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 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
777 netif_napi_del(&adapter->napi[i]);
780 kfree(adapter->napi);
781 adapter->napi = NULL;
782 adapter->num_active_rx_napi = 0;
783 adapter->napi_enabled = false;
786 static int ibmvnic_login(struct net_device *netdev)
788 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
789 unsigned long timeout = msecs_to_jiffies(30000);
796 if (retry_count > IBMVNIC_MAX_QUEUES) {
797 netdev_warn(netdev, "Login attempts exceeded\n");
801 adapter->init_done_rc = 0;
802 reinit_completion(&adapter->init_done);
803 rc = send_login(adapter);
805 netdev_warn(netdev, "Unable to login\n");
809 if (!wait_for_completion_timeout(&adapter->init_done,
811 netdev_warn(netdev, "Login timed out\n");
815 if (adapter->init_done_rc == PARTIALSUCCESS) {
817 release_sub_crqs(adapter, 1);
821 "Received partial success, retrying...\n");
822 adapter->init_done_rc = 0;
823 reinit_completion(&adapter->init_done);
824 send_cap_queries(adapter);
825 if (!wait_for_completion_timeout(&adapter->init_done,
828 "Capabilities query timed out\n");
832 rc = init_sub_crqs(adapter);
835 "SCRQ initialization failed\n");
839 rc = init_sub_crq_irqs(adapter);
842 "SCRQ irq initialization failed\n");
845 } else if (adapter->init_done_rc) {
846 netdev_warn(netdev, "Adapter login failed\n");
851 /* handle pending MAC address changes after successful login */
852 if (adapter->mac_change_pending) {
853 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
854 adapter->mac_change_pending = false;
860 static void release_login_buffer(struct ibmvnic_adapter *adapter)
862 kfree(adapter->login_buf);
863 adapter->login_buf = NULL;
866 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
868 kfree(adapter->login_rsp_buf);
869 adapter->login_rsp_buf = NULL;
872 static void release_resources(struct ibmvnic_adapter *adapter)
874 release_vpd_data(adapter);
876 release_tx_pools(adapter);
877 release_rx_pools(adapter);
879 release_napi(adapter);
880 release_login_rsp_buffer(adapter);
883 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
885 struct net_device *netdev = adapter->netdev;
886 unsigned long timeout = msecs_to_jiffies(30000);
887 union ibmvnic_crq crq;
891 netdev_dbg(netdev, "setting link state %d\n", link_state);
893 memset(&crq, 0, sizeof(crq));
894 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
895 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
896 crq.logical_link_state.link_state = link_state;
901 reinit_completion(&adapter->init_done);
902 rc = ibmvnic_send_crq(adapter, &crq);
904 netdev_err(netdev, "Failed to set link state\n");
908 if (!wait_for_completion_timeout(&adapter->init_done,
910 netdev_err(netdev, "timeout setting link state\n");
914 if (adapter->init_done_rc == 1) {
915 /* Partuial success, delay and re-send */
918 } else if (adapter->init_done_rc) {
919 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
920 adapter->init_done_rc);
921 return adapter->init_done_rc;
928 static int set_real_num_queues(struct net_device *netdev)
930 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
933 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
934 adapter->req_tx_queues, adapter->req_rx_queues);
936 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
938 netdev_err(netdev, "failed to set the number of tx queues\n");
942 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
944 netdev_err(netdev, "failed to set the number of rx queues\n");
949 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
951 struct device *dev = &adapter->vdev->dev;
952 union ibmvnic_crq crq;
956 if (adapter->vpd->buff)
957 len = adapter->vpd->len;
959 init_completion(&adapter->fw_done);
960 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
961 crq.get_vpd_size.cmd = GET_VPD_SIZE;
962 rc = ibmvnic_send_crq(adapter, &crq);
965 wait_for_completion(&adapter->fw_done);
967 if (!adapter->vpd->len)
970 if (!adapter->vpd->buff)
971 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
972 else if (adapter->vpd->len != len)
974 krealloc(adapter->vpd->buff,
975 adapter->vpd->len, GFP_KERNEL);
977 if (!adapter->vpd->buff) {
978 dev_err(dev, "Could allocate VPD buffer\n");
982 adapter->vpd->dma_addr =
983 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
985 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
986 dev_err(dev, "Could not map VPD buffer\n");
987 kfree(adapter->vpd->buff);
988 adapter->vpd->buff = NULL;
992 reinit_completion(&adapter->fw_done);
993 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
994 crq.get_vpd.cmd = GET_VPD;
995 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
996 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
997 rc = ibmvnic_send_crq(adapter, &crq);
999 kfree(adapter->vpd->buff);
1000 adapter->vpd->buff = NULL;
1003 wait_for_completion(&adapter->fw_done);
1008 static int init_resources(struct ibmvnic_adapter *adapter)
1010 struct net_device *netdev = adapter->netdev;
1013 rc = set_real_num_queues(netdev);
1017 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1021 /* Vital Product Data (VPD) */
1022 rc = ibmvnic_get_vpd(adapter);
1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1028 adapter->map_id = 1;
1030 rc = init_napi(adapter);
1034 send_map_query(adapter);
1036 rc = init_rx_pools(netdev);
1040 rc = init_tx_pools(netdev);
1044 static int __ibmvnic_open(struct net_device *netdev)
1046 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1047 enum vnic_state prev_state = adapter->state;
1050 adapter->state = VNIC_OPENING;
1051 replenish_pools(adapter);
1052 ibmvnic_napi_enable(adapter);
1054 /* We're ready to receive frames, enable the sub-crq interrupts and
1055 * set the logical link state to up
1057 for (i = 0; i < adapter->req_rx_queues; i++) {
1058 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1059 if (prev_state == VNIC_CLOSED)
1060 enable_irq(adapter->rx_scrq[i]->irq);
1061 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1064 for (i = 0; i < adapter->req_tx_queues; i++) {
1065 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1066 if (prev_state == VNIC_CLOSED)
1067 enable_irq(adapter->tx_scrq[i]->irq);
1068 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1071 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1073 for (i = 0; i < adapter->req_rx_queues; i++)
1074 napi_disable(&adapter->napi[i]);
1075 release_resources(adapter);
1079 netif_tx_start_all_queues(netdev);
1081 if (prev_state == VNIC_CLOSED) {
1082 for (i = 0; i < adapter->req_rx_queues; i++)
1083 napi_schedule(&adapter->napi[i]);
1086 adapter->state = VNIC_OPEN;
1090 static int ibmvnic_open(struct net_device *netdev)
1092 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1095 /* If device failover is pending, just set device state and return.
1096 * Device operation will be handled by reset routine.
1098 if (adapter->failover_pending) {
1099 adapter->state = VNIC_OPEN;
1103 if (adapter->state != VNIC_CLOSED) {
1104 rc = ibmvnic_login(netdev);
1108 rc = init_resources(adapter);
1110 netdev_err(netdev, "failed to initialize resources\n");
1111 release_resources(adapter);
1116 rc = __ibmvnic_open(netdev);
1117 netif_carrier_on(netdev);
1122 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1124 struct ibmvnic_rx_pool *rx_pool;
1125 struct ibmvnic_rx_buff *rx_buff;
1130 if (!adapter->rx_pool)
1133 rx_scrqs = adapter->num_active_rx_pools;
1134 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1136 /* Free any remaining skbs in the rx buffer pools */
1137 for (i = 0; i < rx_scrqs; i++) {
1138 rx_pool = &adapter->rx_pool[i];
1139 if (!rx_pool || !rx_pool->rx_buff)
1142 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1143 for (j = 0; j < rx_entries; j++) {
1144 rx_buff = &rx_pool->rx_buff[j];
1145 if (rx_buff && rx_buff->skb) {
1146 dev_kfree_skb_any(rx_buff->skb);
1147 rx_buff->skb = NULL;
1153 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1154 struct ibmvnic_tx_pool *tx_pool)
1156 struct ibmvnic_tx_buff *tx_buff;
1160 if (!tx_pool || !tx_pool->tx_buff)
1163 tx_entries = tx_pool->num_buffers;
1165 for (i = 0; i < tx_entries; i++) {
1166 tx_buff = &tx_pool->tx_buff[i];
1167 if (tx_buff && tx_buff->skb) {
1168 dev_kfree_skb_any(tx_buff->skb);
1169 tx_buff->skb = NULL;
1174 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1179 if (!adapter->tx_pool || !adapter->tso_pool)
1182 tx_scrqs = adapter->num_active_tx_pools;
1184 /* Free any remaining skbs in the tx buffer pools */
1185 for (i = 0; i < tx_scrqs; i++) {
1186 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1187 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1188 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1192 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1194 struct net_device *netdev = adapter->netdev;
1197 if (adapter->tx_scrq) {
1198 for (i = 0; i < adapter->req_tx_queues; i++)
1199 if (adapter->tx_scrq[i]->irq) {
1201 "Disabling tx_scrq[%d] irq\n", i);
1202 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1203 disable_irq(adapter->tx_scrq[i]->irq);
1207 if (adapter->rx_scrq) {
1208 for (i = 0; i < adapter->req_rx_queues; i++) {
1209 if (adapter->rx_scrq[i]->irq) {
1211 "Disabling rx_scrq[%d] irq\n", i);
1212 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1213 disable_irq(adapter->rx_scrq[i]->irq);
1219 static void ibmvnic_cleanup(struct net_device *netdev)
1221 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1223 /* ensure that transmissions are stopped if called by do_reset */
1224 if (adapter->resetting)
1225 netif_tx_disable(netdev);
1227 netif_tx_stop_all_queues(netdev);
1229 ibmvnic_napi_disable(adapter);
1230 ibmvnic_disable_irqs(adapter);
1232 clean_rx_pools(adapter);
1233 clean_tx_pools(adapter);
1236 static int __ibmvnic_close(struct net_device *netdev)
1238 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1241 adapter->state = VNIC_CLOSING;
1242 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1245 adapter->state = VNIC_CLOSED;
1249 static int ibmvnic_close(struct net_device *netdev)
1251 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1254 /* If device failover is pending, just set device state and return.
1255 * Device operation will be handled by reset routine.
1257 if (adapter->failover_pending) {
1258 adapter->state = VNIC_CLOSED;
1262 rc = __ibmvnic_close(netdev);
1263 ibmvnic_cleanup(netdev);
1269 * build_hdr_data - creates L2/L3/L4 header data buffer
1270 * @hdr_field - bitfield determining needed headers
1271 * @skb - socket buffer
1272 * @hdr_len - array of header lengths
1273 * @tot_len - total length of data
1275 * Reads hdr_field to determine which headers are needed by firmware.
1276 * Builds a buffer containing these headers. Saves individual header
1277 * lengths and total buffer length to be used to build descriptors.
