1 /**************************************************************************/
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
44 /**************************************************************************/
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/if_arp.h>
65 #include <linux/ipv6.h>
66 #include <linux/irq.h>
67 #include <linux/kthread.h>
68 #include <linux/seq_file.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/workqueue.h>
78 #include <linux/if_vlan.h>
79 #include <linux/utsname.h>
83 static const char ibmvnic_driver_name[] = "ibmvnic";
84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
86 MODULE_AUTHOR("Santiago Leon");
87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92 static int ibmvnic_remove(struct vio_dev *);
93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static int send_request_unmap(struct ibmvnic_adapter *, u8);
114 static int send_login(struct ibmvnic_adapter *adapter);
115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
116 static int init_sub_crqs(struct ibmvnic_adapter *);
117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118 static int ibmvnic_init(struct ibmvnic_adapter *);
119 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
120 static void release_crq_queue(struct ibmvnic_adapter *);
121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
122 static int init_crq_queue(struct ibmvnic_adapter *adapter);
124 struct ibmvnic_stat {
125 char name[ETH_GSTRING_LEN];
129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
130 offsetof(struct ibmvnic_statistics, stat))
131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
133 static const struct ibmvnic_stat ibmvnic_stats[] = {
134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
159 unsigned long length, unsigned long *number,
162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
173 struct ibmvnic_long_term_buff *ltb, int size)
175 struct device *dev = &adapter->vdev->dev;
179 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
183 dev_err(dev, "Couldn't alloc long term buffer\n");
186 ltb->map_id = adapter->map_id;
189 init_completion(&adapter->fw_done);
190 rc = send_request_map(adapter, ltb->addr,
191 ltb->size, ltb->map_id);
193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
196 wait_for_completion(&adapter->fw_done);
198 if (adapter->fw_done_rc) {
199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
200 adapter->fw_done_rc);
201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
207 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
208 struct ibmvnic_long_term_buff *ltb)
210 struct device *dev = &adapter->vdev->dev;
215 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
216 adapter->reset_reason != VNIC_RESET_MOBILITY)
217 send_request_unmap(adapter, ltb->map_id);
218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
222 struct ibmvnic_long_term_buff *ltb)
226 memset(ltb->buff, 0, ltb->size);
228 init_completion(&adapter->fw_done);
229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
232 wait_for_completion(&adapter->fw_done);
234 if (adapter->fw_done_rc) {
235 dev_info(&adapter->vdev->dev,
236 "Reset failed, attempting to free and reallocate buffer\n");
237 free_long_term_buff(adapter, ltb);
238 return alloc_long_term_buff(adapter, ltb, ltb->size);
243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
249 adapter->rx_pool[i].active = 0;
252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
253 struct ibmvnic_rx_pool *pool)
255 int count = pool->size - atomic_read(&pool->available);
256 struct device *dev = &adapter->vdev->dev;
257 int buffers_added = 0;
258 unsigned long lpar_rc;
259 union sub_crq sub_crq;
272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
273 be32_to_cpu(adapter->login_rsp_buf->
276 for (i = 0; i < count; ++i) {
277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
279 dev_err(dev, "Couldn't replenish rx buff\n");
280 adapter->replenish_no_mem++;
284 index = pool->free_map[pool->next_free];
286 if (pool->rx_buff[index].skb)
287 dev_err(dev, "Inconsistent free_map!\n");
289 /* Copy the skb to the long term mapped DMA buffer */
290 offset = index * pool->buff_size;
291 dst = pool->long_term_buff.buff + offset;
292 memset(dst, 0, pool->buff_size);
293 dma_addr = pool->long_term_buff.addr + offset;
294 pool->rx_buff[index].data = dst;
296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
297 pool->rx_buff[index].dma = dma_addr;
298 pool->rx_buff[index].skb = skb;
299 pool->rx_buff[index].pool_index = pool->index;
300 pool->rx_buff[index].size = pool->buff_size;
302 memset(&sub_crq, 0, sizeof(sub_crq));
303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
304 sub_crq.rx_add.correlator =
305 cpu_to_be64((u64)&pool->rx_buff[index]);
306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
309 /* The length field of the sCRQ is defined to be 24 bits so the
310 * buffer size needs to be left shifted by a byte before it is
311 * converted to big endian to prevent the last byte from being
314 #ifdef __LITTLE_ENDIAN__
317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
319 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
321 if (lpar_rc != H_SUCCESS)
325 adapter->replenish_add_buff_success++;
326 pool->next_free = (pool->next_free + 1) % pool->size;
328 atomic_add(buffers_added, &pool->available);
332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
334 pool->free_map[pool->next_free] = index;
335 pool->rx_buff[index].skb = NULL;
337 dev_kfree_skb_any(skb);
338 adapter->replenish_add_buff_failure++;
339 atomic_add(buffers_added, &pool->available);
341 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
342 /* Disable buffer pool replenishment and report carrier off if
343 * queue is closed or pending failover.
344 * Firmware guarantees that a signal will be sent to the
345 * driver, triggering a reset.
347 deactivate_rx_pools(adapter);
348 netif_carrier_off(adapter->netdev);
352 static void replenish_pools(struct ibmvnic_adapter *adapter)
356 adapter->replenish_task_cycles++;
357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
359 if (adapter->rx_pool[i].active)
360 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
364 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
366 kfree(adapter->tx_stats_buffers);
367 kfree(adapter->rx_stats_buffers);
368 adapter->tx_stats_buffers = NULL;
369 adapter->rx_stats_buffers = NULL;
372 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
374 adapter->tx_stats_buffers =
375 kcalloc(IBMVNIC_MAX_QUEUES,
376 sizeof(struct ibmvnic_tx_queue_stats),
378 if (!adapter->tx_stats_buffers)
381 adapter->rx_stats_buffers =
382 kcalloc(IBMVNIC_MAX_QUEUES,
383 sizeof(struct ibmvnic_rx_queue_stats),
385 if (!adapter->rx_stats_buffers)
391 static void release_stats_token(struct ibmvnic_adapter *adapter)
393 struct device *dev = &adapter->vdev->dev;
395 if (!adapter->stats_token)
398 dma_unmap_single(dev, adapter->stats_token,
399 sizeof(struct ibmvnic_statistics),
401 adapter->stats_token = 0;
404 static int init_stats_token(struct ibmvnic_adapter *adapter)
406 struct device *dev = &adapter->vdev->dev;
409 stok = dma_map_single(dev, &adapter->stats,
410 sizeof(struct ibmvnic_statistics),
412 if (dma_mapping_error(dev, stok)) {
413 dev_err(dev, "Couldn't map stats buffer\n");
417 adapter->stats_token = stok;
418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
422 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
424 struct ibmvnic_rx_pool *rx_pool;
429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
433 for (i = 0; i < rx_scrqs; i++) {
434 rx_pool = &adapter->rx_pool[i];
436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
439 free_long_term_buff(adapter, &rx_pool->long_term_buff);
440 rx_pool->buff_size = be64_to_cpu(size_array[i]);
441 rc = alloc_long_term_buff(adapter,
442 &rx_pool->long_term_buff,
446 rc = reset_long_term_buff(adapter,
447 &rx_pool->long_term_buff);
453 for (j = 0; j < rx_pool->size; j++)
454 rx_pool->free_map[j] = j;
456 memset(rx_pool->rx_buff, 0,
457 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
459 atomic_set(&rx_pool->available, 0);
460 rx_pool->next_alloc = 0;
461 rx_pool->next_free = 0;
468 static void release_rx_pools(struct ibmvnic_adapter *adapter)
470 struct ibmvnic_rx_pool *rx_pool;
473 if (!adapter->rx_pool)
476 for (i = 0; i < adapter->num_active_rx_pools; i++) {
477 rx_pool = &adapter->rx_pool[i];
479 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
481 kfree(rx_pool->free_map);
482 free_long_term_buff(adapter, &rx_pool->long_term_buff);
484 if (!rx_pool->rx_buff)
487 for (j = 0; j < rx_pool->size; j++) {
488 if (rx_pool->rx_buff[j].skb) {
489 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
490 rx_pool->rx_buff[j].skb = NULL;
494 kfree(rx_pool->rx_buff);
497 kfree(adapter->rx_pool);
498 adapter->rx_pool = NULL;
499 adapter->num_active_rx_pools = 0;
502 static int init_rx_pools(struct net_device *netdev)
504 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
505 struct device *dev = &adapter->vdev->dev;
506 struct ibmvnic_rx_pool *rx_pool;
512 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
513 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
514 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
516 adapter->rx_pool = kcalloc(rxadd_subcrqs,
517 sizeof(struct ibmvnic_rx_pool),
519 if (!adapter->rx_pool) {
520 dev_err(dev, "Failed to allocate rx pools\n");
524 adapter->num_active_rx_pools = rxadd_subcrqs;
526 for (i = 0; i < rxadd_subcrqs; i++) {
527 rx_pool = &adapter->rx_pool[i];
529 netdev_dbg(adapter->netdev,
530 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
531 i, adapter->req_rx_add_entries_per_subcrq,
532 be64_to_cpu(size_array[i]));
534 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
536 rx_pool->buff_size = be64_to_cpu(size_array[i]);
539 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
541 if (!rx_pool->free_map) {
542 release_rx_pools(adapter);
546 rx_pool->rx_buff = kcalloc(rx_pool->size,
547 sizeof(struct ibmvnic_rx_buff),
549 if (!rx_pool->rx_buff) {
550 dev_err(dev, "Couldn't alloc rx buffers\n");
551 release_rx_pools(adapter);
555 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
556 rx_pool->size * rx_pool->buff_size)) {
557 release_rx_pools(adapter);
561 for (j = 0; j < rx_pool->size; ++j)
562 rx_pool->free_map[j] = j;
564 atomic_set(&rx_pool->available, 0);
565 rx_pool->next_alloc = 0;
566 rx_pool->next_free = 0;
572 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
573 struct ibmvnic_tx_pool *tx_pool)
577 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
581 memset(tx_pool->tx_buff, 0,
582 tx_pool->num_buffers *
583 sizeof(struct ibmvnic_tx_buff));
585 for (i = 0; i < tx_pool->num_buffers; i++)
586 tx_pool->free_map[i] = i;
588 tx_pool->consumer_index = 0;
589 tx_pool->producer_index = 0;
594 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
599 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
600 for (i = 0; i < tx_scrqs; i++) {
601 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
604 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
612 static void release_vpd_data(struct ibmvnic_adapter *adapter)
617 kfree(adapter->vpd->buff);
623 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
624 struct ibmvnic_tx_pool *tx_pool)
626 kfree(tx_pool->tx_buff);
627 kfree(tx_pool->free_map);
628 free_long_term_buff(adapter, &tx_pool->long_term_buff);
631 static void release_tx_pools(struct ibmvnic_adapter *adapter)
635 if (!adapter->tx_pool)
638 for (i = 0; i < adapter->num_active_tx_pools; i++) {
639 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
640 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
643 kfree(adapter->tx_pool);
644 adapter->tx_pool = NULL;
645 kfree(adapter->tso_pool);
646 adapter->tso_pool = NULL;
647 adapter->num_active_tx_pools = 0;
650 static int init_one_tx_pool(struct net_device *netdev,
651 struct ibmvnic_tx_pool *tx_pool,
652 int num_entries, int buf_size)
654 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
657 tx_pool->tx_buff = kcalloc(num_entries,
658 sizeof(struct ibmvnic_tx_buff),
660 if (!tx_pool->tx_buff)
663 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
664 num_entries * buf_size))
667 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
668 if (!tx_pool->free_map)
671 for (i = 0; i < num_entries; i++)
672 tx_pool->free_map[i] = i;
674 tx_pool->consumer_index = 0;
675 tx_pool->producer_index = 0;
676 tx_pool->num_buffers = num_entries;
677 tx_pool->buf_size = buf_size;
682 static int init_tx_pools(struct net_device *netdev)
