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>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
81 static const char ibmvnic_driver_name[] = "ibmvnic";
82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84 MODULE_AUTHOR("Santiago Leon");
85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90 static int ibmvnic_remove(struct vio_dev *);
91 static void release_sub_crqs(struct ibmvnic_adapter *);
92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100 static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102 static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static int ibmvnic_poll(struct napi_struct *napi, int data);
109 static void send_map_query(struct ibmvnic_adapter *adapter);
110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
112 static void send_login(struct ibmvnic_adapter *adapter);
113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
114 static int init_sub_crqs(struct ibmvnic_adapter *);
115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
116 static int ibmvnic_init(struct ibmvnic_adapter *);
117 static void release_crq_queue(struct ibmvnic_adapter *);
119 struct ibmvnic_stat {
120 char name[ETH_GSTRING_LEN];
124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
125 offsetof(struct ibmvnic_statistics, stat))
126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
128 static const struct ibmvnic_stat ibmvnic_stats[] = {
129 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
130 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
131 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
132 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
133 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
134 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
135 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
136 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
137 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
138 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
139 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
140 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
141 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
142 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
143 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
144 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
145 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
146 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
147 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
148 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
149 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
150 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
154 unsigned long length, unsigned long *number,
157 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
160 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
168 struct ibmvnic_long_term_buff *ltb, int size)
170 struct device *dev = &adapter->vdev->dev;
173 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
177 dev_err(dev, "Couldn't alloc long term buffer\n");
180 ltb->map_id = adapter->map_id;
183 init_completion(&adapter->fw_done);
184 send_request_map(adapter, ltb->addr,
185 ltb->size, ltb->map_id);
186 wait_for_completion(&adapter->fw_done);
188 if (adapter->fw_done_rc) {
189 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
190 adapter->fw_done_rc);
196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
199 struct device *dev = &adapter->vdev->dev;
204 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
205 adapter->reset_reason != VNIC_RESET_MOBILITY)
206 send_request_unmap(adapter, ltb->map_id);
207 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_long_term_buff *ltb)
213 memset(ltb->buff, 0, ltb->size);
215 init_completion(&adapter->fw_done);
216 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
217 wait_for_completion(&adapter->fw_done);
219 if (adapter->fw_done_rc) {
220 dev_info(&adapter->vdev->dev,
221 "Reset failed, attempting to free and reallocate buffer\n");
222 free_long_term_buff(adapter, ltb);
223 return alloc_long_term_buff(adapter, ltb, ltb->size);
228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
232 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
234 adapter->rx_pool[i].active = 0;
237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
238 struct ibmvnic_rx_pool *pool)
240 int count = pool->size - atomic_read(&pool->available);
241 struct device *dev = &adapter->vdev->dev;
242 int buffers_added = 0;
243 unsigned long lpar_rc;
244 union sub_crq sub_crq;
257 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
258 be32_to_cpu(adapter->login_rsp_buf->
261 for (i = 0; i < count; ++i) {
262 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
264 dev_err(dev, "Couldn't replenish rx buff\n");
265 adapter->replenish_no_mem++;
269 index = pool->free_map[pool->next_free];
271 if (pool->rx_buff[index].skb)
272 dev_err(dev, "Inconsistent free_map!\n");
274 /* Copy the skb to the long term mapped DMA buffer */
275 offset = index * pool->buff_size;
276 dst = pool->long_term_buff.buff + offset;
277 memset(dst, 0, pool->buff_size);
278 dma_addr = pool->long_term_buff.addr + offset;
279 pool->rx_buff[index].data = dst;
281 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
282 pool->rx_buff[index].dma = dma_addr;
283 pool->rx_buff[index].skb = skb;
284 pool->rx_buff[index].pool_index = pool->index;
285 pool->rx_buff[index].size = pool->buff_size;
287 memset(&sub_crq, 0, sizeof(sub_crq));
288 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
289 sub_crq.rx_add.correlator =
290 cpu_to_be64((u64)&pool->rx_buff[index]);
291 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
292 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
294 /* The length field of the sCRQ is defined to be 24 bits so the
295 * buffer size needs to be left shifted by a byte before it is
296 * converted to big endian to prevent the last byte from being
299 #ifdef __LITTLE_ENDIAN__
302 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
304 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
306 if (lpar_rc != H_SUCCESS)
310 adapter->replenish_add_buff_success++;
311 pool->next_free = (pool->next_free + 1) % pool->size;
313 atomic_add(buffers_added, &pool->available);
317 dev_info(dev, "replenish pools failure\n");
318 pool->free_map[pool->next_free] = index;
319 pool->rx_buff[index].skb = NULL;
320 if (!dma_mapping_error(dev, dma_addr))
321 dma_unmap_single(dev, dma_addr, pool->buff_size,
324 dev_kfree_skb_any(skb);
325 adapter->replenish_add_buff_failure++;
326 atomic_add(buffers_added, &pool->available);
328 if (lpar_rc == H_CLOSED) {
329 /* Disable buffer pool replenishment and report carrier off if
330 * queue is closed. Firmware guarantees that a signal will
331 * be sent to the driver, triggering a reset.
333 deactivate_rx_pools(adapter);
334 netif_carrier_off(adapter->netdev);
338 static void replenish_pools(struct ibmvnic_adapter *adapter)
342 adapter->replenish_task_cycles++;
343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
345 if (adapter->rx_pool[i].active)
346 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
352 kfree(adapter->tx_stats_buffers);
353 kfree(adapter->rx_stats_buffers);
356 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
358 adapter->tx_stats_buffers =
359 kcalloc(adapter->req_tx_queues,
360 sizeof(struct ibmvnic_tx_queue_stats),
362 if (!adapter->tx_stats_buffers)
365 adapter->rx_stats_buffers =
366 kcalloc(adapter->req_rx_queues,
367 sizeof(struct ibmvnic_rx_queue_stats),
369 if (!adapter->rx_stats_buffers)
375 static void release_stats_token(struct ibmvnic_adapter *adapter)
377 struct device *dev = &adapter->vdev->dev;
379 if (!adapter->stats_token)
382 dma_unmap_single(dev, adapter->stats_token,
383 sizeof(struct ibmvnic_statistics),
385 adapter->stats_token = 0;
388 static int init_stats_token(struct ibmvnic_adapter *adapter)
390 struct device *dev = &adapter->vdev->dev;
393 stok = dma_map_single(dev, &adapter->stats,
394 sizeof(struct ibmvnic_statistics),
396 if (dma_mapping_error(dev, stok)) {
397 dev_err(dev, "Couldn't map stats buffer\n");
401 adapter->stats_token = stok;
402 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
406 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
408 struct ibmvnic_rx_pool *rx_pool;
412 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
413 for (i = 0; i < rx_scrqs; i++) {
414 rx_pool = &adapter->rx_pool[i];
416 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
418 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
422 for (j = 0; j < rx_pool->size; j++)
423 rx_pool->free_map[j] = j;
425 memset(rx_pool->rx_buff, 0,
426 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
428 atomic_set(&rx_pool->available, 0);
429 rx_pool->next_alloc = 0;
430 rx_pool->next_free = 0;
437 static void release_rx_pools(struct ibmvnic_adapter *adapter)
439 struct ibmvnic_rx_pool *rx_pool;
443 if (!adapter->rx_pool)
446 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
447 for (i = 0; i < rx_scrqs; i++) {
448 rx_pool = &adapter->rx_pool[i];
450 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
452 kfree(rx_pool->free_map);
453 free_long_term_buff(adapter, &rx_pool->long_term_buff);
455 if (!rx_pool->rx_buff)
458 for (j = 0; j < rx_pool->size; j++) {
459 if (rx_pool->rx_buff[j].skb) {
460 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
461 rx_pool->rx_buff[i].skb = NULL;
465 kfree(rx_pool->rx_buff);
468 kfree(adapter->rx_pool);
469 adapter->rx_pool = NULL;
472 static int init_rx_pools(struct net_device *netdev)
474 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
475 struct device *dev = &adapter->vdev->dev;
476 struct ibmvnic_rx_pool *rx_pool;
482 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
483 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
484 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
486 adapter->rx_pool = kcalloc(rxadd_subcrqs,
487 sizeof(struct ibmvnic_rx_pool),
489 if (!adapter->rx_pool) {
490 dev_err(dev, "Failed to allocate rx pools\n");
494 for (i = 0; i < rxadd_subcrqs; i++) {
495 rx_pool = &adapter->rx_pool[i];
497 netdev_dbg(adapter->netdev,
498 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
499 i, adapter->req_rx_add_entries_per_subcrq,
500 be64_to_cpu(size_array[i]));
502 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
504 rx_pool->buff_size = be64_to_cpu(size_array[i]);
507 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
509 if (!rx_pool->free_map) {
510 release_rx_pools(adapter);
514 rx_pool->rx_buff = kcalloc(rx_pool->size,
515 sizeof(struct ibmvnic_rx_buff),
517 if (!rx_pool->rx_buff) {
518 dev_err(dev, "Couldn't alloc rx buffers\n");
