drivers/net/ethernet/qlogic/qed/qed_ll2.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 /* QLogic qed NIC Driver
   3  * Copyright (c) 2015-2017  QLogic Corporation
   4  * Copyright (c) 2019-2020 Marvell International Ltd.
   5  */
   6
   7 #include <linux/types.h>
   8 #include <asm/byteorder.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/if_vlan.h>
  11 #include <linux/kernel.h>
  12 #include <linux/pci.h>
  13 #include <linux/slab.h>
  14 #include <linux/stddef.h>
  15 #include <linux/workqueue.h>
  16 #include <net/ipv6.h>
  17 #include <linux/bitops.h>
  18 #include <linux/delay.h>
  19 #include <linux/errno.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/io.h>
  22 #include <linux/list.h>
  23 #include <linux/mutex.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/string.h>
  26 #include <linux/qed/qed_ll2_if.h>
  27 #include "qed.h"
  28 #include "qed_cxt.h"
  29 #include "qed_dev_api.h"
  30 #include "qed_hsi.h"
  31 #include "qed_iro_hsi.h"
  32 #include "qed_hw.h"
  33 #include "qed_int.h"
  34 #include "qed_ll2.h"
  35 #include "qed_mcp.h"
  36 #include "qed_ooo.h"
  37 #include "qed_reg_addr.h"
  38 #include "qed_sp.h"
  39 #include "qed_rdma.h"
  40
  41 #define QED_LL2_RX_REGISTERED(ll2)      ((ll2)->rx_queue.b_cb_registered)
  42 #define QED_LL2_TX_REGISTERED(ll2)      ((ll2)->tx_queue.b_cb_registered)
  43
  44 #define QED_LL2_TX_SIZE (256)
  45 #define QED_LL2_RX_SIZE (4096)
  46
  47 #define QED_LL2_INVALID_STATS_ID        0xff
  48
  49 struct qed_cb_ll2_info {
  50         int rx_cnt;
  51         u32 rx_size;
  52         u8 handle;
  53
  54         /* Lock protecting LL2 buffer lists in sleepless context */
  55         spinlock_t lock;
  56         struct list_head list;
  57
  58         const struct qed_ll2_cb_ops *cbs;
  59         void *cb_cookie;
  60 };
  61
  62 struct qed_ll2_buffer {
  63         struct list_head list;
  64         void *data;
  65         dma_addr_t phys_addr;
  66 };
  67
  68 static u8 qed_ll2_handle_to_stats_id(struct qed_hwfn *p_hwfn,
  69                                      u8 ll2_queue_type, u8 qid)
  70 {
  71         u8 stats_id;
  72
  73         /* For legacy (RAM based) queues, the stats_id will be set as the
  74          * queue_id. Otherwise (context based queue), it will be set to
  75          * the "abs_pf_id" offset from the end of the RAM based queue IDs.
  76          * If the final value exceeds the total counters amount, return
  77          * INVALID value to indicate that the stats for this connection should
  78          * be disabled.
  79          */
  80         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
  81                 stats_id = qid;
  82         else
  83                 stats_id = MAX_NUM_LL2_RX_RAM_QUEUES + p_hwfn->abs_pf_id;
  84
  85         if (stats_id < MAX_NUM_LL2_TX_STATS_COUNTERS)
  86                 return stats_id;
  87         else
  88                 return QED_LL2_INVALID_STATS_ID;
  89 }
  90
  91 static void qed_ll2b_complete_tx_packet(void *cxt,
  92                                         u8 connection_handle,
  93                                         void *cookie,
  94                                         dma_addr_t first_frag_addr,
  95                                         bool b_last_fragment,
  96                                         bool b_last_packet)
  97 {
  98         struct qed_hwfn *p_hwfn = cxt;
  99         struct qed_dev *cdev = p_hwfn->cdev;
 100         struct sk_buff *skb = cookie;
 101
 102         /* All we need to do is release the mapping */
 103         dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
 104                          skb_headlen(skb), DMA_TO_DEVICE);
 105
 106         if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
 107                 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
 108                                       b_last_fragment);
 109
 110         dev_kfree_skb_any(skb);
 111 }
 112
 113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
 114                                 u8 **data, dma_addr_t *phys_addr)
 115 {
 116         *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
 117         if (!(*data)) {
 118                 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
 119                 return -ENOMEM;
 120         }
 121
 122         *phys_addr = dma_map_single(&cdev->pdev->dev,
 123                                     ((*data) + NET_SKB_PAD),
 124                                     cdev->ll2->rx_size, DMA_FROM_DEVICE);
 125         if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
 126                 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
 127                 kfree((*data));
 128                 return -ENOMEM;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
 135                                   struct qed_ll2_buffer *buffer)
 136 {
 137         spin_lock_bh(&cdev->ll2->lock);
 138
 139         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 140                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 141         kfree(buffer->data);
 142         list_del(&buffer->list);
 143
 144         cdev->ll2->rx_cnt--;
 145         if (!cdev->ll2->rx_cnt)
 146                 DP_INFO(cdev, "All LL2 entries were removed\n");
 147
 148         spin_unlock_bh(&cdev->ll2->lock);
 149
 150         return 0;
 151 }
 152
 153 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
 154 {
 155         struct qed_ll2_buffer *buffer, *tmp_buffer;
 156
 157         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
 158                 qed_ll2_dealloc_buffer(cdev, buffer);
 159 }
 160
 161 static void qed_ll2b_complete_rx_packet(void *cxt,
 162                                         struct qed_ll2_comp_rx_data *data)
 163 {
 164         struct qed_hwfn *p_hwfn = cxt;
 165         struct qed_ll2_buffer *buffer = data->cookie;
 166         struct qed_dev *cdev = p_hwfn->cdev;
 167         dma_addr_t new_phys_addr;
 168         struct sk_buff *skb;
 169         bool reuse = false;
 170         int rc = -EINVAL;
 171         u8 *new_data;
 172
 173         DP_VERBOSE(p_hwfn,
 174                    (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
 175                    "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
 176                    (u64)data->rx_buf_addr,
 177                    data->u.placement_offset,
 178                    data->length.packet_length,
 179                    data->parse_flags,
 180                    data->vlan, data->opaque_data_0, data->opaque_data_1);
 181
 182         if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
 183                 print_hex_dump(KERN_INFO, "",
 184                                DUMP_PREFIX_OFFSET, 16, 1,
 185                                buffer->data, data->length.packet_length, false);
 186         }
 187
 188         /* Determine if data is valid */
 189         if (data->length.packet_length < ETH_HLEN)
 190                 reuse = true;
 191
 192         /* Allocate a replacement for buffer; Reuse upon failure */
 193         if (!reuse)
 194                 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
 195                                           &new_phys_addr);
 196
 197         /* If need to reuse or there's no replacement buffer, repost this */
 198         if (rc)
 199                 goto out_post;
 200         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
 201                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
 202
 203         skb = slab_build_skb(buffer->data);
 204         if (!skb) {
 205                 DP_INFO(cdev, "Failed to build SKB\n");
 206                 kfree(buffer->data);
 207                 goto out_post1;
 208         }
 209
 210         data->u.placement_offset += NET_SKB_PAD;
 211         skb_reserve(skb, data->u.placement_offset);
 212         skb_put(skb, data->length.packet_length);
 213         skb_checksum_none_assert(skb);
 214
 215         /* Get parital ethernet information instead of eth_type_trans(),
 216          * Since we don't have an associated net_device.
 217          */
 218         skb_reset_mac_header(skb);
 219         skb->protocol = eth_hdr(skb)->h_proto;
 220
 221         /* Pass SKB onward */
 222         if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
 223                 if (data->vlan)
 224                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 225                                                data->vlan);
 226                 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
 227                                       data->opaque_data_0,
 228                                       data->opaque_data_1);
 229         } else {
 230                 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
 231                                     QED_MSG_LL2 | QED_MSG_STORAGE),
 232                            "Dropping the packet\n");
 233                 kfree(buffer->data);
 234         }
 235
 236 out_post1:
 237         /* Update Buffer information and update FW producer */
 238         buffer->data = new_data;
 239         buffer->phys_addr = new_phys_addr;
 240
 241 out_post:
 242         rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle,
 243                                     buffer->phys_addr, 0, buffer, 1);
 244         if (rc)
 245                 qed_ll2_dealloc_buffer(cdev, buffer);
 246 }
 247
 248 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 249                                                     u8 connection_handle,
 250                                                     bool b_lock,
 251                                                     bool b_only_active)
 252 {
 253         struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
 254
 255         if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
 256                 return NULL;
 257
 258         if (!p_hwfn->p_ll2_info)
 259                 return NULL;
 260
 261         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
 262
 263         if (b_only_active) {
 264                 if (b_lock)
 265                         mutex_lock(&p_ll2_conn->mutex);
 266                 if (p_ll2_conn->b_active)
 267                         p_ret = p_ll2_conn;
 268                 if (b_lock)
 269                         mutex_unlock(&p_ll2_conn->mutex);
 270         } else {
 271                 p_ret = p_ll2_conn;
 272         }
 273
 274         return p_ret;
 275 }
 276
 277 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
 278                                                   u8 connection_handle)
 279 {
 280         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
 281 }
 282
 283 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
 284                                                        u8 connection_handle)
 285 {
 286         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
 287 }
 288
 289 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
 290                                                            *p_hwfn,
 291                                                            u8 connection_handle)
 292 {
 293         return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
 294 }
 295
 296 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 297 {
 298         bool b_last_packet = false, b_last_frag = false;
 299         struct qed_ll2_tx_packet *p_pkt = NULL;
 300         struct qed_ll2_info *p_ll2_conn;
 301         struct qed_ll2_tx_queue *p_tx;
 302         unsigned long flags = 0;
 303         dma_addr_t tx_frag;
 304
 305         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 306         if (!p_ll2_conn)
 307                 return;
 308
 309         p_tx = &p_ll2_conn->tx_queue;
 310
 311         spin_lock_irqsave(&p_tx->lock, flags);
 312         while (!list_empty(&p_tx->active_descq)) {
 313                 p_pkt = list_first_entry(&p_tx->active_descq,
 314                                          struct qed_ll2_tx_packet, list_entry);
 315                 if (!p_pkt)
 316                         break;
 317
 318                 list_del(&p_pkt->list_entry);
 319                 b_last_packet = list_empty(&p_tx->active_descq);
 320                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 321                 spin_unlock_irqrestore(&p_tx->lock, flags);
 322                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 323                         struct qed_ooo_buffer *p_buffer;
 324
 325                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 326                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 327                                                 p_buffer);
 328                 } else {
 329                         p_tx->cur_completing_packet = *p_pkt;
 330                         p_tx->cur_completing_bd_idx = 1;
 331                         b_last_frag =
 332                                 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 333                         tx_frag = p_pkt->bds_set[0].tx_frag;
 334                         p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
 335                                                       p_ll2_conn->my_id,
 336                                                       p_pkt->cookie,
 337                                                       tx_frag,
 338                                                       b_last_frag,
 339                                                       b_last_packet);
 340                 }
 341                 spin_lock_irqsave(&p_tx->lock, flags);
 342         }
 343         spin_unlock_irqrestore(&p_tx->lock, flags);
 344 }
 345
 346 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 347 {
 348         struct qed_ll2_info *p_ll2_conn = p_cookie;
 349         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 350         u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
 351         struct qed_ll2_tx_packet *p_pkt;
 352         bool b_last_frag = false;
 353         unsigned long flags;
 354         int rc = -EINVAL;
 355
 356         if (!p_ll2_conn)
 357                 return rc;
 358
 359         spin_lock_irqsave(&p_tx->lock, flags);
 360         if (p_tx->b_completing_packet) {
 361                 rc = -EBUSY;
 362                 goto out;
 363         }
 364
