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[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
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/debugfs.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
73 #include <asm/vio.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/workqueue.h>
78
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 <santi_leon@yahoo.com>");
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 void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
98 union sub_crq *sub_crq);
99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
101 static int enable_scrq_irq(struct ibmvnic_adapter *,
102 struct ibmvnic_sub_crq_queue *);
103 static int disable_scrq_irq(struct ibmvnic_adapter *,
104 struct ibmvnic_sub_crq_queue *);
105 static int pending_scrq(struct ibmvnic_adapter *,
106 struct ibmvnic_sub_crq_queue *);
107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
108 struct ibmvnic_sub_crq_queue *);
109 static int ibmvnic_poll(struct napi_struct *napi, int data);
110 static void send_map_query(struct ibmvnic_adapter *adapter);
111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
113
114 struct ibmvnic_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117 };
118
119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
120 offsetof(struct ibmvnic_statistics, stat))
121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
122
123 static const struct ibmvnic_stat ibmvnic_stats[] = {
124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
146 };
147
148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
149 unsigned long length, unsigned long *number,
150 unsigned long *irq)
151 {
152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
153 long rc;
154
155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
156 *number = retbuf[0];
157 *irq = retbuf[1];
158
159 return rc;
160 }
161
162 /* net_device_ops functions */
163
164 static void init_rx_pool(struct ibmvnic_adapter *adapter,
165 struct ibmvnic_rx_pool *rx_pool, int num, int index,
166 int buff_size, int active)
167 {
168 netdev_dbg(adapter->netdev,
169 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
170 index, num, buff_size);
171 rx_pool->size = num;
172 rx_pool->index = index;
173 rx_pool->buff_size = buff_size;
174 rx_pool->active = active;
175 }
176
177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
178 struct ibmvnic_long_term_buff *ltb, int size)
179 {
180 struct device *dev = &adapter->vdev->dev;
181
182 ltb->size = size;
183 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
184 GFP_KERNEL);
185
186 if (!ltb->buff) {
187 dev_err(dev, "Couldn't alloc long term buffer\n");
188 return -ENOMEM;
189 }
190 ltb->map_id = adapter->map_id;
191 adapter->map_id++;
192
193 init_completion(&adapter->fw_done);
194 send_request_map(adapter, ltb->addr,
195 ltb->size, ltb->map_id);
196 wait_for_completion(&adapter->fw_done);
197 return 0;
198 }
199
200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
201 struct ibmvnic_long_term_buff *ltb)
202 {
203 struct device *dev = &adapter->vdev->dev;
204
205 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
206 if (!adapter->failover)
207 send_request_unmap(adapter, ltb->map_id);
208 }
209
210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_rx_pool *pool)
212 {
213 struct device *dev = &adapter->vdev->dev;
214 int i;
215
216 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
217 if (!pool->free_map)
218 return -ENOMEM;
219
220 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
221 GFP_KERNEL);
222
223 if (!pool->rx_buff) {
224 dev_err(dev, "Couldn't alloc rx buffers\n");
225 kfree(pool->free_map);
226 return -ENOMEM;
227 }
228
229 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
230 pool->size * pool->buff_size)) {
231 kfree(pool->free_map);
232 kfree(pool->rx_buff);
233 return -ENOMEM;
234 }
235
236 for (i = 0; i < pool->size; ++i)
237 pool->free_map[i] = i;
238
239 atomic_set(&pool->available, 0);
240 pool->next_alloc = 0;
241 pool->next_free = 0;
242
243 return 0;
244 }
245
246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
247 struct ibmvnic_rx_pool *pool)
248 {
249 int count = pool->size - atomic_read(&pool->available);
250 struct device *dev = &adapter->vdev->dev;
251 int buffers_added = 0;
252 unsigned long lpar_rc;
253 union sub_crq sub_crq;
254 struct sk_buff *skb;
255 unsigned int offset;
256 dma_addr_t dma_addr;
257 unsigned char *dst;
258 u64 *handle_array;
259 int shift = 0;
260 int index;
261 int i;
262
263 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
264 be32_to_cpu(adapter->login_rsp_buf->
265 off_rxadd_subcrqs));
266
267 for (i = 0; i < count; ++i) {
268 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
269 if (!skb) {
270 dev_err(dev, "Couldn't replenish rx buff\n");
271 adapter->replenish_no_mem++;
272 break;
273 }
274
275 index = pool->free_map[pool->next_free];
276
277 if (pool->rx_buff[index].skb)
278 dev_err(dev, "Inconsistent free_map!\n");
279
280 /* Copy the skb to the long term mapped DMA buffer */
281 offset = index * pool->buff_size;
282 dst = pool->long_term_buff.buff + offset;
283 memset(dst, 0, pool->buff_size);
284 dma_addr = pool->long_term_buff.addr + offset;
285 pool->rx_buff[index].data = dst;
286
287 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
288 pool->rx_buff[index].dma = dma_addr;
289 pool->rx_buff[index].skb = skb;
290 pool->rx_buff[index].pool_index = pool->index;
291 pool->rx_buff[index].size = pool->buff_size;
292
293 memset(&sub_crq, 0, sizeof(sub_crq));
294 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
295 sub_crq.rx_add.correlator =
296 cpu_to_be64((u64)&pool->rx_buff[index]);
297 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
298 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
299
300 /* The length field of the sCRQ is defined to be 24 bits so the
301 * buffer size needs to be left shifted by a byte before it is
302 * converted to big endian to prevent the last byte from being
303 * truncated.
304 */
305 #ifdef __LITTLE_ENDIAN__
306 shift = 8;
307 #endif
308 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
309
310 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
311 &sub_crq);
312 if (lpar_rc != H_SUCCESS)
313 goto failure;
314
315 buffers_added++;
316 adapter->replenish_add_buff_success++;
317 pool->next_free = (pool->next_free + 1) % pool->size;
318 }
319 atomic_add(buffers_added, &pool->available);
320 return;
321
322 failure:
323 dev_info(dev, "replenish pools failure\n");
324 pool->free_map[pool->next_free] = index;
325 pool->rx_buff[index].skb = NULL;
326 if (!dma_mapping_error(dev, dma_addr))
327 dma_unmap_single(dev, dma_addr, pool->buff_size,
328 DMA_FROM_DEVICE);
329
330 dev_kfree_skb_any(skb);
331 adapter->replenish_add_buff_failure++;
332 atomic_add(buffers_added, &pool->available);
333 }
334
335 static void replenish_pools(struct ibmvnic_adapter *adapter)
336 {
337 int i;
338
339 if (adapter->migrated)
340 return;
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
350 static void free_rx_pool(struct ibmvnic_adapter *adapter,
351 struct ibmvnic_rx_pool *pool)
352 {
353 int i;
354
355 kfree(pool->free_map);
356 pool->free_map = NULL;
357
358 if (!pool->rx_buff)
359 return;
360
361 for (i = 0; i < pool->size; i++) {
362 if (pool->rx_buff[i].skb) {
363 dev_kfree_skb_any(pool->rx_buff[i].skb);
364 pool->rx_buff[i].skb = NULL;
365 }
366 }
367 kfree(pool->rx_buff);
368 pool->rx_buff = NULL;
369 }
370
371 static int ibmvnic_open(struct net_device *netdev)
372 {
373 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
374 struct device *dev = &adapter->vdev->dev;
375 struct ibmvnic_tx_pool *tx_pool;
376 union ibmvnic_crq crq;
377 int rxadd_subcrqs;
378 u64 *size_array;
379 int tx_subcrqs;
380 int i, j;
381
382 rxadd_subcrqs =
383 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
384 tx_subcrqs =
385 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
386 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
387 be32_to_cpu(adapter->login_rsp_buf->
388 off_rxadd_buff_size));
389 adapter->map_id = 1;
390 adapter->napi = kcalloc(adapter->req_rx_queues,
391 sizeof(struct napi_struct), GFP_KERNEL);
392 if (!adapter->napi)
393 goto alloc_napi_failed;
394 for (i = 0; i < adapter->req_rx_queues; i++) {
395 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
396 NAPI_POLL_WEIGHT);
397 napi_enable(&adapter->napi[i]);
398 }
399 adapter->rx_pool =
400 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
401
402 if (!adapter->rx_pool)
403 goto rx_pool_arr_alloc_failed;
404 send_map_query(adapter);
405 for (i = 0; i < rxadd_subcrqs; i++) {
406 init_rx_pool(adapter, &adapter->rx_pool[i],
407 IBMVNIC_BUFFS_PER_POOL, i,
408 be64_to_cpu(size_array[i]), 1);
409 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
410 dev_err(dev, "Couldn't alloc rx pool\n");
411 goto rx_pool_alloc_failed;
412 }
413 }
414 adapter->tx_pool =
415 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
416
417 if (!adapter->tx_pool)
418 goto tx_pool_arr_alloc_failed;
419 for (i = 0; i < tx_subcrqs; i++) {
420 tx_pool = &adapter->tx_pool[i];
421 tx_pool->tx_buff =
422 kcalloc(adapter->max_tx_entries_per_subcrq,
423 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
424 if (!tx_pool->tx_buff)
425 goto tx_pool_alloc_failed;
426
427 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
428 adapter->max_tx_entries_per_subcrq *
429 adapter->req_mtu))
430 goto tx_ltb_alloc_failed;
431
432 tx_pool->free_map =
433 kcalloc(adapter->max_tx_entries_per_subcrq,
434 sizeof(int), GFP_KERNEL);
435 if (!tx_pool->free_map)
436 goto tx_fm_alloc_failed;
437
438 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
439 tx_pool->free_map[j] = j;
440
441 tx_pool->consumer_index = 0;
442 tx_pool->producer_index = 0;
443 }
444 adapter->bounce_buffer_size =
445 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
446 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
447 GFP_KERNEL);
448 if (!adapter->bounce_buffer)
449 goto bounce_alloc_failed;
450
451 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
452 adapter->bounce_buffer_size,
453 DMA_TO_DEVICE);
454 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
455 dev_err(dev, "Couldn't map tx bounce buffer\n");
456 goto bounce_map_failed;
457 }
458 replenish_pools(adapter);
459
460 /* We're ready to receive frames, enable the sub-crq interrupts and
461 * set the logical link state to up
462 */
463 for (i = 0; i < adapter->req_rx_queues; i++)
464 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
465
466 for (i = 0; i < adapter->req_tx_queues; i++)
467 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
468
469 memset(&crq, 0, sizeof(crq));
470 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
471 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
472 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
473 ibmvnic_send_crq(adapter, &crq);
474
475 netif_tx_start_all_queues(netdev);
476
477 return 0;
478
479 bounce_map_failed:
480 kfree(adapter->bounce_buffer);
481 bounce_alloc_failed:
482 i = tx_subcrqs - 1;
483 kfree(adapter->tx_pool[i].free_map);
484 tx_fm_alloc_failed:
485 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
486 tx_ltb_alloc_failed:
487 kfree(adapter->tx_pool[i].tx_buff);
488 tx_pool_alloc_failed:
489 for (j = 0; j < i; j++) {
490 kfree(adapter->tx_pool[j].tx_buff);
491 free_long_term_buff(adapter,
492 &adapter->tx_pool[j].long_term_buff);
493 kfree(adapter->tx_pool[j].free_map);
494 }
495 kfree(adapter->tx_pool);
496 adapter->tx_pool = NULL;
497 tx_pool_arr_alloc_failed:
498 i = rxadd_subcrqs;
499 rx_pool_alloc_failed:
500 for (j = 0; j < i; j++) {
501 free_rx_pool(adapter, &adapter->rx_pool[j]);
502 free_long_term_buff(adapter,
503 &adapter->rx_pool[j].long_term_buff);
504 }
505 kfree(adapter->rx_pool);
506 adapter->rx_pool = NULL;
507 rx_pool_arr_alloc_failed:
508 for (i = 0; i < adapter->req_rx_queues; i++)
509 napi_disable(&adapter->napi[i]);
510 alloc_napi_failed:
511 return -ENOMEM;
512 }
513
514 static int ibmvnic_close(struct net_device *netdev)
515 {
516 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
517 struct device *dev = &adapter->vdev->dev;
518 union ibmvnic_crq crq;
519 int i;
520
521 adapter->closing = true;
522
523 for (i = 0; i < adapter->req_rx_queues; i++)
524 napi_disable(&adapter->napi[i]);
525
526 if (!adapter->failover)
527 netif_tx_stop_all_queues(netdev);
528
529 if (adapter->bounce_buffer) {
530 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
531 dma_unmap_single(&adapter->vdev->dev,
532 adapter->bounce_buffer_dma,
533 adapter->bounce_buffer_size,
534 DMA_BIDIRECTIONAL);
535 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
536 }
537 kfree(adapter->bounce_buffer);
538 adapter->bounce_buffer = NULL;
539 }
540
541 memset(&crq, 0, sizeof(crq));
542 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
543 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
544 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
545 ibmvnic_send_crq(adapter, &crq);
546
547 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
548 i++) {
549 kfree(adapter->tx_pool[i].tx_buff);
550 free_long_term_buff(adapter,
551 &adapter->tx_pool[i].long_term_buff);
552 kfree(adapter->tx_pool[i].free_map);
553 }
554 kfree(adapter->tx_pool);
555 adapter->tx_pool = NULL;
556
557 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
558 i++) {
559 free_rx_pool(adapter, &adapter->rx_pool[i]);
560 free_long_term_buff(adapter,
561 &adapter->rx_pool[i].long_term_buff);
562 }
563 kfree(adapter->rx_pool);
564 adapter->rx_pool = NULL;
565
566 adapter->closing = false;
567
568 return 0;
569 }
570
571 /**
572 * build_hdr_data - creates L2/L3/L4 header data buffer
573 * @hdr_field - bitfield determining needed headers
574 * @skb - socket buffer
575 * @hdr_len - array of header lengths
576 * @tot_len - total length of data
577 *
578 * Reads hdr_field to determine which headers are needed by firmware.
579 * Builds a buffer containing these headers. Saves individual header
580 * lengths and total buffer length to be used to build descriptors.
