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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4#include <linux/delay.h>
5#include "i40e_alloc.h"
6#include "i40e_register.h"
7#include "i40e_prototype.h"
8
9static void i40e_resume_aq(struct i40e_hw *hw);
10
11/**
12 * i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
13 * @hw: pointer to the hardware structure
14 **/
15static int i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
16{
17 int ret_code;
18
19 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
20 (hw->aq.num_asq_entries *
21 sizeof(struct i40e_aq_desc)),
22 I40E_ADMINQ_DESC_ALIGNMENT);
23 if (ret_code)
24 return ret_code;
25
26 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
27 (hw->aq.num_asq_entries *
28 sizeof(struct i40e_asq_cmd_details)));
29 if (ret_code) {
30 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
31 return ret_code;
32 }
33
34 return ret_code;
35}
36
37/**
38 * i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
39 * @hw: pointer to the hardware structure
40 **/
41static int i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
42{
43 int ret_code;
44
45 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
46 (hw->aq.num_arq_entries *
47 sizeof(struct i40e_aq_desc)),
48 I40E_ADMINQ_DESC_ALIGNMENT);
49
50 return ret_code;
51}
52
53/**
54 * i40e_free_adminq_asq - Free Admin Queue send rings
55 * @hw: pointer to the hardware structure
56 *
57 * This assumes the posted send buffers have already been cleaned
58 * and de-allocated
59 **/
60static void i40e_free_adminq_asq(struct i40e_hw *hw)
61{
62 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
63}
64
65/**
66 * i40e_free_adminq_arq - Free Admin Queue receive rings
67 * @hw: pointer to the hardware structure
68 *
69 * This assumes the posted receive buffers have already been cleaned
70 * and de-allocated
71 **/
72static void i40e_free_adminq_arq(struct i40e_hw *hw)
73{
74 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
75}
76
77/**
78 * i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
79 * @hw: pointer to the hardware structure
80 **/
81static int i40e_alloc_arq_bufs(struct i40e_hw *hw)
82{
83 struct i40e_aq_desc *desc;
84 struct i40e_dma_mem *bi;
85 int ret_code;
86 int i;
87
88 /* We'll be allocating the buffer info memory first, then we can
89 * allocate the mapped buffers for the event processing
90 */
91
92 /* buffer_info structures do not need alignment */
93 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
94 (hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
95 if (ret_code)
96 goto alloc_arq_bufs;
97 hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
98
99 /* allocate the mapped buffers */
100 for (i = 0; i < hw->aq.num_arq_entries; i++) {
101 bi = &hw->aq.arq.r.arq_bi[i];
102 ret_code = i40e_allocate_dma_mem(hw, bi,
103 hw->aq.arq_buf_size,
104 I40E_ADMINQ_DESC_ALIGNMENT);
105 if (ret_code)
106 goto unwind_alloc_arq_bufs;
107
108 /* now configure the descriptors for use */
109 desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
110
111 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
112 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
113 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
114 desc->opcode = 0;
115 /* This is in accordance with Admin queue design, there is no
116 * register for buffer size configuration
117 */
118 desc->datalen = cpu_to_le16((u16)bi->size);
119 desc->retval = 0;
120 desc->cookie_high = 0;
121 desc->cookie_low = 0;
122 desc->params.external.addr_high =
123 cpu_to_le32(upper_32_bits(bi->pa));
124 desc->params.external.addr_low =
125 cpu_to_le32(lower_32_bits(bi->pa));
126 desc->params.external.param0 = 0;
127 desc->params.external.param1 = 0;
128 }
129
130alloc_arq_bufs:
131 return ret_code;
132
133unwind_alloc_arq_bufs:
134 /* don't try to free the one that failed... */
135 i--;
136 for (; i >= 0; i--)
137 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
138 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
139
140 return ret_code;
141}
142
143/**
144 * i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
145 * @hw: pointer to the hardware structure
146 **/
147static int i40e_alloc_asq_bufs(struct i40e_hw *hw)
148{
149 struct i40e_dma_mem *bi;
150 int ret_code;
151 int i;
152
153 /* No mapped memory needed yet, just the buffer info structures */
154 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
155 (hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
156 if (ret_code)
157 goto alloc_asq_bufs;
158 hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
159
160 /* allocate the mapped buffers */
161 for (i = 0; i < hw->aq.num_asq_entries; i++) {
162 bi = &hw->aq.asq.r.asq_bi[i];
163 ret_code = i40e_allocate_dma_mem(hw, bi,
164 hw->aq.asq_buf_size,
165 I40E_ADMINQ_DESC_ALIGNMENT);
166 if (ret_code)
167 goto unwind_alloc_asq_bufs;
168 }
169alloc_asq_bufs:
170 return ret_code;
171
172unwind_alloc_asq_bufs:
173 /* don't try to free the one that failed... */
174 i--;
175 for (; i >= 0; i--)
176 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
177 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
178
179 return ret_code;
180}
181
182/**
183 * i40e_free_arq_bufs - Free receive queue buffer info elements
184 * @hw: pointer to the hardware structure
185 **/
186static void i40e_free_arq_bufs(struct i40e_hw *hw)
187{
188 int i;
189
190 /* free descriptors */
191 for (i = 0; i < hw->aq.num_arq_entries; i++)
192 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
193
194 /* free the descriptor memory */
195 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
196
197 /* free the dma header */
198 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
199}
200
201/**
202 * i40e_free_asq_bufs - Free send queue buffer info elements
203 * @hw: pointer to the hardware structure
204 **/
205static void i40e_free_asq_bufs(struct i40e_hw *hw)
206{
207 int i;
208
209 /* only unmap if the address is non-NULL */
210 for (i = 0; i < hw->aq.num_asq_entries; i++)
211 if (hw->aq.asq.r.asq_bi[i].pa)
212 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
213
214 /* free the buffer info list */
215 i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
216
217 /* free the descriptor memory */
218 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
219
220 /* free the dma header */
221 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
222}
223
224/**
225 * i40e_config_asq_regs - configure ASQ registers
226 * @hw: pointer to the hardware structure
227 *
228 * Configure base address and length registers for the transmit queue
229 **/
230static int i40e_config_asq_regs(struct i40e_hw *hw)
231{
232 int ret_code = 0;
233 u32 reg = 0;
234
235 /* Clear Head and Tail */
236 wr32(hw, I40E_PF_ATQH, 0);
237 wr32(hw, I40E_PF_ATQT, 0);
238
239 /* set starting point */
240 wr32(hw, I40E_PF_ATQLEN, (hw->aq.num_asq_entries |
241 I40E_PF_ATQLEN_ATQENABLE_MASK));