519 release_rx_pools(adapter);
523 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
524 rx_pool->size * rx_pool->buff_size)) {
525 release_rx_pools(adapter);
529 for (j = 0; j < rx_pool->size; ++j)
530 rx_pool->free_map[j] = j;
532 atomic_set(&rx_pool->available, 0);
533 rx_pool->next_alloc = 0;
534 rx_pool->next_free = 0;
540 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
542 struct ibmvnic_tx_pool *tx_pool;
546 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 for (i = 0; i < tx_scrqs; i++) {
548 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
550 tx_pool = &adapter->tx_pool[i];
552 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
556 memset(tx_pool->tx_buff, 0,
557 adapter->req_tx_entries_per_subcrq *
558 sizeof(struct ibmvnic_tx_buff));
560 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
561 tx_pool->free_map[j] = j;
563 tx_pool->consumer_index = 0;
564 tx_pool->producer_index = 0;
570 static void release_tx_pools(struct ibmvnic_adapter *adapter)
572 struct ibmvnic_tx_pool *tx_pool;
575 if (!adapter->tx_pool)
578 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
579 for (i = 0; i < tx_scrqs; i++) {
580 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
581 tx_pool = &adapter->tx_pool[i];
582 kfree(tx_pool->tx_buff);
583 free_long_term_buff(adapter, &tx_pool->long_term_buff);
584 kfree(tx_pool->free_map);
587 kfree(adapter->tx_pool);
588 adapter->tx_pool = NULL;
591 static int init_tx_pools(struct net_device *netdev)
593 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
594 struct device *dev = &adapter->vdev->dev;
595 struct ibmvnic_tx_pool *tx_pool;
599 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
600 adapter->tx_pool = kcalloc(tx_subcrqs,
601 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
602 if (!adapter->tx_pool)
605 for (i = 0; i < tx_subcrqs; i++) {
606 tx_pool = &adapter->tx_pool[i];
608 netdev_dbg(adapter->netdev,
609 "Initializing tx_pool[%d], %lld buffs\n",
610 i, adapter->req_tx_entries_per_subcrq);
612 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
613 sizeof(struct ibmvnic_tx_buff),
615 if (!tx_pool->tx_buff) {
616 dev_err(dev, "tx pool buffer allocation failed\n");
617 release_tx_pools(adapter);
621 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
622 adapter->req_tx_entries_per_subcrq *
624 release_tx_pools(adapter);
628 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
629 sizeof(int), GFP_KERNEL);
630 if (!tx_pool->free_map) {
631 release_tx_pools(adapter);
635 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
636 tx_pool->free_map[j] = j;
638 tx_pool->consumer_index = 0;
639 tx_pool->producer_index = 0;
645 static void release_error_buffers(struct ibmvnic_adapter *adapter)
647 struct device *dev = &adapter->vdev->dev;
648 struct ibmvnic_error_buff *error_buff, *tmp;
651 spin_lock_irqsave(&adapter->error_list_lock, flags);
652 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
653 list_del(&error_buff->list);
654 dma_unmap_single(dev, error_buff->dma, error_buff->len,
656 kfree(error_buff->buff);
659 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
662 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
666 if (adapter->napi_enabled)
669 for (i = 0; i < adapter->req_rx_queues; i++)
670 napi_enable(&adapter->napi[i]);
672 adapter->napi_enabled = true;
675 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
679 if (!adapter->napi_enabled)
682 for (i = 0; i < adapter->req_rx_queues; i++) {
683 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
684 napi_disable(&adapter->napi[i]);
687 adapter->napi_enabled = false;
690 static int ibmvnic_login(struct net_device *netdev)
692 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
693 unsigned long timeout = msecs_to_jiffies(30000);
694 struct device *dev = &adapter->vdev->dev;
698 if (adapter->renegotiate) {
699 adapter->renegotiate = false;
700 release_sub_crqs(adapter);
702 reinit_completion(&adapter->init_done);
703 send_cap_queries(adapter);
704 if (!wait_for_completion_timeout(&adapter->init_done,
706 dev_err(dev, "Capabilities query timeout\n");
709 rc = init_sub_crqs(adapter);
712 "Initialization of SCRQ's failed\n");
715 rc = init_sub_crq_irqs(adapter);
718 "Initialization of SCRQ's irqs failed\n");
723 reinit_completion(&adapter->init_done);
725 if (!wait_for_completion_timeout(&adapter->init_done,
727 dev_err(dev, "Login timeout\n");
730 } while (adapter->renegotiate);
735 static void release_resources(struct ibmvnic_adapter *adapter)
739 release_tx_pools(adapter);
740 release_rx_pools(adapter);
742 release_stats_token(adapter);
743 release_stats_buffers(adapter);
744 release_error_buffers(adapter);
747 for (i = 0; i < adapter->req_rx_queues; i++) {
748 if (&adapter->napi[i]) {
749 netdev_dbg(adapter->netdev,
750 "Releasing napi[%d]\n", i);
751 netif_napi_del(&adapter->napi[i]);
757 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
759 struct net_device *netdev = adapter->netdev;
760 unsigned long timeout = msecs_to_jiffies(30000);
761 union ibmvnic_crq crq;
765 netdev_dbg(netdev, "setting link state %d\n", link_state);
767 memset(&crq, 0, sizeof(crq));
768 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
769 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
770 crq.logical_link_state.link_state = link_state;
775 reinit_completion(&adapter->init_done);
776 rc = ibmvnic_send_crq(adapter, &crq);
778 netdev_err(netdev, "Failed to set link state\n");
782 if (!wait_for_completion_timeout(&adapter->init_done,
784 netdev_err(netdev, "timeout setting link state\n");
788 if (adapter->init_done_rc == 1) {
789 /* Partuial success, delay and re-send */
798 static int set_real_num_queues(struct net_device *netdev)
800 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
803 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
804 adapter->req_tx_queues, adapter->req_rx_queues);
806 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
808 netdev_err(netdev, "failed to set the number of tx queues\n");
812 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
814 netdev_err(netdev, "failed to set the number of rx queues\n");
819 static int init_resources(struct ibmvnic_adapter *adapter)
821 struct net_device *netdev = adapter->netdev;
824 rc = set_real_num_queues(netdev);
828 rc = init_stats_buffers(adapter);
832 rc = init_stats_token(adapter);
837 adapter->napi = kcalloc(adapter->req_rx_queues,
838 sizeof(struct napi_struct), GFP_KERNEL);
842 for (i = 0; i < adapter->req_rx_queues; i++) {
843 netdev_dbg(netdev, "Adding napi[%d]\n", i);
844 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
848 send_map_query(adapter);
850 rc = init_rx_pools(netdev);
854 rc = init_tx_pools(netdev);
858 static int __ibmvnic_open(struct net_device *netdev)
860 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
861 enum vnic_state prev_state = adapter->state;
864 adapter->state = VNIC_OPENING;
865 replenish_pools(adapter);
866 ibmvnic_napi_enable(adapter);
868 /* We're ready to receive frames, enable the sub-crq interrupts and
869 * set the logical link state to up
871 for (i = 0; i < adapter->req_rx_queues; i++) {
872 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
873 if (prev_state == VNIC_CLOSED)
874 enable_irq(adapter->rx_scrq[i]->irq);
876 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
879 for (i = 0; i < adapter->req_tx_queues; i++) {
880 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
881 if (prev_state == VNIC_CLOSED)
882 enable_irq(adapter->tx_scrq[i]->irq);
884 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
887 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
889 for (i = 0; i < adapter->req_rx_queues; i++)
890 napi_disable(&adapter->napi[i]);
891 release_resources(adapter);
895 netif_tx_start_all_queues(netdev);
897 if (prev_state == VNIC_CLOSED) {
898 for (i = 0; i < adapter->req_rx_queues; i++)
899 napi_schedule(&adapter->napi[i]);
902 adapter->state = VNIC_OPEN;
906 static int ibmvnic_open(struct net_device *netdev)
908 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
911 mutex_lock(&adapter->reset_lock);
913 if (adapter->state != VNIC_CLOSED) {
914 rc = ibmvnic_login(netdev);
916 mutex_unlock(&adapter->reset_lock);
920 rc = init_resources(adapter);
922 netdev_err(netdev, "failed to initialize resources\n");
923 release_resources(adapter);
924 mutex_unlock(&adapter->reset_lock);
929 rc = __ibmvnic_open(netdev);
930 mutex_unlock(&adapter->reset_lock);
935 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
937 struct ibmvnic_tx_pool *tx_pool;
942 if (!adapter->tx_pool)
945 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
946 tx_entries = adapter->req_tx_entries_per_subcrq;
948 /* Free any remaining skbs in the tx buffer pools */
949 for (i = 0; i < tx_scrqs; i++) {
950 tx_pool = &adapter->tx_pool[i];
954 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
955 for (j = 0; j < tx_entries; j++) {
956 if (tx_pool->tx_buff[j].skb) {
957 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
958 tx_pool->tx_buff[j].skb = NULL;
964 static int __ibmvnic_close(struct net_device *netdev)
966 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
970 adapter->state = VNIC_CLOSING;
972 /* ensure that transmissions are stopped if called by do_reset */
973 if (adapter->resetting)
974 netif_tx_disable(netdev);
976 netif_tx_stop_all_queues(netdev);
978 ibmvnic_napi_disable(adapter);
980 if (adapter->tx_scrq) {
981 for (i = 0; i < adapter->req_tx_queues; i++)
982 if (adapter->tx_scrq[i]->irq) {
983 netdev_dbg(adapter->netdev,
984 "Disabling tx_scrq[%d] irq\n", i);
985 disable_irq(adapter->tx_scrq[i]->irq);
989 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
993 if (adapter->rx_scrq) {
994 for (i = 0; i < adapter->req_rx_queues; i++) {
997 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1005 if (adapter->rx_scrq[i]->irq) {
1006 netdev_dbg(adapter->netdev,
1007 "Disabling rx_scrq[%d] irq\n", i);
1008 disable_irq(adapter->rx_scrq[i]->irq);
1013 clean_tx_pools(adapter);
1014 adapter->state = VNIC_CLOSED;
1018 static int ibmvnic_close(struct net_device *netdev)
1020 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1023 mutex_lock(&adapter->reset_lock);
1024 rc = __ibmvnic_close(netdev);
1025 mutex_unlock(&adapter->reset_lock);
1031 * build_hdr_data - creates L2/L3/L4 header data buffer
1032 * @hdr_field - bitfield determining needed headers
1033 * @skb - socket buffer
1034 * @hdr_len - array of header lengths
1035 * @tot_len - total length of data
1037 * Reads hdr_field to determine which headers are needed by firmware.
1038 * Builds a buffer containing these headers. Saves individual header
1039 * lengths and total buffer length to be used to build descriptors.
