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Merge remote-tracking branch 'selinux/next'
[deliverable/linux.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 #include <linux/workqueue.h>
79
80 #include "ibmvnic.h"
81
82 static const char ibmvnic_driver_name[] = "ibmvnic";
83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84
85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89
90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
91 static int ibmvnic_remove(struct vio_dev *);
92 static void release_sub_crqs(struct ibmvnic_adapter *);
93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
114
115 struct ibmvnic_stat {
116 char name[ETH_GSTRING_LEN];
117 int offset;
118 };
119
120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
121 offsetof(struct ibmvnic_statistics, stat))
122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
123
124 static const struct ibmvnic_stat ibmvnic_stats[] = {
125 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
126 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
127 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
128 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
129 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
130 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
131 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
132 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
133 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
134 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
135 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
136 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
137 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
138 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
139 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
140 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
141 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
142 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
143 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
144 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
145 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
146 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
147 };
148
149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
150 unsigned long length, unsigned long *number,
151 unsigned long *irq)
152 {
153 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
154 long rc;
155
156 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
157 *number = retbuf[0];
158 *irq = retbuf[1];
159
160 return rc;
161 }
162
163 /* net_device_ops functions */
164
165 static void init_rx_pool(struct ibmvnic_adapter *adapter,
166 struct ibmvnic_rx_pool *rx_pool, int num, int index,
167 int buff_size, int active)
168 {
169 netdev_dbg(adapter->netdev,
170 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
171 index, num, buff_size);
172 rx_pool->size = num;
173 rx_pool->index = index;
174 rx_pool->buff_size = buff_size;
175 rx_pool->active = active;
176 }
177
178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
179 struct ibmvnic_long_term_buff *ltb, int size)
180 {
181 struct device *dev = &adapter->vdev->dev;
182
183 ltb->size = size;
184 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
185 GFP_KERNEL);
186
187 if (!ltb->buff) {
188 dev_err(dev, "Couldn't alloc long term buffer\n");
189 return -ENOMEM;
190 }
191 ltb->map_id = adapter->map_id;
192 adapter->map_id++;
193 send_request_map(adapter, ltb->addr,
194 ltb->size, ltb->map_id);
195 init_completion(&adapter->fw_done);
196 wait_for_completion(&adapter->fw_done);
197 return 0;
198 }
199
200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
201 struct ibmvnic_long_term_buff *ltb)
202 {
203 struct device *dev = &adapter->vdev->dev;
204
205 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
206 if (!adapter->failover)
207 send_request_unmap(adapter, ltb->map_id);
208 }
209
210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_rx_pool *pool)
212 {
213 struct device *dev = &adapter->vdev->dev;
214 int i;
215
216 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
217 if (!pool->free_map)
218 return -ENOMEM;
219
220 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
221 GFP_KERNEL);
222
223 if (!pool->rx_buff) {
224 dev_err(dev, "Couldn't alloc rx buffers\n");
225 kfree(pool->free_map);
226 return -ENOMEM;
227 }
228
229 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
230 pool->size * pool->buff_size)) {
231 kfree(pool->free_map);
232 kfree(pool->rx_buff);
233 return -ENOMEM;
234 }
235
236 for (i = 0; i < pool->size; ++i)
237 pool->free_map[i] = i;
238
239 atomic_set(&pool->available, 0);
240 pool->next_alloc = 0;
241 pool->next_free = 0;
242
243 return 0;
244 }
245
246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
247 struct ibmvnic_rx_pool *pool)
248 {
249 int count = pool->size - atomic_read(&pool->available);
250 struct device *dev = &adapter->vdev->dev;
251 int buffers_added = 0;
252 unsigned long lpar_rc;
253 union sub_crq sub_crq;
254 struct sk_buff *skb;
255 unsigned int offset;
256 dma_addr_t dma_addr;
257 unsigned char *dst;
258 u64 *handle_array;
259 int shift = 0;
260 int index;
261 int i;
262
263 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
264 be32_to_cpu(adapter->login_rsp_buf->
265 off_rxadd_subcrqs));
266
267 for (i = 0; i < count; ++i) {
268 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
269 if (!skb) {
270 dev_err(dev, "Couldn't replenish rx buff\n");
271 adapter->replenish_no_mem++;
272 break;
273 }
274
275 index = pool->free_map[pool->next_free];
276
277 if (pool->rx_buff[index].skb)
278 dev_err(dev, "Inconsistent free_map!\n");
279
280 /* Copy the skb to the long term mapped DMA buffer */
281 offset = index * pool->buff_size;
282 dst = pool->long_term_buff.buff + offset;
283 memset(dst, 0, pool->buff_size);
284 dma_addr = pool->long_term_buff.addr + offset;
285 pool->rx_buff[index].data = dst;
286
287 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
288 pool->rx_buff[index].dma = dma_addr;
289 pool->rx_buff[index].skb = skb;
290 pool->rx_buff[index].pool_index = pool->index;
291 pool->rx_buff[index].size = pool->buff_size;
292
293 memset(&sub_crq, 0, sizeof(sub_crq));
294 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
295 sub_crq.rx_add.correlator =
296 cpu_to_be64((u64)&pool->rx_buff[index]);
297 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
298 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
299
300 /* The length field of the sCRQ is defined to be 24 bits so the
301 * buffer size needs to be left shifted by a byte before it is
302 * converted to big endian to prevent the last byte from being
303 * truncated.
304 */
305 #ifdef __LITTLE_ENDIAN__
306 shift = 8;
307 #endif
308 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
309
310 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
311 &sub_crq);
312 if (lpar_rc != H_SUCCESS)
313 goto failure;
314
315 buffers_added++;
316 adapter->replenish_add_buff_success++;
317 pool->next_free = (pool->next_free + 1) % pool->size;
318 }
319 atomic_add(buffers_added, &pool->available);
320 return;
321
322 failure:
323 dev_info(dev, "replenish pools failure\n");
324 pool->free_map[pool->next_free] = index;
325 pool->rx_buff[index].skb = NULL;
326 if (!dma_mapping_error(dev, dma_addr))
327 dma_unmap_single(dev, dma_addr, pool->buff_size,
328 DMA_FROM_DEVICE);
329
330 dev_kfree_skb_any(skb);
331 adapter->replenish_add_buff_failure++;
332 atomic_add(buffers_added, &pool->available);
333 }
334
335 static void replenish_pools(struct ibmvnic_adapter *adapter)
336 {
337 int i;
338
339 if (adapter->migrated)
340 return;
341
342 adapter->replenish_task_cycles++;
343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 i++) {
345 if (adapter->rx_pool[i].active)
346 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
347 }
348 }
349
350 static void free_rx_pool(struct ibmvnic_adapter *adapter,
351 struct ibmvnic_rx_pool *pool)
352 {
353 int i;
354
355 kfree(pool->free_map);
356 pool->free_map = NULL;
357
358 if (!pool->rx_buff)
359 return;
360
361 for (i = 0; i < pool->size; i++) {
362 if (pool->rx_buff[i].skb) {
363 dev_kfree_skb_any(pool->rx_buff[i].skb);
364 pool->rx_buff[i].skb = NULL;
365 }
366 }
367 kfree(pool->rx_buff);
368 pool->rx_buff = NULL;
369 }
370
371 static int ibmvnic_open(struct net_device *netdev)
372 {
373 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
374 struct device *dev = &adapter->vdev->dev;
375 struct ibmvnic_tx_pool *tx_pool;
376 union ibmvnic_crq crq;
377 int rxadd_subcrqs;
378 u64 *size_array;
379 int tx_subcrqs;
380 int i, j;
381
382 rxadd_subcrqs =
383 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
384 tx_subcrqs =
385 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
386 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
387 be32_to_cpu(adapter->login_rsp_buf->
388 off_rxadd_buff_size));
389 adapter->map_id = 1;
390 adapter->napi = kcalloc(adapter->req_rx_queues,
391 sizeof(struct napi_struct), GFP_KERNEL);
392 if (!adapter->napi)
393 goto alloc_napi_failed;
394 for (i = 0; i < adapter->req_rx_queues; i++) {
395 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
396 NAPI_POLL_WEIGHT);
397 napi_enable(&adapter->napi[i]);
398 }
399 adapter->rx_pool =
400 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
401
402 if (!adapter->rx_pool)
403 goto rx_pool_arr_alloc_failed;
404 send_map_query(adapter);
405 for (i = 0; i < rxadd_subcrqs; i++) {
406 init_rx_pool(adapter, &adapter->rx_pool[i],
407 IBMVNIC_BUFFS_PER_POOL, i,
408 be64_to_cpu(size_array[i]), 1);
409 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
410 dev_err(dev, "Couldn't alloc rx pool\n");
411 goto rx_pool_alloc_failed;
412 }
413 }
414 adapter->tx_pool =
415 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
416
417 if (!adapter->tx_pool)
418 goto tx_pool_arr_alloc_failed;
419 for (i = 0; i < tx_subcrqs; i++) {
420 tx_pool = &adapter->tx_pool[i];
421 tx_pool->tx_buff =
422 kcalloc(adapter->max_tx_entries_per_subcrq,
423 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
424 if (!tx_pool->tx_buff)
425 goto tx_pool_alloc_failed;
426
427 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
428 adapter->max_tx_entries_per_subcrq *
429 adapter->req_mtu))
430 goto tx_ltb_alloc_failed;
431
432 tx_pool->free_map =
433 kcalloc(adapter->max_tx_entries_per_subcrq,
434 sizeof(int), GFP_KERNEL);
435 if (!tx_pool->free_map)
436 goto tx_fm_alloc_failed;
437
438 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
439 tx_pool->free_map[j] = j;
440
441 tx_pool->consumer_index = 0;
442 tx_pool->producer_index = 0;
443 }
444 adapter->bounce_buffer_size =
445 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
446 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
447 GFP_KERNEL);
448 if (!adapter->bounce_buffer)
449 goto bounce_alloc_failed;
450
451 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
452 adapter->bounce_buffer_size,
453 DMA_TO_DEVICE);
454 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
455 dev_err(dev, "Couldn't map tx bounce buffer\n");
456 goto bounce_map_failed;
457 }
458 replenish_pools(adapter);
459
460 /* We're ready to receive frames, enable the sub-crq interrupts and
461 * set the logical link state to up
462 */
463 for (i = 0; i < adapter->req_rx_queues; i++)
464 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
465
466 for (i = 0; i < adapter->req_tx_queues; i++)
467 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
468
469 memset(&crq, 0, sizeof(crq));
470 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
471 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
472 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
473 ibmvnic_send_crq(adapter, &crq);
474
475 netif_tx_start_all_queues(netdev);
476
477 return 0;
478
479 bounce_map_failed:
480 kfree(adapter->bounce_buffer);
481 bounce_alloc_failed:
482 i = tx_subcrqs - 1;
483 kfree(adapter->tx_pool[i].free_map);
484 tx_fm_alloc_failed:
485 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
486 tx_ltb_alloc_failed:
487 kfree(adapter->tx_pool[i].tx_buff);
488 tx_pool_alloc_failed:
489 for (j = 0; j < i; j++) {
490 kfree(adapter->tx_pool[j].tx_buff);
491 free_long_term_buff(adapter,
492 &adapter->tx_pool[j].long_term_buff);
493 kfree(adapter->tx_pool[j].free_map);
494 }
495 kfree(adapter->tx_pool);
496 adapter->tx_pool = NULL;
497 tx_pool_arr_alloc_failed:
498 i = rxadd_subcrqs;
499 rx_pool_alloc_failed:
500 for (j = 0; j < i; j++) {
501 free_rx_pool(adapter, &adapter->rx_pool[j]);
502 free_long_term_buff(adapter,
503 &adapter->rx_pool[j].long_term_buff);
504 }
505 kfree(adapter->rx_pool);
506 adapter->rx_pool = NULL;
507 rx_pool_arr_alloc_failed:
508 for (i = 0; i < adapter->req_rx_queues; i++)
509 napi_enable(&adapter->napi[i]);
510 alloc_napi_failed:
511 return -ENOMEM;
512 }
513
514 static int ibmvnic_close(struct net_device *netdev)
515 {
516 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
517 struct device *dev = &adapter->vdev->dev;
518 union ibmvnic_crq crq;
519 int i;
520
521 adapter->closing = true;
522
523 for (i = 0; i < adapter->req_rx_queues; i++)
524 napi_disable(&adapter->napi[i]);
525
526 if (!adapter->failover)
527 netif_tx_stop_all_queues(netdev);
528
529 if (adapter->bounce_buffer) {
530 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
531 dma_unmap_single(&adapter->vdev->dev,
532 adapter->bounce_buffer_dma,
533 adapter->bounce_buffer_size,
534 DMA_BIDIRECTIONAL);
535 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
536 }
537 kfree(adapter->bounce_buffer);
538 adapter->bounce_buffer = NULL;
539 }
540
541 memset(&crq, 0, sizeof(crq));
542 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
543 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
544 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
545 ibmvnic_send_crq(adapter, &crq);
546
547 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
548 i++) {
549 kfree(adapter->tx_pool[i].tx_buff);
550 free_long_term_buff(adapter,
551 &adapter->tx_pool[i].long_term_buff);
552 kfree(adapter->tx_pool[i].free_map);
553 }
554 kfree(adapter->tx_pool);
555 adapter->tx_pool = NULL;
556
557 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
558 i++) {
559 free_rx_pool(adapter, &adapter->rx_pool[i]);
560 free_long_term_buff(adapter,
561 &adapter->rx_pool[i].long_term_buff);
562 }
563 kfree(adapter->rx_pool);
564 adapter->rx_pool = NULL;
565
566 adapter->closing = false;
567
568 return 0;
569 }
570
571 /**
572 * build_hdr_data - creates L2/L3/L4 header data buffer
573 * @hdr_field - bitfield determining needed headers
574 * @skb - socket buffer
575 * @hdr_len - array of header lengths
576 * @tot_len - total length of data
577 *
578 * Reads hdr_field to determine which headers are needed by firmware.
579 * Builds a buffer containing these headers. Saves individual header
580 * lengths and total buffer length to be used to build descriptors.
