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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
blob88f3c85fb04ada575e367042d79f4b8188e12245
1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/debugfs.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
73 #include <asm/vio.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/seq_file.h>
78 #include <linux/workqueue.h>
79
80 #include "ibmvnic.h"
81
82 static const char ibmvnic_driver_name[] = "ibmvnic";
83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84
85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89
90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
91 static int ibmvnic_remove(struct vio_dev *);
92 static void release_sub_crqs(struct ibmvnic_adapter *);
93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
114
115 struct ibmvnic_stat {
116 char name[ETH_GSTRING_LEN];
117 int offset;
118 };
119
120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
121 offsetof(struct ibmvnic_statistics, stat))
122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
123
124 static const struct ibmvnic_stat ibmvnic_stats[] = {
125 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
126 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
127 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
128 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
129 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
130 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
131 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
132 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
133 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
134 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
135 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
136 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
137 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
138 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
139 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
140 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
141 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
142 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
143 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
144 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
145 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
146 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
147 };
148
149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
150 unsigned long length, unsigned long *number,
151 unsigned long *irq)
152 {
153 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
154 long rc;
155
156 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
157 *number = retbuf[0];
158 *irq = retbuf[1];
159
160 return rc;
161 }
162
163 /* net_device_ops functions */
164
165 static void init_rx_pool(struct ibmvnic_adapter *adapter,
166 struct ibmvnic_rx_pool *rx_pool, int num, int index,
167 int buff_size, int active)
168 {
169 netdev_dbg(adapter->netdev,
170 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
171 index, num, buff_size);
172 rx_pool->size = num;
173 rx_pool->index = index;
174 rx_pool->buff_size = buff_size;
175 rx_pool->active = active;
176 }
177
178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
179 struct ibmvnic_long_term_buff *ltb, int size)
180 {
181 struct device *dev = &adapter->vdev->dev;
182
183 ltb->size = size;
184 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
185 GFP_KERNEL);
186
187 if (!ltb->buff) {
188 dev_err(dev, "Couldn't alloc long term buffer\n");
189 return -ENOMEM;
190 }
191 ltb->map_id = adapter->map_id;
192 adapter->map_id++;
193 send_request_map(adapter, ltb->addr,
194 ltb->size, ltb->map_id);
195 init_completion(&adapter->fw_done);
196 wait_for_completion(&adapter->fw_done);
197 return 0;
198 }
199
200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
201 struct ibmvnic_long_term_buff *ltb)
202 {
203 struct device *dev = &adapter->vdev->dev;
204
205 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
206 send_request_unmap(adapter, ltb->map_id);
207 }
208
209 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
210 struct ibmvnic_rx_pool *pool)
211 {
212 struct device *dev = &adapter->vdev->dev;
213 int i;
214
215 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
216 if (!pool->free_map)
217 return -ENOMEM;
218
219 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
220 GFP_KERNEL);
221
222 if (!pool->rx_buff) {
223 dev_err(dev, "Couldn't alloc rx buffers\n");
224 kfree(pool->free_map);
225 return -ENOMEM;
226 }
227
228 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
229 pool->size * pool->buff_size)) {
230 kfree(pool->free_map);
231 kfree(pool->rx_buff);
232 return -ENOMEM;
233 }
234
235 for (i = 0; i < pool->size; ++i)
236 pool->free_map[i] = i;
237
238 atomic_set(&pool->available, 0);
239 pool->next_alloc = 0;
240 pool->next_free = 0;
241
242 return 0;
243 }
244
245 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
246 struct ibmvnic_rx_pool *pool)
247 {
248 int count = pool->size - atomic_read(&pool->available);
249 struct device *dev = &adapter->vdev->dev;
250 int buffers_added = 0;
251 unsigned long lpar_rc;
252 union sub_crq sub_crq;
253 struct sk_buff *skb;
254 unsigned int offset;
255 dma_addr_t dma_addr;
256 unsigned char *dst;
257 u64 *handle_array;
258 int shift = 0;
259 int index;
260 int i;
261
262 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
263 be32_to_cpu(adapter->login_rsp_buf->
264 off_rxadd_subcrqs));
265
266 for (i = 0; i < count; ++i) {
267 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
268 if (!skb) {
269 dev_err(dev, "Couldn't replenish rx buff\n");
270 adapter->replenish_no_mem++;
271 break;
272 }
273
274 index = pool->free_map[pool->next_free];
275
276 if (pool->rx_buff[index].skb)
277 dev_err(dev, "Inconsistent free_map!\n");
278
279 /* Copy the skb to the long term mapped DMA buffer */
280 offset = index * pool->buff_size;
281 dst = pool->long_term_buff.buff + offset;
282 memset(dst, 0, pool->buff_size);
283 dma_addr = pool->long_term_buff.addr + offset;
284 pool->rx_buff[index].data = dst;
285
286 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
287 pool->rx_buff[index].dma = dma_addr;
288 pool->rx_buff[index].skb = skb;
289 pool->rx_buff[index].pool_index = pool->index;
290 pool->rx_buff[index].size = pool->buff_size;
291
292 memset(&sub_crq, 0, sizeof(sub_crq));
293 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
294 sub_crq.rx_add.correlator =
295 cpu_to_be64((u64)&pool->rx_buff[index]);
296 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
297 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
298
299 /* The length field of the sCRQ is defined to be 24 bits so the
300 * buffer size needs to be left shifted by a byte before it is
301 * converted to big endian to prevent the last byte from being
302 * truncated.
303 */
304 #ifdef __LITTLE_ENDIAN__
305 shift = 8;
306 #endif
307 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
308
309 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
310 &sub_crq);
311 if (lpar_rc != H_SUCCESS)
312 goto failure;
313
314 buffers_added++;
315 adapter->replenish_add_buff_success++;
316 pool->next_free = (pool->next_free + 1) % pool->size;
317 }
318 atomic_add(buffers_added, &pool->available);
319 return;
320
321 failure:
322 dev_info(dev, "replenish pools failure\n");
323 pool->free_map[pool->next_free] = index;
324 pool->rx_buff[index].skb = NULL;
325 if (!dma_mapping_error(dev, dma_addr))
326 dma_unmap_single(dev, dma_addr, pool->buff_size,
327 DMA_FROM_DEVICE);
328
329 dev_kfree_skb_any(skb);
330 adapter->replenish_add_buff_failure++;
331 atomic_add(buffers_added, &pool->available);
332 }
333
334 static void replenish_pools(struct ibmvnic_adapter *adapter)
335 {
336 int i;
337
338 if (adapter->migrated)
339 return;
340
341 adapter->replenish_task_cycles++;
342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
343 i++) {
344 if (adapter->rx_pool[i].active)
345 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
346 }
347 }
348
349 static void free_rx_pool(struct ibmvnic_adapter *adapter,
350 struct ibmvnic_rx_pool *pool)
351 {
352 int i;
353
354 kfree(pool->free_map);
355 pool->free_map = NULL;
356
357 if (!pool->rx_buff)
358 return;
359
360 for (i = 0; i < pool->size; i++) {
361 if (pool->rx_buff[i].skb) {
362 dev_kfree_skb_any(pool->rx_buff[i].skb);
363 pool->rx_buff[i].skb = NULL;
364 }
365 }
366 kfree(pool->rx_buff);
367 pool->rx_buff = NULL;
368 }
369
370 static int ibmvnic_open(struct net_device *netdev)
371 {
372 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
373 struct device *dev = &adapter->vdev->dev;
374 struct ibmvnic_tx_pool *tx_pool;
375 union ibmvnic_crq crq;
376 int rxadd_subcrqs;
377 u64 *size_array;
378 int tx_subcrqs;
379 int i, j;
380
381 rxadd_subcrqs =
382 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
383 tx_subcrqs =
384 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
385 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
386 be32_to_cpu(adapter->login_rsp_buf->
387 off_rxadd_buff_size));
388 adapter->map_id = 1;
389 adapter->napi = kcalloc(adapter->req_rx_queues,
390 sizeof(struct napi_struct), GFP_KERNEL);
391 if (!adapter->napi)
392 goto alloc_napi_failed;
393 for (i = 0; i < adapter->req_rx_queues; i++) {
394 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
395 NAPI_POLL_WEIGHT);
396 napi_enable(&adapter->napi[i]);
397 }
398 adapter->rx_pool =
399 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
400
401 if (!adapter->rx_pool)
402 goto rx_pool_arr_alloc_failed;
403 send_map_query(adapter);
404 for (i = 0; i < rxadd_subcrqs; i++) {
405 init_rx_pool(adapter, &adapter->rx_pool[i],
406 IBMVNIC_BUFFS_PER_POOL, i,
407 be64_to_cpu(size_array[i]), 1);
408 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
409 dev_err(dev, "Couldn't alloc rx pool\n");
410 goto rx_pool_alloc_failed;
411 }
412 }
413 adapter->tx_pool =
414 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
415
416 if (!adapter->tx_pool)
417 goto tx_pool_arr_alloc_failed;
418 for (i = 0; i < tx_subcrqs; i++) {
419 tx_pool = &adapter->tx_pool[i];
420 tx_pool->tx_buff =
421 kcalloc(adapter->max_tx_entries_per_subcrq,
422 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
423 if (!tx_pool->tx_buff)
424 goto tx_pool_alloc_failed;
425
426 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
427 adapter->max_tx_entries_per_subcrq *
428 adapter->req_mtu))
429 goto tx_ltb_alloc_failed;
430
431 tx_pool->free_map =
432 kcalloc(adapter->max_tx_entries_per_subcrq,
433 sizeof(int), GFP_KERNEL);
434 if (!tx_pool->free_map)
435 goto tx_fm_alloc_failed;
436
437 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
438 tx_pool->free_map[j] = j;
439
440 tx_pool->consumer_index = 0;
441 tx_pool->producer_index = 0;
442 }
443 adapter->bounce_buffer_size =
444 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
445 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
446 GFP_KERNEL);
447 if (!adapter->bounce_buffer)
448 goto bounce_alloc_failed;
449
450 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
451 adapter->bounce_buffer_size,
452 DMA_TO_DEVICE);
453 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
454 dev_err(dev, "Couldn't map tx bounce buffer\n");
455 goto bounce_map_failed;
456 }
457 replenish_pools(adapter);
458
459 /* We're ready to receive frames, enable the sub-crq interrupts and
460 * set the logical link state to up
461 */
462 for (i = 0; i < adapter->req_rx_queues; i++)
463 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
464
465 for (i = 0; i < adapter->req_tx_queues; i++)
466 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
467
468 memset(&crq, 0, sizeof(crq));
469 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
470 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
471 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
472 ibmvnic_send_crq(adapter, &crq);
473
474 netif_tx_start_all_queues(netdev);
475
476 return 0;
477
478 bounce_map_failed:
479 kfree(adapter->bounce_buffer);
480 bounce_alloc_failed:
481 i = tx_subcrqs - 1;
482 kfree(adapter->tx_pool[i].free_map);
483 tx_fm_alloc_failed:
484 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
485 tx_ltb_alloc_failed:
486 kfree(adapter->tx_pool[i].tx_buff);
487 tx_pool_alloc_failed:
488 for (j = 0; j < i; j++) {
489 kfree(adapter->tx_pool[j].tx_buff);
490 free_long_term_buff(adapter,
491 &adapter->tx_pool[j].long_term_buff);
492 kfree(adapter->tx_pool[j].free_map);
493 }
494 kfree(adapter->tx_pool);
495 adapter->tx_pool = NULL;
496 tx_pool_arr_alloc_failed:
497 i = rxadd_subcrqs;
498 rx_pool_alloc_failed:
499 for (j = 0; j < i; j++) {
500 free_rx_pool(adapter, &adapter->rx_pool[j]);
501 free_long_term_buff(adapter,
502 &adapter->rx_pool[j].long_term_buff);
503 }
504 kfree(adapter->rx_pool);
505 adapter->rx_pool = NULL;
506 rx_pool_arr_alloc_failed:
507 for (i = 0; i < adapter->req_rx_queues; i++)
508 napi_enable(&adapter->napi[i]);
509 alloc_napi_failed:
510 return -ENOMEM;
511 }
512
513 static int ibmvnic_close(struct net_device *netdev)
514 {
515 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
516 struct device *dev = &adapter->vdev->dev;
517 union ibmvnic_crq crq;
518 int i;
519
520 adapter->closing = true;
521
522 for (i = 0; i < adapter->req_rx_queues; i++)
523 napi_disable(&adapter->napi[i]);
524
525 netif_tx_stop_all_queues(netdev);
526
527 if (adapter->bounce_buffer) {
528 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
529 dma_unmap_single(&adapter->vdev->dev,
530 adapter->bounce_buffer_dma,
531 adapter->bounce_buffer_size,
532 DMA_BIDIRECTIONAL);
533 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
534 }
535 kfree(adapter->bounce_buffer);
536 adapter->bounce_buffer = NULL;
537 }
538
539 memset(&crq, 0, sizeof(crq));
540 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
541 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
542 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
543 ibmvnic_send_crq(adapter, &crq);
544
545 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
546 i++) {
547 kfree(adapter->tx_pool[i].tx_buff);
548 free_long_term_buff(adapter,
549 &adapter->tx_pool[i].long_term_buff);
550 kfree(adapter->tx_pool[i].free_map);
551 }
552 kfree(adapter->tx_pool);
553 adapter->tx_pool = NULL;
554
555 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
556 i++) {
557 free_rx_pool(adapter, &adapter->rx_pool[i]);
558 free_long_term_buff(adapter,
559 &adapter->rx_pool[i].long_term_buff);
560 }
561 kfree(adapter->rx_pool);
562 adapter->rx_pool = NULL;
563
564 adapter->closing = false;
565
566 return 0;
567 }
568
569 /**
570 * build_hdr_data - creates L2/L3/L4 header data buffer
571 * @hdr_field - bitfield determining needed headers
572 * @skb - socket buffer
573 * @hdr_len - array of header lengths
574 * @tot_len - total length of data
575 *
576 * Reads hdr_field to determine which headers are needed by firmware.
577 * Builds a buffer containing these headers. Saves individual header
578 * lengths and total buffer length to be used to build descriptors.
