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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/debugfs.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
73 #include <asm/vio.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/seq_file.h>
78 #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 void ibmvnic_tx_timeout(struct net_device *dev)
906 {
907 struct ibmvnic_adapter *adapter = netdev_priv(dev);
908 int rc;
909
910 /* Adapter timed out, resetting it */
911 release_sub_crqs(adapter);
912 rc = ibmvnic_reset_crq(adapter);
913 if (rc)
914 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
915 else
916 ibmvnic_send_crq_init(adapter);
917 }
918
919 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
920 struct ibmvnic_rx_buff *rx_buff)
921 {
922 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
923
924 rx_buff->skb = NULL;
925
926 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
927 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
928
929 atomic_dec(&pool->available);
930 }
931
932 static int ibmvnic_poll(struct napi_struct *napi, int budget)
933 {
934 struct net_device *netdev = napi->dev;
935 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
936 int scrq_num = (int)(napi - adapter->napi);
937 int frames_processed = 0;
938 restart_poll:
939 while (frames_processed < budget) {
940 struct sk_buff *skb;
941 struct ibmvnic_rx_buff *rx_buff;
942 union sub_crq *next;
943 u32 length;
944 u16 offset;
945 u8 flags = 0;
946
947 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
948 break;
949 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
950 rx_buff =
951 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
952 rx_comp.correlator);
953 /* do error checking */
954 if (next->rx_comp.rc) {
955 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
956 /* free the entry */
957 next->rx_comp.first = 0;
958 remove_buff_from_pool(adapter, rx_buff);
959 break;
960 }
961
962 length = be32_to_cpu(next->rx_comp.len);
963 offset = be16_to_cpu(next->rx_comp.off_frame_data);
964 flags = next->rx_comp.flags;
965 skb = rx_buff->skb;
966 skb_copy_to_linear_data(skb, rx_buff->data + offset,
967 length);
968 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
969 /* free the entry */
970 next->rx_comp.first = 0;
971 remove_buff_from_pool(adapter, rx_buff);
972
973 skb_put(skb, length);
974 skb->protocol = eth_type_trans(skb, netdev);
975
976 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
977 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
978 skb->ip_summed = CHECKSUM_UNNECESSARY;
979 }
980
981 length = skb->len;
982 napi_gro_receive(napi, skb); /* send it up */
983 netdev->stats.rx_packets++;
984 netdev->stats.rx_bytes += length;
985 frames_processed++;
986 }
987 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
988
989 if (frames_processed < budget) {
990 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
991 napi_complete(napi);
992 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
993 napi_reschedule(napi)) {
994 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
995 goto restart_poll;
996 }
997 }
998 return frames_processed;
999 }
1000
1001 #ifdef CONFIG_NET_POLL_CONTROLLER
1002 static void ibmvnic_netpoll_controller(struct net_device *dev)
1003 {
1004 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1005 int i;
1006
1007 replenish_pools(netdev_priv(dev));
1008 for (i = 0; i < adapter->req_rx_queues; i++)
1009 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1010 adapter->rx_scrq[i]);
1011 }
1012 #endif
1013
1014 static const struct net_device_ops ibmvnic_netdev_ops = {
1015 .ndo_open = ibmvnic_open,
1016 .ndo_stop = ibmvnic_close,
1017 .ndo_start_xmit = ibmvnic_xmit,
1018 .ndo_set_rx_mode = ibmvnic_set_multi,
1019 .ndo_set_mac_address = ibmvnic_set_mac,
1020 .ndo_validate_addr = eth_validate_addr,
1021 .ndo_tx_timeout = ibmvnic_tx_timeout,
1022 #ifdef CONFIG_NET_POLL_CONTROLLER
1023 .ndo_poll_controller = ibmvnic_netpoll_controller,
1024 #endif
1025 };
1026
1027 /* ethtool functions */
1028
1029 static int ibmvnic_get_settings(struct net_device *netdev,
1030 struct ethtool_cmd *cmd)
1031 {
1032 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1033 SUPPORTED_FIBRE);
1034 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1035 ADVERTISED_FIBRE);
1036 ethtool_cmd_speed_set(cmd, SPEED_1000);
1037 cmd->duplex = DUPLEX_FULL;
1038 cmd->port = PORT_FIBRE;
1039 cmd->phy_address = 0;
1040 cmd->transceiver = XCVR_INTERNAL;
1041 cmd->autoneg = AUTONEG_ENABLE;
1042 cmd->maxtxpkt = 0;
1043 cmd->maxrxpkt = 1;
1044 return 0;
1045 }
1046
1047 static void ibmvnic_get_drvinfo(struct net_device *dev,
1048 struct ethtool_drvinfo *info)
1049 {
1050 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1051 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1052 }
1053
1054 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1055 {
1056 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1057
1058 return adapter->msg_enable;
1059 }
1060
1061 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1062 {
1063 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1064
1065 adapter->msg_enable = data;
1066 }
1067
1068 static u32 ibmvnic_get_link(struct net_device *netdev)
1069 {
1070 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1071
1072 /* Don't need to send a query because we request a logical link up at
1073 * init and then we wait for link state indications
1074 */
1075 return adapter->logical_link_state;
1076 }
1077
1078 static void ibmvnic_get_ringparam(struct net_device *netdev,
1079 struct ethtool_ringparam *ring)
1080 {
1081 ring->rx_max_pending = 0;
1082 ring->tx_max_pending = 0;
1083 ring->rx_mini_max_pending = 0;
1084 ring->rx_jumbo_max_pending = 0;
1085 ring->rx_pending = 0;
1086 ring->tx_pending = 0;
1087 ring->rx_mini_pending = 0;
1088 ring->rx_jumbo_pending = 0;
1089 }
1090
1091 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1092 {
1093 int i;
1094
1095 if (stringset != ETH_SS_STATS)
1096 return;
1097
1098 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1099 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1100 }
1101
1102 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1103 {
1104 switch (sset) {
1105 case ETH_SS_STATS:
1106 return ARRAY_SIZE(ibmvnic_stats);
1107 default:
1108 return -EOPNOTSUPP;
1109 }
1110 }
1111
1112 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1113 struct ethtool_stats *stats, u64 *data)
1114 {
1115 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1116 union ibmvnic_crq crq;
1117 int i;
1118
1119 memset(&crq, 0, sizeof(crq));
1120 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1121 crq.request_statistics.cmd = REQUEST_STATISTICS;
1122 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1123 crq.request_statistics.len =
1124 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1125 ibmvnic_send_crq(adapter, &crq);
1126
1127 /* Wait for data to be written */
1128 init_completion(&adapter->stats_done);
1129 wait_for_completion(&adapter->stats_done);
1130
1131 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1132 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1133 }
1134
1135 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1136 .get_settings = ibmvnic_get_settings,
1137 .get_drvinfo = ibmvnic_get_drvinfo,
1138 .get_msglevel = ibmvnic_get_msglevel,
1139 .set_msglevel = ibmvnic_set_msglevel,
1140 .get_link = ibmvnic_get_link,
1141 .get_ringparam = ibmvnic_get_ringparam,
1142 .get_strings = ibmvnic_get_strings,
1143 .get_sset_count = ibmvnic_get_sset_count,
1144 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1145 };
1146
1147 /* Routines for managing CRQs/sCRQs */
1148
1149 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1150 struct ibmvnic_sub_crq_queue *scrq)
1151 {
1152 struct device *dev = &adapter->vdev->dev;
1153 long rc;
1154
1155 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1156
1157 /* Close the sub-crqs */
1158 do {
1159 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1160 adapter->vdev->unit_address,
1161 scrq->crq_num);
1162 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1163
1164 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1165 DMA_BIDIRECTIONAL);
1166 free_pages((unsigned long)scrq->msgs, 2);
1167 kfree(scrq);
1168 }
1169
1170 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1171 *adapter)
1172 {
1173 struct device *dev = &adapter->vdev->dev;
1174 struct ibmvnic_sub_crq_queue *scrq;
1175 int rc;
1176
1177 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1178 if (!scrq)
1179 return NULL;
1180
1181 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1182 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1183 if (!scrq->msgs) {
1184 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1185 goto zero_page_failed;
1186 }
1187
1188 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1189 DMA_BIDIRECTIONAL);
1190 if (dma_mapping_error(dev, scrq->msg_token)) {
1191 dev_warn(dev, "Couldn't map crq queue messages page\n");
1192 goto map_failed;
1193 }
1194
1195 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1196 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1197
1198 if (rc == H_RESOURCE)
1199 rc = ibmvnic_reset_crq(adapter);
1200
1201 if (rc == H_CLOSED) {
1202 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1203 } else if (rc) {
1204 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1205 goto reg_failed;
1206 }
1207
1208 scrq->adapter = adapter;
1209 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1210 scrq->cur = 0;
1211 scrq->rx_skb_top = NULL;
1212 spin_lock_init(&scrq->lock);
1213
1214 netdev_dbg(adapter->netdev,
1215 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1216 scrq->crq_num, scrq->hw_irq, scrq->irq);
1217
1218 return scrq;
1219
1220 reg_failed:
1221 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1222 DMA_BIDIRECTIONAL);
1223 map_failed:
1224 free_pages((unsigned long)scrq->msgs, 2);
1225 zero_page_failed:
1226 kfree(scrq);
1227
1228 return NULL;
1229 }
1230
1231 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1232 {
1233 int i;
1234
1235 if (adapter->tx_scrq) {
1236 for (i = 0; i < adapter->req_tx_queues; i++)
1237 if (adapter->tx_scrq[i]) {
1238 free_irq(adapter->tx_scrq[i]->irq,
1239 adapter->tx_scrq[i]);
1240 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1241 release_sub_crq_queue(adapter,
1242 adapter->tx_scrq[i]);
1243 }
1244 adapter->tx_scrq = NULL;
1245 }
1246
1247 if (adapter->rx_scrq) {
1248 for (i = 0; i < adapter->req_rx_queues; i++)
1249 if (adapter->rx_scrq[i]) {
1250 free_irq(adapter->rx_scrq[i]->irq,
1251 adapter->rx_scrq[i]);
1252 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1253 release_sub_crq_queue(adapter,
1254 adapter->rx_scrq[i]);
1255 }
1256 adapter->rx_scrq = NULL;
1257 }
1258
1259 adapter->requested_caps = 0;
1260 }
1261
1262 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1263 {
1264 int i;
1265
1266 if (adapter->tx_scrq) {
1267 for (i = 0; i < adapter->req_tx_queues; i++)
1268 if (adapter->tx_scrq[i])
1269 release_sub_crq_queue(adapter,
1270 adapter->tx_scrq[i]);
1271 adapter->tx_scrq = NULL;
1272 }
1273
1274 if (adapter->rx_scrq) {
1275 for (i = 0; i < adapter->req_rx_queues; i++)
1276 if (adapter->rx_scrq[i])
1277 release_sub_crq_queue(adapter,
1278 adapter->rx_scrq[i]);
1279 adapter->rx_scrq = NULL;
1280 }
1281
1282 adapter->requested_caps = 0;
1283 }
1284
1285 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1286 struct ibmvnic_sub_crq_queue *scrq)
1287 {
1288 struct device *dev = &adapter->vdev->dev;
1289 unsigned long rc;
1290
1291 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1292 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1293 if (rc)
1294 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1295 scrq->hw_irq, rc);
1296 return rc;
1297 }
1298
1299 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1300 struct ibmvnic_sub_crq_queue *scrq)
1301 {
1302 struct device *dev = &adapter->vdev->dev;
1303 unsigned long rc;
1304
1305 if (scrq->hw_irq > 0x100000000ULL) {
1306 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1307 return 1;
1308 }
1309
