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/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
72 #include <asm/vio.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
78
79 #include "ibmvnic.h"
80
81 static const char ibmvnic_driver_name[] = "ibmvnic";
82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84 MODULE_AUTHOR("Santiago Leon");
85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90 static int ibmvnic_remove(struct vio_dev *);
91 static void release_sub_crqs(struct ibmvnic_adapter *);
92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100 static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102 static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static int ibmvnic_poll(struct napi_struct *napi, int data);
109 static void send_map_query(struct ibmvnic_adapter *adapter);
110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
112 static void send_login(struct ibmvnic_adapter *adapter);
113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
114 static int init_sub_crqs(struct ibmvnic_adapter *);
115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
116 static int ibmvnic_init(struct ibmvnic_adapter *);
117 static void release_crq_queue(struct ibmvnic_adapter *);
118
119 struct ibmvnic_stat {
120 char name[ETH_GSTRING_LEN];
121 int offset;
122 };
123
124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
125 offsetof(struct ibmvnic_statistics, stat))
126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
127
128 static const struct ibmvnic_stat ibmvnic_stats[] = {
129 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
130 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
131 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
132 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
133 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
134 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
135 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
136 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
137 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
138 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
139 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
140 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
141 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
142 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
143 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
144 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
145 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
146 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
147 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
148 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
149 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
150 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
151 };
152
h_reg_sub_crq(unsigned long unit_address,unsigned long token,unsigned long length,unsigned long * number,unsigned long * irq)153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
154 unsigned long length, unsigned long *number,
155 unsigned long *irq)
156 {
157 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
158 long rc;
159
160 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
161 *number = retbuf[0];
162 *irq = retbuf[1];
163
164 return rc;
165 }
166
alloc_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb,int size)167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
168 struct ibmvnic_long_term_buff *ltb, int size)
169 {
170 struct device *dev = &adapter->vdev->dev;
171
172 ltb->size = size;
173 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
174 GFP_KERNEL);
175
176 if (!ltb->buff) {
177 dev_err(dev, "Couldn't alloc long term buffer\n");
178 return -ENOMEM;
179 }
180 ltb->map_id = adapter->map_id;
181 adapter->map_id++;
182
183 init_completion(&adapter->fw_done);
184 send_request_map(adapter, ltb->addr,
185 ltb->size, ltb->map_id);
186 wait_for_completion(&adapter->fw_done);
187
188 if (adapter->fw_done_rc) {
189 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
190 adapter->fw_done_rc);
191 return -1;
192 }
193 return 0;
194 }
195
free_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
198 {
199 struct device *dev = &adapter->vdev->dev;
200
201 if (!ltb->buff)
202 return;
203
204 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
205 adapter->reset_reason != VNIC_RESET_MOBILITY)
206 send_request_unmap(adapter, ltb->map_id);
207 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
208 }
209
reset_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_long_term_buff *ltb)
212 {
213 memset(ltb->buff, 0, ltb->size);
214
215 init_completion(&adapter->fw_done);
216 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
217 wait_for_completion(&adapter->fw_done);
218
219 if (adapter->fw_done_rc) {
220 dev_info(&adapter->vdev->dev,
221 "Reset failed, attempting to free and reallocate buffer\n");
222 free_long_term_buff(adapter, ltb);
223 return alloc_long_term_buff(adapter, ltb, ltb->size);
224 }
225 return 0;
226 }
227
deactivate_rx_pools(struct ibmvnic_adapter * adapter)228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
229 {
230 int i;
231
232 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
233 i++)
234 adapter->rx_pool[i].active = 0;
235 }
236
replenish_rx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_pool * pool)237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
238 struct ibmvnic_rx_pool *pool)
239 {
240 int count = pool->size - atomic_read(&pool->available);
241 struct device *dev = &adapter->vdev->dev;
242 int buffers_added = 0;
243 unsigned long lpar_rc;
244 union sub_crq sub_crq;
245 struct sk_buff *skb;
246 unsigned int offset;
247 dma_addr_t dma_addr;
248 unsigned char *dst;
249 u64 *handle_array;
250 int shift = 0;
251 int index;
252 int i;
253
254 if (!pool->active)
255 return;
256
257 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
258 be32_to_cpu(adapter->login_rsp_buf->
259 off_rxadd_subcrqs));
260
261 for (i = 0; i < count; ++i) {
262 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
263 if (!skb) {
264 dev_err(dev, "Couldn't replenish rx buff\n");
265 adapter->replenish_no_mem++;
266 break;
267 }
268
269 index = pool->free_map[pool->next_free];
270
271 if (pool->rx_buff[index].skb)
272 dev_err(dev, "Inconsistent free_map!\n");
273
274 /* Copy the skb to the long term mapped DMA buffer */
275 offset = index * pool->buff_size;
276 dst = pool->long_term_buff.buff + offset;
277 memset(dst, 0, pool->buff_size);
278 dma_addr = pool->long_term_buff.addr + offset;
279 pool->rx_buff[index].data = dst;
280
281 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
282 pool->rx_buff[index].dma = dma_addr;
283 pool->rx_buff[index].skb = skb;
284 pool->rx_buff[index].pool_index = pool->index;
285 pool->rx_buff[index].size = pool->buff_size;
286
287 memset(&sub_crq, 0, sizeof(sub_crq));
288 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
289 sub_crq.rx_add.correlator =
290 cpu_to_be64((u64)&pool->rx_buff[index]);
291 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
292 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
293
294 /* The length field of the sCRQ is defined to be 24 bits so the
295 * buffer size needs to be left shifted by a byte before it is
296 * converted to big endian to prevent the last byte from being
297 * truncated.
298 */
299 #ifdef __LITTLE_ENDIAN__
300 shift = 8;
301 #endif
302 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
303
304 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
305 &sub_crq);
306 if (lpar_rc != H_SUCCESS)
307 goto failure;
308
309 buffers_added++;
310 adapter->replenish_add_buff_success++;
311 pool->next_free = (pool->next_free + 1) % pool->size;
312 }
313 atomic_add(buffers_added, &pool->available);
314 return;
315
316 failure:
317 dev_info(dev, "replenish pools failure\n");
318 pool->free_map[pool->next_free] = index;
319 pool->rx_buff[index].skb = NULL;
320 if (!dma_mapping_error(dev, dma_addr))
321 dma_unmap_single(dev, dma_addr, pool->buff_size,
322 DMA_FROM_DEVICE);
323
324 dev_kfree_skb_any(skb);
325 adapter->replenish_add_buff_failure++;
326 atomic_add(buffers_added, &pool->available);
327
328 if (lpar_rc == H_CLOSED) {
329 /* Disable buffer pool replenishment and report carrier off if
330 * queue is closed. Firmware guarantees that a signal will
331 * be sent to the driver, triggering a reset.
332 */
333 deactivate_rx_pools(adapter);
334 netif_carrier_off(adapter->netdev);
335 }
336 }
337
replenish_pools(struct ibmvnic_adapter * adapter)338 static void replenish_pools(struct ibmvnic_adapter *adapter)
339 {
340 int i;
341
342 adapter->replenish_task_cycles++;
343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 i++) {
345 if (adapter->rx_pool[i].active)
346 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
347 }
348 }
349
release_stats_buffers(struct ibmvnic_adapter * adapter)350 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
351 {
352 kfree(adapter->tx_stats_buffers);
353 kfree(adapter->rx_stats_buffers);
354 }
355
init_stats_buffers(struct ibmvnic_adapter * adapter)356 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
357 {
358 adapter->tx_stats_buffers =
359 kcalloc(adapter->req_tx_queues,
360 sizeof(struct ibmvnic_tx_queue_stats),
361 GFP_KERNEL);
362 if (!adapter->tx_stats_buffers)
363 return -ENOMEM;
364
365 adapter->rx_stats_buffers =
366 kcalloc(adapter->req_rx_queues,
367 sizeof(struct ibmvnic_rx_queue_stats),
368 GFP_KERNEL);
369 if (!adapter->rx_stats_buffers)
370 return -ENOMEM;
371
372 return 0;
373 }
374
release_stats_token(struct ibmvnic_adapter * adapter)375 static void release_stats_token(struct ibmvnic_adapter *adapter)
376 {
377 struct device *dev = &adapter->vdev->dev;
378
379 if (!adapter->stats_token)
380 return;
381
382 dma_unmap_single(dev, adapter->stats_token,
383 sizeof(struct ibmvnic_statistics),
384 DMA_FROM_DEVICE);
385 adapter->stats_token = 0;
386 }
387
init_stats_token(struct ibmvnic_adapter * adapter)388 static int init_stats_token(struct ibmvnic_adapter *adapter)
389 {
390 struct device *dev = &adapter->vdev->dev;
391 dma_addr_t stok;
392
393 stok = dma_map_single(dev, &adapter->stats,
394 sizeof(struct ibmvnic_statistics),
395 DMA_FROM_DEVICE);
396 if (dma_mapping_error(dev, stok)) {
397 dev_err(dev, "Couldn't map stats buffer\n");
398 return -1;
399 }
400
401 adapter->stats_token = stok;
402 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
403 return 0;
404 }
405
reset_rx_pools(struct ibmvnic_adapter * adapter)406 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
407 {
408 struct ibmvnic_rx_pool *rx_pool;
409 int rx_scrqs;
410 int i, j, rc;
411
412 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
413 for (i = 0; i < rx_scrqs; i++) {
414 rx_pool = &adapter->rx_pool[i];
415
416 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
417
418 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
419 if (rc)
420 return rc;
421
422 for (j = 0; j < rx_pool->size; j++)
423 rx_pool->free_map[j] = j;
424
425 memset(rx_pool->rx_buff, 0,
426 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
427
428 atomic_set(&rx_pool->available, 0);
429 rx_pool->next_alloc = 0;
430 rx_pool->next_free = 0;
431 rx_pool->active = 1;
432 }
433
434 return 0;
435 }
436
release_rx_pools(struct ibmvnic_adapter * adapter)437 static void release_rx_pools(struct ibmvnic_adapter *adapter)
438 {
439 struct ibmvnic_rx_pool *rx_pool;
440 int rx_scrqs;
441 int i, j;
442
443 if (!adapter->rx_pool)
444 return;
445
446 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
447 for (i = 0; i < rx_scrqs; i++) {
448 rx_pool = &adapter->rx_pool[i];
449
450 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
451
452 kfree(rx_pool->free_map);
453 free_long_term_buff(adapter, &rx_pool->long_term_buff);
454
455 if (!rx_pool->rx_buff)
456 continue;
457
458 for (j = 0; j < rx_pool->size; j++) {
459 if (rx_pool->rx_buff[j].skb) {
460 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
461 rx_pool->rx_buff[j].skb = NULL;
462 }
463 }
464
465 kfree(rx_pool->rx_buff);
466 }
467
468 kfree(adapter->rx_pool);
469 adapter->rx_pool = NULL;
470 }
471
init_rx_pools(struct net_device * netdev)472 static int init_rx_pools(struct net_device *netdev)
473 {
474 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
475 struct device *dev = &adapter->vdev->dev;
476 struct ibmvnic_rx_pool *rx_pool;
477 int rxadd_subcrqs;
478 u64 *size_array;
479 int i, j;
480
481 rxadd_subcrqs =
482 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
483 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
484 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
485
486 adapter->rx_pool = kcalloc(rxadd_subcrqs,
487 sizeof(struct ibmvnic_rx_pool),
488 GFP_KERNEL);
489 if (!adapter->rx_pool) {
490 dev_err(dev, "Failed to allocate rx pools\n");
491 return -1;
492 }
493
494 for (i = 0; i < rxadd_subcrqs; i++) {
495 rx_pool = &adapter->rx_pool[i];
496
497 netdev_dbg(adapter->netdev,
498 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
499 i, adapter->req_rx_add_entries_per_subcrq,
500 be64_to_cpu(size_array[i]));
501
502 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
503 rx_pool->index = i;
504 rx_pool->buff_size = be64_to_cpu(size_array[i]);
505 rx_pool->active = 1;
506
507 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
508 GFP_KERNEL);
509 if (!rx_pool->free_map) {
510 release_rx_pools(adapter);
511 return -1;
512 }
513
514 rx_pool->rx_buff = kcalloc(rx_pool->size,
515 sizeof(struct ibmvnic_rx_buff),
516 GFP_KERNEL);
517 if (!rx_pool->rx_buff) {
518 dev_err(dev, "Couldn't alloc rx buffers\n");
519 release_rx_pools(adapter);
520 return -1;
521 }
522
523 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
524 rx_pool->size * rx_pool->buff_size)) {
525 release_rx_pools(adapter);
526 return -1;
527 }
528
529 for (j = 0; j < rx_pool->size; ++j)
530 rx_pool->free_map[j] = j;
531
532 atomic_set(&rx_pool->available, 0);
533 rx_pool->next_alloc = 0;
534 rx_pool->next_free = 0;
535 }
536
537 return 0;
538 }
539
reset_tx_pools(struct ibmvnic_adapter * adapter)540 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
541 {
542 struct ibmvnic_tx_pool *tx_pool;
543 int tx_scrqs;
544 int i, j, rc;
545
