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 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
445 rc = reset_long_term_buff(adapter,
446 &rx_pool->long_term_buff);
452 for (j = 0; j < rx_pool->size; j++)
453 rx_pool->free_map[j] = j;
455 memset(rx_pool->rx_buff, 0,
456 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
458 atomic_set(&rx_pool->available, 0);
459 rx_pool->next_alloc = 0;
460 rx_pool->next_free = 0;
467 static void release_rx_pools(struct ibmvnic_adapter *adapter)
469 struct ibmvnic_rx_pool *rx_pool;
472 if (!adapter->rx_pool)
475 for (i = 0; i < adapter->num_active_rx_pools; i++) {
476 rx_pool = &adapter->rx_pool[i];
478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
480 kfree(rx_pool->free_map);
481 free_long_term_buff(adapter, &rx_pool->long_term_buff);
483 if (!rx_pool->rx_buff)
486 for (j = 0; j < rx_pool->size; j++) {
487 if (rx_pool->rx_buff[j].skb) {
488 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
489 rx_pool->rx_buff[j].skb = NULL;
493 kfree(rx_pool->rx_buff);
496 kfree(adapter->rx_pool);
497 adapter->rx_pool = NULL;
498 adapter->num_active_rx_pools = 0;
501 static int init_rx_pools(struct net_device *netdev)
503 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
504 struct device *dev = &adapter->vdev->dev;
505 struct ibmvnic_rx_pool *rx_pool;
511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
515 adapter->rx_pool = kcalloc(rxadd_subcrqs,
516 sizeof(struct ibmvnic_rx_pool),
518 if (!adapter->rx_pool) {
519 dev_err(dev, "Failed to allocate rx pools\n");
523 adapter->num_active_rx_pools = rxadd_subcrqs;
525 for (i = 0; i < rxadd_subcrqs; i++) {
526 rx_pool = &adapter->rx_pool[i];
528 netdev_dbg(adapter->netdev,
529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
530 i, adapter->req_rx_add_entries_per_subcrq,
531 be64_to_cpu(size_array[i]));
533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
535 rx_pool->buff_size = be64_to_cpu(size_array[i]);
538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
540 if (!rx_pool->free_map) {
541 release_rx_pools(adapter);
545 rx_pool->rx_buff = kcalloc(rx_pool->size,
546 sizeof(struct ibmvnic_rx_buff),
548 if (!rx_pool->rx_buff) {
549 dev_err(dev, "Couldn't alloc rx buffers\n");
550 release_rx_pools(adapter);
554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
555 rx_pool->size * rx_pool->buff_size)) {
556 release_rx_pools(adapter);
560 for (j = 0; j < rx_pool->size; ++j)
561 rx_pool->free_map[j] = j;
563 atomic_set(&rx_pool->available, 0);
564 rx_pool->next_alloc = 0;
565 rx_pool->next_free = 0;
571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
572 struct ibmvnic_tx_pool *tx_pool)
576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
580 memset(tx_pool->tx_buff, 0,
581 tx_pool->num_buffers *
582 sizeof(struct ibmvnic_tx_buff));
584 for (i = 0; i < tx_pool->num_buffers; i++)
585 tx_pool->free_map[i] = i;
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
593 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
599 for (i = 0; i < tx_scrqs; i++) {
600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
611 static void release_vpd_data(struct ibmvnic_adapter *adapter)
616 kfree(adapter->vpd->buff);
622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
623 struct ibmvnic_tx_pool *tx_pool)
625 kfree(tx_pool->tx_buff);
626 kfree(tx_pool->free_map);
627 free_long_term_buff(adapter, &tx_pool->long_term_buff);
630 static void release_tx_pools(struct ibmvnic_adapter *adapter)
634 if (!adapter->tx_pool)
637 for (i = 0; i < adapter->num_active_tx_pools; i++) {
638 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
639 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
642 kfree(adapter->tx_pool);
643 adapter->tx_pool = NULL;
644 kfree(adapter->tso_pool);
645 adapter->tso_pool = NULL;
646 adapter->num_active_tx_pools = 0;
649 static int init_one_tx_pool(struct net_device *netdev,
650 struct ibmvnic_tx_pool *tx_pool,
651 int num_entries, int buf_size)
653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
656 tx_pool->tx_buff = kcalloc(num_entries,
657 sizeof(struct ibmvnic_tx_buff),
659 if (!tx_pool->tx_buff)
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 num_entries * buf_size))
666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
667 if (!tx_pool->free_map)
670 for (i = 0; i < num_entries; i++)
671 tx_pool->free_map[i] = i;
673 tx_pool->consumer_index = 0;
674 tx_pool->producer_index = 0;
675 tx_pool->num_buffers = num_entries;
676 tx_pool->buf_size = buf_size;
681 static int init_tx_pools(struct net_device *netdev)
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
688 adapter->tx_pool = kcalloc(tx_subcrqs,
689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
690 if (!adapter->tx_pool)
693 adapter->tso_pool = kcalloc(tx_subcrqs,
694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
695 if (!adapter->tso_pool)
698 adapter->num_active_tx_pools = tx_subcrqs;
700 for (i = 0; i < tx_subcrqs; i++) {
701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
702 adapter->req_tx_entries_per_subcrq,
703 adapter->req_mtu + VLAN_HLEN);
705 release_tx_pools(adapter);
709 init_one_tx_pool(netdev, &adapter->tso_pool[i],
713 release_tx_pools(adapter);
721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
725 if (adapter->napi_enabled)
728 for (i = 0; i < adapter->req_rx_queues; i++)
729 napi_enable(&adapter->napi[i]);
731 adapter->napi_enabled = true;
734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
738 if (!adapter->napi_enabled)
741 for (i = 0; i < adapter->req_rx_queues; i++) {
742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
743 napi_disable(&adapter->napi[i]);
746 adapter->napi_enabled = false;
749 static int init_napi(struct ibmvnic_adapter *adapter)
753 adapter->napi = kcalloc(adapter->req_rx_queues,
754 sizeof(struct napi_struct), GFP_KERNEL);
758 for (i = 0; i < adapter->req_rx_queues; i++) {
759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
760 netif_napi_add(adapter->netdev, &adapter->napi[i],
761 ibmvnic_poll, NAPI_POLL_WEIGHT);
764 adapter->num_active_rx_napi = adapter->req_rx_queues;
768 static void release_napi(struct ibmvnic_adapter *adapter)
775 for (i = 0; i < adapter->num_active_rx_napi; i++) {
776 if (&adapter->napi[i]) {
777 netdev_dbg(adapter->netdev,
778 "Releasing napi[%d]\n", i);
779 netif_napi_del(&adapter->napi[i]);
783 kfree(adapter->napi);
784 adapter->napi = NULL;
785 adapter->num_active_rx_napi = 0;
786 adapter->napi_enabled = false;
789 static int ibmvnic_login(struct net_device *netdev)
791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
792 unsigned long timeout = msecs_to_jiffies(30000);
799 if (retry_count > IBMVNIC_MAX_QUEUES) {
800 netdev_warn(netdev, "Login attempts exceeded\n");
804 adapter->init_done_rc = 0;
805 reinit_completion(&adapter->init_done);
806 rc = send_login(adapter);
808 netdev_warn(netdev, "Unable to login\n");
812 if (!wait_for_completion_timeout(&adapter->init_done,
814 netdev_warn(netdev, "Login timed out\n");
818 if (adapter->init_done_rc == PARTIALSUCCESS) {
820 release_sub_crqs(adapter, 1);
824 "Received partial success, retrying...\n");
825 adapter->init_done_rc = 0;
826 reinit_completion(&adapter->init_done);
827 send_cap_queries(adapter);
828 if (!wait_for_completion_timeout(&adapter->init_done,
831 "Capabilities query timed out\n");
835 rc = init_sub_crqs(adapter);
838 "SCRQ initialization failed\n");
842 rc = init_sub_crq_irqs(adapter);
845 "SCRQ irq initialization failed\n");
848 } else if (adapter->init_done_rc) {
849 netdev_warn(netdev, "Adapter login failed\n");
854 /* handle pending MAC address changes after successful login */
855 if (adapter->mac_change_pending) {
856 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
857 adapter->mac_change_pending = false;
863 static void release_login_buffer(struct ibmvnic_adapter *adapter)
865 kfree(adapter->login_buf);
866 adapter->login_buf = NULL;
869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
871 kfree(adapter->login_rsp_buf);
872 adapter->login_rsp_buf = NULL;
875 static void release_resources(struct ibmvnic_adapter *adapter)
877 release_vpd_data(adapter);
879 release_tx_pools(adapter);
880 release_rx_pools(adapter);
882 release_napi(adapter);
883 release_login_rsp_buffer(adapter);
886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
888 struct net_device *netdev = adapter->netdev;
889 unsigned long timeout = msecs_to_jiffies(30000);
890 union ibmvnic_crq crq;
894 netdev_dbg(netdev, "setting link state %d\n", link_state);
896 memset(&crq, 0, sizeof(crq));
897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
899 crq.logical_link_state.link_state = link_state;
904 reinit_completion(&adapter->init_done);
905 rc = ibmvnic_send_crq(adapter, &crq);
907 netdev_err(netdev, "Failed to set link state\n");
911 if (!wait_for_completion_timeout(&adapter->init_done,
913 netdev_err(netdev, "timeout setting link state\n");
917 if (adapter->init_done_rc == 1) {
918 /* Partuial success, delay and re-send */
921 } else if (adapter->init_done_rc) {
922 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
923 adapter->init_done_rc);
924 return adapter->init_done_rc;
931 static int set_real_num_queues(struct net_device *netdev)
933 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
937 adapter->req_tx_queues, adapter->req_rx_queues);
939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
941 netdev_err(netdev, "failed to set the number of tx queues\n");
945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
947 netdev_err(netdev, "failed to set the number of rx queues\n");
952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
954 struct device *dev = &adapter->vdev->dev;
955 union ibmvnic_crq crq;
959 if (adapter->vpd->buff)
960 len = adapter->vpd->len;
962 init_completion(&adapter->fw_done);
963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
964 crq.get_vpd_size.cmd = GET_VPD_SIZE;
965 rc = ibmvnic_send_crq(adapter, &crq);
968 wait_for_completion(&adapter->fw_done);
970 if (!adapter->vpd->len)
973 if (!adapter->vpd->buff)
974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
975 else if (adapter->vpd->len != len)
977 krealloc(adapter->vpd->buff,
978 adapter->vpd->len, GFP_KERNEL);
980 if (!adapter->vpd->buff) {
981 dev_err(dev, "Could allocate VPD buffer\n");
985 adapter->vpd->dma_addr =
986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
989 dev_err(dev, "Could not map VPD buffer\n");
990 kfree(adapter->vpd->buff);
991 adapter->vpd->buff = NULL;
995 reinit_completion(&adapter->fw_done);
996 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
997 crq.get_vpd.cmd = GET_VPD;
998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1000 rc = ibmvnic_send_crq(adapter, &crq);
1002 kfree(adapter->vpd->buff);
1003 adapter->vpd->buff = NULL;
1006 wait_for_completion(&adapter->fw_done);
1011 static int init_resources(struct ibmvnic_adapter *adapter)
1013 struct net_device *netdev = adapter->netdev;
1016 rc = set_real_num_queues(netdev);
1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1024 /* Vital Product Data (VPD) */
1025 rc = ibmvnic_get_vpd(adapter);
1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1031 adapter->map_id = 1;
1033 rc = init_napi(adapter);
1037 send_map_query(adapter);
1039 rc = init_rx_pools(netdev);
1043 rc = init_tx_pools(netdev);
1047 static int __ibmvnic_open(struct net_device *netdev)
1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1050 enum vnic_state prev_state = adapter->state;
1053 adapter->state = VNIC_OPENING;
1054 replenish_pools(adapter);
1055 ibmvnic_napi_enable(adapter);
1057 /* We're ready to receive frames, enable the sub-crq interrupts and
1058 * set the logical link state to up
1060 for (i = 0; i < adapter->req_rx_queues; i++) {
1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1062 if (prev_state == VNIC_CLOSED)
1063 enable_irq(adapter->rx_scrq[i]->irq);
1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1067 for (i = 0; i < adapter->req_tx_queues; i++) {
1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1069 if (prev_state == VNIC_CLOSED)
1070 enable_irq(adapter->tx_scrq[i]->irq);
1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1076 for (i = 0; i < adapter->req_rx_queues; i++)
1077 napi_disable(&adapter->napi[i]);
1078 release_resources(adapter);
1082 netif_tx_start_all_queues(netdev);
1084 if (prev_state == VNIC_CLOSED) {
1085 for (i = 0; i < adapter->req_rx_queues; i++)
1086 napi_schedule(&adapter->napi[i]);
1089 adapter->state = VNIC_OPEN;
1093 static int ibmvnic_open(struct net_device *netdev)
1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1098 /* If device failover is pending, just set device state and return.
