1 /**************************************************************************/
2 /* */
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) */
8 /* */
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. */
13 /* */
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. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
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. */
26 /* */
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. */
36 /* */
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. */
43 /* */
44 /**************************************************************************/
45
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>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/if_arp.h>
63 #include <linux/in.h>
64 #include <linux/ip.h>
65 #include <linux/ipv6.h>
66 #include <linux/irq.h>
67 #include <linux/kthread.h>
68 #include <linux/seq_file.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
73 #include <asm/vio.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/workqueue.h>
78 #include <linux/if_vlan.h>
79 #include <linux/utsname.h>
80
81 #include "ibmvnic.h"
82
83 static const char ibmvnic_driver_name[] = "ibmvnic";
84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
86 MODULE_AUTHOR("Santiago Leon");
87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92 static int ibmvnic_remove(struct vio_dev *);
93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static int send_request_unmap(struct ibmvnic_adapter *, u8);
114 static int send_login(struct ibmvnic_adapter *adapter);
115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
116 static int init_sub_crqs(struct ibmvnic_adapter *);
117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118 static int ibmvnic_init(struct ibmvnic_adapter *);
119 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
120 static void release_crq_queue(struct ibmvnic_adapter *);
121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
122 static int init_crq_queue(struct ibmvnic_adapter *adapter);
123
124 struct ibmvnic_stat {
125 char name[ETH_GSTRING_LEN];
126 int offset;
127 };
128
129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
130 offsetof(struct ibmvnic_statistics, stat))
131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
132
133 static const struct ibmvnic_stat ibmvnic_stats[] = {
134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
156 };
157
h_reg_sub_crq(unsigned long unit_address,unsigned long token,unsigned long length,unsigned long * number,unsigned long * irq)158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
159 unsigned long length, unsigned long *number,
160 unsigned long *irq)
161 {
162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
163 long rc;
164
165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
166 *number = retbuf[0];
167 *irq = retbuf[1];
168
169 return rc;
170 }
171
alloc_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb,int size)172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
173 struct ibmvnic_long_term_buff *ltb, int size)
174 {
175 struct device *dev = &adapter->vdev->dev;
176 int rc;
177
178 ltb->size = size;
179 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
180 GFP_KERNEL);
181
182 if (!ltb->buff) {
183 dev_err(dev, "Couldn't alloc long term buffer\n");
184 return -ENOMEM;
185 }
186 ltb->map_id = adapter->map_id;
187 adapter->map_id++;
188
189 init_completion(&adapter->fw_done);
190 rc = send_request_map(adapter, ltb->addr,
191 ltb->size, ltb->map_id);
192 if (rc) {
193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
194 return rc;
195 }
196 wait_for_completion(&adapter->fw_done);
197
198 if (adapter->fw_done_rc) {
199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
200 adapter->fw_done_rc);
201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
202 return -1;
203 }
204 return 0;
205 }
206
free_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)207 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
208 struct ibmvnic_long_term_buff *ltb)
209 {
210 struct device *dev = &adapter->vdev->dev;
211
212 if (!ltb->buff)
213 return;
214
215 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
216 adapter->reset_reason != VNIC_RESET_MOBILITY)
217 send_request_unmap(adapter, ltb->map_id);
218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
219 }
220
reset_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
222 struct ibmvnic_long_term_buff *ltb)
223 {
224 int rc;
225
226 memset(ltb->buff, 0, ltb->size);
227
228 init_completion(&adapter->fw_done);
229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
230 if (rc)
231 return rc;
232 wait_for_completion(&adapter->fw_done);
233
234 if (adapter->fw_done_rc) {
235 dev_info(&adapter->vdev->dev,
236 "Reset failed, attempting to free and reallocate buffer\n");
237 free_long_term_buff(adapter, ltb);
238 return alloc_long_term_buff(adapter, ltb, ltb->size);
239 }
240 return 0;
241 }
242
deactivate_rx_pools(struct ibmvnic_adapter * adapter)243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
244 {
245 int i;
246
247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
248 i++)
249 adapter->rx_pool[i].active = 0;
250 }
251
replenish_rx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_pool * pool)252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
253 struct ibmvnic_rx_pool *pool)
254 {
255 int count = pool->size - atomic_read(&pool->available);
256 struct device *dev = &adapter->vdev->dev;
257 int buffers_added = 0;
258 unsigned long lpar_rc;
259 union sub_crq sub_crq;
260 struct sk_buff *skb;
261 unsigned int offset;
262 dma_addr_t dma_addr;
263 unsigned char *dst;
264 u64 *handle_array;
265 int shift = 0;
266 int index;
267 int i;
268
269 if (!pool->active)
270 return;
271
272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
273 be32_to_cpu(adapter->login_rsp_buf->
274 off_rxadd_subcrqs));
275
276 for (i = 0; i < count; ++i) {
277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
278 if (!skb) {
279 dev_err(dev, "Couldn't replenish rx buff\n");
280 adapter->replenish_no_mem++;
281 break;
282 }
283
284 index = pool->free_map[pool->next_free];
285
286 if (pool->rx_buff[index].skb)
287 dev_err(dev, "Inconsistent free_map!\n");
288
289 /* Copy the skb to the long term mapped DMA buffer */
290 offset = index * pool->buff_size;
291 dst = pool->long_term_buff.buff + offset;
292 memset(dst, 0, pool->buff_size);
293 dma_addr = pool->long_term_buff.addr + offset;
294 pool->rx_buff[index].data = dst;
295
296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
297 pool->rx_buff[index].dma = dma_addr;
298 pool->rx_buff[index].skb = skb;
299 pool->rx_buff[index].pool_index = pool->index;
300 pool->rx_buff[index].size = pool->buff_size;
301
302 memset(&sub_crq, 0, sizeof(sub_crq));
303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
304 sub_crq.rx_add.correlator =
305 cpu_to_be64((u64)&pool->rx_buff[index]);
306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
308
309 /* The length field of the sCRQ is defined to be 24 bits so the
310 * buffer size needs to be left shifted by a byte before it is
311 * converted to big endian to prevent the last byte from being
312 * truncated.
313 */
314 #ifdef __LITTLE_ENDIAN__
315 shift = 8;
316 #endif
317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
318
319 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
320 &sub_crq);
321 if (lpar_rc != H_SUCCESS)
322 goto failure;
323
324 buffers_added++;
325 adapter->replenish_add_buff_success++;
326 pool->next_free = (pool->next_free + 1) % pool->size;
327 }
328 atomic_add(buffers_added, &pool->available);
329 return;
330
331 failure:
332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
334 pool->free_map[pool->next_free] = index;
335 pool->rx_buff[index].skb = NULL;
336
337 dev_kfree_skb_any(skb);
338 adapter->replenish_add_buff_failure++;
339 atomic_add(buffers_added, &pool->available);
340
341 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
342 /* Disable buffer pool replenishment and report carrier off if
343 * queue is closed or pending failover.
344 * Firmware guarantees that a signal will be sent to the
345 * driver, triggering a reset.
346 */
347 deactivate_rx_pools(adapter);
348 netif_carrier_off(adapter->netdev);
349 }
350 }
351
replenish_pools(struct ibmvnic_adapter * adapter)352 static void replenish_pools(struct ibmvnic_adapter *adapter)
353 {
354 int i;
355
356 adapter->replenish_task_cycles++;
357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
358 i++) {
359 if (adapter->rx_pool[i].active)
360 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
361 }
362 }
363
release_stats_buffers(struct ibmvnic_adapter * adapter)364 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
365 {
366 kfree(adapter->tx_stats_buffers);
367 kfree(adapter->rx_stats_buffers);
368 adapter->tx_stats_buffers = NULL;
369 adapter->rx_stats_buffers = NULL;
370 }
371
init_stats_buffers(struct ibmvnic_adapter * adapter)372 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
373 {
374 adapter->tx_stats_buffers =
375 kcalloc(IBMVNIC_MAX_QUEUES,
376 sizeof(struct ibmvnic_tx_queue_stats),
377 GFP_KERNEL);
378 if (!adapter->tx_stats_buffers)
379 return -ENOMEM;
380
381 adapter->rx_stats_buffers =
382 kcalloc(IBMVNIC_MAX_QUEUES,
383 sizeof(struct ibmvnic_rx_queue_stats),
384 GFP_KERNEL);
385 if (!adapter->rx_stats_buffers)
386 return -ENOMEM;
387
388 return 0;
389 }
390
release_stats_token(struct ibmvnic_adapter * adapter)391 static void release_stats_token(struct ibmvnic_adapter *adapter)
392 {
393 struct device *dev = &adapter->vdev->dev;
394
395 if (!adapter->stats_token)
396 return;
397
398 dma_unmap_single(dev, adapter->stats_token,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 adapter->stats_token = 0;
402 }
403
init_stats_token(struct ibmvnic_adapter * adapter)404 static int init_stats_token(struct ibmvnic_adapter *adapter)
405 {
406 struct device *dev = &adapter->vdev->dev;
407 dma_addr_t stok;
408
409 stok = dma_map_single(dev, &adapter->stats,
410 sizeof(struct ibmvnic_statistics),
411 DMA_FROM_DEVICE);
412 if (dma_mapping_error(dev, stok)) {
413 dev_err(dev, "Couldn't map stats buffer\n");
414 return -1;
415 }
416
417 adapter->stats_token = stok;
418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
419 return 0;
420 }
421
reset_rx_pools(struct ibmvnic_adapter * adapter)422 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
423 {
424 struct ibmvnic_rx_pool *rx_pool;
425 int rx_scrqs;
426 int i, j, rc;
427 u64 *size_array;
428
429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
431
432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
433 for (i = 0; i < rx_scrqs; i++) {
434 rx_pool = &adapter->rx_pool[i];
435
436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
437
438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
439 free_long_term_buff(adapter, &rx_pool->long_term_buff);
440 rx_pool->buff_size = be64_to_cpu(size_array[i]);
441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
442 rx_pool->size *
443 rx_pool->buff_size);
444 } else {
445 rc = reset_long_term_buff(adapter,
446 &rx_pool->long_term_buff);
447 }
448
449 if (rc)
450 return rc;
451
452 for (j = 0; j < rx_pool->size; j++)
453 rx_pool->free_map[j] = j;
454
455 memset(rx_pool->rx_buff, 0,
456 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
457
458 atomic_set(&rx_pool->available, 0);
459 rx_pool->next_alloc = 0;
460 rx_pool->next_free = 0;
461 rx_pool->active = 1;
462 }
463
464 return 0;
465 }
466
release_rx_pools(struct ibmvnic_adapter * adapter)467 static void release_rx_pools(struct ibmvnic_adapter *adapter)
468 {
469 struct ibmvnic_rx_pool *rx_pool;
470 int i, j;
471
472 if (!adapter->rx_pool)
473 return;
474
475 for (i = 0; i < adapter->num_active_rx_pools; i++) {
476 rx_pool = &adapter->rx_pool[i];
477
478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
479
480 kfree(rx_pool->free_map);
481 free_long_term_buff(adapter, &rx_pool->long_term_buff);
482
483 if (!rx_pool->rx_buff)
484 continue;
485
486 for (j = 0; j < rx_pool->size; j++) {
487 if (rx_pool->rx_buff[j].skb) {
488 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
489 rx_pool->rx_buff[i].skb = NULL;
490 }
491 }
492
493 kfree(rx_pool->rx_buff);
494 }
495
496 kfree(adapter->rx_pool);
497 adapter->rx_pool = NULL;
498 adapter->num_active_rx_pools = 0;
499 }
500
init_rx_pools(struct net_device * netdev)501 static int init_rx_pools(struct net_device *netdev)
502 {
503 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
504 struct device *dev = &adapter->vdev->dev;
505 struct ibmvnic_rx_pool *rx_pool;
506 int rxadd_subcrqs;
507 u64 *size_array;
508 int i, j;
509
510 rxadd_subcrqs =
511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
514
515 adapter->rx_pool = kcalloc(rxadd_subcrqs,
516 sizeof(struct ibmvnic_rx_pool),
517 GFP_KERNEL);
518 if (!adapter->rx_pool) {
519 dev_err(dev, "Failed to allocate rx pools\n");
520 return -1;
521 }
522
523 adapter->num_active_rx_pools = rxadd_subcrqs;
524
525 for (i = 0; i < rxadd_subcrqs; i++) {
526 rx_pool = &adapter->rx_pool[i];
527
528 netdev_dbg(adapter->netdev,
529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
530 i, adapter->req_rx_add_entries_per_subcrq,
531 be64_to_cpu(size_array[i]));
532
533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
534 rx_pool->index = i;
535 rx_pool->buff_size = be64_to_cpu(size_array[i]);
536 rx_pool->active = 1;
537
538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
539 GFP_KERNEL);
540 if (!rx_pool->free_map) {
541 release_rx_pools(adapter);
542 return -1;
543 }
544
545 rx_pool->rx_buff = kcalloc(rx_pool->size,
546 sizeof(struct ibmvnic_rx_buff),
547 GFP_KERNEL);
548 if (!rx_pool->rx_buff) {
549 dev_err(dev, "Couldn't alloc rx buffers\n");
550 release_rx_pools(adapter);
551 return -1;
552 }
553
554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
555 rx_pool->size * rx_pool->buff_size)) {
556 release_rx_pools(adapter);
557 return -1;
558 }
559
560 for (j = 0; j < rx_pool->size; ++j)
561 rx_pool->free_map[j] = j;
562
563 atomic_set(&rx_pool->available, 0);
564 rx_pool->next_alloc = 0;
565 rx_pool->next_free = 0;
566 }
567
568 return 0;
569 }
570
reset_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
572 struct ibmvnic_tx_pool *tx_pool)
573 {
574 int rc, i;
575
576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
577 if (rc)
578 return rc;
579
580 memset(tx_pool->tx_buff, 0,
581 tx_pool->num_buffers *
582 sizeof(struct ibmvnic_tx_buff));
583
584 for (i = 0; i < tx_pool->num_buffers; i++)
585 tx_pool->free_map[i] = i;
586
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
589
590 return 0;
591 }
592
reset_tx_pools(struct ibmvnic_adapter * adapter)593 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
594 {
595 int tx_scrqs;
596 int i, rc;
597
598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
599 for (i = 0; i < tx_scrqs; i++) {
600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
601 if (rc)
602 return rc;
603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
604 if (rc)
605 return rc;
606 }
607
608 return 0;
609 }
610
release_vpd_data(struct ibmvnic_adapter * adapter)611 static void release_vpd_data(struct ibmvnic_adapter *adapter)
612 {
613 if (!adapter->vpd)
614 return;
615
616 kfree(adapter->vpd->buff);
617 kfree(adapter->vpd);
618
619 adapter->vpd = NULL;
620 }
621
release_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
623 struct ibmvnic_tx_pool *tx_pool)
624 {
625 kfree(tx_pool->tx_buff);
626 kfree(tx_pool->free_map);
627 free_long_term_buff(adapter, &tx_pool->long_term_buff);
628 }
629
release_tx_pools(struct ibmvnic_adapter * adapter)630 static void release_tx_pools(struct ibmvnic_adapter *adapter)
631 {
632 int i;
633
634 if (!adapter->tx_pool)
635 return;
636
637 for (i = 0; i < adapter->num_active_tx_pools; i++) {
638 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
639 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
640 }
641
642 kfree(adapter->tx_pool);
643 adapter->tx_pool = NULL;
644 kfree(adapter->tso_pool);
645 adapter->tso_pool = NULL;
646 adapter->num_active_tx_pools = 0;
647 }
648
init_one_tx_pool(struct net_device * netdev,struct ibmvnic_tx_pool * tx_pool,int num_entries,int buf_size)649 static int init_one_tx_pool(struct net_device *netdev,
650 struct ibmvnic_tx_pool *tx_pool,
651 int num_entries, int buf_size)
652 {
653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
654 int i;
655
656 tx_pool->tx_buff = kcalloc(num_entries,
657 sizeof(struct ibmvnic_tx_buff),
658 GFP_KERNEL);
659 if (!tx_pool->tx_buff)
660 return -1;
661
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 num_entries * buf_size))
664 return -1;
665
666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
667 if (!tx_pool->free_map)
668 return -1;
669
670 for (i = 0; i < num_entries; i++)
671 tx_pool->free_map[i] = i;
672
673 tx_pool->consumer_index = 0;
674 tx_pool->producer_index = 0;