1310 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1311 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1312 if (rc)
1313 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1314 scrq->hw_irq, rc);
1315 return rc;
1316 }
1317
1318 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1319 struct ibmvnic_sub_crq_queue *scrq)
1320 {
1321 struct device *dev = &adapter->vdev->dev;
1322 struct ibmvnic_tx_buff *txbuff;
1323 union sub_crq *next;
1324 int index;
1325 int i, j;
1326 u8 first;
1327
1328 restart_loop:
1329 while (pending_scrq(adapter, scrq)) {
1330 unsigned int pool = scrq->pool_index;
1331
1332 next = ibmvnic_next_scrq(adapter, scrq);
1333 for (i = 0; i < next->tx_comp.num_comps; i++) {
1334 if (next->tx_comp.rcs[i]) {
1335 dev_err(dev, "tx error %x\n",
1336 next->tx_comp.rcs[i]);
1337 continue;
1338 }
1339 index = be32_to_cpu(next->tx_comp.correlators[i]);
1340 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1341
1342 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1343 if (!txbuff->data_dma[j])
1344 continue;
1345
1346 txbuff->data_dma[j] = 0;
1347 txbuff->used_bounce = false;
1348 }
1349 /* if sub_crq was sent indirectly */
1350 first = txbuff->indir_arr[0].generic.first;
1351 if (first == IBMVNIC_CRQ_CMD) {
1352 dma_unmap_single(dev, txbuff->indir_dma,
1353 sizeof(txbuff->indir_arr),
1354 DMA_TO_DEVICE);
1355 }
1356
1357 if (txbuff->last_frag)
1358 dev_kfree_skb_any(txbuff->skb);
1359
1360 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1361 producer_index] = index;
1362 adapter->tx_pool[pool].producer_index =
1363 (adapter->tx_pool[pool].producer_index + 1) %
1364 adapter->max_tx_entries_per_subcrq;
1365 }
1366 /* remove tx_comp scrq*/
1367 next->tx_comp.first = 0;
1368 }
1369
1370 enable_scrq_irq(adapter, scrq);
1371
1372 if (pending_scrq(adapter, scrq)) {
1373 disable_scrq_irq(adapter, scrq);
1374 goto restart_loop;
1375 }
1376
1377 return 0;
1378 }
1379
1380 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1381 {
1382 struct ibmvnic_sub_crq_queue *scrq = instance;
1383 struct ibmvnic_adapter *adapter = scrq->adapter;
1384
1385 disable_scrq_irq(adapter, scrq);
1386 ibmvnic_complete_tx(adapter, scrq);
1387
1388 return IRQ_HANDLED;
1389 }
1390
1391 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1392 {
1393 struct ibmvnic_sub_crq_queue *scrq = instance;
1394 struct ibmvnic_adapter *adapter = scrq->adapter;
1395
1396 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1397 disable_scrq_irq(adapter, scrq);
1398 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1399 }
1400
1401 return IRQ_HANDLED;
1402 }
1403
1404 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1405 {
1406 struct device *dev = &adapter->vdev->dev;
1407 struct ibmvnic_sub_crq_queue *scrq;
1408 int i = 0, j = 0;
1409 int rc = 0;
1410
1411 for (i = 0; i < adapter->req_tx_queues; i++) {
1412 scrq = adapter->tx_scrq[i];
1413 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1414
1415 if (!scrq->irq) {
1416 rc = -EINVAL;
1417 dev_err(dev, "Error mapping irq\n");
1418 goto req_tx_irq_failed;
1419 }
1420
1421 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1422 0, "ibmvnic_tx", scrq);
1423
1424 if (rc) {
1425 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1426 scrq->irq, rc);
1427 irq_dispose_mapping(scrq->irq);
1428 goto req_rx_irq_failed;
1429 }
1430 }
1431
1432 for (i = 0; i < adapter->req_rx_queues; i++) {
1433 scrq = adapter->rx_scrq[i];
1434 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1435 if (!scrq->irq) {
1436 rc = -EINVAL;
1437 dev_err(dev, "Error mapping irq\n");
1438 goto req_rx_irq_failed;
1439 }
1440 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1441 0, "ibmvnic_rx", scrq);
1442 if (rc) {
1443 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1444 scrq->irq, rc);
1445 irq_dispose_mapping(scrq->irq);
1446 goto req_rx_irq_failed;
1447 }
1448 }
1449 return rc;
1450
1451 req_rx_irq_failed:
1452 for (j = 0; j < i; j++)
1453 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1454 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1455 i = adapter->req_tx_queues;
1456 req_tx_irq_failed:
1457 for (j = 0; j < i; j++)
1458 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1459 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1460 release_sub_crqs_no_irqs(adapter);
1461 return rc;
1462 }
1463
1464 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1465 {
1466 struct device *dev = &adapter->vdev->dev;
1467 struct ibmvnic_sub_crq_queue **allqueues;
1468 int registered_queues = 0;
1469 union ibmvnic_crq crq;
1470 int total_queues;
1471 int more = 0;
1472 int i;
1473
1474 if (!retry) {
1475 /* Sub-CRQ entries are 32 byte long */
1476 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1477
1478 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1479 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1480 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1481 goto allqueues_failed;
1482 }
1483
1484 /* Get the minimum between the queried max and the entries
1485 * that fit in our PAGE_SIZE
1486 */
1487 adapter->req_tx_entries_per_subcrq =
1488 adapter->max_tx_entries_per_subcrq > entries_page ?
1489 entries_page : adapter->max_tx_entries_per_subcrq;
1490 adapter->req_rx_add_entries_per_subcrq =
1491 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1492 entries_page : adapter->max_rx_add_entries_per_subcrq;
1493
1494 /* Choosing the maximum number of queues supported by firmware*/
1495 adapter->req_tx_queues = adapter->max_tx_queues;
1496 adapter->req_rx_queues = adapter->max_rx_queues;
1497 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1498
1499 adapter->req_mtu = adapter->max_mtu;
1500 }
1501
1502 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1503
1504 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1505 if (!allqueues)
1506 goto allqueues_failed;
1507
1508 for (i = 0; i < total_queues; i++) {
1509 allqueues[i] = init_sub_crq_queue(adapter);
1510 if (!allqueues[i]) {
1511 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1512 break;
1513 }
1514 registered_queues++;
1515 }
1516
1517 /* Make sure we were able to register the minimum number of queues */
1518 if (registered_queues <
1519 adapter->min_tx_queues + adapter->min_rx_queues) {
1520 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1521 goto tx_failed;
1522 }
1523
1524 /* Distribute the failed allocated queues*/
1525 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1526 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1527 switch (i % 3) {
1528 case 0:
1529 if (adapter->req_rx_queues > adapter->min_rx_queues)
1530 adapter->req_rx_queues--;
1531 else
1532 more++;
1533 break;
1534 case 1:
1535 if (adapter->req_tx_queues > adapter->min_tx_queues)
1536 adapter->req_tx_queues--;
1537 else
1538 more++;
1539 break;
1540 }
1541 }
1542
1543 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1544 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1545 if (!adapter->tx_scrq)
1546 goto tx_failed;
1547
1548 for (i = 0; i < adapter->req_tx_queues; i++) {
1549 adapter->tx_scrq[i] = allqueues[i];
1550 adapter->tx_scrq[i]->pool_index = i;
1551 }
1552
1553 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1554 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1555 if (!adapter->rx_scrq)
1556 goto rx_failed;
1557
1558 for (i = 0; i < adapter->req_rx_queues; i++) {
1559 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1560 adapter->rx_scrq[i]->scrq_num = i;
1561 }
1562
1563 memset(&crq, 0, sizeof(crq));
1564 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1565 crq.request_capability.cmd = REQUEST_CAPABILITY;
1566
1567 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1568 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1569 ibmvnic_send_crq(adapter, &crq);
1570
1571 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1572 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1573 ibmvnic_send_crq(adapter, &crq);
1574
1575 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1576 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1577 ibmvnic_send_crq(adapter, &crq);
1578
1579 crq.request_capability.capability =
1580 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1581 crq.request_capability.number =
1582 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1583 ibmvnic_send_crq(adapter, &crq);
1584
1585 crq.request_capability.capability =
1586 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1587 crq.request_capability.number =
1588 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1589 ibmvnic_send_crq(adapter, &crq);
1590
1591 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1592 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1593 ibmvnic_send_crq(adapter, &crq);
1594
1595 if (adapter->netdev->flags & IFF_PROMISC) {
1596 if (adapter->promisc_supported) {
1597 crq.request_capability.capability =
1598 cpu_to_be16(PROMISC_REQUESTED);
1599 crq.request_capability.number = cpu_to_be64(1);
1600 ibmvnic_send_crq(adapter, &crq);
1601 }
1602 } else {
1603 crq.request_capability.capability =
1604 cpu_to_be16(PROMISC_REQUESTED);
1605 crq.request_capability.number = cpu_to_be64(0);
1606 ibmvnic_send_crq(adapter, &crq);
1607 }
1608
1609 kfree(allqueues);
1610
1611 return;
1612
1613 rx_failed:
1614 kfree(adapter->tx_scrq);
1615 adapter->tx_scrq = NULL;
1616 tx_failed:
1617 for (i = 0; i < registered_queues; i++)
1618 release_sub_crq_queue(adapter, allqueues[i]);
1619 kfree(allqueues);
1620 allqueues_failed:
1621 ibmvnic_remove(adapter->vdev);
1622 }
1623
1624 static int pending_scrq(struct ibmvnic_adapter *adapter,
1625 struct ibmvnic_sub_crq_queue *scrq)
1626 {
1627 union sub_crq *entry = &scrq->msgs[scrq->cur];
1628
1629 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1630 return 1;
1631 else
1632 return 0;
1633 }
1634
1635 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1636 struct ibmvnic_sub_crq_queue *scrq)
1637 {
1638 union sub_crq *entry;
1639 unsigned long flags;
1640
1641 spin_lock_irqsave(&scrq->lock, flags);
1642 entry = &scrq->msgs[scrq->cur];
1643 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1644 if (++scrq->cur == scrq->size)
1645 scrq->cur = 0;
1646 } else {
1647 entry = NULL;
1648 }
1649 spin_unlock_irqrestore(&scrq->lock, flags);
1650
1651 return entry;
1652 }
1653
1654 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1655 {
1656 struct ibmvnic_crq_queue *queue = &adapter->crq;
1657 union ibmvnic_crq *crq;
1658
1659 crq = &queue->msgs[queue->cur];
1660 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1661 if (++queue->cur == queue->size)
1662 queue->cur = 0;
1663 } else {
1664 crq = NULL;
1665 }
1666
1667 return crq;
1668 }
1669
1670 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1671 union sub_crq *sub_crq)
1672 {
1673 unsigned int ua = adapter->vdev->unit_address;
1674 struct device *dev = &adapter->vdev->dev;
1675 u64 *u64_crq = (u64 *)sub_crq;
1676 int rc;
1677
1678 netdev_dbg(adapter->netdev,
1679 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1680 (unsigned long int)cpu_to_be64(remote_handle),
1681 (unsigned long int)cpu_to_be64(u64_crq[0]),
1682 (unsigned long int)cpu_to_be64(u64_crq[1]),
1683 (unsigned long int)cpu_to_be64(u64_crq[2]),
1684 (unsigned long int)cpu_to_be64(u64_crq[3]));
1685
1686 /* Make sure the hypervisor sees the complete request */
1687 mb();
1688
1689 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1690 cpu_to_be64(remote_handle),
1691 cpu_to_be64(u64_crq[0]),
1692 cpu_to_be64(u64_crq[1]),
1693 cpu_to_be64(u64_crq[2]),
1694 cpu_to_be64(u64_crq[3]));
1695
1696 if (rc) {
1697 if (rc == H_CLOSED)
1698 dev_warn(dev, "CRQ Queue closed\n");
1699 dev_err(dev, "Send error (rc=%d)\n", rc);
1700 }
1701
1702 return rc;
1703 }
1704
1705 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1706 u64 remote_handle, u64 ioba, u64 num_entries)
1707 {
1708 unsigned int ua = adapter->vdev->unit_address;
1709 struct device *dev = &adapter->vdev->dev;
1710 int rc;
1711
1712 /* Make sure the hypervisor sees the complete request */
1713 mb();
1714 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1715 cpu_to_be64(remote_handle),
1716 ioba, num_entries);
1717
1718 if (rc) {
1719 if (rc == H_CLOSED)
1720 dev_warn(dev, "CRQ Queue closed\n");