546 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 for (i = 0; i < tx_scrqs; i++) {
548 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
549
550 tx_pool = &adapter->tx_pool[i];
551
552 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
553 if (rc)
554 return rc;
555
556 memset(tx_pool->tx_buff, 0,
557 adapter->req_tx_entries_per_subcrq *
558 sizeof(struct ibmvnic_tx_buff));
559
560 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
561 tx_pool->free_map[j] = j;
562
563 tx_pool->consumer_index = 0;
564 tx_pool->producer_index = 0;
565 }
566
567 return 0;
568 }
569
release_tx_pools(struct ibmvnic_adapter * adapter)570 static void release_tx_pools(struct ibmvnic_adapter *adapter)
571 {
572 struct ibmvnic_tx_pool *tx_pool;
573 int i, tx_scrqs;
574
575 if (!adapter->tx_pool)
576 return;
577
578 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
579 for (i = 0; i < tx_scrqs; i++) {
580 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
581 tx_pool = &adapter->tx_pool[i];
582 kfree(tx_pool->tx_buff);
583 free_long_term_buff(adapter, &tx_pool->long_term_buff);
584 kfree(tx_pool->free_map);
585 }
586
587 kfree(adapter->tx_pool);
588 adapter->tx_pool = NULL;
589 }
590
init_tx_pools(struct net_device * netdev)591 static int init_tx_pools(struct net_device *netdev)
592 {
593 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
594 struct device *dev = &adapter->vdev->dev;
595 struct ibmvnic_tx_pool *tx_pool;
596 int tx_subcrqs;
597 int i, j;
598
599 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
600 adapter->tx_pool = kcalloc(tx_subcrqs,
601 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
602 if (!adapter->tx_pool)
603 return -1;
604
605 for (i = 0; i < tx_subcrqs; i++) {
606 tx_pool = &adapter->tx_pool[i];
607
608 netdev_dbg(adapter->netdev,
609 "Initializing tx_pool[%d], %lld buffs\n",
610 i, adapter->req_tx_entries_per_subcrq);
611
612 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
613 sizeof(struct ibmvnic_tx_buff),
614 GFP_KERNEL);
615 if (!tx_pool->tx_buff) {
616 dev_err(dev, "tx pool buffer allocation failed\n");
617 release_tx_pools(adapter);
618 return -1;
619 }
620
621 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
622 adapter->req_tx_entries_per_subcrq *
623 adapter->req_mtu)) {
624 release_tx_pools(adapter);
625 return -1;
626 }
627
628 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
629 sizeof(int), GFP_KERNEL);
630 if (!tx_pool->free_map) {
631 release_tx_pools(adapter);
632 return -1;
633 }
634
635 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
636 tx_pool->free_map[j] = j;
637
638 tx_pool->consumer_index = 0;
639 tx_pool->producer_index = 0;
640 }
641
642 return 0;
643 }
644
release_error_buffers(struct ibmvnic_adapter * adapter)645 static void release_error_buffers(struct ibmvnic_adapter *adapter)
646 {
647 struct device *dev = &adapter->vdev->dev;
648 struct ibmvnic_error_buff *error_buff, *tmp;
649 unsigned long flags;
650
651 spin_lock_irqsave(&adapter->error_list_lock, flags);
652 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
653 list_del(&error_buff->list);
654 dma_unmap_single(dev, error_buff->dma, error_buff->len,
655 DMA_FROM_DEVICE);
656 kfree(error_buff->buff);
657 kfree(error_buff);
658 }
659 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
660 }
661
ibmvnic_napi_enable(struct ibmvnic_adapter * adapter)662 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
663 {
664 int i;
665
666 if (adapter->napi_enabled)
667 return;
668
669 for (i = 0; i < adapter->req_rx_queues; i++)
670 napi_enable(&adapter->napi[i]);
671
672 adapter->napi_enabled = true;
673 }
674
ibmvnic_napi_disable(struct ibmvnic_adapter * adapter)675 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
676 {
677 int i;
678
679 if (!adapter->napi_enabled)
680 return;
681
682 for (i = 0; i < adapter->req_rx_queues; i++) {
683 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
684 napi_disable(&adapter->napi[i]);
685 }
686
687 adapter->napi_enabled = false;
688 }
689
ibmvnic_login(struct net_device * netdev)690 static int ibmvnic_login(struct net_device *netdev)
691 {
692 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
693 unsigned long timeout = msecs_to_jiffies(30000);
694 struct device *dev = &adapter->vdev->dev;
695 int rc;
696
697 do {
698 if (adapter->renegotiate) {
699 adapter->renegotiate = false;
700 release_sub_crqs(adapter);
701
702 reinit_completion(&adapter->init_done);
703 send_cap_queries(adapter);
704 if (!wait_for_completion_timeout(&adapter->init_done,
705 timeout)) {
706 dev_err(dev, "Capabilities query timeout\n");
707 return -1;
708 }
709 rc = init_sub_crqs(adapter);
710 if (rc) {
711 dev_err(dev,
712 "Initialization of SCRQ's failed\n");
713 return -1;
714 }
715 rc = init_sub_crq_irqs(adapter);
716 if (rc) {
717 dev_err(dev,
718 "Initialization of SCRQ's irqs failed\n");
719 return -1;
720 }
721 }
722
723 reinit_completion(&adapter->init_done);
724 send_login(adapter);
725 if (!wait_for_completion_timeout(&adapter->init_done,
726 timeout)) {
727 dev_err(dev, "Login timeout\n");
728 return -1;
729 }
730 } while (adapter->renegotiate);
731
732 return 0;
733 }
734
release_resources(struct ibmvnic_adapter * adapter)735 static void release_resources(struct ibmvnic_adapter *adapter)
736 {
737 int i;
738
739 release_tx_pools(adapter);
740 release_rx_pools(adapter);
741
742 release_stats_token(adapter);
743 release_stats_buffers(adapter);
744 release_error_buffers(adapter);
745
746 if (adapter->napi) {
747 for (i = 0; i < adapter->req_rx_queues; i++) {
748 if (&adapter->napi[i]) {
749 netdev_dbg(adapter->netdev,
750 "Releasing napi[%d]\n", i);
751 netif_napi_del(&adapter->napi[i]);
752 }
753 }
754 }
755 }
756
set_link_state(struct ibmvnic_adapter * adapter,u8 link_state)757 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
758 {
759 struct net_device *netdev = adapter->netdev;
760 unsigned long timeout = msecs_to_jiffies(30000);
761 union ibmvnic_crq crq;
762 bool resend;
763 int rc;
764
765 netdev_dbg(netdev, "setting link state %d\n", link_state);
766
767 memset(&crq, 0, sizeof(crq));
768 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
769 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
770 crq.logical_link_state.link_state = link_state;
771
772 do {
773 resend = false;
774
775 reinit_completion(&adapter->init_done);
776 rc = ibmvnic_send_crq(adapter, &crq);
777 if (rc) {
778 netdev_err(netdev, "Failed to set link state\n");
779 return rc;
780 }
781
782 if (!wait_for_completion_timeout(&adapter->init_done,
783 timeout)) {
784 netdev_err(netdev, "timeout setting link state\n");
785 return -1;
786 }
787
788 if (adapter->init_done_rc == 1) {
789 /* Partuial success, delay and re-send */
790 mdelay(1000);
791 resend = true;
792 }
793 } while (resend);
794
795 return 0;
796 }
797
set_real_num_queues(struct net_device * netdev)798 static int set_real_num_queues(struct net_device *netdev)
799 {
800 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
801 int rc;
802
803 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
804 adapter->req_tx_queues, adapter->req_rx_queues);
805
806 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
807 if (rc) {
808 netdev_err(netdev, "failed to set the number of tx queues\n");
809 return rc;
810 }
811
812 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
813 if (rc)
814 netdev_err(netdev, "failed to set the number of rx queues\n");
815
816 return rc;
817 }
818
init_resources(struct ibmvnic_adapter * adapter)819 static int init_resources(struct ibmvnic_adapter *adapter)
820 {
821 struct net_device *netdev = adapter->netdev;
822 int i, rc;
823
824 rc = set_real_num_queues(netdev);
825 if (rc)
826 return rc;
827
828 rc = init_stats_buffers(adapter);
829 if (rc)
830 return rc;
831
832 rc = init_stats_token(adapter);
833 if (rc)
834 return rc;
835
836 adapter->map_id = 1;
837 adapter->napi = kcalloc(adapter->req_rx_queues,
838 sizeof(struct napi_struct), GFP_KERNEL);
839 if (!adapter->napi)
840 return -ENOMEM;
841
842 for (i = 0; i < adapter->req_rx_queues; i++) {
843 netdev_dbg(netdev, "Adding napi[%d]\n", i);
844 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
845 NAPI_POLL_WEIGHT);
846 }
847
848 send_map_query(adapter);
849
850 rc = init_rx_pools(netdev);
851 if (rc)
852 return rc;
853
854 rc = init_tx_pools(netdev);
855 return rc;
856 }
857
__ibmvnic_open(struct net_device * netdev)858 static int __ibmvnic_open(struct net_device *netdev)
859 {
860 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
861 enum vnic_state prev_state = adapter->state;
862 int i, rc;
863
864 adapter->state = VNIC_OPENING;
865 replenish_pools(adapter);
866 ibmvnic_napi_enable(adapter);
867
868 /* We're ready to receive frames, enable the sub-crq interrupts and
869 * set the logical link state to up
870 */
871 for (i = 0; i < adapter->req_rx_queues; i++) {
872 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
873 if (prev_state == VNIC_CLOSED)
874 enable_irq(adapter->rx_scrq[i]->irq);
875 else
876 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
877 }
878
879 for (i = 0; i < adapter->req_tx_queues; i++) {
880 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
881 if (prev_state == VNIC_CLOSED)
882 enable_irq(adapter->tx_scrq[i]->irq);
883 else
884 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
885 }
886
887 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
888 if (rc) {
889 for (i = 0; i < adapter->req_rx_queues; i++)
890 napi_disable(&adapter->napi[i]);
891 release_resources(adapter);
892 return rc;
893 }
894
895 netif_tx_start_all_queues(netdev);
896
897 if (prev_state == VNIC_CLOSED) {
898 for (i = 0; i < adapter->req_rx_queues; i++)
899 napi_schedule(&adapter->napi[i]);
900 }
901
902 adapter->state = VNIC_OPEN;
903 return rc;
904 }
905
ibmvnic_open(struct net_device * netdev)906 static int ibmvnic_open(struct net_device *netdev)
907 {
908 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
909 int rc;
910
911 mutex_lock(&adapter->reset_lock);
912
913 if (adapter->state != VNIC_CLOSED) {
914 rc = ibmvnic_login(netdev);
915 if (rc) {
916 mutex_unlock(&adapter->reset_lock);
917 return rc;
918 }
919
920 rc = init_resources(adapter);
921 if (rc) {
922 netdev_err(netdev, "failed to initialize resources\n");
923 release_resources(adapter);
924 mutex_unlock(&adapter->reset_lock);
925 return rc;
926 }
927 }
928
929 rc = __ibmvnic_open(netdev);
930 netif_carrier_on(netdev);
931 mutex_unlock(&adapter->reset_lock);
932
933 return rc;
934 }
935
clean_rx_pools(struct ibmvnic_adapter * adapter)936 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
937 {
938 struct ibmvnic_rx_pool *rx_pool;
939 u64 rx_entries;
940 int rx_scrqs;
941 int i, j;
942
943 if (!adapter->rx_pool)
944 return;
945
946 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
947 rx_entries = adapter->req_rx_add_entries_per_subcrq;
948
949 /* Free any remaining skbs in the rx buffer pools */
950 for (i = 0; i < rx_scrqs; i++) {
951 rx_pool = &adapter->rx_pool[i];
952 if (!rx_pool)
953 continue;
954
955 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
956 for (j = 0; j < rx_entries; j++) {
957 if (rx_pool->rx_buff[j].skb) {
958 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
959 rx_pool->rx_buff[j].skb = NULL;
960 }
961 }
962 }
963 }
964
clean_tx_pools(struct ibmvnic_adapter * adapter)965 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
966 {
967 struct ibmvnic_tx_pool *tx_pool;
968 u64 tx_entries;
969 int tx_scrqs;
970 int i, j;
971
972 if (!adapter->tx_pool)
973 return;
974
975 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
976 tx_entries = adapter->req_tx_entries_per_subcrq;
977
978 /* Free any remaining skbs in the tx buffer pools */
979 for (i = 0; i < tx_scrqs; i++) {
980 tx_pool = &adapter->tx_pool[i];
981 if (!tx_pool)
982 continue;
983
984 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
985 for (j = 0; j < tx_entries; j++) {
986 if (tx_pool->tx_buff[j].skb) {
987 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
988 tx_pool->tx_buff[j].skb = NULL;
989 }
990 }
991 }
992 }
993
__ibmvnic_close(struct net_device * netdev)994 static int __ibmvnic_close(struct net_device *netdev)
995 {
996 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
997 int rc = 0;
998 int i;
999
1000 adapter->state = VNIC_CLOSING;
1001
1002 /* ensure that transmissions are stopped if called by do_reset */
1003 if (adapter->resetting)
1004 netif_tx_disable(netdev);
1005 else
1006 netif_tx_stop_all_queues(netdev);
1007
1008 ibmvnic_napi_disable(adapter);
1009
1010 if (adapter->tx_scrq) {
1011 for (i = 0; i < adapter->req_tx_queues; i++)
1012 if (adapter->tx_scrq[i]->irq) {
1013 netdev_dbg(adapter->netdev,
1014 "Disabling tx_scrq[%d] irq\n", i);
1015 disable_irq(adapter->tx_scrq[i]->irq);
1016 }
1017 }
1018
1019 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1020 if (rc)
1021 return rc;
1022
1023 if (adapter->rx_scrq) {
1024 for (i = 0; i < adapter->req_rx_queues; i++) {
1025 int retries = 10;
1026
1027 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1028 retries--;
1029 mdelay(100);
1030
1031 if (retries == 0)
1032 break;
1033 }
1034
1035 if (adapter->rx_scrq[i]->irq) {
1036 netdev_dbg(adapter->netdev,
1037 "Disabling rx_scrq[%d] irq\n", i);
1038 disable_irq(adapter->rx_scrq[i]->irq);
1039 }
1040 }
1041 }
1042 clean_rx_pools(adapter);
1043 clean_tx_pools(adapter);
1044 adapter->state = VNIC_CLOSED;
1045 return rc;
1046 }
1047
ibmvnic_close(struct net_device * netdev)1048 static int ibmvnic_close(struct net_device *netdev)
1049 {
1050 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1051 int rc;
1052
1053 mutex_lock(&adapter->reset_lock);
1054 rc = __ibmvnic_close(netdev);
1055 mutex_unlock(&adapter->reset_lock);
1056
1057 return rc;
1058 }
1059
1060 /**
1061 * build_hdr_data - creates L2/L3/L4 header data buffer
1062 * @hdr_field - bitfield determining needed headers
1063 * @skb - socket buffer
1064 * @hdr_len - array of header lengths
1065 * @tot_len - total length of data
1066 *
1067 * Reads hdr_field to determine which headers are needed by firmware.
1068 * Builds a buffer containing these headers. Saves individual header
1069 * lengths and total buffer length to be used to build descriptors.