684 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
688 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
689 adapter->tx_pool = kcalloc(tx_subcrqs,
690 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
691 if (!adapter->tx_pool)
694 adapter->tso_pool = kcalloc(tx_subcrqs,
695 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
696 if (!adapter->tso_pool)
699 adapter->num_active_tx_pools = tx_subcrqs;
701 for (i = 0; i < tx_subcrqs; i++) {
702 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
703 adapter->req_tx_entries_per_subcrq,
704 adapter->req_mtu + VLAN_HLEN);
706 release_tx_pools(adapter);
710 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
714 release_tx_pools(adapter);
722 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
726 if (adapter->napi_enabled)
729 for (i = 0; i < adapter->req_rx_queues; i++)
730 napi_enable(&adapter->napi[i]);
732 adapter->napi_enabled = true;
735 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
739 if (!adapter->napi_enabled)
742 for (i = 0; i < adapter->req_rx_queues; i++) {
743 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
744 napi_disable(&adapter->napi[i]);
747 adapter->napi_enabled = false;
750 static int init_napi(struct ibmvnic_adapter *adapter)
754 adapter->napi = kcalloc(adapter->req_rx_queues,
755 sizeof(struct napi_struct), GFP_KERNEL);
759 for (i = 0; i < adapter->req_rx_queues; i++) {
760 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
761 netif_napi_add(adapter->netdev, &adapter->napi[i],
762 ibmvnic_poll, NAPI_POLL_WEIGHT);
765 adapter->num_active_rx_napi = adapter->req_rx_queues;
769 static void release_napi(struct ibmvnic_adapter *adapter)
776 for (i = 0; i < adapter->num_active_rx_napi; i++) {
777 if (&adapter->napi[i]) {
778 netdev_dbg(adapter->netdev,
779 "Releasing napi[%d]\n", i);
780 netif_napi_del(&adapter->napi[i]);
784 kfree(adapter->napi);
785 adapter->napi = NULL;
786 adapter->num_active_rx_napi = 0;
787 adapter->napi_enabled = false;
790 static int ibmvnic_login(struct net_device *netdev)
792 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
793 unsigned long timeout = msecs_to_jiffies(30000);
800 if (retry_count > IBMVNIC_MAX_QUEUES) {
801 netdev_warn(netdev, "Login attempts exceeded\n");
805 adapter->init_done_rc = 0;
806 reinit_completion(&adapter->init_done);
807 rc = send_login(adapter);
809 netdev_warn(netdev, "Unable to login\n");
813 if (!wait_for_completion_timeout(&adapter->init_done,
815 netdev_warn(netdev, "Login timed out\n");
819 if (adapter->init_done_rc == PARTIALSUCCESS) {
821 release_sub_crqs(adapter, 1);
825 "Received partial success, retrying...\n");
826 adapter->init_done_rc = 0;
827 reinit_completion(&adapter->init_done);
828 send_cap_queries(adapter);
829 if (!wait_for_completion_timeout(&adapter->init_done,
832 "Capabilities query timed out\n");
836 rc = init_sub_crqs(adapter);
839 "SCRQ initialization failed\n");
843 rc = init_sub_crq_irqs(adapter);
846 "SCRQ irq initialization failed\n");
849 } else if (adapter->init_done_rc) {
850 netdev_warn(netdev, "Adapter login failed\n");
855 /* handle pending MAC address changes after successful login */
856 if (adapter->mac_change_pending) {
857 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
858 adapter->mac_change_pending = false;
864 static void release_login_buffer(struct ibmvnic_adapter *adapter)
866 kfree(adapter->login_buf);
867 adapter->login_buf = NULL;
870 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
872 kfree(adapter->login_rsp_buf);
873 adapter->login_rsp_buf = NULL;
876 static void release_resources(struct ibmvnic_adapter *adapter)
878 release_vpd_data(adapter);
880 release_tx_pools(adapter);
881 release_rx_pools(adapter);
883 release_napi(adapter);
884 release_login_rsp_buffer(adapter);
887 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
889 struct net_device *netdev = adapter->netdev;
890 unsigned long timeout = msecs_to_jiffies(30000);
891 union ibmvnic_crq crq;
895 netdev_dbg(netdev, "setting link state %d\n", link_state);
897 memset(&crq, 0, sizeof(crq));
898 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
899 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
900 crq.logical_link_state.link_state = link_state;
905 reinit_completion(&adapter->init_done);
906 rc = ibmvnic_send_crq(adapter, &crq);
908 netdev_err(netdev, "Failed to set link state\n");
912 if (!wait_for_completion_timeout(&adapter->init_done,
914 netdev_err(netdev, "timeout setting link state\n");
918 if (adapter->init_done_rc == 1) {
919 /* Partuial success, delay and re-send */
922 } else if (adapter->init_done_rc) {
923 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
924 adapter->init_done_rc);
925 return adapter->init_done_rc;
932 static int set_real_num_queues(struct net_device *netdev)
934 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
937 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
938 adapter->req_tx_queues, adapter->req_rx_queues);
940 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
942 netdev_err(netdev, "failed to set the number of tx queues\n");
946 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
948 netdev_err(netdev, "failed to set the number of rx queues\n");
953 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
955 struct device *dev = &adapter->vdev->dev;
956 union ibmvnic_crq crq;
960 if (adapter->vpd->buff)
961 len = adapter->vpd->len;
963 init_completion(&adapter->fw_done);
964 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
965 crq.get_vpd_size.cmd = GET_VPD_SIZE;
966 rc = ibmvnic_send_crq(adapter, &crq);
969 wait_for_completion(&adapter->fw_done);
971 if (!adapter->vpd->len)
974 if (!adapter->vpd->buff)
975 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
976 else if (adapter->vpd->len != len)
978 krealloc(adapter->vpd->buff,
979 adapter->vpd->len, GFP_KERNEL);
981 if (!adapter->vpd->buff) {
982 dev_err(dev, "Could allocate VPD buffer\n");
986 adapter->vpd->dma_addr =
987 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
989 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
990 dev_err(dev, "Could not map VPD buffer\n");
991 kfree(adapter->vpd->buff);
992 adapter->vpd->buff = NULL;
996 reinit_completion(&adapter->fw_done);
997 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
998 crq.get_vpd.cmd = GET_VPD;
999 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1000 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1001 rc = ibmvnic_send_crq(adapter, &crq);
1003 kfree(adapter->vpd->buff);
1004 adapter->vpd->buff = NULL;
1007 wait_for_completion(&adapter->fw_done);
1012 static int init_resources(struct ibmvnic_adapter *adapter)
1014 struct net_device *netdev = adapter->netdev;
1017 rc = set_real_num_queues(netdev);
1021 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1025 /* Vital Product Data (VPD) */
1026 rc = ibmvnic_get_vpd(adapter);
1028 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1032 adapter->map_id = 1;
1034 rc = init_napi(adapter);
1038 send_map_query(adapter);
1040 rc = init_rx_pools(netdev);
1044 rc = init_tx_pools(netdev);
1048 static int __ibmvnic_open(struct net_device *netdev)
1050 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1051 enum vnic_state prev_state = adapter->state;
1054 adapter->state = VNIC_OPENING;
1055 replenish_pools(adapter);
1056 ibmvnic_napi_enable(adapter);
1058 /* We're ready to receive frames, enable the sub-crq interrupts and
1059 * set the logical link state to up
1061 for (i = 0; i < adapter->req_rx_queues; i++) {
1062 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1063 if (prev_state == VNIC_CLOSED)
1064 enable_irq(adapter->rx_scrq[i]->irq);
1065 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1068 for (i = 0; i < adapter->req_tx_queues; i++) {
1069 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1070 if (prev_state == VNIC_CLOSED)
1071 enable_irq(adapter->tx_scrq[i]->irq);
1072 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1075 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1077 for (i = 0; i < adapter->req_rx_queues; i++)
1078 napi_disable(&adapter->napi[i]);
1079 release_resources(adapter);
1083 netif_tx_start_all_queues(netdev);
1085 if (prev_state == VNIC_CLOSED) {
1086 for (i = 0; i < adapter->req_rx_queues; i++)
1087 napi_schedule(&adapter->napi[i]);
1090 adapter->state = VNIC_OPEN;
1094 static int ibmvnic_open(struct net_device *netdev)
1096 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1099 /* If device failover is pending, just set device state and return.
1100 * Device operation will be handled by reset routine.
1102 if (adapter->failover_pending) {
1103 adapter->state = VNIC_OPEN;
1107 if (adapter->state != VNIC_CLOSED) {
1108 rc = ibmvnic_login(netdev);
1112 rc = init_resources(adapter);
1114 netdev_err(netdev, "failed to initialize resources\n");
1115 release_resources(adapter);
1120 rc = __ibmvnic_open(netdev);
1121 netif_carrier_on(netdev);
1126 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1128 struct ibmvnic_rx_pool *rx_pool;
1129 struct ibmvnic_rx_buff *rx_buff;
1134 if (!adapter->rx_pool)
1137 rx_scrqs = adapter->num_active_rx_pools;
1138 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1140 /* Free any remaining skbs in the rx buffer pools */
1141 for (i = 0; i < rx_scrqs; i++) {
1142 rx_pool = &adapter->rx_pool[i];
1143 if (!rx_pool || !rx_pool->rx_buff)
1146 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1147 for (j = 0; j < rx_entries; j++) {
1148 rx_buff = &rx_pool->rx_buff[j];
1149 if (rx_buff && rx_buff->skb) {
1150 dev_kfree_skb_any(rx_buff->skb);
1151 rx_buff->skb = NULL;
1157 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1158 struct ibmvnic_tx_pool *tx_pool)
1160 struct ibmvnic_tx_buff *tx_buff;
1164 if (!tx_pool || !tx_pool->tx_buff)
1167 tx_entries = tx_pool->num_buffers;
1169 for (i = 0; i < tx_entries; i++) {
1170 tx_buff = &tx_pool->tx_buff[i];
1171 if (tx_buff && tx_buff->skb) {
1172 dev_kfree_skb_any(tx_buff->skb);
1173 tx_buff->skb = NULL;
1178 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1183 if (!adapter->tx_pool || !adapter->tso_pool)
1186 tx_scrqs = adapter->num_active_tx_pools;
1188 /* Free any remaining skbs in the tx buffer pools */
1189 for (i = 0; i < tx_scrqs; i++) {
1190 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1191 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1192 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1196 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1198 struct net_device *netdev = adapter->netdev;
1201 if (adapter->tx_scrq) {
1202 for (i = 0; i < adapter->req_tx_queues; i++)
1203 if (adapter->tx_scrq[i]->irq) {
1205 "Disabling tx_scrq[%d] irq\n", i);
1206 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1207 disable_irq(adapter->tx_scrq[i]->irq);
1211 if (adapter->rx_scrq) {
1212 for (i = 0; i < adapter->req_rx_queues; i++) {
1213 if (adapter->rx_scrq[i]->irq) {
1215 "Disabling rx_scrq[%d] irq\n", i);
1216 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1217 disable_irq(adapter->rx_scrq[i]->irq);
1223 static void ibmvnic_cleanup(struct net_device *netdev)
1225 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1227 /* ensure that transmissions are stopped if called by do_reset */
1228 if (adapter->resetting)
1229 netif_tx_disable(netdev);
1231 netif_tx_stop_all_queues(netdev);
1233 ibmvnic_napi_disable(adapter);
1234 ibmvnic_disable_irqs(adapter);
1236 clean_rx_pools(adapter);
1237 clean_tx_pools(adapter);
1240 static int __ibmvnic_close(struct net_device *netdev)
1242 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1245 adapter->state = VNIC_CLOSING;
1246 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1249 adapter->state = VNIC_CLOSED;
1253 static int ibmvnic_close(struct net_device *netdev)
1255 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1258 /* If device failover is pending, just set device state and return.
1259 * Device operation will be handled by reset routine.
1261 if (adapter->failover_pending) {
1262 adapter->state = VNIC_CLOSED;
1266 rc = __ibmvnic_close(netdev);
1267 ibmvnic_cleanup(netdev);
1273 * build_hdr_data - creates L2/L3/L4 header data buffer
1274 * @hdr_field - bitfield determining needed headers
1275 * @skb - socket buffer
1276 * @hdr_len - array of header lengths
1277 * @tot_len - total length of data
1279 * Reads hdr_field to determine which headers are needed by firmware.
1280 * Builds a buffer containing these headers. Saves individual header
1281 * lengths and total buffer length to be used to build descriptors.
