1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4 #include "iavf_status.h"
5 #include "iavf_type.h"
6 #include "iavf_register.h"
7 #include "iavf_adminq.h"
8 #include "iavf_prototype.h"
9
10 /**
11 * iavf_alloc_adminq_asq_ring - Allocate Admin Queue send rings
12 * @hw: pointer to the hardware structure
13 **/
iavf_alloc_adminq_asq_ring(struct iavf_hw * hw)14 static enum iavf_status iavf_alloc_adminq_asq_ring(struct iavf_hw *hw)
15 {
16 enum iavf_status ret_code;
17
18 ret_code = iavf_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
19 iavf_mem_atq_ring,
20 (hw->aq.num_asq_entries *
21 sizeof(struct iavf_aq_desc)),
22 IAVF_ADMINQ_DESC_ALIGNMENT);
23 if (ret_code)
24 return ret_code;
25
26 ret_code = iavf_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
27 (hw->aq.num_asq_entries *
28 sizeof(struct iavf_asq_cmd_details)));
29 if (ret_code) {
30 iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf);
31 return ret_code;
32 }
33
34 return ret_code;
35 }
36
37 /**
38 * iavf_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
39 * @hw: pointer to the hardware structure
40 **/
iavf_alloc_adminq_arq_ring(struct iavf_hw * hw)41 static enum iavf_status iavf_alloc_adminq_arq_ring(struct iavf_hw *hw)
42 {
43 enum iavf_status ret_code;
44
45 ret_code = iavf_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
46 iavf_mem_arq_ring,
47 (hw->aq.num_arq_entries *
48 sizeof(struct iavf_aq_desc)),
49 IAVF_ADMINQ_DESC_ALIGNMENT);
50
51 return ret_code;
52 }
53
54 /**
55 * iavf_free_adminq_asq - Free Admin Queue send rings
56 * @hw: pointer to the hardware structure
57 *
58 * This assumes the posted send buffers have already been cleaned
59 * and de-allocated
60 **/
iavf_free_adminq_asq(struct iavf_hw * hw)61 static void iavf_free_adminq_asq(struct iavf_hw *hw)
62 {
63 iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf);
64 }
65
66 /**
67 * iavf_free_adminq_arq - Free Admin Queue receive rings
68 * @hw: pointer to the hardware structure
69 *
70 * This assumes the posted receive buffers have already been cleaned
71 * and de-allocated
72 **/
iavf_free_adminq_arq(struct iavf_hw * hw)73 static void iavf_free_adminq_arq(struct iavf_hw *hw)
74 {
75 iavf_free_dma_mem(hw, &hw->aq.arq.desc_buf);
76 }
77
78 /**
79 * iavf_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
80 * @hw: pointer to the hardware structure
81 **/
iavf_alloc_arq_bufs(struct iavf_hw * hw)82 static enum iavf_status iavf_alloc_arq_bufs(struct iavf_hw *hw)
83 {
84 struct iavf_aq_desc *desc;
85 struct iavf_dma_mem *bi;
86 enum iavf_status ret_code;
87 int i;
88
89 /* We'll be allocating the buffer info memory first, then we can
90 * allocate the mapped buffers for the event processing
91 */
92
93 /* buffer_info structures do not need alignment */
94 ret_code = iavf_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
95 (hw->aq.num_arq_entries *
96 sizeof(struct iavf_dma_mem)));
97 if (ret_code)
98 goto alloc_arq_bufs;
99 hw->aq.arq.r.arq_bi = (struct iavf_dma_mem *)hw->aq.arq.dma_head.va;
100
101 /* allocate the mapped buffers */
102 for (i = 0; i < hw->aq.num_arq_entries; i++) {
103 bi = &hw->aq.arq.r.arq_bi[i];
104 ret_code = iavf_allocate_dma_mem(hw, bi,
105 iavf_mem_arq_buf,
106 hw->aq.arq_buf_size,
107 IAVF_ADMINQ_DESC_ALIGNMENT);
108 if (ret_code)
109 goto unwind_alloc_arq_bufs;
110
111 /* now configure the descriptors for use */
112 desc = IAVF_ADMINQ_DESC(hw->aq.arq, i);
113
114 desc->flags = cpu_to_le16(IAVF_AQ_FLAG_BUF);
115 if (hw->aq.arq_buf_size > IAVF_AQ_LARGE_BUF)
116 desc->flags |= cpu_to_le16(IAVF_AQ_FLAG_LB);
117 desc->opcode = 0;
118 /* This is in accordance with Admin queue design, there is no