1721 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1722 }
1723
1724 return rc;
1725 }
1726
1727 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1728 union ibmvnic_crq *crq)
1729 {
1730 unsigned int ua = adapter->vdev->unit_address;
1731 struct device *dev = &adapter->vdev->dev;
1732 u64 *u64_crq = (u64 *)crq;
1733 int rc;
1734
1735 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1736 (unsigned long int)cpu_to_be64(u64_crq[0]),
1737 (unsigned long int)cpu_to_be64(u64_crq[1]));
1738
1739 /* Make sure the hypervisor sees the complete request */
1740 mb();
1741
1742 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1743 cpu_to_be64(u64_crq[0]),
1744 cpu_to_be64(u64_crq[1]));
1745
1746 if (rc) {
1747 if (rc == H_CLOSED)
1748 dev_warn(dev, "CRQ Queue closed\n");
1749 dev_warn(dev, "Send error (rc=%d)\n", rc);
1750 }
1751
1752 return rc;
1753 }
1754
1755 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1756 {
1757 union ibmvnic_crq crq;
1758
1759 memset(&crq, 0, sizeof(crq));
1760 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1761 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1762 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1763
1764 return ibmvnic_send_crq(adapter, &crq);
1765 }
1766
1767 static int ibmvnic_send_crq_init_complete(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_COMPLETE;
1774 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1775
1776 return ibmvnic_send_crq(adapter, &crq);
1777 }
1778
1779 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1780 {
1781 union ibmvnic_crq crq;
1782
1783 memset(&crq, 0, sizeof(crq));
1784 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1785 crq.version_exchange.cmd = VERSION_EXCHANGE;
1786 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1787
1788 return ibmvnic_send_crq(adapter, &crq);
1789 }
1790
1791 static void send_login(struct ibmvnic_adapter *adapter)
1792 {
1793 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1794 struct ibmvnic_login_buffer *login_buffer;
1795 struct ibmvnic_inflight_cmd *inflight_cmd;
1796 struct device *dev = &adapter->vdev->dev;
1797 dma_addr_t rsp_buffer_token;
1798 dma_addr_t buffer_token;
1799 size_t rsp_buffer_size;
1800 union ibmvnic_crq crq;
1801 unsigned long flags;
1802 size_t buffer_size;
1803 __be64 *tx_list_p;
1804 __be64 *rx_list_p;
1805 int i;
1806
1807 buffer_size =
1808 sizeof(struct ibmvnic_login_buffer) +
1809 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1810
1811 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1812 if (!login_buffer)
1813 goto buf_alloc_failed;
1814
1815 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1816 DMA_TO_DEVICE);
1817 if (dma_mapping_error(dev, buffer_token)) {
1818 dev_err(dev, "Couldn't map login buffer\n");
1819 goto buf_map_failed;
1820 }
1821
1822 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1823 sizeof(u64) * adapter->req_tx_queues +
1824 sizeof(u64) * adapter->req_rx_queues +
1825 sizeof(u64) * adapter->req_rx_queues +
1826 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1827
1828 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1829 if (!login_rsp_buffer)
1830 goto buf_rsp_alloc_failed;
1831
1832 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1833 rsp_buffer_size, DMA_FROM_DEVICE);
1834 if (dma_mapping_error(dev, rsp_buffer_token)) {
1835 dev_err(dev, "Couldn't map login rsp buffer\n");
1836 goto buf_rsp_map_failed;
1837 }
1838 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1839 if (!inflight_cmd) {
1840 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1841 goto inflight_alloc_failed;
1842 }
1843 adapter->login_buf = login_buffer;
1844 adapter->login_buf_token = buffer_token;
1845 adapter->login_buf_sz = buffer_size;
1846 adapter->login_rsp_buf = login_rsp_buffer;
1847 adapter->login_rsp_buf_token = rsp_buffer_token;
1848 adapter->login_rsp_buf_sz = rsp_buffer_size;
1849
1850 login_buffer->len = cpu_to_be32(buffer_size);
1851 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1852 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1853 login_buffer->off_txcomp_subcrqs =
1854 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1855 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1856 login_buffer->off_rxcomp_subcrqs =
1857 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1858 sizeof(u64) * adapter->req_tx_queues);
1859 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1860 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1861
1862 tx_list_p = (__be64 *)((char *)login_buffer +
1863 sizeof(struct ibmvnic_login_buffer));
1864 rx_list_p = (__be64 *)((char *)login_buffer +
1865 sizeof(struct ibmvnic_login_buffer) +
1866 sizeof(u64) * adapter->req_tx_queues);
1867
1868 for (i = 0; i < adapter->req_tx_queues; i++) {
1869 if (adapter->tx_scrq[i]) {
1870 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1871 crq_num);
1872 }
1873 }
1874
1875 for (i = 0; i < adapter->req_rx_queues; i++) {
1876 if (adapter->rx_scrq[i]) {
1877 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1878 crq_num);
1879 }
1880 }
1881
1882 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1883 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1884 netdev_dbg(adapter->netdev, "%016lx\n",
1885 ((unsigned long int *)(adapter->login_buf))[i]);
1886 }
1887
1888 memset(&crq, 0, sizeof(crq));
1889 crq.login.first = IBMVNIC_CRQ_CMD;
1890 crq.login.cmd = LOGIN;
1891 crq.login.ioba = cpu_to_be32(buffer_token);
1892 crq.login.len = cpu_to_be32(buffer_size);
1893
1894 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1895
1896 spin_lock_irqsave(&adapter->inflight_lock, flags);
1897 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1898 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1899
1900 ibmvnic_send_crq(adapter, &crq);
1901
1902 return;
1903
1904 inflight_alloc_failed:
1905 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1906 DMA_FROM_DEVICE);
1907 buf_rsp_map_failed:
1908 kfree(login_rsp_buffer);
1909 buf_rsp_alloc_failed:
1910 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1911 buf_map_failed:
1912 kfree(login_buffer);
1913 buf_alloc_failed:
1914 return;
1915 }
1916
1917 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1918 u32 len, u8 map_id)
1919 {
1920 union ibmvnic_crq crq;
1921
1922 memset(&crq, 0, sizeof(crq));
1923 crq.request_map.first = IBMVNIC_CRQ_CMD;
1924 crq.request_map.cmd = REQUEST_MAP;
1925 crq.request_map.map_id = map_id;
1926 crq.request_map.ioba = cpu_to_be32(addr);
1927 crq.request_map.len = cpu_to_be32(len);
1928 ibmvnic_send_crq(adapter, &crq);
1929 }
1930
1931 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1932 {
1933 union ibmvnic_crq crq;
1934
1935 memset(&crq, 0, sizeof(crq));
1936 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1937 crq.request_unmap.cmd = REQUEST_UNMAP;
1938 crq.request_unmap.map_id = map_id;
1939 ibmvnic_send_crq(adapter, &crq);
1940 }
1941
1942 static void send_map_query(struct ibmvnic_adapter *adapter)
1943 {
1944 union ibmvnic_crq crq;
1945
1946 memset(&crq, 0, sizeof(crq));
1947 crq.query_map.first = IBMVNIC_CRQ_CMD;
1948 crq.query_map.cmd = QUERY_MAP;
1949 ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1953 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1954 {
1955 union ibmvnic_crq crq;
1956
1957 atomic_set(&adapter->running_cap_queries, 0);
1958 memset(&crq, 0, sizeof(crq));
1959 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1960 crq.query_capability.cmd = QUERY_CAPABILITY;
1961
1962 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1963 atomic_inc(&adapter->running_cap_queries);
1964 ibmvnic_send_crq(adapter, &crq);
1965
1966 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1967 atomic_inc(&adapter->running_cap_queries);
1968 ibmvnic_send_crq(adapter, &crq);
1969
1970 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1971 atomic_inc(&adapter->running_cap_queries);
1972 ibmvnic_send_crq(adapter, &crq);
1973
1974 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1975 atomic_inc(&adapter->running_cap_queries);
1976 ibmvnic_send_crq(adapter, &crq);
1977
1978 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1979 atomic_inc(&adapter->running_cap_queries);
1980 ibmvnic_send_crq(adapter, &crq);
1981
1982 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1983 atomic_inc(&adapter->running_cap_queries);
1984 ibmvnic_send_crq(adapter, &crq);
1985
1986 crq.query_capability.capability =
1987 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1988 atomic_inc(&adapter->running_cap_queries);
1989 ibmvnic_send_crq(adapter, &crq);
1990
1991 crq.query_capability.capability =
1992 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1993 atomic_inc(&adapter->running_cap_queries);
1994 ibmvnic_send_crq(adapter, &crq);
1995
1996 crq.query_capability.capability =
1997 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1998 atomic_inc(&adapter->running_cap_queries);
1999 ibmvnic_send_crq(adapter, &crq);
2000
2001 crq.query_capability.capability =
2002 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2003 atomic_inc(&adapter->running_cap_queries);
2004 ibmvnic_send_crq(adapter, &crq);
2005
2006 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2007 atomic_inc(&adapter->running_cap_queries);
2008 ibmvnic_send_crq(adapter, &crq);
2009
2010 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2011 atomic_inc(&adapter->running_cap_queries);
2012 ibmvnic_send_crq(adapter, &crq);
2013
2014 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2015 atomic_inc(&adapter->running_cap_queries);
2016 ibmvnic_send_crq(adapter, &crq);
2017
2018 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2019 atomic_inc(&adapter->running_cap_queries);
2020 ibmvnic_send_crq(adapter, &crq);
2021
2022 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2023 atomic_inc(&adapter->running_cap_queries);
2024 ibmvnic_send_crq(adapter, &crq);
2025
2026 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2027 atomic_inc(&adapter->running_cap_queries);
2028 ibmvnic_send_crq(adapter, &crq);
2029
2030 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2031 atomic_inc(&adapter->running_cap_queries);
2032 ibmvnic_send_crq(adapter, &crq);
2033
2034 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2035 atomic_inc(&adapter->running_cap_queries);
2036 ibmvnic_send_crq(adapter, &crq);
2037
2038 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2039 atomic_inc(&adapter->running_cap_queries);
2040 ibmvnic_send_crq(adapter, &crq);
2041
2042 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2043 atomic_inc(&adapter->running_cap_queries);
2044 ibmvnic_send_crq(adapter, &crq);
2045
2046 crq.query_capability.capability =
2047 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2048 atomic_inc(&adapter->running_cap_queries);
2049 ibmvnic_send_crq(adapter, &crq);
2050
2051 crq.query_capability.capability =
2052 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2053 atomic_inc(&adapter->running_cap_queries);
2054 ibmvnic_send_crq(adapter, &crq);
2055
2056 crq.query_capability.capability =
2057 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2058 atomic_inc(&adapter->running_cap_queries);
2059 ibmvnic_send_crq(adapter, &crq);
2060
2061 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2062 atomic_inc(&adapter->running_cap_queries);
2063 ibmvnic_send_crq(adapter, &crq);
2064 }
2065
2066 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2067 {
2068 struct device *dev = &adapter->vdev->dev;
2069 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2070 union ibmvnic_crq crq;
2071 int i;
2072
2073 dma_unmap_single(dev, adapter->ip_offload_tok,
2074 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2075
2076 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2077 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2078 netdev_dbg(adapter->netdev, "%016lx\n",
2079 ((unsigned long int *)(buf))[i]);
2080
2081 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2082 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2083 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2084 buf->tcp_ipv4_chksum);
2085 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2086 buf->tcp_ipv6_chksum);
