packets;
3088                 i++;
3089                 data[i] = adapter->rx_stats_buffers[j].bytes;
3090                 i++;
3091                 data[i] = adapter->rx_stats_buffers[j].interrupts;
3092                 i++;
3093         }
3094 }
3095
3096 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
3097 {
3098         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3099
3100         return adapter->priv_flags;
3101 }
3102
3103 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
3104 {
3105         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3106         bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
3107
3108         if (which_maxes)
3109                 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
3110         else
3111                 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
3112
3113         return 0;
3114 }
3115
3116 static const struct ethtool_ops ibmvnic_ethtool_ops = {
3117         .get_drvinfo            = ibmvnic_get_drvinfo,
3118         .get_msglevel           = ibmvnic_get_msglevel,
3119         .set_msglevel           = ibmvnic_set_msglevel,
3120         .get_link               = ibmvnic_get_link,
3121         .get_ringparam          = ibmvnic_get_ringparam,
3122         .set_ringparam          = ibmvnic_set_ringparam,
3123         .get_channels           = ibmvnic_get_channels,
3124         .set_channels           = ibmvnic_set_channels,
3125         .get_strings            = ibmvnic_get_strings,
3126         .get_sset_count         = ibmvnic_get_sset_count,
3127         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
3128         .get_link_ksettings     = ibmvnic_get_link_ksettings,
3129         .get_priv_flags         = ibmvnic_get_priv_flags,
3130         .set_priv_flags         = ibmvnic_set_priv_flags,
3131 };
3132
3133 /* Routines for managing CRQs/sCRQs  */
3134
3135 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
3136                                    struct ibmvnic_sub_crq_queue *scrq)
3137 {
3138         int rc;
3139
3140         if (!scrq) {
3141                 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
3142                 return -EINVAL;
3143         }
3144
3145         if (scrq->irq) {
3146                 free_irq(scrq->irq, scrq);
3147                 irq_dispose_mapping(scrq->irq);
3148                 scrq->irq = 0;
3149         }
3150
3151         if (scrq->msgs) {
3152                 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
3153                 atomic_set(&scrq->used, 0);
3154                 scrq->cur = 0;
3155                 scrq->ind_buf.index = 0;
3156         } else {
3157                 netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
3158                 return -EINVAL;
3159         }
3160
3161         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3162                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3163         return rc;
3164 }
3165
3166 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
3167 {
3168         int i, rc;
3169
3170         if (!adapter->tx_scrq || !adapter->rx_scrq)
3171                 return -EINVAL;
3172
3173         for (i = 0; i < adapter->req_tx_queues; i++) {
3174                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
3175                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
3176                 if (rc)
3177                         return rc;
3178         }
3179
3180         for (i = 0; i < adapter->req_rx_queues; i++) {
3181                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
3182                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
3183                 if (rc)
3184                         return rc;
3185         }
3186
3187         return rc;
3188 }
3189
3190 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
3191                                   struct ibmvnic_sub_crq_queue *scrq,
3192                                   bool do_h_free)
3193 {
3194         struct device *dev = &adapter->vdev->dev;
3195         long rc;
3196
3197         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
3198
3199         if (do_h_free) {
3200                 /* Close the sub-crqs */
3201                 do {
3202                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3203                                                 adapter->vdev->unit_address,
3204                                                 scrq->crq_num);
3205                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3206
3207                 if (rc) {
3208                         netdev_err(adapter->netdev,
3209                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
3210                                    scrq->crq_num, rc);
3211                 }
3212         }
3213
3214         dma_free_coherent(dev,
3215                           IBMVNIC_IND_ARR_SZ,
3216                           scrq->ind_buf.indir_arr,
3217                           scrq->ind_buf.indir_dma);
3218
3219         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3220                          DMA_BIDIRECTIONAL);
3221         free_pages((unsigned long)scrq->msgs, 2);
3222         kfree(scrq);
3223 }
3224
3225 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
3226                                                         *adapter)
3227 {
3228         struct device *dev = &adapter->vdev->dev;
3229         struct ibmvnic_sub_crq_queue *scrq;
3230         int rc;
3231
3232         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
3233         if (!scrq)
3234                 return NULL;
3235
3236         scrq->msgs =
3237                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
3238         if (!scrq->msgs) {
3239                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
3240                 goto zero_page_failed;
3241         }
3242
3243         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
3244                                          DMA_BIDIRECTIONAL);
3245         if (dma_mapping_error(dev, scrq->msg_token)) {
3246                 dev_warn(dev, "Couldn't map crq queue messages page\n");
3247                 goto map_failed;
3248         }
3249
3250         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3251                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3252
3253         if (rc == H_RESOURCE)
3254                 rc = ibmvnic_reset_crq(adapter);
3255
3256         if (rc == H_CLOSED) {
3257                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
3258         } else if (rc) {
3259                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
3260                 goto reg_failed;
3261         }
3262
3263         scrq->adapter = adapter;
3264         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
3265         scrq->ind_buf.index = 0;
3266
3267         scrq->ind_buf.indir_arr =
3268                 dma_alloc_coherent(dev,
3269                                    IBMVNIC_IND_ARR_SZ,
3270                                    &scrq->ind_buf.indir_dma,
3271                                    GFP_KERNEL);
3272
3273         if (!scrq->ind_buf.indir_arr)
3274                 goto indir_failed;
3275
3276         spin_lock_init(&scrq->lock);
3277
3278         netdev_dbg(adapter->netdev,
3279                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
3280                    scrq->crq_num, scrq->hw_irq, scrq->irq);
3281
3282         return scrq;
3283
3284 indir_failed:
3285         do {
3286                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3287                                         adapter->vdev->unit_address,
3288                                         scrq->crq_num);
3289         } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
3290 reg_failed:
3291         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3292                          DMA_BIDIRECTIONAL);
3293 map_failed:
3294         free_pages((unsigned long)scrq->msgs, 2);
3295 zero_page_failed:
3296         kfree(scrq);
3297
3298         return NULL;
3299 }
3300
3301 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
3302 {
3303         int i;
3304
3305         if (adapter->tx_scrq) {
3306                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
3307                         if (!adapter->tx_scrq[i])
3308                                 continue;
3309
3310                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
3311                                    i);
3312                         ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
3313                         if (adapter->tx_scrq[i]->irq) {
3314                                 free_irq(adapter->tx_scrq[i]->irq,
3315                                          adapter->tx_scrq[i]);
3316                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
3317                                 adapter->tx_scrq[i]->irq = 0;
3318                         }
3319
3320                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
3321                                               do_h_free);
3322                 }
3323
3324                 kfree(adapter->tx_scrq);
3325                 adapter->tx_scrq = NULL;
3326                 adapter->num_active_tx_scrqs = 0;
3327         }
3328
3329         if (adapter->rx_scrq) {
3330                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
3331                         if (!adapter->rx_scrq[i])
3332                                 continue;
3333
3334                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
3335                                    i);
3336                         if (adapter->rx_scrq[i]->irq) {
3337                                 free_irq(adapter->rx_scrq[i]->irq,
3338                                          adapter->rx_scrq[i]);
3339                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
3340                                 adapter->rx_scrq[i]->irq = 0;
3341                         }
3342
3343                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
3344                                               do_h_free);
3345                 }
3346
3347                 kfree(adapter->rx_scrq);
3348                 adapter->rx_scrq = NULL;
3349                 adapter->num_active_rx_scrqs = 0;
3350         }
3351 }
3352
3353 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3354                             struct ibmvnic_sub_crq_queue *scrq)
3355 {
3356         struct device *dev = &adapter->vdev->dev;
3357         unsigned long rc;
3358
3359         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3360                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3361         if (rc)
3362                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3363                         scrq->hw_irq, rc);
3364         return rc;
3365 }
3366
3367 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3368                            struct ibmvnic_sub_crq_queue *scrq)
3369 {
3370         struct device *dev = &adapter->vdev->dev;
3371         unsigned long rc;
3372
3373         if (scrq->hw_irq > 0x100000000ULL) {
3374                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3375                 return 1;
3376         }
3377
3378         if (test_bit(0, &adapter->resetting) &&
3379             adapter->reset_reason == VNIC_RESET_MOBILITY) {
3380                 u64 val = (0xff000000) | scrq->hw_irq;
3381
3382                 rc = plpar_hcall_norets(H_EOI, val);
3383                 /* H_EOI would fail with rc = H_FUNCTION when running
3384                  * in XIVE mode which is expected, but not an error.
3385                  */
3386                 if (rc && (rc != H_FUNCTION))
3387                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3388                                 val, rc);
3389         }
3390
3391         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3392                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3393         if (rc)
3394                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3395                         scrq->hw_irq, rc);
3396         return rc;
3397 }
3398
3399 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3400                                struct ibmvnic_sub_crq_queue *scrq)
3401 {
3402         struct device *dev = &adapter->vdev->dev;
3403         struct ibmvnic_tx_pool *tx_pool;
3404         struct ibmvnic_tx_buff *txbuff;
3405         struct netdev_queue *txq;
3406         union sub_crq *next;
3407         int index;
3408         int i;
3409
3410 restart_loop:
3411         while (pending_scrq(adapter, scrq)) {
3412                 unsigned int pool = scrq->pool_index;
3413                 int num_entries = 0;
3414                 int total_bytes = 0;
3415                 int num_packets = 0;
3416
3417                 next = ibmvnic_next_scrq(adapter, scrq);
3418                 for (i = 0; i < next->tx_comp.num_comps; i++) {
3419                         index = be32_to_cpu(next->tx_comp.correlators[i]);
3420                         if (index & IBMVNIC_TSO_POOL_MASK) {
3421                                 tx_pool = &adapter->tso_pool[pool];
3422                                 index &= ~IBMVNIC_TSO_POOL_MASK;
3423                         } else {
3424                                 tx_pool = &adapter->tx_pool[pool];
3425                         }
3426
3427                         txbuff = &tx_pool->tx_buff[index];
3428                         num_packets++;
3429                         num_entries += txbuff->num_entries;
3430                         if (txbuff->skb) {
3431                                 total_bytes += txbuff->skb->len;
3432                                 if (next->tx_comp.rcs[i]) {
3433                                         dev_err(dev, "tx error %x\n",
3434                                                 next->tx_comp.rcs[i]);
3435                                         dev_kfree_skb_irq(txbuff->skb);
3436                                 } else {
3437                                         dev_consume_skb_irq(txbuff->skb);
3438                                 }
3439                                 txbuff->skb = NULL;
3440                         } else {
3441                                 netdev_warn(adapter->netdev,
3442                                             "TX completion received with NULL socket buffer\n");
3443                         }
3444                         tx_pool->free_map[tx_pool->producer_index] = index;
3445                         tx_pool->producer_index =
3446                                 (tx_pool->producer_index + 1) %
3447                                         tx_pool->num_buffers;
3448                 }
3449                 /* remove tx_comp scrq*/
3450                 next->tx_comp.first = 0;
3451
3452                 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
3453                 netdev_tx_completed_queue(txq, num_packets, total_bytes);
3454
3455                 if (atomic_sub_return(num_entries, &scrq->used) <=
3456                     (adapter->req_tx_entries_per_subcrq / 2) &&
3457                     __netif_subqueue_stopped(adapter->netdev,
3458                                              scrq->pool_index)) {
3459                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3460                         netdev_dbg(adapter->netdev, "Started queue %d\n",
3461                                    scrq->pool_index);
3462                 }
3463         }
3464
3465         enable_scrq_irq(adapter, scrq);
3466
3467         if (pending_scrq(adapter, scrq)) {
3468                 disable_scrq_irq(adapter, scrq);
3469                 goto restart_loop;
3470         }
3471
3472         return 0;
3473 }
3474
3475 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3476 {
3477         struct ibmvnic_sub_crq_queue *scrq = instance;
3478         struct ibmvnic_adapter *adapter = scrq->adapter;
3479
3480         disable_scrq_irq(adapter, scrq);
3481         ibmvnic_complete_tx(adapter, scrq);
3482
3483         return IRQ_HANDLED;
3484 }
3485
3486 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3487 {
3488         struct ibmvnic_sub_crq_queue *scrq = instance;
3489         struct ibmvnic_adapter *adapter = scrq->adapter;
3490
3491         /* When booting a kdump kernel we can hit pending interrupts
3492          * prior to completing driver initialization.