1099 * Device operation will be handled by reset routine.
1101 if (adapter->failover_pending) {
1102 adapter->state = VNIC_OPEN;
1106 if (adapter->state != VNIC_CLOSED) {
1107 rc = ibmvnic_login(netdev);
1111 rc = init_resources(adapter);
1113 netdev_err(netdev, "failed to initialize resources\n");
1114 release_resources(adapter);
1119 rc = __ibmvnic_open(netdev);
1120 netif_carrier_on(netdev);
1125 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1127 struct ibmvnic_rx_pool *rx_pool;
1128 struct ibmvnic_rx_buff *rx_buff;
1133 if (!adapter->rx_pool)
1136 rx_scrqs = adapter->num_active_rx_pools;
1137 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1139 /* Free any remaining skbs in the rx buffer pools */
1140 for (i = 0; i < rx_scrqs; i++) {
1141 rx_pool = &adapter->rx_pool[i];
1142 if (!rx_pool || !rx_pool->rx_buff)
1145 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1146 for (j = 0; j < rx_entries; j++) {
1147 rx_buff = &rx_pool->rx_buff[j];
1148 if (rx_buff && rx_buff->skb) {
1149 dev_kfree_skb_any(rx_buff->skb);
1150 rx_buff->skb = NULL;
1156 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1157 struct ibmvnic_tx_pool *tx_pool)
1159 struct ibmvnic_tx_buff *tx_buff;
1163 if (!tx_pool || !tx_pool->tx_buff)
1166 tx_entries = tx_pool->num_buffers;
1168 for (i = 0; i < tx_entries; i++) {
1169 tx_buff = &tx_pool->tx_buff[i];
1170 if (tx_buff && tx_buff->skb) {
1171 dev_kfree_skb_any(tx_buff->skb);
1172 tx_buff->skb = NULL;
1177 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1182 if (!adapter->tx_pool || !adapter->tso_pool)
1185 tx_scrqs = adapter->num_active_tx_pools;
1187 /* Free any remaining skbs in the tx buffer pools */
1188 for (i = 0; i < tx_scrqs; i++) {
1189 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1190 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1191 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1195 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1197 struct net_device *netdev = adapter->netdev;
1200 if (adapter->tx_scrq) {
1201 for (i = 0; i < adapter->req_tx_queues; i++)
1202 if (adapter->tx_scrq[i]->irq) {
1204 "Disabling tx_scrq[%d] irq\n", i);
1205 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1206 disable_irq(adapter->tx_scrq[i]->irq);
1210 if (adapter->rx_scrq) {
1211 for (i = 0; i < adapter->req_rx_queues; i++) {
1212 if (adapter->rx_scrq[i]->irq) {
1214 "Disabling rx_scrq[%d] irq\n", i);
1215 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1216 disable_irq(adapter->rx_scrq[i]->irq);
1222 static void ibmvnic_cleanup(struct net_device *netdev)
1224 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1226 /* ensure that transmissions are stopped if called by do_reset */
1227 if (adapter->resetting)
1228 netif_tx_disable(netdev);
1230 netif_tx_stop_all_queues(netdev);
1232 ibmvnic_napi_disable(adapter);
1233 ibmvnic_disable_irqs(adapter);
1235 clean_rx_pools(adapter);
1236 clean_tx_pools(adapter);
1239 static int __ibmvnic_close(struct net_device *netdev)
1241 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1244 adapter->state = VNIC_CLOSING;
1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1248 adapter->state = VNIC_CLOSED;
1252 static int ibmvnic_close(struct net_device *netdev)
1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1257 /* If device failover is pending, just set device state and return.
1258 * Device operation will be handled by reset routine.
1260 if (adapter->failover_pending) {
1261 adapter->state = VNIC_CLOSED;
1265 rc = __ibmvnic_close(netdev);
1266 ibmvnic_cleanup(netdev);
1272 * build_hdr_data - creates L2/L3/L4 header data buffer
1273 * @hdr_field - bitfield determining needed headers
1274 * @skb - socket buffer
1275 * @hdr_len - array of header lengths
1276 * @tot_len - total length of data
1278 * Reads hdr_field to determine which headers are needed by firmware.
1279 * Builds a buffer containing these headers. Saves individual header
1280 * lengths and total buffer length to be used to build descriptors.
1282 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1283 int *hdr_len, u8 *hdr_data)
1288 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1289 hdr_len[0] = sizeof(struct vlan_ethhdr);
1291 hdr_len[0] = sizeof(struct ethhdr);
1293 if (skb->protocol == htons(ETH_P_IP)) {
1294 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1295 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1296 hdr_len[2] = tcp_hdrlen(skb);
1297 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1298 hdr_len[2] = sizeof(struct udphdr);
1299 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1300 hdr_len[1] = sizeof(struct ipv6hdr);
1301 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1302 hdr_len[2] = tcp_hdrlen(skb);
1303 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1304 hdr_len[2] = sizeof(struct udphdr);
1305 } else if (skb->protocol == htons(ETH_P_ARP)) {
1306 hdr_len[1] = arp_hdr_len(skb->dev);
1310 memset(hdr_data, 0, 120);
1311 if ((hdr_field >> 6) & 1) {
1312 hdr = skb_mac_header(skb);
1313 memcpy(hdr_data, hdr, hdr_len[0]);
1317 if ((hdr_field >> 5) & 1) {
1318 hdr = skb_network_header(skb);
1319 memcpy(hdr_data + len, hdr, hdr_len[1]);
1323 if ((hdr_field >> 4) & 1) {
1324 hdr = skb_transport_header(skb);
1325 memcpy(hdr_data + len, hdr, hdr_len[2]);
1332 * create_hdr_descs - create header and header extension descriptors
1333 * @hdr_field - bitfield determining needed headers
1334 * @data - buffer containing header data
1335 * @len - length of data buffer
1336 * @hdr_len - array of individual header lengths
1337 * @scrq_arr - descriptor array
1339 * Creates header and, if needed, header extension descriptors and
1340 * places them in a descriptor array, scrq_arr
1343 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1344 union sub_crq *scrq_arr)
1346 union sub_crq hdr_desc;
1352 while (tmp_len > 0) {
1353 cur = hdr_data + len - tmp_len;
1355 memset(&hdr_desc, 0, sizeof(hdr_desc));
1356 if (cur != hdr_data) {
1357 data = hdr_desc.hdr_ext.data;
1358 tmp = tmp_len > 29 ? 29 : tmp_len;
1359 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1360 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1361 hdr_desc.hdr_ext.len = tmp;
1363 data = hdr_desc.hdr.data;
1364 tmp = tmp_len > 24 ? 24 : tmp_len;
1365 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1366 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1367 hdr_desc.hdr.len = tmp;
1368 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1369 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1370 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1371 hdr_desc.hdr.flag = hdr_field << 1;
1373 memcpy(data, cur, tmp);
1375 *scrq_arr = hdr_desc;
1384 * build_hdr_descs_arr - build a header descriptor array
1385 * @skb - socket buffer
1386 * @num_entries - number of descriptors to be sent
1387 * @subcrq - first TX descriptor
1388 * @hdr_field - bit field determining which headers will be sent
1390 * This function will build a TX descriptor array with applicable
1391 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1394 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1395 int *num_entries, u8 hdr_field)
1397 int hdr_len[3] = {0, 0, 0};
1399 u8 *hdr_data = txbuff->hdr_data;
1401 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1403 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1404 txbuff->indir_arr + 1);
1407 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1408 struct net_device *netdev)
1410 /* For some backing devices, mishandling of small packets
1411 * can result in a loss of connection or TX stall. Device
1412 * architects recommend that no packet should be smaller
1413 * than the minimum MTU value provided to the driver, so
1414 * pad any packets to that length
1416 if (skb->len < netdev->min_mtu)
1417 return skb_put_padto(skb, netdev->min_mtu);
1422 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1424 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1425 int queue_num = skb_get_queue_mapping(skb);
1426 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1427 struct device *dev = &adapter->vdev->dev;
1428 struct ibmvnic_tx_buff *tx_buff = NULL;
1429 struct ibmvnic_sub_crq_queue *tx_scrq;
1430 struct ibmvnic_tx_pool *tx_pool;
1431 unsigned int tx_send_failed = 0;
1432 unsigned int tx_map_failed = 0;
1433 unsigned int tx_dropped = 0;
1434 unsigned int tx_packets = 0;
1435 unsigned int tx_bytes = 0;
1436 dma_addr_t data_dma_addr;
1437 struct netdev_queue *txq;
1438 unsigned long lpar_rc;
1439 union sub_crq tx_crq;
1440 unsigned int offset;
1441 int num_entries = 1;
1446 netdev_tx_t ret = NETDEV_TX_OK;
1448 if (adapter->resetting) {
1449 if (!netif_subqueue_stopped(netdev, skb))
1450 netif_stop_subqueue(netdev, queue_num);
1451 dev_kfree_skb_any(skb);
1459 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1465 if (skb_is_gso(skb))
1466 tx_pool = &adapter->tso_pool[queue_num];
1468 tx_pool = &adapter->tx_pool[queue_num];
1470 tx_scrq = adapter->tx_scrq[queue_num];
1471 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1472 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1473 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1475 index = tx_pool->free_map[tx_pool->consumer_index];
1477 if (index == IBMVNIC_INVALID_MAP) {
1478 dev_kfree_skb_any(skb);
1485 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1487 offset = index * tx_pool->buf_size;
1488 dst = tx_pool->long_term_buff.buff + offset;
1489 memset(dst, 0, tx_pool->buf_size);
1490 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1492 if (skb_shinfo(skb)->nr_frags) {
1496 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1497 cur = skb_headlen(skb);
1499 /* Copy the frags */
1500 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1501 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1504 page_address(skb_frag_page(frag)) +
1505 frag->page_offset, skb_frag_size(frag));
1506 cur += skb_frag_size(frag);
1509 skb_copy_from_linear_data(skb, dst, skb->len);
1512 tx_pool->consumer_index =
1513 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1515 tx_buff = &tx_pool->tx_buff[index];
1517 tx_buff->data_dma[0] = data_dma_addr;
1518 tx_buff->data_len[0] = skb->len;
1519 tx_buff->index = index;
1520 tx_buff->pool_index = queue_num;
1521 tx_buff->last_frag = true;
1523 memset(&tx_crq, 0, sizeof(tx_crq));
1524 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1525 tx_crq.v1.type = IBMVNIC_TX_DESC;
1526 tx_crq.v1.n_crq_elem = 1;
1527 tx_crq.v1.n_sge = 1;
1528 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1530 if (skb_is_gso(skb))
1531 tx_crq.v1.correlator =
1532 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1534 tx_crq.v1.correlator = cpu_to_be32(index);
1535 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1536 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1537 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1539 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1540 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1541 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1544 if (skb->protocol == htons(ETH_P_IP)) {
1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1546 proto = ip_hdr(skb)->protocol;
1547 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1549 proto = ipv6_hdr(skb)->nexthdr;
1552 if (proto == IPPROTO_TCP)
1553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1554 else if (proto == IPPROTO_UDP)
1555 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1557 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1558 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1561 if (skb_is_gso(skb)) {
1562 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1563 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1566 /* determine if l2/3/4 headers are sent to firmware */
1567 if ((*hdrs >> 7) & 1) {
1568 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1569 tx_crq.v1.n_crq_elem = num_entries;
1570 tx_buff->num_entries = num_entries;
1571 tx_buff->indir_arr[0] = tx_crq;
1572 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1573 sizeof(tx_buff->indir_arr),
1575 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1576 dev_kfree_skb_any(skb);
1577 tx_buff->skb = NULL;
1578 if (!firmware_has_feature(FW_FEATURE_CMO))
1579 dev_err(dev, "tx: unable to map descriptor array\n");
1585 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1586 (u64)tx_buff->indir_dma,
1589 tx_buff->num_entries = num_entries;
1590 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1593 if (lpar_rc != H_SUCCESS) {
1594 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1595 dev_err_ratelimited(dev, "tx: send failed\n");
1596 dev_kfree_skb_any(skb);
1597 tx_buff->skb = NULL;
1599 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1600 /* Disable TX and report carrier off if queue is closed
1601 * or pending failover.
1602 * Firmware guarantees that a signal will be sent to the
1603 * driver, triggering a reset or some other action.