242 wr32(hw, I40E_PF_ATQBAL, lower_32_bits(hw->aq.asq.desc_buf.pa));
243 wr32(hw, I40E_PF_ATQBAH, upper_32_bits(hw->aq.asq.desc_buf.pa));
244
245 /* Check one register to verify that config was applied */
246 reg = rd32(hw, I40E_PF_ATQBAL);
247 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
248 ret_code = -EIO;
249
250 return ret_code;
251}
252
253/**
254 * i40e_config_arq_regs - ARQ register configuration
255 * @hw: pointer to the hardware structure
256 *
257 * Configure base address and length registers for the receive (event queue)
258 **/
259static int i40e_config_arq_regs(struct i40e_hw *hw)
260{
261 int ret_code = 0;
262 u32 reg = 0;
263
264 /* Clear Head and Tail */
265 wr32(hw, I40E_PF_ARQH, 0);
266 wr32(hw, I40E_PF_ARQT, 0);
267
268 /* set starting point */
269 wr32(hw, I40E_PF_ARQLEN, (hw->aq.num_arq_entries |
270 I40E_PF_ARQLEN_ARQENABLE_MASK));
271 wr32(hw, I40E_PF_ARQBAL, lower_32_bits(hw->aq.arq.desc_buf.pa));
272 wr32(hw, I40E_PF_ARQBAH, upper_32_bits(hw->aq.arq.desc_buf.pa));
273
274 /* Update tail in the HW to post pre-allocated buffers */
275 wr32(hw, I40E_PF_ARQT, hw->aq.num_arq_entries - 1);
276
277 /* Check one register to verify that config was applied */
278 reg = rd32(hw, I40E_PF_ARQBAL);
279 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
280 ret_code = -EIO;
281
282 return ret_code;
283}
284
285/**
286 * i40e_init_asq - main initialization routine for ASQ
287 * @hw: pointer to the hardware structure
288 *
289 * This is the main initialization routine for the Admin Send Queue
290 * Prior to calling this function, drivers *MUST* set the following fields
291 * in the hw->aq structure:
292 * - hw->aq.num_asq_entries
293 * - hw->aq.arq_buf_size
294 *
295 * Do *NOT* hold the lock when calling this as the memory allocation routines
296 * called are not going to be atomic context safe
297 **/
298static int i40e_init_asq(struct i40e_hw *hw)
299{
300 int ret_code = 0;
301
302 if (hw->aq.asq.count > 0) {
303 /* queue already initialized */
304 ret_code = -EBUSY;
305 goto init_adminq_exit;
306 }
307
308 /* verify input for valid configuration */
309 if ((hw->aq.num_asq_entries == 0) ||
310 (hw->aq.asq_buf_size == 0)) {
311 ret_code = -EIO;
312 goto init_adminq_exit;
313 }
314
315 hw->aq.asq.next_to_use = 0;
316 hw->aq.asq.next_to_clean = 0;
317
318 /* allocate the ring memory */
319 ret_code = i40e_alloc_adminq_asq_ring(hw);
320 if (ret_code)
321 goto init_adminq_exit;
322
323 /* allocate buffers in the rings */
324 ret_code = i40e_alloc_asq_bufs(hw);
325 if (ret_code)
326 goto init_adminq_free_rings;
327
328 /* initialize base registers */
329 ret_code = i40e_config_asq_regs(hw);
330 if (ret_code)
331 goto init_adminq_free_rings;
332
333 /* success! */
334 hw->aq.asq.count = hw->aq.num_asq_entries;
335 goto init_adminq_exit;
336
337init_adminq_free_rings:
338 i40e_free_adminq_asq(hw);
339
340init_adminq_exit:
341 return ret_code;
342}
343
344/**
345 * i40e_init_arq - initialize ARQ
346 * @hw: pointer to the hardware structure
347 *
348 * The main initialization routine for the Admin Receive (Event) 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 int i40e_init_arq(struct i40e_hw *hw)
358{
359 int ret_code = 0;
360
361 if (hw->aq.arq.count > 0) {
362 /* queue already initialized */
363 ret_code = -EBUSY;
364 goto init_adminq_exit;
365 }
366
367 /* verify input for valid configuration */
368 if ((hw->aq.num_arq_entries == 0) ||
369 (hw->aq.arq_buf_size == 0)) {
370 ret_code = -EIO;
371 goto init_adminq_exit;
372 }
373
374 hw->aq.arq.next_to_use = 0;
375 hw->aq.arq.next_to_clean = 0;
376
377 /* allocate the ring memory */
378 ret_code = i40e_alloc_adminq_arq_ring(hw);
379 if (ret_code)
380 goto init_adminq_exit;
381
382 /* allocate buffers in the rings */
383 ret_code = i40e_alloc_arq_bufs(hw);
384 if (ret_code)
385 goto init_adminq_free_rings;
386
387 /* initialize base registers */
388 ret_code = i40e_config_arq_regs(hw);
389 if (ret_code)
390 goto init_adminq_free_rings;
391
392 /* success! */
393 hw->aq.arq.count = hw->aq.num_arq_entries;
394 goto init_adminq_exit;
395
396init_adminq_free_rings:
397 i40e_free_adminq_arq(hw);
398
399init_adminq_exit:
400 return ret_code;
401}
402
403/**
404 * i40e_shutdown_asq - shutdown the ASQ
405 * @hw: pointer to the hardware structure
406 *
407 * The main shutdown routine for the Admin Send Queue
408 **/
409static int i40e_shutdown_asq(struct i40e_hw *hw)
410{
411 int ret_code = 0;
412
413 mutex_lock(&hw->aq.asq_mutex);
414
415 if (hw->aq.asq.count == 0) {
416 ret_code = -EBUSY;
417 goto shutdown_asq_out;
418 }
419
420 /* Stop firmware AdminQ processing */
421 wr32(hw, I40E_PF_ATQH, 0);
422 wr32(hw, I40E_PF_ATQT, 0);
423 wr32(hw, I40E_PF_ATQLEN, 0);
424 wr32(hw, I40E_PF_ATQBAL, 0);
425 wr32(hw, I40E_PF_ATQBAH, 0);
426
427 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
428
429 /* free ring buffers */
430 i40e_free_asq_bufs(hw);
431
432shutdown_asq_out:
433 mutex_unlock(&hw->aq.asq_mutex);
434 return ret_code;
435}
436
437/**
438 * i40e_shutdown_arq - shutdown ARQ
439 * @hw: pointer to the hardware structure
440 *
441 * The main shutdown routine for the Admin Receive Queue
442 **/
443static int i40e_shutdown_arq(struct i40e_hw *hw)
444{
445 int ret_code = 0;
446
447 mutex_lock(&hw->aq.arq_mutex);
448
449 if (hw->aq.arq.count == 0) {
450 ret_code = -EBUSY;
451 goto shutdown_arq_out;
452 }
453
454 /* Stop firmware AdminQ processing */
455 wr32(hw, I40E_PF_ARQH, 0);
456 wr32(hw, I40E_PF_ARQT, 0);
457 wr32(hw, I40E_PF_ARQLEN, 0);
458 wr32(hw, I40E_PF_ARQBAL, 0);
459 wr32(hw, I40E_PF_ARQBAH, 0);
460
461 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
462
463 /* free ring buffers */
464 i40e_free_arq_bufs(hw);
465
466shutdown_arq_out:
467 mutex_unlock(&hw->aq.arq_mutex);
468 return ret_code;
469}
470
471/**
472 * i40e_set_hw_caps - set HW flags
473 * @hw: pointer to the hardware structure
474 **/
475static void i40e_set_hw_caps(struct i40e_hw *hw)
476{
477 bitmap_zero(hw->caps, I40E_HW_CAPS_NBITS);
478
479 switch (hw->mac.type) {
480 case I40E_MAC_XL710:
481 if (i40e_is_aq_api_ver_ge(hw, 1,
482 I40E_MINOR_VER_GET_LINK_INFO_XL710)) {
483 set_bit(I40E_HW_CAP_AQ_PHY_ACCESS, hw->caps);
484 set_bit(I40E_HW_CAP_FW_LLDP_STOPPABLE, hw->caps);
485 /* The ability to RX (not drop) 802.1ad frames */
486 set_bit(I40E_HW_CAP_802_1AD, hw->caps);
487 }
488 if (i40e_is_aq_api_ver_ge(hw, 1, 5)) {
489 /* Supported in FW API version higher than 1.4 */
490 set_bit(I40E_HW_CAP_GENEVE_OFFLOAD, hw->caps);
491 }
492 if (i40e_is_fw_ver_lt(hw, 4, 33)) {
493 set_bit(I40E_HW_CAP_RESTART_AUTONEG, hw->caps);
494 /* No DCB support for FW < v4.33 */
495 set_bit(I40E_HW_CAP_NO_DCB_SUPPORT, hw->caps);
496 }
497 if (i40e_is_fw_ver_lt(hw, 4, 3)) {
498 /* Disable FW LLDP if FW < v4.3 */
499 set_bit(I40E_HW_CAP_STOP_FW_LLDP, hw->caps);
500 }
501 if (i40e_is_fw_ver_ge(hw, 4, 40)) {
502 /* Use the FW Set LLDP MIB API if FW >= v4.40 */