1283 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1284 int *hdr_len, u8 *hdr_data)
1289 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1290 hdr_len[0] = sizeof(struct vlan_ethhdr);
1292 hdr_len[0] = sizeof(struct ethhdr);
1294 if (skb->protocol == htons(ETH_P_IP)) {
1295 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1296 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1297 hdr_len[2] = tcp_hdrlen(skb);
1298 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1299 hdr_len[2] = sizeof(struct udphdr);
1300 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1301 hdr_len[1] = sizeof(struct ipv6hdr);
1302 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1303 hdr_len[2] = tcp_hdrlen(skb);
1304 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1305 hdr_len[2] = sizeof(struct udphdr);
1306 } else if (skb->protocol == htons(ETH_P_ARP)) {
1307 hdr_len[1] = arp_hdr_len(skb->dev);
1311 memset(hdr_data, 0, 120);
1312 if ((hdr_field >> 6) & 1) {
1313 hdr = skb_mac_header(skb);
1314 memcpy(hdr_data, hdr, hdr_len[0]);
1318 if ((hdr_field >> 5) & 1) {
1319 hdr = skb_network_header(skb);
1320 memcpy(hdr_data + len, hdr, hdr_len[1]);
1324 if ((hdr_field >> 4) & 1) {
1325 hdr = skb_transport_header(skb);
1326 memcpy(hdr_data + len, hdr, hdr_len[2]);
1333 * create_hdr_descs - create header and header extension descriptors
1334 * @hdr_field - bitfield determining needed headers
1335 * @data - buffer containing header data
1336 * @len - length of data buffer
1337 * @hdr_len - array of individual header lengths
1338 * @scrq_arr - descriptor array
1340 * Creates header and, if needed, header extension descriptors and
1341 * places them in a descriptor array, scrq_arr
1344 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1345 union sub_crq *scrq_arr)
1347 union sub_crq hdr_desc;
1353 while (tmp_len > 0) {
1354 cur = hdr_data + len - tmp_len;
1356 memset(&hdr_desc, 0, sizeof(hdr_desc));
1357 if (cur != hdr_data) {
1358 data = hdr_desc.hdr_ext.data;
1359 tmp = tmp_len > 29 ? 29 : tmp_len;
1360 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1361 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1362 hdr_desc.hdr_ext.len = tmp;
1364 data = hdr_desc.hdr.data;
1365 tmp = tmp_len > 24 ? 24 : tmp_len;
1366 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1367 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1368 hdr_desc.hdr.len = tmp;
1369 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1370 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1371 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1372 hdr_desc.hdr.flag = hdr_field << 1;
1374 memcpy(data, cur, tmp);
1376 *scrq_arr = hdr_desc;
1385 * build_hdr_descs_arr - build a header descriptor array
1386 * @skb - socket buffer
1387 * @num_entries - number of descriptors to be sent
1388 * @subcrq - first TX descriptor
1389 * @hdr_field - bit field determining which headers will be sent
1391 * This function will build a TX descriptor array with applicable
1392 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1395 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1396 int *num_entries, u8 hdr_field)
1398 int hdr_len[3] = {0, 0, 0};
1400 u8 *hdr_data = txbuff->hdr_data;
1402 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1404 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1405 txbuff->indir_arr + 1);
1408 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1409 struct net_device *netdev)
1411 /* For some backing devices, mishandling of small packets
1412 * can result in a loss of connection or TX stall. Device
1413 * architects recommend that no packet should be smaller
1414 * than the minimum MTU value provided to the driver, so
1415 * pad any packets to that length
1417 if (skb->len < netdev->min_mtu)
1418 return skb_put_padto(skb, netdev->min_mtu);
1423 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1425 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1426 int queue_num = skb_get_queue_mapping(skb);
1427 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1428 struct device *dev = &adapter->vdev->dev;
1429 struct ibmvnic_tx_buff *tx_buff = NULL;
1430 struct ibmvnic_sub_crq_queue *tx_scrq;
1431 struct ibmvnic_tx_pool *tx_pool;
1432 unsigned int tx_send_failed = 0;
1433 unsigned int tx_map_failed = 0;
1434 unsigned int tx_dropped = 0;
1435 unsigned int tx_packets = 0;
1436 unsigned int tx_bytes = 0;
1437 dma_addr_t data_dma_addr;
1438 struct netdev_queue *txq;
1439 unsigned long lpar_rc;
1440 union sub_crq tx_crq;
1441 unsigned int offset;
1442 int num_entries = 1;
1449 if (adapter->resetting) {
1450 if (!netif_subqueue_stopped(netdev, skb))
1451 netif_stop_subqueue(netdev, queue_num);
1452 dev_kfree_skb_any(skb);
1460 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1466 if (skb_is_gso(skb))
1467 tx_pool = &adapter->tso_pool[queue_num];
1469 tx_pool = &adapter->tx_pool[queue_num];
1471 tx_scrq = adapter->tx_scrq[queue_num];
1472 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1473 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1474 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1476 index = tx_pool->free_map[tx_pool->consumer_index];
1478 if (index == IBMVNIC_INVALID_MAP) {
1479 dev_kfree_skb_any(skb);
1486 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1488 offset = index * tx_pool->buf_size;
1489 dst = tx_pool->long_term_buff.buff + offset;
1490 memset(dst, 0, tx_pool->buf_size);
1491 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1493 if (skb_shinfo(skb)->nr_frags) {
1497 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1498 cur = skb_headlen(skb);
1500 /* Copy the frags */
1501 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1502 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1505 page_address(skb_frag_page(frag)) +
1506 frag->page_offset, skb_frag_size(frag));
1507 cur += skb_frag_size(frag);
1510 skb_copy_from_linear_data(skb, dst, skb->len);
1513 tx_pool->consumer_index =
1514 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1516 tx_buff = &tx_pool->tx_buff[index];
1518 tx_buff->data_dma[0] = data_dma_addr;
1519 tx_buff->data_len[0] = skb->len;
1520 tx_buff->index = index;
1521 tx_buff->pool_index = queue_num;
1522 tx_buff->last_frag = true;
1524 memset(&tx_crq, 0, sizeof(tx_crq));
1525 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1526 tx_crq.v1.type = IBMVNIC_TX_DESC;
1527 tx_crq.v1.n_crq_elem = 1;
1528 tx_crq.v1.n_sge = 1;
1529 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1531 if (skb_is_gso(skb))
1532 tx_crq.v1.correlator =
1533 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1535 tx_crq.v1.correlator = cpu_to_be32(index);
1536 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1537 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1538 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1540 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1541 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1542 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1545 if (skb->protocol == htons(ETH_P_IP)) {
1546 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1547 proto = ip_hdr(skb)->protocol;
1548 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1549 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1550 proto = ipv6_hdr(skb)->nexthdr;
1553 if (proto == IPPROTO_TCP)
1554 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1555 else if (proto == IPPROTO_UDP)
1556 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1558 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1559 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1562 if (skb_is_gso(skb)) {
1563 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1564 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1567 /* determine if l2/3/4 headers are sent to firmware */
1568 if ((*hdrs >> 7) & 1) {
1569 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1570 tx_crq.v1.n_crq_elem = num_entries;
1571 tx_buff->num_entries = num_entries;
1572 tx_buff->indir_arr[0] = tx_crq;
1573 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1574 sizeof(tx_buff->indir_arr),
1576 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1577 dev_kfree_skb_any(skb);
1578 tx_buff->skb = NULL;
1579 if (!firmware_has_feature(FW_FEATURE_CMO))
1580 dev_err(dev, "tx: unable to map descriptor array\n");
1586 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1587 (u64)tx_buff->indir_dma,
1589 dma_unmap_single(dev, tx_buff->indir_dma,
1590 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1592 tx_buff->num_entries = num_entries;
1593 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1596 if (lpar_rc != H_SUCCESS) {
1597 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1598 dev_err_ratelimited(dev, "tx: send failed\n");
1599 dev_kfree_skb_any(skb);
1600 tx_buff->skb = NULL;
1602 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1603 /* Disable TX and report carrier off if queue is closed
1604 * or pending failover.
1605 * Firmware guarantees that a signal will be sent to the
1606 * driver, triggering a reset or some other action.
1608 netif_tx_stop_all_queues(netdev);
1609 netif_carrier_off(netdev);
1618 if (atomic_add_return(num_entries, &tx_scrq->used)
1619 >= adapter->req_tx_entries_per_subcrq) {
1620 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1621 netif_stop_subqueue(netdev, queue_num);
1625 tx_bytes += skb->len;
1626 txq->trans_start = jiffies;
1631 /* roll back consumer index and map array*/
1632 if (tx_pool->consumer_index == 0)
1633 tx_pool->consumer_index =
1634 tx_pool->num_buffers - 1;
1636 tx_pool->consumer_index--;
1637 tx_pool->free_map[tx_pool->consumer_index] = index;
1639 netdev->stats.tx_dropped += tx_dropped;
1640 netdev->stats.tx_bytes += tx_bytes;
1641 netdev->stats.tx_packets += tx_packets;
1642 adapter->tx_send_failed += tx_send_failed;
1643 adapter->tx_map_failed += tx_map_failed;
1644 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1645 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1646 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1651 static void ibmvnic_set_multi(struct net_device *netdev)
1653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1654 struct netdev_hw_addr *ha;
1655 union ibmvnic_crq crq;
1657 memset(&crq, 0, sizeof(crq));
1658 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1659 crq.request_capability.cmd = REQUEST_CAPABILITY;
1661 if (netdev->flags & IFF_PROMISC) {
1662 if (!adapter->promisc_supported)
1665 if (netdev->flags & IFF_ALLMULTI) {
1666 /* Accept all multicast */
1667 memset(&crq, 0, sizeof(crq));
1668 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1669 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1670 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1671 ibmvnic_send_crq(adapter, &crq);
1672 } else if (netdev_mc_empty(netdev)) {
1673 /* Reject all multicast */
1674 memset(&crq, 0, sizeof(crq));
1675 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1676 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1677 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1678 ibmvnic_send_crq(adapter, &crq);
1680 /* Accept one or more multicast(s) */
1681 netdev_for_each_mc_addr(ha, netdev) {
1682 memset(&crq, 0, sizeof(crq));
1683 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1684 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1685 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1686 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1688 ibmvnic_send_crq(adapter, &crq);
1694 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1696 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1697 struct sockaddr *addr = p;
1698 union ibmvnic_crq crq;
1701 if (!is_valid_ether_addr(addr->sa_data))
1702 return -EADDRNOTAVAIL;
1704 memset(&crq, 0, sizeof(crq));
1705 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1706 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1707 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1709 init_completion(&adapter->fw_done);
1710 rc = ibmvnic_send_crq(adapter, &crq);
1713 wait_for_completion(&adapter->fw_done);
1714 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1715 return adapter->fw_done_rc ? -EIO : 0;
1718 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1720 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1721 struct sockaddr *addr = p;
1724 if (adapter->state == VNIC_PROBED) {
1725 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1726 adapter->mac_change_pending = true;
1730 rc = __ibmvnic_set_mac(netdev, addr);
1736 * do_reset returns zero if we are able to keep processing reset events, or
1737 * non-zero if we hit a fatal error and must halt.
1739 static int do_reset(struct ibmvnic_adapter *adapter,
1740 struct ibmvnic_rwi *rwi, u32 reset_state)
1742 u64 old_num_rx_queues, old_num_tx_queues;
1743 u64 old_num_rx_slots, old_num_tx_slots;
1744 struct net_device *netdev = adapter->netdev;
1747 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1750 netif_carrier_off(netdev);
1751 adapter->reset_reason = rwi->reset_reason;
1753 old_num_rx_queues = adapter->req_rx_queues;
1754 old_num_tx_queues = adapter->req_tx_queues;
1755 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1756 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1758 ibmvnic_cleanup(netdev);
1760 if (reset_state == VNIC_OPEN &&
1761 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1762 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1763 rc = __ibmvnic_close(netdev);
1768 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1769 adapter->wait_for_reset) {
1770 release_resources(adapter);
1771 release_sub_crqs(adapter, 1);
1772 release_crq_queue(adapter);
1775 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1776 /* remove the closed state so when we call open it appears
1777 * we are coming from the probed state.
1779 adapter->state = VNIC_PROBED;
1781 if (adapter->wait_for_reset) {
1782 rc = init_crq_queue(adapter);
1783 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1784 rc = ibmvnic_reenable_crq_queue(adapter);
1785 release_sub_crqs(adapter, 1);
1787 rc = ibmvnic_reset_crq(adapter);
1789 rc = vio_enable_interrupts(adapter->vdev);
1793 netdev_err(adapter->netdev,
1794 "Couldn't initialize crq. rc=%d\n", rc);
1798 rc = ibmvnic_reset_init(adapter);
1800 return IBMVNIC_INIT_FAILED;
1802 /* If the adapter was in PROBE state prior to the reset,
1805 if (reset_state == VNIC_PROBED)
1808 rc = ibmvnic_login(netdev);
1810 adapter->state = reset_state;
1814 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1815 adapter->wait_for_reset) {
1816 rc = init_resources(adapter);
1819 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1820 adapter->req_tx_queues != old_num_tx_queues ||
1821 adapter->req_rx_add_entries_per_subcrq !=
1823 adapter->req_tx_entries_per_subcrq !=
1825 release_rx_pools(adapter);
1826 release_tx_pools(adapter);
1827 release_napi(adapter);
1828 release_vpd_data(adapter);
1830 rc = init_resources(adapter);
1835 rc = reset_tx_pools(adapter);
1839 rc = reset_rx_pools(adapter);
1843 ibmvnic_disable_irqs(adapter);
1845 adapter->state = VNIC_CLOSED;
1847 if (reset_state == VNIC_CLOSED)
1850 rc = __ibmvnic_open(netdev);
1852 if (list_empty(&adapter->rwi_list))
1853 adapter->state = VNIC_CLOSED;
1855 adapter->state = reset_state;
1860 /* refresh device's multicast list */
1861 ibmvnic_set_multi(netdev);
1864 for (i = 0; i < adapter->req_rx_queues; i++)
1865 napi_schedule(&adapter->napi[i]);
1867 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1868 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1869 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1871 netif_carrier_on(netdev);
1876 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1877 struct ibmvnic_rwi *rwi, u32 reset_state)
1879 struct net_device *netdev = adapter->netdev;
1882 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1885 netif_carrier_off(netdev);
1886 adapter->reset_reason = rwi->reset_reason;
1888 ibmvnic_cleanup(netdev);
1889 release_resources(adapter);
1890 release_sub_crqs(adapter, 0);
1891 release_crq_queue(adapter);
1893 /* remove the closed state so when we call open it appears
1894 * we are coming from the probed state.
