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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / drivers / net / ethernet / ibm / ibmvnic.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /**************************************************************************/
3 /* */
4 /* IBM System i and System p Virtual NIC Device Driver */
5 /* Copyright (C) 2014 IBM Corp. */
6 /* Santiago Leon (santi_leon@yahoo.com) */
7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8 /* John Allen (jallen@linux.vnet.ibm.com) */
9 /* */
10 /* */
11 /* This module contains the implementation of a virtual ethernet device */
12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13 /* option of the RS/6000 Platform Architecture to interface with virtual */
14 /* ethernet NICs that are presented to the partition by the hypervisor. */
15 /* */
16 /* Messages are passed between the VNIC driver and the VNIC server using */
17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18 /* issue and receive commands that initiate communication with the server */
19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20 /* are used by the driver to notify the server that a packet is */
21 /* ready for transmission or that a buffer has been added to receive a */
22 /* packet. Subsequently, sCRQs are used by the server to notify the */
23 /* driver that a packet transmission has been completed or that a packet */
24 /* has been received and placed in a waiting buffer. */
25 /* */
26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27 /* which skbs are DMA mapped and immediately unmapped when the transmit */
28 /* or receive has been completed, the VNIC driver is required to use */
29 /* "long term mapping". This entails that large, continuous DMA mapped */
30 /* buffers are allocated on driver initialization and these buffers are */
31 /* then continuously reused to pass skbs to and from the VNIC server. */
32 /* */
33 /**************************************************************************/
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/completion.h>
40 #include <linux/ioport.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kernel.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/init.h>
47 #include <linux/delay.h>
48 #include <linux/mm.h>
49 #include <linux/ethtool.h>
50 #include <linux/proc_fs.h>
51 #include <linux/if_arp.h>
52 #include <linux/in.h>
53 #include <linux/ip.h>
54 #include <linux/ipv6.h>
55 #include <linux/irq.h>
56 #include <linux/kthread.h>
57 #include <linux/seq_file.h>
58 #include <linux/interrupt.h>
59 #include <net/net_namespace.h>
60 #include <asm/hvcall.h>
61 #include <linux/atomic.h>
62 #include <asm/vio.h>
63 #include <asm/iommu.h>
64 #include <linux/uaccess.h>
65 #include <asm/firmware.h>
66 #include <linux/workqueue.h>
67 #include <linux/if_vlan.h>
68 #include <linux/utsname.h>
69
70 #include "ibmvnic.h"
71
72 static const char ibmvnic_driver_name[] = "ibmvnic";
73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
74
75 MODULE_AUTHOR("Santiago Leon");
76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77 MODULE_LICENSE("GPL");
78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
79
80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81 static int ibmvnic_remove(struct vio_dev *);
82 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
88 union sub_crq *sub_crq);
89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
91 static int enable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93 static int disable_scrq_irq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95 static int pending_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
98 struct ibmvnic_sub_crq_queue *);
99 static int ibmvnic_poll(struct napi_struct *napi, int data);
100 static void send_map_query(struct ibmvnic_adapter *adapter);
101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
102 static int send_request_unmap(struct ibmvnic_adapter *, u8);
103 static int send_login(struct ibmvnic_adapter *adapter);
104 static void send_cap_queries(struct ibmvnic_adapter *adapter);
105 static int init_sub_crqs(struct ibmvnic_adapter *);
106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
107 static int ibmvnic_init(struct ibmvnic_adapter *);
108 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
109 static void release_crq_queue(struct ibmvnic_adapter *);
110 static int __ibmvnic_set_mac(struct net_device *, u8 *);
111 static int init_crq_queue(struct ibmvnic_adapter *adapter);
112 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
113
114 struct ibmvnic_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117 };
118
119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
120 offsetof(struct ibmvnic_statistics, stat))
121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
122
123 static const struct ibmvnic_stat ibmvnic_stats[] = {
124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
146 };
147
148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
149 unsigned long length, unsigned long *number,
150 unsigned long *irq)
151 {
152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
153 long rc;
154
155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
156 *number = retbuf[0];
157 *irq = retbuf[1];
158
159 return rc;
160 }
161
162 /**
163 * ibmvnic_wait_for_completion - Check device state and wait for completion
164 * @adapter: private device data
165 * @comp_done: completion structure to wait for
166 * @timeout: time to wait in milliseconds
167 *
168 * Wait for a completion signal or until the timeout limit is reached
169 * while checking that the device is still active.
170 */
171 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
172 struct completion *comp_done,
173 unsigned long timeout)
174 {
175 struct net_device *netdev;
176 unsigned long div_timeout;
177 u8 retry;
178
179 netdev = adapter->netdev;
180 retry = 5;
181 div_timeout = msecs_to_jiffies(timeout / retry);
182 while (true) {
183 if (!adapter->crq.active) {
184 netdev_err(netdev, "Device down!\n");
185 return -ENODEV;
186 }
187 if (!retry--)
188 break;
189 if (wait_for_completion_timeout(comp_done, div_timeout))
190 return 0;
191 }
192 netdev_err(netdev, "Operation timed out.\n");
193 return -ETIMEDOUT;
194 }
195
196 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb, int size)
198 {
199 struct device *dev = &adapter->vdev->dev;
200 int rc;
201
202 ltb->size = size;
203 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
204 GFP_KERNEL);
205
206 if (!ltb->buff) {
207 dev_err(dev, "Couldn't alloc long term buffer\n");
208 return -ENOMEM;
209 }
210 ltb->map_id = adapter->map_id;
211 adapter->map_id++;
212
213 mutex_lock(&adapter->fw_lock);
214 adapter->fw_done_rc = 0;
215 reinit_completion(&adapter->fw_done);
216 rc = send_request_map(adapter, ltb->addr,
217 ltb->size, ltb->map_id);
218 if (rc) {
219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
220 mutex_unlock(&adapter->fw_lock);
221 return rc;
222 }
223
224 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
225 if (rc) {
226 dev_err(dev,
227 "Long term map request aborted or timed out,rc = %d\n",
228 rc);
229 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
230 mutex_unlock(&adapter->fw_lock);
231 return rc;
232 }
233
234 if (adapter->fw_done_rc) {
235 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
236 adapter->fw_done_rc);
237 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
238 mutex_unlock(&adapter->fw_lock);
239 return -1;
240 }
241 mutex_unlock(&adapter->fw_lock);
242 return 0;
243 }
244
245 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
246 struct ibmvnic_long_term_buff *ltb)
247 {
248 struct device *dev = &adapter->vdev->dev;
249
250 if (!ltb->buff)
251 return;
252
253 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
254 adapter->reset_reason != VNIC_RESET_MOBILITY)
255 send_request_unmap(adapter, ltb->map_id);
256 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
257 }
258
259 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
260 struct ibmvnic_long_term_buff *ltb)
261 {
262 struct device *dev = &adapter->vdev->dev;
263 int rc;
264
265 memset(ltb->buff, 0, ltb->size);
266
267 mutex_lock(&adapter->fw_lock);
268 adapter->fw_done_rc = 0;
269
270 reinit_completion(&adapter->fw_done);
271 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
272 if (rc) {
273 mutex_unlock(&adapter->fw_lock);
274 return rc;
275 }
276
277 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
278 if (rc) {
279 dev_info(dev,
280 "Reset failed, long term map request timed out or aborted\n");
281 mutex_unlock(&adapter->fw_lock);
282 return rc;
283 }
284
285 if (adapter->fw_done_rc) {
286 dev_info(dev,
287 "Reset failed, attempting to free and reallocate buffer\n");
288 free_long_term_buff(adapter, ltb);
289 mutex_unlock(&adapter->fw_lock);
290 return alloc_long_term_buff(adapter, ltb, ltb->size);
291 }
292 mutex_unlock(&adapter->fw_lock);
293 return 0;
294 }
295
296 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
297 {
298 int i;
299
300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
301 i++)
302 adapter->rx_pool[i].active = 0;
303 }
304
305 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
306 struct ibmvnic_rx_pool *pool)
307 {
308 int count = pool->size - atomic_read(&pool->available);
309 struct device *dev = &adapter->vdev->dev;
310 int buffers_added = 0;
311 unsigned long lpar_rc;
312 union sub_crq sub_crq;
313 struct sk_buff *skb;
314 unsigned int offset;
315 dma_addr_t dma_addr;
316 unsigned char *dst;
317 u64 *handle_array;
318 int shift = 0;
319 int index;
320 int i;
321
322 if (!pool->active)
323 return;
324
325 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
326 be32_to_cpu(adapter->login_rsp_buf->
327 off_rxadd_subcrqs));
328
329 for (i = 0; i < count; ++i) {
330 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
331 if (!skb) {
332 dev_err(dev, "Couldn't replenish rx buff\n");
333 adapter->replenish_no_mem++;
334 break;
335 }
336
337 index = pool->free_map[pool->next_free];
338
339 if (pool->rx_buff[index].skb)
340 dev_err(dev, "Inconsistent free_map!\n");
341
342 /* Copy the skb to the long term mapped DMA buffer */
343 offset = index * pool->buff_size;
344 dst = pool->long_term_buff.buff + offset;
345 memset(dst, 0, pool->buff_size);
346 dma_addr = pool->long_term_buff.addr + offset;
347 pool->rx_buff[index].data = dst;
348
349 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
350 pool->rx_buff[index].dma = dma_addr;
351 pool->rx_buff[index].skb = skb;
352 pool->rx_buff[index].pool_index = pool->index;
353 pool->rx_buff[index].size = pool->buff_size;
354
355 memset(&sub_crq, 0, sizeof(sub_crq));
356 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
357 sub_crq.rx_add.correlator =
358 cpu_to_be64((u64)&pool->rx_buff[index]);
359 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
360 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
361
362 /* The length field of the sCRQ is defined to be 24 bits so the
363 * buffer size needs to be left shifted by a byte before it is
364 * converted to big endian to prevent the last byte from being
365 * truncated.
366 */
367 #ifdef __LITTLE_ENDIAN__
368 shift = 8;
369 #endif
370 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
371
372 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
373 &sub_crq);
374 if (lpar_rc != H_SUCCESS)
375 goto failure;
376
377 buffers_added++;
378 adapter->replenish_add_buff_success++;
379 pool->next_free = (pool->next_free + 1) % pool->size;
380 }
381 atomic_add(buffers_added, &pool->available);
382 return;
383
384 failure:
385 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
386 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
387 pool->free_map[pool->next_free] = index;
388 pool->rx_buff[index].skb = NULL;
389
390 dev_kfree_skb_any(skb);
391 adapter->replenish_add_buff_failure++;
392 atomic_add(buffers_added, &pool->available);
393
394 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
395 /* Disable buffer pool replenishment and report carrier off if
396 * queue is closed or pending failover.
397 * Firmware guarantees that a signal will be sent to the
398 * driver, triggering a reset.
399 */
400 deactivate_rx_pools(adapter);
401 netif_carrier_off(adapter->netdev);
402 }
403 }
404
405 static void replenish_pools(struct ibmvnic_adapter *adapter)
406 {
407 int i;
408
409 adapter->replenish_task_cycles++;
410 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
411 i++) {
412 if (adapter->rx_pool[i].active)
413 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
414 }
415 }
416
417 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
418 {
419 kfree(adapter->tx_stats_buffers);
420 kfree(adapter->rx_stats_buffers);
421 adapter->tx_stats_buffers = NULL;
422 adapter->rx_stats_buffers = NULL;
423 }
424
425 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
426 {
427 adapter->tx_stats_buffers =
428 kcalloc(IBMVNIC_MAX_QUEUES,
429 sizeof(struct ibmvnic_tx_queue_stats),
430 GFP_KERNEL);
431 if (!adapter->tx_stats_buffers)
432 return -ENOMEM;
433
434 adapter->rx_stats_buffers =
435 kcalloc(IBMVNIC_MAX_QUEUES,
436 sizeof(struct ibmvnic_rx_queue_stats),
437 GFP_KERNEL);
438 if (!adapter->rx_stats_buffers)
439 return -ENOMEM;
440
441 return 0;
442 }
443
444 static void release_stats_token(struct ibmvnic_adapter *adapter)
445 {
446 struct device *dev = &adapter->vdev->dev;
447
448 if (!adapter->stats_token)
449 return;
450
451 dma_unmap_single(dev, adapter->stats_token,
452 sizeof(struct ibmvnic_statistics),
453 DMA_FROM_DEVICE);
454 adapter->stats_token = 0;
455 }
456
457 static int init_stats_token(struct ibmvnic_adapter *adapter)
458 {
459 struct device *dev = &adapter->vdev->dev;
460 dma_addr_t stok;
461
462 stok = dma_map_single(dev, &adapter->stats,
463 sizeof(struct ibmvnic_statistics),
464 DMA_FROM_DEVICE);
465 if (dma_mapping_error(dev, stok)) {
466 dev_err(dev, "Couldn't map stats buffer\n");
467 return -1;
468 }
469
470 adapter->stats_token = stok;
471 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
472 return 0;
473 }
474
475 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
476 {
477 struct ibmvnic_rx_pool *rx_pool;
478 int rx_scrqs;
479 int i, j, rc;
480 u64 *size_array;
481
482 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
483 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
484
485 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
486 for (i = 0; i < rx_scrqs; i++) {
487 rx_pool = &adapter->rx_pool[i];
488
489 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
490
491 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
492 free_long_term_buff(adapter, &rx_pool->long_term_buff);
493 rx_pool->buff_size = be64_to_cpu(size_array[i]);
494 rc = alloc_long_term_buff(adapter,
495 &rx_pool->long_term_buff,
496 rx_pool->size *
497 rx_pool->buff_size);
498 } else {
499 rc = reset_long_term_buff(adapter,
500 &rx_pool->long_term_buff);
501 }
502
503 if (rc)
504 return rc;
505
506 for (j = 0; j < rx_pool->size; j++)
507 rx_pool->free_map[j] = j;
508
509 memset(rx_pool->rx_buff, 0,
510 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
511
512 atomic_set(&rx_pool->available, 0);
513 rx_pool->next_alloc = 0;
514 rx_pool->next_free = 0;
515 rx_pool->active = 1;
516 }
517
518 return 0;
519 }
520
521 static void release_rx_pools(struct ibmvnic_adapter *adapter)
522 {
523 struct ibmvnic_rx_pool *rx_pool;
524 int i, j;
525
526 if (!adapter->rx_pool)
527 return;
528
529 for (i = 0; i < adapter->num_active_rx_pools; i++) {
530 rx_pool = &adapter->rx_pool[i];
531
532 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
533
534 kfree(rx_pool->free_map);
535 free_long_term_buff(adapter, &rx_pool->long_term_buff);
536
537 if (!rx_pool->rx_buff)
538 continue;
539
540 for (j = 0; j < rx_pool->size; j++) {
541 if (rx_pool->rx_buff[j].skb) {
542 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
543 rx_pool->rx_buff[j].skb = NULL;
544 }
545 }
546
547 kfree(rx_pool->rx_buff);
548 }
549
550 kfree(adapter->rx_pool);
551 adapter->rx_pool = NULL;
552 adapter->num_active_rx_pools = 0;
553 }
554
555 static int init_rx_pools(struct net_device *netdev)
556 {
557 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
558 struct device *dev = &adapter->vdev->dev;
559 struct ibmvnic_rx_pool *rx_pool;
560 int rxadd_subcrqs;
561 u64 *size_array;
562 int i, j;
563
564 rxadd_subcrqs =
565 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
566 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
567 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
568
569 adapter->rx_pool = kcalloc(rxadd_subcrqs,
570 sizeof(struct ibmvnic_rx_pool),
571 GFP_KERNEL);
572 if (!adapter->rx_pool) {
573 dev_err(dev, "Failed to allocate rx pools\n");
574 return -1;
575 }
576
577 adapter->num_active_rx_pools = rxadd_subcrqs;
578
579 for (i = 0; i < rxadd_subcrqs; i++) {
580 rx_pool = &adapter->rx_pool[i];
581
582 netdev_dbg(adapter->netdev,
583 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
584 i, adapter->req_rx_add_entries_per_subcrq,
585 be64_to_cpu(size_array[i]));
586
587 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
588 rx_pool->index = i;
589 rx_pool->buff_size = be64_to_cpu(size_array[i]);
590 rx_pool->active = 1;
591
592 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
593 GFP_KERNEL);
594 if (!rx_pool->free_map) {
595 release_rx_pools(adapter);
596 return -1;
597 }
598
599 rx_pool->rx_buff = kcalloc(rx_pool->size,
600 sizeof(struct ibmvnic_rx_buff),
601 GFP_KERNEL);
602 if (!rx_pool->rx_buff) {
603 dev_err(dev, "Couldn't alloc rx buffers\n");
604 release_rx_pools(adapter);
605 return -1;
606 }
607
608 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
609 rx_pool->size * rx_pool->buff_size)) {
610 release_rx_pools(adapter);
611 return -1;
612 }
613
614 for (j = 0; j < rx_pool->size; ++j)
615 rx_pool->free_map[j] = j;
616
617 atomic_set(&rx_pool->available, 0);
618 rx_pool->next_alloc = 0;
619 rx_pool->next_free = 0;
620 }
621
622 return 0;
623 }
624
625 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
626 struct ibmvnic_tx_pool *tx_pool)
627 {
628 int rc, i;
629
630 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
631 if (rc)
632 return rc;
633
634 memset(tx_pool->tx_buff, 0,
635 tx_pool->num_buffers *
636 sizeof(struct ibmvnic_tx_buff));
637
638 for (i = 0; i < tx_pool->num_buffers; i++)
639 tx_pool->free_map[i] = i;
640
