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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / net / ethernet / ibm / ibmvnic.c
blob6e9e16eee5d0eff7d74a2eff4a8a4bb91368afcd
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/irq.h>
65 #include <linux/kthread.h>
66 #include <linux/seq_file.h>
67 #include <linux/debugfs.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
72 #include <asm/vio.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/seq_file.h>
77
78 #include "ibmvnic.h"
79
80 static const char ibmvnic_driver_name[] = "ibmvnic";
81 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
82
83 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
84 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
85 MODULE_LICENSE("GPL");
86 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
87
88 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
89 static int ibmvnic_remove(struct vio_dev *);
90 static void release_sub_crqs(struct ibmvnic_adapter *);
91 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
92 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
93 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
94 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
95 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
96 union sub_crq *sub_crq);
97 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
98 static int enable_scrq_irq(struct ibmvnic_adapter *,
99 struct ibmvnic_sub_crq_queue *);
100 static int disable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102 static int pending_scrq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int ibmvnic_poll(struct napi_struct *napi, int data);
107 static void send_map_query(struct ibmvnic_adapter *adapter);
108 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
109 static void send_request_unmap(struct ibmvnic_adapter *, u8);
110
111 struct ibmvnic_stat {
112 char name[ETH_GSTRING_LEN];
113 int offset;
114 };
115
116 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
117 offsetof(struct ibmvnic_statistics, stat))
118 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
119
120 static const struct ibmvnic_stat ibmvnic_stats[] = {
121 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
122 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
123 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
124 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
125 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
126 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
127 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
128 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
129 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
130 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
131 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
132 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
133 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
134 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
135 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
136 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
137 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
138 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
139 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
140 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
141 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
142 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
143 };
144
145 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
146 unsigned long length, unsigned long *number,
147 unsigned long *irq)
148 {
149 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
150 long rc;
151
152 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
153 *number = retbuf[0];
154 *irq = retbuf[1];
155
156 return rc;
157 }
158
159 /* net_device_ops functions */
160
161 static void init_rx_pool(struct ibmvnic_adapter *adapter,
162 struct ibmvnic_rx_pool *rx_pool, int num, int index,
163 int buff_size, int active)
164 {
165 netdev_dbg(adapter->netdev,
166 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
167 index, num, buff_size);
168 rx_pool->size = num;
169 rx_pool->index = index;
170 rx_pool->buff_size = buff_size;
171 rx_pool->active = active;
172 }
173
174 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
175 struct ibmvnic_long_term_buff *ltb, int size)
176 {
177 struct device *dev = &adapter->vdev->dev;
178
179 ltb->size = size;
180 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
181 GFP_KERNEL);
182
183 if (!ltb->buff) {
184 dev_err(dev, "Couldn't alloc long term buffer\n");
185 return -ENOMEM;
186 }
187 ltb->map_id = adapter->map_id;
188 adapter->map_id++;
189 send_request_map(adapter, ltb->addr,
190 ltb->size, ltb->map_id);
191 init_completion(&adapter->fw_done);
192 wait_for_completion(&adapter->fw_done);
193 return 0;
194 }
195
196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
198 {
199 struct device *dev = &adapter->vdev->dev;
200
201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
202 send_request_unmap(adapter, ltb->map_id);
203 }
204
205 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
206 struct ibmvnic_rx_pool *pool)
207 {
208 struct device *dev = &adapter->vdev->dev;
209 int i;
210
211 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
212 if (!pool->free_map)
213 return -ENOMEM;
214
215 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
216 GFP_KERNEL);
217
218 if (!pool->rx_buff) {
219 dev_err(dev, "Couldn't alloc rx buffers\n");
220 kfree(pool->free_map);
221 return -ENOMEM;
222 }
223
224 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
225 pool->size * pool->buff_size)) {
226 kfree(pool->free_map);
227 kfree(pool->rx_buff);
228 return -ENOMEM;
229 }
230
231 for (i = 0; i < pool->size; ++i)
232 pool->free_map[i] = i;
233
234 atomic_set(&pool->available, 0);
235 pool->next_alloc = 0;
236 pool->next_free = 0;
237
238 return 0;
239 }
240
241 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
242 struct ibmvnic_rx_pool *pool)
243 {
244 int count = pool->size - atomic_read(&pool->available);
245 struct device *dev = &adapter->vdev->dev;
246 int buffers_added = 0;
247 unsigned long lpar_rc;
248 union sub_crq sub_crq;
249 struct sk_buff *skb;
250 unsigned int offset;
251 dma_addr_t dma_addr;
252 unsigned char *dst;
253 u64 *handle_array;
254 int shift = 0;
255 int index;
256 int i;
257
258 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
259 be32_to_cpu(adapter->login_rsp_buf->
260 off_rxadd_subcrqs));
261
262 for (i = 0; i < count; ++i) {
263 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
264 if (!skb) {
265 dev_err(dev, "Couldn't replenish rx buff\n");
266 adapter->replenish_no_mem++;
267 break;
268 }
269
270 index = pool->free_map[pool->next_free];
271
272 if (pool->rx_buff[index].skb)
273 dev_err(dev, "Inconsistent free_map!\n");
274
275 /* Copy the skb to the long term mapped DMA buffer */
276 offset = index * pool->buff_size;
277 dst = pool->long_term_buff.buff + offset;
278 memset(dst, 0, pool->buff_size);
279 dma_addr = pool->long_term_buff.addr + offset;
280 pool->rx_buff[index].data = dst;
281
282 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
283 pool->rx_buff[index].dma = dma_addr;
284 pool->rx_buff[index].skb = skb;
285 pool->rx_buff[index].pool_index = pool->index;
286 pool->rx_buff[index].size = pool->buff_size;
287
288 memset(&sub_crq, 0, sizeof(sub_crq));
289 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
290 sub_crq.rx_add.correlator =
291 cpu_to_be64((u64)&pool->rx_buff[index]);
292 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
293 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
294
295 /* The length field of the sCRQ is defined to be 24 bits so the
296 * buffer size needs to be left shifted by a byte before it is
297 * converted to big endian to prevent the last byte from being
298 * truncated.
299 */
300 #ifdef __LITTLE_ENDIAN__
301 shift = 8;
302 #endif
303 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
304
305 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
306 &sub_crq);
307 if (lpar_rc != H_SUCCESS)
308 goto failure;
309
310 buffers_added++;
311 adapter->replenish_add_buff_success++;
312 pool->next_free = (pool->next_free + 1) % pool->size;
313 }
314 atomic_add(buffers_added, &pool->available);
315 return;
316
317 failure:
318 dev_info(dev, "replenish pools failure\n");
319 pool->free_map[pool->next_free] = index;
320 pool->rx_buff[index].skb = NULL;
321 if (!dma_mapping_error(dev, dma_addr))
322 dma_unmap_single(dev, dma_addr, pool->buff_size,
323 DMA_FROM_DEVICE);
324
325 dev_kfree_skb_any(skb);
326 adapter->replenish_add_buff_failure++;
327 atomic_add(buffers_added, &pool->available);
328 }
329
330 static void replenish_pools(struct ibmvnic_adapter *adapter)
331 {
332 int i;
333
334 if (adapter->migrated)
335 return;
336
337 adapter->replenish_task_cycles++;
338 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
339 i++) {
340 if (adapter->rx_pool[i].active)
341 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
342 }
343 }
344
345 static void free_rx_pool(struct ibmvnic_adapter *adapter,
346 struct ibmvnic_rx_pool *pool)
347 {
348 int i;
349
350 kfree(pool->free_map);
351 pool->free_map = NULL;
352
353 if (!pool->rx_buff)
354 return;
355
356 for (i = 0; i < pool->size; i++) {
357 if (pool->rx_buff[i].skb) {
358 dev_kfree_skb_any(pool->rx_buff[i].skb);
359 pool->rx_buff[i].skb = NULL;
360 }
361 }
362 kfree(pool->rx_buff);
363 pool->rx_buff = NULL;
364 }
365
366 static int ibmvnic_open(struct net_device *netdev)
367 {
368 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
369 struct device *dev = &adapter->vdev->dev;
370 struct ibmvnic_tx_pool *tx_pool;
371 union ibmvnic_crq crq;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int tx_subcrqs;
375 int i, j;
376
377 rxadd_subcrqs =
378 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
379 tx_subcrqs =
380 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
381 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
382 be32_to_cpu(adapter->login_rsp_buf->
383 off_rxadd_buff_size));
384 adapter->map_id = 1;
385 adapter->napi = kcalloc(adapter->req_rx_queues,
386 sizeof(struct napi_struct), GFP_KERNEL);
387 if (!adapter->napi)
388 goto alloc_napi_failed;
389 for (i = 0; i < adapter->req_rx_queues; i++) {
390 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
391 NAPI_POLL_WEIGHT);
392 napi_enable(&adapter->napi[i]);
393 }
394 adapter->rx_pool =
395 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
396
397 if (!adapter->rx_pool)
398 goto rx_pool_arr_alloc_failed;
399 send_map_query(adapter);
400 for (i = 0; i < rxadd_subcrqs; i++) {
401 init_rx_pool(adapter, &adapter->rx_pool[i],
402 IBMVNIC_BUFFS_PER_POOL, i,
403 be64_to_cpu(size_array[i]), 1);
404 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
405 dev_err(dev, "Couldn't alloc rx pool\n");
406 goto rx_pool_alloc_failed;
407 }
408 }
409 adapter->tx_pool =
410 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
411
412 if (!adapter->tx_pool)
413 goto tx_pool_arr_alloc_failed;
414 for (i = 0; i < tx_subcrqs; i++) {
415 tx_pool = &adapter->tx_pool[i];
416 tx_pool->tx_buff =
417 kcalloc(adapter->max_tx_entries_per_subcrq,
418 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
419 if (!tx_pool->tx_buff)
420 goto tx_pool_alloc_failed;
421
422 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
423 adapter->max_tx_entries_per_subcrq *
424 adapter->req_mtu))
425 goto tx_ltb_alloc_failed;
426
427 tx_pool->free_map =
428 kcalloc(adapter->max_tx_entries_per_subcrq,
429 sizeof(int), GFP_KERNEL);
430 if (!tx_pool->free_map)
431 goto tx_fm_alloc_failed;
432
433 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
434 tx_pool->free_map[j] = j;
435
436 tx_pool->consumer_index = 0;
437 tx_pool->producer_index = 0;
438 }
439 adapter->bounce_buffer_size =
440 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
441 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
442 GFP_KERNEL);
443 if (!adapter->bounce_buffer)
444 goto bounce_alloc_failed;
445
446 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
447 adapter->bounce_buffer_size,
448 DMA_TO_DEVICE);
449 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
450 dev_err(dev, "Couldn't map tx bounce buffer\n");
451 goto bounce_map_failed;
452 }
453 replenish_pools(adapter);
454
455 /* We're ready to receive frames, enable the sub-crq interrupts and
456 * set the logical link state to up
457 */
458 for (i = 0; i < adapter->req_rx_queues; i++)
459 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
460
461 for (i = 0; i < adapter->req_tx_queues; i++)
462 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
463
464 memset(&crq, 0, sizeof(crq));
465 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
466 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
467 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
468 ibmvnic_send_crq(adapter, &crq);
469
470 netif_start_queue(netdev);
471 return 0;
472
473 bounce_map_failed:
474 kfree(adapter->bounce_buffer);
475 bounce_alloc_failed:
476 i = tx_subcrqs - 1;
477 kfree(adapter->tx_pool[i].free_map);
478 tx_fm_alloc_failed:
479 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
480 tx_ltb_alloc_failed:
481 kfree(adapter->tx_pool[i].tx_buff);
482 tx_pool_alloc_failed:
483 for (j = 0; j < i; j++) {
484 kfree(adapter->tx_pool[j].tx_buff);
485 free_long_term_buff(adapter,
486 &adapter->tx_pool[j].long_term_buff);
487 kfree(adapter->tx_pool[j].free_map);
488 }
489 kfree(adapter->tx_pool);
490 adapter->tx_pool = NULL;
491 tx_pool_arr_alloc_failed:
492 i = rxadd_subcrqs;
493 rx_pool_alloc_failed:
494 for (j = 0; j < i; j++) {
495 free_rx_pool(adapter, &adapter->rx_pool[j]);
496 free_long_term_buff(adapter,
497 &adapter->rx_pool[j].long_term_buff);
498 }
499 kfree(adapter->rx_pool);
500 adapter->rx_pool = NULL;
501 rx_pool_arr_alloc_failed:
502 for (i = 0; i < adapter->req_rx_queues; i++)
503 napi_enable(&adapter->napi[i]);
504 alloc_napi_failed:
505 return -ENOMEM;
506 }
507
508 static int ibmvnic_close(struct net_device *netdev)
509 {
510 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
511 struct device *dev = &adapter->vdev->dev;
512 union ibmvnic_crq crq;
513 int i;
514
515 adapter->closing = true;
516
517 for (i = 0; i < adapter->req_rx_queues; i++)
518 napi_disable(&adapter->napi[i]);
519
520 netif_stop_queue(netdev);
521
522 if (adapter->bounce_buffer) {
523 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
524 dma_unmap_single(&adapter->vdev->dev,
525 adapter->bounce_buffer_dma,
526 adapter->bounce_buffer_size,
527 DMA_BIDIRECTIONAL);
528 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
529 }
530 kfree(adapter->bounce_buffer);
531 adapter->bounce_buffer = NULL;
532 }
533
534 memset(&crq, 0, sizeof(crq));
535 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
536 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
537 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
538 ibmvnic_send_crq(adapter, &crq);
539
540 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
541 i++) {
542 kfree(adapter->tx_pool[i].tx_buff);
543 free_long_term_buff(adapter,
544 &adapter->tx_pool[i].long_term_buff);
545 kfree(adapter->tx_pool[i].free_map);
546 }
547 kfree(adapter->tx_pool);
548 adapter->tx_pool = NULL;
549
550 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
551 i++) {
552 free_rx_pool(adapter, &adapter->rx_pool[i]);
553 free_long_term_buff(adapter,
554 &adapter->rx_pool[i].long_term_buff);
555 }
556 kfree(adapter->rx_pool);
557 adapter->rx_pool = NULL;
558
559 adapter->closing = false;
560
561 return 0;
562 }
563
564 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
565 {
566 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
567 int queue_num = skb_get_queue_mapping(skb);
568 struct device *dev = &adapter->vdev->dev;
569 struct ibmvnic_tx_buff *tx_buff = NULL;
570 struct ibmvnic_tx_pool *tx_pool;
571 unsigned int tx_send_failed = 0;
572 unsigned int tx_map_failed = 0;
573 unsigned int tx_dropped = 0;
574 unsigned int tx_packets = 0;
575 unsigned int tx_bytes = 0;
576 dma_addr_t data_dma_addr;
577 struct netdev_queue *txq;
578 bool used_bounce = false;
579 unsigned long lpar_rc;
580 union sub_crq tx_crq;
581 unsigned int offset;
582 unsigned char *dst;
583 u64 *handle_array;
584 int index = 0;
585 int ret = 0;
586
587 tx_pool = &adapter->tx_pool[queue_num];
588 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
589 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
590 be32_to_cpu(adapter->login_rsp_buf->
591 off_txsubm_subcrqs));
592 if (adapter->migrated) {
593 tx_send_failed++;
594 tx_dropped++;
595 ret = NETDEV_TX_BUSY;
596 goto out;
597 }
598
599 index = tx_pool->free_map[tx_pool->consumer_index];
600 offset = index * adapter->req_mtu;
601 dst = tx_pool->long_term_buff.buff + offset;
602 memset(dst, 0, adapter->req_mtu);
603 skb_copy_from_linear_data(skb, dst, skb->len);
604 data_dma_addr = tx_pool->long_term_buff.addr + offset;
605
606 tx_pool->consumer_index =
607 (tx_pool->consumer_index + 1) %
608 adapter->max_tx_entries_per_subcrq;
609
610 tx_buff = &tx_pool->tx_buff[index];
611 tx_buff->skb = skb;
612 tx_buff->data_dma[0] = data_dma_addr;
613 tx_buff->data_len[0] = skb->len;
614 tx_buff->index = index;
615 tx_buff->pool_index = queue_num;
616 tx_buff->last_frag = true;
617 tx_buff->used_bounce = used_bounce;
618
619 memset(&tx_crq, 0, sizeof(tx_crq));
620 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
621 tx_crq.v1.type = IBMVNIC_TX_DESC;
622 tx_crq.v1.n_crq_elem = 1;
623 tx_crq.v1.n_sge = 1;
624 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
625 tx_crq.v1.correlator = cpu_to_be32(index);
626 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
627 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
628 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
629
630 if (adapter->vlan_header_insertion) {
631 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
632 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
633 }
634
635 if (skb->protocol == htons(ETH_P_IP)) {
636 if (ip_hdr(skb)->version == 4)
637 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
638 else if (ip_hdr(skb)->version == 6)
639 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
640
641 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
642 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
643 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
644 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
645 }
646
647 if (skb->ip_summed == CHECKSUM_PARTIAL)
648 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
649
650 lpar_rc = send_subcrq(adapter, handle_array[0], &tx_crq);
651
652 if (lpar_rc != H_SUCCESS) {
653 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
654
655 if (tx_pool->consumer_index == 0)
656 tx_pool->consumer_index =
657 adapter->max_tx_entries_per_subcrq - 1;
658 else
659 tx_pool->consumer_index--;
660
661 tx_send_failed++;
662 tx_dropped++;
663 ret = NETDEV_TX_BUSY;
664 goto out;
665 }
666 tx_packets++;
667 tx_bytes += skb->len;
668 txq->trans_start = jiffies;
669 ret = NETDEV_TX_OK;
670
671 out:
672 netdev->stats.tx_dropped += tx_dropped;
673 netdev->stats.tx_bytes += tx_bytes;
674 netdev->stats.tx_packets += tx_packets;
675 adapter->tx_send_failed += tx_send_failed;
676 adapter->tx_map_failed += tx_map_failed;
677
678 return ret;
679 }
680
681 static void ibmvnic_set_multi(struct net_device *netdev)
682 {
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
684 struct netdev_hw_addr *ha;
685 union ibmvnic_crq crq;
686
687 memset(&crq, 0, sizeof(crq));
688 crq.request_capability.first = IBMVNIC_CRQ_CMD;
689 crq.request_capability.cmd = REQUEST_CAPABILITY;
690
691 if (netdev->flags & IFF_PROMISC) {
692 if (!adapter->promisc_supported)
693 return;
694 } else {
695 if (netdev->flags & IFF_ALLMULTI) {
696 /* Accept all multicast */
697 memset(&crq, 0, sizeof(crq));
698 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
699 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
700 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
701 ibmvnic_send_crq(adapter, &crq);
702 } else if (netdev_mc_empty(netdev)) {
703 /* Reject all multicast */
704 memset(&crq, 0, sizeof(crq));
705 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
706 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
707 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
708 ibmvnic_send_crq(adapter, &crq);
709 } else {
710 /* Accept one or more multicast(s) */
711 netdev_for_each_mc_addr(ha, netdev) {
712 memset(&crq, 0, sizeof(crq));
713 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
714 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
715 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
716 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
717 ha->addr);
718 ibmvnic_send_crq(adapter, &crq);
719 }
720 }
721 }
722 }
723
724 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
725 {
726 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
727 struct sockaddr *addr = p;
728 union ibmvnic_crq crq;
729
730 if (!is_valid_ether_addr(addr->sa_data))
731 return -EADDRNOTAVAIL;
732
733 memset(&crq, 0, sizeof(crq));
734 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
735 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
736 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
737 ibmvnic_send_crq(adapter, &crq);
738 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
739 return 0;
740 }
741
742 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
743 {
744 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
745
746 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
747 return -EINVAL;
748
749 netdev->mtu = new_mtu;
750 return 0;
751 }
752
753 static void ibmvnic_tx_timeout(struct net_device *dev)
754 {
755 struct ibmvnic_adapter *adapter = netdev_priv(dev);
756 int rc;
757
758 /* Adapter timed out, resetting it */
759 release_sub_crqs(adapter);
760 rc = ibmvnic_reset_crq(adapter);
761 if (rc)
762 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
763 else
764 ibmvnic_send_crq_init(adapter);
765 }
766
767 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
768 struct ibmvnic_rx_buff *rx_buff)
769 {
770 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
771
772 rx_buff->skb = NULL;
773
774 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
775 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
776
777 atomic_dec(&pool->available);
778 }
779
780 static int ibmvnic_poll(struct napi_struct *napi, int budget)
781 {
782 struct net_device *netdev = napi->dev;
783 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
784 int scrq_num = (int)(napi - adapter->napi);
785 int frames_processed = 0;
786 restart_poll:
787 while (frames_processed < budget) {
788 struct sk_buff *skb;
789 struct ibmvnic_rx_buff *rx_buff;
790 union sub_crq *next;
791 u32 length;
792 u16 offset;
793 u8 flags = 0;
794
795 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
796 break;
797 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
798 rx_buff =
799 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
800 rx_comp.correlator);
801 /* do error checking */
802 if (next->rx_comp.rc) {
803 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
804 /* free the entry */
805 next->rx_comp.first = 0;
806 remove_buff_from_pool(adapter, rx_buff);
807 break;
808 }
809
810 length = be32_to_cpu(next->rx_comp.len);
811 offset = be16_to_cpu(next->rx_comp.off_frame_data);
812 flags = next->rx_comp.flags;
813 skb = rx_buff->skb;
814 skb_copy_to_linear_data(skb, rx_buff->data + offset,
815 length);
816 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
817 /* free the entry */
818 next->rx_comp.first = 0;
819 remove_buff_from_pool(adapter, rx_buff);
820
821 skb_put(skb, length);
822 skb->protocol = eth_type_trans(skb, netdev);
823
824 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
825 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
826 skb->ip_summed = CHECKSUM_UNNECESSARY;
827 }
828
829 length = skb->len;
830 napi_gro_receive(napi, skb); /* send it up */
831 netdev->stats.rx_packets++;
832 netdev->stats.rx_bytes += length;
833 frames_processed++;
834 }
835 replenish_pools(adapter);
836
837 if (frames_processed < budget) {
838 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
839 napi_complete(napi);
840 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
841 napi_reschedule(napi)) {
842 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
843 goto restart_poll;
844 }
845 }
846 return frames_processed;
847 }
848
849 #ifdef CONFIG_NET_POLL_CONTROLLER
850 static void ibmvnic_netpoll_controller(struct net_device *dev)
851 {
852 struct ibmvnic_adapter *adapter = netdev_priv(dev);
853 int i;
854
855 replenish_pools(netdev_priv(dev));
856 for (i = 0; i < adapter->req_rx_queues; i++)
857 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
858 adapter->rx_scrq[i]);
859 }
860 #endif
861
862 static const struct net_device_ops ibmvnic_netdev_ops = {
863 .ndo_open = ibmvnic_open,
864 .ndo_stop = ibmvnic_close,
865 .ndo_start_xmit = ibmvnic_xmit,
866 .ndo_set_rx_mode = ibmvnic_set_multi,
867 .ndo_set_mac_address = ibmvnic_set_mac,
868 .ndo_validate_addr = eth_validate_addr,
869 .ndo_change_mtu = ibmvnic_change_mtu,
870 .ndo_tx_timeout = ibmvnic_tx_timeout,
871 #ifdef CONFIG_NET_POLL_CONTROLLER
872 .ndo_poll_controller = ibmvnic_netpoll_controller,
873 #endif
874 };
875
876 /* ethtool functions */
877
878 static int ibmvnic_get_settings(struct net_device *netdev,
879 struct ethtool_cmd *cmd)
880 {
881 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
882 SUPPORTED_FIBRE);
883 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
884 ADVERTISED_FIBRE);
885 ethtool_cmd_speed_set(cmd, SPEED_1000);
886 cmd->duplex = DUPLEX_FULL;
887 cmd->port = PORT_FIBRE;
888 cmd->phy_address = 0;
889 cmd->transceiver = XCVR_INTERNAL;
890 cmd->autoneg = AUTONEG_ENABLE;
891 cmd->maxtxpkt = 0;
892 cmd->maxrxpkt = 1;
893 return 0;
894 }
895
896 static void ibmvnic_get_drvinfo(struct net_device *dev,
897 struct ethtool_drvinfo *info)
898 {
899 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
900 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
901 }
902
903 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
904 {
905 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
906
907 return adapter->msg_enable;
908 }
909
910 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
911 {
912 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
913
914 adapter->msg_enable = data;
915 }
916
917 static u32 ibmvnic_get_link(struct net_device *netdev)
918 {
919 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
920
921 /* Don't need to send a query because we request a logical link up at
922 * init and then we wait for link state indications
923 */
924 return adapter->logical_link_state;
925 }
926
927 static void ibmvnic_get_ringparam(struct net_device *netdev,
928 struct ethtool_ringparam *ring)
929 {
930 ring->rx_max_pending = 0;
931 ring->tx_max_pending = 0;
932 ring->rx_mini_max_pending = 0;
933 ring->rx_jumbo_max_pending = 0;
934 ring->rx_pending = 0;
935 ring->tx_pending = 0;
936 ring->rx_mini_pending = 0;
937 ring->rx_jumbo_pending = 0;
938 }
939
940 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
941 {
942 int i;
943
944 if (stringset != ETH_SS_STATS)
945 return;
946
947 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
948 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
949 }
950
951 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
952 {
953 switch (sset) {
954 case ETH_SS_STATS:
955 return ARRAY_SIZE(ibmvnic_stats);
956 default:
957 return -EOPNOTSUPP;
958 }
959 }
960
961 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
962 struct ethtool_stats *stats, u64 *data)