581 */
582 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
583 int *hdr_len, u8 *hdr_data)
584 {
585 int len = 0;
586 u8 *hdr;
587
588 hdr_len[0] = sizeof(struct ethhdr);
589
590 if (skb->protocol == htons(ETH_P_IP)) {
591 hdr_len[1] = ip_hdr(skb)->ihl * 4;
592 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
593 hdr_len[2] = tcp_hdrlen(skb);
594 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
595 hdr_len[2] = sizeof(struct udphdr);
596 } else if (skb->protocol == htons(ETH_P_IPV6)) {
597 hdr_len[1] = sizeof(struct ipv6hdr);
598 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
599 hdr_len[2] = tcp_hdrlen(skb);
600 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
601 hdr_len[2] = sizeof(struct udphdr);
602 }
603
604 memset(hdr_data, 0, 120);
605 if ((hdr_field >> 6) & 1) {
606 hdr = skb_mac_header(skb);
607 memcpy(hdr_data, hdr, hdr_len[0]);
608 len += hdr_len[0];
609 }
610
611 if ((hdr_field >> 5) & 1) {
612 hdr = skb_network_header(skb);
613 memcpy(hdr_data + len, hdr, hdr_len[1]);
614 len += hdr_len[1];
615 }
616
617 if ((hdr_field >> 4) & 1) {
618 hdr = skb_transport_header(skb);
619 memcpy(hdr_data + len, hdr, hdr_len[2]);
620 len += hdr_len[2];
621 }
622 return len;
623 }
624
625 /**
626 * create_hdr_descs - create header and header extension descriptors
627 * @hdr_field - bitfield determining needed headers
628 * @data - buffer containing header data
629 * @len - length of data buffer
630 * @hdr_len - array of individual header lengths
631 * @scrq_arr - descriptor array
632 *
633 * Creates header and, if needed, header extension descriptors and
634 * places them in a descriptor array, scrq_arr
635 */
636
637 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
638 union sub_crq *scrq_arr)
639 {
640 union sub_crq hdr_desc;
641 int tmp_len = len;
642 u8 *data, *cur;
643 int tmp;
644
645 while (tmp_len > 0) {
646 cur = hdr_data + len - tmp_len;
647
648 memset(&hdr_desc, 0, sizeof(hdr_desc));
649 if (cur != hdr_data) {
650 data = hdr_desc.hdr_ext.data;
651 tmp = tmp_len > 29 ? 29 : tmp_len;
652 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
653 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
654 hdr_desc.hdr_ext.len = tmp;
655 } else {
656 data = hdr_desc.hdr.data;
657 tmp = tmp_len > 24 ? 24 : tmp_len;
658 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
659 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
660 hdr_desc.hdr.len = tmp;
661 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
662 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
663 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
664 hdr_desc.hdr.flag = hdr_field << 1;
665 }
666 memcpy(data, cur, tmp);
667 tmp_len -= tmp;
668 *scrq_arr = hdr_desc;
669 scrq_arr++;
670 }
671 }
672
673 /**
674 * build_hdr_descs_arr - build a header descriptor array
675 * @skb - socket buffer
676 * @num_entries - number of descriptors to be sent
677 * @subcrq - first TX descriptor
678 * @hdr_field - bit field determining which headers will be sent
679 *
680 * This function will build a TX descriptor array with applicable
681 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
682 */
683
684 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
685 int *num_entries, u8 hdr_field)
686 {
687 int hdr_len[3] = {0, 0, 0};
688 int tot_len, len;
689 u8 *hdr_data = txbuff->hdr_data;
690
691 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
692 txbuff->hdr_data);
693 len = tot_len;
694 len -= 24;
695 if (len > 0)
696 num_entries += len % 29 ? len / 29 + 1 : len / 29;
697 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
698 txbuff->indir_arr + 1);
699 }
700
701 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
702 {
703 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
704 int queue_num = skb_get_queue_mapping(skb);
705 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
706 struct device *dev = &adapter->vdev->dev;
707 struct ibmvnic_tx_buff *tx_buff = NULL;
708 struct ibmvnic_tx_pool *tx_pool;
709 unsigned int tx_send_failed = 0;
710 unsigned int tx_map_failed = 0;
711 unsigned int tx_dropped = 0;
712 unsigned int tx_packets = 0;
713 unsigned int tx_bytes = 0;
714 dma_addr_t data_dma_addr;
715 struct netdev_queue *txq;
716 bool used_bounce = false;
717 unsigned long lpar_rc;
718 union sub_crq tx_crq;
719 unsigned int offset;
720 int num_entries = 1;
721 unsigned char *dst;
722 u64 *handle_array;
723 int index = 0;
724 int ret = 0;
725
726 tx_pool = &adapter->tx_pool[queue_num];
727 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
728 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
729 be32_to_cpu(adapter->login_rsp_buf->
730 off_txsubm_subcrqs));
731 if (adapter->migrated) {
732 tx_send_failed++;
733 tx_dropped++;
734 ret = NETDEV_TX_BUSY;
735 goto out;
736 }
737
738 index = tx_pool->free_map[tx_pool->consumer_index];
739 offset = index * adapter->req_mtu;
740 dst = tx_pool->long_term_buff.buff + offset;
741 memset(dst, 0, adapter->req_mtu);
742 skb_copy_from_linear_data(skb, dst, skb->len);
743 data_dma_addr = tx_pool->long_term_buff.addr + offset;
744
745 tx_pool->consumer_index =
746 (tx_pool->consumer_index + 1) %
747 adapter->max_tx_entries_per_subcrq;
748
749 tx_buff = &tx_pool->tx_buff[index];
750 tx_buff->skb = skb;
751 tx_buff->data_dma[0] = data_dma_addr;
752 tx_buff->data_len[0] = skb->len;
753 tx_buff->index = index;
754 tx_buff->pool_index = queue_num;
755 tx_buff->last_frag = true;
756 tx_buff->used_bounce = used_bounce;
757
758 memset(&tx_crq, 0, sizeof(tx_crq));
759 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
760 tx_crq.v1.type = IBMVNIC_TX_DESC;
761 tx_crq.v1.n_crq_elem = 1;
762 tx_crq.v1.n_sge = 1;
763 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
764 tx_crq.v1.correlator = cpu_to_be32(index);
765 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
766 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
767 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
768
769 if (adapter->vlan_header_insertion) {
770 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
771 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
772 }
773
774 if (skb->protocol == htons(ETH_P_IP)) {
775 if (ip_hdr(skb)->version == 4)
776 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
777 else if (ip_hdr(skb)->version == 6)
778 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
779
780 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
781 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
782 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
783 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
784 }
785
786 if (skb->ip_summed == CHECKSUM_PARTIAL) {
787 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
788 hdrs += 2;
789 }
790 /* determine if l2/3/4 headers are sent to firmware */
791 if ((*hdrs >> 7) & 1 &&
792 (skb->protocol == htons(ETH_P_IP) ||
793 skb->protocol == htons(ETH_P_IPV6))) {
794 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
795 tx_crq.v1.n_crq_elem = num_entries;
796 tx_buff->indir_arr[0] = tx_crq;
797 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
798 sizeof(tx_buff->indir_arr),
799 DMA_TO_DEVICE);
800 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
801 if (!firmware_has_feature(FW_FEATURE_CMO))
802 dev_err(dev, "tx: unable to map descriptor array\n");
803 tx_map_failed++;
804 tx_dropped++;
805 ret = NETDEV_TX_BUSY;
806 goto out;
807 }
808 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
809 (u64)tx_buff->indir_dma,
810 (u64)num_entries);
811 } else {
812 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
813 &tx_crq);
814 }
815 if (lpar_rc != H_SUCCESS) {
816 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
817
818 if (tx_pool->consumer_index == 0)
819 tx_pool->consumer_index =
820 adapter->max_tx_entries_per_subcrq - 1;
821 else
822 tx_pool->consumer_index--;
823
824 tx_send_failed++;
825 tx_dropped++;
826 ret = NETDEV_TX_BUSY;
827 goto out;
828 }
829 tx_packets++;
830 tx_bytes += skb->len;
831 txq->trans_start = jiffies;
832 ret = NETDEV_TX_OK;
833
834 out:
835 netdev->stats.tx_dropped += tx_dropped;
836 netdev->stats.tx_bytes += tx_bytes;
837 netdev->stats.tx_packets += tx_packets;
838 adapter->tx_send_failed += tx_send_failed;
839 adapter->tx_map_failed += tx_map_failed;
840
841 return ret;
842 }
843
844 static void ibmvnic_set_multi(struct net_device *netdev)
845 {
846 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
847 struct netdev_hw_addr *ha;
848 union ibmvnic_crq crq;
849
850 memset(&crq, 0, sizeof(crq));
851 crq.request_capability.first = IBMVNIC_CRQ_CMD;
852 crq.request_capability.cmd = REQUEST_CAPABILITY;
853
854 if (netdev->flags & IFF_PROMISC) {
855 if (!adapter->promisc_supported)
856 return;
857 } else {
858 if (netdev->flags & IFF_ALLMULTI) {
859 /* Accept all multicast */
860 memset(&crq, 0, sizeof(crq));
861 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
862 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
863 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
864 ibmvnic_send_crq(adapter, &crq);
865 } else if (netdev_mc_empty(netdev)) {
866 /* Reject all multicast */
867 memset(&crq, 0, sizeof(crq));
868 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
869 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
870 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
871 ibmvnic_send_crq(adapter, &crq);
872 } else {
873 /* Accept one or more multicast(s) */
874 netdev_for_each_mc_addr(ha, netdev) {
875 memset(&crq, 0, sizeof(crq));
876 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
877 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
878 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
879 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
880 ha->addr);
881 ibmvnic_send_crq(adapter, &crq);
882 }
883 }
884 }
885 }
886
887 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
888 {
889 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
890 struct sockaddr *addr = p;
891 union ibmvnic_crq crq;
892
893 if (!is_valid_ether_addr(addr->sa_data))
894 return -EADDRNOTAVAIL;
895
896 memset(&crq, 0, sizeof(crq));
897 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
898 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
899 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
900 ibmvnic_send_crq(adapter, &crq);
901 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
902 return 0;
903 }
904
905 static void ibmvnic_tx_timeout(struct net_device *dev)
906 {
907 struct ibmvnic_adapter *adapter = netdev_priv(dev);
908 int rc;
909
910 /* Adapter timed out, resetting it */
911 release_sub_crqs(adapter);
912 rc = ibmvnic_reset_crq(adapter);
913 if (rc)
914 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
915 else
916 ibmvnic_send_crq_init(adapter);
917 }
918
919 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
920 struct ibmvnic_rx_buff *rx_buff)
921 {
922 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
923
924 rx_buff->skb = NULL;
925
926 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
927 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
928
929 atomic_dec(&pool->available);
930 }
931
932 static int ibmvnic_poll(struct napi_struct *napi, int budget)
933 {
934 struct net_device *netdev = napi->dev;
935 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
936 int scrq_num = (int)(napi - adapter->napi);
937 int frames_processed = 0;
938 restart_poll:
939 while (frames_processed < budget) {
940 struct sk_buff *skb;
941 struct ibmvnic_rx_buff *rx_buff;
942 union sub_crq *next;
943 u32 length;
944 u16 offset;
945 u8 flags = 0;
946
947 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
948 break;
949 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
950 rx_buff =
951 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
952 rx_comp.correlator);
953 /* do error checking */
954 if (next->rx_comp.rc) {
955 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
956 /* free the entry */
957 next->rx_comp.first = 0;
958 remove_buff_from_pool(adapter, rx_buff);
959 break;
960 }
961
962 length = be32_to_cpu(next->rx_comp.len);
963 offset = be16_to_cpu(next->rx_comp.off_frame_data);
964 flags = next->rx_comp.flags;
965 skb = rx_buff->skb;
966 skb_copy_to_linear_data(skb, rx_buff->data + offset,
967 length);
968 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
969 /* free the entry */
970 next->rx_comp.first = 0;
971 remove_buff_from_pool(adapter, rx_buff);
972
973 skb_put(skb, length);
974 skb->protocol = eth_type_trans(skb, netdev);
975
976 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
977 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
978 skb->ip_summed = CHECKSUM_UNNECESSARY;
979 }
980
981 length = skb->len;
982 napi_gro_receive(napi, skb); /* send it up */
983 netdev->stats.rx_packets++;
984 netdev->stats.rx_bytes += length;
985 frames_processed++;
986 }
987 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
988
989 if (frames_processed < budget) {
990 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
991 napi_complete_done(napi, frames_processed);
992 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
993 napi_reschedule(napi)) {
994 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
995 goto restart_poll;
996 }
997 }
998 return frames_processed;
999 }
1000
1001 #ifdef CONFIG_NET_POLL_CONTROLLER
1002 static void ibmvnic_netpoll_controller(struct net_device *dev)
1003 {
1004 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1005 int i;
1006
1007 replenish_pools(netdev_priv(dev));
1008 for (i = 0; i < adapter->req_rx_queues; i++)
1009 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1010 adapter->rx_scrq[i]);
1011 }
1012 #endif
1013
1014 static const struct net_device_ops ibmvnic_netdev_ops = {
1015 .ndo_open = ibmvnic_open,
