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1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2016 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27#include "i40e_status.h"
28#include "i40e_type.h"
29#include "i40e_register.h"
30#include "i40e_adminq.h"
31#include "i40e_prototype.h"
32
33/**
34 * i40e_is_nvm_update_op - return true if this is an NVM update operation
35 * @desc: API request descriptor
36 **/
37static inline bool i40e_is_nvm_update_op(struct i40e_aq_desc *desc)
38{
39 return (desc->opcode == i40e_aqc_opc_nvm_erase) ||
40 (desc->opcode == i40e_aqc_opc_nvm_update);
41}
42
43/**
44 * i40e_adminq_init_regs - Initialize AdminQ registers
45 * @hw: pointer to the hardware structure
46 *
47 * This assumes the alloc_asq and alloc_arq functions have already been called
48 **/
49static void i40e_adminq_init_regs(struct i40e_hw *hw)
50{
51 /* set head and tail registers in our local struct */
52 if (i40e_is_vf(hw)) {
53 hw->aq.asq.tail = I40E_VF_ATQT1;
54 hw->aq.asq.head = I40E_VF_ATQH1;
55 hw->aq.asq.len = I40E_VF_ATQLEN1;
56 hw->aq.asq.bal = I40E_VF_ATQBAL1;
57 hw->aq.asq.bah = I40E_VF_ATQBAH1;
58 hw->aq.arq.tail = I40E_VF_ARQT1;
59 hw->aq.arq.head = I40E_VF_ARQH1;
60 hw->aq.arq.len = I40E_VF_ARQLEN1;
61 hw->aq.arq.bal = I40E_VF_ARQBAL1;
62 hw->aq.arq.bah = I40E_VF_ARQBAH1;
63 }
64}
65
66/**
67 * i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
68 * @hw: pointer to the hardware structure
69 **/
70static i40e_status i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
71{
72 i40e_status ret_code;
73
74 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
75 i40e_mem_atq_ring,
76 (hw->aq.num_asq_entries *
77 sizeof(struct i40e_aq_desc)),
78 I40E_ADMINQ_DESC_ALIGNMENT);
79 if (ret_code)
80 return ret_code;
81
82 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
83 (hw->aq.num_asq_entries *
84 sizeof(struct i40e_asq_cmd_details)));
85 if (ret_code) {
86 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
87 return ret_code;
88 }
89
90 return ret_code;
91}
92
93/**
94 * i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
95 * @hw: pointer to the hardware structure
96 **/
97static i40e_status i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
98{
99 i40e_status ret_code;
100
101 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
102 i40e_mem_arq_ring,
103 (hw->aq.num_arq_entries *
104 sizeof(struct i40e_aq_desc)),
105 I40E_ADMINQ_DESC_ALIGNMENT);
106
107 return ret_code;
108}
109
110/**
111 * i40e_free_adminq_asq - Free Admin Queue send rings
112 * @hw: pointer to the hardware structure
113 *
114 * This assumes the posted send buffers have already been cleaned
115 * and de-allocated
116 **/
117static void i40e_free_adminq_asq(struct i40e_hw *hw)
118{
119 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
120}
121
122/**
123 * i40e_free_adminq_arq - Free Admin Queue receive rings
124 * @hw: pointer to the hardware structure
125 *
126 * This assumes the posted receive buffers have already been cleaned
127 * and de-allocated
128 **/
129static void i40e_free_adminq_arq(struct i40e_hw *hw)
130{
131 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
132}
133
134/**
135 * i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
136 * @hw: pointer to the hardware structure
137 **/
138static i40e_status i40e_alloc_arq_bufs(struct i40e_hw *hw)
139{
140 i40e_status ret_code;
141 struct i40e_aq_desc *desc;
142 struct i40e_dma_mem *bi;
143 int i;
144
145 /* We'll be allocating the buffer info memory first, then we can
146 * allocate the mapped buffers for the event processing
147 */
148
149 /* buffer_info structures do not need alignment */
150 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
151 (hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
152 if (ret_code)
153 goto alloc_arq_bufs;