963 {
964 struct ibmvnic_adapter *adapter = netdev_priv(dev);
965 union ibmvnic_crq crq;
966 int i;
967
968 memset(&crq, 0, sizeof(crq));
969 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
970 crq.request_statistics.cmd = REQUEST_STATISTICS;
971 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
972 crq.request_statistics.len =
973 cpu_to_be32(sizeof(struct ibmvnic_statistics));
974 ibmvnic_send_crq(adapter, &crq);
975
976 /* Wait for data to be written */
977 init_completion(&adapter->stats_done);
978 wait_for_completion(&adapter->stats_done);
979
980 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
981 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
982 }
983
984 static const struct ethtool_ops ibmvnic_ethtool_ops = {
985 .get_settings = ibmvnic_get_settings,
986 .get_drvinfo = ibmvnic_get_drvinfo,
987 .get_msglevel = ibmvnic_get_msglevel,
988 .set_msglevel = ibmvnic_set_msglevel,
989 .get_link = ibmvnic_get_link,
990 .get_ringparam = ibmvnic_get_ringparam,
991 .get_strings = ibmvnic_get_strings,
992 .get_sset_count = ibmvnic_get_sset_count,
993 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
994 };
995
996 /* Routines for managing CRQs/sCRQs */
997
998 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
999 struct ibmvnic_sub_crq_queue *scrq)
1000 {
1001 struct device *dev = &adapter->vdev->dev;
1002 long rc;
1003
1004 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1005
1006 /* Close the sub-crqs */
1007 do {
1008 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1009 adapter->vdev->unit_address,
1010 scrq->crq_num);
1011 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1012
1013 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1014 DMA_BIDIRECTIONAL);
1015 free_pages((unsigned long)scrq->msgs, 2);
1016 kfree(scrq);
1017 }
1018
1019 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1020 *adapter)
1021 {
1022 struct device *dev = &adapter->vdev->dev;
1023 struct ibmvnic_sub_crq_queue *scrq;
1024 int rc;
1025
1026 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1027 if (!scrq)
1028 return NULL;
1029
1030 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1031 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1032 if (!scrq->msgs) {
1033 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1034 goto zero_page_failed;
1035 }
1036
1037 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1038 DMA_BIDIRECTIONAL);
1039 if (dma_mapping_error(dev, scrq->msg_token)) {
1040 dev_warn(dev, "Couldn't map crq queue messages page\n");
1041 goto map_failed;
1042 }
1043
1044 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1045 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1046
1047 if (rc == H_RESOURCE)
1048 rc = ibmvnic_reset_crq(adapter);
1049
1050 if (rc == H_CLOSED) {
1051 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1052 } else if (rc) {
1053 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1054 goto reg_failed;
1055 }
1056
1057 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1058 if (scrq->irq == NO_IRQ) {
1059 dev_err(dev, "Error mapping irq\n");
1060 goto map_irq_failed;
1061 }
1062
1063 scrq->adapter = adapter;
1064 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1065 scrq->cur = 0;
1066 scrq->rx_skb_top = NULL;
1067 spin_lock_init(&scrq->lock);
1068
1069 netdev_dbg(adapter->netdev,
1070 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1071 scrq->crq_num, scrq->hw_irq, scrq->irq);
1072
1073 return scrq;
1074
1075 map_irq_failed:
1076 do {
1077 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1078 adapter->vdev->unit_address,
1079 scrq->crq_num);
1080 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1081 reg_failed:
1082 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1083 DMA_BIDIRECTIONAL);
1084 map_failed:
1085 free_pages((unsigned long)scrq->msgs, 2);
1086 zero_page_failed:
1087 kfree(scrq);
1088
1089 return NULL;
1090 }
1091
1092 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1093 {
1094 int i;
1095
1096 if (adapter->tx_scrq) {
1097 for (i = 0; i < adapter->req_tx_queues; i++)
1098 if (adapter->tx_scrq[i]) {
1099 free_irq(adapter->tx_scrq[i]->irq,
1100 adapter->tx_scrq[i]);
1101 release_sub_crq_queue(adapter,
1102 adapter->tx_scrq[i]);
1103 }
1104 adapter->tx_scrq = NULL;
1105 }
1106
1107 if (adapter->rx_scrq) {
1108 for (i = 0; i < adapter->req_rx_queues; i++)
1109 if (adapter->rx_scrq[i]) {
1110 free_irq(adapter->rx_scrq[i]->irq,
1111 adapter->rx_scrq[i]);
1112 release_sub_crq_queue(adapter,
1113 adapter->rx_scrq[i]);
1114 }
1115 adapter->rx_scrq = NULL;
1116 }
1117
1118 adapter->requested_caps = 0;
1119 }
1120
1121 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1122 struct ibmvnic_sub_crq_queue *scrq)
1123 {
1124 struct device *dev = &adapter->vdev->dev;
1125 unsigned long rc;
1126
1127 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1128 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1129 if (rc)
1130 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1131 scrq->hw_irq, rc);
1132 return rc;
1133 }
1134
1135 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1136 struct ibmvnic_sub_crq_queue *scrq)
1137 {
1138 struct device *dev = &adapter->vdev->dev;
1139 unsigned long rc;
1140
1141 if (scrq->hw_irq > 0x100000000ULL) {
1142 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1143 return 1;
1144 }
1145
1146 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1147 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1148 if (rc)
1149 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1150 scrq->hw_irq, rc);
1151 return rc;
1152 }
1153
1154 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1155 struct ibmvnic_sub_crq_queue *scrq)
1156 {
1157 struct device *dev = &adapter->vdev->dev;
1158 struct ibmvnic_tx_buff *txbuff;
1159 union sub_crq *next;
1160 int index;
1161 int i, j;
1162
1163 restart_loop:
1164 while (pending_scrq(adapter, scrq)) {
1165 unsigned int pool = scrq->pool_index;
1166
1167 next = ibmvnic_next_scrq(adapter, scrq);
1168 for (i = 0; i < next->tx_comp.num_comps; i++) {
1169 if (next->tx_comp.rcs[i]) {
1170 dev_err(dev, "tx error %x\n",
1171 next->tx_comp.rcs[i]);
1172 continue;
1173 }
1174 index = be32_to_cpu(next->tx_comp.correlators[i]);
1175 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1176
1177 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1178 if (!txbuff->data_dma[j])
1179 continue;
1180
1181 txbuff->data_dma[j] = 0;
1182 txbuff->used_bounce = false;
1183 }
1184
1185 if (txbuff->last_frag)
1186 dev_kfree_skb_any(txbuff->skb);
1187
1188 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1189 producer_index] = index;
1190 adapter->tx_pool[pool].producer_index =
1191 (adapter->tx_pool[pool].producer_index + 1) %
1192 adapter->max_tx_entries_per_subcrq;
1193 }
1194 /* remove tx_comp scrq*/
1195 next->tx_comp.first = 0;
1196 }
1197
1198 enable_scrq_irq(adapter, scrq);
1199
1200 if (pending_scrq(adapter, scrq)) {
1201 disable_scrq_irq(adapter, scrq);
1202 goto restart_loop;
1203 }
1204
1205 return 0;
1206 }
1207
1208 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1209 {
1210 struct ibmvnic_sub_crq_queue *scrq = instance;
1211 struct ibmvnic_adapter *adapter = scrq->adapter;
1212
1213 disable_scrq_irq(adapter, scrq);
1214 ibmvnic_complete_tx(adapter, scrq);
1215
1216 return IRQ_HANDLED;
1217 }
1218
1219 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1220 {
1221 struct ibmvnic_sub_crq_queue *scrq = instance;
1222 struct ibmvnic_adapter *adapter = scrq->adapter;
1223
1224 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1225 disable_scrq_irq(adapter, scrq);
1226 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1227 }
1228
1229 return IRQ_HANDLED;
1230 }
1231
1232 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1233 {
1234 struct device *dev = &adapter->vdev->dev;
1235 struct ibmvnic_sub_crq_queue **allqueues;
1236 int registered_queues = 0;
1237 union ibmvnic_crq crq;
1238 int total_queues;
1239 int more = 0;
1240 int i, j;
1241 int rc;
1242
1243 if (!retry) {
1244 /* Sub-CRQ entries are 32 byte long */
1245 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1246
1247 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1248 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1249 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1250 goto allqueues_failed;
1251 }
1252
1253 /* Get the minimum between the queried max and the entries
1254 * that fit in our PAGE_SIZE
1255 */
1256 adapter->req_tx_entries_per_subcrq =
1257 adapter->max_tx_entries_per_subcrq > entries_page ?
1258 entries_page : adapter->max_tx_entries_per_subcrq;
1259 adapter->req_rx_add_entries_per_subcrq =
1260 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1261 entries_page : adapter->max_rx_add_entries_per_subcrq;
1262
1263 /* Choosing the maximum number of queues supported by firmware*/
1264 adapter->req_tx_queues = adapter->min_tx_queues;
1265 adapter->req_rx_queues = adapter->min_rx_queues;
1266 adapter->req_rx_add_queues = adapter->min_rx_add_queues;
1267
1268 adapter->req_mtu = adapter->max_mtu;
1269 }
1270
1271 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1272
1273 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1274 if (!allqueues)
1275 goto allqueues_failed;
1276
1277 for (i = 0; i < total_queues; i++) {
1278 allqueues[i] = init_sub_crq_queue(adapter);
1279 if (!allqueues[i]) {
1280 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1281 break;
1282 }
1283 registered_queues++;
1284 }
1285
1286 /* Make sure we were able to register the minimum number of queues */
1287 if (registered_queues <
1288 adapter->min_tx_queues + adapter->min_rx_queues) {
1289 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1290 goto tx_failed;
1291 }
1292
1293 /* Distribute the failed allocated queues*/
1294 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1295 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1296 switch (i % 3) {
1297 case 0:
1298 if (adapter->req_rx_queues > adapter->min_rx_queues)
1299 adapter->req_rx_queues--;
1300 else
1301 more++;
1302 break;
1303 case 1:
1304 if (adapter->req_tx_queues > adapter->min_tx_queues)
1305 adapter->req_tx_queues--;
1306 else
1307 more++;
1308 break;
1309 }
1310 }
1311
1312 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1313 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1314 if (!adapter->tx_scrq)
1315 goto tx_failed;
1316
1317 for (i = 0; i < adapter->req_tx_queues; i++) {
1318 adapter->tx_scrq[i] = allqueues[i];
1319 adapter->tx_scrq[i]->pool_index = i;
1320 rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx,
1321 0, "ibmvnic_tx", adapter->tx_scrq[i]);
1322 if (rc) {
1323 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1324 adapter->tx_scrq[i]->irq, rc);
1325 goto req_tx_irq_failed;
1326 }
1327 }
1328
1329 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1330 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1331 if (!adapter->rx_scrq)
1332 goto rx_failed;
1333
1334 for (i = 0; i < adapter->req_rx_queues; i++) {
1335 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1336 adapter->rx_scrq[i]->scrq_num = i;
1337 rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx,
1338 0, "ibmvnic_rx", adapter->rx_scrq[i]);
1339 if (rc) {
1340 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1341 adapter->rx_scrq[i]->irq, rc);
1342 goto req_rx_irq_failed;
1343 }
1344 }
1345
1346 memset(&crq, 0, sizeof(crq));
1347 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1348 crq.request_capability.cmd = REQUEST_CAPABILITY;
1349
1350 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1351 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1352 ibmvnic_send_crq(adapter, &crq);
1353
1354 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1355 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1356 ibmvnic_send_crq(adapter, &crq);
1357
1358 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1359 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1360 ibmvnic_send_crq(adapter, &crq);
1361
1362 crq.request_capability.capability =
1363 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1364 crq.request_capability.number =
1365 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1366 ibmvnic_send_crq(adapter, &crq);
1367
1368 crq.request_capability.capability =
1369 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1370 crq.request_capability.number =
1371 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1372 ibmvnic_send_crq(adapter, &crq);
1373
1374 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1375 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1376 ibmvnic_send_crq(adapter, &crq);
1377
1378 if (adapter->netdev->flags & IFF_PROMISC) {
1379 if (adapter->promisc_supported) {
1380 crq.request_capability.capability =
1381 cpu_to_be16(PROMISC_REQUESTED);
1382 crq.request_capability.number = cpu_to_be64(1);
1383 ibmvnic_send_crq(adapter, &crq);
1384 }
1385 } else {
1386 crq.request_capability.capability =
1387 cpu_to_be16(PROMISC_REQUESTED);
1388 crq.request_capability.number = cpu_to_be64(0);
1389 ibmvnic_send_crq(adapter, &crq);
1390 }
1391
1392 kfree(allqueues);
1393
1394 return;
1395
1396 req_rx_irq_failed:
1397 for (j = 0; j < i; j++)
1398 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1399 i = adapter->req_tx_queues;
1400 req_tx_irq_failed:
1401 for (j = 0; j < i; j++)
1402 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1403 kfree(adapter->rx_scrq);
1404 adapter->rx_scrq = NULL;
1405 rx_failed:
1406 kfree(adapter->tx_scrq);
1407 adapter->tx_scrq = NULL;
1408 tx_failed:
1409 for (i = 0; i < registered_queues; i++)
1410 release_sub_crq_queue(adapter, allqueues[i]);
1411 kfree(allqueues);
1412 allqueues_failed:
1413 ibmvnic_remove(adapter->vdev);
1414 }
1415
1416 static int pending_scrq(struct ibmvnic_adapter *adapter,
1417 struct ibmvnic_sub_crq_queue *scrq)
1418 {
1419 union sub_crq *entry = &scrq->msgs[scrq->cur];