503 set_bit(I40E_HW_CAP_USE_SET_LLDP_MIB, hw->caps);
504 }
505 if (i40e_is_fw_ver_ge(hw, 6, 0)) {
506 /* Enable PTP L4 if FW > v6.0 */
507 set_bit(I40E_HW_CAP_PTP_L4, hw->caps);
508 }
509 break;
510 case I40E_MAC_X722:
511 set_bit(I40E_HW_CAP_AQ_SRCTL_ACCESS_ENABLE, hw->caps);
512 set_bit(I40E_HW_CAP_NVM_READ_REQUIRES_LOCK, hw->caps);
513 set_bit(I40E_HW_CAP_RSS_AQ, hw->caps);
514 set_bit(I40E_HW_CAP_128_QP_RSS, hw->caps);
515 set_bit(I40E_HW_CAP_ATR_EVICT, hw->caps);
516 set_bit(I40E_HW_CAP_WB_ON_ITR, hw->caps);
517 set_bit(I40E_HW_CAP_MULTI_TCP_UDP_RSS_PCTYPE, hw->caps);
518 set_bit(I40E_HW_CAP_NO_PCI_LINK_CHECK, hw->caps);
519 set_bit(I40E_HW_CAP_USE_SET_LLDP_MIB, hw->caps);
520 set_bit(I40E_HW_CAP_GENEVE_OFFLOAD, hw->caps);
521 set_bit(I40E_HW_CAP_PTP_L4, hw->caps);
522 set_bit(I40E_HW_CAP_WOL_MC_MAGIC_PKT_WAKE, hw->caps);
523 set_bit(I40E_HW_CAP_OUTER_UDP_CSUM, hw->caps);
524
525 if (rd32(hw, I40E_GLQF_FDEVICTENA(1)) !=
526 I40E_FDEVICT_PCTYPE_DEFAULT) {
527 hw_warn(hw, "FD EVICT PCTYPES are not right, disable FD HW EVICT\n");
528 clear_bit(I40E_HW_CAP_ATR_EVICT, hw->caps);
529 }
530
531 if (i40e_is_aq_api_ver_ge(hw, 1,
532 I40E_MINOR_VER_FW_LLDP_STOPPABLE_X722))
533 set_bit(I40E_HW_CAP_FW_LLDP_STOPPABLE, hw->caps);
534
535 if (i40e_is_aq_api_ver_ge(hw, 1,
536 I40E_MINOR_VER_GET_LINK_INFO_X722))
537 set_bit(I40E_HW_CAP_AQ_PHY_ACCESS, hw->caps);
538
539 if (i40e_is_aq_api_ver_ge(hw, 1,
540 I40E_MINOR_VER_FW_REQUEST_FEC_X722))
541 set_bit(I40E_HW_CAP_X722_FEC_REQUEST, hw->caps);
542
543 fallthrough;
544 default:
545 break;
546 }
547
548 /* Newer versions of firmware require lock when reading the NVM */
549 if (i40e_is_aq_api_ver_ge(hw, 1, 5))
550 set_bit(I40E_HW_CAP_NVM_READ_REQUIRES_LOCK, hw->caps);
551
552 /* The ability to RX (not drop) 802.1ad frames was added in API 1.7 */
553 if (i40e_is_aq_api_ver_ge(hw, 1, 7))
554 set_bit(I40E_HW_CAP_802_1AD, hw->caps);
555
556 if (i40e_is_aq_api_ver_ge(hw, 1, 8))
557 set_bit(I40E_HW_CAP_FW_LLDP_PERSISTENT, hw->caps);
558
559 if (i40e_is_aq_api_ver_ge(hw, 1, 9))
560 set_bit(I40E_HW_CAP_AQ_PHY_ACCESS_EXTENDED, hw->caps);
561}
562
563/**
564 * i40e_init_adminq - main initialization routine for Admin Queue
565 * @hw: pointer to the hardware structure
566 *
567 * Prior to calling this function, drivers *MUST* set the following fields
568 * in the hw->aq structure:
569 * - hw->aq.num_asq_entries
570 * - hw->aq.num_arq_entries
571 * - hw->aq.arq_buf_size
572 * - hw->aq.asq_buf_size
573 **/
574int i40e_init_adminq(struct i40e_hw *hw)
575{
576 u16 cfg_ptr, oem_hi, oem_lo;
577 u16 eetrack_lo, eetrack_hi;
578 int retry = 0;
579 int ret_code;
580
581 /* verify input for valid configuration */
582 if ((hw->aq.num_arq_entries == 0) ||
583 (hw->aq.num_asq_entries == 0) ||
584 (hw->aq.arq_buf_size == 0) ||
585 (hw->aq.asq_buf_size == 0)) {
586 ret_code = -EIO;
587 goto init_adminq_exit;
588 }
589
590 /* setup ASQ command write back timeout */
591 hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
592
593 /* allocate the ASQ */
594 ret_code = i40e_init_asq(hw);
595 if (ret_code)
596 goto init_adminq_destroy_locks;
597
598 /* allocate the ARQ */
599 ret_code = i40e_init_arq(hw);
600 if (ret_code)
601 goto init_adminq_free_asq;
602
603 /* There are some cases where the firmware may not be quite ready
604 * for AdminQ operations, so we retry the AdminQ setup a few times
605 * if we see timeouts in this first AQ call.
606 */
607 do {
608 ret_code = i40e_aq_get_firmware_version(hw,
609 &hw->aq.fw_maj_ver,
610 &hw->aq.fw_min_ver,
611 &hw->aq.fw_build,
612 &hw->aq.api_maj_ver,
613 &hw->aq.api_min_ver,
614 NULL);
615 if (ret_code != -EIO)
616 break;
617 retry++;
618 msleep(100);
619 i40e_resume_aq(hw);
620 } while (retry < 10);
621 if (ret_code != 0)
622 goto init_adminq_free_arq;
623
624 /* Some features were introduced in different FW API version
625 * for different MAC type.
626 */
627 i40e_set_hw_caps(hw);
628
629 /* get the NVM version info */
630 i40e_read_nvm_word(hw, I40E_SR_NVM_DEV_STARTER_VERSION,
631 &hw->nvm.version);
632 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_LO, &eetrack_lo);
633 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_HI, &eetrack_hi);
634 hw->nvm.eetrack = (eetrack_hi << 16) | eetrack_lo;
635 i40e_read_nvm_word(hw, I40E_SR_BOOT_CONFIG_PTR, &cfg_ptr);
636 i40e_read_nvm_word(hw, (cfg_ptr + I40E_NVM_OEM_VER_OFF),
637 &oem_hi);
638 i40e_read_nvm_word(hw, (cfg_ptr + (I40E_NVM_OEM_VER_OFF + 1)),
639 &oem_lo);
640 hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
641
642 if (i40e_is_aq_api_ver_ge(hw, I40E_FW_API_VERSION_MAJOR + 1, 0)) {
643 ret_code = -EIO;
644 goto init_adminq_free_arq;
645 }
646
647 /* pre-emptive resource lock release */
648 i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
649 hw->nvm_release_on_done = false;
650 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
651
652 ret_code = 0;
653
654 /* success! */
655 goto init_adminq_exit;
656
657init_adminq_free_arq:
658 i40e_shutdown_arq(hw);
659init_adminq_free_asq:
660 i40e_shutdown_asq(hw);
661init_adminq_destroy_locks:
662
663init_adminq_exit:
664 return ret_code;
665}
666
667/**
668 * i40e_shutdown_adminq - shutdown routine for the Admin Queue
669 * @hw: pointer to the hardware structure
670 **/
671void i40e_shutdown_adminq(struct i40e_hw *hw)
672{
673 if (i40e_check_asq_alive(hw))
674 i40e_aq_queue_shutdown(hw, true);
675
676 i40e_shutdown_asq(hw);
677 i40e_shutdown_arq(hw);
678
679 if (hw->nvm_buff.va)
680 i40e_free_virt_mem(hw, &hw->nvm_buff);
681}
682
683/**
684 * i40e_clean_asq - cleans Admin send queue
685 * @hw: pointer to the hardware structure
686 *
687 * returns the number of free desc
688 **/
689static u16 i40e_clean_asq(struct i40e_hw *hw)
690{
691 struct i40e_adminq_ring *asq = &(hw->aq.asq);
692 struct i40e_asq_cmd_details *details;
693 u16 ntc = asq->next_to_clean;
694 struct i40e_aq_desc desc_cb;
695 struct i40e_aq_desc *desc;
696
697 desc = I40E_ADMINQ_DESC(*asq, ntc);
698 details = I40E_ADMINQ_DETAILS(*asq, ntc);
699 while (rd32(hw, I40E_PF_ATQH) != ntc) {
700 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
701 "ntc %d head %d.\n", ntc, rd32(hw, I40E_PF_ATQH));
702
703 if (details->callback) {
704 I40E_ADMINQ_CALLBACK cb_func =
705 (I40E_ADMINQ_CALLBACK)details->callback;
706 desc_cb = *desc;
707 cb_func(hw, &desc_cb);
708 }
709 memset(desc, 0, sizeof(*desc));
710 memset(details, 0, sizeof(*details));
711 ntc++;
712 if (ntc == asq->count)
713 ntc = 0;
714 desc = I40E_ADMINQ_DESC(*asq, ntc);
715 details = I40E_ADMINQ_DETAILS(*asq, ntc);
716 }
717
718 asq->next_to_clean = ntc;
719
720 return I40E_DESC_UNUSED(asq);
721}
722
723/**
724 * i40e_asq_done - check if FW has processed the Admin Send Queue
725 * @hw: pointer to the hw struct
726 *
727 * Returns true if the firmware has processed all descriptors on the
728 * admin send queue. Returns false if there are still requests pending.