1070 */
build_hdr_data(u8 hdr_field,struct sk_buff * skb,int * hdr_len,u8 * hdr_data)1071 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1072 int *hdr_len, u8 *hdr_data)
1073 {
1074 int len = 0;
1075 u8 *hdr;
1076
1077 hdr_len[0] = sizeof(struct ethhdr);
1078
1079 if (skb->protocol == htons(ETH_P_IP)) {
1080 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1081 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1082 hdr_len[2] = tcp_hdrlen(skb);
1083 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1084 hdr_len[2] = sizeof(struct udphdr);
1085 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1086 hdr_len[1] = sizeof(struct ipv6hdr);
1087 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1088 hdr_len[2] = tcp_hdrlen(skb);
1089 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1090 hdr_len[2] = sizeof(struct udphdr);
1091 }
1092
1093 memset(hdr_data, 0, 120);
1094 if ((hdr_field >> 6) & 1) {
1095 hdr = skb_mac_header(skb);
1096 memcpy(hdr_data, hdr, hdr_len[0]);
1097 len += hdr_len[0];
1098 }
1099
1100 if ((hdr_field >> 5) & 1) {
1101 hdr = skb_network_header(skb);
1102 memcpy(hdr_data + len, hdr, hdr_len[1]);
1103 len += hdr_len[1];
1104 }
1105
1106 if ((hdr_field >> 4) & 1) {
1107 hdr = skb_transport_header(skb);
1108 memcpy(hdr_data + len, hdr, hdr_len[2]);
1109 len += hdr_len[2];
1110 }
1111 return len;
1112 }
1113
1114 /**
1115 * create_hdr_descs - create header and header extension descriptors
1116 * @hdr_field - bitfield determining needed headers
1117 * @data - buffer containing header data
1118 * @len - length of data buffer
1119 * @hdr_len - array of individual header lengths
1120 * @scrq_arr - descriptor array
1121 *
1122 * Creates header and, if needed, header extension descriptors and
1123 * places them in a descriptor array, scrq_arr
1124 */
1125
create_hdr_descs(u8 hdr_field,u8 * hdr_data,int len,int * hdr_len,union sub_crq * scrq_arr)1126 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1127 union sub_crq *scrq_arr)
1128 {
1129 union sub_crq hdr_desc;
1130 int tmp_len = len;
1131 int num_descs = 0;
1132 u8 *data, *cur;
1133 int tmp;
1134
1135 while (tmp_len > 0) {
1136 cur = hdr_data + len - tmp_len;
1137
1138 memset(&hdr_desc, 0, sizeof(hdr_desc));
1139 if (cur != hdr_data) {
1140 data = hdr_desc.hdr_ext.data;
1141 tmp = tmp_len > 29 ? 29 : tmp_len;
1142 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1143 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1144 hdr_desc.hdr_ext.len = tmp;
1145 } else {
1146 data = hdr_desc.hdr.data;
1147 tmp = tmp_len > 24 ? 24 : tmp_len;
1148 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1149 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1150 hdr_desc.hdr.len = tmp;
1151 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1152 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1153 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1154 hdr_desc.hdr.flag = hdr_field << 1;
1155 }
1156 memcpy(data, cur, tmp);
1157 tmp_len -= tmp;
1158 *scrq_arr = hdr_desc;
1159 scrq_arr++;
1160 num_descs++;
1161 }
1162
1163 return num_descs;
1164 }
1165
1166 /**
1167 * build_hdr_descs_arr - build a header descriptor array
1168 * @skb - socket buffer
1169 * @num_entries - number of descriptors to be sent
1170 * @subcrq - first TX descriptor
1171 * @hdr_field - bit field determining which headers will be sent
1172 *
1173 * This function will build a TX descriptor array with applicable
1174 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1175 */
1176
build_hdr_descs_arr(struct ibmvnic_tx_buff * txbuff,int * num_entries,u8 hdr_field)1177 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1178 int *num_entries, u8 hdr_field)
1179 {
1180 int hdr_len[3] = {0, 0, 0};
1181 int tot_len;
1182 u8 *hdr_data = txbuff->hdr_data;
1183
1184 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1185 txbuff->hdr_data);
1186 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1187 txbuff->indir_arr + 1);
1188 }
1189
ibmvnic_xmit(struct sk_buff * skb,struct net_device * netdev)1190 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1191 {
1192 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1193 int queue_num = skb_get_queue_mapping(skb);
1194 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1195 struct device *dev = &adapter->vdev->dev;
1196 struct ibmvnic_tx_buff *tx_buff = NULL;
1197 struct ibmvnic_sub_crq_queue *tx_scrq;
1198 struct ibmvnic_tx_pool *tx_pool;
1199 unsigned int tx_send_failed = 0;
1200 unsigned int tx_map_failed = 0;
1201 unsigned int tx_dropped = 0;
1202 unsigned int tx_packets = 0;
1203 unsigned int tx_bytes = 0;
1204 dma_addr_t data_dma_addr;
1205 struct netdev_queue *txq;
1206 unsigned long lpar_rc;
1207 union sub_crq tx_crq;
1208 unsigned int offset;
1209 int num_entries = 1;
1210 unsigned char *dst;
1211 u64 *handle_array;
1212 int index = 0;
1213 int ret = 0;
1214
1215 if (adapter->resetting) {
1216 if (!netif_subqueue_stopped(netdev, skb))
1217 netif_stop_subqueue(netdev, queue_num);
1218 dev_kfree_skb_any(skb);
1219
1220 tx_send_failed++;
1221 tx_dropped++;
1222 ret = NETDEV_TX_OK;
1223 goto out;
1224 }
1225
1226 tx_pool = &adapter->tx_pool[queue_num];
1227 tx_scrq = adapter->tx_scrq[queue_num];
1228 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1229 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1230 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1231
1232 index = tx_pool->free_map[tx_pool->consumer_index];
1233 offset = index * adapter->req_mtu;
1234 dst = tx_pool->long_term_buff.buff + offset;
1235 memset(dst, 0, adapter->req_mtu);
1236 skb_copy_from_linear_data(skb, dst, skb->len);
1237 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1238
1239 tx_pool->consumer_index =
1240 (tx_pool->consumer_index + 1) %
1241 adapter->req_tx_entries_per_subcrq;
1242
1243 tx_buff = &tx_pool->tx_buff[index];
1244 tx_buff->skb = skb;
1245 tx_buff->data_dma[0] = data_dma_addr;
1246 tx_buff->data_len[0] = skb->len;
1247 tx_buff->index = index;
1248 tx_buff->pool_index = queue_num;
1249 tx_buff->last_frag = true;
1250
1251 memset(&tx_crq, 0, sizeof(tx_crq));
1252 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1253 tx_crq.v1.type = IBMVNIC_TX_DESC;
1254 tx_crq.v1.n_crq_elem = 1;
1255 tx_crq.v1.n_sge = 1;
1256 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1257 tx_crq.v1.correlator = cpu_to_be32(index);
1258 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1259 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1260 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1261
1262 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1263 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1264 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1265 }
1266
1267 if (skb->protocol == htons(ETH_P_IP)) {
1268 if (ip_hdr(skb)->version == 4)
1269 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1270 else if (ip_hdr(skb)->version == 6)
1271 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1272
1273 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1274 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1275 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1276 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1277 }
1278
1279 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1280 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1281 hdrs += 2;
1282 }
1283 /* determine if l2/3/4 headers are sent to firmware */
1284 if ((*hdrs >> 7) & 1 &&
1285 (skb->protocol == htons(ETH_P_IP) ||
1286 skb->protocol == htons(ETH_P_IPV6))) {
1287 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1288 tx_crq.v1.n_crq_elem = num_entries;
1289 tx_buff->indir_arr[0] = tx_crq;
1290 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1291 sizeof(tx_buff->indir_arr),
1292 DMA_TO_DEVICE);
1293 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1294 dev_kfree_skb_any(skb);
1295 tx_buff->skb = NULL;
1296 if (!firmware_has_feature(FW_FEATURE_CMO))
1297 dev_err(dev, "tx: unable to map descriptor array\n");
1298 tx_map_failed++;
1299 tx_dropped++;
1300 ret = NETDEV_TX_OK;
1301 goto out;
1302 }
1303 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1304 (u64)tx_buff->indir_dma,
1305 (u64)num_entries);
1306 } else {
1307 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1308 &tx_crq);
1309 }
1310 if (lpar_rc != H_SUCCESS) {
1311 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1312
1313 if (tx_pool->consumer_index == 0)
1314 tx_pool->consumer_index =
1315 adapter->req_tx_entries_per_subcrq - 1;
1316 else
1317 tx_pool->consumer_index--;
1318
1319 dev_kfree_skb_any(skb);
1320 tx_buff->skb = NULL;
1321
1322 if (lpar_rc == H_CLOSED) {
1323 /* Disable TX and report carrier off if queue is closed.
1324 * Firmware guarantees that a signal will be sent to the
1325 * driver, triggering a reset or some other action.
1326 */
1327 netif_tx_stop_all_queues(netdev);
1328 netif_carrier_off(netdev);
1329 }
1330
1331 tx_send_failed++;
1332 tx_dropped++;
1333 ret = NETDEV_TX_OK;
1334 goto out;
1335 }
1336
1337 if (atomic_inc_return(&tx_scrq->used)
1338 >= adapter->req_tx_entries_per_subcrq) {
1339 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1340 netif_stop_subqueue(netdev, queue_num);
1341 }
1342
1343 tx_packets++;
1344 tx_bytes += skb->len;
1345 txq->trans_start = jiffies;
1346 ret = NETDEV_TX_OK;
1347
1348 out:
1349 netdev->stats.tx_dropped += tx_dropped;
1350 netdev->stats.tx_bytes += tx_bytes;
1351 netdev->stats.tx_packets += tx_packets;
1352 adapter->tx_send_failed += tx_send_failed;
1353 adapter->tx_map_failed += tx_map_failed;
1354 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1355 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1356 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1357
1358 return ret;
1359 }
1360
ibmvnic_set_multi(struct net_device * netdev)1361 static void ibmvnic_set_multi(struct net_device *netdev)
1362 {
1363 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1364 struct netdev_hw_addr *ha;
1365 union ibmvnic_crq crq;
1366
1367 memset(&crq, 0, sizeof(crq));
1368 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1369 crq.request_capability.cmd = REQUEST_CAPABILITY;
1370
1371 if (netdev->flags & IFF_PROMISC) {
1372 if (!adapter->promisc_supported)
1373 return;
1374 } else {
1375 if (netdev->flags & IFF_ALLMULTI) {
1376 /* Accept all multicast */
1377 memset(&crq, 0, sizeof(crq));
1378 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1379 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1380 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1381 ibmvnic_send_crq(adapter, &crq);
1382 } else if (netdev_mc_empty(netdev)) {
1383 /* Reject all multicast */
1384 memset(&crq, 0, sizeof(crq));
1385 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1386 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1387 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1388 ibmvnic_send_crq(adapter, &crq);
1389 } else {
1390 /* Accept one or more multicast(s) */
1391 netdev_for_each_mc_addr(ha, netdev) {
1392 memset(&crq, 0, sizeof(crq));
1393 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1394 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1395 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1396 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1397 ha->addr);
1398 ibmvnic_send_crq(adapter, &crq);
1399 }
1400 }
1401 }
1402 }
1403
ibmvnic_set_mac(struct net_device * netdev,void * p)1404 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1405 {
1406 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1407 struct sockaddr *addr = p;
1408 union ibmvnic_crq crq;
1409
1410 if (!is_valid_ether_addr(addr->sa_data))
1411 return -EADDRNOTAVAIL;
1412
1413 memset(&crq, 0, sizeof(crq));
1414 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1415 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1416 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1417 ibmvnic_send_crq(adapter, &crq);
1418 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1419 return 0;
1420 }
1421
1422 /**
1423 * do_reset returns zero if we are able to keep processing reset events, or
1424 * non-zero if we hit a fatal error and must halt.
1425 */
do_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)1426 static int do_reset(struct ibmvnic_adapter *adapter,
1427 struct ibmvnic_rwi *rwi, u32 reset_state)
1428 {
1429 struct net_device *netdev = adapter->netdev;
1430 int i, rc;
1431
1432 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1433 rwi->reset_reason);
1434
1435 netif_carrier_off(netdev);
1436 adapter->reset_reason = rwi->reset_reason;
1437
1438 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1439 rc = ibmvnic_reenable_crq_queue(adapter);
1440 if (rc)
1441 return 0;
1442 }
1443
1444 rc = __ibmvnic_close(netdev);
1445 if (rc)
1446 return rc;
1447
1448 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1449 /* remove the closed state so when we call open it appears
1450 * we are coming from the probed state.
1451 */
1452 adapter->state = VNIC_PROBED;
1453
1454 rc = ibmvnic_init(adapter);
1455 if (rc)
1456 return 0;
1457
1458 /* If the adapter was in PROBE state prior to the reset,
1459 * exit here.
1460 */
1461 if (reset_state == VNIC_PROBED)
1462 return 0;
1463
1464 rc = ibmvnic_login(netdev);
1465 if (rc) {
1466 adapter->state = reset_state;
1467 return rc;
1468 }
1469
1470 rc = reset_tx_pools(adapter);
1471 if (rc)
1472 return rc;
1473
1474 rc = reset_rx_pools(adapter);
1475 if (rc)
1476 return rc;
1477
1478 if (reset_state == VNIC_CLOSED)
1479 return 0;
1480 }
1481
1482 rc = __ibmvnic_open(netdev);
1483 if (rc) {
1484 if (list_empty(&adapter->rwi_list))
1485 adapter->state = VNIC_CLOSED;
1486 else
1487 adapter->state = reset_state;
1488
1489 return 0;
1490 }
1491
1492 /* refresh device's multicast list */
1493 ibmvnic_set_multi(netdev);
1494
1495 /* kick napi */
1496 for (i = 0; i < adapter->req_rx_queues; i++)
1497 napi_schedule(&adapter->napi[i]);
1498
1499 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1500 netdev_notify_peers(netdev);
1501
1502 netif_carrier_on(netdev);
1503
1504 return 0;
1505 }
1506
get_next_rwi(struct ibmvnic_adapter * adapter)1507 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1508 {
1509 struct ibmvnic_rwi *rwi;
1510
1511 mutex_lock(&adapter->rwi_lock);
1512
1513 if (!list_empty(&adapter->rwi_list)) {
1514 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1515 list);
1516 list_del(&rwi->list);
1517 } else {
1518 rwi = NULL;
1519 }
1520
1521 mutex_unlock(&adapter->rwi_lock);
1522 return rwi;
1523 }
1524
free_all_rwi(struct ibmvnic_adapter * adapter)1525 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1526 {
1527 struct ibmvnic_rwi *rwi;
1528
1529 rwi = get_next_rwi(adapter);
1530 while (rwi) {
1531 kfree(rwi);
1532 rwi = get_next_rwi(adapter);
1533 }
1534 }
1535
__ibmvnic_reset(struct work_struct * work)1536 static void __ibmvnic_reset(struct work_struct *work)
1537 {
1538 struct ibmvnic_rwi *rwi;
1539 struct ibmvnic_adapter *adapter;
1540 struct net_device *netdev;
1541 u32 reset_state;
1542 int rc;
1543
1544 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1545 netdev = adapter->netdev;
1546
1547 mutex_lock(&adapter->reset_lock);
1548 adapter->resetting = true;
1549 reset_state = adapter->state;
1550
1551 rwi = get_next_rwi(adapter);
1552 while (rwi) {
1553 rc = do_reset(adapter, rwi, reset_state);
1554 kfree(rwi);
1555 if (rc)
1556 break;
1557
1558 rwi = get_next_rwi(adapter);
1559 }
1560
1561 if (rc) {
1562 netdev_dbg(adapter->netdev, "Reset failed\n");
1563 free_all_rwi(adapter);
1564 mutex_unlock(&adapter->reset_lock);
1565 return;
1566 }
1567
1568 adapter->resetting = false;
1569 mutex_unlock(&adapter->reset_lock);
1570 }
1571
ibmvnic_reset(struct ibmvnic_adapter * adapter,enum ibmvnic_reset_reason reason)1572 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1573 enum ibmvnic_reset_reason reason)
1574 {
1575 struct ibmvnic_rwi *rwi, *tmp;
1576 struct net_device *netdev = adapter->netdev;
1577 struct list_head *entry;
1578
1579 if (adapter->state == VNIC_REMOVING ||
1580 adapter->state == VNIC_REMOVED) {
1581 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1582 return;
1583 }
1584
1585 if (adapter->state == VNIC_PROBING) {
1586 netdev_warn(netdev, "Adapter reset during probe\n");
1587 adapter->init_done_rc = EAGAIN;
1588 return;
1589 }
1590
1591 mutex_lock(&adapter->rwi_lock);
1592
1593 list_for_each(entry, &adapter->rwi_list) {
1594 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1595 if (tmp->reset_reason == reason) {
1596 netdev_dbg(netdev, "Skipping matching reset\n");
1597 mutex_unlock(&adapter->rwi_lock);
1598 return;
1599 }
1600 }
1601
1602 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
1603 if (!rwi) {
1604 mutex_unlock(&adapter->rwi_lock);
1605 ibmvnic_close(netdev);
1606 return;
1607 }
1608
1609 rwi->reset_reason = reason;
1610 list_add_tail(&rwi->list, &adapter->rwi_list);
1611 mutex_unlock(&adapter->rwi_lock);
1612
1613 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1614 schedule_work(&adapter->ibmvnic_reset);
1615 }
1616
ibmvnic_tx_timeout(struct net_device * dev)1617 static void ibmvnic_tx_timeout(struct net_device *dev)
1618 {
1619 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1620
1621 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1622 }
1623
remove_buff_from_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_buff * rx_buff)1624 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1625 struct ibmvnic_rx_buff *rx_buff)
1626 {
1627 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1628
1629 rx_buff->skb = NULL;
1630
1631 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1632 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1633
1634 atomic_dec(&pool->available);
1635 }
1636
ibmvnic_poll(struct napi_struct * napi,int budget)1637 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1638 {
1639 struct net_device *netdev = napi->dev;
1640 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1641 int scrq_num = (int)(napi - adapter->napi);
1642 int frames_processed = 0;
1643
1644 restart_poll:
1645 while (frames_processed < budget) {
1646 struct sk_buff *skb;
1647 struct ibmvnic_rx_buff *rx_buff;
1648 union sub_crq *next;
1649 u32 length;
1650 u16 offset;
1651 u8 flags = 0;
1652
1653 if (unlikely(adapter->resetting)) {
1654 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1655 napi_complete_done(napi, frames_processed);
1656 return frames_processed;
1657 }
1658
1659 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1660 break;
1661 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1662 rx_buff =
1663 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1664 rx_comp.correlator);