579 */
580 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
581 int *hdr_len, u8 *hdr_data)
582 {
583 int len = 0;
584 u8 *hdr;
585
586 hdr_len[0] = sizeof(struct ethhdr);
587
588 if (skb->protocol == htons(ETH_P_IP)) {
589 hdr_len[1] = ip_hdr(skb)->ihl * 4;
590 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
591 hdr_len[2] = tcp_hdrlen(skb);
592 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
593 hdr_len[2] = sizeof(struct udphdr);
594 } else if (skb->protocol == htons(ETH_P_IPV6)) {
595 hdr_len[1] = sizeof(struct ipv6hdr);
596 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
597 hdr_len[2] = tcp_hdrlen(skb);
598 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
599 hdr_len[2] = sizeof(struct udphdr);
600 }
601
602 memset(hdr_data, 0, 120);
603 if ((hdr_field >> 6) & 1) {
604 hdr = skb_mac_header(skb);
605 memcpy(hdr_data, hdr, hdr_len[0]);
606 len += hdr_len[0];
607 }
608
609 if ((hdr_field >> 5) & 1) {
610 hdr = skb_network_header(skb);
611 memcpy(hdr_data + len, hdr, hdr_len[1]);
612 len += hdr_len[1];
613 }
614
615 if ((hdr_field >> 4) & 1) {
616 hdr = skb_transport_header(skb);
617 memcpy(hdr_data + len, hdr, hdr_len[2]);
618 len += hdr_len[2];
619 }
620 return len;
621 }
622
623 /**
624 * create_hdr_descs - create header and header extension descriptors
625 * @hdr_field - bitfield determining needed headers
626 * @data - buffer containing header data
627 * @len - length of data buffer
628 * @hdr_len - array of individual header lengths
629 * @scrq_arr - descriptor array
630 *
631 * Creates header and, if needed, header extension descriptors and
632 * places them in a descriptor array, scrq_arr
633 */
634
635 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
636 union sub_crq *scrq_arr)
637 {
638 union sub_crq hdr_desc;
639 int tmp_len = len;
640 u8 *data, *cur;
641 int tmp;
642
643 while (tmp_len > 0) {
644 cur = hdr_data + len - tmp_len;
645
646 memset(&hdr_desc, 0, sizeof(hdr_desc));
647 if (cur != hdr_data) {
648 data = hdr_desc.hdr_ext.data;
649 tmp = tmp_len > 29 ? 29 : tmp_len;
650 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
651 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
652 hdr_desc.hdr_ext.len = tmp;
653 } else {
654 data = hdr_desc.hdr.data;
655 tmp = tmp_len > 24 ? 24 : tmp_len;
656 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
657 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
658 hdr_desc.hdr.len = tmp;
659 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
660 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
661 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
662 hdr_desc.hdr.flag = hdr_field << 1;
663 }
664 memcpy(data, cur, tmp);
665 tmp_len -= tmp;
666 *scrq_arr = hdr_desc;
667 scrq_arr++;
668 }
669 }
670
671 /**
672 * build_hdr_descs_arr - build a header descriptor array
673 * @skb - socket buffer
674 * @num_entries - number of descriptors to be sent
675 * @subcrq - first TX descriptor
676 * @hdr_field - bit field determining which headers will be sent
677 *
678 * This function will build a TX descriptor array with applicable
679 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
680 */
681
682 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
683 int *num_entries, u8 hdr_field)
684 {
685 int hdr_len[3] = {0, 0, 0};
686 int tot_len, len;
687 u8 *hdr_data = txbuff->hdr_data;
688
689 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
690 txbuff->hdr_data);
691 len = tot_len;
692 len -= 24;
693 if (len > 0)
694 num_entries += len % 29 ? len / 29 + 1 : len / 29;
695 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
696 txbuff->indir_arr + 1);
697 }
698
699 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
700 {
701 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
702 int queue_num = skb_get_queue_mapping(skb);
703 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
704 struct device *dev = &adapter->vdev->dev;
705 struct ibmvnic_tx_buff *tx_buff = NULL;
706 struct ibmvnic_tx_pool *tx_pool;
707 unsigned int tx_send_failed = 0;
708 unsigned int tx_map_failed = 0;
709 unsigned int tx_dropped = 0;
710 unsigned int tx_packets = 0;
711 unsigned int tx_bytes = 0;
712 dma_addr_t data_dma_addr;
713 struct netdev_queue *txq;
714 bool used_bounce = false;
715 unsigned long lpar_rc;
716 union sub_crq tx_crq;
717 unsigned int offset;
718 int num_entries = 1;
719 unsigned char *dst;
720 u64 *handle_array;
721 int index = 0;
722 int ret = 0;
723
724 tx_pool = &adapter->tx_pool[queue_num];
725 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
726 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
727 be32_to_cpu(adapter->login_rsp_buf->
728 off_txsubm_subcrqs));
729 if (adapter->migrated) {
730 tx_send_failed++;
731 tx_dropped++;
732 ret = NETDEV_TX_BUSY;
733 goto out;
734 }
735
736 index = tx_pool->free_map[tx_pool->consumer_index];
737 offset = index * adapter->req_mtu;
738 dst = tx_pool->long_term_buff.buff + offset;
739 memset(dst, 0, adapter->req_mtu);
740 skb_copy_from_linear_data(skb, dst, skb->len);
741 data_dma_addr = tx_pool->long_term_buff.addr + offset;
742
743 tx_pool->consumer_index =
744 (tx_pool->consumer_index + 1) %
745 adapter->max_tx_entries_per_subcrq;
746
747 tx_buff = &tx_pool->tx_buff[index];
748 tx_buff->skb = skb;
749 tx_buff->data_dma[0] = data_dma_addr;
750 tx_buff->data_len[0] = skb->len;
751 tx_buff->index = index;
752 tx_buff->pool_index = queue_num;
753 tx_buff->last_frag = true;
754 tx_buff->used_bounce = used_bounce;
755
756 memset(&tx_crq, 0, sizeof(tx_crq));
757 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
758 tx_crq.v1.type = IBMVNIC_TX_DESC;
759 tx_crq.v1.n_crq_elem = 1;
760 tx_crq.v1.n_sge = 1;
761 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
762 tx_crq.v1.correlator = cpu_to_be32(index);
763 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
764 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
765 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
766
767 if (adapter->vlan_header_insertion) {
768 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
769 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
770 }
771
772 if (skb->protocol == htons(ETH_P_IP)) {
773 if (ip_hdr(skb)->version == 4)
774 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
775 else if (ip_hdr(skb)->version == 6)
776 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
777
778 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
779 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
780 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
781 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
782 }
783
784 if (skb->ip_summed == CHECKSUM_PARTIAL) {
785 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
786 hdrs += 2;
787 }
788 /* determine if l2/3/4 headers are sent to firmware */
789 if ((*hdrs >> 7) & 1 &&
790 (skb->protocol == htons(ETH_P_IP) ||
791 skb->protocol == htons(ETH_P_IPV6))) {
792 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
793 tx_crq.v1.n_crq_elem = num_entries;
794 tx_buff->indir_arr[0] = tx_crq;
795 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
796 sizeof(tx_buff->indir_arr),
797 DMA_TO_DEVICE);
798 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
799 if (!firmware_has_feature(FW_FEATURE_CMO))
800 dev_err(dev, "tx: unable to map descriptor array\n");
801 tx_map_failed++;
802 tx_dropped++;
803 ret = NETDEV_TX_BUSY;
804 goto out;
805 }
806 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
807 (u64)tx_buff->indir_dma,
808 (u64)num_entries);
809 } else {
810 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
811 &tx_crq);
812 }
813 if (lpar_rc != H_SUCCESS) {
814 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
815
816 if (tx_pool->consumer_index == 0)
817 tx_pool->consumer_index =
818 adapter->max_tx_entries_per_subcrq - 1;
819 else
820 tx_pool->consumer_index--;
821
822 tx_send_failed++;
823 tx_dropped++;
824 ret = NETDEV_TX_BUSY;
825 goto out;
826 }
827 tx_packets++;
828 tx_bytes += skb->len;
829 txq->trans_start = jiffies;
830 ret = NETDEV_TX_OK;
831
832 out:
833 netdev->stats.tx_dropped += tx_dropped;
834 netdev->stats.tx_bytes += tx_bytes;
835 netdev->stats.tx_packets += tx_packets;
836 adapter->tx_send_failed += tx_send_failed;
837 adapter->tx_map_failed += tx_map_failed;
838
839 return ret;
840 }
841
842 static void ibmvnic_set_multi(struct net_device *netdev)
843 {
844 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
845 struct netdev_hw_addr *ha;
846 union ibmvnic_crq crq;
847
848 memset(&crq, 0, sizeof(crq));
849 crq.request_capability.first = IBMVNIC_CRQ_CMD;
850 crq.request_capability.cmd = REQUEST_CAPABILITY;
851
852 if (netdev->flags & IFF_PROMISC) {
853 if (!adapter->promisc_supported)
854 return;
855 } else {
856 if (netdev->flags & IFF_ALLMULTI) {
857 /* Accept all multicast */
858 memset(&crq, 0, sizeof(crq));
859 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
860 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
861 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
862 ibmvnic_send_crq(adapter, &crq);
863 } else if (netdev_mc_empty(netdev)) {
864 /* Reject all multicast */
865 memset(&crq, 0, sizeof(crq));
866 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
867 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
868 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
869 ibmvnic_send_crq(adapter, &crq);
870 } else {
871 /* Accept one or more multicast(s) */
872 netdev_for_each_mc_addr(ha, netdev) {
873 memset(&crq, 0, sizeof(crq));
874 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
875 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
876 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
877 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
878 ha->addr);
879 ibmvnic_send_crq(adapter, &crq);
880 }
881 }
882 }
883 }
884
885 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
886 {
887 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
888 struct sockaddr *addr = p;
889 union ibmvnic_crq crq;
890
891 if (!is_valid_ether_addr(addr->sa_data))
892 return -EADDRNOTAVAIL;
893
894 memset(&crq, 0, sizeof(crq));
895 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
896 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
897 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
898 ibmvnic_send_crq(adapter, &crq);
899 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
900 return 0;
901 }
902
903 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
904 {
905 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
906
907 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
908 return -EINVAL;
909
910 netdev->mtu = new_mtu;
911 return 0;
912 }
913
914 static void ibmvnic_tx_timeout(struct net_device *dev)
915 {
916 struct ibmvnic_adapter *adapter = netdev_priv(dev);
917 int rc;
918
919 /* Adapter timed out, resetting it */
920 release_sub_crqs(adapter);
921 rc = ibmvnic_reset_crq(adapter);
922 if (rc)
923 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
924 else
925 ibmvnic_send_crq_init(adapter);
926 }
927
928 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
929 struct ibmvnic_rx_buff *rx_buff)
930 {
931 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
932
933 rx_buff->skb = NULL;
934
935 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
936 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
937
938 atomic_dec(&pool->available);
939 }
940
941 static int ibmvnic_poll(struct napi_struct *napi, int budget)
942 {
943 struct net_device *netdev = napi->dev;
944 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
945 int scrq_num = (int)(napi - adapter->napi);
946 int frames_processed = 0;
947 restart_poll:
948 while (frames_processed < budget) {
949 struct sk_buff *skb;
950 struct ibmvnic_rx_buff *rx_buff;
951 union sub_crq *next;
952 u32 length;
953 u16 offset;
954 u8 flags = 0;
955
956 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
957 break;
958 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
959 rx_buff =
960 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
961 rx_comp.correlator);
962 /* do error checking */
963 if (next->rx_comp.rc) {
964 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
965 /* free the entry */
966 next->rx_comp.first = 0;
967 remove_buff_from_pool(adapter, rx_buff);
968 break;
969 }
970
971 length = be32_to_cpu(next->rx_comp.len);
972 offset = be16_to_cpu(next->rx_comp.off_frame_data);
973 flags = next->rx_comp.flags;
974 skb = rx_buff->skb;
975 skb_copy_to_linear_data(skb, rx_buff->data + offset,
976 length);
977 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
978 /* free the entry */
979 next->rx_comp.first = 0;
980 remove_buff_from_pool(adapter, rx_buff);
981
982 skb_put(skb, length);
983 skb->protocol = eth_type_trans(skb, netdev);
984
985 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
986 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
987 skb->ip_summed = CHECKSUM_UNNECESSARY;
988 }
989
990 length = skb->len;
991 napi_gro_receive(napi, skb); /* send it up */
992 netdev->stats.rx_packets++;
993 netdev->stats.rx_bytes += length;
994 frames_processed++;
995 }
996 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
997
998 if (frames_processed < budget) {
999 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1000 napi_complete(napi);
1001 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1002 napi_reschedule(napi)) {
1003 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1004 goto restart_poll;
1005 }
1006 }
1007 return frames_processed;
1008 }
1009
1010 #ifdef CONFIG_NET_POLL_CONTROLLER
1011 static void ibmvnic_netpoll_controller(struct net_device *dev)
1012 {
1013 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1014 int i;
1015
1016 replenish_pools(netdev_priv(dev));
1017 for (i = 0; i < adapter->req_rx_queues; i++)
1018 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1019 adapter->rx_scrq[i]);