641 tx_pool->consumer_index = 0;
642 tx_pool->producer_index = 0;
643
644 return 0;
645 }
646
647 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
648 {
649 int tx_scrqs;
650 int i, rc;
651
652 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
653 for (i = 0; i < tx_scrqs; i++) {
654 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
655 if (rc)
656 return rc;
657 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
658 if (rc)
659 return rc;
660 }
661
662 return 0;
663 }
664
665 static void release_vpd_data(struct ibmvnic_adapter *adapter)
666 {
667 if (!adapter->vpd)
668 return;
669
670 kfree(adapter->vpd->buff);
671 kfree(adapter->vpd);
672
673 adapter->vpd = NULL;
674 }
675
676 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
677 struct ibmvnic_tx_pool *tx_pool)
678 {
679 kfree(tx_pool->tx_buff);
680 kfree(tx_pool->free_map);
681 free_long_term_buff(adapter, &tx_pool->long_term_buff);
682 }
683
684 static void release_tx_pools(struct ibmvnic_adapter *adapter)
685 {
686 int i;
687
688 if (!adapter->tx_pool)
689 return;
690
691 for (i = 0; i < adapter->num_active_tx_pools; i++) {
692 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
693 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
694 }
695
696 kfree(adapter->tx_pool);
697 adapter->tx_pool = NULL;
698 kfree(adapter->tso_pool);
699 adapter->tso_pool = NULL;
700 adapter->num_active_tx_pools = 0;
701 }
702
703 static int init_one_tx_pool(struct net_device *netdev,
704 struct ibmvnic_tx_pool *tx_pool,
705 int num_entries, int buf_size)
706 {
707 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
708 int i;
709
710 tx_pool->tx_buff = kcalloc(num_entries,
711 sizeof(struct ibmvnic_tx_buff),
712 GFP_KERNEL);
713 if (!tx_pool->tx_buff)
714 return -1;
715
716 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
717 num_entries * buf_size))
718 return -1;
719
720 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
721 if (!tx_pool->free_map)
722 return -1;
723
724 for (i = 0; i < num_entries; i++)
725 tx_pool->free_map[i] = i;
726
727 tx_pool->consumer_index = 0;
728 tx_pool->producer_index = 0;
729 tx_pool->num_buffers = num_entries;
730 tx_pool->buf_size = buf_size;
731
732 return 0;
733 }
734
735 static int init_tx_pools(struct net_device *netdev)
736 {
737 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
738 int tx_subcrqs;
739 int i, rc;
740
741 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
742 adapter->tx_pool = kcalloc(tx_subcrqs,
743 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
744 if (!adapter->tx_pool)
745 return -1;
746
747 adapter->tso_pool = kcalloc(tx_subcrqs,
748 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
749 if (!adapter->tso_pool)
750 return -1;
751
752 adapter->num_active_tx_pools = tx_subcrqs;
753
754 for (i = 0; i < tx_subcrqs; i++) {
755 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
756 adapter->req_tx_entries_per_subcrq,
757 adapter->req_mtu + VLAN_HLEN);
758 if (rc) {
759 release_tx_pools(adapter);
760 return rc;
761 }
762
763 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
764 IBMVNIC_TSO_BUFS,
765 IBMVNIC_TSO_BUF_SZ);
766 if (rc) {
767 release_tx_pools(adapter);
768 return rc;
769 }
770 }
771
772 return 0;
773 }
774
775 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
776 {
777 int i;
778
779 if (adapter->napi_enabled)
780 return;
781
782 for (i = 0; i < adapter->req_rx_queues; i++)
783 napi_enable(&adapter->napi[i]);
784
785 adapter->napi_enabled = true;
786 }
787
788 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
789 {
790 int i;
791
792 if (!adapter->napi_enabled)
793 return;
794
795 for (i = 0; i < adapter->req_rx_queues; i++) {
796 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
797 napi_disable(&adapter->napi[i]);
798 }
799
800 adapter->napi_enabled = false;
801 }
802
803 static int init_napi(struct ibmvnic_adapter *adapter)
804 {
805 int i;
806
807 adapter->napi = kcalloc(adapter->req_rx_queues,
808 sizeof(struct napi_struct), GFP_KERNEL);
809 if (!adapter->napi)
810 return -ENOMEM;
811
812 for (i = 0; i < adapter->req_rx_queues; i++) {
813 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
814 netif_napi_add(adapter->netdev, &adapter->napi[i],
815 ibmvnic_poll, NAPI_POLL_WEIGHT);
816 }
817
818 adapter->num_active_rx_napi = adapter->req_rx_queues;
819 return 0;
820 }
821
822 static void release_napi(struct ibmvnic_adapter *adapter)
823 {
824 int i;
825
826 if (!adapter->napi)
827 return;
828
829 for (i = 0; i < adapter->num_active_rx_napi; i++) {
830 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
831 netif_napi_del(&adapter->napi[i]);
832 }
833
834 kfree(adapter->napi);
835 adapter->napi = NULL;
836 adapter->num_active_rx_napi = 0;
837 adapter->napi_enabled = false;
838 }
839
840 static int ibmvnic_login(struct net_device *netdev)
841 {
842 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
843 unsigned long timeout = msecs_to_jiffies(30000);
844 int retry_count = 0;
845 bool retry;
846 int rc;
847
848 do {
849 retry = false;
850 if (retry_count > IBMVNIC_MAX_QUEUES) {
851 netdev_warn(netdev, "Login attempts exceeded\n");
852 return -1;
853 }
854
855 adapter->init_done_rc = 0;
856 reinit_completion(&adapter->init_done);
857 rc = send_login(adapter);
858 if (rc) {
859 netdev_warn(netdev, "Unable to login\n");
860 return rc;
861 }
862
863 if (!wait_for_completion_timeout(&adapter->init_done,
864 timeout)) {
865 netdev_warn(netdev, "Login timed out\n");
866 return -1;
867 }
868
869 if (adapter->init_done_rc == PARTIALSUCCESS) {
870 retry_count++;
871 release_sub_crqs(adapter, 1);
872
873 retry = true;
874 netdev_dbg(netdev,
875 "Received partial success, retrying...\n");
876 adapter->init_done_rc = 0;
877 reinit_completion(&adapter->init_done);
878 send_cap_queries(adapter);
879 if (!wait_for_completion_timeout(&adapter->init_done,
880 timeout)) {
881 netdev_warn(netdev,
882 "Capabilities query timed out\n");
883 return -1;
884 }
885
886 rc = init_sub_crqs(adapter);
887 if (rc) {
888 netdev_warn(netdev,
889 "SCRQ initialization failed\n");
890 return -1;
891 }
892
893 rc = init_sub_crq_irqs(adapter);
894 if (rc) {
895 netdev_warn(netdev,
896 "SCRQ irq initialization failed\n");
897 return -1;
898 }
899 } else if (adapter->init_done_rc) {
900 netdev_warn(netdev, "Adapter login failed\n");
901 return -1;
902 }
903 } while (retry);
904
905 __ibmvnic_set_mac(netdev, adapter->mac_addr);
906
907 return 0;
908 }
909
910 static void release_login_buffer(struct ibmvnic_adapter *adapter)
911 {
912 kfree(adapter->login_buf);
913 adapter->login_buf = NULL;
914 }
915
916 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
917 {
918 kfree(adapter->login_rsp_buf);
919 adapter->login_rsp_buf = NULL;
920 }
921
922 static void release_resources(struct ibmvnic_adapter *adapter)
923 {
924 release_vpd_data(adapter);
925
926 release_tx_pools(adapter);
927 release_rx_pools(adapter);
928
929 release_napi(adapter);
930 release_login_rsp_buffer(adapter);
931 }
932
933 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
934 {
935 struct net_device *netdev = adapter->netdev;
936 unsigned long timeout = msecs_to_jiffies(30000);
937 union ibmvnic_crq crq;
938 bool resend;
939 int rc;
940
941 netdev_dbg(netdev, "setting link state %d\n", link_state);
942
943 memset(&crq, 0, sizeof(crq));
944 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
945 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
946 crq.logical_link_state.link_state = link_state;
947
948 do {
949 resend = false;
950
951 reinit_completion(&adapter->init_done);
952 rc = ibmvnic_send_crq(adapter, &crq);
953 if (rc) {
954 netdev_err(netdev, "Failed to set link state\n");
955 return rc;
956 }
957
958 if (!wait_for_completion_timeout(&adapter->init_done,
959 timeout)) {
960 netdev_err(netdev, "timeout setting link state\n");
961 return -1;
962 }
963
964 if (adapter->init_done_rc == 1) {
965 /* Partuial success, delay and re-send */
966 mdelay(1000);
967 resend = true;
968 } else if (adapter->init_done_rc) {
969 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
970 adapter->init_done_rc);
971 return adapter->init_done_rc;
972 }
973 } while (resend);
974
975 return 0;
976 }
977
978 static int set_real_num_queues(struct net_device *netdev)
979 {
980 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
981 int rc;
982
983 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
984 adapter->req_tx_queues, adapter->req_rx_queues);
985
986 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
987 if (rc) {
988 netdev_err(netdev, "failed to set the number of tx queues\n");
989 return rc;
990 }
991
992 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
993 if (rc)
994 netdev_err(netdev, "failed to set the number of rx queues\n");
995
996 return rc;
997 }
998
999 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1000 {
1001 struct device *dev = &adapter->vdev->dev;
1002 union ibmvnic_crq crq;
1003 int len = 0;
1004 int rc;
1005
1006 if (adapter->vpd->buff)
1007 len = adapter->vpd->len;
1008
1009 mutex_lock(&adapter->fw_lock);
1010 adapter->fw_done_rc = 0;
1011 reinit_completion(&adapter->fw_done);
1012
1013 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1014 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1015 rc = ibmvnic_send_crq(adapter, &crq);
1016 if (rc) {
1017 mutex_unlock(&adapter->fw_lock);
1018 return rc;
1019 }
1020
1021 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1022 if (rc) {
1023 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1024 mutex_unlock(&adapter->fw_lock);
1025 return rc;
1026 }
1027 mutex_unlock(&adapter->fw_lock);
1028
1029 if (!adapter->vpd->len)
1030 return -ENODATA;
1031
1032 if (!adapter->vpd->buff)
1033 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1034 else if (adapter->vpd->len != len)
1035 adapter->vpd->buff =
1036 krealloc(adapter->vpd->buff,
1037 adapter->vpd->len, GFP_KERNEL);
1038
1039 if (!adapter->vpd->buff) {
1040 dev_err(dev, "Could allocate VPD buffer\n");
1041 return -ENOMEM;
1042 }
1043
1044 adapter->vpd->dma_addr =
1045 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1046 DMA_FROM_DEVICE);
1047 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1048 dev_err(dev, "Could not map VPD buffer\n");
1049 kfree(adapter->vpd->buff);
1050 adapter->vpd->buff = NULL;
1051 return -ENOMEM;
1052 }
1053
1054 mutex_lock(&adapter->fw_lock);
1055 adapter->fw_done_rc = 0;
1056 reinit_completion(&adapter->fw_done);
1057
1058 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1059 crq.get_vpd.cmd = GET_VPD;
1060 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1061 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1062 rc = ibmvnic_send_crq(adapter, &crq);
1063 if (rc) {
1064 kfree(adapter->vpd->buff);
1065 adapter->vpd->buff = NULL;
1066 mutex_unlock(&adapter->fw_lock);
1067 return rc;
1068 }
1069
1070 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1071 if (rc) {
1072 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1073 kfree(adapter->vpd->buff);
1074 adapter->vpd->buff = NULL;
1075 mutex_unlock(&adapter->fw_lock);
1076 return rc;
1077 }
1078
1079 mutex_unlock(&adapter->fw_lock);
1080 return 0;
1081 }
1082
1083 static int init_resources(struct ibmvnic_adapter *adapter)
1084 {
1085 struct net_device *netdev = adapter->netdev;
1086 int rc;
1087
1088 rc = set_real_num_queues(netdev);
1089 if (rc)
1090 return rc;
1091
1092 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1093 if (!adapter->vpd)
1094 return -ENOMEM;
1095
1096 /* Vital Product Data (VPD) */
1097 rc = ibmvnic_get_vpd(adapter);
1098 if (rc) {
1099 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1100 return rc;
1101 }
1102
1103 adapter->map_id = 1;
1104
1105 rc = init_napi(adapter);
1106 if (rc)
1107 return rc;
1108
1109 send_map_query(adapter);
1110
1111 rc = init_rx_pools(netdev);
1112 if (rc)
1113 return rc;
1114
1115 rc = init_tx_pools(netdev);
1116 return rc;
1117 }
1118
1119 static int __ibmvnic_open(struct net_device *netdev)
1120 {
1121 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1122 enum vnic_state prev_state = adapter->state;
1123 int i, rc;
1124
1125 adapter->state = VNIC_OPENING;
1126 replenish_pools(adapter);
1127 ibmvnic_napi_enable(adapter);
1128
1129 /* We're ready to receive frames, enable the sub-crq interrupts and
1130 * set the logical link state to up
1131 */
1132 for (i = 0; i < adapter->req_rx_queues; i++) {
1133 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1134 if (prev_state == VNIC_CLOSED)
1135 enable_irq(adapter->rx_scrq[i]->irq);
1136 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1137 }
1138
1139 for (i = 0; i < adapter->req_tx_queues; i++) {
1140 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1141 if (prev_state == VNIC_CLOSED)
1142 enable_irq(adapter->tx_scrq[i]->irq);
1143 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1144 }
1145
1146 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1147 if (rc) {
1148 for (i = 0; i < adapter->req_rx_queues; i++)
1149 napi_disable(&adapter->napi[i]);
1150 release_resources(adapter);
1151 return rc;
1152 }
1153
1154 netif_tx_start_all_queues(netdev);
1155
1156 if (prev_state == VNIC_CLOSED) {
1157 for (i = 0; i < adapter->req_rx_queues; i++)
1158 napi_schedule(&adapter->napi[i]);
1159 }
1160
1161 adapter->state = VNIC_OPEN;
1162 return rc;
1163 }
1164
1165 static int ibmvnic_open(struct net_device *netdev)
1166 {
1167 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1168 int rc;
1169
1170 /* If device failover is pending, just set device state and return.
1171 * Device operation will be handled by reset routine.
1172 */
1173 if (adapter->failover_pending) {
1174 adapter->state = VNIC_OPEN;
1175 return 0;
1176 }
1177
1178 if (adapter->state != VNIC_CLOSED) {
1179 rc = ibmvnic_login(netdev);
1180 if (rc)
1181 return rc;
1182
1183 rc = init_resources(adapter);
1184 if (rc) {
1185 netdev_err(netdev, "failed to initialize resources\n");
1186 release_resources(adapter);
1187 return rc;
1188 }
1189 }
1190
1191 rc = __ibmvnic_open(netdev);
1192
1193 return rc;
1194 }
1195
1196 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1197 {
1198 struct ibmvnic_rx_pool *rx_pool;
1199 struct ibmvnic_rx_buff *rx_buff;
1200 u64 rx_entries;
1201 int rx_scrqs;
1202 int i, j;
1203
1204 if (!adapter->rx_pool)
1205 return;
1206
1207 rx_scrqs = adapter->num_active_rx_pools;
1208 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1209
1210 /* Free any remaining skbs in the rx buffer pools */
1211 for (i = 0; i < rx_scrqs; i++) {
1212 rx_pool = &adapter->rx_pool[i];
1213 if (!rx_pool || !rx_pool->rx_buff)
1214 continue;
1215
1216 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1217 for (j = 0; j < rx_entries; j++) {
1218 rx_buff = &rx_pool->rx_buff[j];
1219 if (rx_buff && rx_buff->skb) {
1220 dev_kfree_skb_any(rx_buff->skb);
1221 rx_buff->skb = NULL;
1222 }
1223 }
1224 }
1225 }
1226
1227 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1228 struct ibmvnic_tx_pool *tx_pool)
1229 {
1230 struct ibmvnic_tx_buff *tx_buff;
1231 u64 tx_entries;
1232 int i;
1233
1234 if (!tx_pool || !tx_pool->tx_buff)
1235 return;
1236
1237 tx_entries = tx_pool->num_buffers;
1238
1239 for (i = 0; i < tx_entries; i++) {
1240 tx_buff = &tx_pool->tx_buff[i];
1241 if (tx_buff && tx_buff->skb) {
1242 dev_kfree_skb_any(tx_buff->skb);
1243 tx_buff->skb = NULL;
1244 }
1245 }
1246 }
1247
1248 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1249 {
1250 int tx_scrqs;
1251 int i;
1252
1253 if (!adapter->tx_pool || !adapter->tso_pool)
1254 return;
1255
1256 tx_scrqs = adapter->num_active_tx_pools;
1257
1258 /* Free any remaining skbs in the tx buffer pools */
1259 for (i = 0; i < tx_scrqs; i++) {
1260 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1261 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1262 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1263 }
1264 }
1265
1266 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1267 {
1268 struct net_device *netdev = adapter->netdev;
1269 int i;
1270
1271 if (adapter->tx_scrq) {
1272 for (i = 0; i < adapter->req_tx_queues; i++)
1273 if (adapter->tx_scrq[i]->irq) {
1274 netdev_dbg(netdev,
1275 "Disabling tx_scrq[%d] irq\n", i);
1276 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1277 disable_irq(adapter->tx_scrq[i]->irq);
1278 }
1279 }
1280
1281 if (adapter->rx_scrq) {
1282 for (i = 0; i < adapter->req_rx_queues; i++) {
1283 if (adapter->rx_scrq[i]->irq) {
1284 netdev_dbg(netdev,
1285 "Disabling rx_scrq[%d] irq\n", i);
1286 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1287 disable_irq(adapter->rx_scrq[i]->irq);
1288 }
1289 }
1290 }
1291 }
1292
1293 static void ibmvnic_cleanup(struct net_device *netdev)
1294 {
1295 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1296
1297 /* ensure that transmissions are stopped if called by do_reset */
1298 if (test_bit(0, &adapter->resetting))
1299 netif_tx_disable(netdev);
1300 else
1301 netif_tx_stop_all_queues(netdev);
1302
1303 ibmvnic_napi_disable(adapter);
1304 ibmvnic_disable_irqs(adapter);
1305
1306 clean_rx_pools(adapter);
1307 clean_tx_pools(adapter);
1308 }
1309
1310 static int __ibmvnic_close(struct net_device *netdev)
1311 {
1312 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1313 int rc = 0;
1314
1315 adapter->state = VNIC_CLOSING;
1316 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1317 if (rc)
1318 return rc;
1319 adapter->state = VNIC_CLOSED;
1320 return 0;
1321 }
1322
1323 static int ibmvnic_close(struct net_device *netdev)
1324 {
1325 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1326 int rc;
1327
1328 /* If device failover is pending, just set device state and return.
1329 * Device operation will be handled by reset routine.
1330 */
1331 if (adapter->failover_pending) {
1332 adapter->state = VNIC_CLOSED;
1333 return 0;
1334 }
1335
1336 rc = __ibmvnic_close(netdev);
1337 ibmvnic_cleanup(netdev);
1338
1339 return rc;
1340 }
1341
1342 /**
1343 * build_hdr_data - creates L2/L3/L4 header data buffer
1344 * @hdr_field - bitfield determining needed headers
1345 * @skb - socket buffer
1346 * @hdr_len - array of header lengths
1347 * @tot_len - total length of data
1348 *
1349 * Reads hdr_field to determine which headers are needed by firmware.
1350 * Builds a buffer containing these headers. Saves individual header
1351 * lengths and total buffer length to be used to build descriptors.