1896 adapter->state = VNIC_PROBED;
1898 reinit_completion(&adapter->init_done);
1899 rc = init_crq_queue(adapter);
1901 netdev_err(adapter->netdev,
1902 "Couldn't initialize crq. rc=%d\n", rc);
1906 rc = ibmvnic_init(adapter);
1910 /* If the adapter was in PROBE state prior to the reset,
1913 if (reset_state == VNIC_PROBED)
1916 rc = ibmvnic_login(netdev);
1918 adapter->state = VNIC_PROBED;
1922 rc = init_resources(adapter);
1926 ibmvnic_disable_irqs(adapter);
1927 adapter->state = VNIC_CLOSED;
1929 if (reset_state == VNIC_CLOSED)
1932 rc = __ibmvnic_open(netdev);
1934 if (list_empty(&adapter->rwi_list))
1935 adapter->state = VNIC_CLOSED;
1937 adapter->state = reset_state;
1942 netif_carrier_on(netdev);
1947 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1949 struct ibmvnic_rwi *rwi;
1950 unsigned long flags;
1952 spin_lock_irqsave(&adapter->rwi_lock, flags);
1954 if (!list_empty(&adapter->rwi_list)) {
1955 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1957 list_del(&rwi->list);
1962 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1966 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1968 struct ibmvnic_rwi *rwi;
1970 rwi = get_next_rwi(adapter);
1973 rwi = get_next_rwi(adapter);
1977 static void __ibmvnic_reset(struct work_struct *work)
1979 struct ibmvnic_rwi *rwi;
1980 struct ibmvnic_adapter *adapter;
1981 struct net_device *netdev;
1982 bool we_lock_rtnl = false;
1986 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1987 netdev = adapter->netdev;
1989 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1990 * unless wait_for_reset is set, in which case the rtnl lock
1991 * has already been taken before initializing the reset
1993 if (!adapter->wait_for_reset) {
1995 we_lock_rtnl = true;
1997 reset_state = adapter->state;
1999 rwi = get_next_rwi(adapter);
2001 if (adapter->state == VNIC_REMOVING ||
2002 adapter->state == VNIC_REMOVED)
2008 if (adapter->force_reset_recovery) {
2009 adapter->force_reset_recovery = false;
2010 rc = do_hard_reset(adapter, rwi, reset_state);
2012 rc = do_reset(adapter, rwi, reset_state);
2015 if (rc && rc != IBMVNIC_INIT_FAILED &&
2016 !adapter->force_reset_recovery)
2019 rwi = get_next_rwi(adapter);
2022 if (adapter->wait_for_reset) {
2023 adapter->wait_for_reset = false;
2024 adapter->reset_done_rc = rc;
2025 complete(&adapter->reset_done);
2029 netdev_dbg(adapter->netdev, "Reset failed\n");
2030 free_all_rwi(adapter);
2033 adapter->resetting = false;
2038 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2039 enum ibmvnic_reset_reason reason)
2041 struct list_head *entry, *tmp_entry;
2042 struct ibmvnic_rwi *rwi, *tmp;
2043 struct net_device *netdev = adapter->netdev;
2044 unsigned long flags;
2047 if (adapter->state == VNIC_REMOVING ||
2048 adapter->state == VNIC_REMOVED ||
2049 adapter->failover_pending) {
2051 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2055 if (adapter->state == VNIC_PROBING) {
2056 netdev_warn(netdev, "Adapter reset during probe\n");
2057 ret = adapter->init_done_rc = EAGAIN;
2061 spin_lock_irqsave(&adapter->rwi_lock, flags);
2063 list_for_each(entry, &adapter->rwi_list) {
2064 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2065 if (tmp->reset_reason == reason) {
2066 netdev_dbg(netdev, "Skipping matching reset\n");
2067 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2073 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2075 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2076 ibmvnic_close(netdev);
2080 /* if we just received a transport event,
2081 * flush reset queue and process this reset
2083 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2084 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2087 rwi->reset_reason = reason;
2088 list_add_tail(&rwi->list, &adapter->rwi_list);
2089 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2090 adapter->resetting = true;
2091 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2092 schedule_work(&adapter->ibmvnic_reset);
2096 if (adapter->wait_for_reset)
2097 adapter->wait_for_reset = false;
2101 static void ibmvnic_tx_timeout(struct net_device *dev)
2103 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2105 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2108 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2109 struct ibmvnic_rx_buff *rx_buff)
2111 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2113 rx_buff->skb = NULL;
2115 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2116 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2118 atomic_dec(&pool->available);
2121 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2123 struct net_device *netdev = napi->dev;
2124 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2125 int scrq_num = (int)(napi - adapter->napi);
2126 int frames_processed = 0;
2129 while (frames_processed < budget) {
2130 struct sk_buff *skb;
2131 struct ibmvnic_rx_buff *rx_buff;
2132 union sub_crq *next;
2137 if (unlikely(adapter->resetting &&
2138 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2139 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2140 napi_complete_done(napi, frames_processed);
2141 return frames_processed;
2144 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2146 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2148 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2149 rx_comp.correlator);
2150 /* do error checking */
2151 if (next->rx_comp.rc) {
2152 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2153 be16_to_cpu(next->rx_comp.rc));
2154 /* free the entry */
2155 next->rx_comp.first = 0;
2156 dev_kfree_skb_any(rx_buff->skb);
2157 remove_buff_from_pool(adapter, rx_buff);
2159 } else if (!rx_buff->skb) {
2160 /* free the entry */
2161 next->rx_comp.first = 0;
2162 remove_buff_from_pool(adapter, rx_buff);
2166 length = be32_to_cpu(next->rx_comp.len);
2167 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2168 flags = next->rx_comp.flags;
2170 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2173 /* VLAN Header has been stripped by the system firmware and
2174 * needs to be inserted by the driver
2176 if (adapter->rx_vlan_header_insertion &&
2177 (flags & IBMVNIC_VLAN_STRIPPED))
2178 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2179 ntohs(next->rx_comp.vlan_tci));
2181 /* free the entry */
2182 next->rx_comp.first = 0;
2183 remove_buff_from_pool(adapter, rx_buff);
2185 skb_put(skb, length);
2186 skb->protocol = eth_type_trans(skb, netdev);
2187 skb_record_rx_queue(skb, scrq_num);
2189 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2190 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2191 skb->ip_summed = CHECKSUM_UNNECESSARY;
2195 napi_gro_receive(napi, skb); /* send it up */
2196 netdev->stats.rx_packets++;
2197 netdev->stats.rx_bytes += length;
2198 adapter->rx_stats_buffers[scrq_num].packets++;
2199 adapter->rx_stats_buffers[scrq_num].bytes += length;
2203 if (adapter->state != VNIC_CLOSING)
2204 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2206 if (frames_processed < budget) {
2207 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2208 napi_complete_done(napi, frames_processed);
2209 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2210 napi_reschedule(napi)) {
2211 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2215 return frames_processed;
2218 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2222 adapter->fallback.mtu = adapter->req_mtu;
2223 adapter->fallback.rx_queues = adapter->req_rx_queues;
2224 adapter->fallback.tx_queues = adapter->req_tx_queues;
2225 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2226 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2228 init_completion(&adapter->reset_done);
2229 adapter->wait_for_reset = true;
2230 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2233 wait_for_completion(&adapter->reset_done);
2236 if (adapter->reset_done_rc) {
2238 adapter->desired.mtu = adapter->fallback.mtu;
2239 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2240 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2241 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2242 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2244 init_completion(&adapter->reset_done);
2245 adapter->wait_for_reset = true;
2246 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2249 wait_for_completion(&adapter->reset_done);
2251 adapter->wait_for_reset = false;
2256 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2258 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2260 adapter->desired.mtu = new_mtu + ETH_HLEN;
2262 return wait_for_reset(adapter);
2265 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2266 struct net_device *dev,
2267 netdev_features_t features)
2269 /* Some backing hardware adapters can not
2270 * handle packets with a MSS less than 224
2271 * or with only one segment.
2273 if (skb_is_gso(skb)) {
2274 if (skb_shinfo(skb)->gso_size < 224 ||
2275 skb_shinfo(skb)->gso_segs == 1)
2276 features &= ~NETIF_F_GSO_MASK;
2282 static const struct net_device_ops ibmvnic_netdev_ops = {
2283 .ndo_open = ibmvnic_open,
2284 .ndo_stop = ibmvnic_close,
2285 .ndo_start_xmit = ibmvnic_xmit,
2286 .ndo_set_rx_mode = ibmvnic_set_multi,
2287 .ndo_set_mac_address = ibmvnic_set_mac,
2288 .ndo_validate_addr = eth_validate_addr,
2289 .ndo_tx_timeout = ibmvnic_tx_timeout,
2290 .ndo_change_mtu = ibmvnic_change_mtu,
2291 .ndo_features_check = ibmvnic_features_check,
2294 /* ethtool functions */
2296 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2297 struct ethtool_link_ksettings *cmd)
2299 u32 supported, advertising;
2301 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2303 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2305 cmd->base.speed = SPEED_1000;
2306 cmd->base.duplex = DUPLEX_FULL;
2307 cmd->base.port = PORT_FIBRE;
2308 cmd->base.phy_address = 0;
2309 cmd->base.autoneg = AUTONEG_ENABLE;
2311 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2313 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2319 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2320 struct ethtool_drvinfo *info)
2322 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2324 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2325 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2326 strlcpy(info->fw_version, adapter->fw_version,
2327 sizeof(info->fw_version));
2330 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2332 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2334 return adapter->msg_enable;
2337 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2339 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2341 adapter->msg_enable = data;
2344 static u32 ibmvnic_get_link(struct net_device *netdev)
2346 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2348 /* Don't need to send a query because we request a logical link up at
2349 * init and then we wait for link state indications
2351 return adapter->logical_link_state;
2354 static void ibmvnic_get_ringparam(struct net_device *netdev,
2355 struct ethtool_ringparam *ring)
2357 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2359 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2360 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2361 ring->rx_mini_max_pending = 0;
2362 ring->rx_jumbo_max_pending = 0;
2363 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2364 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2365 ring->rx_mini_pending = 0;
2366 ring->rx_jumbo_pending = 0;
2369 static int ibmvnic_set_ringparam(struct net_device *netdev,
2370 struct ethtool_ringparam *ring)
2372 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2374 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2375 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2376 netdev_err(netdev, "Invalid request.\n");
2377 netdev_err(netdev, "Max tx buffers = %llu\n",
2378 adapter->max_rx_add_entries_per_subcrq);
2379 netdev_err(netdev, "Max rx buffers = %llu\n",
2380 adapter->max_tx_entries_per_subcrq);
2384 adapter->desired.rx_entries = ring->rx_pending;
2385 adapter->desired.tx_entries = ring->tx_pending;
2387 return wait_for_reset(adapter);
2390 static void ibmvnic_get_channels(struct net_device *netdev,
2391 struct ethtool_channels *channels)
2393 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2395 channels->max_rx = adapter->max_rx_queues;
2396 channels->max_tx = adapter->max_tx_queues;
2397 channels->max_other = 0;
2398 channels->max_combined = 0;
2399 channels->rx_count = adapter->req_rx_queues;
2400 channels->tx_count = adapter->req_tx_queues;
2401 channels->other_count = 0;
2402 channels->combined_count = 0;
2405 static int ibmvnic_set_channels(struct net_device *netdev,
2406 struct ethtool_channels *channels)
2408 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2410 adapter->desired.rx_queues = channels->rx_count;
2411 adapter->desired.tx_queues = channels->tx_count;
2413 return wait_for_reset(adapter);
2416 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2418 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2421 if (stringset != ETH_SS_STATS)
2424 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2425 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2427 for (i = 0; i < adapter->req_tx_queues; i++) {
2428 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2429 data += ETH_GSTRING_LEN;
2431 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2432 data += ETH_GSTRING_LEN;
2434 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2435 data += ETH_GSTRING_LEN;
2438 for (i = 0; i < adapter->req_rx_queues; i++) {
2439 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2440 data += ETH_GSTRING_LEN;
2442 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2443 data += ETH_GSTRING_LEN;
2445 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2446 data += ETH_GSTRING_LEN;
2450 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2452 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2456 return ARRAY_SIZE(ibmvnic_stats) +
2457 adapter->req_tx_queues * NUM_TX_STATS +
2458 adapter->req_rx_queues * NUM_RX_STATS;
2464 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2465 struct ethtool_stats *stats, u64 *data)
2467 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2468 union ibmvnic_crq crq;
2472 memset(&crq, 0, sizeof(crq));
2473 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2474 crq.request_statistics.cmd = REQUEST_STATISTICS;
2475 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2476 crq.request_statistics.len =
2477 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2479 /* Wait for data to be written */
2480 init_completion(&adapter->stats_done);
2481 rc = ibmvnic_send_crq(adapter, &crq);
2484 wait_for_completion(&adapter->stats_done);
2486 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2487 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2488 ibmvnic_stats[i].offset));
2490 for (j = 0; j < adapter->req_tx_queues; j++) {
2491 data[i] = adapter->tx_stats_buffers[j].packets;
2493 data[i] = adapter->tx_stats_buffers[j].bytes;
2495 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2499 for (j = 0; j < adapter->req_rx_queues; j++) {
2500 data[i] = adapter->rx_stats_buffers[j].packets;
2502 data[i] = adapter->rx_stats_buffers[j].bytes;
2504 data[i] = adapter->rx_stats_buffers[j].interrupts;
2509 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2510 .get_drvinfo = ibmvnic_get_drvinfo,
2511 .get_msglevel = ibmvnic_get_msglevel,
2512 .set_msglevel = ibmvnic_set_msglevel,
2513 .get_link = ibmvnic_get_link,
2514 .get_ringparam = ibmvnic_get_ringparam,
2515 .set_ringparam = ibmvnic_set_ringparam,
2516 .get_channels = ibmvnic_get_channels,
2517 .set_channels = ibmvnic_set_channels,
2518 .get_strings = ibmvnic_get_strings,
2519 .get_sset_count = ibmvnic_get_sset_count,
2520 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2521 .get_link_ksettings = ibmvnic_get_link_ksettings,
2524 /* Routines for managing CRQs/sCRQs */
2526 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2527 struct ibmvnic_sub_crq_queue *scrq)
2532 free_irq(scrq->irq, scrq);
2533 irq_dispose_mapping(scrq->irq);
2537 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2538 atomic_set(&scrq->used, 0);
2541 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2542 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2546 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2550 for (i = 0; i < adapter->req_tx_queues; i++) {
2551 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2552 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2557 for (i = 0; i < adapter->req_rx_queues; i++) {
2558 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2559 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2567 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2568 struct ibmvnic_sub_crq_queue *scrq,
2571 struct device *dev = &adapter->vdev->dev;
2574 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2577 /* Close the sub-crqs */
2579 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2580 adapter->vdev->unit_address,
2582 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2585 netdev_err(adapter->netdev,
2586 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2591 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2593 free_pages((unsigned long)scrq->msgs, 2);
2597 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2600 struct device *dev = &adapter->vdev->dev;