1279 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1280 int *hdr_len, u8 *hdr_data)
1285 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1286 hdr_len[0] = sizeof(struct vlan_ethhdr);
1288 hdr_len[0] = sizeof(struct ethhdr);
1290 if (skb->protocol == htons(ETH_P_IP)) {
1291 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1292 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1293 hdr_len[2] = tcp_hdrlen(skb);
1294 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1295 hdr_len[2] = sizeof(struct udphdr);
1296 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1297 hdr_len[1] = sizeof(struct ipv6hdr);
1298 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1299 hdr_len[2] = tcp_hdrlen(skb);
1300 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1301 hdr_len[2] = sizeof(struct udphdr);
1302 } else if (skb->protocol == htons(ETH_P_ARP)) {
1303 hdr_len[1] = arp_hdr_len(skb->dev);
1307 memset(hdr_data, 0, 120);
1308 if ((hdr_field >> 6) & 1) {
1309 hdr = skb_mac_header(skb);
1310 memcpy(hdr_data, hdr, hdr_len[0]);
1314 if ((hdr_field >> 5) & 1) {
1315 hdr = skb_network_header(skb);
1316 memcpy(hdr_data + len, hdr, hdr_len[1]);
1320 if ((hdr_field >> 4) & 1) {
1321 hdr = skb_transport_header(skb);
1322 memcpy(hdr_data + len, hdr, hdr_len[2]);
1329 * create_hdr_descs - create header and header extension descriptors
1330 * @hdr_field - bitfield determining needed headers
1331 * @data - buffer containing header data
1332 * @len - length of data buffer
1333 * @hdr_len - array of individual header lengths
1334 * @scrq_arr - descriptor array
1336 * Creates header and, if needed, header extension descriptors and
1337 * places them in a descriptor array, scrq_arr
1340 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1341 union sub_crq *scrq_arr)
1343 union sub_crq hdr_desc;
1349 while (tmp_len > 0) {
1350 cur = hdr_data + len - tmp_len;
1352 memset(&hdr_desc, 0, sizeof(hdr_desc));
1353 if (cur != hdr_data) {
1354 data = hdr_desc.hdr_ext.data;
1355 tmp = tmp_len > 29 ? 29 : tmp_len;
1356 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1357 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1358 hdr_desc.hdr_ext.len = tmp;
1360 data = hdr_desc.hdr.data;
1361 tmp = tmp_len > 24 ? 24 : tmp_len;
1362 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1363 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1364 hdr_desc.hdr.len = tmp;
1365 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1366 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1367 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1368 hdr_desc.hdr.flag = hdr_field << 1;
1370 memcpy(data, cur, tmp);
1372 *scrq_arr = hdr_desc;
1381 * build_hdr_descs_arr - build a header descriptor array
1382 * @skb - socket buffer
1383 * @num_entries - number of descriptors to be sent
1384 * @subcrq - first TX descriptor
1385 * @hdr_field - bit field determining which headers will be sent
1387 * This function will build a TX descriptor array with applicable
1388 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1391 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1392 int *num_entries, u8 hdr_field)
1394 int hdr_len[3] = {0, 0, 0};
1396 u8 *hdr_data = txbuff->hdr_data;
1398 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1400 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1401 txbuff->indir_arr + 1);
1404 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1405 struct net_device *netdev)
1407 /* For some backing devices, mishandling of small packets
1408 * can result in a loss of connection or TX stall. Device
1409 * architects recommend that no packet should be smaller
1410 * than the minimum MTU value provided to the driver, so
1411 * pad any packets to that length
1413 if (skb->len < netdev->min_mtu)
1414 return skb_put_padto(skb, netdev->min_mtu);
1419 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1421 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1422 int queue_num = skb_get_queue_mapping(skb);
1423 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1424 struct device *dev = &adapter->vdev->dev;
1425 struct ibmvnic_tx_buff *tx_buff = NULL;
1426 struct ibmvnic_sub_crq_queue *tx_scrq;
1427 struct ibmvnic_tx_pool *tx_pool;
1428 unsigned int tx_send_failed = 0;
1429 unsigned int tx_map_failed = 0;
1430 unsigned int tx_dropped = 0;
1431 unsigned int tx_packets = 0;
1432 unsigned int tx_bytes = 0;
1433 dma_addr_t data_dma_addr;
1434 struct netdev_queue *txq;
1435 unsigned long lpar_rc;
1436 union sub_crq tx_crq;
1437 unsigned int offset;
1438 int num_entries = 1;
1443 netdev_tx_t ret = NETDEV_TX_OK;
1445 if (adapter->resetting) {
1446 if (!netif_subqueue_stopped(netdev, skb))
1447 netif_stop_subqueue(netdev, queue_num);
1448 dev_kfree_skb_any(skb);
1456 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1462 if (skb_is_gso(skb))
1463 tx_pool = &adapter->tso_pool[queue_num];
1465 tx_pool = &adapter->tx_pool[queue_num];
1467 tx_scrq = adapter->tx_scrq[queue_num];
1468 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1469 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1470 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1472 index = tx_pool->free_map[tx_pool->consumer_index];
1474 if (index == IBMVNIC_INVALID_MAP) {
1475 dev_kfree_skb_any(skb);
1482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1484 offset = index * tx_pool->buf_size;
1485 dst = tx_pool->long_term_buff.buff + offset;
1486 memset(dst, 0, tx_pool->buf_size);
1487 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1489 if (skb_shinfo(skb)->nr_frags) {
1493 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1494 cur = skb_headlen(skb);
1496 /* Copy the frags */
1497 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1498 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1501 page_address(skb_frag_page(frag)) +
1502 frag->page_offset, skb_frag_size(frag));
1503 cur += skb_frag_size(frag);
1506 skb_copy_from_linear_data(skb, dst, skb->len);
1509 tx_pool->consumer_index =
1510 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1512 tx_buff = &tx_pool->tx_buff[index];
1514 tx_buff->data_dma[0] = data_dma_addr;
1515 tx_buff->data_len[0] = skb->len;
1516 tx_buff->index = index;
1517 tx_buff->pool_index = queue_num;
1518 tx_buff->last_frag = true;
1520 memset(&tx_crq, 0, sizeof(tx_crq));
1521 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1522 tx_crq.v1.type = IBMVNIC_TX_DESC;
1523 tx_crq.v1.n_crq_elem = 1;
1524 tx_crq.v1.n_sge = 1;
1525 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1527 if (skb_is_gso(skb))
1528 tx_crq.v1.correlator =
1529 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1531 tx_crq.v1.correlator = cpu_to_be32(index);
1532 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1533 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1534 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1536 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1537 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1538 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1541 if (skb->protocol == htons(ETH_P_IP)) {
1542 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1543 proto = ip_hdr(skb)->protocol;
1544 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1546 proto = ipv6_hdr(skb)->nexthdr;
1549 if (proto == IPPROTO_TCP)
1550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1551 else if (proto == IPPROTO_UDP)
1552 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1554 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1555 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1558 if (skb_is_gso(skb)) {
1559 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1560 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1563 /* determine if l2/3/4 headers are sent to firmware */
1564 if ((*hdrs >> 7) & 1) {
1565 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1566 tx_crq.v1.n_crq_elem = num_entries;
1567 tx_buff->num_entries = num_entries;
1568 tx_buff->indir_arr[0] = tx_crq;
1569 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1570 sizeof(tx_buff->indir_arr),
1572 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1573 dev_kfree_skb_any(skb);
1574 tx_buff->skb = NULL;
1575 if (!firmware_has_feature(FW_FEATURE_CMO))
1576 dev_err(dev, "tx: unable to map descriptor array\n");
1582 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1583 (u64)tx_buff->indir_dma,
1586 tx_buff->num_entries = num_entries;
1587 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1590 if (lpar_rc != H_SUCCESS) {
1591 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1592 dev_err_ratelimited(dev, "tx: send failed\n");
1593 dev_kfree_skb_any(skb);
1594 tx_buff->skb = NULL;
1596 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1597 /* Disable TX and report carrier off if queue is closed
1598 * or pending failover.
1599 * Firmware guarantees that a signal will be sent to the
1600 * driver, triggering a reset or some other action.
1602 netif_tx_stop_all_queues(netdev);
1603 netif_carrier_off(netdev);
1612 if (atomic_add_return(num_entries, &tx_scrq->used)
1613 >= adapter->req_tx_entries_per_subcrq) {
1614 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1615 netif_stop_subqueue(netdev, queue_num);
1619 tx_bytes += skb->len;
1620 txq->trans_start = jiffies;
1625 /* roll back consumer index and map array*/
1626 if (tx_pool->consumer_index == 0)
1627 tx_pool->consumer_index =
1628 tx_pool->num_buffers - 1;
1630 tx_pool->consumer_index--;
1631 tx_pool->free_map[tx_pool->consumer_index] = index;
1633 netdev->stats.tx_dropped += tx_dropped;
1634 netdev->stats.tx_bytes += tx_bytes;
1635 netdev->stats.tx_packets += tx_packets;
1636 adapter->tx_send_failed += tx_send_failed;
1637 adapter->tx_map_failed += tx_map_failed;
1638 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1639 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1640 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1645 static void ibmvnic_set_multi(struct net_device *netdev)
1647 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1648 struct netdev_hw_addr *ha;
1649 union ibmvnic_crq crq;
1651 memset(&crq, 0, sizeof(crq));
1652 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1653 crq.request_capability.cmd = REQUEST_CAPABILITY;
1655 if (netdev->flags & IFF_PROMISC) {
1656 if (!adapter->promisc_supported)
1659 if (netdev->flags & IFF_ALLMULTI) {
1660 /* Accept all multicast */
1661 memset(&crq, 0, sizeof(crq));
1662 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1663 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1664 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1665 ibmvnic_send_crq(adapter, &crq);
1666 } else if (netdev_mc_empty(netdev)) {
1667 /* Reject all multicast */
1668 memset(&crq, 0, sizeof(crq));
1669 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1670 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1671 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1672 ibmvnic_send_crq(adapter, &crq);
1674 /* Accept one or more multicast(s) */
1675 netdev_for_each_mc_addr(ha, netdev) {
1676 memset(&crq, 0, sizeof(crq));
1677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1678 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1679 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1680 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1682 ibmvnic_send_crq(adapter, &crq);
1688 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1690 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1691 struct sockaddr *addr = p;
1692 union ibmvnic_crq crq;
1695 if (!is_valid_ether_addr(addr->sa_data))
1696 return -EADDRNOTAVAIL;
1698 memset(&crq, 0, sizeof(crq));
1699 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1700 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1701 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1703 init_completion(&adapter->fw_done);
1704 rc = ibmvnic_send_crq(adapter, &crq);
1707 wait_for_completion(&adapter->fw_done);
1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1709 return adapter->fw_done_rc ? -EIO : 0;
1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1715 struct sockaddr *addr = p;
1718 if (adapter->state == VNIC_PROBED) {
1719 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1720 adapter->mac_change_pending = true;
1724 rc = __ibmvnic_set_mac(netdev, addr);
1730 * do_reset returns zero if we are able to keep processing reset events, or
1731 * non-zero if we hit a fatal error and must halt.
1733 static int do_reset(struct ibmvnic_adapter *adapter,
1734 struct ibmvnic_rwi *rwi, u32 reset_state)
1736 u64 old_num_rx_queues, old_num_tx_queues;
1737 u64 old_num_rx_slots, old_num_tx_slots;
1738 struct net_device *netdev = adapter->netdev;
1741 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1744 netif_carrier_off(netdev);
1745 adapter->reset_reason = rwi->reset_reason;
1747 old_num_rx_queues = adapter->req_rx_queues;
1748 old_num_tx_queues = adapter->req_tx_queues;
1749 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1750 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1752 ibmvnic_cleanup(netdev);
1754 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1755 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1756 rc = __ibmvnic_close(netdev);
1761 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1762 adapter->wait_for_reset) {
1763 release_resources(adapter);
1764 release_sub_crqs(adapter, 1);
1765 release_crq_queue(adapter);
1768 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1769 /* remove the closed state so when we call open it appears
1770 * we are coming from the probed state.