1605 netif_tx_stop_all_queues(netdev);
1606 netif_carrier_off(netdev);
1615 if (atomic_add_return(num_entries, &tx_scrq->used)
1616 >= adapter->req_tx_entries_per_subcrq) {
1617 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1618 netif_stop_subqueue(netdev, queue_num);
1622 tx_bytes += skb->len;
1623 txq->trans_start = jiffies;
1628 /* roll back consumer index and map array*/
1629 if (tx_pool->consumer_index == 0)
1630 tx_pool->consumer_index =
1631 tx_pool->num_buffers - 1;
1633 tx_pool->consumer_index--;
1634 tx_pool->free_map[tx_pool->consumer_index] = index;
1636 netdev->stats.tx_dropped += tx_dropped;
1637 netdev->stats.tx_bytes += tx_bytes;
1638 netdev->stats.tx_packets += tx_packets;
1639 adapter->tx_send_failed += tx_send_failed;
1640 adapter->tx_map_failed += tx_map_failed;
1641 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1642 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1643 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1648 static void ibmvnic_set_multi(struct net_device *netdev)
1650 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1651 struct netdev_hw_addr *ha;
1652 union ibmvnic_crq crq;
1654 memset(&crq, 0, sizeof(crq));
1655 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1656 crq.request_capability.cmd = REQUEST_CAPABILITY;
1658 if (netdev->flags & IFF_PROMISC) {
1659 if (!adapter->promisc_supported)
1662 if (netdev->flags & IFF_ALLMULTI) {
1663 /* Accept all multicast */
1664 memset(&crq, 0, sizeof(crq));
1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1668 ibmvnic_send_crq(adapter, &crq);
1669 } else if (netdev_mc_empty(netdev)) {
1670 /* Reject all multicast */
1671 memset(&crq, 0, sizeof(crq));
1672 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1673 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1674 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1675 ibmvnic_send_crq(adapter, &crq);
1677 /* Accept one or more multicast(s) */
1678 netdev_for_each_mc_addr(ha, netdev) {
1679 memset(&crq, 0, sizeof(crq));
1680 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1681 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1682 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1683 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1685 ibmvnic_send_crq(adapter, &crq);
1691 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1694 struct sockaddr *addr = p;
1695 union ibmvnic_crq crq;
1698 if (!is_valid_ether_addr(addr->sa_data))
1699 return -EADDRNOTAVAIL;
1701 memset(&crq, 0, sizeof(crq));
1702 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1703 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1704 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1706 init_completion(&adapter->fw_done);
1707 rc = ibmvnic_send_crq(adapter, &crq);
1710 wait_for_completion(&adapter->fw_done);
1711 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1712 return adapter->fw_done_rc ? -EIO : 0;
1715 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1717 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1718 struct sockaddr *addr = p;
1721 if (adapter->state == VNIC_PROBED) {
1722 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1723 adapter->mac_change_pending = true;
1727 rc = __ibmvnic_set_mac(netdev, addr);
1733 * do_reset returns zero if we are able to keep processing reset events, or
1734 * non-zero if we hit a fatal error and must halt.
1736 static int do_reset(struct ibmvnic_adapter *adapter,
1737 struct ibmvnic_rwi *rwi, u32 reset_state)
1739 u64 old_num_rx_queues, old_num_tx_queues;
1740 u64 old_num_rx_slots, old_num_tx_slots;
1741 struct net_device *netdev = adapter->netdev;
1744 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1747 netif_carrier_off(netdev);
1748 adapter->reset_reason = rwi->reset_reason;
1750 old_num_rx_queues = adapter->req_rx_queues;
1751 old_num_tx_queues = adapter->req_tx_queues;
1752 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1753 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1755 ibmvnic_cleanup(netdev);
1757 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1758 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1759 rc = __ibmvnic_close(netdev);
1764 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1765 adapter->wait_for_reset) {
1766 release_resources(adapter);
1767 release_sub_crqs(adapter, 1);
1768 release_crq_queue(adapter);
1771 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1772 /* remove the closed state so when we call open it appears
1773 * we are coming from the probed state.
1775 adapter->state = VNIC_PROBED;
1777 if (adapter->wait_for_reset) {
1778 rc = init_crq_queue(adapter);
1779 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1780 rc = ibmvnic_reenable_crq_queue(adapter);
1781 release_sub_crqs(adapter, 1);
1783 rc = ibmvnic_reset_crq(adapter);
1785 rc = vio_enable_interrupts(adapter->vdev);
1789 netdev_err(adapter->netdev,
1790 "Couldn't initialize crq. rc=%d\n", rc);
1794 rc = ibmvnic_reset_init(adapter);
1796 return IBMVNIC_INIT_FAILED;
1798 /* If the adapter was in PROBE state prior to the reset,
1801 if (reset_state == VNIC_PROBED)
1804 rc = ibmvnic_login(netdev);
1806 adapter->state = reset_state;
1810 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1811 adapter->wait_for_reset) {
1812 rc = init_resources(adapter);
1815 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1816 adapter->req_tx_queues != old_num_tx_queues ||
1817 adapter->req_rx_add_entries_per_subcrq !=
1819 adapter->req_tx_entries_per_subcrq !=
1821 release_rx_pools(adapter);
1822 release_tx_pools(adapter);
1823 release_napi(adapter);
1824 release_vpd_data(adapter);
1826 rc = init_resources(adapter);
1831 rc = reset_tx_pools(adapter);
1835 rc = reset_rx_pools(adapter);
1839 ibmvnic_disable_irqs(adapter);
1841 adapter->state = VNIC_CLOSED;
1843 if (reset_state == VNIC_CLOSED)
1846 rc = __ibmvnic_open(netdev);
1848 if (list_empty(&adapter->rwi_list))
1849 adapter->state = VNIC_CLOSED;
1851 adapter->state = reset_state;
1857 for (i = 0; i < adapter->req_rx_queues; i++)
1858 napi_schedule(&adapter->napi[i]);
1860 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1861 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1862 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1864 netif_carrier_on(netdev);
1869 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1870 struct ibmvnic_rwi *rwi, u32 reset_state)
1872 struct net_device *netdev = adapter->netdev;
1875 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1878 netif_carrier_off(netdev);
1879 adapter->reset_reason = rwi->reset_reason;
1881 ibmvnic_cleanup(netdev);
1882 release_resources(adapter);
1883 release_sub_crqs(adapter, 0);
1884 release_crq_queue(adapter);
1886 /* remove the closed state so when we call open it appears
1887 * we are coming from the probed state.
1889 adapter->state = VNIC_PROBED;
1891 rc = init_crq_queue(adapter);
1893 netdev_err(adapter->netdev,
1894 "Couldn't initialize crq. rc=%d\n", rc);
1898 rc = ibmvnic_init(adapter);
1902 /* If the adapter was in PROBE state prior to the reset,
1905 if (reset_state == VNIC_PROBED)
1908 rc = ibmvnic_login(netdev);
1910 adapter->state = VNIC_PROBED;
1914 rc = init_resources(adapter);
1918 ibmvnic_disable_irqs(adapter);
1919 adapter->state = VNIC_CLOSED;
1921 if (reset_state == VNIC_CLOSED)
1924 rc = __ibmvnic_open(netdev);
1926 if (list_empty(&adapter->rwi_list))
1927 adapter->state = VNIC_CLOSED;
1929 adapter->state = reset_state;
1934 netif_carrier_on(netdev);
1939 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1941 struct ibmvnic_rwi *rwi;
1942 unsigned long flags;
1944 spin_lock_irqsave(&adapter->rwi_lock, flags);
1946 if (!list_empty(&adapter->rwi_list)) {
1947 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1949 list_del(&rwi->list);
1954 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1958 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1960 struct ibmvnic_rwi *rwi;
1962 rwi = get_next_rwi(adapter);
1965 rwi = get_next_rwi(adapter);
1969 static void __ibmvnic_reset(struct work_struct *work)
1971 struct ibmvnic_rwi *rwi;
1972 struct ibmvnic_adapter *adapter;
1973 struct net_device *netdev;
1974 bool we_lock_rtnl = false;
1978 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1979 netdev = adapter->netdev;
1981 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1982 * unless wait_for_reset is set, in which case the rtnl lock
1983 * has already been taken before initializing the reset
1985 if (!adapter->wait_for_reset) {
1987 we_lock_rtnl = true;
1989 reset_state = adapter->state;
1991 rwi = get_next_rwi(adapter);
1993 if (adapter->force_reset_recovery) {
1994 adapter->force_reset_recovery = false;
1995 rc = do_hard_reset(adapter, rwi, reset_state);
1997 rc = do_reset(adapter, rwi, reset_state);
2000 if (rc && rc != IBMVNIC_INIT_FAILED &&
2001 !adapter->force_reset_recovery)
2004 rwi = get_next_rwi(adapter);
2007 if (adapter->wait_for_reset) {
2008 adapter->wait_for_reset = false;
2009 adapter->reset_done_rc = rc;
2010 complete(&adapter->reset_done);
2014 netdev_dbg(adapter->netdev, "Reset failed\n");
2015 free_all_rwi(adapter);
2018 adapter->resetting = false;
2023 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2024 enum ibmvnic_reset_reason reason)
2026 struct list_head *entry, *tmp_entry;
2027 struct ibmvnic_rwi *rwi, *tmp;
2028 struct net_device *netdev = adapter->netdev;
2029 unsigned long flags;
2032 if (adapter->state == VNIC_REMOVING ||
2033 adapter->state == VNIC_REMOVED ||
2034 adapter->failover_pending) {
2036 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2040 if (adapter->state == VNIC_PROBING) {
2041 netdev_warn(netdev, "Adapter reset during probe\n");
2042 ret = adapter->init_done_rc = EAGAIN;
2046 spin_lock_irqsave(&adapter->rwi_lock, flags);
2048 list_for_each(entry, &adapter->rwi_list) {
2049 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2050 if (tmp->reset_reason == reason) {
2051 netdev_dbg(netdev, "Skipping matching reset\n");
2052 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2058 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2060 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2061 ibmvnic_close(netdev);
2065 /* if we just received a transport event,
2066 * flush reset queue and process this reset
2068 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2069 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2072 rwi->reset_reason = reason;
2073 list_add_tail(&rwi->list, &adapter->rwi_list);
2074 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2075 adapter->resetting = true;
2076 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2077 schedule_work(&adapter->ibmvnic_reset);
2081 if (adapter->wait_for_reset)
2082 adapter->wait_for_reset = false;
2086 static void ibmvnic_tx_timeout(struct net_device *dev)
2088 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2090 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2093 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2094 struct ibmvnic_rx_buff *rx_buff)
2096 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2098 rx_buff->skb = NULL;
2100 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2101 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2103 atomic_dec(&pool->available);
2106 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2108 struct net_device *netdev = napi->dev;
2109 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2110 int scrq_num = (int)(napi - adapter->napi);
2111 int frames_processed = 0;
2114 while (frames_processed < budget) {
2115 struct sk_buff *skb;
2116 struct ibmvnic_rx_buff *rx_buff;
2117 union sub_crq *next;
2122 if (unlikely(adapter->resetting &&
2123 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2124 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2125 napi_complete_done(napi, frames_processed);
2126 return frames_processed;
2129 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2131 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2133 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2134 rx_comp.correlator);
2135 /* do error checking */
2136 if (next->rx_comp.rc) {
2137 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2138 be16_to_cpu(next->rx_comp.rc));
2139 /* free the entry */
2140 next->rx_comp.first = 0;
2141 dev_kfree_skb_any(rx_buff->skb);
2142 remove_buff_from_pool(adapter, rx_buff);
2144 } else if (!rx_buff->skb) {
2145 /* free the entry */
2146 next->rx_comp.first = 0;
2147 remove_buff_from_pool(adapter, rx_buff);
2151 length = be32_to_cpu(next->rx_comp.len);
2152 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2153 flags = next->rx_comp.flags;
2155 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2158 /* VLAN Header has been stripped by the system firmware and
2159 * needs to be inserted by the driver
2161 if (adapter->rx_vlan_header_insertion &&
2162 (flags & IBMVNIC_VLAN_STRIPPED))
2163 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2164 ntohs(next->rx_comp.vlan_tci));
2166 /* free the entry */
2167 next->rx_comp.first = 0;
2168 remove_buff_from_pool(adapter, rx_buff);
2170 skb_put(skb, length);
2171 skb->protocol = eth_type_trans(skb, netdev);
2172 skb_record_rx_queue(skb, scrq_num);
2174 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2175 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2176 skb->ip_summed = CHECKSUM_UNNECESSARY;
2180 napi_gro_receive(napi, skb); /* send it up */
2181 netdev->stats.rx_packets++;
2182 netdev->stats.rx_bytes += length;
2183 adapter->rx_stats_buffers[scrq_num].packets++;
2184 adapter->rx_stats_buffers[scrq_num].bytes += length;
2188 if (adapter->state != VNIC_CLOSING)
2189 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2191 if (frames_processed < budget) {
2192 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2193 napi_complete_done(napi, frames_processed);
2194 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2195 napi_reschedule(napi)) {
2196 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2200 return frames_processed;
2203 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2207 adapter->fallback.mtu = adapter->req_mtu;
2208 adapter->fallback.rx_queues = adapter->req_rx_queues;
2209 adapter->fallback.tx_queues = adapter->req_tx_queues;
2210 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2211 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2213 init_completion(&adapter->reset_done);
2214 adapter->wait_for_reset = true;
2215 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2218 wait_for_completion(&adapter->reset_done);
2221 if (adapter->reset_done_rc) {
2223 adapter->desired.mtu = adapter->fallback.mtu;
2224 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2225 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2226 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2227 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2229 init_completion(&adapter->reset_done);
2230 adapter->wait_for_reset = true;
2231 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2234 wait_for_completion(&adapter->reset_done);
2236 adapter->wait_for_reset = false;
2241 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2243 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2245 adapter->desired.mtu = new_mtu + ETH_HLEN;
2247 return wait_for_reset(adapter);
2250 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2251 struct net_device *dev,
2252 netdev_features_t features)
2254 /* Some backing hardware adapters can not
2255 * handle packets with a MSS less than 224
2256 * or with only one segment.