119 * register for buffer size configuration
120 */
121 desc->datalen = cpu_to_le16((u16)bi->size);
122 desc->retval = 0;
123 desc->cookie_high = 0;
124 desc->cookie_low = 0;
125 desc->params.external.addr_high =
126 cpu_to_le32(upper_32_bits(bi->pa));
127 desc->params.external.addr_low =
128 cpu_to_le32(lower_32_bits(bi->pa));
129 desc->params.external.param0 = 0;
130 desc->params.external.param1 = 0;
131 }
132
133 alloc_arq_bufs:
134 return ret_code;
135
136 unwind_alloc_arq_bufs:
137 /* don't try to free the one that failed... */
138 i--;
139 for (; i >= 0; i--)
140 iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
141 iavf_free_virt_mem(hw, &hw->aq.arq.dma_head);
142
143 return ret_code;
144 }
145
146 /**
147 * iavf_alloc_asq_bufs - Allocate empty buffer structs for the send queue
148 * @hw: pointer to the hardware structure
149 **/
iavf_alloc_asq_bufs(struct iavf_hw * hw)150 static enum iavf_status iavf_alloc_asq_bufs(struct iavf_hw *hw)
151 {
152 struct iavf_dma_mem *bi;
153 enum iavf_status ret_code;
154 int i;
155
156 /* No mapped memory needed yet, just the buffer info structures */
157 ret_code = iavf_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
158 (hw->aq.num_asq_entries *
159 sizeof(struct iavf_dma_mem)));
160 if (ret_code)
161 goto alloc_asq_bufs;
162 hw->aq.asq.r.asq_bi = (struct iavf_dma_mem *)hw->aq.asq.dma_head.va;
163
164 /* allocate the mapped buffers */
165 for (i = 0; i < hw->aq.num_asq_entries; i++) {
166 bi = &hw->aq.asq.r.asq_bi[i];
167 ret_code = iavf_allocate_dma_mem(hw, bi,
168 iavf_mem_asq_buf,
169 hw->aq.asq_buf_size,
170 IAVF_ADMINQ_DESC_ALIGNMENT);
171 if (ret_code)
172 goto unwind_alloc_asq_bufs;
173 }
174 alloc_asq_bufs:
175 return ret_code;
176
177 unwind_alloc_asq_bufs:
178 /* don't try to free the one that failed... */
179 i--;
180 for (; i >= 0; i--)
181 iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
182 iavf_free_virt_mem(hw, &hw->aq.asq.dma_head);
183
184 return ret_code;
185 }
186
187 /**
188 * iavf_free_arq_bufs - Free receive queue buffer info elements
189 * @hw: pointer to the hardware structure
190 **/
iavf_free_arq_bufs(struct iavf_hw * hw)191 static void iavf_free_arq_bufs(struct iavf_hw *hw)
192 {
193 int i;
194
195 /* free descriptors */
196 for (i = 0; i < hw->aq.num_arq_entries; i++)
197 iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
198
199 /* free the descriptor memory */
200 iavf_free_dma_mem(hw, &hw->aq.arq.desc_buf);
201
202 /* free the dma header */
203 iavf_free_virt_mem(hw, &hw->aq.arq.dma_head);
204 }
205
206 /**
207 * iavf_free_asq_bufs - Free send queue buffer info elements
208 * @hw: pointer to the hardware structure
209 **/
iavf_free_asq_bufs(struct iavf_hw * hw)210 static void iavf_free_asq_bufs(struct iavf_hw *hw)
211 {
212 int i;
213
214 /* only unmap if the address is non-NULL */
215 for (i = 0; i < hw->aq.num_asq_entries; i++)
216 if (hw->aq.asq.r.asq_bi[i].pa)
217 iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
218
219 /* free the buffer info list */
220 iavf_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
221
222 /* free the descriptor memory */
223 iavf_free_dma_mem(hw, &hw->aq.asq.desc_buf);
224
225 /* free the dma header */
226 iavf_free_virt_mem(hw, &hw->aq.asq.dma_head);
227 }
228
229 /**
230 * iavf_config_asq_regs - configure ASQ registers
231 * @hw: pointer to the hardware structure
232 *
233 * Configure base address and length registers for the transmit queue
234 **/
iavf_config_asq_regs(struct iavf_hw * hw)235 static enum iavf_status iavf_config_asq_regs(struct iavf_hw *hw)
236 {
237 enum iavf_status ret_code = 0;
238 u32 reg = 0;
239
240 /* Clear Head and Tail */
241 wr32(hw, IAVF_VF_ATQH1, 0);