1020 }
1021 #endif
1022
1023 static const struct net_device_ops ibmvnic_netdev_ops = {
1024 .ndo_open = ibmvnic_open,
1025 .ndo_stop = ibmvnic_close,
1026 .ndo_start_xmit = ibmvnic_xmit,
1027 .ndo_set_rx_mode = ibmvnic_set_multi,
1028 .ndo_set_mac_address = ibmvnic_set_mac,
1029 .ndo_validate_addr = eth_validate_addr,
1030 .ndo_change_mtu = ibmvnic_change_mtu,
1031 .ndo_tx_timeout = ibmvnic_tx_timeout,
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033 .ndo_poll_controller = ibmvnic_netpoll_controller,
1034 #endif
1035 };
1036
1037 /* ethtool functions */
1038
1039 static int ibmvnic_get_settings(struct net_device *netdev,
1040 struct ethtool_cmd *cmd)
1041 {
1042 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1043 SUPPORTED_FIBRE);
1044 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1045 ADVERTISED_FIBRE);
1046 ethtool_cmd_speed_set(cmd, SPEED_1000);
1047 cmd->duplex = DUPLEX_FULL;
1048 cmd->port = PORT_FIBRE;
1049 cmd->phy_address = 0;
1050 cmd->transceiver = XCVR_INTERNAL;
1051 cmd->autoneg = AUTONEG_ENABLE;
1052 cmd->maxtxpkt = 0;
1053 cmd->maxrxpkt = 1;
1054 return 0;
1055 }
1056
1057 static void ibmvnic_get_drvinfo(struct net_device *dev,
1058 struct ethtool_drvinfo *info)
1059 {
1060 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1061 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1062 }
1063
1064 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1065 {
1066 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1067
1068 return adapter->msg_enable;
1069 }
1070
1071 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1072 {
1073 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1074
1075 adapter->msg_enable = data;
1076 }
1077
1078 static u32 ibmvnic_get_link(struct net_device *netdev)
1079 {
1080 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1081
1082 /* Don't need to send a query because we request a logical link up at
1083 * init and then we wait for link state indications
1084 */
1085 return adapter->logical_link_state;
1086 }
1087
1088 static void ibmvnic_get_ringparam(struct net_device *netdev,
1089 struct ethtool_ringparam *ring)
1090 {
1091 ring->rx_max_pending = 0;
1092 ring->tx_max_pending = 0;
1093 ring->rx_mini_max_pending = 0;
1094 ring->rx_jumbo_max_pending = 0;
1095 ring->rx_pending = 0;
1096 ring->tx_pending = 0;
1097 ring->rx_mini_pending = 0;
1098 ring->rx_jumbo_pending = 0;
1099 }
1100
1101 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1102 {
1103 int i;
1104
1105 if (stringset != ETH_SS_STATS)
1106 return;
1107
1108 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1109 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1110 }
1111
1112 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1113 {
1114 switch (sset) {
1115 case ETH_SS_STATS:
1116 return ARRAY_SIZE(ibmvnic_stats);
1117 default:
1118 return -EOPNOTSUPP;
1119 }
1120 }
1121
1122 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1123 struct ethtool_stats *stats, u64 *data)
1124 {
1125 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1126 union ibmvnic_crq crq;
1127 int i;
1128
1129 memset(&crq, 0, sizeof(crq));
1130 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1131 crq.request_statistics.cmd = REQUEST_STATISTICS;
1132 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1133 crq.request_statistics.len =
1134 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1135 ibmvnic_send_crq(adapter, &crq);
1136
1137 /* Wait for data to be written */
1138 init_completion(&adapter->stats_done);
1139 wait_for_completion(&adapter->stats_done);
1140
1141 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1142 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1143 }
1144
1145 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1146 .get_settings = ibmvnic_get_settings,
1147 .get_drvinfo = ibmvnic_get_drvinfo,
1148 .get_msglevel = ibmvnic_get_msglevel,
1149 .set_msglevel = ibmvnic_set_msglevel,
1150 .get_link = ibmvnic_get_link,
1151 .get_ringparam = ibmvnic_get_ringparam,
1152 .get_strings = ibmvnic_get_strings,
1153 .get_sset_count = ibmvnic_get_sset_count,
1154 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1155 };
1156
1157 /* Routines for managing CRQs/sCRQs */
1158
1159 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1160 struct ibmvnic_sub_crq_queue *scrq)
1161 {
1162 struct device *dev = &adapter->vdev->dev;
1163 long rc;
1164
1165 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1166
1167 /* Close the sub-crqs */
1168 do {
1169 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1170 adapter->vdev->unit_address,
1171 scrq->crq_num);
1172 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1173
1174 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1175 DMA_BIDIRECTIONAL);
1176 free_pages((unsigned long)scrq->msgs, 2);
1177 kfree(scrq);
1178 }
1179
1180 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1181 *adapter)
1182 {
1183 struct device *dev = &adapter->vdev->dev;
1184 struct ibmvnic_sub_crq_queue *scrq;
1185 int rc;
1186
1187 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1188 if (!scrq)
1189 return NULL;
1190
1191 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1192 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1193 if (!scrq->msgs) {
1194 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1195 goto zero_page_failed;
1196 }
1197
1198 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1199 DMA_BIDIRECTIONAL);
1200 if (dma_mapping_error(dev, scrq->msg_token)) {
1201 dev_warn(dev, "Couldn't map crq queue messages page\n");
1202 goto map_failed;
1203 }
1204
1205 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1206 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1207
1208 if (rc == H_RESOURCE)
1209 rc = ibmvnic_reset_crq(adapter);
1210
1211 if (rc == H_CLOSED) {
1212 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1213 } else if (rc) {
1214 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1215 goto reg_failed;
1216 }
1217
1218 scrq->adapter = adapter;
1219 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1220 scrq->cur = 0;
1221 scrq->rx_skb_top = NULL;
1222 spin_lock_init(&scrq->lock);
1223
1224 netdev_dbg(adapter->netdev,
1225 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1226 scrq->crq_num, scrq->hw_irq, scrq->irq);
1227
1228 return scrq;
1229
1230 reg_failed:
1231 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1232 DMA_BIDIRECTIONAL);
1233 map_failed:
1234 free_pages((unsigned long)scrq->msgs, 2);
1235 zero_page_failed:
1236 kfree(scrq);
1237
1238 return NULL;
1239 }
1240
1241 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1242 {
1243 int i;
1244
1245 if (adapter->tx_scrq) {
1246 for (i = 0; i < adapter->req_tx_queues; i++)
1247 if (adapter->tx_scrq[i]) {
1248 free_irq(adapter->tx_scrq[i]->irq,
1249 adapter->tx_scrq[i]);
1250 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1251 release_sub_crq_queue(adapter,
1252 adapter->tx_scrq[i]);
1253 }
1254 adapter->tx_scrq = NULL;
1255 }
1256
1257 if (adapter->rx_scrq) {
1258 for (i = 0; i < adapter->req_rx_queues; i++)
1259 if (adapter->rx_scrq[i]) {
1260 free_irq(adapter->rx_scrq[i]->irq,
1261 adapter->rx_scrq[i]);
1262 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1263 release_sub_crq_queue(adapter,
1264 adapter->rx_scrq[i]);
1265 }
1266 adapter->rx_scrq = NULL;
1267 }
1268
1269 adapter->requested_caps = 0;
1270 }
1271
1272 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1273 {
1274 int i;
1275
1276 if (adapter->tx_scrq) {
1277 for (i = 0; i < adapter->req_tx_queues; i++)
1278 if (adapter->tx_scrq[i])
1279 release_sub_crq_queue(adapter,
1280 adapter->tx_scrq[i]);
1281 adapter->tx_scrq = NULL;
1282 }
1283
1284 if (adapter->rx_scrq) {
1285 for (i = 0; i < adapter->req_rx_queues; i++)
1286 if (adapter->rx_scrq[i])
1287 release_sub_crq_queue(adapter,
1288 adapter->rx_scrq[i]);
1289 adapter->rx_scrq = NULL;
1290 }
1291
1292 adapter->requested_caps = 0;
1293 }
1294
1295 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1296 struct ibmvnic_sub_crq_queue *scrq)
1297 {
1298 struct device *dev = &adapter->vdev->dev;
1299 unsigned long rc;
1300
1301 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1302 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1303 if (rc)
1304 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1305 scrq->hw_irq, rc);
1306 return rc;
1307 }
1308
1309 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1310 struct ibmvnic_sub_crq_queue *scrq)
1311 {
1312 struct device *dev = &adapter->vdev->dev;
1313 unsigned long rc;
1314
1315 if (scrq->hw_irq > 0x100000000ULL) {
1316 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1317 return 1;
1318 }
1319
1320 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1321 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1322 if (rc)
1323 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1324 scrq->hw_irq, rc);
1325 return rc;
1326 }
1327
1328 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1329 struct ibmvnic_sub_crq_queue *scrq)
1330 {
1331 struct device *dev = &adapter->vdev->dev;
1332 struct ibmvnic_tx_buff *txbuff;
1333 union sub_crq *next;
1334 int index;
1335 int i, j;
1336 u8 first;
1337
1338 restart_loop:
1339 while (pending_scrq(adapter, scrq)) {
1340 unsigned int pool = scrq->pool_index;
1341
1342 next = ibmvnic_next_scrq(adapter, scrq);
1343 for (i = 0; i < next->tx_comp.num_comps; i++) {
1344 if (next->tx_comp.rcs[i]) {
1345 dev_err(dev, "tx error %x\n",
1346 next->tx_comp.rcs[i]);
1347 continue;
1348 }
1349 index = be32_to_cpu(next->tx_comp.correlators[i]);
1350 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1351
1352 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1353 if (!txbuff->data_dma[j])
1354 continue;
1355
1356 txbuff->data_dma[j] = 0;
1357 txbuff->used_bounce = false;
1358 }
1359 /* if sub_crq was sent indirectly */
1360 first = txbuff->indir_arr[0].generic.first;
1361 if (first == IBMVNIC_CRQ_CMD) {
1362 dma_unmap_single(dev, txbuff->indir_dma,
1363 sizeof(txbuff->indir_arr),
1364 DMA_TO_DEVICE);
1365 }
1366
1367 if (txbuff->last_frag)
1368 dev_kfree_skb_any(txbuff->skb);
1369
1370 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1371 producer_index] = index;
1372 adapter->tx_pool[pool].producer_index =
1373 (adapter->tx_pool[pool].producer_index + 1) %
1374 adapter->max_tx_entries_per_subcrq;
1375 }
1376 /* remove tx_comp scrq*/
1377 next->tx_comp.first = 0;
1378 }
1379
1380 enable_scrq_irq(adapter, scrq);
1381
1382 if (pending_scrq(adapter, scrq)) {
1383 disable_scrq_irq(adapter, scrq);
1384 goto restart_loop;
1385 }
1386
1387 return 0;
1388 }
1389
1390 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1391 {
1392 struct ibmvnic_sub_crq_queue *scrq = instance;
1393 struct ibmvnic_adapter *adapter = scrq->adapter;
1394
1395 disable_scrq_irq(adapter, scrq);
1396 ibmvnic_complete_tx(adapter, scrq);
1397
1398 return IRQ_HANDLED;
1399 }
1400
1401 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1402 {
1403 struct ibmvnic_sub_crq_queue *scrq = instance;
1404 struct ibmvnic_adapter *adapter = scrq->adapter;
1405
1406 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1407 disable_scrq_irq(adapter, scrq);
1408 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1409 }
1410
1411 return IRQ_HANDLED;
1412 }
1413
1414 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1415 {
1416 struct device *dev = &adapter->vdev->dev;
1417 struct ibmvnic_sub_crq_queue *scrq;
1418 int i = 0, j = 0;
1419 int rc = 0;
1420
1421 for (i = 0; i < adapter->req_tx_queues; i++) {
1422 scrq = adapter->tx_scrq[i];
1423 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1424
1425 if (scrq->irq == NO_IRQ) {
1426 rc = -EINVAL;
1427 dev_err(dev, "Error mapping irq\n");
1428 goto req_tx_irq_failed;
1429 }
1430
1431 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1432 0, "ibmvnic_tx", scrq);
1433
1434 if (rc) {
1435 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1436 scrq->irq, rc);
1437 irq_dispose_mapping(scrq->irq);
1438 goto req_rx_irq_failed;
1439 }
1440 }
1441
1442 for (i = 0; i < adapter->req_rx_queues; i++) {
1443 scrq = adapter->rx_scrq[i];
1444 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1445 if (scrq->irq == NO_IRQ) {
1446 rc = -EINVAL;
1447 dev_err(dev, "Error mapping irq\n");
1448 goto req_rx_irq_failed;
1449 }
1450 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1451 0, "ibmvnic_rx", scrq);
1452 if (rc) {
1453 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1454 scrq->irq, rc);
1455 irq_dispose_mapping(scrq->irq);
1456 goto req_rx_irq_failed;
1457 }
1458 }
1459 return rc;
1460
1461 req_rx_irq_failed:
1462 for (j = 0; j < i; j++)
1463 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1464 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1465 i = adapter->req_tx_queues;
1466 req_tx_irq_failed:
1467 for (j = 0; j < i; j++)
1468 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1469 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1470 release_sub_crqs_no_irqs(adapter);
1471 return rc;
1472 }
1473
1474 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1475 {
1476 struct device *dev = &adapter->vdev->dev;
1477 struct ibmvnic_sub_crq_queue **allqueues;
1478 int registered_queues = 0;
1479 union ibmvnic_crq crq;
1480 int total_queues;
1481 int more = 0;
1482 int i;
1483
1484 if (!retry) {
1485 /* Sub-CRQ entries are 32 byte long */
1486 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1487
1488 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1489 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1490 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1491 goto allqueues_failed;
1492 }
1493
1494 /* Get the minimum between the queried max and the entries
1495 * that fit in our PAGE_SIZE
1496 */
1497 adapter->req_tx_entries_per_subcrq =
1498 adapter->max_tx_entries_per_subcrq > entries_page ?