1016 .ndo_stop = ibmvnic_close,
1017 .ndo_start_xmit = ibmvnic_xmit,
1018 .ndo_set_rx_mode = ibmvnic_set_multi,
1019 .ndo_set_mac_address = ibmvnic_set_mac,
1020 .ndo_validate_addr = eth_validate_addr,
1021 .ndo_tx_timeout = ibmvnic_tx_timeout,
1022 #ifdef CONFIG_NET_POLL_CONTROLLER
1023 .ndo_poll_controller = ibmvnic_netpoll_controller,
1024 #endif
1025 };
1026
1027 /* ethtool functions */
1028
1029 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1030 struct ethtool_link_ksettings *cmd)
1031 {
1032 u32 supported, advertising;
1033
1034 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1035 SUPPORTED_FIBRE);
1036 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1037 ADVERTISED_FIBRE);
1038 cmd->base.speed = SPEED_1000;
1039 cmd->base.duplex = DUPLEX_FULL;
1040 cmd->base.port = PORT_FIBRE;
1041 cmd->base.phy_address = 0;
1042 cmd->base.autoneg = AUTONEG_ENABLE;
1043
1044 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1045 supported);
1046 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1047 advertising);
1048
1049 return 0;
1050 }
1051
1052 static void ibmvnic_get_drvinfo(struct net_device *dev,
1053 struct ethtool_drvinfo *info)
1054 {
1055 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1056 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1057 }
1058
1059 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1060 {
1061 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1062
1063 return adapter->msg_enable;
1064 }
1065
1066 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1067 {
1068 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1069
1070 adapter->msg_enable = data;
1071 }
1072
1073 static u32 ibmvnic_get_link(struct net_device *netdev)
1074 {
1075 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1076
1077 /* Don't need to send a query because we request a logical link up at
1078 * init and then we wait for link state indications
1079 */
1080 return adapter->logical_link_state;
1081 }
1082
1083 static void ibmvnic_get_ringparam(struct net_device *netdev,
1084 struct ethtool_ringparam *ring)
1085 {
1086 ring->rx_max_pending = 0;
1087 ring->tx_max_pending = 0;
1088 ring->rx_mini_max_pending = 0;
1089 ring->rx_jumbo_max_pending = 0;
1090 ring->rx_pending = 0;
1091 ring->tx_pending = 0;
1092 ring->rx_mini_pending = 0;
1093 ring->rx_jumbo_pending = 0;
1094 }
1095
1096 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1097 {
1098 int i;
1099
1100 if (stringset != ETH_SS_STATS)
1101 return;
1102
1103 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1104 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1105 }
1106
1107 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1108 {
1109 switch (sset) {
1110 case ETH_SS_STATS:
1111 return ARRAY_SIZE(ibmvnic_stats);
1112 default:
1113 return -EOPNOTSUPP;
1114 }
1115 }
1116
1117 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1118 struct ethtool_stats *stats, u64 *data)
1119 {
1120 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1121 union ibmvnic_crq crq;
1122 int i;
1123
1124 memset(&crq, 0, sizeof(crq));
1125 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1126 crq.request_statistics.cmd = REQUEST_STATISTICS;
1127 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1128 crq.request_statistics.len =
1129 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1130
1131 /* Wait for data to be written */
1132 init_completion(&adapter->stats_done);
1133 ibmvnic_send_crq(adapter, &crq);
1134 wait_for_completion(&adapter->stats_done);
1135
1136 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1137 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1138 }
1139
1140 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1141 .get_drvinfo = ibmvnic_get_drvinfo,
1142 .get_msglevel = ibmvnic_get_msglevel,
1143 .set_msglevel = ibmvnic_set_msglevel,
1144 .get_link = ibmvnic_get_link,
1145 .get_ringparam = ibmvnic_get_ringparam,
1146 .get_strings = ibmvnic_get_strings,
1147 .get_sset_count = ibmvnic_get_sset_count,
1148 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1149 .get_link_ksettings = ibmvnic_get_link_ksettings,
1150 };
1151
1152 /* Routines for managing CRQs/sCRQs */
1153
1154 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1155 struct ibmvnic_sub_crq_queue *scrq)
1156 {
1157 struct device *dev = &adapter->vdev->dev;
1158 long rc;
1159
1160 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1161
1162 /* Close the sub-crqs */
1163 do {
1164 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1165 adapter->vdev->unit_address,
1166 scrq->crq_num);
1167 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1168
1169 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1170 DMA_BIDIRECTIONAL);
1171 free_pages((unsigned long)scrq->msgs, 2);
1172 kfree(scrq);
1173 }
1174
1175 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1176 *adapter)
1177 {
1178 struct device *dev = &adapter->vdev->dev;
1179 struct ibmvnic_sub_crq_queue *scrq;
1180 int rc;
1181
1182 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1183 if (!scrq)
1184 return NULL;
1185
1186 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1187 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1188 if (!scrq->msgs) {
1189 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1190 goto zero_page_failed;
1191 }
1192
1193 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1194 DMA_BIDIRECTIONAL);
1195 if (dma_mapping_error(dev, scrq->msg_token)) {
1196 dev_warn(dev, "Couldn't map crq queue messages page\n");
1197 goto map_failed;
1198 }
1199
1200 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1201 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1202
1203 if (rc == H_RESOURCE)
1204 rc = ibmvnic_reset_crq(adapter);
1205
1206 if (rc == H_CLOSED) {
1207 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1208 } else if (rc) {
1209 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1210 goto reg_failed;
1211 }
1212
1213 scrq->adapter = adapter;
1214 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1215 scrq->cur = 0;
1216 scrq->rx_skb_top = NULL;
1217 spin_lock_init(&scrq->lock);
1218
1219 netdev_dbg(adapter->netdev,
1220 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1221 scrq->crq_num, scrq->hw_irq, scrq->irq);
1222
1223 return scrq;
1224
1225 reg_failed:
1226 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1227 DMA_BIDIRECTIONAL);
1228 map_failed:
1229 free_pages((unsigned long)scrq->msgs, 2);
1230 zero_page_failed:
1231 kfree(scrq);
1232
1233 return NULL;
1234 }
1235
1236 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1237 {
1238 int i;
1239
1240 if (adapter->tx_scrq) {
1241 for (i = 0; i < adapter->req_tx_queues; i++)
1242 if (adapter->tx_scrq[i]) {
1243 free_irq(adapter->tx_scrq[i]->irq,
1244 adapter->tx_scrq[i]);
1245 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1246 release_sub_crq_queue(adapter,
1247 adapter->tx_scrq[i]);
1248 }
1249 adapter->tx_scrq = NULL;
1250 }
1251
1252 if (adapter->rx_scrq) {
1253 for (i = 0; i < adapter->req_rx_queues; i++)
1254 if (adapter->rx_scrq[i]) {
1255 free_irq(adapter->rx_scrq[i]->irq,
1256 adapter->rx_scrq[i]);
1257 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1258 release_sub_crq_queue(adapter,
1259 adapter->rx_scrq[i]);
1260 }
1261 adapter->rx_scrq = NULL;
1262 }
1263 }
1264
1265 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1266 {
1267 int i;
1268
1269 if (adapter->tx_scrq) {
1270 for (i = 0; i < adapter->req_tx_queues; i++)
1271 if (adapter->tx_scrq[i])
1272 release_sub_crq_queue(adapter,
1273 adapter->tx_scrq[i]);
1274 adapter->tx_scrq = NULL;
1275 }
1276
1277 if (adapter->rx_scrq) {
1278 for (i = 0; i < adapter->req_rx_queues; i++)
1279 if (adapter->rx_scrq[i])
1280 release_sub_crq_queue(adapter,
1281 adapter->rx_scrq[i]);
1282 adapter->rx_scrq = NULL;
1283 }
1284 }
1285
1286 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1287 struct ibmvnic_sub_crq_queue *scrq)
1288 {
1289 struct device *dev = &adapter->vdev->dev;
1290 unsigned long rc;
1291
1292 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1293 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1294 if (rc)
1295 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1296 scrq->hw_irq, rc);
1297 return rc;
1298 }
1299
1300 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1301 struct ibmvnic_sub_crq_queue *scrq)
1302 {
1303 struct device *dev = &adapter->vdev->dev;
1304 unsigned long rc;
1305
1306 if (scrq->hw_irq > 0x100000000ULL) {
1307 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1308 return 1;
1309 }
1310
1311 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1312 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1313 if (rc)
1314 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1315 scrq->hw_irq, rc);
1316 return rc;
1317 }
1318
1319 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1320 struct ibmvnic_sub_crq_queue *scrq)
1321 {
1322 struct device *dev = &adapter->vdev->dev;
1323 struct ibmvnic_tx_buff *txbuff;
1324 union sub_crq *next;
1325 int index;
1326 int i, j;
1327 u8 first;
1328
1329 restart_loop:
1330 while (pending_scrq(adapter, scrq)) {
1331 unsigned int pool = scrq->pool_index;
1332
1333 next = ibmvnic_next_scrq(adapter, scrq);
1334 for (i = 0; i < next->tx_comp.num_comps; i++) {
1335 if (next->tx_comp.rcs[i]) {
1336 dev_err(dev, "tx error %x\n",
1337 next->tx_comp.rcs[i]);
1338 continue;
1339 }
1340 index = be32_to_cpu(next->tx_comp.correlators[i]);
1341 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1342
1343 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1344 if (!txbuff->data_dma[j])
1345 continue;
1346
1347 txbuff->data_dma[j] = 0;
1348 txbuff->used_bounce = false;
1349 }
1350 /* if sub_crq was sent indirectly */
1351 first = txbuff->indir_arr[0].generic.first;
1352 if (first == IBMVNIC_CRQ_CMD) {
1353 dma_unmap_single(dev, txbuff->indir_dma,
1354 sizeof(txbuff->indir_arr),
1355 DMA_TO_DEVICE);
1356 }
1357
1358 if (txbuff->last_frag)
1359 dev_kfree_skb_any(txbuff->skb);
1360
1361 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1362 producer_index] = index;
1363 adapter->tx_pool[pool].producer_index =
1364 (adapter->tx_pool[pool].producer_index + 1) %
1365 adapter->max_tx_entries_per_subcrq;
1366 }
1367 /* remove tx_comp scrq*/
1368 next->tx_comp.first = 0;
1369 }
1370
1371 enable_scrq_irq(adapter, scrq);
1372
1373 if (pending_scrq(adapter, scrq)) {
1374 disable_scrq_irq(adapter, scrq);
1375 goto restart_loop;
1376 }
1377
1378 return 0;
1379 }
1380
1381 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1382 {
1383 struct ibmvnic_sub_crq_queue *scrq = instance;
1384 struct ibmvnic_adapter *adapter = scrq->adapter;
1385
1386 disable_scrq_irq(adapter, scrq);
1387 ibmvnic_complete_tx(adapter, scrq);
1388
1389 return IRQ_HANDLED;
1390 }
1391
1392 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1393 {
1394 struct ibmvnic_sub_crq_queue *scrq = instance;
1395 struct ibmvnic_adapter *adapter = scrq->adapter;
1396
1397 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1398 disable_scrq_irq(adapter, scrq);
1399 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1400 }
1401
1402 return IRQ_HANDLED;
1403 }
1404
1405 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1406 {
1407 struct device *dev = &adapter->vdev->dev;
1408 struct ibmvnic_sub_crq_queue *scrq;
1409 int i = 0, j = 0;
1410 int rc = 0;
1411
1412 for (i = 0; i < adapter->req_tx_queues; i++) {
1413 scrq = adapter->tx_scrq[i];
1414 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1415
1416 if (!scrq->irq) {
1417 rc = -EINVAL;
1418 dev_err(dev, "Error mapping irq\n");
1419 goto req_tx_irq_failed;
1420 }
1421
1422 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1423 0, "ibmvnic_tx", scrq);
1424
1425 if (rc) {
1426 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1427 scrq->irq, rc);
1428 irq_dispose_mapping(scrq->irq);
1429 goto req_rx_irq_failed;
1430 }
1431 }
1432
1433 for (i = 0; i < adapter->req_rx_queues; i++) {
1434 scrq = adapter->rx_scrq[i];
1435 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1436 if (!scrq->irq) {
1437 rc = -EINVAL;
1438 dev_err(dev, "Error mapping irq\n");
1439 goto req_rx_irq_failed;
1440 }
1441 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1442 0, "ibmvnic_rx", scrq);
1443 if (rc) {
1444 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1445 scrq->irq, rc);
1446 irq_dispose_mapping(scrq->irq);
1447 goto req_rx_irq_failed;
1448 }
1449 }
1450 return rc;
1451
1452 req_rx_irq_failed:
1453 for (j = 0; j < i; j++) {
1454 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1455 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1456 }
1457 i = adapter->req_tx_queues;
1458 req_tx_irq_failed:
1459 for (j = 0; j < i; j++) {
1460 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1461 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1462 }
1463 release_sub_crqs_no_irqs(adapter);
1464 return rc;
1465 }
1466
1467 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1468 {
1469 struct device *dev = &adapter->vdev->dev;
1470 struct ibmvnic_sub_crq_queue **allqueues;
1471 int registered_queues = 0;
1472 union ibmvnic_crq crq;
1473 int total_queues;
1474 int more = 0;
1475 int i;
1476
1477 if (!retry) {
1478 /* Sub-CRQ entries are 32 byte long */
1479 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1480
1481 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1482 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1483 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1484 goto allqueues_failed;
1485 }
1486
1487 /* Get the minimum between the queried max and the entries
1488 * that fit in our PAGE_SIZE
1489 */
1490 adapter->req_tx_entries_per_subcrq =
1491 adapter->max_tx_entries_per_subcrq > entries_page ?