154 hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
155
156 /* allocate the mapped buffers */
157 for (i = 0; i < hw->aq.num_arq_entries; i++) {
158 bi = &hw->aq.arq.r.arq_bi[i];
159 ret_code = i40e_allocate_dma_mem(hw, bi,
160 i40e_mem_arq_buf,
161 hw->aq.arq_buf_size,
162 I40E_ADMINQ_DESC_ALIGNMENT);
163 if (ret_code)
164 goto unwind_alloc_arq_bufs;
165
166 /* now configure the descriptors for use */
167 desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
168
169 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
170 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
171 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
172 desc->opcode = 0;
173 /* This is in accordance with Admin queue design, there is no
174 * register for buffer size configuration
175 */
176 desc->datalen = cpu_to_le16((u16)bi->size);
177 desc->retval = 0;
178 desc->cookie_high = 0;
179 desc->cookie_low = 0;
180 desc->params.external.addr_high =
181 cpu_to_le32(upper_32_bits(bi->pa));
182 desc->params.external.addr_low =
183 cpu_to_le32(lower_32_bits(bi->pa));
184 desc->params.external.param0 = 0;
185 desc->params.external.param1 = 0;
186 }
187
188alloc_arq_bufs:
189 return ret_code;
190
191unwind_alloc_arq_bufs:
192 /* don't try to free the one that failed... */
193 i--;
194 for (; i >= 0; i--)
195 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
196 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
197
198 return ret_code;
199}
200
201/**
202 * i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
203 * @hw: pointer to the hardware structure
204 **/
205static i40e_status i40e_alloc_asq_bufs(struct i40e_hw *hw)
206{
207 i40e_status ret_code;
208 struct i40e_dma_mem *bi;
209 int i;
210
211 /* No mapped memory needed yet, just the buffer info structures */
212 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
213 (hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
214 if (ret_code)
215 goto alloc_asq_bufs;
216 hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
217
218 /* allocate the mapped buffers */
219 for (i = 0; i < hw->aq.num_asq_entries; i++) {
220 bi = &hw->aq.asq.r.asq_bi[i];
221 ret_code = i40e_allocate_dma_mem(hw, bi,
222 i40e_mem_asq_buf,
223 hw->aq.asq_buf_size,
224 I40E_ADMINQ_DESC_ALIGNMENT);
225 if (ret_code)
226 goto unwind_alloc_asq_bufs;
227 }
228alloc_asq_bufs:
229 return ret_code;
230
231unwind_alloc_asq_bufs:
232 /* don't try to free the one that failed... */
233 i--;
234 for (; i >= 0; i--)
235 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
236 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
237
238 return ret_code;
239}
240
241/**
242 * i40e_free_arq_bufs - Free receive queue buffer info elements
243 * @hw: pointer to the hardware structure
244 **/
245static void i40e_free_arq_bufs(struct i40e_hw *hw)
246{
247 int i;
248
249 /* free descriptors */
250 for (i = 0; i < hw->aq.num_arq_entries; i++)
251 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
252
253 /* free the descriptor memory */
254 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
255
256 /* free the dma header */
257 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
258}
259
260/**
261 * i40e_free_asq_bufs - Free send queue buffer info elements
262 * @hw: pointer to the hardware structure
263 **/
264static void i40e_free_asq_bufs(struct i40e_hw *hw)
265{
266 int i;
267
268 /* only unmap if the address is non-NULL */
269 for (i = 0; i < hw->aq.num_asq_entries; i++)
270 if (hw->aq.asq.r.asq_bi[i].pa)
271 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
272
273 /* free the buffer info list */
274 i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
275
276 /* free the descriptor memory */
277 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
278
279 /* free the dma header */