2601 struct ibmvnic_sub_crq_queue *scrq;
2604 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2609 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2611 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2612 goto zero_page_failed;
2615 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2617 if (dma_mapping_error(dev, scrq->msg_token)) {
2618 dev_warn(dev, "Couldn't map crq queue messages page\n");
2622 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2623 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2625 if (rc == H_RESOURCE)
2626 rc = ibmvnic_reset_crq(adapter);
2628 if (rc == H_CLOSED) {
2629 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2631 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2635 scrq->adapter = adapter;
2636 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2637 spin_lock_init(&scrq->lock);
2639 netdev_dbg(adapter->netdev,
2640 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2641 scrq->crq_num, scrq->hw_irq, scrq->irq);
2646 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2649 free_pages((unsigned long)scrq->msgs, 2);
2656 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2660 if (adapter->tx_scrq) {
2661 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2662 if (!adapter->tx_scrq[i])
2665 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2667 if (adapter->tx_scrq[i]->irq) {
2668 free_irq(adapter->tx_scrq[i]->irq,
2669 adapter->tx_scrq[i]);
2670 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2671 adapter->tx_scrq[i]->irq = 0;
2674 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2678 kfree(adapter->tx_scrq);
2679 adapter->tx_scrq = NULL;
2680 adapter->num_active_tx_scrqs = 0;
2683 if (adapter->rx_scrq) {
2684 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2685 if (!adapter->rx_scrq[i])
2688 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2690 if (adapter->rx_scrq[i]->irq) {
2691 free_irq(adapter->rx_scrq[i]->irq,
2692 adapter->rx_scrq[i]);
2693 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2694 adapter->rx_scrq[i]->irq = 0;
2697 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2701 kfree(adapter->rx_scrq);
2702 adapter->rx_scrq = NULL;
2703 adapter->num_active_rx_scrqs = 0;
2707 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2708 struct ibmvnic_sub_crq_queue *scrq)
2710 struct device *dev = &adapter->vdev->dev;
2713 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2714 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2716 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2721 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2722 struct ibmvnic_sub_crq_queue *scrq)
2724 struct device *dev = &adapter->vdev->dev;
2727 if (scrq->hw_irq > 0x100000000ULL) {
2728 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2732 if (adapter->resetting &&
2733 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2734 u64 val = (0xff000000) | scrq->hw_irq;
2736 rc = plpar_hcall_norets(H_EOI, val);
2738 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2742 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2743 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2745 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2750 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2751 struct ibmvnic_sub_crq_queue *scrq)
2753 struct device *dev = &adapter->vdev->dev;
2754 struct ibmvnic_tx_pool *tx_pool;
2755 struct ibmvnic_tx_buff *txbuff;
2756 union sub_crq *next;
2761 while (pending_scrq(adapter, scrq)) {
2762 unsigned int pool = scrq->pool_index;
2763 int num_entries = 0;
2765 next = ibmvnic_next_scrq(adapter, scrq);
2766 for (i = 0; i < next->tx_comp.num_comps; i++) {
2767 if (next->tx_comp.rcs[i]) {
2768 dev_err(dev, "tx error %x\n",
2769 next->tx_comp.rcs[i]);
2772 index = be32_to_cpu(next->tx_comp.correlators[i]);
2773 if (index & IBMVNIC_TSO_POOL_MASK) {
2774 tx_pool = &adapter->tso_pool[pool];
2775 index &= ~IBMVNIC_TSO_POOL_MASK;
2777 tx_pool = &adapter->tx_pool[pool];
2780 txbuff = &tx_pool->tx_buff[index];
2782 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2783 if (!txbuff->data_dma[j])
2786 txbuff->data_dma[j] = 0;
2789 if (txbuff->last_frag) {
2790 dev_kfree_skb_any(txbuff->skb);
2794 num_entries += txbuff->num_entries;
2796 tx_pool->free_map[tx_pool->producer_index] = index;
2797 tx_pool->producer_index =
2798 (tx_pool->producer_index + 1) %
2799 tx_pool->num_buffers;
2801 /* remove tx_comp scrq*/
2802 next->tx_comp.first = 0;
2804 if (atomic_sub_return(num_entries, &scrq->used) <=
2805 (adapter->req_tx_entries_per_subcrq / 2) &&
2806 __netif_subqueue_stopped(adapter->netdev,
2807 scrq->pool_index)) {
2808 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2809 netdev_dbg(adapter->netdev, "Started queue %d\n",
2814 enable_scrq_irq(adapter, scrq);
2816 if (pending_scrq(adapter, scrq)) {
2817 disable_scrq_irq(adapter, scrq);
2824 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2826 struct ibmvnic_sub_crq_queue *scrq = instance;
2827 struct ibmvnic_adapter *adapter = scrq->adapter;
2829 disable_scrq_irq(adapter, scrq);
2830 ibmvnic_complete_tx(adapter, scrq);
2835 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2837 struct ibmvnic_sub_crq_queue *scrq = instance;
2838 struct ibmvnic_adapter *adapter = scrq->adapter;
2840 /* When booting a kdump kernel we can hit pending interrupts
2841 * prior to completing driver initialization.
2843 if (unlikely(adapter->state != VNIC_OPEN))
2846 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2848 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2849 disable_scrq_irq(adapter, scrq);
2850 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2856 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2858 struct device *dev = &adapter->vdev->dev;
2859 struct ibmvnic_sub_crq_queue *scrq;
2863 for (i = 0; i < adapter->req_tx_queues; i++) {
2864 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2866 scrq = adapter->tx_scrq[i];
2867 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2871 dev_err(dev, "Error mapping irq\n");
2872 goto req_tx_irq_failed;
2875 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2876 0, "ibmvnic_tx", scrq);
2879 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2881 irq_dispose_mapping(scrq->irq);
2882 goto req_tx_irq_failed;
2886 for (i = 0; i < adapter->req_rx_queues; i++) {
2887 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2889 scrq = adapter->rx_scrq[i];
2890 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2893 dev_err(dev, "Error mapping irq\n");
2894 goto req_rx_irq_failed;
2896 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2897 0, "ibmvnic_rx", scrq);
2899 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2901 irq_dispose_mapping(scrq->irq);
2902 goto req_rx_irq_failed;
2908 for (j = 0; j < i; j++) {
2909 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2910 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2912 i = adapter->req_tx_queues;
2914 for (j = 0; j < i; j++) {
2915 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2916 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2918 release_sub_crqs(adapter, 1);
2922 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2924 struct device *dev = &adapter->vdev->dev;
2925 struct ibmvnic_sub_crq_queue **allqueues;
2926 int registered_queues = 0;
2931 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2933 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2937 for (i = 0; i < total_queues; i++) {
2938 allqueues[i] = init_sub_crq_queue(adapter);
2939 if (!allqueues[i]) {
2940 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2943 registered_queues++;
2946 /* Make sure we were able to register the minimum number of queues */
2947 if (registered_queues <
2948 adapter->min_tx_queues + adapter->min_rx_queues) {
2949 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2953 /* Distribute the failed allocated queues*/
2954 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2955 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2958 if (adapter->req_rx_queues > adapter->min_rx_queues)
2959 adapter->req_rx_queues--;
2964 if (adapter->req_tx_queues > adapter->min_tx_queues)
2965 adapter->req_tx_queues--;
2972 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2973 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2974 if (!adapter->tx_scrq)
2977 for (i = 0; i < adapter->req_tx_queues; i++) {
2978 adapter->tx_scrq[i] = allqueues[i];
2979 adapter->tx_scrq[i]->pool_index = i;
2980 adapter->num_active_tx_scrqs++;
2983 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2984 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2985 if (!adapter->rx_scrq)
2988 for (i = 0; i < adapter->req_rx_queues; i++) {
2989 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2990 adapter->rx_scrq[i]->scrq_num = i;
2991 adapter->num_active_rx_scrqs++;
2998 kfree(adapter->tx_scrq);
2999 adapter->tx_scrq = NULL;
3001 for (i = 0; i < registered_queues; i++)
3002 release_sub_crq_queue(adapter, allqueues[i], 1);
3007 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3009 struct device *dev = &adapter->vdev->dev;
3010 union ibmvnic_crq crq;
3014 /* Sub-CRQ entries are 32 byte long */
3015 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3017 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3018 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3019 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3023 if (adapter->desired.mtu)
3024 adapter->req_mtu = adapter->desired.mtu;
3026 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3028 if (!adapter->desired.tx_entries)
3029 adapter->desired.tx_entries =
3030 adapter->max_tx_entries_per_subcrq;
3031 if (!adapter->desired.rx_entries)
3032 adapter->desired.rx_entries =
3033 adapter->max_rx_add_entries_per_subcrq;
3035 max_entries = IBMVNIC_MAX_LTB_SIZE /
3036 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3038 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3039 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3040 adapter->desired.tx_entries = max_entries;
3043 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3044 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3045 adapter->desired.rx_entries = max_entries;
3048 if (adapter->desired.tx_entries)
3049 adapter->req_tx_entries_per_subcrq =
3050 adapter->desired.tx_entries;
3052 adapter->req_tx_entries_per_subcrq =
3053 adapter->max_tx_entries_per_subcrq;
3055 if (adapter->desired.rx_entries)
3056 adapter->req_rx_add_entries_per_subcrq =
3057 adapter->desired.rx_entries;
3059 adapter->req_rx_add_entries_per_subcrq =
3060 adapter->max_rx_add_entries_per_subcrq;
3062 if (adapter->desired.tx_queues)
3063 adapter->req_tx_queues =
3064 adapter->desired.tx_queues;
3066 adapter->req_tx_queues =
3067 adapter->opt_tx_comp_sub_queues;
3069 if (adapter->desired.rx_queues)
3070 adapter->req_rx_queues =
3071 adapter->desired.rx_queues;
3073 adapter->req_rx_queues =
3074 adapter->opt_rx_comp_queues;
3076 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3079 memset(&crq, 0, sizeof(crq));
3080 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3081 crq.request_capability.cmd = REQUEST_CAPABILITY;
3083 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3084 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3085 atomic_inc(&adapter->running_cap_crqs);
3086 ibmvnic_send_crq(adapter, &crq);
3088 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3089 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3090 atomic_inc(&adapter->running_cap_crqs);
3091 ibmvnic_send_crq(adapter, &crq);
3093 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3094 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3095 atomic_inc(&adapter->running_cap_crqs);
3096 ibmvnic_send_crq(adapter, &crq);
3098 crq.request_capability.capability =
3099 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3100 crq.request_capability.number =
3101 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3102 atomic_inc(&adapter->running_cap_crqs);
3103 ibmvnic_send_crq(adapter, &crq);
3105 crq.request_capability.capability =
3106 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3107 crq.request_capability.number =
3108 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3109 atomic_inc(&adapter->running_cap_crqs);
3110 ibmvnic_send_crq(adapter, &crq);
3112 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3113 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3114 atomic_inc(&adapter->running_cap_crqs);
3115 ibmvnic_send_crq(adapter, &crq);
3117 if (adapter->netdev->flags & IFF_PROMISC) {
3118 if (adapter->promisc_supported) {
3119 crq.request_capability.capability =
3120 cpu_to_be16(PROMISC_REQUESTED);
3121 crq.request_capability.number = cpu_to_be64(1);
3122 atomic_inc(&adapter->running_cap_crqs);
3123 ibmvnic_send_crq(adapter, &crq);
3126 crq.request_capability.capability =
3127 cpu_to_be16(PROMISC_REQUESTED);
3128 crq.request_capability.number = cpu_to_be64(0);
3129 atomic_inc(&adapter->running_cap_crqs);
3130 ibmvnic_send_crq(adapter, &crq);
3134 static int pending_scrq(struct ibmvnic_adapter *adapter,
3135 struct ibmvnic_sub_crq_queue *scrq)
3137 union sub_crq *entry = &scrq->msgs[scrq->cur];
3139 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3145 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3146 struct ibmvnic_sub_crq_queue *scrq)
3148 union sub_crq *entry;
3149 unsigned long flags;
3151 spin_lock_irqsave(&scrq->lock, flags);
3152 entry = &scrq->msgs[scrq->cur];
3153 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3154 if (++scrq->cur == scrq->size)
3159 spin_unlock_irqrestore(&scrq->lock, flags);
3164 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3166 struct ibmvnic_crq_queue *queue = &adapter->crq;
3167 union ibmvnic_crq *crq;
3169 crq = &queue->msgs[queue->cur];
3170 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3171 if (++queue->cur == queue->size)
3180 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3184 dev_warn_ratelimited(dev,
3185 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3189 dev_warn_ratelimited(dev,
3190 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3194 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3199 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3200 union sub_crq *sub_crq)
3202 unsigned int ua = adapter->vdev->unit_address;
3203 struct device *dev = &adapter->vdev->dev;
3204 u64 *u64_crq = (u64 *)sub_crq;
3207 netdev_dbg(adapter->netdev,
3208 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3209 (unsigned long int)cpu_to_be64(remote_handle),
3210 (unsigned long int)cpu_to_be64(u64_crq[0]),
3211 (unsigned long int)cpu_to_be64(u64_crq[1]),
3212 (unsigned long int)cpu_to_be64(u64_crq[2]),
3213 (unsigned long int)cpu_to_be64(u64_crq[3]));
3215 /* Make sure the hypervisor sees the complete request */
3218 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3219 cpu_to_be64(remote_handle),
3220 cpu_to_be64(u64_crq[0]),
3221 cpu_to_be64(u64_crq[1]),
3222 cpu_to_be64(u64_crq[2]),
3223 cpu_to_be64(u64_crq[3]));
3226 print_subcrq_error(dev, rc, __func__);
3231 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3232 u64 remote_handle, u64 ioba, u64 num_entries)
3234 unsigned int ua = adapter->vdev->unit_address;
3235 struct device *dev = &adapter->vdev->dev;
3238 /* Make sure the hypervisor sees the complete request */
3240 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3241 cpu_to_be64(remote_handle),
3245 print_subcrq_error(dev, rc, __func__);
3250 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3251 union ibmvnic_crq *crq)
3253 unsigned int ua = adapter->vdev->unit_address;
3254 struct device *dev = &adapter->vdev->dev;
3255 u64 *u64_crq = (u64 *)crq;
3258 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3259 (unsigned long int)cpu_to_be64(u64_crq[0]),
3260 (unsigned long int)cpu_to_be64(u64_crq[1]));
3262 if (!adapter->crq.active &&
3263 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3264 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3268 /* Make sure the hypervisor sees the complete request */
3271 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3272 cpu_to_be64(u64_crq[0]),
3273 cpu_to_be64(u64_crq[1]));
3276 if (rc == H_CLOSED) {
3277 dev_warn(dev, "CRQ Queue closed\n");
3278 if (adapter->resetting)
3279 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3282 dev_warn(dev, "Send error (rc=%d)\n", rc);
3288 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3290 union ibmvnic_crq crq;
3292 memset(&crq, 0, sizeof(crq));
3293 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3294 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3295 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3297 return ibmvnic_send_crq(adapter, &crq);
3300 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3302 union ibmvnic_crq crq;
3304 memset(&crq, 0, sizeof(crq));
3305 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3306 crq.version_exchange.cmd = VERSION_EXCHANGE;
3307 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3309 return ibmvnic_send_crq(adapter, &crq);
3312 struct vnic_login_client_data {
3318 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3322 /* Calculate the amount of buffer space needed for the
3323 * vnic client data in the login buffer. There are four entries,
3324 * OS name, LPAR name, device name, and a null last entry.