1665 /* do error checking */
1666 if (next->rx_comp.rc) {
1667 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1668 be16_to_cpu(next->rx_comp.rc));
1669 /* free the entry */
1670 next->rx_comp.first = 0;
1671 dev_kfree_skb_any(rx_buff->skb);
1672 remove_buff_from_pool(adapter, rx_buff);
1673 continue;
1674 } else if (!rx_buff->skb) {
1675 /* free the entry */
1676 next->rx_comp.first = 0;
1677 remove_buff_from_pool(adapter, rx_buff);
1678 continue;
1679 }
1680
1681 length = be32_to_cpu(next->rx_comp.len);
1682 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1683 flags = next->rx_comp.flags;
1684 skb = rx_buff->skb;
1685 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1686 length);
1687
1688 /* VLAN Header has been stripped by the system firmware and
1689 * needs to be inserted by the driver
1690 */
1691 if (adapter->rx_vlan_header_insertion &&
1692 (flags & IBMVNIC_VLAN_STRIPPED))
1693 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1694 ntohs(next->rx_comp.vlan_tci));
1695
1696 /* free the entry */
1697 next->rx_comp.first = 0;
1698 remove_buff_from_pool(adapter, rx_buff);
1699
1700 skb_put(skb, length);
1701 skb->protocol = eth_type_trans(skb, netdev);
1702 skb_record_rx_queue(skb, scrq_num);
1703
1704 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1705 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1706 skb->ip_summed = CHECKSUM_UNNECESSARY;
1707 }
1708
1709 length = skb->len;
1710 napi_gro_receive(napi, skb); /* send it up */
1711 netdev->stats.rx_packets++;
1712 netdev->stats.rx_bytes += length;
1713 adapter->rx_stats_buffers[scrq_num].packets++;
1714 adapter->rx_stats_buffers[scrq_num].bytes += length;
1715 frames_processed++;
1716 }
1717
1718 if (adapter->state != VNIC_CLOSING)
1719 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1720
1721 if (frames_processed < budget) {
1722 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1723 napi_complete_done(napi, frames_processed);
1724 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1725 napi_reschedule(napi)) {
1726 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1727 goto restart_poll;
1728 }
1729 }
1730 return frames_processed;
1731 }
1732
1733 #ifdef CONFIG_NET_POLL_CONTROLLER
ibmvnic_netpoll_controller(struct net_device * dev)1734 static void ibmvnic_netpoll_controller(struct net_device *dev)
1735 {
1736 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1737 int i;
1738
1739 replenish_pools(netdev_priv(dev));
1740 for (i = 0; i < adapter->req_rx_queues; i++)
1741 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1742 adapter->rx_scrq[i]);
1743 }
1744 #endif
1745
ibmvnic_change_mtu(struct net_device * netdev,int new_mtu)1746 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1747 {
1748 return -EOPNOTSUPP;
1749 }
1750
1751 static const struct net_device_ops ibmvnic_netdev_ops = {
1752 .ndo_open = ibmvnic_open,
1753 .ndo_stop = ibmvnic_close,
1754 .ndo_start_xmit = ibmvnic_xmit,
1755 .ndo_set_rx_mode = ibmvnic_set_multi,
1756 .ndo_set_mac_address = ibmvnic_set_mac,
1757 .ndo_validate_addr = eth_validate_addr,
1758 .ndo_tx_timeout = ibmvnic_tx_timeout,
1759 #ifdef CONFIG_NET_POLL_CONTROLLER
1760 .ndo_poll_controller = ibmvnic_netpoll_controller,
1761 #endif
1762 .ndo_change_mtu = ibmvnic_change_mtu,
1763 };
1764
1765 /* ethtool functions */
1766
ibmvnic_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)1767 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1768 struct ethtool_link_ksettings *cmd)
1769 {
1770 u32 supported, advertising;
1771
1772 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1773 SUPPORTED_FIBRE);
1774 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1775 ADVERTISED_FIBRE);
1776 cmd->base.speed = SPEED_1000;
1777 cmd->base.duplex = DUPLEX_FULL;
1778 cmd->base.port = PORT_FIBRE;
1779 cmd->base.phy_address = 0;
1780 cmd->base.autoneg = AUTONEG_ENABLE;
1781
1782 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1783 supported);
1784 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1785 advertising);
1786
1787 return 0;
1788 }
1789
ibmvnic_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1790 static void ibmvnic_get_drvinfo(struct net_device *dev,
1791 struct ethtool_drvinfo *info)
1792 {
1793 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1794 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1795 }
1796
ibmvnic_get_msglevel(struct net_device * netdev)1797 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1798 {
1799 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1800
1801 return adapter->msg_enable;
1802 }
1803
ibmvnic_set_msglevel(struct net_device * netdev,u32 data)1804 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1805 {
1806 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1807
1808 adapter->msg_enable = data;
1809 }
1810
ibmvnic_get_link(struct net_device * netdev)1811 static u32 ibmvnic_get_link(struct net_device *netdev)
1812 {
1813 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1814
1815 /* Don't need to send a query because we request a logical link up at
1816 * init and then we wait for link state indications
1817 */
1818 return adapter->logical_link_state;
1819 }
1820
ibmvnic_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)1821 static void ibmvnic_get_ringparam(struct net_device *netdev,
1822 struct ethtool_ringparam *ring)
1823 {
1824 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1825
1826 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
1827 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
1828 ring->rx_mini_max_pending = 0;
1829 ring->rx_jumbo_max_pending = 0;
1830 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
1831 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
1832 ring->rx_mini_pending = 0;
1833 ring->rx_jumbo_pending = 0;
1834 }
1835
ibmvnic_get_channels(struct net_device * netdev,struct ethtool_channels * channels)1836 static void ibmvnic_get_channels(struct net_device *netdev,
1837 struct ethtool_channels *channels)
1838 {
1839 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1840
1841 channels->max_rx = adapter->max_rx_queues;
1842 channels->max_tx = adapter->max_tx_queues;
1843 channels->max_other = 0;
1844 channels->max_combined = 0;
1845 channels->rx_count = adapter->req_rx_queues;
1846 channels->tx_count = adapter->req_tx_queues;
1847 channels->other_count = 0;
1848 channels->combined_count = 0;
1849 }
1850
ibmvnic_get_strings(struct net_device * dev,u32 stringset,u8 * data)1851 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1852 {
1853 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1854 int i;
1855
1856 if (stringset != ETH_SS_STATS)
1857 return;
1858
1859 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1860 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1861
1862 for (i = 0; i < adapter->req_tx_queues; i++) {
1863 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
1864 data += ETH_GSTRING_LEN;
1865
1866 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
1867 data += ETH_GSTRING_LEN;
1868
1869 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
1870 data += ETH_GSTRING_LEN;
1871 }
1872
1873 for (i = 0; i < adapter->req_rx_queues; i++) {
1874 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
1875 data += ETH_GSTRING_LEN;
1876
1877 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
1878 data += ETH_GSTRING_LEN;
1879
1880 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
1881 data += ETH_GSTRING_LEN;
1882 }
1883 }
1884
ibmvnic_get_sset_count(struct net_device * dev,int sset)1885 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1886 {
1887 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1888
1889 switch (sset) {
1890 case ETH_SS_STATS:
1891 return ARRAY_SIZE(ibmvnic_stats) +
1892 adapter->req_tx_queues * NUM_TX_STATS +
1893 adapter->req_rx_queues * NUM_RX_STATS;
1894 default:
1895 return -EOPNOTSUPP;
1896 }
1897 }
1898
ibmvnic_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)1899 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1900 struct ethtool_stats *stats, u64 *data)
1901 {
1902 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1903 union ibmvnic_crq crq;
1904 int i, j;
1905
1906 memset(&crq, 0, sizeof(crq));
1907 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1908 crq.request_statistics.cmd = REQUEST_STATISTICS;
1909 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1910 crq.request_statistics.len =
1911 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1912
1913 /* Wait for data to be written */
1914 init_completion(&adapter->stats_done);
1915 ibmvnic_send_crq(adapter, &crq);
1916 wait_for_completion(&adapter->stats_done);
1917
1918 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1919 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
1920 ibmvnic_stats[i].offset));
1921
1922 for (j = 0; j < adapter->req_tx_queues; j++) {
1923 data[i] = adapter->tx_stats_buffers[j].packets;
1924 i++;
1925 data[i] = adapter->tx_stats_buffers[j].bytes;
1926 i++;
1927 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
1928 i++;
1929 }
1930
1931 for (j = 0; j < adapter->req_rx_queues; j++) {
1932 data[i] = adapter->rx_stats_buffers[j].packets;
1933 i++;
1934 data[i] = adapter->rx_stats_buffers[j].bytes;
1935 i++;
1936 data[i] = adapter->rx_stats_buffers[j].interrupts;
1937 i++;
1938 }
1939 }
1940
1941 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1942 .get_drvinfo = ibmvnic_get_drvinfo,
1943 .get_msglevel = ibmvnic_get_msglevel,
1944 .set_msglevel = ibmvnic_set_msglevel,
1945 .get_link = ibmvnic_get_link,
1946 .get_ringparam = ibmvnic_get_ringparam,
1947 .get_channels = ibmvnic_get_channels,
1948 .get_strings = ibmvnic_get_strings,
1949 .get_sset_count = ibmvnic_get_sset_count,
1950 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1951 .get_link_ksettings = ibmvnic_get_link_ksettings,
1952 };
1953
1954 /* Routines for managing CRQs/sCRQs */
1955
reset_one_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)1956 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1957 struct ibmvnic_sub_crq_queue *scrq)
1958 {
1959 int rc;
1960
1961 if (scrq->irq) {
1962 free_irq(scrq->irq, scrq);
1963 irq_dispose_mapping(scrq->irq);
1964 scrq->irq = 0;
1965 }
1966
1967 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1968 atomic_set(&scrq->used, 0);
1969 scrq->cur = 0;
1970
1971 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1972 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1973 return rc;
1974 }
1975
reset_sub_crq_queues(struct ibmvnic_adapter * adapter)1976 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1977 {
1978 int i, rc;
1979
1980 for (i = 0; i < adapter->req_tx_queues; i++) {
1981 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
1982 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1983 if (rc)
1984 return rc;
1985 }
1986
1987 for (i = 0; i < adapter->req_rx_queues; i++) {
1988 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
1989 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1990 if (rc)
1991 return rc;
1992 }
1993
1994 return rc;
1995 }
1996
release_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)1997 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1998 struct ibmvnic_sub_crq_queue *scrq)
1999 {
2000 struct device *dev = &adapter->vdev->dev;
2001 long rc;
2002
2003 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2004
2005 /* Close the sub-crqs */
2006 do {
2007 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2008 adapter->vdev->unit_address,
2009 scrq->crq_num);
2010 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2011
2012 if (rc) {
2013 netdev_err(adapter->netdev,
2014 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2015 scrq->crq_num, rc);
2016 }
2017
2018 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2019 DMA_BIDIRECTIONAL);
2020 free_pages((unsigned long)scrq->msgs, 2);
2021 kfree(scrq);
2022 }
2023
init_sub_crq_queue(struct ibmvnic_adapter * adapter)2024 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2025 *adapter)
2026 {
2027 struct device *dev = &adapter->vdev->dev;
2028 struct ibmvnic_sub_crq_queue *scrq;
2029 int rc;
2030
2031 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2032 if (!scrq)
2033 return NULL;
2034
2035 scrq->msgs =
2036 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2037 if (!scrq->msgs) {
2038 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2039 goto zero_page_failed;
2040 }
2041
2042 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2043 DMA_BIDIRECTIONAL);
2044 if (dma_mapping_error(dev, scrq->msg_token)) {
2045 dev_warn(dev, "Couldn't map crq queue messages page\n");
2046 goto map_failed;
2047 }
2048
2049 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2050 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2051
2052 if (rc == H_RESOURCE)
2053 rc = ibmvnic_reset_crq(adapter);
2054
2055 if (rc == H_CLOSED) {
2056 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2057 } else if (rc) {
2058 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2059 goto reg_failed;
2060 }
2061
2062 scrq->adapter = adapter;
2063 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2064 spin_lock_init(&scrq->lock);
2065
2066 netdev_dbg(adapter->netdev,
2067 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2068 scrq->crq_num, scrq->hw_irq, scrq->irq);
2069
2070 return scrq;
2071
2072 reg_failed:
2073 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2074 DMA_BIDIRECTIONAL);
2075 map_failed:
2076 free_pages((unsigned long)scrq->msgs, 2);
2077 zero_page_failed:
2078 kfree(scrq);
2079
2080 return NULL;
2081 }
2082
release_sub_crqs(struct ibmvnic_adapter * adapter)2083 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2084 {
2085 int i;
2086
2087 if (adapter->tx_scrq) {
2088 for (i = 0; i < adapter->req_tx_queues; i++) {
2089 if (!adapter->tx_scrq[i])
2090 continue;
2091
2092 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2093 i);
2094 if (adapter->tx_scrq[i]->irq) {
2095 free_irq(adapter->tx_scrq[i]->irq,
2096 adapter->tx_scrq[i]);
2097 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2098 adapter->tx_scrq[i]->irq = 0;
2099 }
2100
2101 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2102 }
2103
2104 kfree(adapter->tx_scrq);
2105 adapter->tx_scrq = NULL;
2106 }
2107
2108 if (adapter->rx_scrq) {
2109 for (i = 0; i < adapter->req_rx_queues; i++) {
2110 if (!adapter->rx_scrq[i])
2111 continue;
2112
2113 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2114 i);
2115 if (adapter->rx_scrq[i]->irq) {
2116 free_irq(adapter->rx_scrq[i]->irq,
2117 adapter->rx_scrq[i]);
2118 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2119 adapter->rx_scrq[i]->irq = 0;
2120 }
2121
2122 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2123 }
2124
2125 kfree(adapter->rx_scrq);
2126 adapter->rx_scrq = NULL;
2127 }
2128 }
2129
disable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2130 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2131 struct ibmvnic_sub_crq_queue *scrq)
2132 {
2133 struct device *dev = &adapter->vdev->dev;
2134 unsigned long rc;
2135
2136 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2137 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2138 if (rc)
2139 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2140 scrq->hw_irq, rc);
2141 return rc;
2142 }
2143
enable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2144 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2145 struct ibmvnic_sub_crq_queue *scrq)
2146 {
2147 struct device *dev = &adapter->vdev->dev;
2148 unsigned long rc;
2149
2150 if (scrq->hw_irq > 0x100000000ULL) {
2151 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2152 return 1;
2153 }
2154
2155 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2156 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2157 if (rc)
2158 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2159 scrq->hw_irq, rc);
2160 return rc;
2161 }
2162
ibmvnic_complete_tx(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2163 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2164 struct ibmvnic_sub_crq_queue *scrq)
2165 {
2166 struct device *dev = &adapter->vdev->dev;
2167 struct ibmvnic_tx_buff *txbuff;
2168 union sub_crq *next;
2169 int index;
2170 int i, j;
2171 u8 first;
2172
2173 restart_loop:
2174 while (pending_scrq(adapter, scrq)) {
2175 unsigned int pool = scrq->pool_index;
2176
2177 next = ibmvnic_next_scrq(adapter, scrq);
2178 for (i = 0; i < next->tx_comp.num_comps; i++) {
2179 if (next->tx_comp.rcs[i]) {
2180 dev_err(dev, "tx error %x\n",
2181 next->tx_comp.rcs[i]);
2182 continue;
2183 }
2184 index = be32_to_cpu(next->tx_comp.correlators[i]);
2185 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2186
2187 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2188 if (!txbuff->data_dma[j])
2189 continue;
2190
2191 txbuff->data_dma[j] = 0;
2192 }
2193 /* if sub_crq was sent indirectly */
2194 first = txbuff->indir_arr[0].generic.first;
2195 if (first == IBMVNIC_CRQ_CMD) {
2196 dma_unmap_single(dev, txbuff->indir_dma,
2197 sizeof(txbuff->indir_arr),
2198 DMA_TO_DEVICE);
2199 }
2200
2201 if (txbuff->last_frag) {
2202 dev_kfree_skb_any(txbuff->skb);
2203 txbuff->skb = NULL;
2204 }
2205
2206 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2207 producer_index] = index;
2208 adapter->tx_pool[pool].producer_index =
2209 (adapter->tx_pool[pool].producer_index + 1) %
2210 adapter->req_tx_entries_per_subcrq;
2211 }
2212 /* remove tx_comp scrq*/
2213 next->tx_comp.first = 0;
2214
2215 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2216 (adapter->req_tx_entries_per_subcrq / 2) &&
2217 __netif_subqueue_stopped(adapter->netdev,
2218 scrq->pool_index)) {
2219 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2220 netdev_info(adapter->netdev, "Started queue %d\n",
2221 scrq->pool_index);
2222 }
2223 }
2224
2225 enable_scrq_irq(adapter, scrq);
2226
2227 if (pending_scrq(adapter, scrq)) {
2228 disable_scrq_irq(adapter, scrq);
2229 goto restart_loop;
2230 }
2231
2232 return 0;
2233 }
2234
ibmvnic_interrupt_tx(int irq,void * instance)2235 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2236 {
2237 struct ibmvnic_sub_crq_queue *scrq = instance;
2238 struct ibmvnic_adapter *adapter = scrq->adapter;
2239
2240 disable_scrq_irq(adapter, scrq);
2241 ibmvnic_complete_tx(adapter, scrq);
2242
2243 return IRQ_HANDLED;
2244 }
2245
ibmvnic_interrupt_rx(int irq,void * instance)2246 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2247 {
2248 struct ibmvnic_sub_crq_queue *scrq = instance;
2249 struct ibmvnic_adapter *adapter = scrq->adapter;
2250
2251 /* When booting a kdump kernel we can hit pending interrupts
2252 * prior to completing driver initialization.