 365         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 366         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 367         while (num_bds) {
 368                 if (list_empty(&p_tx->active_descq))
 369                         goto out;
 370
 371                 p_pkt = list_first_entry(&p_tx->active_descq,
 372                                          struct qed_ll2_tx_packet, list_entry);
 373                 if (!p_pkt)
 374                         goto out;
 375
 376                 p_tx->b_completing_packet = true;
 377                 p_tx->cur_completing_packet = *p_pkt;
 378                 num_bds_in_packet = p_pkt->bd_used;
 379                 list_del(&p_pkt->list_entry);
 380
 381                 if (unlikely(num_bds < num_bds_in_packet)) {
 382                         DP_NOTICE(p_hwfn,
 383                                   "Rest of BDs does not cover whole packet\n");
 384                         goto out;
 385                 }
 386
 387                 num_bds -= num_bds_in_packet;
 388                 p_tx->bds_idx += num_bds_in_packet;
 389                 while (num_bds_in_packet--)
 390                         qed_chain_consume(&p_tx->txq_chain);
 391
 392                 p_tx->cur_completing_bd_idx = 1;
 393                 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
 394                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 395
 396                 spin_unlock_irqrestore(&p_tx->lock, flags);
 397
 398                 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
 399                                            p_ll2_conn->my_id,
 400                                            p_pkt->cookie,
 401                                            p_pkt->bds_set[0].tx_frag,
 402                                            b_last_frag, !num_bds);
 403
 404                 spin_lock_irqsave(&p_tx->lock, flags);
 405         }
 406
 407         p_tx->b_completing_packet = false;
 408         rc = 0;
 409 out:
 410         spin_unlock_irqrestore(&p_tx->lock, flags);
 411         return rc;
 412 }
 413
 414 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
 415                                   union core_rx_cqe_union *p_cqe,
 416                                   struct qed_ll2_comp_rx_data *data)
 417 {
 418         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
 419         data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
 420         data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
 421         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
 422         data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
 423         data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
 424         data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
 425
 426         data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
 427 }
 428
 429 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
 430                                   union core_rx_cqe_union *p_cqe,
 431                                   struct qed_ll2_comp_rx_data *data)
 432 {
 433         data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
 434         data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
 435         data->length.packet_length =
 436             le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
 437         data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
 438         data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
 439         data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
 440         data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
 441 }
 442
 443 static int
 444 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
 445                         struct qed_ll2_info *p_ll2_conn,
 446                         union core_rx_cqe_union *p_cqe,
 447                         unsigned long *p_lock_flags)
 448 {
 449         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 450         struct core_rx_slow_path_cqe *sp_cqe;
 451
 452         sp_cqe = &p_cqe->rx_cqe_sp;
 453         if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
 454                 DP_NOTICE(p_hwfn,
 455                           "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
 456                           sp_cqe->ramrod_cmd_id);
 457                 return -EINVAL;
 458         }
 459
 460         if (!p_ll2_conn->cbs.slowpath_cb) {
 461                 DP_NOTICE(p_hwfn,
 462                           "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
 463                 return -EINVAL;
 464         }
 465
 466         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 467
 468         p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
 469                                     p_ll2_conn->my_id,
 470                                     le32_to_cpu(sp_cqe->opaque_data.data[0]),
 471                                     le32_to_cpu(sp_cqe->opaque_data.data[1]));
 472
 473         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 474
 475         return 0;
 476 }
 477
 478 static int
 479 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
 480                               struct qed_ll2_info *p_ll2_conn,
 481                               union core_rx_cqe_union *p_cqe,
 482                               unsigned long *p_lock_flags, bool b_last_cqe)
 483 {
 484         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 485         struct qed_ll2_rx_packet *p_pkt = NULL;
 486         struct qed_ll2_comp_rx_data data;
 487
 488         if (!list_empty(&p_rx->active_descq))
 489                 p_pkt = list_first_entry(&p_rx->active_descq,
 490                                          struct qed_ll2_rx_packet, list_entry);
 491         if (unlikely(!p_pkt)) {
 492                 DP_NOTICE(p_hwfn,
 493                           "[%d] LL2 Rx completion but active_descq is empty\n",
 494                           p_ll2_conn->input.conn_type);
 495
 496                 return -EIO;
 497         }
 498         list_del(&p_pkt->list_entry);
 499
 500         if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
 501                 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
 502         else
 503                 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
 504         if (unlikely(qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd))
 505                 DP_NOTICE(p_hwfn,
 506                           "Mismatch between active_descq and the LL2 Rx chain\n");
 507
 508         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 509
 510         data.connection_handle = p_ll2_conn->my_id;
 511         data.cookie = p_pkt->cookie;
 512         data.rx_buf_addr = p_pkt->rx_buf_addr;
 513         data.b_last_packet = b_last_cqe;
 514
 515         spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
 516         p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
 517
 518         spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
 519
 520         return 0;
 521 }
 522
 523 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 524 {
 525         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
 526         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 527         union core_rx_cqe_union *cqe = NULL;
 528         u16 cq_new_idx = 0, cq_old_idx = 0;
 529         unsigned long flags = 0;
 530         int rc = 0;
 531
 532         if (!p_ll2_conn)
 533                 return rc;
 534
 535         spin_lock_irqsave(&p_rx->lock, flags);
 536
 537         if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) {
 538                 spin_unlock_irqrestore(&p_rx->lock, flags);
 539                 return 0;
 540         }
 541
 542         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 543         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 544
 545         while (cq_new_idx != cq_old_idx) {
 546                 bool b_last_cqe = (cq_new_idx == cq_old_idx);
 547
 548                 cqe =
 549                     (union core_rx_cqe_union *)
 550                     qed_chain_consume(&p_rx->rcq_chain);
 551                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 552
 553                 DP_VERBOSE(p_hwfn,
 554                            QED_MSG_LL2,
 555                            "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
 556                            cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
 557
 558                 switch (cqe->rx_cqe_sp.type) {
 559                 case CORE_RX_CQE_TYPE_SLOW_PATH:
 560                         rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
 561                                                      cqe, &flags);
 562                         break;
 563                 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
 564                 case CORE_RX_CQE_TYPE_REGULAR:
 565                         rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
 566                                                            cqe, &flags,
 567                                                            b_last_cqe);
 568                         break;
 569                 default:
 570                         rc = -EIO;
 571                 }
 572         }
 573
 574         spin_unlock_irqrestore(&p_rx->lock, flags);
 575         return rc;
 576 }
 577
 578 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 579 {
 580         struct qed_ll2_info *p_ll2_conn = NULL;
 581         struct qed_ll2_rx_packet *p_pkt = NULL;
 582         struct qed_ll2_rx_queue *p_rx;
 583         unsigned long flags = 0;
 584
 585         p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
 586         if (!p_ll2_conn)
 587                 return;
 588
 589         p_rx = &p_ll2_conn->rx_queue;
 590
 591         spin_lock_irqsave(&p_rx->lock, flags);
 592         while (!list_empty(&p_rx->active_descq)) {
 593                 p_pkt = list_first_entry(&p_rx->active_descq,
 594                                          struct qed_ll2_rx_packet, list_entry);
 595                 if (!p_pkt)
 596                         break;
 597                 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
 598                 spin_unlock_irqrestore(&p_rx->lock, flags);
 599
 600                 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
 601                         struct qed_ooo_buffer *p_buffer;
 602
 603                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 604                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 605                                                 p_buffer);
 606                 } else {
 607                         dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
 608                         void *cookie = p_pkt->cookie;
 609                         bool b_last;
 610
 611                         b_last = list_empty(&p_rx->active_descq);
 612                         p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
 613                                                       p_ll2_conn->my_id,
 614                                                       cookie,
 615                                                       rx_buf_addr, b_last);
 616                 }
 617                 spin_lock_irqsave(&p_rx->lock, flags);
 618         }
 619         spin_unlock_irqrestore(&p_rx->lock, flags);
 620 }
 621
 622 static bool
 623 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
 624                                 struct core_rx_slow_path_cqe *p_cqe)
 625 {
 626         struct ooo_opaque *ooo_opq;
 627         u32 cid;
 628
 629         if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
 630                 return false;
 631
 632         ooo_opq = (struct ooo_opaque *)&p_cqe->opaque_data;
 633         if (ooo_opq->ooo_opcode != TCP_EVENT_DELETE_ISLES)
 634                 return false;
 635
 636         /* Need to make a flush */
 637         cid = le32_to_cpu(ooo_opq->cid);
 638         qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
 639
 640         return true;
 641 }
 642
 643 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 644                                   struct qed_ll2_info *p_ll2_conn)
 645 {
 646         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 647         u16 packet_length = 0, parse_flags = 0, vlan = 0;
 648         struct qed_ll2_rx_packet *p_pkt = NULL;
 649         union core_rx_cqe_union *cqe = NULL;
 650         u16 cq_new_idx = 0, cq_old_idx = 0;
 651         struct qed_ooo_buffer *p_buffer;
 652         struct ooo_opaque *ooo_opq;
 653         u8 placement_offset = 0;
 654         u8 cqe_type;
 655         u32 cid;
 656
 657         cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
 658         cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 659         if (cq_new_idx == cq_old_idx)
 660                 return 0;
 661
 662         while (cq_new_idx != cq_old_idx) {
 663                 struct core_rx_fast_path_cqe *p_cqe_fp;
 664
 665                 cqe = qed_chain_consume(&p_rx->rcq_chain);
 666                 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 667                 cqe_type = cqe->rx_cqe_sp.type;
 668
 669                 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
 670                         if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
 671                                                             &cqe->rx_cqe_sp))
 672                                 continue;
 673
 674                 if (unlikely(cqe_type != CORE_RX_CQE_TYPE_REGULAR)) {
 675                         DP_NOTICE(p_hwfn,
 676                                   "Got a non-regular LB LL2 completion [type 0x%02x]\n",
 677                                   cqe_type);
 678                         return -EINVAL;
 679                 }
 680                 p_cqe_fp = &cqe->rx_cqe_fp;
 681
 682                 placement_offset = p_cqe_fp->placement_offset;
 683                 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
 684                 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
 685                 vlan = le16_to_cpu(p_cqe_fp->vlan);
 686                 ooo_opq = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
 687                 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, ooo_opq);
 688                 cid = le32_to_cpu(ooo_opq->cid);
 689
 690                 /* Process delete isle first */