1352 */
1353 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1354 int *hdr_len, u8 *hdr_data)
1355 {
1356 int len = 0;
1357 u8 *hdr;
1358
1359 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1360 hdr_len[0] = sizeof(struct vlan_ethhdr);
1361 else
1362 hdr_len[0] = sizeof(struct ethhdr);
1363
1364 if (skb->protocol == htons(ETH_P_IP)) {
1365 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1366 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1367 hdr_len[2] = tcp_hdrlen(skb);
1368 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1369 hdr_len[2] = sizeof(struct udphdr);
1370 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1371 hdr_len[1] = sizeof(struct ipv6hdr);
1372 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1373 hdr_len[2] = tcp_hdrlen(skb);
1374 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1375 hdr_len[2] = sizeof(struct udphdr);
1376 } else if (skb->protocol == htons(ETH_P_ARP)) {
1377 hdr_len[1] = arp_hdr_len(skb->dev);
1378 hdr_len[2] = 0;
1379 }
1380
1381 memset(hdr_data, 0, 120);
1382 if ((hdr_field >> 6) & 1) {
1383 hdr = skb_mac_header(skb);
1384 memcpy(hdr_data, hdr, hdr_len[0]);
1385 len += hdr_len[0];
1386 }
1387
1388 if ((hdr_field >> 5) & 1) {
1389 hdr = skb_network_header(skb);
1390 memcpy(hdr_data + len, hdr, hdr_len[1]);
1391 len += hdr_len[1];
1392 }
1393
1394 if ((hdr_field >> 4) & 1) {
1395 hdr = skb_transport_header(skb);
1396 memcpy(hdr_data + len, hdr, hdr_len[2]);
1397 len += hdr_len[2];
1398 }
1399 return len;
1400 }
1401
1402 /**
1403 * create_hdr_descs - create header and header extension descriptors
1404 * @hdr_field - bitfield determining needed headers
1405 * @data - buffer containing header data
1406 * @len - length of data buffer
1407 * @hdr_len - array of individual header lengths
1408 * @scrq_arr - descriptor array
1409 *
1410 * Creates header and, if needed, header extension descriptors and
1411 * places them in a descriptor array, scrq_arr
1412 */
1413
1414 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1415 union sub_crq *scrq_arr)
1416 {
1417 union sub_crq hdr_desc;
1418 int tmp_len = len;
1419 int num_descs = 0;
1420 u8 *data, *cur;
1421 int tmp;
1422
1423 while (tmp_len > 0) {
1424 cur = hdr_data + len - tmp_len;
1425
1426 memset(&hdr_desc, 0, sizeof(hdr_desc));
1427 if (cur != hdr_data) {
1428 data = hdr_desc.hdr_ext.data;
1429 tmp = tmp_len > 29 ? 29 : tmp_len;
1430 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1431 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1432 hdr_desc.hdr_ext.len = tmp;
1433 } else {
1434 data = hdr_desc.hdr.data;
1435 tmp = tmp_len > 24 ? 24 : tmp_len;
1436 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1437 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1438 hdr_desc.hdr.len = tmp;
1439 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1440 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1441 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1442 hdr_desc.hdr.flag = hdr_field << 1;
1443 }
1444 memcpy(data, cur, tmp);
1445 tmp_len -= tmp;
1446 *scrq_arr = hdr_desc;
1447 scrq_arr++;
1448 num_descs++;
1449 }
1450
1451 return num_descs;
1452 }
1453
1454 /**
1455 * build_hdr_descs_arr - build a header descriptor array
1456 * @skb - socket buffer
1457 * @num_entries - number of descriptors to be sent
1458 * @subcrq - first TX descriptor
1459 * @hdr_field - bit field determining which headers will be sent
1460 *
1461 * This function will build a TX descriptor array with applicable
1462 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1463 */
1464
1465 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1466 int *num_entries, u8 hdr_field)
1467 {
1468 int hdr_len[3] = {0, 0, 0};
1469 int tot_len;
1470 u8 *hdr_data = txbuff->hdr_data;
1471
1472 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1473 txbuff->hdr_data);
1474 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1475 txbuff->indir_arr + 1);
1476 }
1477
1478 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1479 struct net_device *netdev)
1480 {
1481 /* For some backing devices, mishandling of small packets
1482 * can result in a loss of connection or TX stall. Device
1483 * architects recommend that no packet should be smaller
1484 * than the minimum MTU value provided to the driver, so
1485 * pad any packets to that length
1486 */
1487 if (skb->len < netdev->min_mtu)
1488 return skb_put_padto(skb, netdev->min_mtu);
1489
1490 return 0;
1491 }
1492
1493 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1494 {
1495 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1496 int queue_num = skb_get_queue_mapping(skb);
1497 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1498 struct device *dev = &adapter->vdev->dev;
1499 struct ibmvnic_tx_buff *tx_buff = NULL;
1500 struct ibmvnic_sub_crq_queue *tx_scrq;
1501 struct ibmvnic_tx_pool *tx_pool;
1502 unsigned int tx_send_failed = 0;
1503 unsigned int tx_map_failed = 0;
1504 unsigned int tx_dropped = 0;
1505 unsigned int tx_packets = 0;
1506 unsigned int tx_bytes = 0;
1507 dma_addr_t data_dma_addr;
1508 struct netdev_queue *txq;
1509 unsigned long lpar_rc;
1510 union sub_crq tx_crq;
1511 unsigned int offset;
1512 int num_entries = 1;
1513 unsigned char *dst;
1514 u64 *handle_array;
1515 int index = 0;
1516 u8 proto = 0;
1517 netdev_tx_t ret = NETDEV_TX_OK;
1518
1519 if (test_bit(0, &adapter->resetting)) {
1520 if (!netif_subqueue_stopped(netdev, skb))
1521 netif_stop_subqueue(netdev, queue_num);
1522 dev_kfree_skb_any(skb);
1523
1524 tx_send_failed++;
1525 tx_dropped++;
1526 ret = NETDEV_TX_OK;
1527 goto out;
1528 }
1529
1530 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1531 tx_dropped++;
1532 tx_send_failed++;
1533 ret = NETDEV_TX_OK;
1534 goto out;
1535 }
1536 if (skb_is_gso(skb))
1537 tx_pool = &adapter->tso_pool[queue_num];
1538 else
1539 tx_pool = &adapter->tx_pool[queue_num];
1540
1541 tx_scrq = adapter->tx_scrq[queue_num];
1542 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1543 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1544 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1545
1546 index = tx_pool->free_map[tx_pool->consumer_index];
1547
1548 if (index == IBMVNIC_INVALID_MAP) {
1549 dev_kfree_skb_any(skb);
1550 tx_send_failed++;
1551 tx_dropped++;
1552 ret = NETDEV_TX_OK;
1553 goto out;
1554 }
1555
1556 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1557
1558 offset = index * tx_pool->buf_size;
1559 dst = tx_pool->long_term_buff.buff + offset;
1560 memset(dst, 0, tx_pool->buf_size);
1561 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1562
1563 if (skb_shinfo(skb)->nr_frags) {
1564 int cur, i;
1565
1566 /* Copy the head */
1567 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1568 cur = skb_headlen(skb);
1569
1570 /* Copy the frags */
1571 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1572 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1573
1574 memcpy(dst + cur,
1575 page_address(skb_frag_page(frag)) +
1576 skb_frag_off(frag), skb_frag_size(frag));
1577 cur += skb_frag_size(frag);
1578 }
1579 } else {
1580 skb_copy_from_linear_data(skb, dst, skb->len);
1581 }
1582
1583 tx_pool->consumer_index =
1584 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1585
1586 tx_buff = &tx_pool->tx_buff[index];
1587 tx_buff->skb = skb;
1588 tx_buff->data_dma[0] = data_dma_addr;
1589 tx_buff->data_len[0] = skb->len;
1590 tx_buff->index = index;
1591 tx_buff->pool_index = queue_num;
1592 tx_buff->last_frag = true;
1593
1594 memset(&tx_crq, 0, sizeof(tx_crq));
1595 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1596 tx_crq.v1.type = IBMVNIC_TX_DESC;
1597 tx_crq.v1.n_crq_elem = 1;
1598 tx_crq.v1.n_sge = 1;
1599 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1600
1601 if (skb_is_gso(skb))
1602 tx_crq.v1.correlator =
1603 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1604 else
1605 tx_crq.v1.correlator = cpu_to_be32(index);
1606 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1607 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1608 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1609
1610 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1611 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1612 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1613 }
1614
1615 if (skb->protocol == htons(ETH_P_IP)) {
1616 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1617 proto = ip_hdr(skb)->protocol;
1618 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1619 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1620 proto = ipv6_hdr(skb)->nexthdr;
1621 }
1622
1623 if (proto == IPPROTO_TCP)
1624 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1625 else if (proto == IPPROTO_UDP)
1626 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1627
1628 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1629 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1630 hdrs += 2;
1631 }
1632 if (skb_is_gso(skb)) {
1633 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1634 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1635 hdrs += 2;
1636 }
1637 /* determine if l2/3/4 headers are sent to firmware */
1638 if ((*hdrs >> 7) & 1) {
1639 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1640 tx_crq.v1.n_crq_elem = num_entries;
1641 tx_buff->num_entries = num_entries;
1642 tx_buff->indir_arr[0] = tx_crq;
1643 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1644 sizeof(tx_buff->indir_arr),
1645 DMA_TO_DEVICE);
1646 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1647 dev_kfree_skb_any(skb);
1648 tx_buff->skb = NULL;
1649 if (!firmware_has_feature(FW_FEATURE_CMO))
1650 dev_err(dev, "tx: unable to map descriptor array\n");
1651 tx_map_failed++;
1652 tx_dropped++;
1653 ret = NETDEV_TX_OK;
1654 goto tx_err_out;
1655 }
1656 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1657 (u64)tx_buff->indir_dma,
1658 (u64)num_entries);
1659 dma_unmap_single(dev, tx_buff->indir_dma,
1660 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1661 } else {
1662 tx_buff->num_entries = num_entries;
1663 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1664 &tx_crq);
1665 }
1666 if (lpar_rc != H_SUCCESS) {
1667 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1668 dev_err_ratelimited(dev, "tx: send failed\n");
1669 dev_kfree_skb_any(skb);
1670 tx_buff->skb = NULL;
1671
1672 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1673 /* Disable TX and report carrier off if queue is closed
1674 * or pending failover.
1675 * Firmware guarantees that a signal will be sent to the
1676 * driver, triggering a reset or some other action.
1677 */
1678 netif_tx_stop_all_queues(netdev);
1679 netif_carrier_off(netdev);
1680 }
1681
1682 tx_send_failed++;
1683 tx_dropped++;
1684 ret = NETDEV_TX_OK;
1685 goto tx_err_out;
1686 }
1687
1688 if (atomic_add_return(num_entries, &tx_scrq->used)
1689 >= adapter->req_tx_entries_per_subcrq) {
1690 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1691 netif_stop_subqueue(netdev, queue_num);
1692 }
1693
1694 tx_packets++;
1695 tx_bytes += skb->len;
1696 txq->trans_start = jiffies;
1697 ret = NETDEV_TX_OK;
1698 goto out;
1699
1700 tx_err_out:
1701 /* roll back consumer index and map array*/
1702 if (tx_pool->consumer_index == 0)
1703 tx_pool->consumer_index =
1704 tx_pool->num_buffers - 1;
1705 else
1706 tx_pool->consumer_index--;
1707 tx_pool->free_map[tx_pool->consumer_index] = index;
1708 out:
1709 netdev->stats.tx_dropped += tx_dropped;
1710 netdev->stats.tx_bytes += tx_bytes;
1711 netdev->stats.tx_packets += tx_packets;
1712 adapter->tx_send_failed += tx_send_failed;
1713 adapter->tx_map_failed += tx_map_failed;
1714 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1715 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1716 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1717
1718 return ret;
1719 }
1720
1721 static void ibmvnic_set_multi(struct net_device *netdev)
1722 {
1723 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1724 struct netdev_hw_addr *ha;
1725 union ibmvnic_crq crq;
1726
1727 memset(&crq, 0, sizeof(crq));
1728 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1729 crq.request_capability.cmd = REQUEST_CAPABILITY;
1730
1731 if (netdev->flags & IFF_PROMISC) {
1732 if (!adapter->promisc_supported)
1733 return;
1734 } else {
1735 if (netdev->flags & IFF_ALLMULTI) {
1736 /* Accept all multicast */
1737 memset(&crq, 0, sizeof(crq));
1738 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1739 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1740 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1741 ibmvnic_send_crq(adapter, &crq);
1742 } else if (netdev_mc_empty(netdev)) {
1743 /* Reject all multicast */
1744 memset(&crq, 0, sizeof(crq));
1745 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1746 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1747 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1748 ibmvnic_send_crq(adapter, &crq);
1749 } else {
1750 /* Accept one or more multicast(s) */
1751 netdev_for_each_mc_addr(ha, netdev) {
1752 memset(&crq, 0, sizeof(crq));
1753 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1754 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1755 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1756 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1757 ha->addr);
1758 ibmvnic_send_crq(adapter, &crq);
1759 }
1760 }
1761 }
1762 }
1763
1764 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1765 {
1766 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1767 union ibmvnic_crq crq;
1768 int rc;
1769
1770 if (!is_valid_ether_addr(dev_addr)) {
1771 rc = -EADDRNOTAVAIL;
1772 goto err;
1773 }
1774
1775 memset(&crq, 0, sizeof(crq));
1776 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1777 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1778 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1779
1780 mutex_lock(&adapter->fw_lock);
1781 adapter->fw_done_rc = 0;
1782 reinit_completion(&adapter->fw_done);
1783
1784 rc = ibmvnic_send_crq(adapter, &crq);
1785 if (rc) {
1786 rc = -EIO;
1787 mutex_unlock(&adapter->fw_lock);
1788 goto err;
1789 }
1790
1791 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1792 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1793 if (rc || adapter->fw_done_rc) {
1794 rc = -EIO;
1795 mutex_unlock(&adapter->fw_lock);
1796 goto err;
1797 }
1798 mutex_unlock(&adapter->fw_lock);
1799 return 0;
1800 err:
1801 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1802 return rc;
1803 }
1804
1805 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1806 {
1807 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1808 struct sockaddr *addr = p;
1809 int rc;
1810
1811 rc = 0;
1812 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1813 if (adapter->state != VNIC_PROBED)
1814 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1815
1816 return rc;
1817 }
1818
1819 /**
1820 * do_change_param_reset returns zero if we are able to keep processing reset
1821 * events, or non-zero if we hit a fatal error and must halt.
1822 */
1823 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1824 struct ibmvnic_rwi *rwi,
1825 u32 reset_state)
1826 {
1827 struct net_device *netdev = adapter->netdev;
1828 int i, rc;
1829
1830 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1831 rwi->reset_reason);
1832
1833 netif_carrier_off(netdev);
1834 adapter->reset_reason = rwi->reset_reason;
1835
1836 ibmvnic_cleanup(netdev);
1837
1838 if (reset_state == VNIC_OPEN) {
1839 rc = __ibmvnic_close(netdev);
1840 if (rc)
1841 return rc;
1842 }
1843
1844 release_resources(adapter);
1845 release_sub_crqs(adapter, 1);
1846 release_crq_queue(adapter);
1847
1848 adapter->state = VNIC_PROBED;
1849
1850 rc = init_crq_queue(adapter);
1851
1852 if (rc) {
1853 netdev_err(adapter->netdev,
1854 "Couldn't initialize crq. rc=%d\n", rc);
1855 return rc;
1856 }
1857
1858 rc = ibmvnic_reset_init(adapter);
1859 if (rc)
1860 return IBMVNIC_INIT_FAILED;
1861
1862 /* If the adapter was in PROBE state prior to the reset,
1863 * exit here.
1864 */
1865 if (reset_state == VNIC_PROBED)
1866 return 0;
1867
1868 rc = ibmvnic_login(netdev);
1869 if (rc) {
1870 adapter->state = reset_state;
1871 return rc;
1872 }
1873
1874 rc = init_resources(adapter);
1875 if (rc)
1876 return rc;
1877
1878 ibmvnic_disable_irqs(adapter);
1879
1880 adapter->state = VNIC_CLOSED;
1881
1882 if (reset_state == VNIC_CLOSED)
1883 return 0;
1884
1885 rc = __ibmvnic_open(netdev);
1886 if (rc)
1887 return IBMVNIC_OPEN_FAILED;
1888
1889 /* refresh device's multicast list */
1890 ibmvnic_set_multi(netdev);
1891
1892 /* kick napi */
1893 for (i = 0; i < adapter->req_rx_queues; i++)
1894 napi_schedule(&adapter->napi[i]);
1895
1896 return 0;
1897 }
1898
1899 /**
1900 * do_reset returns zero if we are able to keep processing reset events, or
1901 * non-zero if we hit a fatal error and must halt.
1902 */
1903 static int do_reset(struct ibmvnic_adapter *adapter,
1904 struct ibmvnic_rwi *rwi, u32 reset_state)
1905 {
1906 u64 old_num_rx_queues, old_num_tx_queues;
1907 u64 old_num_rx_slots, old_num_tx_slots;
1908 struct net_device *netdev = adapter->netdev;
1909 int i, rc;
1910
1911 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1912 rwi->reset_reason);
1913
1914 rtnl_lock();
1915
1916 netif_carrier_off(netdev);
1917 adapter->reset_reason = rwi->reset_reason;
1918
1919 old_num_rx_queues = adapter->req_rx_queues;
1920 old_num_tx_queues = adapter->req_tx_queues;
1921 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1922 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1923
1924 ibmvnic_cleanup(netdev);
1925
1926 if (reset_state == VNIC_OPEN &&
1927 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1928 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1929 adapter->state = VNIC_CLOSING;
1930
1931 /* Release the RTNL lock before link state change and
1932 * re-acquire after the link state change to allow
1933 * linkwatch_event to grab the RTNL lock and run during
1934 * a reset.
1935 */
1936 rtnl_unlock();
1937 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1938 rtnl_lock();
1939 if (rc)
1940 goto out;
1941
1942 if (adapter->state != VNIC_CLOSING) {
1943 rc = -1;
1944 goto out;
1945 }
1946
1947 adapter->state = VNIC_CLOSED;
1948 }
1949
1950 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1951 /* remove the closed state so when we call open it appears
1952 * we are coming from the probed state.
1953 */
1954 adapter->state = VNIC_PROBED;
1955
1956 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1957 rc = ibmvnic_reenable_crq_queue(adapter);
1958 release_sub_crqs(adapter, 1);
1959 } else {
1960 rc = ibmvnic_reset_crq(adapter);
1961 if (!rc)
1962 rc = vio_enable_interrupts(adapter->vdev);
1963 }
1964
1965 if (rc) {
1966 netdev_err(adapter->netdev,
1967 "Couldn't initialize crq. rc=%d\n", rc);
1968 goto out;
1969 }
1970
1971 rc = ibmvnic_reset_init(adapter);
1972 if (rc) {
1973 rc = IBMVNIC_INIT_FAILED;
1974 goto out;
1975 }
1976
1977 /* If the adapter was in PROBE state prior to the reset,
1978 * exit here.
1979 */
1980 if (reset_state == VNIC_PROBED) {
1981 rc = 0;
1982 goto out;
1983 }
1984
1985 rc = ibmvnic_login(netdev);
1986 if (rc) {
1987 adapter->state = reset_state;
1988 goto out;
1989 }
1990
1991 if (adapter->req_rx_queues != old_num_rx_queues ||
1992 adapter->req_tx_queues != old_num_tx_queues ||
1993 adapter->req_rx_add_entries_per_subcrq !=
1994 old_num_rx_slots ||
1995 adapter->req_tx_entries_per_subcrq !=
1996 old_num_tx_slots) {
1997 release_rx_pools(adapter);
1998 release_tx_pools(adapter);
1999 release_napi(adapter);
2000 release_vpd_data(adapter);
2001
2002 rc = init_resources(adapter);
2003 if (rc)
2004 goto out;
2005
2006 } else {
2007 rc = reset_tx_pools(adapter);
2008 if (rc)
2009 goto out;
2010
2011 rc = reset_rx_pools(adapter);
2012 if (rc)
2013 goto out;
2014 }
2015 ibmvnic_disable_irqs(adapter);
2016 }
2017 adapter->state = VNIC_CLOSED;
2018
2019 if (reset_state == VNIC_CLOSED) {
2020 rc = 0;
2021 goto out;
2022 }
2023
2024 rc = __ibmvnic_open(netdev);
2025 if (rc) {
2026 rc = IBMVNIC_OPEN_FAILED;
2027 goto out;
2028 }
2029
2030 /* refresh device's multicast list */
2031 ibmvnic_set_multi(netdev);
2032
2033 /* kick napi */
2034 for (i = 0; i < adapter->req_rx_queues; i++)
2035 napi_schedule(&adapter->napi[i]);
2036
2037 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
2038 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2039
2040 rc = 0;
2041
2042 out:
2043 rtnl_unlock();
2044
2045 return rc;
2046 }
2047
2048 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2049 struct ibmvnic_rwi *rwi, u32 reset_state)
2050 {
2051 struct net_device *netdev = adapter->netdev;
2052 int rc;
2053
2054 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2055 rwi->reset_reason);
2056
2057 netif_carrier_off(netdev);
2058 adapter->reset_reason = rwi->reset_reason;
2059
2060 ibmvnic_cleanup(netdev);
2061 release_resources(adapter);
2062 release_sub_crqs(adapter, 0);
2063 release_crq_queue(adapter);
2064
2065 /* remove the closed state so when we call open it appears
2066 * we are coming from the probed state.