1772 adapter->state = VNIC_PROBED;
1774 if (adapter->wait_for_reset) {
1775 rc = init_crq_queue(adapter);
1776 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1777 rc = ibmvnic_reenable_crq_queue(adapter);
1778 release_sub_crqs(adapter, 1);
1780 rc = ibmvnic_reset_crq(adapter);
1782 rc = vio_enable_interrupts(adapter->vdev);
1786 netdev_err(adapter->netdev,
1787 "Couldn't initialize crq. rc=%d\n", rc);
1791 rc = ibmvnic_reset_init(adapter);
1793 return IBMVNIC_INIT_FAILED;
1795 /* If the adapter was in PROBE state prior to the reset,
1798 if (reset_state == VNIC_PROBED)
1801 rc = ibmvnic_login(netdev);
1803 adapter->state = reset_state;
1807 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1808 adapter->wait_for_reset) {
1809 rc = init_resources(adapter);
1812 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1813 adapter->req_tx_queues != old_num_tx_queues ||
1814 adapter->req_rx_add_entries_per_subcrq !=
1816 adapter->req_tx_entries_per_subcrq !=
1818 release_rx_pools(adapter);
1819 release_tx_pools(adapter);
1820 release_napi(adapter);
1821 release_vpd_data(adapter);
1823 rc = init_resources(adapter);
1828 rc = reset_tx_pools(adapter);
1832 rc = reset_rx_pools(adapter);
1836 ibmvnic_disable_irqs(adapter);
1838 adapter->state = VNIC_CLOSED;
1840 if (reset_state == VNIC_CLOSED)
1843 rc = __ibmvnic_open(netdev);
1845 if (list_empty(&adapter->rwi_list))
1846 adapter->state = VNIC_CLOSED;
1848 adapter->state = reset_state;
1854 for (i = 0; i < adapter->req_rx_queues; i++)
1855 napi_schedule(&adapter->napi[i]);
1857 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1858 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1859 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1861 netif_carrier_on(netdev);
1866 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1867 struct ibmvnic_rwi *rwi, u32 reset_state)
1869 struct net_device *netdev = adapter->netdev;
1872 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1875 netif_carrier_off(netdev);
1876 adapter->reset_reason = rwi->reset_reason;
1878 ibmvnic_cleanup(netdev);
1879 release_resources(adapter);
1880 release_sub_crqs(adapter, 0);
1881 release_crq_queue(adapter);
1883 /* remove the closed state so when we call open it appears
1884 * we are coming from the probed state.
1886 adapter->state = VNIC_PROBED;
1888 rc = init_crq_queue(adapter);
1890 netdev_err(adapter->netdev,
1891 "Couldn't initialize crq. rc=%d\n", rc);
1895 rc = ibmvnic_init(adapter);
1899 /* If the adapter was in PROBE state prior to the reset,
1902 if (reset_state == VNIC_PROBED)
1905 rc = ibmvnic_login(netdev);
1907 adapter->state = VNIC_PROBED;
1911 rc = init_resources(adapter);
1915 ibmvnic_disable_irqs(adapter);
1916 adapter->state = VNIC_CLOSED;
1918 if (reset_state == VNIC_CLOSED)
1921 rc = __ibmvnic_open(netdev);
1923 if (list_empty(&adapter->rwi_list))
1924 adapter->state = VNIC_CLOSED;
1926 adapter->state = reset_state;
1931 netif_carrier_on(netdev);
1936 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1938 struct ibmvnic_rwi *rwi;
1939 unsigned long flags;
1941 spin_lock_irqsave(&adapter->rwi_lock, flags);
1943 if (!list_empty(&adapter->rwi_list)) {
1944 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1946 list_del(&rwi->list);
1951 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1955 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1957 struct ibmvnic_rwi *rwi;
1959 rwi = get_next_rwi(adapter);
1962 rwi = get_next_rwi(adapter);
1966 static void __ibmvnic_reset(struct work_struct *work)
1968 struct ibmvnic_rwi *rwi;
1969 struct ibmvnic_adapter *adapter;
1970 struct net_device *netdev;
1971 bool we_lock_rtnl = false;
1975 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1976 netdev = adapter->netdev;
1978 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1979 * unless wait_for_reset is set, in which case the rtnl lock
1980 * has already been taken before initializing the reset
1982 if (!adapter->wait_for_reset) {
1984 we_lock_rtnl = true;
1986 reset_state = adapter->state;
1988 rwi = get_next_rwi(adapter);
1990 if (adapter->force_reset_recovery) {
1991 adapter->force_reset_recovery = false;
1992 rc = do_hard_reset(adapter, rwi, reset_state);
1994 rc = do_reset(adapter, rwi, reset_state);
1997 if (rc && rc != IBMVNIC_INIT_FAILED &&
1998 !adapter->force_reset_recovery)
2001 rwi = get_next_rwi(adapter);
2004 if (adapter->wait_for_reset) {
2005 adapter->wait_for_reset = false;
2006 adapter->reset_done_rc = rc;
2007 complete(&adapter->reset_done);
2011 netdev_dbg(adapter->netdev, "Reset failed\n");
2012 free_all_rwi(adapter);
2015 adapter->resetting = false;
2020 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2021 enum ibmvnic_reset_reason reason)
2023 struct list_head *entry, *tmp_entry;
2024 struct ibmvnic_rwi *rwi, *tmp;
2025 struct net_device *netdev = adapter->netdev;
2026 unsigned long flags;
2029 if (adapter->state == VNIC_REMOVING ||
2030 adapter->state == VNIC_REMOVED ||
2031 adapter->failover_pending) {
2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2037 if (adapter->state == VNIC_PROBING) {
2038 netdev_warn(netdev, "Adapter reset during probe\n");
2039 ret = adapter->init_done_rc = EAGAIN;
2043 spin_lock_irqsave(&adapter->rwi_lock, flags);
2045 list_for_each(entry, &adapter->rwi_list) {
2046 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2047 if (tmp->reset_reason == reason) {
2048 netdev_dbg(netdev, "Skipping matching reset\n");
2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2058 ibmvnic_close(netdev);
2062 /* if we just received a transport event,
2063 * flush reset queue and process this reset
2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2069 rwi->reset_reason = reason;
2070 list_add_tail(&rwi->list, &adapter->rwi_list);
2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2072 adapter->resetting = true;
2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2074 schedule_work(&adapter->ibmvnic_reset);
2078 if (adapter->wait_for_reset)
2079 adapter->wait_for_reset = false;
2083 static void ibmvnic_tx_timeout(struct net_device *dev)
2085 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2090 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2091 struct ibmvnic_rx_buff *rx_buff)
2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2095 rx_buff->skb = NULL;
2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2100 atomic_dec(&pool->available);
2103 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2105 struct net_device *netdev = napi->dev;
2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2107 int scrq_num = (int)(napi - adapter->napi);
2108 int frames_processed = 0;
2111 while (frames_processed < budget) {
2112 struct sk_buff *skb;
2113 struct ibmvnic_rx_buff *rx_buff;
2114 union sub_crq *next;
2119 if (unlikely(adapter->resetting &&
2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2122 napi_complete_done(napi, frames_processed);
2123 return frames_processed;
2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2131 rx_comp.correlator);
2132 /* do error checking */
2133 if (next->rx_comp.rc) {
2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2135 be16_to_cpu(next->rx_comp.rc));
2136 /* free the entry */
2137 next->rx_comp.first = 0;
2138 dev_kfree_skb_any(rx_buff->skb);
2139 remove_buff_from_pool(adapter, rx_buff);
2141 } else if (!rx_buff->skb) {
2142 /* free the entry */
2143 next->rx_comp.first = 0;
2144 remove_buff_from_pool(adapter, rx_buff);
2148 length = be32_to_cpu(next->rx_comp.len);
2149 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2150 flags = next->rx_comp.flags;
2152 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2155 /* VLAN Header has been stripped by the system firmware and
2156 * needs to be inserted by the driver
2158 if (adapter->rx_vlan_header_insertion &&
2159 (flags & IBMVNIC_VLAN_STRIPPED))
2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2161 ntohs(next->rx_comp.vlan_tci));
2163 /* free the entry */
2164 next->rx_comp.first = 0;
2165 remove_buff_from_pool(adapter, rx_buff);
2167 skb_put(skb, length);
2168 skb->protocol = eth_type_trans(skb, netdev);
2169 skb_record_rx_queue(skb, scrq_num);
2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2173 skb->ip_summed = CHECKSUM_UNNECESSARY;
2177 napi_gro_receive(napi, skb); /* send it up */
2178 netdev->stats.rx_packets++;
2179 netdev->stats.rx_bytes += length;
2180 adapter->rx_stats_buffers[scrq_num].packets++;
2181 adapter->rx_stats_buffers[scrq_num].bytes += length;
2185 if (adapter->state != VNIC_CLOSING)
2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2188 if (frames_processed < budget) {
2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2190 napi_complete_done(napi, frames_processed);
2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2192 napi_reschedule(napi)) {
2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2197 return frames_processed;
2200 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2204 adapter->fallback.mtu = adapter->req_mtu;
2205 adapter->fallback.rx_queues = adapter->req_rx_queues;
2206 adapter->fallback.tx_queues = adapter->req_tx_queues;
2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2210 init_completion(&adapter->reset_done);
2211 adapter->wait_for_reset = true;
2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2215 wait_for_completion(&adapter->reset_done);
2218 if (adapter->reset_done_rc) {
2220 adapter->desired.mtu = adapter->fallback.mtu;
2221 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2222 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2223 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2224 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2226 init_completion(&adapter->reset_done);
2227 adapter->wait_for_reset = true;
2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2231 wait_for_completion(&adapter->reset_done);
2233 adapter->wait_for_reset = false;
2238 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2242 adapter->desired.mtu = new_mtu + ETH_HLEN;
2244 return wait_for_reset(adapter);
2247 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2248 struct net_device *dev,
2249 netdev_features_t features)
2251 /* Some backing hardware adapters can not
2252 * handle packets with a MSS less than 224
2253 * or with only one segment.