1420
1421 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1422 return 1;
1423 else
1424 return 0;
1425 }
1426
1427 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1428 struct ibmvnic_sub_crq_queue *scrq)
1429 {
1430 union sub_crq *entry;
1431 unsigned long flags;
1432
1433 spin_lock_irqsave(&scrq->lock, flags);
1434 entry = &scrq->msgs[scrq->cur];
1435 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1436 if (++scrq->cur == scrq->size)
1437 scrq->cur = 0;
1438 } else {
1439 entry = NULL;
1440 }
1441 spin_unlock_irqrestore(&scrq->lock, flags);
1442
1443 return entry;
1444 }
1445
1446 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1447 {
1448 struct ibmvnic_crq_queue *queue = &adapter->crq;
1449 union ibmvnic_crq *crq;
1450
1451 crq = &queue->msgs[queue->cur];
1452 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1453 if (++queue->cur == queue->size)
1454 queue->cur = 0;
1455 } else {
1456 crq = NULL;
1457 }
1458
1459 return crq;
1460 }
1461
1462 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1463 union sub_crq *sub_crq)
1464 {
1465 unsigned int ua = adapter->vdev->unit_address;
1466 struct device *dev = &adapter->vdev->dev;
1467 u64 *u64_crq = (u64 *)sub_crq;
1468 int rc;
1469
1470 netdev_dbg(adapter->netdev,
1471 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1472 (unsigned long int)cpu_to_be64(remote_handle),
1473 (unsigned long int)cpu_to_be64(u64_crq[0]),
1474 (unsigned long int)cpu_to_be64(u64_crq[1]),
1475 (unsigned long int)cpu_to_be64(u64_crq[2]),
1476 (unsigned long int)cpu_to_be64(u64_crq[3]));
1477
1478 /* Make sure the hypervisor sees the complete request */
1479 mb();
1480
1481 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1482 cpu_to_be64(remote_handle),
1483 cpu_to_be64(u64_crq[0]),
1484 cpu_to_be64(u64_crq[1]),
1485 cpu_to_be64(u64_crq[2]),
1486 cpu_to_be64(u64_crq[3]));
1487
1488 if (rc) {
1489 if (rc == H_CLOSED)
1490 dev_warn(dev, "CRQ Queue closed\n");
1491 dev_err(dev, "Send error (rc=%d)\n", rc);
1492 }
1493
1494 return rc;
1495 }
1496
1497 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1498 union ibmvnic_crq *crq)
1499 {
1500 unsigned int ua = adapter->vdev->unit_address;
1501 struct device *dev = &adapter->vdev->dev;
1502 u64 *u64_crq = (u64 *)crq;
1503 int rc;
1504
1505 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1506 (unsigned long int)cpu_to_be64(u64_crq[0]),
1507 (unsigned long int)cpu_to_be64(u64_crq[1]));
1508
1509 /* Make sure the hypervisor sees the complete request */
1510 mb();
1511
1512 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1513 cpu_to_be64(u64_crq[0]),
1514 cpu_to_be64(u64_crq[1]));
1515
1516 if (rc) {
1517 if (rc == H_CLOSED)
1518 dev_warn(dev, "CRQ Queue closed\n");
1519 dev_warn(dev, "Send error (rc=%d)\n", rc);
1520 }
1521
1522 return rc;
1523 }
1524
1525 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1526 {
1527 union ibmvnic_crq crq;
1528
1529 memset(&crq, 0, sizeof(crq));
1530 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1531 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1532 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1533
1534 return ibmvnic_send_crq(adapter, &crq);
1535 }
1536
1537 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1538 {
1539 union ibmvnic_crq crq;
1540
1541 memset(&crq, 0, sizeof(crq));
1542 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1543 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1544 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1545
1546 return ibmvnic_send_crq(adapter, &crq);
1547 }
1548
1549 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1550 {
1551 union ibmvnic_crq crq;
1552
1553 memset(&crq, 0, sizeof(crq));
1554 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1555 crq.version_exchange.cmd = VERSION_EXCHANGE;
1556 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1557
1558 return ibmvnic_send_crq(adapter, &crq);
1559 }
1560
1561 static void send_login(struct ibmvnic_adapter *adapter)
1562 {
1563 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1564 struct ibmvnic_login_buffer *login_buffer;
1565 struct ibmvnic_inflight_cmd *inflight_cmd;
1566 struct device *dev = &adapter->vdev->dev;
1567 dma_addr_t rsp_buffer_token;
1568 dma_addr_t buffer_token;
1569 size_t rsp_buffer_size;
1570 union ibmvnic_crq crq;
1571 unsigned long flags;
1572 size_t buffer_size;
1573 __be64 *tx_list_p;
1574 __be64 *rx_list_p;
1575 int i;
1576
1577 buffer_size =
1578 sizeof(struct ibmvnic_login_buffer) +
1579 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1580
1581 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1582 if (!login_buffer)
1583 goto buf_alloc_failed;
1584
1585 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1586 DMA_TO_DEVICE);
1587 if (dma_mapping_error(dev, buffer_token)) {
1588 dev_err(dev, "Couldn't map login buffer\n");
1589 goto buf_map_failed;
1590 }
1591
1592 rsp_buffer_size =
1593 sizeof(struct ibmvnic_login_rsp_buffer) +
1594 sizeof(u64) * (adapter->req_tx_queues +
1595 adapter->req_rx_queues *
1596 adapter->req_rx_add_queues + adapter->
1597 req_rx_add_queues) +
1598 sizeof(u8) * (IBMVNIC_TX_DESC_VERSIONS);
1599
1600 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1601 if (!login_rsp_buffer)
1602 goto buf_rsp_alloc_failed;
1603
1604 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1605 rsp_buffer_size, DMA_FROM_DEVICE);
1606 if (dma_mapping_error(dev, rsp_buffer_token)) {
1607 dev_err(dev, "Couldn't map login rsp buffer\n");
1608 goto buf_rsp_map_failed;
1609 }
1610 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1611 if (!inflight_cmd) {
1612 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1613 goto inflight_alloc_failed;
1614 }
1615 adapter->login_buf = login_buffer;
1616 adapter->login_buf_token = buffer_token;
1617 adapter->login_buf_sz = buffer_size;
1618 adapter->login_rsp_buf = login_rsp_buffer;
1619 adapter->login_rsp_buf_token = rsp_buffer_token;
1620 adapter->login_rsp_buf_sz = rsp_buffer_size;
1621
1622 login_buffer->len = cpu_to_be32(buffer_size);
1623 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1624 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1625 login_buffer->off_txcomp_subcrqs =
1626 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1627 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1628 login_buffer->off_rxcomp_subcrqs =
1629 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1630 sizeof(u64) * adapter->req_tx_queues);
1631 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1632 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1633
1634 tx_list_p = (__be64 *)((char *)login_buffer +
1635 sizeof(struct ibmvnic_login_buffer));
1636 rx_list_p = (__be64 *)((char *)login_buffer +
1637 sizeof(struct ibmvnic_login_buffer) +
1638 sizeof(u64) * adapter->req_tx_queues);
1639
1640 for (i = 0; i < adapter->req_tx_queues; i++) {
1641 if (adapter->tx_scrq[i]) {
1642 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1643 crq_num);
1644 }
1645 }
1646
1647 for (i = 0; i < adapter->req_rx_queues; i++) {
1648 if (adapter->rx_scrq[i]) {
1649 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1650 crq_num);
1651 }
1652 }
1653
1654 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1655 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1656 netdev_dbg(adapter->netdev, "%016lx\n",
1657 ((unsigned long int *)(adapter->login_buf))[i]);
1658 }
1659
1660 memset(&crq, 0, sizeof(crq));
1661 crq.login.first = IBMVNIC_CRQ_CMD;
1662 crq.login.cmd = LOGIN;
1663 crq.login.ioba = cpu_to_be32(buffer_token);
1664 crq.login.len = cpu_to_be32(buffer_size);
1665
1666 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1667
1668 spin_lock_irqsave(&adapter->inflight_lock, flags);
1669 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1670 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1671
1672 ibmvnic_send_crq(adapter, &crq);
1673
1674 return;
1675
1676 inflight_alloc_failed:
1677 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1678 DMA_FROM_DEVICE);
1679 buf_rsp_map_failed:
1680 kfree(login_rsp_buffer);
1681 buf_rsp_alloc_failed:
1682 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1683 buf_map_failed:
1684 kfree(login_buffer);
1685 buf_alloc_failed:
1686 return;
1687 }
1688
1689 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1690 u32 len, u8 map_id)
1691 {
1692 union ibmvnic_crq crq;
1693
1694 memset(&crq, 0, sizeof(crq));
1695 crq.request_map.first = IBMVNIC_CRQ_CMD;
1696 crq.request_map.cmd = REQUEST_MAP;
1697 crq.request_map.map_id = map_id;
1698 crq.request_map.ioba = cpu_to_be32(addr);
1699 crq.request_map.len = cpu_to_be32(len);
1700 ibmvnic_send_crq(adapter, &crq);
1701 }
1702
1703 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1704 {
1705 union ibmvnic_crq crq;
1706
1707 memset(&crq, 0, sizeof(crq));
1708 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1709 crq.request_unmap.cmd = REQUEST_UNMAP;
1710 crq.request_unmap.map_id = map_id;
1711 ibmvnic_send_crq(adapter, &crq);
1712 }
1713
1714 static void send_map_query(struct ibmvnic_adapter *adapter)
1715 {
1716 union ibmvnic_crq crq;
1717
1718 memset(&crq, 0, sizeof(crq));
1719 crq.query_map.first = IBMVNIC_CRQ_CMD;
1720 crq.query_map.cmd = QUERY_MAP;
1721 ibmvnic_send_crq(adapter, &crq);
1722 }
1723
1724 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1725 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1726 {
1727 union ibmvnic_crq crq;
1728
1729 atomic_set(&adapter->running_cap_queries, 0);
1730 memset(&crq, 0, sizeof(crq));
1731 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1732 crq.query_capability.cmd = QUERY_CAPABILITY;
1733
1734 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1735 atomic_inc(&adapter->running_cap_queries);
1736 ibmvnic_send_crq(adapter, &crq);
1737
1738 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1739 atomic_inc(&adapter->running_cap_queries);
1740 ibmvnic_send_crq(adapter, &crq);
1741
1742 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1743 atomic_inc(&adapter->running_cap_queries);
1744 ibmvnic_send_crq(adapter, &crq);
1745
1746 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1747 atomic_inc(&adapter->running_cap_queries);
1748 ibmvnic_send_crq(adapter, &crq);
1749
1750 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1751 atomic_inc(&adapter->running_cap_queries);
1752 ibmvnic_send_crq(adapter, &crq);
1753
1754 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1755 atomic_inc(&adapter->running_cap_queries);
1756 ibmvnic_send_crq(adapter, &crq);
1757
1758 crq.query_capability.capability =
1759 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1760 atomic_inc(&adapter->running_cap_queries);
1761 ibmvnic_send_crq(adapter, &crq);
1762
1763 crq.query_capability.capability =
1764 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1765 atomic_inc(&adapter->running_cap_queries);
1766 ibmvnic_send_crq(adapter, &crq);
1767
1768 crq.query_capability.capability =
1769 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1770 atomic_inc(&adapter->running_cap_queries);
1771 ibmvnic_send_crq(adapter, &crq);
1772
1773 crq.query_capability.capability =
1774 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
1775 atomic_inc(&adapter->running_cap_queries);
1776 ibmvnic_send_crq(adapter, &crq);
1777
1778 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
1779 atomic_inc(&adapter->running_cap_queries);
1780 ibmvnic_send_crq(adapter, &crq);
1781
1782 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
1783 atomic_inc(&adapter->running_cap_queries);
1784 ibmvnic_send_crq(adapter, &crq);
1785
1786 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
1787 atomic_inc(&adapter->running_cap_queries);
1788 ibmvnic_send_crq(adapter, &crq);
1789
1790 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
1791 atomic_inc(&adapter->running_cap_queries);
1792 ibmvnic_send_crq(adapter, &crq);
1793
1794 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
1795 atomic_inc(&adapter->running_cap_queries);
1796 ibmvnic_send_crq(adapter, &crq);
1797
1798 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
1799 atomic_inc(&adapter->running_cap_queries);
1800 ibmvnic_send_crq(adapter, &crq);
1801
1802 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
1803 atomic_inc(&adapter->running_cap_queries);
1804 ibmvnic_send_crq(adapter, &crq);
1805
1806 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
1807 atomic_inc(&adapter->running_cap_queries);
1808 ibmvnic_send_crq(adapter, &crq);
1809
1810 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
1811 atomic_inc(&adapter->running_cap_queries);
1812 ibmvnic_send_crq(adapter, &crq);
1813
1814 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
1815 atomic_inc(&adapter->running_cap_queries);
1816 ibmvnic_send_crq(adapter, &crq);
1817
1818 crq.query_capability.capability =
1819 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
1820 atomic_inc(&adapter->running_cap_queries);
1821 ibmvnic_send_crq(adapter, &crq);
1822
1823 crq.query_capability.capability =
1824 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
1825 atomic_inc(&adapter->running_cap_queries);
1826 ibmvnic_send_crq(adapter, &crq);
1827
1828 crq.query_capability.capability =
1829 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
1830 atomic_inc(&adapter->running_cap_queries);
1831 ibmvnic_send_crq(adapter, &crq);
1832
1833 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
1834 atomic_inc(&adapter->running_cap_queries);
1835 ibmvnic_send_crq(adapter, &crq);
1836 }
1837
1838 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
1839 {
1840 struct device *dev = &adapter->vdev->dev;
1841 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
1842 union ibmvnic_crq crq;
1843 int i;
1844
1845 dma_unmap_single(dev, adapter->ip_offload_tok,
1846 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
1847
1848 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