3493          */
3494         if (unlikely(adapter->state != VNIC_OPEN))
3495                 return IRQ_NONE;
3496
3497         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3498
3499         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3500                 disable_scrq_irq(adapter, scrq);
3501                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3502         }
3503
3504         return IRQ_HANDLED;
3505 }
3506
3507 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3508 {
3509         struct device *dev = &adapter->vdev->dev;
3510         struct ibmvnic_sub_crq_queue *scrq;
3511         int i = 0, j = 0;
3512         int rc = 0;
3513
3514         for (i = 0; i < adapter->req_tx_queues; i++) {
3515                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3516                            i);
3517                 scrq = adapter->tx_scrq[i];
3518                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3519
3520                 if (!scrq->irq) {
3521                         rc = -EINVAL;
3522                         dev_err(dev, "Error mapping irq\n");
3523                         goto req_tx_irq_failed;
3524                 }
3525
3526                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3527                          adapter->vdev->unit_address, i);
3528                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3529                                  0, scrq->name, scrq);
3530
3531                 if (rc) {
3532                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3533                                 scrq->irq, rc);
3534                         irq_dispose_mapping(scrq->irq);
3535                         goto req_tx_irq_failed;
3536                 }
3537         }
3538
3539         for (i = 0; i < adapter->req_rx_queues; i++) {
3540                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3541                            i);
3542                 scrq = adapter->rx_scrq[i];
3543                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3544                 if (!scrq->irq) {
3545                         rc = -EINVAL;
3546                         dev_err(dev, "Error mapping irq\n");
3547                         goto req_rx_irq_failed;
3548                 }
3549                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3550                          adapter->vdev->unit_address, i);
3551                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3552                                  0, scrq->name, scrq);
3553                 if (rc) {
3554                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3555                                 scrq->irq, rc);
3556                         irq_dispose_mapping(scrq->irq);
3557                         goto req_rx_irq_failed;
3558                 }
3559         }
3560         return rc;
3561
3562 req_rx_irq_failed:
3563         for (j = 0; j < i; j++) {
3564                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3565                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3566         }
3567         i = adapter->req_tx_queues;
3568 req_tx_irq_failed:
3569         for (j = 0; j < i; j++) {
3570                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3571                 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3572         }
3573         release_sub_crqs(adapter, 1);
3574         return rc;
3575 }
3576
3577 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3578 {
3579         struct device *dev = &adapter->vdev->dev;
3580         struct ibmvnic_sub_crq_queue **allqueues;
3581         int registered_queues = 0;
3582         int total_queues;
3583         int more = 0;
3584         int i;
3585
3586         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3587
3588         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3589         if (!allqueues)
3590                 return -1;
3591
3592         for (i = 0; i < total_queues; i++) {
3593                 allqueues[i] = init_sub_crq_queue(adapter);
3594                 if (!allqueues[i]) {
3595                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3596                         break;
3597                 }
3598                 registered_queues++;
3599         }
3600
3601         /* Make sure we were able to register the minimum number of queues */
3602         if (registered_queues <
3603             adapter->min_tx_queues + adapter->min_rx_queues) {
3604                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
3605                 goto tx_failed;
3606         }
3607
3608         /* Distribute the failed allocated queues*/
3609         for (i = 0; i < total_queues - registered_queues + more ; i++) {
3610                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3611                 switch (i % 3) {
3612                 case 0:
3613                         if (adapter->req_rx_queues > adapter->min_rx_queues)
3614                                 adapter->req_rx_queues--;
3615                         else
3616                                 more++;
3617                         break;
3618                 case 1:
3619                         if (adapter->req_tx_queues > adapter->min_tx_queues)
3620                                 adapter->req_tx_queues--;
3621                         else
3622                                 more++;
3623                         break;
3624                 }
3625         }
3626
3627         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3628                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
3629         if (!adapter->tx_scrq)
3630                 goto tx_failed;
3631
3632         for (i = 0; i < adapter->req_tx_queues; i++) {
3633                 adapter->tx_scrq[i] = allqueues[i];
3634                 adapter->tx_scrq[i]->pool_index = i;
3635                 adapter->num_active_tx_scrqs++;
3636         }
3637
3638         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3639                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
3640         if (!adapter->rx_scrq)
3641                 goto rx_failed;
3642
3643         for (i = 0; i < adapter->req_rx_queues; i++) {
3644                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3645                 adapter->rx_scrq[i]->scrq_num = i;
3646                 adapter->num_active_rx_scrqs++;
3647         }
3648
3649         kfree(allqueues);
3650         return 0;
3651
3652 rx_failed:
3653         kfree(adapter->tx_scrq);
3654         adapter->tx_scrq = NULL;
3655 tx_failed:
3656         for (i = 0; i < registered_queues; i++)
3657                 release_sub_crq_queue(adapter, allqueues[i], 1);
3658         kfree(allqueues);
3659         return -1;
3660 }
3661
3662 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3663 {
3664         struct device *dev = &adapter->vdev->dev;
3665         union ibmvnic_crq crq;
3666         int max_entries;
3667
3668         if (!retry) {
3669                 /* Sub-CRQ entries are 32 byte long */
3670                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3671
3672                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3673                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3674                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3675                         return;
3676                 }
3677
3678                 if (adapter->desired.mtu)
3679                         adapter->req_mtu = adapter->desired.mtu;
3680                 else
3681                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3682
3683                 if (!adapter->desired.tx_entries)
3684                         adapter->desired.tx_entries =
3685                                         adapter->max_tx_entries_per_subcrq;
3686                 if (!adapter->desired.rx_entries)
3687                         adapter->desired.rx_entries =
3688                                         adapter->max_rx_add_entries_per_subcrq;
3689
3690                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3691                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3692
3693                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3694                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3695                         adapter->desired.tx_entries = max_entries;
3696                 }
3697
3698                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3699                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3700                         adapter->desired.rx_entries = max_entries;
3701                 }
3702
3703                 if (adapter->desired.tx_entries)
3704                         adapter->req_tx_entries_per_subcrq =
3705                                         adapter->desired.tx_entries;
3706                 else
3707                         adapter->req_tx_entries_per_subcrq =
3708                                         adapter->max_tx_entries_per_subcrq;
3709
3710                 if (adapter->desired.rx_entries)
3711                         adapter->req_rx_add_entries_per_subcrq =
3712                                         adapter->desired.rx_entries;
3713                 else
3714                         adapter->req_rx_add_entries_per_subcrq =
3715                                         adapter->max_rx_add_entries_per_subcrq;
3716
3717                 if (adapter->desired.tx_queues)
3718                         adapter->req_tx_queues =
3719                                         adapter->desired.tx_queues;
3720                 else
3721                         adapter->req_tx_queues =
3722                                         adapter->opt_tx_comp_sub_queues;
3723
3724                 if (adapter->desired.rx_queues)
3725                         adapter->req_rx_queues =
3726                                         adapter->desired.rx_queues;
3727                 else
3728                         adapter->req_rx_queues =
3729                                         adapter->opt_rx_comp_queues;
3730
3731                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3732         }
3733
3734         memset(&crq, 0, sizeof(crq));
3735         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3736         crq.request_capability.cmd = REQUEST_CAPABILITY;
3737
3738         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3739         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3740         atomic_inc(&adapter->running_cap_crqs);
3741         ibmvnic_send_crq(adapter, &crq);
3742
3743         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3744         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3745         atomic_inc(&adapter->running_cap_crqs);
3746         ibmvnic_send_crq(adapter, &crq);
3747
3748         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3749         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3750         atomic_inc(&adapter->running_cap_crqs);
3751         ibmvnic_send_crq(adapter, &crq);
3752
3753         crq.request_capability.capability =
3754             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3755         crq.request_capability.number =
3756             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3757         atomic_inc(&adapter->running_cap_crqs);
3758         ibmvnic_send_crq(adapter, &crq);
3759
3760         crq.request_capability.capability =
3761             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3762         crq.request_capability.number =
3763             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3764         atomic_inc(&adapter->running_cap_crqs);
3765         ibmvnic_send_crq(adapter, &crq);
3766
3767         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3768         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3769         atomic_inc(&adapter->running_cap_crqs);
3770         ibmvnic_send_crq(adapter, &crq);
3771
3772         if (adapter->netdev->flags & IFF_PROMISC) {
3773                 if (adapter->promisc_supported) {
3774                         crq.request_capability.capability =
3775                             cpu_to_be16(PROMISC_REQUESTED);
3776                         crq.request_capability.number = cpu_to_be64(1);
3777                         atomic_inc(&adapter->running_cap_crqs);
3778                         ibmvnic_send_crq(adapter, &crq);
3779                 }
3780         } else {
3781                 crq.request_capability.capability =
3782                     cpu_to_be16(PROMISC_REQUESTED);
3783                 crq.request_capability.number = cpu_to_be64(0);
3784                 atomic_inc(&adapter->running_cap_crqs);
3785                 ibmvnic_send_crq(adapter, &crq);
3786         }
3787 }
3788
3789 static int pending_scrq(struct ibmvnic_adapter *adapter,