280 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
281}
282
283/**
284 * i40e_config_asq_regs - configure ASQ registers
285 * @hw: pointer to the hardware structure
286 *
287 * Configure base address and length registers for the transmit queue
288 **/
289static i40e_status i40e_config_asq_regs(struct i40e_hw *hw)
290{
291 i40e_status ret_code = 0;
292 u32 reg = 0;
293
294 /* Clear Head and Tail */
295 wr32(hw, hw->aq.asq.head, 0);
296 wr32(hw, hw->aq.asq.tail, 0);
297
298 /* set starting point */
299 wr32(hw, hw->aq.asq.len, (hw->aq.num_asq_entries |
300 I40E_VF_ATQLEN1_ATQENABLE_MASK));
301 wr32(hw, hw->aq.asq.bal, lower_32_bits(hw->aq.asq.desc_buf.pa));
302 wr32(hw, hw->aq.asq.bah, upper_32_bits(hw->aq.asq.desc_buf.pa));
303
304 /* Check one register to verify that config was applied */
305 reg = rd32(hw, hw->aq.asq.bal);
306 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
307 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
308
309 return ret_code;
310}
311
312/**
313 * i40e_config_arq_regs - ARQ register configuration
314 * @hw: pointer to the hardware structure
315 *
316 * Configure base address and length registers for the receive (event queue)
317 **/
318static i40e_status i40e_config_arq_regs(struct i40e_hw *hw)
319{
320 i40e_status ret_code = 0;
321 u32 reg = 0;
322
323 /* Clear Head and Tail */
324 wr32(hw, hw->aq.arq.head, 0);
325 wr32(hw, hw->aq.arq.tail, 0);
326
327 /* set starting point */
328 wr32(hw, hw->aq.arq.len, (hw->aq.num_arq_entries |
329 I40E_VF_ARQLEN1_ARQENABLE_MASK));
330 wr32(hw, hw->aq.arq.bal, lower_32_bits(hw->aq.arq.desc_buf.pa));
331 wr32(hw, hw->aq.arq.bah, upper_32_bits(hw->aq.arq.desc_buf.pa));
332
333 /* Update tail in the HW to post pre-allocated buffers */
334 wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
335
336 /* Check one register to verify that config was applied */
337 reg = rd32(hw, hw->aq.arq.bal);
338 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
339 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
340
341 return ret_code;
342}
343
344/**
345 * i40e_init_asq - main initialization routine for ASQ
346 * @hw: pointer to the hardware structure
347 *
348 * This is the main initialization routine for the Admin Send Queue
349 * Prior to calling this function, drivers *MUST* set the following fields
350 * in the hw->aq structure:
351 * - hw->aq.num_asq_entries
352 * - hw->aq.arq_buf_size
353 *
354 * Do *NOT* hold the lock when calling this as the memory allocation routines
355 * called are not going to be atomic context safe
356 **/
357static i40e_status i40e_init_asq(struct i40e_hw *hw)
358{
359 i40e_status ret_code = 0;
360
361 if (hw->aq.asq.count > 0) {
362 /* queue already initialized */
363 ret_code = I40E_ERR_NOT_READY;
364 goto init_adminq_exit;
365 }
366
367 /* verify input for valid configuration */
368 if ((hw->aq.num_asq_entries == 0) ||
369 (hw->aq.asq_buf_size == 0)) {
370 ret_code = I40E_ERR_CONFIG;
371 goto init_adminq_exit;
372 }
373
374 hw->aq.asq.next_to_use = 0;
375 hw->aq.asq.next_to_clean = 0;
376
377 /* allocate the ring memory */
378 ret_code = i40e_alloc_adminq_asq_ring(hw);
379 if (ret_code)
380 goto init_adminq_exit;
381
382 /* allocate buffers in the rings */
383 ret_code = i40e_alloc_asq_bufs(hw);
384 if (ret_code)
385 goto init_adminq_free_rings;
386
387 /* initialize base registers */
388 ret_code = i40e_config_asq_regs(hw);
389 if (ret_code)
390 goto init_adminq_free_rings;
391
392 /* success! */
393 hw->aq.asq.count = hw->aq.num_asq_entries;
394 goto init_adminq_exit;
395
396init_adminq_free_rings:
397 i40e_free_adminq_asq(hw);
398
399init_adminq_exit:
400 return ret_code;
401}
402
403/**
404 * i40e_init_arq - initialize ARQ
405 * @hw: pointer to the hardware structure
406 *
407 * The main initialization routine for the Admin Receive (Event) Queue.