2255 if (skb_is_gso(skb)) {
2256 if (skb_shinfo(skb)->gso_size < 224 ||
2257 skb_shinfo(skb)->gso_segs == 1)
2258 features &= ~NETIF_F_GSO_MASK;
2264 static const struct net_device_ops ibmvnic_netdev_ops = {
2265 .ndo_open = ibmvnic_open,
2266 .ndo_stop = ibmvnic_close,
2267 .ndo_start_xmit = ibmvnic_xmit,
2268 .ndo_set_rx_mode = ibmvnic_set_multi,
2269 .ndo_set_mac_address = ibmvnic_set_mac,
2270 .ndo_validate_addr = eth_validate_addr,
2271 .ndo_tx_timeout = ibmvnic_tx_timeout,
2272 .ndo_change_mtu = ibmvnic_change_mtu,
2273 .ndo_features_check = ibmvnic_features_check,
2276 /* ethtool functions */
2278 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2279 struct ethtool_link_ksettings *cmd)
2281 u32 supported, advertising;
2283 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2285 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2287 cmd->base.speed = SPEED_1000;
2288 cmd->base.duplex = DUPLEX_FULL;
2289 cmd->base.port = PORT_FIBRE;
2290 cmd->base.phy_address = 0;
2291 cmd->base.autoneg = AUTONEG_ENABLE;
2293 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2295 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2301 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2302 struct ethtool_drvinfo *info)
2304 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2306 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2307 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2308 strlcpy(info->fw_version, adapter->fw_version,
2309 sizeof(info->fw_version));
2312 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2314 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2316 return adapter->msg_enable;
2319 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2321 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2323 adapter->msg_enable = data;
2326 static u32 ibmvnic_get_link(struct net_device *netdev)
2328 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2330 /* Don't need to send a query because we request a logical link up at
2331 * init and then we wait for link state indications
2333 return adapter->logical_link_state;
2336 static void ibmvnic_get_ringparam(struct net_device *netdev,
2337 struct ethtool_ringparam *ring)
2339 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2341 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2342 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2343 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2345 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2346 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2348 ring->rx_mini_max_pending = 0;
2349 ring->rx_jumbo_max_pending = 0;
2350 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2351 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2352 ring->rx_mini_pending = 0;
2353 ring->rx_jumbo_pending = 0;
2356 static int ibmvnic_set_ringparam(struct net_device *netdev,
2357 struct ethtool_ringparam *ring)
2359 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2363 adapter->desired.rx_entries = ring->rx_pending;
2364 adapter->desired.tx_entries = ring->tx_pending;
2366 ret = wait_for_reset(adapter);
2369 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2370 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2372 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2373 ring->rx_pending, ring->tx_pending,
2374 adapter->req_rx_add_entries_per_subcrq,
2375 adapter->req_tx_entries_per_subcrq);
2379 static void ibmvnic_get_channels(struct net_device *netdev,
2380 struct ethtool_channels *channels)
2382 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2384 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2385 channels->max_rx = adapter->max_rx_queues;
2386 channels->max_tx = adapter->max_tx_queues;
2388 channels->max_rx = IBMVNIC_MAX_QUEUES;
2389 channels->max_tx = IBMVNIC_MAX_QUEUES;
2392 channels->max_other = 0;
2393 channels->max_combined = 0;
2394 channels->rx_count = adapter->req_rx_queues;
2395 channels->tx_count = adapter->req_tx_queues;
2396 channels->other_count = 0;
2397 channels->combined_count = 0;
2400 static int ibmvnic_set_channels(struct net_device *netdev,
2401 struct ethtool_channels *channels)
2403 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2407 adapter->desired.rx_queues = channels->rx_count;
2408 adapter->desired.tx_queues = channels->tx_count;
2410 ret = wait_for_reset(adapter);
2413 (adapter->req_rx_queues != channels->rx_count ||
2414 adapter->req_tx_queues != channels->tx_count))
2416 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2417 channels->rx_count, channels->tx_count,
2418 adapter->req_rx_queues, adapter->req_tx_queues);
2423 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2425 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2428 switch (stringset) {
2430 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2431 i++, data += ETH_GSTRING_LEN)
2432 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2434 for (i = 0; i < adapter->req_tx_queues; i++) {
2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2436 data += ETH_GSTRING_LEN;
2438 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2439 data += ETH_GSTRING_LEN;
2441 snprintf(data, ETH_GSTRING_LEN,
2442 "tx%d_dropped_packets", i);
2443 data += ETH_GSTRING_LEN;
2446 for (i = 0; i < adapter->req_rx_queues; i++) {
2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2448 data += ETH_GSTRING_LEN;
2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2451 data += ETH_GSTRING_LEN;
2453 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2454 data += ETH_GSTRING_LEN;
2458 case ETH_SS_PRIV_FLAGS:
2459 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2460 strcpy(data + i * ETH_GSTRING_LEN,
2461 ibmvnic_priv_flags[i]);
2468 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2470 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2474 return ARRAY_SIZE(ibmvnic_stats) +
2475 adapter->req_tx_queues * NUM_TX_STATS +
2476 adapter->req_rx_queues * NUM_RX_STATS;
2477 case ETH_SS_PRIV_FLAGS:
2478 return ARRAY_SIZE(ibmvnic_priv_flags);
2484 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2485 struct ethtool_stats *stats, u64 *data)
2487 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2488 union ibmvnic_crq crq;
2492 memset(&crq, 0, sizeof(crq));
2493 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2494 crq.request_statistics.cmd = REQUEST_STATISTICS;
2495 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2496 crq.request_statistics.len =
2497 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2499 /* Wait for data to be written */
2500 init_completion(&adapter->stats_done);
2501 rc = ibmvnic_send_crq(adapter, &crq);
2504 wait_for_completion(&adapter->stats_done);
2506 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2507 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2508 ibmvnic_stats[i].offset));
2510 for (j = 0; j < adapter->req_tx_queues; j++) {
2511 data[i] = adapter->tx_stats_buffers[j].packets;
2513 data[i] = adapter->tx_stats_buffers[j].bytes;
2515 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2519 for (j = 0; j < adapter->req_rx_queues; j++) {
2520 data[i] = adapter->rx_stats_buffers[j].packets;
2522 data[i] = adapter->rx_stats_buffers[j].bytes;
2524 data[i] = adapter->rx_stats_buffers[j].interrupts;
2529 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2531 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2533 return adapter->priv_flags;
2536 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2538 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2539 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2542 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2544 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2548 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2549 .get_drvinfo = ibmvnic_get_drvinfo,
2550 .get_msglevel = ibmvnic_get_msglevel,
2551 .set_msglevel = ibmvnic_set_msglevel,
2552 .get_link = ibmvnic_get_link,
2553 .get_ringparam = ibmvnic_get_ringparam,
2554 .set_ringparam = ibmvnic_set_ringparam,
2555 .get_channels = ibmvnic_get_channels,
2556 .set_channels = ibmvnic_set_channels,
2557 .get_strings = ibmvnic_get_strings,
2558 .get_sset_count = ibmvnic_get_sset_count,
2559 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2560 .get_link_ksettings = ibmvnic_get_link_ksettings,
2561 .get_priv_flags = ibmvnic_get_priv_flags,
2562 .set_priv_flags = ibmvnic_set_priv_flags,
2565 /* Routines for managing CRQs/sCRQs */
2567 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2568 struct ibmvnic_sub_crq_queue *scrq)
2573 free_irq(scrq->irq, scrq);
2574 irq_dispose_mapping(scrq->irq);
2578 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2579 atomic_set(&scrq->used, 0);
2582 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2583 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2587 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2591 for (i = 0; i < adapter->req_tx_queues; i++) {
2592 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2593 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2598 for (i = 0; i < adapter->req_rx_queues; i++) {
2599 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2600 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2608 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2609 struct ibmvnic_sub_crq_queue *scrq,
2612 struct device *dev = &adapter->vdev->dev;
2615 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2618 /* Close the sub-crqs */
2620 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2621 adapter->vdev->unit_address,
2623 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2626 netdev_err(adapter->netdev,
2627 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2632 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2634 free_pages((unsigned long)scrq->msgs, 2);
2638 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2641 struct device *dev = &adapter->vdev->dev;
2642 struct ibmvnic_sub_crq_queue *scrq;
2645 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2650 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2652 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2653 goto zero_page_failed;
2656 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2658 if (dma_mapping_error(dev, scrq->msg_token)) {
2659 dev_warn(dev, "Couldn't map crq queue messages page\n");
2663 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2664 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2666 if (rc == H_RESOURCE)
2667 rc = ibmvnic_reset_crq(adapter);
2669 if (rc == H_CLOSED) {
2670 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2672 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2676 scrq->adapter = adapter;
2677 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2678 spin_lock_init(&scrq->lock);
2680 netdev_dbg(adapter->netdev,
2681 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2682 scrq->crq_num, scrq->hw_irq, scrq->irq);
2687 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2690 free_pages((unsigned long)scrq->msgs, 2);
2697 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2701 if (adapter->tx_scrq) {
2702 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2703 if (!adapter->tx_scrq[i])
2706 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2708 if (adapter->tx_scrq[i]->irq) {
2709 free_irq(adapter->tx_scrq[i]->irq,
2710 adapter->tx_scrq[i]);
2711 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2712 adapter->tx_scrq[i]->irq = 0;
2715 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2719 kfree(adapter->tx_scrq);
2720 adapter->tx_scrq = NULL;
2721 adapter->num_active_tx_scrqs = 0;
2724 if (adapter->rx_scrq) {
2725 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2726 if (!adapter->rx_scrq[i])
2729 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2731 if (adapter->rx_scrq[i]->irq) {
2732 free_irq(adapter->rx_scrq[i]->irq,
2733 adapter->rx_scrq[i]);
2734 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2735 adapter->rx_scrq[i]->irq = 0;
2738 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2742 kfree(adapter->rx_scrq);
2743 adapter->rx_scrq = NULL;
2744 adapter->num_active_rx_scrqs = 0;
2748 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2749 struct ibmvnic_sub_crq_queue *scrq)
2751 struct device *dev = &adapter->vdev->dev;
2754 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2755 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2757 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2762 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2763 struct ibmvnic_sub_crq_queue *scrq)
2765 struct device *dev = &adapter->vdev->dev;
2768 if (scrq->hw_irq > 0x100000000ULL) {
2769 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2773 if (adapter->resetting &&
2774 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2775 u64 val = (0xff000000) | scrq->hw_irq;
2777 rc = plpar_hcall_norets(H_EOI, val);
2779 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2783 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2784 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2786 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2791 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2792 struct ibmvnic_sub_crq_queue *scrq)
2794 struct device *dev = &adapter->vdev->dev;
2795 struct ibmvnic_tx_pool *tx_pool;
2796 struct ibmvnic_tx_buff *txbuff;
2797 union sub_crq *next;
2803 while (pending_scrq(adapter, scrq)) {
2804 unsigned int pool = scrq->pool_index;
2805 int num_entries = 0;
2807 next = ibmvnic_next_scrq(adapter, scrq);
2808 for (i = 0; i < next->tx_comp.num_comps; i++) {
2809 if (next->tx_comp.rcs[i]) {
2810 dev_err(dev, "tx error %x\n",
2811 next->tx_comp.rcs[i]);
2814 index = be32_to_cpu(next->tx_comp.correlators[i]);
2815 if (index & IBMVNIC_TSO_POOL_MASK) {
2816 tx_pool = &adapter->tso_pool[pool];
2817 index &= ~IBMVNIC_TSO_POOL_MASK;
2819 tx_pool = &adapter->tx_pool[pool];
2822 txbuff = &tx_pool->tx_buff[index];
2824 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2825 if (!txbuff->data_dma[j])
2828 txbuff->data_dma[j] = 0;
2830 /* if sub_crq was sent indirectly */
2831 first = &txbuff->indir_arr[0].generic.first;
2832 if (*first == IBMVNIC_CRQ_CMD) {
2833 dma_unmap_single(dev, txbuff->indir_dma,
2834 sizeof(txbuff->indir_arr),
2839 if (txbuff->last_frag) {
2840 dev_kfree_skb_any(txbuff->skb);
2844 num_entries += txbuff->num_entries;
2846 tx_pool->free_map[tx_pool->producer_index] = index;
2847 tx_pool->producer_index =
2848 (tx_pool->producer_index + 1) %
2849 tx_pool->num_buffers;
2851 /* remove tx_comp scrq*/
2852 next->tx_comp.first = 0;
2854 if (atomic_sub_return(num_entries, &scrq->used) <=
2855 (adapter->req_tx_entries_per_subcrq / 2) &&
2856 __netif_subqueue_stopped(adapter->netdev,
2857 scrq->pool_index)) {
2858 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2859 netdev_dbg(adapter->netdev, "Started queue %d\n",
2864 enable_scrq_irq(adapter, scrq);
2866 if (pending_scrq(adapter, scrq)) {
2867 disable_scrq_irq(adapter, scrq);
2874 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2876 struct ibmvnic_sub_crq_queue *scrq = instance;
2877 struct ibmvnic_adapter *adapter = scrq->adapter;
2879 disable_scrq_irq(adapter, scrq);
2880 ibmvnic_complete_tx(adapter, scrq);
2885 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2887 struct ibmvnic_sub_crq_queue *scrq = instance;
2888 struct ibmvnic_adapter *adapter = scrq->adapter;
2890 /* When booting a kdump kernel we can hit pending interrupts
2891 * prior to completing driver initialization.