1041 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1042 int *hdr_len, u8 *hdr_data)
1047 hdr_len[0] = sizeof(struct ethhdr);
1049 if (skb->protocol == htons(ETH_P_IP)) {
1050 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1051 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1052 hdr_len[2] = tcp_hdrlen(skb);
1053 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1054 hdr_len[2] = sizeof(struct udphdr);
1055 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1056 hdr_len[1] = sizeof(struct ipv6hdr);
1057 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1058 hdr_len[2] = tcp_hdrlen(skb);
1059 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1060 hdr_len[2] = sizeof(struct udphdr);
1063 memset(hdr_data, 0, 120);
1064 if ((hdr_field >> 6) & 1) {
1065 hdr = skb_mac_header(skb);
1066 memcpy(hdr_data, hdr, hdr_len[0]);
1070 if ((hdr_field >> 5) & 1) {
1071 hdr = skb_network_header(skb);
1072 memcpy(hdr_data + len, hdr, hdr_len[1]);
1076 if ((hdr_field >> 4) & 1) {
1077 hdr = skb_transport_header(skb);
1078 memcpy(hdr_data + len, hdr, hdr_len[2]);
1085 * create_hdr_descs - create header and header extension descriptors
1086 * @hdr_field - bitfield determining needed headers
1087 * @data - buffer containing header data
1088 * @len - length of data buffer
1089 * @hdr_len - array of individual header lengths
1090 * @scrq_arr - descriptor array
1092 * Creates header and, if needed, header extension descriptors and
1093 * places them in a descriptor array, scrq_arr
1096 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1097 union sub_crq *scrq_arr)
1099 union sub_crq hdr_desc;
1104 while (tmp_len > 0) {
1105 cur = hdr_data + len - tmp_len;
1107 memset(&hdr_desc, 0, sizeof(hdr_desc));
1108 if (cur != hdr_data) {
1109 data = hdr_desc.hdr_ext.data;
1110 tmp = tmp_len > 29 ? 29 : tmp_len;
1111 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1112 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1113 hdr_desc.hdr_ext.len = tmp;
1115 data = hdr_desc.hdr.data;
1116 tmp = tmp_len > 24 ? 24 : tmp_len;
1117 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1118 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1119 hdr_desc.hdr.len = tmp;
1120 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1121 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1122 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1123 hdr_desc.hdr.flag = hdr_field << 1;
1125 memcpy(data, cur, tmp);
1127 *scrq_arr = hdr_desc;
1133 * build_hdr_descs_arr - build a header descriptor array
1134 * @skb - socket buffer
1135 * @num_entries - number of descriptors to be sent
1136 * @subcrq - first TX descriptor
1137 * @hdr_field - bit field determining which headers will be sent
1139 * This function will build a TX descriptor array with applicable
1140 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1143 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1144 int *num_entries, u8 hdr_field)
1146 int hdr_len[3] = {0, 0, 0};
1148 u8 *hdr_data = txbuff->hdr_data;
1150 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1155 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1156 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1157 txbuff->indir_arr + 1);
1160 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1162 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1163 int queue_num = skb_get_queue_mapping(skb);
1164 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1165 struct device *dev = &adapter->vdev->dev;
1166 struct ibmvnic_tx_buff *tx_buff = NULL;
1167 struct ibmvnic_sub_crq_queue *tx_scrq;
1168 struct ibmvnic_tx_pool *tx_pool;
1169 unsigned int tx_send_failed = 0;
1170 unsigned int tx_map_failed = 0;
1171 unsigned int tx_dropped = 0;
1172 unsigned int tx_packets = 0;
1173 unsigned int tx_bytes = 0;
1174 dma_addr_t data_dma_addr;
1175 struct netdev_queue *txq;
1176 unsigned long lpar_rc;
1177 union sub_crq tx_crq;
1178 unsigned int offset;
1179 int num_entries = 1;
1185 if (adapter->resetting) {
1186 if (!netif_subqueue_stopped(netdev, skb))
1187 netif_stop_subqueue(netdev, queue_num);
1188 dev_kfree_skb_any(skb);
1196 tx_pool = &adapter->tx_pool[queue_num];
1197 tx_scrq = adapter->tx_scrq[queue_num];
1198 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1199 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1200 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1202 index = tx_pool->free_map[tx_pool->consumer_index];
1203 offset = index * adapter->req_mtu;
1204 dst = tx_pool->long_term_buff.buff + offset;
1205 memset(dst, 0, adapter->req_mtu);
1206 skb_copy_from_linear_data(skb, dst, skb->len);
1207 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1209 tx_pool->consumer_index =
1210 (tx_pool->consumer_index + 1) %
1211 adapter->req_tx_entries_per_subcrq;
1213 tx_buff = &tx_pool->tx_buff[index];
1215 tx_buff->data_dma[0] = data_dma_addr;
1216 tx_buff->data_len[0] = skb->len;
1217 tx_buff->index = index;
1218 tx_buff->pool_index = queue_num;
1219 tx_buff->last_frag = true;
1221 memset(&tx_crq, 0, sizeof(tx_crq));
1222 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1223 tx_crq.v1.type = IBMVNIC_TX_DESC;
1224 tx_crq.v1.n_crq_elem = 1;
1225 tx_crq.v1.n_sge = 1;
1226 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1227 tx_crq.v1.correlator = cpu_to_be32(index);
1228 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1229 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1230 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1232 if (adapter->vlan_header_insertion) {
1233 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1234 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1237 if (skb->protocol == htons(ETH_P_IP)) {
1238 if (ip_hdr(skb)->version == 4)
1239 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1240 else if (ip_hdr(skb)->version == 6)
1241 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1243 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1244 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1245 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1246 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1249 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1250 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1253 /* determine if l2/3/4 headers are sent to firmware */
1254 if ((*hdrs >> 7) & 1 &&
1255 (skb->protocol == htons(ETH_P_IP) ||
1256 skb->protocol == htons(ETH_P_IPV6))) {
1257 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1258 tx_crq.v1.n_crq_elem = num_entries;
1259 tx_buff->indir_arr[0] = tx_crq;
1260 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1261 sizeof(tx_buff->indir_arr),
1263 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1264 dev_kfree_skb_any(skb);
1265 tx_buff->skb = NULL;
1266 if (!firmware_has_feature(FW_FEATURE_CMO))
1267 dev_err(dev, "tx: unable to map descriptor array\n");
1273 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1274 (u64)tx_buff->indir_dma,
1277 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1280 if (lpar_rc != H_SUCCESS) {
1281 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1283 if (tx_pool->consumer_index == 0)
1284 tx_pool->consumer_index =
1285 adapter->req_tx_entries_per_subcrq - 1;
1287 tx_pool->consumer_index--;
1289 dev_kfree_skb_any(skb);
1290 tx_buff->skb = NULL;
1292 if (lpar_rc == H_CLOSED) {
1293 /* Disable TX and report carrier off if queue is closed.
1294 * Firmware guarantees that a signal will be sent to the
1295 * driver, triggering a reset or some other action.
1297 netif_tx_stop_all_queues(netdev);
1298 netif_carrier_off(netdev);
1307 if (atomic_inc_return(&tx_scrq->used)
1308 >= adapter->req_tx_entries_per_subcrq) {
1309 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1310 netif_stop_subqueue(netdev, queue_num);
1314 tx_bytes += skb->len;
1315 txq->trans_start = jiffies;
1319 netdev->stats.tx_dropped += tx_dropped;
1320 netdev->stats.tx_bytes += tx_bytes;
1321 netdev->stats.tx_packets += tx_packets;
1322 adapter->tx_send_failed += tx_send_failed;
1323 adapter->tx_map_failed += tx_map_failed;
1324 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1325 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1326 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1331 static void ibmvnic_set_multi(struct net_device *netdev)
1333 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1334 struct netdev_hw_addr *ha;
1335 union ibmvnic_crq crq;
1337 memset(&crq, 0, sizeof(crq));
1338 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1339 crq.request_capability.cmd = REQUEST_CAPABILITY;
1341 if (netdev->flags & IFF_PROMISC) {
1342 if (!adapter->promisc_supported)
1345 if (netdev->flags & IFF_ALLMULTI) {
1346 /* Accept all multicast */
1347 memset(&crq, 0, sizeof(crq));
1348 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1349 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1350 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1351 ibmvnic_send_crq(adapter, &crq);
1352 } else if (netdev_mc_empty(netdev)) {
1353 /* Reject all multicast */
1354 memset(&crq, 0, sizeof(crq));
1355 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1356 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1357 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1358 ibmvnic_send_crq(adapter, &crq);
1360 /* Accept one or more multicast(s) */
1361 netdev_for_each_mc_addr(ha, netdev) {
1362 memset(&crq, 0, sizeof(crq));
1363 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1364 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1365 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1366 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1368 ibmvnic_send_crq(adapter, &crq);
1374 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1376 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1377 struct sockaddr *addr = p;
1378 union ibmvnic_crq crq;
1380 if (!is_valid_ether_addr(addr->sa_data))
1381 return -EADDRNOTAVAIL;
1383 memset(&crq, 0, sizeof(crq));
1384 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1385 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1386 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1387 ibmvnic_send_crq(adapter, &crq);
1388 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1393 * do_reset returns zero if we are able to keep processing reset events, or
1394 * non-zero if we hit a fatal error and must halt.
1396 static int do_reset(struct ibmvnic_adapter *adapter,
1397 struct ibmvnic_rwi *rwi, u32 reset_state)
1399 struct net_device *netdev = adapter->netdev;
1402 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1405 netif_carrier_off(netdev);
1406 adapter->reset_reason = rwi->reset_reason;
1408 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1409 rc = ibmvnic_reenable_crq_queue(adapter);
1414 rc = __ibmvnic_close(netdev);
1418 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1419 /* remove the closed state so when we call open it appears
1420 * we are coming from the probed state.
1422 adapter->state = VNIC_PROBED;
1424 rc = ibmvnic_init(adapter);
1428 /* If the adapter was in PROBE state prior to the reset,
1431 if (reset_state == VNIC_PROBED)
1434 rc = ibmvnic_login(netdev);
1436 adapter->state = VNIC_PROBED;
1440 rc = reset_tx_pools(adapter);
1444 rc = reset_rx_pools(adapter);
1448 if (reset_state == VNIC_CLOSED)
1452 rc = __ibmvnic_open(netdev);
1454 if (list_empty(&adapter->rwi_list))
1455 adapter->state = VNIC_CLOSED;
1457 adapter->state = reset_state;
1462 netif_carrier_on(netdev);
1465 for (i = 0; i < adapter->req_rx_queues; i++)
1466 napi_schedule(&adapter->napi[i]);
1468 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1469 netdev_notify_peers(netdev);
1474 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1476 struct ibmvnic_rwi *rwi;
1478 mutex_lock(&adapter->rwi_lock);
1480 if (!list_empty(&adapter->rwi_list)) {
1481 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1483 list_del(&rwi->list);
1488 mutex_unlock(&adapter->rwi_lock);
1492 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1494 struct ibmvnic_rwi *rwi;
1496 rwi = get_next_rwi(adapter);
1499 rwi = get_next_rwi(adapter);
1503 static void __ibmvnic_reset(struct work_struct *work)
1505 struct ibmvnic_rwi *rwi;
1506 struct ibmvnic_adapter *adapter;
1507 struct net_device *netdev;
1511 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1512 netdev = adapter->netdev;
1514 mutex_lock(&adapter->reset_lock);
1515 adapter->resetting = true;
1516 reset_state = adapter->state;
1518 rwi = get_next_rwi(adapter);
1520 rc = do_reset(adapter, rwi, reset_state);
1525 rwi = get_next_rwi(adapter);
1529 netdev_dbg(adapter->netdev, "Reset failed\n");
1530 free_all_rwi(adapter);
1531 mutex_unlock(&adapter->reset_lock);
1535 adapter->resetting = false;
1536 mutex_unlock(&adapter->reset_lock);
1539 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1540 enum ibmvnic_reset_reason reason)
1542 struct ibmvnic_rwi *rwi, *tmp;
1543 struct net_device *netdev = adapter->netdev;
1544 struct list_head *entry;
1546 if (adapter->state == VNIC_REMOVING ||
1547 adapter->state == VNIC_REMOVED) {
1548 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1552 if (adapter->state == VNIC_PROBING) {
1553 netdev_warn(netdev, "Adapter reset during probe\n");
1554 adapter->init_done_rc = EAGAIN;
1558 mutex_lock(&adapter->rwi_lock);
1560 list_for_each(entry, &adapter->rwi_list) {
1561 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1562 if (tmp->reset_reason == reason) {
1563 netdev_dbg(netdev, "Skipping matching reset\n");
1564 mutex_unlock(&adapter->rwi_lock);
1569 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1571 mutex_unlock(&adapter->rwi_lock);
1572 ibmvnic_close(netdev);
1576 rwi->reset_reason = reason;
1577 list_add_tail(&rwi->list, &adapter->rwi_list);
1578 mutex_unlock(&adapter->rwi_lock);
1580 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1581 schedule_work(&adapter->ibmvnic_reset);
1584 static void ibmvnic_tx_timeout(struct net_device *dev)
1586 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1588 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1591 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1592 struct ibmvnic_rx_buff *rx_buff)