242 wr32(hw, IAVF_VF_ATQT1, 0);
243
244 /* set starting point */
245 wr32(hw, IAVF_VF_ATQLEN1, (hw->aq.num_asq_entries |
246 IAVF_VF_ATQLEN1_ATQENABLE_MASK));
247 wr32(hw, IAVF_VF_ATQBAL1, lower_32_bits(hw->aq.asq.desc_buf.pa));
248 wr32(hw, IAVF_VF_ATQBAH1, upper_32_bits(hw->aq.asq.desc_buf.pa));
249
250 /* Check one register to verify that config was applied */
251 reg = rd32(hw, IAVF_VF_ATQBAL1);
252 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
253 ret_code = IAVF_ERR_ADMIN_QUEUE_ERROR;
254
255 return ret_code;
256 }
257
258 /**
259 * iavf_config_arq_regs - ARQ register configuration
260 * @hw: pointer to the hardware structure
261 *
262 * Configure base address and length registers for the receive (event queue)
263 **/
iavf_config_arq_regs(struct iavf_hw * hw)264 static enum iavf_status iavf_config_arq_regs(struct iavf_hw *hw)
265 {
266 enum iavf_status ret_code = 0;
267 u32 reg = 0;
268
269 /* Clear Head and Tail */
270 wr32(hw, IAVF_VF_ARQH1, 0);
271 wr32(hw, IAVF_VF_ARQT1, 0);
272
273 /* set starting point */
274 wr32(hw, IAVF_VF_ARQLEN1, (hw->aq.num_arq_entries |
275 IAVF_VF_ARQLEN1_ARQENABLE_MASK));
276 wr32(hw, IAVF_VF_ARQBAL1, lower_32_bits(hw->aq.arq.desc_buf.pa));
277 wr32(hw, IAVF_VF_ARQBAH1, upper_32_bits(hw->aq.arq.desc_buf.pa));
278
279 /* Update tail in the HW to post pre-allocated buffers */
280 wr32(hw, IAVF_VF_ARQT1, hw->aq.num_arq_entries - 1);
281
282 /* Check one register to verify that config was applied */
283 reg = rd32(hw, IAVF_VF_ARQBAL1);
284 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
285 ret_code = IAVF_ERR_ADMIN_QUEUE_ERROR;
286
287 return ret_code;
288 }
289
290 /**
291 * iavf_init_asq - main initialization routine for ASQ
292 * @hw: pointer to the hardware structure
293 *
294 * This is the main initialization routine for the Admin Send Queue
295 * Prior to calling this function, drivers *MUST* set the following fields
296 * in the hw->aq structure:
297 * - hw->aq.num_asq_entries
298 * - hw->aq.arq_buf_size
299 *
300 * Do *NOT* hold the lock when calling this as the memory allocation routines
301 * called are not going to be atomic context safe
302 **/
iavf_init_asq(struct iavf_hw * hw)303 static enum iavf_status iavf_init_asq(struct iavf_hw *hw)
304 {
305 enum iavf_status ret_code = 0;
306 int i;
307
308 if (hw->aq.asq.count > 0) {
309 /* queue already initialized */
310 ret_code = IAVF_ERR_NOT_READY;
311 goto init_adminq_exit;
312 }
313
314 /* verify input for valid configuration */
315 if ((hw->aq.num_asq_entries == 0) ||
316 (hw->aq.asq_buf_size == 0)) {
317 ret_code = IAVF_ERR_CONFIG;
318 goto init_adminq_exit;
319 }
320
321 hw->aq.asq.next_to_use = 0;
322 hw->aq.asq.next_to_clean = 0;
323
324 /* allocate the ring memory */
325 ret_code = iavf_alloc_adminq_asq_ring(hw);
326 if (ret_code)
327 goto init_adminq_exit;
328
329 /* allocate buffers in the rings */
330 ret_code = iavf_alloc_asq_bufs(hw);
331 if (ret_code)
332 goto init_adminq_free_rings;
333
334 /* initialize base registers */
335 ret_code = iavf_config_asq_regs(hw);
336 if (ret_code)
337 goto init_free_asq_bufs;
338
339 /* success! */
340 hw->aq.asq.count = hw->aq.num_asq_entries;
341 goto init_adminq_exit;
342
343 init_free_asq_bufs:
344 for (i = 0; i < hw->aq.num_asq_entries; i++)
345 iavf_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
346 iavf_free_virt_mem(hw, &hw->aq.asq.dma_head);
347
348 init_adminq_free_rings:
349 iavf_free_adminq_asq(hw);
350
351 init_adminq_exit:
352 return ret_code;
353 }
354
355 /**
356 * iavf_init_arq - initialize ARQ
357 * @hw: pointer to the hardware structure
358 *
359 * The main initialization routine for the Admin Receive (Event) Queue.