3790                         struct ibmvnic_sub_crq_queue *scrq)
3791 {
3792         union sub_crq *entry = &scrq->msgs[scrq->cur];
3793         int rc;
3794
3795         rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP);
3796
3797         /* Ensure that the SCRQ valid flag is loaded prior to loading the
3798          * contents of the SCRQ descriptor
3799          */
3800         dma_rmb();
3801
3802         return rc;
3803 }
3804
3805 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3806                                         struct ibmvnic_sub_crq_queue *scrq)
3807 {
3808         union sub_crq *entry;
3809         unsigned long flags;
3810
3811         spin_lock_irqsave(&scrq->lock, flags);
3812         entry = &scrq->msgs[scrq->cur];
3813         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3814                 if (++scrq->cur == scrq->size)
3815                         scrq->cur = 0;
3816         } else {
3817                 entry = NULL;
3818         }
3819         spin_unlock_irqrestore(&scrq->lock, flags);
3820
3821         /* Ensure that the SCRQ valid flag is loaded prior to loading the
3822          * contents of the SCRQ descriptor
3823          */
3824         dma_rmb();
3825
3826         return entry;
3827 }
3828
3829 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3830 {
3831         struct ibmvnic_crq_queue *queue = &adapter->crq;
3832         union ibmvnic_crq *crq;
3833
3834         crq = &queue->msgs[queue->cur];
3835         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3836                 if (++queue->cur == queue->size)
3837                         queue->cur = 0;
3838         } else {
3839                 crq = NULL;
3840         }
3841
3842         return crq;
3843 }
3844
3845 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3846 {
3847         switch (rc) {
3848         case H_PARAMETER:
3849                 dev_warn_ratelimited(dev,
3850                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3851                                      func, rc);
3852                 break;
3853         case H_CLOSED:
3854                 dev_warn_ratelimited(dev,
3855                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3856                                      func, rc);
3857                 break;
3858         default:
3859                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3860                 break;
3861         }
3862 }
3863
3864 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3865                                 u64 remote_handle, u64 ioba, u64 num_entries)
3866 {
3867         unsigned int ua = adapter->vdev->unit_address;
3868         struct device *dev = &adapter->vdev->dev;
3869         int rc;
3870
3871         /* Make sure the hypervisor sees the complete request */
3872         dma_wmb();
3873         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3874                                 cpu_to_be64(remote_handle),
3875                                 ioba, num_entries);
3876
3877         if (rc)
3878                 print_subcrq_error(dev, rc, __func__);
3879
3880         return rc;
3881 }
3882
3883 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3884                             union ibmvnic_crq *crq)
3885 {
3886         unsigned int ua = adapter->vdev->unit_address;
3887         struct device *dev = &adapter->vdev->dev;
3888         u64 *u64_crq = (u64 *)crq;
3889         int rc;
3890
3891         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3892                    (unsigned long)cpu_to_be64(u64_crq[0]),
3893                    (unsigned long)cpu_to_be64(u64_crq[1]));
3894
3895         if (!adapter->crq.active &&
3896             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3897                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3898                 return -EINVAL;
3899         }
3900
3901         /* Make sure the hypervisor sees the complete request */
3902         dma_wmb();
3903
3904         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3905                                 cpu_to_be64(u64_crq[0]),
3906                                 cpu_to_be64(u64_crq[1]));
3907
3908         if (rc) {
3909                 if (rc == H_CLOSED) {
3910                         dev_warn(dev, "CRQ Queue closed\n");
3911                         /* do not reset, report the fail, wait for passive init from server */
3912                 }
3913
3914                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3915         }
3916
3917         return rc;
3918 }
3919
3920 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3921 {
3922         struct device *dev = &adapter->vdev->dev;
3923         union ibmvnic_crq crq;
3924         int retries = 100;
3925         int rc;
3926
3927         memset(&crq, 0, sizeof(crq));
3928         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3929         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3930         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3931
3932         do {
3933                 rc = ibmvnic_send_crq(adapter, &crq);
3934                 if (rc != H_CLOSED)
3935                         break;
3936                 retries--;
3937                 msleep(50);
3938
3939         } while (retries > 0);
3940
3941         if (rc) {
3942                 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3943                 return rc;
3944         }
3945
3946         return 0;
3947 }
3948
3949 struct vnic_login_client_data {
3950         u8      type;
3951         __be16  len;
3952         char    name[];
3953 } __packed;
3954
3955 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3956 {
3957         int len;
3958
3959         /* Calculate the amount of buffer space needed for the
3960          * vnic client data in the login buffer. There are four entries,
3961          * OS name, LPAR name, device name, and a null last entry.
3962          */
3963         len = 4 * sizeof(struct vnic_login_client_data);
3964         len += 6; /* "Linux" plus NULL */
3965         len += strlen(utsname()->nodename) + 1;
3966         len += strlen(adapter->netdev->name) + 1;
3967
3968         return len;
3969 }
3970
3971 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3972                                  struct vnic_login_client_data *vlcd)
3973 {
3974         const char *os_name = "Linux";
3975         int len;
3976
3977         /* Type 1 - LPAR OS */
3978         vlcd->type = 1;
3979         len = strlen(os_name) + 1;
3980         vlcd->len = cpu_to_be16(len);
3981         strscpy(vlcd->name, os_name, len);
3982         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3983
3984         /* Type 2 - LPAR name */
3985         vlcd->type = 2;
3986         len = strlen(utsname()->nodename) + 1;
3987         vlcd->len = cpu_to_be16(len);
3988         strscpy(vlcd->name, utsname()->nodename, len);
3989         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3990
3991         /* Type 3 - device name */
3992         vlcd->type = 3;
3993         len = strlen(adapter->netdev->name) + 1;
3994         vlcd->len = cpu_to_be16(len);
3995         strscpy(vlcd->name, adapter->netdev->name, len);
3996 }
3997
3998 static int send_login(struct ibmvnic_adapter *adapter)
3999 {
4000         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
4001         struct ibmvnic_login_buffer *login_buffer;
4002         struct device *dev = &adapter->vdev->dev;
4003         struct vnic_login_client_data *vlcd;
4004         dma_addr_t rsp_buffer_token;
4005         dma_addr_t buffer_token;
4006         size_t rsp_buffer_size;
4007         union ibmvnic_crq crq;
4008         int client_data_len;
4009         size_t buffer_size;
4010         __be64 *tx_list_p;
4011         __be64 *rx_list_p;
4012         int rc;
4013         int i;
4014
4015         if (!adapter->tx_scrq || !adapter->rx_scrq) {
4016                 netdev_err(adapter->netdev,
4017                            "RX or TX queues are not allocated, device login failed\n");
4018                 return -1;
4019         }
4020
4021         release_login_buffer(adapter);
4022         release_login_rsp_buffer(adapter);
4023
4024         client_data_len = vnic_client_data_len(adapter);
4025
4026         buffer_size =
4027             sizeof(struct ibmvnic_login_buffer) +
4028             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
4029             client_data_len;
4030
4031         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
4032         if (!login_buffer)
4033                 goto buf_alloc_failed;
4034
4035         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
4036                                       DMA_TO_DEVICE);
4037         if (dma_mapping_error(dev, buffer_token)) {
4038                 dev_err(dev, "Couldn't map login buffer\n");
4039                 goto buf_map_failed;
4040         }
4041
4042         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
4043                           sizeof(u64) * adapter->req_tx_queues +
4044                           sizeof(u64) * adapter->req_rx_queues +
4045                           sizeof(u64) * adapter->req_rx_queues +
4046                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
4047
4048         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
4049         if (!login_rsp_buffer)
4050                 goto buf_rsp_alloc_failed;
4051
4052         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
4053                                           rsp_buffer_size, DMA_FROM_DEVICE);
4054         if (dma_mapping_error(dev, rsp_buffer_token)) {
4055                 dev_err(dev, "Couldn't map login rsp buffer\n");
4056                 goto buf_rsp_map_failed;
4057         }
4058
4059         adapter->login_buf = login_buffer;
4060         adapter->login_buf_token = buffer_token;
4061         adapter->login_buf_sz = buffer_size;
4062         adapter->login_rsp_buf = login_rsp_buffer;
4063         adapter->login_rsp_buf_token = rsp_buffer_token;
4064         adapter->login_rsp_buf_sz = rsp_buffer_size;
4065
4066         login_buffer->len = cpu_to_be32(buffer_size);
4067         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
4068         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
4069         login_buffer->off_txcomp_subcrqs =
4070             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
4071         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
4072         login_buffer->off_rxcomp_subcrqs =
4073             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
4074                         sizeof(u64) * adapter->req_tx_queues);
4075         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
4076         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
4077
4078         tx_list_p = (__be64 *)((char *)login_buffer +
4079                                       sizeof(struct ibmvnic_login_buffer));
4080         rx_list_p = (__be64 *)((char *)login_buffer +
4081                                       sizeof(struct ibmvnic_login_buffer) +
4082                                       sizeof(u64) * adapter->req_tx_queues);
4083
4084         for (i = 0; i < adapter->req_tx_queues; i++) {
4085                 if (adapter->tx_scrq[i]) {
4086                         tx_list_p[i] =
4087                                 cpu_to_be64(adapter->tx_scrq[i]->crq_num);
4088                 }
4089         }
4090
4091         for (i = 0; i < adapter->req_rx_queues; i++) {
4092                 if (adapter->rx_scrq[i]) {
4093                         rx_list_p[i] =
4094                                 cpu_to_be64(adapter->rx_scrq[i]->crq_num);
4095                 }
4096         }
4097
4098         /* Insert vNIC login client data */
4099         vlcd = (struct vnic_login_client_data *)
4100                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
4101         login_buffer->client_data_offset =
4102                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
4103         login_buffer->client_data_len = cpu_to_be32(client_data_len);
4104
4105         vnic_add_client_data(adapter, vlcd);
4106
4107         netdev_dbg(adapter->netdev, "Login Buffer:\n");
4108         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
4109                 netdev_dbg(adapter->netdev, "%016lx\n",
4110                            ((unsigned long *)(adapter->login_buf))[i]);
4111         }
4112
4113         memset(&crq, 0, sizeof(crq));
4114         crq.login.first = IBMVNIC_CRQ_CMD;
4115         crq.login.cmd = LOGIN;
4116         crq.login.ioba = cpu_to_be32(buffer_token);
4117         crq.login.len = cpu_to_be32(buffer_size);
4118
4119         adapter->login_pending = true;
4120         rc = ibmvnic_send_crq(adapter, &crq);
4121         if (rc) {
4122                 adapter->login_pending = false;
4123                 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
4124                 goto buf_rsp_map_failed;