1499 entries_page : adapter->max_tx_entries_per_subcrq;
1500 adapter->req_rx_add_entries_per_subcrq =
1501 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1502 entries_page : adapter->max_rx_add_entries_per_subcrq;
1503
1504 /* Choosing the maximum number of queues supported by firmware*/
1505 adapter->req_tx_queues = adapter->max_tx_queues;
1506 adapter->req_rx_queues = adapter->max_rx_queues;
1507 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1508
1509 adapter->req_mtu = adapter->max_mtu;
1510 }
1511
1512 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1513
1514 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1515 if (!allqueues)
1516 goto allqueues_failed;
1517
1518 for (i = 0; i < total_queues; i++) {
1519 allqueues[i] = init_sub_crq_queue(adapter);
1520 if (!allqueues[i]) {
1521 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1522 break;
1523 }
1524 registered_queues++;
1525 }
1526
1527 /* Make sure we were able to register the minimum number of queues */
1528 if (registered_queues <
1529 adapter->min_tx_queues + adapter->min_rx_queues) {
1530 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1531 goto tx_failed;
1532 }
1533
1534 /* Distribute the failed allocated queues*/
1535 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1536 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1537 switch (i % 3) {
1538 case 0:
1539 if (adapter->req_rx_queues > adapter->min_rx_queues)
1540 adapter->req_rx_queues--;
1541 else
1542 more++;
1543 break;
1544 case 1:
1545 if (adapter->req_tx_queues > adapter->min_tx_queues)
1546 adapter->req_tx_queues--;
1547 else
1548 more++;
1549 break;
1550 }
1551 }
1552
1553 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1554 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1555 if (!adapter->tx_scrq)
1556 goto tx_failed;
1557
1558 for (i = 0; i < adapter->req_tx_queues; i++) {
1559 adapter->tx_scrq[i] = allqueues[i];
1560 adapter->tx_scrq[i]->pool_index = i;
1561 }
1562
1563 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1564 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1565 if (!adapter->rx_scrq)
1566 goto rx_failed;
1567
1568 for (i = 0; i < adapter->req_rx_queues; i++) {
1569 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1570 adapter->rx_scrq[i]->scrq_num = i;
1571 }
1572
1573 memset(&crq, 0, sizeof(crq));
1574 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1575 crq.request_capability.cmd = REQUEST_CAPABILITY;
1576
1577 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1578 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1579 ibmvnic_send_crq(adapter, &crq);
1580
1581 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1582 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1583 ibmvnic_send_crq(adapter, &crq);
1584
1585 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1586 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1587 ibmvnic_send_crq(adapter, &crq);
1588
1589 crq.request_capability.capability =
1590 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1591 crq.request_capability.number =
1592 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1593 ibmvnic_send_crq(adapter, &crq);
1594
1595 crq.request_capability.capability =
1596 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1597 crq.request_capability.number =
1598 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1599 ibmvnic_send_crq(adapter, &crq);
1600
1601 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1602 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1603 ibmvnic_send_crq(adapter, &crq);
1604
1605 if (adapter->netdev->flags & IFF_PROMISC) {
1606 if (adapter->promisc_supported) {
1607 crq.request_capability.capability =
1608 cpu_to_be16(PROMISC_REQUESTED);
1609 crq.request_capability.number = cpu_to_be64(1);
1610 ibmvnic_send_crq(adapter, &crq);
1611 }
1612 } else {
1613 crq.request_capability.capability =
1614 cpu_to_be16(PROMISC_REQUESTED);
1615 crq.request_capability.number = cpu_to_be64(0);
1616 ibmvnic_send_crq(adapter, &crq);
1617 }
1618
1619 kfree(allqueues);
1620
1621 return;
1622
1623 rx_failed:
1624 kfree(adapter->tx_scrq);
1625 adapter->tx_scrq = NULL;
1626 tx_failed:
1627 for (i = 0; i < registered_queues; i++)
1628 release_sub_crq_queue(adapter, allqueues[i]);
1629 kfree(allqueues);
1630 allqueues_failed:
1631 ibmvnic_remove(adapter->vdev);
1632 }
1633
1634 static int pending_scrq(struct ibmvnic_adapter *adapter,
1635 struct ibmvnic_sub_crq_queue *scrq)
1636 {
1637 union sub_crq *entry = &scrq->msgs[scrq->cur];
1638
1639 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1640 return 1;
1641 else
1642 return 0;
1643 }
1644
1645 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1646 struct ibmvnic_sub_crq_queue *scrq)
1647 {
1648 union sub_crq *entry;
1649 unsigned long flags;
1650
1651 spin_lock_irqsave(&scrq->lock, flags);
1652 entry = &scrq->msgs[scrq->cur];
1653 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1654 if (++scrq->cur == scrq->size)
1655 scrq->cur = 0;
1656 } else {
1657 entry = NULL;
1658 }
1659 spin_unlock_irqrestore(&scrq->lock, flags);
1660
1661 return entry;
1662 }
1663
1664 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1665 {
1666 struct ibmvnic_crq_queue *queue = &adapter->crq;
1667 union ibmvnic_crq *crq;
1668
1669 crq = &queue->msgs[queue->cur];
1670 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1671 if (++queue->cur == queue->size)
1672 queue->cur = 0;
1673 } else {
1674 crq = NULL;
1675 }
1676
1677 return crq;
1678 }
1679
1680 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1681 union sub_crq *sub_crq)
1682 {
1683 unsigned int ua = adapter->vdev->unit_address;
1684 struct device *dev = &adapter->vdev->dev;
1685 u64 *u64_crq = (u64 *)sub_crq;
1686 int rc;
1687
1688 netdev_dbg(adapter->netdev,
1689 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1690 (unsigned long int)cpu_to_be64(remote_handle),
1691 (unsigned long int)cpu_to_be64(u64_crq[0]),
1692 (unsigned long int)cpu_to_be64(u64_crq[1]),
1693 (unsigned long int)cpu_to_be64(u64_crq[2]),
1694 (unsigned long int)cpu_to_be64(u64_crq[3]));
1695
1696 /* Make sure the hypervisor sees the complete request */
1697 mb();
1698
1699 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1700 cpu_to_be64(remote_handle),
1701 cpu_to_be64(u64_crq[0]),
1702 cpu_to_be64(u64_crq[1]),
1703 cpu_to_be64(u64_crq[2]),
1704 cpu_to_be64(u64_crq[3]));
1705
1706 if (rc) {
1707 if (rc == H_CLOSED)
1708 dev_warn(dev, "CRQ Queue closed\n");
1709 dev_err(dev, "Send error (rc=%d)\n", rc);
1710 }
1711
1712 return rc;
1713 }
1714
1715 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1716 u64 remote_handle, u64 ioba, u64 num_entries)
1717 {
1718 unsigned int ua = adapter->vdev->unit_address;
1719 struct device *dev = &adapter->vdev->dev;
1720 int rc;
1721
1722 /* Make sure the hypervisor sees the complete request */
1723 mb();
1724 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1725 cpu_to_be64(remote_handle),
1726 ioba, num_entries);
1727
1728 if (rc) {
1729 if (rc == H_CLOSED)
1730 dev_warn(dev, "CRQ Queue closed\n");
1731 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1732 }
1733
1734 return rc;
1735 }
1736
1737 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1738 union ibmvnic_crq *crq)
1739 {
1740 unsigned int ua = adapter->vdev->unit_address;
1741 struct device *dev = &adapter->vdev->dev;
1742 u64 *u64_crq = (u64 *)crq;
1743 int rc;
1744
1745 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1746 (unsigned long int)cpu_to_be64(u64_crq[0]),
1747 (unsigned long int)cpu_to_be64(u64_crq[1]));
1748
1749 /* Make sure the hypervisor sees the complete request */
1750 mb();
1751
1752 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1753 cpu_to_be64(u64_crq[0]),
1754 cpu_to_be64(u64_crq[1]));
1755
1756 if (rc) {
1757 if (rc == H_CLOSED)
1758 dev_warn(dev, "CRQ Queue closed\n");
1759 dev_warn(dev, "Send error (rc=%d)\n", rc);
1760 }
1761
1762 return rc;
1763 }
1764
1765 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1766 {
1767 union ibmvnic_crq crq;
1768
1769 memset(&crq, 0, sizeof(crq));
1770 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1771 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1772 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1773
1774 return ibmvnic_send_crq(adapter, &crq);
1775 }
1776
1777 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1778 {
1779 union ibmvnic_crq crq;
1780
1781 memset(&crq, 0, sizeof(crq));
1782 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1783 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1784 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1785
1786 return ibmvnic_send_crq(adapter, &crq);
1787 }
1788
1789 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1790 {
1791 union ibmvnic_crq crq;
1792
1793 memset(&crq, 0, sizeof(crq));
1794 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1795 crq.version_exchange.cmd = VERSION_EXCHANGE;
1796 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1797
1798 return ibmvnic_send_crq(adapter, &crq);
1799 }
1800
1801 static void send_login(struct ibmvnic_adapter *adapter)
1802 {
1803 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1804 struct ibmvnic_login_buffer *login_buffer;
1805 struct ibmvnic_inflight_cmd *inflight_cmd;
1806 struct device *dev = &adapter->vdev->dev;
1807 dma_addr_t rsp_buffer_token;
1808 dma_addr_t buffer_token;
1809 size_t rsp_buffer_size;
1810 union ibmvnic_crq crq;
1811 unsigned long flags;
1812 size_t buffer_size;
1813 __be64 *tx_list_p;
1814 __be64 *rx_list_p;
1815 int i;
1816
1817 buffer_size =
1818 sizeof(struct ibmvnic_login_buffer) +
1819 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1820
1821 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1822 if (!login_buffer)
1823 goto buf_alloc_failed;
1824
1825 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1826 DMA_TO_DEVICE);
1827 if (dma_mapping_error(dev, buffer_token)) {
1828 dev_err(dev, "Couldn't map login buffer\n");
1829 goto buf_map_failed;
1830 }
1831
1832 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1833 sizeof(u64) * adapter->req_tx_queues +
1834 sizeof(u64) * adapter->req_rx_queues +
1835 sizeof(u64) * adapter->req_rx_queues +
1836 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1837
1838 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1839 if (!login_rsp_buffer)
1840 goto buf_rsp_alloc_failed;
1841
1842 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1843 rsp_buffer_size, DMA_FROM_DEVICE);
1844 if (dma_mapping_error(dev, rsp_buffer_token)) {
1845 dev_err(dev, "Couldn't map login rsp buffer\n");
1846 goto buf_rsp_map_failed;
1847 }
1848 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1849 if (!inflight_cmd) {
1850 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1851 goto inflight_alloc_failed;
1852 }
1853 adapter->login_buf = login_buffer;
1854 adapter->login_buf_token = buffer_token;
1855 adapter->login_buf_sz = buffer_size;
1856 adapter->login_rsp_buf = login_rsp_buffer;
1857 adapter->login_rsp_buf_token = rsp_buffer_token;
1858 adapter->login_rsp_buf_sz = rsp_buffer_size;
1859
1860 login_buffer->len = cpu_to_be32(buffer_size);
1861 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1862 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1863 login_buffer->off_txcomp_subcrqs =
1864 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1865 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1866 login_buffer->off_rxcomp_subcrqs =
1867 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1868 sizeof(u64) * adapter->req_tx_queues);
1869 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1870 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1871
1872 tx_list_p = (__be64 *)((char *)login_buffer +
1873 sizeof(struct ibmvnic_login_buffer));
1874 rx_list_p = (__be64 *)((char *)login_buffer +
1875 sizeof(struct ibmvnic_login_buffer) +
1876 sizeof(u64) * adapter->req_tx_queues);
1877
1878 for (i = 0; i < adapter->req_tx_queues; i++) {
1879 if (adapter->tx_scrq[i]) {
1880 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1881 crq_num);
1882 }
1883 }
1884
1885 for (i = 0; i < adapter->req_rx_queues; i++) {
1886 if (adapter->rx_scrq[i]) {
1887 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1888 crq_num);
1889 }
1890 }
1891
1892 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1893 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1894 netdev_dbg(adapter->netdev, "%016lx\n",
1895 ((unsigned long int *)(adapter->login_buf))[i]);
1896 }
1897
1898 memset(&crq, 0, sizeof(crq));
1899 crq.login.first = IBMVNIC_CRQ_CMD;
1900 crq.login.cmd = LOGIN;
1901 crq.login.ioba = cpu_to_be32(buffer_token);
1902 crq.login.len = cpu_to_be32(buffer_size);
1903
1904 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1905
1906 spin_lock_irqsave(&adapter->inflight_lock, flags);
1907 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1908 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1909
1910 ibmvnic_send_crq(adapter, &crq);
1911
1912 return;
1913
1914 inflight_alloc_failed:
1915 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1916 DMA_FROM_DEVICE);
1917 buf_rsp_map_failed:
1918 kfree(login_rsp_buffer);
1919 buf_rsp_alloc_failed:
1920 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1921 buf_map_failed:
1922 kfree(login_buffer);
1923 buf_alloc_failed:
1924 return;
1925 }
1926
1927 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1928 u32 len, u8 map_id)
1929 {
1930 union ibmvnic_crq crq;
1931
1932 memset(&crq, 0, sizeof(crq));
1933 crq.request_map.first = IBMVNIC_CRQ_CMD;
1934 crq.request_map.cmd = REQUEST_MAP;
1935 crq.request_map.map_id = map_id;
1936 crq.request_map.ioba = cpu_to_be32(addr);
1937 crq.request_map.len = cpu_to_be32(len);
1938 ibmvnic_send_crq(adapter, &crq);
1939 }
1940
1941 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1942 {
1943 union ibmvnic_crq crq;
1944
1945 memset(&crq, 0, sizeof(crq));
1946 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1947 crq.request_unmap.cmd = REQUEST_UNMAP;
1948 crq.request_unmap.map_id = map_id;
1949 ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 static void send_map_query(struct ibmvnic_adapter *adapter)
1953 {
1954 union ibmvnic_crq crq;
1955
1956 memset(&crq, 0, sizeof(crq));
1957 crq.query_map.first = IBMVNIC_CRQ_CMD;
1958 crq.query_map.cmd = QUERY_MAP;
1959 ibmvnic_send_crq(adapter, &crq);
1960 }
1961
1962 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1963 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1964 {
1965 union ibmvnic_crq crq;
1966
1967 atomic_set(&adapter->running_cap_queries, 0);
1968 memset(&crq, 0, sizeof(crq));
1969 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1970 crq.query_capability.cmd = QUERY_CAPABILITY;
1971
1972 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1973 atomic_inc(&adapter->running_cap_queries);
1974 ibmvnic_send_crq(adapter, &crq);
1975
1976 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1977 atomic_inc(&adapter->running_cap_queries);
1978 ibmvnic_send_crq(adapter, &crq);
1979
1980 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1981 atomic_inc(&adapter->running_cap_queries);
1982 ibmvnic_send_crq(adapter, &crq);
1983
1984 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1985 atomic_inc(&adapter->running_cap_queries);
1986 ibmvnic_send_crq(adapter, &crq);
1987
1988 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1989 atomic_inc(&adapter->running_cap_queries);
1990 ibmvnic_send_crq(adapter, &crq);
1991
1992 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1993 atomic_inc(&adapter->running_cap_queries);
1994 ibmvnic_send_crq(adapter, &crq);
1995
1996 crq.query_capability.capability =
1997 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1998 atomic_inc(&adapter->running_cap_queries);