408 * Prior to calling this function, drivers *MUST* set the following fields
409 * in the hw->aq structure:
410 * - hw->aq.num_asq_entries
411 * - hw->aq.arq_buf_size
412 *
413 * Do *NOT* hold the lock when calling this as the memory allocation routines
414 * called are not going to be atomic context safe
415 **/
416static i40e_status i40e_init_arq(struct i40e_hw *hw)
417{
418 i40e_status ret_code = 0;
419
420 if (hw->aq.arq.count > 0) {
421 /* queue already initialized */
422 ret_code = I40E_ERR_NOT_READY;
423 goto init_adminq_exit;
424 }
425
426 /* verify input for valid configuration */
427 if ((hw->aq.num_arq_entries == 0) ||
428 (hw->aq.arq_buf_size == 0)) {
429 ret_code = I40E_ERR_CONFIG;
430 goto init_adminq_exit;
431 }
432
433 hw->aq.arq.next_to_use = 0;
434 hw->aq.arq.next_to_clean = 0;
435
436 /* allocate the ring memory */
437 ret_code = i40e_alloc_adminq_arq_ring(hw);
438 if (ret_code)
439 goto init_adminq_exit;
440
441 /* allocate buffers in the rings */
442 ret_code = i40e_alloc_arq_bufs(hw);
443 if (ret_code)
444 goto init_adminq_free_rings;
445
446 /* initialize base registers */
447 ret_code = i40e_config_arq_regs(hw);
448 if (ret_code)
449 goto init_adminq_free_rings;
450
451 /* success! */
452 hw->aq.arq.count = hw->aq.num_arq_entries;
453 goto init_adminq_exit;
454
455init_adminq_free_rings:
456 i40e_free_adminq_arq(hw);
457
458init_adminq_exit:
459 return ret_code;
460}
461
462/**
463 * i40e_shutdown_asq - shutdown the ASQ
464 * @hw: pointer to the hardware structure
465 *
466 * The main shutdown routine for the Admin Send Queue
467 **/
468static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
469{
470 i40e_status ret_code = 0;
471
472 mutex_lock(&hw->aq.asq_mutex);
473
474 if (hw->aq.asq.count == 0) {
475 ret_code = I40E_ERR_NOT_READY;
476 goto shutdown_asq_out;
477 }
478
479 /* Stop firmware AdminQ processing */
480 wr32(hw, hw->aq.asq.head, 0);
481 wr32(hw, hw->aq.asq.tail, 0);
482 wr32(hw, hw->aq.asq.len, 0);
483 wr32(hw, hw->aq.asq.bal, 0);
484 wr32(hw, hw->aq.asq.bah, 0);
485
486 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
487
488 /* free ring buffers */
489 i40e_free_asq_bufs(hw);
490
491shutdown_asq_out:
492 mutex_unlock(&hw->aq.asq_mutex);
493 return ret_code;
494}
495
496/**
497 * i40e_shutdown_arq - shutdown ARQ
498 * @hw: pointer to the hardware structure
499 *
500 * The main shutdown routine for the Admin Receive Queue
501 **/
502static i40e_status i40e_shutdown_arq(struct i40e_hw *hw)
503{
504 i40e_status ret_code = 0;
505
506 mutex_lock(&hw->aq.arq_mutex);
507
508 if (hw->aq.arq.count == 0) {
509 ret_code = I40E_ERR_NOT_READY;
510 goto shutdown_arq_out;
511 }
512
513 /* Stop firmware AdminQ processing */
514 wr32(hw, hw->aq.arq.head, 0);
515 wr32(hw, hw->aq.arq.tail, 0);
516 wr32(hw, hw->aq.arq.len, 0);
517 wr32(hw, hw->aq.arq.bal, 0);
518 wr32(hw, hw->aq.arq.bah, 0);
519
520 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
521
522 /* free ring buffers */
523 i40e_free_arq_bufs(hw);
524
525shutdown_arq_out:
526 mutex_unlock(&hw->aq.arq_mutex);
527 return ret_code;
528}
529
530/**
531 * i40evf_init_adminq - main initialization routine for Admin Queue