675 tx_pool->num_buffers = num_entries;
676 tx_pool->buf_size = buf_size;
677
678 return 0;
679 }
680
init_tx_pools(struct net_device * netdev)681 static int init_tx_pools(struct net_device *netdev)
682 {
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
684 int tx_subcrqs;
685 int i, rc;
686
687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
688 adapter->tx_pool = kcalloc(tx_subcrqs,
689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
690 if (!adapter->tx_pool)
691 return -1;
692
693 adapter->tso_pool = kcalloc(tx_subcrqs,
694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
695 if (!adapter->tso_pool)
696 return -1;
697
698 adapter->num_active_tx_pools = tx_subcrqs;
699
700 for (i = 0; i < tx_subcrqs; i++) {
701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
702 adapter->req_tx_entries_per_subcrq,
703 adapter->req_mtu + VLAN_HLEN);
704 if (rc) {
705 release_tx_pools(adapter);
706 return rc;
707 }
708
709 init_one_tx_pool(netdev, &adapter->tso_pool[i],
710 IBMVNIC_TSO_BUFS,
711 IBMVNIC_TSO_BUF_SZ);
712 if (rc) {
713 release_tx_pools(adapter);
714 return rc;
715 }
716 }
717
718 return 0;
719 }
720
ibmvnic_napi_enable(struct ibmvnic_adapter * adapter)721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
722 {
723 int i;
724
725 if (adapter->napi_enabled)
726 return;
727
728 for (i = 0; i < adapter->req_rx_queues; i++)
729 napi_enable(&adapter->napi[i]);
730
731 adapter->napi_enabled = true;
732 }
733
ibmvnic_napi_disable(struct ibmvnic_adapter * adapter)734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
735 {
736 int i;
737
738 if (!adapter->napi_enabled)
739 return;
740
741 for (i = 0; i < adapter->req_rx_queues; i++) {
742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
743 napi_disable(&adapter->napi[i]);
744 }
745
746 adapter->napi_enabled = false;
747 }
748
init_napi(struct ibmvnic_adapter * adapter)749 static int init_napi(struct ibmvnic_adapter *adapter)
750 {
751 int i;
752
753 adapter->napi = kcalloc(adapter->req_rx_queues,
754 sizeof(struct napi_struct), GFP_KERNEL);
755 if (!adapter->napi)
756 return -ENOMEM;
757
758 for (i = 0; i < adapter->req_rx_queues; i++) {
759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
760 netif_napi_add(adapter->netdev, &adapter->napi[i],
761 ibmvnic_poll, NAPI_POLL_WEIGHT);
762 }
763
764 adapter->num_active_rx_napi = adapter->req_rx_queues;
765 return 0;
766 }
767
release_napi(struct ibmvnic_adapter * adapter)768 static void release_napi(struct ibmvnic_adapter *adapter)
769 {
770 int i;
771
772 if (!adapter->napi)
773 return;
774
775 for (i = 0; i < adapter->num_active_rx_napi; i++) {
776 if (&adapter->napi[i]) {
777 netdev_dbg(adapter->netdev,
778 "Releasing napi[%d]\n", i);
779 netif_napi_del(&adapter->napi[i]);
780 }
781 }
782
783 kfree(adapter->napi);
784 adapter->napi = NULL;
785 adapter->num_active_rx_napi = 0;
786 adapter->napi_enabled = false;
787 }
788
ibmvnic_login(struct net_device * netdev)789 static int ibmvnic_login(struct net_device *netdev)
790 {
791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
792 unsigned long timeout = msecs_to_jiffies(30000);
793 int retry_count = 0;
794 bool retry;
795 int rc;
796
797 do {
798 retry = false;
799 if (retry_count > IBMVNIC_MAX_QUEUES) {
800 netdev_warn(netdev, "Login attempts exceeded\n");
801 return -1;
802 }
803
804 adapter->init_done_rc = 0;
805 reinit_completion(&adapter->init_done);
806 rc = send_login(adapter);
807 if (rc) {
808 netdev_warn(netdev, "Unable to login\n");
809 return rc;
810 }
811
812 if (!wait_for_completion_timeout(&adapter->init_done,
813 timeout)) {
814 netdev_warn(netdev, "Login timed out\n");
815 return -1;
816 }
817
818 if (adapter->init_done_rc == PARTIALSUCCESS) {
819 retry_count++;
820 release_sub_crqs(adapter, 1);
821
822 retry = true;
823 netdev_dbg(netdev,
824 "Received partial success, retrying...\n");
825 adapter->init_done_rc = 0;
826 reinit_completion(&adapter->init_done);
827 send_cap_queries(adapter);
828 if (!wait_for_completion_timeout(&adapter->init_done,
829 timeout)) {
830 netdev_warn(netdev,
831 "Capabilities query timed out\n");
832 return -1;
833 }
834
835 rc = init_sub_crqs(adapter);
836 if (rc) {
837 netdev_warn(netdev,
838 "SCRQ initialization failed\n");
839 return -1;
840 }
841
842 rc = init_sub_crq_irqs(adapter);
843 if (rc) {
844 netdev_warn(netdev,
845 "SCRQ irq initialization failed\n");
846 return -1;
847 }
848 } else if (adapter->init_done_rc) {
849 netdev_warn(netdev, "Adapter login failed\n");
850 return -1;
851 }
852 } while (retry);
853
854 /* handle pending MAC address changes after successful login */
855 if (adapter->mac_change_pending) {
856 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
857 adapter->mac_change_pending = false;
858 }
859
860 return 0;
861 }
862
release_login_buffer(struct ibmvnic_adapter * adapter)863 static void release_login_buffer(struct ibmvnic_adapter *adapter)
864 {
865 kfree(adapter->login_buf);
866 adapter->login_buf = NULL;
867 }
868
release_login_rsp_buffer(struct ibmvnic_adapter * adapter)869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
870 {
871 kfree(adapter->login_rsp_buf);
872 adapter->login_rsp_buf = NULL;
873 }
874
release_resources(struct ibmvnic_adapter * adapter)875 static void release_resources(struct ibmvnic_adapter *adapter)
876 {
877 release_vpd_data(adapter);
878
879 release_tx_pools(adapter);
880 release_rx_pools(adapter);
881
882 release_napi(adapter);
883 release_login_rsp_buffer(adapter);
884 }
885
set_link_state(struct ibmvnic_adapter * adapter,u8 link_state)886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
887 {
888 struct net_device *netdev = adapter->netdev;
889 unsigned long timeout = msecs_to_jiffies(30000);
890 union ibmvnic_crq crq;
891 bool resend;
892 int rc;
893
894 netdev_dbg(netdev, "setting link state %d\n", link_state);
895
896 memset(&crq, 0, sizeof(crq));
897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
899 crq.logical_link_state.link_state = link_state;
900
901 do {
902 resend = false;
903
904 reinit_completion(&adapter->init_done);
905 rc = ibmvnic_send_crq(adapter, &crq);
906 if (rc) {
907 netdev_err(netdev, "Failed to set link state\n");
908 return rc;
909 }
910
911 if (!wait_for_completion_timeout(&adapter->init_done,
912 timeout)) {
913 netdev_err(netdev, "timeout setting link state\n");
914 return -1;
915 }
916
917 if (adapter->init_done_rc == 1) {
918 /* Partuial success, delay and re-send */
919 mdelay(1000);
920 resend = true;
921 } else if (adapter->init_done_rc) {
922 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
923 adapter->init_done_rc);
924 return adapter->init_done_rc;
925 }
926 } while (resend);
927
928 return 0;
929 }
930
set_real_num_queues(struct net_device * netdev)931 static int set_real_num_queues(struct net_device *netdev)
932 {
933 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
934 int rc;
935
936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
937 adapter->req_tx_queues, adapter->req_rx_queues);
938
939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
940 if (rc) {
941 netdev_err(netdev, "failed to set the number of tx queues\n");
942 return rc;
943 }
944
945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
946 if (rc)
947 netdev_err(netdev, "failed to set the number of rx queues\n");
948
949 return rc;
950 }
951
ibmvnic_get_vpd(struct ibmvnic_adapter * adapter)952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
953 {
954 struct device *dev = &adapter->vdev->dev;
955 union ibmvnic_crq crq;
956 int len = 0;
957 int rc;
958
959 if (adapter->vpd->buff)
960 len = adapter->vpd->len;
961
962 init_completion(&adapter->fw_done);
963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
964 crq.get_vpd_size.cmd = GET_VPD_SIZE;
965 rc = ibmvnic_send_crq(adapter, &crq);
966 if (rc)
967 return rc;
968 wait_for_completion(&adapter->fw_done);
969
970 if (!adapter->vpd->len)
971 return -ENODATA;
972
973 if (!adapter->vpd->buff)
974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
975 else if (adapter->vpd->len != len)
976 adapter->vpd->buff =
977 krealloc(adapter->vpd->buff,
978 adapter->vpd->len, GFP_KERNEL);
979
980 if (!adapter->vpd->buff) {
981 dev_err(dev, "Could allocate VPD buffer\n");
982 return -ENOMEM;
983 }
984
985 adapter->vpd->dma_addr =
986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
987 DMA_FROM_DEVICE);
988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
989 dev_err(dev, "Could not map VPD buffer\n");
990 kfree(adapter->vpd->buff);
991 adapter->vpd->buff = NULL;
992 return -ENOMEM;
993 }
994
995 reinit_completion(&adapter->fw_done);
996 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
997 crq.get_vpd.cmd = GET_VPD;
998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1000 rc = ibmvnic_send_crq(adapter, &crq);
1001 if (rc) {
1002 kfree(adapter->vpd->buff);
1003 adapter->vpd->buff = NULL;
1004 return rc;
1005 }
1006 wait_for_completion(&adapter->fw_done);
1007
1008 return 0;
1009 }
1010
init_resources(struct ibmvnic_adapter * adapter)1011 static int init_resources(struct ibmvnic_adapter *adapter)
1012 {
1013 struct net_device *netdev = adapter->netdev;
1014 int rc;
1015
1016 rc = set_real_num_queues(netdev);
1017 if (rc)
1018 return rc;
1019
1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1021 if (!adapter->vpd)
1022 return -ENOMEM;
1023
1024 /* Vital Product Data (VPD) */
1025 rc = ibmvnic_get_vpd(adapter);
1026 if (rc) {
1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1028 return rc;
1029 }
1030
1031 adapter->map_id = 1;
1032
1033 rc = init_napi(adapter);
1034 if (rc)
1035 return rc;
1036
1037 send_map_query(adapter);
1038
1039 rc = init_rx_pools(netdev);
1040 if (rc)
1041 return rc;
1042
1043 rc = init_tx_pools(netdev);
1044 return rc;
1045 }
1046
__ibmvnic_open(struct net_device * netdev)1047 static int __ibmvnic_open(struct net_device *netdev)
1048 {
1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1050 enum vnic_state prev_state = adapter->state;
1051 int i, rc;
1052
1053 adapter->state = VNIC_OPENING;
1054 replenish_pools(adapter);
1055 ibmvnic_napi_enable(adapter);
1056
1057 /* We're ready to receive frames, enable the sub-crq interrupts and
1058 * set the logical link state to up
1059 */
1060 for (i = 0; i < adapter->req_rx_queues; i++) {
1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1062 if (prev_state == VNIC_CLOSED)
1063 enable_irq(adapter->rx_scrq[i]->irq);
1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1065 }
1066
1067 for (i = 0; i < adapter->req_tx_queues; i++) {
1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1069 if (prev_state == VNIC_CLOSED)
1070 enable_irq(adapter->tx_scrq[i]->irq);
1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1072 }
1073
1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1075 if (rc) {
1076 for (i = 0; i < adapter->req_rx_queues; i++)
1077 napi_disable(&adapter->napi[i]);
1078 release_resources(adapter);
1079 return rc;
1080 }
1081
1082 netif_tx_start_all_queues(netdev);
1083
1084 if (prev_state == VNIC_CLOSED) {
1085 for (i = 0; i < adapter->req_rx_queues; i++)
1086 napi_schedule(&adapter->napi[i]);
1087 }
1088
1089 adapter->state = VNIC_OPEN;
1090 return rc;
1091 }
1092
ibmvnic_open(struct net_device * netdev)1093 static int ibmvnic_open(struct net_device *netdev)
1094 {
1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1096 int rc;
1097
1098 /* If device failover is pending, just set device state and return.
1099 * Device operation will be handled by reset routine.
1100 */
1101 if (adapter->failover_pending) {
1102 adapter->state = VNIC_OPEN;
1103 return 0;
1104 }
1105
1106 mutex_lock(&adapter->reset_lock);
1107
1108 if (adapter->state != VNIC_CLOSED) {
1109 rc = ibmvnic_login(netdev);
1110 if (rc) {
1111 mutex_unlock(&adapter->reset_lock);
1112 return rc;
1113 }
1114
1115 rc = init_resources(adapter);
1116 if (rc) {
1117 netdev_err(netdev, "failed to initialize resources\n");
1118 release_resources(adapter);
1119 mutex_unlock(&adapter->reset_lock);
1120 return rc;
1121 }
1122 }
1123
1124 rc = __ibmvnic_open(netdev);
1125 netif_carrier_on(netdev);
1126
1127 mutex_unlock(&adapter->reset_lock);
1128
1129 return rc;
1130 }
1131
clean_rx_pools(struct ibmvnic_adapter * adapter)1132 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1133 {
1134 struct ibmvnic_rx_pool *rx_pool;
1135 struct ibmvnic_rx_buff *rx_buff;
1136 u64 rx_entries;
1137 int rx_scrqs;
1138 int i, j;
1139
1140 if (!adapter->rx_pool)
1141 return;
1142
1143 rx_scrqs = adapter->num_active_rx_pools;
1144 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1145
1146 /* Free any remaining skbs in the rx buffer pools */
1147 for (i = 0; i < rx_scrqs; i++) {
1148 rx_pool = &adapter->rx_pool[i];
1149 if (!rx_pool || !rx_pool->rx_buff)
1150 continue;
1151
1152 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1153 for (j = 0; j < rx_entries; j++) {
1154 rx_buff = &rx_pool->rx_buff[j];
1155 if (rx_buff && rx_buff->skb) {
1156 dev_kfree_skb_any(rx_buff->skb);
1157 rx_buff->skb = NULL;
1158 }
1159 }
1160 }
1161 }
1162
clean_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)1163 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1164 struct ibmvnic_tx_pool *tx_pool)
1165 {
1166 struct ibmvnic_tx_buff *tx_buff;
1167 u64 tx_entries;
1168 int i;
1169
1170 if (!tx_pool || !tx_pool->tx_buff)
1171 return;
1172
1173 tx_entries = tx_pool->num_buffers;
1174
1175 for (i = 0; i < tx_entries; i++) {
1176 tx_buff = &tx_pool->tx_buff[i];
1177 if (tx_buff && tx_buff->skb) {
1178 dev_kfree_skb_any(tx_buff->skb);
1179 tx_buff->skb = NULL;
1180 }
1181 }
1182 }
1183
clean_tx_pools(struct ibmvnic_adapter * adapter)1184 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1185 {
1186 int tx_scrqs;
1187 int i;
1188
1189 if (!adapter->tx_pool || !adapter->tso_pool)
1190 return;
1191
1192 tx_scrqs = adapter->num_active_tx_pools;
1193
1194 /* Free any remaining skbs in the tx buffer pools */
1195 for (i = 0; i < tx_scrqs; i++) {
1196 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1197 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1198 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1199 }
1200 }
1201
ibmvnic_disable_irqs(struct ibmvnic_adapter * adapter)1202 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1203 {
1204 struct net_device *netdev = adapter->netdev;
1205 int i;
1206
1207 if (adapter->tx_scrq) {
1208 for (i = 0; i < adapter->req_tx_queues; i++)
1209 if (adapter->tx_scrq[i]->irq) {
1210 netdev_dbg(netdev,
1211 "Disabling tx_scrq[%d] irq\n", i);
1212 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1213 disable_irq(adapter->tx_scrq[i]->irq);
1214 }
1215 }
1216
1217 if (adapter->rx_scrq) {
1218 for (i = 0; i < adapter->req_rx_queues; i++) {
1219 if (adapter->rx_scrq[i]->irq) {
1220 netdev_dbg(netdev,
1221 "Disabling rx_scrq[%d] irq\n", i);
1222 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1223 disable_irq(adapter->rx_scrq[i]->irq);
1224 }
1225 }
1226 }
1227 }
1228
ibmvnic_cleanup(struct net_device * netdev)1229 static void ibmvnic_cleanup(struct net_device *netdev)
1230 {
1231 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1232
1233 /* ensure that transmissions are stopped if called by do_reset */
1234 if (adapter->resetting)
1235 netif_tx_disable(netdev);
1236 else
1237 netif_tx_stop_all_queues(netdev);
1238
1239 ibmvnic_napi_disable(adapter);
1240 ibmvnic_disable_irqs(adapter);
1241
1242 clean_rx_pools(adapter);
1243 clean_tx_pools(adapter);
1244 }
1245
__ibmvnic_close(struct net_device * netdev)1246 static int __ibmvnic_close(struct net_device *netdev)
1247 {
1248 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1249 int rc = 0;
1250
1251 adapter->state = VNIC_CLOSING;
1252 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1253 if (rc)
1254 return rc;
1255 adapter->state = VNIC_CLOSED;
1256 return 0;
1257 }
1258
ibmvnic_close(struct net_device * netdev)1259 static int ibmvnic_close(struct net_device *netdev)
1260 {
1261 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1262 int rc;
1263
1264 /* If device failover is pending, just set device state and return.
1265 * Device operation will be handled by reset routine.
1266 */
1267 if (adapter->failover_pending) {
1268 adapter->state = VNIC_CLOSED;
1269 return 0;
1270 }
1271
1272 mutex_lock(&adapter->reset_lock);
1273 rc = __ibmvnic_close(netdev);
1274 ibmvnic_cleanup(netdev);
1275 mutex_unlock(&adapter->reset_lock);
1276
1277 return rc;
1278 }
1279
1280 /**
1281 * build_hdr_data - creates L2/L3/L4 header data buffer
1282 * @hdr_field - bitfield determining needed headers
1283 * @skb - socket buffer
1284 * @hdr_len - array of header lengths
1285 * @tot_len - total length of data
1286 *
1287 * Reads hdr_field to determine which headers are needed by firmware.
1288 * Builds a buffer containing these headers. Saves individual header
1289 * lengths and total buffer length to be used to build descriptors.