1999 ibmvnic_send_crq(adapter, &crq);
2000
2001 crq.query_capability.capability =
2002 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2003 atomic_inc(&adapter->running_cap_queries);
2004 ibmvnic_send_crq(adapter, &crq);
2005
2006 crq.query_capability.capability =
2007 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2008 atomic_inc(&adapter->running_cap_queries);
2009 ibmvnic_send_crq(adapter, &crq);
2010
2011 crq.query_capability.capability =
2012 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2013 atomic_inc(&adapter->running_cap_queries);
2014 ibmvnic_send_crq(adapter, &crq);
2015
2016 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2017 atomic_inc(&adapter->running_cap_queries);
2018 ibmvnic_send_crq(adapter, &crq);
2019
2020 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2021 atomic_inc(&adapter->running_cap_queries);
2022 ibmvnic_send_crq(adapter, &crq);
2023
2024 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2025 atomic_inc(&adapter->running_cap_queries);
2026 ibmvnic_send_crq(adapter, &crq);
2027
2028 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2029 atomic_inc(&adapter->running_cap_queries);
2030 ibmvnic_send_crq(adapter, &crq);
2031
2032 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2033 atomic_inc(&adapter->running_cap_queries);
2034 ibmvnic_send_crq(adapter, &crq);
2035
2036 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2037 atomic_inc(&adapter->running_cap_queries);
2038 ibmvnic_send_crq(adapter, &crq);
2039
2040 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2041 atomic_inc(&adapter->running_cap_queries);
2042 ibmvnic_send_crq(adapter, &crq);
2043
2044 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2045 atomic_inc(&adapter->running_cap_queries);
2046 ibmvnic_send_crq(adapter, &crq);
2047
2048 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2049 atomic_inc(&adapter->running_cap_queries);
2050 ibmvnic_send_crq(adapter, &crq);
2051
2052 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2053 atomic_inc(&adapter->running_cap_queries);
2054 ibmvnic_send_crq(adapter, &crq);
2055
2056 crq.query_capability.capability =
2057 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2058 atomic_inc(&adapter->running_cap_queries);
2059 ibmvnic_send_crq(adapter, &crq);
2060
2061 crq.query_capability.capability =
2062 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2063 atomic_inc(&adapter->running_cap_queries);
2064 ibmvnic_send_crq(adapter, &crq);
2065
2066 crq.query_capability.capability =
2067 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2068 atomic_inc(&adapter->running_cap_queries);
2069 ibmvnic_send_crq(adapter, &crq);
2070
2071 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2072 atomic_inc(&adapter->running_cap_queries);
2073 ibmvnic_send_crq(adapter, &crq);
2074 }
2075
2076 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2077 {
2078 struct device *dev = &adapter->vdev->dev;
2079 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2080 union ibmvnic_crq crq;
2081 int i;
2082
2083 dma_unmap_single(dev, adapter->ip_offload_tok,
2084 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2085
2086 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2087 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2088 netdev_dbg(adapter->netdev, "%016lx\n",
2089 ((unsigned long int *)(buf))[i]);
2090
2091 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2092 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2093 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2094 buf->tcp_ipv4_chksum);
2095 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2096 buf->tcp_ipv6_chksum);
2097 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2098 buf->udp_ipv4_chksum);
2099 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2100 buf->udp_ipv6_chksum);
2101 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2102 buf->large_tx_ipv4);
2103 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2104 buf->large_tx_ipv6);
2105 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2106 buf->large_rx_ipv4);
2107 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2108 buf->large_rx_ipv6);
2109 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2110 buf->max_ipv4_header_size);
2111 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2112 buf->max_ipv6_header_size);
2113 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2114 buf->max_tcp_header_size);
2115 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2116 buf->max_udp_header_size);
2117 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2118 buf->max_large_tx_size);
2119 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2120 buf->max_large_rx_size);
2121 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2122 buf->ipv6_extension_header);
2123 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2124 buf->tcp_pseudosum_req);
2125 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2126 buf->num_ipv6_ext_headers);
2127 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2128 buf->off_ipv6_ext_headers);
2129
2130 adapter->ip_offload_ctrl_tok =
2131 dma_map_single(dev, &adapter->ip_offload_ctrl,
2132 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2133
2134 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2135 dev_err(dev, "Couldn't map ip offload control buffer\n");
2136 return;
2137 }
2138
2139 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2140 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2141 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2142 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2143 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2144
2145 /* large_tx/rx disabled for now, additional features needed */
2146 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2147 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2148 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2149 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2150
2151 adapter->netdev->features = NETIF_F_GSO;
2152
2153 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2154 adapter->netdev->features |= NETIF_F_IP_CSUM;
2155
2156 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2157 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2158
2159 if ((adapter->netdev->features &
2160 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2161 adapter->netdev->features |= NETIF_F_RXCSUM;
2162
2163 memset(&crq, 0, sizeof(crq));
2164 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2165 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2166 crq.control_ip_offload.len =
2167 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2168 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2169 ibmvnic_send_crq(adapter, &crq);
2170 }
2171
2172 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2173 struct ibmvnic_adapter *adapter)
2174 {
2175 struct device *dev = &adapter->vdev->dev;
2176 struct ibmvnic_error_buff *error_buff, *tmp;
2177 unsigned long flags;
2178 bool found = false;
2179 int i;
2180
2181 if (!crq->request_error_rsp.rc.code) {
2182 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2183 crq->request_error_rsp.rc.code);
2184 return;
2185 }
2186
2187 spin_lock_irqsave(&adapter->error_list_lock, flags);
2188 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2189 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2190 found = true;
2191 list_del(&error_buff->list);
2192 break;
2193 }
2194 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2195
2196 if (!found) {
2197 dev_err(dev, "Couldn't find error id %x\n",
2198 crq->request_error_rsp.error_id);
2199 return;
2200 }
2201
2202 dev_err(dev, "Detailed info for error id %x:",
2203 crq->request_error_rsp.error_id);
2204
2205 for (i = 0; i < error_buff->len; i++) {
2206 pr_cont("%02x", (int)error_buff->buff[i]);
2207 if (i % 8 == 7)
2208 pr_cont(" ");
2209 }
2210 pr_cont("\n");
2211
2212 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2213 DMA_FROM_DEVICE);
2214 kfree(error_buff->buff);
2215 kfree(error_buff);
2216 }
2217
2218 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2219 struct ibmvnic_adapter *adapter)
2220 {
2221 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2222 struct ibmvnic_inflight_cmd *inflight_cmd;
2223 struct device *dev = &adapter->vdev->dev;
2224 union ibmvnic_crq newcrq;
2225 unsigned long flags;
2226
2227 /* allocate and map buffer */
2228 adapter->dump_data = kmalloc(len, GFP_KERNEL);
2229 if (!adapter->dump_data) {
2230 complete(&adapter->fw_done);
2231 return;
2232 }
2233
2234 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2235 DMA_FROM_DEVICE);
2236
2237 if (dma_mapping_error(dev, adapter->dump_data_token)) {
2238 if (!firmware_has_feature(FW_FEATURE_CMO))
2239 dev_err(dev, "Couldn't map dump data\n");
2240 kfree(adapter->dump_data);
2241 complete(&adapter->fw_done);
2242 return;
2243 }
2244
2245 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2246 if (!inflight_cmd) {
2247 dma_unmap_single(dev, adapter->dump_data_token, len,
2248 DMA_FROM_DEVICE);
2249 kfree(adapter->dump_data);
2250 complete(&adapter->fw_done);
2251 return;
2252 }
2253
2254 memset(&newcrq, 0, sizeof(newcrq));
2255 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2256 newcrq.request_dump.cmd = REQUEST_DUMP;
2257 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2258 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2259
2260 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2261
2262 spin_lock_irqsave(&adapter->inflight_lock, flags);
2263 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2264 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2265
2266 ibmvnic_send_crq(adapter, &newcrq);
2267 }
2268
2269 static void handle_error_indication(union ibmvnic_crq *crq,
2270 struct ibmvnic_adapter *adapter)
2271 {
2272 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2273 struct ibmvnic_inflight_cmd *inflight_cmd;
2274 struct device *dev = &adapter->vdev->dev;
2275 struct ibmvnic_error_buff *error_buff;
2276 union ibmvnic_crq new_crq;
2277 unsigned long flags;
2278
2279 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2280 crq->error_indication.
2281 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2282 crq->error_indication.error_id,
2283 crq->error_indication.error_cause);
2284
2285 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2286 if (!error_buff)
2287 return;
2288
2289 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2290 if (!error_buff->buff) {
2291 kfree(error_buff);
2292 return;
2293 }
2294
2295 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2296 DMA_FROM_DEVICE);
2297 if (dma_mapping_error(dev, error_buff->dma)) {
2298 if (!firmware_has_feature(FW_FEATURE_CMO))
2299 dev_err(dev, "Couldn't map error buffer\n");
2300 kfree(error_buff->buff);
2301 kfree(error_buff);
2302 return;
2303 }
2304
2305 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2306 if (!inflight_cmd) {
2307 dma_unmap_single(dev, error_buff->dma, detail_len,
2308 DMA_FROM_DEVICE);
2309 kfree(error_buff->buff);
2310 kfree(error_buff);
2311 return;
2312 }
2313
2314 error_buff->len = detail_len;
2315 error_buff->error_id = crq->error_indication.error_id;
2316
2317 spin_lock_irqsave(&adapter->error_list_lock, flags);
2318 list_add_tail(&error_buff->list, &adapter->errors);
2319 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2320
2321 memset(&new_crq, 0, sizeof(new_crq));
2322 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2323 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2324 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2325 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2326 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2327
2328 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2329
2330 spin_lock_irqsave(&adapter->inflight_lock, flags);
2331 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2332 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2333
2334 ibmvnic_send_crq(adapter, &new_crq);
2335 }
2336
2337 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2338 struct ibmvnic_adapter *adapter)
2339 {
2340 struct net_device *netdev = adapter->netdev;
2341 struct device *dev = &adapter->vdev->dev;
2342 long rc;
2343
2344 rc = crq->change_mac_addr_rsp.rc.code;
2345 if (rc) {
2346 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2347 return;
2348 }
2349 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2350 ETH_ALEN);
2351 }
2352
2353 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2354 struct ibmvnic_adapter *adapter)
2355 {
2356 struct device *dev = &adapter->vdev->dev;
2357 u64 *req_value;
2358 char *name;
2359
2360 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2361 case REQ_TX_QUEUES:
2362 req_value = &adapter->req_tx_queues;
2363 name = "tx";
2364 break;
2365 case REQ_RX_QUEUES:
2366 req_value = &adapter->req_rx_queues;
2367 name = "rx";
2368 break;
2369 case REQ_RX_ADD_QUEUES:
2370 req_value = &adapter->req_rx_add_queues;
2371 name = "rx_add";
2372 break;
2373 case REQ_TX_ENTRIES_PER_SUBCRQ:
2374 req_value = &adapter->req_tx_entries_per_subcrq;
2375 name = "tx_entries_per_subcrq";
2376 break;
2377 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2378 req_value = &adapter->req_rx_add_entries_per_subcrq;
2379 name = "rx_add_entries_per_subcrq";
2380 break;
2381 case REQ_MTU:
2382 req_value = &adapter->req_mtu;
2383 name = "mtu";
2384 break;
2385 case PROMISC_REQUESTED:
2386 req_value = &adapter->promisc;
2387 name = "promisc";
2388 break;
2389 default:
2390 dev_err(dev, "Got invalid cap request rsp %d\n",
2391 crq->request_capability.capability);
2392 return;
2393 }
2394
2395 switch (crq->request_capability_rsp.rc.code) {
2396 case SUCCESS:
2397 break;
2398 case PARTIALSUCCESS:
2399 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2400 *req_value,
2401 (long int)be32_to_cpu(crq->request_capability_rsp.
2402 number), name);
2403 release_sub_crqs_no_irqs(adapter);
2404 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2405 init_sub_crqs(adapter, 1);
2406 return;
2407 default:
2408 dev_err(dev, "Error %d in request cap rsp\n",
2409 crq->request_capability_rsp.rc.code);
2410 return;
2411 }
2412
2413 /* Done receiving requested capabilities, query IP offload support */
2414 if (++adapter->requested_caps == 7) {
2415 union ibmvnic_crq newcrq;
2416 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2417 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2418 &adapter->ip_offload_buf;
2419
2420 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2421 buf_sz,
2422 DMA_FROM_DEVICE);
2423
2424 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2425 if (!firmware_has_feature(FW_FEATURE_CMO))
2426 dev_err(dev, "Couldn't map offload buffer\n");
2427 return;
2428 }
2429
2430 memset(&newcrq, 0, sizeof(newcrq));
2431 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2432 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2433 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2434 newcrq.query_ip_offload.ioba =
2435 cpu_to_be32(adapter->ip_offload_tok);
2436
2437 ibmvnic_send_crq(adapter, &newcrq);
2438 }
2439 }
2440
2441 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2442 struct ibmvnic_adapter *adapter)
2443 {
2444 struct device *dev = &adapter->vdev->dev;
2445 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2446 struct ibmvnic_login_buffer *login = adapter->login_buf;
2447 union ibmvnic_crq crq;
2448 int i;
2449
2450 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2451 DMA_BIDIRECTIONAL);
2452 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2453 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2454
2455 /* If the number of queues requested can't be allocated by the
2456 * server, the login response will return with code 1. We will need
2457 * to resend the login buffer with fewer queues requested.