1492 entries_page : adapter->max_tx_entries_per_subcrq;
1493 adapter->req_rx_add_entries_per_subcrq =
1494 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1495 entries_page : adapter->max_rx_add_entries_per_subcrq;
1496
1497 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1498 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1499 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1500
1501 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
1502 }
1503
1504 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1505
1506 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1507 if (!allqueues)
1508 goto allqueues_failed;
1509
1510 for (i = 0; i < total_queues; i++) {
1511 allqueues[i] = init_sub_crq_queue(adapter);
1512 if (!allqueues[i]) {
1513 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1514 break;
1515 }
1516 registered_queues++;
1517 }
1518
1519 /* Make sure we were able to register the minimum number of queues */
1520 if (registered_queues <
1521 adapter->min_tx_queues + adapter->min_rx_queues) {
1522 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1523 goto tx_failed;
1524 }
1525
1526 /* Distribute the failed allocated queues*/
1527 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1528 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1529 switch (i % 3) {
1530 case 0:
1531 if (adapter->req_rx_queues > adapter->min_rx_queues)
1532 adapter->req_rx_queues--;
1533 else
1534 more++;
1535 break;
1536 case 1:
1537 if (adapter->req_tx_queues > adapter->min_tx_queues)
1538 adapter->req_tx_queues--;
1539 else
1540 more++;
1541 break;
1542 }
1543 }
1544
1545 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1546 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1547 if (!adapter->tx_scrq)
1548 goto tx_failed;
1549
1550 for (i = 0; i < adapter->req_tx_queues; i++) {
1551 adapter->tx_scrq[i] = allqueues[i];
1552 adapter->tx_scrq[i]->pool_index = i;
1553 }
1554
1555 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1556 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1557 if (!adapter->rx_scrq)
1558 goto rx_failed;
1559
1560 for (i = 0; i < adapter->req_rx_queues; i++) {
1561 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1562 adapter->rx_scrq[i]->scrq_num = i;
1563 }
1564
1565 memset(&crq, 0, sizeof(crq));
1566 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1567 crq.request_capability.cmd = REQUEST_CAPABILITY;
1568
1569 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1570 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1571 atomic_inc(&adapter->running_cap_crqs);
1572 ibmvnic_send_crq(adapter, &crq);
1573
1574 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1575 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1576 atomic_inc(&adapter->running_cap_crqs);
1577 ibmvnic_send_crq(adapter, &crq);
1578
1579 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1580 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1581 atomic_inc(&adapter->running_cap_crqs);
1582 ibmvnic_send_crq(adapter, &crq);
1583
1584 crq.request_capability.capability =
1585 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1586 crq.request_capability.number =
1587 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1588 atomic_inc(&adapter->running_cap_crqs);
1589 ibmvnic_send_crq(adapter, &crq);
1590
1591 crq.request_capability.capability =
1592 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1593 crq.request_capability.number =
1594 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1595 atomic_inc(&adapter->running_cap_crqs);
1596 ibmvnic_send_crq(adapter, &crq);
1597
1598 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1599 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1600 atomic_inc(&adapter->running_cap_crqs);
1601 ibmvnic_send_crq(adapter, &crq);
1602
1603 if (adapter->netdev->flags & IFF_PROMISC) {
1604 if (adapter->promisc_supported) {
1605 crq.request_capability.capability =
1606 cpu_to_be16(PROMISC_REQUESTED);
1607 crq.request_capability.number = cpu_to_be64(1);
1608 atomic_inc(&adapter->running_cap_crqs);
1609 ibmvnic_send_crq(adapter, &crq);
1610 }
1611 } else {
1612 crq.request_capability.capability =
1613 cpu_to_be16(PROMISC_REQUESTED);
1614 crq.request_capability.number = cpu_to_be64(0);
1615 atomic_inc(&adapter->running_cap_crqs);
1616 ibmvnic_send_crq(adapter, &crq);
1617 }
1618
1619 kfree(allqueues);
1620
1621 return;
1622
1623 rx_failed:
1624 kfree(adapter->tx_scrq);
1625 adapter->tx_scrq = NULL;
1626 tx_failed:
1627 for (i = 0; i < registered_queues; i++)
1628 release_sub_crq_queue(adapter, allqueues[i]);
1629 kfree(allqueues);
1630 allqueues_failed:
1631 ibmvnic_remove(adapter->vdev);
1632 }
1633
1634 static int pending_scrq(struct ibmvnic_adapter *adapter,
1635 struct ibmvnic_sub_crq_queue *scrq)
1636 {
1637 union sub_crq *entry = &scrq->msgs[scrq->cur];
1638
1639 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1640 return 1;
1641 else
1642 return 0;
1643 }
1644
1645 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1646 struct ibmvnic_sub_crq_queue *scrq)
1647 {
1648 union sub_crq *entry;
1649 unsigned long flags;
1650
1651 spin_lock_irqsave(&scrq->lock, flags);
1652 entry = &scrq->msgs[scrq->cur];
1653 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1654 if (++scrq->cur == scrq->size)
1655 scrq->cur = 0;
1656 } else {
1657 entry = NULL;
1658 }
1659 spin_unlock_irqrestore(&scrq->lock, flags);
1660
1661 return entry;
1662 }
1663
1664 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1665 {
1666 struct ibmvnic_crq_queue *queue = &adapter->crq;
1667 union ibmvnic_crq *crq;
1668
1669 crq = &queue->msgs[queue->cur];
1670 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1671 if (++queue->cur == queue->size)
1672 queue->cur = 0;
1673 } else {
1674 crq = NULL;
1675 }
1676
1677 return crq;
1678 }
1679
1680 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1681 union sub_crq *sub_crq)
1682 {
1683 unsigned int ua = adapter->vdev->unit_address;
1684 struct device *dev = &adapter->vdev->dev;
1685 u64 *u64_crq = (u64 *)sub_crq;
1686 int rc;
1687
1688 netdev_dbg(adapter->netdev,
1689 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1690 (unsigned long int)cpu_to_be64(remote_handle),
1691 (unsigned long int)cpu_to_be64(u64_crq[0]),
1692 (unsigned long int)cpu_to_be64(u64_crq[1]),
1693 (unsigned long int)cpu_to_be64(u64_crq[2]),
1694 (unsigned long int)cpu_to_be64(u64_crq[3]));
1695
1696 /* Make sure the hypervisor sees the complete request */
1697 mb();
1698
1699 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1700 cpu_to_be64(remote_handle),
1701 cpu_to_be64(u64_crq[0]),
1702 cpu_to_be64(u64_crq[1]),
1703 cpu_to_be64(u64_crq[2]),
1704 cpu_to_be64(u64_crq[3]));
1705
1706 if (rc) {
1707 if (rc == H_CLOSED)
1708 dev_warn(dev, "CRQ Queue closed\n");
1709 dev_err(dev, "Send error (rc=%d)\n", rc);
1710 }
1711
1712 return rc;
1713 }
1714
1715 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1716 u64 remote_handle, u64 ioba, u64 num_entries)
1717 {
1718 unsigned int ua = adapter->vdev->unit_address;
1719 struct device *dev = &adapter->vdev->dev;
1720 int rc;
1721
1722 /* Make sure the hypervisor sees the complete request */
1723 mb();
1724 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1725 cpu_to_be64(remote_handle),
1726 ioba, num_entries);
1727
1728 if (rc) {
1729 if (rc == H_CLOSED)
1730 dev_warn(dev, "CRQ Queue closed\n");
1731 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1732 }
1733
1734 return rc;
1735 }
1736
1737 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1738 union ibmvnic_crq *crq)
1739 {
1740 unsigned int ua = adapter->vdev->unit_address;
1741 struct device *dev = &adapter->vdev->dev;
1742 u64 *u64_crq = (u64 *)crq;
1743 int rc;
1744
1745 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1746 (unsigned long int)cpu_to_be64(u64_crq[0]),
1747 (unsigned long int)cpu_to_be64(u64_crq[1]));
1748
1749 /* Make sure the hypervisor sees the complete request */
1750 mb();
1751
1752 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1753 cpu_to_be64(u64_crq[0]),
1754 cpu_to_be64(u64_crq[1]));
1755
1756 if (rc) {
1757 if (rc == H_CLOSED)
1758 dev_warn(dev, "CRQ Queue closed\n");
1759 dev_warn(dev, "Send error (rc=%d)\n", rc);
1760 }
1761
1762 return rc;
1763 }
1764
1765 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1766 {
1767 union ibmvnic_crq crq;
1768
1769 memset(&crq, 0, sizeof(crq));
1770 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1771 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1772 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1773
1774 return ibmvnic_send_crq(adapter, &crq);
1775 }
1776
1777 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1778 {
1779 union ibmvnic_crq crq;
1780
1781 memset(&crq, 0, sizeof(crq));
1782 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1783 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1784 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1785
1786 return ibmvnic_send_crq(adapter, &crq);
1787 }
1788
1789 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1790 {
1791 union ibmvnic_crq crq;
1792
1793 memset(&crq, 0, sizeof(crq));
1794 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1795 crq.version_exchange.cmd = VERSION_EXCHANGE;
1796 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1797
1798 return ibmvnic_send_crq(adapter, &crq);
1799 }
1800
1801 static void send_login(struct ibmvnic_adapter *adapter)
1802 {
1803 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1804 struct ibmvnic_login_buffer *login_buffer;
1805 struct ibmvnic_inflight_cmd *inflight_cmd;
1806 struct device *dev = &adapter->vdev->dev;
1807 dma_addr_t rsp_buffer_token;
1808 dma_addr_t buffer_token;
1809 size_t rsp_buffer_size;
1810 union ibmvnic_crq crq;
1811 unsigned long flags;
1812 size_t buffer_size;
1813 __be64 *tx_list_p;
1814 __be64 *rx_list_p;
1815 int i;
1816
1817 buffer_size =
1818 sizeof(struct ibmvnic_login_buffer) +
1819 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1820
1821 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1822 if (!login_buffer)
1823 goto buf_alloc_failed;
1824
1825 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1826 DMA_TO_DEVICE);
1827 if (dma_mapping_error(dev, buffer_token)) {
1828 dev_err(dev, "Couldn't map login buffer\n");
1829 goto buf_map_failed;
1830 }
1831
1832 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1833 sizeof(u64) * adapter->req_tx_queues +
1834 sizeof(u64) * adapter->req_rx_queues +
1835 sizeof(u64) * adapter->req_rx_queues +
1836 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1837
1838 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1839 if (!login_rsp_buffer)
1840 goto buf_rsp_alloc_failed;
1841
1842 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1843 rsp_buffer_size, DMA_FROM_DEVICE);
1844 if (dma_mapping_error(dev, rsp_buffer_token)) {
1845 dev_err(dev, "Couldn't map login rsp buffer\n");
1846 goto buf_rsp_map_failed;
1847 }
1848 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1849 if (!inflight_cmd) {
1850 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1851 goto inflight_alloc_failed;
1852 }
1853 adapter->login_buf = login_buffer;
1854 adapter->login_buf_token = buffer_token;
1855 adapter->login_buf_sz = buffer_size;
1856 adapter->login_rsp_buf = login_rsp_buffer;
1857 adapter->login_rsp_buf_token = rsp_buffer_token;
1858 adapter->login_rsp_buf_sz = rsp_buffer_size;
1859
1860 login_buffer->len = cpu_to_be32(buffer_size);
1861 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1862 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1863 login_buffer->off_txcomp_subcrqs =
1864 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1865 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1866 login_buffer->off_rxcomp_subcrqs =
1867 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1868 sizeof(u64) * adapter->req_tx_queues);
1869 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1870 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1871
1872 tx_list_p = (__be64 *)((char *)login_buffer +
1873 sizeof(struct ibmvnic_login_buffer));
1874 rx_list_p = (__be64 *)((char *)login_buffer +
1875 sizeof(struct ibmvnic_login_buffer) +
1876 sizeof(u64) * adapter->req_tx_queues);
1877
1878 for (i = 0; i < adapter->req_tx_queues; i++) {
1879 if (adapter->tx_scrq[i]) {
1880 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1881 crq_num);
1882 }
1883 }
1884
1885 for (i = 0; i < adapter->req_rx_queues; i++) {
1886 if (adapter->rx_scrq[i]) {
1887 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1888 crq_num);
1889 }
1890 }
1891
1892 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1893 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1894 netdev_dbg(adapter->netdev, "%016lx\n",
1895 ((unsigned long int *)(adapter->login_buf))[i]);
1896 }
1897
1898 memset(&crq, 0, sizeof(crq));
1899 crq.login.first = IBMVNIC_CRQ_CMD;
1900 crq.login.cmd = LOGIN;
1901 crq.login.ioba = cpu_to_be32(buffer_token);
1902 crq.login.len = cpu_to_be32(buffer_size);
1903
1904 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1905
1906 spin_lock_irqsave(&adapter->inflight_lock, flags);
1907 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1908 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1909
1910 ibmvnic_send_crq(adapter, &crq);
1911
1912 return;
1913
1914 inflight_alloc_failed:
1915 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1916 DMA_FROM_DEVICE);
1917 buf_rsp_map_failed:
1918 kfree(login_rsp_buffer);
1919 buf_rsp_alloc_failed:
1920 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1921 buf_map_failed:
1922 kfree(login_buffer);
1923 buf_alloc_failed:
1924 return;
1925 }
1926
1927 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1928 u32 len, u8 map_id)
1929 {
1930 union ibmvnic_crq crq;
1931
1932 memset(&crq, 0, sizeof(crq));
1933 crq.request_map.first = IBMVNIC_CRQ_CMD;
1934 crq.request_map.cmd = REQUEST_MAP;
1935 crq.request_map.map_id = map_id;
1936 crq.request_map.ioba = cpu_to_be32(addr);
1937 crq.request_map.len = cpu_to_be32(len);
1938 ibmvnic_send_crq(adapter, &crq);
1939 }
1940
1941 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1942 {
1943 union ibmvnic_crq crq;
1944
1945 memset(&crq, 0, sizeof(crq));
1946 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1947 crq.request_unmap.cmd = REQUEST_UNMAP;
1948 crq.request_unmap.map_id = map_id;
1949 ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 static void send_map_query(struct ibmvnic_adapter *adapter)
1953 {
1954 union ibmvnic_crq crq;
1955
1956 memset(&crq, 0, sizeof(crq));
1957 crq.query_map.first = IBMVNIC_CRQ_CMD;
1958 crq.query_map.cmd = QUERY_MAP;
1959 ibmvnic_send_crq(adapter, &crq);
1960 }
1961
1962 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1963 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1964 {
1965 union ibmvnic_crq crq;
1966
1967 atomic_set(&adapter->running_cap_crqs, 0);
1968 memset(&crq, 0, sizeof(crq));
1969 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1970 crq.query_capability.cmd = QUERY_CAPABILITY;
1971
1972 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1973 atomic_inc(&adapter->running_cap_crqs);
1974 ibmvnic_send_crq(adapter, &crq);
1975
1976 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1977 atomic_inc(&adapter->running_cap_crqs);
1978 ibmvnic_send_crq(adapter, &crq);
1979
1980 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1981 atomic_inc(&adapter->running_cap_crqs);
1982 ibmvnic_send_crq(adapter, &crq);
1983
1984 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1985 atomic_inc(&adapter->running_cap_crqs);
1986 ibmvnic_send_crq(adapter, &crq);
1987
1988 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1989 atomic_inc(&adapter->running_cap_crqs);
1990 ibmvnic_send_crq(adapter, &crq);
1991
1992 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1993 atomic_inc(&adapter->running_cap_crqs);
1994 ibmvnic_send_crq(adapter, &crq);
1995
1996 crq.query_capability.capability =