1290 */
build_hdr_data(u8 hdr_field,struct sk_buff * skb,int * hdr_len,u8 * hdr_data)1291 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1292 int *hdr_len, u8 *hdr_data)
1293 {
1294 int len = 0;
1295 u8 *hdr;
1296
1297 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1298 hdr_len[0] = sizeof(struct vlan_ethhdr);
1299 else
1300 hdr_len[0] = sizeof(struct ethhdr);
1301
1302 if (skb->protocol == htons(ETH_P_IP)) {
1303 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1304 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1305 hdr_len[2] = tcp_hdrlen(skb);
1306 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1307 hdr_len[2] = sizeof(struct udphdr);
1308 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1309 hdr_len[1] = sizeof(struct ipv6hdr);
1310 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1311 hdr_len[2] = tcp_hdrlen(skb);
1312 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1313 hdr_len[2] = sizeof(struct udphdr);
1314 } else if (skb->protocol == htons(ETH_P_ARP)) {
1315 hdr_len[1] = arp_hdr_len(skb->dev);
1316 hdr_len[2] = 0;
1317 }
1318
1319 memset(hdr_data, 0, 120);
1320 if ((hdr_field >> 6) & 1) {
1321 hdr = skb_mac_header(skb);
1322 memcpy(hdr_data, hdr, hdr_len[0]);
1323 len += hdr_len[0];
1324 }
1325
1326 if ((hdr_field >> 5) & 1) {
1327 hdr = skb_network_header(skb);
1328 memcpy(hdr_data + len, hdr, hdr_len[1]);
1329 len += hdr_len[1];
1330 }
1331
1332 if ((hdr_field >> 4) & 1) {
1333 hdr = skb_transport_header(skb);
1334 memcpy(hdr_data + len, hdr, hdr_len[2]);
1335 len += hdr_len[2];
1336 }
1337 return len;
1338 }
1339
1340 /**
1341 * create_hdr_descs - create header and header extension descriptors
1342 * @hdr_field - bitfield determining needed headers
1343 * @data - buffer containing header data
1344 * @len - length of data buffer
1345 * @hdr_len - array of individual header lengths
1346 * @scrq_arr - descriptor array
1347 *
1348 * Creates header and, if needed, header extension descriptors and
1349 * places them in a descriptor array, scrq_arr
1350 */
1351
create_hdr_descs(u8 hdr_field,u8 * hdr_data,int len,int * hdr_len,union sub_crq * scrq_arr)1352 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1353 union sub_crq *scrq_arr)
1354 {
1355 union sub_crq hdr_desc;
1356 int tmp_len = len;
1357 int num_descs = 0;
1358 u8 *data, *cur;
1359 int tmp;
1360
1361 while (tmp_len > 0) {
1362 cur = hdr_data + len - tmp_len;
1363
1364 memset(&hdr_desc, 0, sizeof(hdr_desc));
1365 if (cur != hdr_data) {
1366 data = hdr_desc.hdr_ext.data;
1367 tmp = tmp_len > 29 ? 29 : tmp_len;
1368 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1369 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1370 hdr_desc.hdr_ext.len = tmp;
1371 } else {
1372 data = hdr_desc.hdr.data;
1373 tmp = tmp_len > 24 ? 24 : tmp_len;
1374 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1375 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1376 hdr_desc.hdr.len = tmp;
1377 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1378 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1379 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1380 hdr_desc.hdr.flag = hdr_field << 1;
1381 }
1382 memcpy(data, cur, tmp);
1383 tmp_len -= tmp;
1384 *scrq_arr = hdr_desc;
1385 scrq_arr++;
1386 num_descs++;
1387 }
1388
1389 return num_descs;
1390 }
1391
1392 /**
1393 * build_hdr_descs_arr - build a header descriptor array
1394 * @skb - socket buffer
1395 * @num_entries - number of descriptors to be sent
1396 * @subcrq - first TX descriptor
1397 * @hdr_field - bit field determining which headers will be sent
1398 *
1399 * This function will build a TX descriptor array with applicable
1400 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1401 */
1402
build_hdr_descs_arr(struct ibmvnic_tx_buff * txbuff,int * num_entries,u8 hdr_field)1403 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1404 int *num_entries, u8 hdr_field)
1405 {
1406 int hdr_len[3] = {0, 0, 0};
1407 int tot_len;
1408 u8 *hdr_data = txbuff->hdr_data;
1409
1410 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1411 txbuff->hdr_data);
1412 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1413 txbuff->indir_arr + 1);
1414 }
1415
ibmvnic_xmit_workarounds(struct sk_buff * skb,struct net_device * netdev)1416 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1417 struct net_device *netdev)
1418 {
1419 /* For some backing devices, mishandling of small packets
1420 * can result in a loss of connection or TX stall. Device
1421 * architects recommend that no packet should be smaller
1422 * than the minimum MTU value provided to the driver, so
1423 * pad any packets to that length
1424 */
1425 if (skb->len < netdev->min_mtu)
1426 return skb_put_padto(skb, netdev->min_mtu);
1427
1428 return 0;
1429 }
1430
ibmvnic_xmit(struct sk_buff * skb,struct net_device * netdev)1431 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1432 {
1433 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1434 int queue_num = skb_get_queue_mapping(skb);
1435 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1436 struct device *dev = &adapter->vdev->dev;
1437 struct ibmvnic_tx_buff *tx_buff = NULL;
1438 struct ibmvnic_sub_crq_queue *tx_scrq;
1439 struct ibmvnic_tx_pool *tx_pool;
1440 unsigned int tx_send_failed = 0;
1441 unsigned int tx_map_failed = 0;
1442 unsigned int tx_dropped = 0;
1443 unsigned int tx_packets = 0;
1444 unsigned int tx_bytes = 0;
1445 dma_addr_t data_dma_addr;
1446 struct netdev_queue *txq;
1447 unsigned long lpar_rc;
1448 union sub_crq tx_crq;
1449 unsigned int offset;
1450 int num_entries = 1;
1451 unsigned char *dst;
1452 u64 *handle_array;
1453 int index = 0;
1454 u8 proto = 0;
1455 int ret = 0;
1456
1457 if (adapter->resetting) {
1458 if (!netif_subqueue_stopped(netdev, skb))
1459 netif_stop_subqueue(netdev, queue_num);
1460 dev_kfree_skb_any(skb);
1461
1462 tx_send_failed++;
1463 tx_dropped++;
1464 ret = NETDEV_TX_OK;
1465 goto out;
1466 }
1467
1468 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1469 tx_dropped++;
1470 tx_send_failed++;
1471 ret = NETDEV_TX_OK;
1472 goto out;
1473 }
1474 if (skb_is_gso(skb))
1475 tx_pool = &adapter->tso_pool[queue_num];
1476 else
1477 tx_pool = &adapter->tx_pool[queue_num];
1478
1479 tx_scrq = adapter->tx_scrq[queue_num];
1480 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1481 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1482 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1483
1484 index = tx_pool->free_map[tx_pool->consumer_index];
1485
1486 if (index == IBMVNIC_INVALID_MAP) {
1487 dev_kfree_skb_any(skb);
1488 tx_send_failed++;
1489 tx_dropped++;
1490 ret = NETDEV_TX_OK;
1491 goto out;
1492 }
1493
1494 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1495
1496 offset = index * tx_pool->buf_size;
1497 dst = tx_pool->long_term_buff.buff + offset;
1498 memset(dst, 0, tx_pool->buf_size);
1499 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1500
1501 if (skb_shinfo(skb)->nr_frags) {
1502 int cur, i;
1503
1504 /* Copy the head */
1505 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1506 cur = skb_headlen(skb);
1507
1508 /* Copy the frags */
1509 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1510 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1511
1512 memcpy(dst + cur,
1513 page_address(skb_frag_page(frag)) +
1514 frag->page_offset, skb_frag_size(frag));
1515 cur += skb_frag_size(frag);
1516 }
1517 } else {
1518 skb_copy_from_linear_data(skb, dst, skb->len);
1519 }
1520
1521 tx_pool->consumer_index =
1522 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1523
1524 tx_buff = &tx_pool->tx_buff[index];
1525 tx_buff->skb = skb;
1526 tx_buff->data_dma[0] = data_dma_addr;
1527 tx_buff->data_len[0] = skb->len;
1528 tx_buff->index = index;
1529 tx_buff->pool_index = queue_num;
1530 tx_buff->last_frag = true;
1531
1532 memset(&tx_crq, 0, sizeof(tx_crq));
1533 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1534 tx_crq.v1.type = IBMVNIC_TX_DESC;
1535 tx_crq.v1.n_crq_elem = 1;
1536 tx_crq.v1.n_sge = 1;
1537 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1538
1539 if (skb_is_gso(skb))
1540 tx_crq.v1.correlator =
1541 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1542 else
1543 tx_crq.v1.correlator = cpu_to_be32(index);
1544 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1545 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1546 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1547
1548 if (adapter->vlan_header_insertion) {
1549 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1550 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1551 }
1552
1553 if (skb->protocol == htons(ETH_P_IP)) {
1554 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1555 proto = ip_hdr(skb)->protocol;
1556 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1557 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1558 proto = ipv6_hdr(skb)->nexthdr;
1559 }
1560
1561 if (proto == IPPROTO_TCP)
1562 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1563 else if (proto == IPPROTO_UDP)
1564 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1565
1566 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1567 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1568 hdrs += 2;
1569 }
1570 if (skb_is_gso(skb)) {
1571 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1572 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1573 hdrs += 2;
1574 }
1575 /* determine if l2/3/4 headers are sent to firmware */
1576 if ((*hdrs >> 7) & 1) {
1577 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1578 tx_crq.v1.n_crq_elem = num_entries;
1579 tx_buff->num_entries = num_entries;
1580 tx_buff->indir_arr[0] = tx_crq;
1581 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1582 sizeof(tx_buff->indir_arr),
1583 DMA_TO_DEVICE);
1584 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1585 dev_kfree_skb_any(skb);
1586 tx_buff->skb = NULL;
1587 if (!firmware_has_feature(FW_FEATURE_CMO))
1588 dev_err(dev, "tx: unable to map descriptor array\n");
1589 tx_map_failed++;
1590 tx_dropped++;
1591 ret = NETDEV_TX_OK;
1592 goto tx_err_out;
1593 }
1594 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1595 (u64)tx_buff->indir_dma,
1596 (u64)num_entries);
1597 } else {
1598 tx_buff->num_entries = num_entries;
1599 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1600 &tx_crq);
1601 }
1602 if (lpar_rc != H_SUCCESS) {
1603 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1604 dev_err_ratelimited(dev, "tx: send failed\n");
1605 dev_kfree_skb_any(skb);
1606 tx_buff->skb = NULL;
1607
1608 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1609 /* Disable TX and report carrier off if queue is closed
1610 * or pending failover.
1611 * Firmware guarantees that a signal will be sent to the
1612 * driver, triggering a reset or some other action.
1613 */
1614 netif_tx_stop_all_queues(netdev);
1615 netif_carrier_off(netdev);
1616 }
1617
1618 tx_send_failed++;
1619 tx_dropped++;
1620 ret = NETDEV_TX_OK;
1621 goto tx_err_out;
1622 }
1623
1624 if (atomic_add_return(num_entries, &tx_scrq->used)
1625 >= adapter->req_tx_entries_per_subcrq) {
1626 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1627 netif_stop_subqueue(netdev, queue_num);
1628 }
1629
1630 tx_packets++;
1631 tx_bytes += skb->len;
1632 txq->trans_start = jiffies;
1633 ret = NETDEV_TX_OK;
1634 goto out;
1635
1636 tx_err_out:
1637 /* roll back consumer index and map array*/
1638 if (tx_pool->consumer_index == 0)
1639 tx_pool->consumer_index =
1640 tx_pool->num_buffers - 1;
1641 else
1642 tx_pool->consumer_index--;
1643 tx_pool->free_map[tx_pool->consumer_index] = index;
1644 out:
1645 netdev->stats.tx_dropped += tx_dropped;
1646 netdev->stats.tx_bytes += tx_bytes;
1647 netdev->stats.tx_packets += tx_packets;
1648 adapter->tx_send_failed += tx_send_failed;
1649 adapter->tx_map_failed += tx_map_failed;
1650 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1651 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1652 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1653
1654 return ret;
1655 }
1656
ibmvnic_set_multi(struct net_device * netdev)1657 static void ibmvnic_set_multi(struct net_device *netdev)
1658 {
1659 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1660 struct netdev_hw_addr *ha;
1661 union ibmvnic_crq crq;
1662
1663 memset(&crq, 0, sizeof(crq));
1664 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1665 crq.request_capability.cmd = REQUEST_CAPABILITY;
1666
1667 if (netdev->flags & IFF_PROMISC) {
1668 if (!adapter->promisc_supported)
1669 return;
1670 } else {
1671 if (netdev->flags & IFF_ALLMULTI) {
1672 /* Accept all multicast */
1673 memset(&crq, 0, sizeof(crq));
1674 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1675 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1676 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1677 ibmvnic_send_crq(adapter, &crq);
1678 } else if (netdev_mc_empty(netdev)) {
1679 /* Reject all multicast */
1680 memset(&crq, 0, sizeof(crq));
1681 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1682 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1683 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1684 ibmvnic_send_crq(adapter, &crq);
1685 } else {
1686 /* Accept one or more multicast(s) */
1687 netdev_for_each_mc_addr(ha, netdev) {
1688 memset(&crq, 0, sizeof(crq));
1689 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1690 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1691 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1692 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1693 ha->addr);
1694 ibmvnic_send_crq(adapter, &crq);
1695 }
1696 }
1697 }
1698 }
1699
__ibmvnic_set_mac(struct net_device * netdev,struct sockaddr * p)1700 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1701 {
1702 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1703 struct sockaddr *addr = p;
1704 union ibmvnic_crq crq;
1705 int rc;
1706
1707 if (!is_valid_ether_addr(addr->sa_data))
1708 return -EADDRNOTAVAIL;
1709
1710 memset(&crq, 0, sizeof(crq));
1711 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1712 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1713 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1714
1715 init_completion(&adapter->fw_done);
1716 rc = ibmvnic_send_crq(adapter, &crq);
1717 if (rc)
1718 return rc;
1719 wait_for_completion(&adapter->fw_done);
1720 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1721 return adapter->fw_done_rc ? -EIO : 0;
1722 }
1723
ibmvnic_set_mac(struct net_device * netdev,void * p)1724 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1725 {
1726 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1727 struct sockaddr *addr = p;
1728 int rc;
1729
1730 if (adapter->state == VNIC_PROBED) {
1731 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1732 adapter->mac_change_pending = true;
1733 return 0;
1734 }
1735
1736 rc = __ibmvnic_set_mac(netdev, addr);
1737
1738 return rc;
1739 }
1740
1741 /**
1742 * do_reset returns zero if we are able to keep processing reset events, or
1743 * non-zero if we hit a fatal error and must halt.
1744 */
do_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)1745 static int do_reset(struct ibmvnic_adapter *adapter,
1746 struct ibmvnic_rwi *rwi, u32 reset_state)
1747 {
1748 u64 old_num_rx_queues, old_num_tx_queues;
1749 struct net_device *netdev = adapter->netdev;
1750 int i, rc;
1751
1752 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1753 rwi->reset_reason);
1754
1755 netif_carrier_off(netdev);
1756 adapter->reset_reason = rwi->reset_reason;
1757
1758 old_num_rx_queues = adapter->req_rx_queues;
1759 old_num_tx_queues = adapter->req_tx_queues;
1760
1761 ibmvnic_cleanup(netdev);
1762
1763 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1764 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1765 rc = __ibmvnic_close(netdev);
1766 if (rc)
1767 return rc;
1768 }
1769
1770 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1771 adapter->wait_for_reset) {
1772 release_resources(adapter);
1773 release_sub_crqs(adapter, 1);
1774 release_crq_queue(adapter);
1775 }
1776
1777 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1778 /* remove the closed state so when we call open it appears
1779 * we are coming from the probed state.
1780 */
1781 adapter->state = VNIC_PROBED;
1782
1783 if (adapter->wait_for_reset) {
1784 rc = init_crq_queue(adapter);
1785 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1786 rc = ibmvnic_reenable_crq_queue(adapter);
1787 release_sub_crqs(adapter, 1);
1788 } else {
1789 rc = ibmvnic_reset_crq(adapter);
1790 if (!rc)
1791 rc = vio_enable_interrupts(adapter->vdev);
1792 }
1793
1794 if (rc) {
1795 netdev_err(adapter->netdev,
1796 "Couldn't initialize crq. rc=%d\n", rc);
1797 return rc;
1798 }
1799
1800 rc = ibmvnic_reset_init(adapter);
1801 if (rc)
1802 return IBMVNIC_INIT_FAILED;
1803
1804 /* If the adapter was in PROBE state prior to the reset,
1805 * exit here.
1806 */
1807 if (reset_state == VNIC_PROBED)
1808 return 0;
1809
1810 rc = ibmvnic_login(netdev);
1811 if (rc) {
1812 adapter->state = reset_state;
1813 return rc;
1814 }
1815
1816 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1817 adapter->wait_for_reset) {
1818 rc = init_resources(adapter);
1819 if (rc)
1820 return rc;
1821 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1822 adapter->req_tx_queues != old_num_tx_queues) {
1823 adapter->map_id = 1;
1824 release_rx_pools(adapter);
1825 release_tx_pools(adapter);
1826 rc = init_rx_pools(netdev);
1827 if (rc)
1828 return rc;
1829 rc = init_tx_pools(netdev);
1830 if (rc)
1831 return rc;
1832
1833 release_napi(adapter);
1834 rc = init_napi(adapter);
1835 if (rc)
1836 return rc;
1837 } else {
1838 rc = reset_tx_pools(adapter);
1839 if (rc)
1840 return rc;
1841
1842 rc = reset_rx_pools(adapter);
1843 if (rc)
1844 return rc;
1845 }
1846 ibmvnic_disable_irqs(adapter);
1847 }
1848 adapter->state = VNIC_CLOSED;
1849
1850 if (reset_state == VNIC_CLOSED)
1851 return 0;
1852
1853 rc = __ibmvnic_open(netdev);
1854 if (rc) {
1855 if (list_empty(&adapter->rwi_list))
1856 adapter->state = VNIC_CLOSED;
1857 else
1858 adapter->state = reset_state;
1859
1860 return 0;
1861 }
1862
1863 /* kick napi */
1864 for (i = 0; i < adapter->req_rx_queues; i++)
1865 napi_schedule(&adapter->napi[i]);
1866
1867 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1868 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1869 netdev_notify_peers(netdev);
1870
1871 netif_carrier_on(netdev);
1872
1873 return 0;
1874 }
1875
do_hard_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)1876 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1877 struct ibmvnic_rwi *rwi, u32 reset_state)
1878 {
1879 struct net_device *netdev = adapter->netdev;
1880 int rc;
1881
1882 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1883 rwi->reset_reason);
1884
1885 netif_carrier_off(netdev);
1886 adapter->reset_reason = rwi->reset_reason;
1887
1888 ibmvnic_cleanup(netdev);
1889 release_resources(adapter);
1890 release_sub_crqs(adapter, 0);
1891 release_crq_queue(adapter);
1892
1893 /* remove the closed state so when we call open it appears
1894 * we are coming from the probed state.
1895 */
1896 adapter->state = VNIC_PROBED;
1897
1898 rc = init_crq_queue(adapter);
1899 if (rc) {
1900 netdev_err(adapter->netdev,
1901 "Couldn't initialize crq. rc=%d\n", rc);
1902 return rc;
1903 }
1904
1905 rc = ibmvnic_init(adapter);
1906 if (rc)
1907 return rc;
1908
1909 /* If the adapter was in PROBE state prior to the reset,
1910 * exit here.