581 */
582 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
583 int *hdr_len, u8 *hdr_data)
584 {
585 int len = 0;
586 u8 *hdr;
587
588 hdr_len[0] = sizeof(struct ethhdr);
589
590 if (skb->protocol == htons(ETH_P_IP)) {
591 hdr_len[1] = ip_hdr(skb)->ihl * 4;
592 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
593 hdr_len[2] = tcp_hdrlen(skb);
594 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
595 hdr_len[2] = sizeof(struct udphdr);
596 } else if (skb->protocol == htons(ETH_P_IPV6)) {
597 hdr_len[1] = sizeof(struct ipv6hdr);
598 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
599 hdr_len[2] = tcp_hdrlen(skb);
600 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
601 hdr_len[2] = sizeof(struct udphdr);
602 }
603
604 memset(hdr_data, 0, 120);
605 if ((hdr_field >> 6) & 1) {
606 hdr = skb_mac_header(skb);
607 memcpy(hdr_data, hdr, hdr_len[0]);
608 len += hdr_len[0];
609 }
610
611 if ((hdr_field >> 5) & 1) {
612 hdr = skb_network_header(skb);
613 memcpy(hdr_data + len, hdr, hdr_len[1]);
614 len += hdr_len[1];
615 }
616
617 if ((hdr_field >> 4) & 1) {
618 hdr = skb_transport_header(skb);
619 memcpy(hdr_data + len, hdr, hdr_len[2]);
620 len += hdr_len[2];
621 }
622 return len;
623 }
624
625 /**
626 * create_hdr_descs - create header and header extension descriptors
627 * @hdr_field - bitfield determining needed headers
628 * @data - buffer containing header data
629 * @len - length of data buffer
630 * @hdr_len - array of individual header lengths
631 * @scrq_arr - descriptor array
632 *
633 * Creates header and, if needed, header extension descriptors and
634 * places them in a descriptor array, scrq_arr
635 */
636
637 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
638 union sub_crq *scrq_arr)
639 {
640 union sub_crq hdr_desc;
641 int tmp_len = len;
642 u8 *data, *cur;
643 int tmp;
644
645 while (tmp_len > 0) {
646 cur = hdr_data + len - tmp_len;
647
648 memset(&hdr_desc, 0, sizeof(hdr_desc));
649 if (cur != hdr_data) {
650 data = hdr_desc.hdr_ext.data;
651 tmp = tmp_len > 29 ? 29 : tmp_len;
652 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
653 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
654 hdr_desc.hdr_ext.len = tmp;
655 } else {
656 data = hdr_desc.hdr.data;
657 tmp = tmp_len > 24 ? 24 : tmp_len;
658 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
659 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
660 hdr_desc.hdr.len = tmp;
661 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
662 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
663 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
664 hdr_desc.hdr.flag = hdr_field << 1;
665 }
666 memcpy(data, cur, tmp);
667 tmp_len -= tmp;
668 *scrq_arr = hdr_desc;
669 scrq_arr++;
670 }
671 }
672
673 /**
674 * build_hdr_descs_arr - build a header descriptor array
675 * @skb - socket buffer
676 * @num_entries - number of descriptors to be sent
677 * @subcrq - first TX descriptor
678 * @hdr_field - bit field determining which headers will be sent
679 *
680 * This function will build a TX descriptor array with applicable
681 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
682 */
683
684 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
685 int *num_entries, u8 hdr_field)
686 {
687 int hdr_len[3] = {0, 0, 0};
688 int tot_len, len;
689 u8 *hdr_data = txbuff->hdr_data;
690
691 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
692 txbuff->hdr_data);
693 len = tot_len;
694 len -= 24;
695 if (len > 0)
696 num_entries += len % 29 ? len / 29 + 1 : len / 29;
697 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
698 txbuff->indir_arr + 1);
699 }
700
701 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
702 {
703 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
704 int queue_num = skb_get_queue_mapping(skb);
705 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
706 struct device *dev = &adapter->vdev->dev;
707 struct ibmvnic_tx_buff *tx_buff = NULL;
708 struct ibmvnic_tx_pool *tx_pool;
709 unsigned int tx_send_failed = 0;
710 unsigned int tx_map_failed = 0;
711 unsigned int tx_dropped = 0;
712 unsigned int tx_packets = 0;
713 unsigned int tx_bytes = 0;
714 dma_addr_t data_dma_addr;
715 struct netdev_queue *txq;
716 bool used_bounce = false;
717 unsigned long lpar_rc;
718 union sub_crq tx_crq;
719 unsigned int offset;
720 int num_entries = 1;
721 unsigned char *dst;
722 u64 *handle_array;
723 int index = 0;
724 int ret = 0;
725
726 tx_pool = &adapter->tx_pool[queue_num];
727 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
728 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
729 be32_to_cpu(adapter->login_rsp_buf->
730 off_txsubm_subcrqs));
731 if (adapter->migrated) {
732 tx_send_failed++;
733 tx_dropped++;
734 ret = NETDEV_TX_BUSY;
735 goto out;
736 }
737
738 index = tx_pool->free_map[tx_pool->consumer_index];
739 offset = index * adapter->req_mtu;
740 dst = tx_pool->long_term_buff.buff + offset;
741 memset(dst, 0, adapter->req_mtu);
742 skb_copy_from_linear_data(skb, dst, skb->len);
743 data_dma_addr = tx_pool->long_term_buff.addr + offset;
744
745 tx_pool->consumer_index =
746 (tx_pool->consumer_index + 1) %
747 adapter->max_tx_entries_per_subcrq;
748
749 tx_buff = &tx_pool->tx_buff[index];
750 tx_buff->skb = skb;
751 tx_buff->data_dma[0] = data_dma_addr;
752 tx_buff->data_len[0] = skb->len;
753 tx_buff->index = index;
754 tx_buff->pool_index = queue_num;
755 tx_buff->last_frag = true;
756 tx_buff->used_bounce = used_bounce;
757
758 memset(&tx_crq, 0, sizeof(tx_crq));
759 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
760 tx_crq.v1.type = IBMVNIC_TX_DESC;
761 tx_crq.v1.n_crq_elem = 1;
762 tx_crq.v1.n_sge = 1;
763 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
764 tx_crq.v1.correlator = cpu_to_be32(index);
765 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
766 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
767 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
768
769 if (adapter->vlan_header_insertion) {
770 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
771 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
772 }
773
774 if (skb->protocol == htons(ETH_P_IP)) {
775 if (ip_hdr(skb)->version == 4)
776 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
777 else if (ip_hdr(skb)->version == 6)
778 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
779
780 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
781 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
782 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
783 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
784 }
785
786 if (skb->ip_summed == CHECKSUM_PARTIAL) {
787 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
788 hdrs += 2;
789 }
790 /* determine if l2/3/4 headers are sent to firmware */
791 if ((*hdrs >> 7) & 1 &&
792 (skb->protocol == htons(ETH_P_IP) ||
793 skb->protocol == htons(ETH_P_IPV6))) {
794 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
795 tx_crq.v1.n_crq_elem = num_entries;
796 tx_buff->indir_arr[0] = tx_crq;
797 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
798 sizeof(tx_buff->indir_arr),
799 DMA_TO_DEVICE);
800 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
801 if (!firmware_has_feature(FW_FEATURE_CMO))
802 dev_err(dev, "tx: unable to map descriptor array\n");
803 tx_map_failed++;
804 tx_dropped++;
805 ret = NETDEV_TX_BUSY;
806 goto out;
807 }
808 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
809 (u64)tx_buff->indir_dma,
810 (u64)num_entries);
811 } else {
812 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
813 &tx_crq);
814 }
815 if (lpar_rc != H_SUCCESS) {
816 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
817
818 if (tx_pool->consumer_index == 0)
819 tx_pool->consumer_index =
820 adapter->max_tx_entries_per_subcrq - 1;
821 else
822 tx_pool->consumer_index--;
823
824 tx_send_failed++;
825 tx_dropped++;
826 ret = NETDEV_TX_BUSY;
827 goto out;
828 }
829 tx_packets++;
830 tx_bytes += skb->len;
831 txq->trans_start = jiffies;
832 ret = NETDEV_TX_OK;
833
834 out:
835 netdev->stats.tx_dropped += tx_dropped;
836 netdev->stats.tx_bytes += tx_bytes;
837 netdev->stats.tx_packets += tx_packets;
838 adapter->tx_send_failed += tx_send_failed;
839 adapter->tx_map_failed += tx_map_failed;
840
841 return ret;
842 }
843
844 static void ibmvnic_set_multi(struct net_device *netdev)
845 {
846 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
847 struct netdev_hw_addr *ha;
848 union ibmvnic_crq crq;
849
850 memset(&crq, 0, sizeof(crq));
851 crq.request_capability.first = IBMVNIC_CRQ_CMD;
852 crq.request_capability.cmd = REQUEST_CAPABILITY;
853
854 if (netdev->flags & IFF_PROMISC) {
855 if (!adapter->promisc_supported)
856 return;
857 } else {
858 if (netdev->flags & IFF_ALLMULTI) {
859 /* Accept all multicast */
860 memset(&crq, 0, sizeof(crq));
861 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
862 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
863 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
864 ibmvnic_send_crq(adapter, &crq);
865 } else if (netdev_mc_empty(netdev)) {
866 /* Reject all multicast */
867 memset(&crq, 0, sizeof(crq));
868 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
869 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
870 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
871 ibmvnic_send_crq(adapter, &crq);
872 } else {
873 /* Accept one or more multicast(s) */
874 netdev_for_each_mc_addr(ha, netdev) {
875 memset(&crq, 0, sizeof(crq));
876 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
877 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
878 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
879 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
880 ha->addr);
881 ibmvnic_send_crq(adapter, &crq);
882 }
883 }
884 }
885 }
886
887 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
888 {
889 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
890 struct sockaddr *addr = p;
891 union ibmvnic_crq crq;
892
893 if (!is_valid_ether_addr(addr->sa_data))
894 return -EADDRNOTAVAIL;
895
896 memset(&crq, 0, sizeof(crq));
897 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
898 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
899 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
900 ibmvnic_send_crq(adapter, &crq);
901 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
902 return 0;
903 }
904
905 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
906 {
907 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
908
909 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
910 return -EINVAL;
911
912 netdev->mtu = new_mtu;
913 return 0;
914 }
915
916 static void ibmvnic_tx_timeout(struct net_device *dev)
917 {
918 struct ibmvnic_adapter *adapter = netdev_priv(dev);
919 int rc;
920
921 /* Adapter timed out, resetting it */
922 release_sub_crqs(adapter);
923 rc = ibmvnic_reset_crq(adapter);
924 if (rc)
925 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
926 else
927 ibmvnic_send_crq_init(adapter);
928 }
929
930 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
931 struct ibmvnic_rx_buff *rx_buff)
932 {
933 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
934
935 rx_buff->skb = NULL;
936
937 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
938 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
939
940 atomic_dec(&pool->available);
941 }
942
943 static int ibmvnic_poll(struct napi_struct *napi, int budget)
944 {
945 struct net_device *netdev = napi->dev;
946 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
947 int scrq_num = (int)(napi - adapter->napi);
948 int frames_processed = 0;
949 restart_poll:
950 while (frames_processed < budget) {
951 struct sk_buff *skb;
952 struct ibmvnic_rx_buff *rx_buff;
953 union sub_crq *next;
954 u32 length;
955 u16 offset;
956 u8 flags = 0;
957
958 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
959 break;
960 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
961 rx_buff =
962 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
963 rx_comp.correlator);
964 /* do error checking */
965 if (next->rx_comp.rc) {
966 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
967 /* free the entry */
968 next->rx_comp.first = 0;
969 remove_buff_from_pool(adapter, rx_buff);
970 break;
971 }
972
973 length = be32_to_cpu(next->rx_comp.len);
974 offset = be16_to_cpu(next->rx_comp.off_frame_data);
975 flags = next->rx_comp.flags;
976 skb = rx_buff->skb;
977 skb_copy_to_linear_data(skb, rx_buff->data + offset,
978 length);
979 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
980 /* free the entry */
981 next->rx_comp.first = 0;
982 remove_buff_from_pool(adapter, rx_buff);
983
984 skb_put(skb, length);
985 skb->protocol = eth_type_trans(skb, netdev);
986
987 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
988 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
989 skb->ip_summed = CHECKSUM_UNNECESSARY;
990 }
991
992 length = skb->len;
993 napi_gro_receive(napi, skb); /* send it up */
994 netdev->stats.rx_packets++;
995 netdev->stats.rx_bytes += length;
996 frames_processed++;
997 }
998 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
999
1000 if (frames_processed < budget) {
1001 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1002 napi_complete(napi);
1003 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1004 napi_reschedule(napi)) {
1005 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1006 goto restart_poll;
1007 }
1008 }
1009 return frames_processed;
1010 }
1011
1012 #ifdef CONFIG_NET_POLL_CONTROLLER
1013 static void ibmvnic_netpoll_controller(struct net_device *dev)
1014 {
1015 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1016 int i;
1017
1018 replenish_pools(netdev_priv(dev));
1019 for (i = 0; i < adapter->req_rx_queues; i++)
1020 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1021 adapter->rx_scrq[i]);