360 * Prior to calling this function, drivers *MUST* set the following fields
361 * in the hw->aq structure:
362 * - hw->aq.num_asq_entries
363 * - hw->aq.arq_buf_size
364 *
365 * Do *NOT* hold the lock when calling this as the memory allocation routines
366 * called are not going to be atomic context safe
367 **/
iavf_init_arq(struct iavf_hw * hw)368 static enum iavf_status iavf_init_arq(struct iavf_hw *hw)
369 {
370 enum iavf_status ret_code = 0;
371 int i;
372
373 if (hw->aq.arq.count > 0) {
374 /* queue already initialized */
375 ret_code = IAVF_ERR_NOT_READY;
376 goto init_adminq_exit;
377 }
378
379 /* verify input for valid configuration */
380 if ((hw->aq.num_arq_entries == 0) ||
381 (hw->aq.arq_buf_size == 0)) {
382 ret_code = IAVF_ERR_CONFIG;
383 goto init_adminq_exit;
384 }
385
386 hw->aq.arq.next_to_use = 0;
387 hw->aq.arq.next_to_clean = 0;
388
389 /* allocate the ring memory */
390 ret_code = iavf_alloc_adminq_arq_ring(hw);
391 if (ret_code)
392 goto init_adminq_exit;
393
394 /* allocate buffers in the rings */
395 ret_code = iavf_alloc_arq_bufs(hw);
396 if (ret_code)
397 goto init_adminq_free_rings;
398
399 /* initialize base registers */
400 ret_code = iavf_config_arq_regs(hw);
401 if (ret_code)
402 goto init_free_arq_bufs;
403
404 /* success! */
405 hw->aq.arq.count = hw->aq.num_arq_entries;
406 goto init_adminq_exit;
407
408 init_free_arq_bufs:
409 for (i = 0; i < hw->aq.num_arq_entries; i++)
410 iavf_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
411 iavf_free_virt_mem(hw, &hw->aq.arq.dma_head);
412 init_adminq_free_rings:
413 iavf_free_adminq_arq(hw);
414
415 init_adminq_exit:
416 return ret_code;
417 }
418
419 /**
420 * iavf_shutdown_asq - shutdown the ASQ
421 * @hw: pointer to the hardware structure
422 *
423 * The main shutdown routine for the Admin Send Queue
424 **/
iavf_shutdown_asq(struct iavf_hw * hw)425 static enum iavf_status iavf_shutdown_asq(struct iavf_hw *hw)
426 {
427 enum iavf_status ret_code = 0;
428
429 mutex_lock(&hw->aq.asq_mutex);
430
431 if (hw->aq.asq.count == 0) {
432 ret_code = IAVF_ERR_NOT_READY;
433 goto shutdown_asq_out;
434 }
435
436 /* Stop firmware AdminQ processing */
437 wr32(hw, IAVF_VF_ATQH1, 0);
438 wr32(hw, IAVF_VF_ATQT1, 0);
439 wr32(hw, IAVF_VF_ATQLEN1, 0);
440 wr32(hw, IAVF_VF_ATQBAL1, 0);
441 wr32(hw, IAVF_VF_ATQBAH1, 0);
442
443 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
444
445 /* free ring buffers */
446 iavf_free_asq_bufs(hw);
447
448 shutdown_asq_out:
449 mutex_unlock(&hw->aq.asq_mutex);
450 return ret_code;
451 }
452
453 /**
454 * iavf_shutdown_arq - shutdown ARQ
455 * @hw: pointer to the hardware structure
456 *
457 * The main shutdown routine for the Admin Receive Queue
458 **/
iavf_shutdown_arq(struct iavf_hw * hw)459 static enum iavf_status iavf_shutdown_arq(struct iavf_hw *hw)
460 {
461 enum iavf_status ret_code = 0;
462
463 mutex_lock(&hw->aq.arq_mutex);
464
465 if (hw->aq.arq.count == 0) {
466 ret_code = IAVF_ERR_NOT_READY;
467 goto shutdown_arq_out;
468 }
469
470 /* Stop firmware AdminQ processing */
471 wr32(hw, IAVF_VF_ARQH1, 0);
472 wr32(hw, IAVF_VF_ARQT1, 0);
473 wr32(hw, IAVF_VF_ARQLEN1, 0);
474 wr32(hw, IAVF_VF_ARQBAL1, 0);
475 wr32(hw, IAVF_VF_ARQBAH1, 0);
476
477 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
478