729 **/
730static bool i40e_asq_done(struct i40e_hw *hw)
731{
732 /* AQ designers suggest use of head for better
733 * timing reliability than DD bit
734 */
735 return rd32(hw, I40E_PF_ATQH) == hw->aq.asq.next_to_use;
736
737}
738
739/**
740 * i40e_asq_send_command_atomic_exec - send command to Admin Queue
741 * @hw: pointer to the hw struct
742 * @desc: prefilled descriptor describing the command (non DMA mem)
743 * @buff: buffer to use for indirect commands
744 * @buff_size: size of buffer for indirect commands
745 * @cmd_details: pointer to command details structure
746 * @is_atomic_context: is the function called in an atomic context?
747 *
748 * This is the main send command driver routine for the Admin Queue send
749 * queue. It runs the queue, cleans the queue, etc
750 **/
751static int
752i40e_asq_send_command_atomic_exec(struct i40e_hw *hw,
753 struct i40e_aq_desc *desc,
754 void *buff, /* can be NULL */
755 u16 buff_size,
756 struct i40e_asq_cmd_details *cmd_details,
757 bool is_atomic_context)
758{
759 struct i40e_dma_mem *dma_buff = NULL;
760 struct i40e_asq_cmd_details *details;
761 struct i40e_aq_desc *desc_on_ring;
762 bool cmd_completed = false;
763 u16 retval = 0;
764 int status = 0;
765 u32 val = 0;
766
767 if (hw->aq.asq.count == 0) {
768 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
769 "AQTX: Admin queue not initialized.\n");
770 status = -EIO;
771 goto asq_send_command_error;
772 }
773
774 hw->aq.asq_last_status = I40E_AQ_RC_OK;
775
776 val = rd32(hw, I40E_PF_ATQH);
777 if (val >= hw->aq.num_asq_entries) {
778 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
779 "AQTX: head overrun at %d\n", val);
780 status = -ENOSPC;
781 goto asq_send_command_error;
782 }
783
784 details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
785 if (cmd_details) {
786 *details = *cmd_details;
787
788 /* If the cmd_details are defined copy the cookie. The
789 * cpu_to_le32 is not needed here because the data is ignored
790 * by the FW, only used by the driver
791 */
792 if (details->cookie) {
793 desc->cookie_high =
794 cpu_to_le32(upper_32_bits(details->cookie));
795 desc->cookie_low =
796 cpu_to_le32(lower_32_bits(details->cookie));
797 }
798 } else {
799 memset(details, 0, sizeof(struct i40e_asq_cmd_details));
800 }
801
802 /* clear requested flags and then set additional flags if defined */
803 desc->flags &= ~cpu_to_le16(details->flags_dis);
804 desc->flags |= cpu_to_le16(details->flags_ena);
805
806 if (buff_size > hw->aq.asq_buf_size) {
807 i40e_debug(hw,
808 I40E_DEBUG_AQ_MESSAGE,
809 "AQTX: Invalid buffer size: %d.\n",
810 buff_size);
811 status = -EINVAL;
812 goto asq_send_command_error;
813 }
814
815 if (details->postpone && !details->async) {
816 i40e_debug(hw,
817 I40E_DEBUG_AQ_MESSAGE,
818 "AQTX: Async flag not set along with postpone flag");
819 status = -EINVAL;
820 goto asq_send_command_error;
821 }
822
823 /* call clean and check queue available function to reclaim the
824 * descriptors that were processed by FW, the function returns the
825 * number of desc available
826 */
827 /* the clean function called here could be called in a separate thread
828 * in case of asynchronous completions
829 */
830 if (i40e_clean_asq(hw) == 0) {
831 i40e_debug(hw,
832 I40E_DEBUG_AQ_MESSAGE,
833 "AQTX: Error queue is full.\n");
834 status = -ENOSPC;
835 goto asq_send_command_error;
836 }
837
838 /* initialize the temp desc pointer with the right desc */
839 desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
840
841 /* if the desc is available copy the temp desc to the right place */
842 *desc_on_ring = *desc;
843
844 /* if buff is not NULL assume indirect command */
845 if (buff != NULL) {
846 dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
847 /* copy the user buff into the respective DMA buff */
848 memcpy(dma_buff->va, buff, buff_size);
849 desc_on_ring->datalen = cpu_to_le16(buff_size);
850
851 /* Update the address values in the desc with the pa value
852 * for respective buffer
853 */
854 desc_on_ring->params.external.addr_high =
855 cpu_to_le32(upper_32_bits(dma_buff->pa));
856 desc_on_ring->params.external.addr_low =
857 cpu_to_le32(lower_32_bits(dma_buff->pa));
858 }
859
860 /* bump the tail */
861 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQTX: desc and buffer:\n");
862 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
863 buff, buff_size);
864 (hw->aq.asq.next_to_use)++;
865 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
866 hw->aq.asq.next_to_use = 0;
867 if (!details->postpone)
868 wr32(hw, I40E_PF_ATQT, hw->aq.asq.next_to_use);
869
870 /* if cmd_details are not defined or async flag is not set,
871 * we need to wait for desc write back
872 */
873 if (!details->async && !details->postpone) {
874 u32 total_delay = 0;
875
876 do {
877 /* AQ designers suggest use of head for better
878 * timing reliability than DD bit
879 */
880 if (i40e_asq_done(hw))
881 break;
882
883 if (is_atomic_context)
884 udelay(50);
885 else
886 usleep_range(40, 60);
887
888 total_delay += 50;
889 } while (total_delay < hw->aq.asq_cmd_timeout);
890 }
891
892 /* if ready, copy the desc back to temp */
893 if (i40e_asq_done(hw)) {
894 *desc = *desc_on_ring;
895 if (buff != NULL)
896 memcpy(buff, dma_buff->va, buff_size);
897 retval = le16_to_cpu(desc->retval);
898 if (retval != 0) {
899 i40e_debug(hw,
900 I40E_DEBUG_AQ_MESSAGE,
901 "AQTX: Command completed with error 0x%X.\n",
902 retval);
903
904 /* strip off FW internal code */
905 retval &= 0xff;
906 }
907 cmd_completed = true;
908 if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
909 status = 0;
910 else if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_EBUSY)
911 status = -EBUSY;
912 else
913 status = -EIO;
914 hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
915 }
916
917 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
918 "AQTX: desc and buffer writeback:\n");
919 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
920
921 /* save writeback aq if requested */
922 if (details->wb_desc)
923 *details->wb_desc = *desc_on_ring;
924
925 /* update the error if time out occurred */
926 if ((!cmd_completed) &&
927 (!details->async && !details->postpone)) {
928 if (rd32(hw, I40E_PF_ATQLEN) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
929 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
930 "AQTX: AQ Critical error.\n");
931 status = -EIO;
932 } else {
933 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
934 "AQTX: Writeback timeout.\n");
935 status = -EIO;
936 }
937 }
938
939asq_send_command_error:
940 return status;
941}
942
943/**
944 * i40e_asq_send_command_atomic - send command to Admin Queue
945 * @hw: pointer to the hw struct
946 * @desc: prefilled descriptor describing the command (non DMA mem)
947 * @buff: buffer to use for indirect commands
948 * @buff_size: size of buffer for indirect commands
949 * @cmd_details: pointer to command details structure
950 * @is_atomic_context: is the function called in an atomic context?
951 *
952 * Acquires the lock and calls the main send command execution
953 * routine.
954 **/
955int
956i40e_asq_send_command_atomic(struct i40e_hw *hw,
957 struct i40e_aq_desc *desc,
958 void *buff, /* can be NULL */
959 u16 buff_size,
960 struct i40e_asq_cmd_details *cmd_details,
961 bool is_atomic_context)
962{
963 int status;
964
965 mutex_lock(&hw->aq.asq_mutex);
966 status = i40e_asq_send_command_atomic_exec(hw, desc, buff, buff_size,
967 cmd_details,
968 is_atomic_context);
969
970 mutex_unlock(&hw->aq.asq_mutex);
971 return status;
972}
973
974int
975i40e_asq_send_command(struct i40e_hw *hw, struct i40e_aq_desc *desc,
976 void *buff, /* can be NULL */ u16 buff_size,
977 struct i40e_asq_cmd_details *cmd_details)
978{
979 return i40e_asq_send_command_atomic(hw, desc, buff, buff_size,
980 cmd_details, false);
981}
982
983/**
984 * i40e_asq_send_command_atomic_v2 - send command to Admin Queue
985 * @hw: pointer to the hw struct
986 * @desc: prefilled descriptor describing the command (non DMA mem)
987 * @buff: buffer to use for indirect commands
988 * @buff_size: size of buffer for indirect commands
989 * @cmd_details: pointer to command details structure
990 * @is_atomic_context: is the function called in an atomic context?