1022 }
1023 #endif
1024
1025 static const struct net_device_ops ibmvnic_netdev_ops = {
1026 .ndo_open = ibmvnic_open,
1027 .ndo_stop = ibmvnic_close,
1028 .ndo_start_xmit = ibmvnic_xmit,
1029 .ndo_set_rx_mode = ibmvnic_set_multi,
1030 .ndo_set_mac_address = ibmvnic_set_mac,
1031 .ndo_validate_addr = eth_validate_addr,
1032 .ndo_change_mtu = ibmvnic_change_mtu,
1033 .ndo_tx_timeout = ibmvnic_tx_timeout,
1034 #ifdef CONFIG_NET_POLL_CONTROLLER
1035 .ndo_poll_controller = ibmvnic_netpoll_controller,
1036 #endif
1037 };
1038
1039 /* ethtool functions */
1040
1041 static int ibmvnic_get_settings(struct net_device *netdev,
1042 struct ethtool_cmd *cmd)
1043 {
1044 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1045 SUPPORTED_FIBRE);
1046 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1047 ADVERTISED_FIBRE);
1048 ethtool_cmd_speed_set(cmd, SPEED_1000);
1049 cmd->duplex = DUPLEX_FULL;
1050 cmd->port = PORT_FIBRE;
1051 cmd->phy_address = 0;
1052 cmd->transceiver = XCVR_INTERNAL;
1053 cmd->autoneg = AUTONEG_ENABLE;
1054 cmd->maxtxpkt = 0;
1055 cmd->maxrxpkt = 1;
1056 return 0;
1057 }
1058
1059 static void ibmvnic_get_drvinfo(struct net_device *dev,
1060 struct ethtool_drvinfo *info)
1061 {
1062 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1063 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1064 }
1065
1066 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1067 {
1068 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1069
1070 return adapter->msg_enable;
1071 }
1072
1073 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1074 {
1075 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1076
1077 adapter->msg_enable = data;
1078 }
1079
1080 static u32 ibmvnic_get_link(struct net_device *netdev)
1081 {
1082 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1083
1084 /* Don't need to send a query because we request a logical link up at
1085 * init and then we wait for link state indications
1086 */
1087 return adapter->logical_link_state;
1088 }
1089
1090 static void ibmvnic_get_ringparam(struct net_device *netdev,
1091 struct ethtool_ringparam *ring)
1092 {
1093 ring->rx_max_pending = 0;
1094 ring->tx_max_pending = 0;
1095 ring->rx_mini_max_pending = 0;
1096 ring->rx_jumbo_max_pending = 0;
1097 ring->rx_pending = 0;
1098 ring->tx_pending = 0;
1099 ring->rx_mini_pending = 0;
1100 ring->rx_jumbo_pending = 0;
1101 }
1102
1103 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1104 {
1105 int i;
1106
1107 if (stringset != ETH_SS_STATS)
1108 return;
1109
1110 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1111 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1112 }
1113
1114 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1115 {
1116 switch (sset) {
1117 case ETH_SS_STATS:
1118 return ARRAY_SIZE(ibmvnic_stats);
1119 default:
1120 return -EOPNOTSUPP;
1121 }
1122 }
1123
1124 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1125 struct ethtool_stats *stats, u64 *data)
1126 {
1127 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1128 union ibmvnic_crq crq;
1129 int i;
1130
1131 memset(&crq, 0, sizeof(crq));
1132 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1133 crq.request_statistics.cmd = REQUEST_STATISTICS;
1134 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1135 crq.request_statistics.len =
1136 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1137 ibmvnic_send_crq(adapter, &crq);
1138
1139 /* Wait for data to be written */
1140 init_completion(&adapter->stats_done);
1141 wait_for_completion(&adapter->stats_done);
1142
1143 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1144 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1145 }
1146
1147 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1148 .get_settings = ibmvnic_get_settings,
1149 .get_drvinfo = ibmvnic_get_drvinfo,
1150 .get_msglevel = ibmvnic_get_msglevel,
1151 .set_msglevel = ibmvnic_set_msglevel,
1152 .get_link = ibmvnic_get_link,
1153 .get_ringparam = ibmvnic_get_ringparam,
1154 .get_strings = ibmvnic_get_strings,
1155 .get_sset_count = ibmvnic_get_sset_count,
1156 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1157 };
1158
1159 /* Routines for managing CRQs/sCRQs */
1160
1161 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1162 struct ibmvnic_sub_crq_queue *scrq)
1163 {
1164 struct device *dev = &adapter->vdev->dev;
1165 long rc;
1166
1167 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1168
1169 /* Close the sub-crqs */
1170 do {
1171 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1172 adapter->vdev->unit_address,
1173 scrq->crq_num);
1174 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1175
1176 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1177 DMA_BIDIRECTIONAL);
1178 free_pages((unsigned long)scrq->msgs, 2);
1179 kfree(scrq);
1180 }
1181
1182 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1183 *adapter)
1184 {
1185 struct device *dev = &adapter->vdev->dev;
1186 struct ibmvnic_sub_crq_queue *scrq;
1187 int rc;
1188
1189 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1190 if (!scrq)
1191 return NULL;
1192
1193 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1194 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1195 if (!scrq->msgs) {
1196 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1197 goto zero_page_failed;
1198 }
1199
1200 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1201 DMA_BIDIRECTIONAL);
1202 if (dma_mapping_error(dev, scrq->msg_token)) {
1203 dev_warn(dev, "Couldn't map crq queue messages page\n");
1204 goto map_failed;
1205 }
1206
1207 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1208 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1209
1210 if (rc == H_RESOURCE)
1211 rc = ibmvnic_reset_crq(adapter);
1212
1213 if (rc == H_CLOSED) {
1214 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1215 } else if (rc) {
1216 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1217 goto reg_failed;
1218 }
1219
1220 scrq->adapter = adapter;
1221 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1222 scrq->cur = 0;
1223 scrq->rx_skb_top = NULL;
1224 spin_lock_init(&scrq->lock);
1225
1226 netdev_dbg(adapter->netdev,
1227 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1228 scrq->crq_num, scrq->hw_irq, scrq->irq);
1229
1230 return scrq;
1231
1232 reg_failed:
1233 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1234 DMA_BIDIRECTIONAL);
1235 map_failed:
1236 free_pages((unsigned long)scrq->msgs, 2);
1237 zero_page_failed:
1238 kfree(scrq);
1239
1240 return NULL;
1241 }
1242
1243 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1244 {
1245 int i;
1246
1247 if (adapter->tx_scrq) {
1248 for (i = 0; i < adapter->req_tx_queues; i++)
1249 if (adapter->tx_scrq[i]) {
1250 free_irq(adapter->tx_scrq[i]->irq,
1251 adapter->tx_scrq[i]);
1252 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1253 release_sub_crq_queue(adapter,
1254 adapter->tx_scrq[i]);
1255 }
1256 adapter->tx_scrq = NULL;
1257 }
1258
1259 if (adapter->rx_scrq) {
1260 for (i = 0; i < adapter->req_rx_queues; i++)
1261 if (adapter->rx_scrq[i]) {
1262 free_irq(adapter->rx_scrq[i]->irq,
1263 adapter->rx_scrq[i]);
1264 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1265 release_sub_crq_queue(adapter,
1266 adapter->rx_scrq[i]);
1267 }
1268 adapter->rx_scrq = NULL;
1269 }
1270
1271 adapter->requested_caps = 0;
1272 }
1273
1274 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1275 {
1276 int i;
1277
1278 if (adapter->tx_scrq) {
1279 for (i = 0; i < adapter->req_tx_queues; i++)
1280 if (adapter->tx_scrq[i])
1281 release_sub_crq_queue(adapter,
1282 adapter->tx_scrq[i]);
1283 adapter->tx_scrq = NULL;
1284 }
1285
1286 if (adapter->rx_scrq) {
1287 for (i = 0; i < adapter->req_rx_queues; i++)
1288 if (adapter->rx_scrq[i])
1289 release_sub_crq_queue(adapter,
1290 adapter->rx_scrq[i]);
1291 adapter->rx_scrq = NULL;
1292 }
1293
1294 adapter->requested_caps = 0;
1295 }
1296
1297 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1298 struct ibmvnic_sub_crq_queue *scrq)
1299 {
1300 struct device *dev = &adapter->vdev->dev;
1301 unsigned long rc;
1302
1303 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1304 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1305 if (rc)
1306 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1307 scrq->hw_irq, rc);
1308 return rc;
1309 }
1310
1311 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1312 struct ibmvnic_sub_crq_queue *scrq)
1313 {
1314 struct device *dev = &adapter->vdev->dev;
1315 unsigned long rc;
1316
1317 if (scrq->hw_irq > 0x100000000ULL) {
1318 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1319 return 1;
1320 }
1321
1322 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1323 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1324 if (rc)
1325 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1326 scrq->hw_irq, rc);
1327 return rc;
1328 }
1329
1330 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1331 struct ibmvnic_sub_crq_queue *scrq)
1332 {
1333 struct device *dev = &adapter->vdev->dev;
1334 struct ibmvnic_tx_buff *txbuff;
1335 union sub_crq *next;
1336 int index;
1337 int i, j;
1338 u8 first;
1339
1340 restart_loop:
1341 while (pending_scrq(adapter, scrq)) {
1342 unsigned int pool = scrq->pool_index;
1343
1344 next = ibmvnic_next_scrq(adapter, scrq);
1345 for (i = 0; i < next->tx_comp.num_comps; i++) {
1346 if (next->tx_comp.rcs[i]) {
1347 dev_err(dev, "tx error %x\n",
1348 next->tx_comp.rcs[i]);
1349 continue;
1350 }
1351 index = be32_to_cpu(next->tx_comp.correlators[i]);
1352 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1353
1354 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1355 if (!txbuff->data_dma[j])
1356 continue;
1357
1358 txbuff->data_dma[j] = 0;
1359 txbuff->used_bounce = false;
1360 }
1361 /* if sub_crq was sent indirectly */
1362 first = txbuff->indir_arr[0].generic.first;
1363 if (first == IBMVNIC_CRQ_CMD) {
1364 dma_unmap_single(dev, txbuff->indir_dma,
1365 sizeof(txbuff->indir_arr),
1366 DMA_TO_DEVICE);
1367 }
1368
1369 if (txbuff->last_frag)
1370 dev_kfree_skb_any(txbuff->skb);
1371
1372 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1373 producer_index] = index;
1374 adapter->tx_pool[pool].producer_index =
1375 (adapter->tx_pool[pool].producer_index + 1) %
1376 adapter->max_tx_entries_per_subcrq;
1377 }
1378 /* remove tx_comp scrq*/
1379 next->tx_comp.first = 0;
1380 }
1381
1382 enable_scrq_irq(adapter, scrq);
1383
1384 if (pending_scrq(adapter, scrq)) {
1385 disable_scrq_irq(adapter, scrq);
1386 goto restart_loop;
1387 }
1388
1389 return 0;
1390 }
1391
1392 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1393 {
1394 struct ibmvnic_sub_crq_queue *scrq = instance;
1395 struct ibmvnic_adapter *adapter = scrq->adapter;
1396
1397 disable_scrq_irq(adapter, scrq);
1398 ibmvnic_complete_tx(adapter, scrq);
1399
1400 return IRQ_HANDLED;
1401 }
1402
1403 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1404 {
1405 struct ibmvnic_sub_crq_queue *scrq = instance;
1406 struct ibmvnic_adapter *adapter = scrq->adapter;
1407
1408 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1409 disable_scrq_irq(adapter, scrq);
1410 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1411 }
1412
1413 return IRQ_HANDLED;
1414 }
1415
1416 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1417 {
1418 struct device *dev = &adapter->vdev->dev;
1419 struct ibmvnic_sub_crq_queue *scrq;
1420 int i = 0, j = 0;
1421 int rc = 0;
1422
1423 for (i = 0; i < adapter->req_tx_queues; i++) {
1424 scrq = adapter->tx_scrq[i];
1425 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1426
1427 if (scrq->irq == NO_IRQ) {
1428 rc = -EINVAL;
1429 dev_err(dev, "Error mapping irq\n");
1430 goto req_tx_irq_failed;
1431 }
1432
1433 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1434 0, "ibmvnic_tx", scrq);
1435
1436 if (rc) {
1437 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1438 scrq->irq, rc);
1439 irq_dispose_mapping(scrq->irq);
1440 goto req_rx_irq_failed;
1441 }
1442 }
1443
1444 for (i = 0; i < adapter->req_rx_queues; i++) {
1445 scrq = adapter->rx_scrq[i];
1446 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1447 if (scrq->irq == NO_IRQ) {
1448 rc = -EINVAL;
1449 dev_err(dev, "Error mapping irq\n");
1450 goto req_rx_irq_failed;
1451 }
1452 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1453 0, "ibmvnic_rx", scrq);
1454 if (rc) {
1455 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1456 scrq->irq, rc);
1457 irq_dispose_mapping(scrq->irq);
1458 goto req_rx_irq_failed;
1459 }
1460 }
1461 return rc;
1462
1463 req_rx_irq_failed:
1464 for (j = 0; j < i; j++)
1465 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1466 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1467 i = adapter->req_tx_queues;
1468 req_tx_irq_failed:
1469 for (j = 0; j < i; j++)
1470 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1471 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1472 release_sub_crqs_no_irqs(adapter);
1473 return rc;
1474 }
1475
1476 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1477 {
1478 struct device *dev = &adapter->vdev->dev;
1479 struct ibmvnic_sub_crq_queue **allqueues;
1480 int registered_queues = 0;
1481 union ibmvnic_crq crq;
1482 int total_queues;
1483 int more = 0;
1484 int i;
1485
1486 if (!retry) {
1487 /* Sub-CRQ entries are 32 byte long */
1488 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1489
1490 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1491 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1492 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1493 goto allqueues_failed;
1494 }
1495
1496 /* Get the minimum between the queried max and the entries
1497 * that fit in our PAGE_SIZE
1498 */
1499 adapter->req_tx_entries_per_subcrq =
1500 adapter->max_tx_entries_per_subcrq > entries_page ?