479 /* free ring buffers */
480 iavf_free_arq_bufs(hw);
481
482 shutdown_arq_out:
483 mutex_unlock(&hw->aq.arq_mutex);
484 return ret_code;
485 }
486
487 /**
488 * iavf_init_adminq - main initialization routine for Admin Queue
489 * @hw: pointer to the hardware structure
490 *
491 * Prior to calling this function, drivers *MUST* set the following fields
492 * in the hw->aq structure:
493 * - hw->aq.num_asq_entries
494 * - hw->aq.num_arq_entries
495 * - hw->aq.arq_buf_size
496 * - hw->aq.asq_buf_size
497 **/
iavf_init_adminq(struct iavf_hw * hw)498 enum iavf_status iavf_init_adminq(struct iavf_hw *hw)
499 {
500 enum iavf_status ret_code;
501
502 /* verify input for valid configuration */
503 if ((hw->aq.num_arq_entries == 0) ||
504 (hw->aq.num_asq_entries == 0) ||
505 (hw->aq.arq_buf_size == 0) ||
506 (hw->aq.asq_buf_size == 0)) {
507 ret_code = IAVF_ERR_CONFIG;
508 goto init_adminq_exit;
509 }
510
511 /* setup ASQ command write back timeout */
512 hw->aq.asq_cmd_timeout = IAVF_ASQ_CMD_TIMEOUT;
513
514 /* allocate the ASQ */
515 ret_code = iavf_init_asq(hw);
516 if (ret_code)
517 goto init_adminq_destroy_locks;
518
519 /* allocate the ARQ */
520 ret_code = iavf_init_arq(hw);
521 if (ret_code)
522 goto init_adminq_free_asq;
523
524 /* success! */
525 goto init_adminq_exit;
526
527 init_adminq_free_asq:
528 iavf_shutdown_asq(hw);
529 init_adminq_destroy_locks:
530
531 init_adminq_exit:
532 return ret_code;
533 }
534
535 /**
536 * iavf_shutdown_adminq - shutdown routine for the Admin Queue
537 * @hw: pointer to the hardware structure
538 **/
iavf_shutdown_adminq(struct iavf_hw * hw)539 enum iavf_status iavf_shutdown_adminq(struct iavf_hw *hw)
540 {
541 if (iavf_check_asq_alive(hw))
542 iavf_aq_queue_shutdown(hw, true);
543
544 iavf_shutdown_asq(hw);
545 iavf_shutdown_arq(hw);
546
547 return 0;
548 }
549
550 /**
551 * iavf_clean_asq - cleans Admin send queue
552 * @hw: pointer to the hardware structure
553 *
554 * returns the number of free desc
555 **/
iavf_clean_asq(struct iavf_hw * hw)556 static u16 iavf_clean_asq(struct iavf_hw *hw)
557 {
558 struct iavf_adminq_ring *asq = &hw->aq.asq;
559 struct iavf_asq_cmd_details *details;
560 u16 ntc = asq->next_to_clean;
561 struct iavf_aq_desc desc_cb;
562 struct iavf_aq_desc *desc;
563
564 desc = IAVF_ADMINQ_DESC(*asq, ntc);
565 details = IAVF_ADMINQ_DETAILS(*asq, ntc);
566 while (rd32(hw, IAVF_VF_ATQH1) != ntc) {
567 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
568 "ntc %d head %d.\n", ntc, rd32(hw, IAVF_VF_ATQH1));
569
570 if (details->callback) {
571 IAVF_ADMINQ_CALLBACK cb_func =
572 (IAVF_ADMINQ_CALLBACK)details->callback;
573 desc_cb = *desc;
574 cb_func(hw, &desc_cb);
575 }
576 memset((void *)desc, 0, sizeof(struct iavf_aq_desc));
577 memset((void *)details, 0,
578 sizeof(struct iavf_asq_cmd_details));
579 ntc++;
580 if (ntc == asq->count)
581 ntc = 0;
582 desc = IAVF_ADMINQ_DESC(*asq, ntc);
583 details = IAVF_ADMINQ_DETAILS(*asq, ntc);
584 }
585
586 asq->next_to_clean = ntc;
587
588 return IAVF_DESC_UNUSED(asq);
589 }
590
591 /**
592 * iavf_asq_done - check if FW has processed the Admin Send Queue
593 * @hw: pointer to the hw struct
594 *
595 * Returns true if the firmware has processed all descriptors on the
596 * admin send queue. Returns false if there are still requests pending.