1911 */
1912 if (reset_state == VNIC_PROBED)
1913 return 0;
1914
1915 rc = ibmvnic_login(netdev);
1916 if (rc) {
1917 adapter->state = VNIC_PROBED;
1918 return 0;
1919 }
1920 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1921 * unless wait_for_reset is set, in which case the rtnl lock
1922 * has already been taken before initializing the reset
1923 */
1924 if (!adapter->wait_for_reset) {
1925 rtnl_lock();
1926 rc = init_resources(adapter);
1927 rtnl_unlock();
1928 } else {
1929 rc = init_resources(adapter);
1930 }
1931 if (rc)
1932 return rc;
1933
1934 ibmvnic_disable_irqs(adapter);
1935 adapter->state = VNIC_CLOSED;
1936
1937 if (reset_state == VNIC_CLOSED)
1938 return 0;
1939
1940 rc = __ibmvnic_open(netdev);
1941 if (rc) {
1942 if (list_empty(&adapter->rwi_list))
1943 adapter->state = VNIC_CLOSED;
1944 else
1945 adapter->state = reset_state;
1946
1947 return 0;
1948 }
1949
1950 netif_carrier_on(netdev);
1951
1952 return 0;
1953 }
1954
get_next_rwi(struct ibmvnic_adapter * adapter)1955 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1956 {
1957 struct ibmvnic_rwi *rwi;
1958
1959 mutex_lock(&adapter->rwi_lock);
1960
1961 if (!list_empty(&adapter->rwi_list)) {
1962 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1963 list);
1964 list_del(&rwi->list);
1965 } else {
1966 rwi = NULL;
1967 }
1968
1969 mutex_unlock(&adapter->rwi_lock);
1970 return rwi;
1971 }
1972
free_all_rwi(struct ibmvnic_adapter * adapter)1973 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1974 {
1975 struct ibmvnic_rwi *rwi;
1976
1977 rwi = get_next_rwi(adapter);
1978 while (rwi) {
1979 kfree(rwi);
1980 rwi = get_next_rwi(adapter);
1981 }
1982 }
1983
__ibmvnic_reset(struct work_struct * work)1984 static void __ibmvnic_reset(struct work_struct *work)
1985 {
1986 struct ibmvnic_rwi *rwi;
1987 struct ibmvnic_adapter *adapter;
1988 struct net_device *netdev;
1989 u32 reset_state;
1990 int rc = 0;
1991
1992 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1993 netdev = adapter->netdev;
1994
1995 mutex_lock(&adapter->reset_lock);
1996 reset_state = adapter->state;
1997
1998 rwi = get_next_rwi(adapter);
1999 while (rwi) {
2000 if (adapter->force_reset_recovery) {
2001 adapter->force_reset_recovery = false;
2002 rc = do_hard_reset(adapter, rwi, reset_state);
2003 } else {
2004 rc = do_reset(adapter, rwi, reset_state);
2005 }
2006 kfree(rwi);
2007 if (rc && rc != IBMVNIC_INIT_FAILED &&
2008 !adapter->force_reset_recovery)
2009 break;
2010
2011 rwi = get_next_rwi(adapter);
2012 }
2013
2014 if (adapter->wait_for_reset) {
2015 adapter->wait_for_reset = false;
2016 adapter->reset_done_rc = rc;
2017 complete(&adapter->reset_done);
2018 }
2019
2020 if (rc) {
2021 netdev_dbg(adapter->netdev, "Reset failed\n");
2022 free_all_rwi(adapter);
2023 mutex_unlock(&adapter->reset_lock);
2024 return;
2025 }
2026
2027 adapter->resetting = false;
2028 mutex_unlock(&adapter->reset_lock);
2029 }
2030
ibmvnic_reset(struct ibmvnic_adapter * adapter,enum ibmvnic_reset_reason reason)2031 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2032 enum ibmvnic_reset_reason reason)
2033 {
2034 struct list_head *entry, *tmp_entry;
2035 struct ibmvnic_rwi *rwi, *tmp;
2036 struct net_device *netdev = adapter->netdev;
2037 int ret;
2038
2039 if (adapter->state == VNIC_REMOVING ||
2040 adapter->state == VNIC_REMOVED ||
2041 adapter->failover_pending) {
2042 ret = EBUSY;
2043 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2044 goto err;
2045 }
2046
2047 if (adapter->state == VNIC_PROBING) {
2048 netdev_warn(netdev, "Adapter reset during probe\n");
2049 ret = adapter->init_done_rc = EAGAIN;
2050 goto err;
2051 }
2052
2053 mutex_lock(&adapter->rwi_lock);
2054
2055 list_for_each(entry, &adapter->rwi_list) {
2056 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2057 if (tmp->reset_reason == reason) {
2058 netdev_dbg(netdev, "Skipping matching reset\n");
2059 mutex_unlock(&adapter->rwi_lock);
2060 ret = EBUSY;
2061 goto err;
2062 }
2063 }
2064
2065 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
2066 if (!rwi) {
2067 mutex_unlock(&adapter->rwi_lock);
2068 ibmvnic_close(netdev);
2069 ret = ENOMEM;
2070 goto err;
2071 }
2072 /* if we just received a transport event,
2073 * flush reset queue and process this reset
2074 */
2075 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2076 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2077 list_del(entry);
2078 }
2079 rwi->reset_reason = reason;
2080 list_add_tail(&rwi->list, &adapter->rwi_list);
2081 mutex_unlock(&adapter->rwi_lock);
2082 adapter->resetting = true;
2083 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2084 schedule_work(&adapter->ibmvnic_reset);
2085
2086 return 0;
2087 err:
2088 if (adapter->wait_for_reset)
2089 adapter->wait_for_reset = false;
2090 return -ret;
2091 }
2092
ibmvnic_tx_timeout(struct net_device * dev)2093 static void ibmvnic_tx_timeout(struct net_device *dev)
2094 {
2095 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2096
2097 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2098 }
2099
remove_buff_from_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_buff * rx_buff)2100 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2101 struct ibmvnic_rx_buff *rx_buff)
2102 {
2103 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2104
2105 rx_buff->skb = NULL;
2106
2107 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2108 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2109
2110 atomic_dec(&pool->available);
2111 }
2112
ibmvnic_poll(struct napi_struct * napi,int budget)2113 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2114 {
2115 struct net_device *netdev = napi->dev;
2116 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2117 int scrq_num = (int)(napi - adapter->napi);
2118 int frames_processed = 0;
2119
2120 restart_poll:
2121 while (frames_processed < budget) {
2122 struct sk_buff *skb;
2123 struct ibmvnic_rx_buff *rx_buff;
2124 union sub_crq *next;
2125 u32 length;
2126 u16 offset;
2127 u8 flags = 0;
2128
2129 if (unlikely(adapter->resetting &&
2130 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2131 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2132 napi_complete_done(napi, frames_processed);
2133 return frames_processed;
2134 }
2135
2136 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2137 break;
2138 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2139 rx_buff =
2140 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2141 rx_comp.correlator);
2142 /* do error checking */
2143 if (next->rx_comp.rc) {
2144 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2145 be16_to_cpu(next->rx_comp.rc));
2146 /* free the entry */
2147 next->rx_comp.first = 0;
2148 dev_kfree_skb_any(rx_buff->skb);
2149 remove_buff_from_pool(adapter, rx_buff);
2150 continue;
2151 } else if (!rx_buff->skb) {
2152 /* free the entry */
2153 next->rx_comp.first = 0;
2154 remove_buff_from_pool(adapter, rx_buff);
2155 continue;
2156 }
2157
2158 length = be32_to_cpu(next->rx_comp.len);
2159 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2160 flags = next->rx_comp.flags;
2161 skb = rx_buff->skb;
2162 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2163 length);
2164
2165 /* VLAN Header has been stripped by the system firmware and
2166 * needs to be inserted by the driver
2167 */
2168 if (adapter->rx_vlan_header_insertion &&
2169 (flags & IBMVNIC_VLAN_STRIPPED))
2170 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2171 ntohs(next->rx_comp.vlan_tci));
2172
2173 /* free the entry */
2174 next->rx_comp.first = 0;
2175 remove_buff_from_pool(adapter, rx_buff);
2176
2177 skb_put(skb, length);
2178 skb->protocol = eth_type_trans(skb, netdev);
2179 skb_record_rx_queue(skb, scrq_num);
2180
2181 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2182 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2183 skb->ip_summed = CHECKSUM_UNNECESSARY;
2184 }
2185
2186 length = skb->len;
2187 napi_gro_receive(napi, skb); /* send it up */
2188 netdev->stats.rx_packets++;
2189 netdev->stats.rx_bytes += length;
2190 adapter->rx_stats_buffers[scrq_num].packets++;
2191 adapter->rx_stats_buffers[scrq_num].bytes += length;
2192 frames_processed++;
2193 }
2194
2195 if (adapter->state != VNIC_CLOSING)
2196 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2197
2198 if (frames_processed < budget) {
2199 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2200 napi_complete_done(napi, frames_processed);
2201 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2202 napi_reschedule(napi)) {
2203 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2204 goto restart_poll;
2205 }
2206 }
2207 return frames_processed;
2208 }
2209
wait_for_reset(struct ibmvnic_adapter * adapter)2210 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2211 {
2212 int rc, ret;
2213
2214 adapter->fallback.mtu = adapter->req_mtu;
2215 adapter->fallback.rx_queues = adapter->req_rx_queues;
2216 adapter->fallback.tx_queues = adapter->req_tx_queues;
2217 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2218 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2219
2220 init_completion(&adapter->reset_done);
2221 adapter->wait_for_reset = true;
2222 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2223 if (rc)
2224 return rc;
2225 wait_for_completion(&adapter->reset_done);
2226
2227 ret = 0;
2228 if (adapter->reset_done_rc) {
2229 ret = -EIO;
2230 adapter->desired.mtu = adapter->fallback.mtu;
2231 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2232 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2233 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2234 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2235
2236 init_completion(&adapter->reset_done);
2237 adapter->wait_for_reset = true;
2238 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2239 if (rc)
2240 return ret;
2241 wait_for_completion(&adapter->reset_done);
2242 }
2243 adapter->wait_for_reset = false;
2244
2245 return ret;
2246 }
2247
ibmvnic_change_mtu(struct net_device * netdev,int new_mtu)2248 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2249 {
2250 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2251
2252 adapter->desired.mtu = new_mtu + ETH_HLEN;
2253
2254 return wait_for_reset(adapter);
2255 }
2256
ibmvnic_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)2257 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2258 struct net_device *dev,
2259 netdev_features_t features)
2260 {
2261 /* Some backing hardware adapters can not
2262 * handle packets with a MSS less than 224
2263 * or with only one segment.
2264 */
2265 if (skb_is_gso(skb)) {
2266 if (skb_shinfo(skb)->gso_size < 224 ||
2267 skb_shinfo(skb)->gso_segs == 1)
2268 features &= ~NETIF_F_GSO_MASK;
2269 }
2270
2271 return features;
2272 }
2273
2274 static const struct net_device_ops ibmvnic_netdev_ops = {
2275 .ndo_open = ibmvnic_open,
2276 .ndo_stop = ibmvnic_close,
2277 .ndo_start_xmit = ibmvnic_xmit,
2278 .ndo_set_rx_mode = ibmvnic_set_multi,
2279 .ndo_set_mac_address = ibmvnic_set_mac,
2280 .ndo_validate_addr = eth_validate_addr,
2281 .ndo_tx_timeout = ibmvnic_tx_timeout,
2282 .ndo_change_mtu = ibmvnic_change_mtu,
2283 .ndo_features_check = ibmvnic_features_check,
2284 };
2285
2286 /* ethtool functions */
2287
ibmvnic_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)2288 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2289 struct ethtool_link_ksettings *cmd)
2290 {
2291 u32 supported, advertising;
2292
2293 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2294 SUPPORTED_FIBRE);
2295 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2296 ADVERTISED_FIBRE);
2297 cmd->base.speed = SPEED_1000;
2298 cmd->base.duplex = DUPLEX_FULL;
2299 cmd->base.port = PORT_FIBRE;
2300 cmd->base.phy_address = 0;
2301 cmd->base.autoneg = AUTONEG_ENABLE;
2302
2303 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2304 supported);
2305 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2306 advertising);
2307
2308 return 0;
2309 }
2310
ibmvnic_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)2311 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2312 struct ethtool_drvinfo *info)
2313 {
2314 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2315
2316 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2317 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2318 strlcpy(info->fw_version, adapter->fw_version,
2319 sizeof(info->fw_version));
2320 }
2321
ibmvnic_get_msglevel(struct net_device * netdev)2322 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2323 {
2324 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2325
2326 return adapter->msg_enable;
2327 }
2328
ibmvnic_set_msglevel(struct net_device * netdev,u32 data)2329 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2330 {
2331 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2332
2333 adapter->msg_enable = data;
2334 }
2335
ibmvnic_get_link(struct net_device * netdev)2336 static u32 ibmvnic_get_link(struct net_device *netdev)
2337 {
2338 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2339
2340 /* Don't need to send a query because we request a logical link up at
2341 * init and then we wait for link state indications
2342 */
2343 return adapter->logical_link_state;
2344 }
2345
ibmvnic_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)2346 static void ibmvnic_get_ringparam(struct net_device *netdev,
2347 struct ethtool_ringparam *ring)
2348 {
2349 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2350
2351 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2352 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2353 ring->rx_mini_max_pending = 0;
2354 ring->rx_jumbo_max_pending = 0;
2355 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2356 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2357 ring->rx_mini_pending = 0;
2358 ring->rx_jumbo_pending = 0;
2359 }
2360
ibmvnic_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)2361 static int ibmvnic_set_ringparam(struct net_device *netdev,
2362 struct ethtool_ringparam *ring)
2363 {
2364 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2365
2366 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2367 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2368 netdev_err(netdev, "Invalid request.\n");
2369 netdev_err(netdev, "Max tx buffers = %llu\n",
2370 adapter->max_rx_add_entries_per_subcrq);
2371 netdev_err(netdev, "Max rx buffers = %llu\n",
2372 adapter->max_tx_entries_per_subcrq);
2373 return -EINVAL;
2374 }
2375
2376 adapter->desired.rx_entries = ring->rx_pending;
2377 adapter->desired.tx_entries = ring->tx_pending;
2378
2379 return wait_for_reset(adapter);
2380 }
2381
ibmvnic_get_channels(struct net_device * netdev,struct ethtool_channels * channels)2382 static void ibmvnic_get_channels(struct net_device *netdev,
2383 struct ethtool_channels *channels)
2384 {
2385 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2386
2387 channels->max_rx = adapter->max_rx_queues;
2388 channels->max_tx = adapter->max_tx_queues;
2389 channels->max_other = 0;
2390 channels->max_combined = 0;
2391 channels->rx_count = adapter->req_rx_queues;
2392 channels->tx_count = adapter->req_tx_queues;
2393 channels->other_count = 0;
2394 channels->combined_count = 0;
2395 }
2396
ibmvnic_set_channels(struct net_device * netdev,struct ethtool_channels * channels)2397 static int ibmvnic_set_channels(struct net_device *netdev,
2398 struct ethtool_channels *channels)
2399 {
2400 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2401
2402 adapter->desired.rx_queues = channels->rx_count;
2403 adapter->desired.tx_queues = channels->tx_count;
2404
2405 return wait_for_reset(adapter);
2406 }
2407
ibmvnic_get_strings(struct net_device * dev,u32 stringset,u8 * data)2408 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2409 {
2410 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2411 int i;
2412
2413 if (stringset != ETH_SS_STATS)
2414 return;
2415
2416 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2417 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2418
2419 for (i = 0; i < adapter->req_tx_queues; i++) {
2420 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2421 data += ETH_GSTRING_LEN;
2422
2423 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2424 data += ETH_GSTRING_LEN;
2425
2426 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2427 data += ETH_GSTRING_LEN;
2428 }
2429
2430 for (i = 0; i < adapter->req_rx_queues; i++) {
2431 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2432 data += ETH_GSTRING_LEN;
2433
2434 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2435 data += ETH_GSTRING_LEN;
2436
2437 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2438 data += ETH_GSTRING_LEN;
2439 }
2440 }
2441
ibmvnic_get_sset_count(struct net_device * dev,int sset)2442 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2443 {
2444 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2445
2446 switch (sset) {
2447 case ETH_SS_STATS:
2448 return ARRAY_SIZE(ibmvnic_stats) +
2449 adapter->req_tx_queues * NUM_TX_STATS +
2450 adapter->req_rx_queues * NUM_RX_STATS;
2451 default:
2452 return -EOPNOTSUPP;
2453 }
2454 }
2455
ibmvnic_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)2456 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2457 struct ethtool_stats *stats, u64 *data)
2458 {
2459 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2460 union ibmvnic_crq crq;
2461 int i, j;
2462 int rc;
2463
2464 memset(&crq, 0, sizeof(crq));
2465 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2466 crq.request_statistics.cmd = REQUEST_STATISTICS;
2467 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2468 crq.request_statistics.len =
2469 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2470
2471 /* Wait for data to be written */
2472 init_completion(&adapter->stats_done);
2473 rc = ibmvnic_send_crq(adapter, &crq);
2474 if (rc)
2475 return;
2476 wait_for_completion(&adapter->stats_done);
2477
2478 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2479 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2480 ibmvnic_stats[i].offset));
2481
2482 for (j = 0; j < adapter->req_tx_queues; j++) {
2483 data[i] = adapter->tx_stats_buffers[j].packets;
2484 i++;
2485 data[i] = adapter->tx_stats_buffers[j].bytes;
2486 i++;
2487 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2488 i++;
2489 }
2490
2491 for (j = 0; j < adapter->req_rx_queues; j++) {
2492 data[i] = adapter->rx_stats_buffers[j].packets;
2493 i++;
2494 data[i] = adapter->rx_stats_buffers[j].bytes;
2495 i++;
2496 data[i] = adapter->rx_stats_buffers[j].interrupts;
2497 i++;
2498 }
2499 }
2500
2501 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2502 .get_drvinfo = ibmvnic_get_drvinfo,
2503 .get_msglevel = ibmvnic_get_msglevel,
2504 .set_msglevel = ibmvnic_set_msglevel,
2505 .get_link = ibmvnic_get_link,
2506 .get_ringparam = ibmvnic_get_ringparam,
2507 .set_ringparam = ibmvnic_set_ringparam,
2508 .get_channels = ibmvnic_get_channels,
2509 .set_channels = ibmvnic_set_channels,
2510 .get_strings = ibmvnic_get_strings,
2511 .get_sset_count = ibmvnic_get_sset_count,
2512 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2513 .get_link_ksettings = ibmvnic_get_link_ksettings,
2514 };
2515
2516 /* Routines for managing CRQs/sCRQs */
2517
reset_one_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2518 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2519 struct ibmvnic_sub_crq_queue *scrq)
2520 {
2521 int rc;
2522
2523 if (scrq->irq) {
2524 free_irq(scrq->irq, scrq);
2525 irq_dispose_mapping(scrq->irq);
2526 scrq->irq = 0;
2527 }
2528
2529 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2530 atomic_set(&scrq->used, 0);
2531 scrq->cur = 0;
2532
2533 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2534 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2535 return rc;
2536 }
2537
reset_sub_crq_queues(struct ibmvnic_adapter * adapter)2538 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2539 {
2540 int i, rc;
2541
2542 for (i = 0; i < adapter->req_tx_queues; i++) {
2543 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2544 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2545 if (rc)
2546 return rc;
2547 }
2548
2549 for (i = 0; i < adapter->req_rx_queues; i++) {
2550 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2551 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2552 if (rc)
2553 return rc;
2554 }
2555
2556 return rc;
2557 }
2558
release_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq,bool do_h_free)2559 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2560 struct ibmvnic_sub_crq_queue *scrq,
2561 bool do_h_free)
2562 {
2563 struct device *dev = &adapter->vdev->dev;
2564 long rc;
2565
2566 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2567
2568 if (do_h_free) {
2569 /* Close the sub-crqs */
2570 do {
2571 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2572 adapter->vdev->unit_address,
2573 scrq->crq_num);
2574 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2575
2576 if (rc) {
2577 netdev_err(adapter->netdev,
2578 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2579 scrq->crq_num, rc);
2580 }
2581 }
2582
2583 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2584 DMA_BIDIRECTIONAL);
2585 free_pages((unsigned long)scrq->msgs, 2);
2586 kfree(scrq);
2587 }
2588
init_sub_crq_queue(struct ibmvnic_adapter * adapter)2589 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2590 *adapter)
2591 {
2592 struct device *dev = &adapter->vdev->dev;
2593 struct ibmvnic_sub_crq_queue *scrq;
2594 int rc;
2595
2596 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2597 if (!scrq)
2598 return NULL;
2599
2600 scrq->msgs =
2601 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2602 if (!scrq->msgs) {
2603 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2604 goto zero_page_failed;
2605 }
2606