2458 */
2459 if (login_rsp_crq->generic.rc.code) {
2460 adapter->renegotiate = true;
2461 complete(&adapter->init_done);
2462 return 0;
2463 }
2464
2465 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2466 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2467 netdev_dbg(adapter->netdev, "%016lx\n",
2468 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2469 }
2470
2471 /* Sanity checks */
2472 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2473 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2474 adapter->req_rx_add_queues !=
2475 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2476 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2477 ibmvnic_remove(adapter->vdev);
2478 return -EIO;
2479 }
2480 complete(&adapter->init_done);
2481
2482 memset(&crq, 0, sizeof(crq));
2483 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2484 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2485 ibmvnic_send_crq(adapter, &crq);
2486
2487 return 0;
2488 }
2489
2490 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2491 struct ibmvnic_adapter *adapter)
2492 {
2493 struct device *dev = &adapter->vdev->dev;
2494 u8 map_id = crq->request_map_rsp.map_id;
2495 int tx_subcrqs;
2496 int rx_subcrqs;
2497 long rc;
2498 int i;
2499
2500 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2501 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2502
2503 rc = crq->request_map_rsp.rc.code;
2504 if (rc) {
2505 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2506 adapter->map_id--;
2507 /* need to find and zero tx/rx_pool map_id */
2508 for (i = 0; i < tx_subcrqs; i++) {
2509 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2510 adapter->tx_pool[i].long_term_buff.map_id = 0;
2511 }
2512 for (i = 0; i < rx_subcrqs; i++) {
2513 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2514 adapter->rx_pool[i].long_term_buff.map_id = 0;
2515 }
2516 }
2517 complete(&adapter->fw_done);
2518 }
2519
2520 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2521 struct ibmvnic_adapter *adapter)
2522 {
2523 struct device *dev = &adapter->vdev->dev;
2524 long rc;
2525
2526 rc = crq->request_unmap_rsp.rc.code;
2527 if (rc)
2528 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2529 }
2530
2531 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2532 struct ibmvnic_adapter *adapter)
2533 {
2534 struct net_device *netdev = adapter->netdev;
2535 struct device *dev = &adapter->vdev->dev;
2536 long rc;
2537
2538 rc = crq->query_map_rsp.rc.code;
2539 if (rc) {
2540 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2541 return;
2542 }
2543 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2544 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2545 crq->query_map_rsp.free_pages);
2546 }
2547
2548 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2549 struct ibmvnic_adapter *adapter)
2550 {
2551 struct net_device *netdev = adapter->netdev;
2552 struct device *dev = &adapter->vdev->dev;
2553 long rc;
2554
2555 atomic_dec(&adapter->running_cap_queries);
2556 netdev_dbg(netdev, "Outstanding queries: %d\n",
2557 atomic_read(&adapter->running_cap_queries));
2558 rc = crq->query_capability.rc.code;
2559 if (rc) {
2560 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2561 goto out;
2562 }
2563
2564 switch (be16_to_cpu(crq->query_capability.capability)) {
2565 case MIN_TX_QUEUES:
2566 adapter->min_tx_queues =
2567 be64_to_cpu(crq->query_capability.number);
2568 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2569 adapter->min_tx_queues);
2570 break;
2571 case MIN_RX_QUEUES:
2572 adapter->min_rx_queues =
2573 be64_to_cpu(crq->query_capability.number);
2574 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2575 adapter->min_rx_queues);
2576 break;
2577 case MIN_RX_ADD_QUEUES:
2578 adapter->min_rx_add_queues =
2579 be64_to_cpu(crq->query_capability.number);
2580 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2581 adapter->min_rx_add_queues);
2582 break;
2583 case MAX_TX_QUEUES:
2584 adapter->max_tx_queues =
2585 be64_to_cpu(crq->query_capability.number);
2586 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2587 adapter->max_tx_queues);
2588 break;
2589 case MAX_RX_QUEUES:
2590 adapter->max_rx_queues =
2591 be64_to_cpu(crq->query_capability.number);
2592 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2593 adapter->max_rx_queues);
2594 break;
2595 case MAX_RX_ADD_QUEUES:
2596 adapter->max_rx_add_queues =
2597 be64_to_cpu(crq->query_capability.number);
2598 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2599 adapter->max_rx_add_queues);
2600 break;
2601 case MIN_TX_ENTRIES_PER_SUBCRQ:
2602 adapter->min_tx_entries_per_subcrq =
2603 be64_to_cpu(crq->query_capability.number);
2604 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2605 adapter->min_tx_entries_per_subcrq);
2606 break;
2607 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2608 adapter->min_rx_add_entries_per_subcrq =
2609 be64_to_cpu(crq->query_capability.number);
2610 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2611 adapter->min_rx_add_entries_per_subcrq);
2612 break;
2613 case MAX_TX_ENTRIES_PER_SUBCRQ:
2614 adapter->max_tx_entries_per_subcrq =
2615 be64_to_cpu(crq->query_capability.number);
2616 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2617 adapter->max_tx_entries_per_subcrq);
2618 break;
2619 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2620 adapter->max_rx_add_entries_per_subcrq =
2621 be64_to_cpu(crq->query_capability.number);
2622 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2623 adapter->max_rx_add_entries_per_subcrq);
2624 break;
2625 case TCP_IP_OFFLOAD:
2626 adapter->tcp_ip_offload =
2627 be64_to_cpu(crq->query_capability.number);
2628 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2629 adapter->tcp_ip_offload);
2630 break;
2631 case PROMISC_SUPPORTED:
2632 adapter->promisc_supported =
2633 be64_to_cpu(crq->query_capability.number);
2634 netdev_dbg(netdev, "promisc_supported = %lld\n",
2635 adapter->promisc_supported);
2636 break;
2637 case MIN_MTU:
2638 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2639 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2640 break;
2641 case MAX_MTU:
2642 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2643 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2644 break;
2645 case MAX_MULTICAST_FILTERS:
2646 adapter->max_multicast_filters =
2647 be64_to_cpu(crq->query_capability.number);
2648 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2649 adapter->max_multicast_filters);
2650 break;
2651 case VLAN_HEADER_INSERTION:
2652 adapter->vlan_header_insertion =
2653 be64_to_cpu(crq->query_capability.number);
2654 if (adapter->vlan_header_insertion)
2655 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2656 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2657 adapter->vlan_header_insertion);
2658 break;
2659 case MAX_TX_SG_ENTRIES:
2660 adapter->max_tx_sg_entries =
2661 be64_to_cpu(crq->query_capability.number);
2662 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2663 adapter->max_tx_sg_entries);
2664 break;
2665 case RX_SG_SUPPORTED:
2666 adapter->rx_sg_supported =
2667 be64_to_cpu(crq->query_capability.number);
2668 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2669 adapter->rx_sg_supported);
2670 break;
2671 case OPT_TX_COMP_SUB_QUEUES:
2672 adapter->opt_tx_comp_sub_queues =
2673 be64_to_cpu(crq->query_capability.number);
2674 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2675 adapter->opt_tx_comp_sub_queues);
2676 break;
2677 case OPT_RX_COMP_QUEUES:
2678 adapter->opt_rx_comp_queues =
2679 be64_to_cpu(crq->query_capability.number);
2680 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2681 adapter->opt_rx_comp_queues);
2682 break;
2683 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2684 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2685 be64_to_cpu(crq->query_capability.number);
2686 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2687 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2688 break;
2689 case OPT_TX_ENTRIES_PER_SUBCRQ:
2690 adapter->opt_tx_entries_per_subcrq =
2691 be64_to_cpu(crq->query_capability.number);
2692 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2693 adapter->opt_tx_entries_per_subcrq);
2694 break;
2695 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2696 adapter->opt_rxba_entries_per_subcrq =
2697 be64_to_cpu(crq->query_capability.number);
2698 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2699 adapter->opt_rxba_entries_per_subcrq);
2700 break;
2701 case TX_RX_DESC_REQ:
2702 adapter->tx_rx_desc_req = crq->query_capability.number;
2703 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2704 adapter->tx_rx_desc_req);
2705 break;
2706
2707 default:
2708 netdev_err(netdev, "Got invalid cap rsp %d\n",
2709 crq->query_capability.capability);
2710 }
2711
2712 out:
2713 if (atomic_read(&adapter->running_cap_queries) == 0)
2714 init_sub_crqs(adapter, 0);
2715 /* We're done querying the capabilities, initialize sub-crqs */
2716 }
2717
2718 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2719 struct ibmvnic_adapter *adapter)
2720 {
2721 u8 correlator = crq->control_ras_rsp.correlator;
2722 struct device *dev = &adapter->vdev->dev;
2723 bool found = false;
2724 int i;
2725
2726 if (crq->control_ras_rsp.rc.code) {
2727 dev_warn(dev, "Control ras failed rc=%d\n",
2728 crq->control_ras_rsp.rc.code);
2729 return;
2730 }
2731
2732 for (i = 0; i < adapter->ras_comp_num; i++) {
2733 if (adapter->ras_comps[i].correlator == correlator) {
2734 found = true;
2735 break;
2736 }
2737 }
2738
2739 if (!found) {
2740 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2741 return;
2742 }
2743
2744 switch (crq->control_ras_rsp.op) {
2745 case IBMVNIC_TRACE_LEVEL:
2746 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2747 break;
2748 case IBMVNIC_ERROR_LEVEL:
2749 adapter->ras_comps[i].error_check_level =
2750 crq->control_ras.level;
2751 break;
2752 case IBMVNIC_TRACE_PAUSE:
2753 adapter->ras_comp_int[i].paused = 1;
2754 break;
2755 case IBMVNIC_TRACE_RESUME:
2756 adapter->ras_comp_int[i].paused = 0;
2757 break;
2758 case IBMVNIC_TRACE_ON:
2759 adapter->ras_comps[i].trace_on = 1;
2760 break;
2761 case IBMVNIC_TRACE_OFF:
2762 adapter->ras_comps[i].trace_on = 0;
2763 break;
2764 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2765 /* trace_buff_sz is 3 bytes, stuff it into an int */
2766 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2767 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2768 crq->control_ras_rsp.trace_buff_sz[0];
2769 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2770 crq->control_ras_rsp.trace_buff_sz[1];
2771 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2772 crq->control_ras_rsp.trace_buff_sz[2];
2773 break;
2774 default:
2775 dev_err(dev, "invalid op %d on control_ras_rsp",
2776 crq->control_ras_rsp.op);
2777 }
2778 }
2779
2780 static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2781 {
2782 file->private_data = inode->i_private;
2783 return 0;
2784 }
2785
2786 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2787 loff_t *ppos)
2788 {
2789 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2790 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2791 struct device *dev = &adapter->vdev->dev;
2792 struct ibmvnic_fw_trace_entry *trace;
2793 int num = ras_comp_int->num;
2794 union ibmvnic_crq crq;
2795 dma_addr_t trace_tok;
2796
2797 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2798 return 0;
2799
2800 trace =
2801 dma_alloc_coherent(dev,
2802 be32_to_cpu(adapter->ras_comps[num].
2803 trace_buff_size), &trace_tok,
2804 GFP_KERNEL);
2805 if (!trace) {
2806 dev_err(dev, "Couldn't alloc trace buffer\n");
2807 return 0;
2808 }
2809
2810 memset(&crq, 0, sizeof(crq));
2811 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2812 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2813 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2814 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2815 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2816 ibmvnic_send_crq(adapter, &crq);
2817
2818 init_completion(&adapter->fw_done);
2819 wait_for_completion(&adapter->fw_done);
2820
2821 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2822 len =
2823 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2824 *ppos;
2825
2826 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2827
2828 dma_free_coherent(dev,
2829 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2830 trace, trace_tok);
2831 *ppos += len;
2832 return len;
2833 }
2834
2835 static const struct file_operations trace_ops = {
2836 .owner = THIS_MODULE,
2837 .open = ibmvnic_fw_comp_open,
2838 .read = trace_read,
2839 };
2840
2841 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2842 loff_t *ppos)
2843 {
2844 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2845 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2846 int num = ras_comp_int->num;
2847 char buff[5]; /* 1 or 0 plus \n and \0 */
2848 int size;
2849
2850 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2851
2852 if (*ppos >= size)
2853 return 0;
2854
2855 copy_to_user(user_buf, buff, size);
2856 *ppos += size;
2857 return size;
2858 }
2859
2860 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2861 size_t len, loff_t *ppos)
2862 {
2863 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2864 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2865 int num = ras_comp_int->num;
2866 union ibmvnic_crq crq;
2867 unsigned long val;
2868 char buff[9]; /* decimal max int plus \n and \0 */
2869
2870 copy_from_user(buff, user_buf, sizeof(buff));
2871 val = kstrtoul(buff, 10, NULL);
2872
2873 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2874
2875 memset(&crq, 0, sizeof(crq));
2876 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2877 crq.control_ras.cmd = CONTROL_RAS;
2878 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2879 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2880 ibmvnic_send_crq(adapter, &crq);
2881
2882 return len;
2883 }
2884
2885 static const struct file_operations paused_ops = {
2886 .owner = THIS_MODULE,
2887 .open = ibmvnic_fw_comp_open,
2888 .read = paused_read,
2889 .write = paused_write,
2890 };
2891
2892 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2893 size_t len, loff_t *ppos)
2894 {
2895 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2896 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2897 int num = ras_comp_int->num;
2898 char buff[5]; /* 1 or 0 plus \n and \0 */
2899 int size;
2900
2901 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2902
2903 if (*ppos >= size)
2904 return 0;
2905
2906 copy_to_user(user_buf, buff, size);
2907 *ppos += size;
2908 return size;
2909 }
2910
2911 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2912 size_t len, loff_t *ppos)
2913 {
2914 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2915 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2916 int num = ras_comp_int->num;