532 * @hw: pointer to the hardware structure
533 *
534 * Prior to calling this function, drivers *MUST* set the following fields
535 * in the hw->aq structure:
536 * - hw->aq.num_asq_entries
537 * - hw->aq.num_arq_entries
538 * - hw->aq.arq_buf_size
539 * - hw->aq.asq_buf_size
540 **/
541i40e_status i40evf_init_adminq(struct i40e_hw *hw)
542{
543 i40e_status ret_code;
544
545 /* verify input for valid configuration */
546 if ((hw->aq.num_arq_entries == 0) ||
547 (hw->aq.num_asq_entries == 0) ||
548 (hw->aq.arq_buf_size == 0) ||
549 (hw->aq.asq_buf_size == 0)) {
550 ret_code = I40E_ERR_CONFIG;
551 goto init_adminq_exit;
552 }
553
554 /* Set up register offsets */
555 i40e_adminq_init_regs(hw);
556
557 /* setup ASQ command write back timeout */
558 hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
559
560 /* allocate the ASQ */
561 ret_code = i40e_init_asq(hw);
562 if (ret_code)
563 goto init_adminq_destroy_locks;
564
565 /* allocate the ARQ */
566 ret_code = i40e_init_arq(hw);
567 if (ret_code)
568 goto init_adminq_free_asq;
569
570 /* success! */
571 goto init_adminq_exit;
572
573init_adminq_free_asq:
574 i40e_shutdown_asq(hw);
575init_adminq_destroy_locks:
576
577init_adminq_exit:
578 return ret_code;
579}
580
581/**
582 * i40evf_shutdown_adminq - shutdown routine for the Admin Queue
583 * @hw: pointer to the hardware structure
584 **/
585i40e_status i40evf_shutdown_adminq(struct i40e_hw *hw)
586{
587 i40e_status ret_code = 0;
588
589 if (i40evf_check_asq_alive(hw))
590 i40evf_aq_queue_shutdown(hw, true);
591
592 i40e_shutdown_asq(hw);
593 i40e_shutdown_arq(hw);
594
595 if (hw->nvm_buff.va)
596 i40e_free_virt_mem(hw, &hw->nvm_buff);
597
598 return ret_code;
599}
600
601/**
602 * i40e_clean_asq - cleans Admin send queue
603 * @hw: pointer to the hardware structure
604 *
605 * returns the number of free desc
606 **/
607static u16 i40e_clean_asq(struct i40e_hw *hw)
608{
609 struct i40e_adminq_ring *asq = &(hw->aq.asq);
610 struct i40e_asq_cmd_details *details;
611 u16 ntc = asq->next_to_clean;
612 struct i40e_aq_desc desc_cb;
613 struct i40e_aq_desc *desc;
614
615 desc = I40E_ADMINQ_DESC(*asq, ntc);
616 details = I40E_ADMINQ_DETAILS(*asq, ntc);
617 while (rd32(hw, hw->aq.asq.head) != ntc) {
618 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
619 "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
620
621 if (details->callback) {
622 I40E_ADMINQ_CALLBACK cb_func =
623 (I40E_ADMINQ_CALLBACK)details->callback;
624 desc_cb = *desc;
625 cb_func(hw, &desc_cb);
626 }
627 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
628 memset((void *)details, 0,
629 sizeof(struct i40e_asq_cmd_details));
630 ntc++;
631 if (ntc == asq->count)
632 ntc = 0;
633 desc = I40E_ADMINQ_DESC(*asq, ntc);
634 details = I40E_ADMINQ_DETAILS(*asq, ntc);
635 }
636
637 asq->next_to_clean = ntc;
638
639 return I40E_DESC_UNUSED(asq);
640}
641
642/**
643 * i40evf_asq_done - check if FW has processed the Admin Send Queue
644 * @hw: pointer to the hw struct
645 *
646 * Returns true if the firmware has processed all descriptors on the
647 * admin send queue. Returns false if there are still requests pending.