2258 if (skb_is_gso(skb)) {
2259 if (skb_shinfo(skb)->gso_size < 224 ||
2260 skb_shinfo(skb)->gso_segs == 1)
2261 features &= ~NETIF_F_GSO_MASK;
2267 static const struct net_device_ops ibmvnic_netdev_ops = {
2268 .ndo_open = ibmvnic_open,
2269 .ndo_stop = ibmvnic_close,
2270 .ndo_start_xmit = ibmvnic_xmit,
2271 .ndo_set_rx_mode = ibmvnic_set_multi,
2272 .ndo_set_mac_address = ibmvnic_set_mac,
2273 .ndo_validate_addr = eth_validate_addr,
2274 .ndo_tx_timeout = ibmvnic_tx_timeout,
2275 .ndo_change_mtu = ibmvnic_change_mtu,
2276 .ndo_features_check = ibmvnic_features_check,
2279 /* ethtool functions */
2281 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2282 struct ethtool_link_ksettings *cmd)
2284 u32 supported, advertising;
2286 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2288 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2290 cmd->base.speed = SPEED_1000;
2291 cmd->base.duplex = DUPLEX_FULL;
2292 cmd->base.port = PORT_FIBRE;
2293 cmd->base.phy_address = 0;
2294 cmd->base.autoneg = AUTONEG_ENABLE;
2296 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2298 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2304 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2305 struct ethtool_drvinfo *info)
2307 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2309 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2310 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2311 strlcpy(info->fw_version, adapter->fw_version,
2312 sizeof(info->fw_version));
2315 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2317 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2319 return adapter->msg_enable;
2322 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2324 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2326 adapter->msg_enable = data;
2329 static u32 ibmvnic_get_link(struct net_device *netdev)
2331 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2333 /* Don't need to send a query because we request a logical link up at
2334 * init and then we wait for link state indications
2336 return adapter->logical_link_state;
2339 static void ibmvnic_get_ringparam(struct net_device *netdev,
2340 struct ethtool_ringparam *ring)
2342 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2344 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2345 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2346 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2348 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2349 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2351 ring->rx_mini_max_pending = 0;
2352 ring->rx_jumbo_max_pending = 0;
2353 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2354 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2355 ring->rx_mini_pending = 0;
2356 ring->rx_jumbo_pending = 0;
2359 static int ibmvnic_set_ringparam(struct net_device *netdev,
2360 struct ethtool_ringparam *ring)
2362 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2366 adapter->desired.rx_entries = ring->rx_pending;
2367 adapter->desired.tx_entries = ring->tx_pending;
2369 ret = wait_for_reset(adapter);
2372 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2373 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2375 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2376 ring->rx_pending, ring->tx_pending,
2377 adapter->req_rx_add_entries_per_subcrq,
2378 adapter->req_tx_entries_per_subcrq);
2382 static void ibmvnic_get_channels(struct net_device *netdev,
2383 struct ethtool_channels *channels)
2385 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2387 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2388 channels->max_rx = adapter->max_rx_queues;
2389 channels->max_tx = adapter->max_tx_queues;
2391 channels->max_rx = IBMVNIC_MAX_QUEUES;
2392 channels->max_tx = IBMVNIC_MAX_QUEUES;
2395 channels->max_other = 0;
2396 channels->max_combined = 0;
2397 channels->rx_count = adapter->req_rx_queues;
2398 channels->tx_count = adapter->req_tx_queues;
2399 channels->other_count = 0;
2400 channels->combined_count = 0;
2403 static int ibmvnic_set_channels(struct net_device *netdev,
2404 struct ethtool_channels *channels)
2406 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2410 adapter->desired.rx_queues = channels->rx_count;
2411 adapter->desired.tx_queues = channels->tx_count;
2413 ret = wait_for_reset(adapter);
2416 (adapter->req_rx_queues != channels->rx_count ||
2417 adapter->req_tx_queues != channels->tx_count))
2419 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2420 channels->rx_count, channels->tx_count,
2421 adapter->req_rx_queues, adapter->req_tx_queues);
2426 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2428 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2431 switch (stringset) {
2433 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2434 i++, data += ETH_GSTRING_LEN)
2435 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2437 for (i = 0; i < adapter->req_tx_queues; i++) {
2438 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2439 data += ETH_GSTRING_LEN;
2441 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2442 data += ETH_GSTRING_LEN;
2444 snprintf(data, ETH_GSTRING_LEN,
2445 "tx%d_dropped_packets", i);
2446 data += ETH_GSTRING_LEN;
2449 for (i = 0; i < adapter->req_rx_queues; i++) {
2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2451 data += ETH_GSTRING_LEN;
2453 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2454 data += ETH_GSTRING_LEN;
2456 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2457 data += ETH_GSTRING_LEN;
2461 case ETH_SS_PRIV_FLAGS:
2462 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2463 strcpy(data + i * ETH_GSTRING_LEN,
2464 ibmvnic_priv_flags[i]);
2471 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2473 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2477 return ARRAY_SIZE(ibmvnic_stats) +
2478 adapter->req_tx_queues * NUM_TX_STATS +
2479 adapter->req_rx_queues * NUM_RX_STATS;
2480 case ETH_SS_PRIV_FLAGS:
2481 return ARRAY_SIZE(ibmvnic_priv_flags);
2487 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2488 struct ethtool_stats *stats, u64 *data)
2490 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2491 union ibmvnic_crq crq;
2495 memset(&crq, 0, sizeof(crq));
2496 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2497 crq.request_statistics.cmd = REQUEST_STATISTICS;
2498 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2499 crq.request_statistics.len =
2500 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2502 /* Wait for data to be written */
2503 init_completion(&adapter->stats_done);
2504 rc = ibmvnic_send_crq(adapter, &crq);
2507 wait_for_completion(&adapter->stats_done);
2509 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2510 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2511 ibmvnic_stats[i].offset));
2513 for (j = 0; j < adapter->req_tx_queues; j++) {
2514 data[i] = adapter->tx_stats_buffers[j].packets;
2516 data[i] = adapter->tx_stats_buffers[j].bytes;
2518 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2522 for (j = 0; j < adapter->req_rx_queues; j++) {
2523 data[i] = adapter->rx_stats_buffers[j].packets;
2525 data[i] = adapter->rx_stats_buffers[j].bytes;
2527 data[i] = adapter->rx_stats_buffers[j].interrupts;
2532 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2534 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2536 return adapter->priv_flags;
2539 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2541 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2542 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2545 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2547 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2551 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2552 .get_drvinfo = ibmvnic_get_drvinfo,
2553 .get_msglevel = ibmvnic_get_msglevel,
2554 .set_msglevel = ibmvnic_set_msglevel,
2555 .get_link = ibmvnic_get_link,
2556 .get_ringparam = ibmvnic_get_ringparam,
2557 .set_ringparam = ibmvnic_set_ringparam,
2558 .get_channels = ibmvnic_get_channels,
2559 .set_channels = ibmvnic_set_channels,
2560 .get_strings = ibmvnic_get_strings,
2561 .get_sset_count = ibmvnic_get_sset_count,
2562 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2563 .get_link_ksettings = ibmvnic_get_link_ksettings,
2564 .get_priv_flags = ibmvnic_get_priv_flags,
2565 .set_priv_flags = ibmvnic_set_priv_flags,
2568 /* Routines for managing CRQs/sCRQs */
2570 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2571 struct ibmvnic_sub_crq_queue *scrq)
2576 free_irq(scrq->irq, scrq);
2577 irq_dispose_mapping(scrq->irq);
2581 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2582 atomic_set(&scrq->used, 0);
2585 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2586 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2590 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2594 for (i = 0; i < adapter->req_tx_queues; i++) {
2595 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2596 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2601 for (i = 0; i < adapter->req_rx_queues; i++) {
2602 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2603 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2611 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2612 struct ibmvnic_sub_crq_queue *scrq,
2615 struct device *dev = &adapter->vdev->dev;
2618 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2621 /* Close the sub-crqs */
2623 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2624 adapter->vdev->unit_address,
2626 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2629 netdev_err(adapter->netdev,
2630 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2635 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2637 free_pages((unsigned long)scrq->msgs, 2);
2641 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2644 struct device *dev = &adapter->vdev->dev;
2645 struct ibmvnic_sub_crq_queue *scrq;
2648 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2653 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2655 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2656 goto zero_page_failed;
2659 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2661 if (dma_mapping_error(dev, scrq->msg_token)) {
2662 dev_warn(dev, "Couldn't map crq queue messages page\n");
2666 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2667 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2669 if (rc == H_RESOURCE)
2670 rc = ibmvnic_reset_crq(adapter);
2672 if (rc == H_CLOSED) {
2673 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2675 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2679 scrq->adapter = adapter;
2680 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2681 spin_lock_init(&scrq->lock);
2683 netdev_dbg(adapter->netdev,
2684 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2685 scrq->crq_num, scrq->hw_irq, scrq->irq);
2690 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2693 free_pages((unsigned long)scrq->msgs, 2);
2700 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2704 if (adapter->tx_scrq) {
2705 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2706 if (!adapter->tx_scrq[i])
2709 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2711 if (adapter->tx_scrq[i]->irq) {
2712 free_irq(adapter->tx_scrq[i]->irq,
2713 adapter->tx_scrq[i]);
2714 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2715 adapter->tx_scrq[i]->irq = 0;
2718 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2722 kfree(adapter->tx_scrq);
2723 adapter->tx_scrq = NULL;
2724 adapter->num_active_tx_scrqs = 0;
2727 if (adapter->rx_scrq) {
2728 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2729 if (!adapter->rx_scrq[i])
2732 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2734 if (adapter->rx_scrq[i]->irq) {
2735 free_irq(adapter->rx_scrq[i]->irq,
2736 adapter->rx_scrq[i]);
2737 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2738 adapter->rx_scrq[i]->irq = 0;
2741 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2745 kfree(adapter->rx_scrq);
2746 adapter->rx_scrq = NULL;
2747 adapter->num_active_rx_scrqs = 0;
2751 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2752 struct ibmvnic_sub_crq_queue *scrq)
2754 struct device *dev = &adapter->vdev->dev;
2757 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2758 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2760 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2765 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2766 struct ibmvnic_sub_crq_queue *scrq)
2768 struct device *dev = &adapter->vdev->dev;
2771 if (scrq->hw_irq > 0x100000000ULL) {
2772 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2776 if (adapter->resetting &&
2777 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2778 u64 val = (0xff000000) | scrq->hw_irq;
2780 rc = plpar_hcall_norets(H_EOI, val);
2782 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2786 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2787 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2789 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2794 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2795 struct ibmvnic_sub_crq_queue *scrq)
2797 struct device *dev = &adapter->vdev->dev;
2798 struct ibmvnic_tx_pool *tx_pool;
2799 struct ibmvnic_tx_buff *txbuff;
2800 union sub_crq *next;
2806 while (pending_scrq(adapter, scrq)) {
2807 unsigned int pool = scrq->pool_index;
2808 int num_entries = 0;
2810 next = ibmvnic_next_scrq(adapter, scrq);
2811 for (i = 0; i < next->tx_comp.num_comps; i++) {
2812 if (next->tx_comp.rcs[i]) {
2813 dev_err(dev, "tx error %x\n",
2814 next->tx_comp.rcs[i]);
2817 index = be32_to_cpu(next->tx_comp.correlators[i]);
2818 if (index & IBMVNIC_TSO_POOL_MASK) {
2819 tx_pool = &adapter->tso_pool[pool];
2820 index &= ~IBMVNIC_TSO_POOL_MASK;
2822 tx_pool = &adapter->tx_pool[pool];
2825 txbuff = &tx_pool->tx_buff[index];
2827 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2828 if (!txbuff->data_dma[j])
2831 txbuff->data_dma[j] = 0;
2833 /* if sub_crq was sent indirectly */
2834 first = &txbuff->indir_arr[0].generic.first;
2835 if (*first == IBMVNIC_CRQ_CMD) {
2836 dma_unmap_single(dev, txbuff->indir_dma,
2837 sizeof(txbuff->indir_arr),
2842 if (txbuff->last_frag) {
2843 dev_kfree_skb_any(txbuff->skb);
2847 num_entries += txbuff->num_entries;
2849 tx_pool->free_map[tx_pool->producer_index] = index;
2850 tx_pool->producer_index =
2851 (tx_pool->producer_index + 1) %
2852 tx_pool->num_buffers;
2854 /* remove tx_comp scrq*/
2855 next->tx_comp.first = 0;
2857 if (atomic_sub_return(num_entries, &scrq->used) <=
2858 (adapter->req_tx_entries_per_subcrq / 2) &&
2859 __netif_subqueue_stopped(adapter->netdev,
2860 scrq->pool_index)) {
2861 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2862 netdev_dbg(adapter->netdev, "Started queue %d\n",
2867 enable_scrq_irq(adapter, scrq);
2869 if (pending_scrq(adapter, scrq)) {
2870 disable_scrq_irq(adapter, scrq);
2877 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2879 struct ibmvnic_sub_crq_queue *scrq = instance;
2880 struct ibmvnic_adapter *adapter = scrq->adapter;
2882 disable_scrq_irq(adapter, scrq);
2883 ibmvnic_complete_tx(adapter, scrq);
2888 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2890 struct ibmvnic_sub_crq_queue *scrq = instance;
2891 struct ibmvnic_adapter *adapter = scrq->adapter;
2893 /* When booting a kdump kernel we can hit pending interrupts
2894 * prior to completing driver initialization.