597 **/
iavf_asq_done(struct iavf_hw * hw)598 bool iavf_asq_done(struct iavf_hw *hw)
599 {
600 /* AQ designers suggest use of head for better
601 * timing reliability than DD bit
602 */
603 return rd32(hw, IAVF_VF_ATQH1) == hw->aq.asq.next_to_use;
604 }
605
606 /**
607 * iavf_asq_send_command - send command to Admin Queue
608 * @hw: pointer to the hw struct
609 * @desc: prefilled descriptor describing the command (non DMA mem)
610 * @buff: buffer to use for indirect commands
611 * @buff_size: size of buffer for indirect commands
612 * @cmd_details: pointer to command details structure
613 *
614 * This is the main send command driver routine for the Admin Queue send
615 * queue. It runs the queue, cleans the queue, etc
616 **/
iavf_asq_send_command(struct iavf_hw * hw,struct iavf_aq_desc * desc,void * buff,u16 buff_size,struct iavf_asq_cmd_details * cmd_details)617 enum iavf_status iavf_asq_send_command(struct iavf_hw *hw,
618 struct iavf_aq_desc *desc,
619 void *buff, /* can be NULL */
620 u16 buff_size,
621 struct iavf_asq_cmd_details *cmd_details)
622 {
623 struct iavf_dma_mem *dma_buff = NULL;
624 struct iavf_asq_cmd_details *details;
625 struct iavf_aq_desc *desc_on_ring;
626 bool cmd_completed = false;
627 enum iavf_status status = 0;
628 u16 retval = 0;
629 u32 val = 0;
630
631 mutex_lock(&hw->aq.asq_mutex);
632
633 if (hw->aq.asq.count == 0) {
634 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
635 "AQTX: Admin queue not initialized.\n");
636 status = IAVF_ERR_QUEUE_EMPTY;
637 goto asq_send_command_error;
638 }
639
640 hw->aq.asq_last_status = IAVF_AQ_RC_OK;
641
642 val = rd32(hw, IAVF_VF_ATQH1);
643 if (val >= hw->aq.num_asq_entries) {
644 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
645 "AQTX: head overrun at %d\n", val);
646 status = IAVF_ERR_QUEUE_EMPTY;
647 goto asq_send_command_error;
648 }
649
650 details = IAVF_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
651 if (cmd_details) {
652 *details = *cmd_details;
653
654 /* If the cmd_details are defined copy the cookie. The
655 * cpu_to_le32 is not needed here because the data is ignored
656 * by the FW, only used by the driver
657 */
658 if (details->cookie) {
659 desc->cookie_high =
660 cpu_to_le32(upper_32_bits(details->cookie));
661 desc->cookie_low =
662 cpu_to_le32(lower_32_bits(details->cookie));
663 }
664 } else {
665 memset(details, 0, sizeof(struct iavf_asq_cmd_details));
666 }
667
668 /* clear requested flags and then set additional flags if defined */
669 desc->flags &= ~cpu_to_le16(details->flags_dis);
670 desc->flags |= cpu_to_le16(details->flags_ena);
671
672 if (buff_size > hw->aq.asq_buf_size) {
673 iavf_debug(hw,
674 IAVF_DEBUG_AQ_MESSAGE,
675 "AQTX: Invalid buffer size: %d.\n",
676 buff_size);
677 status = IAVF_ERR_INVALID_SIZE;
678 goto asq_send_command_error;
679 }
680
681 if (details->postpone && !details->async) {
682 iavf_debug(hw,
683 IAVF_DEBUG_AQ_MESSAGE,
684 "AQTX: Async flag not set along with postpone flag");
685 status = IAVF_ERR_PARAM;
686 goto asq_send_command_error;
687 }
688
689 /* call clean and check queue available function to reclaim the
690 * descriptors that were processed by FW, the function returns the
691 * number of desc available
692 */
693 /* the clean function called here could be called in a separate thread
694 * in case of asynchronous completions
695 */
696 if (iavf_clean_asq(hw) == 0) {
697 iavf_debug(hw,
698 IAVF_DEBUG_AQ_MESSAGE,
699 "AQTX: Error queue is full.\n");
700 status = IAVF_ERR_ADMIN_QUEUE_FULL;
701 goto asq_send_command_error;
702 }
703
704 /* initialize the temp desc pointer with the right desc */