3326 len = 4 * sizeof(struct vnic_login_client_data);
3327 len += 6; /* "Linux" plus NULL */
3328 len += strlen(utsname()->nodename) + 1;
3329 len += strlen(adapter->netdev->name) + 1;
3334 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3335 struct vnic_login_client_data *vlcd)
3337 const char *os_name = "Linux";
3340 /* Type 1 - LPAR OS */
3342 len = strlen(os_name) + 1;
3343 vlcd->len = cpu_to_be16(len);
3344 strncpy(vlcd->name, os_name, len);
3345 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3347 /* Type 2 - LPAR name */
3349 len = strlen(utsname()->nodename) + 1;
3350 vlcd->len = cpu_to_be16(len);
3351 strncpy(vlcd->name, utsname()->nodename, len);
3352 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3354 /* Type 3 - device name */
3356 len = strlen(adapter->netdev->name) + 1;
3357 vlcd->len = cpu_to_be16(len);
3358 strncpy(vlcd->name, adapter->netdev->name, len);
3361 static int send_login(struct ibmvnic_adapter *adapter)
3363 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3364 struct ibmvnic_login_buffer *login_buffer;
3365 struct device *dev = &adapter->vdev->dev;
3366 dma_addr_t rsp_buffer_token;
3367 dma_addr_t buffer_token;
3368 size_t rsp_buffer_size;
3369 union ibmvnic_crq crq;
3373 int client_data_len;
3374 struct vnic_login_client_data *vlcd;
3377 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3378 netdev_err(adapter->netdev,
3379 "RX or TX queues are not allocated, device login failed\n");
3383 release_login_rsp_buffer(adapter);
3384 client_data_len = vnic_client_data_len(adapter);
3387 sizeof(struct ibmvnic_login_buffer) +
3388 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3391 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3393 goto buf_alloc_failed;
3395 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3397 if (dma_mapping_error(dev, buffer_token)) {
3398 dev_err(dev, "Couldn't map login buffer\n");
3399 goto buf_map_failed;
3402 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3403 sizeof(u64) * adapter->req_tx_queues +
3404 sizeof(u64) * adapter->req_rx_queues +
3405 sizeof(u64) * adapter->req_rx_queues +
3406 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3408 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3409 if (!login_rsp_buffer)
3410 goto buf_rsp_alloc_failed;
3412 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3413 rsp_buffer_size, DMA_FROM_DEVICE);
3414 if (dma_mapping_error(dev, rsp_buffer_token)) {
3415 dev_err(dev, "Couldn't map login rsp buffer\n");
3416 goto buf_rsp_map_failed;
3419 adapter->login_buf = login_buffer;
3420 adapter->login_buf_token = buffer_token;
3421 adapter->login_buf_sz = buffer_size;
3422 adapter->login_rsp_buf = login_rsp_buffer;
3423 adapter->login_rsp_buf_token = rsp_buffer_token;
3424 adapter->login_rsp_buf_sz = rsp_buffer_size;
3426 login_buffer->len = cpu_to_be32(buffer_size);
3427 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3428 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3429 login_buffer->off_txcomp_subcrqs =
3430 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3431 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3432 login_buffer->off_rxcomp_subcrqs =
3433 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3434 sizeof(u64) * adapter->req_tx_queues);
3435 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3436 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3438 tx_list_p = (__be64 *)((char *)login_buffer +
3439 sizeof(struct ibmvnic_login_buffer));
3440 rx_list_p = (__be64 *)((char *)login_buffer +
3441 sizeof(struct ibmvnic_login_buffer) +
3442 sizeof(u64) * adapter->req_tx_queues);
3444 for (i = 0; i < adapter->req_tx_queues; i++) {
3445 if (adapter->tx_scrq[i]) {
3446 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3451 for (i = 0; i < adapter->req_rx_queues; i++) {
3452 if (adapter->rx_scrq[i]) {
3453 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3458 /* Insert vNIC login client data */
3459 vlcd = (struct vnic_login_client_data *)
3460 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3461 login_buffer->client_data_offset =
3462 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3463 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3465 vnic_add_client_data(adapter, vlcd);
3467 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3468 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3469 netdev_dbg(adapter->netdev, "%016lx\n",
3470 ((unsigned long int *)(adapter->login_buf))[i]);
3473 memset(&crq, 0, sizeof(crq));
3474 crq.login.first = IBMVNIC_CRQ_CMD;
3475 crq.login.cmd = LOGIN;
3476 crq.login.ioba = cpu_to_be32(buffer_token);
3477 crq.login.len = cpu_to_be32(buffer_size);
3478 ibmvnic_send_crq(adapter, &crq);
3483 kfree(login_rsp_buffer);
3484 buf_rsp_alloc_failed:
3485 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3487 kfree(login_buffer);
3492 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3495 union ibmvnic_crq crq;
3497 memset(&crq, 0, sizeof(crq));
3498 crq.request_map.first = IBMVNIC_CRQ_CMD;
3499 crq.request_map.cmd = REQUEST_MAP;
3500 crq.request_map.map_id = map_id;
3501 crq.request_map.ioba = cpu_to_be32(addr);
3502 crq.request_map.len = cpu_to_be32(len);
3503 return ibmvnic_send_crq(adapter, &crq);
3506 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3508 union ibmvnic_crq crq;
3510 memset(&crq, 0, sizeof(crq));
3511 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3512 crq.request_unmap.cmd = REQUEST_UNMAP;
3513 crq.request_unmap.map_id = map_id;
3514 return ibmvnic_send_crq(adapter, &crq);
3517 static void send_map_query(struct ibmvnic_adapter *adapter)
3519 union ibmvnic_crq crq;
3521 memset(&crq, 0, sizeof(crq));
3522 crq.query_map.first = IBMVNIC_CRQ_CMD;
3523 crq.query_map.cmd = QUERY_MAP;
3524 ibmvnic_send_crq(adapter, &crq);
3527 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3528 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3530 union ibmvnic_crq crq;
3532 atomic_set(&adapter->running_cap_crqs, 0);
3533 memset(&crq, 0, sizeof(crq));
3534 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3535 crq.query_capability.cmd = QUERY_CAPABILITY;
3537 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3538 atomic_inc(&adapter->running_cap_crqs);
3539 ibmvnic_send_crq(adapter, &crq);
3541 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3542 atomic_inc(&adapter->running_cap_crqs);
3543 ibmvnic_send_crq(adapter, &crq);
3545 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3546 atomic_inc(&adapter->running_cap_crqs);
3547 ibmvnic_send_crq(adapter, &crq);
3549 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3550 atomic_inc(&adapter->running_cap_crqs);
3551 ibmvnic_send_crq(adapter, &crq);
3553 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3554 atomic_inc(&adapter->running_cap_crqs);
3555 ibmvnic_send_crq(adapter, &crq);
3557 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3558 atomic_inc(&adapter->running_cap_crqs);
3559 ibmvnic_send_crq(adapter, &crq);
3561 crq.query_capability.capability =
3562 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3563 atomic_inc(&adapter->running_cap_crqs);
3564 ibmvnic_send_crq(adapter, &crq);
3566 crq.query_capability.capability =
3567 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3568 atomic_inc(&adapter->running_cap_crqs);
3569 ibmvnic_send_crq(adapter, &crq);
3571 crq.query_capability.capability =
3572 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3573 atomic_inc(&adapter->running_cap_crqs);
3574 ibmvnic_send_crq(adapter, &crq);
3576 crq.query_capability.capability =
3577 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3578 atomic_inc(&adapter->running_cap_crqs);
3579 ibmvnic_send_crq(adapter, &crq);
3581 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3582 atomic_inc(&adapter->running_cap_crqs);
3583 ibmvnic_send_crq(adapter, &crq);
3585 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3586 atomic_inc(&adapter->running_cap_crqs);
3587 ibmvnic_send_crq(adapter, &crq);
3589 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3590 atomic_inc(&adapter->running_cap_crqs);
3591 ibmvnic_send_crq(adapter, &crq);
3593 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3594 atomic_inc(&adapter->running_cap_crqs);
3595 ibmvnic_send_crq(adapter, &crq);
3597 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3598 atomic_inc(&adapter->running_cap_crqs);
3599 ibmvnic_send_crq(adapter, &crq);
3601 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3602 atomic_inc(&adapter->running_cap_crqs);
3603 ibmvnic_send_crq(adapter, &crq);
3605 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3606 atomic_inc(&adapter->running_cap_crqs);
3607 ibmvnic_send_crq(adapter, &crq);
3609 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3610 atomic_inc(&adapter->running_cap_crqs);
3611 ibmvnic_send_crq(adapter, &crq);
3613 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3614 atomic_inc(&adapter->running_cap_crqs);
3615 ibmvnic_send_crq(adapter, &crq);
3617 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3618 atomic_inc(&adapter->running_cap_crqs);
3619 ibmvnic_send_crq(adapter, &crq);
3621 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3622 atomic_inc(&adapter->running_cap_crqs);
3623 ibmvnic_send_crq(adapter, &crq);
3625 crq.query_capability.capability =
3626 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3627 atomic_inc(&adapter->running_cap_crqs);
3628 ibmvnic_send_crq(adapter, &crq);
3630 crq.query_capability.capability =
3631 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3632 atomic_inc(&adapter->running_cap_crqs);
3633 ibmvnic_send_crq(adapter, &crq);
3635 crq.query_capability.capability =
3636 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3637 atomic_inc(&adapter->running_cap_crqs);
3638 ibmvnic_send_crq(adapter, &crq);
3640 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3641 atomic_inc(&adapter->running_cap_crqs);
3642 ibmvnic_send_crq(adapter, &crq);
3645 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3646 struct ibmvnic_adapter *adapter)
3648 struct device *dev = &adapter->vdev->dev;
3650 if (crq->get_vpd_size_rsp.rc.code) {
3651 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3652 crq->get_vpd_size_rsp.rc.code);
3653 complete(&adapter->fw_done);
3657 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3658 complete(&adapter->fw_done);
3661 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3662 struct ibmvnic_adapter *adapter)
3664 struct device *dev = &adapter->vdev->dev;
3665 unsigned char *substr = NULL;
3666 u8 fw_level_len = 0;
3668 memset(adapter->fw_version, 0, 32);
3670 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3673 if (crq->get_vpd_rsp.rc.code) {
3674 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3675 crq->get_vpd_rsp.rc.code);
3679 /* get the position of the firmware version info
3680 * located after the ASCII 'RM' substring in the buffer
3682 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3684 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3688 /* get length of firmware level ASCII substring */
3689 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3690 fw_level_len = *(substr + 2);
3692 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3696 /* copy firmware version string from vpd into adapter */
3697 if ((substr + 3 + fw_level_len) <
3698 (adapter->vpd->buff + adapter->vpd->len)) {
3699 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3701 dev_info(dev, "FW substr extrapolated VPD buff\n");
3705 if (adapter->fw_version[0] == '\0')
3706 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3707 complete(&adapter->fw_done);
3710 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3712 struct device *dev = &adapter->vdev->dev;
3713 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3714 union ibmvnic_crq crq;
3717 dma_unmap_single(dev, adapter->ip_offload_tok,
3718 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3720 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3721 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3722 netdev_dbg(adapter->netdev, "%016lx\n",
3723 ((unsigned long int *)(buf))[i]);
3725 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3726 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3727 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3728 buf->tcp_ipv4_chksum);
3729 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3730 buf->tcp_ipv6_chksum);
3731 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3732 buf->udp_ipv4_chksum);
3733 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3734 buf->udp_ipv6_chksum);
3735 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3736 buf->large_tx_ipv4);
3737 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3738 buf->large_tx_ipv6);
3739 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3740 buf->large_rx_ipv4);
3741 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3742 buf->large_rx_ipv6);
3743 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3744 buf->max_ipv4_header_size);
3745 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3746 buf->max_ipv6_header_size);
3747 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3748 buf->max_tcp_header_size);
3749 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3750 buf->max_udp_header_size);
3751 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3752 buf->max_large_tx_size);
3753 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3754 buf->max_large_rx_size);
3755 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3756 buf->ipv6_extension_header);
3757 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3758 buf->tcp_pseudosum_req);
3759 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3760 buf->num_ipv6_ext_headers);
3761 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3762 buf->off_ipv6_ext_headers);
3764 adapter->ip_offload_ctrl_tok =
3765 dma_map_single(dev, &adapter->ip_offload_ctrl,
3766 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3768 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3769 dev_err(dev, "Couldn't map ip offload control buffer\n");
3773 adapter->ip_offload_ctrl.len =
3774 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3775 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3776 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3777 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3778 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3779 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3780 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3781 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3782 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3783 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3785 /* large_rx disabled for now, additional features needed */
3786 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3787 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3789 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3791 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3792 adapter->netdev->features |= NETIF_F_IP_CSUM;
3794 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3795 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3797 if ((adapter->netdev->features &
3798 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3799 adapter->netdev->features |= NETIF_F_RXCSUM;
3801 if (buf->large_tx_ipv4)
3802 adapter->netdev->features |= NETIF_F_TSO;
3803 if (buf->large_tx_ipv6)
3804 adapter->netdev->features |= NETIF_F_TSO6;
3806 adapter->netdev->hw_features |= adapter->netdev->features;
3808 memset(&crq, 0, sizeof(crq));
3809 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3810 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3811 crq.control_ip_offload.len =
3812 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3813 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3814 ibmvnic_send_crq(adapter, &crq);
3817 static const char *ibmvnic_fw_err_cause(u16 cause)
3820 case ADAPTER_PROBLEM:
3821 return "adapter problem";
3823 return "bus problem";
3825 return "firmware problem";
3827 return "device driver problem";
3829 return "EEH recovery";
3831 return "firmware updated";
3833 return "low Memory";
3839 static void handle_error_indication(union ibmvnic_crq *crq,
3840 struct ibmvnic_adapter *adapter)
3842 struct device *dev = &adapter->vdev->dev;
3845 cause = be16_to_cpu(crq->error_indication.error_cause);
3847 dev_warn_ratelimited(dev,
3848 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3849 crq->error_indication.flags
3850 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3851 ibmvnic_fw_err_cause(cause));
3853 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3854 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3856 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3859 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3860 struct ibmvnic_adapter *adapter)
3862 struct net_device *netdev = adapter->netdev;
3863 struct device *dev = &adapter->vdev->dev;
3866 rc = crq->change_mac_addr_rsp.rc.code;
3868 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3871 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3874 complete(&adapter->fw_done);
3878 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3879 struct ibmvnic_adapter *adapter)
3881 struct device *dev = &adapter->vdev->dev;
3885 atomic_dec(&adapter->running_cap_crqs);
3886 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3888 req_value = &adapter->req_tx_queues;
3892 req_value = &adapter->req_rx_queues;
3895 case REQ_RX_ADD_QUEUES:
3896 req_value = &adapter->req_rx_add_queues;
3899 case REQ_TX_ENTRIES_PER_SUBCRQ:
3900 req_value = &adapter->req_tx_entries_per_subcrq;
3901 name = "tx_entries_per_subcrq";
3903 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3904 req_value = &adapter->req_rx_add_entries_per_subcrq;
3905 name = "rx_add_entries_per_subcrq";
3908 req_value = &adapter->req_mtu;
3911 case PROMISC_REQUESTED:
3912 req_value = &adapter->promisc;
3916 dev_err(dev, "Got invalid cap request rsp %d\n",
3917 crq->request_capability.capability);
3921 switch (crq->request_capability_rsp.rc.code) {
3924 case PARTIALSUCCESS:
3925 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3927 (long int)be64_to_cpu(crq->request_capability_rsp.