1594 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1596 rx_buff->skb = NULL;
1598 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1599 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1601 atomic_dec(&pool->available);
1604 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1606 struct net_device *netdev = napi->dev;
1607 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1608 int scrq_num = (int)(napi - adapter->napi);
1609 int frames_processed = 0;
1612 while (frames_processed < budget) {
1613 struct sk_buff *skb;
1614 struct ibmvnic_rx_buff *rx_buff;
1615 union sub_crq *next;
1620 if (unlikely(adapter->resetting)) {
1621 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1622 napi_complete_done(napi, frames_processed);
1623 return frames_processed;
1626 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1628 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1630 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1631 rx_comp.correlator);
1632 /* do error checking */
1633 if (next->rx_comp.rc) {
1634 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1635 be16_to_cpu(next->rx_comp.rc));
1636 /* free the entry */
1637 next->rx_comp.first = 0;
1638 remove_buff_from_pool(adapter, rx_buff);
1642 length = be32_to_cpu(next->rx_comp.len);
1643 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1644 flags = next->rx_comp.flags;
1646 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1649 /* VLAN Header has been stripped by the system firmware and
1650 * needs to be inserted by the driver
1652 if (adapter->rx_vlan_header_insertion &&
1653 (flags & IBMVNIC_VLAN_STRIPPED))
1654 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1655 ntohs(next->rx_comp.vlan_tci));
1657 /* free the entry */
1658 next->rx_comp.first = 0;
1659 remove_buff_from_pool(adapter, rx_buff);
1661 skb_put(skb, length);
1662 skb->protocol = eth_type_trans(skb, netdev);
1663 skb_record_rx_queue(skb, scrq_num);
1665 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1666 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1667 skb->ip_summed = CHECKSUM_UNNECESSARY;
1671 napi_gro_receive(napi, skb); /* send it up */
1672 netdev->stats.rx_packets++;
1673 netdev->stats.rx_bytes += length;
1674 adapter->rx_stats_buffers[scrq_num].packets++;
1675 adapter->rx_stats_buffers[scrq_num].bytes += length;
1679 if (adapter->state != VNIC_CLOSING)
1680 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1682 if (frames_processed < budget) {
1683 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1684 napi_complete_done(napi, frames_processed);
1685 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1686 napi_reschedule(napi)) {
1687 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1691 return frames_processed;
1694 #ifdef CONFIG_NET_POLL_CONTROLLER
1695 static void ibmvnic_netpoll_controller(struct net_device *dev)
1697 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1700 replenish_pools(netdev_priv(dev));
1701 for (i = 0; i < adapter->req_rx_queues; i++)
1702 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1703 adapter->rx_scrq[i]);
1707 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1712 static const struct net_device_ops ibmvnic_netdev_ops = {
1713 .ndo_open = ibmvnic_open,
1714 .ndo_stop = ibmvnic_close,
1715 .ndo_start_xmit = ibmvnic_xmit,
1716 .ndo_set_rx_mode = ibmvnic_set_multi,
1717 .ndo_set_mac_address = ibmvnic_set_mac,
1718 .ndo_validate_addr = eth_validate_addr,
1719 .ndo_tx_timeout = ibmvnic_tx_timeout,
1720 #ifdef CONFIG_NET_POLL_CONTROLLER
1721 .ndo_poll_controller = ibmvnic_netpoll_controller,
1723 .ndo_change_mtu = ibmvnic_change_mtu,
1726 /* ethtool functions */
1728 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1729 struct ethtool_link_ksettings *cmd)
1731 u32 supported, advertising;
1733 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1735 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1737 cmd->base.speed = SPEED_1000;
1738 cmd->base.duplex = DUPLEX_FULL;
1739 cmd->base.port = PORT_FIBRE;
1740 cmd->base.phy_address = 0;
1741 cmd->base.autoneg = AUTONEG_ENABLE;
1743 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1745 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1751 static void ibmvnic_get_drvinfo(struct net_device *dev,
1752 struct ethtool_drvinfo *info)
1754 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1755 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1758 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1760 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1762 return adapter->msg_enable;
1765 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1767 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1769 adapter->msg_enable = data;
1772 static u32 ibmvnic_get_link(struct net_device *netdev)
1774 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1776 /* Don't need to send a query because we request a logical link up at
1777 * init and then we wait for link state indications
1779 return adapter->logical_link_state;
1782 static void ibmvnic_get_ringparam(struct net_device *netdev,
1783 struct ethtool_ringparam *ring)
1785 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1787 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
1788 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
1789 ring->rx_mini_max_pending = 0;
1790 ring->rx_jumbo_max_pending = 0;
1791 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
1792 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
1793 ring->rx_mini_pending = 0;
1794 ring->rx_jumbo_pending = 0;
1797 static void ibmvnic_get_channels(struct net_device *netdev,
1798 struct ethtool_channels *channels)
1800 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1802 channels->max_rx = adapter->max_rx_queues;
1803 channels->max_tx = adapter->max_tx_queues;
1804 channels->max_other = 0;
1805 channels->max_combined = 0;
1806 channels->rx_count = adapter->req_rx_queues;
1807 channels->tx_count = adapter->req_tx_queues;
1808 channels->other_count = 0;
1809 channels->combined_count = 0;
1812 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1814 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1817 if (stringset != ETH_SS_STATS)
1820 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1821 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1823 for (i = 0; i < adapter->req_tx_queues; i++) {
1824 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
1825 data += ETH_GSTRING_LEN;
1827 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
1828 data += ETH_GSTRING_LEN;
1830 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
1831 data += ETH_GSTRING_LEN;
1834 for (i = 0; i < adapter->req_rx_queues; i++) {
1835 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
1836 data += ETH_GSTRING_LEN;
1838 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
1839 data += ETH_GSTRING_LEN;
1841 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
1842 data += ETH_GSTRING_LEN;
1846 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1848 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1852 return ARRAY_SIZE(ibmvnic_stats) +
1853 adapter->req_tx_queues * NUM_TX_STATS +
1854 adapter->req_rx_queues * NUM_RX_STATS;
1860 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1861 struct ethtool_stats *stats, u64 *data)
1863 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1864 union ibmvnic_crq crq;
1867 memset(&crq, 0, sizeof(crq));
1868 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1869 crq.request_statistics.cmd = REQUEST_STATISTICS;
1870 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1871 crq.request_statistics.len =
1872 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1874 /* Wait for data to be written */
1875 init_completion(&adapter->stats_done);
1876 ibmvnic_send_crq(adapter, &crq);
1877 wait_for_completion(&adapter->stats_done);
1879 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1880 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
1881 ibmvnic_stats[i].offset));
1883 for (j = 0; j < adapter->req_tx_queues; j++) {
1884 data[i] = adapter->tx_stats_buffers[j].packets;
1886 data[i] = adapter->tx_stats_buffers[j].bytes;
1888 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
1892 for (j = 0; j < adapter->req_rx_queues; j++) {
1893 data[i] = adapter->rx_stats_buffers[j].packets;
1895 data[i] = adapter->rx_stats_buffers[j].bytes;
1897 data[i] = adapter->rx_stats_buffers[j].interrupts;
1902 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1903 .get_drvinfo = ibmvnic_get_drvinfo,
1904 .get_msglevel = ibmvnic_get_msglevel,
1905 .set_msglevel = ibmvnic_set_msglevel,
1906 .get_link = ibmvnic_get_link,
1907 .get_ringparam = ibmvnic_get_ringparam,
1908 .get_channels = ibmvnic_get_channels,
1909 .get_strings = ibmvnic_get_strings,
1910 .get_sset_count = ibmvnic_get_sset_count,
1911 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1912 .get_link_ksettings = ibmvnic_get_link_ksettings,
1915 /* Routines for managing CRQs/sCRQs */
1917 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1918 struct ibmvnic_sub_crq_queue *scrq)
1923 free_irq(scrq->irq, scrq);
1924 irq_dispose_mapping(scrq->irq);
1928 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1931 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1932 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1936 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1940 for (i = 0; i < adapter->req_tx_queues; i++) {
1941 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
1942 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1947 for (i = 0; i < adapter->req_rx_queues; i++) {
1948 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
1949 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1957 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1958 struct ibmvnic_sub_crq_queue *scrq)
1960 struct device *dev = &adapter->vdev->dev;
1963 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1965 /* Close the sub-crqs */
1967 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1968 adapter->vdev->unit_address,
1970 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1973 netdev_err(adapter->netdev,
1974 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1978 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1980 free_pages((unsigned long)scrq->msgs, 2);
1984 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1987 struct device *dev = &adapter->vdev->dev;
1988 struct ibmvnic_sub_crq_queue *scrq;
1991 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1996 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1998 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1999 goto zero_page_failed;
2002 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2004 if (dma_mapping_error(dev, scrq->msg_token)) {
2005 dev_warn(dev, "Couldn't map crq queue messages page\n");
2009 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2010 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2012 if (rc == H_RESOURCE)
2013 rc = ibmvnic_reset_crq(adapter);
2015 if (rc == H_CLOSED) {
2016 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2018 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2022 scrq->adapter = adapter;
2023 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2024 spin_lock_init(&scrq->lock);
2026 netdev_dbg(adapter->netdev,
2027 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2028 scrq->crq_num, scrq->hw_irq, scrq->irq);
2033 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2036 free_pages((unsigned long)scrq->msgs, 2);
2043 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2047 if (adapter->tx_scrq) {
2048 for (i = 0; i < adapter->req_tx_queues; i++) {
2049 if (!adapter->tx_scrq[i])
2052 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2054 if (adapter->tx_scrq[i]->irq) {
2055 free_irq(adapter->tx_scrq[i]->irq,
2056 adapter->tx_scrq[i]);
2057 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2058 adapter->tx_scrq[i]->irq = 0;
2061 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2064 kfree(adapter->tx_scrq);
2065 adapter->tx_scrq = NULL;
2068 if (adapter->rx_scrq) {
2069 for (i = 0; i < adapter->req_rx_queues; i++) {
2070 if (!adapter->rx_scrq[i])
2073 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2075 if (adapter->rx_scrq[i]->irq) {
2076 free_irq(adapter->rx_scrq[i]->irq,
2077 adapter->rx_scrq[i]);
2078 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2079 adapter->rx_scrq[i]->irq = 0;
2082 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2085 kfree(adapter->rx_scrq);
2086 adapter->rx_scrq = NULL;
2090 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2091 struct ibmvnic_sub_crq_queue *scrq)
2093 struct device *dev = &adapter->vdev->dev;
2096 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2097 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2099 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2104 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2105 struct ibmvnic_sub_crq_queue *scrq)
2107 struct device *dev = &adapter->vdev->dev;
2110 if (scrq->hw_irq > 0x100000000ULL) {
2111 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2115 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2116 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2118 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2123 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2124 struct ibmvnic_sub_crq_queue *scrq)
2126 struct device *dev = &adapter->vdev->dev;
2127 struct ibmvnic_tx_buff *txbuff;
2128 union sub_crq *next;
2134 while (pending_scrq(adapter, scrq)) {
2135 unsigned int pool = scrq->pool_index;
2137 next = ibmvnic_next_scrq(adapter, scrq);
2138 for (i = 0; i < next->tx_comp.num_comps; i++) {
2139 if (next->tx_comp.rcs[i]) {
2140 dev_err(dev, "tx error %x\n",
2141 next->tx_comp.rcs[i]);
2144 index = be32_to_cpu(next->tx_comp.correlators[i]);
2145 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2147 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2148 if (!txbuff->data_dma[j])
2151 txbuff->data_dma[j] = 0;
2153 /* if sub_crq was sent indirectly */
2154 first = txbuff->indir_arr[0].generic.first;
2155 if (first == IBMVNIC_CRQ_CMD) {
2156 dma_unmap_single(dev, txbuff->indir_dma,
2157 sizeof(txbuff->indir_arr),