2087 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2088 buf->udp_ipv4_chksum);
2089 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2090 buf->udp_ipv6_chksum);
2091 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2092 buf->large_tx_ipv4);
2093 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2094 buf->large_tx_ipv6);
2095 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2096 buf->large_rx_ipv4);
2097 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2098 buf->large_rx_ipv6);
2099 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2100 buf->max_ipv4_header_size);
2101 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2102 buf->max_ipv6_header_size);
2103 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2104 buf->max_tcp_header_size);
2105 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2106 buf->max_udp_header_size);
2107 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2108 buf->max_large_tx_size);
2109 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2110 buf->max_large_rx_size);
2111 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2112 buf->ipv6_extension_header);
2113 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2114 buf->tcp_pseudosum_req);
2115 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2116 buf->num_ipv6_ext_headers);
2117 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2118 buf->off_ipv6_ext_headers);
2119
2120 adapter->ip_offload_ctrl_tok =
2121 dma_map_single(dev, &adapter->ip_offload_ctrl,
2122 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2123
2124 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2125 dev_err(dev, "Couldn't map ip offload control buffer\n");
2126 return;
2127 }
2128
2129 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2130 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2131 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2132 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2133 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2134
2135 /* large_tx/rx disabled for now, additional features needed */
2136 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2137 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2138 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2139 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2140
2141 adapter->netdev->features = NETIF_F_GSO;
2142
2143 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2144 adapter->netdev->features |= NETIF_F_IP_CSUM;
2145
2146 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2147 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2148
2149 if ((adapter->netdev->features &
2150 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2151 adapter->netdev->features |= NETIF_F_RXCSUM;
2152
2153 memset(&crq, 0, sizeof(crq));
2154 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2155 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2156 crq.control_ip_offload.len =
2157 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2158 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2159 ibmvnic_send_crq(adapter, &crq);
2160 }
2161
2162 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2163 struct ibmvnic_adapter *adapter)
2164 {
2165 struct device *dev = &adapter->vdev->dev;
2166 struct ibmvnic_error_buff *error_buff, *tmp;
2167 unsigned long flags;
2168 bool found = false;
2169 int i;
2170
2171 if (!crq->request_error_rsp.rc.code) {
2172 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2173 crq->request_error_rsp.rc.code);
2174 return;
2175 }
2176
2177 spin_lock_irqsave(&adapter->error_list_lock, flags);
2178 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2179 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2180 found = true;
2181 list_del(&error_buff->list);
2182 break;
2183 }
2184 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2185
2186 if (!found) {
2187 dev_err(dev, "Couldn't find error id %x\n",
2188 crq->request_error_rsp.error_id);
2189 return;
2190 }
2191
2192 dev_err(dev, "Detailed info for error id %x:",
2193 crq->request_error_rsp.error_id);
2194
2195 for (i = 0; i < error_buff->len; i++) {
2196 pr_cont("%02x", (int)error_buff->buff[i]);
2197 if (i % 8 == 7)
2198 pr_cont(" ");
2199 }
2200 pr_cont("\n");
2201
2202 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2203 DMA_FROM_DEVICE);
2204 kfree(error_buff->buff);
2205 kfree(error_buff);
2206 }
2207
2208 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2209 struct ibmvnic_adapter *adapter)
2210 {
2211 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2212 struct ibmvnic_inflight_cmd *inflight_cmd;
2213 struct device *dev = &adapter->vdev->dev;
2214 union ibmvnic_crq newcrq;
2215 unsigned long flags;
2216
2217 /* allocate and map buffer */
2218 adapter->dump_data = kmalloc(len, GFP_KERNEL);
2219 if (!adapter->dump_data) {
2220 complete(&adapter->fw_done);
2221 return;
2222 }
2223
2224 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2225 DMA_FROM_DEVICE);
2226
2227 if (dma_mapping_error(dev, adapter->dump_data_token)) {
2228 if (!firmware_has_feature(FW_FEATURE_CMO))
2229 dev_err(dev, "Couldn't map dump data\n");
2230 kfree(adapter->dump_data);
2231 complete(&adapter->fw_done);
2232 return;
2233 }
2234
2235 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2236 if (!inflight_cmd) {
2237 dma_unmap_single(dev, adapter->dump_data_token, len,
2238 DMA_FROM_DEVICE);
2239 kfree(adapter->dump_data);
2240 complete(&adapter->fw_done);
2241 return;
2242 }
2243
2244 memset(&newcrq, 0, sizeof(newcrq));
2245 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2246 newcrq.request_dump.cmd = REQUEST_DUMP;
2247 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2248 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2249
2250 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2251
2252 spin_lock_irqsave(&adapter->inflight_lock, flags);
2253 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2254 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2255
2256 ibmvnic_send_crq(adapter, &newcrq);
2257 }
2258
2259 static void handle_error_indication(union ibmvnic_crq *crq,
2260 struct ibmvnic_adapter *adapter)
2261 {
2262 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2263 struct ibmvnic_inflight_cmd *inflight_cmd;
2264 struct device *dev = &adapter->vdev->dev;
2265 struct ibmvnic_error_buff *error_buff;
2266 union ibmvnic_crq new_crq;
2267 unsigned long flags;
2268
2269 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2270 crq->error_indication.
2271 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2272 crq->error_indication.error_id,
2273 crq->error_indication.error_cause);
2274
2275 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2276 if (!error_buff)
2277 return;
2278
2279 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2280 if (!error_buff->buff) {
2281 kfree(error_buff);
2282 return;
2283 }
2284
2285 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2286 DMA_FROM_DEVICE);
2287 if (dma_mapping_error(dev, error_buff->dma)) {
2288 if (!firmware_has_feature(FW_FEATURE_CMO))
2289 dev_err(dev, "Couldn't map error buffer\n");
2290 kfree(error_buff->buff);
2291 kfree(error_buff);
2292 return;
2293 }
2294
2295 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2296 if (!inflight_cmd) {
2297 dma_unmap_single(dev, error_buff->dma, detail_len,
2298 DMA_FROM_DEVICE);
2299 kfree(error_buff->buff);
2300 kfree(error_buff);
2301 return;
2302 }
2303
2304 error_buff->len = detail_len;
2305 error_buff->error_id = crq->error_indication.error_id;
2306
2307 spin_lock_irqsave(&adapter->error_list_lock, flags);
2308 list_add_tail(&error_buff->list, &adapter->errors);
2309 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2310
2311 memset(&new_crq, 0, sizeof(new_crq));
2312 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2313 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2314 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2315 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2316 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2317
2318 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2319
2320 spin_lock_irqsave(&adapter->inflight_lock, flags);
2321 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2322 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2323
2324 ibmvnic_send_crq(adapter, &new_crq);
2325 }
2326
2327 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2328 struct ibmvnic_adapter *adapter)
2329 {
2330 struct net_device *netdev = adapter->netdev;
2331 struct device *dev = &adapter->vdev->dev;
2332 long rc;
2333
2334 rc = crq->change_mac_addr_rsp.rc.code;
2335 if (rc) {
2336 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2337 return;
2338 }
2339 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2340 ETH_ALEN);
2341 }
2342
2343 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2344 struct ibmvnic_adapter *adapter)
2345 {
2346 struct device *dev = &adapter->vdev->dev;
2347 u64 *req_value;
2348 char *name;
2349
2350 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2351 case REQ_TX_QUEUES:
2352 req_value = &adapter->req_tx_queues;
2353 name = "tx";
2354 break;
2355 case REQ_RX_QUEUES:
2356 req_value = &adapter->req_rx_queues;
2357 name = "rx";
2358 break;
2359 case REQ_RX_ADD_QUEUES:
2360 req_value = &adapter->req_rx_add_queues;
2361 name = "rx_add";
2362 break;
2363 case REQ_TX_ENTRIES_PER_SUBCRQ:
2364 req_value = &adapter->req_tx_entries_per_subcrq;
2365 name = "tx_entries_per_subcrq";
2366 break;
2367 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2368 req_value = &adapter->req_rx_add_entries_per_subcrq;
2369 name = "rx_add_entries_per_subcrq";
2370 break;
2371 case REQ_MTU:
2372 req_value = &adapter->req_mtu;
2373 name = "mtu";
2374 break;
2375 case PROMISC_REQUESTED:
2376 req_value = &adapter->promisc;
2377 name = "promisc";
2378 break;
2379 default:
2380 dev_err(dev, "Got invalid cap request rsp %d\n",
2381 crq->request_capability.capability);
2382 return;
2383 }
2384
2385 switch (crq->request_capability_rsp.rc.code) {
2386 case SUCCESS:
2387 break;
2388 case PARTIALSUCCESS:
2389 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2390 *req_value,
2391 (long int)be32_to_cpu(crq->request_capability_rsp.
2392 number), name);
2393 release_sub_crqs_no_irqs(adapter);
2394 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2395 init_sub_crqs(adapter, 1);
2396 return;
2397 default:
2398 dev_err(dev, "Error %d in request cap rsp\n",
2399 crq->request_capability_rsp.rc.code);
2400 return;
2401 }
2402
2403 /* Done receiving requested capabilities, query IP offload support */
2404 if (++adapter->requested_caps == 7) {
2405 union ibmvnic_crq newcrq;
2406 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2407 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2408 &adapter->ip_offload_buf;
2409
2410 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2411 buf_sz,
2412 DMA_FROM_DEVICE);
2413
2414 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2415 if (!firmware_has_feature(FW_FEATURE_CMO))
2416 dev_err(dev, "Couldn't map offload buffer\n");
2417 return;
2418 }
2419
2420 memset(&newcrq, 0, sizeof(newcrq));
2421 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2422 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2423 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2424 newcrq.query_ip_offload.ioba =
2425 cpu_to_be32(adapter->ip_offload_tok);
2426
2427 ibmvnic_send_crq(adapter, &newcrq);
2428 }
2429 }
2430
2431 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2432 struct ibmvnic_adapter *adapter)
2433 {
2434 struct device *dev = &adapter->vdev->dev;
2435 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2436 struct ibmvnic_login_buffer *login = adapter->login_buf;
2437 union ibmvnic_crq crq;
2438 int i;
2439
2440 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2441 DMA_BIDIRECTIONAL);
2442 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2443 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2444
2445 /* If the number of queues requested can't be allocated by the
2446 * server, the login response will return with code 1. We will need
2447 * to resend the login buffer with fewer queues requested.