4125         }
4126
4127         return 0;
4128
4129 buf_rsp_map_failed:
4130         kfree(login_rsp_buffer);
4131         adapter->login_rsp_buf = NULL;
4132 buf_rsp_alloc_failed:
4133         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
4134 buf_map_failed:
4135         kfree(login_buffer);
4136         adapter->login_buf = NULL;
4137 buf_alloc_failed:
4138         return -1;
4139 }
4140
4141 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
4142                             u32 len, u8 map_id)
4143 {
4144         union ibmvnic_crq crq;
4145
4146         memset(&crq, 0, sizeof(crq));
4147         crq.request_map.first = IBMVNIC_CRQ_CMD;
4148         crq.request_map.cmd = REQUEST_MAP;
4149         crq.request_map.map_id = map_id;
4150         crq.request_map.ioba = cpu_to_be32(addr);
4151         crq.request_map.len = cpu_to_be32(len);
4152         return ibmvnic_send_crq(adapter, &crq);
4153 }
4154
4155 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
4156 {
4157         union ibmvnic_crq crq;
4158
4159         memset(&crq, 0, sizeof(crq));
4160         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
4161         crq.request_unmap.cmd = REQUEST_UNMAP;
4162         crq.request_unmap.map_id = map_id;
4163         return ibmvnic_send_crq(adapter, &crq);
4164 }
4165
4166 static void send_query_map(struct ibmvnic_adapter *adapter)
4167 {
4168         union ibmvnic_crq crq;
4169
4170         memset(&crq, 0, sizeof(crq));
4171         crq.query_map.first = IBMVNIC_CRQ_CMD;
4172         crq.query_map.cmd = QUERY_MAP;
4173         ibmvnic_send_crq(adapter, &crq);
4174 }
4175
4176 /* Send a series of CRQs requesting various capabilities of the VNIC server */
4177 static void send_query_cap(struct ibmvnic_adapter *adapter)
4178 {
4179         union ibmvnic_crq crq;
4180
4181         atomic_set(&adapter->running_cap_crqs, 0);
4182         memset(&crq, 0, sizeof(crq));
4183         crq.query_capability.first = IBMVNIC_CRQ_CMD;
4184         crq.query_capability.cmd = QUERY_CAPABILITY;
4185
4186         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
4187         atomic_inc(&adapter->running_cap_crqs);
4188         ibmvnic_send_crq(adapter, &crq);
4189
4190         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
4191         atomic_inc(&adapter->running_cap_crqs);
4192         ibmvnic_send_crq(adapter, &crq);
4193
4194         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
4195         atomic_inc(&adapter->running_cap_crqs);
4196         ibmvnic_send_crq(adapter, &crq);
4197
4198         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
4199         atomic_inc(&adapter->running_cap_crqs);
4200         ibmvnic_send_crq(adapter, &crq);
4201
4202         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
4203         atomic_inc(&adapter->running_cap_crqs);
4204         ibmvnic_send_crq(adapter, &crq);
4205
4206         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
4207         atomic_inc(&adapter->running_cap_crqs);
4208         ibmvnic_send_crq(adapter, &crq);
4209
4210         crq.query_capability.capability =
4211             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
4212         atomic_inc(&adapter->running_cap_crqs);
4213         ibmvnic_send_crq(adapter, &crq);
4214
4215         crq.query_capability.capability =
4216             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
4217         atomic_inc(&adapter->running_cap_crqs);
4218         ibmvnic_send_crq(adapter, &crq);
4219
4220         crq.query_capability.capability =
4221             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
4222         atomic_inc(&adapter->running_cap_crqs);
4223         ibmvnic_send_crq(adapter, &crq);
4224
4225         crq.query_capability.capability =
4226             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
4227         atomic_inc(&adapter->running_cap_crqs);
4228         ibmvnic_send_crq(adapter, &crq);
4229
4230         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
4231         atomic_inc(&adapter->running_cap_crqs);
4232         ibmvnic_send_crq(adapter, &crq);
4233
4234         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
4235         atomic_inc(&adapter->running_cap_crqs);
4236         ibmvnic_send_crq(adapter, &crq);
4237
4238         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
4239         atomic_inc(&adapter->running_cap_crqs);
4240         ibmvnic_send_crq(adapter, &crq);
4241
4242         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
4243         atomic_inc(&adapter->running_cap_crqs);
4244         ibmvnic_send_crq(adapter, &crq);
4245
4246         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
4247         atomic_inc(&adapter->running_cap_crqs);
4248         ibmvnic_send_crq(adapter, &crq);
4249
4250         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
4251         atomic_inc(&adapter->running_cap_crqs);
4252         ibmvnic_send_crq(adapter, &crq);
4253
4254         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
4255         atomic_inc(&adapter->running_cap_crqs);
4256         ibmvnic_send_crq(adapter, &crq);
4257
4258         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
4259         atomic_inc(&adapter->running_cap_crqs);
4260         ibmvnic_send_crq(adapter, &crq);
4261
4262         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
4263         atomic_inc(&adapter->running_cap_crqs);
4264         ibmvnic_send_crq(adapter, &crq);
4265
4266         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
4267         atomic_inc(&adapter->running_cap_crqs);
4268         ibmvnic_send_crq(adapter, &crq);
4269
4270         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
4271         atomic_inc(&adapter->running_cap_crqs);
4272         ibmvnic_send_crq(adapter, &crq);
4273
4274         crq.query_capability.capability =
4275                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
4276         atomic_inc(&adapter->running_cap_crqs);
4277         ibmvnic_send_crq(adapter, &crq);
4278
4279         crq.query_capability.capability =
4280                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
4281         atomic_inc(&adapter->running_cap_crqs);
4282         ibmvnic_send_crq(adapter, &crq);
4283
4284         crq.query_capability.capability =
4285                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
4286         atomic_inc(&adapter->running_cap_crqs);
4287         ibmvnic_send_crq(adapter, &crq);
4288
4289         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
4290         atomic_inc(&adapter->running_cap_crqs);
4291         ibmvnic_send_crq(adapter, &crq);
4292 }
4293
4294 static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
4295 {
4296         int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4297         struct device *dev = &adapter->vdev->dev;
4298         union ibmvnic_crq crq;
4299
4300         adapter->ip_offload_tok =
4301                 dma_map_single(dev,
4302                                &adapter->ip_offload_buf,
4303                                buf_sz,
4304                                DMA_FROM_DEVICE);
4305
4306         if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4307                 if (!firmware_has_feature(FW_FEATURE_CMO))
4308                         dev_err(dev, "Couldn't map offload buffer\n");
4309                 return;
4310         }
4311
4312         memset(&crq, 0, sizeof(crq));
4313         crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4314         crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4315         crq.query_ip_offload.len = cpu_to_be32(buf_sz);
4316         crq.query_ip_offload.ioba =
4317             cpu_to_be32(adapter->ip_offload_tok);
4318
4319         ibmvnic_send_crq(adapter, &crq);
4320 }
4321
4322 static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
4323 {
4324         struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
4325         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4326         struct device *dev = &adapter->vdev->dev;
4327         netdev_features_t old_hw_features = 0;
4328         union ibmvnic_crq crq;
4329
4330         adapter->ip_offload_ctrl_tok =
4331                 dma_map_single(dev,
4332                                ctrl_buf,
4333                                sizeof(adapter->ip_offload_ctrl),
4334                                DMA_TO_DEVICE);
4335
4336         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4337                 dev_err(dev, "Couldn't map ip offload control buffer\n");
4338                 return;
4339         }
4340
4341         ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4342         ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4343         ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4344         ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4345         ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4346         ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4347         ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4348         ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4349         ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4350         ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4351
4352         /* large_rx disabled for now, additional features needed */
4353         ctrl_buf->large_rx_ipv4 = 0;
4354         ctrl_buf->large_rx_ipv6 = 0;
4355
4356         if (adapter->state != VNIC_PROBING) {
4357                 old_hw_features = adapter->netdev->hw_features;
4358                 adapter->netdev->hw_features = 0;
4359         }
4360
4361         adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4362
4363         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4364                 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4365
4366         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4367                 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4368
4369         if ((adapter->netdev->features &
4370             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4371                 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4372
4373         if (buf->large_tx_ipv4)
4374                 adapter->netdev->hw_features |= NETIF_F_TSO;
4375         if (buf->large_tx_ipv6)
4376                 adapter->netdev->hw_features |= NETIF_F_TSO6;
4377
4378         if (adapter->state == VNIC_PROBING) {
4379                 adapter->netdev->features |= adapter->netdev->hw_features;
4380         } else if (old_hw_features != adapter->netdev->hw_features) {
4381                 netdev_features_t tmp = 0;
4382
4383                 /* disable features no longer supported */
4384                 adapter->netdev->features &= adapter->netdev->hw_features;
4385                 /* turn on features now supported if previously enabled */
4386                 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4387                         adapter->netdev->hw_features;
4388                 adapter->netdev->features |=
4389                                 tmp & adapter->netdev->wanted_features;
4390         }
4391
4392         memset(&crq, 0, sizeof(crq));
4393         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4394         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4395         crq.control_ip_offload.len =
4396             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4397         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4398         ibmvnic_send_crq(adapter, &crq);
4399 }
4400
4401 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4402                                 struct ibmvnic_adapter *adapter)
4403 {
4404         struct device *dev = &adapter->vdev->dev;
4405
4406         if (crq->get_vpd_size_rsp.rc.code) {
4407                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4408                         crq->get_vpd_size_rsp.rc.code);
4409                 complete(&adapter->fw_done);
4410                 return;
4411         }
4412
4413         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4414         complete(&adapter->fw_done);
4415 }
4416
4417 static void handle_vpd_rsp(union ibmvnic_crq *crq,
4418                            struct ibmvnic_adapter *adapter)
4419 {
4420         struct device *dev = &adapter->vdev->dev;
4421         unsigned char *substr = NULL;
4422         u8 fw_level_len = 0;
4423
4424         memset(adapter->fw_version, 0, 32);
4425
4426         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4427                          DMA_FROM_DEVICE);
4428
4429         if (crq->get_vpd_rsp.rc.code) {
4430                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4431                         crq->get_vpd_rsp.rc.code);
4432                 goto complete;
4433         }
4434
4435         /* get the position of the firmware version info