2893 if (unlikely(adapter->state != VNIC_OPEN))
2896 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2898 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2899 disable_scrq_irq(adapter, scrq);
2900 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2906 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2908 struct device *dev = &adapter->vdev->dev;
2909 struct ibmvnic_sub_crq_queue *scrq;
2913 for (i = 0; i < adapter->req_tx_queues; i++) {
2914 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2916 scrq = adapter->tx_scrq[i];
2917 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2921 dev_err(dev, "Error mapping irq\n");
2922 goto req_tx_irq_failed;
2925 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2926 0, "ibmvnic_tx", scrq);
2929 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2931 irq_dispose_mapping(scrq->irq);
2932 goto req_tx_irq_failed;
2936 for (i = 0; i < adapter->req_rx_queues; i++) {
2937 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2939 scrq = adapter->rx_scrq[i];
2940 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2943 dev_err(dev, "Error mapping irq\n");
2944 goto req_rx_irq_failed;
2946 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2947 0, "ibmvnic_rx", scrq);
2949 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2951 irq_dispose_mapping(scrq->irq);
2952 goto req_rx_irq_failed;
2958 for (j = 0; j < i; j++) {
2959 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2960 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2962 i = adapter->req_tx_queues;
2964 for (j = 0; j < i; j++) {
2965 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2966 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2968 release_sub_crqs(adapter, 1);
2972 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2974 struct device *dev = &adapter->vdev->dev;
2975 struct ibmvnic_sub_crq_queue **allqueues;
2976 int registered_queues = 0;
2981 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2983 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2987 for (i = 0; i < total_queues; i++) {
2988 allqueues[i] = init_sub_crq_queue(adapter);
2989 if (!allqueues[i]) {
2990 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2993 registered_queues++;
2996 /* Make sure we were able to register the minimum number of queues */
2997 if (registered_queues <
2998 adapter->min_tx_queues + adapter->min_rx_queues) {
2999 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3003 /* Distribute the failed allocated queues*/
3004 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3005 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3008 if (adapter->req_rx_queues > adapter->min_rx_queues)
3009 adapter->req_rx_queues--;
3014 if (adapter->req_tx_queues > adapter->min_tx_queues)
3015 adapter->req_tx_queues--;
3022 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3023 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3024 if (!adapter->tx_scrq)
3027 for (i = 0; i < adapter->req_tx_queues; i++) {
3028 adapter->tx_scrq[i] = allqueues[i];
3029 adapter->tx_scrq[i]->pool_index = i;
3030 adapter->num_active_tx_scrqs++;
3033 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3034 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3035 if (!adapter->rx_scrq)
3038 for (i = 0; i < adapter->req_rx_queues; i++) {
3039 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3040 adapter->rx_scrq[i]->scrq_num = i;
3041 adapter->num_active_rx_scrqs++;
3048 kfree(adapter->tx_scrq);
3049 adapter->tx_scrq = NULL;
3051 for (i = 0; i < registered_queues; i++)
3052 release_sub_crq_queue(adapter, allqueues[i], 1);
3057 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3059 struct device *dev = &adapter->vdev->dev;
3060 union ibmvnic_crq crq;
3064 /* Sub-CRQ entries are 32 byte long */
3065 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3067 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3068 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3069 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3073 if (adapter->desired.mtu)
3074 adapter->req_mtu = adapter->desired.mtu;
3076 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3078 if (!adapter->desired.tx_entries)
3079 adapter->desired.tx_entries =
3080 adapter->max_tx_entries_per_subcrq;
3081 if (!adapter->desired.rx_entries)
3082 adapter->desired.rx_entries =
3083 adapter->max_rx_add_entries_per_subcrq;
3085 max_entries = IBMVNIC_MAX_LTB_SIZE /
3086 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3088 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3089 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3090 adapter->desired.tx_entries = max_entries;
3093 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3094 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3095 adapter->desired.rx_entries = max_entries;
3098 if (adapter->desired.tx_entries)
3099 adapter->req_tx_entries_per_subcrq =
3100 adapter->desired.tx_entries;
3102 adapter->req_tx_entries_per_subcrq =
3103 adapter->max_tx_entries_per_subcrq;
3105 if (adapter->desired.rx_entries)
3106 adapter->req_rx_add_entries_per_subcrq =
3107 adapter->desired.rx_entries;
3109 adapter->req_rx_add_entries_per_subcrq =
3110 adapter->max_rx_add_entries_per_subcrq;
3112 if (adapter->desired.tx_queues)
3113 adapter->req_tx_queues =
3114 adapter->desired.tx_queues;
3116 adapter->req_tx_queues =
3117 adapter->opt_tx_comp_sub_queues;
3119 if (adapter->desired.rx_queues)
3120 adapter->req_rx_queues =
3121 adapter->desired.rx_queues;
3123 adapter->req_rx_queues =
3124 adapter->opt_rx_comp_queues;
3126 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3129 memset(&crq, 0, sizeof(crq));
3130 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3131 crq.request_capability.cmd = REQUEST_CAPABILITY;
3133 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3134 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3135 atomic_inc(&adapter->running_cap_crqs);
3136 ibmvnic_send_crq(adapter, &crq);
3138 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3139 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3140 atomic_inc(&adapter->running_cap_crqs);
3141 ibmvnic_send_crq(adapter, &crq);
3143 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3144 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3145 atomic_inc(&adapter->running_cap_crqs);
3146 ibmvnic_send_crq(adapter, &crq);
3148 crq.request_capability.capability =
3149 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3150 crq.request_capability.number =
3151 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3152 atomic_inc(&adapter->running_cap_crqs);
3153 ibmvnic_send_crq(adapter, &crq);
3155 crq.request_capability.capability =
3156 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3157 crq.request_capability.number =
3158 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3159 atomic_inc(&adapter->running_cap_crqs);
3160 ibmvnic_send_crq(adapter, &crq);
3162 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3163 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3164 atomic_inc(&adapter->running_cap_crqs);
3165 ibmvnic_send_crq(adapter, &crq);
3167 if (adapter->netdev->flags & IFF_PROMISC) {
3168 if (adapter->promisc_supported) {
3169 crq.request_capability.capability =
3170 cpu_to_be16(PROMISC_REQUESTED);
3171 crq.request_capability.number = cpu_to_be64(1);
3172 atomic_inc(&adapter->running_cap_crqs);
3173 ibmvnic_send_crq(adapter, &crq);
3176 crq.request_capability.capability =
3177 cpu_to_be16(PROMISC_REQUESTED);
3178 crq.request_capability.number = cpu_to_be64(0);
3179 atomic_inc(&adapter->running_cap_crqs);
3180 ibmvnic_send_crq(adapter, &crq);
3184 static int pending_scrq(struct ibmvnic_adapter *adapter,
3185 struct ibmvnic_sub_crq_queue *scrq)
3187 union sub_crq *entry = &scrq->msgs[scrq->cur];
3189 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3195 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3196 struct ibmvnic_sub_crq_queue *scrq)
3198 union sub_crq *entry;
3199 unsigned long flags;
3201 spin_lock_irqsave(&scrq->lock, flags);
3202 entry = &scrq->msgs[scrq->cur];
3203 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3204 if (++scrq->cur == scrq->size)
3209 spin_unlock_irqrestore(&scrq->lock, flags);
3214 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3216 struct ibmvnic_crq_queue *queue = &adapter->crq;
3217 union ibmvnic_crq *crq;
3219 crq = &queue->msgs[queue->cur];
3220 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3221 if (++queue->cur == queue->size)
3230 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3234 dev_warn_ratelimited(dev,
3235 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3239 dev_warn_ratelimited(dev,
3240 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3244 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3249 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3250 union sub_crq *sub_crq)
3252 unsigned int ua = adapter->vdev->unit_address;
3253 struct device *dev = &adapter->vdev->dev;
3254 u64 *u64_crq = (u64 *)sub_crq;
3257 netdev_dbg(adapter->netdev,
3258 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3259 (unsigned long int)cpu_to_be64(remote_handle),
3260 (unsigned long int)cpu_to_be64(u64_crq[0]),
3261 (unsigned long int)cpu_to_be64(u64_crq[1]),
3262 (unsigned long int)cpu_to_be64(u64_crq[2]),
3263 (unsigned long int)cpu_to_be64(u64_crq[3]));
3265 /* Make sure the hypervisor sees the complete request */
3268 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3269 cpu_to_be64(remote_handle),
3270 cpu_to_be64(u64_crq[0]),
3271 cpu_to_be64(u64_crq[1]),
3272 cpu_to_be64(u64_crq[2]),
3273 cpu_to_be64(u64_crq[3]));
3276 print_subcrq_error(dev, rc, __func__);
3281 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3282 u64 remote_handle, u64 ioba, u64 num_entries)
3284 unsigned int ua = adapter->vdev->unit_address;
3285 struct device *dev = &adapter->vdev->dev;
3288 /* Make sure the hypervisor sees the complete request */
3290 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3291 cpu_to_be64(remote_handle),
3295 print_subcrq_error(dev, rc, __func__);
3300 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3301 union ibmvnic_crq *crq)
3303 unsigned int ua = adapter->vdev->unit_address;
3304 struct device *dev = &adapter->vdev->dev;
3305 u64 *u64_crq = (u64 *)crq;
3308 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3309 (unsigned long int)cpu_to_be64(u64_crq[0]),
3310 (unsigned long int)cpu_to_be64(u64_crq[1]));
3312 if (!adapter->crq.active &&
3313 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3314 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3318 /* Make sure the hypervisor sees the complete request */
3321 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3322 cpu_to_be64(u64_crq[0]),
3323 cpu_to_be64(u64_crq[1]));
3326 if (rc == H_CLOSED) {
3327 dev_warn(dev, "CRQ Queue closed\n");
3328 if (adapter->resetting)
3329 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3332 dev_warn(dev, "Send error (rc=%d)\n", rc);
3338 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3340 union ibmvnic_crq crq;
3342 memset(&crq, 0, sizeof(crq));
3343 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3344 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3345 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3347 return ibmvnic_send_crq(adapter, &crq);
3350 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3352 union ibmvnic_crq crq;
3354 memset(&crq, 0, sizeof(crq));
3355 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3356 crq.version_exchange.cmd = VERSION_EXCHANGE;
3357 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3359 return ibmvnic_send_crq(adapter, &crq);
3362 struct vnic_login_client_data {
3368 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3372 /* Calculate the amount of buffer space needed for the
3373 * vnic client data in the login buffer. There are four entries,
3374 * OS name, LPAR name, device name, and a null last entry.