2917 union ibmvnic_crq crq;
2918 unsigned long val;
2919 char buff[9]; /* decimal max int plus \n and \0 */
2920
2921 copy_from_user(buff, user_buf, sizeof(buff));
2922 val = kstrtoul(buff, 10, NULL);
2923
2924 memset(&crq, 0, sizeof(crq));
2925 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2926 crq.control_ras.cmd = CONTROL_RAS;
2927 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2928 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2929
2930 return len;
2931 }
2932
2933 static const struct file_operations tracing_ops = {
2934 .owner = THIS_MODULE,
2935 .open = ibmvnic_fw_comp_open,
2936 .read = tracing_read,
2937 .write = tracing_write,
2938 };
2939
2940 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2941 size_t len, loff_t *ppos)
2942 {
2943 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2944 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2945 int num = ras_comp_int->num;
2946 char buff[5]; /* decimal max char plus \n and \0 */
2947 int size;
2948
2949 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2950
2951 if (*ppos >= size)
2952 return 0;
2953
2954 copy_to_user(user_buf, buff, size);
2955 *ppos += size;
2956 return size;
2957 }
2958
2959 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2960 size_t len, loff_t *ppos)
2961 {
2962 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2963 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2964 int num = ras_comp_int->num;
2965 union ibmvnic_crq crq;
2966 unsigned long val;
2967 char buff[9]; /* decimal max int plus \n and \0 */
2968
2969 copy_from_user(buff, user_buf, sizeof(buff));
2970 val = kstrtoul(buff, 10, NULL);
2971
2972 if (val > 9)
2973 val = 9;
2974
2975 memset(&crq, 0, sizeof(crq));
2976 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2977 crq.control_ras.cmd = CONTROL_RAS;
2978 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2979 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2980 crq.control_ras.level = val;
2981 ibmvnic_send_crq(adapter, &crq);
2982
2983 return len;
2984 }
2985
2986 static const struct file_operations error_level_ops = {
2987 .owner = THIS_MODULE,
2988 .open = ibmvnic_fw_comp_open,
2989 .read = error_level_read,
2990 .write = error_level_write,
2991 };
2992
2993 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2994 size_t len, loff_t *ppos)
2995 {
2996 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2997 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2998 int num = ras_comp_int->num;
2999 char buff[5]; /* decimal max char plus \n and \0 */
3000 int size;
3001
3002 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3003 if (*ppos >= size)
3004 return 0;
3005
3006 copy_to_user(user_buf, buff, size);
3007 *ppos += size;
3008 return size;
3009 }
3010
3011 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3012 size_t len, loff_t *ppos)
3013 {
3014 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3015 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3016 union ibmvnic_crq crq;
3017 unsigned long val;
3018 char buff[9]; /* decimal max int plus \n and \0 */
3019
3020 copy_from_user(buff, user_buf, sizeof(buff));
3021 val = kstrtoul(buff, 10, NULL);
3022 if (val > 9)
3023 val = 9;
3024
3025 memset(&crq, 0, sizeof(crq));
3026 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3027 crq.control_ras.cmd = CONTROL_RAS;
3028 crq.control_ras.correlator =
3029 adapter->ras_comps[ras_comp_int->num].correlator;
3030 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3031 crq.control_ras.level = val;
3032 ibmvnic_send_crq(adapter, &crq);
3033
3034 return len;
3035 }
3036
3037 static const struct file_operations trace_level_ops = {
3038 .owner = THIS_MODULE,
3039 .open = ibmvnic_fw_comp_open,
3040 .read = trace_level_read,
3041 .write = trace_level_write,
3042 };
3043
3044 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3045 size_t len, loff_t *ppos)
3046 {
3047 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3048 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3049 int num = ras_comp_int->num;
3050 char buff[9]; /* decimal max int plus \n and \0 */
3051 int size;
3052
3053 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3054 if (*ppos >= size)
3055 return 0;
3056
3057 copy_to_user(user_buf, buff, size);
3058 *ppos += size;
3059 return size;
3060 }
3061
3062 static ssize_t trace_buff_size_write(struct file *file,
3063 const char __user *user_buf, size_t len,
3064 loff_t *ppos)
3065 {
3066 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3067 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3068 union ibmvnic_crq crq;
3069 unsigned long val;
3070 char buff[9]; /* decimal max int plus \n and \0 */
3071
3072 copy_from_user(buff, user_buf, sizeof(buff));
3073 val = kstrtoul(buff, 10, NULL);
3074
3075 memset(&crq, 0, sizeof(crq));
3076 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3077 crq.control_ras.cmd = CONTROL_RAS;
3078 crq.control_ras.correlator =
3079 adapter->ras_comps[ras_comp_int->num].correlator;
3080 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3081 /* trace_buff_sz is 3 bytes, stuff an int into it */
3082 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3083 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3084 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3085 ibmvnic_send_crq(adapter, &crq);
3086
3087 return len;
3088 }
3089
3090 static const struct file_operations trace_size_ops = {
3091 .owner = THIS_MODULE,
3092 .open = ibmvnic_fw_comp_open,
3093 .read = trace_buff_size_read,
3094 .write = trace_buff_size_write,
3095 };
3096
3097 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3098 struct ibmvnic_adapter *adapter)
3099 {
3100 struct device *dev = &adapter->vdev->dev;
3101 struct dentry *dir_ent;
3102 struct dentry *ent;
3103 int i;
3104
3105 debugfs_remove_recursive(adapter->ras_comps_ent);
3106
3107 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3108 adapter->debugfs_dir);
3109 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3110 dev_info(dev, "debugfs create ras_comps dir failed\n");
3111 return;
3112 }
3113
3114 for (i = 0; i < adapter->ras_comp_num; i++) {
3115 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3116 adapter->ras_comps_ent);
3117 if (!dir_ent || IS_ERR(dir_ent)) {
3118 dev_info(dev, "debugfs create %s dir failed\n",
3119 adapter->ras_comps[i].name);
3120 continue;
3121 }
3122
3123 adapter->ras_comp_int[i].adapter = adapter;
3124 adapter->ras_comp_int[i].num = i;
3125 adapter->ras_comp_int[i].desc_blob.data =
3126 &adapter->ras_comps[i].description;
3127 adapter->ras_comp_int[i].desc_blob.size =
3128 sizeof(adapter->ras_comps[i].description);
3129
3130 /* Don't need to remember the dentry's because the debugfs dir
3131 * gets removed recursively
3132 */
3133 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3134 &adapter->ras_comp_int[i].desc_blob);
3135 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3136 dir_ent, &adapter->ras_comp_int[i],
3137 &trace_size_ops);
3138 ent = debugfs_create_file("trace_level",
3139 S_IRUGO |
3140 (adapter->ras_comps[i].trace_level !=
3141 0xFF ? S_IWUSR : 0),
3142 dir_ent, &adapter->ras_comp_int[i],
3143 &trace_level_ops);
3144 ent = debugfs_create_file("error_level",
3145 S_IRUGO |
3146 (adapter->
3147 ras_comps[i].error_check_level !=
3148 0xFF ? S_IWUSR : 0),
3149 dir_ent, &adapter->ras_comp_int[i],
3150 &trace_level_ops);
3151 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3152 dir_ent, &adapter->ras_comp_int[i],
3153 &tracing_ops);
3154 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3155 dir_ent, &adapter->ras_comp_int[i],
3156 &paused_ops);
3157 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3158 &adapter->ras_comp_int[i],
3159 &trace_ops);
3160 }
3161 }
3162
3163 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3164 struct ibmvnic_adapter *adapter)
3165 {
3166 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3167 struct device *dev = &adapter->vdev->dev;
3168 union ibmvnic_crq newcrq;
3169
3170 adapter->ras_comps = dma_alloc_coherent(dev, len,
3171 &adapter->ras_comps_tok,
3172 GFP_KERNEL);
3173 if (!adapter->ras_comps) {
3174 if (!firmware_has_feature(FW_FEATURE_CMO))
3175 dev_err(dev, "Couldn't alloc fw comps buffer\n");
3176 return;
3177 }
3178
3179 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3180 sizeof(struct ibmvnic_fw_comp_internal),
3181 GFP_KERNEL);
3182 if (!adapter->ras_comp_int)
3183 dma_free_coherent(dev, len, adapter->ras_comps,
3184 adapter->ras_comps_tok);
3185
3186 memset(&newcrq, 0, sizeof(newcrq));
3187 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3188 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3189 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3190 newcrq.request_ras_comps.len = cpu_to_be32(len);
3191 ibmvnic_send_crq(adapter, &newcrq);
3192 }
3193
3194 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3195 {
3196 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3197 struct device *dev = &adapter->vdev->dev;
3198 struct ibmvnic_error_buff *error_buff, *tmp2;
3199 unsigned long flags;
3200 unsigned long flags2;
3201
3202 spin_lock_irqsave(&adapter->inflight_lock, flags);
3203 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3204 switch (inflight_cmd->crq.generic.cmd) {
3205 case LOGIN:
3206 dma_unmap_single(dev, adapter->login_buf_token,
3207 adapter->login_buf_sz,
3208 DMA_BIDIRECTIONAL);
3209 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3210 adapter->login_rsp_buf_sz,
3211 DMA_BIDIRECTIONAL);
3212 kfree(adapter->login_rsp_buf);
3213 kfree(adapter->login_buf);
3214 break;
3215 case REQUEST_DUMP:
3216 complete(&adapter->fw_done);
3217 break;
3218 case REQUEST_ERROR_INFO:
3219 spin_lock_irqsave(&adapter->error_list_lock, flags2);
3220 list_for_each_entry_safe(error_buff, tmp2,
3221 &adapter->errors, list) {
3222 dma_unmap_single(dev, error_buff->dma,
3223 error_buff->len,
3224 DMA_FROM_DEVICE);
3225 kfree(error_buff->buff);
3226 list_del(&error_buff->list);
3227 kfree(error_buff);
3228 }
3229 spin_unlock_irqrestore(&adapter->error_list_lock,
3230 flags2);
3231 break;
3232 }
3233 list_del(&inflight_cmd->list);
3234 kfree(inflight_cmd);
3235 }
3236 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3237 }
3238
3239 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3240 struct ibmvnic_adapter *adapter)
3241 {
3242 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3243 struct net_device *netdev = adapter->netdev;
3244 struct device *dev = &adapter->vdev->dev;
3245 long rc;
3246
3247 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3248 ((unsigned long int *)crq)[0],
3249 ((unsigned long int *)crq)[1]);
3250 switch (gen_crq->first) {
3251 case IBMVNIC_CRQ_INIT_RSP:
3252 switch (gen_crq->cmd) {
3253 case IBMVNIC_CRQ_INIT:
3254 dev_info(dev, "Partner initialized\n");
3255 /* Send back a response */
3256 rc = ibmvnic_send_crq_init_complete(adapter);
3257 if (!rc)
3258 schedule_work(&adapter->vnic_crq_init);
3259 else
3260 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3261 break;
3262 case IBMVNIC_CRQ_INIT_COMPLETE:
3263 dev_info(dev, "Partner initialization complete\n");
3264 send_version_xchg(adapter);
3265 break;
3266 default:
3267 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3268 }
3269 return;
3270 case IBMVNIC_CRQ_XPORT_EVENT:
3271 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3272 dev_info(dev, "Re-enabling adapter\n");
3273 adapter->migrated = true;
3274 ibmvnic_free_inflight(adapter);
3275 release_sub_crqs(adapter);
3276 rc = ibmvnic_reenable_crq_queue(adapter);
3277 if (rc)
3278 dev_err(dev, "Error after enable rc=%ld\n", rc);
3279 adapter->migrated = false;
3280 rc = ibmvnic_send_crq_init(adapter);
3281 if (rc)
3282 dev_err(dev, "Error sending init rc=%ld\n", rc);
3283 } else {
3284 /* The adapter lost the connection */
3285 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3286 gen_crq->cmd);
3287 ibmvnic_free_inflight(adapter);
3288 release_sub_crqs(adapter);
3289 }
3290 return;
3291 case IBMVNIC_CRQ_CMD_RSP:
3292 break;
3293 default:
3294 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3295 gen_crq->first);
3296 return;
3297 }
3298
3299 switch (gen_crq->cmd) {
3300 case VERSION_EXCHANGE_RSP:
3301 rc = crq->version_exchange_rsp.rc.code;
3302 if (rc) {
3303 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3304 break;
3305 }
3306 dev_info(dev, "Partner protocol version is %d\n",
3307 crq->version_exchange_rsp.version);
3308 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3309 ibmvnic_version)
3310 ibmvnic_version =
3311 be16_to_cpu(crq->version_exchange_rsp.version);
3312 send_cap_queries(adapter);
3313 break;
3314 case QUERY_CAPABILITY_RSP:
3315 handle_query_cap_rsp(crq, adapter);
3316 break;
3317 case QUERY_MAP_RSP:
3318 handle_query_map_rsp(crq, adapter);
3319 break;
3320 case REQUEST_MAP_RSP:
3321 handle_request_map_rsp(crq, adapter);
3322 break;
3323 case REQUEST_UNMAP_RSP:
3324 handle_request_unmap_rsp(crq, adapter);
3325 break;
3326 case REQUEST_CAPABILITY_RSP:
3327 handle_request_cap_rsp(crq, adapter);
3328 break;
3329 case LOGIN_RSP:
3330 netdev_dbg(netdev, "Got Login Response\n");
3331 handle_login_rsp(crq, adapter);
3332 break;
3333 case LOGICAL_LINK_STATE_RSP:
3334 netdev_dbg(netdev, "Got Logical Link State Response\n");
3335 adapter->logical_link_state =
3336 crq->logical_link_state_rsp.link_state;
3337 break;
3338 case LINK_STATE_INDICATION:
3339 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3340 adapter->phys_link_state =
3341 crq->link_state_indication.phys_link_state;
3342 adapter->logical_link_state =
3343 crq->link_state_indication.logical_link_state;
3344 break;
3345 case CHANGE_MAC_ADDR_RSP:
3346 netdev_dbg(netdev, "Got MAC address change Response\n");
3347 handle_change_mac_rsp(crq, adapter);
3348 break;
3349 case ERROR_INDICATION:
3350 netdev_dbg(netdev, "Got Error Indication\n");
3351 handle_error_indication(crq, adapter);
3352 break;
3353 case REQUEST_ERROR_RSP:
3354 netdev_dbg(netdev, "Got Error Detail Response\n");
3355 handle_error_info_rsp(crq, adapter);
3356 break;
3357 case REQUEST_STATISTICS_RSP:
3358 netdev_dbg(netdev, "Got Statistics Response\n");
3359 complete(&adapter->stats_done);
3360 break;
3361 case REQUEST_DUMP_SIZE_RSP:
3362 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3363 handle_dump_size_rsp(crq, adapter);
3364 break;
3365 case REQUEST_DUMP_RSP:
3366 netdev_dbg(netdev, "Got Request Dump Response\n");
3367 complete(&adapter->fw_done);
3368 break;
3369 case QUERY_IP_OFFLOAD_RSP:
3370 netdev_dbg(netdev, "Got Query IP offload Response\n");
3371 handle_query_ip_offload_rsp(adapter);
3372 break;
3373 case MULTICAST_CTRL_RSP:
3374 netdev_dbg(netdev, "Got multicast control Response\n");
3375 break;
3376 case CONTROL_IP_OFFLOAD_RSP:
3377 netdev_dbg(netdev, "Got Control IP offload Response\n");
3378 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3379 sizeof(adapter->ip_offload_ctrl),
3380 DMA_TO_DEVICE);
3381 /* We're done with the queries, perform the login */