4436          * located after the ASCII 'RM' substring in the buffer
4437          */
4438         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4439         if (!substr) {
4440                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4441                 goto complete;
4442         }
4443
4444         /* get length of firmware level ASCII substring */
4445         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4446                 fw_level_len = *(substr + 2);
4447         } else {
4448                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4449                 goto complete;
4450         }
4451
4452         /* copy firmware version string from vpd into adapter */
4453         if ((substr + 3 + fw_level_len) <
4454             (adapter->vpd->buff + adapter->vpd->len)) {
4455                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4456         } else {
4457                 dev_info(dev, "FW substr extrapolated VPD buff\n");
4458         }
4459
4460 complete:
4461         if (adapter->fw_version[0] == '\0')
4462                 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version));
4463         complete(&adapter->fw_done);
4464 }
4465
4466 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4467 {
4468         struct device *dev = &adapter->vdev->dev;
4469         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4470         int i;
4471
4472         dma_unmap_single(dev, adapter->ip_offload_tok,
4473                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4474
4475         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4476         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4477                 netdev_dbg(adapter->netdev, "%016lx\n",
4478                            ((unsigned long *)(buf))[i]);
4479
4480         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4481         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4482         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4483                    buf->tcp_ipv4_chksum);
4484         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4485                    buf->tcp_ipv6_chksum);
4486         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4487                    buf->udp_ipv4_chksum);
4488         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4489                    buf->udp_ipv6_chksum);
4490         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4491                    buf->large_tx_ipv4);
4492         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4493                    buf->large_tx_ipv6);
4494         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4495                    buf->large_rx_ipv4);
4496         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4497                    buf->large_rx_ipv6);
4498         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4499                    buf->max_ipv4_header_size);
4500         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4501                    buf->max_ipv6_header_size);
4502         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4503                    buf->max_tcp_header_size);
4504         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4505                    buf->max_udp_header_size);
4506         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4507                    buf->max_large_tx_size);
4508         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4509                    buf->max_large_rx_size);
4510         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4511                    buf->ipv6_extension_header);
4512         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4513                    buf->tcp_pseudosum_req);
4514         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4515                    buf->num_ipv6_ext_headers);
4516         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4517                    buf->off_ipv6_ext_headers);
4518
4519         send_control_ip_offload(adapter);
4520 }
4521
4522 static const char *ibmvnic_fw_err_cause(u16 cause)
4523 {
4524         switch (cause) {
4525         case ADAPTER_PROBLEM:
4526                 return "adapter problem";
4527         case BUS_PROBLEM:
4528                 return "bus problem";
4529         case FW_PROBLEM:
4530                 return "firmware problem";
4531         case DD_PROBLEM:
4532                 return "device driver problem";
4533         case EEH_RECOVERY:
4534                 return "EEH recovery";
4535         case FW_UPDATED:
4536                 return "firmware updated";
4537         case LOW_MEMORY:
4538                 return "low Memory";
4539         default:
4540                 return "unknown";
4541         }
4542 }
4543
4544 static void handle_error_indication(union ibmvnic_crq *crq,
4545                                     struct ibmvnic_adapter *adapter)
4546 {
4547         struct device *dev = &adapter->vdev->dev;
4548         u16 cause;
4549
4550         cause = be16_to_cpu(crq->error_indication.error_cause);
4551
4552         dev_warn_ratelimited(dev,
4553                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
4554                              crq->error_indication.flags
4555                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4556                              ibmvnic_fw_err_cause(cause));
4557
4558         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4559                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4560         else
4561                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4562 }
4563
4564 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4565                                  struct ibmvnic_adapter *adapter)
4566 {
4567         struct net_device *netdev = adapter->netdev;
4568         struct device *dev = &adapter->vdev->dev;
4569         long rc;
4570
4571         rc = crq->change_mac_addr_rsp.rc.code;
4572         if (rc) {
4573                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4574                 goto out;
4575         }
4576         /* crq->change_mac_addr.mac_addr is the requested one
4577          * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4578          */
4579         ether_addr_copy(netdev->dev_addr,
4580                         &crq->change_mac_addr_rsp.mac_addr[0]);
4581         ether_addr_copy(adapter->mac_addr,
4582                         &crq->change_mac_addr_rsp.mac_addr[0]);
4583 out:
4584         complete(&adapter->fw_done);
4585         return rc;
4586 }
4587
4588 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4589                                    struct ibmvnic_adapter *adapter)
4590 {
4591         struct device *dev = &adapter->vdev->dev;
4592         u64 *req_value;
4593         char *name;
4594
4595         atomic_dec(&adapter->running_cap_crqs);
4596         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4597         case REQ_TX_QUEUES:
4598                 req_value = &adapter->req_tx_queues;
4599                 name = "tx";
4600                 break;
4601         case REQ_RX_QUEUES:
4602                 req_value = &adapter->req_rx_queues;
4603                 name = "rx";
4604                 break;
4605         case REQ_RX_ADD_QUEUES:
4606                 req_value = &adapter->req_rx_add_queues;
4607                 name = "rx_add";
4608                 break;
4609         case REQ_TX_ENTRIES_PER_SUBCRQ:
4610                 req_value = &adapter->req_tx_entries_per_subcrq;
4611                 name = "tx_entries_per_subcrq";
4612                 break;
4613         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4614                 req_value = &adapter->req_rx_add_entries_per_subcrq;
4615                 name = "rx_add_entries_per_subcrq";
4616                 break;
4617         case REQ_MTU:
4618                 req_value = &adapter->req_mtu;
4619                 name = "mtu";
4620                 break;
4621         case PROMISC_REQUESTED:
4622                 req_value = &adapter->promisc;
4623                 name = "promisc";
4624                 break;
4625         default:
4626                 dev_err(dev, "Got invalid cap request rsp %d\n",
4627                         crq->request_capability.capability);
4628                 return;
4629         }
4630
4631         switch (crq->request_capability_rsp.rc.code) {
4632         case SUCCESS:
4633                 break;
4634         case PARTIALSUCCESS:
4635                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4636                          *req_value,
4637                          (long)be64_to_cpu(crq->request_capability_rsp.number),
4638                          name);
4639
4640                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4641                     REQ_MTU) {
4642                         pr_err("mtu of %llu is not supported. Reverting.\n",
4643                                *req_value);
4644                         *req_value = adapter->fallback.mtu;
4645                 } else {
4646                         *req_value =
4647                                 be64_to_cpu(crq->request_capability_rsp.number);
4648                 }
4649
4650                 send_request_cap(adapter, 1);
4651                 return;
4652         default:
4653                 dev_err(dev, "Error %d in request cap rsp\n",
4654                         crq->request_capability_rsp.rc.code);
4655                 return;
4656         }
4657
4658         /* Done receiving requested capabilities, query IP offload support */
4659         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4660                 adapter->wait_capability = false;
4661                 send_query_ip_offload(adapter);
4662         }
4663 }
4664
4665 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4666                             struct ibmvnic_adapter *adapter)
4667 {
4668         struct device *dev = &adapter->vdev->dev;
4669         struct net_device *netdev = adapter->netdev;
4670         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4671         struct ibmvnic_login_buffer *login = adapter->login_buf;
4672         u64 *tx_handle_array;
4673         u64 *rx_handle_array;
4674         int num_tx_pools;
4675         int num_rx_pools;
4676         u64 *size_array;
4677         int i;
4678
4679         /* CHECK: Test/set of login_pending does not need to be atomic
4680          * because only ibmvnic_tasklet tests/clears this.
4681          */
4682         if (!adapter->login_pending) {
4683                 netdev_warn(netdev, "Ignoring unexpected login response\n");
4684                 return 0;
4685         }
4686         adapter->login_pending = false;
4687
4688         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4689                          DMA_TO_DEVICE);
4690         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4691                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4692
4693         /* If the number of queues requested can't be allocated by the
4694          * server, the login response will return with code 1. We will need
4695          * to resend the login buffer with fewer queues requested.
4696          */
4697         if (login_rsp_crq->generic.rc.code) {
4698                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4699                 complete(&adapter->init_done);
4700                 return 0;
4701         }
4702
4703         if (adapter->failover_pending) {
4704                 adapter->init_done_rc = -EAGAIN;
4705                 netdev_dbg(netdev, "Failover pending, ignoring login response\n");
4706                 complete(&adapter->init_done);
4707                 /* login response buffer will be released on reset */
4708                 return 0;
4709         }
4710
4711         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4712
4713         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4714         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4715                 netdev_dbg(adapter->netdev, "%016lx\n",
4716                            ((unsigned long *)(adapter->login_rsp_buf))[i]);
4717         }
4718
4719         /* Sanity checks */
4720         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4721             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4722              adapter->req_rx_add_queues !=
4723              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4724                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4725                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4726                 return -EIO;
4727         }
4728         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4729                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4730         /* variable buffer sizes are not supported, so just read the
4731          * first entry.