3376 len = 4 * sizeof(struct vnic_login_client_data);
3377 len += 6; /* "Linux" plus NULL */
3378 len += strlen(utsname()->nodename) + 1;
3379 len += strlen(adapter->netdev->name) + 1;
3384 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3385 struct vnic_login_client_data *vlcd)
3387 const char *os_name = "Linux";
3390 /* Type 1 - LPAR OS */
3392 len = strlen(os_name) + 1;
3393 vlcd->len = cpu_to_be16(len);
3394 strncpy(vlcd->name, os_name, len);
3395 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3397 /* Type 2 - LPAR name */
3399 len = strlen(utsname()->nodename) + 1;
3400 vlcd->len = cpu_to_be16(len);
3401 strncpy(vlcd->name, utsname()->nodename, len);
3402 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3404 /* Type 3 - device name */
3406 len = strlen(adapter->netdev->name) + 1;
3407 vlcd->len = cpu_to_be16(len);
3408 strncpy(vlcd->name, adapter->netdev->name, len);
3411 static int send_login(struct ibmvnic_adapter *adapter)
3413 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3414 struct ibmvnic_login_buffer *login_buffer;
3415 struct device *dev = &adapter->vdev->dev;
3416 dma_addr_t rsp_buffer_token;
3417 dma_addr_t buffer_token;
3418 size_t rsp_buffer_size;
3419 union ibmvnic_crq crq;
3423 int client_data_len;
3424 struct vnic_login_client_data *vlcd;
3427 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3428 netdev_err(adapter->netdev,
3429 "RX or TX queues are not allocated, device login failed\n");
3433 release_login_rsp_buffer(adapter);
3434 client_data_len = vnic_client_data_len(adapter);
3437 sizeof(struct ibmvnic_login_buffer) +
3438 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3441 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3443 goto buf_alloc_failed;
3445 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3447 if (dma_mapping_error(dev, buffer_token)) {
3448 dev_err(dev, "Couldn't map login buffer\n");
3449 goto buf_map_failed;
3452 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3453 sizeof(u64) * adapter->req_tx_queues +
3454 sizeof(u64) * adapter->req_rx_queues +
3455 sizeof(u64) * adapter->req_rx_queues +
3456 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3458 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3459 if (!login_rsp_buffer)
3460 goto buf_rsp_alloc_failed;
3462 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3463 rsp_buffer_size, DMA_FROM_DEVICE);
3464 if (dma_mapping_error(dev, rsp_buffer_token)) {
3465 dev_err(dev, "Couldn't map login rsp buffer\n");
3466 goto buf_rsp_map_failed;
3469 adapter->login_buf = login_buffer;
3470 adapter->login_buf_token = buffer_token;
3471 adapter->login_buf_sz = buffer_size;
3472 adapter->login_rsp_buf = login_rsp_buffer;
3473 adapter->login_rsp_buf_token = rsp_buffer_token;
3474 adapter->login_rsp_buf_sz = rsp_buffer_size;
3476 login_buffer->len = cpu_to_be32(buffer_size);
3477 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3478 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3479 login_buffer->off_txcomp_subcrqs =
3480 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3481 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3482 login_buffer->off_rxcomp_subcrqs =
3483 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3484 sizeof(u64) * adapter->req_tx_queues);
3485 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3486 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3488 tx_list_p = (__be64 *)((char *)login_buffer +
3489 sizeof(struct ibmvnic_login_buffer));
3490 rx_list_p = (__be64 *)((char *)login_buffer +
3491 sizeof(struct ibmvnic_login_buffer) +
3492 sizeof(u64) * adapter->req_tx_queues);
3494 for (i = 0; i < adapter->req_tx_queues; i++) {
3495 if (adapter->tx_scrq[i]) {
3496 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3501 for (i = 0; i < adapter->req_rx_queues; i++) {
3502 if (adapter->rx_scrq[i]) {
3503 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3508 /* Insert vNIC login client data */
3509 vlcd = (struct vnic_login_client_data *)
3510 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3511 login_buffer->client_data_offset =
3512 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3513 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3515 vnic_add_client_data(adapter, vlcd);
3517 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3518 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3519 netdev_dbg(adapter->netdev, "%016lx\n",
3520 ((unsigned long int *)(adapter->login_buf))[i]);
3523 memset(&crq, 0, sizeof(crq));
3524 crq.login.first = IBMVNIC_CRQ_CMD;
3525 crq.login.cmd = LOGIN;
3526 crq.login.ioba = cpu_to_be32(buffer_token);
3527 crq.login.len = cpu_to_be32(buffer_size);
3528 ibmvnic_send_crq(adapter, &crq);
3533 kfree(login_rsp_buffer);
3534 buf_rsp_alloc_failed:
3535 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3537 kfree(login_buffer);
3542 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3545 union ibmvnic_crq crq;
3547 memset(&crq, 0, sizeof(crq));
3548 crq.request_map.first = IBMVNIC_CRQ_CMD;
3549 crq.request_map.cmd = REQUEST_MAP;
3550 crq.request_map.map_id = map_id;
3551 crq.request_map.ioba = cpu_to_be32(addr);
3552 crq.request_map.len = cpu_to_be32(len);
3553 return ibmvnic_send_crq(adapter, &crq);
3556 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3558 union ibmvnic_crq crq;
3560 memset(&crq, 0, sizeof(crq));
3561 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3562 crq.request_unmap.cmd = REQUEST_UNMAP;
3563 crq.request_unmap.map_id = map_id;
3564 return ibmvnic_send_crq(adapter, &crq);
3567 static void send_map_query(struct ibmvnic_adapter *adapter)
3569 union ibmvnic_crq crq;
3571 memset(&crq, 0, sizeof(crq));
3572 crq.query_map.first = IBMVNIC_CRQ_CMD;
3573 crq.query_map.cmd = QUERY_MAP;
3574 ibmvnic_send_crq(adapter, &crq);
3577 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3578 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3580 union ibmvnic_crq crq;
3582 atomic_set(&adapter->running_cap_crqs, 0);
3583 memset(&crq, 0, sizeof(crq));
3584 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3585 crq.query_capability.cmd = QUERY_CAPABILITY;
3587 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3588 atomic_inc(&adapter->running_cap_crqs);
3589 ibmvnic_send_crq(adapter, &crq);
3591 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3592 atomic_inc(&adapter->running_cap_crqs);
3593 ibmvnic_send_crq(adapter, &crq);
3595 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3596 atomic_inc(&adapter->running_cap_crqs);
3597 ibmvnic_send_crq(adapter, &crq);
3599 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3600 atomic_inc(&adapter->running_cap_crqs);
3601 ibmvnic_send_crq(adapter, &crq);
3603 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3604 atomic_inc(&adapter->running_cap_crqs);
3605 ibmvnic_send_crq(adapter, &crq);
3607 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3608 atomic_inc(&adapter->running_cap_crqs);
3609 ibmvnic_send_crq(adapter, &crq);
3611 crq.query_capability.capability =
3612 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3613 atomic_inc(&adapter->running_cap_crqs);
3614 ibmvnic_send_crq(adapter, &crq);
3616 crq.query_capability.capability =
3617 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3618 atomic_inc(&adapter->running_cap_crqs);
3619 ibmvnic_send_crq(adapter, &crq);
3621 crq.query_capability.capability =
3622 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3623 atomic_inc(&adapter->running_cap_crqs);
3624 ibmvnic_send_crq(adapter, &crq);
3626 crq.query_capability.capability =
3627 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3628 atomic_inc(&adapter->running_cap_crqs);
3629 ibmvnic_send_crq(adapter, &crq);
3631 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3632 atomic_inc(&adapter->running_cap_crqs);
3633 ibmvnic_send_crq(adapter, &crq);
3635 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3636 atomic_inc(&adapter->running_cap_crqs);
3637 ibmvnic_send_crq(adapter, &crq);
3639 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3640 atomic_inc(&adapter->running_cap_crqs);
3641 ibmvnic_send_crq(adapter, &crq);
3643 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3644 atomic_inc(&adapter->running_cap_crqs);
3645 ibmvnic_send_crq(adapter, &crq);
3647 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3648 atomic_inc(&adapter->running_cap_crqs);
3649 ibmvnic_send_crq(adapter, &crq);
3651 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3652 atomic_inc(&adapter->running_cap_crqs);
3653 ibmvnic_send_crq(adapter, &crq);
3655 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3656 atomic_inc(&adapter->running_cap_crqs);
3657 ibmvnic_send_crq(adapter, &crq);
3659 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3660 atomic_inc(&adapter->running_cap_crqs);
3661 ibmvnic_send_crq(adapter, &crq);
3663 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3664 atomic_inc(&adapter->running_cap_crqs);
3665 ibmvnic_send_crq(adapter, &crq);
3667 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3668 atomic_inc(&adapter->running_cap_crqs);
3669 ibmvnic_send_crq(adapter, &crq);
3671 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3672 atomic_inc(&adapter->running_cap_crqs);
3673 ibmvnic_send_crq(adapter, &crq);
3675 crq.query_capability.capability =
3676 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3677 atomic_inc(&adapter->running_cap_crqs);
3678 ibmvnic_send_crq(adapter, &crq);
3680 crq.query_capability.capability =
3681 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3682 atomic_inc(&adapter->running_cap_crqs);
3683 ibmvnic_send_crq(adapter, &crq);
3685 crq.query_capability.capability =
3686 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3687 atomic_inc(&adapter->running_cap_crqs);
3688 ibmvnic_send_crq(adapter, &crq);
3690 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3691 atomic_inc(&adapter->running_cap_crqs);
3692 ibmvnic_send_crq(adapter, &crq);
3695 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3696 struct ibmvnic_adapter *adapter)
3698 struct device *dev = &adapter->vdev->dev;
3700 if (crq->get_vpd_size_rsp.rc.code) {
3701 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3702 crq->get_vpd_size_rsp.rc.code);
3703 complete(&adapter->fw_done);
3707 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3708 complete(&adapter->fw_done);
3711 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3712 struct ibmvnic_adapter *adapter)
3714 struct device *dev = &adapter->vdev->dev;
3715 unsigned char *substr = NULL;
3716 u8 fw_level_len = 0;
3718 memset(adapter->fw_version, 0, 32);
3720 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3723 if (crq->get_vpd_rsp.rc.code) {
3724 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3725 crq->get_vpd_rsp.rc.code);
3729 /* get the position of the firmware version info
3730 * located after the ASCII 'RM' substring in the buffer
3732 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3734 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3738 /* get length of firmware level ASCII substring */
3739 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3740 fw_level_len = *(substr + 2);
3742 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3746 /* copy firmware version string from vpd into adapter */
3747 if ((substr + 3 + fw_level_len) <
3748 (adapter->vpd->buff + adapter->vpd->len)) {
3749 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3751 dev_info(dev, "FW substr extrapolated VPD buff\n");
3755 if (adapter->fw_version[0] == '\0')
3756 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3757 complete(&adapter->fw_done);
3760 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3762 struct device *dev = &adapter->vdev->dev;
3763 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3764 union ibmvnic_crq crq;
3767 dma_unmap_single(dev, adapter->ip_offload_tok,
3768 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3770 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3771 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3772 netdev_dbg(adapter->netdev, "%016lx\n",
3773 ((unsigned long int *)(buf))[i]);
3775 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3776 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3777 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3778 buf->tcp_ipv4_chksum);
3779 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3780 buf->tcp_ipv6_chksum);
3781 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3782 buf->udp_ipv4_chksum);
3783 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3784 buf->udp_ipv6_chksum);
3785 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3786 buf->large_tx_ipv4);
3787 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3788 buf->large_tx_ipv6);
3789 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3790 buf->large_rx_ipv4);
3791 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3792 buf->large_rx_ipv6);
3793 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3794 buf->max_ipv4_header_size);
3795 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3796 buf->max_ipv6_header_size);
3797 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3798 buf->max_tcp_header_size);
3799 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3800 buf->max_udp_header_size);
3801 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3802 buf->max_large_tx_size);
3803 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3804 buf->max_large_rx_size);
3805 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3806 buf->ipv6_extension_header);
3807 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3808 buf->tcp_pseudosum_req);
3809 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3810 buf->num_ipv6_ext_headers);
3811 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3812 buf->off_ipv6_ext_headers);
3814 adapter->ip_offload_ctrl_tok =
3815 dma_map_single(dev, &adapter->ip_offload_ctrl,
3816 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3818 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3819 dev_err(dev, "Couldn't map ip offload control buffer\n");
3823 adapter->ip_offload_ctrl.len =
3824 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3825 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3826 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3827 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3828 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3829 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3830 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3831 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3832 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3833 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3835 /* large_rx disabled for now, additional features needed */
3836 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3837 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3839 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3841 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3842 adapter->netdev->features |= NETIF_F_IP_CSUM;
3844 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3845 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3847 if ((adapter->netdev->features &
3848 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3849 adapter->netdev->features |= NETIF_F_RXCSUM;
3851 if (buf->large_tx_ipv4)
3852 adapter->netdev->features |= NETIF_F_TSO;
3853 if (buf->large_tx_ipv6)
3854 adapter->netdev->features |= NETIF_F_TSO6;
3856 adapter->netdev->hw_features |= adapter->netdev->features;
3858 memset(&crq, 0, sizeof(crq));
3859 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3860 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3861 crq.control_ip_offload.len =
3862 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3863 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3864 ibmvnic_send_crq(adapter, &crq);
3867 static const char *ibmvnic_fw_err_cause(u16 cause)
3870 case ADAPTER_PROBLEM:
3871 return "adapter problem";
3873 return "bus problem";
3875 return "firmware problem";
3877 return "device driver problem";
3879 return "EEH recovery";
3881 return "firmware updated";
3883 return "low Memory";
3889 static void handle_error_indication(union ibmvnic_crq *crq,
3890 struct ibmvnic_adapter *adapter)
3892 struct device *dev = &adapter->vdev->dev;
3895 cause = be16_to_cpu(crq->error_indication.error_cause);
3897 dev_warn_ratelimited(dev,
3898 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3899 crq->error_indication.flags
3900 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3901 ibmvnic_fw_err_cause(cause));
3903 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3904 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3906 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3909 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3910 struct ibmvnic_adapter *adapter)
3912 struct net_device *netdev = adapter->netdev;
3913 struct device *dev = &adapter->vdev->dev;
3916 rc = crq->change_mac_addr_rsp.rc.code;
3918 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3921 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3924 complete(&adapter->fw_done);
3928 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3929 struct ibmvnic_adapter *adapter)
3931 struct device *dev = &adapter->vdev->dev;
3935 atomic_dec(&adapter->running_cap_crqs);
3936 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3938 req_value = &adapter->req_tx_queues;
3942 req_value = &adapter->req_rx_queues;
3945 case REQ_RX_ADD_QUEUES:
3946 req_value = &adapter->req_rx_add_queues;
3949 case REQ_TX_ENTRIES_PER_SUBCRQ:
3950 req_value = &adapter->req_tx_entries_per_subcrq;
3951 name = "tx_entries_per_subcrq";
3953 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3954 req_value = &adapter->req_rx_add_entries_per_subcrq;
3955 name = "rx_add_entries_per_subcrq";
3958 req_value = &adapter->req_mtu;
3961 case PROMISC_REQUESTED:
3962 req_value = &adapter->promisc;
3966 dev_err(dev, "Got invalid cap request rsp %d\n",
3967 crq->request_capability.capability);
3971 switch (crq->request_capability_rsp.rc.code) {
3974 case PARTIALSUCCESS:
3975 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3977 (long int)be64_to_cpu(crq->request_capability_rsp.