 691                 if (ooo_opq->drop_size)
 692                         qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
 693                                              ooo_opq->drop_isle,
 694                                              ooo_opq->drop_size);
 695
 696                 if (ooo_opq->ooo_opcode == TCP_EVENT_NOP)
 697                         continue;
 698
 699                 /* Now process create/add/join isles */
 700                 if (unlikely(list_empty(&p_rx->active_descq))) {
 701                         DP_NOTICE(p_hwfn,
 702                                   "LL2 OOO RX chain has no submitted buffers\n"
 703                                   );
 704                         return -EIO;
 705                 }
 706
 707                 p_pkt = list_first_entry(&p_rx->active_descq,
 708                                          struct qed_ll2_rx_packet, list_entry);
 709
 710                 if (likely(ooo_opq->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE ||
 711                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT ||
 712                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT ||
 713                            ooo_opq->ooo_opcode == TCP_EVENT_ADD_PEN ||
 714                            ooo_opq->ooo_opcode == TCP_EVENT_JOIN)) {
 715                         if (unlikely(!p_pkt)) {
 716                                 DP_NOTICE(p_hwfn,
 717                                           "LL2 OOO RX packet is not valid\n");
 718                                 return -EIO;
 719                         }
 720                         list_del(&p_pkt->list_entry);
 721                         p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 722                         p_buffer->packet_length = packet_length;
 723                         p_buffer->parse_flags = parse_flags;
 724                         p_buffer->vlan = vlan;
 725                         p_buffer->placement_offset = placement_offset;
 726                         qed_chain_consume(&p_rx->rxq_chain);
 727                         list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
 728
 729                         switch (ooo_opq->ooo_opcode) {
 730                         case TCP_EVENT_ADD_NEW_ISLE:
 731                                 qed_ooo_add_new_isle(p_hwfn,
 732                                                      p_hwfn->p_ooo_info,
 733                                                      cid,
 734                                                      ooo_opq->ooo_isle,
 735                                                      p_buffer);
 736                                 break;
 737                         case TCP_EVENT_ADD_ISLE_RIGHT:
 738                                 qed_ooo_add_new_buffer(p_hwfn,
 739                                                        p_hwfn->p_ooo_info,
 740                                                        cid,
 741                                                        ooo_opq->ooo_isle,
 742                                                        p_buffer,
 743                                                        QED_OOO_RIGHT_BUF);
 744                                 break;
 745                         case TCP_EVENT_ADD_ISLE_LEFT:
 746                                 qed_ooo_add_new_buffer(p_hwfn,
 747                                                        p_hwfn->p_ooo_info,
 748                                                        cid,
 749                                                        ooo_opq->ooo_isle,
 750                                                        p_buffer,
 751                                                        QED_OOO_LEFT_BUF);
 752                                 break;
 753                         case TCP_EVENT_JOIN:
 754                                 qed_ooo_add_new_buffer(p_hwfn,
 755                                                        p_hwfn->p_ooo_info,
 756                                                        cid,
 757                                                        ooo_opq->ooo_isle + 1,
 758                                                        p_buffer,
 759                                                        QED_OOO_LEFT_BUF);
 760                                 qed_ooo_join_isles(p_hwfn,
 761                                                    p_hwfn->p_ooo_info,
 762                                                    cid, ooo_opq->ooo_isle);
 763                                 break;
 764                         case TCP_EVENT_ADD_PEN:
 765                                 qed_ooo_put_ready_buffer(p_hwfn,
 766                                                          p_hwfn->p_ooo_info,
 767                                                          p_buffer, true);
 768                                 break;
 769                         }
 770                 } else {
 771                         DP_NOTICE(p_hwfn,
 772                                   "Unexpected event (%d) TX OOO completion\n",
 773                                   ooo_opq->ooo_opcode);
 774                 }
 775         }
 776
 777         return 0;
 778 }
 779
 780 static void
 781 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
 782                           struct qed_ll2_info *p_ll2_conn)
 783 {
 784         struct qed_ll2_tx_pkt_info tx_pkt;
 785         struct qed_ooo_buffer *p_buffer;
 786         u16 l4_hdr_offset_w;
 787         dma_addr_t first_frag;
 788         u8 bd_flags;
 789         int rc;
 790
 791         /* Submit Tx buffers here */
 792         while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
 793                                                     p_hwfn->p_ooo_info))) {
 794                 l4_hdr_offset_w = 0;
 795                 bd_flags = 0;
 796
 797                 first_frag = p_buffer->rx_buffer_phys_addr +
 798                              p_buffer->placement_offset;
 799                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
 800                 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
 801
 802                 memset(&tx_pkt, 0, sizeof(tx_pkt));
 803                 tx_pkt.num_of_bds = 1;
 804                 tx_pkt.vlan = p_buffer->vlan;
 805                 tx_pkt.bd_flags = bd_flags;
 806                 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
 807                 switch (p_ll2_conn->tx_dest) {
 808                 case CORE_TX_DEST_NW:
 809                         tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
 810                         break;
 811                 case CORE_TX_DEST_LB:
 812                         tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
 813                         break;
 814                 case CORE_TX_DEST_DROP:
 815                 default:
 816                         tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
 817                         break;
 818                 }
 819                 tx_pkt.first_frag = first_frag;
 820                 tx_pkt.first_frag_len = p_buffer->packet_length;
 821                 tx_pkt.cookie = p_buffer;
 822
 823                 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
 824                                                &tx_pkt, true);
 825                 if (rc) {
 826                         qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
 827                                                  p_buffer, false);
 828                         break;
 829                 }
 830         }
 831 }
 832
 833 static void
 834 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
 835                           struct qed_ll2_info *p_ll2_conn)
 836 {
 837         struct qed_ooo_buffer *p_buffer;
 838         int rc;
 839
 840         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
 841                                                    p_hwfn->p_ooo_info))) {
 842                 rc = qed_ll2_post_rx_buffer(p_hwfn,
 843                                             p_ll2_conn->my_id,
 844                                             p_buffer->rx_buffer_phys_addr,
 845                                             0, p_buffer, true);
 846                 if (rc) {
 847                         qed_ooo_put_free_buffer(p_hwfn,
 848                                                 p_hwfn->p_ooo_info, p_buffer);
 849                         break;
 850                 }
 851         }
 852 }
 853
 854 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 855 {
 856         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 857         int rc;
 858
 859         if (!p_ll2_conn)
 860                 return 0;
 861
 862         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
 863                 return 0;
 864
 865         rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
 866         if (rc)
 867                 return rc;
 868
 869         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
 870         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 871
 872         return 0;
 873 }
 874
 875 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
 876 {
 877         struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
 878         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
 879         struct qed_ll2_tx_packet *p_pkt = NULL;
 880         struct qed_ooo_buffer *p_buffer;
 881         bool b_dont_submit_rx = false;
 882         u16 new_idx = 0, num_bds = 0;
 883         int rc;
 884
 885         if (unlikely(!p_ll2_conn))
 886                 return 0;
 887
 888         if (unlikely(!QED_LL2_TX_REGISTERED(p_ll2_conn)))
 889                 return 0;
 890
 891         new_idx = le16_to_cpu(*p_tx->p_fw_cons);
 892         num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
 893
 894         if (unlikely(!num_bds))
 895                 return 0;
 896
 897         while (num_bds) {
 898                 if (list_empty(&p_tx->active_descq))
 899                         return -EINVAL;
 900
 901                 p_pkt = list_first_entry(&p_tx->active_descq,
 902                                          struct qed_ll2_tx_packet, list_entry);
 903                 if (unlikely(!p_pkt))
 904                         return -EINVAL;
 905
 906                 if (unlikely(p_pkt->bd_used != 1)) {
 907                         DP_NOTICE(p_hwfn,
 908                                   "Unexpectedly many BDs(%d) in TX OOO completion\n",
 909                                   p_pkt->bd_used);
 910                         return -EINVAL;
 911                 }
 912
 913                 list_del(&p_pkt->list_entry);
 914
 915                 num_bds--;
 916                 p_tx->bds_idx++;
 917                 qed_chain_consume(&p_tx->txq_chain);
 918
 919                 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
 920                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
 921
 922                 if (b_dont_submit_rx) {
 923                         qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
 924                                                 p_buffer);
 925                         continue;
 926                 }
 927
 928                 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
 929                                             p_buffer->rx_buffer_phys_addr, 0,
 930                                             p_buffer, true);
 931                 if (rc != 0) {
 932                         qed_ooo_put_free_buffer(p_hwfn,
 933                                                 p_hwfn->p_ooo_info, p_buffer);
 934                         b_dont_submit_rx = true;
 935                 }
 936         }
 937
 938         qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
 939
 940         return 0;
 941 }
 942
 943 static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn)
 944 {
 945         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
 946
 947         DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2),
 948                    "Stopping LL2 OOO queue [%02x]\n", *handle);
 949
 950         qed_ll2_terminate_connection(p_hwfn, *handle);
 951         qed_ll2_release_connection(p_hwfn, *handle);
 952         *handle = QED_LL2_UNUSED_HANDLE;
 953 }
 954
 955 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
 956                                      struct qed_ll2_info *p_ll2_conn,
 957                                      u8 action_on_error)
 958 {
 959         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
 960         struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
 961         struct core_rx_start_ramrod_data *p_ramrod = NULL;
 962         struct qed_spq_entry *p_ent = NULL;
 963         struct qed_sp_init_data init_data;
 964         u16 cqe_pbl_size;
 965         int rc = 0;
 966
 967         /* Get SPQ entry */
 968         memset(&init_data, 0, sizeof(init_data));
 969         init_data.cid = p_ll2_conn->cid;
 970         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
 971         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
 972
 973         rc = qed_sp_init_request(p_hwfn, &p_ent,
 974                                  CORE_RAMROD_RX_QUEUE_START,
 975                                  PROTOCOLID_CORE, &init_data);
 976         if (rc)
 977                 return rc;
 978
 979         p_ramrod = &p_ent->ramrod.core_rx_queue_start;
 980         memset(p_ramrod, 0, sizeof(*p_ramrod));
 981         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
 982         p_ramrod->sb_index = p_rx->rx_sb_index;
 983         p_ramrod->complete_event_flg = 1;
 984
 985         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
 986         DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
 987         cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
 988         p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
 989         DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
 990                        qed_chain_get_pbl_phys(&p_rx->rcq_chain));
 991
 992         p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
 993         p_ramrod->inner_vlan_stripping_en =
 994                 p_ll2_conn->input.rx_vlan_removal_en;
 995
 996         if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
 997             p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
 998                 p_ramrod->report_outer_vlan = 1;