2607 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2608 DMA_BIDIRECTIONAL);
2609 if (dma_mapping_error(dev, scrq->msg_token)) {
2610 dev_warn(dev, "Couldn't map crq queue messages page\n");
2611 goto map_failed;
2612 }
2613
2614 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2615 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2616
2617 if (rc == H_RESOURCE)
2618 rc = ibmvnic_reset_crq(adapter);
2619
2620 if (rc == H_CLOSED) {
2621 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2622 } else if (rc) {
2623 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2624 goto reg_failed;
2625 }
2626
2627 scrq->adapter = adapter;
2628 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2629 spin_lock_init(&scrq->lock);
2630
2631 netdev_dbg(adapter->netdev,
2632 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2633 scrq->crq_num, scrq->hw_irq, scrq->irq);
2634
2635 return scrq;
2636
2637 reg_failed:
2638 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2639 DMA_BIDIRECTIONAL);
2640 map_failed:
2641 free_pages((unsigned long)scrq->msgs, 2);
2642 zero_page_failed:
2643 kfree(scrq);
2644
2645 return NULL;
2646 }
2647
release_sub_crqs(struct ibmvnic_adapter * adapter,bool do_h_free)2648 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2649 {
2650 int i;
2651
2652 if (adapter->tx_scrq) {
2653 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2654 if (!adapter->tx_scrq[i])
2655 continue;
2656
2657 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2658 i);
2659 if (adapter->tx_scrq[i]->irq) {
2660 free_irq(adapter->tx_scrq[i]->irq,
2661 adapter->tx_scrq[i]);
2662 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2663 adapter->tx_scrq[i]->irq = 0;
2664 }
2665
2666 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2667 do_h_free);
2668 }
2669
2670 kfree(adapter->tx_scrq);
2671 adapter->tx_scrq = NULL;
2672 adapter->num_active_tx_scrqs = 0;
2673 }
2674
2675 if (adapter->rx_scrq) {
2676 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2677 if (!adapter->rx_scrq[i])
2678 continue;
2679
2680 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2681 i);
2682 if (adapter->rx_scrq[i]->irq) {
2683 free_irq(adapter->rx_scrq[i]->irq,
2684 adapter->rx_scrq[i]);
2685 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2686 adapter->rx_scrq[i]->irq = 0;
2687 }
2688
2689 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2690 do_h_free);
2691 }
2692
2693 kfree(adapter->rx_scrq);
2694 adapter->rx_scrq = NULL;
2695 adapter->num_active_rx_scrqs = 0;
2696 }
2697 }
2698
disable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2699 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2700 struct ibmvnic_sub_crq_queue *scrq)
2701 {
2702 struct device *dev = &adapter->vdev->dev;
2703 unsigned long rc;
2704
2705 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2706 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2707 if (rc)
2708 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2709 scrq->hw_irq, rc);
2710 return rc;
2711 }
2712
enable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2713 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2714 struct ibmvnic_sub_crq_queue *scrq)
2715 {
2716 struct device *dev = &adapter->vdev->dev;
2717 unsigned long rc;
2718
2719 if (scrq->hw_irq > 0x100000000ULL) {
2720 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2721 return 1;
2722 }
2723
2724 if (adapter->resetting &&
2725 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2726 u64 val = (0xff000000) | scrq->hw_irq;
2727
2728 rc = plpar_hcall_norets(H_EOI, val);
2729 if (rc)
2730 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2731 val, rc);
2732 }
2733
2734 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2735 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2736 if (rc)
2737 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2738 scrq->hw_irq, rc);
2739 return rc;
2740 }
2741
ibmvnic_complete_tx(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2742 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2743 struct ibmvnic_sub_crq_queue *scrq)
2744 {
2745 struct device *dev = &adapter->vdev->dev;
2746 struct ibmvnic_tx_pool *tx_pool;
2747 struct ibmvnic_tx_buff *txbuff;
2748 union sub_crq *next;
2749 int index;
2750 int i, j;
2751 u8 *first;
2752
2753 restart_loop:
2754 while (pending_scrq(adapter, scrq)) {
2755 unsigned int pool = scrq->pool_index;
2756 int num_entries = 0;
2757
2758 next = ibmvnic_next_scrq(adapter, scrq);
2759 for (i = 0; i < next->tx_comp.num_comps; i++) {
2760 if (next->tx_comp.rcs[i]) {
2761 dev_err(dev, "tx error %x\n",
2762 next->tx_comp.rcs[i]);
2763 continue;
2764 }
2765 index = be32_to_cpu(next->tx_comp.correlators[i]);
2766 if (index & IBMVNIC_TSO_POOL_MASK) {
2767 tx_pool = &adapter->tso_pool[pool];
2768 index &= ~IBMVNIC_TSO_POOL_MASK;
2769 } else {
2770 tx_pool = &adapter->tx_pool[pool];
2771 }
2772
2773 txbuff = &tx_pool->tx_buff[index];
2774
2775 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2776 if (!txbuff->data_dma[j])
2777 continue;
2778
2779 txbuff->data_dma[j] = 0;
2780 }
2781 /* if sub_crq was sent indirectly */
2782 first = &txbuff->indir_arr[0].generic.first;
2783 if (*first == IBMVNIC_CRQ_CMD) {
2784 dma_unmap_single(dev, txbuff->indir_dma,
2785 sizeof(txbuff->indir_arr),
2786 DMA_TO_DEVICE);
2787 *first = 0;
2788 }
2789
2790 if (txbuff->last_frag) {
2791 dev_kfree_skb_any(txbuff->skb);
2792 txbuff->skb = NULL;
2793 }
2794
2795 num_entries += txbuff->num_entries;
2796
2797 tx_pool->free_map[tx_pool->producer_index] = index;
2798 tx_pool->producer_index =
2799 (tx_pool->producer_index + 1) %
2800 tx_pool->num_buffers;
2801 }
2802 /* remove tx_comp scrq*/
2803 next->tx_comp.first = 0;
2804
2805 if (atomic_sub_return(num_entries, &scrq->used) <=
2806 (adapter->req_tx_entries_per_subcrq / 2) &&
2807 __netif_subqueue_stopped(adapter->netdev,
2808 scrq->pool_index)) {
2809 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2810 netdev_dbg(adapter->netdev, "Started queue %d\n",
2811 scrq->pool_index);
2812 }
2813 }
2814
2815 enable_scrq_irq(adapter, scrq);
2816
2817 if (pending_scrq(adapter, scrq)) {
2818 disable_scrq_irq(adapter, scrq);
2819 goto restart_loop;
2820 }
2821
2822 return 0;
2823 }
2824
ibmvnic_interrupt_tx(int irq,void * instance)2825 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2826 {
2827 struct ibmvnic_sub_crq_queue *scrq = instance;
2828 struct ibmvnic_adapter *adapter = scrq->adapter;
2829
2830 disable_scrq_irq(adapter, scrq);
2831 ibmvnic_complete_tx(adapter, scrq);
2832
2833 return IRQ_HANDLED;
2834 }
2835
ibmvnic_interrupt_rx(int irq,void * instance)2836 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2837 {
2838 struct ibmvnic_sub_crq_queue *scrq = instance;
2839 struct ibmvnic_adapter *adapter = scrq->adapter;
2840
2841 /* When booting a kdump kernel we can hit pending interrupts
2842 * prior to completing driver initialization.
2843 */
2844 if (unlikely(adapter->state != VNIC_OPEN))
2845 return IRQ_NONE;
2846
2847 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2848
2849 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2850 disable_scrq_irq(adapter, scrq);
2851 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2852 }
2853
2854 return IRQ_HANDLED;
2855 }
2856
init_sub_crq_irqs(struct ibmvnic_adapter * adapter)2857 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2858 {
2859 struct device *dev = &adapter->vdev->dev;
2860 struct ibmvnic_sub_crq_queue *scrq;
2861 int i = 0, j = 0;
2862 int rc = 0;
2863
2864 for (i = 0; i < adapter->req_tx_queues; i++) {
2865 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2866 i);
2867 scrq = adapter->tx_scrq[i];
2868 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2869
2870 if (!scrq->irq) {
2871 rc = -EINVAL;
2872 dev_err(dev, "Error mapping irq\n");
2873 goto req_tx_irq_failed;
2874 }
2875
2876 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2877 0, "ibmvnic_tx", scrq);
2878
2879 if (rc) {
2880 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2881 scrq->irq, rc);
2882 irq_dispose_mapping(scrq->irq);
2883 goto req_tx_irq_failed;
2884 }
2885 }
2886
2887 for (i = 0; i < adapter->req_rx_queues; i++) {
2888 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2889 i);
2890 scrq = adapter->rx_scrq[i];
2891 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2892 if (!scrq->irq) {
2893 rc = -EINVAL;
2894 dev_err(dev, "Error mapping irq\n");
2895 goto req_rx_irq_failed;
2896 }
2897 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2898 0, "ibmvnic_rx", scrq);
2899 if (rc) {
2900 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2901 scrq->irq, rc);
2902 irq_dispose_mapping(scrq->irq);
2903 goto req_rx_irq_failed;
2904 }
2905 }
2906 return rc;
2907
2908 req_rx_irq_failed:
2909 for (j = 0; j < i; j++) {
2910 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2911 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2912 }
2913 i = adapter->req_tx_queues;
2914 req_tx_irq_failed:
2915 for (j = 0; j < i; j++) {
2916 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2917 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2918 }
2919 release_sub_crqs(adapter, 1);
2920 return rc;
2921 }
2922
init_sub_crqs(struct ibmvnic_adapter * adapter)2923 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2924 {
2925 struct device *dev = &adapter->vdev->dev;
2926 struct ibmvnic_sub_crq_queue **allqueues;
2927 int registered_queues = 0;
2928 int total_queues;
2929 int more = 0;
2930 int i;
2931
2932 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2933
2934 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2935 if (!allqueues)
2936 return -1;
2937
2938 for (i = 0; i < total_queues; i++) {
2939 allqueues[i] = init_sub_crq_queue(adapter);
2940 if (!allqueues[i]) {
2941 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2942 break;
2943 }
2944 registered_queues++;
2945 }
2946
2947 /* Make sure we were able to register the minimum number of queues */
2948 if (registered_queues <
2949 adapter->min_tx_queues + adapter->min_rx_queues) {
2950 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2951 goto tx_failed;
2952 }
2953
2954 /* Distribute the failed allocated queues*/
2955 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2956 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2957 switch (i % 3) {
2958 case 0:
2959 if (adapter->req_rx_queues > adapter->min_rx_queues)
2960 adapter->req_rx_queues--;
2961 else
2962 more++;
2963 break;
2964 case 1:
2965 if (adapter->req_tx_queues > adapter->min_tx_queues)
2966 adapter->req_tx_queues--;
2967 else
2968 more++;
2969 break;
2970 }
2971 }
2972
2973 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2974 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2975 if (!adapter->tx_scrq)
2976 goto tx_failed;
2977
2978 for (i = 0; i < adapter->req_tx_queues; i++) {
2979 adapter->tx_scrq[i] = allqueues[i];
2980 adapter->tx_scrq[i]->pool_index = i;
2981 adapter->num_active_tx_scrqs++;
2982 }
2983
2984 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2985 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2986 if (!adapter->rx_scrq)
2987 goto rx_failed;
2988
2989 for (i = 0; i < adapter->req_rx_queues; i++) {
2990 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2991 adapter->rx_scrq[i]->scrq_num = i;
2992 adapter->num_active_rx_scrqs++;
2993 }
2994
2995 kfree(allqueues);
2996 return 0;
2997
2998 rx_failed:
2999 kfree(adapter->tx_scrq);
3000 adapter->tx_scrq = NULL;
3001 tx_failed:
3002 for (i = 0; i < registered_queues; i++)
3003 release_sub_crq_queue(adapter, allqueues[i], 1);
3004 kfree(allqueues);
3005 return -1;
3006 }
3007
ibmvnic_send_req_caps(struct ibmvnic_adapter * adapter,int retry)3008 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3009 {
3010 struct device *dev = &adapter->vdev->dev;
3011 union ibmvnic_crq crq;
3012 int max_entries;
3013
3014 if (!retry) {
3015 /* Sub-CRQ entries are 32 byte long */
3016 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3017
3018 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3019 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3020 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3021 return;
3022 }
3023
3024 if (adapter->desired.mtu)
3025 adapter->req_mtu = adapter->desired.mtu;
3026 else
3027 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3028
3029 if (!adapter->desired.tx_entries)
3030 adapter->desired.tx_entries =
3031 adapter->max_tx_entries_per_subcrq;
3032 if (!adapter->desired.rx_entries)
3033 adapter->desired.rx_entries =
3034 adapter->max_rx_add_entries_per_subcrq;
3035
3036 max_entries = IBMVNIC_MAX_LTB_SIZE /
3037 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3038
3039 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3040 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3041 adapter->desired.tx_entries = max_entries;
3042 }
3043
3044 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3045 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3046 adapter->desired.rx_entries = max_entries;
3047 }
3048
3049 if (adapter->desired.tx_entries)
3050 adapter->req_tx_entries_per_subcrq =
3051 adapter->desired.tx_entries;
3052 else
3053 adapter->req_tx_entries_per_subcrq =
3054 adapter->max_tx_entries_per_subcrq;
3055
3056 if (adapter->desired.rx_entries)
3057 adapter->req_rx_add_entries_per_subcrq =
3058 adapter->desired.rx_entries;
3059 else
3060 adapter->req_rx_add_entries_per_subcrq =
3061 adapter->max_rx_add_entries_per_subcrq;
3062
3063 if (adapter->desired.tx_queues)
3064 adapter->req_tx_queues =
3065 adapter->desired.tx_queues;
3066 else
3067 adapter->req_tx_queues =
3068 adapter->opt_tx_comp_sub_queues;
3069
3070 if (adapter->desired.rx_queues)
3071 adapter->req_rx_queues =
3072 adapter->desired.rx_queues;
3073 else
3074 adapter->req_rx_queues =
3075 adapter->opt_rx_comp_queues;
3076
3077 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3078 }
3079
3080 memset(&crq, 0, sizeof(crq));
3081 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3082 crq.request_capability.cmd = REQUEST_CAPABILITY;
3083
3084 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3085 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3086 atomic_inc(&adapter->running_cap_crqs);
3087 ibmvnic_send_crq(adapter, &crq);
3088
3089 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3090 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3091 atomic_inc(&adapter->running_cap_crqs);
3092 ibmvnic_send_crq(adapter, &crq);
3093
3094 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3095 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3096 atomic_inc(&adapter->running_cap_crqs);
3097 ibmvnic_send_crq(adapter, &crq);
3098
3099 crq.request_capability.capability =
3100 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3101 crq.request_capability.number =
3102 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3103 atomic_inc(&adapter->running_cap_crqs);
3104 ibmvnic_send_crq(adapter, &crq);
3105
3106 crq.request_capability.capability =
3107 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3108 crq.request_capability.number =
3109 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3110 atomic_inc(&adapter->running_cap_crqs);
3111 ibmvnic_send_crq(adapter, &crq);
3112
3113 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3114 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3115 atomic_inc(&adapter->running_cap_crqs);
3116 ibmvnic_send_crq(adapter, &crq);
3117
3118 if (adapter->netdev->flags & IFF_PROMISC) {
3119 if (adapter->promisc_supported) {
3120 crq.request_capability.capability =
3121 cpu_to_be16(PROMISC_REQUESTED);
3122 crq.request_capability.number = cpu_to_be64(1);
3123 atomic_inc(&adapter->running_cap_crqs);
3124 ibmvnic_send_crq(adapter, &crq);
3125 }
3126 } else {
3127 crq.request_capability.capability =
3128 cpu_to_be16(PROMISC_REQUESTED);
3129 crq.request_capability.number = cpu_to_be64(0);
3130 atomic_inc(&adapter->running_cap_crqs);
3131 ibmvnic_send_crq(adapter, &crq);
3132 }
3133 }
3134
pending_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3135 static int pending_scrq(struct ibmvnic_adapter *adapter,
3136 struct ibmvnic_sub_crq_queue *scrq)
3137 {
3138 union sub_crq *entry = &scrq->msgs[scrq->cur];
3139
3140 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3141 return 1;
3142 else
3143 return 0;
3144 }
3145
ibmvnic_next_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3146 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3147 struct ibmvnic_sub_crq_queue *scrq)
3148 {
3149 union sub_crq *entry;
3150 unsigned long flags;
3151
3152 spin_lock_irqsave(&scrq->lock, flags);
3153 entry = &scrq->msgs[scrq->cur];
3154 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3155 if (++scrq->cur == scrq->size)
3156 scrq->cur = 0;
3157 } else {
3158 entry = NULL;
3159 }
3160 spin_unlock_irqrestore(&scrq->lock, flags);
3161
3162 return entry;
3163 }
3164
ibmvnic_next_crq(struct ibmvnic_adapter * adapter)3165 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3166 {
3167 struct ibmvnic_crq_queue *queue = &adapter->crq;
3168 union ibmvnic_crq *crq;
3169
3170 crq = &queue->msgs[queue->cur];
3171 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3172 if (++queue->cur == queue->size)
3173 queue->cur = 0;
3174 } else {
3175 crq = NULL;
3176 }
3177
3178 return crq;
3179 }
3180
print_subcrq_error(struct device * dev,int rc,const char * func)3181 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3182 {
3183 switch (rc) {
3184 case H_PARAMETER:
3185 dev_warn_ratelimited(dev,
3186 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3187 func, rc);
3188 break;
3189 case H_CLOSED:
3190 dev_warn_ratelimited(dev,
3191 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3192 func, rc);
3193 break;
3194 default:
3195 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3196 break;
3197 }
3198 }
3199
send_subcrq(struct ibmvnic_adapter * adapter,u64 remote_handle,union sub_crq * sub_crq)3200 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3201 union sub_crq *sub_crq)
3202 {
3203 unsigned int ua = adapter->vdev->unit_address;
3204 struct device *dev = &adapter->vdev->dev;
3205 u64 *u64_crq = (u64 *)sub_crq;
3206 int rc;
3207
3208 netdev_dbg(adapter->netdev,
3209 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3210 (unsigned long int)cpu_to_be64(remote_handle),
3211 (unsigned long int)cpu_to_be64(u64_crq[0]),
3212 (unsigned long int)cpu_to_be64(u64_crq[1]),
3213 (unsigned long int)cpu_to_be64(u64_crq[2]),
3214 (unsigned long int)cpu_to_be64(u64_crq[3]));
3215
3216 /* Make sure the hypervisor sees the complete request */
3217 mb();
3218
3219 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3220 cpu_to_be64(remote_handle),
3221 cpu_to_be64(u64_crq[0]),
3222 cpu_to_be64(u64_crq[1]),
3223 cpu_to_be64(u64_crq[2]),
3224 cpu_to_be64(u64_crq[3]));
3225
3226 if (rc)
3227 print_subcrq_error(dev, rc, __func__);
3228
3229 return rc;
3230 }
3231
send_subcrq_indirect(struct ibmvnic_adapter * adapter,u64 remote_handle,u64 ioba,u64 num_entries)3232 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3233 u64 remote_handle, u64 ioba, u64 num_entries)
3234 {
3235 unsigned int ua = adapter->vdev->unit_address;
3236 struct device *dev = &adapter->vdev->dev;
3237 int rc;
3238
3239 /* Make sure the hypervisor sees the complete request */
3240 mb();
3241 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3242 cpu_to_be64(remote_handle),
3243 ioba, num_entries);
3244
3245 if (rc)
3246 print_subcrq_error(dev, rc, __func__);
3247
3248 return rc;
3249 }
3250
ibmvnic_send_crq(struct ibmvnic_adapter * adapter,union ibmvnic_crq * crq)3251 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3252 union ibmvnic_crq *crq)
3253 {
3254 unsigned int ua = adapter->vdev->unit_address;
3255 struct device *dev = &adapter->vdev->dev;
3256 u64 *u64_crq = (u64 *)crq;
3257 int rc;
3258
3259 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3260 (unsigned long int)cpu_to_be64(u64_crq[0]),
3261 (unsigned long int)cpu_to_be64(u64_crq[1]));
3262
3263 if (!adapter->crq.active &&
3264 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3265 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3266 return -EINVAL;
3267 }
3268
3269 /* Make sure the hypervisor sees the complete request */
3270 mb();
3271
3272 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3273 cpu_to_be64(u64_crq[0]),
3274 cpu_to_be64(u64_crq[1]));
3275
3276 if (rc) {
3277 if (rc == H_CLOSED) {
3278 dev_warn(dev, "CRQ Queue closed\n");
3279 if (adapter->resetting)
3280 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3281 }
3282
3283 dev_warn(dev, "Send error (rc=%d)\n", rc);
3284 }
3285
3286 return rc;
3287 }
3288
ibmvnic_send_crq_init(struct ibmvnic_adapter * adapter)3289 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3290 {
3291 union ibmvnic_crq crq;
3292
3293 memset(&crq, 0, sizeof(crq));
3294 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3295 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3296 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3297
3298 return ibmvnic_send_crq(adapter, &crq);
3299 }
3300
send_version_xchg(struct ibmvnic_adapter * adapter)3301 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3302 {
3303 union ibmvnic_crq crq;
3304
3305 memset(&crq, 0, sizeof(crq));
3306 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3307 crq.version_exchange.cmd = VERSION_EXCHANGE;
3308 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3309
3310 return ibmvnic_send_crq(adapter, &crq);
3311 }
3312
3313 struct vnic_login_client_data {
3314 u8 type;
3315 __be16 len;
3316 char name[];
3317 } __packed;
3318
vnic_client_data_len(struct ibmvnic_adapter * adapter)3319 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3320 {
3321 int len;
3322
3323 /* Calculate the amount of buffer space needed for the
3324 * vnic client data in the login buffer. There are four entries,
3325 * OS name, LPAR name, device name, and a null last entry.