2253 */
2254 if (unlikely(adapter->state != VNIC_OPEN))
2255 return IRQ_NONE;
2256
2257 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2258
2259 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2260 disable_scrq_irq(adapter, scrq);
2261 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2262 }
2263
2264 return IRQ_HANDLED;
2265 }
2266
init_sub_crq_irqs(struct ibmvnic_adapter * adapter)2267 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2268 {
2269 struct device *dev = &adapter->vdev->dev;
2270 struct ibmvnic_sub_crq_queue *scrq;
2271 int i = 0, j = 0;
2272 int rc = 0;
2273
2274 for (i = 0; i < adapter->req_tx_queues; i++) {
2275 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2276 i);
2277 scrq = adapter->tx_scrq[i];
2278 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2279
2280 if (!scrq->irq) {
2281 rc = -EINVAL;
2282 dev_err(dev, "Error mapping irq\n");
2283 goto req_tx_irq_failed;
2284 }
2285
2286 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2287 0, "ibmvnic_tx", scrq);
2288
2289 if (rc) {
2290 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2291 scrq->irq, rc);
2292 irq_dispose_mapping(scrq->irq);
2293 goto req_rx_irq_failed;
2294 }
2295 }
2296
2297 for (i = 0; i < adapter->req_rx_queues; i++) {
2298 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2299 i);
2300 scrq = adapter->rx_scrq[i];
2301 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2302 if (!scrq->irq) {
2303 rc = -EINVAL;
2304 dev_err(dev, "Error mapping irq\n");
2305 goto req_rx_irq_failed;
2306 }
2307 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2308 0, "ibmvnic_rx", scrq);
2309 if (rc) {
2310 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2311 scrq->irq, rc);
2312 irq_dispose_mapping(scrq->irq);
2313 goto req_rx_irq_failed;
2314 }
2315 }
2316 return rc;
2317
2318 req_rx_irq_failed:
2319 for (j = 0; j < i; j++) {
2320 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2321 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2322 }
2323 i = adapter->req_tx_queues;
2324 req_tx_irq_failed:
2325 for (j = 0; j < i; j++) {
2326 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2327 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2328 }
2329 release_sub_crqs(adapter);
2330 return rc;
2331 }
2332
init_sub_crqs(struct ibmvnic_adapter * adapter)2333 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2334 {
2335 struct device *dev = &adapter->vdev->dev;
2336 struct ibmvnic_sub_crq_queue **allqueues;
2337 int registered_queues = 0;
2338 int total_queues;
2339 int more = 0;
2340 int i;
2341
2342 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2343
2344 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2345 if (!allqueues)
2346 return -1;
2347
2348 for (i = 0; i < total_queues; i++) {
2349 allqueues[i] = init_sub_crq_queue(adapter);
2350 if (!allqueues[i]) {
2351 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2352 break;
2353 }
2354 registered_queues++;
2355 }
2356
2357 /* Make sure we were able to register the minimum number of queues */
2358 if (registered_queues <
2359 adapter->min_tx_queues + adapter->min_rx_queues) {
2360 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2361 goto tx_failed;
2362 }
2363
2364 /* Distribute the failed allocated queues*/
2365 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2366 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2367 switch (i % 3) {
2368 case 0:
2369 if (adapter->req_rx_queues > adapter->min_rx_queues)
2370 adapter->req_rx_queues--;
2371 else
2372 more++;
2373 break;
2374 case 1:
2375 if (adapter->req_tx_queues > adapter->min_tx_queues)
2376 adapter->req_tx_queues--;
2377 else
2378 more++;
2379 break;
2380 }
2381 }
2382
2383 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2384 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2385 if (!adapter->tx_scrq)
2386 goto tx_failed;
2387
2388 for (i = 0; i < adapter->req_tx_queues; i++) {
2389 adapter->tx_scrq[i] = allqueues[i];
2390 adapter->tx_scrq[i]->pool_index = i;
2391 }
2392
2393 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2394 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2395 if (!adapter->rx_scrq)
2396 goto rx_failed;
2397
2398 for (i = 0; i < adapter->req_rx_queues; i++) {
2399 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2400 adapter->rx_scrq[i]->scrq_num = i;
2401 }
2402
2403 kfree(allqueues);
2404 return 0;
2405
2406 rx_failed:
2407 kfree(adapter->tx_scrq);
2408 adapter->tx_scrq = NULL;
2409 tx_failed:
2410 for (i = 0; i < registered_queues; i++)
2411 release_sub_crq_queue(adapter, allqueues[i]);
2412 kfree(allqueues);
2413 return -1;
2414 }
2415
ibmvnic_send_req_caps(struct ibmvnic_adapter * adapter,int retry)2416 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2417 {
2418 struct device *dev = &adapter->vdev->dev;
2419 union ibmvnic_crq crq;
2420
2421 if (!retry) {
2422 /* Sub-CRQ entries are 32 byte long */
2423 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2424
2425 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2426 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2427 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2428 return;
2429 }
2430
2431 /* Get the minimum between the queried max and the entries
2432 * that fit in our PAGE_SIZE
2433 */
2434 adapter->req_tx_entries_per_subcrq =
2435 adapter->max_tx_entries_per_subcrq > entries_page ?
2436 entries_page : adapter->max_tx_entries_per_subcrq;
2437 adapter->req_rx_add_entries_per_subcrq =
2438 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2439 entries_page : adapter->max_rx_add_entries_per_subcrq;
2440
2441 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2442 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2443 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2444
2445 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2446 }
2447
2448 memset(&crq, 0, sizeof(crq));
2449 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2450 crq.request_capability.cmd = REQUEST_CAPABILITY;
2451
2452 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2453 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2454 atomic_inc(&adapter->running_cap_crqs);
2455 ibmvnic_send_crq(adapter, &crq);
2456
2457 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2458 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2459 atomic_inc(&adapter->running_cap_crqs);
2460 ibmvnic_send_crq(adapter, &crq);
2461
2462 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2463 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2464 atomic_inc(&adapter->running_cap_crqs);
2465 ibmvnic_send_crq(adapter, &crq);
2466
2467 crq.request_capability.capability =
2468 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2469 crq.request_capability.number =
2470 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2471 atomic_inc(&adapter->running_cap_crqs);
2472 ibmvnic_send_crq(adapter, &crq);
2473
2474 crq.request_capability.capability =
2475 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2476 crq.request_capability.number =
2477 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2478 atomic_inc(&adapter->running_cap_crqs);
2479 ibmvnic_send_crq(adapter, &crq);
2480
2481 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2482 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2483 atomic_inc(&adapter->running_cap_crqs);
2484 ibmvnic_send_crq(adapter, &crq);
2485
2486 if (adapter->netdev->flags & IFF_PROMISC) {
2487 if (adapter->promisc_supported) {
2488 crq.request_capability.capability =
2489 cpu_to_be16(PROMISC_REQUESTED);
2490 crq.request_capability.number = cpu_to_be64(1);
2491 atomic_inc(&adapter->running_cap_crqs);
2492 ibmvnic_send_crq(adapter, &crq);
2493 }
2494 } else {
2495 crq.request_capability.capability =
2496 cpu_to_be16(PROMISC_REQUESTED);
2497 crq.request_capability.number = cpu_to_be64(0);
2498 atomic_inc(&adapter->running_cap_crqs);
2499 ibmvnic_send_crq(adapter, &crq);
2500 }
2501 }
2502
pending_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2503 static int pending_scrq(struct ibmvnic_adapter *adapter,
2504 struct ibmvnic_sub_crq_queue *scrq)
2505 {
2506 union sub_crq *entry = &scrq->msgs[scrq->cur];
2507
2508 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2509 return 1;
2510 else
2511 return 0;
2512 }
2513
ibmvnic_next_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2514 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2515 struct ibmvnic_sub_crq_queue *scrq)
2516 {
2517 union sub_crq *entry;
2518 unsigned long flags;
2519
2520 spin_lock_irqsave(&scrq->lock, flags);
2521 entry = &scrq->msgs[scrq->cur];
2522 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2523 if (++scrq->cur == scrq->size)
2524 scrq->cur = 0;
2525 } else {
2526 entry = NULL;
2527 }
2528 spin_unlock_irqrestore(&scrq->lock, flags);
2529
2530 return entry;
2531 }
2532
ibmvnic_next_crq(struct ibmvnic_adapter * adapter)2533 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2534 {
2535 struct ibmvnic_crq_queue *queue = &adapter->crq;
2536 union ibmvnic_crq *crq;
2537
2538 crq = &queue->msgs[queue->cur];
2539 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2540 if (++queue->cur == queue->size)
2541 queue->cur = 0;
2542 } else {
2543 crq = NULL;
2544 }
2545
2546 return crq;
2547 }
2548
send_subcrq(struct ibmvnic_adapter * adapter,u64 remote_handle,union sub_crq * sub_crq)2549 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2550 union sub_crq *sub_crq)
2551 {
2552 unsigned int ua = adapter->vdev->unit_address;
2553 struct device *dev = &adapter->vdev->dev;
2554 u64 *u64_crq = (u64 *)sub_crq;
2555 int rc;
2556
2557 netdev_dbg(adapter->netdev,
2558 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2559 (unsigned long int)cpu_to_be64(remote_handle),
2560 (unsigned long int)cpu_to_be64(u64_crq[0]),
2561 (unsigned long int)cpu_to_be64(u64_crq[1]),
2562 (unsigned long int)cpu_to_be64(u64_crq[2]),
2563 (unsigned long int)cpu_to_be64(u64_crq[3]));
2564
2565 /* Make sure the hypervisor sees the complete request */
2566 mb();
2567
2568 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2569 cpu_to_be64(remote_handle),
2570 cpu_to_be64(u64_crq[0]),
2571 cpu_to_be64(u64_crq[1]),
2572 cpu_to_be64(u64_crq[2]),
2573 cpu_to_be64(u64_crq[3]));
2574
2575 if (rc) {
2576 if (rc == H_CLOSED)
2577 dev_warn(dev, "CRQ Queue closed\n");
2578 dev_err(dev, "Send error (rc=%d)\n", rc);
2579 }
2580
2581 return rc;
2582 }
2583
send_subcrq_indirect(struct ibmvnic_adapter * adapter,u64 remote_handle,u64 ioba,u64 num_entries)2584 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2585 u64 remote_handle, u64 ioba, u64 num_entries)
2586 {
2587 unsigned int ua = adapter->vdev->unit_address;
2588 struct device *dev = &adapter->vdev->dev;
2589 int rc;
2590
2591 /* Make sure the hypervisor sees the complete request */
2592 mb();
2593 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2594 cpu_to_be64(remote_handle),
2595 ioba, num_entries);
2596
2597 if (rc) {
2598 if (rc == H_CLOSED)
2599 dev_warn(dev, "CRQ Queue closed\n");
2600 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2601 }
2602
2603 return rc;
2604 }
2605
ibmvnic_send_crq(struct ibmvnic_adapter * adapter,union ibmvnic_crq * crq)2606 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2607 union ibmvnic_crq *crq)
2608 {
2609 unsigned int ua = adapter->vdev->unit_address;
2610 struct device *dev = &adapter->vdev->dev;
2611 u64 *u64_crq = (u64 *)crq;
2612 int rc;
2613
2614 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2615 (unsigned long int)cpu_to_be64(u64_crq[0]),
2616 (unsigned long int)cpu_to_be64(u64_crq[1]));
2617
2618 /* Make sure the hypervisor sees the complete request */
2619 mb();
2620
2621 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2622 cpu_to_be64(u64_crq[0]),
2623 cpu_to_be64(u64_crq[1]));
2624
2625 if (rc) {
2626 if (rc == H_CLOSED)
2627 dev_warn(dev, "CRQ Queue closed\n");
2628 dev_warn(dev, "Send error (rc=%d)\n", rc);
2629 }
2630
2631 return rc;
2632 }
2633
ibmvnic_send_crq_init(struct ibmvnic_adapter * adapter)2634 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2635 {
2636 union ibmvnic_crq crq;
2637
2638 memset(&crq, 0, sizeof(crq));
2639 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2640 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2641 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2642
2643 return ibmvnic_send_crq(adapter, &crq);
2644 }
2645
send_version_xchg(struct ibmvnic_adapter * adapter)2646 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2647 {
2648 union ibmvnic_crq crq;
2649
2650 memset(&crq, 0, sizeof(crq));
2651 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2652 crq.version_exchange.cmd = VERSION_EXCHANGE;
2653 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2654
2655 return ibmvnic_send_crq(adapter, &crq);
2656 }
2657
send_login(struct ibmvnic_adapter * adapter)2658 static void send_login(struct ibmvnic_adapter *adapter)
2659 {
2660 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2661 struct ibmvnic_login_buffer *login_buffer;
2662 struct device *dev = &adapter->vdev->dev;
2663 dma_addr_t rsp_buffer_token;
2664 dma_addr_t buffer_token;
2665 size_t rsp_buffer_size;
2666 union ibmvnic_crq crq;
2667 size_t buffer_size;
2668 __be64 *tx_list_p;
2669 __be64 *rx_list_p;
2670 int i;
2671
2672 buffer_size =
2673 sizeof(struct ibmvnic_login_buffer) +
2674 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2675
2676 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2677 if (!login_buffer)
2678 goto buf_alloc_failed;
2679
2680 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2681 DMA_TO_DEVICE);
2682 if (dma_mapping_error(dev, buffer_token)) {
2683 dev_err(dev, "Couldn't map login buffer\n");
2684 goto buf_map_failed;
2685 }
2686
2687 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2688 sizeof(u64) * adapter->req_tx_queues +
2689 sizeof(u64) * adapter->req_rx_queues +
2690 sizeof(u64) * adapter->req_rx_queues +
2691 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2692
2693 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2694 if (!login_rsp_buffer)
2695 goto buf_rsp_alloc_failed;
2696
2697 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2698 rsp_buffer_size, DMA_FROM_DEVICE);
2699 if (dma_mapping_error(dev, rsp_buffer_token)) {
2700 dev_err(dev, "Couldn't map login rsp buffer\n");
2701 goto buf_rsp_map_failed;
2702 }
2703
2704 adapter->login_buf = login_buffer;
2705 adapter->login_buf_token = buffer_token;
2706 adapter->login_buf_sz = buffer_size;
2707 adapter->login_rsp_buf = login_rsp_buffer;
2708 adapter->login_rsp_buf_token = rsp_buffer_token;
2709 adapter->login_rsp_buf_sz = rsp_buffer_size;
2710
2711 login_buffer->len = cpu_to_be32(buffer_size);
2712 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2713 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2714 login_buffer->off_txcomp_subcrqs =
2715 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2716 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2717 login_buffer->off_rxcomp_subcrqs =
2718 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2719 sizeof(u64) * adapter->req_tx_queues);
2720 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2721 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2722
2723 tx_list_p = (__be64 *)((char *)login_buffer +
2724 sizeof(struct ibmvnic_login_buffer));
2725 rx_list_p = (__be64 *)((char *)login_buffer +
2726 sizeof(struct ibmvnic_login_buffer) +
2727 sizeof(u64) * adapter->req_tx_queues);
2728
2729 for (i = 0; i < adapter->req_tx_queues; i++) {
2730 if (adapter->tx_scrq[i]) {
2731 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2732 crq_num);
2733 }
2734 }
2735
2736 for (i = 0; i < adapter->req_rx_queues; i++) {
2737 if (adapter->rx_scrq[i]) {
2738 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2739 crq_num);
2740 }
2741 }
2742
2743 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2744 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2745 netdev_dbg(adapter->netdev, "%016lx\n",
2746 ((unsigned long int *)(adapter->login_buf))[i]);
2747 }
2748
2749 memset(&crq, 0, sizeof(crq));
2750 crq.login.first = IBMVNIC_CRQ_CMD;
2751 crq.login.cmd = LOGIN;
2752 crq.login.ioba = cpu_to_be32(buffer_token);
2753 crq.login.len = cpu_to_be32(buffer_size);
2754 ibmvnic_send_crq(adapter, &crq);
2755