2161 if (txbuff->last_frag) {
2162 dev_kfree_skb_any(txbuff->skb);
2166 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2167 producer_index] = index;
2168 adapter->tx_pool[pool].producer_index =
2169 (adapter->tx_pool[pool].producer_index + 1) %
2170 adapter->req_tx_entries_per_subcrq;
2172 /* remove tx_comp scrq*/
2173 next->tx_comp.first = 0;
2175 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2176 (adapter->req_tx_entries_per_subcrq / 2) &&
2177 __netif_subqueue_stopped(adapter->netdev,
2178 scrq->pool_index)) {
2179 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2180 netdev_info(adapter->netdev, "Started queue %d\n",
2185 enable_scrq_irq(adapter, scrq);
2187 if (pending_scrq(adapter, scrq)) {
2188 disable_scrq_irq(adapter, scrq);
2195 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2197 struct ibmvnic_sub_crq_queue *scrq = instance;
2198 struct ibmvnic_adapter *adapter = scrq->adapter;
2200 disable_scrq_irq(adapter, scrq);
2201 ibmvnic_complete_tx(adapter, scrq);
2206 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2208 struct ibmvnic_sub_crq_queue *scrq = instance;
2209 struct ibmvnic_adapter *adapter = scrq->adapter;
2211 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2213 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2214 disable_scrq_irq(adapter, scrq);
2215 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2221 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2223 struct device *dev = &adapter->vdev->dev;
2224 struct ibmvnic_sub_crq_queue *scrq;
2228 for (i = 0; i < adapter->req_tx_queues; i++) {
2229 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2231 scrq = adapter->tx_scrq[i];
2232 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2236 dev_err(dev, "Error mapping irq\n");
2237 goto req_tx_irq_failed;
2240 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2241 0, "ibmvnic_tx", scrq);
2244 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2246 irq_dispose_mapping(scrq->irq);
2247 goto req_rx_irq_failed;
2251 for (i = 0; i < adapter->req_rx_queues; i++) {
2252 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2254 scrq = adapter->rx_scrq[i];
2255 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2258 dev_err(dev, "Error mapping irq\n");
2259 goto req_rx_irq_failed;
2261 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2262 0, "ibmvnic_rx", scrq);
2264 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2266 irq_dispose_mapping(scrq->irq);
2267 goto req_rx_irq_failed;
2273 for (j = 0; j < i; j++) {
2274 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2275 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2277 i = adapter->req_tx_queues;
2279 for (j = 0; j < i; j++) {
2280 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2281 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2283 release_sub_crqs(adapter);
2287 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2289 struct device *dev = &adapter->vdev->dev;
2290 struct ibmvnic_sub_crq_queue **allqueues;
2291 int registered_queues = 0;
2296 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2298 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2302 for (i = 0; i < total_queues; i++) {
2303 allqueues[i] = init_sub_crq_queue(adapter);
2304 if (!allqueues[i]) {
2305 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2308 registered_queues++;
2311 /* Make sure we were able to register the minimum number of queues */
2312 if (registered_queues <
2313 adapter->min_tx_queues + adapter->min_rx_queues) {
2314 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2318 /* Distribute the failed allocated queues*/
2319 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2320 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2323 if (adapter->req_rx_queues > adapter->min_rx_queues)
2324 adapter->req_rx_queues--;
2329 if (adapter->req_tx_queues > adapter->min_tx_queues)
2330 adapter->req_tx_queues--;
2337 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2338 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2339 if (!adapter->tx_scrq)
2342 for (i = 0; i < adapter->req_tx_queues; i++) {
2343 adapter->tx_scrq[i] = allqueues[i];
2344 adapter->tx_scrq[i]->pool_index = i;
2347 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2348 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2349 if (!adapter->rx_scrq)
2352 for (i = 0; i < adapter->req_rx_queues; i++) {
2353 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2354 adapter->rx_scrq[i]->scrq_num = i;
2361 kfree(adapter->tx_scrq);
2362 adapter->tx_scrq = NULL;
2364 for (i = 0; i < registered_queues; i++)
2365 release_sub_crq_queue(adapter, allqueues[i]);
2370 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2372 struct device *dev = &adapter->vdev->dev;
2373 union ibmvnic_crq crq;
2376 /* Sub-CRQ entries are 32 byte long */
2377 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2379 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2380 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2381 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2385 /* Get the minimum between the queried max and the entries
2386 * that fit in our PAGE_SIZE
2388 adapter->req_tx_entries_per_subcrq =
2389 adapter->max_tx_entries_per_subcrq > entries_page ?
2390 entries_page : adapter->max_tx_entries_per_subcrq;
2391 adapter->req_rx_add_entries_per_subcrq =
2392 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2393 entries_page : adapter->max_rx_add_entries_per_subcrq;
2395 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2396 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2397 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2399 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2402 memset(&crq, 0, sizeof(crq));
2403 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2404 crq.request_capability.cmd = REQUEST_CAPABILITY;
2406 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2407 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2408 atomic_inc(&adapter->running_cap_crqs);
2409 ibmvnic_send_crq(adapter, &crq);
2411 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2412 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2413 atomic_inc(&adapter->running_cap_crqs);
2414 ibmvnic_send_crq(adapter, &crq);
2416 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2417 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2418 atomic_inc(&adapter->running_cap_crqs);
2419 ibmvnic_send_crq(adapter, &crq);
2421 crq.request_capability.capability =
2422 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2423 crq.request_capability.number =
2424 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2425 atomic_inc(&adapter->running_cap_crqs);
2426 ibmvnic_send_crq(adapter, &crq);
2428 crq.request_capability.capability =
2429 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2430 crq.request_capability.number =
2431 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2432 atomic_inc(&adapter->running_cap_crqs);
2433 ibmvnic_send_crq(adapter, &crq);
2435 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2436 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2437 atomic_inc(&adapter->running_cap_crqs);
2438 ibmvnic_send_crq(adapter, &crq);
2440 if (adapter->netdev->flags & IFF_PROMISC) {
2441 if (adapter->promisc_supported) {
2442 crq.request_capability.capability =
2443 cpu_to_be16(PROMISC_REQUESTED);
2444 crq.request_capability.number = cpu_to_be64(1);
2445 atomic_inc(&adapter->running_cap_crqs);
2446 ibmvnic_send_crq(adapter, &crq);
2449 crq.request_capability.capability =
2450 cpu_to_be16(PROMISC_REQUESTED);
2451 crq.request_capability.number = cpu_to_be64(0);
2452 atomic_inc(&adapter->running_cap_crqs);
2453 ibmvnic_send_crq(adapter, &crq);
2457 static int pending_scrq(struct ibmvnic_adapter *adapter,
2458 struct ibmvnic_sub_crq_queue *scrq)
2460 union sub_crq *entry = &scrq->msgs[scrq->cur];
2462 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2468 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2469 struct ibmvnic_sub_crq_queue *scrq)
2471 union sub_crq *entry;
2472 unsigned long flags;
2474 spin_lock_irqsave(&scrq->lock, flags);
2475 entry = &scrq->msgs[scrq->cur];
2476 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2477 if (++scrq->cur == scrq->size)
2482 spin_unlock_irqrestore(&scrq->lock, flags);
2487 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2489 struct ibmvnic_crq_queue *queue = &adapter->crq;
2490 union ibmvnic_crq *crq;
2492 crq = &queue->msgs[queue->cur];
2493 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2494 if (++queue->cur == queue->size)
2503 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2504 union sub_crq *sub_crq)
2506 unsigned int ua = adapter->vdev->unit_address;
2507 struct device *dev = &adapter->vdev->dev;
2508 u64 *u64_crq = (u64 *)sub_crq;
2511 netdev_dbg(adapter->netdev,
2512 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2513 (unsigned long int)cpu_to_be64(remote_handle),
2514 (unsigned long int)cpu_to_be64(u64_crq[0]),
2515 (unsigned long int)cpu_to_be64(u64_crq[1]),
2516 (unsigned long int)cpu_to_be64(u64_crq[2]),
2517 (unsigned long int)cpu_to_be64(u64_crq[3]));
2519 /* Make sure the hypervisor sees the complete request */
2522 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2523 cpu_to_be64(remote_handle),
2524 cpu_to_be64(u64_crq[0]),
2525 cpu_to_be64(u64_crq[1]),
2526 cpu_to_be64(u64_crq[2]),
2527 cpu_to_be64(u64_crq[3]));
2531 dev_warn(dev, "CRQ Queue closed\n");
2532 dev_err(dev, "Send error (rc=%d)\n", rc);
2538 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2539 u64 remote_handle, u64 ioba, u64 num_entries)
2541 unsigned int ua = adapter->vdev->unit_address;
2542 struct device *dev = &adapter->vdev->dev;
2545 /* Make sure the hypervisor sees the complete request */
2547 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2548 cpu_to_be64(remote_handle),
2553 dev_warn(dev, "CRQ Queue closed\n");
2554 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2560 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2561 union ibmvnic_crq *crq)
2563 unsigned int ua = adapter->vdev->unit_address;
2564 struct device *dev = &adapter->vdev->dev;
2565 u64 *u64_crq = (u64 *)crq;
2568 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2569 (unsigned long int)cpu_to_be64(u64_crq[0]),
2570 (unsigned long int)cpu_to_be64(u64_crq[1]));
2572 /* Make sure the hypervisor sees the complete request */
2575 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2576 cpu_to_be64(u64_crq[0]),
2577 cpu_to_be64(u64_crq[1]));
2581 dev_warn(dev, "CRQ Queue closed\n");
2582 dev_warn(dev, "Send error (rc=%d)\n", rc);
2588 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2590 union ibmvnic_crq crq;
2592 memset(&crq, 0, sizeof(crq));
2593 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2594 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2595 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2597 return ibmvnic_send_crq(adapter, &crq);
2600 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2602 union ibmvnic_crq crq;
2604 memset(&crq, 0, sizeof(crq));
2605 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2606 crq.version_exchange.cmd = VERSION_EXCHANGE;
2607 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2609 return ibmvnic_send_crq(adapter, &crq);
2612 static void send_login(struct ibmvnic_adapter *adapter)
2614 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2615 struct ibmvnic_login_buffer *login_buffer;
2616 struct device *dev = &adapter->vdev->dev;
2617 dma_addr_t rsp_buffer_token;
2618 dma_addr_t buffer_token;
2619 size_t rsp_buffer_size;
2620 union ibmvnic_crq crq;
2627 sizeof(struct ibmvnic_login_buffer) +
2628 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2630 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2632 goto buf_alloc_failed;
2634 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2636 if (dma_mapping_error(dev, buffer_token)) {
2637 dev_err(dev, "Couldn't map login buffer\n");
2638 goto buf_map_failed;
2641 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2642 sizeof(u64) * adapter->req_tx_queues +
2643 sizeof(u64) * adapter->req_rx_queues +
2644 sizeof(u64) * adapter->req_rx_queues +
2645 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2647 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2648 if (!login_rsp_buffer)
2649 goto buf_rsp_alloc_failed;
2651 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2652 rsp_buffer_size, DMA_FROM_DEVICE);
2653 if (dma_mapping_error(dev, rsp_buffer_token)) {
2654 dev_err(dev, "Couldn't map login rsp buffer\n");
2655 goto buf_rsp_map_failed;
2658 adapter->login_buf = login_buffer;
2659 adapter->login_buf_token = buffer_token;
2660 adapter->login_buf_sz = buffer_size;
2661 adapter->login_rsp_buf = login_rsp_buffer;
2662 adapter->login_rsp_buf_token = rsp_buffer_token;
2663 adapter->login_rsp_buf_sz = rsp_buffer_size;
2665 login_buffer->len = cpu_to_be32(buffer_size);
2666 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2667 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2668 login_buffer->off_txcomp_subcrqs =
2669 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2670 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2671 login_buffer->off_rxcomp_subcrqs =
2672 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2673 sizeof(u64) * adapter->req_tx_queues);
2674 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2675 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2677 tx_list_p = (__be64 *)((char *)login_buffer +
2678 sizeof(struct ibmvnic_login_buffer));
2679 rx_list_p = (__be64 *)((char *)login_buffer +
2680 sizeof(struct ibmvnic_login_buffer) +
2681 sizeof(u64) * adapter->req_tx_queues);
2683 for (i = 0; i < adapter->req_tx_queues; i++) {
2684 if (adapter->tx_scrq[i]) {
2685 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2690 for (i = 0; i < adapter->req_rx_queues; i++) {
2691 if (adapter->rx_scrq[i]) {
2692 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2697 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2698 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2699 netdev_dbg(adapter->netdev, "%016lx\n",
2700 ((unsigned long int *)(adapter->login_buf))[i]);