3382 send_login(adapter);
3383 break;
3384 case REQUEST_RAS_COMP_NUM_RSP:
3385 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3386 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3387 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3388 break;
3389 }
3390 adapter->ras_comp_num =
3391 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3392 handle_request_ras_comp_num_rsp(crq, adapter);
3393 break;
3394 case REQUEST_RAS_COMPS_RSP:
3395 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3396 handle_request_ras_comps_rsp(crq, adapter);
3397 break;
3398 case CONTROL_RAS_RSP:
3399 netdev_dbg(netdev, "Got Control RAS Response\n");
3400 handle_control_ras_rsp(crq, adapter);
3401 break;
3402 case COLLECT_FW_TRACE_RSP:
3403 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3404 complete(&adapter->fw_done);
3405 break;
3406 default:
3407 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3408 gen_crq->cmd);
3409 }
3410 }
3411
3412 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3413 {
3414 struct ibmvnic_adapter *adapter = instance;
3415 struct ibmvnic_crq_queue *queue = &adapter->crq;
3416 struct vio_dev *vdev = adapter->vdev;
3417 union ibmvnic_crq *crq;
3418 unsigned long flags;
3419 bool done = false;
3420
3421 spin_lock_irqsave(&queue->lock, flags);
3422 vio_disable_interrupts(vdev);
3423 while (!done) {
3424 /* Pull all the valid messages off the CRQ */
3425 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3426 ibmvnic_handle_crq(crq, adapter);
3427 crq->generic.first = 0;
3428 }
3429 vio_enable_interrupts(vdev);
3430 crq = ibmvnic_next_crq(adapter);
3431 if (crq) {
3432 vio_disable_interrupts(vdev);
3433 ibmvnic_handle_crq(crq, adapter);
3434 crq->generic.first = 0;
3435 } else {
3436 done = true;
3437 }
3438 }
3439 spin_unlock_irqrestore(&queue->lock, flags);
3440 return IRQ_HANDLED;
3441 }
3442
3443 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3444 {
3445 struct vio_dev *vdev = adapter->vdev;
3446 int rc;
3447
3448 do {
3449 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3450 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3451
3452 if (rc)
3453 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3454
3455 return rc;
3456 }
3457
3458 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3459 {
3460 struct ibmvnic_crq_queue *crq = &adapter->crq;
3461 struct device *dev = &adapter->vdev->dev;
3462 struct vio_dev *vdev = adapter->vdev;
3463 int rc;
3464
3465 /* Close the CRQ */
3466 do {
3467 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3468 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3469
3470 /* Clean out the queue */
3471 memset(crq->msgs, 0, PAGE_SIZE);
3472 crq->cur = 0;
3473
3474 /* And re-open it again */
3475 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3476 crq->msg_token, PAGE_SIZE);
3477
3478 if (rc == H_CLOSED)
3479 /* Adapter is good, but other end is not ready */
3480 dev_warn(dev, "Partner adapter not ready\n");
3481 else if (rc != 0)
3482 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3483
3484 return rc;
3485 }
3486
3487 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3488 {
3489 struct ibmvnic_crq_queue *crq = &adapter->crq;
3490 struct vio_dev *vdev = adapter->vdev;
3491 long rc;
3492
3493 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3494 free_irq(vdev->irq, adapter);
3495 do {
3496 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3497 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3500 DMA_BIDIRECTIONAL);
3501 free_page((unsigned long)crq->msgs);
3502 }
3503
3504 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3505 {
3506 struct ibmvnic_crq_queue *crq = &adapter->crq;
3507 struct device *dev = &adapter->vdev->dev;
3508 struct vio_dev *vdev = adapter->vdev;
3509 int rc, retrc = -ENOMEM;
3510
3511 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3512 /* Should we allocate more than one page? */
3513
3514 if (!crq->msgs)
3515 return -ENOMEM;
3516
3517 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3518 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3519 DMA_BIDIRECTIONAL);
3520 if (dma_mapping_error(dev, crq->msg_token))
3521 goto map_failed;
3522
3523 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3524 crq->msg_token, PAGE_SIZE);
3525
3526 if (rc == H_RESOURCE)
3527 /* maybe kexecing and resource is busy. try a reset */
3528 rc = ibmvnic_reset_crq(adapter);
3529 retrc = rc;
3530
3531 if (rc == H_CLOSED) {
3532 dev_warn(dev, "Partner adapter not ready\n");
3533 } else if (rc) {
3534 dev_warn(dev, "Error %d opening adapter\n", rc);
3535 goto reg_crq_failed;
3536 }
3537
3538 retrc = 0;
3539
3540 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3541 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3542 adapter);
3543 if (rc) {
3544 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3545 vdev->irq, rc);
3546 goto req_irq_failed;
3547 }
3548
3549 rc = vio_enable_interrupts(vdev);
3550 if (rc) {
3551 dev_err(dev, "Error %d enabling interrupts\n", rc);
3552 goto req_irq_failed;
3553 }
3554
3555 crq->cur = 0;
3556 spin_lock_init(&crq->lock);
3557
3558 return retrc;
3559
3560 req_irq_failed:
3561 do {
3562 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3563 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3564 reg_crq_failed:
3565 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3566 map_failed:
3567 free_page((unsigned long)crq->msgs);
3568 return retrc;
3569 }
3570
3571 /* debugfs for dump */
3572 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3573 {
3574 struct net_device *netdev = seq->private;
3575 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3576 struct device *dev = &adapter->vdev->dev;
3577 union ibmvnic_crq crq;
3578
3579 memset(&crq, 0, sizeof(crq));
3580 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3581 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3582 ibmvnic_send_crq(adapter, &crq);
3583
3584 init_completion(&adapter->fw_done);
3585 wait_for_completion(&adapter->fw_done);
3586
3587 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3588
3589 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3590 DMA_BIDIRECTIONAL);
3591
3592 kfree(adapter->dump_data);
3593
3594 return 0;
3595 }
3596
3597 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3598 {
3599 return single_open(file, ibmvnic_dump_show, inode->i_private);
3600 }
3601
3602 static const struct file_operations ibmvnic_dump_ops = {
3603 .owner = THIS_MODULE,
3604 .open = ibmvnic_dump_open,
3605 .read = seq_read,
3606 .llseek = seq_lseek,
3607 .release = single_release,
3608 };
3609
3610 static void handle_crq_init_rsp(struct work_struct *work)
3611 {
3612 struct ibmvnic_adapter *adapter = container_of(work,
3613 struct ibmvnic_adapter,
3614 vnic_crq_init);
3615 struct device *dev = &adapter->vdev->dev;
3616 struct net_device *netdev = adapter->netdev;
3617 unsigned long timeout = msecs_to_jiffies(30000);
3618 int rc;
3619
3620 send_version_xchg(adapter);
3621 reinit_completion(&adapter->init_done);
3622 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3623 dev_err(dev, "Passive init timeout\n");
3624 goto task_failed;
3625 }
3626
3627 do {
3628 if (adapter->renegotiate) {
3629 adapter->renegotiate = false;
3630 release_sub_crqs_no_irqs(adapter);
3631 send_cap_queries(adapter);
3632
3633 reinit_completion(&adapter->init_done);
3634 if (!wait_for_completion_timeout(&adapter->init_done,
3635 timeout)) {
3636 dev_err(dev, "Passive init timeout\n");
3637 goto task_failed;
3638 }
3639 }
3640 } while (adapter->renegotiate);
3641 rc = init_sub_crq_irqs(adapter);
3642
3643 if (rc)
3644 goto task_failed;
3645
3646 netdev->real_num_tx_queues = adapter->req_tx_queues;
3647
3648 rc = register_netdev(netdev);
3649 if (rc) {
3650 dev_err(dev,
3651 "failed to register netdev rc=%d\n", rc);
3652 goto register_failed;
3653 }
3654 dev_info(dev, "ibmvnic registered\n");
3655
3656 return;
3657
3658 register_failed:
3659 release_sub_crqs(adapter);
3660 task_failed:
3661 dev_err(dev, "Passive initialization was not successful\n");
3662 }
3663
3664 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3665 {
3666 unsigned long timeout = msecs_to_jiffies(30000);
3667 struct ibmvnic_adapter *adapter;
3668 struct net_device *netdev;
3669 unsigned char *mac_addr_p;
3670 struct dentry *ent;
3671 char buf[16]; /* debugfs name buf */
3672 int rc;
3673
3674 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3675 dev->unit_address);
3676
3677 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3678 VETH_MAC_ADDR, NULL);
3679 if (!mac_addr_p) {
3680 dev_err(&dev->dev,
3681 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3682 __FILE__, __LINE__);
3683 return 0;
3684 }
3685
3686 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3687 IBMVNIC_MAX_TX_QUEUES);
3688 if (!netdev)
3689 return -ENOMEM;
3690
3691 adapter = netdev_priv(netdev);
3692 dev_set_drvdata(&dev->dev, netdev);
3693 adapter->vdev = dev;
3694 adapter->netdev = netdev;
3695
3696 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3697 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3698 netdev->irq = dev->irq;
3699 netdev->netdev_ops = &ibmvnic_netdev_ops;
3700 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3701 SET_NETDEV_DEV(netdev, &dev->dev);
3702
3703 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3704
3705 spin_lock_init(&adapter->stats_lock);
3706
3707 rc = ibmvnic_init_crq_queue(adapter);
3708 if (rc) {
3709 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3710 goto free_netdev;
3711 }
3712
3713 INIT_LIST_HEAD(&adapter->errors);
3714 INIT_LIST_HEAD(&adapter->inflight);
3715 spin_lock_init(&adapter->error_list_lock);
3716 spin_lock_init(&adapter->inflight_lock);
3717
3718 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3719 sizeof(struct ibmvnic_statistics),
3720 DMA_FROM_DEVICE);
3721 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3722 if (!firmware_has_feature(FW_FEATURE_CMO))
3723 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3724 goto free_crq;
3725 }
3726
3727 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3728 ent = debugfs_create_dir(buf, NULL);
3729 if (!ent || IS_ERR(ent)) {
3730 dev_info(&dev->dev, "debugfs create directory failed\n");
3731 adapter->debugfs_dir = NULL;
3732 } else {
3733 adapter->debugfs_dir = ent;
3734 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3735 netdev, &ibmvnic_dump_ops);
3736 if (!ent || IS_ERR(ent)) {
3737 dev_info(&dev->dev,
3738 "debugfs create dump file failed\n");
3739 adapter->debugfs_dump = NULL;
3740 } else {
3741 adapter->debugfs_dump = ent;
3742 }
3743 }
3744 ibmvnic_send_crq_init(adapter);
3745
3746 init_completion(&adapter->init_done);
3747 if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3748 return 0;
3749
3750 do {
3751 if (adapter->renegotiate) {
3752 adapter->renegotiate = false;
3753 release_sub_crqs_no_irqs(adapter);
3754 send_cap_queries(adapter);
3755
3756 reinit_completion(&adapter->init_done);
3757 if (!wait_for_completion_timeout(&adapter->init_done,
3758 timeout))
3759 return 0;
3760 }
3761 } while (adapter->renegotiate);
3762
3763 rc = init_sub_crq_irqs(adapter);
3764 if (rc) {
3765 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3766 goto free_debugfs;
3767 }
3768
3769 netdev->real_num_tx_queues = adapter->req_tx_queues;
3770
3771 rc = register_netdev(netdev);
3772 if (rc) {
3773 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3774 goto free_sub_crqs;
3775 }
3776 dev_info(&dev->dev, "ibmvnic registered\n");
3777
3778 return 0;
3779
3780 free_sub_crqs:
3781 release_sub_crqs(adapter);
3782 free_debugfs:
3783 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3784 debugfs_remove_recursive(adapter->debugfs_dir);
3785 free_crq:
3786 ibmvnic_release_crq_queue(adapter);
3787 free_netdev:
3788 free_netdev(netdev);
3789 return rc;
3790 }
3791
3792 static int ibmvnic_remove(struct vio_dev *dev)
3793 {
3794 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3795 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3796
3797 unregister_netdev(netdev);
3798
3799 release_sub_crqs(adapter);
3800
3801 ibmvnic_release_crq_queue(adapter);
3802
3803 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3804 debugfs_remove_recursive(adapter->debugfs_dir);
3805
3806 if (adapter->ras_comps)
3807 dma_free_coherent(&dev->dev,
3808 adapter->ras_comp_num *
3809 sizeof(struct ibmvnic_fw_component),
3810 adapter->ras_comps, adapter->ras_comps_tok);
3811
3812 kfree(adapter->ras_comp_int);
3813
3814 free_netdev(netdev);
3815 dev_set_drvdata(&dev->dev, NULL);
3816
3817 return 0;
3818 }
3819
3820 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3821 {
3822 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3823 struct ibmvnic_adapter *adapter;
3824 struct iommu_table *tbl;
3825 unsigned long ret = 0;
3826 int i;
3827
3828 tbl = get_iommu_table_base(&vdev->dev);
3829
3830 /* netdev inits at probe time along with the structures we need below*/
3831 if (!netdev)
3832 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3833
3834 adapter = netdev_priv(netdev);
3835
3836 ret += PAGE_SIZE; /* the crq message queue */
3837 ret += adapter->bounce_buffer_size;
3838 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3839
3840 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3841 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3842
3843 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3844 i++)
3845 ret += adapter->rx_pool[i].size *
3846 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3847
3848 return ret;
3849 }
3850
3851 static int ibmvnic_resume(struct device *dev)
3852 {
3853 struct net_device *netdev = dev_get_drvdata(dev);
3854 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3855 int i;
3856
3857 /* kick the interrupt handlers just in case we lost an interrupt */
3858 for (i = 0; i < adapter->req_rx_queues; i++)
3859 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3860 adapter->rx_scrq[i]);
3861
3862 return 0;
3863 }
3864
3865 static struct vio_device_id ibmvnic_device_table[] = {
3866 {"network", "IBM,vnic"},
3867 {"", "" }
3868 };
3869 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3870
3871 static const struct dev_pm_ops ibmvnic_pm_ops = {
3872 .resume = ibmvnic_resume
3873 };
3874
3875 static struct vio_driver ibmvnic_driver = {
3876 .id_table = ibmvnic_device_table,
3877 .probe = ibmvnic_probe,
3878 .remove = ibmvnic_remove,
3879 .get_desired_dma = ibmvnic_get_desired_dma,
3880 .name = ibmvnic_driver_name,
3881 .pm = &ibmvnic_pm_ops,
3882 };
3883
3884 /* module functions */
3885 static int __init ibmvnic_module_init(void)
3886 {
3887 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3888 IBMVNIC_DRIVER_VERSION);
3889
3890 return vio_register_driver(&ibmvnic_driver);
3891 }
3892
3893 static void __exit ibmvnic_module_exit(void)
3894 {
3895 vio_unregister_driver(&ibmvnic_driver);
3896 }
3897
3898 module_init(ibmvnic_module_init);
3899 module_exit(ibmvnic_module_exit);
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