1501 entries_page : adapter->max_tx_entries_per_subcrq;
1502 adapter->req_rx_add_entries_per_subcrq =
1503 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1504 entries_page : adapter->max_rx_add_entries_per_subcrq;
1505
1506 /* Choosing the maximum number of queues supported by firmware*/
1507 adapter->req_tx_queues = adapter->max_tx_queues;
1508 adapter->req_rx_queues = adapter->max_rx_queues;
1509 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1510
1511 adapter->req_mtu = adapter->max_mtu;
1512 }
1513
1514 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1515
1516 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1517 if (!allqueues)
1518 goto allqueues_failed;
1519
1520 for (i = 0; i < total_queues; i++) {
1521 allqueues[i] = init_sub_crq_queue(adapter);
1522 if (!allqueues[i]) {
1523 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1524 break;
1525 }
1526 registered_queues++;
1527 }
1528
1529 /* Make sure we were able to register the minimum number of queues */
1530 if (registered_queues <
1531 adapter->min_tx_queues + adapter->min_rx_queues) {
1532 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1533 goto tx_failed;
1534 }
1535
1536 /* Distribute the failed allocated queues*/
1537 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1538 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1539 switch (i % 3) {
1540 case 0:
1541 if (adapter->req_rx_queues > adapter->min_rx_queues)
1542 adapter->req_rx_queues--;
1543 else
1544 more++;
1545 break;
1546 case 1:
1547 if (adapter->req_tx_queues > adapter->min_tx_queues)
1548 adapter->req_tx_queues--;
1549 else
1550 more++;
1551 break;
1552 }
1553 }
1554
1555 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1556 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1557 if (!adapter->tx_scrq)
1558 goto tx_failed;
1559
1560 for (i = 0; i < adapter->req_tx_queues; i++) {
1561 adapter->tx_scrq[i] = allqueues[i];
1562 adapter->tx_scrq[i]->pool_index = i;
1563 }
1564
1565 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1566 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1567 if (!adapter->rx_scrq)
1568 goto rx_failed;
1569
1570 for (i = 0; i < adapter->req_rx_queues; i++) {
1571 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1572 adapter->rx_scrq[i]->scrq_num = i;
1573 }
1574
1575 memset(&crq, 0, sizeof(crq));
1576 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1577 crq.request_capability.cmd = REQUEST_CAPABILITY;
1578
1579 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1580 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1581 ibmvnic_send_crq(adapter, &crq);
1582
1583 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1584 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1585 ibmvnic_send_crq(adapter, &crq);
1586
1587 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1588 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1589 ibmvnic_send_crq(adapter, &crq);
1590
1591 crq.request_capability.capability =
1592 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1593 crq.request_capability.number =
1594 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1595 ibmvnic_send_crq(adapter, &crq);
1596
1597 crq.request_capability.capability =
1598 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1599 crq.request_capability.number =
1600 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1601 ibmvnic_send_crq(adapter, &crq);
1602
1603 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1604 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1605 ibmvnic_send_crq(adapter, &crq);
1606
1607 if (adapter->netdev->flags & IFF_PROMISC) {
1608 if (adapter->promisc_supported) {
1609 crq.request_capability.capability =
1610 cpu_to_be16(PROMISC_REQUESTED);
1611 crq.request_capability.number = cpu_to_be64(1);
1612 ibmvnic_send_crq(adapter, &crq);
1613 }
1614 } else {
1615 crq.request_capability.capability =
1616 cpu_to_be16(PROMISC_REQUESTED);
1617 crq.request_capability.number = cpu_to_be64(0);
1618 ibmvnic_send_crq(adapter, &crq);
1619 }
1620
1621 kfree(allqueues);
1622
1623 return;
1624
1625 rx_failed:
1626 kfree(adapter->tx_scrq);
1627 adapter->tx_scrq = NULL;
1628 tx_failed:
1629 for (i = 0; i < registered_queues; i++)
1630 release_sub_crq_queue(adapter, allqueues[i]);
1631 kfree(allqueues);
1632 allqueues_failed:
1633 ibmvnic_remove(adapter->vdev);
1634 }
1635
1636 static int pending_scrq(struct ibmvnic_adapter *adapter,
1637 struct ibmvnic_sub_crq_queue *scrq)
1638 {
1639 union sub_crq *entry = &scrq->msgs[scrq->cur];
1640
1641 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1642 return 1;
1643 else
1644 return 0;
1645 }
1646
1647 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1648 struct ibmvnic_sub_crq_queue *scrq)
1649 {
1650 union sub_crq *entry;
1651 unsigned long flags;
1652
1653 spin_lock_irqsave(&scrq->lock, flags);
1654 entry = &scrq->msgs[scrq->cur];
1655 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1656 if (++scrq->cur == scrq->size)
1657 scrq->cur = 0;
1658 } else {
1659 entry = NULL;
1660 }
1661 spin_unlock_irqrestore(&scrq->lock, flags);
1662
1663 return entry;
1664 }
1665
1666 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1667 {
1668 struct ibmvnic_crq_queue *queue = &adapter->crq;
1669 union ibmvnic_crq *crq;
1670
1671 crq = &queue->msgs[queue->cur];
1672 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1673 if (++queue->cur == queue->size)
1674 queue->cur = 0;
1675 } else {
1676 crq = NULL;
1677 }
1678
1679 return crq;
1680 }
1681
1682 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1683 union sub_crq *sub_crq)
1684 {
1685 unsigned int ua = adapter->vdev->unit_address;
1686 struct device *dev = &adapter->vdev->dev;
1687 u64 *u64_crq = (u64 *)sub_crq;
1688 int rc;
1689
1690 netdev_dbg(adapter->netdev,
1691 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1692 (unsigned long int)cpu_to_be64(remote_handle),
1693 (unsigned long int)cpu_to_be64(u64_crq[0]),
1694 (unsigned long int)cpu_to_be64(u64_crq[1]),
1695 (unsigned long int)cpu_to_be64(u64_crq[2]),
1696 (unsigned long int)cpu_to_be64(u64_crq[3]));
1697
1698 /* Make sure the hypervisor sees the complete request */
1699 mb();
1700
1701 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1702 cpu_to_be64(remote_handle),
1703 cpu_to_be64(u64_crq[0]),
1704 cpu_to_be64(u64_crq[1]),
1705 cpu_to_be64(u64_crq[2]),
1706 cpu_to_be64(u64_crq[3]));
1707
1708 if (rc) {
1709 if (rc == H_CLOSED)
1710 dev_warn(dev, "CRQ Queue closed\n");
1711 dev_err(dev, "Send error (rc=%d)\n", rc);
1712 }
1713
1714 return rc;
1715 }
1716
1717 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1718 u64 remote_handle, u64 ioba, u64 num_entries)
1719 {
1720 unsigned int ua = adapter->vdev->unit_address;
1721 struct device *dev = &adapter->vdev->dev;
1722 int rc;
1723
1724 /* Make sure the hypervisor sees the complete request */
1725 mb();
1726 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1727 cpu_to_be64(remote_handle),
1728 ioba, num_entries);
1729
1730 if (rc) {
1731 if (rc == H_CLOSED)
1732 dev_warn(dev, "CRQ Queue closed\n");
1733 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1734 }
1735
1736 return rc;
1737 }
1738
1739 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1740 union ibmvnic_crq *crq)
1741 {
1742 unsigned int ua = adapter->vdev->unit_address;
1743 struct device *dev = &adapter->vdev->dev;
1744 u64 *u64_crq = (u64 *)crq;
1745 int rc;
1746
1747 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1748 (unsigned long int)cpu_to_be64(u64_crq[0]),
1749 (unsigned long int)cpu_to_be64(u64_crq[1]));
1750
1751 /* Make sure the hypervisor sees the complete request */
1752 mb();
1753
1754 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1755 cpu_to_be64(u64_crq[0]),
1756 cpu_to_be64(u64_crq[1]));
1757
1758 if (rc) {
1759 if (rc == H_CLOSED)
1760 dev_warn(dev, "CRQ Queue closed\n");
1761 dev_warn(dev, "Send error (rc=%d)\n", rc);
1762 }
1763
1764 return rc;
1765 }
1766
1767 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1768 {
1769 union ibmvnic_crq crq;
1770
1771 memset(&crq, 0, sizeof(crq));
1772 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1773 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1774 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1775
1776 return ibmvnic_send_crq(adapter, &crq);
1777 }
1778
1779 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1780 {
1781 union ibmvnic_crq crq;
1782
1783 memset(&crq, 0, sizeof(crq));
1784 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1785 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1786 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1787
1788 return ibmvnic_send_crq(adapter, &crq);
1789 }
1790
1791 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1792 {
1793 union ibmvnic_crq crq;
1794
1795 memset(&crq, 0, sizeof(crq));
1796 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1797 crq.version_exchange.cmd = VERSION_EXCHANGE;
1798 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1799
1800 return ibmvnic_send_crq(adapter, &crq);
1801 }
1802
1803 static void send_login(struct ibmvnic_adapter *adapter)
1804 {
1805 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1806 struct ibmvnic_login_buffer *login_buffer;
1807 struct ibmvnic_inflight_cmd *inflight_cmd;
1808 struct device *dev = &adapter->vdev->dev;
1809 dma_addr_t rsp_buffer_token;
1810 dma_addr_t buffer_token;
1811 size_t rsp_buffer_size;
1812 union ibmvnic_crq crq;
1813 unsigned long flags;
1814 size_t buffer_size;
1815 __be64 *tx_list_p;
1816 __be64 *rx_list_p;
1817 int i;
1818
1819 buffer_size =
1820 sizeof(struct ibmvnic_login_buffer) +
1821 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1822
1823 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1824 if (!login_buffer)
1825 goto buf_alloc_failed;
1826
1827 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1828 DMA_TO_DEVICE);
1829 if (dma_mapping_error(dev, buffer_token)) {
1830 dev_err(dev, "Couldn't map login buffer\n");
1831 goto buf_map_failed;
1832 }
1833
1834 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1835 sizeof(u64) * adapter->req_tx_queues +
1836 sizeof(u64) * adapter->req_rx_queues +
1837 sizeof(u64) * adapter->req_rx_queues +
1838 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1839
1840 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1841 if (!login_rsp_buffer)
1842 goto buf_rsp_alloc_failed;
1843
1844 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1845 rsp_buffer_size, DMA_FROM_DEVICE);
1846 if (dma_mapping_error(dev, rsp_buffer_token)) {
1847 dev_err(dev, "Couldn't map login rsp buffer\n");
1848 goto buf_rsp_map_failed;
1849 }
1850 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1851 if (!inflight_cmd) {
1852 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1853 goto inflight_alloc_failed;
1854 }
1855 adapter->login_buf = login_buffer;
1856 adapter->login_buf_token = buffer_token;
1857 adapter->login_buf_sz = buffer_size;
1858 adapter->login_rsp_buf = login_rsp_buffer;
1859 adapter->login_rsp_buf_token = rsp_buffer_token;
1860 adapter->login_rsp_buf_sz = rsp_buffer_size;
1861
1862 login_buffer->len = cpu_to_be32(buffer_size);
1863 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1864 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1865 login_buffer->off_txcomp_subcrqs =
1866 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1867 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1868 login_buffer->off_rxcomp_subcrqs =
1869 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1870 sizeof(u64) * adapter->req_tx_queues);
1871 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1872 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1873
1874 tx_list_p = (__be64 *)((char *)login_buffer +
1875 sizeof(struct ibmvnic_login_buffer));
1876 rx_list_p = (__be64 *)((char *)login_buffer +
1877 sizeof(struct ibmvnic_login_buffer) +
1878 sizeof(u64) * adapter->req_tx_queues);
1879
1880 for (i = 0; i < adapter->req_tx_queues; i++) {
1881 if (adapter->tx_scrq[i]) {
1882 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1883 crq_num);
1884 }
1885 }
1886
1887 for (i = 0; i < adapter->req_rx_queues; i++) {
1888 if (adapter->rx_scrq[i]) {
1889 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1890 crq_num);
1891 }
1892 }
1893
1894 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1895 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1896 netdev_dbg(adapter->netdev, "%016lx\n",
1897 ((unsigned long int *)(adapter->login_buf))[i]);
1898 }
1899
1900 memset(&crq, 0, sizeof(crq));
1901 crq.login.first = IBMVNIC_CRQ_CMD;
1902 crq.login.cmd = LOGIN;
1903 crq.login.ioba = cpu_to_be32(buffer_token);
1904 crq.login.len = cpu_to_be32(buffer_size);
1905
1906 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1907
1908 spin_lock_irqsave(&adapter->inflight_lock, flags);
1909 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1910 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1911
1912 ibmvnic_send_crq(adapter, &crq);
1913
1914 return;
1915
1916 inflight_alloc_failed:
1917 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1918 DMA_FROM_DEVICE);
1919 buf_rsp_map_failed:
1920 kfree(login_rsp_buffer);
1921 buf_rsp_alloc_failed:
1922 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1923 buf_map_failed:
1924 kfree(login_buffer);
1925 buf_alloc_failed:
1926 return;
1927 }
1928
1929 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1930 u32 len, u8 map_id)
1931 {
1932 union ibmvnic_crq crq;
1933
1934 memset(&crq, 0, sizeof(crq));
1935 crq.request_map.first = IBMVNIC_CRQ_CMD;
1936 crq.request_map.cmd = REQUEST_MAP;
1937 crq.request_map.map_id = map_id;
1938 crq.request_map.ioba = cpu_to_be32(addr);
1939 crq.request_map.len = cpu_to_be32(len);
1940 ibmvnic_send_crq(adapter, &crq);
1941 }
1942
1943 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1944 {
1945 union ibmvnic_crq crq;
1946
1947 memset(&crq, 0, sizeof(crq));
1948 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1949 crq.request_unmap.cmd = REQUEST_UNMAP;
1950 crq.request_unmap.map_id = map_id;
1951 ibmvnic_send_crq(adapter, &crq);
1952 }
1953
1954 static void send_map_query(struct ibmvnic_adapter *adapter)
1955 {
1956 union ibmvnic_crq crq;
1957
1958 memset(&crq, 0, sizeof(crq));
1959 crq.query_map.first = IBMVNIC_CRQ_CMD;
1960 crq.query_map.cmd = QUERY_MAP;
1961 ibmvnic_send_crq(adapter, &crq);
1962 }
1963
1964 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1965 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1966 {
1967 union ibmvnic_crq crq;
1968
1969 atomic_set(&adapter->running_cap_queries, 0);
1970 memset(&crq, 0, sizeof(crq));
1971 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1972 crq.query_capability.cmd = QUERY_CAPABILITY;
1973
1974 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1975 atomic_inc(&adapter->running_cap_queries);
1976 ibmvnic_send_crq(adapter, &crq);
1977
1978 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1979 atomic_inc(&adapter->running_cap_queries);
1980 ibmvnic_send_crq(adapter, &crq);
1981
1982 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1983 atomic_inc(&adapter->running_cap_queries);
1984 ibmvnic_send_crq(adapter, &crq);
1985
1986 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1987 atomic_inc(&adapter->running_cap_queries);
1988 ibmvnic_send_crq(adapter, &crq);
1989
1990 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1991 atomic_inc(&adapter->running_cap_queries);
1992 ibmvnic_send_crq(adapter, &crq);
1993
1994 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1995 atomic_inc(&adapter->running_cap_queries);
1996 ibmvnic_send_crq(adapter, &crq);
1997
1998 crq.query_capability.capability =
1999 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2000 atomic_inc(&adapter->running_cap_queries);