2703 memset(&crq, 0, sizeof(crq));
2704 crq.login.first = IBMVNIC_CRQ_CMD;
2705 crq.login.cmd = LOGIN;
2706 crq.login.ioba = cpu_to_be32(buffer_token);
2707 crq.login.len = cpu_to_be32(buffer_size);
2708 ibmvnic_send_crq(adapter, &crq);
2713 kfree(login_rsp_buffer);
2714 buf_rsp_alloc_failed:
2715 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2717 kfree(login_buffer);
2722 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2725 union ibmvnic_crq crq;
2727 memset(&crq, 0, sizeof(crq));
2728 crq.request_map.first = IBMVNIC_CRQ_CMD;
2729 crq.request_map.cmd = REQUEST_MAP;
2730 crq.request_map.map_id = map_id;
2731 crq.request_map.ioba = cpu_to_be32(addr);
2732 crq.request_map.len = cpu_to_be32(len);
2733 ibmvnic_send_crq(adapter, &crq);
2736 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2738 union ibmvnic_crq crq;
2740 memset(&crq, 0, sizeof(crq));
2741 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2742 crq.request_unmap.cmd = REQUEST_UNMAP;
2743 crq.request_unmap.map_id = map_id;
2744 ibmvnic_send_crq(adapter, &crq);
2747 static void send_map_query(struct ibmvnic_adapter *adapter)
2749 union ibmvnic_crq crq;
2751 memset(&crq, 0, sizeof(crq));
2752 crq.query_map.first = IBMVNIC_CRQ_CMD;
2753 crq.query_map.cmd = QUERY_MAP;
2754 ibmvnic_send_crq(adapter, &crq);
2757 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2758 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2760 union ibmvnic_crq crq;
2762 atomic_set(&adapter->running_cap_crqs, 0);
2763 memset(&crq, 0, sizeof(crq));
2764 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2765 crq.query_capability.cmd = QUERY_CAPABILITY;
2767 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2768 atomic_inc(&adapter->running_cap_crqs);
2769 ibmvnic_send_crq(adapter, &crq);
2771 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2772 atomic_inc(&adapter->running_cap_crqs);
2773 ibmvnic_send_crq(adapter, &crq);
2775 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2776 atomic_inc(&adapter->running_cap_crqs);
2777 ibmvnic_send_crq(adapter, &crq);
2779 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2780 atomic_inc(&adapter->running_cap_crqs);
2781 ibmvnic_send_crq(adapter, &crq);
2783 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2784 atomic_inc(&adapter->running_cap_crqs);
2785 ibmvnic_send_crq(adapter, &crq);
2787 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2788 atomic_inc(&adapter->running_cap_crqs);
2789 ibmvnic_send_crq(adapter, &crq);
2791 crq.query_capability.capability =
2792 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2793 atomic_inc(&adapter->running_cap_crqs);
2794 ibmvnic_send_crq(adapter, &crq);
2796 crq.query_capability.capability =
2797 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2798 atomic_inc(&adapter->running_cap_crqs);
2799 ibmvnic_send_crq(adapter, &crq);
2801 crq.query_capability.capability =
2802 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2803 atomic_inc(&adapter->running_cap_crqs);
2804 ibmvnic_send_crq(adapter, &crq);
2806 crq.query_capability.capability =
2807 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2808 atomic_inc(&adapter->running_cap_crqs);
2809 ibmvnic_send_crq(adapter, &crq);
2811 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2812 atomic_inc(&adapter->running_cap_crqs);
2813 ibmvnic_send_crq(adapter, &crq);
2815 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2816 atomic_inc(&adapter->running_cap_crqs);
2817 ibmvnic_send_crq(adapter, &crq);
2819 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2820 atomic_inc(&adapter->running_cap_crqs);
2821 ibmvnic_send_crq(adapter, &crq);
2823 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2824 atomic_inc(&adapter->running_cap_crqs);
2825 ibmvnic_send_crq(adapter, &crq);
2827 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2828 atomic_inc(&adapter->running_cap_crqs);
2829 ibmvnic_send_crq(adapter, &crq);
2831 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2832 atomic_inc(&adapter->running_cap_crqs);
2833 ibmvnic_send_crq(adapter, &crq);
2835 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2836 atomic_inc(&adapter->running_cap_crqs);
2837 ibmvnic_send_crq(adapter, &crq);
2839 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2840 atomic_inc(&adapter->running_cap_crqs);
2841 ibmvnic_send_crq(adapter, &crq);
2843 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2844 atomic_inc(&adapter->running_cap_crqs);
2845 ibmvnic_send_crq(adapter, &crq);
2847 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2848 atomic_inc(&adapter->running_cap_crqs);
2849 ibmvnic_send_crq(adapter, &crq);
2851 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2852 atomic_inc(&adapter->running_cap_crqs);
2853 ibmvnic_send_crq(adapter, &crq);
2855 crq.query_capability.capability =
2856 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2857 atomic_inc(&adapter->running_cap_crqs);
2858 ibmvnic_send_crq(adapter, &crq);
2860 crq.query_capability.capability =
2861 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2862 atomic_inc(&adapter->running_cap_crqs);
2863 ibmvnic_send_crq(adapter, &crq);
2865 crq.query_capability.capability =
2866 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2867 atomic_inc(&adapter->running_cap_crqs);
2868 ibmvnic_send_crq(adapter, &crq);
2870 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2871 atomic_inc(&adapter->running_cap_crqs);
2872 ibmvnic_send_crq(adapter, &crq);
2875 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2877 struct device *dev = &adapter->vdev->dev;
2878 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2879 union ibmvnic_crq crq;
2882 dma_unmap_single(dev, adapter->ip_offload_tok,
2883 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2885 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2886 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2887 netdev_dbg(adapter->netdev, "%016lx\n",
2888 ((unsigned long int *)(buf))[i]);
2890 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2891 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2892 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2893 buf->tcp_ipv4_chksum);
2894 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2895 buf->tcp_ipv6_chksum);
2896 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2897 buf->udp_ipv4_chksum);
2898 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2899 buf->udp_ipv6_chksum);
2900 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2901 buf->large_tx_ipv4);
2902 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2903 buf->large_tx_ipv6);
2904 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2905 buf->large_rx_ipv4);
2906 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2907 buf->large_rx_ipv6);
2908 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2909 buf->max_ipv4_header_size);
2910 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2911 buf->max_ipv6_header_size);
2912 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2913 buf->max_tcp_header_size);
2914 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2915 buf->max_udp_header_size);
2916 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2917 buf->max_large_tx_size);
2918 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2919 buf->max_large_rx_size);
2920 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2921 buf->ipv6_extension_header);
2922 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2923 buf->tcp_pseudosum_req);
2924 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2925 buf->num_ipv6_ext_headers);
2926 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2927 buf->off_ipv6_ext_headers);
2929 adapter->ip_offload_ctrl_tok =
2930 dma_map_single(dev, &adapter->ip_offload_ctrl,
2931 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2933 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2934 dev_err(dev, "Couldn't map ip offload control buffer\n");
2938 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2939 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2940 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2941 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2942 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2944 /* large_tx/rx disabled for now, additional features needed */
2945 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2946 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2947 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2948 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2950 adapter->netdev->features = NETIF_F_GSO;
2952 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2953 adapter->netdev->features |= NETIF_F_IP_CSUM;
2955 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2956 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2958 if ((adapter->netdev->features &
2959 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2960 adapter->netdev->features |= NETIF_F_RXCSUM;
2962 memset(&crq, 0, sizeof(crq));
2963 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2964 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2965 crq.control_ip_offload.len =
2966 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2967 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2968 ibmvnic_send_crq(adapter, &crq);
2971 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2972 struct ibmvnic_adapter *adapter)
2974 struct device *dev = &adapter->vdev->dev;
2975 struct ibmvnic_error_buff *error_buff, *tmp;
2976 unsigned long flags;
2980 if (!crq->request_error_rsp.rc.code) {
2981 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2982 crq->request_error_rsp.rc.code);
2986 spin_lock_irqsave(&adapter->error_list_lock, flags);
2987 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2988 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2990 list_del(&error_buff->list);
2993 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2996 dev_err(dev, "Couldn't find error id %x\n",
2997 be32_to_cpu(crq->request_error_rsp.error_id));
3001 dev_err(dev, "Detailed info for error id %x:",
3002 be32_to_cpu(crq->request_error_rsp.error_id));
3004 for (i = 0; i < error_buff->len; i++) {
3005 pr_cont("%02x", (int)error_buff->buff[i]);
3011 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3013 kfree(error_buff->buff);
3017 static void request_error_information(struct ibmvnic_adapter *adapter,
3018 union ibmvnic_crq *err_crq)
3020 struct device *dev = &adapter->vdev->dev;
3021 struct net_device *netdev = adapter->netdev;
3022 struct ibmvnic_error_buff *error_buff;
3023 unsigned long timeout = msecs_to_jiffies(30000);
3024 union ibmvnic_crq crq;
3025 unsigned long flags;
3028 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3032 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3033 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3034 if (!error_buff->buff) {
3039 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3041 if (dma_mapping_error(dev, error_buff->dma)) {
3042 netdev_err(netdev, "Couldn't map error buffer\n");
3043 kfree(error_buff->buff);
3048 error_buff->len = detail_len;
3049 error_buff->error_id = err_crq->error_indication.error_id;
3051 spin_lock_irqsave(&adapter->error_list_lock, flags);
3052 list_add_tail(&error_buff->list, &adapter->errors);
3053 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3055 memset(&crq, 0, sizeof(crq));
3056 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3057 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3058 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3059 crq.request_error_info.len = cpu_to_be32(detail_len);
3060 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3062 rc = ibmvnic_send_crq(adapter, &crq);
3064 netdev_err(netdev, "failed to request error information\n");
3068 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3069 netdev_err(netdev, "timeout waiting for error information\n");
3076 spin_lock_irqsave(&adapter->error_list_lock, flags);
3077 list_del(&error_buff->list);
3078 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3080 kfree(error_buff->buff);
3084 static void handle_error_indication(union ibmvnic_crq *crq,
3085 struct ibmvnic_adapter *adapter)
3087 struct device *dev = &adapter->vdev->dev;
3089 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3090 crq->error_indication.flags
3091 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3092 be32_to_cpu(crq->error_indication.error_id),
3093 be16_to_cpu(crq->error_indication.error_cause));
3095 if (be32_to_cpu(crq->error_indication.error_id))
3096 request_error_information(adapter, crq);
3098 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3099 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3101 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3104 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3105 struct ibmvnic_adapter *adapter)
3107 struct net_device *netdev = adapter->netdev;
3108 struct device *dev = &adapter->vdev->dev;
3111 rc = crq->change_mac_addr_rsp.rc.code;
3113 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3116 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3120 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3121 struct ibmvnic_adapter *adapter)
3123 struct device *dev = &adapter->vdev->dev;
3127 atomic_dec(&adapter->running_cap_crqs);
3128 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3130 req_value = &adapter->req_tx_queues;
3134 req_value = &adapter->req_rx_queues;
3137 case REQ_RX_ADD_QUEUES:
3138 req_value = &adapter->req_rx_add_queues;
3141 case REQ_TX_ENTRIES_PER_SUBCRQ:
3142 req_value = &adapter->req_tx_entries_per_subcrq;
3143 name = "tx_entries_per_subcrq";
3145 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3146 req_value = &adapter->req_rx_add_entries_per_subcrq;
3147 name = "rx_add_entries_per_subcrq";
3150 req_value = &adapter->req_mtu;
3153 case PROMISC_REQUESTED:
3154 req_value = &adapter->promisc;
3158 dev_err(dev, "Got invalid cap request rsp %d\n",
3159 crq->request_capability.capability);
3163 switch (crq->request_capability_rsp.rc.code) {
3166 case PARTIALSUCCESS:
3167 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3169 (long int)be64_to_cpu(crq->request_capability_rsp.