2448 */
2449 if (login_rsp_crq->generic.rc.code) {
2450 adapter->renegotiate = true;
2451 complete(&adapter->init_done);
2452 return 0;
2453 }
2454
2455 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2456 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2457 netdev_dbg(adapter->netdev, "%016lx\n",
2458 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2459 }
2460
2461 /* Sanity checks */
2462 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2463 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2464 adapter->req_rx_add_queues !=
2465 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2466 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2467 ibmvnic_remove(adapter->vdev);
2468 return -EIO;
2469 }
2470 complete(&adapter->init_done);
2471
2472 memset(&crq, 0, sizeof(crq));
2473 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2474 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2475 ibmvnic_send_crq(adapter, &crq);
2476
2477 return 0;
2478 }
2479
2480 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2481 struct ibmvnic_adapter *adapter)
2482 {
2483 struct device *dev = &adapter->vdev->dev;
2484 u8 map_id = crq->request_map_rsp.map_id;
2485 int tx_subcrqs;
2486 int rx_subcrqs;
2487 long rc;
2488 int i;
2489
2490 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2491 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2492
2493 rc = crq->request_map_rsp.rc.code;
2494 if (rc) {
2495 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2496 adapter->map_id--;
2497 /* need to find and zero tx/rx_pool map_id */
2498 for (i = 0; i < tx_subcrqs; i++) {
2499 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2500 adapter->tx_pool[i].long_term_buff.map_id = 0;
2501 }
2502 for (i = 0; i < rx_subcrqs; i++) {
2503 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2504 adapter->rx_pool[i].long_term_buff.map_id = 0;
2505 }
2506 }
2507 complete(&adapter->fw_done);
2508 }
2509
2510 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2511 struct ibmvnic_adapter *adapter)
2512 {
2513 struct device *dev = &adapter->vdev->dev;
2514 long rc;
2515
2516 rc = crq->request_unmap_rsp.rc.code;
2517 if (rc)
2518 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2519 }
2520
2521 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2522 struct ibmvnic_adapter *adapter)
2523 {
2524 struct net_device *netdev = adapter->netdev;
2525 struct device *dev = &adapter->vdev->dev;
2526 long rc;
2527
2528 rc = crq->query_map_rsp.rc.code;
2529 if (rc) {
2530 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2531 return;
2532 }
2533 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2534 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2535 crq->query_map_rsp.free_pages);
2536 }
2537
2538 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2539 struct ibmvnic_adapter *adapter)
2540 {
2541 struct net_device *netdev = adapter->netdev;
2542 struct device *dev = &adapter->vdev->dev;
2543 long rc;
2544
2545 atomic_dec(&adapter->running_cap_queries);
2546 netdev_dbg(netdev, "Outstanding queries: %d\n",
2547 atomic_read(&adapter->running_cap_queries));
2548 rc = crq->query_capability.rc.code;
2549 if (rc) {
2550 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2551 goto out;
2552 }
2553
2554 switch (be16_to_cpu(crq->query_capability.capability)) {
2555 case MIN_TX_QUEUES:
2556 adapter->min_tx_queues =
2557 be64_to_cpu(crq->query_capability.number);
2558 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2559 adapter->min_tx_queues);
2560 break;
2561 case MIN_RX_QUEUES:
2562 adapter->min_rx_queues =
2563 be64_to_cpu(crq->query_capability.number);
2564 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2565 adapter->min_rx_queues);
2566 break;
2567 case MIN_RX_ADD_QUEUES:
2568 adapter->min_rx_add_queues =
2569 be64_to_cpu(crq->query_capability.number);
2570 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2571 adapter->min_rx_add_queues);
2572 break;
2573 case MAX_TX_QUEUES:
2574 adapter->max_tx_queues =
2575 be64_to_cpu(crq->query_capability.number);
2576 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2577 adapter->max_tx_queues);
2578 break;
2579 case MAX_RX_QUEUES:
2580 adapter->max_rx_queues =
2581 be64_to_cpu(crq->query_capability.number);
2582 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2583 adapter->max_rx_queues);
2584 break;
2585 case MAX_RX_ADD_QUEUES:
2586 adapter->max_rx_add_queues =
2587 be64_to_cpu(crq->query_capability.number);
2588 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2589 adapter->max_rx_add_queues);
2590 break;
2591 case MIN_TX_ENTRIES_PER_SUBCRQ:
2592 adapter->min_tx_entries_per_subcrq =
2593 be64_to_cpu(crq->query_capability.number);
2594 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2595 adapter->min_tx_entries_per_subcrq);
2596 break;
2597 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2598 adapter->min_rx_add_entries_per_subcrq =
2599 be64_to_cpu(crq->query_capability.number);
2600 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2601 adapter->min_rx_add_entries_per_subcrq);
2602 break;
2603 case MAX_TX_ENTRIES_PER_SUBCRQ:
2604 adapter->max_tx_entries_per_subcrq =
2605 be64_to_cpu(crq->query_capability.number);
2606 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2607 adapter->max_tx_entries_per_subcrq);
2608 break;
2609 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2610 adapter->max_rx_add_entries_per_subcrq =
2611 be64_to_cpu(crq->query_capability.number);
2612 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2613 adapter->max_rx_add_entries_per_subcrq);
2614 break;
2615 case TCP_IP_OFFLOAD:
2616 adapter->tcp_ip_offload =
2617 be64_to_cpu(crq->query_capability.number);
2618 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2619 adapter->tcp_ip_offload);
2620 break;
2621 case PROMISC_SUPPORTED:
2622 adapter->promisc_supported =
2623 be64_to_cpu(crq->query_capability.number);
2624 netdev_dbg(netdev, "promisc_supported = %lld\n",
2625 adapter->promisc_supported);
2626 break;
2627 case MIN_MTU:
2628 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2629 netdev->min_mtu = adapter->min_mtu;
2630 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2631 break;
2632 case MAX_MTU:
2633 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2634 netdev->max_mtu = adapter->max_mtu;
2635 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2636 break;
2637 case MAX_MULTICAST_FILTERS:
2638 adapter->max_multicast_filters =
2639 be64_to_cpu(crq->query_capability.number);
2640 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2641 adapter->max_multicast_filters);
2642 break;
2643 case VLAN_HEADER_INSERTION:
2644 adapter->vlan_header_insertion =
2645 be64_to_cpu(crq->query_capability.number);
2646 if (adapter->vlan_header_insertion)
2647 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2648 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2649 adapter->vlan_header_insertion);
2650 break;
2651 case MAX_TX_SG_ENTRIES:
2652 adapter->max_tx_sg_entries =
2653 be64_to_cpu(crq->query_capability.number);
2654 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2655 adapter->max_tx_sg_entries);
2656 break;
2657 case RX_SG_SUPPORTED:
2658 adapter->rx_sg_supported =
2659 be64_to_cpu(crq->query_capability.number);
2660 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2661 adapter->rx_sg_supported);
2662 break;
2663 case OPT_TX_COMP_SUB_QUEUES:
2664 adapter->opt_tx_comp_sub_queues =
2665 be64_to_cpu(crq->query_capability.number);
2666 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2667 adapter->opt_tx_comp_sub_queues);
2668 break;
2669 case OPT_RX_COMP_QUEUES:
2670 adapter->opt_rx_comp_queues =
2671 be64_to_cpu(crq->query_capability.number);
2672 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2673 adapter->opt_rx_comp_queues);
2674 break;
2675 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2676 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2677 be64_to_cpu(crq->query_capability.number);
2678 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2679 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2680 break;
2681 case OPT_TX_ENTRIES_PER_SUBCRQ:
2682 adapter->opt_tx_entries_per_subcrq =
2683 be64_to_cpu(crq->query_capability.number);
2684 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2685 adapter->opt_tx_entries_per_subcrq);
2686 break;
2687 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2688 adapter->opt_rxba_entries_per_subcrq =
2689 be64_to_cpu(crq->query_capability.number);
2690 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2691 adapter->opt_rxba_entries_per_subcrq);
2692 break;
2693 case TX_RX_DESC_REQ:
2694 adapter->tx_rx_desc_req = crq->query_capability.number;
2695 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2696 adapter->tx_rx_desc_req);
2697 break;
2698
2699 default:
2700 netdev_err(netdev, "Got invalid cap rsp %d\n",
2701 crq->query_capability.capability);
2702 }
2703
2704 out:
2705 if (atomic_read(&adapter->running_cap_queries) == 0)
2706 init_sub_crqs(adapter, 0);
2707 /* We're done querying the capabilities, initialize sub-crqs */
2708 }
2709
2710 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2711 struct ibmvnic_adapter *adapter)
2712 {
2713 u8 correlator = crq->control_ras_rsp.correlator;
2714 struct device *dev = &adapter->vdev->dev;
2715 bool found = false;
2716 int i;
2717
2718 if (crq->control_ras_rsp.rc.code) {
2719 dev_warn(dev, "Control ras failed rc=%d\n",
2720 crq->control_ras_rsp.rc.code);
2721 return;
2722 }
2723
2724 for (i = 0; i < adapter->ras_comp_num; i++) {
2725 if (adapter->ras_comps[i].correlator == correlator) {
2726 found = true;
2727 break;
2728 }
2729 }
2730
2731 if (!found) {
2732 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2733 return;
2734 }
2735
2736 switch (crq->control_ras_rsp.op) {
2737 case IBMVNIC_TRACE_LEVEL:
2738 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2739 break;
2740 case IBMVNIC_ERROR_LEVEL:
2741 adapter->ras_comps[i].error_check_level =
2742 crq->control_ras.level;
2743 break;
2744 case IBMVNIC_TRACE_PAUSE:
2745 adapter->ras_comp_int[i].paused = 1;
2746 break;
2747 case IBMVNIC_TRACE_RESUME:
2748 adapter->ras_comp_int[i].paused = 0;
2749 break;
2750 case IBMVNIC_TRACE_ON:
2751 adapter->ras_comps[i].trace_on = 1;
2752 break;
2753 case IBMVNIC_TRACE_OFF:
2754 adapter->ras_comps[i].trace_on = 0;
2755 break;
2756 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2757 /* trace_buff_sz is 3 bytes, stuff it into an int */
2758 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2759 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2760 crq->control_ras_rsp.trace_buff_sz[0];
2761 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2762 crq->control_ras_rsp.trace_buff_sz[1];
2763 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2764 crq->control_ras_rsp.trace_buff_sz[2];
2765 break;
2766 default:
2767 dev_err(dev, "invalid op %d on control_ras_rsp",
2768 crq->control_ras_rsp.op);
2769 }
2770 }
2771
2772 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2773 loff_t *ppos)
2774 {
2775 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2776 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2777 struct device *dev = &adapter->vdev->dev;
2778 struct ibmvnic_fw_trace_entry *trace;
2779 int num = ras_comp_int->num;
2780 union ibmvnic_crq crq;
2781 dma_addr_t trace_tok;
2782
2783 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2784 return 0;
2785
2786 trace =
2787 dma_alloc_coherent(dev,
2788 be32_to_cpu(adapter->ras_comps[num].