4732          */
4733         adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4734
4735         num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4736         num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4737
4738         tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4739                                   be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4740         rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4741                                   be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4742
4743         for (i = 0; i < num_tx_pools; i++)
4744                 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4745
4746         for (i = 0; i < num_rx_pools; i++)
4747                 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4748
4749         adapter->num_active_tx_scrqs = num_tx_pools;
4750         adapter->num_active_rx_scrqs = num_rx_pools;
4751         release_login_rsp_buffer(adapter);
4752         release_login_buffer(adapter);
4753         complete(&adapter->init_done);
4754
4755         return 0;
4756 }
4757
4758 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4759                                      struct ibmvnic_adapter *adapter)
4760 {
4761         struct device *dev = &adapter->vdev->dev;
4762         long rc;
4763
4764         rc = crq->request_unmap_rsp.rc.code;
4765         if (rc)
4766                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4767 }
4768
4769 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4770                                  struct ibmvnic_adapter *adapter)
4771 {
4772         struct net_device *netdev = adapter->netdev;
4773         struct device *dev = &adapter->vdev->dev;
4774         long rc;
4775
4776         rc = crq->query_map_rsp.rc.code;
4777         if (rc) {
4778                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4779                 return;
4780         }
4781         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4782                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4783                    crq->query_map_rsp.free_pages);
4784 }
4785
4786 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4787                                  struct ibmvnic_adapter *adapter)
4788 {
4789         struct net_device *netdev = adapter->netdev;
4790         struct device *dev = &adapter->vdev->dev;
4791         long rc;
4792
4793         atomic_dec(&adapter->running_cap_crqs);
4794         netdev_dbg(netdev, "Outstanding queries: %d\n",
4795                    atomic_read(&adapter->running_cap_crqs));
4796         rc = crq->query_capability.rc.code;
4797         if (rc) {
4798                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4799                 goto out;
4800         }
4801
4802         switch (be16_to_cpu(crq->query_capability.capability)) {
4803         case MIN_TX_QUEUES:
4804                 adapter->min_tx_queues =
4805                     be64_to_cpu(crq->query_capability.number);
4806                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4807                            adapter->min_tx_queues);
4808                 break;
4809         case MIN_RX_QUEUES:
4810                 adapter->min_rx_queues =
4811                     be64_to_cpu(crq->query_capability.number);
4812                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4813                            adapter->min_rx_queues);
4814                 break;
4815         case MIN_RX_ADD_QUEUES:
4816                 adapter->min_rx_add_queues =
4817                     be64_to_cpu(crq->query_capability.number);
4818                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4819                            adapter->min_rx_add_queues);
4820                 break;
4821         case MAX_TX_QUEUES:
4822                 adapter->max_tx_queues =
4823                     be64_to_cpu(crq->query_capability.number);
4824                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4825                            adapter->max_tx_queues);
4826                 break;
4827         case MAX_RX_QUEUES:
4828                 adapter->max_rx_queues =
4829                     be64_to_cpu(crq->query_capability.number);
4830                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4831                            adapter->max_rx_queues);
4832                 break;
4833         case MAX_RX_ADD_QUEUES:
4834                 adapter->max_rx_add_queues =
4835                     be64_to_cpu(crq->query_capability.number);
4836                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4837                            adapter->max_rx_add_queues);
4838                 break;
4839         case MIN_TX_ENTRIES_PER_SUBCRQ:
4840                 adapter->min_tx_entries_per_subcrq =
4841                     be64_to_cpu(crq->query_capability.number);
4842                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4843                            adapter->min_tx_entries_per_subcrq);
4844                 break;
4845         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4846                 adapter->min_rx_add_entries_per_subcrq =
4847                     be64_to_cpu(crq->query_capability.number);
4848                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4849                            adapter->min_rx_add_entries_per_subcrq);
4850                 break;
4851         case MAX_TX_ENTRIES_PER_SUBCRQ:
4852                 adapter->max_tx_entries_per_subcrq =
4853                     be64_to_cpu(crq->query_capability.number);
4854                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4855                            adapter->max_tx_entries_per_subcrq);
4856                 break;
4857         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4858                 adapter->max_rx_add_entries_per_subcrq =
4859                     be64_to_cpu(crq->query_capability.number);
4860                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4861                            adapter->max_rx_add_entries_per_subcrq);
4862                 break;
4863         case TCP_IP_OFFLOAD:
4864                 adapter->tcp_ip_offload =
4865                     be64_to_cpu(crq->query_capability.number);
4866                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4867                            adapter->tcp_ip_offload);
4868                 break;
4869         case PROMISC_SUPPORTED:
4870                 adapter->promisc_supported =
4871                     be64_to_cpu(crq->query_capability.number);
4872                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4873                            adapter->promisc_supported);
4874                 break;
4875         case MIN_MTU:
4876                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4877                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4878                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4879                 break;
4880         case MAX_MTU:
4881                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4882                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4883                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4884                 break;
4885         case MAX_MULTICAST_FILTERS:
4886                 adapter->max_multicast_filters =
4887                     be64_to_cpu(crq->query_capability.number);
4888                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4889                            adapter->max_multicast_filters);
4890                 break;
4891         case VLAN_HEADER_INSERTION:
4892                 adapter->vlan_header_insertion =
4893                     be64_to_cpu(crq->query_capability.number);
4894                 if (adapter->vlan_header_insertion)
4895                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4896                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4897                            adapter->vlan_header_insertion);
4898                 break;
4899         case RX_VLAN_HEADER_INSERTION:
4900                 adapter->rx_vlan_header_insertion =
4901                     be64_to_cpu(crq->query_capability.number);
4902                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4903                            adapter->rx_vlan_header_insertion);
4904                 break;
4905         case MAX_TX_SG_ENTRIES:
4906                 adapter->max_tx_sg_entries =
4907                     be64_to_cpu(crq->query_capability.number);
4908                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4909                            adapter->max_tx_sg_entries);
4910                 break;
4911         case RX_SG_SUPPORTED:
4912                 adapter->rx_sg_supported =
4913                     be64_to_cpu(crq->query_capability.number);
4914                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4915                            adapter->rx_sg_supported);
4916                 break;
4917         case OPT_TX_COMP_SUB_QUEUES:
4918                 adapter->opt_tx_comp_sub_queues =
4919                     be64_to_cpu(crq->query_capability.number);
4920                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4921                            adapter->opt_tx_comp_sub_queues);
4922                 break;
4923         case OPT_RX_COMP_QUEUES:
4924                 adapter->opt_rx_comp_queues =
4925                     be64_to_cpu(crq->query_capability.number);
4926                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4927                            adapter->opt_rx_comp_queues);
4928                 break;
4929         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4930                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4931                     be64_to_cpu(crq->query_capability.number);
4932                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4933                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4934                 break;
4935         case OPT_TX_ENTRIES_PER_SUBCRQ:
4936                 adapter->opt_tx_entries_per_subcrq =
4937                     be64_to_cpu(crq->query_capability.number);
4938                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4939                            adapter->opt_tx_entries_per_subcrq);
4940                 break;
4941         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4942                 adapter->opt_rxba_entries_per_subcrq =
4943                     be64_to_cpu(crq->query_capability.number);
4944                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4945                            adapter->opt_rxba_entries_per_subcrq);
4946                 break;
4947         case TX_RX_DESC_REQ:
4948                 adapter->tx_rx_desc_req = crq->query_capability.number;
4949                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4950                            adapter->tx_rx_desc_req);
4951                 break;
4952
4953         default:
4954                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4955                            crq->query_capability.capability);
4956         }
4957
4958 out:
4959         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4960                 adapter->wait_capability = false;
4961                 send_request_cap(adapter, 0);
4962         }
4963 }
4964
4965 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4966 {
4967         union ibmvnic_crq crq;
4968         int rc;
4969
4970         memset(&crq, 0, sizeof(crq));
4971         crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4972         crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4973
4974         mutex_lock(&adapter->fw_lock);
4975         adapter->fw_done_rc = 0;
4976         reinit_completion(&adapter->fw_done);
4977
4978         rc = ibmvnic_send_crq(adapter, &crq);
4979         if (rc) {
4980                 mutex_unlock(&adapter->fw_lock);
4981                 return rc;
4982         }
4983
4984         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4985         if (rc) {
4986                 mutex_unlock(&adapter->fw_lock);
4987                 return rc;
4988         }
4989
4990         mutex_unlock(&adapter->fw_lock);
4991         return adapter->fw_done_rc ? -EIO : 0;
4992 }
4993
4994 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4995                                        struct ibmvnic_adapter *adapter)
4996 {
4997         struct net_device *netdev = adapter->netdev;
4998         int rc;
4999         __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
5000
5001         rc = crq->query_phys_parms_rsp.rc.code;
5002         if (rc) {
5003                 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
5004                 return rc;
5005         }
5006         switch (rspeed) {
5007         case IBMVNIC_10MBPS:
5008                 adapter->speed = SPEED_10;
5009                 break;
5010         case IBMVNIC_100MBPS:
5011                 adapter->speed = SPEED_100;
5012                 break;
5013         case IBMVNIC_1GBPS:
5014                 adapter->speed = SPEED_1000;
5015                 break;
5016         case IBMVNIC_10GBPS:
5017                 adapter->speed = SPEED_10000;
5018                 break;
5019         case IBMVNIC_25GBPS:
5020                 adapter->speed = SPEED_25000;
5021                 break;
5022         case IBMVNIC_40GBPS:
5023                 adapter->speed = SPEED_40000;
5024                 break;
5025         case IBMVNIC_50GBPS:
5026                 adapter->speed = SPEED_50000;
5027                 break;
5028         case IBMVNIC_100GBPS:
5029                 adapter->speed = SPEED_100000;
5030                 break;
5031         case IBMVNIC_200GBPS:
5032                 adapter->speed = SPEED_200000;
5033                 break;
5034         default:
5035                 if (netif_carrier_ok(netdev))
5036                         netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
5037                 adapter->speed = SPEED_UNKNOWN;
5038         }
5039         if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
5040                 adapter->duplex = DUPLEX_FULL;
5041         else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
5042                 adapter->duplex = DUPLEX_HALF;
5043         else
5044                 adapter->duplex = DUPLEX_UNKNOWN;
5045
5046         return rc;
5047 }
5048
5049 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
5050                                struct ibmvnic_adapter *adapter)
5051 {
5052         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
5053         struct net_device *netdev = adapter->netdev;
5054         struct device *dev = &adapter->vdev->dev;
5055         u64 *u64_crq = (u64 *)crq;
5056         long rc;
5057
5058         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
5059                    (unsigned long)cpu_to_be64(u64_crq[0]),
5060                    (unsigned long)cpu_to_be64(u64_crq[1]));
5061         switch (gen_crq->first) {
5062         case IBMVNIC_CRQ_INIT_RSP:
5063                 switch (gen_crq->cmd) {
5064                 case IBMVNIC_CRQ_INIT:
5065                         dev_info(dev, "Partner initialized\n");
5066                         adapter->from_passive_init = true;
5067                         /* Discard any stale login responses from prev reset.
5068                          * CHECK: should we clear even on INIT_COMPLETE?
5069                          */
5070                         adapter->login_pending = false;
5071
5072                         if (!completion_done(&adapter->init_done)) {
5073                                 complete(&adapter->init_done);
5074                                 adapter->init_done_rc = -EIO;
5075                         }
5076
5077                         if (adapter->state == VNIC_DOWN)
5078                                 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT);
5079                         else
5080                                 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
5081
5082                         if (rc && rc != -EBUSY) {
5083                                 /* We were unable to schedule the failover
5084                                  * reset either because the adapter was still
5085                                  * probing (eg: during kexec) or we could not
5086                                  * allocate memory. Clear the failover_pending
5087                                  * flag since no one else will. We ignore
5088                                  * EBUSY because it means either FAILOVER reset
5089                                  * is already scheduled or the adapter is
5090                                  * being removed.