3326 */
3327 len = 4 * sizeof(struct vnic_login_client_data);
3328 len += 6; /* "Linux" plus NULL */
3329 len += strlen(utsname()->nodename) + 1;
3330 len += strlen(adapter->netdev->name) + 1;
3331
3332 return len;
3333 }
3334
vnic_add_client_data(struct ibmvnic_adapter * adapter,struct vnic_login_client_data * vlcd)3335 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3336 struct vnic_login_client_data *vlcd)
3337 {
3338 const char *os_name = "Linux";
3339 int len;
3340
3341 /* Type 1 - LPAR OS */
3342 vlcd->type = 1;
3343 len = strlen(os_name) + 1;
3344 vlcd->len = cpu_to_be16(len);
3345 strncpy(vlcd->name, os_name, len);
3346 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3347
3348 /* Type 2 - LPAR name */
3349 vlcd->type = 2;
3350 len = strlen(utsname()->nodename) + 1;
3351 vlcd->len = cpu_to_be16(len);
3352 strncpy(vlcd->name, utsname()->nodename, len);
3353 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3354
3355 /* Type 3 - device name */
3356 vlcd->type = 3;
3357 len = strlen(adapter->netdev->name) + 1;
3358 vlcd->len = cpu_to_be16(len);
3359 strncpy(vlcd->name, adapter->netdev->name, len);
3360 }
3361
send_login(struct ibmvnic_adapter * adapter)3362 static int send_login(struct ibmvnic_adapter *adapter)
3363 {
3364 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3365 struct ibmvnic_login_buffer *login_buffer;
3366 struct device *dev = &adapter->vdev->dev;
3367 dma_addr_t rsp_buffer_token;
3368 dma_addr_t buffer_token;
3369 size_t rsp_buffer_size;
3370 union ibmvnic_crq crq;
3371 size_t buffer_size;
3372 __be64 *tx_list_p;
3373 __be64 *rx_list_p;
3374 int client_data_len;
3375 struct vnic_login_client_data *vlcd;
3376 int i;
3377
3378 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3379 netdev_err(adapter->netdev,
3380 "RX or TX queues are not allocated, device login failed\n");
3381 return -1;
3382 }
3383
3384 release_login_rsp_buffer(adapter);
3385 client_data_len = vnic_client_data_len(adapter);
3386
3387 buffer_size =
3388 sizeof(struct ibmvnic_login_buffer) +
3389 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3390 client_data_len;
3391
3392 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3393 if (!login_buffer)
3394 goto buf_alloc_failed;
3395
3396 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3397 DMA_TO_DEVICE);
3398 if (dma_mapping_error(dev, buffer_token)) {
3399 dev_err(dev, "Couldn't map login buffer\n");
3400 goto buf_map_failed;
3401 }
3402
3403 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3404 sizeof(u64) * adapter->req_tx_queues +
3405 sizeof(u64) * adapter->req_rx_queues +
3406 sizeof(u64) * adapter->req_rx_queues +
3407 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3408
3409 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3410 if (!login_rsp_buffer)
3411 goto buf_rsp_alloc_failed;
3412
3413 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3414 rsp_buffer_size, DMA_FROM_DEVICE);
3415 if (dma_mapping_error(dev, rsp_buffer_token)) {
3416 dev_err(dev, "Couldn't map login rsp buffer\n");
3417 goto buf_rsp_map_failed;
3418 }
3419
3420 adapter->login_buf = login_buffer;
3421 adapter->login_buf_token = buffer_token;
3422 adapter->login_buf_sz = buffer_size;
3423 adapter->login_rsp_buf = login_rsp_buffer;
3424 adapter->login_rsp_buf_token = rsp_buffer_token;
3425 adapter->login_rsp_buf_sz = rsp_buffer_size;
3426
3427 login_buffer->len = cpu_to_be32(buffer_size);
3428 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3429 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3430 login_buffer->off_txcomp_subcrqs =
3431 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3432 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3433 login_buffer->off_rxcomp_subcrqs =
3434 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3435 sizeof(u64) * adapter->req_tx_queues);
3436 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3437 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3438
3439 tx_list_p = (__be64 *)((char *)login_buffer +
3440 sizeof(struct ibmvnic_login_buffer));
3441 rx_list_p = (__be64 *)((char *)login_buffer +
3442 sizeof(struct ibmvnic_login_buffer) +
3443 sizeof(u64) * adapter->req_tx_queues);
3444
3445 for (i = 0; i < adapter->req_tx_queues; i++) {
3446 if (adapter->tx_scrq[i]) {
3447 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3448 crq_num);
3449 }
3450 }
3451
3452 for (i = 0; i < adapter->req_rx_queues; i++) {
3453 if (adapter->rx_scrq[i]) {
3454 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3455 crq_num);
3456 }
3457 }
3458
3459 /* Insert vNIC login client data */
3460 vlcd = (struct vnic_login_client_data *)
3461 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3462 login_buffer->client_data_offset =
3463 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3464 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3465
3466 vnic_add_client_data(adapter, vlcd);
3467
3468 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3469 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3470 netdev_dbg(adapter->netdev, "%016lx\n",
3471 ((unsigned long int *)(adapter->login_buf))[i]);
3472 }
3473
3474 memset(&crq, 0, sizeof(crq));
3475 crq.login.first = IBMVNIC_CRQ_CMD;
3476 crq.login.cmd = LOGIN;
3477 crq.login.ioba = cpu_to_be32(buffer_token);
3478 crq.login.len = cpu_to_be32(buffer_size);
3479 ibmvnic_send_crq(adapter, &crq);
3480
3481 return 0;
3482
3483 buf_rsp_map_failed:
3484 kfree(login_rsp_buffer);
3485 buf_rsp_alloc_failed:
3486 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3487 buf_map_failed:
3488 kfree(login_buffer);
3489 buf_alloc_failed:
3490 return -1;
3491 }
3492
send_request_map(struct ibmvnic_adapter * adapter,dma_addr_t addr,u32 len,u8 map_id)3493 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3494 u32 len, u8 map_id)
3495 {
3496 union ibmvnic_crq crq;
3497
3498 memset(&crq, 0, sizeof(crq));
3499 crq.request_map.first = IBMVNIC_CRQ_CMD;
3500 crq.request_map.cmd = REQUEST_MAP;
3501 crq.request_map.map_id = map_id;
3502 crq.request_map.ioba = cpu_to_be32(addr);
3503 crq.request_map.len = cpu_to_be32(len);
3504 return ibmvnic_send_crq(adapter, &crq);
3505 }
3506
send_request_unmap(struct ibmvnic_adapter * adapter,u8 map_id)3507 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3508 {
3509 union ibmvnic_crq crq;
3510
3511 memset(&crq, 0, sizeof(crq));
3512 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3513 crq.request_unmap.cmd = REQUEST_UNMAP;
3514 crq.request_unmap.map_id = map_id;
3515 return ibmvnic_send_crq(adapter, &crq);
3516 }
3517
send_map_query(struct ibmvnic_adapter * adapter)3518 static void send_map_query(struct ibmvnic_adapter *adapter)
3519 {
3520 union ibmvnic_crq crq;
3521
3522 memset(&crq, 0, sizeof(crq));
3523 crq.query_map.first = IBMVNIC_CRQ_CMD;
3524 crq.query_map.cmd = QUERY_MAP;
3525 ibmvnic_send_crq(adapter, &crq);
3526 }
3527
3528 /* Send a series of CRQs requesting various capabilities of the VNIC server */
send_cap_queries(struct ibmvnic_adapter * adapter)3529 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3530 {
3531 union ibmvnic_crq crq;
3532
3533 atomic_set(&adapter->running_cap_crqs, 0);
3534 memset(&crq, 0, sizeof(crq));
3535 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3536 crq.query_capability.cmd = QUERY_CAPABILITY;
3537
3538 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3539 atomic_inc(&adapter->running_cap_crqs);
3540 ibmvnic_send_crq(adapter, &crq);
3541
3542 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3543 atomic_inc(&adapter->running_cap_crqs);
3544 ibmvnic_send_crq(adapter, &crq);
3545
3546 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3547 atomic_inc(&adapter->running_cap_crqs);
3548 ibmvnic_send_crq(adapter, &crq);
3549
3550 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3551 atomic_inc(&adapter->running_cap_crqs);
3552 ibmvnic_send_crq(adapter, &crq);
3553
3554 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3555 atomic_inc(&adapter->running_cap_crqs);
3556 ibmvnic_send_crq(adapter, &crq);
3557
3558 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3559 atomic_inc(&adapter->running_cap_crqs);
3560 ibmvnic_send_crq(adapter, &crq);
3561
3562 crq.query_capability.capability =
3563 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3564 atomic_inc(&adapter->running_cap_crqs);
3565 ibmvnic_send_crq(adapter, &crq);
3566
3567 crq.query_capability.capability =
3568 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3569 atomic_inc(&adapter->running_cap_crqs);
3570 ibmvnic_send_crq(adapter, &crq);
3571
3572 crq.query_capability.capability =
3573 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3574 atomic_inc(&adapter->running_cap_crqs);
3575 ibmvnic_send_crq(adapter, &crq);
3576
3577 crq.query_capability.capability =
3578 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3579 atomic_inc(&adapter->running_cap_crqs);
3580 ibmvnic_send_crq(adapter, &crq);
3581
3582 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3583 atomic_inc(&adapter->running_cap_crqs);
3584 ibmvnic_send_crq(adapter, &crq);
3585
3586 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3587 atomic_inc(&adapter->running_cap_crqs);
3588 ibmvnic_send_crq(adapter, &crq);
3589
3590 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3591 atomic_inc(&adapter->running_cap_crqs);
3592 ibmvnic_send_crq(adapter, &crq);
3593
3594 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3595 atomic_inc(&adapter->running_cap_crqs);
3596 ibmvnic_send_crq(adapter, &crq);
3597
3598 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3599 atomic_inc(&adapter->running_cap_crqs);
3600 ibmvnic_send_crq(adapter, &crq);
3601
3602 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3603 atomic_inc(&adapter->running_cap_crqs);
3604 ibmvnic_send_crq(adapter, &crq);
3605
3606 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3607 atomic_inc(&adapter->running_cap_crqs);
3608 ibmvnic_send_crq(adapter, &crq);
3609
3610 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3611 atomic_inc(&adapter->running_cap_crqs);
3612 ibmvnic_send_crq(adapter, &crq);
3613
3614 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3615 atomic_inc(&adapter->running_cap_crqs);
3616 ibmvnic_send_crq(adapter, &crq);
3617
3618 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3619 atomic_inc(&adapter->running_cap_crqs);
3620 ibmvnic_send_crq(adapter, &crq);
3621
3622 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3623 atomic_inc(&adapter->running_cap_crqs);
3624 ibmvnic_send_crq(adapter, &crq);
3625
3626 crq.query_capability.capability =
3627 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3628 atomic_inc(&adapter->running_cap_crqs);
3629 ibmvnic_send_crq(adapter, &crq);
3630
3631 crq.query_capability.capability =
3632 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3633 atomic_inc(&adapter->running_cap_crqs);
3634 ibmvnic_send_crq(adapter, &crq);
3635
3636 crq.query_capability.capability =
3637 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3638 atomic_inc(&adapter->running_cap_crqs);
3639 ibmvnic_send_crq(adapter, &crq);
3640
3641 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3642 atomic_inc(&adapter->running_cap_crqs);
3643 ibmvnic_send_crq(adapter, &crq);
3644 }
3645
handle_vpd_size_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3646 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3647 struct ibmvnic_adapter *adapter)
3648 {
3649 struct device *dev = &adapter->vdev->dev;
3650
3651 if (crq->get_vpd_size_rsp.rc.code) {
3652 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3653 crq->get_vpd_size_rsp.rc.code);
3654 complete(&adapter->fw_done);
3655 return;
3656 }
3657
3658 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3659 complete(&adapter->fw_done);
3660 }
3661
handle_vpd_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3662 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3663 struct ibmvnic_adapter *adapter)
3664 {
3665 struct device *dev = &adapter->vdev->dev;
3666 unsigned char *substr = NULL;
3667 u8 fw_level_len = 0;
3668
3669 memset(adapter->fw_version, 0, 32);
3670
3671 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3672 DMA_FROM_DEVICE);
3673
3674 if (crq->get_vpd_rsp.rc.code) {
3675 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3676 crq->get_vpd_rsp.rc.code);
3677 goto complete;
3678 }
3679
3680 /* get the position of the firmware version info
3681 * located after the ASCII 'RM' substring in the buffer
3682 */
3683 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3684 if (!substr) {
3685 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3686 goto complete;
3687 }
3688
3689 /* get length of firmware level ASCII substring */
3690 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3691 fw_level_len = *(substr + 2);
3692 } else {
3693 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3694 goto complete;
3695 }
3696
3697 /* copy firmware version string from vpd into adapter */
3698 if ((substr + 3 + fw_level_len) <
3699 (adapter->vpd->buff + adapter->vpd->len)) {
3700 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3701 } else {
3702 dev_info(dev, "FW substr extrapolated VPD buff\n");
3703 }
3704
3705 complete:
3706 if (adapter->fw_version[0] == '\0')
3707 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3708 complete(&adapter->fw_done);
3709 }
3710
handle_query_ip_offload_rsp(struct ibmvnic_adapter * adapter)3711 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3712 {
3713 struct device *dev = &adapter->vdev->dev;
3714 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3715 union ibmvnic_crq crq;
3716 int i;
3717
3718 dma_unmap_single(dev, adapter->ip_offload_tok,
3719 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3720
3721 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3722 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3723 netdev_dbg(adapter->netdev, "%016lx\n",
3724 ((unsigned long int *)(buf))[i]);
3725
3726 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3727 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3728 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3729 buf->tcp_ipv4_chksum);
3730 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3731 buf->tcp_ipv6_chksum);
3732 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3733 buf->udp_ipv4_chksum);
3734 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3735 buf->udp_ipv6_chksum);
3736 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3737 buf->large_tx_ipv4);
3738 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3739 buf->large_tx_ipv6);
3740 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3741 buf->large_rx_ipv4);
3742 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3743 buf->large_rx_ipv6);
3744 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3745 buf->max_ipv4_header_size);
3746 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3747 buf->max_ipv6_header_size);
3748 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3749 buf->max_tcp_header_size);
3750 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3751 buf->max_udp_header_size);
3752 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3753 buf->max_large_tx_size);
3754 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3755 buf->max_large_rx_size);
3756 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3757 buf->ipv6_extension_header);
3758 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3759 buf->tcp_pseudosum_req);
3760 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3761 buf->num_ipv6_ext_headers);
3762 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3763 buf->off_ipv6_ext_headers);
3764
3765 adapter->ip_offload_ctrl_tok =
3766 dma_map_single(dev, &adapter->ip_offload_ctrl,
3767 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3768
3769 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3770 dev_err(dev, "Couldn't map ip offload control buffer\n");
3771 return;
3772 }
3773
3774 adapter->ip_offload_ctrl.len =
3775 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3776 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3777 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3778 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3779 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3780 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3781 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3782 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3783 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3784 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3785
3786 /* large_rx disabled for now, additional features needed */
3787 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3788 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3789
3790 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3791
3792 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3793 adapter->netdev->features |= NETIF_F_IP_CSUM;
3794
3795 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3796 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3797
3798 if ((adapter->netdev->features &
3799 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3800 adapter->netdev->features |= NETIF_F_RXCSUM;
3801
3802 if (buf->large_tx_ipv4)
3803 adapter->netdev->features |= NETIF_F_TSO;
3804 if (buf->large_tx_ipv6)
3805 adapter->netdev->features |= NETIF_F_TSO6;
3806
3807 adapter->netdev->hw_features |= adapter->netdev->features;
3808
3809 memset(&crq, 0, sizeof(crq));
3810 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3811 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3812 crq.control_ip_offload.len =