3171 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3172 ibmvnic_send_req_caps(adapter, 1);
3175 dev_err(dev, "Error %d in request cap rsp\n",
3176 crq->request_capability_rsp.rc.code);
3180 /* Done receiving requested capabilities, query IP offload support */
3181 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3182 union ibmvnic_crq newcrq;
3183 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3184 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3185 &adapter->ip_offload_buf;
3187 adapter->wait_capability = false;
3188 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3192 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3193 if (!firmware_has_feature(FW_FEATURE_CMO))
3194 dev_err(dev, "Couldn't map offload buffer\n");
3198 memset(&newcrq, 0, sizeof(newcrq));
3199 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3200 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3201 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3202 newcrq.query_ip_offload.ioba =
3203 cpu_to_be32(adapter->ip_offload_tok);
3205 ibmvnic_send_crq(adapter, &newcrq);
3209 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3210 struct ibmvnic_adapter *adapter)
3212 struct device *dev = &adapter->vdev->dev;
3213 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3214 struct ibmvnic_login_buffer *login = adapter->login_buf;
3217 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3219 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3220 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3222 /* If the number of queues requested can't be allocated by the
3223 * server, the login response will return with code 1. We will need
3224 * to resend the login buffer with fewer queues requested.
3226 if (login_rsp_crq->generic.rc.code) {
3227 adapter->renegotiate = true;
3228 complete(&adapter->init_done);
3232 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3233 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3234 netdev_dbg(adapter->netdev, "%016lx\n",
3235 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3239 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3240 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3241 adapter->req_rx_add_queues !=
3242 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3243 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3244 ibmvnic_remove(adapter->vdev);
3247 complete(&adapter->init_done);
3252 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3253 struct ibmvnic_adapter *adapter)
3255 struct device *dev = &adapter->vdev->dev;
3258 rc = crq->request_unmap_rsp.rc.code;
3260 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3263 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3264 struct ibmvnic_adapter *adapter)
3266 struct net_device *netdev = adapter->netdev;
3267 struct device *dev = &adapter->vdev->dev;
3270 rc = crq->query_map_rsp.rc.code;
3272 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3275 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3276 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3277 crq->query_map_rsp.free_pages);
3280 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3281 struct ibmvnic_adapter *adapter)
3283 struct net_device *netdev = adapter->netdev;
3284 struct device *dev = &adapter->vdev->dev;
3287 atomic_dec(&adapter->running_cap_crqs);
3288 netdev_dbg(netdev, "Outstanding queries: %d\n",
3289 atomic_read(&adapter->running_cap_crqs));
3290 rc = crq->query_capability.rc.code;
3292 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3296 switch (be16_to_cpu(crq->query_capability.capability)) {
3298 adapter->min_tx_queues =
3299 be64_to_cpu(crq->query_capability.number);
3300 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3301 adapter->min_tx_queues);
3304 adapter->min_rx_queues =
3305 be64_to_cpu(crq->query_capability.number);
3306 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3307 adapter->min_rx_queues);
3309 case MIN_RX_ADD_QUEUES:
3310 adapter->min_rx_add_queues =
3311 be64_to_cpu(crq->query_capability.number);
3312 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3313 adapter->min_rx_add_queues);
3316 adapter->max_tx_queues =
3317 be64_to_cpu(crq->query_capability.number);
3318 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3319 adapter->max_tx_queues);
3322 adapter->max_rx_queues =
3323 be64_to_cpu(crq->query_capability.number);
3324 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3325 adapter->max_rx_queues);
3327 case MAX_RX_ADD_QUEUES:
3328 adapter->max_rx_add_queues =
3329 be64_to_cpu(crq->query_capability.number);
3330 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3331 adapter->max_rx_add_queues);
3333 case MIN_TX_ENTRIES_PER_SUBCRQ:
3334 adapter->min_tx_entries_per_subcrq =
3335 be64_to_cpu(crq->query_capability.number);
3336 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3337 adapter->min_tx_entries_per_subcrq);
3339 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3340 adapter->min_rx_add_entries_per_subcrq =
3341 be64_to_cpu(crq->query_capability.number);
3342 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3343 adapter->min_rx_add_entries_per_subcrq);
3345 case MAX_TX_ENTRIES_PER_SUBCRQ:
3346 adapter->max_tx_entries_per_subcrq =
3347 be64_to_cpu(crq->query_capability.number);
3348 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3349 adapter->max_tx_entries_per_subcrq);
3351 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3352 adapter->max_rx_add_entries_per_subcrq =
3353 be64_to_cpu(crq->query_capability.number);
3354 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3355 adapter->max_rx_add_entries_per_subcrq);
3357 case TCP_IP_OFFLOAD:
3358 adapter->tcp_ip_offload =
3359 be64_to_cpu(crq->query_capability.number);
3360 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3361 adapter->tcp_ip_offload);
3363 case PROMISC_SUPPORTED:
3364 adapter->promisc_supported =
3365 be64_to_cpu(crq->query_capability.number);
3366 netdev_dbg(netdev, "promisc_supported = %lld\n",
3367 adapter->promisc_supported);
3370 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3371 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3372 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3375 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3376 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3377 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3379 case MAX_MULTICAST_FILTERS:
3380 adapter->max_multicast_filters =
3381 be64_to_cpu(crq->query_capability.number);
3382 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3383 adapter->max_multicast_filters);
3385 case VLAN_HEADER_INSERTION:
3386 adapter->vlan_header_insertion =
3387 be64_to_cpu(crq->query_capability.number);
3388 if (adapter->vlan_header_insertion)
3389 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3390 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3391 adapter->vlan_header_insertion);
3393 case RX_VLAN_HEADER_INSERTION:
3394 adapter->rx_vlan_header_insertion =
3395 be64_to_cpu(crq->query_capability.number);
3396 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3397 adapter->rx_vlan_header_insertion);
3399 case MAX_TX_SG_ENTRIES:
3400 adapter->max_tx_sg_entries =
3401 be64_to_cpu(crq->query_capability.number);
3402 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3403 adapter->max_tx_sg_entries);
3405 case RX_SG_SUPPORTED:
3406 adapter->rx_sg_supported =
3407 be64_to_cpu(crq->query_capability.number);
3408 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3409 adapter->rx_sg_supported);
3411 case OPT_TX_COMP_SUB_QUEUES:
3412 adapter->opt_tx_comp_sub_queues =
3413 be64_to_cpu(crq->query_capability.number);
3414 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3415 adapter->opt_tx_comp_sub_queues);
3417 case OPT_RX_COMP_QUEUES:
3418 adapter->opt_rx_comp_queues =
3419 be64_to_cpu(crq->query_capability.number);
3420 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3421 adapter->opt_rx_comp_queues);
3423 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3424 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3425 be64_to_cpu(crq->query_capability.number);
3426 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3427 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3429 case OPT_TX_ENTRIES_PER_SUBCRQ:
3430 adapter->opt_tx_entries_per_subcrq =
3431 be64_to_cpu(crq->query_capability.number);
3432 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3433 adapter->opt_tx_entries_per_subcrq);
3435 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3436 adapter->opt_rxba_entries_per_subcrq =
3437 be64_to_cpu(crq->query_capability.number);
3438 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3439 adapter->opt_rxba_entries_per_subcrq);
3441 case TX_RX_DESC_REQ:
3442 adapter->tx_rx_desc_req = crq->query_capability.number;
3443 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3444 adapter->tx_rx_desc_req);
3448 netdev_err(netdev, "Got invalid cap rsp %d\n",
3449 crq->query_capability.capability);
3453 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3454 adapter->wait_capability = false;
3455 ibmvnic_send_req_caps(adapter, 0);
3459 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3460 struct ibmvnic_adapter *adapter)
3462 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3463 struct net_device *netdev = adapter->netdev;
3464 struct device *dev = &adapter->vdev->dev;
3465 u64 *u64_crq = (u64 *)crq;
3468 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3469 (unsigned long int)cpu_to_be64(u64_crq[0]),
3470 (unsigned long int)cpu_to_be64(u64_crq[1]));
3471 switch (gen_crq->first) {
3472 case IBMVNIC_CRQ_INIT_RSP:
3473 switch (gen_crq->cmd) {
3474 case IBMVNIC_CRQ_INIT:
3475 dev_info(dev, "Partner initialized\n");
3476 adapter->from_passive_init = true;
3477 complete(&adapter->init_done);
3479 case IBMVNIC_CRQ_INIT_COMPLETE:
3480 dev_info(dev, "Partner initialization complete\n");
3481 send_version_xchg(adapter);
3484 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3487 case IBMVNIC_CRQ_XPORT_EVENT:
3488 netif_carrier_off(netdev);
3489 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3490 dev_info(dev, "Migrated, re-enabling adapter\n");
3491 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3492 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3493 dev_info(dev, "Backing device failover detected\n");
3494 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3496 /* The adapter lost the connection */
3497 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3499 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3502 case IBMVNIC_CRQ_CMD_RSP:
3505 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3510 switch (gen_crq->cmd) {
3511 case VERSION_EXCHANGE_RSP:
3512 rc = crq->version_exchange_rsp.rc.code;
3514 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3517 dev_info(dev, "Partner protocol version is %d\n",
3518 crq->version_exchange_rsp.version);
3519 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3522 be16_to_cpu(crq->version_exchange_rsp.version);
3523 send_cap_queries(adapter);
3525 case QUERY_CAPABILITY_RSP:
3526 handle_query_cap_rsp(crq, adapter);
3529 handle_query_map_rsp(crq, adapter);
3531 case REQUEST_MAP_RSP:
3532 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3533 complete(&adapter->fw_done);
3535 case REQUEST_UNMAP_RSP:
3536 handle_request_unmap_rsp(crq, adapter);
3538 case REQUEST_CAPABILITY_RSP:
3539 handle_request_cap_rsp(crq, adapter);
3542 netdev_dbg(netdev, "Got Login Response\n");
3543 handle_login_rsp(crq, adapter);
3545 case LOGICAL_LINK_STATE_RSP:
3547 "Got Logical Link State Response, state: %d rc: %d\n",
3548 crq->logical_link_state_rsp.link_state,
3549 crq->logical_link_state_rsp.rc.code);
3550 adapter->logical_link_state =
3551 crq->logical_link_state_rsp.link_state;
3552 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3553 complete(&adapter->init_done);