2896 if (unlikely(adapter->state != VNIC_OPEN))
2899 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2901 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2902 disable_scrq_irq(adapter, scrq);
2903 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2909 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2911 struct device *dev = &adapter->vdev->dev;
2912 struct ibmvnic_sub_crq_queue *scrq;
2916 for (i = 0; i < adapter->req_tx_queues; i++) {
2917 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2919 scrq = adapter->tx_scrq[i];
2920 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2924 dev_err(dev, "Error mapping irq\n");
2925 goto req_tx_irq_failed;
2928 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2929 0, "ibmvnic_tx", scrq);
2932 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2934 irq_dispose_mapping(scrq->irq);
2935 goto req_tx_irq_failed;
2939 for (i = 0; i < adapter->req_rx_queues; i++) {
2940 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2942 scrq = adapter->rx_scrq[i];
2943 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2946 dev_err(dev, "Error mapping irq\n");
2947 goto req_rx_irq_failed;
2949 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2950 0, "ibmvnic_rx", scrq);
2952 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2954 irq_dispose_mapping(scrq->irq);
2955 goto req_rx_irq_failed;
2961 for (j = 0; j < i; j++) {
2962 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2963 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2965 i = adapter->req_tx_queues;
2967 for (j = 0; j < i; j++) {
2968 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2969 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2971 release_sub_crqs(adapter, 1);
2975 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2977 struct device *dev = &adapter->vdev->dev;
2978 struct ibmvnic_sub_crq_queue **allqueues;
2979 int registered_queues = 0;
2984 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2986 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2990 for (i = 0; i < total_queues; i++) {
2991 allqueues[i] = init_sub_crq_queue(adapter);
2992 if (!allqueues[i]) {
2993 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2996 registered_queues++;
2999 /* Make sure we were able to register the minimum number of queues */
3000 if (registered_queues <
3001 adapter->min_tx_queues + adapter->min_rx_queues) {
3002 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3006 /* Distribute the failed allocated queues*/
3007 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3008 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3011 if (adapter->req_rx_queues > adapter->min_rx_queues)
3012 adapter->req_rx_queues--;
3017 if (adapter->req_tx_queues > adapter->min_tx_queues)
3018 adapter->req_tx_queues--;
3025 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3026 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3027 if (!adapter->tx_scrq)
3030 for (i = 0; i < adapter->req_tx_queues; i++) {
3031 adapter->tx_scrq[i] = allqueues[i];
3032 adapter->tx_scrq[i]->pool_index = i;
3033 adapter->num_active_tx_scrqs++;
3036 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3037 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3038 if (!adapter->rx_scrq)
3041 for (i = 0; i < adapter->req_rx_queues; i++) {
3042 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3043 adapter->rx_scrq[i]->scrq_num = i;
3044 adapter->num_active_rx_scrqs++;
3051 kfree(adapter->tx_scrq);
3052 adapter->tx_scrq = NULL;
3054 for (i = 0; i < registered_queues; i++)
3055 release_sub_crq_queue(adapter, allqueues[i], 1);
3060 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3062 struct device *dev = &adapter->vdev->dev;
3063 union ibmvnic_crq crq;
3067 /* Sub-CRQ entries are 32 byte long */
3068 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3070 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3071 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3072 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3076 if (adapter->desired.mtu)
3077 adapter->req_mtu = adapter->desired.mtu;
3079 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3081 if (!adapter->desired.tx_entries)
3082 adapter->desired.tx_entries =
3083 adapter->max_tx_entries_per_subcrq;
3084 if (!adapter->desired.rx_entries)
3085 adapter->desired.rx_entries =
3086 adapter->max_rx_add_entries_per_subcrq;
3088 max_entries = IBMVNIC_MAX_LTB_SIZE /
3089 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3091 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3092 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3093 adapter->desired.tx_entries = max_entries;
3096 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3097 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3098 adapter->desired.rx_entries = max_entries;
3101 if (adapter->desired.tx_entries)
3102 adapter->req_tx_entries_per_subcrq =
3103 adapter->desired.tx_entries;
3105 adapter->req_tx_entries_per_subcrq =
3106 adapter->max_tx_entries_per_subcrq;
3108 if (adapter->desired.rx_entries)
3109 adapter->req_rx_add_entries_per_subcrq =
3110 adapter->desired.rx_entries;
3112 adapter->req_rx_add_entries_per_subcrq =
3113 adapter->max_rx_add_entries_per_subcrq;
3115 if (adapter->desired.tx_queues)
3116 adapter->req_tx_queues =
3117 adapter->desired.tx_queues;
3119 adapter->req_tx_queues =
3120 adapter->opt_tx_comp_sub_queues;
3122 if (adapter->desired.rx_queues)
3123 adapter->req_rx_queues =
3124 adapter->desired.rx_queues;
3126 adapter->req_rx_queues =
3127 adapter->opt_rx_comp_queues;
3129 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3132 memset(&crq, 0, sizeof(crq));
3133 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3134 crq.request_capability.cmd = REQUEST_CAPABILITY;
3136 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3137 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3138 atomic_inc(&adapter->running_cap_crqs);
3139 ibmvnic_send_crq(adapter, &crq);
3141 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3142 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3143 atomic_inc(&adapter->running_cap_crqs);
3144 ibmvnic_send_crq(adapter, &crq);
3146 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3147 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3148 atomic_inc(&adapter->running_cap_crqs);
3149 ibmvnic_send_crq(adapter, &crq);
3151 crq.request_capability.capability =
3152 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3153 crq.request_capability.number =
3154 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3155 atomic_inc(&adapter->running_cap_crqs);
3156 ibmvnic_send_crq(adapter, &crq);
3158 crq.request_capability.capability =
3159 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3160 crq.request_capability.number =
3161 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3162 atomic_inc(&adapter->running_cap_crqs);
3163 ibmvnic_send_crq(adapter, &crq);
3165 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3166 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3167 atomic_inc(&adapter->running_cap_crqs);
3168 ibmvnic_send_crq(adapter, &crq);
3170 if (adapter->netdev->flags & IFF_PROMISC) {
3171 if (adapter->promisc_supported) {
3172 crq.request_capability.capability =
3173 cpu_to_be16(PROMISC_REQUESTED);
3174 crq.request_capability.number = cpu_to_be64(1);
3175 atomic_inc(&adapter->running_cap_crqs);
3176 ibmvnic_send_crq(adapter, &crq);
3179 crq.request_capability.capability =
3180 cpu_to_be16(PROMISC_REQUESTED);
3181 crq.request_capability.number = cpu_to_be64(0);
3182 atomic_inc(&adapter->running_cap_crqs);
3183 ibmvnic_send_crq(adapter, &crq);
3187 static int pending_scrq(struct ibmvnic_adapter *adapter,
3188 struct ibmvnic_sub_crq_queue *scrq)
3190 union sub_crq *entry = &scrq->msgs[scrq->cur];
3192 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3198 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3199 struct ibmvnic_sub_crq_queue *scrq)
3201 union sub_crq *entry;
3202 unsigned long flags;
3204 spin_lock_irqsave(&scrq->lock, flags);
3205 entry = &scrq->msgs[scrq->cur];
3206 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3207 if (++scrq->cur == scrq->size)
3212 spin_unlock_irqrestore(&scrq->lock, flags);
3217 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3219 struct ibmvnic_crq_queue *queue = &adapter->crq;
3220 union ibmvnic_crq *crq;
3222 crq = &queue->msgs[queue->cur];
3223 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3224 if (++queue->cur == queue->size)
3233 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3237 dev_warn_ratelimited(dev,
3238 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3242 dev_warn_ratelimited(dev,
3243 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3247 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3252 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3253 union sub_crq *sub_crq)
3255 unsigned int ua = adapter->vdev->unit_address;
3256 struct device *dev = &adapter->vdev->dev;
3257 u64 *u64_crq = (u64 *)sub_crq;
3260 netdev_dbg(adapter->netdev,
3261 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3262 (unsigned long int)cpu_to_be64(remote_handle),
3263 (unsigned long int)cpu_to_be64(u64_crq[0]),
3264 (unsigned long int)cpu_to_be64(u64_crq[1]),
3265 (unsigned long int)cpu_to_be64(u64_crq[2]),
3266 (unsigned long int)cpu_to_be64(u64_crq[3]));
3268 /* Make sure the hypervisor sees the complete request */
3271 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3272 cpu_to_be64(remote_handle),
3273 cpu_to_be64(u64_crq[0]),
3274 cpu_to_be64(u64_crq[1]),
3275 cpu_to_be64(u64_crq[2]),
3276 cpu_to_be64(u64_crq[3]));
3279 print_subcrq_error(dev, rc, __func__);
3284 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3285 u64 remote_handle, u64 ioba, u64 num_entries)
3287 unsigned int ua = adapter->vdev->unit_address;
3288 struct device *dev = &adapter->vdev->dev;
3291 /* Make sure the hypervisor sees the complete request */
3293 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3294 cpu_to_be64(remote_handle),
3298 print_subcrq_error(dev, rc, __func__);
3303 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3304 union ibmvnic_crq *crq)
3306 unsigned int ua = adapter->vdev->unit_address;
3307 struct device *dev = &adapter->vdev->dev;
3308 u64 *u64_crq = (u64 *)crq;
3311 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3312 (unsigned long int)cpu_to_be64(u64_crq[0]),
3313 (unsigned long int)cpu_to_be64(u64_crq[1]));
3315 if (!adapter->crq.active &&
3316 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3317 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3321 /* Make sure the hypervisor sees the complete request */
3324 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3325 cpu_to_be64(u64_crq[0]),
3326 cpu_to_be64(u64_crq[1]));
3329 if (rc == H_CLOSED) {
3330 dev_warn(dev, "CRQ Queue closed\n");
3331 if (adapter->resetting)
3332 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3335 dev_warn(dev, "Send error (rc=%d)\n", rc);
3341 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3343 union ibmvnic_crq crq;
3345 memset(&crq, 0, sizeof(crq));
3346 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3347 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3348 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3350 return ibmvnic_send_crq(adapter, &crq);
3353 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3355 union ibmvnic_crq crq;
3357 memset(&crq, 0, sizeof(crq));
3358 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3359 crq.version_exchange.cmd = VERSION_EXCHANGE;
3360 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3362 return ibmvnic_send_crq(adapter, &crq);
3365 struct vnic_login_client_data {
3371 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3375 /* Calculate the amount of buffer space needed for the
3376 * vnic client data in the login buffer. There are four entries,
3377 * OS name, LPAR name, device name, and a null last entry.