5091                                  */
5092                                 netdev_err(netdev,
5093                                            "Error %ld scheduling failover reset\n",
5094                                            rc);
5095                                 adapter->failover_pending = false;
5096                         }
5097                         break;
5098                 case IBMVNIC_CRQ_INIT_COMPLETE:
5099                         dev_info(dev, "Partner initialization complete\n");
5100                         adapter->crq.active = true;
5101                         send_version_xchg(adapter);
5102                         break;
5103                 default:
5104                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
5105                 }
5106                 return;
5107         case IBMVNIC_CRQ_XPORT_EVENT:
5108                 netif_carrier_off(netdev);
5109                 adapter->crq.active = false;
5110                 /* terminate any thread waiting for a response
5111                  * from the device
5112                  */
5113                 if (!completion_done(&adapter->fw_done)) {
5114                         adapter->fw_done_rc = -EIO;
5115                         complete(&adapter->fw_done);
5116                 }
5117                 if (!completion_done(&adapter->stats_done))
5118                         complete(&adapter->stats_done);
5119                 if (test_bit(0, &adapter->resetting))
5120                         adapter->force_reset_recovery = true;
5121                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
5122                         dev_info(dev, "Migrated, re-enabling adapter\n");
5123                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
5124                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
5125                         dev_info(dev, "Backing device failover detected\n");
5126                         adapter->failover_pending = true;
5127                 } else {
5128                         /* The adapter lost the connection */
5129                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
5130                                 gen_crq->cmd);
5131                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
5132                 }
5133                 return;
5134         case IBMVNIC_CRQ_CMD_RSP:
5135                 break;
5136         default:
5137                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
5138                         gen_crq->first);
5139                 return;
5140         }
5141
5142         switch (gen_crq->cmd) {
5143         case VERSION_EXCHANGE_RSP:
5144                 rc = crq->version_exchange_rsp.rc.code;
5145                 if (rc) {
5146                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
5147                         break;
5148                 }
5149                 ibmvnic_version =
5150                             be16_to_cpu(crq->version_exchange_rsp.version);
5151                 dev_info(dev, "Partner protocol version is %d\n",
5152                          ibmvnic_version);
5153                 send_query_cap(adapter);
5154                 break;
5155         case QUERY_CAPABILITY_RSP:
5156                 handle_query_cap_rsp(crq, adapter);
5157                 break;
5158         case QUERY_MAP_RSP:
5159                 handle_query_map_rsp(crq, adapter);
5160                 break;
5161         case REQUEST_MAP_RSP:
5162                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
5163                 complete(&adapter->fw_done);
5164                 break;
5165         case REQUEST_UNMAP_RSP:
5166                 handle_request_unmap_rsp(crq, adapter);
5167                 break;
5168         case REQUEST_CAPABILITY_RSP:
5169                 handle_request_cap_rsp(crq, adapter);
5170                 break;
5171         case LOGIN_RSP:
5172                 netdev_dbg(netdev, "Got Login Response\n");
5173                 handle_login_rsp(crq, adapter);
5174                 break;
5175         case LOGICAL_LINK_STATE_RSP:
5176                 netdev_dbg(netdev,
5177                            "Got Logical Link State Response, state: %d rc: %d\n",
5178                            crq->logical_link_state_rsp.link_state,
5179                            crq->logical_link_state_rsp.rc.code);
5180                 adapter->logical_link_state =
5181                     crq->logical_link_state_rsp.link_state;
5182                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
5183                 complete(&adapter->init_done);
5184                 break;
5185         case LINK_STATE_INDICATION:
5186                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
5187                 adapter->phys_link_state =
5188                     crq->link_state_indication.phys_link_state;
5189                 adapter->logical_link_state =
5190                     crq->link_state_indication.logical_link_state;
5191                 if (adapter->phys_link_state && adapter->logical_link_state)
5192                         netif_carrier_on(netdev);
5193                 else
5194                         netif_carrier_off(netdev);
5195                 break;
5196         case CHANGE_MAC_ADDR_RSP:
5197                 netdev_dbg(netdev, "Got MAC address change Response\n");
5198                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
5199                 break;
5200         case ERROR_INDICATION:
5201                 netdev_dbg(netdev, "Got Error Indication\n");
5202                 handle_error_indication(crq, adapter);
5203                 break;
5204         case REQUEST_STATISTICS_RSP:
5205                 netdev_dbg(netdev, "Got Statistics Response\n");
5206                 complete(&adapter->stats_done);
5207                 break;
5208         case QUERY_IP_OFFLOAD_RSP:
5209                 netdev_dbg(netdev, "Got Query IP offload Response\n");
5210                 handle_query_ip_offload_rsp(adapter);
5211                 break;
5212         case MULTICAST_CTRL_RSP:
5213                 netdev_dbg(netdev, "Got multicast control Response\n");
5214                 break;
5215         case CONTROL_IP_OFFLOAD_RSP:
5216                 netdev_dbg(netdev, "Got Control IP offload Response\n");
5217                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
5218                                  sizeof(adapter->ip_offload_ctrl),
5219                                  DMA_TO_DEVICE);
5220                 complete(&adapter->init_done);
5221                 break;
5222         case COLLECT_FW_TRACE_RSP:
5223                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
5224                 complete(&adapter->fw_done);
5225                 break;
5226         case GET_VPD_SIZE_RSP:
5227                 handle_vpd_size_rsp(crq, adapter);
5228                 break;
5229         case GET_VPD_RSP:
5230                 handle_vpd_rsp(crq, adapter);
5231                 break;
5232         case QUERY_PHYS_PARMS_RSP:
5233                 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
5234                 complete(&adapter->fw_done);
5235                 break;
5236         default:
5237                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
5238                            gen_crq->cmd);
5239         }
5240 }
5241
5242 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
5243 {
5244         struct ibmvnic_adapter *adapter = instance;
5245
5246         tasklet_schedule(&adapter->tasklet);
5247         return IRQ_HANDLED;
5248 }
5249
5250 static void ibmvnic_tasklet(struct tasklet_struct *t)
5251 {
5252         struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
5253         struct ibmvnic_crq_queue *queue = &adapter->crq;
5254         union ibmvnic_crq *crq;
5255         unsigned long flags;
5256         bool done = false;
5257
5258         spin_lock_irqsave(&queue->lock, flags);
5259         while (!done) {
5260                 /* Pull all the valid messages off the CRQ */
5261                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
5262                         /* This barrier makes sure ibmvnic_next_crq()'s
5263                          * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
5264                          * before ibmvnic_handle_crq()'s
5265                          * switch(gen_crq->first) and switch(gen_crq->cmd).
5266                          */
5267                         dma_rmb();
5268                         ibmvnic_handle_crq(crq, adapter);
5269                         crq->generic.first = 0;
5270                 }
5271
5272                 /* remain in tasklet until all
5273                  * capabilities responses are received
5274                  */
5275                 if (!adapter->wait_capability)
5276                         done = true;
5277         }
5278         /* if capabilities CRQ's were sent in this tasklet, the following
5279          * tasklet must wait until all responses are received
5280          */
5281         if (atomic_read(&adapter->running_cap_crqs) != 0)
5282                 adapter->wait_capability = true;
5283         spin_unlock_irqrestore(&queue->lock, flags);
5284 }
5285
5286 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
5287 {
5288         struct vio_dev *vdev = adapter->vdev;
5289         int rc;
5290
5291         do {
5292                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
5293         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
5294
5295         if (rc)
5296                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
5297
5298         return rc;
5299 }
5300
5301 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
5302 {
5303         struct ibmvnic_crq_queue *crq = &adapter->crq;
5304         struct device *dev = &adapter->vdev->dev;
5305         struct vio_dev *vdev = adapter->vdev;
5306         int rc;
5307
5308         /* Close the CRQ */
5309         do {
5310                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5311         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5312
5313         /* Clean out the queue */
5314         if (!crq->msgs)
5315                 return -EINVAL;
5316
5317         memset(crq->msgs, 0, PAGE_SIZE);
5318         crq->cur = 0;
5319         crq->active = false;
5320
5321         /* And re-open it again */
5322         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5323                                 crq->msg_token, PAGE_SIZE);
5324
5325         if (rc == H_CLOSED)
5326                 /* Adapter is good, but other end is not ready */
5327                 dev_warn(dev, "Partner adapter not ready\n");
5328         else if (rc != 0)
5329                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
5330
5331         return rc;
5332 }
5333
5334 static void release_crq_queue(struct ibmvnic_adapter *adapter)
5335 {
5336         struct ibmvnic_crq_queue *crq = &adapter->crq;
5337         struct vio_dev *vdev = adapter->vdev;
5338         long rc;
5339
5340         if (!crq->msgs)
5341                 return;
5342
5343         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
5344         free_irq(vdev->irq, adapter);
5345         tasklet_kill(&adapter->tasklet);
5346         do {
5347                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5348         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5349
5350         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
5351                          DMA_BIDIRECTIONAL);
5352         free_page((unsigned long)crq->msgs);
5353         crq->msgs = NULL;
5354         crq->active = false;
5355 }
5356
5357 static int init_crq_queue(struct ibmvnic_adapter *adapter)
5358 {
5359         struct ibmvnic_crq_queue *crq = &adapter->crq;
5360         struct device *dev = &adapter->vdev->dev;
5361         struct vio_dev *vdev = adapter->vdev;
5362         int rc, retrc = -ENOMEM;
5363
5364         if (crq->msgs)
5365                 return 0;
5366
5367         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
5368         /* Should we allocate more than one page? */
5369
5370         if (!crq->msgs)
5371                 return -ENOMEM;
5372
5373         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
5374         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
5375                                         DMA_BIDIRECTIONAL);
5376         if (dma_mapping_error(dev, crq->msg_token))
5377                 goto map_failed;
5378
5379         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5380                                 crq->msg_token, PAGE_SIZE);
5381
5382         if (rc == H_RESOURCE)
5383                 /* maybe kexecing and resource is busy. try a reset */
5384                 rc = ibmvnic_reset_crq(adapter);
5385         retrc = rc;
5386
5387         if (rc == H_CLOSED) {
5388                 dev_warn(dev, "Partner adapter not ready\n");
5389         } else if (rc) {
5390                 dev_warn(dev, "Error %d opening adapter\n", rc);
5391                 goto reg_crq_failed;
5392         }
5393
5394         retrc = 0;
5395
5396         tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5397
5398         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5399         snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5400                  adapter->vdev->unit_address);
5401         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5402         if (rc) {
5403                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5404                         vdev->irq, rc);