3813 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3814 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3815 ibmvnic_send_crq(adapter, &crq);
3816 }
3817
ibmvnic_fw_err_cause(u16 cause)3818 static const char *ibmvnic_fw_err_cause(u16 cause)
3819 {
3820 switch (cause) {
3821 case ADAPTER_PROBLEM:
3822 return "adapter problem";
3823 case BUS_PROBLEM:
3824 return "bus problem";
3825 case FW_PROBLEM:
3826 return "firmware problem";
3827 case DD_PROBLEM:
3828 return "device driver problem";
3829 case EEH_RECOVERY:
3830 return "EEH recovery";
3831 case FW_UPDATED:
3832 return "firmware updated";
3833 case LOW_MEMORY:
3834 return "low Memory";
3835 default:
3836 return "unknown";
3837 }
3838 }
3839
handle_error_indication(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3840 static void handle_error_indication(union ibmvnic_crq *crq,
3841 struct ibmvnic_adapter *adapter)
3842 {
3843 struct device *dev = &adapter->vdev->dev;
3844 u16 cause;
3845
3846 cause = be16_to_cpu(crq->error_indication.error_cause);
3847
3848 dev_warn_ratelimited(dev,
3849 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3850 crq->error_indication.flags
3851 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3852 ibmvnic_fw_err_cause(cause));
3853
3854 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3855 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3856 else
3857 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3858 }
3859
handle_change_mac_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3860 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3861 struct ibmvnic_adapter *adapter)
3862 {
3863 struct net_device *netdev = adapter->netdev;
3864 struct device *dev = &adapter->vdev->dev;
3865 long rc;
3866
3867 rc = crq->change_mac_addr_rsp.rc.code;
3868 if (rc) {
3869 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3870 goto out;
3871 }
3872 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3873 ETH_ALEN);
3874 out:
3875 complete(&adapter->fw_done);
3876 return rc;
3877 }
3878
handle_request_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3879 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3880 struct ibmvnic_adapter *adapter)
3881 {
3882 struct device *dev = &adapter->vdev->dev;
3883 u64 *req_value;
3884 char *name;
3885
3886 atomic_dec(&adapter->running_cap_crqs);
3887 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3888 case REQ_TX_QUEUES:
3889 req_value = &adapter->req_tx_queues;
3890 name = "tx";
3891 break;
3892 case REQ_RX_QUEUES:
3893 req_value = &adapter->req_rx_queues;
3894 name = "rx";
3895 break;
3896 case REQ_RX_ADD_QUEUES:
3897 req_value = &adapter->req_rx_add_queues;
3898 name = "rx_add";
3899 break;
3900 case REQ_TX_ENTRIES_PER_SUBCRQ:
3901 req_value = &adapter->req_tx_entries_per_subcrq;
3902 name = "tx_entries_per_subcrq";
3903 break;
3904 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3905 req_value = &adapter->req_rx_add_entries_per_subcrq;
3906 name = "rx_add_entries_per_subcrq";
3907 break;
3908 case REQ_MTU:
3909 req_value = &adapter->req_mtu;
3910 name = "mtu";
3911 break;
3912 case PROMISC_REQUESTED:
3913 req_value = &adapter->promisc;
3914 name = "promisc";
3915 break;
3916 default:
3917 dev_err(dev, "Got invalid cap request rsp %d\n",
3918 crq->request_capability.capability);
3919 return;
3920 }
3921
3922 switch (crq->request_capability_rsp.rc.code) {
3923 case SUCCESS:
3924 break;
3925 case PARTIALSUCCESS:
3926 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3927 *req_value,
3928 (long int)be64_to_cpu(crq->request_capability_rsp.
3929 number), name);
3930
3931 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3932 REQ_MTU) {
3933 pr_err("mtu of %llu is not supported. Reverting.\n",
3934 *req_value);
3935 *req_value = adapter->fallback.mtu;
3936 } else {
3937 *req_value =
3938 be64_to_cpu(crq->request_capability_rsp.number);
3939 }
3940
3941 ibmvnic_send_req_caps(adapter, 1);
3942 return;
3943 default:
3944 dev_err(dev, "Error %d in request cap rsp\n",
3945 crq->request_capability_rsp.rc.code);
3946 return;
3947 }
3948
3949 /* Done receiving requested capabilities, query IP offload support */
3950 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3951 union ibmvnic_crq newcrq;
3952 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3953 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3954 &adapter->ip_offload_buf;
3955
3956 adapter->wait_capability = false;
3957 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3958 buf_sz,
3959 DMA_FROM_DEVICE);
3960
3961 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3962 if (!firmware_has_feature(FW_FEATURE_CMO))
3963 dev_err(dev, "Couldn't map offload buffer\n");
3964 return;
3965 }
3966
3967 memset(&newcrq, 0, sizeof(newcrq));
3968 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3969 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3970 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3971 newcrq.query_ip_offload.ioba =
3972 cpu_to_be32(adapter->ip_offload_tok);
3973
3974 ibmvnic_send_crq(adapter, &newcrq);
3975 }
3976 }
3977
handle_login_rsp(union ibmvnic_crq * login_rsp_crq,struct ibmvnic_adapter * adapter)3978 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3979 struct ibmvnic_adapter *adapter)
3980 {
3981 struct device *dev = &adapter->vdev->dev;
3982 struct net_device *netdev = adapter->netdev;
3983 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3984 struct ibmvnic_login_buffer *login = adapter->login_buf;
3985 int i;
3986
3987 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3988 DMA_TO_DEVICE);
3989 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3990 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
3991
3992 /* If the number of queues requested can't be allocated by the
3993 * server, the login response will return with code 1. We will need
3994 * to resend the login buffer with fewer queues requested.
3995 */
3996 if (login_rsp_crq->generic.rc.code) {
3997 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
3998 complete(&adapter->init_done);
3999 return 0;
4000 }
4001
4002 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4003
4004 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4005 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4006 netdev_dbg(adapter->netdev, "%016lx\n",
4007 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4008 }
4009
4010 /* Sanity checks */
4011 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4012 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4013 adapter->req_rx_add_queues !=
4014 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4015 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4016 ibmvnic_remove(adapter->vdev);
4017 return -EIO;
4018 }
4019 release_login_buffer(adapter);
4020 complete(&adapter->init_done);
4021
4022 return 0;
4023 }
4024
handle_request_unmap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4025 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4026 struct ibmvnic_adapter *adapter)
4027 {
4028 struct device *dev = &adapter->vdev->dev;
4029 long rc;
4030
4031 rc = crq->request_unmap_rsp.rc.code;
4032 if (rc)
4033 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4034 }
4035
handle_query_map_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4036 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4037 struct ibmvnic_adapter *adapter)
4038 {
4039 struct net_device *netdev = adapter->netdev;
4040 struct device *dev = &adapter->vdev->dev;
4041 long rc;
4042
4043 rc = crq->query_map_rsp.rc.code;
4044 if (rc) {
4045 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4046 return;
4047 }
4048 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4049 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4050 crq->query_map_rsp.free_pages);
4051 }
4052
handle_query_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4053 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4054 struct ibmvnic_adapter *adapter)
4055 {
4056 struct net_device *netdev = adapter->netdev;
4057 struct device *dev = &adapter->vdev->dev;
4058 long rc;
4059
4060 atomic_dec(&adapter->running_cap_crqs);
4061 netdev_dbg(netdev, "Outstanding queries: %d\n",
4062 atomic_read(&adapter->running_cap_crqs));
4063 rc = crq->query_capability.rc.code;
4064 if (rc) {
4065 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4066 goto out;
4067 }
4068
4069 switch (be16_to_cpu(crq->query_capability.capability)) {
4070 case MIN_TX_QUEUES:
4071 adapter->min_tx_queues =
4072 be64_to_cpu(crq->query_capability.number);
4073 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4074 adapter->min_tx_queues);
4075 break;
4076 case MIN_RX_QUEUES:
4077 adapter->min_rx_queues =
4078 be64_to_cpu(crq->query_capability.number);
4079 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4080 adapter->min_rx_queues);
4081 break;
4082 case MIN_RX_ADD_QUEUES:
4083 adapter->min_rx_add_queues =
4084 be64_to_cpu(crq->query_capability.number);
4085 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4086 adapter->min_rx_add_queues);
4087 break;
4088 case MAX_TX_QUEUES:
4089 adapter->max_tx_queues =
4090 be64_to_cpu(crq->query_capability.number);
4091 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4092 adapter->max_tx_queues);
4093 break;
4094 case MAX_RX_QUEUES:
4095 adapter->max_rx_queues =
4096 be64_to_cpu(crq->query_capability.number);
4097 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4098 adapter->max_rx_queues);
4099 break;
4100 case MAX_RX_ADD_QUEUES:
4101 adapter->max_rx_add_queues =
4102 be64_to_cpu(crq->query_capability.number);
4103 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4104 adapter->max_rx_add_queues);
4105 break;
4106 case MIN_TX_ENTRIES_PER_SUBCRQ:
4107 adapter->min_tx_entries_per_subcrq =
4108 be64_to_cpu(crq->query_capability.number);
4109 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4110 adapter->min_tx_entries_per_subcrq);
4111 break;
4112 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4113 adapter->min_rx_add_entries_per_subcrq =
4114 be64_to_cpu(crq->query_capability.number);
4115 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4116 adapter->min_rx_add_entries_per_subcrq);
4117 break;
4118 case MAX_TX_ENTRIES_PER_SUBCRQ:
4119 adapter->max_tx_entries_per_subcrq =
4120 be64_to_cpu(crq->query_capability.number);
4121 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4122 adapter->max_tx_entries_per_subcrq);
4123 break;
4124 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4125 adapter->max_rx_add_entries_per_subcrq =
4126 be64_to_cpu(crq->query_capability.number);
4127 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4128 adapter->max_rx_add_entries_per_subcrq);
4129 break;
4130 case TCP_IP_OFFLOAD:
4131 adapter->tcp_ip_offload =
4132 be64_to_cpu(crq->query_capability.number);
4133 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4134 adapter->tcp_ip_offload);
4135 break;
4136 case PROMISC_SUPPORTED:
4137 adapter->promisc_supported =
4138 be64_to_cpu(crq->query_capability.number);
4139 netdev_dbg(netdev, "promisc_supported = %lld\n",
4140 adapter->promisc_supported);
4141 break;
4142 case MIN_MTU:
4143 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4144 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4145 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4146 break;
4147 case MAX_MTU:
4148 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4149 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4150 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4151 break;
4152 case MAX_MULTICAST_FILTERS:
4153 adapter->max_multicast_filters =
4154 be64_to_cpu(crq->query_capability.number);
4155 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4156 adapter->max_multicast_filters);
4157 break;
4158 case VLAN_HEADER_INSERTION:
4159 adapter->vlan_header_insertion =
4160 be64_to_cpu(crq->query_capability.number);
4161 if (adapter->vlan_header_insertion)
4162 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4163 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4164 adapter->vlan_header_insertion);
4165 break;
4166 case RX_VLAN_HEADER_INSERTION:
4167 adapter->rx_vlan_header_insertion =
4168 be64_to_cpu(crq->query_capability.number);
4169 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4170 adapter->rx_vlan_header_insertion);
4171 break;
4172 case MAX_TX_SG_ENTRIES:
4173 adapter->max_tx_sg_entries =
4174 be64_to_cpu(crq->query_capability.number);
4175 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4176 adapter->max_tx_sg_entries);
4177 break;
4178 case RX_SG_SUPPORTED:
4179 adapter->rx_sg_supported =
4180 be64_to_cpu(crq->query_capability.number);
4181 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4182 adapter->rx_sg_supported);
4183 break;
4184 case OPT_TX_COMP_SUB_QUEUES:
4185 adapter->opt_tx_comp_sub_queues =
4186 be64_to_cpu(crq->query_capability.number);
4187 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4188 adapter->opt_tx_comp_sub_queues);
4189 break;
4190 case OPT_RX_COMP_QUEUES:
4191 adapter->opt_rx_comp_queues =
4192 be64_to_cpu(crq->query_capability.number);
4193 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4194 adapter->opt_rx_comp_queues);
4195 break;
4196 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4197 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4198 be64_to_cpu(crq->query_capability.number);
4199 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4200 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4201 break;
4202 case OPT_TX_ENTRIES_PER_SUBCRQ:
4203 adapter->opt_tx_entries_per_subcrq =
4204 be64_to_cpu(crq->query_capability.number);
4205 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4206 adapter->opt_tx_entries_per_subcrq);
4207 break;
4208 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4209 adapter->opt_rxba_entries_per_subcrq =
4210 be64_to_cpu(crq->query_capability.number);
4211 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4212 adapter->opt_rxba_entries_per_subcrq);
4213 break;
4214 case TX_RX_DESC_REQ:
4215 adapter->tx_rx_desc_req = crq->query_capability.number;
4216 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4217 adapter->tx_rx_desc_req);
4218 break;
4219
4220 default:
4221 netdev_err(netdev, "Got invalid cap rsp %d\n",
4222 crq->query_capability.capability);
4223 }
4224
4225 out:
4226 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4227 adapter->wait_capability = false;
4228 ibmvnic_send_req_caps(adapter, 0);
4229 }
4230 }
4231
ibmvnic_handle_crq(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4232 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4233 struct ibmvnic_adapter *adapter)
4234 {
4235 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4236 struct net_device *netdev = adapter->netdev;
4237 struct device *dev = &adapter->vdev->dev;
4238 u64 *u64_crq = (u64 *)crq;
4239 long rc;
4240
4241 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4242 (unsigned long int)cpu_to_be64(u64_crq[0]),
4243 (unsigned long int)cpu_to_be64(u64_crq[1]));
4244 switch (gen_crq->first) {
4245 case IBMVNIC_CRQ_INIT_RSP:
4246 switch (gen_crq->cmd) {
4247 case IBMVNIC_CRQ_INIT:
4248 dev_info(dev, "Partner initialized\n");
4249 adapter->from_passive_init = true;
4250 adapter->failover_pending = false;
4251 if (!completion_done(&adapter->init_done)) {
4252 complete(&adapter->init_done);
4253 adapter->init_done_rc = -EIO;
4254 }
4255 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4256 break;
4257 case IBMVNIC_CRQ_INIT_COMPLETE:
4258 dev_info(dev, "Partner initialization complete\n");
4259 adapter->crq.active = true;
4260 send_version_xchg(adapter);
4261 break;
4262 default:
4263 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4264 }
4265 return;
4266 case IBMVNIC_CRQ_XPORT_EVENT:
4267 netif_carrier_off(netdev);
4268 adapter->crq.active = false;
4269 if (adapter->resetting)
4270 adapter->force_reset_recovery = true;
4271 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4272 dev_info(dev, "Migrated, re-enabling adapter\n");
4273 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4274 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4275 dev_info(dev, "Backing device failover detected\n");
4276 adapter->failover_pending = true;
4277 } else {
4278 /* The adapter lost the connection */
4279 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4280 gen_crq->cmd);
4281 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4282 }
4283 return;
4284 case IBMVNIC_CRQ_CMD_RSP:
4285 break;
4286 default:
4287 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4288 gen_crq->first);
4289 return;
4290 }
4291
4292 switch (gen_crq->cmd) {
4293 case VERSION_EXCHANGE_RSP:
4294 rc = crq->version_exchange_rsp.rc.code;
4295 if (rc) {
4296 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4297 break;
4298 }
4299 dev_info(dev, "Partner protocol version is %d\n",
4300 crq->version_exchange_rsp.version);
4301 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4302 ibmvnic_version)
4303 ibmvnic_version =
4304 be16_to_cpu(crq->version_exchange_rsp.version);
4305 send_cap_queries(adapter);
4306 break;
4307 case QUERY_CAPABILITY_RSP:
4308 handle_query_cap_rsp(crq, adapter);
4309 break;
4310 case QUERY_MAP_RSP:
4311 handle_query_map_rsp(crq, adapter);
4312 break;
4313 case REQUEST_MAP_RSP:
4314 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4315 complete(&adapter->fw_done);
4316 break;
4317 case REQUEST_UNMAP_RSP:
4318 handle_request_unmap_rsp(crq, adapter);
4319 break;
4320 case REQUEST_CAPABILITY_RSP:
4321 handle_request_cap_rsp(crq, adapter);
4322 break;
