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