991 * @aq_status: pointer to Admin Queue status return value
992 *
993 * Acquires the lock and calls the main send command execution
994 * routine. Returns the last Admin Queue status in aq_status
995 * to avoid race conditions in access to hw->aq.asq_last_status.
996 **/
997int
998i40e_asq_send_command_atomic_v2(struct i40e_hw *hw,
999 struct i40e_aq_desc *desc,
1000 void *buff, /* can be NULL */
1001 u16 buff_size,
1002 struct i40e_asq_cmd_details *cmd_details,
1003 bool is_atomic_context,
1004 enum i40e_admin_queue_err *aq_status)
1005{
1006 int status;
1007
1008 mutex_lock(&hw->aq.asq_mutex);
1009 status = i40e_asq_send_command_atomic_exec(hw, desc, buff,
1010 buff_size,
1011 cmd_details,
1012 is_atomic_context);
1013 if (aq_status)
1014 *aq_status = hw->aq.asq_last_status;
1015 mutex_unlock(&hw->aq.asq_mutex);
1016 return status;
1017}
1018
1019int
1020i40e_asq_send_command_v2(struct i40e_hw *hw, struct i40e_aq_desc *desc,
1021 void *buff, /* can be NULL */ u16 buff_size,
1022 struct i40e_asq_cmd_details *cmd_details,
1023 enum i40e_admin_queue_err *aq_status)
1024{
1025 return i40e_asq_send_command_atomic_v2(hw, desc, buff, buff_size,
1026 cmd_details, true, aq_status);
1027}
1028
1029/**
1030 * i40e_fill_default_direct_cmd_desc - AQ descriptor helper function
1031 * @desc: pointer to the temp descriptor (non DMA mem)
1032 * @opcode: the opcode can be used to decide which flags to turn off or on
1033 *
1034 * Fill the desc with default values
1035 **/
1036void i40e_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
1037 u16 opcode)
1038{
1039 /* zero out the desc */
1040 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
1041 desc->opcode = cpu_to_le16(opcode);
1042 desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
1043}
1044
1045/**
1046 * i40e_clean_arq_element
1047 * @hw: pointer to the hw struct
1048 * @e: event info from the receive descriptor, includes any buffers
1049 * @pending: number of events that could be left to process
1050 *
1051 * This function cleans one Admin Receive Queue element and returns
1052 * the contents through e. It can also return how many events are
1053 * left to process through 'pending'
1054 **/
1055int i40e_clean_arq_element(struct i40e_hw *hw,
1056 struct i40e_arq_event_info *e,
1057 u16 *pending)
1058{
1059 u16 ntc = hw->aq.arq.next_to_clean;
1060 struct i40e_aq_desc *desc;
1061 struct i40e_dma_mem *bi;
1062 int ret_code = 0;
1063 u16 desc_idx;
1064 u16 datalen;
1065 u16 flags;
1066 u16 ntu;
1067
1068 /* pre-clean the event info */
1069 memset(&e->desc, 0, sizeof(e->desc));
1070
1071 /* take the lock before we start messing with the ring */
1072 mutex_lock(&hw->aq.arq_mutex);
1073
1074 if (hw->aq.arq.count == 0) {
1075 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
1076 "AQRX: Admin queue not initialized.\n");
1077 ret_code = -EIO;
1078 goto clean_arq_element_err;
1079 }
1080
1081 /* set next_to_use to head */
1082 ntu = rd32(hw, I40E_PF_ARQH) & I40E_PF_ARQH_ARQH_MASK;
1083 if (ntu == ntc) {
1084 /* nothing to do - shouldn't need to update ring's values */
1085 ret_code = -EALREADY;
1086 goto clean_arq_element_out;
1087 }
1088
1089 /* now clean the next descriptor */
1090 desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
1091 desc_idx = ntc;
1092
1093 hw->aq.arq_last_status =
1094 (enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
1095 flags = le16_to_cpu(desc->flags);
1096 if (flags & I40E_AQ_FLAG_ERR) {
1097 ret_code = -EIO;
1098 i40e_debug(hw,
1099 I40E_DEBUG_AQ_MESSAGE,
1100 "AQRX: Event received with error 0x%X.\n",
1101 hw->aq.arq_last_status);
1102 }
1103
1104 e->desc = *desc;
1105 datalen = le16_to_cpu(desc->datalen);
1106 e->msg_len = min(datalen, e->buf_len);
1107 if (e->msg_buf != NULL && (e->msg_len != 0))
1108 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
1109 e->msg_len);
1110
1111 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQRX: desc and buffer:\n");
1112 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
1113 hw->aq.arq_buf_size);
1114
1115 /* Restore the original datalen and buffer address in the desc,
1116 * FW updates datalen to indicate the event message
1117 * size
1118 */
1119 bi = &hw->aq.arq.r.arq_bi[ntc];
1120 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
1121
1122 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
1123 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
1124 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
1125 desc->datalen = cpu_to_le16((u16)bi->size);
1126 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
1127 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
1128
1129 /* set tail = the last cleaned desc index. */
1130 wr32(hw, I40E_PF_ARQT, ntc);
1131 /* ntc is updated to tail + 1 */
1132 ntc++;
1133 if (ntc == hw->aq.num_arq_entries)
1134 ntc = 0;
1135 hw->aq.arq.next_to_clean = ntc;
1136 hw->aq.arq.next_to_use = ntu;
1137
1138 i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode), &e->desc);
1139clean_arq_element_out:
1140 /* Set pending if needed, unlock and return */
1141 if (pending)
1142 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
1143clean_arq_element_err:
1144 mutex_unlock(&hw->aq.arq_mutex);
1145
1146 return ret_code;
1147}
1148
1149static void i40e_resume_aq(struct i40e_hw *hw)
1150{
1151 /* Registers are reset after PF reset */
1152 hw->aq.asq.next_to_use = 0;
1153 hw->aq.asq.next_to_clean = 0;
1154
1155 i40e_config_asq_regs(hw);
1156
1157 hw->aq.arq.next_to_use = 0;
1158 hw->aq.arq.next_to_clean = 0;
1159
1160 i40e_config_arq_regs(hw);
1161}
1/*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux 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
33static void i40e_resume_aq(struct i40e_hw *hw);
34
35/**
36 * i40e_adminq_init_regs - Initialize AdminQ registers
37 * @hw: pointer to the hardware structure
38 *
39 * This assumes the alloc_asq and alloc_arq functions have already been called
40 **/
41static void i40e_adminq_init_regs(struct i40e_hw *hw)
42{
43 /* set head and tail registers in our local struct */
44 if (i40e_is_vf(hw)) {
45 hw->aq.asq.tail = I40E_VF_ATQT1;
46 hw->aq.asq.head = I40E_VF_ATQH1;
47 hw->aq.asq.len = I40E_VF_ATQLEN1;
48 hw->aq.asq.bal = I40E_VF_ATQBAL1;
49 hw->aq.asq.bah = I40E_VF_ATQBAH1;
50 hw->aq.arq.tail = I40E_VF_ARQT1;
51 hw->aq.arq.head = I40E_VF_ARQH1;
52 hw->aq.arq.len = I40E_VF_ARQLEN1;
53 hw->aq.arq.bal = I40E_VF_ARQBAL1;
54 hw->aq.arq.bah = I40E_VF_ARQBAH1;
55 } else {
56 hw->aq.asq.tail = I40E_PF_ATQT;
57 hw->aq.asq.head = I40E_PF_ATQH;
58 hw->aq.asq.len = I40E_PF_ATQLEN;
59 hw->aq.asq.bal = I40E_PF_ATQBAL;
60 hw->aq.asq.bah = I40E_PF_ATQBAH;
61 hw->aq.arq.tail = I40E_PF_ARQT;
62 hw->aq.arq.head = I40E_PF_ARQH;
63 hw->aq.arq.len = I40E_PF_ARQLEN;
64 hw->aq.arq.bal = I40E_PF_ARQBAL;
65 hw->aq.arq.bah = I40E_PF_ARQBAH;
66 }
67}
68
69/**
70 * i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
71 * @hw: pointer to the hardware structure
72 **/
73static i40e_status i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
74{
75 i40e_status ret_code;
76
77 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
78 i40e_mem_atq_ring,
79 (hw->aq.num_asq_entries *
80 sizeof(struct i40e_aq_desc)),
81 I40E_ADMINQ_DESC_ALIGNMENT);
82 if (ret_code)
83 return ret_code;
84
85 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
86 (hw->aq.num_asq_entries *
87 sizeof(struct i40e_asq_cmd_details)));
88 if (ret_code) {
89 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
90 return ret_code;
91 }
92
93 return ret_code;
94}
95
96/**
97 * i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
98 * @hw: pointer to the hardware structure
99 **/
100static i40e_status i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
101{
102 i40e_status ret_code;
103
104 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
105 i40e_mem_arq_ring,
106 (hw->aq.num_arq_entries *
107 sizeof(struct i40e_aq_desc)),
108 I40E_ADMINQ_DESC_ALIGNMENT);
109
110 return ret_code;
111}
112
113/**
114 * i40e_free_adminq_asq - Free Admin Queue send rings
115 * @hw: pointer to the hardware structure
116 *
117 * This assumes the posted send buffers have already been cleaned
118 * and de-allocated
119 **/
120static void i40e_free_adminq_asq(struct i40e_hw *hw)
121{
122 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
123}
124
125/**
126 * i40e_free_adminq_arq - Free Admin Queue receive rings
127 * @hw: pointer to the hardware structure
128 *
129 * This assumes the posted receive buffers have already been cleaned