705 desc_on_ring = IAVF_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
706
707 /* if the desc is available copy the temp desc to the right place */
708 *desc_on_ring = *desc;
709
710 /* if buff is not NULL assume indirect command */
711 if (buff) {
712 dma_buff = &hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use];
713 /* copy the user buff into the respective DMA buff */
714 memcpy(dma_buff->va, buff, buff_size);
715 desc_on_ring->datalen = cpu_to_le16(buff_size);
716
717 /* Update the address values in the desc with the pa value
718 * for respective buffer
719 */
720 desc_on_ring->params.external.addr_high =
721 cpu_to_le32(upper_32_bits(dma_buff->pa));
722 desc_on_ring->params.external.addr_low =
723 cpu_to_le32(lower_32_bits(dma_buff->pa));
724 }
725
726 /* bump the tail */
727 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, "AQTX: desc and buffer:\n");
728 iavf_debug_aq(hw, IAVF_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
729 buff, buff_size);
730 (hw->aq.asq.next_to_use)++;
731 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
732 hw->aq.asq.next_to_use = 0;
733 if (!details->postpone)
734 wr32(hw, IAVF_VF_ATQT1, hw->aq.asq.next_to_use);
735
736 /* if cmd_details are not defined or async flag is not set,
737 * we need to wait for desc write back
738 */
739 if (!details->async && !details->postpone) {
740 u32 total_delay = 0;
741
742 do {
743 /* AQ designers suggest use of head for better
744 * timing reliability than DD bit
745 */
746 if (iavf_asq_done(hw))
747 break;
748 udelay(50);
749 total_delay += 50;
750 } while (total_delay < hw->aq.asq_cmd_timeout);
751 }
752
753 /* if ready, copy the desc back to temp */
754 if (iavf_asq_done(hw)) {
755 *desc = *desc_on_ring;
756 if (buff)
757 memcpy(buff, dma_buff->va, buff_size);
758 retval = le16_to_cpu(desc->retval);
759 if (retval != 0) {
760 iavf_debug(hw,
761 IAVF_DEBUG_AQ_MESSAGE,
762 "AQTX: Command completed with error 0x%X.\n",
763 retval);
764
765 /* strip off FW internal code */
766 retval &= 0xff;
767 }
768 cmd_completed = true;
769 if ((enum iavf_admin_queue_err)retval == IAVF_AQ_RC_OK)
770 status = 0;
771 else if ((enum iavf_admin_queue_err)retval == IAVF_AQ_RC_EBUSY)
772 status = IAVF_ERR_NOT_READY;
773 else
774 status = IAVF_ERR_ADMIN_QUEUE_ERROR;
775 hw->aq.asq_last_status = (enum iavf_admin_queue_err)retval;
776 }
777
778 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
779 "AQTX: desc and buffer writeback:\n");
780 iavf_debug_aq(hw, IAVF_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
781
782 /* save writeback aq if requested */
783 if (details->wb_desc)
784 *details->wb_desc = *desc_on_ring;
785
786 /* update the error if time out occurred */
787 if ((!cmd_completed) &&
788 (!details->async && !details->postpone)) {
789 if (rd32(hw, IAVF_VF_ATQLEN1) & IAVF_VF_ATQLEN1_ATQCRIT_MASK) {
790 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
791 "AQTX: AQ Critical error.\n");
792 status = IAVF_ERR_ADMIN_QUEUE_CRITICAL_ERROR;
793 } else {
794 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
795 "AQTX: Writeback timeout.\n");
796 status = IAVF_ERR_ADMIN_QUEUE_TIMEOUT;
797 }
798 }
799
800 asq_send_command_error:
801 mutex_unlock(&hw->aq.asq_mutex);
802 return status;
803 }
804
805 /**
806 * iavf_fill_default_direct_cmd_desc - AQ descriptor helper function
807 * @desc: pointer to the temp descriptor (non DMA mem)
808 * @opcode: the opcode can be used to decide which flags to turn off or on
809 *
810 * Fill the desc with default values
811 **/
iavf_fill_default_direct_cmd_desc(struct iavf_aq_desc * desc,u16 opcode)812 void iavf_fill_default_direct_cmd_desc(struct iavf_aq_desc *desc, u16 opcode)