2789 trace_buff_size), &trace_tok,
2790 GFP_KERNEL);
2791 if (!trace) {
2792 dev_err(dev, "Couldn't alloc trace buffer\n");
2793 return 0;
2794 }
2795
2796 memset(&crq, 0, sizeof(crq));
2797 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2798 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2799 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2800 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2801 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2802 ibmvnic_send_crq(adapter, &crq);
2803
2804 init_completion(&adapter->fw_done);
2805 wait_for_completion(&adapter->fw_done);
2806
2807 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2808 len =
2809 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2810 *ppos;
2811
2812 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2813
2814 dma_free_coherent(dev,
2815 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2816 trace, trace_tok);
2817 *ppos += len;
2818 return len;
2819 }
2820
2821 static const struct file_operations trace_ops = {
2822 .owner = THIS_MODULE,
2823 .open = simple_open,
2824 .read = trace_read,
2825 };
2826
2827 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2828 loff_t *ppos)
2829 {
2830 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2831 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2832 int num = ras_comp_int->num;
2833 char buff[5]; /* 1 or 0 plus \n and \0 */
2834 int size;
2835
2836 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2837
2838 if (*ppos >= size)
2839 return 0;
2840
2841 copy_to_user(user_buf, buff, size);
2842 *ppos += size;
2843 return size;
2844 }
2845
2846 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2847 size_t len, loff_t *ppos)
2848 {
2849 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2850 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2851 int num = ras_comp_int->num;
2852 union ibmvnic_crq crq;
2853 unsigned long val;
2854 char buff[9]; /* decimal max int plus \n and \0 */
2855
2856 copy_from_user(buff, user_buf, sizeof(buff));
2857 val = kstrtoul(buff, 10, NULL);
2858
2859 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2860
2861 memset(&crq, 0, sizeof(crq));
2862 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2863 crq.control_ras.cmd = CONTROL_RAS;
2864 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2865 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2866 ibmvnic_send_crq(adapter, &crq);
2867
2868 return len;
2869 }
2870
2871 static const struct file_operations paused_ops = {
2872 .owner = THIS_MODULE,
2873 .open = simple_open,
2874 .read = paused_read,
2875 .write = paused_write,
2876 };
2877
2878 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2879 size_t len, loff_t *ppos)
2880 {
2881 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2882 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2883 int num = ras_comp_int->num;
2884 char buff[5]; /* 1 or 0 plus \n and \0 */
2885 int size;
2886
2887 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2888
2889 if (*ppos >= size)
2890 return 0;
2891
2892 copy_to_user(user_buf, buff, size);
2893 *ppos += size;
2894 return size;
2895 }
2896
2897 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2898 size_t len, loff_t *ppos)
2899 {
2900 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2901 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2902 int num = ras_comp_int->num;
2903 union ibmvnic_crq crq;
2904 unsigned long val;
2905 char buff[9]; /* decimal max int plus \n and \0 */
2906
2907 copy_from_user(buff, user_buf, sizeof(buff));
2908 val = kstrtoul(buff, 10, NULL);
2909
2910 memset(&crq, 0, sizeof(crq));
2911 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2912 crq.control_ras.cmd = CONTROL_RAS;
2913 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2914 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2915
2916 return len;
2917 }
2918
2919 static const struct file_operations tracing_ops = {
2920 .owner = THIS_MODULE,
2921 .open = simple_open,
2922 .read = tracing_read,
2923 .write = tracing_write,
2924 };
2925
2926 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2927 size_t len, loff_t *ppos)
2928 {
2929 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2930 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2931 int num = ras_comp_int->num;
2932 char buff[5]; /* decimal max char plus \n and \0 */
2933 int size;
2934
2935 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2936
2937 if (*ppos >= size)
2938 return 0;
2939
2940 copy_to_user(user_buf, buff, size);
2941 *ppos += size;
2942 return size;
2943 }
2944
2945 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2946 size_t len, loff_t *ppos)
2947 {
2948 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2949 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2950 int num = ras_comp_int->num;
2951 union ibmvnic_crq crq;
2952 unsigned long val;
2953 char buff[9]; /* decimal max int plus \n and \0 */
2954
2955 copy_from_user(buff, user_buf, sizeof(buff));
2956 val = kstrtoul(buff, 10, NULL);
2957
2958 if (val > 9)
2959 val = 9;
2960
2961 memset(&crq, 0, sizeof(crq));
2962 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2963 crq.control_ras.cmd = CONTROL_RAS;
2964 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2965 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2966 crq.control_ras.level = val;
2967 ibmvnic_send_crq(adapter, &crq);
2968
2969 return len;
2970 }
2971
2972 static const struct file_operations error_level_ops = {
2973 .owner = THIS_MODULE,
2974 .open = simple_open,
2975 .read = error_level_read,
2976 .write = error_level_write,
2977 };
2978
2979 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2980 size_t len, loff_t *ppos)
2981 {
2982 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2983 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2984 int num = ras_comp_int->num;
2985 char buff[5]; /* decimal max char plus \n and \0 */
2986 int size;
2987
2988 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2989 if (*ppos >= size)
2990 return 0;
2991
2992 copy_to_user(user_buf, buff, size);
2993 *ppos += size;
2994 return size;
2995 }
2996
2997 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2998 size_t len, loff_t *ppos)
2999 {
3000 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3001 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3002 union ibmvnic_crq crq;
3003 unsigned long val;
3004 char buff[9]; /* decimal max int plus \n and \0 */
3005
3006 copy_from_user(buff, user_buf, sizeof(buff));
3007 val = kstrtoul(buff, 10, NULL);
3008 if (val > 9)
3009 val = 9;
3010
3011 memset(&crq, 0, sizeof(crq));
3012 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3013 crq.control_ras.cmd = CONTROL_RAS;
3014 crq.control_ras.correlator =
3015 adapter->ras_comps[ras_comp_int->num].correlator;
3016 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3017 crq.control_ras.level = val;
3018 ibmvnic_send_crq(adapter, &crq);
3019
3020 return len;
3021 }
3022
3023 static const struct file_operations trace_level_ops = {
3024 .owner = THIS_MODULE,
3025 .open = simple_open,
3026 .read = trace_level_read,
3027 .write = trace_level_write,
3028 };
3029
3030 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3031 size_t len, loff_t *ppos)
3032 {
3033 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3034 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3035 int num = ras_comp_int->num;
3036 char buff[9]; /* decimal max int plus \n and \0 */
3037 int size;
3038
3039 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3040 if (*ppos >= size)
3041 return 0;
3042
3043 copy_to_user(user_buf, buff, size);
3044 *ppos += size;
3045 return size;
3046 }
3047
3048 static ssize_t trace_buff_size_write(struct file *file,
3049 const char __user *user_buf, size_t len,
3050 loff_t *ppos)
3051 {
3052 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3053 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3054 union ibmvnic_crq crq;
3055 unsigned long val;
3056 char buff[9]; /* decimal max int plus \n and \0 */
3057
3058 copy_from_user(buff, user_buf, sizeof(buff));
3059 val = kstrtoul(buff, 10, NULL);
3060
3061 memset(&crq, 0, sizeof(crq));
3062 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3063 crq.control_ras.cmd = CONTROL_RAS;
3064 crq.control_ras.correlator =
3065 adapter->ras_comps[ras_comp_int->num].correlator;
3066 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3067 /* trace_buff_sz is 3 bytes, stuff an int into it */
3068 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3069 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3070 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3071 ibmvnic_send_crq(adapter, &crq);
3072
3073 return len;
3074 }
3075
3076 static const struct file_operations trace_size_ops = {
3077 .owner = THIS_MODULE,
3078 .open = simple_open,
3079 .read = trace_buff_size_read,
3080 .write = trace_buff_size_write,
3081 };
3082
3083 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3084 struct ibmvnic_adapter *adapter)
3085 {
3086 struct device *dev = &adapter->vdev->dev;
3087 struct dentry *dir_ent;
3088 struct dentry *ent;
3089 int i;
3090
3091 debugfs_remove_recursive(adapter->ras_comps_ent);
3092
3093 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3094 adapter->debugfs_dir);
3095 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3096 dev_info(dev, "debugfs create ras_comps dir failed\n");
3097 return;
3098 }
3099
3100 for (i = 0; i < adapter->ras_comp_num; i++) {
3101 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3102 adapter->ras_comps_ent);
3103 if (!dir_ent || IS_ERR(dir_ent)) {
3104 dev_info(dev, "debugfs create %s dir failed\n",
3105 adapter->ras_comps[i].name);
3106 continue;
3107 }
3108
3109 adapter->ras_comp_int[i].adapter = adapter;
3110 adapter->ras_comp_int[i].num = i;
3111 adapter->ras_comp_int[i].desc_blob.data =
3112 &adapter->ras_comps[i].description;
3113 adapter->ras_comp_int[i].desc_blob.size =
3114 sizeof(adapter->ras_comps[i].description);
3115
3116 /* Don't need to remember the dentry's because the debugfs dir
3117 * gets removed recursively
3118 */
3119 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3120 &adapter->ras_comp_int[i].desc_blob);
3121 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3122 dir_ent, &adapter->ras_comp_int[i],
3123 &trace_size_ops);
3124 ent = debugfs_create_file("trace_level",
3125 S_IRUGO |
3126 (adapter->ras_comps[i].trace_level !=
3127 0xFF ? S_IWUSR : 0),
3128 dir_ent, &adapter->ras_comp_int[i],
3129 &trace_level_ops);
3130 ent = debugfs_create_file("error_level",
3131 S_IRUGO |
3132 (adapter->
3133 ras_comps[i].error_check_level !=
3134 0xFF ? S_IWUSR : 0),
3135 dir_ent, &adapter->ras_comp_int[i],
3136 &trace_level_ops);
3137 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3138 dir_ent, &adapter->ras_comp_int[i],
3139 &tracing_ops);
3140 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3141 dir_ent, &adapter->ras_comp_int[i],
3142 &paused_ops);
3143 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3144 &adapter->ras_comp_int[i],
3145 &trace_ops);
3146 }
3147 }
3148
3149 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3150 struct ibmvnic_adapter *adapter)
3151 {
3152 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3153 struct device *dev = &adapter->vdev->dev;
3154 union ibmvnic_crq newcrq;
3155
3156 adapter->ras_comps = dma_alloc_coherent(dev, len,