1849 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
1850 netdev_dbg(adapter->netdev, "%016lx\n",
1851 ((unsigned long int *)(buf))[i]);
1852
1853 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
1854 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
1855 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
1856 buf->tcp_ipv4_chksum);
1857 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
1858 buf->tcp_ipv6_chksum);
1859 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
1860 buf->udp_ipv4_chksum);
1861 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
1862 buf->udp_ipv6_chksum);
1863 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
1864 buf->large_tx_ipv4);
1865 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
1866 buf->large_tx_ipv6);
1867 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
1868 buf->large_rx_ipv4);
1869 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
1870 buf->large_rx_ipv6);
1871 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
1872 buf->max_ipv4_header_size);
1873 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
1874 buf->max_ipv6_header_size);
1875 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
1876 buf->max_tcp_header_size);
1877 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
1878 buf->max_udp_header_size);
1879 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
1880 buf->max_large_tx_size);
1881 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
1882 buf->max_large_rx_size);
1883 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
1884 buf->ipv6_extension_header);
1885 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
1886 buf->tcp_pseudosum_req);
1887 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
1888 buf->num_ipv6_ext_headers);
1889 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
1890 buf->off_ipv6_ext_headers);
1891
1892 adapter->ip_offload_ctrl_tok =
1893 dma_map_single(dev, &adapter->ip_offload_ctrl,
1894 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
1895
1896 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
1897 dev_err(dev, "Couldn't map ip offload control buffer\n");
1898 return;
1899 }
1900
1901 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
1902 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
1903 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
1904 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
1905 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
1906
1907 /* large_tx/rx disabled for now, additional features needed */
1908 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
1909 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
1910 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
1911 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
1912
1913 adapter->netdev->features = NETIF_F_GSO;
1914
1915 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
1916 adapter->netdev->features |= NETIF_F_IP_CSUM;
1917
1918 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
1919 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
1920
1921 memset(&crq, 0, sizeof(crq));
1922 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
1923 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
1924 crq.control_ip_offload.len =
1925 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
1926 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
1927 ibmvnic_send_crq(adapter, &crq);
1928 }
1929
1930 static void handle_error_info_rsp(union ibmvnic_crq *crq,
1931 struct ibmvnic_adapter *adapter)
1932 {
1933 struct device *dev = &adapter->vdev->dev;
1934 struct ibmvnic_error_buff *error_buff;
1935 unsigned long flags;
1936 bool found = false;
1937 int i;
1938
1939 if (!crq->request_error_rsp.rc.code) {
1940 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
1941 crq->request_error_rsp.rc.code);
1942 return;
1943 }
1944
1945 spin_lock_irqsave(&adapter->error_list_lock, flags);
1946 list_for_each_entry(error_buff, &adapter->errors, list)
1947 if (error_buff->error_id == crq->request_error_rsp.error_id) {
1948 found = true;
1949 list_del(&error_buff->list);
1950 break;
1951 }
1952 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
1953
1954 if (!found) {
1955 dev_err(dev, "Couldn't find error id %x\n",
1956 crq->request_error_rsp.error_id);
1957 return;
1958 }
1959
1960 dev_err(dev, "Detailed info for error id %x:",
1961 crq->request_error_rsp.error_id);
1962
1963 for (i = 0; i < error_buff->len; i++) {
1964 pr_cont("%02x", (int)error_buff->buff[i]);
1965 if (i % 8 == 7)
1966 pr_cont(" ");
1967 }
1968 pr_cont("\n");
1969
1970 dma_unmap_single(dev, error_buff->dma, error_buff->len,
1971 DMA_FROM_DEVICE);
1972 kfree(error_buff->buff);
1973 kfree(error_buff);
1974 }
1975
1976 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
1977 struct ibmvnic_adapter *adapter)
1978 {
1979 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
1980 struct ibmvnic_inflight_cmd *inflight_cmd;
1981 struct device *dev = &adapter->vdev->dev;
1982 union ibmvnic_crq newcrq;
1983 unsigned long flags;
1984
1985 /* allocate and map buffer */
1986 adapter->dump_data = kmalloc(len, GFP_KERNEL);
1987 if (!adapter->dump_data) {
1988 complete(&adapter->fw_done);
1989 return;
1990 }
1991
1992 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
1993 DMA_FROM_DEVICE);
1994
1995 if (dma_mapping_error(dev, adapter->dump_data_token)) {
1996 if (!firmware_has_feature(FW_FEATURE_CMO))
1997 dev_err(dev, "Couldn't map dump data\n");
1998 kfree(adapter->dump_data);
1999 complete(&adapter->fw_done);
2000 return;
2001 }
2002
2003 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2004 if (!inflight_cmd) {
2005 dma_unmap_single(dev, adapter->dump_data_token, len,
2006 DMA_FROM_DEVICE);
2007 kfree(adapter->dump_data);
2008 complete(&adapter->fw_done);
2009 return;
2010 }
2011
2012 memset(&newcrq, 0, sizeof(newcrq));
2013 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2014 newcrq.request_dump.cmd = REQUEST_DUMP;
2015 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2016 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2017
2018 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2019
2020 spin_lock_irqsave(&adapter->inflight_lock, flags);
2021 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2022 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2023
2024 ibmvnic_send_crq(adapter, &newcrq);
2025 }
2026
2027 static void handle_error_indication(union ibmvnic_crq *crq,
2028 struct ibmvnic_adapter *adapter)
2029 {
2030 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2031 struct ibmvnic_inflight_cmd *inflight_cmd;
2032 struct device *dev = &adapter->vdev->dev;
2033 struct ibmvnic_error_buff *error_buff;
2034 union ibmvnic_crq new_crq;
2035 unsigned long flags;
2036
2037 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2038 crq->error_indication.
2039 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2040 crq->error_indication.error_id,
2041 crq->error_indication.error_cause);
2042
2043 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2044 if (!error_buff)
2045 return;
2046
2047 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2048 if (!error_buff->buff) {
2049 kfree(error_buff);
2050 return;
2051 }
2052
2053 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2054 DMA_FROM_DEVICE);
2055 if (dma_mapping_error(dev, error_buff->dma)) {
2056 if (!firmware_has_feature(FW_FEATURE_CMO))
2057 dev_err(dev, "Couldn't map error buffer\n");
2058 kfree(error_buff->buff);
2059 kfree(error_buff);
2060 return;
2061 }
2062
2063 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2064 if (!inflight_cmd) {
2065 dma_unmap_single(dev, error_buff->dma, detail_len,
2066 DMA_FROM_DEVICE);
2067 kfree(error_buff->buff);
2068 kfree(error_buff);
2069 return;
2070 }
2071
2072 error_buff->len = detail_len;
2073 error_buff->error_id = crq->error_indication.error_id;
2074
2075 spin_lock_irqsave(&adapter->error_list_lock, flags);
2076 list_add_tail(&error_buff->list, &adapter->errors);
2077 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2078
2079 memset(&new_crq, 0, sizeof(new_crq));
2080 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2081 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2082 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2083 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2084 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2085
2086 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2087
2088 spin_lock_irqsave(&adapter->inflight_lock, flags);
2089 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2090 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2091
2092 ibmvnic_send_crq(adapter, &new_crq);
2093 }
2094
2095 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2096 struct ibmvnic_adapter *adapter)
2097 {
2098 struct net_device *netdev = adapter->netdev;
2099 struct device *dev = &adapter->vdev->dev;
2100 long rc;
2101
2102 rc = crq->change_mac_addr_rsp.rc.code;
2103 if (rc) {
2104 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2105 return;
2106 }
2107 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2108 ETH_ALEN);
2109 }
2110
2111 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2112 struct ibmvnic_adapter *adapter)
2113 {
2114 struct device *dev = &adapter->vdev->dev;
2115 u64 *req_value;
2116 char *name;
2117
2118 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2119 case REQ_TX_QUEUES:
2120 req_value = &adapter->req_tx_queues;
2121 name = "tx";
2122 break;
2123 case REQ_RX_QUEUES:
2124 req_value = &adapter->req_rx_queues;
2125 name = "rx";
2126 break;
2127 case REQ_RX_ADD_QUEUES:
2128 req_value = &adapter->req_rx_add_queues;
2129 name = "rx_add";
2130 break;
2131 case REQ_TX_ENTRIES_PER_SUBCRQ:
2132 req_value = &adapter->req_tx_entries_per_subcrq;
2133 name = "tx_entries_per_subcrq";
2134 break;
2135 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2136 req_value = &adapter->req_rx_add_entries_per_subcrq;
2137 name = "rx_add_entries_per_subcrq";
2138 break;
2139 case REQ_MTU:
2140 req_value = &adapter->req_mtu;
2141 name = "mtu";
2142 break;
2143 case PROMISC_REQUESTED:
2144 req_value = &adapter->promisc;
2145 name = "promisc";
2146 break;
2147 default:
2148 dev_err(dev, "Got invalid cap request rsp %d\n",
2149 crq->request_capability.capability);
2150 return;
2151 }
2152
2153 switch (crq->request_capability_rsp.rc.code) {
2154 case SUCCESS:
2155 break;
2156 case PARTIALSUCCESS:
2157 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2158 *req_value,
2159 (long int)be32_to_cpu(crq->request_capability_rsp.
2160 number), name);
2161 release_sub_crqs(adapter);
2162 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2163 complete(&adapter->init_done);
2164 return;
2165 default:
2166 dev_err(dev, "Error %d in request cap rsp\n",
2167 crq->request_capability_rsp.rc.code);
2168 return;
2169 }
2170
2171 /* Done receiving requested capabilities, query IP offload support */
2172 if (++adapter->requested_caps == 7) {
2173 union ibmvnic_crq newcrq;
2174 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2175 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2176 &adapter->ip_offload_buf;
2177
2178 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2179 buf_sz,
2180 DMA_FROM_DEVICE);
2181
2182 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2183 if (!firmware_has_feature(FW_FEATURE_CMO))
2184 dev_err(dev, "Couldn't map offload buffer\n");
2185 return;
2186 }
2187
2188 memset(&newcrq, 0, sizeof(newcrq));
2189 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2190 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2191 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2192 newcrq.query_ip_offload.ioba =
2193 cpu_to_be32(adapter->ip_offload_tok);
2194
2195 ibmvnic_send_crq(adapter, &newcrq);
2196 }
2197 }
2198
2199 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2200 struct ibmvnic_adapter *adapter)
2201 {
2202 struct device *dev = &adapter->vdev->dev;
2203 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2204 struct ibmvnic_login_buffer *login = adapter->login_buf;
2205 union ibmvnic_crq crq;
2206 int i;
2207
2208 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2209 DMA_BIDIRECTIONAL);
2210 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2211 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2212
2213 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2214 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2215 netdev_dbg(adapter->netdev, "%016lx\n",
2216 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2217 }
2218
2219 /* Sanity checks */
2220 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2221 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2222 adapter->req_rx_add_queues !=
2223 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2224 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2225 ibmvnic_remove(adapter->vdev);
2226 return -EIO;
2227 }
2228 complete(&adapter->init_done);
2229
2230 memset(&crq, 0, sizeof(crq));
2231 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2232 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2233 ibmvnic_send_crq(adapter, &crq);
2234
2235 return 0;
2236 }
2237
2238 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2239 struct ibmvnic_adapter *adapter)
2240 {
2241 struct device *dev = &adapter->vdev->dev;
2242 u8 map_id = crq->request_map_rsp.map_id;
2243 int tx_subcrqs;
2244 int rx_subcrqs;
2245 long rc;
2246 int i;
2247
2248 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2249 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2250
2251 rc = crq->request_map_rsp.rc.code;
2252 if (rc) {
2253 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2254 adapter->map_id--;
2255 /* need to find and zero tx/rx_pool map_id */
2256 for (i = 0; i < tx_subcrqs; i++) {
2257 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2258 adapter->tx_pool[i].long_term_buff.map_id = 0;
2259 }