 999         p_ramrod->queue_id = p_ll2_conn->queue_id;
1000         p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
1001
1002         if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
1003             p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
1004             conn_type != QED_LL2_TYPE_IWARP &&
1005                 (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))) {
1006                 p_ramrod->mf_si_bcast_accept_all = 1;
1007                 p_ramrod->mf_si_mcast_accept_all = 1;
1008         } else {
1009                 p_ramrod->mf_si_bcast_accept_all = 0;
1010                 p_ramrod->mf_si_mcast_accept_all = 0;
1011         }
1012
1013         p_ramrod->action_on_error.error_type = action_on_error;
1014         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1015         p_ramrod->zero_prod_flg = 1;
1016
1017         return qed_spq_post(p_hwfn, p_ent, NULL);
1018 }
1019
1020 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1021                                      struct qed_ll2_info *p_ll2_conn)
1022 {
1023         enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1024         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1025         struct core_tx_start_ramrod_data *p_ramrod = NULL;
1026         struct qed_spq_entry *p_ent = NULL;
1027         struct qed_sp_init_data init_data;
1028         u16 pq_id = 0, pbl_size;
1029         int rc = -EINVAL;
1030
1031         if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1032                 return 0;
1033
1034         if (likely(p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO))
1035                 p_ll2_conn->tx_stats_en = 0;
1036         else
1037                 p_ll2_conn->tx_stats_en = 1;
1038
1039         /* Get SPQ entry */
1040         memset(&init_data, 0, sizeof(init_data));
1041         init_data.cid = p_ll2_conn->cid;
1042         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1043         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1044
1045         rc = qed_sp_init_request(p_hwfn, &p_ent,
1046                                  CORE_RAMROD_TX_QUEUE_START,
1047                                  PROTOCOLID_CORE, &init_data);
1048         if (rc)
1049                 return rc;
1050
1051         p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1052
1053         p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1054         p_ramrod->sb_index = p_tx->tx_sb_index;
1055         p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1056         p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1057         p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1058
1059         DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1060                        qed_chain_get_pbl_phys(&p_tx->txq_chain));
1061         pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1062         p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1063
1064         switch (p_ll2_conn->input.tx_tc) {
1065         case PURE_LB_TC:
1066                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1067                 break;
1068         case PKT_LB_TC:
1069                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1070                 break;
1071         default:
1072                 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1073                 break;
1074         }
1075
1076         p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1077
1078         switch (conn_type) {
1079         case QED_LL2_TYPE_FCOE:
1080                 p_ramrod->conn_type = PROTOCOLID_FCOE;
1081                 break;
1082         case QED_LL2_TYPE_TCP_ULP:
1083                 p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1084                 break;
1085         case QED_LL2_TYPE_ROCE:
1086                 p_ramrod->conn_type = PROTOCOLID_ROCE;
1087                 break;
1088         case QED_LL2_TYPE_IWARP:
1089                 p_ramrod->conn_type = PROTOCOLID_IWARP;
1090                 break;
1091         case QED_LL2_TYPE_OOO:
1092                 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI ||
1093                     p_hwfn->hw_info.personality == QED_PCI_NVMETCP)
1094                         p_ramrod->conn_type = PROTOCOLID_TCP_ULP;
1095                 else
1096                         p_ramrod->conn_type = PROTOCOLID_IWARP;
1097                 break;
1098         default:
1099                 p_ramrod->conn_type = PROTOCOLID_ETH;
1100                 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1101         }
1102
1103         p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1104
1105         rc = qed_spq_post(p_hwfn, p_ent, NULL);
1106         if (rc)
1107                 return rc;
1108
1109         rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1110                                  &p_tx->db_msg, DB_REC_WIDTH_32B,
1111                                  DB_REC_KERNEL);
1112         return rc;
1113 }
1114
1115 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1116                                     struct qed_ll2_info *p_ll2_conn)
1117 {
1118         struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1119         struct qed_spq_entry *p_ent = NULL;
1120         struct qed_sp_init_data init_data;
1121         int rc = -EINVAL;
1122
1123         /* Get SPQ entry */
1124         memset(&init_data, 0, sizeof(init_data));
1125         init_data.cid = p_ll2_conn->cid;
1126         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1127         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1128
1129         rc = qed_sp_init_request(p_hwfn, &p_ent,
1130                                  CORE_RAMROD_RX_QUEUE_STOP,
1131                                  PROTOCOLID_CORE, &init_data);
1132         if (rc)
1133                 return rc;
1134
1135         p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1136
1137         p_ramrod->complete_event_flg = 1;
1138         p_ramrod->queue_id = p_ll2_conn->queue_id;
1139
1140         return qed_spq_post(p_hwfn, p_ent, NULL);
1141 }
1142
1143 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1144                                     struct qed_ll2_info *p_ll2_conn)
1145 {
1146         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1147         struct qed_spq_entry *p_ent = NULL;
1148         struct qed_sp_init_data init_data;
1149         int rc = -EINVAL;
1150
1151         qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1152
1153         /* Get SPQ entry */
1154         memset(&init_data, 0, sizeof(init_data));
1155         init_data.cid = p_ll2_conn->cid;
1156         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1157         init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1158
1159         rc = qed_sp_init_request(p_hwfn, &p_ent,
1160                                  CORE_RAMROD_TX_QUEUE_STOP,
1161                                  PROTOCOLID_CORE, &init_data);
1162         if (rc)
1163                 return rc;
1164
1165         return qed_spq_post(p_hwfn, p_ent, NULL);
1166 }
1167
1168 static int
1169 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1170                               struct qed_ll2_info *p_ll2_info)
1171 {
1172         struct qed_chain_init_params params = {
1173                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1174                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1175                 .num_elems      = p_ll2_info->input.rx_num_desc,
1176         };
1177         struct qed_dev *cdev = p_hwfn->cdev;
1178         struct qed_ll2_rx_packet *p_descq;
1179         u32 capacity;
1180         int rc = 0;
1181
1182         if (!p_ll2_info->input.rx_num_desc)
1183                 goto out;
1184
1185         params.mode = QED_CHAIN_MODE_NEXT_PTR;
1186         params.elem_size = sizeof(struct core_rx_bd);
1187
1188         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, &params);
1189         if (rc) {
1190                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1191                 goto out;
1192         }
1193
1194         capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1195         p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1196                           GFP_KERNEL);
1197         if (!p_descq) {
1198                 rc = -ENOMEM;
1199                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1200                 goto out;
1201         }
1202         p_ll2_info->rx_queue.descq_array = p_descq;
1203
1204         params.mode = QED_CHAIN_MODE_PBL;
1205         params.elem_size = sizeof(struct core_rx_fast_path_cqe);
1206
1207         rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, &params);
1208         if (rc) {
1209                 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1210                 goto out;
1211         }
1212
1213         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1214                    "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1215                    p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1216
1217 out:
1218         return rc;
1219 }
1220
1221 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1222                                          struct qed_ll2_info *p_ll2_info)
1223 {
1224         struct qed_chain_init_params params = {
1225                 .mode           = QED_CHAIN_MODE_PBL,
1226                 .intended_use   = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1227                 .cnt_type       = QED_CHAIN_CNT_TYPE_U16,
1228                 .num_elems      = p_ll2_info->input.tx_num_desc,
1229                 .elem_size      = sizeof(struct core_tx_bd),
1230         };
1231         struct qed_ll2_tx_packet *p_descq;
1232         size_t desc_size;
1233         u32 capacity;
1234         int rc = 0;
1235
1236         if (!p_ll2_info->input.tx_num_desc)
1237                 goto out;
1238
1239         rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
1240                              &params);
1241         if (rc)
1242                 goto out;
1243
1244         capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1245         /* All bds_set elements are flexibily added. */
1246         desc_size = struct_size(p_descq, bds_set,
1247                                 p_ll2_info->input.tx_max_bds_per_packet);
1248
1249         p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1250         if (!p_descq) {
1251                 rc = -ENOMEM;
1252                 goto out;
1253         }
1254         p_ll2_info->tx_queue.descq_mem = p_descq;
1255
1256         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1257                    "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1258                    p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1259
1260 out:
1261         if (rc)
1262                 DP_NOTICE(p_hwfn,
1263                           "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1264                           p_ll2_info->input.tx_num_desc);
1265         return rc;
1266 }
1267
1268 static int
1269 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1270                                struct qed_ll2_info *p_ll2_info, u16 mtu)
1271 {
1272         struct qed_ooo_buffer *p_buf = NULL;
1273         void *p_virt;
1274         u16 buf_idx;
1275         int rc = 0;
1276
1277         if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1278                 return rc;
1279
1280         /* Correct number of requested OOO buffers if needed */
1281         if (!p_ll2_info->input.rx_num_ooo_buffers) {
1282                 u16 num_desc = p_ll2_info->input.rx_num_desc;
1283
1284                 if (!num_desc)
1285                         return -EINVAL;
1286                 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1287         }
1288
1289         for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1290              buf_idx++) {
1291                 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1292                 if (!p_buf) {
1293                         rc = -ENOMEM;
1294                         goto out;
1295                 }
1296
1297                 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1298                 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1299                                          ETH_CACHE_LINE_SIZE - 1) &
1300                                         ~(ETH_CACHE_LINE_SIZE - 1);
1301                 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1302                                             p_buf->rx_buffer_size,
1303                                             &p_buf->rx_buffer_phys_addr,
1304                                             GFP_KERNEL);
1305                 if (!p_virt) {
1306                         kfree(p_buf);
1307                         rc = -ENOMEM;
1308                         goto out;
1309                 }
1310
1311                 p_buf->rx_buffer_virt_addr = p_virt;
1312                 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1313         }
1314
1315         DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1316                    "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1317                    p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1318
1319 out:
1320         return rc;
1321 }
1322
1323 static int
1324 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1325 {
1326         if (!cbs || (!cbs->rx_comp_cb ||
1327                      !cbs->rx_release_cb ||
1328                      !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1329                 return -EINVAL;
1330
1331         p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1332         p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1333         p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1334         p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1335         p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1336         p_ll2_info->cbs.cookie = cbs->cookie;
1337
1338         return 0;
1339 }
1340
1341 static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn,
1342                                         struct qed_ll2_acquire_data *data,
1343                                         u8 *start_idx, u8 *last_idx)
1344 {
1345         /* LL2 queues handles will be split as follows:
1346          * First will be the legacy queues, and then the ctx based.