3555 case LINK_STATE_INDICATION:
3556 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3557 adapter->phys_link_state =
3558 crq->link_state_indication.phys_link_state;
3559 adapter->logical_link_state =
3560 crq->link_state_indication.logical_link_state;
3562 case CHANGE_MAC_ADDR_RSP:
3563 netdev_dbg(netdev, "Got MAC address change Response\n");
3564 handle_change_mac_rsp(crq, adapter);
3566 case ERROR_INDICATION:
3567 netdev_dbg(netdev, "Got Error Indication\n");
3568 handle_error_indication(crq, adapter);
3570 case REQUEST_ERROR_RSP:
3571 netdev_dbg(netdev, "Got Error Detail Response\n");
3572 handle_error_info_rsp(crq, adapter);
3574 case REQUEST_STATISTICS_RSP:
3575 netdev_dbg(netdev, "Got Statistics Response\n");
3576 complete(&adapter->stats_done);
3578 case QUERY_IP_OFFLOAD_RSP:
3579 netdev_dbg(netdev, "Got Query IP offload Response\n");
3580 handle_query_ip_offload_rsp(adapter);
3582 case MULTICAST_CTRL_RSP:
3583 netdev_dbg(netdev, "Got multicast control Response\n");
3585 case CONTROL_IP_OFFLOAD_RSP:
3586 netdev_dbg(netdev, "Got Control IP offload Response\n");
3587 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3588 sizeof(adapter->ip_offload_ctrl),
3590 complete(&adapter->init_done);
3592 case COLLECT_FW_TRACE_RSP:
3593 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3594 complete(&adapter->fw_done);
3597 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3602 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3604 struct ibmvnic_adapter *adapter = instance;
3606 tasklet_schedule(&adapter->tasklet);
3610 static void ibmvnic_tasklet(void *data)
3612 struct ibmvnic_adapter *adapter = data;
3613 struct ibmvnic_crq_queue *queue = &adapter->crq;
3614 union ibmvnic_crq *crq;
3615 unsigned long flags;
3618 spin_lock_irqsave(&queue->lock, flags);
3620 /* Pull all the valid messages off the CRQ */
3621 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3622 ibmvnic_handle_crq(crq, adapter);
3623 crq->generic.first = 0;
3626 /* remain in tasklet until all
3627 * capabilities responses are received
3629 if (!adapter->wait_capability)
3632 /* if capabilities CRQ's were sent in this tasklet, the following
3633 * tasklet must wait until all responses are received
3635 if (atomic_read(&adapter->running_cap_crqs) != 0)
3636 adapter->wait_capability = true;
3637 spin_unlock_irqrestore(&queue->lock, flags);
3640 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3642 struct vio_dev *vdev = adapter->vdev;
3646 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3647 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3650 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3655 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3657 struct ibmvnic_crq_queue *crq = &adapter->crq;
3658 struct device *dev = &adapter->vdev->dev;
3659 struct vio_dev *vdev = adapter->vdev;
3664 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3665 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3667 /* Clean out the queue */
3668 memset(crq->msgs, 0, PAGE_SIZE);
3671 /* And re-open it again */
3672 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3673 crq->msg_token, PAGE_SIZE);
3676 /* Adapter is good, but other end is not ready */
3677 dev_warn(dev, "Partner adapter not ready\n");
3679 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3684 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3686 struct ibmvnic_crq_queue *crq = &adapter->crq;
3687 struct vio_dev *vdev = adapter->vdev;
3693 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3694 free_irq(vdev->irq, adapter);
3695 tasklet_kill(&adapter->tasklet);
3697 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3698 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3700 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3702 free_page((unsigned long)crq->msgs);
3706 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3708 struct ibmvnic_crq_queue *crq = &adapter->crq;
3709 struct device *dev = &adapter->vdev->dev;
3710 struct vio_dev *vdev = adapter->vdev;
3711 int rc, retrc = -ENOMEM;
3716 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3717 /* Should we allocate more than one page? */
3722 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3723 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3725 if (dma_mapping_error(dev, crq->msg_token))
3728 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3729 crq->msg_token, PAGE_SIZE);
3731 if (rc == H_RESOURCE)
3732 /* maybe kexecing and resource is busy. try a reset */
3733 rc = ibmvnic_reset_crq(adapter);
3736 if (rc == H_CLOSED) {
3737 dev_warn(dev, "Partner adapter not ready\n");
3739 dev_warn(dev, "Error %d opening adapter\n", rc);
3740 goto reg_crq_failed;
3745 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3746 (unsigned long)adapter);
3748 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3749 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3752 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3754 goto req_irq_failed;
3757 rc = vio_enable_interrupts(vdev);
3759 dev_err(dev, "Error %d enabling interrupts\n", rc);
3760 goto req_irq_failed;
3764 spin_lock_init(&crq->lock);
3769 tasklet_kill(&adapter->tasklet);
3771 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3772 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3774 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3776 free_page((unsigned long)crq->msgs);
3781 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3783 struct device *dev = &adapter->vdev->dev;
3784 unsigned long timeout = msecs_to_jiffies(30000);
3787 if (adapter->resetting) {
3788 rc = ibmvnic_reset_crq(adapter);
3790 rc = vio_enable_interrupts(adapter->vdev);
3792 rc = init_crq_queue(adapter);
3796 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3800 adapter->from_passive_init = false;
3802 init_completion(&adapter->init_done);
3803 adapter->init_done_rc = 0;
3804 ibmvnic_send_crq_init(adapter);
3805 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3806 dev_err(dev, "Initialization sequence timed out\n");
3810 if (adapter->init_done_rc) {
3811 release_crq_queue(adapter);
3812 return adapter->init_done_rc;
3815 if (adapter->from_passive_init) {
3816 adapter->state = VNIC_OPEN;
3817 adapter->from_passive_init = false;
3821 if (adapter->resetting)
3822 rc = reset_sub_crq_queues(adapter);
3824 rc = init_sub_crqs(adapter);
3826 dev_err(dev, "Initialization of sub crqs failed\n");
3827 release_crq_queue(adapter);
3831 rc = init_sub_crq_irqs(adapter);
3833 dev_err(dev, "Failed to initialize sub crq irqs\n");
3834 release_crq_queue(adapter);
3840 static struct device_attribute dev_attr_failover;
3842 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3844 struct ibmvnic_adapter *adapter;
3845 struct net_device *netdev;
3846 unsigned char *mac_addr_p;
3849 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3852 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3853 VETH_MAC_ADDR, NULL);
3856 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3857 __FILE__, __LINE__);
3861 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3862 IBMVNIC_MAX_TX_QUEUES);
3866 adapter = netdev_priv(netdev);
3867 adapter->state = VNIC_PROBING;
3868 dev_set_drvdata(&dev->dev, netdev);
3869 adapter->vdev = dev;
3870 adapter->netdev = netdev;
3872 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3873 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3874 netdev->irq = dev->irq;
3875 netdev->netdev_ops = &ibmvnic_netdev_ops;
3876 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3877 SET_NETDEV_DEV(netdev, &dev->dev);
3879 spin_lock_init(&adapter->stats_lock);
3881 INIT_LIST_HEAD(&adapter->errors);
3882 spin_lock_init(&adapter->error_list_lock);
3884 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3885 INIT_LIST_HEAD(&adapter->rwi_list);
3886 mutex_init(&adapter->reset_lock);
3887 mutex_init(&adapter->rwi_lock);
3888 adapter->resetting = false;
3891 rc = ibmvnic_init(adapter);
3892 if (rc && rc != EAGAIN)
3893 goto ibmvnic_init_fail;
3894 } while (rc == EAGAIN);
3896 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3898 rc = device_create_file(&dev->dev, &dev_attr_failover);
3900 goto ibmvnic_init_fail;
3902 rc = register_netdev(netdev);
3904 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3905 goto ibmvnic_register_fail;
3907 dev_info(&dev->dev, "ibmvnic registered\n");
3909 adapter->state = VNIC_PROBED;
3912 ibmvnic_register_fail:
3913 device_remove_file(&dev->dev, &dev_attr_failover);
3916 release_sub_crqs(adapter);
3917 release_crq_queue(adapter);
3918 free_netdev(netdev);
3923 static int ibmvnic_remove(struct vio_dev *dev)
3925 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3926 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3928 adapter->state = VNIC_REMOVING;
3929 unregister_netdev(netdev);
3930 mutex_lock(&adapter->reset_lock);
3932 release_resources(adapter);
3933 release_sub_crqs(adapter);
3934 release_crq_queue(adapter);
3936 adapter->state = VNIC_REMOVED;
3938 mutex_unlock(&adapter->reset_lock);
3939 device_remove_file(&dev->dev, &dev_attr_failover);
3940 free_netdev(netdev);
3941 dev_set_drvdata(&dev->dev, NULL);
3946 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3947 const char *buf, size_t count)
3949 struct net_device *netdev = dev_get_drvdata(dev);
3950 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3951 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3952 __be64 session_token;
3955 if (!sysfs_streq(buf, "1"))
3958 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3959 H_GET_SESSION_TOKEN, 0, 0, 0);
3961 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3966 session_token = (__be64)retbuf[0];
3967 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3968 be64_to_cpu(session_token));
3969 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3970 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3972 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3980 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3982 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3984 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3985 struct ibmvnic_adapter *adapter;
3986 struct iommu_table *tbl;
3987 unsigned long ret = 0;
3990 tbl = get_iommu_table_base(&vdev->dev);
3992 /* netdev inits at probe time along with the structures we need below*/
3994 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3996 adapter = netdev_priv(netdev);
3998 ret += PAGE_SIZE; /* the crq message queue */
3999 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4001 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4002 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4004 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4006 ret += adapter->rx_pool[i].size *
4007 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4012 static int ibmvnic_resume(struct device *dev)
4014 struct net_device *netdev = dev_get_drvdata(dev);
4015 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4017 if (adapter->state != VNIC_OPEN)
4020 tasklet_schedule(&adapter->tasklet);
4025 static const struct vio_device_id ibmvnic_device_table[] = {
4026 {"network", "IBM,vnic"},
4029 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4031 static const struct dev_pm_ops ibmvnic_pm_ops = {
4032 .resume = ibmvnic_resume
4035 static struct vio_driver ibmvnic_driver = {
4036 .id_table = ibmvnic_device_table,
4037 .probe = ibmvnic_probe,
4038 .remove = ibmvnic_remove,
4039 .get_desired_dma = ibmvnic_get_desired_dma,
4040 .name = ibmvnic_driver_name,
4041 .pm = &ibmvnic_pm_ops,
4044 /* module functions */
4045 static int __init ibmvnic_module_init(void)
4047 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4048 IBMVNIC_DRIVER_VERSION);
4050 return vio_register_driver(&ibmvnic_driver);
4053 static void __exit ibmvnic_module_exit(void)
4055 vio_unregister_driver(&ibmvnic_driver);
4058 module_init(ibmvnic_module_init);
4059 module_exit(ibmvnic_module_exit);