2260 for (i = 0; i < rx_subcrqs; i++) {
2261 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2262 adapter->rx_pool[i].long_term_buff.map_id = 0;
2263 }
2264 }
2265 complete(&adapter->fw_done);
2266 }
2267
2268 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2269 struct ibmvnic_adapter *adapter)
2270 {
2271 struct device *dev = &adapter->vdev->dev;
2272 long rc;
2273
2274 rc = crq->request_unmap_rsp.rc.code;
2275 if (rc)
2276 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2277 }
2278
2279 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2280 struct ibmvnic_adapter *adapter)
2281 {
2282 struct net_device *netdev = adapter->netdev;
2283 struct device *dev = &adapter->vdev->dev;
2284 long rc;
2285
2286 rc = crq->query_map_rsp.rc.code;
2287 if (rc) {
2288 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2289 return;
2290 }
2291 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2292 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2293 crq->query_map_rsp.free_pages);
2294 }
2295
2296 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2297 struct ibmvnic_adapter *adapter)
2298 {
2299 struct net_device *netdev = adapter->netdev;
2300 struct device *dev = &adapter->vdev->dev;
2301 long rc;
2302
2303 atomic_dec(&adapter->running_cap_queries);
2304 netdev_dbg(netdev, "Outstanding queries: %d\n",
2305 atomic_read(&adapter->running_cap_queries));
2306 rc = crq->query_capability.rc.code;
2307 if (rc) {
2308 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2309 goto out;
2310 }
2311
2312 switch (be16_to_cpu(crq->query_capability.capability)) {
2313 case MIN_TX_QUEUES:
2314 adapter->min_tx_queues =
2315 be64_to_cpu(crq->query_capability.number);
2316 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2317 adapter->min_tx_queues);
2318 break;
2319 case MIN_RX_QUEUES:
2320 adapter->min_rx_queues =
2321 be64_to_cpu(crq->query_capability.number);
2322 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2323 adapter->min_rx_queues);
2324 break;
2325 case MIN_RX_ADD_QUEUES:
2326 adapter->min_rx_add_queues =
2327 be64_to_cpu(crq->query_capability.number);
2328 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2329 adapter->min_rx_add_queues);
2330 break;
2331 case MAX_TX_QUEUES:
2332 adapter->max_tx_queues =
2333 be64_to_cpu(crq->query_capability.number);
2334 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2335 adapter->max_tx_queues);
2336 break;
2337 case MAX_RX_QUEUES:
2338 adapter->max_rx_queues =
2339 be64_to_cpu(crq->query_capability.number);
2340 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2341 adapter->max_rx_queues);
2342 break;
2343 case MAX_RX_ADD_QUEUES:
2344 adapter->max_rx_add_queues =
2345 be64_to_cpu(crq->query_capability.number);
2346 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2347 adapter->max_rx_add_queues);
2348 break;
2349 case MIN_TX_ENTRIES_PER_SUBCRQ:
2350 adapter->min_tx_entries_per_subcrq =
2351 be64_to_cpu(crq->query_capability.number);
2352 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2353 adapter->min_tx_entries_per_subcrq);
2354 break;
2355 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2356 adapter->min_rx_add_entries_per_subcrq =
2357 be64_to_cpu(crq->query_capability.number);
2358 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2359 adapter->min_rx_add_entries_per_subcrq);
2360 break;
2361 case MAX_TX_ENTRIES_PER_SUBCRQ:
2362 adapter->max_tx_entries_per_subcrq =
2363 be64_to_cpu(crq->query_capability.number);
2364 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2365 adapter->max_tx_entries_per_subcrq);
2366 break;
2367 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2368 adapter->max_rx_add_entries_per_subcrq =
2369 be64_to_cpu(crq->query_capability.number);
2370 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2371 adapter->max_rx_add_entries_per_subcrq);
2372 break;
2373 case TCP_IP_OFFLOAD:
2374 adapter->tcp_ip_offload =
2375 be64_to_cpu(crq->query_capability.number);
2376 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2377 adapter->tcp_ip_offload);
2378 break;
2379 case PROMISC_SUPPORTED:
2380 adapter->promisc_supported =
2381 be64_to_cpu(crq->query_capability.number);
2382 netdev_dbg(netdev, "promisc_supported = %lld\n",
2383 adapter->promisc_supported);
2384 break;
2385 case MIN_MTU:
2386 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2387 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2388 break;
2389 case MAX_MTU:
2390 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2391 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2392 break;
2393 case MAX_MULTICAST_FILTERS:
2394 adapter->max_multicast_filters =
2395 be64_to_cpu(crq->query_capability.number);
2396 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2397 adapter->max_multicast_filters);
2398 break;
2399 case VLAN_HEADER_INSERTION:
2400 adapter->vlan_header_insertion =
2401 be64_to_cpu(crq->query_capability.number);
2402 if (adapter->vlan_header_insertion)
2403 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2404 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2405 adapter->vlan_header_insertion);
2406 break;
2407 case MAX_TX_SG_ENTRIES:
2408 adapter->max_tx_sg_entries =
2409 be64_to_cpu(crq->query_capability.number);
2410 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2411 adapter->max_tx_sg_entries);
2412 break;
2413 case RX_SG_SUPPORTED:
2414 adapter->rx_sg_supported =
2415 be64_to_cpu(crq->query_capability.number);
2416 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2417 adapter->rx_sg_supported);
2418 break;
2419 case OPT_TX_COMP_SUB_QUEUES:
2420 adapter->opt_tx_comp_sub_queues =
2421 be64_to_cpu(crq->query_capability.number);
2422 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2423 adapter->opt_tx_comp_sub_queues);
2424 break;
2425 case OPT_RX_COMP_QUEUES:
2426 adapter->opt_rx_comp_queues =
2427 be64_to_cpu(crq->query_capability.number);
2428 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2429 adapter->opt_rx_comp_queues);
2430 break;
2431 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2432 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2433 be64_to_cpu(crq->query_capability.number);
2434 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2435 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2436 break;
2437 case OPT_TX_ENTRIES_PER_SUBCRQ:
2438 adapter->opt_tx_entries_per_subcrq =
2439 be64_to_cpu(crq->query_capability.number);
2440 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2441 adapter->opt_tx_entries_per_subcrq);
2442 break;
2443 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2444 adapter->opt_rxba_entries_per_subcrq =
2445 be64_to_cpu(crq->query_capability.number);
2446 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2447 adapter->opt_rxba_entries_per_subcrq);
2448 break;
2449 case TX_RX_DESC_REQ:
2450 adapter->tx_rx_desc_req = crq->query_capability.number;
2451 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2452 adapter->tx_rx_desc_req);
2453 break;
2454
2455 default:
2456 netdev_err(netdev, "Got invalid cap rsp %d\n",
2457 crq->query_capability.capability);
2458 }
2459
2460 out:
2461 if (atomic_read(&adapter->running_cap_queries) == 0)
2462 complete(&adapter->init_done);
2463 /* We're done querying the capabilities, initialize sub-crqs */
2464 }
2465
2466 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2467 struct ibmvnic_adapter *adapter)
2468 {
2469 u8 correlator = crq->control_ras_rsp.correlator;
2470 struct device *dev = &adapter->vdev->dev;
2471 bool found = false;
2472 int i;
2473
2474 if (crq->control_ras_rsp.rc.code) {
2475 dev_warn(dev, "Control ras failed rc=%d\n",
2476 crq->control_ras_rsp.rc.code);
2477 return;
2478 }
2479
2480 for (i = 0; i < adapter->ras_comp_num; i++) {
2481 if (adapter->ras_comps[i].correlator == correlator) {
2482 found = true;
2483 break;
2484 }
2485 }
2486
2487 if (!found) {
2488 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2489 return;
2490 }
2491
2492 switch (crq->control_ras_rsp.op) {
2493 case IBMVNIC_TRACE_LEVEL:
2494 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2495 break;
2496 case IBMVNIC_ERROR_LEVEL:
2497 adapter->ras_comps[i].error_check_level =
2498 crq->control_ras.level;
2499 break;
2500 case IBMVNIC_TRACE_PAUSE:
2501 adapter->ras_comp_int[i].paused = 1;
2502 break;
2503 case IBMVNIC_TRACE_RESUME:
2504 adapter->ras_comp_int[i].paused = 0;
2505 break;
2506 case IBMVNIC_TRACE_ON:
2507 adapter->ras_comps[i].trace_on = 1;
2508 break;
2509 case IBMVNIC_TRACE_OFF:
2510 adapter->ras_comps[i].trace_on = 0;
2511 break;
2512 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2513 /* trace_buff_sz is 3 bytes, stuff it into an int */
2514 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2515 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2516 crq->control_ras_rsp.trace_buff_sz[0];
2517 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2518 crq->control_ras_rsp.trace_buff_sz[1];
2519 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2520 crq->control_ras_rsp.trace_buff_sz[2];
2521 break;
2522 default:
2523 dev_err(dev, "invalid op %d on control_ras_rsp",
2524 crq->control_ras_rsp.op);
2525 }
2526 }
2527
2528 static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2529 {
2530 file->private_data = inode->i_private;
2531 return 0;
2532 }
2533
2534 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2535 loff_t *ppos)
2536 {
2537 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2538 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2539 struct device *dev = &adapter->vdev->dev;
2540 struct ibmvnic_fw_trace_entry *trace;
2541 int num = ras_comp_int->num;
2542 union ibmvnic_crq crq;
2543 dma_addr_t trace_tok;
2544
2545 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2546 return 0;
2547
2548 trace =
2549 dma_alloc_coherent(dev,
2550 be32_to_cpu(adapter->ras_comps[num].
2551 trace_buff_size), &trace_tok,
2552 GFP_KERNEL);
2553 if (!trace) {
2554 dev_err(dev, "Couldn't alloc trace buffer\n");
2555 return 0;
2556 }
2557
2558 memset(&crq, 0, sizeof(crq));
2559 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2560 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2561 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2562 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2563 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2564 ibmvnic_send_crq(adapter, &crq);
2565
2566 init_completion(&adapter->fw_done);
2567 wait_for_completion(&adapter->fw_done);
2568
2569 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2570 len =
2571 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2572 *ppos;
2573
2574 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2575
2576 dma_free_coherent(dev,
2577 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2578 trace, trace_tok);
2579 *ppos += len;
2580 return len;
2581 }
2582
2583 static const struct file_operations trace_ops = {
2584 .owner = THIS_MODULE,
2585 .open = ibmvnic_fw_comp_open,
2586 .read = trace_read,
2587 };
2588
2589 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2590 loff_t *ppos)
2591 {
2592 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2593 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2594 int num = ras_comp_int->num;
2595 char buff[5]; /* 1 or 0 plus \n and \0 */
2596 int size;
2597
2598 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2599
2600 if (*ppos >= size)
2601 return 0;
2602
2603 copy_to_user(user_buf, buff, size);
2604 *ppos += size;
2605 return size;
2606 }
2607
2608 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2609 size_t len, loff_t *ppos)
2610 {
2611 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2612 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2613 int num = ras_comp_int->num;
2614 union ibmvnic_crq crq;
2615 unsigned long val;
2616 char buff[9]; /* decimal max int plus \n and \0 */
2617
2618 copy_from_user(buff, user_buf, sizeof(buff));
2619 val = kstrtoul(buff, 10, NULL);
2620
2621 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2622
2623 memset(&crq, 0, sizeof(crq));
2624 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2625 crq.control_ras.cmd = CONTROL_RAS;
2626 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2627 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2628 ibmvnic_send_crq(adapter, &crq);
2629
2630 return len;
2631 }
2632
2633 static const struct file_operations paused_ops = {
2634 .owner = THIS_MODULE,
2635 .open = ibmvnic_fw_comp_open,
2636 .read = paused_read,
2637 .write = paused_write,
2638 };
2639
2640 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2641 size_t len, loff_t *ppos)
2642 {
2643 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2644 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2645 int num = ras_comp_int->num;
2646 char buff[5]; /* 1 or 0 plus \n and \0 */
2647 int size;
2648
2649 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2650
2651 if (*ppos >= size)
2652 return 0;
2653
2654 copy_to_user(user_buf, buff, size);
2655 *ppos += size;
2656 return size;
2657 }
2658
2659 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2660 size_t len, loff_t *ppos)
2661 {
2662 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2663 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2664 int num = ras_comp_int->num;
2665 union ibmvnic_crq crq;
2666 unsigned long val;
2667 char buff[9]; /* decimal max int plus \n and \0 */
2668
2669 copy_from_user(buff, user_buf, sizeof(buff));
2670 val = kstrtoul(buff, 10, NULL);
2671
2672 memset(&crq, 0, sizeof(crq));
2673 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2674 crq.control_ras.cmd = CONTROL_RAS;
2675 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2676 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2677
2678 return len;
2679 }
2680
2681 static const struct file_operations tracing_ops = {
2682 .owner = THIS_MODULE,
2683 .open = ibmvnic_fw_comp_open,
2684 .read = tracing_read,