648 **/
649bool i40evf_asq_done(struct i40e_hw *hw)
650{
651 /* AQ designers suggest use of head for better
652 * timing reliability than DD bit
653 */
654 return rd32(hw, hw->aq.asq.head) == hw->aq.asq.next_to_use;
655
656}
657
658/**
659 * i40evf_asq_send_command - send command to Admin Queue
660 * @hw: pointer to the hw struct
661 * @desc: prefilled descriptor describing the command (non DMA mem)
662 * @buff: buffer to use for indirect commands
663 * @buff_size: size of buffer for indirect commands
664 * @cmd_details: pointer to command details structure
665 *
666 * This is the main send command driver routine for the Admin Queue send
667 * queue. It runs the queue, cleans the queue, etc
668 **/
669i40e_status i40evf_asq_send_command(struct i40e_hw *hw,
670 struct i40e_aq_desc *desc,
671 void *buff, /* can be NULL */
672 u16 buff_size,
673 struct i40e_asq_cmd_details *cmd_details)
674{
675 i40e_status status = 0;
676 struct i40e_dma_mem *dma_buff = NULL;
677 struct i40e_asq_cmd_details *details;
678 struct i40e_aq_desc *desc_on_ring;
679 bool cmd_completed = false;
680 u16 retval = 0;
681 u32 val = 0;
682
683 mutex_lock(&hw->aq.asq_mutex);
684
685 if (hw->aq.asq.count == 0) {
686 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
687 "AQTX: Admin queue not initialized.\n");
688 status = I40E_ERR_QUEUE_EMPTY;
689 goto asq_send_command_error;
690 }
691
692 hw->aq.asq_last_status = I40E_AQ_RC_OK;
693
694 val = rd32(hw, hw->aq.asq.head);
695 if (val >= hw->aq.num_asq_entries) {
696 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
697 "AQTX: head overrun at %d\n", val);
698 status = I40E_ERR_QUEUE_EMPTY;
699 goto asq_send_command_error;
700 }
701
702 details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
703 if (cmd_details) {
704 *details = *cmd_details;
705
706 /* If the cmd_details are defined copy the cookie. The
707 * cpu_to_le32 is not needed here because the data is ignored
708 * by the FW, only used by the driver
709 */
710 if (details->cookie) {
711 desc->cookie_high =
712 cpu_to_le32(upper_32_bits(details->cookie));
713 desc->cookie_low =
714 cpu_to_le32(lower_32_bits(details->cookie));
715 }
716 } else {
717 memset(details, 0, sizeof(struct i40e_asq_cmd_details));
718 }
719
720 /* clear requested flags and then set additional flags if defined */
721 desc->flags &= ~cpu_to_le16(details->flags_dis);
722 desc->flags |= cpu_to_le16(details->flags_ena);
723
724 if (buff_size > hw->aq.asq_buf_size) {
725 i40e_debug(hw,
726 I40E_DEBUG_AQ_MESSAGE,
727 "AQTX: Invalid buffer size: %d.\n",
728 buff_size);
729 status = I40E_ERR_INVALID_SIZE;
730 goto asq_send_command_error;
731 }
732
733 if (details->postpone && !details->async) {
734 i40e_debug(hw,
735 I40E_DEBUG_AQ_MESSAGE,
736 "AQTX: Async flag not set along with postpone flag");
737 status = I40E_ERR_PARAM;
738 goto asq_send_command_error;
739 }
740
741 /* call clean and check queue available function to reclaim the
742 * descriptors that were processed by FW, the function returns the
743 * number of desc available
744 */
745 /* the clean function called here could be called in a separate thread
746 * in case of asynchronous completions
747 */
748 if (i40e_clean_asq(hw) == 0) {
749 i40e_debug(hw,
750 I40E_DEBUG_AQ_MESSAGE,
751 "AQTX: Error queue is full.\n");
752 status = I40E_ERR_ADMIN_QUEUE_FULL;
753 goto asq_send_command_error;
754 }
755
756 /* initialize the temp desc pointer with the right desc */
757 desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
758