130 * and de-allocated
131 **/
132static void i40e_free_adminq_arq(struct i40e_hw *hw)
133{
134 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
135}
136
137/**
138 * i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
139 * @hw: pointer to the hardware structure
140 **/
141static i40e_status i40e_alloc_arq_bufs(struct i40e_hw *hw)
142{
143 i40e_status ret_code;
144 struct i40e_aq_desc *desc;
145 struct i40e_dma_mem *bi;
146 int i;
147
148 /* We'll be allocating the buffer info memory first, then we can
149 * allocate the mapped buffers for the event processing
150 */
151
152 /* buffer_info structures do not need alignment */
153 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
154 (hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
155 if (ret_code)
156 goto alloc_arq_bufs;
157 hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
158
159 /* allocate the mapped buffers */
160 for (i = 0; i < hw->aq.num_arq_entries; i++) {
161 bi = &hw->aq.arq.r.arq_bi[i];
162 ret_code = i40e_allocate_dma_mem(hw, bi,
163 i40e_mem_arq_buf,
164 hw->aq.arq_buf_size,
165 I40E_ADMINQ_DESC_ALIGNMENT);
166 if (ret_code)
167 goto unwind_alloc_arq_bufs;
168
169 /* now configure the descriptors for use */
170 desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
171
172 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
173 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
174 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
175 desc->opcode = 0;
176 /* This is in accordance with Admin queue design, there is no
177 * register for buffer size configuration
178 */
179 desc->datalen = cpu_to_le16((u16)bi->size);
180 desc->retval = 0;
181 desc->cookie_high = 0;
182 desc->cookie_low = 0;
183 desc->params.external.addr_high =
184 cpu_to_le32(upper_32_bits(bi->pa));
185 desc->params.external.addr_low =
186 cpu_to_le32(lower_32_bits(bi->pa));
187 desc->params.external.param0 = 0;
188 desc->params.external.param1 = 0;
189 }
190
191alloc_arq_bufs:
192 return ret_code;
193
194unwind_alloc_arq_bufs:
195 /* don't try to free the one that failed... */
196 i--;
197 for (; i >= 0; i--)
198 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
199 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
200
201 return ret_code;
202}
203
204/**
205 * i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
206 * @hw: pointer to the hardware structure
207 **/
208static i40e_status i40e_alloc_asq_bufs(struct i40e_hw *hw)
209{
210 i40e_status ret_code;
211 struct i40e_dma_mem *bi;
212 int i;
213
214 /* No mapped memory needed yet, just the buffer info structures */
215 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
216 (hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
217 if (ret_code)
218 goto alloc_asq_bufs;
219 hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
220
221 /* allocate the mapped buffers */
222 for (i = 0; i < hw->aq.num_asq_entries; i++) {
223 bi = &hw->aq.asq.r.asq_bi[i];
224 ret_code = i40e_allocate_dma_mem(hw, bi,
225 i40e_mem_asq_buf,
226 hw->aq.asq_buf_size,
227 I40E_ADMINQ_DESC_ALIGNMENT);
228 if (ret_code)
229 goto unwind_alloc_asq_bufs;
230 }
231alloc_asq_bufs:
232 return ret_code;
233
234unwind_alloc_asq_bufs:
235 /* don't try to free the one that failed... */
236 i--;
237 for (; i >= 0; i--)
238 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
239 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
240
241 return ret_code;
242}
243
244/**
245 * i40e_free_arq_bufs - Free receive queue buffer info elements
246 * @hw: pointer to the hardware structure
247 **/
248static void i40e_free_arq_bufs(struct i40e_hw *hw)
249{
250 int i;
251
252 /* free descriptors */
253 for (i = 0; i < hw->aq.num_arq_entries; i++)
254 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
255
256 /* free the descriptor memory */
257 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
258
259 /* free the dma header */
260 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
261}
262
263/**
264 * i40e_free_asq_bufs - Free send queue buffer info elements
265 * @hw: pointer to the hardware structure
266 **/
267static void i40e_free_asq_bufs(struct i40e_hw *hw)
268{
269 int i;
270
271 /* only unmap if the address is non-NULL */
272 for (i = 0; i < hw->aq.num_asq_entries; i++)
273 if (hw->aq.asq.r.asq_bi[i].pa)
274 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
275
276 /* free the buffer info list */
277 i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
278
279 /* free the descriptor memory */
280 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
281
282 /* free the dma header */
283 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
284}
285
286/**
287 * i40e_config_asq_regs - configure ASQ registers
288 * @hw: pointer to the hardware structure
289 *
290 * Configure base address and length registers for the transmit queue
291 **/
292static i40e_status i40e_config_asq_regs(struct i40e_hw *hw)
293{
294 i40e_status ret_code = 0;
295 u32 reg = 0;
296
297 /* Clear Head and Tail */
298 wr32(hw, hw->aq.asq.head, 0);
299 wr32(hw, hw->aq.asq.tail, 0);
300
301 /* set starting point */
302 wr32(hw, hw->aq.asq.len, (hw->aq.num_asq_entries |
303 I40E_PF_ATQLEN_ATQENABLE_MASK));
304 wr32(hw, hw->aq.asq.bal, lower_32_bits(hw->aq.asq.desc_buf.pa));
305 wr32(hw, hw->aq.asq.bah, upper_32_bits(hw->aq.asq.desc_buf.pa));
306
307 /* Check one register to verify that config was applied */
308 reg = rd32(hw, hw->aq.asq.bal);
309 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
310 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
311
312 return ret_code;
313}
314
315/**
316 * i40e_config_arq_regs - ARQ register configuration
317 * @hw: pointer to the hardware structure
318 *
319 * Configure base address and length registers for the receive (event queue)
320 **/
321static i40e_status i40e_config_arq_regs(struct i40e_hw *hw)
322{
323 i40e_status ret_code = 0;
324 u32 reg = 0;
325
326 /* Clear Head and Tail */
327 wr32(hw, hw->aq.arq.head, 0);
328 wr32(hw, hw->aq.arq.tail, 0);
329
330 /* set starting point */
331 wr32(hw, hw->aq.arq.len, (hw->aq.num_arq_entries |
332 I40E_PF_ARQLEN_ARQENABLE_MASK));
333 wr32(hw, hw->aq.arq.bal, lower_32_bits(hw->aq.arq.desc_buf.pa));
334 wr32(hw, hw->aq.arq.bah, upper_32_bits(hw->aq.arq.desc_buf.pa));
335
336 /* Update tail in the HW to post pre-allocated buffers */
337 wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
338
339 /* Check one register to verify that config was applied */
340 reg = rd32(hw, hw->aq.arq.bal);
341 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
342 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
343
344 return ret_code;
345}
346
347/**
348 * i40e_init_asq - main initialization routine for ASQ
349 * @hw: pointer to the hardware structure
350 *
351 * This is the main initialization routine for the Admin Send Queue
352 * Prior to calling this function, drivers *MUST* set the following fields
353 * in the hw->aq structure:
354 * - hw->aq.num_asq_entries
355 * - hw->aq.arq_buf_size
356 *
357 * Do *NOT* hold the lock when calling this as the memory allocation routines
358 * called are not going to be atomic context safe
359 **/
360static i40e_status i40e_init_asq(struct i40e_hw *hw)
361{
362 i40e_status ret_code = 0;
363
364 if (hw->aq.asq.count > 0) {
365 /* queue already initialized */
366 ret_code = I40E_ERR_NOT_READY;
367 goto init_adminq_exit;
368 }
369
370 /* verify input for valid configuration */
371 if ((hw->aq.num_asq_entries == 0) ||
372 (hw->aq.asq_buf_size == 0)) {
373 ret_code = I40E_ERR_CONFIG;
374 goto init_adminq_exit;
375 }
376
377 hw->aq.asq.next_to_use = 0;
378 hw->aq.asq.next_to_clean = 0;
379
380 /* allocate the ring memory */
381 ret_code = i40e_alloc_adminq_asq_ring(hw);
382 if (ret_code)
383 goto init_adminq_exit;
384
385 /* allocate buffers in the rings */
386 ret_code = i40e_alloc_asq_bufs(hw);
387 if (ret_code)
388 goto init_adminq_free_rings;
389
390 /* initialize base registers */
391 ret_code = i40e_config_asq_regs(hw);
392 if (ret_code)
393 goto init_adminq_free_rings;
394
395 /* success! */
396 hw->aq.asq.count = hw->aq.num_asq_entries;
397 goto init_adminq_exit;
398
399init_adminq_free_rings:
400 i40e_free_adminq_asq(hw);
401
402init_adminq_exit:
403 return ret_code;
404}
405
406/**
407 * i40e_init_arq - initialize ARQ
408 * @hw: pointer to the hardware structure
409 *
410 * The main initialization routine for the Admin Receive (Event) Queue.