3157 &adapter->ras_comps_tok,
3158 GFP_KERNEL);
3159 if (!adapter->ras_comps) {
3160 if (!firmware_has_feature(FW_FEATURE_CMO))
3161 dev_err(dev, "Couldn't alloc fw comps buffer\n");
3162 return;
3163 }
3164
3165 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3166 sizeof(struct ibmvnic_fw_comp_internal),
3167 GFP_KERNEL);
3168 if (!adapter->ras_comp_int)
3169 dma_free_coherent(dev, len, adapter->ras_comps,
3170 adapter->ras_comps_tok);
3171
3172 memset(&newcrq, 0, sizeof(newcrq));
3173 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3174 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3175 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3176 newcrq.request_ras_comps.len = cpu_to_be32(len);
3177 ibmvnic_send_crq(adapter, &newcrq);
3178 }
3179
3180 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3181 {
3182 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3183 struct device *dev = &adapter->vdev->dev;
3184 struct ibmvnic_error_buff *error_buff, *tmp2;
3185 unsigned long flags;
3186 unsigned long flags2;
3187
3188 spin_lock_irqsave(&adapter->inflight_lock, flags);
3189 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3190 switch (inflight_cmd->crq.generic.cmd) {
3191 case LOGIN:
3192 dma_unmap_single(dev, adapter->login_buf_token,
3193 adapter->login_buf_sz,
3194 DMA_BIDIRECTIONAL);
3195 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3196 adapter->login_rsp_buf_sz,
3197 DMA_BIDIRECTIONAL);
3198 kfree(adapter->login_rsp_buf);
3199 kfree(adapter->login_buf);
3200 break;
3201 case REQUEST_DUMP:
3202 complete(&adapter->fw_done);
3203 break;
3204 case REQUEST_ERROR_INFO:
3205 spin_lock_irqsave(&adapter->error_list_lock, flags2);
3206 list_for_each_entry_safe(error_buff, tmp2,
3207 &adapter->errors, list) {
3208 dma_unmap_single(dev, error_buff->dma,
3209 error_buff->len,
3210 DMA_FROM_DEVICE);
3211 kfree(error_buff->buff);
3212 list_del(&error_buff->list);
3213 kfree(error_buff);
3214 }
3215 spin_unlock_irqrestore(&adapter->error_list_lock,
3216 flags2);
3217 break;
3218 }
3219 list_del(&inflight_cmd->list);
3220 kfree(inflight_cmd);
3221 }
3222 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3223 }
3224
3225 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3226 struct ibmvnic_adapter *adapter)
3227 {
3228 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3229 struct net_device *netdev = adapter->netdev;
3230 struct device *dev = &adapter->vdev->dev;
3231 long rc;
3232
3233 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3234 ((unsigned long int *)crq)[0],
3235 ((unsigned long int *)crq)[1]);
3236 switch (gen_crq->first) {
3237 case IBMVNIC_CRQ_INIT_RSP:
3238 switch (gen_crq->cmd) {
3239 case IBMVNIC_CRQ_INIT:
3240 dev_info(dev, "Partner initialized\n");
3241 /* Send back a response */
3242 rc = ibmvnic_send_crq_init_complete(adapter);
3243 if (!rc)
3244 schedule_work(&adapter->vnic_crq_init);
3245 else
3246 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3247 break;
3248 case IBMVNIC_CRQ_INIT_COMPLETE:
3249 dev_info(dev, "Partner initialization complete\n");
3250 send_version_xchg(adapter);
3251 break;
3252 default:
3253 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3254 }
3255 return;
3256 case IBMVNIC_CRQ_XPORT_EVENT:
3257 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3258 dev_info(dev, "Re-enabling adapter\n");
3259 adapter->migrated = true;
3260 ibmvnic_free_inflight(adapter);
3261 release_sub_crqs(adapter);
3262 rc = ibmvnic_reenable_crq_queue(adapter);
3263 if (rc)
3264 dev_err(dev, "Error after enable rc=%ld\n", rc);
3265 adapter->migrated = false;
3266 rc = ibmvnic_send_crq_init(adapter);
3267 if (rc)
3268 dev_err(dev, "Error sending init rc=%ld\n", rc);
3269 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3270 dev_info(dev, "Backing device failover detected\n");
3271 netif_carrier_off(netdev);
3272 adapter->failover = true;
3273 } else {
3274 /* The adapter lost the connection */
3275 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3276 gen_crq->cmd);
3277 ibmvnic_free_inflight(adapter);
3278 release_sub_crqs(adapter);
3279 }
3280 return;
3281 case IBMVNIC_CRQ_CMD_RSP:
3282 break;
3283 default:
3284 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3285 gen_crq->first);
3286 return;
3287 }
3288
3289 switch (gen_crq->cmd) {
3290 case VERSION_EXCHANGE_RSP:
3291 rc = crq->version_exchange_rsp.rc.code;
3292 if (rc) {
3293 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3294 break;
3295 }
3296 dev_info(dev, "Partner protocol version is %d\n",
3297 crq->version_exchange_rsp.version);
3298 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3299 ibmvnic_version)
3300 ibmvnic_version =
3301 be16_to_cpu(crq->version_exchange_rsp.version);
3302 send_cap_queries(adapter);
3303 break;
3304 case QUERY_CAPABILITY_RSP:
3305 handle_query_cap_rsp(crq, adapter);
3306 break;
3307 case QUERY_MAP_RSP:
3308 handle_query_map_rsp(crq, adapter);
3309 break;
3310 case REQUEST_MAP_RSP:
3311 handle_request_map_rsp(crq, adapter);
3312 break;
3313 case REQUEST_UNMAP_RSP:
3314 handle_request_unmap_rsp(crq, adapter);
3315 break;
3316 case REQUEST_CAPABILITY_RSP:
3317 handle_request_cap_rsp(crq, adapter);
3318 break;
3319 case LOGIN_RSP:
3320 netdev_dbg(netdev, "Got Login Response\n");
3321 handle_login_rsp(crq, adapter);
3322 break;
3323 case LOGICAL_LINK_STATE_RSP:
3324 netdev_dbg(netdev, "Got Logical Link State Response\n");
3325 adapter->logical_link_state =
3326 crq->logical_link_state_rsp.link_state;
3327 break;
3328 case LINK_STATE_INDICATION:
3329 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3330 adapter->phys_link_state =
3331 crq->link_state_indication.phys_link_state;
3332 adapter->logical_link_state =
3333 crq->link_state_indication.logical_link_state;
3334 break;
3335 case CHANGE_MAC_ADDR_RSP:
3336 netdev_dbg(netdev, "Got MAC address change Response\n");
3337 handle_change_mac_rsp(crq, adapter);
3338 break;
3339 case ERROR_INDICATION:
3340 netdev_dbg(netdev, "Got Error Indication\n");
3341 handle_error_indication(crq, adapter);
3342 break;
3343 case REQUEST_ERROR_RSP:
3344 netdev_dbg(netdev, "Got Error Detail Response\n");
3345 handle_error_info_rsp(crq, adapter);
3346 break;
3347 case REQUEST_STATISTICS_RSP:
3348 netdev_dbg(netdev, "Got Statistics Response\n");
3349 complete(&adapter->stats_done);
3350 break;
3351 case REQUEST_DUMP_SIZE_RSP:
3352 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3353 handle_dump_size_rsp(crq, adapter);
3354 break;
3355 case REQUEST_DUMP_RSP:
3356 netdev_dbg(netdev, "Got Request Dump Response\n");
3357 complete(&adapter->fw_done);
3358 break;
3359 case QUERY_IP_OFFLOAD_RSP:
3360 netdev_dbg(netdev, "Got Query IP offload Response\n");
3361 handle_query_ip_offload_rsp(adapter);
3362 break;
3363 case MULTICAST_CTRL_RSP:
3364 netdev_dbg(netdev, "Got multicast control Response\n");
3365 break;
3366 case CONTROL_IP_OFFLOAD_RSP:
3367 netdev_dbg(netdev, "Got Control IP offload Response\n");
3368 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3369 sizeof(adapter->ip_offload_ctrl),
3370 DMA_TO_DEVICE);
3371 /* We're done with the queries, perform the login */
3372 send_login(adapter);
3373 break;
3374 case REQUEST_RAS_COMP_NUM_RSP:
3375 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3376 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3377 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3378 break;
3379 }
3380 adapter->ras_comp_num =
3381 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3382 handle_request_ras_comp_num_rsp(crq, adapter);
3383 break;
3384 case REQUEST_RAS_COMPS_RSP:
3385 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3386 handle_request_ras_comps_rsp(crq, adapter);
3387 break;
3388 case CONTROL_RAS_RSP:
3389 netdev_dbg(netdev, "Got Control RAS Response\n");
3390 handle_control_ras_rsp(crq, adapter);
3391 break;
3392 case COLLECT_FW_TRACE_RSP:
3393 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3394 complete(&adapter->fw_done);
3395 break;
3396 default:
3397 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3398 gen_crq->cmd);
3399 }
3400 }
3401
3402 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3403 {
3404 struct ibmvnic_adapter *adapter = instance;
3405 struct ibmvnic_crq_queue *queue = &adapter->crq;
3406 struct vio_dev *vdev = adapter->vdev;
3407 union ibmvnic_crq *crq;
3408 unsigned long flags;
3409 bool done = false;
3410
3411 spin_lock_irqsave(&queue->lock, flags);
3412 vio_disable_interrupts(vdev);
3413 while (!done) {
3414 /* Pull all the valid messages off the CRQ */
3415 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3416 ibmvnic_handle_crq(crq, adapter);
3417 crq->generic.first = 0;
3418 }
3419 vio_enable_interrupts(vdev);
3420 crq = ibmvnic_next_crq(adapter);
3421 if (crq) {
3422 vio_disable_interrupts(vdev);
3423 ibmvnic_handle_crq(crq, adapter);
3424 crq->generic.first = 0;
3425 } else {
3426 done = true;
3427 }
3428 }
3429 spin_unlock_irqrestore(&queue->lock, flags);
3430 return IRQ_HANDLED;
3431 }
3432
3433 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3434 {
3435 struct vio_dev *vdev = adapter->vdev;
3436 int rc;
3437
3438 do {
3439 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3440 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3441
3442 if (rc)
3443 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3444
3445 return rc;
3446 }
3447
3448 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3449 {
3450 struct ibmvnic_crq_queue *crq = &adapter->crq;
3451 struct device *dev = &adapter->vdev->dev;
3452 struct vio_dev *vdev = adapter->vdev;
3453 int rc;
3454
3455 /* Close the CRQ */
3456 do {
3457 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3458 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3459
3460 /* Clean out the queue */
3461 memset(crq->msgs, 0, PAGE_SIZE);
3462 crq->cur = 0;
3463
3464 /* And re-open it again */
3465 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3466 crq->msg_token, PAGE_SIZE);
3467
3468 if (rc == H_CLOSED)
3469 /* Adapter is good, but other end is not ready */
3470 dev_warn(dev, "Partner adapter not ready\n");
3471 else if (rc != 0)
3472 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3473
3474 return rc;
3475 }
3476
3477 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3478 {
3479 struct ibmvnic_crq_queue *crq = &adapter->crq;
3480 struct vio_dev *vdev = adapter->vdev;
3481 long rc;
3482
3483 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3484 free_irq(vdev->irq, adapter);
3485 do {
3486 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3487 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3488
3489 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3490 DMA_BIDIRECTIONAL);
3491 free_page((unsigned long)crq->msgs);
3492 }
3493
3494 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3495 {
3496 struct ibmvnic_crq_queue *crq = &adapter->crq;
3497 struct device *dev = &adapter->vdev->dev;
3498 struct vio_dev *vdev = adapter->vdev;
3499 int rc, retrc = -ENOMEM;
3500
3501 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3502 /* Should we allocate more than one page? */
3503
3504 if (!crq->msgs)
3505 return -ENOMEM;
3506
3507 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3508 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3509 DMA_BIDIRECTIONAL);
3510 if (dma_mapping_error(dev, crq->msg_token))
3511 goto map_failed;
3512
3513 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3514 crq->msg_token, PAGE_SIZE);