2685 .write = tracing_write,
2686 };
2687
2688 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2689 size_t len, loff_t *ppos)
2690 {
2691 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2692 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2693 int num = ras_comp_int->num;
2694 char buff[5]; /* decimal max char plus \n and \0 */
2695 int size;
2696
2697 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2698
2699 if (*ppos >= size)
2700 return 0;
2701
2702 copy_to_user(user_buf, buff, size);
2703 *ppos += size;
2704 return size;
2705 }
2706
2707 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2708 size_t len, loff_t *ppos)
2709 {
2710 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2711 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2712 int num = ras_comp_int->num;
2713 union ibmvnic_crq crq;
2714 unsigned long val;
2715 char buff[9]; /* decimal max int plus \n and \0 */
2716
2717 copy_from_user(buff, user_buf, sizeof(buff));
2718 val = kstrtoul(buff, 10, NULL);
2719
2720 if (val > 9)
2721 val = 9;
2722
2723 memset(&crq, 0, sizeof(crq));
2724 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2725 crq.control_ras.cmd = CONTROL_RAS;
2726 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2727 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2728 crq.control_ras.level = val;
2729 ibmvnic_send_crq(adapter, &crq);
2730
2731 return len;
2732 }
2733
2734 static const struct file_operations error_level_ops = {
2735 .owner = THIS_MODULE,
2736 .open = ibmvnic_fw_comp_open,
2737 .read = error_level_read,
2738 .write = error_level_write,
2739 };
2740
2741 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2742 size_t len, loff_t *ppos)
2743 {
2744 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2745 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2746 int num = ras_comp_int->num;
2747 char buff[5]; /* decimal max char plus \n and \0 */
2748 int size;
2749
2750 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2751 if (*ppos >= size)
2752 return 0;
2753
2754 copy_to_user(user_buf, buff, size);
2755 *ppos += size;
2756 return size;
2757 }
2758
2759 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2760 size_t len, loff_t *ppos)
2761 {
2762 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2763 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2764 union ibmvnic_crq crq;
2765 unsigned long val;
2766 char buff[9]; /* decimal max int plus \n and \0 */
2767
2768 copy_from_user(buff, user_buf, sizeof(buff));
2769 val = kstrtoul(buff, 10, NULL);
2770 if (val > 9)
2771 val = 9;
2772
2773 memset(&crq, 0, sizeof(crq));
2774 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2775 crq.control_ras.cmd = CONTROL_RAS;
2776 crq.control_ras.correlator =
2777 adapter->ras_comps[ras_comp_int->num].correlator;
2778 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
2779 crq.control_ras.level = val;
2780 ibmvnic_send_crq(adapter, &crq);
2781
2782 return len;
2783 }
2784
2785 static const struct file_operations trace_level_ops = {
2786 .owner = THIS_MODULE,
2787 .open = ibmvnic_fw_comp_open,
2788 .read = trace_level_read,
2789 .write = trace_level_write,
2790 };
2791
2792 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
2793 size_t len, loff_t *ppos)
2794 {
2795 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2796 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2797 int num = ras_comp_int->num;
2798 char buff[9]; /* decimal max int plus \n and \0 */
2799 int size;
2800
2801 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
2802 if (*ppos >= size)
2803 return 0;
2804
2805 copy_to_user(user_buf, buff, size);
2806 *ppos += size;
2807 return size;
2808 }
2809
2810 static ssize_t trace_buff_size_write(struct file *file,
2811 const char __user *user_buf, size_t len,
2812 loff_t *ppos)
2813 {
2814 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2815 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2816 union ibmvnic_crq crq;
2817 unsigned long val;
2818 char buff[9]; /* decimal max int plus \n and \0 */
2819
2820 copy_from_user(buff, user_buf, sizeof(buff));
2821 val = kstrtoul(buff, 10, NULL);
2822
2823 memset(&crq, 0, sizeof(crq));
2824 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2825 crq.control_ras.cmd = CONTROL_RAS;
2826 crq.control_ras.correlator =
2827 adapter->ras_comps[ras_comp_int->num].correlator;
2828 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
2829 /* trace_buff_sz is 3 bytes, stuff an int into it */
2830 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
2831 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
2832 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
2833 ibmvnic_send_crq(adapter, &crq);
2834
2835 return len;
2836 }
2837
2838 static const struct file_operations trace_size_ops = {
2839 .owner = THIS_MODULE,
2840 .open = ibmvnic_fw_comp_open,
2841 .read = trace_buff_size_read,
2842 .write = trace_buff_size_write,
2843 };
2844
2845 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
2846 struct ibmvnic_adapter *adapter)
2847 {
2848 struct device *dev = &adapter->vdev->dev;
2849 struct dentry *dir_ent;
2850 struct dentry *ent;
2851 int i;
2852
2853 debugfs_remove_recursive(adapter->ras_comps_ent);
2854
2855 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
2856 adapter->debugfs_dir);
2857 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
2858 dev_info(dev, "debugfs create ras_comps dir failed\n");
2859 return;
2860 }
2861
2862 for (i = 0; i < adapter->ras_comp_num; i++) {
2863 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
2864 adapter->ras_comps_ent);
2865 if (!dir_ent || IS_ERR(dir_ent)) {
2866 dev_info(dev, "debugfs create %s dir failed\n",
2867 adapter->ras_comps[i].name);
2868 continue;
2869 }
2870
2871 adapter->ras_comp_int[i].adapter = adapter;
2872 adapter->ras_comp_int[i].num = i;
2873 adapter->ras_comp_int[i].desc_blob.data =
2874 &adapter->ras_comps[i].description;
2875 adapter->ras_comp_int[i].desc_blob.size =
2876 sizeof(adapter->ras_comps[i].description);
2877
2878 /* Don't need to remember the dentry's because the debugfs dir
2879 * gets removed recursively
2880 */
2881 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
2882 &adapter->ras_comp_int[i].desc_blob);
2883 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
2884 dir_ent, &adapter->ras_comp_int[i],
2885 &trace_size_ops);
2886 ent = debugfs_create_file("trace_level",
2887 S_IRUGO |
2888 (adapter->ras_comps[i].trace_level !=
2889 0xFF ? S_IWUSR : 0),
2890 dir_ent, &adapter->ras_comp_int[i],
2891 &trace_level_ops);
2892 ent = debugfs_create_file("error_level",
2893 S_IRUGO |
2894 (adapter->
2895 ras_comps[i].error_check_level !=
2896 0xFF ? S_IWUSR : 0),
2897 dir_ent, &adapter->ras_comp_int[i],
2898 &trace_level_ops);
2899 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
2900 dir_ent, &adapter->ras_comp_int[i],
2901 &tracing_ops);
2902 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
2903 dir_ent, &adapter->ras_comp_int[i],
2904 &paused_ops);
2905 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
2906 &adapter->ras_comp_int[i],
2907 &trace_ops);
2908 }
2909 }
2910
2911 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
2912 struct ibmvnic_adapter *adapter)
2913 {
2914 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
2915 struct device *dev = &adapter->vdev->dev;
2916 union ibmvnic_crq newcrq;
2917
2918 adapter->ras_comps = dma_alloc_coherent(dev, len,
2919 &adapter->ras_comps_tok,
2920 GFP_KERNEL);
2921 if (!adapter->ras_comps) {
2922 if (!firmware_has_feature(FW_FEATURE_CMO))
2923 dev_err(dev, "Couldn't alloc fw comps buffer\n");
2924 return;
2925 }
2926
2927 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
2928 sizeof(struct ibmvnic_fw_comp_internal),
2929 GFP_KERNEL);
2930 if (!adapter->ras_comp_int)
2931 dma_free_coherent(dev, len, adapter->ras_comps,
2932 adapter->ras_comps_tok);
2933
2934 memset(&newcrq, 0, sizeof(newcrq));
2935 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
2936 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
2937 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
2938 newcrq.request_ras_comps.len = cpu_to_be32(len);
2939 ibmvnic_send_crq(adapter, &newcrq);
2940 }
2941
2942 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
2943 {
2944 struct ibmvnic_inflight_cmd *inflight_cmd;
2945 struct device *dev = &adapter->vdev->dev;
2946 struct ibmvnic_error_buff *error_buff;
2947 unsigned long flags;
2948 unsigned long flags2;
2949
2950 spin_lock_irqsave(&adapter->inflight_lock, flags);
2951 list_for_each_entry(inflight_cmd, &adapter->inflight, list) {
2952 switch (inflight_cmd->crq.generic.cmd) {
2953 case LOGIN:
2954 dma_unmap_single(dev, adapter->login_buf_token,
2955 adapter->login_buf_sz,
2956 DMA_BIDIRECTIONAL);
2957 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2958 adapter->login_rsp_buf_sz,
2959 DMA_BIDIRECTIONAL);
2960 kfree(adapter->login_rsp_buf);
2961 kfree(adapter->login_buf);
2962 break;
2963 case REQUEST_DUMP:
2964 complete(&adapter->fw_done);
2965 break;
2966 case REQUEST_ERROR_INFO:
2967 spin_lock_irqsave(&adapter->error_list_lock, flags2);
2968 list_for_each_entry(error_buff, &adapter->errors,
2969 list) {
2970 dma_unmap_single(dev, error_buff->dma,
2971 error_buff->len,
2972 DMA_FROM_DEVICE);
2973 kfree(error_buff->buff);
2974 list_del(&error_buff->list);
2975 kfree(error_buff);
2976 }
2977 spin_unlock_irqrestore(&adapter->error_list_lock,
2978 flags2);
2979 break;
2980 }
2981 list_del(&inflight_cmd->list);
2982 kfree(inflight_cmd);
2983 }
2984 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2985 }
2986
2987 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2988 struct ibmvnic_adapter *adapter)
2989 {
2990 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2991 struct net_device *netdev = adapter->netdev;
2992 struct device *dev = &adapter->vdev->dev;
2993 long rc;
2994
2995 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
2996 ((unsigned long int *)crq)[0],
2997 ((unsigned long int *)crq)[1]);
2998 switch (gen_crq->first) {
2999 case IBMVNIC_CRQ_INIT_RSP:
3000 switch (gen_crq->cmd) {
3001 case IBMVNIC_CRQ_INIT:
3002 dev_info(dev, "Partner initialized\n");
3003 /* Send back a response */
3004 rc = ibmvnic_send_crq_init_complete(adapter);
3005 if (rc == 0)
3006 send_version_xchg(adapter);
3007 else
3008 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3009 break;
3010 case IBMVNIC_CRQ_INIT_COMPLETE:
3011 dev_info(dev, "Partner initialization complete\n");
3012 send_version_xchg(adapter);
3013 break;
3014 default:
3015 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3016 }
3017 return;
3018 case IBMVNIC_CRQ_XPORT_EVENT:
3019 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3020 dev_info(dev, "Re-enabling adapter\n");
3021 adapter->migrated = true;
3022 ibmvnic_free_inflight(adapter);
3023 release_sub_crqs(adapter);
3024 rc = ibmvnic_reenable_crq_queue(adapter);
3025 if (rc)
3026 dev_err(dev, "Error after enable rc=%ld\n", rc);
3027 adapter->migrated = false;
3028 rc = ibmvnic_send_crq_init(adapter);
3029 if (rc)
3030 dev_err(dev, "Error sending init rc=%ld\n", rc);
3031 } else {
3032 /* The adapter lost the connection */
3033 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3034 gen_crq->cmd);
3035 ibmvnic_free_inflight(adapter);
3036 release_sub_crqs(adapter);
3037 }
3038 return;
3039 case IBMVNIC_CRQ_CMD_RSP:
3040 break;
3041 default:
3042 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3043 gen_crq->first);
3044 return;
3045 }
3046
3047 switch (gen_crq->cmd) {
3048 case VERSION_EXCHANGE_RSP:
3049 rc = crq->version_exchange_rsp.rc.code;
3050 if (rc) {
3051 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3052 break;
3053 }
3054 dev_info(dev, "Partner protocol version is %d\n",
3055 crq->version_exchange_rsp.version);
3056 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3057 ibmvnic_version)
3058 ibmvnic_version =
3059 be16_to_cpu(crq->version_exchange_rsp.version);
3060 send_cap_queries(adapter);
3061 break;
3062 case QUERY_CAPABILITY_RSP:
3063 handle_query_cap_rsp(crq, adapter);
3064 break;
3065 case QUERY_MAP_RSP:
3066 handle_query_map_rsp(crq, adapter);
3067 break;
3068 case REQUEST_MAP_RSP:
3069 handle_request_map_rsp(crq, adapter);
3070 break;
3071 case REQUEST_UNMAP_RSP:
3072 handle_request_unmap_rsp(crq, adapter);
3073 break;
3074 case REQUEST_CAPABILITY_RSP:
3075 handle_request_cap_rsp(crq, adapter);
3076 break;
3077 case LOGIN_RSP:
3078 netdev_dbg(netdev, "Got Login Response\n");
3079 handle_login_rsp(crq, adapter);
3080 break;
3081 case LOGICAL_LINK_STATE_RSP:
3082 netdev_dbg(netdev, "Got Logical Link State Response\n");
3083 adapter->logical_link_state =
3084 crq->logical_link_state_rsp.link_state;
3085 break;
3086 case LINK_STATE_INDICATION:
3087 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3088 adapter->phys_link_state =
3089 crq->link_state_indication.phys_link_state;
3090 adapter->logical_link_state =
3091 crq->link_state_indication.logical_link_state;
3092 break;
3093 case CHANGE_MAC_ADDR_RSP:
3094 netdev_dbg(netdev, "Got MAC address change Response\n");
3095 handle_change_mac_rsp(crq, adapter);
3096 break;
3097 case ERROR_INDICATION:
3098 netdev_dbg(netdev, "Got Error Indication\n");
3099 handle_error_indication(crq, adapter);
3100 break;
3101 case REQUEST_ERROR_RSP:
3102 netdev_dbg(netdev, "Got Error Detail Response\n");
3103 handle_error_info_rsp(crq, adapter);
3104 break;
3105 case REQUEST_STATISTICS_RSP:
3106 netdev_dbg(netdev, "Got Statistics Response\n");
3107 complete(&adapter->stats_done);
3108 break;
3109 case REQUEST_DUMP_SIZE_RSP:
3110 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3111 handle_dump_size_rsp(crq, adapter);
3112 break;
3113 case REQUEST_DUMP_RSP:
3114 netdev_dbg(netdev, "Got Request Dump Response\n");
3115 complete(&adapter->fw_done);
3116 break;
3117 case QUERY_IP_OFFLOAD_RSP:
3118 netdev_dbg(netdev, "Got Query IP offload Response\n");
3119 handle_query_ip_offload_rsp(adapter);
3120 break;
3121 case MULTICAST_CTRL_RSP:
3122 netdev_dbg(netdev, "Got multicast control Response\n");
3123 break;
3124 case CONTROL_IP_OFFLOAD_RSP:
3125 netdev_dbg(netdev, "Got Control IP offload Response\n");
3126 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3127 sizeof(adapter->ip_offload_ctrl),
3128 DMA_TO_DEVICE);
3129 /* We're done with the queries, perform the login */
3130 send_login(adapter);
3131 break;
3132 case REQUEST_RAS_COMP_NUM_RSP:
3133 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3134 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3135 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3136 break;
3137 }
3138 adapter->ras_comp_num =
3139 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3140 handle_request_ras_comp_num_rsp(crq, adapter);
3141 break;
3142 case REQUEST_RAS_COMPS_RSP:
3143 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3144 handle_request_ras_comps_rsp(crq, adapter);
3145 break;
3146 case CONTROL_RAS_RSP:
3147 netdev_dbg(netdev, "Got Control RAS Response\n");
3148 handle_control_ras_rsp(crq, adapter);
3149 break;
3150 case COLLECT_FW_TRACE_RSP:
3151 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3152 complete(&adapter->fw_done);
3153 break;
3154 default:
3155 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3156 gen_crq->cmd);
3157 }
3158 }
3159
3160 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3161 {
3162 struct ibmvnic_adapter *adapter = instance;
3163 struct ibmvnic_crq_queue *queue = &adapter->crq;
3164 struct vio_dev *vdev = adapter->vdev;
3165 union ibmvnic_crq *crq;
3166 unsigned long flags;
3167 bool done = false;
3168
3169 spin_lock_irqsave(&queue->lock, flags);
3170 vio_disable_interrupts(vdev);
3171 while (!done) {
3172 /* Pull all the valid messages off the CRQ */
3173 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3174 ibmvnic_handle_crq(crq, adapter);
3175 crq->generic.first = 0;
3176 }
3177 vio_enable_interrupts(vdev);
3178 crq = ibmvnic_next_crq(adapter);
3179 if (crq) {
3180 vio_disable_interrupts(vdev);
3181 ibmvnic_handle_crq(crq, adapter);
3182 crq->generic.first = 0;
3183 } else {
3184 done = true;
3185 }
3186 }
3187 spin_unlock_irqrestore(&queue->lock, flags);
3188 return IRQ_HANDLED;
3189 }
3190
3191 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3192 {
3193 struct vio_dev *vdev = adapter->vdev;
3194 int rc;
3195
3196 do {
3197 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3198 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3199
3200 if (rc)
3201 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3202
3203 return rc;
3204 }
3205
3206 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3207 {
3208 struct ibmvnic_crq_queue *crq = &adapter->crq;
3209 struct device *dev = &adapter->vdev->dev;
3210 struct vio_dev *vdev = adapter->vdev;
3211 int rc;
3212
3213 /* Close the CRQ */
3214 do {
3215 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3216 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3217
3218 /* Clean out the queue */
3219 memset(crq->msgs, 0, PAGE_SIZE);
3220 crq->cur = 0;
3221
3222 /* And re-open it again */
3223 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3224 crq->msg_token, PAGE_SIZE);
3225
3226 if (rc == H_CLOSED)
3227 /* Adapter is good, but other end is not ready */
3228 dev_warn(dev, "Partner adapter not ready\n");
3229 else if (rc != 0)
3230 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3231
3232 return rc;
3233 }
3234
3235 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3236 {
3237 struct ibmvnic_crq_queue *crq = &adapter->crq;
3238 struct vio_dev *vdev = adapter->vdev;
3239 long rc;
3240
3241 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3242 free_irq(vdev->irq, adapter);
3243 do {
3244 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3245 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3246
3247 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3248 DMA_BIDIRECTIONAL);
3249 free_page((unsigned long)crq->msgs);
3250 }
3251
3252 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3253 {
3254 struct ibmvnic_crq_queue *crq = &adapter->crq;
3255 struct device *dev = &adapter->vdev->dev;
3256 struct vio_dev *vdev = adapter->vdev;
3257 int rc, retrc = -ENOMEM;
3258
3259 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3260 /* Should we allocate more than one page? */
3261
3262 if (!crq->msgs)
3263 return -ENOMEM;
3264
3265 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3266 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3267 DMA_BIDIRECTIONAL);
3268 if (dma_mapping_error(dev, crq->msg_token))
3269 goto map_failed;
3270
3271 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3272 crq->msg_token, PAGE_SIZE);
3273
3274 if (rc == H_RESOURCE)
3275 /* maybe kexecing and resource is busy. try a reset */
3276 rc = ibmvnic_reset_crq(adapter);
3277 retrc = rc;
3278
3279 if (rc == H_CLOSED) {
3280 dev_warn(dev, "Partner adapter not ready\n");
3281 } else if (rc) {
3282 dev_warn(dev, "Error %d opening adapter\n", rc);
3283 goto reg_crq_failed;
3284 }
3285
3286 retrc = 0;
3287
3288 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3289 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3290 adapter);
3291 if (rc) {
3292 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3293 vdev->irq, rc);
3294 goto req_irq_failed;
3295 }
3296
3297 rc = vio_enable_interrupts(vdev);
3298 if (rc) {
3299 dev_err(dev, "Error %d enabling interrupts\n", rc);
3300 goto req_irq_failed;
3301 }
3302
3303 crq->cur = 0;
3304 spin_lock_init(&crq->lock);
3305
3306 return retrc;
3307
3308 req_irq_failed:
3309 do {
3310 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3311 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3312 reg_crq_failed:
3313 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3314 map_failed:
3315 free_page((unsigned long)crq->msgs);
3316 return retrc;
3317 }
3318
3319 /* debugfs for dump */
3320 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3321 {
3322 struct net_device *netdev = seq->private;
3323 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3324 struct device *dev = &adapter->vdev->dev;
3325 union ibmvnic_crq crq;
3326
3327 memset(&crq, 0, sizeof(crq));
3328 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3329 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3330 ibmvnic_send_crq(adapter, &crq);
3331
3332 init_completion(&adapter->fw_done);
3333 wait_for_completion(&adapter->fw_done);
3334
3335 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3336
3337 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3338 DMA_BIDIRECTIONAL);
3339
3340 kfree(adapter->dump_data);
3341
3342 return 0;
3343 }
3344
3345 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3346 {
3347 return single_open(file, ibmvnic_dump_show, inode->i_private);
3348 }
3349
3350 static const struct file_operations ibmvnic_dump_ops = {
3351 .owner = THIS_MODULE,
3352 .open = ibmvnic_dump_open,
3353 .read = seq_read,
3354 .llseek = seq_lseek,
3355 .release = single_release,
3356 };
3357
3358 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3359 {
3360 struct ibmvnic_adapter *adapter;
3361 struct net_device *netdev;
3362 unsigned char *mac_addr_p;
3363 struct dentry *ent;
3364 char buf[16]; /* debugfs name buf */
3365 int rc;
3366
3367 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3368 dev->unit_address);
3369
3370 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3371 VETH_MAC_ADDR, NULL);
3372 if (!mac_addr_p) {
3373 dev_err(&dev->dev,
3374 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3375 __FILE__, __LINE__);
3376 return 0;
3377 }
3378
3379 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3380 IBMVNIC_MAX_TX_QUEUES);
3381 if (!netdev)
3382 return -ENOMEM;
3383
3384 adapter = netdev_priv(netdev);
3385 dev_set_drvdata(&dev->dev, netdev);
3386 adapter->vdev = dev;
3387 adapter->netdev = netdev;
3388
3389 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3390 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3391 netdev->irq = dev->irq;
3392 netdev->netdev_ops = &ibmvnic_netdev_ops;
3393 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3394 SET_NETDEV_DEV(netdev, &dev->dev);
3395
3396 spin_lock_init(&adapter->stats_lock);
3397
3398 rc = ibmvnic_init_crq_queue(adapter);
3399 if (rc) {
3400 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3401 goto free_netdev;
3402 }
3403
3404 INIT_LIST_HEAD(&adapter->errors);
3405 INIT_LIST_HEAD(&adapter->inflight);
3406 spin_lock_init(&adapter->error_list_lock);
3407 spin_lock_init(&adapter->inflight_lock);
3408
3409 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3410 sizeof(struct ibmvnic_statistics),
3411 DMA_FROM_DEVICE);
3412 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3413 if (!firmware_has_feature(FW_FEATURE_CMO))
3414 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3415 goto free_crq;
3416 }
3417
3418 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3419 ent = debugfs_create_dir(buf, NULL);
3420 if (!ent || IS_ERR(ent)) {
3421 dev_info(&dev->dev, "debugfs create directory failed\n");
3422 adapter->debugfs_dir = NULL;
3423 } else {
3424 adapter->debugfs_dir = ent;
3425 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3426 netdev, &ibmvnic_dump_ops);
3427 if (!ent || IS_ERR(ent)) {
3428 dev_info(&dev->dev,
3429 "debugfs create dump file failed\n");
3430 adapter->debugfs_dump = NULL;
3431 } else {
3432 adapter->debugfs_dump = ent;
3433 }
3434 }
3435 ibmvnic_send_crq_init(adapter);
3436
3437 init_completion(&adapter->init_done);
3438 wait_for_completion(&adapter->init_done);
3439
3440 /* needed to pull init_sub_crqs outside of an interrupt context
3441 * because it creates IRQ mappings for the subCRQ queues, causing
3442 * a kernel warning
3443 */
3444 init_sub_crqs(adapter, 0);
3445
3446 reinit_completion(&adapter->init_done);
3447 wait_for_completion(&adapter->init_done);
3448
3449 /* if init_sub_crqs is partially successful, retry */
3450 while (!adapter->tx_scrq || !adapter->rx_scrq) {
3451 init_sub_crqs(adapter, 1);
3452
3453 reinit_completion(&adapter->init_done);
3454 wait_for_completion(&adapter->init_done);
3455 }
3456
3457 netdev->real_num_tx_queues = adapter->req_tx_queues;
3458
3459 rc = register_netdev(netdev);
3460 if (rc) {
3461 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3462 goto free_debugfs;
3463 }
3464 dev_info(&dev->dev, "ibmvnic registered\n");
3465
3466 return 0;
3467
3468 free_debugfs:
3469 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3470 debugfs_remove_recursive(adapter->debugfs_dir);
3471 free_crq:
3472 ibmvnic_release_crq_queue(adapter);
3473 free_netdev:
3474 free_netdev(netdev);
3475 return rc;
3476 }
3477
3478 static int ibmvnic_remove(struct vio_dev *dev)
3479 {
3480 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3481 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3482
3483 unregister_netdev(netdev);
3484
3485 release_sub_crqs(adapter);
3486
3487 ibmvnic_release_crq_queue(adapter);
3488
3489 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3490 debugfs_remove_recursive(adapter->debugfs_dir);
3491
3492 if (adapter->ras_comps)
3493 dma_free_coherent(&dev->dev,
3494 adapter->ras_comp_num *
3495 sizeof(struct ibmvnic_fw_component),
3496 adapter->ras_comps, adapter->ras_comps_tok);
3497
3498 kfree(adapter->ras_comp_int);
3499
3500 free_netdev(netdev);
3501 dev_set_drvdata(&dev->dev, NULL);
3502
3503 return 0;
3504 }
3505
3506 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3507 {
3508 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3509 struct ibmvnic_adapter *adapter;
3510 struct iommu_table *tbl;
3511 unsigned long ret = 0;
3512 int i;
3513
3514 tbl = get_iommu_table_base(&vdev->dev);
3515
3516 /* netdev inits at probe time along with the structures we need below*/
3517 if (!netdev)
3518 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3519
3520 adapter = netdev_priv(netdev);
3521
3522 ret += PAGE_SIZE; /* the crq message queue */
3523 ret += adapter->bounce_buffer_size;
3524 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3525
3526 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3527 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3528
3529 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3530 i++)
3531 ret += adapter->rx_pool[i].size *
3532 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3533
3534 return ret;
3535 }
3536
3537 static int ibmvnic_resume(struct device *dev)
3538 {
3539 struct net_device *netdev = dev_get_drvdata(dev);
3540 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3541 int i;
3542
3543 /* kick the interrupt handlers just in case we lost an interrupt */
3544 for (i = 0; i < adapter->req_rx_queues; i++)
3545 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3546 adapter->rx_scrq[i]);
3547
3548 return 0;
3549 }
3550
3551 static struct vio_device_id ibmvnic_device_table[] = {
3552 {"network", "IBM,vnic"},
3553 {"", "" }
3554 };
3555 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3556
3557 static const struct dev_pm_ops ibmvnic_pm_ops = {
3558 .resume = ibmvnic_resume
3559 };
3560
3561 static struct vio_driver ibmvnic_driver = {
3562 .id_table = ibmvnic_device_table,
3563 .probe = ibmvnic_probe,
3564 .remove = ibmvnic_remove,
3565 .get_desired_dma = ibmvnic_get_desired_dma,
3566 .name = ibmvnic_driver_name,
3567 .pm = &ibmvnic_pm_ops,
3568 };
3569
3570 /* module functions */
3571 static int __init ibmvnic_module_init(void)
3572 {
3573 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3574 IBMVNIC_DRIVER_VERSION);
3575
3576 return vio_register_driver(&ibmvnic_driver);
3577 }
3578
3579 static void __exit ibmvnic_module_exit(void)
3580 {
3581 vio_unregister_driver(&ibmvnic_driver);
3582 }
3583
3584 module_init(ibmvnic_module_init);
3585 module_exit(ibmvnic_module_exit);
CRIS linux kernel tree