813 {
814 /* zero out the desc */
815 memset((void *)desc, 0, sizeof(struct iavf_aq_desc));
816 desc->opcode = cpu_to_le16(opcode);
817 desc->flags = cpu_to_le16(IAVF_AQ_FLAG_SI);
818 }
819
820 /**
821 * iavf_clean_arq_element
822 * @hw: pointer to the hw struct
823 * @e: event info from the receive descriptor, includes any buffers
824 * @pending: number of events that could be left to process
825 *
826 * This function cleans one Admin Receive Queue element and returns
827 * the contents through e. It can also return how many events are
828 * left to process through 'pending'
829 **/
iavf_clean_arq_element(struct iavf_hw * hw,struct iavf_arq_event_info * e,u16 * pending)830 enum iavf_status iavf_clean_arq_element(struct iavf_hw *hw,
831 struct iavf_arq_event_info *e,
832 u16 *pending)
833 {
834 u16 ntc = hw->aq.arq.next_to_clean;
835 struct iavf_aq_desc *desc;
836 enum iavf_status ret_code = 0;
837 struct iavf_dma_mem *bi;
838 u16 desc_idx;
839 u16 datalen;
840 u16 flags;
841 u16 ntu;
842
843 /* pre-clean the event info */
844 memset(&e->desc, 0, sizeof(e->desc));
845
846 /* take the lock before we start messing with the ring */
847 mutex_lock(&hw->aq.arq_mutex);
848
849 if (hw->aq.arq.count == 0) {
850 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE,
851 "AQRX: Admin queue not initialized.\n");
852 ret_code = IAVF_ERR_QUEUE_EMPTY;
853 goto clean_arq_element_err;
854 }
855
856 /* set next_to_use to head */
857 ntu = rd32(hw, IAVF_VF_ARQH1) & IAVF_VF_ARQH1_ARQH_MASK;
858 if (ntu == ntc) {
859 /* nothing to do - shouldn't need to update ring's values */
860 ret_code = IAVF_ERR_ADMIN_QUEUE_NO_WORK;
861 goto clean_arq_element_out;
862 }
863
864 /* now clean the next descriptor */
865 desc = IAVF_ADMINQ_DESC(hw->aq.arq, ntc);
866 desc_idx = ntc;
867
868 hw->aq.arq_last_status =
869 (enum iavf_admin_queue_err)le16_to_cpu(desc->retval);
870 flags = le16_to_cpu(desc->flags);
871 if (flags & IAVF_AQ_FLAG_ERR) {
872 ret_code = IAVF_ERR_ADMIN_QUEUE_ERROR;
873 iavf_debug(hw,
874 IAVF_DEBUG_AQ_MESSAGE,
875 "AQRX: Event received with error 0x%X.\n",
876 hw->aq.arq_last_status);
877 }
878
879 e->desc = *desc;
880 datalen = le16_to_cpu(desc->datalen);
881 e->msg_len = min(datalen, e->buf_len);
882 if (e->msg_buf && (e->msg_len != 0))
883 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
884 e->msg_len);
885
886 iavf_debug(hw, IAVF_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
887 iavf_debug_aq(hw, IAVF_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
888 hw->aq.arq_buf_size);
889
890 /* Restore the original datalen and buffer address in the desc,
891 * FW updates datalen to indicate the event message
892 * size
893 */
894 bi = &hw->aq.arq.r.arq_bi[ntc];
895 memset((void *)desc, 0, sizeof(struct iavf_aq_desc));
896
897 desc->flags = cpu_to_le16(IAVF_AQ_FLAG_BUF);
898 if (hw->aq.arq_buf_size > IAVF_AQ_LARGE_BUF)
899 desc->flags |= cpu_to_le16(IAVF_AQ_FLAG_LB);
900 desc->datalen = cpu_to_le16((u16)bi->size);
901 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
902 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
903
904 /* set tail = the last cleaned desc index. */
905 wr32(hw, IAVF_VF_ARQT1, ntc);
906 /* ntc is updated to tail + 1 */
907 ntc++;
908 if (ntc == hw->aq.num_arq_entries)
909 ntc = 0;
910 hw->aq.arq.next_to_clean = ntc;
911 hw->aq.arq.next_to_use = ntu;
912
913 clean_arq_element_out:
914 /* Set pending if needed, unlock and return */
915 if (pending)
916 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
917
918 clean_arq_element_err:
919 mutex_unlock(&hw->aq.arq_mutex);
920
921 return ret_code;
922 }
923