2067 */
2068 adapter->state = VNIC_PROBED;
2069
2070 reinit_completion(&adapter->init_done);
2071 rc = init_crq_queue(adapter);
2072 if (rc) {
2073 netdev_err(adapter->netdev,
2074 "Couldn't initialize crq. rc=%d\n", rc);
2075 return rc;
2076 }
2077
2078 rc = ibmvnic_init(adapter);
2079 if (rc)
2080 return rc;
2081
2082 /* If the adapter was in PROBE state prior to the reset,
2083 * exit here.
2084 */
2085 if (reset_state == VNIC_PROBED)
2086 return 0;
2087
2088 rc = ibmvnic_login(netdev);
2089 if (rc) {
2090 adapter->state = VNIC_PROBED;
2091 return 0;
2092 }
2093
2094 rc = init_resources(adapter);
2095 if (rc)
2096 return rc;
2097
2098 ibmvnic_disable_irqs(adapter);
2099 adapter->state = VNIC_CLOSED;
2100
2101 if (reset_state == VNIC_CLOSED)
2102 return 0;
2103
2104 rc = __ibmvnic_open(netdev);
2105 if (rc)
2106 return IBMVNIC_OPEN_FAILED;
2107
2108 return 0;
2109 }
2110
2111 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2112 {
2113 struct ibmvnic_rwi *rwi;
2114 unsigned long flags;
2115
2116 spin_lock_irqsave(&adapter->rwi_lock, flags);
2117
2118 if (!list_empty(&adapter->rwi_list)) {
2119 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2120 list);
2121 list_del(&rwi->list);
2122 } else {
2123 rwi = NULL;
2124 }
2125
2126 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2127 return rwi;
2128 }
2129
2130 static void free_all_rwi(struct ibmvnic_adapter *adapter)
2131 {
2132 struct ibmvnic_rwi *rwi;
2133
2134 rwi = get_next_rwi(adapter);
2135 while (rwi) {
2136 kfree(rwi);
2137 rwi = get_next_rwi(adapter);
2138 }
2139 }
2140
2141 static void __ibmvnic_reset(struct work_struct *work)
2142 {
2143 struct ibmvnic_rwi *rwi;
2144 struct ibmvnic_adapter *adapter;
2145 bool saved_state = false;
2146 unsigned long flags;
2147 u32 reset_state;
2148 int rc = 0;
2149
2150 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2151
2152 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2153 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2154 IBMVNIC_RESET_DELAY);
2155 return;
2156 }
2157
2158 rwi = get_next_rwi(adapter);
2159 while (rwi) {
2160 spin_lock_irqsave(&adapter->state_lock, flags);
2161
2162 if (adapter->state == VNIC_REMOVING ||
2163 adapter->state == VNIC_REMOVED) {
2164 spin_unlock_irqrestore(&adapter->state_lock, flags);
2165 kfree(rwi);
2166 rc = EBUSY;
2167 break;
2168 }
2169
2170 if (!saved_state) {
2171 reset_state = adapter->state;
2172 adapter->state = VNIC_RESETTING;
2173 saved_state = true;
2174 }
2175 spin_unlock_irqrestore(&adapter->state_lock, flags);
2176
2177 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2178 /* CHANGE_PARAM requestor holds rtnl_lock */
2179 rc = do_change_param_reset(adapter, rwi, reset_state);
2180 } else if (adapter->force_reset_recovery) {
2181 /* Transport event occurred during previous reset */
2182 if (adapter->wait_for_reset) {
2183 /* Previous was CHANGE_PARAM; caller locked */
2184 adapter->force_reset_recovery = false;
2185 rc = do_hard_reset(adapter, rwi, reset_state);
2186 } else {
2187 rtnl_lock();
2188 adapter->force_reset_recovery = false;
2189 rc = do_hard_reset(adapter, rwi, reset_state);
2190 rtnl_unlock();
2191 }
2192 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
2193 adapter->from_passive_init)) {
2194 rc = do_reset(adapter, rwi, reset_state);
2195 }
2196 kfree(rwi);
2197 if (rc == IBMVNIC_OPEN_FAILED) {
2198 if (list_empty(&adapter->rwi_list))
2199 adapter->state = VNIC_CLOSED;
2200 else
2201 adapter->state = reset_state;
2202 rc = 0;
2203 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2204 !adapter->force_reset_recovery)
2205 break;
2206
2207 rwi = get_next_rwi(adapter);
2208
2209 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2210 rwi->reset_reason == VNIC_RESET_MOBILITY))
2211 adapter->force_reset_recovery = true;
2212 }
2213
2214 if (adapter->wait_for_reset) {
2215 adapter->reset_done_rc = rc;
2216 complete(&adapter->reset_done);
2217 }
2218
2219 if (rc) {
2220 netdev_dbg(adapter->netdev, "Reset failed\n");
2221 free_all_rwi(adapter);
2222 }
2223
2224 clear_bit_unlock(0, &adapter->resetting);
2225 }
2226
2227 static void __ibmvnic_delayed_reset(struct work_struct *work)
2228 {
2229 struct ibmvnic_adapter *adapter;
2230
2231 adapter = container_of(work, struct ibmvnic_adapter,
2232 ibmvnic_delayed_reset.work);
2233 __ibmvnic_reset(&adapter->ibmvnic_reset);
2234 }
2235
2236 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2237 enum ibmvnic_reset_reason reason)
2238 {
2239 struct list_head *entry, *tmp_entry;
2240 struct ibmvnic_rwi *rwi, *tmp;
2241 struct net_device *netdev = adapter->netdev;
2242 unsigned long flags;
2243 int ret;
2244
2245 if (adapter->state == VNIC_REMOVING ||
2246 adapter->state == VNIC_REMOVED ||
2247 adapter->failover_pending) {
2248 ret = EBUSY;
2249 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2250 goto err;
2251 }
2252
2253 if (adapter->state == VNIC_PROBING) {
2254 netdev_warn(netdev, "Adapter reset during probe\n");
2255 ret = adapter->init_done_rc = EAGAIN;
2256 goto err;
2257 }
2258
2259 spin_lock_irqsave(&adapter->rwi_lock, flags);
2260
2261 list_for_each(entry, &adapter->rwi_list) {
2262 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2263 if (tmp->reset_reason == reason) {
2264 netdev_dbg(netdev, "Skipping matching reset\n");
2265 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2266 ret = EBUSY;
2267 goto err;
2268 }
2269 }
2270
2271 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2272 if (!rwi) {
2273 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2274 ibmvnic_close(netdev);
2275 ret = ENOMEM;
2276 goto err;
2277 }
2278 /* if we just received a transport event,
2279 * flush reset queue and process this reset
2280 */
2281 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2282 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2283 list_del(entry);
2284 }
2285 rwi->reset_reason = reason;
2286 list_add_tail(&rwi->list, &adapter->rwi_list);
2287 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2288 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2289 schedule_work(&adapter->ibmvnic_reset);
2290
2291 return 0;
2292 err:
2293 return -ret;
2294 }
2295
2296 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2297 {
2298 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2299
2300 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2301 }
2302
2303 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2304 struct ibmvnic_rx_buff *rx_buff)
2305 {
2306 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2307
2308 rx_buff->skb = NULL;
2309
2310 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2311 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2312
2313 atomic_dec(&pool->available);
2314 }
2315
2316 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2317 {
2318 struct net_device *netdev = napi->dev;
2319 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2320 int scrq_num = (int)(napi - adapter->napi);
2321 int frames_processed = 0;
2322
2323 restart_poll:
2324 while (frames_processed < budget) {
2325 struct sk_buff *skb;
2326 struct ibmvnic_rx_buff *rx_buff;
2327 union sub_crq *next;
2328 u32 length;
2329 u16 offset;
2330 u8 flags = 0;
2331
2332 if (unlikely(test_bit(0, &adapter->resetting) &&
2333 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2334 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2335 napi_complete_done(napi, frames_processed);
2336 return frames_processed;
2337 }
2338
2339 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2340 break;
2341 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2342 rx_buff =
2343 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2344 rx_comp.correlator);
2345 /* do error checking */
2346 if (next->rx_comp.rc) {
2347 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2348 be16_to_cpu(next->rx_comp.rc));
2349 /* free the entry */
2350 next->rx_comp.first = 0;
2351 dev_kfree_skb_any(rx_buff->skb);
2352 remove_buff_from_pool(adapter, rx_buff);
2353 continue;
2354 } else if (!rx_buff->skb) {
2355 /* free the entry */
2356 next->rx_comp.first = 0;
2357 remove_buff_from_pool(adapter, rx_buff);
2358 continue;
2359 }
2360
2361 length = be32_to_cpu(next->rx_comp.len);
2362 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2363 flags = next->rx_comp.flags;
2364 skb = rx_buff->skb;
2365 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2366 length);
2367
2368 /* VLAN Header has been stripped by the system firmware and
2369 * needs to be inserted by the driver
2370 */
2371 if (adapter->rx_vlan_header_insertion &&
2372 (flags & IBMVNIC_VLAN_STRIPPED))
2373 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2374 ntohs(next->rx_comp.vlan_tci));
2375
2376 /* free the entry */
2377 next->rx_comp.first = 0;
2378 remove_buff_from_pool(adapter, rx_buff);
2379
2380 skb_put(skb, length);
2381 skb->protocol = eth_type_trans(skb, netdev);
2382 skb_record_rx_queue(skb, scrq_num);
2383
2384 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2385 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2386 skb->ip_summed = CHECKSUM_UNNECESSARY;
2387 }
2388
2389 length = skb->len;
2390 napi_gro_receive(napi, skb); /* send it up */
2391 netdev->stats.rx_packets++;
2392 netdev->stats.rx_bytes += length;
2393 adapter->rx_stats_buffers[scrq_num].packets++;
2394 adapter->rx_stats_buffers[scrq_num].bytes += length;
2395 frames_processed++;
2396 }
2397
2398 if (adapter->state != VNIC_CLOSING)
2399 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2400
2401 if (frames_processed < budget) {
2402 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2403 napi_complete_done(napi, frames_processed);
2404 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2405 napi_reschedule(napi)) {
2406 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2407 goto restart_poll;
2408 }
2409 }
2410 return frames_processed;
2411 }
2412
2413 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2414 {
2415 int rc, ret;
2416
2417 adapter->fallback.mtu = adapter->req_mtu;
2418 adapter->fallback.rx_queues = adapter->req_rx_queues;
2419 adapter->fallback.tx_queues = adapter->req_tx_queues;
2420 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2421 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2422
2423 reinit_completion(&adapter->reset_done);
2424 adapter->wait_for_reset = true;
2425 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2426
2427 if (rc) {
2428 ret = rc;
2429 goto out;
2430 }
2431 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2432 if (rc) {
2433 ret = -ENODEV;
2434 goto out;
2435 }
2436
2437 ret = 0;
2438 if (adapter->reset_done_rc) {
2439 ret = -EIO;
2440 adapter->desired.mtu = adapter->fallback.mtu;
2441 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2442 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2443 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2444 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2445
2446 reinit_completion(&adapter->reset_done);
2447 adapter->wait_for_reset = true;
2448 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2449 if (rc) {
2450 ret = rc;
2451 goto out;
2452 }
2453 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2454 60000);
2455 if (rc) {
2456 ret = -ENODEV;
2457 goto out;
2458 }
2459 }
2460 out:
2461 adapter->wait_for_reset = false;
2462
2463 return ret;
2464 }
2465
2466 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2467 {
2468 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2469
2470 adapter->desired.mtu = new_mtu + ETH_HLEN;
2471
2472 return wait_for_reset(adapter);
2473 }
2474
2475 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2476 struct net_device *dev,
2477 netdev_features_t features)
2478 {
2479 /* Some backing hardware adapters can not
2480 * handle packets with a MSS less than 224
2481 * or with only one segment.
2482 */
2483 if (skb_is_gso(skb)) {
2484 if (skb_shinfo(skb)->gso_size < 224 ||
2485 skb_shinfo(skb)->gso_segs == 1)
2486 features &= ~NETIF_F_GSO_MASK;
2487 }
2488
2489 return features;
2490 }
2491
2492 static const struct net_device_ops ibmvnic_netdev_ops = {
2493 .ndo_open = ibmvnic_open,
2494 .ndo_stop = ibmvnic_close,
2495 .ndo_start_xmit = ibmvnic_xmit,
2496 .ndo_set_rx_mode = ibmvnic_set_multi,
2497 .ndo_set_mac_address = ibmvnic_set_mac,
2498 .ndo_validate_addr = eth_validate_addr,
2499 .ndo_tx_timeout = ibmvnic_tx_timeout,
2500 .ndo_change_mtu = ibmvnic_change_mtu,
2501 .ndo_features_check = ibmvnic_features_check,
2502 };
2503
2504 /* ethtool functions */
2505
2506 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2507 struct ethtool_link_ksettings *cmd)
2508 {
2509 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2510 int rc;
2511
2512 rc = send_query_phys_parms(adapter);
2513 if (rc) {
2514 adapter->speed = SPEED_UNKNOWN;
2515 adapter->duplex = DUPLEX_UNKNOWN;
2516 }
2517 cmd->base.speed = adapter->speed;
2518 cmd->base.duplex = adapter->duplex;
2519 cmd->base.port = PORT_FIBRE;
2520 cmd->base.phy_address = 0;
2521 cmd->base.autoneg = AUTONEG_ENABLE;
2522
2523 return 0;
2524 }
2525
2526 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2527 struct ethtool_drvinfo *info)
2528 {
2529 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2530
2531 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2532 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2533 strlcpy(info->fw_version, adapter->fw_version,
2534 sizeof(info->fw_version));
2535 }
2536
2537 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2538 {
2539 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2540
2541 return adapter->msg_enable;
2542 }
2543
2544 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2545 {
2546 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2547
2548 adapter->msg_enable = data;
2549 }
2550
2551 static u32 ibmvnic_get_link(struct net_device *netdev)
2552 {
2553 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2554
2555 /* Don't need to send a query because we request a logical link up at
2556 * init and then we wait for link state indications
2557 */
2558 return adapter->logical_link_state;
2559 }
2560
2561 static void ibmvnic_get_ringparam(struct net_device *netdev,
2562 struct ethtool_ringparam *ring)
2563 {
2564 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2565
2566 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2567 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2568 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2569 } else {
2570 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2571 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2572 }
2573 ring->rx_mini_max_pending = 0;
2574 ring->rx_jumbo_max_pending = 0;
2575 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2576 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2577 ring->rx_mini_pending = 0;
2578 ring->rx_jumbo_pending = 0;
2579 }
2580
2581 static int ibmvnic_set_ringparam(struct net_device *netdev,
2582 struct ethtool_ringparam *ring)
2583 {
2584 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2585 int ret;
2586
2587 ret = 0;
2588 adapter->desired.rx_entries = ring->rx_pending;
2589 adapter->desired.tx_entries = ring->tx_pending;
2590
2591 ret = wait_for_reset(adapter);
2592
2593 if (!ret &&
2594 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2595 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2596 netdev_info(netdev,
2597 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2598 ring->rx_pending, ring->tx_pending,
2599 adapter->req_rx_add_entries_per_subcrq,
2600 adapter->req_tx_entries_per_subcrq);
2601 return ret;
2602 }
2603
2604 static void ibmvnic_get_channels(struct net_device *netdev,
2605 struct ethtool_channels *channels)
2606 {
2607 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2608
2609 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2610 channels->max_rx = adapter->max_rx_queues;
2611 channels->max_tx = adapter->max_tx_queues;
2612 } else {
2613 channels->max_rx = IBMVNIC_MAX_QUEUES;
2614 channels->max_tx = IBMVNIC_MAX_QUEUES;
2615 }
2616
2617 channels->max_other = 0;
2618 channels->max_combined = 0;
2619 channels->rx_count = adapter->req_rx_queues;
2620 channels->tx_count = adapter->req_tx_queues;
2621 channels->other_count = 0;
2622 channels->combined_count = 0;
2623 }
2624
2625 static int ibmvnic_set_channels(struct net_device *netdev,
2626 struct ethtool_channels *channels)
2627 {
2628 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2629 int ret;
2630
2631 ret = 0;
2632 adapter->desired.rx_queues = channels->rx_count;
2633 adapter->desired.tx_queues = channels->tx_count;
2634
2635 ret = wait_for_reset(adapter);
2636
2637 if (!ret &&
2638 (adapter->req_rx_queues != channels->rx_count ||
2639 adapter->req_tx_queues != channels->tx_count))
2640 netdev_info(netdev,
2641 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2642 channels->rx_count, channels->tx_count,
2643 adapter->req_rx_queues, adapter->req_tx_queues);
2644 return ret;
2645
2646 }
2647
2648 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2649 {
2650 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2651 int i;
2652
2653 switch (stringset) {
2654 case ETH_SS_STATS:
2655 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2656 i++, data += ETH_GSTRING_LEN)
2657 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2658
2659 for (i = 0; i < adapter->req_tx_queues; i++) {
2660 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2661 data += ETH_GSTRING_LEN;
2662
2663 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2664 data += ETH_GSTRING_LEN;
2665
2666 snprintf(data, ETH_GSTRING_LEN,
2667 "tx%d_dropped_packets", i);
2668 data += ETH_GSTRING_LEN;
2669 }
2670
2671 for (i = 0; i < adapter->req_rx_queues; i++) {
2672 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2673 data += ETH_GSTRING_LEN;
2674
2675 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2676 data += ETH_GSTRING_LEN;
2677
2678 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2679 data += ETH_GSTRING_LEN;
2680 }
2681 break;
2682
2683 case ETH_SS_PRIV_FLAGS:
2684 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2685 strcpy(data + i * ETH_GSTRING_LEN,
2686 ibmvnic_priv_flags[i]);
2687 break;
2688 default:
2689 return;
2690 }
2691 }
2692
2693 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2694 {
2695 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2696
2697 switch (sset) {
2698 case ETH_SS_STATS:
2699 return ARRAY_SIZE(ibmvnic_stats) +
2700 adapter->req_tx_queues * NUM_TX_STATS +
2701 adapter->req_rx_queues * NUM_RX_STATS;
2702 case ETH_SS_PRIV_FLAGS:
2703 return ARRAY_SIZE(ibmvnic_priv_flags);
2704 default:
2705 return -EOPNOTSUPP;
2706 }
2707 }
2708
2709 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2710 struct ethtool_stats *stats, u64 *data)
2711 {
2712 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2713 union ibmvnic_crq crq;
2714 int i, j;
2715 int rc;
2716
2717 memset(&crq, 0, sizeof(crq));
2718 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2719 crq.request_statistics.cmd = REQUEST_STATISTICS;
2720 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2721 crq.request_statistics.len =
2722 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2723
2724 /* Wait for data to be written */
2725 reinit_completion(&adapter->stats_done);
2726 rc = ibmvnic_send_crq(adapter, &crq);
2727 if (rc)
2728 return;
2729 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2730 if (rc)
2731 return;
2732
2733 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2734 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2735 ibmvnic_stats[i].offset));
2736
2737 for (j = 0; j < adapter->req_tx_queues; j++) {
2738 data[i] = adapter->tx_stats_buffers[j].packets;
2739 i++;
2740 data[i] = adapter->tx_stats_buffers[j].bytes;
2741 i++;
2742 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2743 i++;
2744 }
2745
2746 for (j = 0; j < adapter->req_rx_queues; j++) {
2747 data[i] = adapter->rx_stats_buffers[j].packets;
2748 i++;
2749 data[i] = adapter->rx_stats_buffers[j].bytes;
2750 i++;
2751 data[i] = adapter->rx_stats_buffers[j].interrupts;
2752 i++;
2753 }
2754 }
2755
2756 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2757 {
2758 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2759
2760 return adapter->priv_flags;
2761 }
2762
2763 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2764 {
2765 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2766 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2767
2768 if (which_maxes)
2769 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2770 else
2771 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2772
2773 return 0;
2774 }
2775 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2776 .get_drvinfo = ibmvnic_get_drvinfo,
2777 .get_msglevel = ibmvnic_get_msglevel,
2778 .set_msglevel = ibmvnic_set_msglevel,
2779 .get_link = ibmvnic_get_link,
2780 .get_ringparam = ibmvnic_get_ringparam,
2781 .set_ringparam = ibmvnic_set_ringparam,
2782 .get_channels = ibmvnic_get_channels,
2783 .set_channels = ibmvnic_set_channels,
2784 .get_strings = ibmvnic_get_strings,
2785 .get_sset_count = ibmvnic_get_sset_count,
2786 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2787 .get_link_ksettings = ibmvnic_get_link_ksettings,
2788 .get_priv_flags = ibmvnic_get_priv_flags,
2789 .set_priv_flags = ibmvnic_set_priv_flags,
2790 };
2791
2792 /* Routines for managing CRQs/sCRQs */
2793
2794 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2795 struct ibmvnic_sub_crq_queue *scrq)
2796 {
2797 int rc;
2798
2799 if (scrq->irq) {
2800 free_irq(scrq->irq, scrq);
2801 irq_dispose_mapping(scrq->irq);
2802 scrq->irq = 0;
2803 }
2804
2805 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2806 atomic_set(&scrq->used, 0);
2807 scrq->cur = 0;
2808
2809 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2810 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2811 return rc;
2812 }
2813
2814 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2815 {
2816 int i, rc;
2817
2818 for (i = 0; i < adapter->req_tx_queues; i++) {
2819 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2820 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2821 if (rc)
2822 return rc;
2823 }
2824
2825 for (i = 0; i < adapter->req_rx_queues; i++) {