411 * Prior to calling this function, drivers *MUST* set the following fields
412 * in the hw->aq structure:
413 * - hw->aq.num_asq_entries
414 * - hw->aq.arq_buf_size
415 *
416 * Do *NOT* hold the lock when calling this as the memory allocation routines
417 * called are not going to be atomic context safe
418 **/
419static i40e_status i40e_init_arq(struct i40e_hw *hw)
420{
421 i40e_status ret_code = 0;
422
423 if (hw->aq.arq.count > 0) {
424 /* queue already initialized */
425 ret_code = I40E_ERR_NOT_READY;
426 goto init_adminq_exit;
427 }
428
429 /* verify input for valid configuration */
430 if ((hw->aq.num_arq_entries == 0) ||
431 (hw->aq.arq_buf_size == 0)) {
432 ret_code = I40E_ERR_CONFIG;
433 goto init_adminq_exit;
434 }
435
436 hw->aq.arq.next_to_use = 0;
437 hw->aq.arq.next_to_clean = 0;
438
439 /* allocate the ring memory */
440 ret_code = i40e_alloc_adminq_arq_ring(hw);
441 if (ret_code)
442 goto init_adminq_exit;
443
444 /* allocate buffers in the rings */
445 ret_code = i40e_alloc_arq_bufs(hw);
446 if (ret_code)
447 goto init_adminq_free_rings;
448
449 /* initialize base registers */
450 ret_code = i40e_config_arq_regs(hw);
451 if (ret_code)
452 goto init_adminq_free_rings;
453
454 /* success! */
455 hw->aq.arq.count = hw->aq.num_arq_entries;
456 goto init_adminq_exit;
457
458init_adminq_free_rings:
459 i40e_free_adminq_arq(hw);
460
461init_adminq_exit:
462 return ret_code;
463}
464
465/**
466 * i40e_shutdown_asq - shutdown the ASQ
467 * @hw: pointer to the hardware structure
468 *
469 * The main shutdown routine for the Admin Send Queue
470 **/
471static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
472{
473 i40e_status ret_code = 0;
474
475 mutex_lock(&hw->aq.asq_mutex);
476
477 if (hw->aq.asq.count == 0) {
478 ret_code = I40E_ERR_NOT_READY;
479 goto shutdown_asq_out;
480 }
481
482 /* Stop firmware AdminQ processing */
483 wr32(hw, hw->aq.asq.head, 0);
484 wr32(hw, hw->aq.asq.tail, 0);
485 wr32(hw, hw->aq.asq.len, 0);
486 wr32(hw, hw->aq.asq.bal, 0);
487 wr32(hw, hw->aq.asq.bah, 0);
488
489 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
490
491 /* free ring buffers */
492 i40e_free_asq_bufs(hw);
493
494shutdown_asq_out:
495 mutex_unlock(&hw->aq.asq_mutex);
496 return ret_code;
497}
498
499/**
500 * i40e_shutdown_arq - shutdown ARQ
501 * @hw: pointer to the hardware structure
502 *
503 * The main shutdown routine for the Admin Receive Queue
504 **/
505static i40e_status i40e_shutdown_arq(struct i40e_hw *hw)
506{
507 i40e_status ret_code = 0;
508
509 mutex_lock(&hw->aq.arq_mutex);
510
511 if (hw->aq.arq.count == 0) {
512 ret_code = I40E_ERR_NOT_READY;
513 goto shutdown_arq_out;
514 }
515
516 /* Stop firmware AdminQ processing */
517 wr32(hw, hw->aq.arq.head, 0);
518 wr32(hw, hw->aq.arq.tail, 0);
519 wr32(hw, hw->aq.arq.len, 0);
520 wr32(hw, hw->aq.arq.bal, 0);
521 wr32(hw, hw->aq.arq.bah, 0);
522
523 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
524
525 /* free ring buffers */
526 i40e_free_arq_bufs(hw);
527
528shutdown_arq_out:
529 mutex_unlock(&hw->aq.arq_mutex);
530 return ret_code;
531}
532
533/**
534 * i40e_init_adminq - main initialization routine for Admin Queue
535 * @hw: pointer to the hardware structure
536 *
537 * Prior to calling this function, drivers *MUST* set the following fields
538 * in the hw->aq structure:
539 * - hw->aq.num_asq_entries
540 * - hw->aq.num_arq_entries
541 * - hw->aq.arq_buf_size
542 * - hw->aq.asq_buf_size
543 **/
544i40e_status i40e_init_adminq(struct i40e_hw *hw)
545{
546 u16 cfg_ptr, oem_hi, oem_lo;
547 u16 eetrack_lo, eetrack_hi;
548 i40e_status ret_code;
549 int retry = 0;
550
551 /* verify input for valid configuration */
552 if ((hw->aq.num_arq_entries == 0) ||
553 (hw->aq.num_asq_entries == 0) ||
554 (hw->aq.arq_buf_size == 0) ||
555 (hw->aq.asq_buf_size == 0)) {
556 ret_code = I40E_ERR_CONFIG;
557 goto init_adminq_exit;
558 }
559
560 /* Set up register offsets */
561 i40e_adminq_init_regs(hw);
562
563 /* setup ASQ command write back timeout */
564 hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
565
566 /* allocate the ASQ */
567 ret_code = i40e_init_asq(hw);
568 if (ret_code)
569 goto init_adminq_destroy_locks;
570
571 /* allocate the ARQ */
572 ret_code = i40e_init_arq(hw);
573 if (ret_code)
574 goto init_adminq_free_asq;
575
576 /* There are some cases where the firmware may not be quite ready
577 * for AdminQ operations, so we retry the AdminQ setup a few times
578 * if we see timeouts in this first AQ call.