3930 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3932 pr_err("mtu of %llu is not supported. Reverting.\n",
3934 *req_value = adapter->fallback.mtu;
3937 be64_to_cpu(crq->request_capability_rsp.number);
3940 ibmvnic_send_req_caps(adapter, 1);
3943 dev_err(dev, "Error %d in request cap rsp\n",
3944 crq->request_capability_rsp.rc.code);
3948 /* Done receiving requested capabilities, query IP offload support */
3949 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3950 union ibmvnic_crq newcrq;
3951 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3952 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3953 &adapter->ip_offload_buf;
3955 adapter->wait_capability = false;
3956 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3960 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3961 if (!firmware_has_feature(FW_FEATURE_CMO))
3962 dev_err(dev, "Couldn't map offload buffer\n");
3966 memset(&newcrq, 0, sizeof(newcrq));
3967 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3968 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3969 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3970 newcrq.query_ip_offload.ioba =
3971 cpu_to_be32(adapter->ip_offload_tok);
3973 ibmvnic_send_crq(adapter, &newcrq);
3977 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3978 struct ibmvnic_adapter *adapter)
3980 struct device *dev = &adapter->vdev->dev;
3981 struct net_device *netdev = adapter->netdev;
3982 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3983 struct ibmvnic_login_buffer *login = adapter->login_buf;
3986 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3988 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3989 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
3991 /* If the number of queues requested can't be allocated by the
3992 * server, the login response will return with code 1. We will need
3993 * to resend the login buffer with fewer queues requested.
3995 if (login_rsp_crq->generic.rc.code) {
3996 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
3997 complete(&adapter->init_done);
4001 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4003 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4004 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4005 netdev_dbg(adapter->netdev, "%016lx\n",
4006 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4010 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4011 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4012 adapter->req_rx_add_queues !=
4013 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4014 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4015 ibmvnic_remove(adapter->vdev);
4018 release_login_buffer(adapter);
4019 complete(&adapter->init_done);
4024 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4025 struct ibmvnic_adapter *adapter)
4027 struct device *dev = &adapter->vdev->dev;
4030 rc = crq->request_unmap_rsp.rc.code;
4032 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4035 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4036 struct ibmvnic_adapter *adapter)
4038 struct net_device *netdev = adapter->netdev;
4039 struct device *dev = &adapter->vdev->dev;
4042 rc = crq->query_map_rsp.rc.code;
4044 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4047 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4048 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4049 crq->query_map_rsp.free_pages);
4052 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4053 struct ibmvnic_adapter *adapter)
4055 struct net_device *netdev = adapter->netdev;
4056 struct device *dev = &adapter->vdev->dev;
4059 atomic_dec(&adapter->running_cap_crqs);
4060 netdev_dbg(netdev, "Outstanding queries: %d\n",
4061 atomic_read(&adapter->running_cap_crqs));
4062 rc = crq->query_capability.rc.code;
4064 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4068 switch (be16_to_cpu(crq->query_capability.capability)) {
4070 adapter->min_tx_queues =
4071 be64_to_cpu(crq->query_capability.number);
4072 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4073 adapter->min_tx_queues);
4076 adapter->min_rx_queues =
4077 be64_to_cpu(crq->query_capability.number);
4078 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4079 adapter->min_rx_queues);
4081 case MIN_RX_ADD_QUEUES:
4082 adapter->min_rx_add_queues =
4083 be64_to_cpu(crq->query_capability.number);
4084 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4085 adapter->min_rx_add_queues);
4088 adapter->max_tx_queues =
4089 be64_to_cpu(crq->query_capability.number);
4090 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4091 adapter->max_tx_queues);
4094 adapter->max_rx_queues =
4095 be64_to_cpu(crq->query_capability.number);
4096 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4097 adapter->max_rx_queues);
4099 case MAX_RX_ADD_QUEUES:
4100 adapter->max_rx_add_queues =
4101 be64_to_cpu(crq->query_capability.number);
4102 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4103 adapter->max_rx_add_queues);
4105 case MIN_TX_ENTRIES_PER_SUBCRQ:
4106 adapter->min_tx_entries_per_subcrq =
4107 be64_to_cpu(crq->query_capability.number);
4108 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4109 adapter->min_tx_entries_per_subcrq);
4111 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4112 adapter->min_rx_add_entries_per_subcrq =
4113 be64_to_cpu(crq->query_capability.number);
4114 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4115 adapter->min_rx_add_entries_per_subcrq);
4117 case MAX_TX_ENTRIES_PER_SUBCRQ:
4118 adapter->max_tx_entries_per_subcrq =
4119 be64_to_cpu(crq->query_capability.number);
4120 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4121 adapter->max_tx_entries_per_subcrq);
4123 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4124 adapter->max_rx_add_entries_per_subcrq =
4125 be64_to_cpu(crq->query_capability.number);
4126 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4127 adapter->max_rx_add_entries_per_subcrq);
4129 case TCP_IP_OFFLOAD:
4130 adapter->tcp_ip_offload =
4131 be64_to_cpu(crq->query_capability.number);
4132 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4133 adapter->tcp_ip_offload);
4135 case PROMISC_SUPPORTED:
4136 adapter->promisc_supported =
4137 be64_to_cpu(crq->query_capability.number);
4138 netdev_dbg(netdev, "promisc_supported = %lld\n",
4139 adapter->promisc_supported);
4142 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4143 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4144 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4147 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4148 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4149 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4151 case MAX_MULTICAST_FILTERS:
4152 adapter->max_multicast_filters =
4153 be64_to_cpu(crq->query_capability.number);
4154 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4155 adapter->max_multicast_filters);
4157 case VLAN_HEADER_INSERTION:
4158 adapter->vlan_header_insertion =
4159 be64_to_cpu(crq->query_capability.number);
4160 if (adapter->vlan_header_insertion)
4161 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4162 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4163 adapter->vlan_header_insertion);
4165 case RX_VLAN_HEADER_INSERTION:
4166 adapter->rx_vlan_header_insertion =
4167 be64_to_cpu(crq->query_capability.number);
4168 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4169 adapter->rx_vlan_header_insertion);
4171 case MAX_TX_SG_ENTRIES:
4172 adapter->max_tx_sg_entries =
4173 be64_to_cpu(crq->query_capability.number);
4174 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4175 adapter->max_tx_sg_entries);
4177 case RX_SG_SUPPORTED:
4178 adapter->rx_sg_supported =
4179 be64_to_cpu(crq->query_capability.number);
4180 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4181 adapter->rx_sg_supported);
4183 case OPT_TX_COMP_SUB_QUEUES:
4184 adapter->opt_tx_comp_sub_queues =
4185 be64_to_cpu(crq->query_capability.number);
4186 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4187 adapter->opt_tx_comp_sub_queues);
4189 case OPT_RX_COMP_QUEUES:
4190 adapter->opt_rx_comp_queues =
4191 be64_to_cpu(crq->query_capability.number);
4192 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4193 adapter->opt_rx_comp_queues);
4195 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4196 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4197 be64_to_cpu(crq->query_capability.number);
4198 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4199 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4201 case OPT_TX_ENTRIES_PER_SUBCRQ:
4202 adapter->opt_tx_entries_per_subcrq =
4203 be64_to_cpu(crq->query_capability.number);
4204 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4205 adapter->opt_tx_entries_per_subcrq);
4207 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4208 adapter->opt_rxba_entries_per_subcrq =
4209 be64_to_cpu(crq->query_capability.number);
4210 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4211 adapter->opt_rxba_entries_per_subcrq);
4213 case TX_RX_DESC_REQ:
4214 adapter->tx_rx_desc_req = crq->query_capability.number;
4215 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4216 adapter->tx_rx_desc_req);
4220 netdev_err(netdev, "Got invalid cap rsp %d\n",
4221 crq->query_capability.capability);
4225 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4226 adapter->wait_capability = false;
4227 ibmvnic_send_req_caps(adapter, 0);
4231 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4232 struct ibmvnic_adapter *adapter)
4234 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4235 struct net_device *netdev = adapter->netdev;
4236 struct device *dev = &adapter->vdev->dev;
4237 u64 *u64_crq = (u64 *)crq;
4240 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4241 (unsigned long int)cpu_to_be64(u64_crq[0]),
4242 (unsigned long int)cpu_to_be64(u64_crq[1]));
4243 switch (gen_crq->first) {
4244 case IBMVNIC_CRQ_INIT_RSP:
4245 switch (gen_crq->cmd) {
4246 case IBMVNIC_CRQ_INIT:
4247 dev_info(dev, "Partner initialized\n");
4248 adapter->from_passive_init = true;
4249 adapter->failover_pending = false;
4250 if (!completion_done(&adapter->init_done)) {
4251 complete(&adapter->init_done);
4252 adapter->init_done_rc = -EIO;
4254 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4256 case IBMVNIC_CRQ_INIT_COMPLETE:
4257 dev_info(dev, "Partner initialization complete\n");
4258 adapter->crq.active = true;
4259 send_version_xchg(adapter);
4262 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4265 case IBMVNIC_CRQ_XPORT_EVENT:
4266 netif_carrier_off(netdev);
4267 adapter->crq.active = false;
4268 if (adapter->resetting)
4269 adapter->force_reset_recovery = true;
4270 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4271 dev_info(dev, "Migrated, re-enabling adapter\n");
4272 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4273 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4274 dev_info(dev, "Backing device failover detected\n");
4275 adapter->failover_pending = true;
4277 /* The adapter lost the connection */
4278 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4280 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4283 case IBMVNIC_CRQ_CMD_RSP:
4286 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4291 switch (gen_crq->cmd) {
4292 case VERSION_EXCHANGE_RSP:
4293 rc = crq->version_exchange_rsp.rc.code;
4295 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4298 dev_info(dev, "Partner protocol version is %d\n",
4299 crq->version_exchange_rsp.version);
4300 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4303 be16_to_cpu(crq->version_exchange_rsp.version);
4304 send_cap_queries(adapter);
4306 case QUERY_CAPABILITY_RSP:
4307 handle_query_cap_rsp(crq, adapter);
4310 handle_query_map_rsp(crq, adapter);
4312 case REQUEST_MAP_RSP:
4313 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4314 complete(&adapter->fw_done);
4316 case REQUEST_UNMAP_RSP:
4317 handle_request_unmap_rsp(crq, adapter);
4319 case REQUEST_CAPABILITY_RSP:
4320 handle_request_cap_rsp(crq, adapter);
4323 netdev_dbg(netdev, "Got Login Response\n");
4324 handle_login_rsp(crq, adapter);
4326 case LOGICAL_LINK_STATE_RSP:
4328 "Got Logical Link State Response, state: %d rc: %d\n",
4329 crq->logical_link_state_rsp.link_state,
4330 crq->logical_link_state_rsp.rc.code);
4331 adapter->logical_link_state =
4332 crq->logical_link_state_rsp.link_state;
4333 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4334 complete(&adapter->init_done);
4336 case LINK_STATE_INDICATION:
4337 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4338 adapter->phys_link_state =
4339 crq->link_state_indication.phys_link_state;
4340 adapter->logical_link_state =
4341 crq->link_state_indication.logical_link_state;
4343 case CHANGE_MAC_ADDR_RSP:
4344 netdev_dbg(netdev, "Got MAC address change Response\n");
4345 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4347 case ERROR_INDICATION:
4348 netdev_dbg(netdev, "Got Error Indication\n");