2826 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2827 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2828 if (rc)
2829 return rc;
2830 }
2831
2832 return rc;
2833 }
2834
2835 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2836 struct ibmvnic_sub_crq_queue *scrq,
2837 bool do_h_free)
2838 {
2839 struct device *dev = &adapter->vdev->dev;
2840 long rc;
2841
2842 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2843
2844 if (do_h_free) {
2845 /* Close the sub-crqs */
2846 do {
2847 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2848 adapter->vdev->unit_address,
2849 scrq->crq_num);
2850 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2851
2852 if (rc) {
2853 netdev_err(adapter->netdev,
2854 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2855 scrq->crq_num, rc);
2856 }
2857 }
2858
2859 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2860 DMA_BIDIRECTIONAL);
2861 free_pages((unsigned long)scrq->msgs, 2);
2862 kfree(scrq);
2863 }
2864
2865 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2866 *adapter)
2867 {
2868 struct device *dev = &adapter->vdev->dev;
2869 struct ibmvnic_sub_crq_queue *scrq;
2870 int rc;
2871
2872 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2873 if (!scrq)
2874 return NULL;
2875
2876 scrq->msgs =
2877 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2878 if (!scrq->msgs) {
2879 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2880 goto zero_page_failed;
2881 }
2882
2883 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2884 DMA_BIDIRECTIONAL);
2885 if (dma_mapping_error(dev, scrq->msg_token)) {
2886 dev_warn(dev, "Couldn't map crq queue messages page\n");
2887 goto map_failed;
2888 }
2889
2890 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2891 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2892
2893 if (rc == H_RESOURCE)
2894 rc = ibmvnic_reset_crq(adapter);
2895
2896 if (rc == H_CLOSED) {
2897 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2898 } else if (rc) {
2899 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2900 goto reg_failed;
2901 }
2902
2903 scrq->adapter = adapter;
2904 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2905 spin_lock_init(&scrq->lock);
2906
2907 netdev_dbg(adapter->netdev,
2908 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2909 scrq->crq_num, scrq->hw_irq, scrq->irq);
2910
2911 return scrq;
2912
2913 reg_failed:
2914 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2915 DMA_BIDIRECTIONAL);
2916 map_failed:
2917 free_pages((unsigned long)scrq->msgs, 2);
2918 zero_page_failed:
2919 kfree(scrq);
2920
2921 return NULL;
2922 }
2923
2924 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2925 {
2926 int i;
2927
2928 if (adapter->tx_scrq) {
2929 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2930 if (!adapter->tx_scrq[i])
2931 continue;
2932
2933 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2934 i);
2935 if (adapter->tx_scrq[i]->irq) {
2936 free_irq(adapter->tx_scrq[i]->irq,
2937 adapter->tx_scrq[i]);
2938 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2939 adapter->tx_scrq[i]->irq = 0;
2940 }
2941
2942 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2943 do_h_free);
2944 }
2945
2946 kfree(adapter->tx_scrq);
2947 adapter->tx_scrq = NULL;
2948 adapter->num_active_tx_scrqs = 0;
2949 }
2950
2951 if (adapter->rx_scrq) {
2952 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2953 if (!adapter->rx_scrq[i])
2954 continue;
2955
2956 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2957 i);
2958 if (adapter->rx_scrq[i]->irq) {
2959 free_irq(adapter->rx_scrq[i]->irq,
2960 adapter->rx_scrq[i]);
2961 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2962 adapter->rx_scrq[i]->irq = 0;
2963 }
2964
2965 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2966 do_h_free);
2967 }
2968
2969 kfree(adapter->rx_scrq);
2970 adapter->rx_scrq = NULL;
2971 adapter->num_active_rx_scrqs = 0;
2972 }
2973 }
2974
2975 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2976 struct ibmvnic_sub_crq_queue *scrq)
2977 {
2978 struct device *dev = &adapter->vdev->dev;
2979 unsigned long rc;
2980
2981 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2982 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2983 if (rc)
2984 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2985 scrq->hw_irq, rc);
2986 return rc;
2987 }
2988
2989 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2990 struct ibmvnic_sub_crq_queue *scrq)
2991 {
2992 struct device *dev = &adapter->vdev->dev;
2993 unsigned long rc;
2994
2995 if (scrq->hw_irq > 0x100000000ULL) {
2996 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2997 return 1;
2998 }
2999
3000 if (test_bit(0, &adapter->resetting) &&
3001 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3002 u64 val = (0xff000000) | scrq->hw_irq;
3003
3004 rc = plpar_hcall_norets(H_EOI, val);
3005 /* H_EOI would fail with rc = H_FUNCTION when running
3006 * in XIVE mode which is expected, but not an error.
3007 */
3008 if (rc && (rc != H_FUNCTION))
3009 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3010 val, rc);
3011 }
3012
3013 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3014 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3015 if (rc)
3016 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3017 scrq->hw_irq, rc);
3018 return rc;
3019 }
3020
3021 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3022 struct ibmvnic_sub_crq_queue *scrq)
3023 {
3024 struct device *dev = &adapter->vdev->dev;
3025 struct ibmvnic_tx_pool *tx_pool;
3026 struct ibmvnic_tx_buff *txbuff;
3027 union sub_crq *next;
3028 int index;
3029 int i, j;
3030
3031 restart_loop:
3032 while (pending_scrq(adapter, scrq)) {
3033 unsigned int pool = scrq->pool_index;
3034 int num_entries = 0;
3035
3036 next = ibmvnic_next_scrq(adapter, scrq);
3037 for (i = 0; i < next->tx_comp.num_comps; i++) {
3038 if (next->tx_comp.rcs[i]) {
3039 dev_err(dev, "tx error %x\n",
3040 next->tx_comp.rcs[i]);
3041 continue;
3042 }
3043 index = be32_to_cpu(next->tx_comp.correlators[i]);
3044 if (index & IBMVNIC_TSO_POOL_MASK) {
3045 tx_pool = &adapter->tso_pool[pool];
3046 index &= ~IBMVNIC_TSO_POOL_MASK;
3047 } else {
3048 tx_pool = &adapter->tx_pool[pool];
3049 }
3050
3051 txbuff = &tx_pool->tx_buff[index];
3052
3053 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3054 if (!txbuff->data_dma[j])
3055 continue;
3056
3057 txbuff->data_dma[j] = 0;
3058 }
3059
3060 if (txbuff->last_frag) {
3061 dev_kfree_skb_any(txbuff->skb);
3062 txbuff->skb = NULL;
3063 }
3064
3065 num_entries += txbuff->num_entries;
3066
3067 tx_pool->free_map[tx_pool->producer_index] = index;
3068 tx_pool->producer_index =
3069 (tx_pool->producer_index + 1) %
3070 tx_pool->num_buffers;
3071 }
3072 /* remove tx_comp scrq*/
3073 next->tx_comp.first = 0;
3074
3075 if (atomic_sub_return(num_entries, &scrq->used) <=
3076 (adapter->req_tx_entries_per_subcrq / 2) &&
3077 __netif_subqueue_stopped(adapter->netdev,
3078 scrq->pool_index)) {
3079 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3080 netdev_dbg(adapter->netdev, "Started queue %d\n",
3081 scrq->pool_index);
3082 }
3083 }
3084
3085 enable_scrq_irq(adapter, scrq);
3086
3087 if (pending_scrq(adapter, scrq)) {
3088 disable_scrq_irq(adapter, scrq);
3089 goto restart_loop;
3090 }
3091
3092 return 0;
3093 }
3094
3095 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3096 {
3097 struct ibmvnic_sub_crq_queue *scrq = instance;
3098 struct ibmvnic_adapter *adapter = scrq->adapter;
3099
3100 disable_scrq_irq(adapter, scrq);
3101 ibmvnic_complete_tx(adapter, scrq);
3102
3103 return IRQ_HANDLED;
3104 }
3105
3106 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3107 {
3108 struct ibmvnic_sub_crq_queue *scrq = instance;
3109 struct ibmvnic_adapter *adapter = scrq->adapter;
3110
3111 /* When booting a kdump kernel we can hit pending interrupts
3112 * prior to completing driver initialization.
3113 */
3114 if (unlikely(adapter->state != VNIC_OPEN))
3115 return IRQ_NONE;
3116
3117 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3118
3119 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3120 disable_scrq_irq(adapter, scrq);
3121 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3122 }
3123
3124 return IRQ_HANDLED;
3125 }
3126
3127 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3128 {
3129 struct device *dev = &adapter->vdev->dev;
3130 struct ibmvnic_sub_crq_queue *scrq;
3131 int i = 0, j = 0;
3132 int rc = 0;
3133
3134 for (i = 0; i < adapter->req_tx_queues; i++) {
3135 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3136 i);
3137 scrq = adapter->tx_scrq[i];
3138 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3139
3140 if (!scrq->irq) {
3141 rc = -EINVAL;
3142 dev_err(dev, "Error mapping irq\n");
3143 goto req_tx_irq_failed;
3144 }
3145
3146 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3147 adapter->vdev->unit_address, i);
3148 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3149 0, scrq->name, scrq);
3150
3151 if (rc) {
3152 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3153 scrq->irq, rc);
3154 irq_dispose_mapping(scrq->irq);
3155 goto req_tx_irq_failed;
3156 }
3157 }
3158
3159 for (i = 0; i < adapter->req_rx_queues; i++) {
3160 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3161 i);
3162 scrq = adapter->rx_scrq[i];
3163 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3164 if (!scrq->irq) {
3165 rc = -EINVAL;
3166 dev_err(dev, "Error mapping irq\n");
3167 goto req_rx_irq_failed;
3168 }
3169 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3170 adapter->vdev->unit_address, i);
3171 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3172 0, scrq->name, scrq);
3173 if (rc) {
3174 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3175 scrq->irq, rc);
3176 irq_dispose_mapping(scrq->irq);
3177 goto req_rx_irq_failed;
3178 }
3179 }
3180 return rc;
3181
3182 req_rx_irq_failed:
3183 for (j = 0; j < i; j++) {
3184 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3185 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3186 }
3187 i = adapter->req_tx_queues;
3188 req_tx_irq_failed:
3189 for (j = 0; j < i; j++) {
3190 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3191 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3192 }
3193 release_sub_crqs(adapter, 1);
3194 return rc;
3195 }
3196
3197 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3198 {
3199 struct device *dev = &adapter->vdev->dev;
3200 struct ibmvnic_sub_crq_queue **allqueues;
3201 int registered_queues = 0;
3202 int total_queues;
3203 int more = 0;
3204 int i;
3205
3206 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3207
3208 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3209 if (!allqueues)
3210 return -1;
3211
3212 for (i = 0; i < total_queues; i++) {
3213 allqueues[i] = init_sub_crq_queue(adapter);
3214 if (!allqueues[i]) {
3215 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3216 break;
3217 }
3218 registered_queues++;
3219 }
3220
3221 /* Make sure we were able to register the minimum number of queues */
3222 if (registered_queues <
3223 adapter->min_tx_queues + adapter->min_rx_queues) {
3224 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3225 goto tx_failed;
3226 }
3227
3228 /* Distribute the failed allocated queues*/
3229 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3230 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3231 switch (i % 3) {
3232 case 0:
3233 if (adapter->req_rx_queues > adapter->min_rx_queues)
3234 adapter->req_rx_queues--;
3235 else
3236 more++;
3237 break;
3238 case 1:
3239 if (adapter->req_tx_queues > adapter->min_tx_queues)
3240 adapter->req_tx_queues--;
3241 else
3242 more++;
3243 break;
3244 }
3245 }
3246
3247 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3248 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3249 if (!adapter->tx_scrq)
3250 goto tx_failed;
3251
3252 for (i = 0; i < adapter->req_tx_queues; i++) {
3253 adapter->tx_scrq[i] = allqueues[i];
3254 adapter->tx_scrq[i]->pool_index = i;
3255 adapter->num_active_tx_scrqs++;
3256 }
3257
3258 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3259 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3260 if (!adapter->rx_scrq)
3261 goto rx_failed;
3262
3263 for (i = 0; i < adapter->req_rx_queues; i++) {
3264 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3265 adapter->rx_scrq[i]->scrq_num = i;
3266 adapter->num_active_rx_scrqs++;
3267 }
3268
3269 kfree(allqueues);
3270 return 0;
3271
3272 rx_failed:
3273 kfree(adapter->tx_scrq);
3274 adapter->tx_scrq = NULL;
3275 tx_failed:
3276 for (i = 0; i < registered_queues; i++)
3277 release_sub_crq_queue(adapter, allqueues[i], 1);
3278 kfree(allqueues);
3279 return -1;
3280 }
3281
3282 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3283 {
3284 struct device *dev = &adapter->vdev->dev;
3285 union ibmvnic_crq crq;
3286 int max_entries;
3287
3288 if (!retry) {
3289 /* Sub-CRQ entries are 32 byte long */
3290 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3291
3292 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3293 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3294 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3295 return;
3296 }
3297
3298 if (adapter->desired.mtu)
3299 adapter->req_mtu = adapter->desired.mtu;
3300 else
3301 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3302
3303 if (!adapter->desired.tx_entries)
3304 adapter->desired.tx_entries =
3305 adapter->max_tx_entries_per_subcrq;
3306 if (!adapter->desired.rx_entries)
3307 adapter->desired.rx_entries =
3308 adapter->max_rx_add_entries_per_subcrq;
3309
3310 max_entries = IBMVNIC_MAX_LTB_SIZE /
3311 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3312
3313 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3314 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3315 adapter->desired.tx_entries = max_entries;
3316 }
3317
3318 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3319 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3320 adapter->desired.rx_entries = max_entries;
3321 }
3322
3323 if (adapter->desired.tx_entries)
3324 adapter->req_tx_entries_per_subcrq =
3325 adapter->desired.tx_entries;
3326 else
3327 adapter->req_tx_entries_per_subcrq =
3328 adapter->max_tx_entries_per_subcrq;
3329
3330 if (adapter->desired.rx_entries)
3331 adapter->req_rx_add_entries_per_subcrq =
3332 adapter->desired.rx_entries;
3333 else
3334 adapter->req_rx_add_entries_per_subcrq =
3335 adapter->max_rx_add_entries_per_subcrq;
3336
3337 if (adapter->desired.tx_queues)
3338 adapter->req_tx_queues =
3339 adapter->desired.tx_queues;
3340 else
3341 adapter->req_tx_queues =
3342 adapter->opt_tx_comp_sub_queues;
3343
3344 if (adapter->desired.rx_queues)
3345 adapter->req_rx_queues =
3346 adapter->desired.rx_queues;
3347 else
3348 adapter->req_rx_queues =
3349 adapter->opt_rx_comp_queues;
3350
3351 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3352 }
3353
3354 memset(&crq, 0, sizeof(crq));
3355 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3356 crq.request_capability.cmd = REQUEST_CAPABILITY;
3357
3358 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3359 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3360 atomic_inc(&adapter->running_cap_crqs);
3361 ibmvnic_send_crq(adapter, &crq);
3362
3363 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3364 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3365 atomic_inc(&adapter->running_cap_crqs);
3366 ibmvnic_send_crq(adapter, &crq);
3367
3368 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3369 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3370 atomic_inc(&adapter->running_cap_crqs);
3371 ibmvnic_send_crq(adapter, &crq);
3372
3373 crq.request_capability.capability =
3374 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3375 crq.request_capability.number =
3376 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3377 atomic_inc(&adapter->running_cap_crqs);
3378 ibmvnic_send_crq(adapter, &crq);
3379
3380 crq.request_capability.capability =
3381 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3382 crq.request_capability.number =
3383 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3384 atomic_inc(&adapter->running_cap_crqs);
3385 ibmvnic_send_crq(adapter, &crq);
3386
3387 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3388 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3389 atomic_inc(&adapter->running_cap_crqs);
3390 ibmvnic_send_crq(adapter, &crq);
3391
3392 if (adapter->netdev->flags & IFF_PROMISC) {
3393 if (adapter->promisc_supported) {
3394 crq.request_capability.capability =
3395 cpu_to_be16(PROMISC_REQUESTED);
3396 crq.request_capability.number = cpu_to_be64(1);
3397 atomic_inc(&adapter->running_cap_crqs);
3398 ibmvnic_send_crq(adapter, &crq);
3399 }
3400 } else {
3401 crq.request_capability.capability =
3402 cpu_to_be16(PROMISC_REQUESTED);
3403 crq.request_capability.number = cpu_to_be64(0);
3404 atomic_inc(&adapter->running_cap_crqs);
3405 ibmvnic_send_crq(adapter, &crq);
3406 }
3407 }
3408
3409 static int pending_scrq(struct ibmvnic_adapter *adapter,
3410 struct ibmvnic_sub_crq_queue *scrq)
3411 {
3412 union sub_crq *entry = &scrq->msgs[scrq->cur];
3413
3414 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3415 return 1;
3416 else
3417 return 0;
3418 }
3419
3420 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3421 struct ibmvnic_sub_crq_queue *scrq)
3422 {
3423 union sub_crq *entry;
3424 unsigned long flags;
3425
3426 spin_lock_irqsave(&scrq->lock, flags);
3427 entry = &scrq->msgs[scrq->cur];
3428 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3429 if (++scrq->cur == scrq->size)
3430 scrq->cur = 0;
3431 } else {
3432 entry = NULL;
3433 }
3434 spin_unlock_irqrestore(&scrq->lock, flags);
3435
3436 return entry;
3437 }
3438
3439 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3440 {
3441 struct ibmvnic_crq_queue *queue = &adapter->crq;
3442 union ibmvnic_crq *crq;
3443
3444 crq = &queue->msgs[queue->cur];
3445 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3446 if (++queue->cur == queue->size)
3447 queue->cur = 0;
3448 } else {
3449 crq = NULL;
3450 }
3451
3452 return crq;
3453 }
3454
3455 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3456 {
3457 switch (rc) {
3458 case H_PARAMETER:
3459 dev_warn_ratelimited(dev,
3460 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3461 func, rc);
3462 break;
3463 case H_CLOSED:
3464 dev_warn_ratelimited(dev,
3465 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3466 func, rc);
3467 break;
3468 default:
3469 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3470 break;
3471 }
3472 }
3473
3474 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3475 union sub_crq *sub_crq)
3476 {
3477 unsigned int ua = adapter->vdev->unit_address;
3478 struct device *dev = &adapter->vdev->dev;
3479 u64 *u64_crq = (u64 *)sub_crq;
3480 int rc;
3481
3482 netdev_dbg(adapter->netdev,
3483 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3484 (unsigned long int)cpu_to_be64(remote_handle),
3485 (unsigned long int)cpu_to_be64(u64_crq[0]),
3486 (unsigned long int)cpu_to_be64(u64_crq[1]),
3487 (unsigned long int)cpu_to_be64(u64_crq[2]),
3488 (unsigned long int)cpu_to_be64(u64_crq[3]));
3489
3490 /* Make sure the hypervisor sees the complete request */
3491 mb();
3492
3493 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3494 cpu_to_be64(remote_handle),
3495 cpu_to_be64(u64_crq[0]),
3496 cpu_to_be64(u64_crq[1]),
3497 cpu_to_be64(u64_crq[2]),
3498 cpu_to_be64(u64_crq[3]));
3499
3500 if (rc)
3501 print_subcrq_error(dev, rc, __func__);
3502
3503 return rc;
3504 }
3505
3506 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3507 u64 remote_handle, u64 ioba, u64 num_entries)
3508 {
3509 unsigned int ua = adapter->vdev->unit_address;
3510 struct device *dev = &adapter->vdev->dev;
3511 int rc;
3512
3513 /* Make sure the hypervisor sees the complete request */
3514 mb();
3515 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3516 cpu_to_be64(remote_handle),
3517 ioba, num_entries);
3518
3519 if (rc)
3520 print_subcrq_error(dev, rc, __func__);
3521
3522 return rc;
3523 }
3524
3525 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3526 union ibmvnic_crq *crq)
3527 {
3528 unsigned int ua = adapter->vdev->unit_address;
3529 struct device *dev = &adapter->vdev->dev;
3530 u64 *u64_crq = (u64 *)crq;
3531 int rc;
3532
3533 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3534 (unsigned long int)cpu_to_be64(u64_crq[0]),
3535 (unsigned long int)cpu_to_be64(u64_crq[1]));
3536
3537 if (!adapter->crq.active &&
3538 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3539 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3540 return -EINVAL;
3541 }
3542
3543 /* Make sure the hypervisor sees the complete request */
3544 mb();
3545
3546 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3547 cpu_to_be64(u64_crq[0]),
3548 cpu_to_be64(u64_crq[1]));
3549
3550 if (rc) {
3551 if (rc == H_CLOSED) {
3552 dev_warn(dev, "CRQ Queue closed\n");
3553 if (test_bit(0, &adapter->resetting))
3554 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3555 }
3556
3557 dev_warn(dev, "Send error (rc=%d)\n", rc);
3558 }
3559
3560 return rc;
3561 }
3562
3563 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3564 {
3565 union ibmvnic_crq crq;
3566
3567 memset(&crq, 0, sizeof(crq));
3568 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3569 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3570 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3571
3572 return ibmvnic_send_crq(adapter, &crq);
3573 }
3574
3575 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3576 {
3577 union ibmvnic_crq crq;
3578
3579 memset(&crq, 0, sizeof(crq));
3580 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3581 crq.version_exchange.cmd = VERSION_EXCHANGE;
3582 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3583
3584 return ibmvnic_send_crq(adapter, &crq);
3585 }
3586
3587 struct vnic_login_client_data {
3588 u8 type;
3589 __be16 len;
3590 char name[];
3591 } __packed;
3592
3593 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3594 {
3595 int len;
3596
3597 /* Calculate the amount of buffer space needed for the
3598 * vnic client data in the login buffer. There are four entries,
3599 * OS name, LPAR name, device name, and a null last entry.