3379 len = 4 * sizeof(struct vnic_login_client_data);
3380 len += 6; /* "Linux" plus NULL */
3381 len += strlen(utsname()->nodename) + 1;
3382 len += strlen(adapter->netdev->name) + 1;
3387 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3388 struct vnic_login_client_data *vlcd)
3390 const char *os_name = "Linux";
3393 /* Type 1 - LPAR OS */
3395 len = strlen(os_name) + 1;
3396 vlcd->len = cpu_to_be16(len);
3397 strncpy(vlcd->name, os_name, len);
3398 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3400 /* Type 2 - LPAR name */
3402 len = strlen(utsname()->nodename) + 1;
3403 vlcd->len = cpu_to_be16(len);
3404 strncpy(vlcd->name, utsname()->nodename, len);
3405 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3407 /* Type 3 - device name */
3409 len = strlen(adapter->netdev->name) + 1;
3410 vlcd->len = cpu_to_be16(len);
3411 strncpy(vlcd->name, adapter->netdev->name, len);
3414 static int send_login(struct ibmvnic_adapter *adapter)
3416 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3417 struct ibmvnic_login_buffer *login_buffer;
3418 struct device *dev = &adapter->vdev->dev;
3419 dma_addr_t rsp_buffer_token;
3420 dma_addr_t buffer_token;
3421 size_t rsp_buffer_size;
3422 union ibmvnic_crq crq;
3426 int client_data_len;
3427 struct vnic_login_client_data *vlcd;
3430 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3431 netdev_err(adapter->netdev,
3432 "RX or TX queues are not allocated, device login failed\n");
3436 release_login_rsp_buffer(adapter);
3437 client_data_len = vnic_client_data_len(adapter);
3440 sizeof(struct ibmvnic_login_buffer) +
3441 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3444 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3446 goto buf_alloc_failed;
3448 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3450 if (dma_mapping_error(dev, buffer_token)) {
3451 dev_err(dev, "Couldn't map login buffer\n");
3452 goto buf_map_failed;
3455 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3456 sizeof(u64) * adapter->req_tx_queues +
3457 sizeof(u64) * adapter->req_rx_queues +
3458 sizeof(u64) * adapter->req_rx_queues +
3459 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3461 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3462 if (!login_rsp_buffer)
3463 goto buf_rsp_alloc_failed;
3465 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3466 rsp_buffer_size, DMA_FROM_DEVICE);
3467 if (dma_mapping_error(dev, rsp_buffer_token)) {
3468 dev_err(dev, "Couldn't map login rsp buffer\n");
3469 goto buf_rsp_map_failed;
3472 adapter->login_buf = login_buffer;
3473 adapter->login_buf_token = buffer_token;
3474 adapter->login_buf_sz = buffer_size;
3475 adapter->login_rsp_buf = login_rsp_buffer;
3476 adapter->login_rsp_buf_token = rsp_buffer_token;
3477 adapter->login_rsp_buf_sz = rsp_buffer_size;
3479 login_buffer->len = cpu_to_be32(buffer_size);
3480 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3481 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3482 login_buffer->off_txcomp_subcrqs =
3483 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3484 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3485 login_buffer->off_rxcomp_subcrqs =
3486 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3487 sizeof(u64) * adapter->req_tx_queues);
3488 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3489 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3491 tx_list_p = (__be64 *)((char *)login_buffer +
3492 sizeof(struct ibmvnic_login_buffer));
3493 rx_list_p = (__be64 *)((char *)login_buffer +
3494 sizeof(struct ibmvnic_login_buffer) +
3495 sizeof(u64) * adapter->req_tx_queues);
3497 for (i = 0; i < adapter->req_tx_queues; i++) {
3498 if (adapter->tx_scrq[i]) {
3499 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3504 for (i = 0; i < adapter->req_rx_queues; i++) {
3505 if (adapter->rx_scrq[i]) {
3506 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3511 /* Insert vNIC login client data */
3512 vlcd = (struct vnic_login_client_data *)
3513 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3514 login_buffer->client_data_offset =
3515 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3516 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3518 vnic_add_client_data(adapter, vlcd);
3520 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3521 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3522 netdev_dbg(adapter->netdev, "%016lx\n",
3523 ((unsigned long int *)(adapter->login_buf))[i]);
3526 memset(&crq, 0, sizeof(crq));
3527 crq.login.first = IBMVNIC_CRQ_CMD;
3528 crq.login.cmd = LOGIN;
3529 crq.login.ioba = cpu_to_be32(buffer_token);
3530 crq.login.len = cpu_to_be32(buffer_size);
3531 ibmvnic_send_crq(adapter, &crq);
3536 kfree(login_rsp_buffer);
3537 buf_rsp_alloc_failed:
3538 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3540 kfree(login_buffer);
3545 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3548 union ibmvnic_crq crq;
3550 memset(&crq, 0, sizeof(crq));
3551 crq.request_map.first = IBMVNIC_CRQ_CMD;
3552 crq.request_map.cmd = REQUEST_MAP;
3553 crq.request_map.map_id = map_id;
3554 crq.request_map.ioba = cpu_to_be32(addr);
3555 crq.request_map.len = cpu_to_be32(len);
3556 return ibmvnic_send_crq(adapter, &crq);
3559 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3561 union ibmvnic_crq crq;
3563 memset(&crq, 0, sizeof(crq));
3564 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3565 crq.request_unmap.cmd = REQUEST_UNMAP;
3566 crq.request_unmap.map_id = map_id;
3567 return ibmvnic_send_crq(adapter, &crq);
3570 static void send_map_query(struct ibmvnic_adapter *adapter)
3572 union ibmvnic_crq crq;
3574 memset(&crq, 0, sizeof(crq));
3575 crq.query_map.first = IBMVNIC_CRQ_CMD;
3576 crq.query_map.cmd = QUERY_MAP;
3577 ibmvnic_send_crq(adapter, &crq);
3580 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3581 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3583 union ibmvnic_crq crq;
3585 atomic_set(&adapter->running_cap_crqs, 0);
3586 memset(&crq, 0, sizeof(crq));
3587 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3588 crq.query_capability.cmd = QUERY_CAPABILITY;
3590 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3591 atomic_inc(&adapter->running_cap_crqs);
3592 ibmvnic_send_crq(adapter, &crq);
3594 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3595 atomic_inc(&adapter->running_cap_crqs);
3596 ibmvnic_send_crq(adapter, &crq);
3598 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3599 atomic_inc(&adapter->running_cap_crqs);
3600 ibmvnic_send_crq(adapter, &crq);
3602 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3603 atomic_inc(&adapter->running_cap_crqs);
3604 ibmvnic_send_crq(adapter, &crq);
3606 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3607 atomic_inc(&adapter->running_cap_crqs);
3608 ibmvnic_send_crq(adapter, &crq);
3610 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3611 atomic_inc(&adapter->running_cap_crqs);
3612 ibmvnic_send_crq(adapter, &crq);
3614 crq.query_capability.capability =
3615 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3616 atomic_inc(&adapter->running_cap_crqs);
3617 ibmvnic_send_crq(adapter, &crq);
3619 crq.query_capability.capability =
3620 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3621 atomic_inc(&adapter->running_cap_crqs);
3622 ibmvnic_send_crq(adapter, &crq);
3624 crq.query_capability.capability =
3625 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3626 atomic_inc(&adapter->running_cap_crqs);
3627 ibmvnic_send_crq(adapter, &crq);
3629 crq.query_capability.capability =
3630 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3631 atomic_inc(&adapter->running_cap_crqs);
3632 ibmvnic_send_crq(adapter, &crq);
3634 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3635 atomic_inc(&adapter->running_cap_crqs);
3636 ibmvnic_send_crq(adapter, &crq);
3638 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3639 atomic_inc(&adapter->running_cap_crqs);
3640 ibmvnic_send_crq(adapter, &crq);
3642 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3643 atomic_inc(&adapter->running_cap_crqs);
3644 ibmvnic_send_crq(adapter, &crq);
3646 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3647 atomic_inc(&adapter->running_cap_crqs);
3648 ibmvnic_send_crq(adapter, &crq);
3650 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3651 atomic_inc(&adapter->running_cap_crqs);
3652 ibmvnic_send_crq(adapter, &crq);
3654 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3655 atomic_inc(&adapter->running_cap_crqs);
3656 ibmvnic_send_crq(adapter, &crq);
3658 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3659 atomic_inc(&adapter->running_cap_crqs);
3660 ibmvnic_send_crq(adapter, &crq);
3662 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3663 atomic_inc(&adapter->running_cap_crqs);
3664 ibmvnic_send_crq(adapter, &crq);
3666 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3667 atomic_inc(&adapter->running_cap_crqs);
3668 ibmvnic_send_crq(adapter, &crq);
3670 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3671 atomic_inc(&adapter->running_cap_crqs);
3672 ibmvnic_send_crq(adapter, &crq);
3674 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3675 atomic_inc(&adapter->running_cap_crqs);
3676 ibmvnic_send_crq(adapter, &crq);
3678 crq.query_capability.capability =
3679 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3680 atomic_inc(&adapter->running_cap_crqs);
3681 ibmvnic_send_crq(adapter, &crq);
3683 crq.query_capability.capability =
3684 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3685 atomic_inc(&adapter->running_cap_crqs);
3686 ibmvnic_send_crq(adapter, &crq);
3688 crq.query_capability.capability =
3689 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3690 atomic_inc(&adapter->running_cap_crqs);
3691 ibmvnic_send_crq(adapter, &crq);
3693 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3694 atomic_inc(&adapter->running_cap_crqs);
3695 ibmvnic_send_crq(adapter, &crq);
3698 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3699 struct ibmvnic_adapter *adapter)
3701 struct device *dev = &adapter->vdev->dev;
3703 if (crq->get_vpd_size_rsp.rc.code) {
3704 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3705 crq->get_vpd_size_rsp.rc.code);
3706 complete(&adapter->fw_done);
3710 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3711 complete(&adapter->fw_done);
3714 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3715 struct ibmvnic_adapter *adapter)
3717 struct device *dev = &adapter->vdev->dev;
3718 unsigned char *substr = NULL;
3719 u8 fw_level_len = 0;
3721 memset(adapter->fw_version, 0, 32);
3723 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3726 if (crq->get_vpd_rsp.rc.code) {
3727 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3728 crq->get_vpd_rsp.rc.code);
3732 /* get the position of the firmware version info
3733 * located after the ASCII 'RM' substring in the buffer
3735 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3737 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3741 /* get length of firmware level ASCII substring */
3742 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3743 fw_level_len = *(substr + 2);
3745 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3749 /* copy firmware version string from vpd into adapter */
3750 if ((substr + 3 + fw_level_len) <
3751 (adapter->vpd->buff + adapter->vpd->len)) {
3752 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3754 dev_info(dev, "FW substr extrapolated VPD buff\n");
3758 if (adapter->fw_version[0] == '\0')
3759 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3760 complete(&adapter->fw_done);
3763 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3765 struct device *dev = &adapter->vdev->dev;
3766 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3767 union ibmvnic_crq crq;
3770 dma_unmap_single(dev, adapter->ip_offload_tok,
3771 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3773 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3774 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3775 netdev_dbg(adapter->netdev, "%016lx\n",
3776 ((unsigned long int *)(buf))[i]);
3778 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3779 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3780 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3781 buf->tcp_ipv4_chksum);
3782 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3783 buf->tcp_ipv6_chksum);
3784 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3785 buf->udp_ipv4_chksum);
3786 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3787 buf->udp_ipv6_chksum);
3788 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3789 buf->large_tx_ipv4);
3790 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3791 buf->large_tx_ipv6);
3792 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3793 buf->large_rx_ipv4);
3794 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3795 buf->large_rx_ipv6);
3796 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3797 buf->max_ipv4_header_size);
3798 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3799 buf->max_ipv6_header_size);
3800 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3801 buf->max_tcp_header_size);
3802 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3803 buf->max_udp_header_size);
3804 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3805 buf->max_large_tx_size);
3806 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3807 buf->max_large_rx_size);
3808 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3809 buf->ipv6_extension_header);
3810 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3811 buf->tcp_pseudosum_req);
3812 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3813 buf->num_ipv6_ext_headers);
3814 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3815 buf->off_ipv6_ext_headers);
3817 adapter->ip_offload_ctrl_tok =
3818 dma_map_single(dev, &adapter->ip_offload_ctrl,
3819 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3821 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3822 dev_err(dev, "Couldn't map ip offload control buffer\n");
3826 adapter->ip_offload_ctrl.len =
3827 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3828 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3829 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3830 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3831 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3832 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3833 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3834 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3835 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3836 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3838 /* large_rx disabled for now, additional features needed */
3839 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3840 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3842 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3844 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3845 adapter->netdev->features |= NETIF_F_IP_CSUM;
3847 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3848 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3850 if ((adapter->netdev->features &
3851 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3852 adapter->netdev->features |= NETIF_F_RXCSUM;
3854 if (buf->large_tx_ipv4)
3855 adapter->netdev->features |= NETIF_F_TSO;
3856 if (buf->large_tx_ipv6)
3857 adapter->netdev->features |= NETIF_F_TSO6;
3859 adapter->netdev->hw_features |= adapter->netdev->features;
3861 memset(&crq, 0, sizeof(crq));
3862 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3863 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3864 crq.control_ip_offload.len =
3865 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3866 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3867 ibmvnic_send_crq(adapter, &crq);
3870 static const char *ibmvnic_fw_err_cause(u16 cause)
3873 case ADAPTER_PROBLEM:
3874 return "adapter problem";
3876 return "bus problem";
3878 return "firmware problem";
3880 return "device driver problem";
3882 return "EEH recovery";
3884 return "firmware updated";
3886 return "low Memory";
3892 static void handle_error_indication(union ibmvnic_crq *crq,
3893 struct ibmvnic_adapter *adapter)
3895 struct device *dev = &adapter->vdev->dev;
3898 cause = be16_to_cpu(crq->error_indication.error_cause);
3900 dev_warn_ratelimited(dev,
3901 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3902 crq->error_indication.flags
3903 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3904 ibmvnic_fw_err_cause(cause));
3906 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3907 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3909 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3912 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3913 struct ibmvnic_adapter *adapter)
3915 struct net_device *netdev = adapter->netdev;
3916 struct device *dev = &adapter->vdev->dev;
3919 rc = crq->change_mac_addr_rsp.rc.code;
3921 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3924 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3927 complete(&adapter->fw_done);
3931 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3932 struct ibmvnic_adapter *adapter)
3934 struct device *dev = &adapter->vdev->dev;
3938 atomic_dec(&adapter->running_cap_crqs);
3939 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3941 req_value = &adapter->req_tx_queues;
3945 req_value = &adapter->req_rx_queues;
3948 case REQ_RX_ADD_QUEUES:
3949 req_value = &adapter->req_rx_add_queues;
3952 case REQ_TX_ENTRIES_PER_SUBCRQ:
3953 req_value = &adapter->req_tx_entries_per_subcrq;
3954 name = "tx_entries_per_subcrq";
3956 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3957 req_value = &adapter->req_rx_add_entries_per_subcrq;
3958 name = "rx_add_entries_per_subcrq";
3961 req_value = &adapter->req_mtu;
3964 case PROMISC_REQUESTED:
3965 req_value = &adapter->promisc;
3969 dev_err(dev, "Got invalid cap request rsp %d\n",
3970 crq->request_capability.capability);
3974 switch (crq->request_capability_rsp.rc.code) {
3977 case PARTIALSUCCESS:
3978 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3980 (long int)be64_to_cpu(crq->request_capability_rsp.