1347          */
1348         if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1349                 *start_idx = QED_LL2_LEGACY_CONN_BASE_PF;
1350                 *last_idx = *start_idx +
1351                         QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF;
1352         } else {
1353                 /* QED_LL2_RX_TYPE_CTX */
1354                 *start_idx = QED_LL2_CTX_CONN_BASE_PF;
1355                 *last_idx = *start_idx +
1356                         QED_MAX_NUM_OF_CTX_LL2_CONNS_PF;
1357         }
1358 }
1359
1360 static enum core_error_handle
1361 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1362 {
1363         switch (err) {
1364         case QED_LL2_DROP_PACKET:
1365                 return LL2_DROP_PACKET;
1366         case QED_LL2_DO_NOTHING:
1367                 return LL2_DO_NOTHING;
1368         case QED_LL2_ASSERT:
1369                 return LL2_ASSERT;
1370         default:
1371                 return LL2_DO_NOTHING;
1372         }
1373 }
1374
1375 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1376 {
1377         struct qed_hwfn *p_hwfn = cxt;
1378         qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1379         struct qed_ll2_info *p_ll2_info = NULL;
1380         u8 i, first_idx, last_idx, *p_tx_max;
1381         int rc;
1382
1383         if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1384                 return -EINVAL;
1385
1386         _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx);
1387
1388         /* Find a free connection to be used */
1389         for (i = first_idx; i < last_idx; i++) {
1390                 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1391                 if (p_hwfn->p_ll2_info[i].b_active) {
1392                         mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1393                         continue;
1394                 }
1395
1396                 p_hwfn->p_ll2_info[i].b_active = true;
1397                 p_ll2_info = &p_hwfn->p_ll2_info[i];
1398                 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1399                 break;
1400         }
1401         if (!p_ll2_info)
1402                 return -EBUSY;
1403
1404         memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1405
1406         switch (data->input.tx_dest) {
1407         case QED_LL2_TX_DEST_NW:
1408                 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1409                 break;
1410         case QED_LL2_TX_DEST_LB:
1411                 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1412                 break;
1413         case QED_LL2_TX_DEST_DROP:
1414                 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1415                 break;
1416         default:
1417                 return -EINVAL;
1418         }
1419
1420         if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1421             data->input.secondary_queue)
1422                 p_ll2_info->main_func_queue = false;
1423         else
1424                 p_ll2_info->main_func_queue = true;
1425
1426         /* Correct maximum number of Tx BDs */
1427         p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1428         if (*p_tx_max == 0)
1429                 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1430         else
1431                 *p_tx_max = min_t(u8, *p_tx_max,
1432                                   CORE_LL2_TX_MAX_BDS_PER_PACKET);
1433
1434         rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1435         if (rc) {
1436                 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1437                 goto q_allocate_fail;
1438         }
1439
1440         rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1441         if (rc)
1442                 goto q_allocate_fail;
1443
1444         rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1445         if (rc)
1446                 goto q_allocate_fail;
1447
1448         rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1449                                             data->input.mtu);
1450         if (rc)
1451                 goto q_allocate_fail;
1452
1453         /* Register callbacks for the Rx/Tx queues */
1454         if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1455                 comp_rx_cb = qed_ll2_lb_rxq_completion;
1456                 comp_tx_cb = qed_ll2_lb_txq_completion;
1457         } else {
1458                 comp_rx_cb = qed_ll2_rxq_completion;
1459                 comp_tx_cb = qed_ll2_txq_completion;
1460         }
1461
1462         if (data->input.rx_num_desc) {
1463                 qed_int_register_cb(p_hwfn, comp_rx_cb,
1464                                     &p_hwfn->p_ll2_info[i],
1465                                     &p_ll2_info->rx_queue.rx_sb_index,
1466                                     &p_ll2_info->rx_queue.p_fw_cons);
1467                 p_ll2_info->rx_queue.b_cb_registered = true;
1468         }
1469
1470         if (data->input.tx_num_desc) {
1471                 qed_int_register_cb(p_hwfn,
1472                                     comp_tx_cb,
1473                                     &p_hwfn->p_ll2_info[i],
1474                                     &p_ll2_info->tx_queue.tx_sb_index,
1475                                     &p_ll2_info->tx_queue.p_fw_cons);
1476                 p_ll2_info->tx_queue.b_cb_registered = true;
1477         }
1478
1479         *data->p_connection_handle = i;
1480         return rc;
1481
1482 q_allocate_fail:
1483         qed_ll2_release_connection(p_hwfn, i);
1484         return -ENOMEM;
1485 }
1486
1487 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1488                                            struct qed_ll2_info *p_ll2_conn)
1489 {
1490         enum qed_ll2_error_handle error_input;
1491         enum core_error_handle error_mode;
1492         u8 action_on_error = 0;
1493         int rc;
1494
1495         if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1496                 return 0;
1497
1498         DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1499         error_input = p_ll2_conn->input.ai_err_packet_too_big;
1500         error_mode = qed_ll2_get_error_choice(error_input);
1501         SET_FIELD(action_on_error,
1502                   CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1503         error_input = p_ll2_conn->input.ai_err_no_buf;
1504         error_mode = qed_ll2_get_error_choice(error_input);
1505         SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1506
1507         rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1508         if (rc)
1509                 return rc;
1510
1511         if (p_ll2_conn->rx_queue.ctx_based) {
1512                 rc = qed_db_recovery_add(p_hwfn->cdev,
1513                                          p_ll2_conn->rx_queue.set_prod_addr,
1514                                          &p_ll2_conn->rx_queue.db_data,
1515                                          DB_REC_WIDTH_64B, DB_REC_KERNEL);
1516         }
1517
1518         return rc;
1519 }
1520
1521 static void
1522 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1523                                  struct qed_ll2_info *p_ll2_conn)
1524 {
1525         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1526                 return;
1527
1528         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1529         qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1530 }
1531
1532 static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn,
1533                                             u8 handle,
1534                                             u8 ll2_queue_type)
1535 {
1536         u8 qid;
1537
1538         if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
1539                 return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle;
1540
1541         /* QED_LL2_RX_TYPE_CTX
1542          * FW distinguishes between the legacy queues (ram based) and the
1543          * ctx based queues by the queue_id.
1544          * The first MAX_NUM_LL2_RX_RAM_QUEUES queues are legacy
1545          * and the queue ids above that are ctx base.
1546          */
1547         qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] +
1548               MAX_NUM_LL2_RX_RAM_QUEUES;
1549
1550         /* See comment on the acquire connection for how the ll2
1551          * queues handles are divided.
1552          */
1553         qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF);
1554
1555         return qid;
1556 }
1557
1558 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1559 {
1560         struct core_conn_context *p_cxt;
1561         struct qed_ll2_tx_packet *p_pkt;
1562         struct qed_ll2_info *p_ll2_conn;
1563         struct qed_hwfn *p_hwfn = cxt;
1564         struct qed_ll2_rx_queue *p_rx;
1565         struct qed_ll2_tx_queue *p_tx;
1566         struct qed_cxt_info cxt_info;
1567         struct qed_ptt *p_ptt;
1568         int rc = -EINVAL;
1569         u32 i, capacity;
1570         size_t desc_size;
1571         u8 qid, stats_id;
1572
1573         p_ptt = qed_ptt_acquire(p_hwfn);
1574         if (!p_ptt)
1575                 return -EAGAIN;
1576
1577         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1578         if (!p_ll2_conn) {
1579                 rc = -EINVAL;
1580                 goto out;
1581         }
1582
1583         p_rx = &p_ll2_conn->rx_queue;
1584         p_tx = &p_ll2_conn->tx_queue;
1585
1586         qed_chain_reset(&p_rx->rxq_chain);
1587         qed_chain_reset(&p_rx->rcq_chain);
1588         INIT_LIST_HEAD(&p_rx->active_descq);
1589         INIT_LIST_HEAD(&p_rx->free_descq);
1590         INIT_LIST_HEAD(&p_rx->posting_descq);
1591         spin_lock_init(&p_rx->lock);
1592         capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1593         for (i = 0; i < capacity; i++)
1594                 list_add_tail(&p_rx->descq_array[i].list_entry,
1595                               &p_rx->free_descq);
1596         *p_rx->p_fw_cons = 0;
1597
1598         qed_chain_reset(&p_tx->txq_chain);
1599         INIT_LIST_HEAD(&p_tx->active_descq);
1600         INIT_LIST_HEAD(&p_tx->free_descq);
1601         INIT_LIST_HEAD(&p_tx->sending_descq);
1602         spin_lock_init(&p_tx->lock);
1603         capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1604         /* All bds_set elements are flexibily added. */
1605         desc_size = struct_size(p_pkt, bds_set,
1606                                 p_ll2_conn->input.tx_max_bds_per_packet);
1607
1608         for (i = 0; i < capacity; i++) {
1609                 p_pkt = p_tx->descq_mem + desc_size * i;
1610                 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1611         }
1612         p_tx->cur_completing_bd_idx = 0;
1613         p_tx->bds_idx = 0;
1614         p_tx->b_completing_packet = false;
1615         p_tx->cur_send_packet = NULL;
1616         p_tx->cur_send_frag_num = 0;
1617         p_tx->cur_completing_frag_num = 0;
1618         *p_tx->p_fw_cons = 0;
1619
1620         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1621         if (rc)
1622                 goto out;
1623         cxt_info.iid = p_ll2_conn->cid;
1624         rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
1625         if (rc) {
1626                 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
1627                           p_ll2_conn->cid);
1628                 goto out;
1629         }
1630
1631         p_cxt = cxt_info.p_cxt;
1632
1633         memset(p_cxt, 0, sizeof(*p_cxt));
1634
1635         qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle,
1636                                          p_ll2_conn->input.rx_conn_type);
1637         stats_id = qed_ll2_handle_to_stats_id(p_hwfn,
1638                                               p_ll2_conn->input.rx_conn_type,
1639                                               qid);
1640         p_ll2_conn->queue_id = qid;
1641         p_ll2_conn->tx_stats_id = stats_id;
1642
1643         /* If there is no valid stats id for this connection, disable stats */
1644         if (p_ll2_conn->tx_stats_id == QED_LL2_INVALID_STATS_ID) {
1645                 p_ll2_conn->tx_stats_en = 0;
1646                 DP_VERBOSE(p_hwfn,
1647                            QED_MSG_LL2,
1648                            "Disabling stats for queue %d - not enough counters\n",
1649                            qid);
1650         }
1651
1652         DP_VERBOSE(p_hwfn,
1653                    QED_MSG_LL2,
1654                    "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d stats_id=%d\n",
1655                    p_hwfn->rel_pf_id,
1656                    p_ll2_conn->input.rx_conn_type, qid, stats_id);
1657
1658         if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1659                 p_rx->set_prod_addr =
1660                     (u8 __iomem *)p_hwfn->regview +
1661                     GET_GTT_REG_ADDR(GTT_BAR0_MAP_REG_TSDM_RAM,
1662                                      TSTORM_LL2_RX_PRODS, qid);
1663         } else {
1664                 /* QED_LL2_RX_TYPE_CTX - using doorbell */
1665                 p_rx->ctx_based = 1;
1666
1667                 p_rx->set_prod_addr = p_hwfn->doorbells +
1668                         p_hwfn->dpi_start_offset +
1669                         DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE);
1670
1671                 /* prepare db data */
1672                 p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid);
1673                 SET_FIELD(p_rx->db_data.params,
1674                           CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET);
1675                 SET_FIELD(p_rx->db_data.params,
1676                           CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0);
1677         }
1678
1679         p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1680                                             qed_db_addr(p_ll2_conn->cid,
1681                                                         DQ_DEMS_LEGACY);
1682         /* prepare db data */
1683         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1684         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1685         SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1686                   DQ_XCM_CORE_TX_BD_PROD_CMD);
1687         p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1688
1689         rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1690         if (rc)
1691                 goto out;
1692
1693         rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1694         if (rc)
1695                 goto out;
1696
1697         if (!QED_IS_RDMA_PERSONALITY(p_hwfn) &&
1698             !QED_IS_NVMETCP_PERSONALITY(p_hwfn))
1699                 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1700
1701         qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1702
1703         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1704                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1705                         qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1706                                                     QED_LLH_FILTER_ETHERTYPE,
1707                                                     ETH_P_FCOE, 0);