3600 */
3601 len = 4 * sizeof(struct vnic_login_client_data);
3602 len += 6; /* "Linux" plus NULL */
3603 len += strlen(utsname()->nodename) + 1;
3604 len += strlen(adapter->netdev->name) + 1;
3605
3606 return len;
3607 }
3608
3609 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3610 struct vnic_login_client_data *vlcd)
3611 {
3612 const char *os_name = "Linux";
3613 int len;
3614
3615 /* Type 1 - LPAR OS */
3616 vlcd->type = 1;
3617 len = strlen(os_name) + 1;
3618 vlcd->len = cpu_to_be16(len);
3619 strncpy(vlcd->name, os_name, len);
3620 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3621
3622 /* Type 2 - LPAR name */
3623 vlcd->type = 2;
3624 len = strlen(utsname()->nodename) + 1;
3625 vlcd->len = cpu_to_be16(len);
3626 strncpy(vlcd->name, utsname()->nodename, len);
3627 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3628
3629 /* Type 3 - device name */
3630 vlcd->type = 3;
3631 len = strlen(adapter->netdev->name) + 1;
3632 vlcd->len = cpu_to_be16(len);
3633 strncpy(vlcd->name, adapter->netdev->name, len);
3634 }
3635
3636 static int send_login(struct ibmvnic_adapter *adapter)
3637 {
3638 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3639 struct ibmvnic_login_buffer *login_buffer;
3640 struct device *dev = &adapter->vdev->dev;
3641 dma_addr_t rsp_buffer_token;
3642 dma_addr_t buffer_token;
3643 size_t rsp_buffer_size;
3644 union ibmvnic_crq crq;
3645 size_t buffer_size;
3646 __be64 *tx_list_p;
3647 __be64 *rx_list_p;
3648 int client_data_len;
3649 struct vnic_login_client_data *vlcd;
3650 int i;
3651
3652 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3653 netdev_err(adapter->netdev,
3654 "RX or TX queues are not allocated, device login failed\n");
3655 return -1;
3656 }
3657
3658 release_login_rsp_buffer(adapter);
3659 client_data_len = vnic_client_data_len(adapter);
3660
3661 buffer_size =
3662 sizeof(struct ibmvnic_login_buffer) +
3663 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3664 client_data_len;
3665
3666 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3667 if (!login_buffer)
3668 goto buf_alloc_failed;
3669
3670 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3671 DMA_TO_DEVICE);
3672 if (dma_mapping_error(dev, buffer_token)) {
3673 dev_err(dev, "Couldn't map login buffer\n");
3674 goto buf_map_failed;
3675 }
3676
3677 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3678 sizeof(u64) * adapter->req_tx_queues +
3679 sizeof(u64) * adapter->req_rx_queues +
3680 sizeof(u64) * adapter->req_rx_queues +
3681 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3682
3683 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3684 if (!login_rsp_buffer)
3685 goto buf_rsp_alloc_failed;
3686
3687 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3688 rsp_buffer_size, DMA_FROM_DEVICE);
3689 if (dma_mapping_error(dev, rsp_buffer_token)) {
3690 dev_err(dev, "Couldn't map login rsp buffer\n");
3691 goto buf_rsp_map_failed;
3692 }
3693
3694 adapter->login_buf = login_buffer;
3695 adapter->login_buf_token = buffer_token;
3696 adapter->login_buf_sz = buffer_size;
3697 adapter->login_rsp_buf = login_rsp_buffer;
3698 adapter->login_rsp_buf_token = rsp_buffer_token;
3699 adapter->login_rsp_buf_sz = rsp_buffer_size;
3700
3701 login_buffer->len = cpu_to_be32(buffer_size);
3702 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3703 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3704 login_buffer->off_txcomp_subcrqs =
3705 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3706 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3707 login_buffer->off_rxcomp_subcrqs =
3708 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3709 sizeof(u64) * adapter->req_tx_queues);
3710 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3711 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3712
3713 tx_list_p = (__be64 *)((char *)login_buffer +
3714 sizeof(struct ibmvnic_login_buffer));
3715 rx_list_p = (__be64 *)((char *)login_buffer +
3716 sizeof(struct ibmvnic_login_buffer) +
3717 sizeof(u64) * adapter->req_tx_queues);
3718
3719 for (i = 0; i < adapter->req_tx_queues; i++) {
3720 if (adapter->tx_scrq[i]) {
3721 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3722 crq_num);
3723 }
3724 }
3725
3726 for (i = 0; i < adapter->req_rx_queues; i++) {
3727 if (adapter->rx_scrq[i]) {
3728 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3729 crq_num);
3730 }
3731 }
3732
3733 /* Insert vNIC login client data */
3734 vlcd = (struct vnic_login_client_data *)
3735 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3736 login_buffer->client_data_offset =
3737 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3738 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3739
3740 vnic_add_client_data(adapter, vlcd);
3741
3742 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3743 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3744 netdev_dbg(adapter->netdev, "%016lx\n",
3745 ((unsigned long int *)(adapter->login_buf))[i]);
3746 }
3747
3748 memset(&crq, 0, sizeof(crq));
3749 crq.login.first = IBMVNIC_CRQ_CMD;
3750 crq.login.cmd = LOGIN;
3751 crq.login.ioba = cpu_to_be32(buffer_token);
3752 crq.login.len = cpu_to_be32(buffer_size);
3753 ibmvnic_send_crq(adapter, &crq);
3754
3755 return 0;
3756
3757 buf_rsp_map_failed:
3758 kfree(login_rsp_buffer);
3759 buf_rsp_alloc_failed:
3760 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3761 buf_map_failed:
3762 kfree(login_buffer);
3763 buf_alloc_failed:
3764 return -1;
3765 }
3766
3767 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3768 u32 len, u8 map_id)
3769 {
3770 union ibmvnic_crq crq;
3771
3772 memset(&crq, 0, sizeof(crq));
3773 crq.request_map.first = IBMVNIC_CRQ_CMD;
3774 crq.request_map.cmd = REQUEST_MAP;
3775 crq.request_map.map_id = map_id;
3776 crq.request_map.ioba = cpu_to_be32(addr);
3777 crq.request_map.len = cpu_to_be32(len);
3778 return ibmvnic_send_crq(adapter, &crq);
3779 }
3780
3781 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3782 {
3783 union ibmvnic_crq crq;
3784
3785 memset(&crq, 0, sizeof(crq));
3786 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3787 crq.request_unmap.cmd = REQUEST_UNMAP;
3788 crq.request_unmap.map_id = map_id;
3789 return ibmvnic_send_crq(adapter, &crq);
3790 }
3791
3792 static void send_map_query(struct ibmvnic_adapter *adapter)
3793 {
3794 union ibmvnic_crq crq;
3795
3796 memset(&crq, 0, sizeof(crq));
3797 crq.query_map.first = IBMVNIC_CRQ_CMD;
3798 crq.query_map.cmd = QUERY_MAP;
3799 ibmvnic_send_crq(adapter, &crq);
3800 }
3801
3802 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3803 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3804 {
3805 union ibmvnic_crq crq;
3806
3807 atomic_set(&adapter->running_cap_crqs, 0);
3808 memset(&crq, 0, sizeof(crq));
3809 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3810 crq.query_capability.cmd = QUERY_CAPABILITY;
3811
3812 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3813 atomic_inc(&adapter->running_cap_crqs);
3814 ibmvnic_send_crq(adapter, &crq);
3815
3816 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3817 atomic_inc(&adapter->running_cap_crqs);
3818 ibmvnic_send_crq(adapter, &crq);
3819
3820 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3821 atomic_inc(&adapter->running_cap_crqs);
3822 ibmvnic_send_crq(adapter, &crq);
3823
3824 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3825 atomic_inc(&adapter->running_cap_crqs);
3826 ibmvnic_send_crq(adapter, &crq);
3827
3828 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3829 atomic_inc(&adapter->running_cap_crqs);
3830 ibmvnic_send_crq(adapter, &crq);
3831
3832 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3833 atomic_inc(&adapter->running_cap_crqs);
3834 ibmvnic_send_crq(adapter, &crq);
3835
3836 crq.query_capability.capability =
3837 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3838 atomic_inc(&adapter->running_cap_crqs);
3839 ibmvnic_send_crq(adapter, &crq);
3840
3841 crq.query_capability.capability =
3842 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3843 atomic_inc(&adapter->running_cap_crqs);
3844 ibmvnic_send_crq(adapter, &crq);
3845
3846 crq.query_capability.capability =
3847 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3848 atomic_inc(&adapter->running_cap_crqs);
3849 ibmvnic_send_crq(adapter, &crq);
3850
3851 crq.query_capability.capability =
3852 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3853 atomic_inc(&adapter->running_cap_crqs);
3854 ibmvnic_send_crq(adapter, &crq);
3855
3856 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3857 atomic_inc(&adapter->running_cap_crqs);
3858 ibmvnic_send_crq(adapter, &crq);
3859
3860 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3861 atomic_inc(&adapter->running_cap_crqs);
3862 ibmvnic_send_crq(adapter, &crq);
3863
3864 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3865 atomic_inc(&adapter->running_cap_crqs);
3866 ibmvnic_send_crq(adapter, &crq);
3867
3868 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3869 atomic_inc(&adapter->running_cap_crqs);
3870 ibmvnic_send_crq(adapter, &crq);
3871
3872 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3873 atomic_inc(&adapter->running_cap_crqs);
3874 ibmvnic_send_crq(adapter, &crq);
3875
3876 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3877 atomic_inc(&adapter->running_cap_crqs);
3878 ibmvnic_send_crq(adapter, &crq);
3879
3880 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3881 atomic_inc(&adapter->running_cap_crqs);
3882 ibmvnic_send_crq(adapter, &crq);
3883
3884 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3885 atomic_inc(&adapter->running_cap_crqs);
3886 ibmvnic_send_crq(adapter, &crq);
3887
3888 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3889 atomic_inc(&adapter->running_cap_crqs);
3890 ibmvnic_send_crq(adapter, &crq);
3891
3892 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3893 atomic_inc(&adapter->running_cap_crqs);
3894 ibmvnic_send_crq(adapter, &crq);
3895
3896 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3897 atomic_inc(&adapter->running_cap_crqs);
3898 ibmvnic_send_crq(adapter, &crq);
3899
3900 crq.query_capability.capability =
3901 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3902 atomic_inc(&adapter->running_cap_crqs);
3903 ibmvnic_send_crq(adapter, &crq);
3904
3905 crq.query_capability.capability =
3906 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3907 atomic_inc(&adapter->running_cap_crqs);
3908 ibmvnic_send_crq(adapter, &crq);
3909
3910 crq.query_capability.capability =
3911 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3912 atomic_inc(&adapter->running_cap_crqs);
3913 ibmvnic_send_crq(adapter, &crq);
3914
3915 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3916 atomic_inc(&adapter->running_cap_crqs);
3917 ibmvnic_send_crq(adapter, &crq);
3918 }
3919
3920 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3921 struct ibmvnic_adapter *adapter)
3922 {
3923 struct device *dev = &adapter->vdev->dev;
3924
3925 if (crq->get_vpd_size_rsp.rc.code) {
3926 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3927 crq->get_vpd_size_rsp.rc.code);
3928 complete(&adapter->fw_done);
3929 return;
3930 }
3931
3932 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3933 complete(&adapter->fw_done);
3934 }
3935
3936 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3937 struct ibmvnic_adapter *adapter)
3938 {
3939 struct device *dev = &adapter->vdev->dev;
3940 unsigned char *substr = NULL;
3941 u8 fw_level_len = 0;
3942
3943 memset(adapter->fw_version, 0, 32);
3944
3945 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3946 DMA_FROM_DEVICE);
3947
3948 if (crq->get_vpd_rsp.rc.code) {
3949 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3950 crq->get_vpd_rsp.rc.code);
3951 goto complete;
3952 }
3953
3954 /* get the position of the firmware version info
3955 * located after the ASCII 'RM' substring in the buffer
3956 */
3957 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3958 if (!substr) {
3959 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3960 goto complete;
3961 }
3962
3963 /* get length of firmware level ASCII substring */
3964 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3965 fw_level_len = *(substr + 2);
3966 } else {
3967 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3968 goto complete;
3969 }
3970
3971 /* copy firmware version string from vpd into adapter */
3972 if ((substr + 3 + fw_level_len) <
3973 (adapter->vpd->buff + adapter->vpd->len)) {
3974 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3975 } else {
3976 dev_info(dev, "FW substr extrapolated VPD buff\n");
3977 }
3978
3979 complete:
3980 if (adapter->fw_version[0] == '\0')
3981 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3982 complete(&adapter->fw_done);
3983 }
3984
3985 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3986 {
3987 struct device *dev = &adapter->vdev->dev;
3988 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3989 netdev_features_t old_hw_features = 0;
3990 union ibmvnic_crq crq;
3991 int i;
3992
3993 dma_unmap_single(dev, adapter->ip_offload_tok,
3994 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3995
3996 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3997 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3998 netdev_dbg(adapter->netdev, "%016lx\n",
3999 ((unsigned long int *)(buf))[i]);
4000
4001 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4002 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4003 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4004 buf->tcp_ipv4_chksum);
4005 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4006 buf->tcp_ipv6_chksum);
4007 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4008 buf->udp_ipv4_chksum);
4009 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4010 buf->udp_ipv6_chksum);
4011 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4012 buf->large_tx_ipv4);
4013 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4014 buf->large_tx_ipv6);
4015 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4016 buf->large_rx_ipv4);
4017 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4018 buf->large_rx_ipv6);
4019 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4020 buf->max_ipv4_header_size);
4021 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4022 buf->max_ipv6_header_size);
4023 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4024 buf->max_tcp_header_size);
4025 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4026 buf->max_udp_header_size);
4027 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4028 buf->max_large_tx_size);
4029 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4030 buf->max_large_rx_size);
4031 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4032 buf->ipv6_extension_header);
4033 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4034 buf->tcp_pseudosum_req);
4035 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4036 buf->num_ipv6_ext_headers);
4037 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4038 buf->off_ipv6_ext_headers);
4039
4040 adapter->ip_offload_ctrl_tok =
4041 dma_map_single(dev, &adapter->ip_offload_ctrl,
4042 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
4043
4044 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4045 dev_err(dev, "Couldn't map ip offload control buffer\n");
4046 return;
4047 }
4048
4049 adapter->ip_offload_ctrl.len =
4050 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4051 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
4052 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
4053 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
4054 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4055 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
4056 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4057 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
4058 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
4059 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
4060
4061 /* large_rx disabled for now, additional features needed */
4062 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
4063 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
4064
4065 if (adapter->state != VNIC_PROBING) {
4066 old_hw_features = adapter->netdev->hw_features;
4067 adapter->netdev->hw_features = 0;
4068 }
4069
4070 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4071
4072 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4073 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4074
4075 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4076 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4077
4078 if ((adapter->netdev->features &
4079 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4080 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4081
4082 if (buf->large_tx_ipv4)
4083 adapter->netdev->hw_features |= NETIF_F_TSO;
4084 if (buf->large_tx_ipv6)
4085 adapter->netdev->hw_features |= NETIF_F_TSO6;
4086
4087 if (adapter->state == VNIC_PROBING) {
4088 adapter->netdev->features |= adapter->netdev->hw_features;
4089 } else if (old_hw_features != adapter->netdev->hw_features) {
4090 netdev_features_t tmp = 0;
4091
4092 /* disable features no longer supported */
4093 adapter->netdev->features &= adapter->netdev->hw_features;
4094 /* turn on features now supported if previously enabled */
4095 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4096 adapter->netdev->hw_features;
4097 adapter->netdev->features |=
4098 tmp & adapter->netdev->wanted_features;
4099 }
4100
4101 memset(&crq, 0, sizeof(crq));
4102 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4103 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4104 crq.control_ip_offload.len =
4105 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4106 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4107 ibmvnic_send_crq(adapter, &crq);
4108 }
4109
4110 static const char *ibmvnic_fw_err_cause(u16 cause)
4111 {
4112 switch (cause) {
4113 case ADAPTER_PROBLEM:
4114 return "adapter problem";
4115 case BUS_PROBLEM:
4116 return "bus problem";
4117 case FW_PROBLEM:
4118 return "firmware problem";
4119 case DD_PROBLEM:
4120 return "device driver problem";
4121 case EEH_RECOVERY:
4122 return "EEH recovery";
4123 case FW_UPDATED:
4124 return "firmware updated";
4125 case LOW_MEMORY:
4126 return "low Memory";
4127 default:
4128 return "unknown";
4129 }
4130 }
4131
4132 static void handle_error_indication(union ibmvnic_crq *crq,
4133 struct ibmvnic_adapter *adapter)
4134 {
4135 struct device *dev = &adapter->vdev->dev;
4136 u16 cause;
4137
4138 cause = be16_to_cpu(crq->error_indication.error_cause);
4139
4140 dev_warn_ratelimited(dev,
4141 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4142 crq->error_indication.flags
4143 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4144 ibmvnic_fw_err_cause(cause));
4145
4146 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4147 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4148 else
4149 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4150 }
4151
4152 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4153 struct ibmvnic_adapter *adapter)
4154 {
4155 struct net_device *netdev = adapter->netdev;
4156 struct device *dev = &adapter->vdev->dev;
4157 long rc;
4158
4159 rc = crq->change_mac_addr_rsp.rc.code;
4160 if (rc) {
4161 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4162 goto out;
4163 }
4164 ether_addr_copy(netdev->dev_addr,
4165 &crq->change_mac_addr_rsp.mac_addr[0]);
4166 out:
4167 complete(&adapter->fw_done);
4168 return rc;
4169 }
4170
4171 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4172 struct ibmvnic_adapter *adapter)
4173 {
4174 struct device *dev = &adapter->vdev->dev;
4175 u64 *req_value;
4176 char *name;
4177
4178 atomic_dec(&adapter->running_cap_crqs);
4179 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4180 case REQ_TX_QUEUES:
4181 req_value = &adapter->req_tx_queues;
4182 name = "tx";
4183 break;
4184 case REQ_RX_QUEUES:
4185 req_value = &adapter->req_rx_queues;
4186 name = "rx";
4187 break;
4188 case REQ_RX_ADD_QUEUES:
4189 req_value = &adapter->req_rx_add_queues;
4190 name = "rx_add";
4191 break;
4192 case REQ_TX_ENTRIES_PER_SUBCRQ:
4193 req_value = &adapter->req_tx_entries_per_subcrq;
4194 name = "tx_entries_per_subcrq";
4195 break;
4196 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4197 req_value = &adapter->req_rx_add_entries_per_subcrq;
4198 name = "rx_add_entries_per_subcrq";
4199 break;
4200 case REQ_MTU:
4201 req_value = &adapter->req_mtu;
4202 name = "mtu";
4203 break;
4204 case PROMISC_REQUESTED:
4205 req_value = &adapter->promisc;
4206 name = "promisc";
4207 break;
4208 default:
4209 dev_err(dev, "Got invalid cap request rsp %d\n",
4210 crq->request_capability.capability);
4211 return;
4212 }
4213
4214 switch (crq->request_capability_rsp.rc.code) {
4215 case SUCCESS:
4216 break;
4217 case PARTIALSUCCESS:
4218 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4219 *req_value,
4220 (long int)be64_to_cpu(crq->request_capability_rsp.