2001 ibmvnic_send_crq(adapter, &crq);
2002
2003 crq.query_capability.capability =
2004 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2005 atomic_inc(&adapter->running_cap_queries);
2006 ibmvnic_send_crq(adapter, &crq);
2007
2008 crq.query_capability.capability =
2009 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2010 atomic_inc(&adapter->running_cap_queries);
2011 ibmvnic_send_crq(adapter, &crq);
2012
2013 crq.query_capability.capability =
2014 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2015 atomic_inc(&adapter->running_cap_queries);
2016 ibmvnic_send_crq(adapter, &crq);
2017
2018 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2019 atomic_inc(&adapter->running_cap_queries);
2020 ibmvnic_send_crq(adapter, &crq);
2021
2022 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2023 atomic_inc(&adapter->running_cap_queries);
2024 ibmvnic_send_crq(adapter, &crq);
2025
2026 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2027 atomic_inc(&adapter->running_cap_queries);
2028 ibmvnic_send_crq(adapter, &crq);
2029
2030 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2031 atomic_inc(&adapter->running_cap_queries);
2032 ibmvnic_send_crq(adapter, &crq);
2033
2034 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2035 atomic_inc(&adapter->running_cap_queries);
2036 ibmvnic_send_crq(adapter, &crq);
2037
2038 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2039 atomic_inc(&adapter->running_cap_queries);
2040 ibmvnic_send_crq(adapter, &crq);
2041
2042 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2043 atomic_inc(&adapter->running_cap_queries);
2044 ibmvnic_send_crq(adapter, &crq);
2045
2046 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2047 atomic_inc(&adapter->running_cap_queries);
2048 ibmvnic_send_crq(adapter, &crq);
2049
2050 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2051 atomic_inc(&adapter->running_cap_queries);
2052 ibmvnic_send_crq(adapter, &crq);
2053
2054 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2055 atomic_inc(&adapter->running_cap_queries);
2056 ibmvnic_send_crq(adapter, &crq);
2057
2058 crq.query_capability.capability =
2059 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2060 atomic_inc(&adapter->running_cap_queries);
2061 ibmvnic_send_crq(adapter, &crq);
2062
2063 crq.query_capability.capability =
2064 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2065 atomic_inc(&adapter->running_cap_queries);
2066 ibmvnic_send_crq(adapter, &crq);
2067
2068 crq.query_capability.capability =
2069 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2070 atomic_inc(&adapter->running_cap_queries);
2071 ibmvnic_send_crq(adapter, &crq);
2072
2073 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2074 atomic_inc(&adapter->running_cap_queries);
2075 ibmvnic_send_crq(adapter, &crq);
2076 }
2077
2078 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2079 {
2080 struct device *dev = &adapter->vdev->dev;
2081 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2082 union ibmvnic_crq crq;
2083 int i;
2084
2085 dma_unmap_single(dev, adapter->ip_offload_tok,
2086 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2087
2088 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2089 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2090 netdev_dbg(adapter->netdev, "%016lx\n",
2091 ((unsigned long int *)(buf))[i]);
2092
2093 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2094 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2095 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2096 buf->tcp_ipv4_chksum);
2097 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2098 buf->tcp_ipv6_chksum);
2099 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2100 buf->udp_ipv4_chksum);
2101 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2102 buf->udp_ipv6_chksum);
2103 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2104 buf->large_tx_ipv4);
2105 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2106 buf->large_tx_ipv6);
2107 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2108 buf->large_rx_ipv4);
2109 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2110 buf->large_rx_ipv6);
2111 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2112 buf->max_ipv4_header_size);
2113 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2114 buf->max_ipv6_header_size);
2115 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2116 buf->max_tcp_header_size);
2117 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2118 buf->max_udp_header_size);
2119 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2120 buf->max_large_tx_size);
2121 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2122 buf->max_large_rx_size);
2123 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2124 buf->ipv6_extension_header);
2125 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2126 buf->tcp_pseudosum_req);
2127 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2128 buf->num_ipv6_ext_headers);
2129 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2130 buf->off_ipv6_ext_headers);
2131
2132 adapter->ip_offload_ctrl_tok =
2133 dma_map_single(dev, &adapter->ip_offload_ctrl,
2134 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2135
2136 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2137 dev_err(dev, "Couldn't map ip offload control buffer\n");
2138 return;
2139 }
2140
2141 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2142 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2143 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2144 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2145 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2146
2147 /* large_tx/rx disabled for now, additional features needed */
2148 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2149 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2150 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2151 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2152
2153 adapter->netdev->features = NETIF_F_GSO;
2154
2155 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2156 adapter->netdev->features |= NETIF_F_IP_CSUM;
2157
2158 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2159 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2160
2161 if ((adapter->netdev->features &
2162 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2163 adapter->netdev->features |= NETIF_F_RXCSUM;
2164
2165 memset(&crq, 0, sizeof(crq));
2166 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2167 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2168 crq.control_ip_offload.len =
2169 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2170 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2171 ibmvnic_send_crq(adapter, &crq);
2172 }
2173
2174 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2175 struct ibmvnic_adapter *adapter)
2176 {
2177 struct device *dev = &adapter->vdev->dev;
2178 struct ibmvnic_error_buff *error_buff, *tmp;
2179 unsigned long flags;
2180 bool found = false;
2181 int i;
2182
2183 if (!crq->request_error_rsp.rc.code) {
2184 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2185 crq->request_error_rsp.rc.code);
2186 return;
2187 }
2188
2189 spin_lock_irqsave(&adapter->error_list_lock, flags);
2190 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2191 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2192 found = true;
2193 list_del(&error_buff->list);
2194 break;
2195 }
2196 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2197
2198 if (!found) {
2199 dev_err(dev, "Couldn't find error id %x\n",
2200 crq->request_error_rsp.error_id);
2201 return;
2202 }
2203
2204 dev_err(dev, "Detailed info for error id %x:",
2205 crq->request_error_rsp.error_id);
2206
2207 for (i = 0; i < error_buff->len; i++) {
2208 pr_cont("%02x", (int)error_buff->buff[i]);
2209 if (i % 8 == 7)
2210 pr_cont(" ");
2211 }
2212 pr_cont("\n");
2213
2214 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2215 DMA_FROM_DEVICE);
2216 kfree(error_buff->buff);
2217 kfree(error_buff);
2218 }
2219
2220 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2221 struct ibmvnic_adapter *adapter)
2222 {
2223 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2224 struct ibmvnic_inflight_cmd *inflight_cmd;
2225 struct device *dev = &adapter->vdev->dev;
2226 union ibmvnic_crq newcrq;
2227 unsigned long flags;
2228
2229 /* allocate and map buffer */
2230 adapter->dump_data = kmalloc(len, GFP_KERNEL);
2231 if (!adapter->dump_data) {
2232 complete(&adapter->fw_done);
2233 return;
2234 }
2235
2236 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2237 DMA_FROM_DEVICE);
2238
2239 if (dma_mapping_error(dev, adapter->dump_data_token)) {
2240 if (!firmware_has_feature(FW_FEATURE_CMO))
2241 dev_err(dev, "Couldn't map dump data\n");
2242 kfree(adapter->dump_data);
2243 complete(&adapter->fw_done);
2244 return;
2245 }
2246
2247 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2248 if (!inflight_cmd) {
2249 dma_unmap_single(dev, adapter->dump_data_token, len,
2250 DMA_FROM_DEVICE);
2251 kfree(adapter->dump_data);
2252 complete(&adapter->fw_done);
2253 return;
2254 }
2255
2256 memset(&newcrq, 0, sizeof(newcrq));
2257 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2258 newcrq.request_dump.cmd = REQUEST_DUMP;
2259 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2260 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2261
2262 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2263
2264 spin_lock_irqsave(&adapter->inflight_lock, flags);
2265 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2266 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2267
2268 ibmvnic_send_crq(adapter, &newcrq);
2269 }
2270
2271 static void handle_error_indication(union ibmvnic_crq *crq,
2272 struct ibmvnic_adapter *adapter)
2273 {
2274 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2275 struct ibmvnic_inflight_cmd *inflight_cmd;
2276 struct device *dev = &adapter->vdev->dev;
2277 struct ibmvnic_error_buff *error_buff;
2278 union ibmvnic_crq new_crq;
2279 unsigned long flags;
2280
2281 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2282 crq->error_indication.
2283 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2284 crq->error_indication.error_id,
2285 crq->error_indication.error_cause);
2286
2287 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2288 if (!error_buff)
2289 return;
2290
2291 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2292 if (!error_buff->buff) {
2293 kfree(error_buff);
2294 return;
2295 }
2296
2297 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2298 DMA_FROM_DEVICE);
2299 if (dma_mapping_error(dev, error_buff->dma)) {
2300 if (!firmware_has_feature(FW_FEATURE_CMO))
2301 dev_err(dev, "Couldn't map error buffer\n");
2302 kfree(error_buff->buff);
2303 kfree(error_buff);
2304 return;
2305 }
2306
2307 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2308 if (!inflight_cmd) {
2309 dma_unmap_single(dev, error_buff->dma, detail_len,
2310 DMA_FROM_DEVICE);
2311 kfree(error_buff->buff);
2312 kfree(error_buff);
2313 return;
2314 }
2315
2316 error_buff->len = detail_len;
2317 error_buff->error_id = crq->error_indication.error_id;
2318
2319 spin_lock_irqsave(&adapter->error_list_lock, flags);
2320 list_add_tail(&error_buff->list, &adapter->errors);
2321 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2322
2323 memset(&new_crq, 0, sizeof(new_crq));
2324 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2325 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2326 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2327 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2328 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2329
2330 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2331
2332 spin_lock_irqsave(&adapter->inflight_lock, flags);
2333 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2334 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2335
2336 ibmvnic_send_crq(adapter, &new_crq);
2337 }
2338
2339 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2340 struct ibmvnic_adapter *adapter)
2341 {
2342 struct net_device *netdev = adapter->netdev;
2343 struct device *dev = &adapter->vdev->dev;
2344 long rc;
2345
2346 rc = crq->change_mac_addr_rsp.rc.code;
2347 if (rc) {
2348 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2349 return;
2350 }
2351 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2352 ETH_ALEN);
2353 }
2354
2355 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2356 struct ibmvnic_adapter *adapter)
2357 {
2358 struct device *dev = &adapter->vdev->dev;
2359 u64 *req_value;
2360 char *name;
2361
2362 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2363 case REQ_TX_QUEUES:
2364 req_value = &adapter->req_tx_queues;
2365 name = "tx";
2366 break;
2367 case REQ_RX_QUEUES:
2368 req_value = &adapter->req_rx_queues;
2369 name = "rx";
2370 break;
2371 case REQ_RX_ADD_QUEUES:
2372 req_value = &adapter->req_rx_add_queues;
2373 name = "rx_add";
2374 break;
2375 case REQ_TX_ENTRIES_PER_SUBCRQ:
2376 req_value = &adapter->req_tx_entries_per_subcrq;
2377 name = "tx_entries_per_subcrq";
2378 break;
2379 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2380 req_value = &adapter->req_rx_add_entries_per_subcrq;
2381 name = "rx_add_entries_per_subcrq";
2382 break;
2383 case REQ_MTU:
2384 req_value = &adapter->req_mtu;
2385 name = "mtu";
2386 break;
2387 case PROMISC_REQUESTED:
2388 req_value = &adapter->promisc;
2389 name = "promisc";
2390 break;
2391 default:
2392 dev_err(dev, "Got invalid cap request rsp %d\n",
2393 crq->request_capability.capability);
2394 return;
2395 }
2396
2397 switch (crq->request_capability_rsp.rc.code) {
2398 case SUCCESS:
2399 break;
2400 case PARTIALSUCCESS:
2401 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2402 *req_value,
2403 (long int)be32_to_cpu(crq->request_capability_rsp.
2404 number), name);
2405 release_sub_crqs_no_irqs(adapter);
2406 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2407 init_sub_crqs(adapter, 1);
2408 return;
2409 default:
2410 dev_err(dev, "Error %d in request cap rsp\n",
2411 crq->request_capability_rsp.rc.code);
2412 return;
2413 }
2414
2415 /* Done receiving requested capabilities, query IP offload support */
2416 if (++adapter->requested_caps == 7) {
2417 union ibmvnic_crq newcrq;
2418 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2419 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2420 &adapter->ip_offload_buf;
2421
2422 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2423 buf_sz,
2424 DMA_FROM_DEVICE);
2425
2426 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2427 if (!firmware_has_feature(FW_FEATURE_CMO))
2428 dev_err(dev, "Couldn't map offload buffer\n");
2429 return;
2430 }
2431
2432 memset(&newcrq, 0, sizeof(newcrq));
2433 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2434 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2435 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2436 newcrq.query_ip_offload.ioba =
2437 cpu_to_be32(adapter->ip_offload_tok);
2438
2439 ibmvnic_send_crq(adapter, &newcrq);
2440 }
2441 }
2442
2443 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2444 struct ibmvnic_adapter *adapter)
2445 {
2446 struct device *dev = &adapter->vdev->dev;
2447 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2448 struct ibmvnic_login_buffer *login = adapter->login_buf;
2449 union ibmvnic_crq crq;
2450 int i;
2451
2452 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2453 DMA_BIDIRECTIONAL);
2454 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2455 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2456
2457 /* If the number of queues requested can't be allocated by the
2458 * server, the login response will return with code 1. We will need
2459 * to resend the login buffer with fewer queues requested.