1708                 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1709                                             QED_LLH_FILTER_ETHERTYPE,
1710                                             ETH_P_FIP, 0);
1711         }
1712
1713 out:
1714         qed_ptt_release(p_hwfn, p_ptt);
1715         return rc;
1716 }
1717
1718 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1719                                              struct qed_ll2_rx_queue *p_rx,
1720                                              struct qed_ll2_rx_packet *p_curp)
1721 {
1722         struct qed_ll2_rx_packet *p_posting_packet = NULL;
1723         struct core_ll2_rx_prod rx_prod = { 0, 0 };
1724         bool b_notify_fw = false;
1725         u16 bd_prod, cq_prod;
1726
1727         /* This handles the flushing of already posted buffers */
1728         while (!list_empty(&p_rx->posting_descq)) {
1729                 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1730                                                     struct qed_ll2_rx_packet,
1731                                                     list_entry);
1732                 list_move_tail(&p_posting_packet->list_entry,
1733                                &p_rx->active_descq);
1734                 b_notify_fw = true;
1735         }
1736
1737         /* This handles the supplied packet [if there is one] */
1738         if (p_curp) {
1739                 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1740                 b_notify_fw = true;
1741         }
1742
1743         if (!b_notify_fw)
1744                 return;
1745
1746         bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1747         cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1748         if (p_rx->ctx_based) {
1749                 /* update producer by giving a doorbell */
1750                 p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod);
1751                 p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod);
1752                 /* Make sure chain element is updated before ringing the
1753                  * doorbell
1754                  */
1755                 dma_wmb();
1756                 DIRECT_REG_WR64(p_rx->set_prod_addr,
1757                                 *((u64 *)&p_rx->db_data));
1758         } else {
1759                 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1760                 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1761
1762                 /* Make sure chain element is updated before ringing the
1763                  * doorbell
1764                  */
1765                 dma_wmb();
1766
1767                 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1768         }
1769 }
1770
1771 int qed_ll2_post_rx_buffer(void *cxt,
1772                            u8 connection_handle,
1773                            dma_addr_t addr,
1774                            u16 buf_len, void *cookie, u8 notify_fw)
1775 {
1776         struct qed_hwfn *p_hwfn = cxt;
1777         struct core_rx_bd_with_buff_len *p_curb = NULL;
1778         struct qed_ll2_rx_packet *p_curp = NULL;
1779         struct qed_ll2_info *p_ll2_conn;
1780         struct qed_ll2_rx_queue *p_rx;
1781         unsigned long flags;
1782         void *p_data;
1783         int rc = 0;
1784
1785         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1786         if (!p_ll2_conn)
1787                 return -EINVAL;
1788         p_rx = &p_ll2_conn->rx_queue;
1789         if (!p_rx->set_prod_addr)
1790                 return -EIO;
1791
1792         spin_lock_irqsave(&p_rx->lock, flags);
1793         if (!list_empty(&p_rx->free_descq))
1794                 p_curp = list_first_entry(&p_rx->free_descq,
1795                                           struct qed_ll2_rx_packet, list_entry);
1796         if (p_curp) {
1797                 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1798                     qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1799                         p_data = qed_chain_produce(&p_rx->rxq_chain);
1800                         p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1801                         qed_chain_produce(&p_rx->rcq_chain);
1802                 }
1803         }
1804
1805         /* If we're lacking entries, let's try to flush buffers to FW */
1806         if (!p_curp || !p_curb) {
1807                 rc = -EBUSY;
1808                 p_curp = NULL;
1809                 goto out_notify;
1810         }
1811
1812         /* We have an Rx packet we can fill */
1813         DMA_REGPAIR_LE(p_curb->addr, addr);
1814         p_curb->buff_length = cpu_to_le16(buf_len);
1815         p_curp->rx_buf_addr = addr;
1816         p_curp->cookie = cookie;
1817         p_curp->rxq_bd = p_curb;
1818         p_curp->buf_length = buf_len;
1819         list_del(&p_curp->list_entry);
1820
1821         /* Check if we only want to enqueue this packet without informing FW */
1822         if (!notify_fw) {
1823                 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1824                 goto out;
1825         }
1826
1827 out_notify:
1828         qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1829 out:
1830         spin_unlock_irqrestore(&p_rx->lock, flags);
1831         return rc;
1832 }
1833
1834 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1835                                           struct qed_ll2_tx_queue *p_tx,
1836                                           struct qed_ll2_tx_packet *p_curp,
1837                                           struct qed_ll2_tx_pkt_info *pkt,
1838                                           u8 notify_fw)
1839 {
1840         list_del(&p_curp->list_entry);
1841         p_curp->cookie = pkt->cookie;
1842         p_curp->bd_used = pkt->num_of_bds;
1843         p_curp->notify_fw = notify_fw;
1844         p_tx->cur_send_packet = p_curp;
1845         p_tx->cur_send_frag_num = 0;
1846
1847         p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1848         p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1849         p_tx->cur_send_frag_num++;
1850 }
1851
1852 static void
1853 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1854                                  struct qed_ll2_info *p_ll2,
1855                                  struct qed_ll2_tx_packet *p_curp,
1856                                  struct qed_ll2_tx_pkt_info *pkt)
1857 {
1858         struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1859         u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1860         struct core_tx_bd *start_bd = NULL;
1861         enum core_roce_flavor_type roce_flavor;
1862         enum core_tx_dest tx_dest;
1863         u16 bd_data = 0, frag_idx;
1864         u16 bitfield1;
1865
1866         roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1867                                                              : CORE_RROCE;
1868
1869         switch (pkt->tx_dest) {
1870         case QED_LL2_TX_DEST_NW:
1871                 tx_dest = CORE_TX_DEST_NW;
1872                 break;
1873         case QED_LL2_TX_DEST_LB:
1874                 tx_dest = CORE_TX_DEST_LB;
1875                 break;
1876         case QED_LL2_TX_DEST_DROP:
1877                 tx_dest = CORE_TX_DEST_DROP;
1878                 break;
1879         default:
1880                 tx_dest = CORE_TX_DEST_LB;
1881                 break;
1882         }
1883
1884         start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1885         if (likely(QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1886                    p_ll2->input.conn_type == QED_LL2_TYPE_OOO)) {
1887                 start_bd->nw_vlan_or_lb_echo =
1888                     cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1889         } else {
1890                 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1891                 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1892                     p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1893                         pkt->remove_stag = true;
1894         }
1895
1896         bitfield1 = le16_to_cpu(start_bd->bitfield1);
1897         SET_FIELD(bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, pkt->l4_hdr_offset_w);
1898         SET_FIELD(bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1899         start_bd->bitfield1 = cpu_to_le16(bitfield1);
1900
1901         bd_data |= pkt->bd_flags;
1902         SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1903         SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1904         SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1905         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1906         SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1907         SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1908         SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1909                   !!(pkt->remove_stag));
1910
1911         start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1912         DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1913         start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1914
1915         DP_VERBOSE(p_hwfn,
1916                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1917                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
1918                    p_ll2->queue_id,
1919                    p_ll2->cid,
1920                    p_ll2->input.conn_type,
1921                    prod_idx,
1922                    pkt->first_frag_len,
1923                    pkt->num_of_bds,
1924                    le32_to_cpu(start_bd->addr.hi),
1925                    le32_to_cpu(start_bd->addr.lo));
1926
1927         if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1928                 return;
1929
1930         /* Need to provide the packet with additional BDs for frags */
1931         for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1932              frag_idx < pkt->num_of_bds; frag_idx++) {
1933                 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1934
1935                 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1936                 (*p_bd)->bd_data.as_bitfield = 0;
1937                 (*p_bd)->bitfield1 = 0;
1938                 p_curp->bds_set[frag_idx].tx_frag = 0;
1939                 p_curp->bds_set[frag_idx].frag_len = 0;
1940         }
1941 }
1942
1943 /* This should be called while the Txq spinlock is being held */
1944 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1945                                      struct qed_ll2_info *p_ll2_conn)
1946 {
1947         bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1948         struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1949         struct qed_ll2_tx_packet *p_pkt = NULL;
1950         u16 bd_prod;
1951
1952         /* If there are missing BDs, don't do anything now */
1953         if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1954             p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1955                 return;
1956
1957         /* Push the current packet to the list and clean after it */
1958         list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1959                       &p_ll2_conn->tx_queue.sending_descq);
1960         p_ll2_conn->tx_queue.cur_send_packet = NULL;
1961         p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1962
1963         /* Notify FW of packet only if requested to */
1964         if (!b_notify)
1965                 return;
1966
1967         bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1968
1969         while (!list_empty(&p_tx->sending_descq)) {
1970                 p_pkt = list_first_entry(&p_tx->sending_descq,
1971                                          struct qed_ll2_tx_packet, list_entry);
1972                 if (!p_pkt)
1973                         break;
1974
1975                 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1976         }
1977
1978         p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1979
1980         /* Make sure the BDs data is updated before ringing the doorbell */
1981         wmb();
1982
1983         DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1984
1985         DP_VERBOSE(p_hwfn,
1986                    (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1987                    "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1988                    p_ll2_conn->queue_id,
1989                    p_ll2_conn->cid,
1990                    p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1991 }
1992
1993 int qed_ll2_prepare_tx_packet(void *cxt,
1994                               u8 connection_handle,
1995                               struct qed_ll2_tx_pkt_info *pkt,
1996                               bool notify_fw)
1997 {
1998         struct qed_hwfn *p_hwfn = cxt;
1999         struct qed_ll2_tx_packet *p_curp = NULL;
2000         struct qed_ll2_info *p_ll2_conn = NULL;
2001         struct qed_ll2_tx_queue *p_tx;
2002         struct qed_chain *p_tx_chain;
2003         unsigned long flags;
2004         int rc = 0;
2005
2006         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2007         if (unlikely(!p_ll2_conn))
2008                 return -EINVAL;
2009         p_tx = &p_ll2_conn->tx_queue;
2010         p_tx_chain = &p_tx->txq_chain;
2011
2012         if (unlikely(pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet))
2013                 return -EIO;
2014
2015         spin_lock_irqsave(&p_tx->lock, flags);
2016         if (unlikely(p_tx->cur_send_packet)) {
2017                 rc = -EEXIST;
2018                 goto out;
2019         }
2020
2021         /* Get entry, but only if we have tx elements for it */
2022         if (unlikely(!list_empty(&p_tx->free_descq)))
2023                 p_curp = list_first_entry(&p_tx->free_descq,
2024                                           struct qed_ll2_tx_packet, list_entry);
2025         if (unlikely(p_curp &&
2026                      qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds))
2027                 p_curp = NULL;
2028
2029         if (unlikely(!p_curp)) {
2030                 rc = -EBUSY;
2031                 goto out;
2032         }
2033
2034         /* Prepare packet and BD, and perhaps send a doorbell to FW */
2035         qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
2036
2037         qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
2038
2039         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2040
2041 out:
2042         spin_unlock_irqrestore(&p_tx->lock, flags);
2043         return rc;
2044 }
2045
2046 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
2047                                       u8 connection_handle,
2048                                       dma_addr_t addr, u16 nbytes)
2049 {
2050         struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
2051         struct qed_hwfn *p_hwfn = cxt;
2052         struct qed_ll2_info *p_ll2_conn = NULL;
2053         u16 cur_send_frag_num = 0;
2054         struct core_tx_bd *p_bd;
2055         unsigned long flags;
2056
2057         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2058         if (unlikely(!p_ll2_conn))
2059                 return -EINVAL;
2060