4221 number), name);
4222
4223 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4224 REQ_MTU) {
4225 pr_err("mtu of %llu is not supported. Reverting.\n",
4226 *req_value);
4227 *req_value = adapter->fallback.mtu;
4228 } else {
4229 *req_value =
4230 be64_to_cpu(crq->request_capability_rsp.number);
4231 }
4232
4233 ibmvnic_send_req_caps(adapter, 1);
4234 return;
4235 default:
4236 dev_err(dev, "Error %d in request cap rsp\n",
4237 crq->request_capability_rsp.rc.code);
4238 return;
4239 }
4240
4241 /* Done receiving requested capabilities, query IP offload support */
4242 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4243 union ibmvnic_crq newcrq;
4244 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4245 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4246 &adapter->ip_offload_buf;
4247
4248 adapter->wait_capability = false;
4249 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4250 buf_sz,
4251 DMA_FROM_DEVICE);
4252
4253 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4254 if (!firmware_has_feature(FW_FEATURE_CMO))
4255 dev_err(dev, "Couldn't map offload buffer\n");
4256 return;
4257 }
4258
4259 memset(&newcrq, 0, sizeof(newcrq));
4260 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4261 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4262 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4263 newcrq.query_ip_offload.ioba =
4264 cpu_to_be32(adapter->ip_offload_tok);
4265
4266 ibmvnic_send_crq(adapter, &newcrq);
4267 }
4268 }
4269
4270 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4271 struct ibmvnic_adapter *adapter)
4272 {
4273 struct device *dev = &adapter->vdev->dev;
4274 struct net_device *netdev = adapter->netdev;
4275 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4276 struct ibmvnic_login_buffer *login = adapter->login_buf;
4277 int i;
4278
4279 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4280 DMA_TO_DEVICE);
4281 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4282 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4283
4284 /* If the number of queues requested can't be allocated by the
4285 * server, the login response will return with code 1. We will need
4286 * to resend the login buffer with fewer queues requested.
4287 */
4288 if (login_rsp_crq->generic.rc.code) {
4289 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4290 complete(&adapter->init_done);
4291 return 0;
4292 }
4293
4294 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4295
4296 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4297 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4298 netdev_dbg(adapter->netdev, "%016lx\n",
4299 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4300 }
4301
4302 /* Sanity checks */
4303 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4304 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4305 adapter->req_rx_add_queues !=
4306 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4307 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4308 ibmvnic_remove(adapter->vdev);
4309 return -EIO;
4310 }
4311 release_login_buffer(adapter);
4312 complete(&adapter->init_done);
4313
4314 return 0;
4315 }
4316
4317 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4318 struct ibmvnic_adapter *adapter)
4319 {
4320 struct device *dev = &adapter->vdev->dev;
4321 long rc;
4322
4323 rc = crq->request_unmap_rsp.rc.code;
4324 if (rc)
4325 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4326 }
4327
4328 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4329 struct ibmvnic_adapter *adapter)
4330 {
4331 struct net_device *netdev = adapter->netdev;
4332 struct device *dev = &adapter->vdev->dev;
4333 long rc;
4334
4335 rc = crq->query_map_rsp.rc.code;
4336 if (rc) {
4337 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4338 return;
4339 }
4340 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4341 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4342 crq->query_map_rsp.free_pages);
4343 }
4344
4345 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4346 struct ibmvnic_adapter *adapter)
4347 {
4348 struct net_device *netdev = adapter->netdev;
4349 struct device *dev = &adapter->vdev->dev;
4350 long rc;
4351
4352 atomic_dec(&adapter->running_cap_crqs);
4353 netdev_dbg(netdev, "Outstanding queries: %d\n",
4354 atomic_read(&adapter->running_cap_crqs));
4355 rc = crq->query_capability.rc.code;
4356 if (rc) {
4357 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4358 goto out;
4359 }
4360
4361 switch (be16_to_cpu(crq->query_capability.capability)) {
4362 case MIN_TX_QUEUES:
4363 adapter->min_tx_queues =
4364 be64_to_cpu(crq->query_capability.number);
4365 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4366 adapter->min_tx_queues);
4367 break;
4368 case MIN_RX_QUEUES:
4369 adapter->min_rx_queues =
4370 be64_to_cpu(crq->query_capability.number);
4371 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4372 adapter->min_rx_queues);
4373 break;
4374 case MIN_RX_ADD_QUEUES:
4375 adapter->min_rx_add_queues =
4376 be64_to_cpu(crq->query_capability.number);
4377 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4378 adapter->min_rx_add_queues);
4379 break;
4380 case MAX_TX_QUEUES:
4381 adapter->max_tx_queues =
4382 be64_to_cpu(crq->query_capability.number);
4383 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4384 adapter->max_tx_queues);
4385 break;
4386 case MAX_RX_QUEUES:
4387 adapter->max_rx_queues =
4388 be64_to_cpu(crq->query_capability.number);
4389 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4390 adapter->max_rx_queues);
4391 break;
4392 case MAX_RX_ADD_QUEUES:
4393 adapter->max_rx_add_queues =
4394 be64_to_cpu(crq->query_capability.number);
4395 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4396 adapter->max_rx_add_queues);
4397 break;
4398 case MIN_TX_ENTRIES_PER_SUBCRQ:
4399 adapter->min_tx_entries_per_subcrq =
4400 be64_to_cpu(crq->query_capability.number);
4401 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4402 adapter->min_tx_entries_per_subcrq);
4403 break;
4404 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4405 adapter->min_rx_add_entries_per_subcrq =
4406 be64_to_cpu(crq->query_capability.number);
4407 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4408 adapter->min_rx_add_entries_per_subcrq);
4409 break;
4410 case MAX_TX_ENTRIES_PER_SUBCRQ:
4411 adapter->max_tx_entries_per_subcrq =
4412 be64_to_cpu(crq->query_capability.number);
4413 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4414 adapter->max_tx_entries_per_subcrq);
4415 break;
4416 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4417 adapter->max_rx_add_entries_per_subcrq =
4418 be64_to_cpu(crq->query_capability.number);
4419 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4420 adapter->max_rx_add_entries_per_subcrq);
4421 break;
4422 case TCP_IP_OFFLOAD:
4423 adapter->tcp_ip_offload =
4424 be64_to_cpu(crq->query_capability.number);
4425 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4426 adapter->tcp_ip_offload);
4427 break;
4428 case PROMISC_SUPPORTED:
4429 adapter->promisc_supported =
4430 be64_to_cpu(crq->query_capability.number);
4431 netdev_dbg(netdev, "promisc_supported = %lld\n",
4432 adapter->promisc_supported);
4433 break;
4434 case MIN_MTU:
4435 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4436 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4437 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4438 break;
4439 case MAX_MTU:
4440 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4441 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4442 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4443 break;
4444 case MAX_MULTICAST_FILTERS:
4445 adapter->max_multicast_filters =
4446 be64_to_cpu(crq->query_capability.number);
4447 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4448 adapter->max_multicast_filters);
4449 break;
4450 case VLAN_HEADER_INSERTION:
4451 adapter->vlan_header_insertion =
4452 be64_to_cpu(crq->query_capability.number);
4453 if (adapter->vlan_header_insertion)
4454 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4455 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4456 adapter->vlan_header_insertion);
4457 break;
4458 case RX_VLAN_HEADER_INSERTION:
4459 adapter->rx_vlan_header_insertion =
4460 be64_to_cpu(crq->query_capability.number);
4461 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4462 adapter->rx_vlan_header_insertion);
4463 break;
4464 case MAX_TX_SG_ENTRIES:
4465 adapter->max_tx_sg_entries =
4466 be64_to_cpu(crq->query_capability.number);
4467 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4468 adapter->max_tx_sg_entries);
4469 break;
4470 case RX_SG_SUPPORTED:
4471 adapter->rx_sg_supported =
4472 be64_to_cpu(crq->query_capability.number);
4473 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4474 adapter->rx_sg_supported);
4475 break;
4476 case OPT_TX_COMP_SUB_QUEUES:
4477 adapter->opt_tx_comp_sub_queues =
4478 be64_to_cpu(crq->query_capability.number);
4479 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4480 adapter->opt_tx_comp_sub_queues);
4481 break;
4482 case OPT_RX_COMP_QUEUES:
4483 adapter->opt_rx_comp_queues =
4484 be64_to_cpu(crq->query_capability.number);
4485 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4486 adapter->opt_rx_comp_queues);
4487 break;
4488 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4489 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4490 be64_to_cpu(crq->query_capability.number);
4491 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4492 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4493 break;
4494 case OPT_TX_ENTRIES_PER_SUBCRQ:
4495 adapter->opt_tx_entries_per_subcrq =
4496 be64_to_cpu(crq->query_capability.number);
4497 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4498 adapter->opt_tx_entries_per_subcrq);
4499 break;
4500 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4501 adapter->opt_rxba_entries_per_subcrq =
4502 be64_to_cpu(crq->query_capability.number);
4503 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4504 adapter->opt_rxba_entries_per_subcrq);
4505 break;
4506 case TX_RX_DESC_REQ:
4507 adapter->tx_rx_desc_req = crq->query_capability.number;
4508 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4509 adapter->tx_rx_desc_req);
4510 break;
4511
4512 default:
4513 netdev_err(netdev, "Got invalid cap rsp %d\n",
4514 crq->query_capability.capability);
4515 }
4516
4517 out:
4518 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4519 adapter->wait_capability = false;
4520 ibmvnic_send_req_caps(adapter, 0);
4521 }
4522 }
4523
4524 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4525 {
4526 union ibmvnic_crq crq;
4527 int rc;
4528
4529 memset(&crq, 0, sizeof(crq));
4530 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4531 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4532
4533 mutex_lock(&adapter->fw_lock);
4534 adapter->fw_done_rc = 0;
4535 reinit_completion(&adapter->fw_done);
4536
4537 rc = ibmvnic_send_crq(adapter, &crq);
4538 if (rc) {
4539 mutex_unlock(&adapter->fw_lock);
4540 return rc;
4541 }
4542
4543 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4544 if (rc) {
4545 mutex_unlock(&adapter->fw_lock);
4546 return rc;
4547 }
4548
4549 mutex_unlock(&adapter->fw_lock);
4550 return adapter->fw_done_rc ? -EIO : 0;
4551 }
4552
4553 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4554 struct ibmvnic_adapter *adapter)
4555 {
4556 struct net_device *netdev = adapter->netdev;
4557 int rc;
4558 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4559
4560 rc = crq->query_phys_parms_rsp.rc.code;
4561 if (rc) {
4562 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4563 return rc;
4564 }
4565 switch (rspeed) {
4566 case IBMVNIC_10MBPS:
4567 adapter->speed = SPEED_10;
4568 break;
4569 case IBMVNIC_100MBPS:
4570 adapter->speed = SPEED_100;
4571 break;
4572 case IBMVNIC_1GBPS:
4573 adapter->speed = SPEED_1000;
4574 break;
4575 case IBMVNIC_10GBP:
4576 adapter->speed = SPEED_10000;
4577 break;
4578 case IBMVNIC_25GBPS:
4579 adapter->speed = SPEED_25000;
4580 break;
4581 case IBMVNIC_40GBPS:
4582 adapter->speed = SPEED_40000;
4583 break;
4584 case IBMVNIC_50GBPS:
4585 adapter->speed = SPEED_50000;
4586 break;
4587 case IBMVNIC_100GBPS:
4588 adapter->speed = SPEED_100000;
4589 break;
4590 default:
4591 if (netif_carrier_ok(netdev))
4592 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4593 adapter->speed = SPEED_UNKNOWN;
4594 }
4595 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4596 adapter->duplex = DUPLEX_FULL;
4597 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4598 adapter->duplex = DUPLEX_HALF;
4599 else
4600 adapter->duplex = DUPLEX_UNKNOWN;
4601
4602 return rc;
4603 }
4604
4605 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4606 struct ibmvnic_adapter *adapter)
4607 {
4608 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4609 struct net_device *netdev = adapter->netdev;
4610 struct device *dev = &adapter->vdev->dev;
4611 u64 *u64_crq = (u64 *)crq;
4612 long rc;
4613
4614 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4615 (unsigned long int)cpu_to_be64(u64_crq[0]),
4616 (unsigned long int)cpu_to_be64(u64_crq[1]));
4617 switch (gen_crq->first) {
4618 case IBMVNIC_CRQ_INIT_RSP:
4619 switch (gen_crq->cmd) {
4620 case IBMVNIC_CRQ_INIT:
4621 dev_info(dev, "Partner initialized\n");
4622 adapter->from_passive_init = true;
4623 adapter->failover_pending = false;
4624 if (!completion_done(&adapter->init_done)) {
4625 complete(&adapter->init_done);
4626 adapter->init_done_rc = -EIO;
4627 }
4628 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4629 break;
4630 case IBMVNIC_CRQ_INIT_COMPLETE:
4631 dev_info(dev, "Partner initialization complete\n");
4632 adapter->crq.active = true;
4633 send_version_xchg(adapter);
4634 break;
4635 default:
4636 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4637 }
4638 return;
4639 case IBMVNIC_CRQ_XPORT_EVENT:
4640 netif_carrier_off(netdev);
4641 adapter->crq.active = false;
4642 /* terminate any thread waiting for a response
4643 * from the device
4644 */
4645 if (!completion_done(&adapter->fw_done)) {
4646 adapter->fw_done_rc = -EIO;
4647 complete(&adapter->fw_done);
4648 }
4649 if (!completion_done(&adapter->stats_done))
4650 complete(&adapter->stats_done);
4651 if (test_bit(0, &adapter->resetting))
4652 adapter->force_reset_recovery = true;
4653 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4654 dev_info(dev, "Migrated, re-enabling adapter\n");
4655 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4656 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4657 dev_info(dev, "Backing device failover detected\n");
4658 adapter->failover_pending = true;
4659 } else {
4660 /* The adapter lost the connection */
4661 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4662 gen_crq->cmd);
4663 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4664 }
4665 return;
4666 case IBMVNIC_CRQ_CMD_RSP:
4667 break;
4668 default:
4669 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4670 gen_crq->first);
4671 return;
4672 }
4673
4674 switch (gen_crq->cmd) {
4675 case VERSION_EXCHANGE_RSP:
4676 rc = crq->version_exchange_rsp.rc.code;
4677 if (rc) {
4678 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4679 break;
4680 }
4681 dev_info(dev, "Partner protocol version is %d\n",
4682 crq->version_exchange_rsp.version);
4683 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4684 ibmvnic_version)
4685 ibmvnic_version =
4686 be16_to_cpu(crq->version_exchange_rsp.version);
4687 send_cap_queries(adapter);
4688 break;
4689 case QUERY_CAPABILITY_RSP:
4690 handle_query_cap_rsp(crq, adapter);
4691 break;
4692 case QUERY_MAP_RSP:
4693 handle_query_map_rsp(crq, adapter);
4694 break;
4695 case REQUEST_MAP_RSP:
4696 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4697 complete(&adapter->fw_done);
4698 break;
4699 case REQUEST_UNMAP_RSP:
4700 handle_request_unmap_rsp(crq, adapter);
4701 break;
4702 case REQUEST_CAPABILITY_RSP:
4703 handle_request_cap_rsp(crq, adapter);
4704 break;
4705 case LOGIN_RSP:
4706 netdev_dbg(netdev, "Got Login Response\n");
4707 handle_login_rsp(crq, adapter);
4708 break;
4709 case LOGICAL_LINK_STATE_RSP:
4710 netdev_dbg(netdev,
4711 "Got Logical Link State Response, state: %d rc: %d\n",
4712 crq->logical_link_state_rsp.link_state,
4713 crq->logical_link_state_rsp.rc.code);
4714 adapter->logical_link_state =
4715 crq->logical_link_state_rsp.link_state;
4716 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4717 complete(&adapter->init_done);
4718 break;
4719 case LINK_STATE_INDICATION:
4720 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4721 adapter->phys_link_state =
4722 crq->link_state_indication.phys_link_state;
4723 adapter->logical_link_state =
4724 crq->link_state_indication.logical_link_state;
4725 if (adapter->phys_link_state && adapter->logical_link_state)
4726 netif_carrier_on(netdev);
4727 else
4728 netif_carrier_off(netdev);