1997 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1998 atomic_inc(&adapter->running_cap_crqs);
1999 ibmvnic_send_crq(adapter, &crq);
2000
2001 crq.query_capability.capability =
2002 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2003 atomic_inc(&adapter->running_cap_crqs);
2004 ibmvnic_send_crq(adapter, &crq);
2005
2006 crq.query_capability.capability =
2007 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2008 atomic_inc(&adapter->running_cap_crqs);
2009 ibmvnic_send_crq(adapter, &crq);
2010
2011 crq.query_capability.capability =
2012 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2013 atomic_inc(&adapter->running_cap_crqs);
2014 ibmvnic_send_crq(adapter, &crq);
2015
2016 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2017 atomic_inc(&adapter->running_cap_crqs);
2018 ibmvnic_send_crq(adapter, &crq);
2019
2020 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2021 atomic_inc(&adapter->running_cap_crqs);
2022 ibmvnic_send_crq(adapter, &crq);
2023
2024 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2025 atomic_inc(&adapter->running_cap_crqs);
2026 ibmvnic_send_crq(adapter, &crq);
2027
2028 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2029 atomic_inc(&adapter->running_cap_crqs);
2030 ibmvnic_send_crq(adapter, &crq);
2031
2032 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2033 atomic_inc(&adapter->running_cap_crqs);
2034 ibmvnic_send_crq(adapter, &crq);
2035
2036 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2037 atomic_inc(&adapter->running_cap_crqs);
2038 ibmvnic_send_crq(adapter, &crq);
2039
2040 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2041 atomic_inc(&adapter->running_cap_crqs);
2042 ibmvnic_send_crq(adapter, &crq);
2043
2044 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2045 atomic_inc(&adapter->running_cap_crqs);
2046 ibmvnic_send_crq(adapter, &crq);
2047
2048 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2049 atomic_inc(&adapter->running_cap_crqs);
2050 ibmvnic_send_crq(adapter, &crq);
2051
2052 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2053 atomic_inc(&adapter->running_cap_crqs);
2054 ibmvnic_send_crq(adapter, &crq);
2055
2056 crq.query_capability.capability =
2057 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2058 atomic_inc(&adapter->running_cap_crqs);
2059 ibmvnic_send_crq(adapter, &crq);
2060
2061 crq.query_capability.capability =
2062 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2063 atomic_inc(&adapter->running_cap_crqs);
2064 ibmvnic_send_crq(adapter, &crq);
2065
2066 crq.query_capability.capability =
2067 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2068 atomic_inc(&adapter->running_cap_crqs);
2069 ibmvnic_send_crq(adapter, &crq);
2070
2071 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2072 atomic_inc(&adapter->running_cap_crqs);
2073 ibmvnic_send_crq(adapter, &crq);
2074 }
2075
2076 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2077 {
2078 struct device *dev = &adapter->vdev->dev;
2079 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2080 union ibmvnic_crq crq;
2081 int i;
2082
2083 dma_unmap_single(dev, adapter->ip_offload_tok,
2084 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2085
2086 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2087 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2088 netdev_dbg(adapter->netdev, "%016lx\n",
2089 ((unsigned long int *)(buf))[i]);
2090
2091 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2092 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2093 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2094 buf->tcp_ipv4_chksum);
2095 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2096 buf->tcp_ipv6_chksum);
2097 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2098 buf->udp_ipv4_chksum);
2099 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2100 buf->udp_ipv6_chksum);
2101 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2102 buf->large_tx_ipv4);
2103 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2104 buf->large_tx_ipv6);
2105 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2106 buf->large_rx_ipv4);
2107 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2108 buf->large_rx_ipv6);
2109 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2110 buf->max_ipv4_header_size);
2111 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2112 buf->max_ipv6_header_size);
2113 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2114 buf->max_tcp_header_size);
2115 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2116 buf->max_udp_header_size);
2117 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2118 buf->max_large_tx_size);
2119 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2120 buf->max_large_rx_size);
2121 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2122 buf->ipv6_extension_header);
2123 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2124 buf->tcp_pseudosum_req);
2125 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2126 buf->num_ipv6_ext_headers);
2127 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2128 buf->off_ipv6_ext_headers);
2129
2130 adapter->ip_offload_ctrl_tok =
2131 dma_map_single(dev, &adapter->ip_offload_ctrl,
2132 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2133
2134 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2135 dev_err(dev, "Couldn't map ip offload control buffer\n");
2136 return;
2137 }
2138
2139 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2140 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2141 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2142 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2143 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2144
2145 /* large_tx/rx disabled for now, additional features needed */
2146 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2147 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2148 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2149 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2150
2151 adapter->netdev->features = NETIF_F_GSO;
2152
2153 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2154 adapter->netdev->features |= NETIF_F_IP_CSUM;
2155
2156 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2157 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2158
2159 if ((adapter->netdev->features &
2160 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2161 adapter->netdev->features |= NETIF_F_RXCSUM;
2162
2163 memset(&crq, 0, sizeof(crq));
2164 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2165 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2166 crq.control_ip_offload.len =
2167 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2168 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2169 ibmvnic_send_crq(adapter, &crq);
2170 }
2171
2172 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2173 struct ibmvnic_adapter *adapter)
2174 {
2175 struct device *dev = &adapter->vdev->dev;
2176 struct ibmvnic_error_buff *error_buff, *tmp;
2177 unsigned long flags;
2178 bool found = false;
2179 int i;
2180
2181 if (!crq->request_error_rsp.rc.code) {
2182 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2183 crq->request_error_rsp.rc.code);
2184 return;
2185 }
2186
2187 spin_lock_irqsave(&adapter->error_list_lock, flags);
2188 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2189 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2190 found = true;
2191 list_del(&error_buff->list);
2192 break;
2193 }
2194 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2195
2196 if (!found) {
2197 dev_err(dev, "Couldn't find error id %x\n",
2198 be32_to_cpu(crq->request_error_rsp.error_id));
2199 return;
2200 }
2201
2202 dev_err(dev, "Detailed info for error id %x:",
2203 be32_to_cpu(crq->request_error_rsp.error_id));
2204
2205 for (i = 0; i < error_buff->len; i++) {
2206 pr_cont("%02x", (int)error_buff->buff[i]);
2207 if (i % 8 == 7)
2208 pr_cont(" ");
2209 }
2210 pr_cont("\n");
2211
2212 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2213 DMA_FROM_DEVICE);
2214 kfree(error_buff->buff);
2215 kfree(error_buff);
2216 }
2217
2218 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2219 struct ibmvnic_adapter *adapter)
2220 {
2221 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2222 struct ibmvnic_inflight_cmd *inflight_cmd;
2223 struct device *dev = &adapter->vdev->dev;
2224 union ibmvnic_crq newcrq;
2225 unsigned long flags;
2226
2227 /* allocate and map buffer */
2228 adapter->dump_data = kmalloc(len, GFP_KERNEL);
2229 if (!adapter->dump_data) {
2230 complete(&adapter->fw_done);
2231 return;
2232 }
2233
2234 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2235 DMA_FROM_DEVICE);
2236
2237 if (dma_mapping_error(dev, adapter->dump_data_token)) {
2238 if (!firmware_has_feature(FW_FEATURE_CMO))
2239 dev_err(dev, "Couldn't map dump data\n");
2240 kfree(adapter->dump_data);
2241 complete(&adapter->fw_done);
2242 return;
2243 }
2244
2245 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2246 if (!inflight_cmd) {
2247 dma_unmap_single(dev, adapter->dump_data_token, len,
2248 DMA_FROM_DEVICE);
2249 kfree(adapter->dump_data);
2250 complete(&adapter->fw_done);
2251 return;
2252 }
2253
2254 memset(&newcrq, 0, sizeof(newcrq));
2255 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2256 newcrq.request_dump.cmd = REQUEST_DUMP;
2257 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2258 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2259
2260 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2261
2262 spin_lock_irqsave(&adapter->inflight_lock, flags);
2263 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2264 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2265
2266 ibmvnic_send_crq(adapter, &newcrq);
2267 }
2268
2269 static void handle_error_indication(union ibmvnic_crq *crq,
2270 struct ibmvnic_adapter *adapter)
2271 {
2272 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2273 struct ibmvnic_inflight_cmd *inflight_cmd;
2274 struct device *dev = &adapter->vdev->dev;
2275 struct ibmvnic_error_buff *error_buff;
2276 union ibmvnic_crq new_crq;
2277 unsigned long flags;
2278
2279 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2280 crq->error_indication.
2281 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2282 be32_to_cpu(crq->error_indication.error_id),
2283 be16_to_cpu(crq->error_indication.error_cause));
2284
2285 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2286 if (!error_buff)
2287 return;
2288
2289 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2290 if (!error_buff->buff) {
2291 kfree(error_buff);
2292 return;
2293 }
2294
2295 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2296 DMA_FROM_DEVICE);
2297 if (dma_mapping_error(dev, error_buff->dma)) {
2298 if (!firmware_has_feature(FW_FEATURE_CMO))
2299 dev_err(dev, "Couldn't map error buffer\n");
2300 kfree(error_buff->buff);
2301 kfree(error_buff);
2302 return;
2303 }
2304
2305 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2306 if (!inflight_cmd) {
2307 dma_unmap_single(dev, error_buff->dma, detail_len,
2308 DMA_FROM_DEVICE);
2309 kfree(error_buff->buff);
2310 kfree(error_buff);
2311 return;
2312 }
2313
2314 error_buff->len = detail_len;
2315 error_buff->error_id = crq->error_indication.error_id;
2316
2317 spin_lock_irqsave(&adapter->error_list_lock, flags);
2318 list_add_tail(&error_buff->list, &adapter->errors);
2319 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2320
2321 memset(&new_crq, 0, sizeof(new_crq));
2322 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2323 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2324 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2325 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2326 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2327
2328 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2329
2330 spin_lock_irqsave(&adapter->inflight_lock, flags);
2331 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2332 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2333
2334 ibmvnic_send_crq(adapter, &new_crq);
2335 }
2336
2337 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2338 struct ibmvnic_adapter *adapter)
2339 {
2340 struct net_device *netdev = adapter->netdev;
2341 struct device *dev = &adapter->vdev->dev;
2342 long rc;
2343
2344 rc = crq->change_mac_addr_rsp.rc.code;
2345 if (rc) {
2346 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2347 return;
2348 }
2349 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2350 ETH_ALEN);
2351 }
2352
2353 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2354 struct ibmvnic_adapter *adapter)
2355 {
2356 struct device *dev = &adapter->vdev->dev;
2357 u64 *req_value;
2358 char *name;
2359
2360 atomic_dec(&adapter->running_cap_crqs);
2361 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2362 case REQ_TX_QUEUES:
2363 req_value = &adapter->req_tx_queues;
2364 name = "tx";
2365 break;
2366 case REQ_RX_QUEUES:
2367 req_value = &adapter->req_rx_queues;
2368 name = "rx";
2369 break;
2370 case REQ_RX_ADD_QUEUES:
2371 req_value = &adapter->req_rx_add_queues;
2372 name = "rx_add";
2373 break;
2374 case REQ_TX_ENTRIES_PER_SUBCRQ:
2375 req_value = &adapter->req_tx_entries_per_subcrq;
2376 name = "tx_entries_per_subcrq";
2377 break;
2378 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2379 req_value = &adapter->req_rx_add_entries_per_subcrq;
2380 name = "rx_add_entries_per_subcrq";
2381 break;
2382 case REQ_MTU:
2383 req_value = &adapter->req_mtu;
2384 name = "mtu";
2385 break;
2386 case PROMISC_REQUESTED:
2387 req_value = &adapter->promisc;
2388 name = "promisc";
2389 break;
2390 default:
2391 dev_err(dev, "Got invalid cap request rsp %d\n",
2392 crq->request_capability.capability);
2393 return;
2394 }
2395
2396 switch (crq->request_capability_rsp.rc.code) {
2397 case SUCCESS:
2398 break;
2399 case PARTIALSUCCESS:
2400 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2401 *req_value,
2402 (long int)be64_to_cpu(crq->request_capability_rsp.
2403 number), name);
2404 release_sub_crqs_no_irqs(adapter);
2405 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2406 init_sub_crqs(adapter, 1);
2407 return;
2408 default:
2409 dev_err(dev, "Error %d in request cap rsp\n",
2410 crq->request_capability_rsp.rc.code);
2411 return;
2412 }
2413
2414 /* Done receiving requested capabilities, query IP offload support */
2415 if (atomic_read(&adapter->running_cap_crqs) == 0) {
2416 union ibmvnic_crq newcrq;
2417 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2418 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2419 &adapter->ip_offload_buf;
2420
2421 adapter->wait_capability = false;
2422 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2423 buf_sz,
2424 DMA_FROM_DEVICE);
2425
2426 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2427 if (!firmware_has_feature(FW_FEATURE_CMO))
2428 dev_err(dev, "Couldn't map offload buffer\n");
2429 return;
2430 }
2431
2432 memset(&newcrq, 0, sizeof(newcrq));
2433 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2434 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2435 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2436 newcrq.query_ip_offload.ioba =
2437 cpu_to_be32(adapter->ip_offload_tok);
2438
2439 ibmvnic_send_crq(adapter, &newcrq);
2440 }
2441 }
2442
2443 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2444 struct ibmvnic_adapter *adapter)
2445 {
2446 struct device *dev = &adapter->vdev->dev;
2447 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2448 struct ibmvnic_login_buffer *login = adapter->login_buf;
2449 union ibmvnic_crq crq;
2450 int i;
2451
2452 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2453 DMA_BIDIRECTIONAL);
2454 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2455 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2456
2457 /* If the number of queues requested can't be allocated by the
2458 * server, the login response will return with code 1. We will need
2459 * to resend the login buffer with fewer queues requested.