2460 */
2461 if (login_rsp_crq->generic.rc.code) {
2462 adapter->renegotiate = true;
2463 complete(&adapter->init_done);
2464 return 0;
2465 }
2466
2467 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2468 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2469 netdev_dbg(adapter->netdev, "%016lx\n",
2470 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2471 }
2472
2473 /* Sanity checks */
2474 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2475 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2476 adapter->req_rx_add_queues !=
2477 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2478 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2479 ibmvnic_remove(adapter->vdev);
2480 return -EIO;
2481 }
2482 complete(&adapter->init_done);
2483
2484 memset(&crq, 0, sizeof(crq));
2485 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2486 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2487 ibmvnic_send_crq(adapter, &crq);
2488
2489 return 0;
2490 }
2491
2492 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2493 struct ibmvnic_adapter *adapter)
2494 {
2495 struct device *dev = &adapter->vdev->dev;
2496 u8 map_id = crq->request_map_rsp.map_id;
2497 int tx_subcrqs;
2498 int rx_subcrqs;
2499 long rc;
2500 int i;
2501
2502 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2503 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2504
2505 rc = crq->request_map_rsp.rc.code;
2506 if (rc) {
2507 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2508 adapter->map_id--;
2509 /* need to find and zero tx/rx_pool map_id */
2510 for (i = 0; i < tx_subcrqs; i++) {
2511 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2512 adapter->tx_pool[i].long_term_buff.map_id = 0;
2513 }
2514 for (i = 0; i < rx_subcrqs; i++) {
2515 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2516 adapter->rx_pool[i].long_term_buff.map_id = 0;
2517 }
2518 }
2519 complete(&adapter->fw_done);
2520 }
2521
2522 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2523 struct ibmvnic_adapter *adapter)
2524 {
2525 struct device *dev = &adapter->vdev->dev;
2526 long rc;
2527
2528 rc = crq->request_unmap_rsp.rc.code;
2529 if (rc)
2530 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2531 }
2532
2533 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2534 struct ibmvnic_adapter *adapter)
2535 {
2536 struct net_device *netdev = adapter->netdev;
2537 struct device *dev = &adapter->vdev->dev;
2538 long rc;
2539
2540 rc = crq->query_map_rsp.rc.code;
2541 if (rc) {
2542 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2543 return;
2544 }
2545 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2546 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2547 crq->query_map_rsp.free_pages);
2548 }
2549
2550 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2551 struct ibmvnic_adapter *adapter)
2552 {
2553 struct net_device *netdev = adapter->netdev;
2554 struct device *dev = &adapter->vdev->dev;
2555 long rc;
2556
2557 atomic_dec(&adapter->running_cap_queries);
2558 netdev_dbg(netdev, "Outstanding queries: %d\n",
2559 atomic_read(&adapter->running_cap_queries));
2560 rc = crq->query_capability.rc.code;
2561 if (rc) {
2562 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2563 goto out;
2564 }
2565
2566 switch (be16_to_cpu(crq->query_capability.capability)) {
2567 case MIN_TX_QUEUES:
2568 adapter->min_tx_queues =
2569 be64_to_cpu(crq->query_capability.number);
2570 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2571 adapter->min_tx_queues);
2572 break;
2573 case MIN_RX_QUEUES:
2574 adapter->min_rx_queues =
2575 be64_to_cpu(crq->query_capability.number);
2576 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2577 adapter->min_rx_queues);
2578 break;
2579 case MIN_RX_ADD_QUEUES:
2580 adapter->min_rx_add_queues =
2581 be64_to_cpu(crq->query_capability.number);
2582 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2583 adapter->min_rx_add_queues);
2584 break;
2585 case MAX_TX_QUEUES:
2586 adapter->max_tx_queues =
2587 be64_to_cpu(crq->query_capability.number);
2588 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2589 adapter->max_tx_queues);
2590 break;
2591 case MAX_RX_QUEUES:
2592 adapter->max_rx_queues =
2593 be64_to_cpu(crq->query_capability.number);
2594 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2595 adapter->max_rx_queues);
2596 break;
2597 case MAX_RX_ADD_QUEUES:
2598 adapter->max_rx_add_queues =
2599 be64_to_cpu(crq->query_capability.number);
2600 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2601 adapter->max_rx_add_queues);
2602 break;
2603 case MIN_TX_ENTRIES_PER_SUBCRQ:
2604 adapter->min_tx_entries_per_subcrq =
2605 be64_to_cpu(crq->query_capability.number);
2606 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2607 adapter->min_tx_entries_per_subcrq);
2608 break;
2609 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2610 adapter->min_rx_add_entries_per_subcrq =
2611 be64_to_cpu(crq->query_capability.number);
2612 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2613 adapter->min_rx_add_entries_per_subcrq);
2614 break;
2615 case MAX_TX_ENTRIES_PER_SUBCRQ:
2616 adapter->max_tx_entries_per_subcrq =
2617 be64_to_cpu(crq->query_capability.number);
2618 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2619 adapter->max_tx_entries_per_subcrq);
2620 break;
2621 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2622 adapter->max_rx_add_entries_per_subcrq =
2623 be64_to_cpu(crq->query_capability.number);
2624 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2625 adapter->max_rx_add_entries_per_subcrq);
2626 break;
2627 case TCP_IP_OFFLOAD:
2628 adapter->tcp_ip_offload =
2629 be64_to_cpu(crq->query_capability.number);
2630 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2631 adapter->tcp_ip_offload);
2632 break;
2633 case PROMISC_SUPPORTED:
2634 adapter->promisc_supported =
2635 be64_to_cpu(crq->query_capability.number);
2636 netdev_dbg(netdev, "promisc_supported = %lld\n",
2637 adapter->promisc_supported);
2638 break;
2639 case MIN_MTU:
2640 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2641 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2642 break;
2643 case MAX_MTU:
2644 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2645 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2646 break;
2647 case MAX_MULTICAST_FILTERS:
2648 adapter->max_multicast_filters =
2649 be64_to_cpu(crq->query_capability.number);
2650 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2651 adapter->max_multicast_filters);
2652 break;
2653 case VLAN_HEADER_INSERTION:
2654 adapter->vlan_header_insertion =
2655 be64_to_cpu(crq->query_capability.number);
2656 if (adapter->vlan_header_insertion)
2657 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2658 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2659 adapter->vlan_header_insertion);
2660 break;
2661 case MAX_TX_SG_ENTRIES:
2662 adapter->max_tx_sg_entries =
2663 be64_to_cpu(crq->query_capability.number);
2664 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2665 adapter->max_tx_sg_entries);
2666 break;
2667 case RX_SG_SUPPORTED:
2668 adapter->rx_sg_supported =
2669 be64_to_cpu(crq->query_capability.number);
2670 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2671 adapter->rx_sg_supported);
2672 break;
2673 case OPT_TX_COMP_SUB_QUEUES:
2674 adapter->opt_tx_comp_sub_queues =
2675 be64_to_cpu(crq->query_capability.number);
2676 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2677 adapter->opt_tx_comp_sub_queues);
2678 break;
2679 case OPT_RX_COMP_QUEUES:
2680 adapter->opt_rx_comp_queues =
2681 be64_to_cpu(crq->query_capability.number);
2682 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2683 adapter->opt_rx_comp_queues);
2684 break;
2685 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2686 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2687 be64_to_cpu(crq->query_capability.number);
2688 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2689 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2690 break;
2691 case OPT_TX_ENTRIES_PER_SUBCRQ:
2692 adapter->opt_tx_entries_per_subcrq =
2693 be64_to_cpu(crq->query_capability.number);
2694 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2695 adapter->opt_tx_entries_per_subcrq);
2696 break;
2697 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2698 adapter->opt_rxba_entries_per_subcrq =
2699 be64_to_cpu(crq->query_capability.number);
2700 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2701 adapter->opt_rxba_entries_per_subcrq);
2702 break;
2703 case TX_RX_DESC_REQ:
2704 adapter->tx_rx_desc_req = crq->query_capability.number;
2705 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2706 adapter->tx_rx_desc_req);
2707 break;
2708
2709 default:
2710 netdev_err(netdev, "Got invalid cap rsp %d\n",
2711 crq->query_capability.capability);
2712 }
2713
2714 out:
2715 if (atomic_read(&adapter->running_cap_queries) == 0)
2716 init_sub_crqs(adapter, 0);
2717 /* We're done querying the capabilities, initialize sub-crqs */
2718 }
2719
2720 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2721 struct ibmvnic_adapter *adapter)
2722 {
2723 u8 correlator = crq->control_ras_rsp.correlator;
2724 struct device *dev = &adapter->vdev->dev;
2725 bool found = false;
2726 int i;
2727
2728 if (crq->control_ras_rsp.rc.code) {
2729 dev_warn(dev, "Control ras failed rc=%d\n",
2730 crq->control_ras_rsp.rc.code);
2731 return;
2732 }
2733
2734 for (i = 0; i < adapter->ras_comp_num; i++) {
2735 if (adapter->ras_comps[i].correlator == correlator) {
2736 found = true;
2737 break;
2738 }
2739 }
2740
2741 if (!found) {
2742 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2743 return;
2744 }
2745
2746 switch (crq->control_ras_rsp.op) {
2747 case IBMVNIC_TRACE_LEVEL:
2748 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2749 break;
2750 case IBMVNIC_ERROR_LEVEL:
2751 adapter->ras_comps[i].error_check_level =
2752 crq->control_ras.level;
2753 break;
2754 case IBMVNIC_TRACE_PAUSE:
2755 adapter->ras_comp_int[i].paused = 1;
2756 break;
2757 case IBMVNIC_TRACE_RESUME:
2758 adapter->ras_comp_int[i].paused = 0;
2759 break;
2760 case IBMVNIC_TRACE_ON:
2761 adapter->ras_comps[i].trace_on = 1;
2762 break;
2763 case IBMVNIC_TRACE_OFF:
2764 adapter->ras_comps[i].trace_on = 0;
2765 break;
2766 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2767 /* trace_buff_sz is 3 bytes, stuff it into an int */
2768 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2769 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2770 crq->control_ras_rsp.trace_buff_sz[0];
2771 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2772 crq->control_ras_rsp.trace_buff_sz[1];
2773 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2774 crq->control_ras_rsp.trace_buff_sz[2];
2775 break;
2776 default:
2777 dev_err(dev, "invalid op %d on control_ras_rsp",
2778 crq->control_ras_rsp.op);
2779 }
2780 }
2781
2782 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2783 loff_t *ppos)
2784 {
2785 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2786 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2787 struct device *dev = &adapter->vdev->dev;
2788 struct ibmvnic_fw_trace_entry *trace;
2789 int num = ras_comp_int->num;
2790 union ibmvnic_crq crq;
2791 dma_addr_t trace_tok;
2792
2793 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2794 return 0;
2795
2796 trace =
2797 dma_alloc_coherent(dev,
2798 be32_to_cpu(adapter->ras_comps[num].
2799 trace_buff_size), &trace_tok,
2800 GFP_KERNEL);
2801 if (!trace) {
2802 dev_err(dev, "Couldn't alloc trace buffer\n");
2803 return 0;
2804 }
2805
2806 memset(&crq, 0, sizeof(crq));
2807 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2808 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2809 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2810 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2811 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2812 ibmvnic_send_crq(adapter, &crq);
2813
2814 init_completion(&adapter->fw_done);
2815 wait_for_completion(&adapter->fw_done);
2816
2817 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2818 len =
2819 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2820 *ppos;
2821
2822 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2823
2824 dma_free_coherent(dev,
2825 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2826 trace, trace_tok);
2827 *ppos += len;
2828 return len;
2829 }
2830
2831 static const struct file_operations trace_ops = {
2832 .owner = THIS_MODULE,
2833 .open = simple_open,
2834 .read = trace_read,
2835 };
2836
2837 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2838 loff_t *ppos)
2839 {
2840 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2841 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2842 int num = ras_comp_int->num;
2843 char buff[5]; /* 1 or 0 plus \n and \0 */
2844 int size;
2845
2846 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2847
2848 if (*ppos >= size)
2849 return 0;
2850
2851 copy_to_user(user_buf, buff, size);
2852 *ppos += size;
2853 return size;
2854 }
2855
2856 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2857 size_t len, loff_t *ppos)
2858 {
2859 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2860 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2861 int num = ras_comp_int->num;
2862 union ibmvnic_crq crq;
2863 unsigned long val;
2864 char buff[9]; /* decimal max int plus \n and \0 */
2865
2866 copy_from_user(buff, user_buf, sizeof(buff));
2867 val = kstrtoul(buff, 10, NULL);
2868
2869 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2870
2871 memset(&crq, 0, sizeof(crq));
2872 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2873 crq.control_ras.cmd = CONTROL_RAS;
2874 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2875 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2876 ibmvnic_send_crq(adapter, &crq);
2877
2878 return len;
2879 }
2880
2881 static const struct file_operations paused_ops = {
2882 .owner = THIS_MODULE,
2883 .open = simple_open,
2884 .read = paused_read,
2885 .write = paused_write,
2886 };
2887
2888 static ssize_t tracing_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]; /* 1 or 0 plus \n and \0 */
2895 int size;
2896
2897 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
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 tracing_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 memset(&crq, 0, sizeof(crq));
2921 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2922 crq.control_ras.cmd = CONTROL_RAS;
2923 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2924 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2925
2926 return len;
2927 }
2928
2929 static const struct file_operations tracing_ops = {
2930 .owner = THIS_MODULE,
2931 .open = simple_open,
2932 .read = tracing_read,
2933 .write = tracing_write,
2934 };
2935
2936 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2937 size_t len, loff_t *ppos)
2938 {