4729 break;
4730 case CHANGE_MAC_ADDR_RSP:
4731 netdev_dbg(netdev, "Got MAC address change Response\n");
4732 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4733 break;
4734 case ERROR_INDICATION:
4735 netdev_dbg(netdev, "Got Error Indication\n");
4736 handle_error_indication(crq, adapter);
4737 break;
4738 case REQUEST_STATISTICS_RSP:
4739 netdev_dbg(netdev, "Got Statistics Response\n");
4740 complete(&adapter->stats_done);
4741 break;
4742 case QUERY_IP_OFFLOAD_RSP:
4743 netdev_dbg(netdev, "Got Query IP offload Response\n");
4744 handle_query_ip_offload_rsp(adapter);
4745 break;
4746 case MULTICAST_CTRL_RSP:
4747 netdev_dbg(netdev, "Got multicast control Response\n");
4748 break;
4749 case CONTROL_IP_OFFLOAD_RSP:
4750 netdev_dbg(netdev, "Got Control IP offload Response\n");
4751 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4752 sizeof(adapter->ip_offload_ctrl),
4753 DMA_TO_DEVICE);
4754 complete(&adapter->init_done);
4755 break;
4756 case COLLECT_FW_TRACE_RSP:
4757 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4758 complete(&adapter->fw_done);
4759 break;
4760 case GET_VPD_SIZE_RSP:
4761 handle_vpd_size_rsp(crq, adapter);
4762 break;
4763 case GET_VPD_RSP:
4764 handle_vpd_rsp(crq, adapter);
4765 break;
4766 case QUERY_PHYS_PARMS_RSP:
4767 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4768 complete(&adapter->fw_done);
4769 break;
4770 default:
4771 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4772 gen_crq->cmd);
4773 }
4774 }
4775
4776 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4777 {
4778 struct ibmvnic_adapter *adapter = instance;
4779
4780 tasklet_schedule(&adapter->tasklet);
4781 return IRQ_HANDLED;
4782 }
4783
4784 static void ibmvnic_tasklet(void *data)
4785 {
4786 struct ibmvnic_adapter *adapter = data;
4787 struct ibmvnic_crq_queue *queue = &adapter->crq;
4788 union ibmvnic_crq *crq;
4789 unsigned long flags;
4790 bool done = false;
4791
4792 spin_lock_irqsave(&queue->lock, flags);
4793 while (!done) {
4794 /* Pull all the valid messages off the CRQ */
4795 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4796 ibmvnic_handle_crq(crq, adapter);
4797 crq->generic.first = 0;
4798 }
4799
4800 /* remain in tasklet until all
4801 * capabilities responses are received
4802 */
4803 if (!adapter->wait_capability)
4804 done = true;
4805 }
4806 /* if capabilities CRQ's were sent in this tasklet, the following
4807 * tasklet must wait until all responses are received
4808 */
4809 if (atomic_read(&adapter->running_cap_crqs) != 0)
4810 adapter->wait_capability = true;
4811 spin_unlock_irqrestore(&queue->lock, flags);
4812 }
4813
4814 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4815 {
4816 struct vio_dev *vdev = adapter->vdev;
4817 int rc;
4818
4819 do {
4820 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4821 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4822
4823 if (rc)
4824 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4825
4826 return rc;
4827 }
4828
4829 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4830 {
4831 struct ibmvnic_crq_queue *crq = &adapter->crq;
4832 struct device *dev = &adapter->vdev->dev;
4833 struct vio_dev *vdev = adapter->vdev;
4834 int rc;
4835
4836 /* Close the CRQ */
4837 do {
4838 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4839 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4840
4841 /* Clean out the queue */
4842 memset(crq->msgs, 0, PAGE_SIZE);
4843 crq->cur = 0;
4844 crq->active = false;
4845
4846 /* And re-open it again */
4847 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4848 crq->msg_token, PAGE_SIZE);
4849
4850 if (rc == H_CLOSED)
4851 /* Adapter is good, but other end is not ready */
4852 dev_warn(dev, "Partner adapter not ready\n");
4853 else if (rc != 0)
4854 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4855
4856 return rc;
4857 }
4858
4859 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4860 {
4861 struct ibmvnic_crq_queue *crq = &adapter->crq;
4862 struct vio_dev *vdev = adapter->vdev;
4863 long rc;
4864
4865 if (!crq->msgs)
4866 return;
4867
4868 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4869 free_irq(vdev->irq, adapter);
4870 tasklet_kill(&adapter->tasklet);
4871 do {
4872 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4873 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4874
4875 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4876 DMA_BIDIRECTIONAL);
4877 free_page((unsigned long)crq->msgs);
4878 crq->msgs = NULL;
4879 crq->active = false;
4880 }
4881
4882 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4883 {
4884 struct ibmvnic_crq_queue *crq = &adapter->crq;
4885 struct device *dev = &adapter->vdev->dev;
4886 struct vio_dev *vdev = adapter->vdev;
4887 int rc, retrc = -ENOMEM;
4888
4889 if (crq->msgs)
4890 return 0;
4891
4892 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4893 /* Should we allocate more than one page? */
4894
4895 if (!crq->msgs)
4896 return -ENOMEM;
4897
4898 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4899 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4900 DMA_BIDIRECTIONAL);
4901 if (dma_mapping_error(dev, crq->msg_token))
4902 goto map_failed;
4903
4904 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4905 crq->msg_token, PAGE_SIZE);
4906
4907 if (rc == H_RESOURCE)
4908 /* maybe kexecing and resource is busy. try a reset */
4909 rc = ibmvnic_reset_crq(adapter);
4910 retrc = rc;
4911
4912 if (rc == H_CLOSED) {
4913 dev_warn(dev, "Partner adapter not ready\n");
4914 } else if (rc) {
4915 dev_warn(dev, "Error %d opening adapter\n", rc);
4916 goto reg_crq_failed;
4917 }
4918
4919 retrc = 0;
4920
4921 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4922 (unsigned long)adapter);
4923
4924 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4925 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4926 adapter->vdev->unit_address);
4927 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4928 if (rc) {
4929 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4930 vdev->irq, rc);
4931 goto req_irq_failed;
4932 }
4933
4934 rc = vio_enable_interrupts(vdev);
4935 if (rc) {
4936 dev_err(dev, "Error %d enabling interrupts\n", rc);
4937 goto req_irq_failed;
4938 }
4939
4940 crq->cur = 0;
4941 spin_lock_init(&crq->lock);
4942
4943 return retrc;
4944
4945 req_irq_failed:
4946 tasklet_kill(&adapter->tasklet);
4947 do {
4948 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4949 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4950 reg_crq_failed:
4951 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4952 map_failed:
4953 free_page((unsigned long)crq->msgs);
4954 crq->msgs = NULL;
4955 return retrc;
4956 }
4957
4958 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4959 {
4960 struct device *dev = &adapter->vdev->dev;
4961 unsigned long timeout = msecs_to_jiffies(30000);
4962 u64 old_num_rx_queues, old_num_tx_queues;
4963 int rc;
4964
4965 adapter->from_passive_init = false;
4966
4967 old_num_rx_queues = adapter->req_rx_queues;
4968 old_num_tx_queues = adapter->req_tx_queues;
4969
4970 reinit_completion(&adapter->init_done);
4971 adapter->init_done_rc = 0;
4972 ibmvnic_send_crq_init(adapter);
4973 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4974 dev_err(dev, "Initialization sequence timed out\n");
4975 return -1;
4976 }
4977
4978 if (adapter->init_done_rc) {
4979 release_crq_queue(adapter);
4980 return adapter->init_done_rc;
4981 }
4982
4983 if (adapter->from_passive_init) {
4984 adapter->state = VNIC_OPEN;
4985 adapter->from_passive_init = false;
4986 return -1;
4987 }
4988
4989 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
4990 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4991 if (adapter->req_rx_queues != old_num_rx_queues ||
4992 adapter->req_tx_queues != old_num_tx_queues) {
4993 release_sub_crqs(adapter, 0);
4994 rc = init_sub_crqs(adapter);
4995 } else {
4996 rc = reset_sub_crq_queues(adapter);
4997 }
4998 } else {
4999 rc = init_sub_crqs(adapter);
5000 }
5001
5002 if (rc) {
5003 dev_err(dev, "Initialization of sub crqs failed\n");
5004 release_crq_queue(adapter);
5005 return rc;
5006 }
5007
5008 rc = init_sub_crq_irqs(adapter);
5009 if (rc) {
5010 dev_err(dev, "Failed to initialize sub crq irqs\n");
5011 release_crq_queue(adapter);
5012 }
5013
5014 return rc;
5015 }
5016
5017 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
5018 {
5019 struct device *dev = &adapter->vdev->dev;
5020 unsigned long timeout = msecs_to_jiffies(30000);
5021 int rc;
5022
5023 adapter->from_passive_init = false;
5024
5025 adapter->init_done_rc = 0;
5026 ibmvnic_send_crq_init(adapter);
5027 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5028 dev_err(dev, "Initialization sequence timed out\n");
5029 return -1;
5030 }
5031
5032 if (adapter->init_done_rc) {
5033 release_crq_queue(adapter);
5034 return adapter->init_done_rc;
5035 }
5036
5037 if (adapter->from_passive_init) {
5038 adapter->state = VNIC_OPEN;
5039 adapter->from_passive_init = false;
5040 return -1;
5041 }
5042
5043 rc = init_sub_crqs(adapter);
5044 if (rc) {
5045 dev_err(dev, "Initialization of sub crqs failed\n");
5046 release_crq_queue(adapter);
5047 return rc;
5048 }
5049
5050 rc = init_sub_crq_irqs(adapter);
5051 if (rc) {
5052 dev_err(dev, "Failed to initialize sub crq irqs\n");
5053 release_crq_queue(adapter);
5054 }
5055
5056 return rc;
5057 }
5058
5059 static struct device_attribute dev_attr_failover;
5060
5061 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5062 {
5063 struct ibmvnic_adapter *adapter;
5064 struct net_device *netdev;
5065 unsigned char *mac_addr_p;
5066 int rc;
5067
5068 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5069 dev->unit_address);
5070
5071 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5072 VETH_MAC_ADDR, NULL);
5073 if (!mac_addr_p) {
5074 dev_err(&dev->dev,
5075 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5076 __FILE__, __LINE__);
5077 return 0;
5078 }
5079
5080 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5081 IBMVNIC_MAX_QUEUES);
5082 if (!netdev)
5083 return -ENOMEM;
5084
5085 adapter = netdev_priv(netdev);
5086 adapter->state = VNIC_PROBING;
5087 dev_set_drvdata(&dev->dev, netdev);
5088 adapter->vdev = dev;
5089 adapter->netdev = netdev;
5090
5091 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5092 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5093 netdev->irq = dev->irq;
5094 netdev->netdev_ops = &ibmvnic_netdev_ops;
5095 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5096 SET_NETDEV_DEV(netdev, &dev->dev);
5097
5098 spin_lock_init(&adapter->stats_lock);
5099
5100 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5101 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5102 __ibmvnic_delayed_reset);
5103 INIT_LIST_HEAD(&adapter->rwi_list);
5104 spin_lock_init(&adapter->rwi_lock);
5105 spin_lock_init(&adapter->state_lock);
5106 mutex_init(&adapter->fw_lock);
5107 init_completion(&adapter->init_done);
5108 init_completion(&adapter->fw_done);
5109 init_completion(&adapter->reset_done);
5110 init_completion(&adapter->stats_done);
5111 clear_bit(0, &adapter->resetting);
5112
5113 do {
5114 rc = init_crq_queue(adapter);
5115 if (rc) {
5116 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5117 rc);
5118 goto ibmvnic_init_fail;
5119 }
5120
5121 rc = ibmvnic_init(adapter);
5122 if (rc && rc != EAGAIN)
5123 goto ibmvnic_init_fail;
5124 } while (rc == EAGAIN);
5125
5126 rc = init_stats_buffers(adapter);
5127 if (rc)
5128 goto ibmvnic_init_fail;
5129
5130 rc = init_stats_token(adapter);
5131 if (rc)
5132 goto ibmvnic_stats_fail;
5133
5134 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5135 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5136 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5137
5138 rc = device_create_file(&dev->dev, &dev_attr_failover);
5139 if (rc)
5140 goto ibmvnic_dev_file_err;
5141
5142 netif_carrier_off(netdev);
5143 rc = register_netdev(netdev);
5144 if (rc) {
5145 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5146 goto ibmvnic_register_fail;
5147 }
5148 dev_info(&dev->dev, "ibmvnic registered\n");
5149
5150 adapter->state = VNIC_PROBED;
5151
5152 adapter->wait_for_reset = false;
5153
5154 return 0;
5155
5156 ibmvnic_register_fail:
5157 device_remove_file(&dev->dev, &dev_attr_failover);
5158
5159 ibmvnic_dev_file_err:
5160 release_stats_token(adapter);
5161
5162 ibmvnic_stats_fail:
5163 release_stats_buffers(adapter);
5164
5165 ibmvnic_init_fail:
5166 release_sub_crqs(adapter, 1);
5167 release_crq_queue(adapter);
5168 mutex_destroy(&adapter->fw_lock);
5169 free_netdev(netdev);
5170
5171 return rc;
5172 }
5173
5174 static int ibmvnic_remove(struct vio_dev *dev)
5175 {
5176 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5177 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5178 unsigned long flags;
5179
5180 spin_lock_irqsave(&adapter->state_lock, flags);
5181 if (adapter->state == VNIC_RESETTING) {
5182 spin_unlock_irqrestore(&adapter->state_lock, flags);
5183 return -EBUSY;
5184 }
5185
5186 adapter->state = VNIC_REMOVING;
5187 spin_unlock_irqrestore(&adapter->state_lock, flags);
5188
5189 rtnl_lock();
5190 unregister_netdevice(netdev);
5191
5192 release_resources(adapter);
5193 release_sub_crqs(adapter, 1);
5194 release_crq_queue(adapter);
5195
5196 release_stats_token(adapter);
5197 release_stats_buffers(adapter);
5198
5199 adapter->state = VNIC_REMOVED;
5200
5201 rtnl_unlock();
5202 mutex_destroy(&adapter->fw_lock);
5203 device_remove_file(&dev->dev, &dev_attr_failover);
5204 free_netdev(netdev);
5205 dev_set_drvdata(&dev->dev, NULL);
5206
5207 return 0;
5208 }
5209
5210 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5211 const char *buf, size_t count)
5212 {
5213 struct net_device *netdev = dev_get_drvdata(dev);
5214 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5215 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5216 __be64 session_token;
5217 long rc;
5218
5219 if (!sysfs_streq(buf, "1"))
5220 return -EINVAL;
5221
5222 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5223 H_GET_SESSION_TOKEN, 0, 0, 0);
5224 if (rc) {
5225 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5226 rc);
5227 return -EINVAL;
5228 }
5229
5230 session_token = (__be64)retbuf[0];
5231 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5232 be64_to_cpu(session_token));
5233 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5234 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5235 if (rc) {
5236 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5237 rc);
5238 return -EINVAL;
5239 }
5240
5241 return count;
5242 }
5243
5244 static DEVICE_ATTR_WO(failover);
5245
5246 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5247 {
5248 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5249 struct ibmvnic_adapter *adapter;
5250 struct iommu_table *tbl;
5251 unsigned long ret = 0;
5252 int i;
5253
5254 tbl = get_iommu_table_base(&vdev->dev);
5255
5256 /* netdev inits at probe time along with the structures we need below*/
5257 if (!netdev)
5258 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5259
5260 adapter = netdev_priv(netdev);
5261
5262 ret += PAGE_SIZE; /* the crq message queue */
5263 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5264
5265 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5266 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5267
5268 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5269 i++)
5270 ret += adapter->rx_pool[i].size *
5271 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5272
5273 return ret;
5274 }
5275
5276 static int ibmvnic_resume(struct device *dev)
5277 {
5278 struct net_device *netdev = dev_get_drvdata(dev);
5279 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5280
5281 if (adapter->state != VNIC_OPEN)
5282 return 0;
5283
5284 tasklet_schedule(&adapter->tasklet);
5285
5286 return 0;
5287 }
5288
5289 static const struct vio_device_id ibmvnic_device_table[] = {
5290 {"network", "IBM,vnic"},
5291 {"", "" }
5292 };
5293 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5294
5295 static const struct dev_pm_ops ibmvnic_pm_ops = {
5296 .resume = ibmvnic_resume
5297 };
5298
5299 static struct vio_driver ibmvnic_driver = {
5300 .id_table = ibmvnic_device_table,
5301 .probe = ibmvnic_probe,
5302 .remove = ibmvnic_remove,
5303 .get_desired_dma = ibmvnic_get_desired_dma,
5304 .name = ibmvnic_driver_name,
5305 .pm = &ibmvnic_pm_ops,
5306 };
5307
5308 /* module functions */
5309 static int __init ibmvnic_module_init(void)
5310 {
5311 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5312 IBMVNIC_DRIVER_VERSION);
5313
5314 return vio_register_driver(&ibmvnic_driver);
5315 }
5316
5317 static void __exit ibmvnic_module_exit(void)
5318 {
5319 vio_unregister_driver(&ibmvnic_driver);
5320 }
5321
5322 module_init(ibmvnic_module_init);
5323 module_exit(ibmvnic_module_exit);
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