2460 */
2461 if (login_rsp_crq->generic.rc.code) {
2462 adapter->renegotiate = true;
2463 complete(&adapter->init_done);
2464 return 0;
2465 }
2466
2467 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2468 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2469 netdev_dbg(adapter->netdev, "%016lx\n",
2470 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2471 }
2472
2473 /* Sanity checks */
2474 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2475 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2476 adapter->req_rx_add_queues !=
2477 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2478 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2479 ibmvnic_remove(adapter->vdev);
2480 return -EIO;
2481 }
2482 complete(&adapter->init_done);
2483
2484 memset(&crq, 0, sizeof(crq));
2485 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2486 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2487 ibmvnic_send_crq(adapter, &crq);
2488
2489 return 0;
2490 }
2491
2492 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2493 struct ibmvnic_adapter *adapter)
2494 {
2495 struct device *dev = &adapter->vdev->dev;
2496 u8 map_id = crq->request_map_rsp.map_id;
2497 int tx_subcrqs;
2498 int rx_subcrqs;
2499 long rc;
2500 int i;
2501
2502 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2503 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2504
2505 rc = crq->request_map_rsp.rc.code;
2506 if (rc) {
2507 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2508 adapter->map_id--;
2509 /* need to find and zero tx/rx_pool map_id */
2510 for (i = 0; i < tx_subcrqs; i++) {
2511 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2512 adapter->tx_pool[i].long_term_buff.map_id = 0;
2513 }
2514 for (i = 0; i < rx_subcrqs; i++) {
2515 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2516 adapter->rx_pool[i].long_term_buff.map_id = 0;
2517 }
2518 }
2519 complete(&adapter->fw_done);
2520 }
2521
2522 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2523 struct ibmvnic_adapter *adapter)
2524 {
2525 struct device *dev = &adapter->vdev->dev;
2526 long rc;
2527
2528 rc = crq->request_unmap_rsp.rc.code;
2529 if (rc)
2530 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2531 }
2532
2533 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2534 struct ibmvnic_adapter *adapter)
2535 {
2536 struct net_device *netdev = adapter->netdev;
2537 struct device *dev = &adapter->vdev->dev;
2538 long rc;
2539
2540 rc = crq->query_map_rsp.rc.code;
2541 if (rc) {
2542 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2543 return;
2544 }
2545 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2546 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2547 crq->query_map_rsp.free_pages);
2548 }
2549
2550 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2551 struct ibmvnic_adapter *adapter)
2552 {
2553 struct net_device *netdev = adapter->netdev;
2554 struct device *dev = &adapter->vdev->dev;
2555 long rc;
2556
2557 atomic_dec(&adapter->running_cap_crqs);
2558 netdev_dbg(netdev, "Outstanding queries: %d\n",
2559 atomic_read(&adapter->running_cap_crqs));
2560 rc = crq->query_capability.rc.code;
2561 if (rc) {
2562 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2563 goto out;
2564 }
2565
2566 switch (be16_to_cpu(crq->query_capability.capability)) {
2567 case MIN_TX_QUEUES:
2568 adapter->min_tx_queues =
2569 be64_to_cpu(crq->query_capability.number);
2570 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2571 adapter->min_tx_queues);
2572 break;
2573 case MIN_RX_QUEUES:
2574 adapter->min_rx_queues =
2575 be64_to_cpu(crq->query_capability.number);
2576 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2577 adapter->min_rx_queues);
2578 break;
2579 case MIN_RX_ADD_QUEUES:
2580 adapter->min_rx_add_queues =
2581 be64_to_cpu(crq->query_capability.number);
2582 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2583 adapter->min_rx_add_queues);
2584 break;
2585 case MAX_TX_QUEUES:
2586 adapter->max_tx_queues =
2587 be64_to_cpu(crq->query_capability.number);
2588 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2589 adapter->max_tx_queues);
2590 break;
2591 case MAX_RX_QUEUES:
2592 adapter->max_rx_queues =
2593 be64_to_cpu(crq->query_capability.number);
2594 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2595 adapter->max_rx_queues);
2596 break;
2597 case MAX_RX_ADD_QUEUES:
2598 adapter->max_rx_add_queues =
2599 be64_to_cpu(crq->query_capability.number);
2600 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2601 adapter->max_rx_add_queues);
2602 break;
2603 case MIN_TX_ENTRIES_PER_SUBCRQ:
2604 adapter->min_tx_entries_per_subcrq =
2605 be64_to_cpu(crq->query_capability.number);
2606 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2607 adapter->min_tx_entries_per_subcrq);
2608 break;
2609 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2610 adapter->min_rx_add_entries_per_subcrq =
2611 be64_to_cpu(crq->query_capability.number);
2612 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2613 adapter->min_rx_add_entries_per_subcrq);
2614 break;
2615 case MAX_TX_ENTRIES_PER_SUBCRQ:
2616 adapter->max_tx_entries_per_subcrq =
2617 be64_to_cpu(crq->query_capability.number);
2618 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2619 adapter->max_tx_entries_per_subcrq);
2620 break;
2621 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2622 adapter->max_rx_add_entries_per_subcrq =
2623 be64_to_cpu(crq->query_capability.number);
2624 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2625 adapter->max_rx_add_entries_per_subcrq);
2626 break;
2627 case TCP_IP_OFFLOAD:
2628 adapter->tcp_ip_offload =
2629 be64_to_cpu(crq->query_capability.number);
2630 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2631 adapter->tcp_ip_offload);
2632 break;
2633 case PROMISC_SUPPORTED:
2634 adapter->promisc_supported =
2635 be64_to_cpu(crq->query_capability.number);
2636 netdev_dbg(netdev, "promisc_supported = %lld\n",
2637 adapter->promisc_supported);
2638 break;
2639 case MIN_MTU:
2640 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2641 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2642 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2643 break;
2644 case MAX_MTU:
2645 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2646 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2647 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2648 break;
2649 case MAX_MULTICAST_FILTERS:
2650 adapter->max_multicast_filters =
2651 be64_to_cpu(crq->query_capability.number);
2652 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2653 adapter->max_multicast_filters);
2654 break;
2655 case VLAN_HEADER_INSERTION:
2656 adapter->vlan_header_insertion =
2657 be64_to_cpu(crq->query_capability.number);
2658 if (adapter->vlan_header_insertion)
2659 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2660 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2661 adapter->vlan_header_insertion);
2662 break;
2663 case MAX_TX_SG_ENTRIES:
2664 adapter->max_tx_sg_entries =
2665 be64_to_cpu(crq->query_capability.number);
2666 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2667 adapter->max_tx_sg_entries);
2668 break;
2669 case RX_SG_SUPPORTED:
2670 adapter->rx_sg_supported =
2671 be64_to_cpu(crq->query_capability.number);
2672 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2673 adapter->rx_sg_supported);
2674 break;
2675 case OPT_TX_COMP_SUB_QUEUES:
2676 adapter->opt_tx_comp_sub_queues =
2677 be64_to_cpu(crq->query_capability.number);
2678 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2679 adapter->opt_tx_comp_sub_queues);
2680 break;
2681 case OPT_RX_COMP_QUEUES:
2682 adapter->opt_rx_comp_queues =
2683 be64_to_cpu(crq->query_capability.number);
2684 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2685 adapter->opt_rx_comp_queues);
2686 break;
2687 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2688 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2689 be64_to_cpu(crq->query_capability.number);
2690 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2691 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2692 break;
2693 case OPT_TX_ENTRIES_PER_SUBCRQ:
2694 adapter->opt_tx_entries_per_subcrq =
2695 be64_to_cpu(crq->query_capability.number);
2696 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2697 adapter->opt_tx_entries_per_subcrq);
2698 break;
2699 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2700 adapter->opt_rxba_entries_per_subcrq =
2701 be64_to_cpu(crq->query_capability.number);
2702 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2703 adapter->opt_rxba_entries_per_subcrq);
2704 break;
2705 case TX_RX_DESC_REQ:
2706 adapter->tx_rx_desc_req = crq->query_capability.number;
2707 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2708 adapter->tx_rx_desc_req);
2709 break;
2710
2711 default:
2712 netdev_err(netdev, "Got invalid cap rsp %d\n",
2713 crq->query_capability.capability);
2714 }
2715
2716 out:
2717 if (atomic_read(&adapter->running_cap_crqs) == 0) {
2718 adapter->wait_capability = false;
2719 init_sub_crqs(adapter, 0);
2720 /* We're done querying the capabilities, initialize sub-crqs */
2721 }
2722 }
2723
2724 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2725 struct ibmvnic_adapter *adapter)
2726 {
2727 u8 correlator = crq->control_ras_rsp.correlator;
2728 struct device *dev = &adapter->vdev->dev;
2729 bool found = false;
2730 int i;
2731
2732 if (crq->control_ras_rsp.rc.code) {
2733 dev_warn(dev, "Control ras failed rc=%d\n",
2734 crq->control_ras_rsp.rc.code);
2735 return;
2736 }
2737
2738 for (i = 0; i < adapter->ras_comp_num; i++) {
2739 if (adapter->ras_comps[i].correlator == correlator) {
2740 found = true;
2741 break;
2742 }
2743 }
2744
2745 if (!found) {
2746 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2747 return;
2748 }
2749
2750 switch (crq->control_ras_rsp.op) {
2751 case IBMVNIC_TRACE_LEVEL:
2752 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2753 break;
2754 case IBMVNIC_ERROR_LEVEL:
2755 adapter->ras_comps[i].error_check_level =
2756 crq->control_ras.level;
2757 break;
2758 case IBMVNIC_TRACE_PAUSE:
2759 adapter->ras_comp_int[i].paused = 1;
2760 break;
2761 case IBMVNIC_TRACE_RESUME:
2762 adapter->ras_comp_int[i].paused = 0;
2763 break;
2764 case IBMVNIC_TRACE_ON:
2765 adapter->ras_comps[i].trace_on = 1;
2766 break;
2767 case IBMVNIC_TRACE_OFF:
2768 adapter->ras_comps[i].trace_on = 0;
2769 break;
2770 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2771 /* trace_buff_sz is 3 bytes, stuff it into an int */
2772 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2773 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2774 crq->control_ras_rsp.trace_buff_sz[0];
2775 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2776 crq->control_ras_rsp.trace_buff_sz[1];
2777 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2778 crq->control_ras_rsp.trace_buff_sz[2];
2779 break;
2780 default:
2781 dev_err(dev, "invalid op %d on control_ras_rsp",
2782 crq->control_ras_rsp.op);
2783 }
2784 }
2785
2786 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2787 loff_t *ppos)
2788 {
2789 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2790 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2791 struct device *dev = &adapter->vdev->dev;
2792 struct ibmvnic_fw_trace_entry *trace;
2793 int num = ras_comp_int->num;
2794 union ibmvnic_crq crq;
2795 dma_addr_t trace_tok;
2796
2797 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2798 return 0;
2799
2800 trace =
2801 dma_alloc_coherent(dev,
2802 be32_to_cpu(adapter->ras_comps[num].
2803 trace_buff_size), &trace_tok,
2804 GFP_KERNEL);
2805 if (!trace) {
2806 dev_err(dev, "Couldn't alloc trace buffer\n");
2807 return 0;
2808 }
2809
2810 memset(&crq, 0, sizeof(crq));
2811 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2812 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2813 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2814 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2815 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2816
2817 init_completion(&adapter->fw_done);
2818 ibmvnic_send_crq(adapter, &crq);
2819 wait_for_completion(&adapter->fw_done);
2820
2821 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2822 len =
2823 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2824 *ppos;
2825
2826 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2827
2828 dma_free_coherent(dev,
2829 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2830 trace, trace_tok);
2831 *ppos += len;
2832 return len;
2833 }
2834
2835 static const struct file_operations trace_ops = {
2836 .owner = THIS_MODULE,
2837 .open = simple_open,
2838 .read = trace_read,
2839 };
2840
2841 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2842 loff_t *ppos)
2843 {
2844 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2845 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2846 int num = ras_comp_int->num;
2847 char buff[5]; /* 1 or 0 plus \n and \0 */
2848 int size;
2849
2850 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2851
2852 if (*ppos >= size)
2853 return 0;
2854
2855 copy_to_user(user_buf, buff, size);
2856 *ppos += size;
2857 return size;
2858 }
2859
2860 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2861 size_t len, loff_t *ppos)
2862 {
2863 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2864 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2865 int num = ras_comp_int->num;
2866 union ibmvnic_crq crq;
2867 unsigned long val;
2868 char buff[9]; /* decimal max int plus \n and \0 */
2869
2870 copy_from_user(buff, user_buf, sizeof(buff));
2871 val = kstrtoul(buff, 10, NULL);
2872
2873 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2874
2875 memset(&crq, 0, sizeof(crq));
2876 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2877 crq.control_ras.cmd = CONTROL_RAS;
2878 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2879 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2880 ibmvnic_send_crq(adapter, &crq);
2881
2882 return len;
2883 }
2884
2885 static const struct file_operations paused_ops = {
2886 .owner = THIS_MODULE,
2887 .open = simple_open,
2888 .read = paused_read,
2889 .write = paused_write,
2890 };
2891
2892 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2893 size_t len, loff_t *ppos)
2894 {
2895 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2896 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2897 int num = ras_comp_int->num;
2898 char buff[5]; /* 1 or 0 plus \n and \0 */
2899 int size;
2900
2901 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2902
2903 if (*ppos >= size)
2904 return 0;
2905
2906 copy_to_user(user_buf, buff, size);
2907 *ppos += size;
2908 return size;
2909 }
2910
2911 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2912 size_t len, loff_t *ppos)
2913 {
2914 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2915 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2916 int num = ras_comp_int->num;
2917 union ibmvnic_crq crq;
2918 unsigned long val;
2919 char buff[9]; /* decimal max int plus \n and \0 */
2920
2921 copy_from_user(buff, user_buf, sizeof(buff));
2922 val = kstrtoul(buff, 10, NULL);
2923
2924 memset(&crq, 0, sizeof(crq));
2925 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2926 crq.control_ras.cmd = CONTROL_RAS;
2927 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2928 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2929
2930 return len;
2931 }
2932
2933 static const struct file_operations tracing_ops = {
2934 .owner = THIS_MODULE,
2935 .open = simple_open,
2936 .read = tracing_read,
2937 .write = tracing_write,
2938 };
2939
2940 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2941 size_t len, loff_t *ppos)