4323 case LOGIN_RSP:
4324 netdev_dbg(netdev, "Got Login Response\n");
4325 handle_login_rsp(crq, adapter);
4326 break;
4327 case LOGICAL_LINK_STATE_RSP:
4328 netdev_dbg(netdev,
4329 "Got Logical Link State Response, state: %d rc: %d\n",
4330 crq->logical_link_state_rsp.link_state,
4331 crq->logical_link_state_rsp.rc.code);
4332 adapter->logical_link_state =
4333 crq->logical_link_state_rsp.link_state;
4334 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4335 complete(&adapter->init_done);
4336 break;
4337 case LINK_STATE_INDICATION:
4338 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4339 adapter->phys_link_state =
4340 crq->link_state_indication.phys_link_state;
4341 adapter->logical_link_state =
4342 crq->link_state_indication.logical_link_state;
4343 break;
4344 case CHANGE_MAC_ADDR_RSP:
4345 netdev_dbg(netdev, "Got MAC address change Response\n");
4346 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4347 break;
4348 case ERROR_INDICATION:
4349 netdev_dbg(netdev, "Got Error Indication\n");
4350 handle_error_indication(crq, adapter);
4351 break;
4352 case REQUEST_STATISTICS_RSP:
4353 netdev_dbg(netdev, "Got Statistics Response\n");
4354 complete(&adapter->stats_done);
4355 break;
4356 case QUERY_IP_OFFLOAD_RSP:
4357 netdev_dbg(netdev, "Got Query IP offload Response\n");
4358 handle_query_ip_offload_rsp(adapter);
4359 break;
4360 case MULTICAST_CTRL_RSP:
4361 netdev_dbg(netdev, "Got multicast control Response\n");
4362 break;
4363 case CONTROL_IP_OFFLOAD_RSP:
4364 netdev_dbg(netdev, "Got Control IP offload Response\n");
4365 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4366 sizeof(adapter->ip_offload_ctrl),
4367 DMA_TO_DEVICE);
4368 complete(&adapter->init_done);
4369 break;
4370 case COLLECT_FW_TRACE_RSP:
4371 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4372 complete(&adapter->fw_done);
4373 break;
4374 case GET_VPD_SIZE_RSP:
4375 handle_vpd_size_rsp(crq, adapter);
4376 break;
4377 case GET_VPD_RSP:
4378 handle_vpd_rsp(crq, adapter);
4379 break;
4380 default:
4381 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4382 gen_crq->cmd);
4383 }
4384 }
4385
ibmvnic_interrupt(int irq,void * instance)4386 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4387 {
4388 struct ibmvnic_adapter *adapter = instance;
4389
4390 tasklet_schedule(&adapter->tasklet);
4391 return IRQ_HANDLED;
4392 }
4393
ibmvnic_tasklet(void * data)4394 static void ibmvnic_tasklet(void *data)
4395 {
4396 struct ibmvnic_adapter *adapter = data;
4397 struct ibmvnic_crq_queue *queue = &adapter->crq;
4398 union ibmvnic_crq *crq;
4399 unsigned long flags;
4400 bool done = false;
4401
4402 spin_lock_irqsave(&queue->lock, flags);
4403 while (!done) {
4404 /* Pull all the valid messages off the CRQ */
4405 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4406 ibmvnic_handle_crq(crq, adapter);
4407 crq->generic.first = 0;
4408 }
4409
4410 /* remain in tasklet until all
4411 * capabilities responses are received
4412 */
4413 if (!adapter->wait_capability)
4414 done = true;
4415 }
4416 /* if capabilities CRQ's were sent in this tasklet, the following
4417 * tasklet must wait until all responses are received
4418 */
4419 if (atomic_read(&adapter->running_cap_crqs) != 0)
4420 adapter->wait_capability = true;
4421 spin_unlock_irqrestore(&queue->lock, flags);
4422 }
4423
ibmvnic_reenable_crq_queue(struct ibmvnic_adapter * adapter)4424 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4425 {
4426 struct vio_dev *vdev = adapter->vdev;
4427 int rc;
4428
4429 do {
4430 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4431 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4432
4433 if (rc)
4434 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4435
4436 return rc;
4437 }
4438
ibmvnic_reset_crq(struct ibmvnic_adapter * adapter)4439 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4440 {
4441 struct ibmvnic_crq_queue *crq = &adapter->crq;
4442 struct device *dev = &adapter->vdev->dev;
4443 struct vio_dev *vdev = adapter->vdev;
4444 int rc;
4445
4446 /* Close the CRQ */
4447 do {
4448 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4449 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4450
4451 /* Clean out the queue */
4452 memset(crq->msgs, 0, PAGE_SIZE);
4453 crq->cur = 0;
4454 crq->active = false;
4455
4456 /* And re-open it again */
4457 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4458 crq->msg_token, PAGE_SIZE);
4459
4460 if (rc == H_CLOSED)
4461 /* Adapter is good, but other end is not ready */
4462 dev_warn(dev, "Partner adapter not ready\n");
4463 else if (rc != 0)
4464 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4465
4466 return rc;
4467 }
4468
release_crq_queue(struct ibmvnic_adapter * adapter)4469 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4470 {
4471 struct ibmvnic_crq_queue *crq = &adapter->crq;
4472 struct vio_dev *vdev = adapter->vdev;
4473 long rc;
4474
4475 if (!crq->msgs)
4476 return;
4477
4478 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4479 free_irq(vdev->irq, adapter);
4480 tasklet_kill(&adapter->tasklet);
4481 do {
4482 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4483 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4484
4485 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4486 DMA_BIDIRECTIONAL);
4487 free_page((unsigned long)crq->msgs);
4488 crq->msgs = NULL;
4489 crq->active = false;
4490 }
4491
init_crq_queue(struct ibmvnic_adapter * adapter)4492 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4493 {
4494 struct ibmvnic_crq_queue *crq = &adapter->crq;
4495 struct device *dev = &adapter->vdev->dev;
4496 struct vio_dev *vdev = adapter->vdev;
4497 int rc, retrc = -ENOMEM;
4498
4499 if (crq->msgs)
4500 return 0;
4501
4502 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4503 /* Should we allocate more than one page? */
4504
4505 if (!crq->msgs)
4506 return -ENOMEM;
4507
4508 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4509 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4510 DMA_BIDIRECTIONAL);
4511 if (dma_mapping_error(dev, crq->msg_token))
4512 goto map_failed;
4513
4514 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4515 crq->msg_token, PAGE_SIZE);
4516
4517 if (rc == H_RESOURCE)
4518 /* maybe kexecing and resource is busy. try a reset */
4519 rc = ibmvnic_reset_crq(adapter);
4520 retrc = rc;
4521
4522 if (rc == H_CLOSED) {
4523 dev_warn(dev, "Partner adapter not ready\n");
4524 } else if (rc) {
4525 dev_warn(dev, "Error %d opening adapter\n", rc);
4526 goto reg_crq_failed;
4527 }
4528
4529 retrc = 0;
4530
4531 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4532 (unsigned long)adapter);
4533
4534 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4535 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4536 adapter);
4537 if (rc) {
4538 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4539 vdev->irq, rc);
4540 goto req_irq_failed;
4541 }
4542
4543 rc = vio_enable_interrupts(vdev);
4544 if (rc) {
4545 dev_err(dev, "Error %d enabling interrupts\n", rc);
4546 goto req_irq_failed;
4547 }
4548
4549 crq->cur = 0;
4550 spin_lock_init(&crq->lock);
4551
4552 return retrc;
4553
4554 req_irq_failed:
4555 tasklet_kill(&adapter->tasklet);
4556 do {
4557 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4558 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4559 reg_crq_failed:
4560 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4561 map_failed:
4562 free_page((unsigned long)crq->msgs);
4563 crq->msgs = NULL;
4564 return retrc;
4565 }
4566
ibmvnic_reset_init(struct ibmvnic_adapter * adapter)4567 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4568 {
4569 struct device *dev = &adapter->vdev->dev;
4570 unsigned long timeout = msecs_to_jiffies(30000);
4571 u64 old_num_rx_queues, old_num_tx_queues;
4572 int rc;
4573
4574 adapter->from_passive_init = false;
4575
4576 old_num_rx_queues = adapter->req_rx_queues;
4577 old_num_tx_queues = adapter->req_tx_queues;
4578
4579 init_completion(&adapter->init_done);
4580 adapter->init_done_rc = 0;
4581 ibmvnic_send_crq_init(adapter);
4582 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4583 dev_err(dev, "Initialization sequence timed out\n");
4584 return -1;
4585 }
4586
4587 if (adapter->init_done_rc) {
4588 release_crq_queue(adapter);
4589 return adapter->init_done_rc;
4590 }
4591
4592 if (adapter->from_passive_init) {
4593 adapter->state = VNIC_OPEN;
4594 adapter->from_passive_init = false;
4595 return -1;
4596 }
4597
4598 if (adapter->resetting && !adapter->wait_for_reset &&
4599 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4600 if (adapter->req_rx_queues != old_num_rx_queues ||
4601 adapter->req_tx_queues != old_num_tx_queues) {
4602 release_sub_crqs(adapter, 0);
4603 rc = init_sub_crqs(adapter);
4604 } else {
4605 rc = reset_sub_crq_queues(adapter);
4606 }
4607 } else {
4608 rc = init_sub_crqs(adapter);
4609 }
4610
4611 if (rc) {
4612 dev_err(dev, "Initialization of sub crqs failed\n");
4613 release_crq_queue(adapter);
4614 return rc;
4615 }
4616
4617 rc = init_sub_crq_irqs(adapter);
4618 if (rc) {
4619 dev_err(dev, "Failed to initialize sub crq irqs\n");
4620 release_crq_queue(adapter);
4621 }
4622
4623 return rc;
4624 }
4625
ibmvnic_init(struct ibmvnic_adapter * adapter)4626 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4627 {
4628 struct device *dev = &adapter->vdev->dev;
4629 unsigned long timeout = msecs_to_jiffies(30000);
4630 int rc;
4631
4632 adapter->from_passive_init = false;
4633
4634 init_completion(&adapter->init_done);
4635 adapter->init_done_rc = 0;
4636 ibmvnic_send_crq_init(adapter);
4637 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4638 dev_err(dev, "Initialization sequence timed out\n");
4639 return -1;
4640 }
4641
4642 if (adapter->init_done_rc) {
4643 release_crq_queue(adapter);
4644 return adapter->init_done_rc;
4645 }
4646
4647 if (adapter->from_passive_init) {
4648 adapter->state = VNIC_OPEN;
4649 adapter->from_passive_init = false;
4650 return -1;
4651 }
4652
4653 rc = init_sub_crqs(adapter);
4654 if (rc) {
4655 dev_err(dev, "Initialization of sub crqs failed\n");
4656 release_crq_queue(adapter);
4657 return rc;
4658 }
4659
4660 rc = init_sub_crq_irqs(adapter);
4661 if (rc) {
4662 dev_err(dev, "Failed to initialize sub crq irqs\n");
4663 release_crq_queue(adapter);
4664 }
4665
4666 return rc;
4667 }
4668
4669 static struct device_attribute dev_attr_failover;
4670
ibmvnic_probe(struct vio_dev * dev,const struct vio_device_id * id)4671 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4672 {
4673 struct ibmvnic_adapter *adapter;
4674 struct net_device *netdev;
4675 unsigned char *mac_addr_p;
4676 int rc;
4677
4678 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4679 dev->unit_address);
4680
4681 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4682 VETH_MAC_ADDR, NULL);
4683 if (!mac_addr_p) {
4684 dev_err(&dev->dev,
4685 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4686 __FILE__, __LINE__);
4687 return 0;
4688 }
4689
4690 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4691 IBMVNIC_MAX_QUEUES);
4692 if (!netdev)
4693 return -ENOMEM;
4694
4695 adapter = netdev_priv(netdev);
4696 adapter->state = VNIC_PROBING;
4697 dev_set_drvdata(&dev->dev, netdev);
4698 adapter->vdev = dev;
4699 adapter->netdev = netdev;
4700
4701 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4702 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4703 netdev->irq = dev->irq;
4704 netdev->netdev_ops = &ibmvnic_netdev_ops;
4705 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4706 SET_NETDEV_DEV(netdev, &dev->dev);
4707
4708 spin_lock_init(&adapter->stats_lock);
4709
4710 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4711 INIT_LIST_HEAD(&adapter->rwi_list);
4712 mutex_init(&adapter->reset_lock);
4713 mutex_init(&adapter->rwi_lock);
4714 adapter->resetting = false;
4715
4716 adapter->mac_change_pending = false;
4717
4718 do {
4719 rc = init_crq_queue(adapter);
4720 if (rc) {
4721 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4722 rc);
4723 goto ibmvnic_init_fail;
4724 }
4725
4726 rc = ibmvnic_init(adapter);
4727 if (rc && rc != EAGAIN)
4728 goto ibmvnic_init_fail;
4729 } while (rc == EAGAIN);
4730
4731 rc = init_stats_buffers(adapter);
4732 if (rc)
4733 goto ibmvnic_init_fail;
4734
4735 rc = init_stats_token(adapter);
4736 if (rc)
4737 goto ibmvnic_stats_fail;
4738
4739 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4740 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4741 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4742
4743 rc = device_create_file(&dev->dev, &dev_attr_failover);
4744 if (rc)
4745 goto ibmvnic_dev_file_err;
4746
4747 netif_carrier_off(netdev);
4748 rc = register_netdev(netdev);
4749 if (rc) {
4750 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4751 goto ibmvnic_register_fail;
4752 }
4753 dev_info(&dev->dev, "ibmvnic registered\n");
4754
4755 adapter->state = VNIC_PROBED;
4756
4757 adapter->wait_for_reset = false;
4758
4759 return 0;
4760
4761 ibmvnic_register_fail:
4762 device_remove_file(&dev->dev, &dev_attr_failover);
4763
4764 ibmvnic_dev_file_err:
4765 release_stats_token(adapter);
4766
4767 ibmvnic_stats_fail:
4768 release_stats_buffers(adapter);
4769
4770 ibmvnic_init_fail:
4771 release_sub_crqs(adapter, 1);
4772 release_crq_queue(adapter);
4773 free_netdev(netdev);
4774
4775 return rc;
4776 }
4777
ibmvnic_remove(struct vio_dev * dev)4778 static int ibmvnic_remove(struct vio_dev *dev)
4779 {
4780 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4781 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4782
4783 adapter->state = VNIC_REMOVING;
4784 unregister_netdev(netdev);
4785 mutex_lock(&adapter->reset_lock);
4786
4787 release_resources(adapter);
4788 release_sub_crqs(adapter, 1);
4789 release_crq_queue(adapter);
4790
4791 release_stats_token(adapter);
4792 release_stats_buffers(adapter);
4793
4794 adapter->state = VNIC_REMOVED;
4795
4796 mutex_unlock(&adapter->reset_lock);
4797 device_remove_file(&dev->dev, &dev_attr_failover);
4798 free_netdev(netdev);
4799 dev_set_drvdata(&dev->dev, NULL);
4800
4801 return 0;
4802 }
4803
failover_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4804 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4805 const char *buf, size_t count)
4806 {
4807 struct net_device *netdev = dev_get_drvdata(dev);
4808 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4809 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4810 __be64 session_token;
4811 long rc;
4812
4813 if (!sysfs_streq(buf, "1"))
4814 return -EINVAL;
4815
4816 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4817 H_GET_SESSION_TOKEN, 0, 0, 0);
4818 if (rc) {
4819 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4820 rc);
4821 return -EINVAL;
4822 }
4823
4824 session_token = (__be64)retbuf[0];
4825 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4826 be64_to_cpu(session_token));
4827 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4828 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4829 if (rc) {
4830 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4831 rc);
4832 return -EINVAL;
4833 }
4834
4835 return count;
4836 }
4837
4838 static DEVICE_ATTR_WO(failover);
4839
ibmvnic_get_desired_dma(struct vio_dev * vdev)4840 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4841 {
4842 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4843 struct ibmvnic_adapter *adapter;
4844 struct iommu_table *tbl;
4845 unsigned long ret = 0;
4846 int i;
4847
4848 tbl = get_iommu_table_base(&vdev->dev);
4849
4850 /* netdev inits at probe time along with the structures we need below*/
4851 if (!netdev)
4852 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4853
4854 adapter = netdev_priv(netdev);
4855
4856 ret += PAGE_SIZE; /* the crq message queue */
4857 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4858
4859 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4860 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4861
4862 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4863 i++)
4864 ret += adapter->rx_pool[i].size *
4865 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4866
4867 return ret;
4868 }
4869
ibmvnic_resume(struct device * dev)4870 static int ibmvnic_resume(struct device *dev)
4871 {
4872 struct net_device *netdev = dev_get_drvdata(dev);
4873 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4874
4875 if (adapter->state != VNIC_OPEN)
4876 return 0;
4877
4878 tasklet_schedule(&adapter->tasklet);
4879
4880 return 0;
4881 }
4882
4883 static const struct vio_device_id ibmvnic_device_table[] = {
4884 {"network", "IBM,vnic"},
4885 {"", "" }
4886 };
4887 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4888
4889 static const struct dev_pm_ops ibmvnic_pm_ops = {
4890 .resume = ibmvnic_resume
4891 };
4892
4893 static struct vio_driver ibmvnic_driver = {
4894 .id_table = ibmvnic_device_table,
4895 .probe = ibmvnic_probe,
4896 .remove = ibmvnic_remove,
4897 .get_desired_dma = ibmvnic_get_desired_dma,
4898 .name = ibmvnic_driver_name,
4899 .pm = &ibmvnic_pm_ops,
4900 };
4901
4902 /* module functions */
ibmvnic_module_init(void)4903 static int __init ibmvnic_module_init(void)
4904 {
4905 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4906 IBMVNIC_DRIVER_VERSION);
4907
4908 return vio_register_driver(&ibmvnic_driver);
4909 }
4910
ibmvnic_module_exit(void)4911 static void __exit ibmvnic_module_exit(void)
4912 {
4913 vio_unregister_driver(&ibmvnic_driver);
4914 }
4915
4916 module_init(ibmvnic_module_init);
4917 module_exit(ibmvnic_module_exit);
4918