5405                 goto req_irq_failed;
5406         }
5407
5408         rc = vio_enable_interrupts(vdev);
5409         if (rc) {
5410                 dev_err(dev, "Error %d enabling interrupts\n", rc);
5411                 goto req_irq_failed;
5412         }
5413
5414         crq->cur = 0;
5415         spin_lock_init(&crq->lock);
5416
5417         return retrc;
5418
5419 req_irq_failed:
5420         tasklet_kill(&adapter->tasklet);
5421         do {
5422                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5423         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5424 reg_crq_failed:
5425         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5426 map_failed:
5427         free_page((unsigned long)crq->msgs);
5428         crq->msgs = NULL;
5429         return retrc;
5430 }
5431
5432 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5433 {
5434         struct device *dev = &adapter->vdev->dev;
5435         unsigned long timeout = msecs_to_jiffies(20000);
5436         u64 old_num_rx_queues = adapter->req_rx_queues;
5437         u64 old_num_tx_queues = adapter->req_tx_queues;
5438         int rc;
5439
5440         adapter->from_passive_init = false;
5441
5442         if (reset)
5443                 reinit_completion(&adapter->init_done);
5444
5445         adapter->init_done_rc = 0;
5446         rc = ibmvnic_send_crq_init(adapter);
5447         if (rc) {
5448                 dev_err(dev, "Send crq init failed with error %d\n", rc);
5449                 return rc;
5450         }
5451
5452         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5453                 dev_err(dev, "Initialization sequence timed out\n");
5454                 return -1;
5455         }
5456
5457         if (adapter->init_done_rc) {
5458                 release_crq_queue(adapter);
5459                 return adapter->init_done_rc;
5460         }
5461
5462         if (adapter->from_passive_init) {
5463                 adapter->state = VNIC_OPEN;
5464                 adapter->from_passive_init = false;
5465                 return -1;
5466         }
5467
5468         if (reset &&
5469             test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5470             adapter->reset_reason != VNIC_RESET_MOBILITY) {
5471                 if (adapter->req_rx_queues != old_num_rx_queues ||
5472                     adapter->req_tx_queues != old_num_tx_queues) {
5473                         release_sub_crqs(adapter, 0);
5474                         rc = init_sub_crqs(adapter);
5475                 } else {
5476                         rc = reset_sub_crq_queues(adapter);
5477                 }
5478         } else {
5479                 rc = init_sub_crqs(adapter);
5480         }
5481
5482         if (rc) {
5483                 dev_err(dev, "Initialization of sub crqs failed\n");
5484                 release_crq_queue(adapter);
5485                 return rc;
5486         }
5487
5488         rc = init_sub_crq_irqs(adapter);
5489         if (rc) {
5490                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5491                 release_crq_queue(adapter);
5492         }
5493
5494         return rc;
5495 }
5496
5497 static struct device_attribute dev_attr_failover;
5498
5499 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5500 {
5501         struct ibmvnic_adapter *adapter;
5502         struct net_device *netdev;
5503         unsigned char *mac_addr_p;
5504         bool init_success;
5505         int rc;
5506
5507         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5508                 dev->unit_address);
5509
5510         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5511                                                         VETH_MAC_ADDR, NULL);
5512         if (!mac_addr_p) {
5513                 dev_err(&dev->dev,
5514                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5515                         __FILE__, __LINE__);
5516                 return 0;
5517         }
5518
5519         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5520                                    IBMVNIC_MAX_QUEUES);
5521         if (!netdev)
5522                 return -ENOMEM;
5523
5524         adapter = netdev_priv(netdev);
5525         adapter->state = VNIC_PROBING;
5526         dev_set_drvdata(&dev->dev, netdev);
5527         adapter->vdev = dev;
5528         adapter->netdev = netdev;
5529         adapter->login_pending = false;
5530
5531         ether_addr_copy(adapter->mac_addr, mac_addr_p);
5532         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5533         netdev->irq = dev->irq;
5534         netdev->netdev_ops = &ibmvnic_netdev_ops;
5535         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5536         SET_NETDEV_DEV(netdev, &dev->dev);
5537
5538         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5539         INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5540                           __ibmvnic_delayed_reset);
5541         INIT_LIST_HEAD(&adapter->rwi_list);
5542         spin_lock_init(&adapter->rwi_lock);
5543         spin_lock_init(&adapter->state_lock);
5544         mutex_init(&adapter->fw_lock);
5545         init_completion(&adapter->init_done);
5546         init_completion(&adapter->fw_done);
5547         init_completion(&adapter->reset_done);
5548         init_completion(&adapter->stats_done);
5549         clear_bit(0, &adapter->resetting);
5550
5551         init_success = false;
5552         do {
5553                 rc = init_crq_queue(adapter);
5554                 if (rc) {
5555                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5556                                 rc);
5557                         goto ibmvnic_init_fail;
5558                 }
5559
5560                 rc = ibmvnic_reset_init(adapter, false);
5561         } while (rc == EAGAIN);
5562
5563         /* We are ignoring the error from ibmvnic_reset_init() assuming that the
5564          * partner is not ready. CRQ is not active. When the partner becomes
5565          * ready, we will do the passive init reset.
5566          */
5567
5568         if (!rc)
5569                 init_success = true;
5570
5571         rc = init_stats_buffers(adapter);
5572         if (rc)
5573                 goto ibmvnic_init_fail;
5574
5575         rc = init_stats_token(adapter);
5576         if (rc)
5577                 goto ibmvnic_stats_fail;
5578
5579         rc = device_create_file(&dev->dev, &dev_attr_failover);
5580         if (rc)
5581                 goto ibmvnic_dev_file_err;
5582
5583         netif_carrier_off(netdev);
5584         rc = register_netdev(netdev);
5585         if (rc) {
5586                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5587                 goto ibmvnic_register_fail;
5588         }
5589         dev_info(&dev->dev, "ibmvnic registered\n");
5590
5591         if (init_success) {
5592                 adapter->state = VNIC_PROBED;
5593                 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5594                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5595                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5596         } else {
5597                 adapter->state = VNIC_DOWN;
5598         }
5599
5600         adapter->wait_for_reset = false;
5601         adapter->last_reset_time = jiffies;
5602         return 0;
5603
5604 ibmvnic_register_fail:
5605         device_remove_file(&dev->dev, &dev_attr_failover);
5606
5607 ibmvnic_dev_file_err:
5608         release_stats_token(adapter);
5609
5610 ibmvnic_stats_fail:
5611         release_stats_buffers(adapter);
5612
5613 ibmvnic_init_fail:
5614         release_sub_crqs(adapter, 1);
5615         release_crq_queue(adapter);
5616         mutex_destroy(&adapter->fw_lock);
5617         free_netdev(netdev);
5618
5619         return rc;
5620 }
5621
5622 static void ibmvnic_remove(struct vio_dev *dev)
5623 {
5624         struct net_device *netdev = dev_get_drvdata(&dev->dev);
5625         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5626         unsigned long flags;
5627
5628         spin_lock_irqsave(&adapter->state_lock, flags);
5629
5630         /* If ibmvnic_reset() is scheduling a reset, wait for it to
5631          * finish. Then, set the state to REMOVING to prevent it from
5632          * scheduling any more work and to have reset functions ignore
5633          * any resets that have already been scheduled. Drop the lock
5634          * after setting state, so __ibmvnic_reset() which is called
5635          * from the flush_work() below, can make progress.
5636          */
5637         spin_lock(&adapter->rwi_lock);
5638         adapter->state = VNIC_REMOVING;
5639         spin_unlock(&adapter->rwi_lock);
5640
5641         spin_unlock_irqrestore(&adapter->state_lock, flags);
5642
5643         flush_work(&adapter->ibmvnic_reset);
5644         flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5645
5646         rtnl_lock();
5647         unregister_netdevice(netdev);
5648
5649         release_resources(adapter);
5650         release_sub_crqs(adapter, 1);
5651         release_crq_queue(adapter);
5652
5653         release_stats_token(adapter);
5654         release_stats_buffers(adapter);
5655
5656         adapter->state = VNIC_REMOVED;
5657
5658         rtnl_unlock();
5659         mutex_destroy(&adapter->fw_lock);
5660         device_remove_file(&dev->dev, &dev_attr_failover);
5661         free_netdev(netdev);
5662         dev_set_drvdata(&dev->dev, NULL);
5663 }
5664
5665 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5666                               const char *buf, size_t count)
5667 {
5668         struct net_device *netdev = dev_get_drvdata(dev);
5669         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5670         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5671         __be64 session_token;
5672         long rc;
5673
5674         if (!sysfs_streq(buf, "1"))
5675                 return -EINVAL;
5676
5677         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5678                          H_GET_SESSION_TOKEN, 0, 0, 0);
5679         if (rc) {
5680                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5681                            rc);
5682                 goto last_resort;
5683         }
5684
5685         session_token = (__be64)retbuf[0];
5686         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5687                    be64_to_cpu(session_token));
5688         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5689                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5690         if (rc)
5691                 netdev_err(netdev,
5692                            "H_VIOCTL initiated failover failed, rc %ld\n",
5693                            rc);
5694
5695 last_resort:
5696         netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n");
5697         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
5698
5699         return count;
5700 }
5701 static DEVICE_ATTR_WO(failover);
5702
5703 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5704 {
5705         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5706         struct ibmvnic_adapter *adapter;
5707         struct iommu_table *tbl;
5708         unsigned long ret = 0;
5709         int i;
5710
5711         tbl = get_iommu_table_base(&vdev->dev);
5712
5713         /* netdev inits at probe time along with the structures we need below*/
5714         if (!netdev)
5715                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5716
5717         adapter = netdev_priv(netdev);
5718
5719         ret += PAGE_SIZE; /* the crq message queue */
5720         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5721
5722         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5723                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5724
5725         for (i = 0; i < adapter->num_active_rx_pools; i++)
5726                 ret += adapter->rx_pool[i].size *
5727                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5728
5729         return ret;
5730 }
5731
5732 static int ibmvnic_resume(struct device *dev)
5733 {
5734         struct net_device *netdev = dev_get_drvdata(dev);
5735         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5736
5737         if (adapter->state != VNIC_OPEN)
5738                 return 0;
5739
5740         tasklet_schedule(&adapter->tasklet);
5741
5742         return 0;
5743 }
5744
5745 static const struct vio_device_id ibmvnic_device_table[] = {
5746         {"network", "IBM,vnic"},
5747         {"", "" }
5748 };
5749 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5750
5751 static const struct dev_pm_ops ibmvnic_pm_ops = {
5752         .resume = ibmvnic_resume
5753 };
5754
5755 static struct vio_driver ibmvnic_driver = {
5756         .id_table       = ibmvnic_device_table,
5757         .probe          = ibmvnic_probe,
5758         .remove         = ibmvnic_remove,
5759         .get_desired_dma = ibmvnic_get_desired_dma,
5760         .name           = ibmvnic_driver_name,
5761         .pm             = &ibmvnic_pm_ops,
5762 };
5763
5764 /* module functions */
5765 static int __init ibmvnic_module_init(void)
5766 {
5767         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5768                 IBMVNIC_DRIVER_VERSION);
5769
5770         return vio_register_driver(&ibmvnic_driver);
5771 }
5772
5773 static void __exit ibmvnic_module_exit(void)
5774 {
5775         vio_unregister_driver(&ibmvnic_driver);
5776 }
5777
5778 module_init(ibmvnic_module_init);
5779 module_exit(ibmvnic_module_exit);