759 /* if the desc is available copy the temp desc to the right place */
760 *desc_on_ring = *desc;
761
762 /* if buff is not NULL assume indirect command */
763 if (buff != NULL) {
764 dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
765 /* copy the user buff into the respective DMA buff */
766 memcpy(dma_buff->va, buff, buff_size);
767 desc_on_ring->datalen = cpu_to_le16(buff_size);
768
769 /* Update the address values in the desc with the pa value
770 * for respective buffer
771 */
772 desc_on_ring->params.external.addr_high =
773 cpu_to_le32(upper_32_bits(dma_buff->pa));
774 desc_on_ring->params.external.addr_low =
775 cpu_to_le32(lower_32_bits(dma_buff->pa));
776 }
777
778 /* bump the tail */
779 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQTX: desc and buffer:\n");
780 i40evf_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
781 buff, buff_size);
782 (hw->aq.asq.next_to_use)++;
783 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
784 hw->aq.asq.next_to_use = 0;
785 if (!details->postpone)
786 wr32(hw, hw->aq.asq.tail, hw->aq.asq.next_to_use);
787
788 /* if cmd_details are not defined or async flag is not set,
789 * we need to wait for desc write back
790 */
791 if (!details->async && !details->postpone) {
792 u32 total_delay = 0;
793
794 do {
795 /* AQ designers suggest use of head for better
796 * timing reliability than DD bit
797 */
798 if (i40evf_asq_done(hw))
799 break;
800 usleep_range(1000, 2000);
801 total_delay++;
802 } while (total_delay < hw->aq.asq_cmd_timeout);
803 }
804
805 /* if ready, copy the desc back to temp */
806 if (i40evf_asq_done(hw)) {
807 *desc = *desc_on_ring;
808 if (buff != NULL)
809 memcpy(buff, dma_buff->va, buff_size);
810 retval = le16_to_cpu(desc->retval);
811 if (retval != 0) {
812 i40e_debug(hw,
813 I40E_DEBUG_AQ_MESSAGE,
814 "AQTX: Command completed with error 0x%X.\n",
815 retval);
816
817 /* strip off FW internal code */
818 retval &= 0xff;
819 }
820 cmd_completed = true;
821 if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
822 status = 0;
823 else
824 status = I40E_ERR_ADMIN_QUEUE_ERROR;
825 hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
826 }
827
828 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
829 "AQTX: desc and buffer writeback:\n");
830 i40evf_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff,
831 buff_size);
832
833 /* save writeback aq if requested */
834 if (details->wb_desc)
835 *details->wb_desc = *desc_on_ring;
836
837 /* update the error if time out occurred */
838 if ((!cmd_completed) &&
839 (!details->async && !details->postpone)) {
840 i40e_debug(hw,
841 I40E_DEBUG_AQ_MESSAGE,
842 "AQTX: Writeback timeout.\n");
843 status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
844 }
845
846asq_send_command_error:
847 mutex_unlock(&hw->aq.asq_mutex);
848 return status;
849}
850
851/**
852 * i40evf_fill_default_direct_cmd_desc - AQ descriptor helper function
853 * @desc: pointer to the temp descriptor (non DMA mem)
854 * @opcode: the opcode can be used to decide which flags to turn off or on
855 *
856 * Fill the desc with default values
857 **/
858void i40evf_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
859 u16 opcode)
860{
861 /* zero out the desc */
862 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
863 desc->opcode = cpu_to_le16(opcode);
864 desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
865}
866
867/**
868 * i40evf_clean_arq_element
869 * @hw: pointer to the hw struct
870 * @e: event info from the receive descriptor, includes any buffers