2942 {
2943 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2944 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2945 int num = ras_comp_int->num;
2946 char buff[5]; /* decimal max char plus \n and \0 */
2947 int size;
2948
2949 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2950
2951 if (*ppos >= size)
2952 return 0;
2953
2954 copy_to_user(user_buf, buff, size);
2955 *ppos += size;
2956 return size;
2957 }
2958
2959 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2960 size_t len, loff_t *ppos)
2961 {
2962 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2963 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2964 int num = ras_comp_int->num;
2965 union ibmvnic_crq crq;
2966 unsigned long val;
2967 char buff[9]; /* decimal max int plus \n and \0 */
2968
2969 copy_from_user(buff, user_buf, sizeof(buff));
2970 val = kstrtoul(buff, 10, NULL);
2971
2972 if (val > 9)
2973 val = 9;
2974
2975 memset(&crq, 0, sizeof(crq));
2976 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2977 crq.control_ras.cmd = CONTROL_RAS;
2978 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2979 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2980 crq.control_ras.level = val;
2981 ibmvnic_send_crq(adapter, &crq);
2982
2983 return len;
2984 }
2985
2986 static const struct file_operations error_level_ops = {
2987 .owner = THIS_MODULE,
2988 .open = simple_open,
2989 .read = error_level_read,
2990 .write = error_level_write,
2991 };
2992
2993 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2994 size_t len, loff_t *ppos)
2995 {
2996 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2997 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2998 int num = ras_comp_int->num;
2999 char buff[5]; /* decimal max char plus \n and \0 */
3000 int size;
3001
3002 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3003 if (*ppos >= size)
3004 return 0;
3005
3006 copy_to_user(user_buf, buff, size);
3007 *ppos += size;
3008 return size;
3009 }
3010
3011 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3012 size_t len, loff_t *ppos)
3013 {
3014 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3015 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3016 union ibmvnic_crq crq;
3017 unsigned long val;
3018 char buff[9]; /* decimal max int plus \n and \0 */
3019
3020 copy_from_user(buff, user_buf, sizeof(buff));
3021 val = kstrtoul(buff, 10, NULL);
3022 if (val > 9)
3023 val = 9;
3024
3025 memset(&crq, 0, sizeof(crq));
3026 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3027 crq.control_ras.cmd = CONTROL_RAS;
3028 crq.control_ras.correlator =
3029 adapter->ras_comps[ras_comp_int->num].correlator;
3030 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3031 crq.control_ras.level = val;
3032 ibmvnic_send_crq(adapter, &crq);
3033
3034 return len;
3035 }
3036
3037 static const struct file_operations trace_level_ops = {
3038 .owner = THIS_MODULE,
3039 .open = simple_open,
3040 .read = trace_level_read,
3041 .write = trace_level_write,
3042 };
3043
3044 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3045 size_t len, loff_t *ppos)
3046 {
3047 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3048 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3049 int num = ras_comp_int->num;
3050 char buff[9]; /* decimal max int plus \n and \0 */
3051 int size;
3052
3053 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3054 if (*ppos >= size)
3055 return 0;
3056
3057 copy_to_user(user_buf, buff, size);
3058 *ppos += size;
3059 return size;
3060 }
3061
3062 static ssize_t trace_buff_size_write(struct file *file,
3063 const char __user *user_buf, size_t len,
3064 loff_t *ppos)
3065 {
3066 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3067 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3068 union ibmvnic_crq crq;
3069 unsigned long val;
3070 char buff[9]; /* decimal max int plus \n and \0 */
3071
3072 copy_from_user(buff, user_buf, sizeof(buff));
3073 val = kstrtoul(buff, 10, NULL);
3074
3075 memset(&crq, 0, sizeof(crq));
3076 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3077 crq.control_ras.cmd = CONTROL_RAS;
3078 crq.control_ras.correlator =
3079 adapter->ras_comps[ras_comp_int->num].correlator;
3080 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3081 /* trace_buff_sz is 3 bytes, stuff an int into it */
3082 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3083 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3084 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3085 ibmvnic_send_crq(adapter, &crq);
3086
3087 return len;
3088 }
3089
3090 static const struct file_operations trace_size_ops = {
3091 .owner = THIS_MODULE,
3092 .open = simple_open,
3093 .read = trace_buff_size_read,
3094 .write = trace_buff_size_write,
3095 };
3096
3097 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3098 struct ibmvnic_adapter *adapter)
3099 {
3100 struct device *dev = &adapter->vdev->dev;
3101 struct dentry *dir_ent;
3102 struct dentry *ent;
3103 int i;
3104
3105 debugfs_remove_recursive(adapter->ras_comps_ent);
3106
3107 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3108 adapter->debugfs_dir);
3109 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3110 dev_info(dev, "debugfs create ras_comps dir failed\n");
3111 return;
3112 }
3113
3114 for (i = 0; i < adapter->ras_comp_num; i++) {
3115 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3116 adapter->ras_comps_ent);
3117 if (!dir_ent || IS_ERR(dir_ent)) {
3118 dev_info(dev, "debugfs create %s dir failed\n",
3119 adapter->ras_comps[i].name);
3120 continue;
3121 }
3122
3123 adapter->ras_comp_int[i].adapter = adapter;
3124 adapter->ras_comp_int[i].num = i;
3125 adapter->ras_comp_int[i].desc_blob.data =
3126 &adapter->ras_comps[i].description;
3127 adapter->ras_comp_int[i].desc_blob.size =
3128 sizeof(adapter->ras_comps[i].description);
3129
3130 /* Don't need to remember the dentry's because the debugfs dir
3131 * gets removed recursively
3132 */
3133 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3134 &adapter->ras_comp_int[i].desc_blob);
3135 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3136 dir_ent, &adapter->ras_comp_int[i],
3137 &trace_size_ops);
3138 ent = debugfs_create_file("trace_level",
3139 S_IRUGO |
3140 (adapter->ras_comps[i].trace_level !=
3141 0xFF ? S_IWUSR : 0),
3142 dir_ent, &adapter->ras_comp_int[i],
3143 &trace_level_ops);
3144 ent = debugfs_create_file("error_level",
3145 S_IRUGO |
3146 (adapter->
3147 ras_comps[i].error_check_level !=
3148 0xFF ? S_IWUSR : 0),
3149 dir_ent, &adapter->ras_comp_int[i],
3150 &trace_level_ops);
3151 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3152 dir_ent, &adapter->ras_comp_int[i],
3153 &tracing_ops);
3154 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3155 dir_ent, &adapter->ras_comp_int[i],
3156 &paused_ops);
3157 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3158 &adapter->ras_comp_int[i],
3159 &trace_ops);
3160 }
3161 }
3162
3163 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3164 struct ibmvnic_adapter *adapter)
3165 {
3166 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3167 struct device *dev = &adapter->vdev->dev;
3168 union ibmvnic_crq newcrq;
3169
3170 adapter->ras_comps = dma_alloc_coherent(dev, len,
3171 &adapter->ras_comps_tok,
3172 GFP_KERNEL);
3173 if (!adapter->ras_comps) {
3174 if (!firmware_has_feature(FW_FEATURE_CMO))
3175 dev_err(dev, "Couldn't alloc fw comps buffer\n");
3176 return;
3177 }
3178
3179 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3180 sizeof(struct ibmvnic_fw_comp_internal),
3181 GFP_KERNEL);
3182 if (!adapter->ras_comp_int)
3183 dma_free_coherent(dev, len, adapter->ras_comps,
3184 adapter->ras_comps_tok);
3185
3186 memset(&newcrq, 0, sizeof(newcrq));
3187 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3188 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3189 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3190 newcrq.request_ras_comps.len = cpu_to_be32(len);
3191 ibmvnic_send_crq(adapter, &newcrq);
3192 }
3193
3194 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3195 {
3196 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3197 struct device *dev = &adapter->vdev->dev;
3198 struct ibmvnic_error_buff *error_buff, *tmp2;
3199 unsigned long flags;
3200 unsigned long flags2;
3201
3202 spin_lock_irqsave(&adapter->inflight_lock, flags);
3203 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3204 switch (inflight_cmd->crq.generic.cmd) {
3205 case LOGIN:
3206 dma_unmap_single(dev, adapter->login_buf_token,
3207 adapter->login_buf_sz,
3208 DMA_BIDIRECTIONAL);
3209 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3210 adapter->login_rsp_buf_sz,
3211 DMA_BIDIRECTIONAL);
3212 kfree(adapter->login_rsp_buf);
3213 kfree(adapter->login_buf);
3214 break;
3215 case REQUEST_DUMP:
3216 complete(&adapter->fw_done);
3217 break;
3218 case REQUEST_ERROR_INFO:
3219 spin_lock_irqsave(&adapter->error_list_lock, flags2);
3220 list_for_each_entry_safe(error_buff, tmp2,
3221 &adapter->errors, list) {
3222 dma_unmap_single(dev, error_buff->dma,
3223 error_buff->len,
3224 DMA_FROM_DEVICE);
3225 kfree(error_buff->buff);
3226 list_del(&error_buff->list);
3227 kfree(error_buff);
3228 }
3229 spin_unlock_irqrestore(&adapter->error_list_lock,
3230 flags2);
3231 break;
3232 }
3233 list_del(&inflight_cmd->list);
3234 kfree(inflight_cmd);
3235 }
3236 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3237 }
3238
3239 static void ibmvnic_xport_event(struct work_struct *work)
3240 {
3241 struct ibmvnic_adapter *adapter = container_of(work,
3242 struct ibmvnic_adapter,
3243 ibmvnic_xport);
3244 struct device *dev = &adapter->vdev->dev;
3245 long rc;
3246
3247 ibmvnic_free_inflight(adapter);
3248 release_sub_crqs(adapter);
3249 if (adapter->migrated) {
3250 rc = ibmvnic_reenable_crq_queue(adapter);
3251 if (rc)
3252 dev_err(dev, "Error after enable rc=%ld\n", rc);
3253 adapter->migrated = false;
3254 rc = ibmvnic_send_crq_init(adapter);
3255 if (rc)
3256 dev_err(dev, "Error sending init rc=%ld\n", rc);
3257 }
3258 }
3259
3260 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3261 struct ibmvnic_adapter *adapter)
3262 {
3263 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3264 struct net_device *netdev = adapter->netdev;
3265 struct device *dev = &adapter->vdev->dev;
3266 long rc;
3267
3268 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3269 ((unsigned long int *)crq)[0],
3270 ((unsigned long int *)crq)[1]);
3271 switch (gen_crq->first) {
3272 case IBMVNIC_CRQ_INIT_RSP:
3273 switch (gen_crq->cmd) {
3274 case IBMVNIC_CRQ_INIT:
3275 dev_info(dev, "Partner initialized\n");
3276 /* Send back a response */
3277 rc = ibmvnic_send_crq_init_complete(adapter);
3278 if (!rc)
3279 schedule_work(&adapter->vnic_crq_init);
3280 else
3281 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3282 break;
3283 case IBMVNIC_CRQ_INIT_COMPLETE:
3284 dev_info(dev, "Partner initialization complete\n");
3285 send_version_xchg(adapter);
3286 break;
3287 default:
3288 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3289 }
3290 return;
3291 case IBMVNIC_CRQ_XPORT_EVENT:
3292 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3293 dev_info(dev, "Re-enabling adapter\n");
3294 adapter->migrated = true;
3295 schedule_work(&adapter->ibmvnic_xport);
3296 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3297 dev_info(dev, "Backing device failover detected\n");
3298 netif_carrier_off(netdev);
3299 adapter->failover = true;
3300 } else {
3301 /* The adapter lost the connection */
3302 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3303 gen_crq->cmd);
3304 schedule_work(&adapter->ibmvnic_xport);
3305 }
3306 return;
3307 case IBMVNIC_CRQ_CMD_RSP:
3308 break;
3309 default:
3310 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3311 gen_crq->first);
3312 return;
3313 }
3314
3315 switch (gen_crq->cmd) {
3316 case VERSION_EXCHANGE_RSP:
3317 rc = crq->version_exchange_rsp.rc.code;
3318 if (rc) {
3319 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3320 break;
3321 }
3322 dev_info(dev, "Partner protocol version is %d\n",
3323 crq->version_exchange_rsp.version);
3324 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3325 ibmvnic_version)
3326 ibmvnic_version =
3327 be16_to_cpu(crq->version_exchange_rsp.version);
3328 send_cap_queries(adapter);
3329 break;
3330 case QUERY_CAPABILITY_RSP:
3331 handle_query_cap_rsp(crq, adapter);
3332 break;
3333 case QUERY_MAP_RSP:
3334 handle_query_map_rsp(crq, adapter);
3335 break;
3336 case REQUEST_MAP_RSP:
3337 handle_request_map_rsp(crq, adapter);
3338 break;
3339 case REQUEST_UNMAP_RSP:
3340 handle_request_unmap_rsp(crq, adapter);
3341 break;
3342 case REQUEST_CAPABILITY_RSP:
3343 handle_request_cap_rsp(crq, adapter);
3344 break;
3345 case LOGIN_RSP:
3346 netdev_dbg(netdev, "Got Login Response\n");
3347 handle_login_rsp(crq, adapter);
3348 break;
3349 case LOGICAL_LINK_STATE_RSP:
3350 netdev_dbg(netdev, "Got Logical Link State Response\n");
3351 adapter->logical_link_state =
3352 crq->logical_link_state_rsp.link_state;
3353 break;
3354 case LINK_STATE_INDICATION:
3355 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3356 adapter->phys_link_state =
3357 crq->link_state_indication.phys_link_state;
3358 adapter->logical_link_state =
3359 crq->link_state_indication.logical_link_state;
3360 break;
3361 case CHANGE_MAC_ADDR_RSP:
3362 netdev_dbg(netdev, "Got MAC address change Response\n");
3363 handle_change_mac_rsp(crq, adapter);
3364 break;
3365 case ERROR_INDICATION:
3366 netdev_dbg(netdev, "Got Error Indication\n");
3367 handle_error_indication(crq, adapter);
3368 break;
3369 case REQUEST_ERROR_RSP:
3370 netdev_dbg(netdev, "Got Error Detail Response\n");
3371 handle_error_info_rsp(crq, adapter);
3372 break;
3373 case REQUEST_STATISTICS_RSP:
3374 netdev_dbg(netdev, "Got Statistics Response\n");
3375 complete(&adapter->stats_done);
3376 break;
3377 case REQUEST_DUMP_SIZE_RSP:
3378 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3379 handle_dump_size_rsp(crq, adapter);
3380 break;
3381 case REQUEST_DUMP_RSP:
3382 netdev_dbg(netdev, "Got Request Dump Response\n");
3383 complete(&adapter->fw_done);
3384 break;
3385 case QUERY_IP_OFFLOAD_RSP:
3386 netdev_dbg(netdev, "Got Query IP offload Response\n");
3387 handle_query_ip_offload_rsp(adapter);
3388 break;
3389 case MULTICAST_CTRL_RSP:
3390 netdev_dbg(netdev, "Got multicast control Response\n");
3391 break;
3392 case CONTROL_IP_OFFLOAD_RSP:
3393 netdev_dbg(netdev, "Got Control IP offload Response\n");
3394 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3395 sizeof(adapter->ip_offload_ctrl),
3396 DMA_TO_DEVICE);
3397 /* We're done with the queries, perform the login */
3398 send_login(adapter);
3399 break;
3400 case REQUEST_RAS_COMP_NUM_RSP:
3401 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3402 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3403 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3404 break;
3405 }
3406 adapter->ras_comp_num =
3407 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3408 handle_request_ras_comp_num_rsp(crq, adapter);
3409 break;
3410 case REQUEST_RAS_COMPS_RSP:
3411 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3412 handle_request_ras_comps_rsp(crq, adapter);
3413 break;
3414 case CONTROL_RAS_RSP:
3415 netdev_dbg(netdev, "Got Control RAS Response\n");
3416 handle_control_ras_rsp(crq, adapter);
3417 break;
3418 case COLLECT_FW_TRACE_RSP:
3419 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3420 complete(&adapter->fw_done);
3421 break;
3422 default:
3423 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3424 gen_crq->cmd);
3425 }
3426 }
3427
3428 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3429 {