3515
3516 if (rc == H_RESOURCE)
3517 /* maybe kexecing and resource is busy. try a reset */
3518 rc = ibmvnic_reset_crq(adapter);
3519 retrc = rc;
3520
3521 if (rc == H_CLOSED) {
3522 dev_warn(dev, "Partner adapter not ready\n");
3523 } else if (rc) {
3524 dev_warn(dev, "Error %d opening adapter\n", rc);
3525 goto reg_crq_failed;
3526 }
3527
3528 retrc = 0;
3529
3530 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3531 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3532 adapter);
3533 if (rc) {
3534 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3535 vdev->irq, rc);
3536 goto req_irq_failed;
3537 }
3538
3539 rc = vio_enable_interrupts(vdev);
3540 if (rc) {
3541 dev_err(dev, "Error %d enabling interrupts\n", rc);
3542 goto req_irq_failed;
3543 }
3544
3545 crq->cur = 0;
3546 spin_lock_init(&crq->lock);
3547
3548 return retrc;
3549
3550 req_irq_failed:
3551 do {
3552 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3553 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3554 reg_crq_failed:
3555 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3556 map_failed:
3557 free_page((unsigned long)crq->msgs);
3558 return retrc;
3559 }
3560
3561 /* debugfs for dump */
3562 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3563 {
3564 struct net_device *netdev = seq->private;
3565 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3566 struct device *dev = &adapter->vdev->dev;
3567 union ibmvnic_crq crq;
3568
3569 memset(&crq, 0, sizeof(crq));
3570 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3571 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3572 ibmvnic_send_crq(adapter, &crq);
3573
3574 init_completion(&adapter->fw_done);
3575 wait_for_completion(&adapter->fw_done);
3576
3577 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3578
3579 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3580 DMA_BIDIRECTIONAL);
3581
3582 kfree(adapter->dump_data);
3583
3584 return 0;
3585 }
3586
3587 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3588 {
3589 return single_open(file, ibmvnic_dump_show, inode->i_private);
3590 }
3591
3592 static const struct file_operations ibmvnic_dump_ops = {
3593 .owner = THIS_MODULE,
3594 .open = ibmvnic_dump_open,
3595 .read = seq_read,
3596 .llseek = seq_lseek,
3597 .release = single_release,
3598 };
3599
3600 static void handle_crq_init_rsp(struct work_struct *work)
3601 {
3602 struct ibmvnic_adapter *adapter = container_of(work,
3603 struct ibmvnic_adapter,
3604 vnic_crq_init);
3605 struct device *dev = &adapter->vdev->dev;
3606 struct net_device *netdev = adapter->netdev;
3607 unsigned long timeout = msecs_to_jiffies(30000);
3608 bool restart = false;
3609 int rc;
3610
3611 if (adapter->failover) {
3612 release_sub_crqs(adapter);
3613 if (netif_running(netdev)) {
3614 netif_tx_disable(netdev);
3615 ibmvnic_close(netdev);
3616 restart = true;
3617 }
3618 }
3619
3620 send_version_xchg(adapter);
3621 reinit_completion(&adapter->init_done);
3622 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3623 dev_err(dev, "Passive init timeout\n");
3624 goto task_failed;
3625 }
3626
3627 do {
3628 if (adapter->renegotiate) {
3629 adapter->renegotiate = false;
3630 release_sub_crqs_no_irqs(adapter);
3631 send_cap_queries(adapter);
3632
3633 reinit_completion(&adapter->init_done);
3634 if (!wait_for_completion_timeout(&adapter->init_done,
3635 timeout)) {
3636 dev_err(dev, "Passive init timeout\n");
3637 goto task_failed;
3638 }
3639 }
3640 } while (adapter->renegotiate);
3641 rc = init_sub_crq_irqs(adapter);
3642
3643 if (rc)
3644 goto task_failed;
3645
3646 netdev->real_num_tx_queues = adapter->req_tx_queues;
3647 netdev->min_mtu = adapter->min_mtu;
3648 netdev->max_mtu = adapter->max_mtu;
3649
3650 if (adapter->failover) {
3651 adapter->failover = false;
3652 if (restart) {
3653 rc = ibmvnic_open(netdev);
3654 if (rc)
3655 goto restart_failed;
3656 }
3657 netif_carrier_on(netdev);
3658 return;
3659 }
3660
3661 rc = register_netdev(netdev);
3662 if (rc) {
3663 dev_err(dev,
3664 "failed to register netdev rc=%d\n", rc);
3665 goto register_failed;
3666 }
3667 dev_info(dev, "ibmvnic registered\n");
3668
3669 return;
3670
3671 restart_failed:
3672 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3673 register_failed:
3674 release_sub_crqs(adapter);
3675 task_failed:
3676 dev_err(dev, "Passive initialization was not successful\n");
3677 }
3678
3679 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3680 {
3681 unsigned long timeout = msecs_to_jiffies(30000);
3682 struct ibmvnic_adapter *adapter;
3683 struct net_device *netdev;
3684 unsigned char *mac_addr_p;
3685 struct dentry *ent;
3686 char buf[16]; /* debugfs name buf */
3687 int rc;
3688
3689 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3690 dev->unit_address);
3691
3692 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3693 VETH_MAC_ADDR, NULL);
3694 if (!mac_addr_p) {
3695 dev_err(&dev->dev,
3696 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3697 __FILE__, __LINE__);
3698 return 0;
3699 }
3700
3701 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3702 IBMVNIC_MAX_TX_QUEUES);
3703 if (!netdev)
3704 return -ENOMEM;
3705
3706 adapter = netdev_priv(netdev);
3707 dev_set_drvdata(&dev->dev, netdev);
3708 adapter->vdev = dev;
3709 adapter->netdev = netdev;
3710 adapter->failover = false;
3711
3712 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3713 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3714 netdev->irq = dev->irq;
3715 netdev->netdev_ops = &ibmvnic_netdev_ops;
3716 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3717 SET_NETDEV_DEV(netdev, &dev->dev);
3718
3719 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3720
3721 spin_lock_init(&adapter->stats_lock);
3722
3723 rc = ibmvnic_init_crq_queue(adapter);
3724 if (rc) {
3725 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3726 goto free_netdev;
3727 }
3728
3729 INIT_LIST_HEAD(&adapter->errors);
3730 INIT_LIST_HEAD(&adapter->inflight);
3731 spin_lock_init(&adapter->error_list_lock);
3732 spin_lock_init(&adapter->inflight_lock);
3733
3734 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3735 sizeof(struct ibmvnic_statistics),
3736 DMA_FROM_DEVICE);
3737 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3738 if (!firmware_has_feature(FW_FEATURE_CMO))
3739 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3740 rc = -ENOMEM;
3741 goto free_crq;
3742 }
3743
3744 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3745 ent = debugfs_create_dir(buf, NULL);
3746 if (!ent || IS_ERR(ent)) {
3747 dev_info(&dev->dev, "debugfs create directory failed\n");
3748 adapter->debugfs_dir = NULL;
3749 } else {
3750 adapter->debugfs_dir = ent;
3751 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3752 netdev, &ibmvnic_dump_ops);
3753 if (!ent || IS_ERR(ent)) {
3754 dev_info(&dev->dev,
3755 "debugfs create dump file failed\n");
3756 adapter->debugfs_dump = NULL;
3757 } else {
3758 adapter->debugfs_dump = ent;
3759 }
3760 }
3761 ibmvnic_send_crq_init(adapter);
3762
3763 init_completion(&adapter->init_done);
3764 if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3765 return 0;
3766
3767 do {
3768 if (adapter->renegotiate) {
3769 adapter->renegotiate = false;
3770 release_sub_crqs_no_irqs(adapter);
3771 send_cap_queries(adapter);
3772
3773 reinit_completion(&adapter->init_done);
3774 if (!wait_for_completion_timeout(&adapter->init_done,
3775 timeout))
3776 return 0;
3777 }
3778 } while (adapter->renegotiate);
3779
3780 rc = init_sub_crq_irqs(adapter);
3781 if (rc) {
3782 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3783 goto free_debugfs;
3784 }
3785
3786 netdev->real_num_tx_queues = adapter->req_tx_queues;
3787
3788 rc = register_netdev(netdev);
3789 if (rc) {
3790 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3791 goto free_sub_crqs;
3792 }
3793 dev_info(&dev->dev, "ibmvnic registered\n");
3794
3795 return 0;
3796
3797 free_sub_crqs:
3798 release_sub_crqs(adapter);
3799 free_debugfs:
3800 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3801 debugfs_remove_recursive(adapter->debugfs_dir);
3802 free_crq:
3803 ibmvnic_release_crq_queue(adapter);
3804 free_netdev:
3805 free_netdev(netdev);
3806 return rc;
3807 }
3808
3809 static int ibmvnic_remove(struct vio_dev *dev)
3810 {
3811 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3812 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3813
3814 unregister_netdev(netdev);
3815
3816 release_sub_crqs(adapter);
3817
3818 ibmvnic_release_crq_queue(adapter);
3819
3820 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3821 debugfs_remove_recursive(adapter->debugfs_dir);
3822
3823 if (adapter->ras_comps)
3824 dma_free_coherent(&dev->dev,
3825 adapter->ras_comp_num *
3826 sizeof(struct ibmvnic_fw_component),
3827 adapter->ras_comps, adapter->ras_comps_tok);
3828
3829 kfree(adapter->ras_comp_int);
3830
3831 free_netdev(netdev);
3832 dev_set_drvdata(&dev->dev, NULL);
3833
3834 return 0;
3835 }
3836
3837 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3838 {
3839 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3840 struct ibmvnic_adapter *adapter;
3841 struct iommu_table *tbl;
3842 unsigned long ret = 0;
3843 int i;
3844
3845 tbl = get_iommu_table_base(&vdev->dev);
3846
3847 /* netdev inits at probe time along with the structures we need below*/
3848 if (!netdev)
3849 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3850
3851 adapter = netdev_priv(netdev);
3852
3853 ret += PAGE_SIZE; /* the crq message queue */
3854 ret += adapter->bounce_buffer_size;
3855 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3856
3857 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3858 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3859
3860 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3861 i++)
3862 ret += adapter->rx_pool[i].size *
3863 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3864
3865 return ret;
3866 }
3867
3868 static int ibmvnic_resume(struct device *dev)
3869 {
3870 struct net_device *netdev = dev_get_drvdata(dev);
3871 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3872 int i;
3873
3874 /* kick the interrupt handlers just in case we lost an interrupt */
3875 for (i = 0; i < adapter->req_rx_queues; i++)
3876 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3877 adapter->rx_scrq[i]);
3878
3879 return 0;
3880 }
3881
3882 static struct vio_device_id ibmvnic_device_table[] = {
3883 {"network", "IBM,vnic"},
3884 {"", "" }
3885 };
3886 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3887
3888 static const struct dev_pm_ops ibmvnic_pm_ops = {
3889 .resume = ibmvnic_resume
3890 };
3891
3892 static struct vio_driver ibmvnic_driver = {
3893 .id_table = ibmvnic_device_table,
3894 .probe = ibmvnic_probe,
3895 .remove = ibmvnic_remove,
3896 .get_desired_dma = ibmvnic_get_desired_dma,
3897 .name = ibmvnic_driver_name,
3898 .pm = &ibmvnic_pm_ops,
3899 };
3900
3901 /* module functions */
3902 static int __init ibmvnic_module_init(void)
3903 {
3904 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3905 IBMVNIC_DRIVER_VERSION);
3906
3907 return vio_register_driver(&ibmvnic_driver);
3908 }
3909
3910 static void __exit ibmvnic_module_exit(void)
3911 {
3912 vio_unregister_driver(&ibmvnic_driver);
3913 }
3914
3915 module_init(ibmvnic_module_init);
3916 module_exit(ibmvnic_module_exit);
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