871 * @pending: number of events that could be left to process
872 *
873 * This function cleans one Admin Receive Queue element and returns
874 * the contents through e. It can also return how many events are
875 * left to process through 'pending'
876 **/
877i40e_status i40evf_clean_arq_element(struct i40e_hw *hw,
878 struct i40e_arq_event_info *e,
879 u16 *pending)
880{
881 i40e_status ret_code = 0;
882 u16 ntc = hw->aq.arq.next_to_clean;
883 struct i40e_aq_desc *desc;
884 struct i40e_dma_mem *bi;
885 u16 desc_idx;
886 u16 datalen;
887 u16 flags;
888 u16 ntu;
889
890 /* pre-clean the event info */
891 memset(&e->desc, 0, sizeof(e->desc));
892
893 /* take the lock before we start messing with the ring */
894 mutex_lock(&hw->aq.arq_mutex);
895
896 if (hw->aq.arq.count == 0) {
897 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
898 "AQRX: Admin queue not initialized.\n");
899 ret_code = I40E_ERR_QUEUE_EMPTY;
900 goto clean_arq_element_err;
901 }
902
903 /* set next_to_use to head */
904 ntu = (rd32(hw, hw->aq.arq.head) & I40E_VF_ARQH1_ARQH_MASK);
905 if (ntu == ntc) {
906 /* nothing to do - shouldn't need to update ring's values */
907 ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
908 goto clean_arq_element_out;
909 }
910
911 /* now clean the next descriptor */
912 desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
913 desc_idx = ntc;
914
915 flags = le16_to_cpu(desc->flags);
916 if (flags & I40E_AQ_FLAG_ERR) {
917 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
918 hw->aq.arq_last_status =
919 (enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
920 i40e_debug(hw,
921 I40E_DEBUG_AQ_MESSAGE,
922 "AQRX: Event received with error 0x%X.\n",
923 hw->aq.arq_last_status);
924 }
925
926 e->desc = *desc;
927 datalen = le16_to_cpu(desc->datalen);
928 e->msg_len = min(datalen, e->buf_len);
929 if (e->msg_buf != NULL && (e->msg_len != 0))
930 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
931 e->msg_len);
932
933 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
934 i40evf_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
935 hw->aq.arq_buf_size);
936
937 /* Restore the original datalen and buffer address in the desc,
938 * FW updates datalen to indicate the event message
939 * size
940 */
941 bi = &hw->aq.arq.r.arq_bi[ntc];
942 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
943
944 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
945 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
946 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
947 desc->datalen = cpu_to_le16((u16)bi->size);
948 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
949 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
950
951 /* set tail = the last cleaned desc index. */
952 wr32(hw, hw->aq.arq.tail, ntc);
953 /* ntc is updated to tail + 1 */
954 ntc++;
955 if (ntc == hw->aq.num_arq_entries)
956 ntc = 0;
957 hw->aq.arq.next_to_clean = ntc;
958 hw->aq.arq.next_to_use = ntu;
959
960clean_arq_element_out:
961 /* Set pending if needed, unlock and return */
962 if (pending != NULL)
963 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
964
965clean_arq_element_err:
966 mutex_unlock(&hw->aq.arq_mutex);
967
968 return ret_code;
969}
970
971void i40evf_resume_aq(struct i40e_hw *hw)
972{
973 /* Registers are reset after PF reset */
974 hw->aq.asq.next_to_use = 0;
975 hw->aq.asq.next_to_clean = 0;
976
977 i40e_config_asq_regs(hw);
978
979 hw->aq.arq.next_to_use = 0;
980 hw->aq.arq.next_to_clean = 0;
981
982 i40e_config_arq_regs(hw);
983}