2756 return;
2757
2758 buf_rsp_map_failed:
2759 kfree(login_rsp_buffer);
2760 buf_rsp_alloc_failed:
2761 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2762 buf_map_failed:
2763 kfree(login_buffer);
2764 buf_alloc_failed:
2765 return;
2766 }
2767
send_request_map(struct ibmvnic_adapter * adapter,dma_addr_t addr,u32 len,u8 map_id)2768 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2769 u32 len, u8 map_id)
2770 {
2771 union ibmvnic_crq crq;
2772
2773 memset(&crq, 0, sizeof(crq));
2774 crq.request_map.first = IBMVNIC_CRQ_CMD;
2775 crq.request_map.cmd = REQUEST_MAP;
2776 crq.request_map.map_id = map_id;
2777 crq.request_map.ioba = cpu_to_be32(addr);
2778 crq.request_map.len = cpu_to_be32(len);
2779 ibmvnic_send_crq(adapter, &crq);
2780 }
2781
send_request_unmap(struct ibmvnic_adapter * adapter,u8 map_id)2782 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2783 {
2784 union ibmvnic_crq crq;
2785
2786 memset(&crq, 0, sizeof(crq));
2787 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2788 crq.request_unmap.cmd = REQUEST_UNMAP;
2789 crq.request_unmap.map_id = map_id;
2790 ibmvnic_send_crq(adapter, &crq);
2791 }
2792
send_map_query(struct ibmvnic_adapter * adapter)2793 static void send_map_query(struct ibmvnic_adapter *adapter)
2794 {
2795 union ibmvnic_crq crq;
2796
2797 memset(&crq, 0, sizeof(crq));
2798 crq.query_map.first = IBMVNIC_CRQ_CMD;
2799 crq.query_map.cmd = QUERY_MAP;
2800 ibmvnic_send_crq(adapter, &crq);
2801 }
2802
2803 /* Send a series of CRQs requesting various capabilities of the VNIC server */
send_cap_queries(struct ibmvnic_adapter * adapter)2804 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2805 {
2806 union ibmvnic_crq crq;
2807
2808 atomic_set(&adapter->running_cap_crqs, 0);
2809 memset(&crq, 0, sizeof(crq));
2810 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2811 crq.query_capability.cmd = QUERY_CAPABILITY;
2812
2813 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2814 atomic_inc(&adapter->running_cap_crqs);
2815 ibmvnic_send_crq(adapter, &crq);
2816
2817 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2818 atomic_inc(&adapter->running_cap_crqs);
2819 ibmvnic_send_crq(adapter, &crq);
2820
2821 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2822 atomic_inc(&adapter->running_cap_crqs);
2823 ibmvnic_send_crq(adapter, &crq);
2824
2825 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2826 atomic_inc(&adapter->running_cap_crqs);
2827 ibmvnic_send_crq(adapter, &crq);
2828
2829 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2830 atomic_inc(&adapter->running_cap_crqs);
2831 ibmvnic_send_crq(adapter, &crq);
2832
2833 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2834 atomic_inc(&adapter->running_cap_crqs);
2835 ibmvnic_send_crq(adapter, &crq);
2836
2837 crq.query_capability.capability =
2838 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2839 atomic_inc(&adapter->running_cap_crqs);
2840 ibmvnic_send_crq(adapter, &crq);
2841
2842 crq.query_capability.capability =
2843 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2844 atomic_inc(&adapter->running_cap_crqs);
2845 ibmvnic_send_crq(adapter, &crq);
2846
2847 crq.query_capability.capability =
2848 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2849 atomic_inc(&adapter->running_cap_crqs);
2850 ibmvnic_send_crq(adapter, &crq);
2851
2852 crq.query_capability.capability =
2853 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2854 atomic_inc(&adapter->running_cap_crqs);
2855 ibmvnic_send_crq(adapter, &crq);
2856
2857 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2858 atomic_inc(&adapter->running_cap_crqs);
2859 ibmvnic_send_crq(adapter, &crq);
2860
2861 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2862 atomic_inc(&adapter->running_cap_crqs);
2863 ibmvnic_send_crq(adapter, &crq);
2864
2865 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2866 atomic_inc(&adapter->running_cap_crqs);
2867 ibmvnic_send_crq(adapter, &crq);
2868
2869 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2870 atomic_inc(&adapter->running_cap_crqs);
2871 ibmvnic_send_crq(adapter, &crq);
2872
2873 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2874 atomic_inc(&adapter->running_cap_crqs);
2875 ibmvnic_send_crq(adapter, &crq);
2876
2877 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2878 atomic_inc(&adapter->running_cap_crqs);
2879 ibmvnic_send_crq(adapter, &crq);
2880
2881 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2882 atomic_inc(&adapter->running_cap_crqs);
2883 ibmvnic_send_crq(adapter, &crq);
2884
2885 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2886 atomic_inc(&adapter->running_cap_crqs);
2887 ibmvnic_send_crq(adapter, &crq);
2888
2889 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2890 atomic_inc(&adapter->running_cap_crqs);
2891 ibmvnic_send_crq(adapter, &crq);
2892
2893 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2894 atomic_inc(&adapter->running_cap_crqs);
2895 ibmvnic_send_crq(adapter, &crq);
2896
2897 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2898 atomic_inc(&adapter->running_cap_crqs);
2899 ibmvnic_send_crq(adapter, &crq);
2900
2901 crq.query_capability.capability =
2902 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2903 atomic_inc(&adapter->running_cap_crqs);
2904 ibmvnic_send_crq(adapter, &crq);
2905
2906 crq.query_capability.capability =
2907 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2908 atomic_inc(&adapter->running_cap_crqs);
2909 ibmvnic_send_crq(adapter, &crq);
2910
2911 crq.query_capability.capability =
2912 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2913 atomic_inc(&adapter->running_cap_crqs);
2914 ibmvnic_send_crq(adapter, &crq);
2915
2916 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2917 atomic_inc(&adapter->running_cap_crqs);
2918 ibmvnic_send_crq(adapter, &crq);
2919 }
2920
handle_query_ip_offload_rsp(struct ibmvnic_adapter * adapter)2921 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2922 {
2923 struct device *dev = &adapter->vdev->dev;
2924 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2925 union ibmvnic_crq crq;
2926 int i;
2927
2928 dma_unmap_single(dev, adapter->ip_offload_tok,
2929 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2930
2931 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2932 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2933 netdev_dbg(adapter->netdev, "%016lx\n",
2934 ((unsigned long int *)(buf))[i]);
2935
2936 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2937 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2938 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2939 buf->tcp_ipv4_chksum);
2940 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2941 buf->tcp_ipv6_chksum);
2942 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2943 buf->udp_ipv4_chksum);
2944 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2945 buf->udp_ipv6_chksum);
2946 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2947 buf->large_tx_ipv4);
2948 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2949 buf->large_tx_ipv6);
2950 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2951 buf->large_rx_ipv4);
2952 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2953 buf->large_rx_ipv6);
2954 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2955 buf->max_ipv4_header_size);
2956 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2957 buf->max_ipv6_header_size);
2958 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2959 buf->max_tcp_header_size);
2960 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2961 buf->max_udp_header_size);
2962 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2963 buf->max_large_tx_size);
2964 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2965 buf->max_large_rx_size);
2966 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2967 buf->ipv6_extension_header);
2968 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2969 buf->tcp_pseudosum_req);
2970 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2971 buf->num_ipv6_ext_headers);
2972 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2973 buf->off_ipv6_ext_headers);
2974
2975 adapter->ip_offload_ctrl_tok =
2976 dma_map_single(dev, &adapter->ip_offload_ctrl,
2977 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2978
2979 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2980 dev_err(dev, "Couldn't map ip offload control buffer\n");
2981 return;
2982 }
2983
2984 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2985 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2986 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2987 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2988 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2989
2990 /* large_tx/rx disabled for now, additional features needed */
2991 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2992 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2993 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2994 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2995
2996 adapter->netdev->features = NETIF_F_GSO;
2997
2998 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2999 adapter->netdev->features |= NETIF_F_IP_CSUM;
3000
3001 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3002 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3003
3004 if ((adapter->netdev->features &
3005 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3006 adapter->netdev->features |= NETIF_F_RXCSUM;
3007
3008 memset(&crq, 0, sizeof(crq));
3009 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3010 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3011 crq.control_ip_offload.len =
3012 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3013 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3014 ibmvnic_send_crq(adapter, &crq);
3015 }
3016
handle_error_info_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3017 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3018 struct ibmvnic_adapter *adapter)
3019 {
3020 struct device *dev = &adapter->vdev->dev;
3021 struct ibmvnic_error_buff *error_buff, *tmp;
3022 unsigned long flags;
3023 bool found = false;
3024 int i;
3025
3026 if (!crq->request_error_rsp.rc.code) {
3027 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3028 crq->request_error_rsp.rc.code);
3029 return;
3030 }
3031
3032 spin_lock_irqsave(&adapter->error_list_lock, flags);
3033 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3034 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3035 found = true;
3036 list_del(&error_buff->list);
3037 break;
3038 }
3039 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3040
3041 if (!found) {
3042 dev_err(dev, "Couldn't find error id %x\n",
3043 be32_to_cpu(crq->request_error_rsp.error_id));
3044 return;
3045 }
3046
3047 dev_err(dev, "Detailed info for error id %x:",
3048 be32_to_cpu(crq->request_error_rsp.error_id));
3049
3050 for (i = 0; i < error_buff->len; i++) {
3051 pr_cont("%02x", (int)error_buff->buff[i]);
3052 if (i % 8 == 7)
3053 pr_cont(" ");
3054 }
3055 pr_cont("\n");
3056
3057 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3058 DMA_FROM_DEVICE);
3059 kfree(error_buff->buff);
3060 kfree(error_buff);
3061 }
3062
request_error_information(struct ibmvnic_adapter * adapter,union ibmvnic_crq * err_crq)3063 static void request_error_information(struct ibmvnic_adapter *adapter,
3064 union ibmvnic_crq *err_crq)
3065 {
3066 struct device *dev = &adapter->vdev->dev;
3067 struct net_device *netdev = adapter->netdev;
3068 struct ibmvnic_error_buff *error_buff;
3069 unsigned long timeout = msecs_to_jiffies(30000);
3070 union ibmvnic_crq crq;
3071 unsigned long flags;
3072 int rc, detail_len;
3073
3074 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3075 if (!error_buff)
3076 return;
3077
3078 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3079 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3080 if (!error_buff->buff) {
3081 kfree(error_buff);
3082 return;
3083 }
3084
3085 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3086 DMA_FROM_DEVICE);
3087 if (dma_mapping_error(dev, error_buff->dma)) {
3088 netdev_err(netdev, "Couldn't map error buffer\n");
3089 kfree(error_buff->buff);
3090 kfree(error_buff);
3091 return;
3092 }
3093
3094 error_buff->len = detail_len;
3095 error_buff->error_id = err_crq->error_indication.error_id;
3096
3097 spin_lock_irqsave(&adapter->error_list_lock, flags);
3098 list_add_tail(&error_buff->list, &adapter->errors);
3099 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3100
3101 memset(&crq, 0, sizeof(crq));
3102 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3103 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3104 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3105 crq.request_error_info.len = cpu_to_be32(detail_len);
3106 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3107
3108 rc = ibmvnic_send_crq(adapter, &crq);
3109 if (rc) {
3110 netdev_err(netdev, "failed to request error information\n");
3111 goto err_info_fail;
3112 }
3113
3114 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3115 netdev_err(netdev, "timeout waiting for error information\n");
3116 goto err_info_fail;
3117 }
3118
3119 return;
3120
3121 err_info_fail:
3122 spin_lock_irqsave(&adapter->error_list_lock, flags);
3123 list_del(&error_buff->list);
3124 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3125
3126 kfree(error_buff->buff);
3127 kfree(error_buff);
3128 }
3129
handle_error_indication(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3130 static void handle_error_indication(union ibmvnic_crq *crq,
3131 struct ibmvnic_adapter *adapter)
3132 {
3133 struct device *dev = &adapter->vdev->dev;
3134
3135 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3136 crq->error_indication.flags
3137 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3138 be32_to_cpu(crq->error_indication.error_id),
3139 be16_to_cpu(crq->error_indication.error_cause));
3140
3141 if (be32_to_cpu(crq->error_indication.error_id))
3142 request_error_information(adapter, crq);
3143
3144 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3145 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3146 else
3147 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3148 }
3149
handle_change_mac_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3150 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3151 struct ibmvnic_adapter *adapter)
3152 {
3153 struct net_device *netdev = adapter->netdev;
3154 struct device *dev = &adapter->vdev->dev;
3155 long rc;
3156
3157 rc = crq->change_mac_addr_rsp.rc.code;
3158 if (rc) {
3159 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3160 return;
3161 }
3162 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3163 ETH_ALEN);
3164 }
3165
handle_request_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3166 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3167 struct ibmvnic_adapter *adapter)
3168 {
3169 struct device *dev = &adapter->vdev->dev;
3170 u64 *req_value;
3171 char *name;
3172
3173 atomic_dec(&adapter->running_cap_crqs);
3174 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3175 case REQ_TX_QUEUES:
3176 req_value = &adapter->req_tx_queues;
3177 name = "tx";
3178 break;
3179 case REQ_RX_QUEUES:
3180 req_value = &adapter->req_rx_queues;
3181 name = "rx";
3182 break;
3183 case REQ_RX_ADD_QUEUES:
3184 req_value = &adapter->req_rx_add_queues;
3185 name = "rx_add";
3186 break;
3187 case REQ_TX_ENTRIES_PER_SUBCRQ:
3188 req_value = &adapter->req_tx_entries_per_subcrq;
3189 name = "tx_entries_per_subcrq";
3190 break;
3191 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3192 req_value = &adapter->req_rx_add_entries_per_subcrq;
3193 name = "rx_add_entries_per_subcrq";
3194 break;
3195 case REQ_MTU:
3196 req_value = &adapter->req_mtu;
3197 name = "mtu";
3198 break;
3199 case PROMISC_REQUESTED:
3200 req_value = &adapter->promisc;
3201 name = "promisc";
3202 break;
3203 default:
3204 dev_err(dev, "Got invalid cap request rsp %d\n",
3205 crq->request_capability.capability);
3206 return;
3207 }
3208
3209 switch (crq->request_capability_rsp.rc.code) {
3210 case SUCCESS:
3211 break;
3212 case PARTIALSUCCESS:
3213 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3214 *req_value,
3215 (long int)be64_to_cpu(crq->request_capability_rsp.