3430 struct ibmvnic_adapter *adapter = instance;
3431 unsigned long flags;
3432
3433 spin_lock_irqsave(&adapter->crq.lock, flags);
3434 vio_disable_interrupts(adapter->vdev);
3435 tasklet_schedule(&adapter->tasklet);
3436 spin_unlock_irqrestore(&adapter->crq.lock, flags);
3437 return IRQ_HANDLED;
3438 }
3439
3440 static void ibmvnic_tasklet(void *data)
3441 {
3442 struct ibmvnic_adapter *adapter = data;
3443 struct ibmvnic_crq_queue *queue = &adapter->crq;
3444 struct vio_dev *vdev = adapter->vdev;
3445 union ibmvnic_crq *crq;
3446 unsigned long flags;
3447 bool done = false;
3448
3449 spin_lock_irqsave(&queue->lock, flags);
3450 vio_disable_interrupts(vdev);
3451 while (!done) {
3452 /* Pull all the valid messages off the CRQ */
3453 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3454 ibmvnic_handle_crq(crq, adapter);
3455 crq->generic.first = 0;
3456 }
3457 vio_enable_interrupts(vdev);
3458 crq = ibmvnic_next_crq(adapter);
3459 if (crq) {
3460 vio_disable_interrupts(vdev);
3461 ibmvnic_handle_crq(crq, adapter);
3462 crq->generic.first = 0;
3463 } else {
3464 /* remain in tasklet until all
3465 * capabilities responses are received
3466 */
3467 if (!adapter->wait_capability)
3468 done = true;
3469 }
3470 }
3471 /* if capabilities CRQ's were sent in this tasklet, the following
3472 * tasklet must wait until all responses are received
3473 */
3474 if (atomic_read(&adapter->running_cap_crqs) != 0)
3475 adapter->wait_capability = true;
3476 spin_unlock_irqrestore(&queue->lock, flags);
3477 }
3478
3479 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3480 {
3481 struct vio_dev *vdev = adapter->vdev;
3482 int rc;
3483
3484 do {
3485 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3486 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3487
3488 if (rc)
3489 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3490
3491 return rc;
3492 }
3493
3494 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3495 {
3496 struct ibmvnic_crq_queue *crq = &adapter->crq;
3497 struct device *dev = &adapter->vdev->dev;
3498 struct vio_dev *vdev = adapter->vdev;
3499 int rc;
3500
3501 /* Close the CRQ */
3502 do {
3503 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3504 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3505
3506 /* Clean out the queue */
3507 memset(crq->msgs, 0, PAGE_SIZE);
3508 crq->cur = 0;
3509
3510 /* And re-open it again */
3511 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3512 crq->msg_token, PAGE_SIZE);
3513
3514 if (rc == H_CLOSED)
3515 /* Adapter is good, but other end is not ready */
3516 dev_warn(dev, "Partner adapter not ready\n");
3517 else if (rc != 0)
3518 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3519
3520 return rc;
3521 }
3522
3523 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3524 {
3525 struct ibmvnic_crq_queue *crq = &adapter->crq;
3526 struct vio_dev *vdev = adapter->vdev;
3527 long rc;
3528
3529 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3530 free_irq(vdev->irq, adapter);
3531 tasklet_kill(&adapter->tasklet);
3532 do {
3533 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3534 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3535
3536 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3537 DMA_BIDIRECTIONAL);
3538 free_page((unsigned long)crq->msgs);
3539 }
3540
3541 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3542 {
3543 struct ibmvnic_crq_queue *crq = &adapter->crq;
3544 struct device *dev = &adapter->vdev->dev;
3545 struct vio_dev *vdev = adapter->vdev;
3546 int rc, retrc = -ENOMEM;
3547
3548 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3549 /* Should we allocate more than one page? */
3550
3551 if (!crq->msgs)
3552 return -ENOMEM;
3553
3554 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3555 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3556 DMA_BIDIRECTIONAL);
3557 if (dma_mapping_error(dev, crq->msg_token))
3558 goto map_failed;
3559
3560 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3561 crq->msg_token, PAGE_SIZE);
3562
3563 if (rc == H_RESOURCE)
3564 /* maybe kexecing and resource is busy. try a reset */
3565 rc = ibmvnic_reset_crq(adapter);
3566 retrc = rc;
3567
3568 if (rc == H_CLOSED) {
3569 dev_warn(dev, "Partner adapter not ready\n");
3570 } else if (rc) {
3571 dev_warn(dev, "Error %d opening adapter\n", rc);
3572 goto reg_crq_failed;
3573 }
3574
3575 retrc = 0;
3576
3577 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3578 (unsigned long)adapter);
3579
3580 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3581 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3582 adapter);
3583 if (rc) {
3584 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3585 vdev->irq, rc);
3586 goto req_irq_failed;
3587 }
3588
3589 rc = vio_enable_interrupts(vdev);
3590 if (rc) {
3591 dev_err(dev, "Error %d enabling interrupts\n", rc);
3592 goto req_irq_failed;
3593 }
3594
3595 crq->cur = 0;
3596 spin_lock_init(&crq->lock);
3597
3598 return retrc;
3599
3600 req_irq_failed:
3601 tasklet_kill(&adapter->tasklet);
3602 do {
3603 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3604 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3605 reg_crq_failed:
3606 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3607 map_failed:
3608 free_page((unsigned long)crq->msgs);
3609 return retrc;
3610 }
3611
3612 /* debugfs for dump */
3613 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3614 {
3615 struct net_device *netdev = seq->private;
3616 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3617 struct device *dev = &adapter->vdev->dev;
3618 union ibmvnic_crq crq;
3619
3620 memset(&crq, 0, sizeof(crq));
3621 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3622 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3623
3624 init_completion(&adapter->fw_done);
3625 ibmvnic_send_crq(adapter, &crq);
3626 wait_for_completion(&adapter->fw_done);
3627
3628 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3629
3630 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3631 DMA_BIDIRECTIONAL);
3632
3633 kfree(adapter->dump_data);
3634
3635 return 0;
3636 }
3637
3638 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3639 {
3640 return single_open(file, ibmvnic_dump_show, inode->i_private);
3641 }
3642
3643 static const struct file_operations ibmvnic_dump_ops = {
3644 .owner = THIS_MODULE,
3645 .open = ibmvnic_dump_open,
3646 .read = seq_read,
3647 .llseek = seq_lseek,
3648 .release = single_release,
3649 };
3650
3651 static void handle_crq_init_rsp(struct work_struct *work)
3652 {
3653 struct ibmvnic_adapter *adapter = container_of(work,
3654 struct ibmvnic_adapter,
3655 vnic_crq_init);
3656 struct device *dev = &adapter->vdev->dev;
3657 struct net_device *netdev = adapter->netdev;
3658 unsigned long timeout = msecs_to_jiffies(30000);
3659 bool restart = false;
3660 int rc;
3661
3662 if (adapter->failover) {
3663 release_sub_crqs(adapter);
3664 if (netif_running(netdev)) {
3665 netif_tx_disable(netdev);
3666 ibmvnic_close(netdev);
3667 restart = true;
3668 }
3669 }
3670
3671 reinit_completion(&adapter->init_done);
3672 send_version_xchg(adapter);
3673 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3674 dev_err(dev, "Passive init timeout\n");
3675 goto task_failed;
3676 }
3677
3678 do {
3679 if (adapter->renegotiate) {
3680 adapter->renegotiate = false;
3681 release_sub_crqs_no_irqs(adapter);
3682
3683 reinit_completion(&adapter->init_done);
3684 send_cap_queries(adapter);
3685 if (!wait_for_completion_timeout(&adapter->init_done,
3686 timeout)) {
3687 dev_err(dev, "Passive init timeout\n");
3688 goto task_failed;
3689 }
3690 }
3691 } while (adapter->renegotiate);
3692 rc = init_sub_crq_irqs(adapter);
3693
3694 if (rc)
3695 goto task_failed;
3696
3697 netdev->real_num_tx_queues = adapter->req_tx_queues;
3698 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3699
3700 if (adapter->failover) {
3701 adapter->failover = false;
3702 if (restart) {
3703 rc = ibmvnic_open(netdev);
3704 if (rc)
3705 goto restart_failed;
3706 }
3707 netif_carrier_on(netdev);
3708 return;
3709 }
3710
3711 rc = register_netdev(netdev);
3712 if (rc) {
3713 dev_err(dev,
3714 "failed to register netdev rc=%d\n", rc);
3715 goto register_failed;
3716 }
3717 dev_info(dev, "ibmvnic registered\n");
3718
3719 return;
3720
3721 restart_failed:
3722 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3723 register_failed:
3724 release_sub_crqs(adapter);
3725 task_failed:
3726 dev_err(dev, "Passive initialization was not successful\n");
3727 }
3728
3729 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3730 {
3731 unsigned long timeout = msecs_to_jiffies(30000);
3732 struct ibmvnic_adapter *adapter;
3733 struct net_device *netdev;
3734 unsigned char *mac_addr_p;
3735 struct dentry *ent;
3736 char buf[17]; /* debugfs name buf */
3737 int rc;
3738
3739 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3740 dev->unit_address);
3741
3742 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3743 VETH_MAC_ADDR, NULL);
3744 if (!mac_addr_p) {
3745 dev_err(&dev->dev,
3746 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3747 __FILE__, __LINE__);
3748 return 0;
3749 }
3750
3751 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3752 IBMVNIC_MAX_TX_QUEUES);
3753 if (!netdev)
3754 return -ENOMEM;
3755
3756 adapter = netdev_priv(netdev);
3757 dev_set_drvdata(&dev->dev, netdev);
3758 adapter->vdev = dev;
3759 adapter->netdev = netdev;
3760 adapter->failover = false;
3761
3762 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3763 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3764 netdev->irq = dev->irq;
3765 netdev->netdev_ops = &ibmvnic_netdev_ops;
3766 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3767 SET_NETDEV_DEV(netdev, &dev->dev);
3768
3769 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3770 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3771
3772 spin_lock_init(&adapter->stats_lock);
3773
3774 rc = ibmvnic_init_crq_queue(adapter);
3775 if (rc) {
3776 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3777 goto free_netdev;
3778 }
3779
3780 INIT_LIST_HEAD(&adapter->errors);
3781 INIT_LIST_HEAD(&adapter->inflight);
3782 spin_lock_init(&adapter->error_list_lock);
3783 spin_lock_init(&adapter->inflight_lock);
3784
3785 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3786 sizeof(struct ibmvnic_statistics),
3787 DMA_FROM_DEVICE);
3788 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3789 if (!firmware_has_feature(FW_FEATURE_CMO))
3790 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3791 rc = -ENOMEM;
3792 goto free_crq;
3793 }
3794
3795 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3796 ent = debugfs_create_dir(buf, NULL);
3797 if (!ent || IS_ERR(ent)) {
3798 dev_info(&dev->dev, "debugfs create directory failed\n");
3799 adapter->debugfs_dir = NULL;
3800 } else {
3801 adapter->debugfs_dir = ent;
3802 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3803 netdev, &ibmvnic_dump_ops);
3804 if (!ent || IS_ERR(ent)) {
3805 dev_info(&dev->dev,
3806 "debugfs create dump file failed\n");
3807 adapter->debugfs_dump = NULL;
3808 } else {
3809 adapter->debugfs_dump = ent;
3810 }
3811 }
3812
3813 init_completion(&adapter->init_done);
3814 ibmvnic_send_crq_init(adapter);
3815 if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3816 return 0;
3817
3818 do {
3819 if (adapter->renegotiate) {
3820 adapter->renegotiate = false;
3821 release_sub_crqs_no_irqs(adapter);
3822
3823 reinit_completion(&adapter->init_done);
3824 send_cap_queries(adapter);
3825 if (!wait_for_completion_timeout(&adapter->init_done,
3826 timeout))
3827 return 0;
3828 }
3829 } while (adapter->renegotiate);
3830
3831 rc = init_sub_crq_irqs(adapter);
3832 if (rc) {
3833 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3834 goto free_debugfs;
3835 }
3836
3837 netdev->real_num_tx_queues = adapter->req_tx_queues;
3838 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3839
3840 rc = register_netdev(netdev);
3841 if (rc) {
3842 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3843 goto free_sub_crqs;
3844 }
3845 dev_info(&dev->dev, "ibmvnic registered\n");
3846
3847 return 0;
3848
3849 free_sub_crqs:
3850 release_sub_crqs(adapter);
3851 free_debugfs:
3852 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3853 debugfs_remove_recursive(adapter->debugfs_dir);
3854 free_crq:
3855 ibmvnic_release_crq_queue(adapter);
3856 free_netdev:
3857 free_netdev(netdev);
3858 return rc;
3859 }
3860
3861 static int ibmvnic_remove(struct vio_dev *dev)
3862 {
3863 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3864 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3865
3866 unregister_netdev(netdev);
3867
3868 release_sub_crqs(adapter);
3869
3870 ibmvnic_release_crq_queue(adapter);
3871
3872 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3873 debugfs_remove_recursive(adapter->debugfs_dir);
3874
3875 dma_unmap_single(&dev->dev, adapter->stats_token,
3876 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3877
3878 if (adapter->ras_comps)
3879 dma_free_coherent(&dev->dev,
3880 adapter->ras_comp_num *
3881 sizeof(struct ibmvnic_fw_component),
3882 adapter->ras_comps, adapter->ras_comps_tok);
3883
3884 kfree(adapter->ras_comp_int);
3885
3886 free_netdev(netdev);
3887 dev_set_drvdata(&dev->dev, NULL);
3888
3889 return 0;
3890 }
3891
3892 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3893 {
3894 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3895 struct ibmvnic_adapter *adapter;
3896 struct iommu_table *tbl;
3897 unsigned long ret = 0;
3898 int i;
3899
3900 tbl = get_iommu_table_base(&vdev->dev);
3901
3902 /* netdev inits at probe time along with the structures we need below*/
3903 if (!netdev)
3904 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3905
3906 adapter = netdev_priv(netdev);
3907
3908 ret += PAGE_SIZE; /* the crq message queue */
3909 ret += adapter->bounce_buffer_size;
3910 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3911
3912 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3913 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3914
3915 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3916 i++)
3917 ret += adapter->rx_pool[i].size *
3918 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3919
3920 return ret;
3921 }
3922
3923 static int ibmvnic_resume(struct device *dev)
3924 {
3925 struct net_device *netdev = dev_get_drvdata(dev);
3926 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3927 int i;
3928
3929 /* kick the interrupt handlers just in case we lost an interrupt */
3930 for (i = 0; i < adapter->req_rx_queues; i++)
3931 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3932 adapter->rx_scrq[i]);
3933
3934 return 0;
3935 }
3936
3937 static struct vio_device_id ibmvnic_device_table[] = {
3938 {"network", "IBM,vnic"},
3939 {"", "" }
3940 };
3941 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3942
3943 static const struct dev_pm_ops ibmvnic_pm_ops = {
3944 .resume = ibmvnic_resume
3945 };
3946
3947 static struct vio_driver ibmvnic_driver = {
3948 .id_table = ibmvnic_device_table,
3949 .probe = ibmvnic_probe,
3950 .remove = ibmvnic_remove,
3951 .get_desired_dma = ibmvnic_get_desired_dma,
3952 .name = ibmvnic_driver_name,
3953 .pm = &ibmvnic_pm_ops,
3954 };
3955
3956 /* module functions */
3957 static int __init ibmvnic_module_init(void)
3958 {
3959 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3960 IBMVNIC_DRIVER_VERSION);
3961
3962 return vio_register_driver(&ibmvnic_driver);
3963 }
3964
3965 static void __exit ibmvnic_module_exit(void)
3966 {
3967 vio_unregister_driver(&ibmvnic_driver);
3968 }
3969
3970 module_init(ibmvnic_module_init);
3971 module_exit(ibmvnic_module_exit);
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