2061         if (unlikely(!p_ll2_conn->tx_queue.cur_send_packet))
2062                 return -EINVAL;
2063
2064         p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
2065         cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
2066
2067         if (unlikely(cur_send_frag_num >= p_cur_send_packet->bd_used))
2068                 return -EINVAL;
2069
2070         /* Fill the BD information, and possibly notify FW */
2071         p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
2072         DMA_REGPAIR_LE(p_bd->addr, addr);
2073         p_bd->nbytes = cpu_to_le16(nbytes);
2074         p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
2075         p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
2076
2077         p_ll2_conn->tx_queue.cur_send_frag_num++;
2078
2079         spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
2080         qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2081         spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
2082
2083         return 0;
2084 }
2085
2086 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
2087 {
2088         struct qed_hwfn *p_hwfn = cxt;
2089         struct qed_ll2_info *p_ll2_conn = NULL;
2090         int rc = -EINVAL;
2091         struct qed_ptt *p_ptt;
2092
2093         p_ptt = qed_ptt_acquire(p_hwfn);
2094         if (!p_ptt)
2095                 return -EAGAIN;
2096
2097         p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
2098         if (!p_ll2_conn) {
2099                 rc = -EINVAL;
2100                 goto out;
2101         }
2102
2103         /* Stop Tx & Rx of connection, if needed */
2104         if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
2105                 p_ll2_conn->tx_queue.b_cb_registered = false;
2106                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2107                 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
2108                 if (rc)
2109                         goto out;
2110
2111                 qed_ll2_txq_flush(p_hwfn, connection_handle);
2112                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
2113         }
2114
2115         if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
2116                 p_ll2_conn->rx_queue.b_cb_registered = false;
2117                 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
2118
2119                 if (p_ll2_conn->rx_queue.ctx_based)
2120                         qed_db_recovery_del(p_hwfn->cdev,
2121                                             p_ll2_conn->rx_queue.set_prod_addr,
2122                                             &p_ll2_conn->rx_queue.db_data);
2123
2124                 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
2125                 if (rc)
2126                         goto out;
2127
2128                 qed_ll2_rxq_flush(p_hwfn, connection_handle);
2129                 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
2130         }
2131
2132         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
2133                 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2134
2135         if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
2136                 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
2137                         qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2138                                                        QED_LLH_FILTER_ETHERTYPE,
2139                                                        ETH_P_FCOE, 0);
2140                 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2141                                                QED_LLH_FILTER_ETHERTYPE,
2142                                                ETH_P_FIP, 0);
2143         }
2144
2145 out:
2146         qed_ptt_release(p_hwfn, p_ptt);
2147         return rc;
2148 }
2149
2150 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
2151                                            struct qed_ll2_info *p_ll2_conn)
2152 {
2153         struct qed_ooo_buffer *p_buffer;
2154
2155         if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2156                 return;
2157
2158         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2159         while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2160                                                    p_hwfn->p_ooo_info))) {
2161                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2162                                   p_buffer->rx_buffer_size,
2163                                   p_buffer->rx_buffer_virt_addr,
2164                                   p_buffer->rx_buffer_phys_addr);
2165                 kfree(p_buffer);
2166         }
2167 }
2168
2169 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2170 {
2171         struct qed_hwfn *p_hwfn = cxt;
2172         struct qed_ll2_info *p_ll2_conn = NULL;
2173
2174         p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2175         if (!p_ll2_conn)
2176                 return;
2177
2178         kfree(p_ll2_conn->tx_queue.descq_mem);
2179         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2180
2181         kfree(p_ll2_conn->rx_queue.descq_array);
2182         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2183         qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2184
2185         qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2186
2187         qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2188
2189         mutex_lock(&p_ll2_conn->mutex);
2190         p_ll2_conn->b_active = false;
2191         mutex_unlock(&p_ll2_conn->mutex);
2192 }
2193
2194 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2195 {
2196         struct qed_ll2_info *p_ll2_connections;
2197         u8 i;
2198
2199         /* Allocate LL2's set struct */
2200         p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2201                                     sizeof(struct qed_ll2_info), GFP_KERNEL);
2202         if (!p_ll2_connections) {
2203                 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2204                 return -ENOMEM;
2205         }
2206
2207         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2208                 p_ll2_connections[i].my_id = i;
2209
2210         p_hwfn->p_ll2_info = p_ll2_connections;
2211         return 0;
2212 }
2213
2214 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2215 {
2216         int i;
2217
2218         for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2219                 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2220 }
2221
2222 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2223 {
2224         if (!p_hwfn->p_ll2_info)
2225                 return;
2226
2227         kfree(p_hwfn->p_ll2_info);
2228         p_hwfn->p_ll2_info = NULL;
2229 }
2230
2231 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2232                                     struct qed_ptt *p_ptt,
2233                                     struct qed_ll2_stats *p_stats)
2234 {
2235         struct core_ll2_port_stats port_stats;
2236
2237         memset(&port_stats, 0, sizeof(port_stats));
2238         qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2239                         BAR0_MAP_REG_TSDM_RAM +
2240                         TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2241                         sizeof(port_stats));
2242
2243         p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2244         p_stats->gsi_invalid_pkt_length +=
2245             HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2246         p_stats->gsi_unsupported_pkt_typ +=
2247             HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2248         p_stats->gsi_crcchksm_error +=
2249             HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2250 }
2251
2252 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2253                                 struct qed_ptt *p_ptt,
2254                                 struct qed_ll2_info *p_ll2_conn,
2255                                 struct qed_ll2_stats *p_stats)
2256 {
2257         struct core_ll2_tstorm_per_queue_stat tstats;
2258         u8 qid = p_ll2_conn->queue_id;
2259         u32 tstats_addr;
2260
2261         memset(&tstats, 0, sizeof(tstats));
2262         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2263                       CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2264         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2265
2266         p_stats->packet_too_big_discard +=
2267                         HILO_64_REGPAIR(tstats.packet_too_big_discard);
2268         p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2269 }
2270
2271 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2272                                 struct qed_ptt *p_ptt,
2273                                 struct qed_ll2_info *p_ll2_conn,
2274                                 struct qed_ll2_stats *p_stats)
2275 {
2276         struct core_ll2_ustorm_per_queue_stat ustats;
2277         u8 qid = p_ll2_conn->queue_id;
2278         u32 ustats_addr;
2279
2280         memset(&ustats, 0, sizeof(ustats));
2281         ustats_addr = BAR0_MAP_REG_USDM_RAM +
2282                       CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2283         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2284
2285         p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2286         p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2287         p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2288         p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2289         p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2290         p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2291 }
2292
2293 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2294                                 struct qed_ptt *p_ptt,
2295                                 struct qed_ll2_info *p_ll2_conn,
2296                                 struct qed_ll2_stats *p_stats)
2297 {
2298         struct core_ll2_pstorm_per_queue_stat pstats;
2299         u8 stats_id = p_ll2_conn->tx_stats_id;
2300         u32 pstats_addr;
2301
2302         memset(&pstats, 0, sizeof(pstats));
2303         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2304                       CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2305         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2306
2307         p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2308         p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2309         p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2310         p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2311         p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2312         p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2313 }
2314
2315 static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2316                                struct qed_ll2_stats *p_stats)
2317 {
2318         struct qed_hwfn *p_hwfn = cxt;
2319         struct qed_ll2_info *p_ll2_conn = NULL;
2320         struct qed_ptt *p_ptt;
2321
2322         if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2323             !p_hwfn->p_ll2_info)
2324                 return -EINVAL;
2325
2326         p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2327
2328         p_ptt = qed_ptt_acquire(p_hwfn);
2329         if (!p_ptt) {
2330                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2331                 return -EINVAL;
2332         }
2333
2334         if (p_ll2_conn->input.gsi_enable)
2335                 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2336
2337         _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2338
2339         _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2340
2341         if (p_ll2_conn->tx_stats_en)
2342                 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2343
2344         qed_ptt_release(p_hwfn, p_ptt);
2345
2346         return 0;
2347 }
2348
2349 int qed_ll2_get_stats(void *cxt,
2350                       u8 connection_handle, struct qed_ll2_stats *p_stats)
2351 {
2352         memset(p_stats, 0, sizeof(*p_stats));
2353         return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2354 }
2355
2356 static void qed_ll2b_release_rx_packet(void *cxt,
2357                                        u8 connection_handle,
2358                                        void *cookie,
2359                                        dma_addr_t rx_buf_addr,
2360                                        bool b_last_packet)
2361 {
2362         struct qed_hwfn *p_hwfn = cxt;
2363
2364         qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2365 }
2366
2367 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2368                                     const struct qed_ll2_cb_ops *ops,
2369                                     void *cookie)
2370 {
2371         cdev->ll2->cbs = ops;
2372         cdev->ll2->cb_cookie = cookie;
2373 }
2374
2375 static struct qed_ll2_cbs ll2_cbs = {
2376         .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2377         .rx_release_cb = &qed_ll2b_release_rx_packet,
2378         .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2379         .tx_release_cb = &qed_ll2b_complete_tx_packet,
2380 };
2381
2382 static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2383                                   struct qed_ll2_acquire_data *data,
2384                                   struct qed_ll2_params *params,
2385                                   enum qed_ll2_conn_type conn_type,
2386                                   u8 *handle, bool lb)
2387 {
2388         memset(data, 0, sizeof(*data));
2389
2390         data->input.conn_type = conn_type;
2391         data->input.mtu = params->mtu;
2392         data->input.rx_num_desc = QED_LL2_RX_SIZE;
2393         data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2394         data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2395         data->input.tx_num_desc = QED_LL2_TX_SIZE;
2396         data->p_connection_handle = handle;
2397         data->cbs = &ll2_cbs;
2398         ll2_cbs.cookie = p_hwfn;
2399
2400         if (lb) {
2401                 data->input.tx_tc = PKT_LB_TC;
2402                 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2403         } else {
2404                 data->input.tx_tc = 0;
2405                 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2406         }
2407 }
2408
2409 static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2410                              struct qed_ll2_params *params)
2411 {
2412         u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2413         struct qed_ll2_acquire_data data;
2414         int rc;
2415
2416         qed_ll2_set_conn_data(p_hwfn, &data, params,
2417                               QED_LL2_TYPE_OOO, handle, true);
2418
2419         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2420         if (rc) {
2421                 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2422                 goto out;
2423         }
2424
2425         rc = qed_ll2_establish_connection(p_hwfn, *handle);
2426         if (rc) {
2427                 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2428                 goto fail;