3980 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3982 pr_err("mtu of %llu is not supported. Reverting.\n",
3984 *req_value = adapter->fallback.mtu;
3987 be64_to_cpu(crq->request_capability_rsp.number);
3990 ibmvnic_send_req_caps(adapter, 1);
3993 dev_err(dev, "Error %d in request cap rsp\n",
3994 crq->request_capability_rsp.rc.code);
3998 /* Done receiving requested capabilities, query IP offload support */
3999 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4000 union ibmvnic_crq newcrq;
4001 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4002 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4003 &adapter->ip_offload_buf;
4005 adapter->wait_capability = false;
4006 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4010 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4011 if (!firmware_has_feature(FW_FEATURE_CMO))
4012 dev_err(dev, "Couldn't map offload buffer\n");
4016 memset(&newcrq, 0, sizeof(newcrq));
4017 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4018 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4019 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4020 newcrq.query_ip_offload.ioba =
4021 cpu_to_be32(adapter->ip_offload_tok);
4023 ibmvnic_send_crq(adapter, &newcrq);
4027 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4028 struct ibmvnic_adapter *adapter)
4030 struct device *dev = &adapter->vdev->dev;
4031 struct net_device *netdev = adapter->netdev;
4032 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4033 struct ibmvnic_login_buffer *login = adapter->login_buf;
4036 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4038 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4039 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4041 /* If the number of queues requested can't be allocated by the
4042 * server, the login response will return with code 1. We will need
4043 * to resend the login buffer with fewer queues requested.
4045 if (login_rsp_crq->generic.rc.code) {
4046 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4047 complete(&adapter->init_done);
4051 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4053 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4054 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4055 netdev_dbg(adapter->netdev, "%016lx\n",
4056 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4060 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4061 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4062 adapter->req_rx_add_queues !=
4063 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4064 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4065 ibmvnic_remove(adapter->vdev);
4068 release_login_buffer(adapter);
4069 complete(&adapter->init_done);
4074 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4075 struct ibmvnic_adapter *adapter)
4077 struct device *dev = &adapter->vdev->dev;
4080 rc = crq->request_unmap_rsp.rc.code;
4082 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4085 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4086 struct ibmvnic_adapter *adapter)
4088 struct net_device *netdev = adapter->netdev;
4089 struct device *dev = &adapter->vdev->dev;
4092 rc = crq->query_map_rsp.rc.code;
4094 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4097 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4098 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4099 crq->query_map_rsp.free_pages);
4102 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4103 struct ibmvnic_adapter *adapter)
4105 struct net_device *netdev = adapter->netdev;
4106 struct device *dev = &adapter->vdev->dev;
4109 atomic_dec(&adapter->running_cap_crqs);
4110 netdev_dbg(netdev, "Outstanding queries: %d\n",
4111 atomic_read(&adapter->running_cap_crqs));
4112 rc = crq->query_capability.rc.code;
4114 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4118 switch (be16_to_cpu(crq->query_capability.capability)) {
4120 adapter->min_tx_queues =
4121 be64_to_cpu(crq->query_capability.number);
4122 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4123 adapter->min_tx_queues);
4126 adapter->min_rx_queues =
4127 be64_to_cpu(crq->query_capability.number);
4128 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4129 adapter->min_rx_queues);
4131 case MIN_RX_ADD_QUEUES:
4132 adapter->min_rx_add_queues =
4133 be64_to_cpu(crq->query_capability.number);
4134 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4135 adapter->min_rx_add_queues);
4138 adapter->max_tx_queues =
4139 be64_to_cpu(crq->query_capability.number);
4140 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4141 adapter->max_tx_queues);
4144 adapter->max_rx_queues =
4145 be64_to_cpu(crq->query_capability.number);
4146 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4147 adapter->max_rx_queues);
4149 case MAX_RX_ADD_QUEUES:
4150 adapter->max_rx_add_queues =
4151 be64_to_cpu(crq->query_capability.number);
4152 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4153 adapter->max_rx_add_queues);
4155 case MIN_TX_ENTRIES_PER_SUBCRQ:
4156 adapter->min_tx_entries_per_subcrq =
4157 be64_to_cpu(crq->query_capability.number);
4158 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4159 adapter->min_tx_entries_per_subcrq);
4161 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4162 adapter->min_rx_add_entries_per_subcrq =
4163 be64_to_cpu(crq->query_capability.number);
4164 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4165 adapter->min_rx_add_entries_per_subcrq);
4167 case MAX_TX_ENTRIES_PER_SUBCRQ:
4168 adapter->max_tx_entries_per_subcrq =
4169 be64_to_cpu(crq->query_capability.number);
4170 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4171 adapter->max_tx_entries_per_subcrq);
4173 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4174 adapter->max_rx_add_entries_per_subcrq =
4175 be64_to_cpu(crq->query_capability.number);
4176 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4177 adapter->max_rx_add_entries_per_subcrq);
4179 case TCP_IP_OFFLOAD:
4180 adapter->tcp_ip_offload =
4181 be64_to_cpu(crq->query_capability.number);
4182 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4183 adapter->tcp_ip_offload);
4185 case PROMISC_SUPPORTED:
4186 adapter->promisc_supported =
4187 be64_to_cpu(crq->query_capability.number);
4188 netdev_dbg(netdev, "promisc_supported = %lld\n",
4189 adapter->promisc_supported);
4192 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4193 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4194 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4197 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4198 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4199 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4201 case MAX_MULTICAST_FILTERS:
4202 adapter->max_multicast_filters =
4203 be64_to_cpu(crq->query_capability.number);
4204 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4205 adapter->max_multicast_filters);
4207 case VLAN_HEADER_INSERTION:
4208 adapter->vlan_header_insertion =
4209 be64_to_cpu(crq->query_capability.number);
4210 if (adapter->vlan_header_insertion)
4211 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4212 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4213 adapter->vlan_header_insertion);
4215 case RX_VLAN_HEADER_INSERTION:
4216 adapter->rx_vlan_header_insertion =
4217 be64_to_cpu(crq->query_capability.number);
4218 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4219 adapter->rx_vlan_header_insertion);
4221 case MAX_TX_SG_ENTRIES:
4222 adapter->max_tx_sg_entries =
4223 be64_to_cpu(crq->query_capability.number);
4224 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4225 adapter->max_tx_sg_entries);
4227 case RX_SG_SUPPORTED:
4228 adapter->rx_sg_supported =
4229 be64_to_cpu(crq->query_capability.number);
4230 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4231 adapter->rx_sg_supported);
4233 case OPT_TX_COMP_SUB_QUEUES:
4234 adapter->opt_tx_comp_sub_queues =
4235 be64_to_cpu(crq->query_capability.number);
4236 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4237 adapter->opt_tx_comp_sub_queues);
4239 case OPT_RX_COMP_QUEUES:
4240 adapter->opt_rx_comp_queues =
4241 be64_to_cpu(crq->query_capability.number);
4242 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4243 adapter->opt_rx_comp_queues);
4245 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4246 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4247 be64_to_cpu(crq->query_capability.number);
4248 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4249 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4251 case OPT_TX_ENTRIES_PER_SUBCRQ:
4252 adapter->opt_tx_entries_per_subcrq =
4253 be64_to_cpu(crq->query_capability.number);
4254 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4255 adapter->opt_tx_entries_per_subcrq);
4257 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4258 adapter->opt_rxba_entries_per_subcrq =
4259 be64_to_cpu(crq->query_capability.number);
4260 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4261 adapter->opt_rxba_entries_per_subcrq);
4263 case TX_RX_DESC_REQ:
4264 adapter->tx_rx_desc_req = crq->query_capability.number;
4265 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4266 adapter->tx_rx_desc_req);
4270 netdev_err(netdev, "Got invalid cap rsp %d\n",
4271 crq->query_capability.capability);
4275 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4276 adapter->wait_capability = false;
4277 ibmvnic_send_req_caps(adapter, 0);
4281 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4282 struct ibmvnic_adapter *adapter)
4284 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4285 struct net_device *netdev = adapter->netdev;
4286 struct device *dev = &adapter->vdev->dev;
4287 u64 *u64_crq = (u64 *)crq;
4290 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4291 (unsigned long int)cpu_to_be64(u64_crq[0]),
4292 (unsigned long int)cpu_to_be64(u64_crq[1]));
4293 switch (gen_crq->first) {
4294 case IBMVNIC_CRQ_INIT_RSP:
4295 switch (gen_crq->cmd) {
4296 case IBMVNIC_CRQ_INIT:
4297 dev_info(dev, "Partner initialized\n");
4298 adapter->from_passive_init = true;
4299 adapter->failover_pending = false;
4300 if (!completion_done(&adapter->init_done)) {
4301 complete(&adapter->init_done);
4302 adapter->init_done_rc = -EIO;
4304 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4306 case IBMVNIC_CRQ_INIT_COMPLETE:
4307 dev_info(dev, "Partner initialization complete\n");
4308 adapter->crq.active = true;
4309 send_version_xchg(adapter);
4312 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4315 case IBMVNIC_CRQ_XPORT_EVENT:
4316 netif_carrier_off(netdev);
4317 adapter->crq.active = false;
4318 if (adapter->resetting)
4319 adapter->force_reset_recovery = true;
4320 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4321 dev_info(dev, "Migrated, re-enabling adapter\n");
4322 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4323 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4324 dev_info(dev, "Backing device failover detected\n");
4325 adapter->failover_pending = true;
4327 /* The adapter lost the connection */
4328 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4330 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4333 case IBMVNIC_CRQ_CMD_RSP:
4336 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4341 switch (gen_crq->cmd) {
4342 case VERSION_EXCHANGE_RSP:
4343 rc = crq->version_exchange_rsp.rc.code;
4345 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4348 dev_info(dev, "Partner protocol version is %d\n",
4349 crq->version_exchange_rsp.version);
4350 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4353 be16_to_cpu(crq->version_exchange_rsp.version);
4354 send_cap_queries(adapter);
4356 case QUERY_CAPABILITY_RSP:
4357 handle_query_cap_rsp(crq, adapter);
4360 handle_query_map_rsp(crq, adapter);
4362 case REQUEST_MAP_RSP:
4363 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4364 complete(&adapter->fw_done);
4366 case REQUEST_UNMAP_RSP:
4367 handle_request_unmap_rsp(crq, adapter);
4369 case REQUEST_CAPABILITY_RSP:
4370 handle_request_cap_rsp(crq, adapter);
4373 netdev_dbg(netdev, "Got Login Response\n");
4374 handle_login_rsp(crq, adapter);
4376 case LOGICAL_LINK_STATE_RSP:
4378 "Got Logical Link State Response, state: %d rc: %d\n",
4379 crq->logical_link_state_rsp.link_state,
4380 crq->logical_link_state_rsp.rc.code);
4381 adapter->logical_link_state =
4382 crq->logical_link_state_rsp.link_state;
4383 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4384 complete(&adapter->init_done);
4386 case LINK_STATE_INDICATION:
4387 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4388 adapter->phys_link_state =
4389 crq->link_state_indication.phys_link_state;
4390 adapter->logical_link_state =
4391 crq->link_state_indication.logical_link_state;
4393 case CHANGE_MAC_ADDR_RSP:
4394 netdev_dbg(netdev, "Got MAC address change Response\n");
4395 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4397 case ERROR_INDICATION:
4398 netdev_dbg(netdev, "Got Error Indication\n");