2939 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2940 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2941 int num = ras_comp_int->num;
2942 char buff[5]; /* decimal max char plus \n and \0 */
2943 int size;
2944
2945 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2946
2947 if (*ppos >= size)
2948 return 0;
2949
2950 copy_to_user(user_buf, buff, size);
2951 *ppos += size;
2952 return size;
2953 }
2954
2955 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2956 size_t len, loff_t *ppos)
2957 {
2958 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2959 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2960 int num = ras_comp_int->num;
2961 union ibmvnic_crq crq;
2962 unsigned long val;
2963 char buff[9]; /* decimal max int plus \n and \0 */
2964
2965 copy_from_user(buff, user_buf, sizeof(buff));
2966 val = kstrtoul(buff, 10, NULL);
2967
2968 if (val > 9)
2969 val = 9;
2970
2971 memset(&crq, 0, sizeof(crq));
2972 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2973 crq.control_ras.cmd = CONTROL_RAS;
2974 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2975 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2976 crq.control_ras.level = val;
2977 ibmvnic_send_crq(adapter, &crq);
2978
2979 return len;
2980 }
2981
2982 static const struct file_operations error_level_ops = {
2983 .owner = THIS_MODULE,
2984 .open = simple_open,
2985 .read = error_level_read,
2986 .write = error_level_write,
2987 };
2988
2989 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2990 size_t len, loff_t *ppos)
2991 {
2992 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2993 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2994 int num = ras_comp_int->num;
2995 char buff[5]; /* decimal max char plus \n and \0 */
2996 int size;
2997
2998 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2999 if (*ppos >= size)
3000 return 0;
3001
3002 copy_to_user(user_buf, buff, size);
3003 *ppos += size;
3004 return size;
3005 }
3006
3007 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3008 size_t len, loff_t *ppos)
3009 {
3010 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3011 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3012 union ibmvnic_crq crq;
3013 unsigned long val;
3014 char buff[9]; /* decimal max int plus \n and \0 */
3015
3016 copy_from_user(buff, user_buf, sizeof(buff));
3017 val = kstrtoul(buff, 10, NULL);
3018 if (val > 9)
3019 val = 9;
3020
3021 memset(&crq, 0, sizeof(crq));
3022 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3023 crq.control_ras.cmd = CONTROL_RAS;
3024 crq.control_ras.correlator =
3025 adapter->ras_comps[ras_comp_int->num].correlator;
3026 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3027 crq.control_ras.level = val;
3028 ibmvnic_send_crq(adapter, &crq);
3029
3030 return len;
3031 }
3032
3033 static const struct file_operations trace_level_ops = {
3034 .owner = THIS_MODULE,
3035 .open = simple_open,
3036 .read = trace_level_read,
3037 .write = trace_level_write,
3038 };
3039
3040 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3041 size_t len, loff_t *ppos)
3042 {
3043 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3044 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3045 int num = ras_comp_int->num;
3046 char buff[9]; /* decimal max int plus \n and \0 */
3047 int size;
3048
3049 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3050 if (*ppos >= size)
3051 return 0;
3052
3053 copy_to_user(user_buf, buff, size);
3054 *ppos += size;
3055 return size;
3056 }
3057
3058 static ssize_t trace_buff_size_write(struct file *file,
3059 const char __user *user_buf, size_t len,
3060 loff_t *ppos)
3061 {
3062 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3063 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3064 union ibmvnic_crq crq;
3065 unsigned long val;
3066 char buff[9]; /* decimal max int plus \n and \0 */
3067
3068 copy_from_user(buff, user_buf, sizeof(buff));
3069 val = kstrtoul(buff, 10, NULL);
3070
3071 memset(&crq, 0, sizeof(crq));
3072 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3073 crq.control_ras.cmd = CONTROL_RAS;
3074 crq.control_ras.correlator =
3075 adapter->ras_comps[ras_comp_int->num].correlator;
3076 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3077 /* trace_buff_sz is 3 bytes, stuff an int into it */
3078 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3079 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3080 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3081 ibmvnic_send_crq(adapter, &crq);
3082
3083 return len;
3084 }
3085
3086 static const struct file_operations trace_size_ops = {
3087 .owner = THIS_MODULE,
3088 .open = simple_open,
3089 .read = trace_buff_size_read,
3090 .write = trace_buff_size_write,
3091 };
3092
3093 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3094 struct ibmvnic_adapter *adapter)
3095 {
3096 struct device *dev = &adapter->vdev->dev;
3097 struct dentry *dir_ent;
3098 struct dentry *ent;
3099 int i;
3100
3101 debugfs_remove_recursive(adapter->ras_comps_ent);
3102
3103 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3104 adapter->debugfs_dir);
3105 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3106 dev_info(dev, "debugfs create ras_comps dir failed\n");
3107 return;
3108 }
3109
3110 for (i = 0; i < adapter->ras_comp_num; i++) {
3111 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3112 adapter->ras_comps_ent);
3113 if (!dir_ent || IS_ERR(dir_ent)) {
3114 dev_info(dev, "debugfs create %s dir failed\n",
3115 adapter->ras_comps[i].name);
3116 continue;
3117 }
3118
3119 adapter->ras_comp_int[i].adapter = adapter;
3120 adapter->ras_comp_int[i].num = i;
3121 adapter->ras_comp_int[i].desc_blob.data =
3122 &adapter->ras_comps[i].description;
3123 adapter->ras_comp_int[i].desc_blob.size =
3124 sizeof(adapter->ras_comps[i].description);
3125
3126 /* Don't need to remember the dentry's because the debugfs dir
3127 * gets removed recursively
3128 */
3129 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3130 &adapter->ras_comp_int[i].desc_blob);
3131 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3132 dir_ent, &adapter->ras_comp_int[i],
3133 &trace_size_ops);
3134 ent = debugfs_create_file("trace_level",
3135 S_IRUGO |
3136 (adapter->ras_comps[i].trace_level !=
3137 0xFF ? S_IWUSR : 0),
3138 dir_ent, &adapter->ras_comp_int[i],
3139 &trace_level_ops);
3140 ent = debugfs_create_file("error_level",
3141 S_IRUGO |
3142 (adapter->
3143 ras_comps[i].error_check_level !=
3144 0xFF ? S_IWUSR : 0),
3145 dir_ent, &adapter->ras_comp_int[i],
3146 &trace_level_ops);
3147 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3148 dir_ent, &adapter->ras_comp_int[i],
3149 &tracing_ops);
3150 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3151 dir_ent, &adapter->ras_comp_int[i],
3152 &paused_ops);
3153 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3154 &adapter->ras_comp_int[i],
3155 &trace_ops);
3156 }
3157 }
3158
3159 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3160 struct ibmvnic_adapter *adapter)
3161 {
3162 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3163 struct device *dev = &adapter->vdev->dev;
3164 union ibmvnic_crq newcrq;
3165
3166 adapter->ras_comps = dma_alloc_coherent(dev, len,
3167 &adapter->ras_comps_tok,
3168 GFP_KERNEL);
3169 if (!adapter->ras_comps) {
3170 if (!firmware_has_feature(FW_FEATURE_CMO))
3171 dev_err(dev, "Couldn't alloc fw comps buffer\n");
3172 return;
3173 }
3174
3175 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3176 sizeof(struct ibmvnic_fw_comp_internal),
3177 GFP_KERNEL);
3178 if (!adapter->ras_comp_int)
3179 dma_free_coherent(dev, len, adapter->ras_comps,
3180 adapter->ras_comps_tok);
3181
3182 memset(&newcrq, 0, sizeof(newcrq));
3183 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3184 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3185 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3186 newcrq.request_ras_comps.len = cpu_to_be32(len);
3187 ibmvnic_send_crq(adapter, &newcrq);
3188 }
3189
3190 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3191 {
3192 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3193 struct device *dev = &adapter->vdev->dev;
3194 struct ibmvnic_error_buff *error_buff, *tmp2;
3195 unsigned long flags;
3196 unsigned long flags2;
3197
3198 spin_lock_irqsave(&adapter->inflight_lock, flags);
3199 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3200 switch (inflight_cmd->crq.generic.cmd) {
3201 case LOGIN:
3202 dma_unmap_single(dev, adapter->login_buf_token,
3203 adapter->login_buf_sz,
3204 DMA_BIDIRECTIONAL);
3205 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3206 adapter->login_rsp_buf_sz,
3207 DMA_BIDIRECTIONAL);
3208 kfree(adapter->login_rsp_buf);
3209 kfree(adapter->login_buf);
3210 break;
3211 case REQUEST_DUMP:
3212 complete(&adapter->fw_done);
3213 break;
3214 case REQUEST_ERROR_INFO:
3215 spin_lock_irqsave(&adapter->error_list_lock, flags2);
3216 list_for_each_entry_safe(error_buff, tmp2,
3217 &adapter->errors, list) {
3218 dma_unmap_single(dev, error_buff->dma,
3219 error_buff->len,
3220 DMA_FROM_DEVICE);
3221 kfree(error_buff->buff);
3222 list_del(&error_buff->list);
3223 kfree(error_buff);
3224 }
3225 spin_unlock_irqrestore(&adapter->error_list_lock,
3226 flags2);
3227 break;
3228 }
3229 list_del(&inflight_cmd->list);
3230 kfree(inflight_cmd);
3231 }
3232 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3233 }
3234
3235 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3236 struct ibmvnic_adapter *adapter)
3237 {
3238 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3239 struct net_device *netdev = adapter->netdev;
3240 struct device *dev = &adapter->vdev->dev;
3241 long rc;
3242
3243 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3244 ((unsigned long int *)crq)[0],
3245 ((unsigned long int *)crq)[1]);
3246 switch (gen_crq->first) {
3247 case IBMVNIC_CRQ_INIT_RSP:
3248 switch (gen_crq->cmd) {
3249 case IBMVNIC_CRQ_INIT:
3250 dev_info(dev, "Partner initialized\n");
3251 /* Send back a response */
3252 rc = ibmvnic_send_crq_init_complete(adapter);
3253 if (!rc)
3254 schedule_work(&adapter->vnic_crq_init);
3255 else
3256 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3257 break;
3258 case IBMVNIC_CRQ_INIT_COMPLETE:
3259 dev_info(dev, "Partner initialization complete\n");
3260 send_version_xchg(adapter);
3261 break;
3262 default:
3263 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3264 }
3265 return;
3266 case IBMVNIC_CRQ_XPORT_EVENT:
3267 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3268 dev_info(dev, "Re-enabling adapter\n");
3269 adapter->migrated = true;
3270 ibmvnic_free_inflight(adapter);
3271 release_sub_crqs(adapter);
3272 rc = ibmvnic_reenable_crq_queue(adapter);
3273 if (rc)
3274 dev_err(dev, "Error after enable rc=%ld\n", rc);
3275 adapter->migrated = false;
3276 rc = ibmvnic_send_crq_init(adapter);
3277 if (rc)
3278 dev_err(dev, "Error sending init rc=%ld\n", rc);
3279 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3280 dev_info(dev, "Backing device failover detected\n");
3281 netif_carrier_off(netdev);
3282 adapter->failover = true;
3283 } else {
3284 /* The adapter lost the connection */
3285 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3286 gen_crq->cmd);
3287 ibmvnic_free_inflight(adapter);
3288 release_sub_crqs(adapter);
3289 }
3290 return;
3291 case IBMVNIC_CRQ_CMD_RSP:
3292 break;
3293 default:
3294 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3295 gen_crq->first);
3296 return;
3297 }
3298
3299 switch (gen_crq->cmd) {
3300 case VERSION_EXCHANGE_RSP:
3301 rc = crq->version_exchange_rsp.rc.code;
3302 if (rc) {
3303 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3304 break;
3305 }
3306 dev_info(dev, "Partner protocol version is %d\n",
3307 crq->version_exchange_rsp.version);
3308 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3309 ibmvnic_version)
3310 ibmvnic_version =
3311 be16_to_cpu(crq->version_exchange_rsp.version);
3312 send_cap_queries(adapter);
3313 break;
3314 case QUERY_CAPABILITY_RSP:
3315 handle_query_cap_rsp(crq, adapter);
3316 break;
3317 case QUERY_MAP_RSP:
3318 handle_query_map_rsp(crq, adapter);
3319 break;
3320 case REQUEST_MAP_RSP:
3321 handle_request_map_rsp(crq, adapter);
3322 break;
3323 case REQUEST_UNMAP_RSP:
3324 handle_request_unmap_rsp(crq, adapter);
3325 break;
3326 case REQUEST_CAPABILITY_RSP:
3327 handle_request_cap_rsp(crq, adapter);
3328 break;
3329 case LOGIN_RSP:
3330 netdev_dbg(netdev, "Got Login Response\n");
3331 handle_login_rsp(crq, adapter);
3332 break;
3333 case LOGICAL_LINK_STATE_RSP:
3334 netdev_dbg(netdev, "Got Logical Link State Response\n");
3335 adapter->logical_link_state =
3336 crq->logical_link_state_rsp.link_state;
3337 break;
3338 case LINK_STATE_INDICATION:
3339 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3340 adapter->phys_link_state =
3341 crq->link_state_indication.phys_link_state;
3342 adapter->logical_link_state =
3343 crq->link_state_indication.logical_link_state;
3344 break;
3345 case CHANGE_MAC_ADDR_RSP:
3346 netdev_dbg(netdev, "Got MAC address change Response\n");
3347 handle_change_mac_rsp(crq, adapter);
3348 break;
3349 case ERROR_INDICATION:
3350 netdev_dbg(netdev, "Got Error Indication\n");
3351 handle_error_indication(crq, adapter);
3352 break;
3353 case REQUEST_ERROR_RSP:
3354 netdev_dbg(netdev, "Got Error Detail Response\n");
3355 handle_error_info_rsp(crq, adapter);
3356 break;
3357 case REQUEST_STATISTICS_RSP:
3358 netdev_dbg(netdev, "Got Statistics Response\n");
3359 complete(&adapter->stats_done);
3360 break;
3361 case REQUEST_DUMP_SIZE_RSP:
3362 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3363 handle_dump_size_rsp(crq, adapter);
3364 break;
3365 case REQUEST_DUMP_RSP:
3366 netdev_dbg(netdev, "Got Request Dump Response\n");
3367 complete(&adapter->fw_done);
3368 break;
3369 case QUERY_IP_OFFLOAD_RSP:
3370 netdev_dbg(netdev, "Got Query IP offload Response\n");
3371 handle_query_ip_offload_rsp(adapter);
3372 break;
3373 case MULTICAST_CTRL_RSP:
3374 netdev_dbg(netdev, "Got multicast control Response\n");
3375 break;
3376 case CONTROL_IP_OFFLOAD_RSP:
3377 netdev_dbg(netdev, "Got Control IP offload Response\n");
3378 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3379 sizeof(adapter->ip_offload_ctrl),
3380 DMA_TO_DEVICE);
3381 /* We're done with the queries, perform the login */
3382 send_login(adapter);
3383 break;
3384 case REQUEST_RAS_COMP_NUM_RSP:
3385 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3386 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3387 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3388 break;
3389 }
3390 adapter->ras_comp_num =
3391 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3392 handle_request_ras_comp_num_rsp(crq, adapter);
3393 break;
3394 case REQUEST_RAS_COMPS_RSP:
3395 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3396 handle_request_ras_comps_rsp(crq, adapter);
3397 break;
3398 case CONTROL_RAS_RSP:
3399 netdev_dbg(netdev, "Got Control RAS Response\n");
3400 handle_control_ras_rsp(crq, adapter);
3401 break;
3402 case COLLECT_FW_TRACE_RSP:
3403 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3404 complete(&adapter->fw_done);
3405 break;
3406 default:
3407 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3408 gen_crq->cmd);
3409 }
3410 }
3411
3412 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3413 {
3414 struct ibmvnic_adapter *adapter = instance;
3415 struct ibmvnic_crq_queue *queue = &adapter->crq;
3416 struct vio_dev *vdev = adapter->vdev;
3417 union ibmvnic_crq *crq;
3418 unsigned long flags;
3419 bool done = false;
3420
3421 spin_lock_irqsave(&queue->lock, flags);
3422 vio_disable_interrupts(vdev);
3423 while (!done) {
3424 /* Pull all the valid messages off the CRQ */
3425 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3426 ibmvnic_handle_crq(crq, adapter);
3427 crq->generic.first = 0;
3428 }
3429 vio_enable_interrupts(vdev);
3430 crq = ibmvnic_next_crq(adapter);
3431 if (crq) {
3432 vio_disable_interrupts(vdev);
3433 ibmvnic_handle_crq(crq, adapter);
3434 crq->generic.first = 0;
3435 } else {
3436 done = true;
3437 }
3438 }
3439 spin_unlock_irqrestore(&queue->lock, flags);
3440 return IRQ_HANDLED;
3441 }
3442
3443 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3444 {
3445 struct vio_dev *vdev = adapter->vdev;
3446 int rc;
3447
3448 do {
3449 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3450 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3451
3452 if (rc)
3453 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3454
3455 return rc;
3456 }
3457
3458 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3459 {
3460 struct ibmvnic_crq_queue *crq = &adapter->crq;
3461 struct device *dev = &adapter->vdev->dev;
3462 struct vio_dev *vdev = adapter->vdev;
3463 int rc;
3464
3465 /* Close the CRQ */
3466 do {
3467 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3468 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3469
3470 /* Clean out the queue */
3471 memset(crq->msgs, 0, PAGE_SIZE);
3472 crq->cur = 0;
3473
3474 /* And re-open it again */
3475 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3476 crq->msg_token, PAGE_SIZE);
3477
3478 if (rc == H_CLOSED)
3479 /* Adapter is good, but other end is not ready */
3480 dev_warn(dev, "Partner adapter not ready\n");
3481 else if (rc != 0)
3482 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3483
3484 return rc;
3485 }
3486
3487 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3488 {
3489 struct ibmvnic_crq_queue *crq = &adapter->crq;
3490 struct vio_dev *vdev = adapter->vdev;
3491 long rc;
3492
3493 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3494 free_irq(vdev->irq, adapter);
3495 do {
3496 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3497 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3500 DMA_BIDIRECTIONAL);
3501 free_page((unsigned long)crq->msgs);
3502 }
3503
3504 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3505 {
3506 struct ibmvnic_crq_queue *crq = &adapter->crq;
3507 struct device *dev = &adapter->vdev->dev;
3508 struct vio_dev *vdev = adapter->vdev;
3509 int rc, retrc = -ENOMEM;
3510
3511 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3512 /* Should we allocate more than one page? */
3513
3514 if (!crq->msgs)
3515 return -ENOMEM;
3516
3517 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3518 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3519 DMA_BIDIRECTIONAL);
3520 if (dma_mapping_error(dev, crq->msg_token))
3521 goto map_failed;
3522
3523 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3524 crq->msg_token, PAGE_SIZE);
3525
3526 if (rc == H_RESOURCE)
3527 /* maybe kexecing and resource is busy. try a reset */
3528 rc = ibmvnic_reset_crq(adapter);
3529 retrc = rc;
3530
3531 if (rc == H_CLOSED) {
3532 dev_warn(dev, "Partner adapter not ready\n");
3533 } else if (rc) {
3534 dev_warn(dev, "Error %d opening adapter\n", rc);
3535 goto reg_crq_failed;
3536 }
3537
3538 retrc = 0;
3539
3540 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3541 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3542 adapter);
3543 if (rc) {
3544 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3545 vdev->irq, rc);
3546 goto req_irq_failed;
3547 }
3548
3549 rc = vio_enable_interrupts(vdev);
3550 if (rc) {
3551 dev_err(dev, "Error %d enabling interrupts\n", rc);
3552 goto req_irq_failed;
3553 }
3554
3555 crq->cur = 0;
3556 spin_lock_init(&crq->lock);
3557
3558 return retrc;
3559
3560 req_irq_failed:
3561 do {
3562 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3563 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3564 reg_crq_failed:
3565 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3566 map_failed:
3567 free_page((unsigned long)crq->msgs);
3568 return retrc;
3569 }
3570
3571 /* debugfs for dump */
3572 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3573 {
3574 struct net_device *netdev = seq->private;
3575 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3576 struct device *dev = &adapter->vdev->dev;
3577 union ibmvnic_crq crq;
3578
3579 memset(&crq, 0, sizeof(crq));
3580 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3581 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3582 ibmvnic_send_crq(adapter, &crq);
3583
3584 init_completion(&adapter->fw_done);
3585 wait_for_completion(&adapter->fw_done);
3586
3587 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3588
3589 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3590 DMA_BIDIRECTIONAL);
3591
3592 kfree(adapter->dump_data);
3593
3594 return 0;
3595 }
3596
3597 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3598 {
3599 return single_open(file, ibmvnic_dump_show, inode->i_private);
3600 }
3601
3602 static const struct file_operations ibmvnic_dump_ops = {
3603 .owner = THIS_MODULE,
3604 .open = ibmvnic_dump_open,
3605 .read = seq_read,
3606 .llseek = seq_lseek,
3607 .release = single_release,
3608 };
3609
3610 static void handle_crq_init_rsp(struct work_struct *work)
3611 {
3612 struct ibmvnic_adapter *adapter = container_of(work,
3613 struct ibmvnic_adapter,
3614 vnic_crq_init);
3615 struct device *dev = &adapter->vdev->dev;
3616 struct net_device *netdev = adapter->netdev;
3617 unsigned long timeout = msecs_to_jiffies(30000);
3618 bool restart = false;
3619 int rc;
3620
3621 if (adapter->failover) {
3622 release_sub_crqs(adapter);
3623 if (netif_running(netdev)) {
3624 netif_tx_disable(netdev);
3625 ibmvnic_close(netdev);
3626 restart = true;
3627 }
3628 }
3629
3630 send_version_xchg(adapter);
3631 reinit_completion(&adapter->init_done);
3632 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3633 dev_err(dev, "Passive init timeout\n");
3634 goto task_failed;
3635 }
3636
3637 do {
3638 if (adapter->renegotiate) {
3639 adapter->renegotiate = false;
3640 release_sub_crqs_no_irqs(adapter);
3641 send_cap_queries(adapter);
3642
3643 reinit_completion(&adapter->init_done);
3644 if (!wait_for_completion_timeout(&adapter->init_done,
3645 timeout)) {
3646 dev_err(dev, "Passive init timeout\n");
3647 goto task_failed;
3648 }
3649 }
3650 } while (adapter->renegotiate);
3651 rc = init_sub_crq_irqs(adapter);
3652
3653 if (rc)
3654 goto task_failed;
3655
3656 netdev->real_num_tx_queues = adapter->req_tx_queues;
3657
3658 if (adapter->failover) {
3659 adapter->failover = false;
3660 if (restart) {
3661 rc = ibmvnic_open(netdev);
3662 if (rc)
3663 goto restart_failed;
3664 }
3665 netif_carrier_on(netdev);
3666 return;
3667 }
3668
3669 rc = register_netdev(netdev);
3670 if (rc) {
3671 dev_err(dev,
3672 "failed to register netdev rc=%d\n", rc);
3673 goto register_failed;
3674 }
3675 dev_info(dev, "ibmvnic registered\n");
3676
3677 return;
3678
3679 restart_failed:
3680 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3681 register_failed:
3682 release_sub_crqs(adapter);
3683 task_failed:
3684 dev_err(dev, "Passive initialization was not successful\n");
3685 }
3686
3687 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3688 {
3689 unsigned long timeout = msecs_to_jiffies(30000);
3690 struct ibmvnic_adapter *adapter;
3691 struct net_device *netdev;
3692 unsigned char *mac_addr_p;
3693 struct dentry *ent;
3694 char buf[16]; /* debugfs name buf */
3695 int rc;
3696
3697 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3698 dev->unit_address);
3699
3700 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3701 VETH_MAC_ADDR, NULL);
3702 if (!mac_addr_p) {
3703 dev_err(&dev->dev,
3704 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3705 __FILE__, __LINE__);
3706 return 0;
3707 }
3708
3709 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3710 IBMVNIC_MAX_TX_QUEUES);
3711 if (!netdev)
3712 return -ENOMEM;
3713
3714 adapter = netdev_priv(netdev);
3715 dev_set_drvdata(&dev->dev, netdev);
3716 adapter->vdev = dev;
3717 adapter->netdev = netdev;
3718 adapter->failover = false;
3719
3720 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3721 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3722 netdev->irq = dev->irq;
3723 netdev->netdev_ops = &ibmvnic_netdev_ops;
3724 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3725 SET_NETDEV_DEV(netdev, &dev->dev);
3726
3727 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3728
3729 spin_lock_init(&adapter->stats_lock);
3730
3731 rc = ibmvnic_init_crq_queue(adapter);
3732 if (rc) {
3733 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3734 goto free_netdev;
3735 }
3736
3737 INIT_LIST_HEAD(&adapter->errors);
3738 INIT_LIST_HEAD(&adapter->inflight);
3739 spin_lock_init(&adapter->error_list_lock);
3740 spin_lock_init(&adapter->inflight_lock);
3741
3742 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3743 sizeof(struct ibmvnic_statistics),
3744 DMA_FROM_DEVICE);
3745 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3746 if (!firmware_has_feature(FW_FEATURE_CMO))
3747 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3748 rc = -ENOMEM;
3749 goto free_crq;
3750 }
3751
3752 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3753 ent = debugfs_create_dir(buf, NULL);
3754 if (!ent || IS_ERR(ent)) {
3755 dev_info(&dev->dev, "debugfs create directory failed\n");
3756 adapter->debugfs_dir = NULL;
3757 } else {
3758 adapter->debugfs_dir = ent;
3759 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3760 netdev, &ibmvnic_dump_ops);
3761 if (!ent || IS_ERR(ent)) {
3762 dev_info(&dev->dev,
3763 "debugfs create dump file failed\n");
3764 adapter->debugfs_dump = NULL;
3765 } else {
3766 adapter->debugfs_dump = ent;
3767 }
3768 }
3769 ibmvnic_send_crq_init(adapter);
3770
3771 init_completion(&adapter->init_done);
3772 if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3773 return 0;
3774
3775 do {
3776 if (adapter->renegotiate) {
3777 adapter->renegotiate = false;
3778 release_sub_crqs_no_irqs(adapter);
3779 send_cap_queries(adapter);
3780
3781 reinit_completion(&adapter->init_done);
3782 if (!wait_for_completion_timeout(&adapter->init_done,
3783 timeout))
3784 return 0;
3785 }
3786 } while (adapter->renegotiate);
3787
3788 rc = init_sub_crq_irqs(adapter);
3789 if (rc) {
3790 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3791 goto free_debugfs;
3792 }
3793
3794 netdev->real_num_tx_queues = adapter->req_tx_queues;
3795
3796 rc = register_netdev(netdev);
3797 if (rc) {
3798 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3799 goto free_sub_crqs;
3800 }
3801 dev_info(&dev->dev, "ibmvnic registered\n");
3802
3803 return 0;
3804
3805 free_sub_crqs:
3806 release_sub_crqs(adapter);
3807 free_debugfs:
3808 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3809 debugfs_remove_recursive(adapter->debugfs_dir);
3810 free_crq:
3811 ibmvnic_release_crq_queue(adapter);
3812 free_netdev:
3813 free_netdev(netdev);
3814 return rc;
3815 }
3816
3817 static int ibmvnic_remove(struct vio_dev *dev)
3818 {
3819 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3820 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3821
3822 unregister_netdev(netdev);
3823
3824 release_sub_crqs(adapter);
3825
3826 ibmvnic_release_crq_queue(adapter);
3827
3828 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3829 debugfs_remove_recursive(adapter->debugfs_dir);
3830
3831 if (adapter->ras_comps)
3832 dma_free_coherent(&dev->dev,
3833 adapter->ras_comp_num *
3834 sizeof(struct ibmvnic_fw_component),
3835 adapter->ras_comps, adapter->ras_comps_tok);
3836
3837 kfree(adapter->ras_comp_int);
3838
3839 free_netdev(netdev);
3840 dev_set_drvdata(&dev->dev, NULL);
3841
3842 return 0;
3843 }
3844
3845 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3846 {
3847 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3848 struct ibmvnic_adapter *adapter;
3849 struct iommu_table *tbl;
3850 unsigned long ret = 0;
3851 int i;
3852
3853 tbl = get_iommu_table_base(&vdev->dev);
3854
3855 /* netdev inits at probe time along with the structures we need below*/
3856 if (!netdev)
3857 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3858
3859 adapter = netdev_priv(netdev);
3860
3861 ret += PAGE_SIZE; /* the crq message queue */
3862 ret += adapter->bounce_buffer_size;
3863 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3864
3865 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3866 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3867
3868 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3869 i++)
3870 ret += adapter->rx_pool[i].size *
3871 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3872
3873 return ret;
3874 }
3875
3876 static int ibmvnic_resume(struct device *dev)
3877 {
3878 struct net_device *netdev = dev_get_drvdata(dev);
3879 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3880 int i;
3881
3882 /* kick the interrupt handlers just in case we lost an interrupt */
3883 for (i = 0; i < adapter->req_rx_queues; i++)
3884 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3885 adapter->rx_scrq[i]);
3886
3887 return 0;
3888 }
3889
3890 static struct vio_device_id ibmvnic_device_table[] = {
3891 {"network", "IBM,vnic"},
3892 {"", "" }
3893 };
3894 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3895
3896 static const struct dev_pm_ops ibmvnic_pm_ops = {
3897 .resume = ibmvnic_resume
3898 };
3899
3900 static struct vio_driver ibmvnic_driver = {
3901 .id_table = ibmvnic_device_table,
3902 .probe = ibmvnic_probe,
3903 .remove = ibmvnic_remove,
3904 .get_desired_dma = ibmvnic_get_desired_dma,
3905 .name = ibmvnic_driver_name,
3906 .pm = &ibmvnic_pm_ops,
3907 };
3908
3909 /* module functions */
3910 static int __init ibmvnic_module_init(void)
3911 {
3912 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3913 IBMVNIC_DRIVER_VERSION);
3914
3915 return vio_register_driver(&ibmvnic_driver);
3916 }
3917
3918 static void __exit ibmvnic_module_exit(void)
3919 {
3920 vio_unregister_driver(&ibmvnic_driver);
3921 }
3922
3923 module_init(ibmvnic_module_init);
3924 module_exit(ibmvnic_module_exit);
Linux kernel - Deliverables
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