4349 handle_error_indication(crq, adapter);
4351 case REQUEST_STATISTICS_RSP:
4352 netdev_dbg(netdev, "Got Statistics Response\n");
4353 complete(&adapter->stats_done);
4355 case QUERY_IP_OFFLOAD_RSP:
4356 netdev_dbg(netdev, "Got Query IP offload Response\n");
4357 handle_query_ip_offload_rsp(adapter);
4359 case MULTICAST_CTRL_RSP:
4360 netdev_dbg(netdev, "Got multicast control Response\n");
4362 case CONTROL_IP_OFFLOAD_RSP:
4363 netdev_dbg(netdev, "Got Control IP offload Response\n");
4364 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4365 sizeof(adapter->ip_offload_ctrl),
4367 complete(&adapter->init_done);
4369 case COLLECT_FW_TRACE_RSP:
4370 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4371 complete(&adapter->fw_done);
4373 case GET_VPD_SIZE_RSP:
4374 handle_vpd_size_rsp(crq, adapter);
4377 handle_vpd_rsp(crq, adapter);
4380 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4385 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4387 struct ibmvnic_adapter *adapter = instance;
4389 tasklet_schedule(&adapter->tasklet);
4393 static void ibmvnic_tasklet(void *data)
4395 struct ibmvnic_adapter *adapter = data;
4396 struct ibmvnic_crq_queue *queue = &adapter->crq;
4397 union ibmvnic_crq *crq;
4398 unsigned long flags;
4401 spin_lock_irqsave(&queue->lock, flags);
4403 /* Pull all the valid messages off the CRQ */
4404 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4405 ibmvnic_handle_crq(crq, adapter);
4406 crq->generic.first = 0;
4409 /* remain in tasklet until all
4410 * capabilities responses are received
4412 if (!adapter->wait_capability)
4415 /* if capabilities CRQ's were sent in this tasklet, the following
4416 * tasklet must wait until all responses are received
4418 if (atomic_read(&adapter->running_cap_crqs) != 0)
4419 adapter->wait_capability = true;
4420 spin_unlock_irqrestore(&queue->lock, flags);
4423 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4425 struct vio_dev *vdev = adapter->vdev;
4429 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4430 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4433 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4438 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4440 struct ibmvnic_crq_queue *crq = &adapter->crq;
4441 struct device *dev = &adapter->vdev->dev;
4442 struct vio_dev *vdev = adapter->vdev;
4447 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4448 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4450 /* Clean out the queue */
4451 memset(crq->msgs, 0, PAGE_SIZE);
4453 crq->active = false;
4455 /* And re-open it again */
4456 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4457 crq->msg_token, PAGE_SIZE);
4460 /* Adapter is good, but other end is not ready */
4461 dev_warn(dev, "Partner adapter not ready\n");
4463 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4468 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4470 struct ibmvnic_crq_queue *crq = &adapter->crq;
4471 struct vio_dev *vdev = adapter->vdev;
4477 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4478 free_irq(vdev->irq, adapter);
4479 tasklet_kill(&adapter->tasklet);
4481 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4482 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4484 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4486 free_page((unsigned long)crq->msgs);
4488 crq->active = false;
4491 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4493 struct ibmvnic_crq_queue *crq = &adapter->crq;
4494 struct device *dev = &adapter->vdev->dev;
4495 struct vio_dev *vdev = adapter->vdev;
4496 int rc, retrc = -ENOMEM;
4501 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4502 /* Should we allocate more than one page? */
4507 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4508 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4510 if (dma_mapping_error(dev, crq->msg_token))
4513 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4514 crq->msg_token, PAGE_SIZE);
4516 if (rc == H_RESOURCE)
4517 /* maybe kexecing and resource is busy. try a reset */
4518 rc = ibmvnic_reset_crq(adapter);
4521 if (rc == H_CLOSED) {
4522 dev_warn(dev, "Partner adapter not ready\n");
4524 dev_warn(dev, "Error %d opening adapter\n", rc);
4525 goto reg_crq_failed;
4530 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4531 (unsigned long)adapter);
4533 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4534 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4537 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4539 goto req_irq_failed;
4542 rc = vio_enable_interrupts(vdev);
4544 dev_err(dev, "Error %d enabling interrupts\n", rc);
4545 goto req_irq_failed;
4549 spin_lock_init(&crq->lock);
4554 tasklet_kill(&adapter->tasklet);
4556 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4557 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4559 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4561 free_page((unsigned long)crq->msgs);
4566 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4568 struct device *dev = &adapter->vdev->dev;
4569 unsigned long timeout = msecs_to_jiffies(30000);
4570 u64 old_num_rx_queues, old_num_tx_queues;
4573 adapter->from_passive_init = false;
4575 old_num_rx_queues = adapter->req_rx_queues;
4576 old_num_tx_queues = adapter->req_tx_queues;
4578 reinit_completion(&adapter->init_done);
4579 adapter->init_done_rc = 0;
4580 ibmvnic_send_crq_init(adapter);
4581 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4582 dev_err(dev, "Initialization sequence timed out\n");
4586 if (adapter->init_done_rc) {
4587 release_crq_queue(adapter);
4588 return adapter->init_done_rc;
4591 if (adapter->from_passive_init) {
4592 adapter->state = VNIC_OPEN;
4593 adapter->from_passive_init = false;
4597 if (adapter->resetting && !adapter->wait_for_reset &&
4598 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4599 if (adapter->req_rx_queues != old_num_rx_queues ||
4600 adapter->req_tx_queues != old_num_tx_queues) {
4601 release_sub_crqs(adapter, 0);
4602 rc = init_sub_crqs(adapter);
4604 rc = reset_sub_crq_queues(adapter);
4607 rc = init_sub_crqs(adapter);
4611 dev_err(dev, "Initialization of sub crqs failed\n");
4612 release_crq_queue(adapter);
4616 rc = init_sub_crq_irqs(adapter);
4618 dev_err(dev, "Failed to initialize sub crq irqs\n");
4619 release_crq_queue(adapter);
4625 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4627 struct device *dev = &adapter->vdev->dev;
4628 unsigned long timeout = msecs_to_jiffies(30000);
4631 adapter->from_passive_init = false;
4633 adapter->init_done_rc = 0;
4634 ibmvnic_send_crq_init(adapter);
4635 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4636 dev_err(dev, "Initialization sequence timed out\n");
4640 if (adapter->init_done_rc) {
4641 release_crq_queue(adapter);
4642 return adapter->init_done_rc;
4645 if (adapter->from_passive_init) {
4646 adapter->state = VNIC_OPEN;
4647 adapter->from_passive_init = false;
4651 rc = init_sub_crqs(adapter);
4653 dev_err(dev, "Initialization of sub crqs failed\n");
4654 release_crq_queue(adapter);
4658 rc = init_sub_crq_irqs(adapter);
4660 dev_err(dev, "Failed to initialize sub crq irqs\n");
4661 release_crq_queue(adapter);
4667 static struct device_attribute dev_attr_failover;
4669 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4671 struct ibmvnic_adapter *adapter;
4672 struct net_device *netdev;
4673 unsigned char *mac_addr_p;
4676 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4679 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4680 VETH_MAC_ADDR, NULL);
4683 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4684 __FILE__, __LINE__);
4688 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4689 IBMVNIC_MAX_QUEUES);
4693 adapter = netdev_priv(netdev);
4694 adapter->state = VNIC_PROBING;
4695 dev_set_drvdata(&dev->dev, netdev);
4696 adapter->vdev = dev;
4697 adapter->netdev = netdev;
4699 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4700 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4701 netdev->irq = dev->irq;
4702 netdev->netdev_ops = &ibmvnic_netdev_ops;
4703 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4704 SET_NETDEV_DEV(netdev, &dev->dev);
4706 spin_lock_init(&adapter->stats_lock);
4708 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4709 INIT_LIST_HEAD(&adapter->rwi_list);
4710 spin_lock_init(&adapter->rwi_lock);
4711 init_completion(&adapter->init_done);
4712 adapter->resetting = false;
4714 adapter->mac_change_pending = false;
4717 rc = init_crq_queue(adapter);
4719 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4721 goto ibmvnic_init_fail;
4724 rc = ibmvnic_init(adapter);
4725 if (rc && rc != EAGAIN)
4726 goto ibmvnic_init_fail;
4727 } while (rc == EAGAIN);
4729 rc = init_stats_buffers(adapter);
4731 goto ibmvnic_init_fail;
4733 rc = init_stats_token(adapter);
4735 goto ibmvnic_stats_fail;
4737 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4738 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4739 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4741 rc = device_create_file(&dev->dev, &dev_attr_failover);
4743 goto ibmvnic_dev_file_err;
4745 netif_carrier_off(netdev);
4746 rc = register_netdev(netdev);
4748 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4749 goto ibmvnic_register_fail;
4751 dev_info(&dev->dev, "ibmvnic registered\n");
4753 adapter->state = VNIC_PROBED;
4755 adapter->wait_for_reset = false;
4759 ibmvnic_register_fail:
4760 device_remove_file(&dev->dev, &dev_attr_failover);
4762 ibmvnic_dev_file_err:
4763 release_stats_token(adapter);
4766 release_stats_buffers(adapter);
4769 release_sub_crqs(adapter, 1);
4770 release_crq_queue(adapter);
4771 free_netdev(netdev);
4776 static int ibmvnic_remove(struct vio_dev *dev)
4778 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4779 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4781 adapter->state = VNIC_REMOVING;
4783 unregister_netdevice(netdev);
4785 release_resources(adapter);
4786 release_sub_crqs(adapter, 1);
4787 release_crq_queue(adapter);
4789 release_stats_token(adapter);
4790 release_stats_buffers(adapter);
4792 adapter->state = VNIC_REMOVED;
4795 device_remove_file(&dev->dev, &dev_attr_failover);
4796 free_netdev(netdev);
4797 dev_set_drvdata(&dev->dev, NULL);
4802 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4803 const char *buf, size_t count)
4805 struct net_device *netdev = dev_get_drvdata(dev);
4806 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4807 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4808 __be64 session_token;
4811 if (!sysfs_streq(buf, "1"))
4814 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4815 H_GET_SESSION_TOKEN, 0, 0, 0);
4817 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4822 session_token = (__be64)retbuf[0];
4823 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4824 be64_to_cpu(session_token));
4825 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4826 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4828 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4836 static DEVICE_ATTR_WO(failover);
4838 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4840 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4841 struct ibmvnic_adapter *adapter;
4842 struct iommu_table *tbl;
4843 unsigned long ret = 0;
4846 tbl = get_iommu_table_base(&vdev->dev);
4848 /* netdev inits at probe time along with the structures we need below*/
4850 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4852 adapter = netdev_priv(netdev);
4854 ret += PAGE_SIZE; /* the crq message queue */
4855 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4857 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4858 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4860 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4862 ret += adapter->rx_pool[i].size *
4863 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4868 static int ibmvnic_resume(struct device *dev)
4870 struct net_device *netdev = dev_get_drvdata(dev);
4871 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4873 if (adapter->state != VNIC_OPEN)
4876 tasklet_schedule(&adapter->tasklet);
4881 static const struct vio_device_id ibmvnic_device_table[] = {
4882 {"network", "IBM,vnic"},
4885 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4887 static const struct dev_pm_ops ibmvnic_pm_ops = {
4888 .resume = ibmvnic_resume
4891 static struct vio_driver ibmvnic_driver = {
4892 .id_table = ibmvnic_device_table,
4893 .probe = ibmvnic_probe,
4894 .remove = ibmvnic_remove,
4895 .get_desired_dma = ibmvnic_get_desired_dma,
4896 .name = ibmvnic_driver_name,
4897 .pm = &ibmvnic_pm_ops,
4900 /* module functions */
4901 static int __init ibmvnic_module_init(void)
4903 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4904 IBMVNIC_DRIVER_VERSION);
4906 return vio_register_driver(&ibmvnic_driver);
4909 static void __exit ibmvnic_module_exit(void)
4911 vio_unregister_driver(&ibmvnic_driver);
4914 module_init(ibmvnic_module_init);
4915 module_exit(ibmvnic_module_exit);