4399 handle_error_indication(crq, adapter);
4401 case REQUEST_STATISTICS_RSP:
4402 netdev_dbg(netdev, "Got Statistics Response\n");
4403 complete(&adapter->stats_done);
4405 case QUERY_IP_OFFLOAD_RSP:
4406 netdev_dbg(netdev, "Got Query IP offload Response\n");
4407 handle_query_ip_offload_rsp(adapter);
4409 case MULTICAST_CTRL_RSP:
4410 netdev_dbg(netdev, "Got multicast control Response\n");
4412 case CONTROL_IP_OFFLOAD_RSP:
4413 netdev_dbg(netdev, "Got Control IP offload Response\n");
4414 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4415 sizeof(adapter->ip_offload_ctrl),
4417 complete(&adapter->init_done);
4419 case COLLECT_FW_TRACE_RSP:
4420 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4421 complete(&adapter->fw_done);
4423 case GET_VPD_SIZE_RSP:
4424 handle_vpd_size_rsp(crq, adapter);
4427 handle_vpd_rsp(crq, adapter);
4430 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4435 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4437 struct ibmvnic_adapter *adapter = instance;
4439 tasklet_schedule(&adapter->tasklet);
4443 static void ibmvnic_tasklet(void *data)
4445 struct ibmvnic_adapter *adapter = data;
4446 struct ibmvnic_crq_queue *queue = &adapter->crq;
4447 union ibmvnic_crq *crq;
4448 unsigned long flags;
4451 spin_lock_irqsave(&queue->lock, flags);
4453 /* Pull all the valid messages off the CRQ */
4454 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4455 ibmvnic_handle_crq(crq, adapter);
4456 crq->generic.first = 0;
4459 /* remain in tasklet until all
4460 * capabilities responses are received
4462 if (!adapter->wait_capability)
4465 /* if capabilities CRQ's were sent in this tasklet, the following
4466 * tasklet must wait until all responses are received
4468 if (atomic_read(&adapter->running_cap_crqs) != 0)
4469 adapter->wait_capability = true;
4470 spin_unlock_irqrestore(&queue->lock, flags);
4473 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4475 struct vio_dev *vdev = adapter->vdev;
4479 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4480 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4483 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4488 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4490 struct ibmvnic_crq_queue *crq = &adapter->crq;
4491 struct device *dev = &adapter->vdev->dev;
4492 struct vio_dev *vdev = adapter->vdev;
4497 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4498 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4500 /* Clean out the queue */
4501 memset(crq->msgs, 0, PAGE_SIZE);
4503 crq->active = false;
4505 /* And re-open it again */
4506 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4507 crq->msg_token, PAGE_SIZE);
4510 /* Adapter is good, but other end is not ready */
4511 dev_warn(dev, "Partner adapter not ready\n");
4513 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4518 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4520 struct ibmvnic_crq_queue *crq = &adapter->crq;
4521 struct vio_dev *vdev = adapter->vdev;
4527 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4528 free_irq(vdev->irq, adapter);
4529 tasklet_kill(&adapter->tasklet);
4531 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4532 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4534 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4536 free_page((unsigned long)crq->msgs);
4538 crq->active = false;
4541 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4543 struct ibmvnic_crq_queue *crq = &adapter->crq;
4544 struct device *dev = &adapter->vdev->dev;
4545 struct vio_dev *vdev = adapter->vdev;
4546 int rc, retrc = -ENOMEM;
4551 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4552 /* Should we allocate more than one page? */
4557 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4558 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4560 if (dma_mapping_error(dev, crq->msg_token))
4563 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4564 crq->msg_token, PAGE_SIZE);
4566 if (rc == H_RESOURCE)
4567 /* maybe kexecing and resource is busy. try a reset */
4568 rc = ibmvnic_reset_crq(adapter);
4571 if (rc == H_CLOSED) {
4572 dev_warn(dev, "Partner adapter not ready\n");
4574 dev_warn(dev, "Error %d opening adapter\n", rc);
4575 goto reg_crq_failed;
4580 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4581 (unsigned long)adapter);
4583 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4584 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4587 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4589 goto req_irq_failed;
4592 rc = vio_enable_interrupts(vdev);
4594 dev_err(dev, "Error %d enabling interrupts\n", rc);
4595 goto req_irq_failed;
4599 spin_lock_init(&crq->lock);
4604 tasklet_kill(&adapter->tasklet);
4606 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4607 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4609 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4611 free_page((unsigned long)crq->msgs);
4616 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4618 struct device *dev = &adapter->vdev->dev;
4619 unsigned long timeout = msecs_to_jiffies(30000);
4620 u64 old_num_rx_queues, old_num_tx_queues;
4623 adapter->from_passive_init = false;
4625 old_num_rx_queues = adapter->req_rx_queues;
4626 old_num_tx_queues = adapter->req_tx_queues;
4628 init_completion(&adapter->init_done);
4629 adapter->init_done_rc = 0;
4630 ibmvnic_send_crq_init(adapter);
4631 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4632 dev_err(dev, "Initialization sequence timed out\n");
4636 if (adapter->init_done_rc) {
4637 release_crq_queue(adapter);
4638 return adapter->init_done_rc;
4641 if (adapter->from_passive_init) {
4642 adapter->state = VNIC_OPEN;
4643 adapter->from_passive_init = false;
4647 if (adapter->resetting && !adapter->wait_for_reset &&
4648 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4649 if (adapter->req_rx_queues != old_num_rx_queues ||
4650 adapter->req_tx_queues != old_num_tx_queues) {
4651 release_sub_crqs(adapter, 0);
4652 rc = init_sub_crqs(adapter);
4654 rc = reset_sub_crq_queues(adapter);
4657 rc = init_sub_crqs(adapter);
4661 dev_err(dev, "Initialization of sub crqs failed\n");
4662 release_crq_queue(adapter);
4666 rc = init_sub_crq_irqs(adapter);
4668 dev_err(dev, "Failed to initialize sub crq irqs\n");
4669 release_crq_queue(adapter);
4675 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4677 struct device *dev = &adapter->vdev->dev;
4678 unsigned long timeout = msecs_to_jiffies(30000);
4681 adapter->from_passive_init = false;
4683 init_completion(&adapter->init_done);
4684 adapter->init_done_rc = 0;
4685 ibmvnic_send_crq_init(adapter);
4686 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4687 dev_err(dev, "Initialization sequence timed out\n");
4691 if (adapter->init_done_rc) {
4692 release_crq_queue(adapter);
4693 return adapter->init_done_rc;
4696 if (adapter->from_passive_init) {
4697 adapter->state = VNIC_OPEN;
4698 adapter->from_passive_init = false;
4702 rc = init_sub_crqs(adapter);
4704 dev_err(dev, "Initialization of sub crqs failed\n");
4705 release_crq_queue(adapter);
4709 rc = init_sub_crq_irqs(adapter);
4711 dev_err(dev, "Failed to initialize sub crq irqs\n");
4712 release_crq_queue(adapter);
4718 static struct device_attribute dev_attr_failover;
4720 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4722 struct ibmvnic_adapter *adapter;
4723 struct net_device *netdev;
4724 unsigned char *mac_addr_p;
4727 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4730 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4731 VETH_MAC_ADDR, NULL);
4734 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4735 __FILE__, __LINE__);
4739 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4740 IBMVNIC_MAX_QUEUES);
4744 adapter = netdev_priv(netdev);
4745 adapter->state = VNIC_PROBING;
4746 dev_set_drvdata(&dev->dev, netdev);
4747 adapter->vdev = dev;
4748 adapter->netdev = netdev;
4750 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4751 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4752 netdev->irq = dev->irq;
4753 netdev->netdev_ops = &ibmvnic_netdev_ops;
4754 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4755 SET_NETDEV_DEV(netdev, &dev->dev);
4757 spin_lock_init(&adapter->stats_lock);
4759 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4760 INIT_LIST_HEAD(&adapter->rwi_list);
4761 spin_lock_init(&adapter->rwi_lock);
4762 adapter->resetting = false;
4764 adapter->mac_change_pending = false;
4767 rc = init_crq_queue(adapter);
4769 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4771 goto ibmvnic_init_fail;
4774 rc = ibmvnic_init(adapter);
4775 if (rc && rc != EAGAIN)
4776 goto ibmvnic_init_fail;
4777 } while (rc == EAGAIN);
4779 rc = init_stats_buffers(adapter);
4781 goto ibmvnic_init_fail;
4783 rc = init_stats_token(adapter);
4785 goto ibmvnic_stats_fail;
4787 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4788 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4789 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4791 rc = device_create_file(&dev->dev, &dev_attr_failover);
4793 goto ibmvnic_dev_file_err;
4795 netif_carrier_off(netdev);
4796 rc = register_netdev(netdev);
4798 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4799 goto ibmvnic_register_fail;
4801 dev_info(&dev->dev, "ibmvnic registered\n");
4803 adapter->state = VNIC_PROBED;
4805 adapter->wait_for_reset = false;
4809 ibmvnic_register_fail:
4810 device_remove_file(&dev->dev, &dev_attr_failover);
4812 ibmvnic_dev_file_err:
4813 release_stats_token(adapter);
4816 release_stats_buffers(adapter);
4819 release_sub_crqs(adapter, 1);
4820 release_crq_queue(adapter);
4821 free_netdev(netdev);
4826 static int ibmvnic_remove(struct vio_dev *dev)
4828 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4829 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4831 adapter->state = VNIC_REMOVING;
4833 unregister_netdevice(netdev);
4835 release_resources(adapter);
4836 release_sub_crqs(adapter, 1);
4837 release_crq_queue(adapter);
4839 release_stats_token(adapter);
4840 release_stats_buffers(adapter);
4842 adapter->state = VNIC_REMOVED;
4845 device_remove_file(&dev->dev, &dev_attr_failover);
4846 free_netdev(netdev);
4847 dev_set_drvdata(&dev->dev, NULL);
4852 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4853 const char *buf, size_t count)
4855 struct net_device *netdev = dev_get_drvdata(dev);
4856 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4857 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4858 __be64 session_token;
4861 if (!sysfs_streq(buf, "1"))
4864 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4865 H_GET_SESSION_TOKEN, 0, 0, 0);
4867 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4872 session_token = (__be64)retbuf[0];
4873 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4874 be64_to_cpu(session_token));
4875 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4876 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4878 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4886 static DEVICE_ATTR_WO(failover);
4888 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4890 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4891 struct ibmvnic_adapter *adapter;
4892 struct iommu_table *tbl;
4893 unsigned long ret = 0;
4896 tbl = get_iommu_table_base(&vdev->dev);
4898 /* netdev inits at probe time along with the structures we need below*/
4900 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4902 adapter = netdev_priv(netdev);
4904 ret += PAGE_SIZE; /* the crq message queue */
4905 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4907 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4908 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4910 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4912 ret += adapter->rx_pool[i].size *
4913 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4918 static int ibmvnic_resume(struct device *dev)
4920 struct net_device *netdev = dev_get_drvdata(dev);
4921 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4923 if (adapter->state != VNIC_OPEN)
4926 tasklet_schedule(&adapter->tasklet);
4931 static const struct vio_device_id ibmvnic_device_table[] = {
4932 {"network", "IBM,vnic"},
4935 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4937 static const struct dev_pm_ops ibmvnic_pm_ops = {
4938 .resume = ibmvnic_resume
4941 static struct vio_driver ibmvnic_driver = {
4942 .id_table = ibmvnic_device_table,
4943 .probe = ibmvnic_probe,
4944 .remove = ibmvnic_remove,
4945 .get_desired_dma = ibmvnic_get_desired_dma,
4946 .name = ibmvnic_driver_name,
4947 .pm = &ibmvnic_pm_ops,
4950 /* module functions */
4951 static int __init ibmvnic_module_init(void)
4953 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4954 IBMVNIC_DRIVER_VERSION);
4956 return vio_register_driver(&ibmvnic_driver);
4959 static void __exit ibmvnic_module_exit(void)
4961 vio_unregister_driver(&ibmvnic_driver);
4964 module_init(ibmvnic_module_init);
4965 module_exit(ibmvnic_module_exit);