3983 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3985 pr_err("mtu of %llu is not supported. Reverting.\n",
3987 *req_value = adapter->fallback.mtu;
3990 be64_to_cpu(crq->request_capability_rsp.number);
3993 ibmvnic_send_req_caps(adapter, 1);
3996 dev_err(dev, "Error %d in request cap rsp\n",
3997 crq->request_capability_rsp.rc.code);
4001 /* Done receiving requested capabilities, query IP offload support */
4002 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4003 union ibmvnic_crq newcrq;
4004 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4005 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4006 &adapter->ip_offload_buf;
4008 adapter->wait_capability = false;
4009 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4013 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4014 if (!firmware_has_feature(FW_FEATURE_CMO))
4015 dev_err(dev, "Couldn't map offload buffer\n");
4019 memset(&newcrq, 0, sizeof(newcrq));
4020 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4021 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4022 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4023 newcrq.query_ip_offload.ioba =
4024 cpu_to_be32(adapter->ip_offload_tok);
4026 ibmvnic_send_crq(adapter, &newcrq);
4030 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4031 struct ibmvnic_adapter *adapter)
4033 struct device *dev = &adapter->vdev->dev;
4034 struct net_device *netdev = adapter->netdev;
4035 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4036 struct ibmvnic_login_buffer *login = adapter->login_buf;
4039 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4041 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4042 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4044 /* If the number of queues requested can't be allocated by the
4045 * server, the login response will return with code 1. We will need
4046 * to resend the login buffer with fewer queues requested.
4048 if (login_rsp_crq->generic.rc.code) {
4049 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4050 complete(&adapter->init_done);
4054 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4056 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4057 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4058 netdev_dbg(adapter->netdev, "%016lx\n",
4059 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4063 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4064 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4065 adapter->req_rx_add_queues !=
4066 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4067 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4068 ibmvnic_remove(adapter->vdev);
4071 release_login_buffer(adapter);
4072 complete(&adapter->init_done);
4077 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4078 struct ibmvnic_adapter *adapter)
4080 struct device *dev = &adapter->vdev->dev;
4083 rc = crq->request_unmap_rsp.rc.code;
4085 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4088 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4089 struct ibmvnic_adapter *adapter)
4091 struct net_device *netdev = adapter->netdev;
4092 struct device *dev = &adapter->vdev->dev;
4095 rc = crq->query_map_rsp.rc.code;
4097 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4100 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4101 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4102 crq->query_map_rsp.free_pages);
4105 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4106 struct ibmvnic_adapter *adapter)
4108 struct net_device *netdev = adapter->netdev;
4109 struct device *dev = &adapter->vdev->dev;
4112 atomic_dec(&adapter->running_cap_crqs);
4113 netdev_dbg(netdev, "Outstanding queries: %d\n",
4114 atomic_read(&adapter->running_cap_crqs));
4115 rc = crq->query_capability.rc.code;
4117 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4121 switch (be16_to_cpu(crq->query_capability.capability)) {
4123 adapter->min_tx_queues =
4124 be64_to_cpu(crq->query_capability.number);
4125 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4126 adapter->min_tx_queues);
4129 adapter->min_rx_queues =
4130 be64_to_cpu(crq->query_capability.number);
4131 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4132 adapter->min_rx_queues);
4134 case MIN_RX_ADD_QUEUES:
4135 adapter->min_rx_add_queues =
4136 be64_to_cpu(crq->query_capability.number);
4137 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4138 adapter->min_rx_add_queues);
4141 adapter->max_tx_queues =
4142 be64_to_cpu(crq->query_capability.number);
4143 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4144 adapter->max_tx_queues);
4147 adapter->max_rx_queues =
4148 be64_to_cpu(crq->query_capability.number);
4149 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4150 adapter->max_rx_queues);
4152 case MAX_RX_ADD_QUEUES:
4153 adapter->max_rx_add_queues =
4154 be64_to_cpu(crq->query_capability.number);
4155 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4156 adapter->max_rx_add_queues);
4158 case MIN_TX_ENTRIES_PER_SUBCRQ:
4159 adapter->min_tx_entries_per_subcrq =
4160 be64_to_cpu(crq->query_capability.number);
4161 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4162 adapter->min_tx_entries_per_subcrq);
4164 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4165 adapter->min_rx_add_entries_per_subcrq =
4166 be64_to_cpu(crq->query_capability.number);
4167 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4168 adapter->min_rx_add_entries_per_subcrq);
4170 case MAX_TX_ENTRIES_PER_SUBCRQ:
4171 adapter->max_tx_entries_per_subcrq =
4172 be64_to_cpu(crq->query_capability.number);
4173 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4174 adapter->max_tx_entries_per_subcrq);
4176 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4177 adapter->max_rx_add_entries_per_subcrq =
4178 be64_to_cpu(crq->query_capability.number);
4179 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4180 adapter->max_rx_add_entries_per_subcrq);
4182 case TCP_IP_OFFLOAD:
4183 adapter->tcp_ip_offload =
4184 be64_to_cpu(crq->query_capability.number);
4185 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4186 adapter->tcp_ip_offload);
4188 case PROMISC_SUPPORTED:
4189 adapter->promisc_supported =
4190 be64_to_cpu(crq->query_capability.number);
4191 netdev_dbg(netdev, "promisc_supported = %lld\n",
4192 adapter->promisc_supported);
4195 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4196 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4197 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4200 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4201 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4202 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4204 case MAX_MULTICAST_FILTERS:
4205 adapter->max_multicast_filters =
4206 be64_to_cpu(crq->query_capability.number);
4207 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4208 adapter->max_multicast_filters);
4210 case VLAN_HEADER_INSERTION:
4211 adapter->vlan_header_insertion =
4212 be64_to_cpu(crq->query_capability.number);
4213 if (adapter->vlan_header_insertion)
4214 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4215 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4216 adapter->vlan_header_insertion);
4218 case RX_VLAN_HEADER_INSERTION:
4219 adapter->rx_vlan_header_insertion =
4220 be64_to_cpu(crq->query_capability.number);
4221 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4222 adapter->rx_vlan_header_insertion);
4224 case MAX_TX_SG_ENTRIES:
4225 adapter->max_tx_sg_entries =
4226 be64_to_cpu(crq->query_capability.number);
4227 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4228 adapter->max_tx_sg_entries);
4230 case RX_SG_SUPPORTED:
4231 adapter->rx_sg_supported =
4232 be64_to_cpu(crq->query_capability.number);
4233 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4234 adapter->rx_sg_supported);
4236 case OPT_TX_COMP_SUB_QUEUES:
4237 adapter->opt_tx_comp_sub_queues =
4238 be64_to_cpu(crq->query_capability.number);
4239 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4240 adapter->opt_tx_comp_sub_queues);
4242 case OPT_RX_COMP_QUEUES:
4243 adapter->opt_rx_comp_queues =
4244 be64_to_cpu(crq->query_capability.number);
4245 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4246 adapter->opt_rx_comp_queues);
4248 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4249 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4250 be64_to_cpu(crq->query_capability.number);
4251 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4252 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4254 case OPT_TX_ENTRIES_PER_SUBCRQ:
4255 adapter->opt_tx_entries_per_subcrq =
4256 be64_to_cpu(crq->query_capability.number);
4257 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4258 adapter->opt_tx_entries_per_subcrq);
4260 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4261 adapter->opt_rxba_entries_per_subcrq =
4262 be64_to_cpu(crq->query_capability.number);
4263 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4264 adapter->opt_rxba_entries_per_subcrq);
4266 case TX_RX_DESC_REQ:
4267 adapter->tx_rx_desc_req = crq->query_capability.number;
4268 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4269 adapter->tx_rx_desc_req);
4273 netdev_err(netdev, "Got invalid cap rsp %d\n",
4274 crq->query_capability.capability);
4278 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4279 adapter->wait_capability = false;
4280 ibmvnic_send_req_caps(adapter, 0);
4284 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4285 struct ibmvnic_adapter *adapter)
4287 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4288 struct net_device *netdev = adapter->netdev;
4289 struct device *dev = &adapter->vdev->dev;
4290 u64 *u64_crq = (u64 *)crq;
4293 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4294 (unsigned long int)cpu_to_be64(u64_crq[0]),
4295 (unsigned long int)cpu_to_be64(u64_crq[1]));
4296 switch (gen_crq->first) {
4297 case IBMVNIC_CRQ_INIT_RSP:
4298 switch (gen_crq->cmd) {
4299 case IBMVNIC_CRQ_INIT:
4300 dev_info(dev, "Partner initialized\n");
4301 adapter->from_passive_init = true;
4302 adapter->failover_pending = false;
4303 if (!completion_done(&adapter->init_done)) {
4304 complete(&adapter->init_done);
4305 adapter->init_done_rc = -EIO;
4307 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4309 case IBMVNIC_CRQ_INIT_COMPLETE:
4310 dev_info(dev, "Partner initialization complete\n");
4311 adapter->crq.active = true;
4312 send_version_xchg(adapter);
4315 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4318 case IBMVNIC_CRQ_XPORT_EVENT:
4319 netif_carrier_off(netdev);
4320 adapter->crq.active = false;
4321 if (adapter->resetting)
4322 adapter->force_reset_recovery = true;
4323 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4324 dev_info(dev, "Migrated, re-enabling adapter\n");
4325 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4326 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4327 dev_info(dev, "Backing device failover detected\n");
4328 adapter->failover_pending = true;
4330 /* The adapter lost the connection */
4331 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4333 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4336 case IBMVNIC_CRQ_CMD_RSP:
4339 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4344 switch (gen_crq->cmd) {
4345 case VERSION_EXCHANGE_RSP:
4346 rc = crq->version_exchange_rsp.rc.code;
4348 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4351 dev_info(dev, "Partner protocol version is %d\n",
4352 crq->version_exchange_rsp.version);
4353 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4356 be16_to_cpu(crq->version_exchange_rsp.version);
4357 send_cap_queries(adapter);
4359 case QUERY_CAPABILITY_RSP:
4360 handle_query_cap_rsp(crq, adapter);
4363 handle_query_map_rsp(crq, adapter);
4365 case REQUEST_MAP_RSP:
4366 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4367 complete(&adapter->fw_done);
4369 case REQUEST_UNMAP_RSP:
4370 handle_request_unmap_rsp(crq, adapter);
4372 case REQUEST_CAPABILITY_RSP:
4373 handle_request_cap_rsp(crq, adapter);
4376 netdev_dbg(netdev, "Got Login Response\n");
4377 handle_login_rsp(crq, adapter);
4379 case LOGICAL_LINK_STATE_RSP:
4381 "Got Logical Link State Response, state: %d rc: %d\n",
4382 crq->logical_link_state_rsp.link_state,
4383 crq->logical_link_state_rsp.rc.code);
4384 adapter->logical_link_state =
4385 crq->logical_link_state_rsp.link_state;
4386 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4387 complete(&adapter->init_done);
4389 case LINK_STATE_INDICATION:
4390 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4391 adapter->phys_link_state =
4392 crq->link_state_indication.phys_link_state;
4393 adapter->logical_link_state =
4394 crq->link_state_indication.logical_link_state;
4396 case CHANGE_MAC_ADDR_RSP:
4397 netdev_dbg(netdev, "Got MAC address change Response\n");
4398 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4400 case ERROR_INDICATION:
4401 netdev_dbg(netdev, "Got Error Indication\n");
4402 handle_error_indication(crq, adapter);
4404 case REQUEST_STATISTICS_RSP:
4405 netdev_dbg(netdev, "Got Statistics Response\n");
4406 complete(&adapter->stats_done);
4408 case QUERY_IP_OFFLOAD_RSP:
4409 netdev_dbg(netdev, "Got Query IP offload Response\n");
4410 handle_query_ip_offload_rsp(adapter);
4412 case MULTICAST_CTRL_RSP:
4413 netdev_dbg(netdev, "Got multicast control Response\n");
4415 case CONTROL_IP_OFFLOAD_RSP:
4416 netdev_dbg(netdev, "Got Control IP offload Response\n");
4417 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4418 sizeof(adapter->ip_offload_ctrl),
4420 complete(&adapter->init_done);
4422 case COLLECT_FW_TRACE_RSP:
4423 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4424 complete(&adapter->fw_done);
4426 case GET_VPD_SIZE_RSP:
4427 handle_vpd_size_rsp(crq, adapter);
4430 handle_vpd_rsp(crq, adapter);
4433 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4438 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4440 struct ibmvnic_adapter *adapter = instance;
4442 tasklet_schedule(&adapter->tasklet);
4446 static void ibmvnic_tasklet(void *data)
4448 struct ibmvnic_adapter *adapter = data;
4449 struct ibmvnic_crq_queue *queue = &adapter->crq;
4450 union ibmvnic_crq *crq;
4451 unsigned long flags;
4454 spin_lock_irqsave(&queue->lock, flags);
4456 /* Pull all the valid messages off the CRQ */
4457 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4458 ibmvnic_handle_crq(crq, adapter);
4459 crq->generic.first = 0;
4462 /* remain in tasklet until all
4463 * capabilities responses are received
4465 if (!adapter->wait_capability)
4468 /* if capabilities CRQ's were sent in this tasklet, the following
4469 * tasklet must wait until all responses are received
4471 if (atomic_read(&adapter->running_cap_crqs) != 0)
4472 adapter->wait_capability = true;
4473 spin_unlock_irqrestore(&queue->lock, flags);
4476 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4478 struct vio_dev *vdev = adapter->vdev;
4482 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4483 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4486 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4491 static int ibmvnic_reset_crq(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;
4500 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4501 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4503 /* Clean out the queue */
4504 memset(crq->msgs, 0, PAGE_SIZE);
4506 crq->active = false;
4508 /* And re-open it again */
4509 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4510 crq->msg_token, PAGE_SIZE);
4513 /* Adapter is good, but other end is not ready */
4514 dev_warn(dev, "Partner adapter not ready\n");
4516 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4521 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4523 struct ibmvnic_crq_queue *crq = &adapter->crq;
4524 struct vio_dev *vdev = adapter->vdev;
4530 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4531 free_irq(vdev->irq, adapter);
4532 tasklet_kill(&adapter->tasklet);
4534 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4535 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4537 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4539 free_page((unsigned long)crq->msgs);
4541 crq->active = false;
4544 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4546 struct ibmvnic_crq_queue *crq = &adapter->crq;
4547 struct device *dev = &adapter->vdev->dev;
4548 struct vio_dev *vdev = adapter->vdev;
4549 int rc, retrc = -ENOMEM;
4554 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4555 /* Should we allocate more than one page? */
4560 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4561 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4563 if (dma_mapping_error(dev, crq->msg_token))
4566 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4567 crq->msg_token, PAGE_SIZE);
4569 if (rc == H_RESOURCE)
4570 /* maybe kexecing and resource is busy. try a reset */
4571 rc = ibmvnic_reset_crq(adapter);
4574 if (rc == H_CLOSED) {
4575 dev_warn(dev, "Partner adapter not ready\n");
4577 dev_warn(dev, "Error %d opening adapter\n", rc);
4578 goto reg_crq_failed;
4583 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4584 (unsigned long)adapter);
4586 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4587 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4590 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4592 goto req_irq_failed;
4595 rc = vio_enable_interrupts(vdev);
4597 dev_err(dev, "Error %d enabling interrupts\n", rc);
4598 goto req_irq_failed;
4602 spin_lock_init(&crq->lock);
4607 tasklet_kill(&adapter->tasklet);
4609 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4610 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4612 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4614 free_page((unsigned long)crq->msgs);
4619 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4621 struct device *dev = &adapter->vdev->dev;
4622 unsigned long timeout = msecs_to_jiffies(30000);
4623 u64 old_num_rx_queues, old_num_tx_queues;
4626 adapter->from_passive_init = false;
4628 old_num_rx_queues = adapter->req_rx_queues;
4629 old_num_tx_queues = adapter->req_tx_queues;
4631 init_completion(&adapter->init_done);
4632 adapter->init_done_rc = 0;
4633 ibmvnic_send_crq_init(adapter);
4634 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4635 dev_err(dev, "Initialization sequence timed out\n");
4639 if (adapter->init_done_rc) {
4640 release_crq_queue(adapter);
4641 return adapter->init_done_rc;
4644 if (adapter->from_passive_init) {
4645 adapter->state = VNIC_OPEN;
4646 adapter->from_passive_init = false;
4650 if (adapter->resetting && !adapter->wait_for_reset &&
4651 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4652 if (adapter->req_rx_queues != old_num_rx_queues ||
4653 adapter->req_tx_queues != old_num_tx_queues) {
4654 release_sub_crqs(adapter, 0);
4655 rc = init_sub_crqs(adapter);
4657 rc = reset_sub_crq_queues(adapter);
4660 rc = init_sub_crqs(adapter);
4664 dev_err(dev, "Initialization of sub crqs failed\n");
4665 release_crq_queue(adapter);
4669 rc = init_sub_crq_irqs(adapter);
4671 dev_err(dev, "Failed to initialize sub crq irqs\n");
4672 release_crq_queue(adapter);
4678 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4680 struct device *dev = &adapter->vdev->dev;
4681 unsigned long timeout = msecs_to_jiffies(30000);
4684 adapter->from_passive_init = false;
4686 init_completion(&adapter->init_done);
4687 adapter->init_done_rc = 0;
4688 ibmvnic_send_crq_init(adapter);
4689 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4690 dev_err(dev, "Initialization sequence timed out\n");
4694 if (adapter->init_done_rc) {
4695 release_crq_queue(adapter);
4696 return adapter->init_done_rc;
4699 if (adapter->from_passive_init) {
4700 adapter->state = VNIC_OPEN;
4701 adapter->from_passive_init = false;
4705 rc = init_sub_crqs(adapter);
4707 dev_err(dev, "Initialization of sub crqs failed\n");
4708 release_crq_queue(adapter);
4712 rc = init_sub_crq_irqs(adapter);
4714 dev_err(dev, "Failed to initialize sub crq irqs\n");
4715 release_crq_queue(adapter);
4721 static struct device_attribute dev_attr_failover;
4723 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4725 struct ibmvnic_adapter *adapter;
4726 struct net_device *netdev;
4727 unsigned char *mac_addr_p;
4730 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4733 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4734 VETH_MAC_ADDR, NULL);
4737 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4738 __FILE__, __LINE__);
4742 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4743 IBMVNIC_MAX_QUEUES);
4747 adapter = netdev_priv(netdev);
4748 adapter->state = VNIC_PROBING;
4749 dev_set_drvdata(&dev->dev, netdev);
4750 adapter->vdev = dev;
4751 adapter->netdev = netdev;
4753 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4754 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4755 netdev->irq = dev->irq;
4756 netdev->netdev_ops = &ibmvnic_netdev_ops;
4757 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4758 SET_NETDEV_DEV(netdev, &dev->dev);
4760 spin_lock_init(&adapter->stats_lock);
4762 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4763 INIT_LIST_HEAD(&adapter->rwi_list);
4764 spin_lock_init(&adapter->rwi_lock);
4765 adapter->resetting = false;
4767 adapter->mac_change_pending = false;
4770 rc = init_crq_queue(adapter);
4772 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4774 goto ibmvnic_init_fail;
4777 rc = ibmvnic_init(adapter);
4778 if (rc && rc != EAGAIN)
4779 goto ibmvnic_init_fail;
4780 } while (rc == EAGAIN);
4782 rc = init_stats_buffers(adapter);
4784 goto ibmvnic_init_fail;
4786 rc = init_stats_token(adapter);
4788 goto ibmvnic_stats_fail;
4790 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4791 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4792 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4794 rc = device_create_file(&dev->dev, &dev_attr_failover);
4796 goto ibmvnic_dev_file_err;
4798 netif_carrier_off(netdev);
4799 rc = register_netdev(netdev);
4801 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4802 goto ibmvnic_register_fail;
4804 dev_info(&dev->dev, "ibmvnic registered\n");
4806 adapter->state = VNIC_PROBED;
4808 adapter->wait_for_reset = false;
4812 ibmvnic_register_fail:
4813 device_remove_file(&dev->dev, &dev_attr_failover);
4815 ibmvnic_dev_file_err:
4816 release_stats_token(adapter);
4819 release_stats_buffers(adapter);
4822 release_sub_crqs(adapter, 1);
4823 release_crq_queue(adapter);
4824 free_netdev(netdev);
4829 static int ibmvnic_remove(struct vio_dev *dev)
4831 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4832 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4834 adapter->state = VNIC_REMOVING;
4836 unregister_netdevice(netdev);
4838 release_resources(adapter);
4839 release_sub_crqs(adapter, 1);
4840 release_crq_queue(adapter);
4842 release_stats_token(adapter);
4843 release_stats_buffers(adapter);
4845 adapter->state = VNIC_REMOVED;
4848 device_remove_file(&dev->dev, &dev_attr_failover);
4849 free_netdev(netdev);
4850 dev_set_drvdata(&dev->dev, NULL);
4855 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4856 const char *buf, size_t count)
4858 struct net_device *netdev = dev_get_drvdata(dev);
4859 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4860 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4861 __be64 session_token;
4864 if (!sysfs_streq(buf, "1"))
4867 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4868 H_GET_SESSION_TOKEN, 0, 0, 0);
4870 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4875 session_token = (__be64)retbuf[0];
4876 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4877 be64_to_cpu(session_token));
4878 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4879 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4881 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4889 static DEVICE_ATTR_WO(failover);
4891 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4893 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4894 struct ibmvnic_adapter *adapter;
4895 struct iommu_table *tbl;
4896 unsigned long ret = 0;
4899 tbl = get_iommu_table_base(&vdev->dev);
4901 /* netdev inits at probe time along with the structures we need below*/
4903 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4905 adapter = netdev_priv(netdev);
4907 ret += PAGE_SIZE; /* the crq message queue */
4908 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4910 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4911 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4913 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4915 ret += adapter->rx_pool[i].size *
4916 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4921 static int ibmvnic_resume(struct device *dev)
4923 struct net_device *netdev = dev_get_drvdata(dev);
4924 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4926 if (adapter->state != VNIC_OPEN)
4929 tasklet_schedule(&adapter->tasklet);
4934 static const struct vio_device_id ibmvnic_device_table[] = {
4935 {"network", "IBM,vnic"},
4938 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4940 static const struct dev_pm_ops ibmvnic_pm_ops = {
4941 .resume = ibmvnic_resume
4944 static struct vio_driver ibmvnic_driver = {
4945 .id_table = ibmvnic_device_table,
4946 .probe = ibmvnic_probe,
4947 .remove = ibmvnic_remove,
4948 .get_desired_dma = ibmvnic_get_desired_dma,
4949 .name = ibmvnic_driver_name,
4950 .pm = &ibmvnic_pm_ops,
4953 /* module functions */
4954 static int __init ibmvnic_module_init(void)
4956 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4957 IBMVNIC_DRIVER_VERSION);
4959 return vio_register_driver(&ibmvnic_driver);
4962 static void __exit ibmvnic_module_exit(void)
4964 vio_unregister_driver(&ibmvnic_driver);
4967 module_init(ibmvnic_module_init);
4968 module_exit(ibmvnic_module_exit);