3216 number), name);
3217 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3218 ibmvnic_send_req_caps(adapter, 1);
3219 return;
3220 default:
3221 dev_err(dev, "Error %d in request cap rsp\n",
3222 crq->request_capability_rsp.rc.code);
3223 return;
3224 }
3225
3226 /* Done receiving requested capabilities, query IP offload support */
3227 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3228 union ibmvnic_crq newcrq;
3229 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3230 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3231 &adapter->ip_offload_buf;
3232
3233 adapter->wait_capability = false;
3234 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3235 buf_sz,
3236 DMA_FROM_DEVICE);
3237
3238 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3239 if (!firmware_has_feature(FW_FEATURE_CMO))
3240 dev_err(dev, "Couldn't map offload buffer\n");
3241 return;
3242 }
3243
3244 memset(&newcrq, 0, sizeof(newcrq));
3245 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3246 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3247 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3248 newcrq.query_ip_offload.ioba =
3249 cpu_to_be32(adapter->ip_offload_tok);
3250
3251 ibmvnic_send_crq(adapter, &newcrq);
3252 }
3253 }
3254
handle_login_rsp(union ibmvnic_crq * login_rsp_crq,struct ibmvnic_adapter * adapter)3255 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3256 struct ibmvnic_adapter *adapter)
3257 {
3258 struct device *dev = &adapter->vdev->dev;
3259 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3260 struct ibmvnic_login_buffer *login = adapter->login_buf;
3261 int i;
3262
3263 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3264 DMA_BIDIRECTIONAL);
3265 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3266 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3267
3268 /* If the number of queues requested can't be allocated by the
3269 * server, the login response will return with code 1. We will need
3270 * to resend the login buffer with fewer queues requested.
3271 */
3272 if (login_rsp_crq->generic.rc.code) {
3273 adapter->renegotiate = true;
3274 complete(&adapter->init_done);
3275 return 0;
3276 }
3277
3278 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3279 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3280 netdev_dbg(adapter->netdev, "%016lx\n",
3281 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3282 }
3283
3284 /* Sanity checks */
3285 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3286 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3287 adapter->req_rx_add_queues !=
3288 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3289 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3290 ibmvnic_remove(adapter->vdev);
3291 return -EIO;
3292 }
3293 complete(&adapter->init_done);
3294
3295 return 0;
3296 }
3297
handle_request_unmap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3298 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3299 struct ibmvnic_adapter *adapter)
3300 {
3301 struct device *dev = &adapter->vdev->dev;
3302 long rc;
3303
3304 rc = crq->request_unmap_rsp.rc.code;
3305 if (rc)
3306 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3307 }
3308
handle_query_map_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3309 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3310 struct ibmvnic_adapter *adapter)
3311 {
3312 struct net_device *netdev = adapter->netdev;
3313 struct device *dev = &adapter->vdev->dev;
3314 long rc;
3315
3316 rc = crq->query_map_rsp.rc.code;
3317 if (rc) {
3318 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3319 return;
3320 }
3321 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3322 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3323 crq->query_map_rsp.free_pages);
3324 }
3325
handle_query_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3326 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3327 struct ibmvnic_adapter *adapter)
3328 {
3329 struct net_device *netdev = adapter->netdev;
3330 struct device *dev = &adapter->vdev->dev;
3331 long rc;
3332
3333 atomic_dec(&adapter->running_cap_crqs);
3334 netdev_dbg(netdev, "Outstanding queries: %d\n",
3335 atomic_read(&adapter->running_cap_crqs));
3336 rc = crq->query_capability.rc.code;
3337 if (rc) {
3338 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3339 goto out;
3340 }
3341
3342 switch (be16_to_cpu(crq->query_capability.capability)) {
3343 case MIN_TX_QUEUES:
3344 adapter->min_tx_queues =
3345 be64_to_cpu(crq->query_capability.number);
3346 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3347 adapter->min_tx_queues);
3348 break;
3349 case MIN_RX_QUEUES:
3350 adapter->min_rx_queues =
3351 be64_to_cpu(crq->query_capability.number);
3352 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3353 adapter->min_rx_queues);
3354 break;
3355 case MIN_RX_ADD_QUEUES:
3356 adapter->min_rx_add_queues =
3357 be64_to_cpu(crq->query_capability.number);
3358 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3359 adapter->min_rx_add_queues);
3360 break;
3361 case MAX_TX_QUEUES:
3362 adapter->max_tx_queues =
3363 be64_to_cpu(crq->query_capability.number);
3364 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3365 adapter->max_tx_queues);
3366 break;
3367 case MAX_RX_QUEUES:
3368 adapter->max_rx_queues =
3369 be64_to_cpu(crq->query_capability.number);
3370 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3371 adapter->max_rx_queues);
3372 break;
3373 case MAX_RX_ADD_QUEUES:
3374 adapter->max_rx_add_queues =
3375 be64_to_cpu(crq->query_capability.number);
3376 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3377 adapter->max_rx_add_queues);
3378 break;
3379 case MIN_TX_ENTRIES_PER_SUBCRQ:
3380 adapter->min_tx_entries_per_subcrq =
3381 be64_to_cpu(crq->query_capability.number);
3382 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3383 adapter->min_tx_entries_per_subcrq);
3384 break;
3385 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3386 adapter->min_rx_add_entries_per_subcrq =
3387 be64_to_cpu(crq->query_capability.number);
3388 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3389 adapter->min_rx_add_entries_per_subcrq);
3390 break;
3391 case MAX_TX_ENTRIES_PER_SUBCRQ:
3392 adapter->max_tx_entries_per_subcrq =
3393 be64_to_cpu(crq->query_capability.number);
3394 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3395 adapter->max_tx_entries_per_subcrq);
3396 break;
3397 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3398 adapter->max_rx_add_entries_per_subcrq =
3399 be64_to_cpu(crq->query_capability.number);
3400 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3401 adapter->max_rx_add_entries_per_subcrq);
3402 break;
3403 case TCP_IP_OFFLOAD:
3404 adapter->tcp_ip_offload =
3405 be64_to_cpu(crq->query_capability.number);
3406 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3407 adapter->tcp_ip_offload);
3408 break;
3409 case PROMISC_SUPPORTED:
3410 adapter->promisc_supported =
3411 be64_to_cpu(crq->query_capability.number);
3412 netdev_dbg(netdev, "promisc_supported = %lld\n",
3413 adapter->promisc_supported);
3414 break;
3415 case MIN_MTU:
3416 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3417 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3418 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3419 break;
3420 case MAX_MTU:
3421 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3422 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3423 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3424 break;
3425 case MAX_MULTICAST_FILTERS:
3426 adapter->max_multicast_filters =
3427 be64_to_cpu(crq->query_capability.number);
3428 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3429 adapter->max_multicast_filters);
3430 break;
3431 case VLAN_HEADER_INSERTION:
3432 adapter->vlan_header_insertion =
3433 be64_to_cpu(crq->query_capability.number);
3434 if (adapter->vlan_header_insertion)
3435 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3436 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3437 adapter->vlan_header_insertion);
3438 break;
3439 case RX_VLAN_HEADER_INSERTION:
3440 adapter->rx_vlan_header_insertion =
3441 be64_to_cpu(crq->query_capability.number);
3442 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3443 adapter->rx_vlan_header_insertion);
3444 break;
3445 case MAX_TX_SG_ENTRIES:
3446 adapter->max_tx_sg_entries =
3447 be64_to_cpu(crq->query_capability.number);
3448 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3449 adapter->max_tx_sg_entries);
3450 break;
3451 case RX_SG_SUPPORTED:
3452 adapter->rx_sg_supported =
3453 be64_to_cpu(crq->query_capability.number);
3454 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3455 adapter->rx_sg_supported);
3456 break;
3457 case OPT_TX_COMP_SUB_QUEUES:
3458 adapter->opt_tx_comp_sub_queues =
3459 be64_to_cpu(crq->query_capability.number);
3460 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3461 adapter->opt_tx_comp_sub_queues);
3462 break;
3463 case OPT_RX_COMP_QUEUES:
3464 adapter->opt_rx_comp_queues =
3465 be64_to_cpu(crq->query_capability.number);
3466 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3467 adapter->opt_rx_comp_queues);
3468 break;
3469 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3470 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3471 be64_to_cpu(crq->query_capability.number);
3472 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3473 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3474 break;
3475 case OPT_TX_ENTRIES_PER_SUBCRQ:
3476 adapter->opt_tx_entries_per_subcrq =
3477 be64_to_cpu(crq->query_capability.number);
3478 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3479 adapter->opt_tx_entries_per_subcrq);
3480 break;
3481 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3482 adapter->opt_rxba_entries_per_subcrq =
3483 be64_to_cpu(crq->query_capability.number);
3484 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3485 adapter->opt_rxba_entries_per_subcrq);
3486 break;
3487 case TX_RX_DESC_REQ:
3488 adapter->tx_rx_desc_req = crq->query_capability.number;
3489 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3490 adapter->tx_rx_desc_req);
3491 break;
3492
3493 default:
3494 netdev_err(netdev, "Got invalid cap rsp %d\n",
3495 crq->query_capability.capability);
3496 }
3497
3498 out:
3499 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3500 adapter->wait_capability = false;
3501 ibmvnic_send_req_caps(adapter, 0);
3502 }
3503 }
3504
ibmvnic_handle_crq(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)3505 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3506 struct ibmvnic_adapter *adapter)
3507 {
3508 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3509 struct net_device *netdev = adapter->netdev;
3510 struct device *dev = &adapter->vdev->dev;
3511 u64 *u64_crq = (u64 *)crq;
3512 long rc;
3513
3514 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3515 (unsigned long int)cpu_to_be64(u64_crq[0]),
3516 (unsigned long int)cpu_to_be64(u64_crq[1]));
3517 switch (gen_crq->first) {
3518 case IBMVNIC_CRQ_INIT_RSP:
3519 switch (gen_crq->cmd) {
3520 case IBMVNIC_CRQ_INIT:
3521 dev_info(dev, "Partner initialized\n");
3522 adapter->from_passive_init = true;
3523 complete(&adapter->init_done);
3524 break;
3525 case IBMVNIC_CRQ_INIT_COMPLETE:
3526 dev_info(dev, "Partner initialization complete\n");
3527 send_version_xchg(adapter);
3528 break;
3529 default:
3530 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3531 }
3532 return;
3533 case IBMVNIC_CRQ_XPORT_EVENT:
3534 netif_carrier_off(netdev);
3535 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3536 dev_info(dev, "Migrated, re-enabling adapter\n");
3537 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3538 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3539 dev_info(dev, "Backing device failover detected\n");
3540 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3541 } else {
3542 /* The adapter lost the connection */
3543 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3544 gen_crq->cmd);
3545 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3546 }
3547 return;
3548 case IBMVNIC_CRQ_CMD_RSP:
3549 break;
3550 default:
3551 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3552 gen_crq->first);
3553 return;
3554 }
3555
3556 switch (gen_crq->cmd) {
3557 case VERSION_EXCHANGE_RSP:
3558 rc = crq->version_exchange_rsp.rc.code;
3559 if (rc) {
3560 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3561 break;
3562 }
3563 dev_info(dev, "Partner protocol version is %d\n",
3564 crq->version_exchange_rsp.version);
3565 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3566 ibmvnic_version)
3567 ibmvnic_version =
3568 be16_to_cpu(crq->version_exchange_rsp.version);
3569 send_cap_queries(adapter);
3570 break;
3571 case QUERY_CAPABILITY_RSP:
3572 handle_query_cap_rsp(crq, adapter);
3573 break;
3574 case QUERY_MAP_RSP:
3575 handle_query_map_rsp(crq, adapter);
3576 break;
3577 case REQUEST_MAP_RSP:
3578 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3579 complete(&adapter->fw_done);
3580 break;
3581 case REQUEST_UNMAP_RSP:
3582 handle_request_unmap_rsp(crq, adapter);
3583 break;
3584 case REQUEST_CAPABILITY_RSP:
3585 handle_request_cap_rsp(crq, adapter);
3586 break;
3587 case LOGIN_RSP:
3588 netdev_dbg(netdev, "Got Login Response\n");
3589 handle_login_rsp(crq, adapter);
3590 break;
3591 case LOGICAL_LINK_STATE_RSP:
3592 netdev_dbg(netdev,
3593 "Got Logical Link State Response, state: %d rc: %d\n",
3594 crq->logical_link_state_rsp.link_state,
3595 crq->logical_link_state_rsp.rc.code);
3596 adapter->logical_link_state =
3597 crq->logical_link_state_rsp.link_state;
3598 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3599 complete(&adapter->init_done);
3600 break;
3601 case LINK_STATE_INDICATION:
3602 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3603 adapter->phys_link_state =
3604 crq->link_state_indication.phys_link_state;
3605 adapter->logical_link_state =
3606 crq->link_state_indication.logical_link_state;
3607 break;
3608 case CHANGE_MAC_ADDR_RSP:
3609 netdev_dbg(netdev, "Got MAC address change Response\n");
3610 handle_change_mac_rsp(crq, adapter);
3611 break;
3612 case ERROR_INDICATION:
3613 netdev_dbg(netdev, "Got Error Indication\n");
3614 handle_error_indication(crq, adapter);
3615 break;
3616 case REQUEST_ERROR_RSP:
3617 netdev_dbg(netdev, "Got Error Detail Response\n");