2429         }
2430
2431         return 0;
2432
2433 fail:
2434         qed_ll2_release_connection(p_hwfn, *handle);
2435 out:
2436         *handle = QED_LL2_UNUSED_HANDLE;
2437         return rc;
2438 }
2439
2440 static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2441 {
2442         return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2443                 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2444                 QED_IS_NVMETCP_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2445                 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2446 }
2447
2448 static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2449 {
2450         struct qed_dev *cdev = p_hwfn->cdev;
2451         int rc;
2452
2453         rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2454         if (rc)
2455                 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2456
2457         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2458
2459         return rc;
2460 }
2461
2462 static int qed_ll2_stop(struct qed_dev *cdev)
2463 {
2464         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2465         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2466         int rc = 0, rc2 = 0;
2467
2468         if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2469                 return 0;
2470         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2471                 qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2472
2473         qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2474         eth_zero_addr(cdev->ll2_mac_address);
2475
2476         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2477                 qed_ll2_stop_ooo(p_hwfn);
2478
2479         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2480         if (b_is_storage_eng1) {
2481                 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2482                 if (rc2)
2483                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2484                                   "Failed to stop LL2 on engine 0\n");
2485         }
2486
2487         rc = __qed_ll2_stop(p_hwfn);
2488         if (rc)
2489                 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2490
2491         qed_ll2_kill_buffers(cdev);
2492
2493         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2494
2495         return rc | rc2;
2496 }
2497
2498 static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2499                            struct qed_ll2_params *params)
2500 {
2501         struct qed_ll2_buffer *buffer, *tmp_buffer;
2502         struct qed_dev *cdev = p_hwfn->cdev;
2503         enum qed_ll2_conn_type conn_type;
2504         struct qed_ll2_acquire_data data;
2505         int rc, rx_cnt;
2506
2507         switch (p_hwfn->hw_info.personality) {
2508         case QED_PCI_FCOE:
2509                 conn_type = QED_LL2_TYPE_FCOE;
2510                 break;
2511         case QED_PCI_ISCSI:
2512         case QED_PCI_NVMETCP:
2513                 conn_type = QED_LL2_TYPE_TCP_ULP;
2514                 break;
2515         case QED_PCI_ETH_ROCE:
2516                 conn_type = QED_LL2_TYPE_ROCE;
2517                 break;
2518         default:
2519
2520                 conn_type = QED_LL2_TYPE_TEST;
2521         }
2522
2523         qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2524                               &cdev->ll2->handle, false);
2525
2526         rc = qed_ll2_acquire_connection(p_hwfn, &data);
2527         if (rc) {
2528                 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2529                 return rc;
2530         }
2531
2532         rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2533         if (rc) {
2534                 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2535                 goto release_conn;
2536         }
2537
2538         /* Post all Rx buffers to FW */
2539         spin_lock_bh(&cdev->ll2->lock);
2540         rx_cnt = cdev->ll2->rx_cnt;
2541         list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2542                 rc = qed_ll2_post_rx_buffer(p_hwfn,
2543                                             cdev->ll2->handle,
2544                                             buffer->phys_addr, 0, buffer, 1);
2545                 if (rc) {
2546                         DP_INFO(p_hwfn,
2547                                 "Failed to post an Rx buffer; Deleting it\n");
2548                         dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2549                                          cdev->ll2->rx_size, DMA_FROM_DEVICE);
2550                         kfree(buffer->data);
2551                         list_del(&buffer->list);
2552                         kfree(buffer);
2553                 } else {
2554                         rx_cnt++;
2555                 }
2556         }
2557         spin_unlock_bh(&cdev->ll2->lock);
2558
2559         if (rx_cnt == cdev->ll2->rx_cnt) {
2560                 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2561                 goto terminate_conn;
2562         }
2563         cdev->ll2->rx_cnt = rx_cnt;
2564
2565         return 0;
2566
2567 terminate_conn:
2568         qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2569 release_conn:
2570         qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2571         return rc;
2572 }
2573
2574 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2575 {
2576         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2577         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2578         struct qed_ll2_buffer *buffer;
2579         int rx_num_desc, i, rc;
2580
2581         if (!is_valid_ether_addr(params->ll2_mac_address)) {
2582                 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2583                 return -EINVAL;
2584         }
2585
2586         WARN_ON(!cdev->ll2->cbs);
2587
2588         /* Initialize LL2 locks & lists */
2589         INIT_LIST_HEAD(&cdev->ll2->list);
2590         spin_lock_init(&cdev->ll2->lock);
2591
2592         cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2593                              L1_CACHE_BYTES + params->mtu;
2594
2595         /* Allocate memory for LL2.
2596          * In CMT mode, in case of a storage PF which is affintized to engine 1,
2597          * LL2 is started also on engine 0 and thus we need twofold buffers.
2598          */
2599         rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2600         DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2601                 rx_num_desc, cdev->ll2->rx_size);
2602         for (i = 0; i < rx_num_desc; i++) {
2603                 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2604                 if (!buffer) {
2605                         DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2606                         rc = -ENOMEM;
2607                         goto err0;
2608                 }
2609
2610                 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2611                                           &buffer->phys_addr);
2612                 if (rc) {
2613                         kfree(buffer);
2614                         goto err0;
2615                 }
2616
2617                 list_add_tail(&buffer->list, &cdev->ll2->list);
2618         }
2619
2620         rc = __qed_ll2_start(p_hwfn, params);
2621         if (rc) {
2622                 DP_NOTICE(cdev, "Failed to start LL2\n");
2623                 goto err0;
2624         }
2625
2626         /* In CMT mode, always need to start LL2 on engine 0 for a storage PF,
2627          * since broadcast/mutlicast packets are routed to engine 0.
2628          */
2629         if (b_is_storage_eng1) {
2630                 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2631                 if (rc) {
2632                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2633                                   "Failed to start LL2 on engine 0\n");
2634                         goto err1;
2635                 }
2636         }
2637
2638         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2639                 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2640                 rc = qed_ll2_start_ooo(p_hwfn, params);
2641                 if (rc) {
2642                         DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2643                         goto err2;
2644                 }
2645         }
2646
2647         if (!QED_IS_NVMETCP_PERSONALITY(p_hwfn)) {
2648                 rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2649                 if (rc) {
2650                         DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2651                         goto err3;
2652                 }
2653         }
2654
2655         ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2656
2657         return 0;
2658
2659 err3:
2660         if (QED_IS_ISCSI_PERSONALITY(p_hwfn) || QED_IS_NVMETCP_PERSONALITY(p_hwfn))
2661                 qed_ll2_stop_ooo(p_hwfn);
2662 err2:
2663         if (b_is_storage_eng1)
2664                 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2665 err1:
2666         __qed_ll2_stop(p_hwfn);
2667 err0:
2668         qed_ll2_kill_buffers(cdev);
2669         cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2670         return rc;
2671 }
2672
2673 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2674                               unsigned long xmit_flags)
2675 {
2676         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2677         struct qed_ll2_tx_pkt_info pkt;
2678         const skb_frag_t *frag;
2679         u8 flags = 0, nr_frags;
2680         int rc = -EINVAL, i;
2681         dma_addr_t mapping;
2682         u16 vlan = 0;
2683
2684         if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2685                 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2686                 return -EINVAL;
2687         }
2688
2689         /* Cache number of fragments from SKB since SKB may be freed by
2690          * the completion routine after calling qed_ll2_prepare_tx_packet()
2691          */
2692         nr_frags = skb_shinfo(skb)->nr_frags;
2693
2694         if (unlikely(1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET)) {
2695                 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2696                        1 + nr_frags);
2697                 return -EINVAL;
2698         }
2699
2700         mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2701                                  skb->len, DMA_TO_DEVICE);
2702         if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2703                 DP_NOTICE(cdev, "SKB mapping failed\n");
2704                 return -EINVAL;
2705         }
2706
2707         /* Request HW to calculate IP csum */
2708         if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2709               ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2710                 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2711
2712         if (skb_vlan_tag_present(skb)) {
2713                 vlan = skb_vlan_tag_get(skb);
2714                 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2715         }
2716
2717         memset(&pkt, 0, sizeof(pkt));
2718         pkt.num_of_bds = 1 + nr_frags;
2719         pkt.vlan = vlan;
2720         pkt.bd_flags = flags;
2721         pkt.tx_dest = QED_LL2_TX_DEST_NW;
2722         pkt.first_frag = mapping;
2723         pkt.first_frag_len = skb->len;
2724         pkt.cookie = skb;
2725         if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2726             test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2727                 pkt.remove_stag = true;
2728
2729         /* qed_ll2_prepare_tx_packet() may actually send the packet if
2730          * there are no fragments in the skb and subsequently the completion
2731          * routine may run and free the SKB, so no dereferencing the SKB
2732          * beyond this point unless skb has any fragments.
2733          */
2734         rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2735                                        &pkt, 1);
2736         if (unlikely(rc))
2737                 goto err;
2738
2739         for (i = 0; i < nr_frags; i++) {
2740                 frag = &skb_shinfo(skb)->frags[i];
2741
2742                 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2743                                            skb_frag_size(frag), DMA_TO_DEVICE);
2744
2745                 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2746                         DP_NOTICE(cdev,
2747                                   "Unable to map frag - dropping packet\n");
2748                         rc = -ENOMEM;
2749                         goto err;
2750                 }
2751
2752                 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2753                                                        cdev->ll2->handle,
2754                                                        mapping,
2755                                                        skb_frag_size(frag));
2756
2757                 /* if failed not much to do here, partial packet has been posted
2758                  * we can't free memory, will need to wait for completion
2759                  */
2760                 if (unlikely(rc))
2761                         goto err2;
2762         }
2763
2764         return 0;
2765
2766 err:
2767         dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2768 err2:
2769         return rc;
2770 }
2771
2772 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2773 {
2774         bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2775         struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2776         int rc;
2777
2778         if (!cdev->ll2)
2779                 return -EINVAL;
2780
2781         rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2782         if (rc) {
2783                 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2784                 return rc;
2785         }
2786
2787         /* In CMT mode, LL2 is always started on engine 0 for a storage PF */
2788         if (b_is_storage_eng1) {
2789                 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2790                                          cdev->ll2->handle, stats);
2791                 if (rc) {
2792                         DP_NOTICE(QED_LEADING_HWFN(cdev),
2793                                   "Failed to get LL2 stats on engine 0\n");
2794                         return rc;
2795                 }
2796         }
2797
2798         return 0;
2799 }
2800
2801 const struct qed_ll2_ops qed_ll2_ops_pass = {
2802         .start = &qed_ll2_start,
2803         .stop = &qed_ll2_stop,
2804         .start_xmit = &qed_ll2_start_xmit,
2805         .register_cb_ops = &qed_ll2_register_cb_ops,
2806         .get_stats = &qed_ll2_stats,
2807 };
2808
2809 int qed_ll2_alloc_if(struct qed_dev *cdev)
2810 {
2811         cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2812         return cdev->ll2 ? 0 : -ENOMEM;
2813 }
2814
2815 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2816 {
2817         kfree(cdev->ll2);
2818         cdev->ll2 = NULL;
2819 }