3618 handle_error_info_rsp(crq, adapter);
3619 break;
3620 case REQUEST_STATISTICS_RSP:
3621 netdev_dbg(netdev, "Got Statistics Response\n");
3622 complete(&adapter->stats_done);
3623 break;
3624 case QUERY_IP_OFFLOAD_RSP:
3625 netdev_dbg(netdev, "Got Query IP offload Response\n");
3626 handle_query_ip_offload_rsp(adapter);
3627 break;
3628 case MULTICAST_CTRL_RSP:
3629 netdev_dbg(netdev, "Got multicast control Response\n");
3630 break;
3631 case CONTROL_IP_OFFLOAD_RSP:
3632 netdev_dbg(netdev, "Got Control IP offload Response\n");
3633 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3634 sizeof(adapter->ip_offload_ctrl),
3635 DMA_TO_DEVICE);
3636 complete(&adapter->init_done);
3637 break;
3638 case COLLECT_FW_TRACE_RSP:
3639 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3640 complete(&adapter->fw_done);
3641 break;
3642 default:
3643 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3644 gen_crq->cmd);
3645 }
3646 }
3647
ibmvnic_interrupt(int irq,void * instance)3648 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3649 {
3650 struct ibmvnic_adapter *adapter = instance;
3651
3652 tasklet_schedule(&adapter->tasklet);
3653 return IRQ_HANDLED;
3654 }
3655
ibmvnic_tasklet(void * data)3656 static void ibmvnic_tasklet(void *data)
3657 {
3658 struct ibmvnic_adapter *adapter = data;
3659 struct ibmvnic_crq_queue *queue = &adapter->crq;
3660 union ibmvnic_crq *crq;
3661 unsigned long flags;
3662 bool done = false;
3663
3664 spin_lock_irqsave(&queue->lock, flags);
3665 while (!done) {
3666 /* Pull all the valid messages off the CRQ */
3667 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3668 ibmvnic_handle_crq(crq, adapter);
3669 crq->generic.first = 0;
3670 }
3671
3672 /* remain in tasklet until all
3673 * capabilities responses are received
3674 */
3675 if (!adapter->wait_capability)
3676 done = true;
3677 }
3678 /* if capabilities CRQ's were sent in this tasklet, the following
3679 * tasklet must wait until all responses are received
3680 */
3681 if (atomic_read(&adapter->running_cap_crqs) != 0)
3682 adapter->wait_capability = true;
3683 spin_unlock_irqrestore(&queue->lock, flags);
3684 }
3685
ibmvnic_reenable_crq_queue(struct ibmvnic_adapter * adapter)3686 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3687 {
3688 struct vio_dev *vdev = adapter->vdev;
3689 int rc;
3690
3691 do {
3692 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3693 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3694
3695 if (rc)
3696 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3697
3698 return rc;
3699 }
3700
ibmvnic_reset_crq(struct ibmvnic_adapter * adapter)3701 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3702 {
3703 struct ibmvnic_crq_queue *crq = &adapter->crq;
3704 struct device *dev = &adapter->vdev->dev;
3705 struct vio_dev *vdev = adapter->vdev;
3706 int rc;
3707
3708 /* Close the CRQ */
3709 do {
3710 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3711 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3712
3713 /* Clean out the queue */
3714 memset(crq->msgs, 0, PAGE_SIZE);
3715 crq->cur = 0;
3716
3717 /* And re-open it again */
3718 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3719 crq->msg_token, PAGE_SIZE);
3720
3721 if (rc == H_CLOSED)
3722 /* Adapter is good, but other end is not ready */
3723 dev_warn(dev, "Partner adapter not ready\n");
3724 else if (rc != 0)
3725 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3726
3727 return rc;
3728 }
3729
release_crq_queue(struct ibmvnic_adapter * adapter)3730 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3731 {
3732 struct ibmvnic_crq_queue *crq = &adapter->crq;
3733 struct vio_dev *vdev = adapter->vdev;
3734 long rc;
3735
3736 if (!crq->msgs)
3737 return;
3738
3739 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3740 free_irq(vdev->irq, adapter);
3741 tasklet_kill(&adapter->tasklet);
3742 do {
3743 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3744 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3745
3746 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3747 DMA_BIDIRECTIONAL);
3748 free_page((unsigned long)crq->msgs);
3749 crq->msgs = NULL;
3750 }
3751
init_crq_queue(struct ibmvnic_adapter * adapter)3752 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3753 {
3754 struct ibmvnic_crq_queue *crq = &adapter->crq;
3755 struct device *dev = &adapter->vdev->dev;
3756 struct vio_dev *vdev = adapter->vdev;
3757 int rc, retrc = -ENOMEM;
3758
3759 if (crq->msgs)
3760 return 0;
3761
3762 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3763 /* Should we allocate more than one page? */
3764
3765 if (!crq->msgs)
3766 return -ENOMEM;
3767
3768 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3769 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3770 DMA_BIDIRECTIONAL);
3771 if (dma_mapping_error(dev, crq->msg_token))
3772 goto map_failed;
3773
3774 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3775 crq->msg_token, PAGE_SIZE);
3776
3777 if (rc == H_RESOURCE)
3778 /* maybe kexecing and resource is busy. try a reset */
3779 rc = ibmvnic_reset_crq(adapter);
3780 retrc = rc;
3781
3782 if (rc == H_CLOSED) {
3783 dev_warn(dev, "Partner adapter not ready\n");
3784 } else if (rc) {
3785 dev_warn(dev, "Error %d opening adapter\n", rc);
3786 goto reg_crq_failed;
3787 }
3788
3789 retrc = 0;
3790
3791 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3792 (unsigned long)adapter);
3793
3794 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3795 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3796 adapter);
3797 if (rc) {
3798 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3799 vdev->irq, rc);
3800 goto req_irq_failed;
3801 }
3802
3803 rc = vio_enable_interrupts(vdev);
3804 if (rc) {
3805 dev_err(dev, "Error %d enabling interrupts\n", rc);
3806 goto req_irq_failed;
3807 }
3808
3809 crq->cur = 0;
3810 spin_lock_init(&crq->lock);
3811
3812 return retrc;
3813
3814 req_irq_failed:
3815 tasklet_kill(&adapter->tasklet);
3816 do {
3817 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3818 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3819 reg_crq_failed:
3820 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3821 map_failed:
3822 free_page((unsigned long)crq->msgs);
3823 crq->msgs = NULL;
3824 return retrc;
3825 }
3826
ibmvnic_init(struct ibmvnic_adapter * adapter)3827 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3828 {
3829 struct device *dev = &adapter->vdev->dev;
3830 unsigned long timeout = msecs_to_jiffies(30000);
3831 int rc;
3832
3833 if (adapter->resetting) {
3834 rc = ibmvnic_reset_crq(adapter);
3835 if (!rc)
3836 rc = vio_enable_interrupts(adapter->vdev);
3837 } else {
3838 rc = init_crq_queue(adapter);
3839 }
3840
3841 if (rc) {
3842 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3843 return rc;
3844 }
3845
3846 adapter->from_passive_init = false;
3847
3848 init_completion(&adapter->init_done);
3849 adapter->init_done_rc = 0;
3850 ibmvnic_send_crq_init(adapter);
3851 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3852 dev_err(dev, "Initialization sequence timed out\n");
3853 return -1;
3854 }
3855
3856 if (adapter->init_done_rc) {
3857 release_crq_queue(adapter);
3858 return adapter->init_done_rc;
3859 }
3860
3861 if (adapter->from_passive_init) {
3862 adapter->state = VNIC_OPEN;
3863 adapter->from_passive_init = false;
3864 return -1;
3865 }
3866
3867 if (adapter->resetting)
3868 rc = reset_sub_crq_queues(adapter);
3869 else
3870 rc = init_sub_crqs(adapter);
3871 if (rc) {
3872 dev_err(dev, "Initialization of sub crqs failed\n");
3873 release_crq_queue(adapter);
3874 return rc;
3875 }
3876
3877 rc = init_sub_crq_irqs(adapter);
3878 if (rc) {
3879 dev_err(dev, "Failed to initialize sub crq irqs\n");
3880 release_crq_queue(adapter);
3881 }
3882
3883 return rc;
3884 }
3885
3886 static struct device_attribute dev_attr_failover;
3887
ibmvnic_probe(struct vio_dev * dev,const struct vio_device_id * id)3888 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3889 {
3890 struct ibmvnic_adapter *adapter;
3891 struct net_device *netdev;
3892 unsigned char *mac_addr_p;
3893 int rc;
3894
3895 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3896 dev->unit_address);
3897
3898 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3899 VETH_MAC_ADDR, NULL);
3900 if (!mac_addr_p) {
3901 dev_err(&dev->dev,
3902 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3903 __FILE__, __LINE__);
3904 return 0;
3905 }
3906
3907 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3908 IBMVNIC_MAX_TX_QUEUES);
3909 if (!netdev)
3910 return -ENOMEM;
3911
3912 adapter = netdev_priv(netdev);
3913 adapter->state = VNIC_PROBING;
3914 dev_set_drvdata(&dev->dev, netdev);
3915 adapter->vdev = dev;
3916 adapter->netdev = netdev;
3917
3918 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3919 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3920 netdev->irq = dev->irq;
3921 netdev->netdev_ops = &ibmvnic_netdev_ops;
3922 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3923 SET_NETDEV_DEV(netdev, &dev->dev);
3924
3925 spin_lock_init(&adapter->stats_lock);
3926
3927 INIT_LIST_HEAD(&adapter->errors);
3928 spin_lock_init(&adapter->error_list_lock);
3929
3930 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3931 INIT_LIST_HEAD(&adapter->rwi_list);
3932 mutex_init(&adapter->reset_lock);
3933 mutex_init(&adapter->rwi_lock);
3934 adapter->resetting = false;
3935
3936 do {
3937 rc = ibmvnic_init(adapter);
3938 if (rc && rc != EAGAIN)
3939 goto ibmvnic_init_fail;
3940 } while (rc == EAGAIN);
3941
3942 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3943
3944 rc = device_create_file(&dev->dev, &dev_attr_failover);
3945 if (rc)
3946 goto ibmvnic_init_fail;
3947
3948 netif_carrier_off(netdev);
3949 rc = register_netdev(netdev);
3950 if (rc) {
3951 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3952 goto ibmvnic_register_fail;
3953 }
3954 dev_info(&dev->dev, "ibmvnic registered\n");
3955
3956 adapter->state = VNIC_PROBED;
3957 return 0;
3958
3959 ibmvnic_register_fail:
3960 device_remove_file(&dev->dev, &dev_attr_failover);
3961
3962 ibmvnic_init_fail:
3963 release_sub_crqs(adapter);
3964 release_crq_queue(adapter);
3965 free_netdev(netdev);
3966
3967 return rc;
3968 }
3969
ibmvnic_remove(struct vio_dev * dev)3970 static int ibmvnic_remove(struct vio_dev *dev)
3971 {
3972 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3973 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3974
3975 adapter->state = VNIC_REMOVING;
3976 unregister_netdev(netdev);
3977 mutex_lock(&adapter->reset_lock);
3978
3979 release_resources(adapter);
3980 release_sub_crqs(adapter);
3981 release_crq_queue(adapter);
3982
3983 adapter->state = VNIC_REMOVED;
3984
3985 mutex_unlock(&adapter->reset_lock);
3986 device_remove_file(&dev->dev, &dev_attr_failover);
3987 free_netdev(netdev);
3988 dev_set_drvdata(&dev->dev, NULL);
3989
3990 return 0;
3991 }
3992
failover_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)3993 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3994 const char *buf, size_t count)
3995 {
3996 struct net_device *netdev = dev_get_drvdata(dev);
3997 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3998 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3999 __be64 session_token;
4000 long rc;
4001
4002 if (!sysfs_streq(buf, "1"))
4003 return -EINVAL;
4004
4005 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4006 H_GET_SESSION_TOKEN, 0, 0, 0);
4007 if (rc) {
4008 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4009 rc);
4010 return -EINVAL;
4011 }
4012
4013 session_token = (__be64)retbuf[0];
4014 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4015 be64_to_cpu(session_token));
4016 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4017 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4018 if (rc) {
4019 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4020 rc);
4021 return -EINVAL;
4022 }
4023
4024 return count;
4025 }
4026
4027 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
4028
ibmvnic_get_desired_dma(struct vio_dev * vdev)4029 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4030 {
4031 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4032 struct ibmvnic_adapter *adapter;
4033 struct iommu_table *tbl;
4034 unsigned long ret = 0;
4035 int i;
4036
4037 tbl = get_iommu_table_base(&vdev->dev);
4038
4039 /* netdev inits at probe time along with the structures we need below*/
4040 if (!netdev)
4041 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4042
4043 adapter = netdev_priv(netdev);
4044
4045 ret += PAGE_SIZE; /* the crq message queue */
4046 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4047
4048 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4049 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4050
4051 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4052 i++)
4053 ret += adapter->rx_pool[i].size *
4054 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4055
4056 return ret;
4057 }
4058
ibmvnic_resume(struct device * dev)4059 static int ibmvnic_resume(struct device *dev)
4060 {
4061 struct net_device *netdev = dev_get_drvdata(dev);
4062 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4063
4064 if (adapter->state != VNIC_OPEN)
4065 return 0;
4066
4067 tasklet_schedule(&adapter->tasklet);
4068
4069 return 0;
4070 }
4071
4072 static const struct vio_device_id ibmvnic_device_table[] = {
4073 {"network", "IBM,vnic"},
4074 {"", "" }
4075 };
4076 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4077
4078 static const struct dev_pm_ops ibmvnic_pm_ops = {
4079 .resume = ibmvnic_resume
4080 };
4081
4082 static struct vio_driver ibmvnic_driver = {
4083 .id_table = ibmvnic_device_table,
4084 .probe = ibmvnic_probe,
4085 .remove = ibmvnic_remove,
4086 .get_desired_dma = ibmvnic_get_desired_dma,
4087 .name = ibmvnic_driver_name,
4088 .pm = &ibmvnic_pm_ops,
4089 };
4090
4091 /* module functions */
ibmvnic_module_init(void)4092 static int __init ibmvnic_module_init(void)
4093 {
4094 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4095 IBMVNIC_DRIVER_VERSION);
4096
4097 return vio_register_driver(&ibmvnic_driver);
4098 }
4099
ibmvnic_module_exit(void)4100 static void __exit ibmvnic_module_exit(void)
4101 {
4102 vio_unregister_driver(&ibmvnic_driver);
4103 }
4104
4105 module_init(ibmvnic_module_init);
4106 module_exit(ibmvnic_module_exit);
4107