579 */
580 do {
581 ret_code = i40e_aq_get_firmware_version(hw,
582 &hw->aq.fw_maj_ver,
583 &hw->aq.fw_min_ver,
584 &hw->aq.fw_build,
585 &hw->aq.api_maj_ver,
586 &hw->aq.api_min_ver,
587 NULL);
588 if (ret_code != I40E_ERR_ADMIN_QUEUE_TIMEOUT)
589 break;
590 retry++;
591 msleep(100);
592 i40e_resume_aq(hw);
593 } while (retry < 10);
594 if (ret_code != I40E_SUCCESS)
595 goto init_adminq_free_arq;
596
597 /* get the NVM version info */
598 i40e_read_nvm_word(hw, I40E_SR_NVM_DEV_STARTER_VERSION,
599 &hw->nvm.version);
600 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_LO, &eetrack_lo);
601 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_HI, &eetrack_hi);
602 hw->nvm.eetrack = (eetrack_hi << 16) | eetrack_lo;
603 i40e_read_nvm_word(hw, I40E_SR_BOOT_CONFIG_PTR, &cfg_ptr);
604 i40e_read_nvm_word(hw, (cfg_ptr + I40E_NVM_OEM_VER_OFF),
605 &oem_hi);
606 i40e_read_nvm_word(hw, (cfg_ptr + (I40E_NVM_OEM_VER_OFF + 1)),
607 &oem_lo);
608 hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
609
610 if (hw->aq.api_maj_ver > I40E_FW_API_VERSION_MAJOR) {
611 ret_code = I40E_ERR_FIRMWARE_API_VERSION;
612 goto init_adminq_free_arq;
613 }
614
615 /* pre-emptive resource lock release */
616 i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
617 hw->nvm_release_on_done = false;
618 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
619
620 ret_code = 0;
621
622 /* success! */
623 goto init_adminq_exit;
624
625init_adminq_free_arq:
626 i40e_shutdown_arq(hw);
627init_adminq_free_asq:
628 i40e_shutdown_asq(hw);
629init_adminq_destroy_locks:
630
631init_adminq_exit:
632 return ret_code;
633}
634
635/**
636 * i40e_shutdown_adminq - shutdown routine for the Admin Queue
637 * @hw: pointer to the hardware structure
638 **/
639i40e_status i40e_shutdown_adminq(struct i40e_hw *hw)
640{
641 i40e_status ret_code = 0;
642
643 if (i40e_check_asq_alive(hw))
644 i40e_aq_queue_shutdown(hw, true);
645
646 i40e_shutdown_asq(hw);
647 i40e_shutdown_arq(hw);
648
649 if (hw->nvm_buff.va)
650 i40e_free_virt_mem(hw, &hw->nvm_buff);
651
652 return ret_code;
653}
654
655/**
656 * i40e_clean_asq - cleans Admin send queue
657 * @hw: pointer to the hardware structure
658 *
659 * returns the number of free desc
660 **/
661static u16 i40e_clean_asq(struct i40e_hw *hw)
662{
663 struct i40e_adminq_ring *asq = &(hw->aq.asq);
664 struct i40e_asq_cmd_details *details;
665 u16 ntc = asq->next_to_clean;
666 struct i40e_aq_desc desc_cb;
667 struct i40e_aq_desc *desc;
668
669 desc = I40E_ADMINQ_DESC(*asq, ntc);
670 details = I40E_ADMINQ_DETAILS(*asq, ntc);
671 while (rd32(hw, hw->aq.asq.head) != ntc) {
672 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
673 "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
674
675 if (details->callback) {
676 I40E_ADMINQ_CALLBACK cb_func =
677 (I40E_ADMINQ_CALLBACK)details->callback;
678 desc_cb = *desc;
679 cb_func(hw, &desc_cb);
680 }
681 memset(desc, 0, sizeof(*desc));
682 memset(details, 0, sizeof(*details));
683 ntc++;
684 if (ntc == asq->count)
685 ntc = 0;
686 desc = I40E_ADMINQ_DESC(*asq, ntc);
687 details = I40E_ADMINQ_DETAILS(*asq, ntc);
688 }
689
690 asq->next_to_clean = ntc;
691
692 return I40E_DESC_UNUSED(asq);
693}
694
695/**
696 * i40e_asq_done - check if FW has processed the Admin Send Queue
697 * @hw: pointer to the hw struct
698 *
699 * Returns true if the firmware has processed all descriptors on the
700 * admin send queue. Returns false if there are still requests pending.
701 **/
702static bool i40e_asq_done(struct i40e_hw *hw)
703{
704 /* AQ designers suggest use of head for better
705 * timing reliability than DD bit
706 */
707 return rd32(hw, hw->aq.asq.head) == hw->aq.asq.next_to_use;
708
709}
710
711/**
712 * i40e_asq_send_command - send command to Admin Queue
713 * @hw: pointer to the hw struct
714 * @desc: prefilled descriptor describing the command (non DMA mem)
715 * @buff: buffer to use for indirect commands
716 * @buff_size: size of buffer for indirect commands
717 * @cmd_details: pointer to command details structure
718 *
719 * This is the main send command driver routine for the Admin Queue send
720 * queue. It runs the queue, cleans the queue, etc
721 **/
722i40e_status i40e_asq_send_command(struct i40e_hw *hw,
723 struct i40e_aq_desc *desc,
724 void *buff, /* can be NULL */
725 u16 buff_size,
726 struct i40e_asq_cmd_details *cmd_details)
727{
728 i40e_status status = 0;
729 struct i40e_dma_mem *dma_buff = NULL;
730 struct i40e_asq_cmd_details *details;
731 struct i40e_aq_desc *desc_on_ring;
732 bool cmd_completed = false;
733 u16 retval = 0;
734 u32 val = 0;
735
736 mutex_lock(&hw->aq.asq_mutex);
737
738 if (hw->aq.asq.count == 0) {
739 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
740 "AQTX: Admin queue not initialized.\n");
741 status = I40E_ERR_QUEUE_EMPTY;
742 goto asq_send_command_error;
743 }
744
745 hw->aq.asq_last_status = I40E_AQ_RC_OK;
746
747 val = rd32(hw, hw->aq.asq.head);
748 if (val >= hw->aq.num_asq_entries) {
749 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
750 "AQTX: head overrun at %d\n", val);
751 status = I40E_ERR_QUEUE_EMPTY;
752 goto asq_send_command_error;
753 }
754
755 details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
756 if (cmd_details) {
757 *details = *cmd_details;
758
759 /* If the cmd_details are defined copy the cookie. The
760 * cpu_to_le32 is not needed here because the data is ignored
761 * by the FW, only used by the driver
762 */
763 if (details->cookie) {
764 desc->cookie_high =
765 cpu_to_le32(upper_32_bits(details->cookie));
766 desc->cookie_low =
767 cpu_to_le32(lower_32_bits(details->cookie));
768 }
769 } else {
770 memset(details, 0, sizeof(struct i40e_asq_cmd_details));
771 }
772
773 /* clear requested flags and then set additional flags if defined */
774 desc->flags &= ~cpu_to_le16(details->flags_dis);
775 desc->flags |= cpu_to_le16(details->flags_ena);
776
777 if (buff_size > hw->aq.asq_buf_size) {
778 i40e_debug(hw,
779 I40E_DEBUG_AQ_MESSAGE,
780 "AQTX: Invalid buffer size: %d.\n",
781 buff_size);
782 status = I40E_ERR_INVALID_SIZE;
783 goto asq_send_command_error;
784 }
785
786 if (details->postpone && !details->async) {
787 i40e_debug(hw,
788 I40E_DEBUG_AQ_MESSAGE,
789 "AQTX: Async flag not set along with postpone flag");
790 status = I40E_ERR_PARAM;
791 goto asq_send_command_error;
792 }
793
794 /* call clean and check queue available function to reclaim the
795 * descriptors that were processed by FW, the function returns the
796 * number of desc available
797 */
798 /* the clean function called here could be called in a separate thread
799 * in case of asynchronous completions
800 */
801 if (i40e_clean_asq(hw) == 0) {
802 i40e_debug(hw,
803 I40E_DEBUG_AQ_MESSAGE,
804 "AQTX: Error queue is full.\n");
805 status = I40E_ERR_ADMIN_QUEUE_FULL;
806 goto asq_send_command_error;
807 }
808
809 /* initialize the temp desc pointer with the right desc */
810 desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
811
812 /* if the desc is available copy the temp desc to the right place */
813 *desc_on_ring = *desc;
814
815 /* if buff is not NULL assume indirect command */
816 if (buff != NULL) {
817 dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
818 /* copy the user buff into the respective DMA buff */
819 memcpy(dma_buff->va, buff, buff_size);
820 desc_on_ring->datalen = cpu_to_le16(buff_size);
821
822 /* Update the address values in the desc with the pa value
823 * for respective buffer
824 */
825 desc_on_ring->params.external.addr_high =
826 cpu_to_le32(upper_32_bits(dma_buff->pa));
827 desc_on_ring->params.external.addr_low =
828 cpu_to_le32(lower_32_bits(dma_buff->pa));
829 }
830
831 /* bump the tail */
832 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQTX: desc and buffer:\n");
833 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
834 buff, buff_size);
835 (hw->aq.asq.next_to_use)++;
836 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
837 hw->aq.asq.next_to_use = 0;
838 if (!details->postpone)
839 wr32(hw, hw->aq.asq.tail, hw->aq.asq.next_to_use);
840
841 /* if cmd_details are not defined or async flag is not set,
842 * we need to wait for desc write back
843 */
844 if (!details->async && !details->postpone) {
845 u32 total_delay = 0;
846
847 do {
848 /* AQ designers suggest use of head for better
849 * timing reliability than DD bit
850 */
851 if (i40e_asq_done(hw))
852 break;
853 usleep_range(1000, 2000);
854 total_delay++;
855 } while (total_delay < hw->aq.asq_cmd_timeout);
856 }
857
858 /* if ready, copy the desc back to temp */
859 if (i40e_asq_done(hw)) {
860 *desc = *desc_on_ring;
861 if (buff != NULL)
862 memcpy(buff, dma_buff->va, buff_size);
863 retval = le16_to_cpu(desc->retval);
864 if (retval != 0) {
865 i40e_debug(hw,
866 I40E_DEBUG_AQ_MESSAGE,
867 "AQTX: Command completed with error 0x%X.\n",
868 retval);
869
870 /* strip off FW internal code */
871 retval &= 0xff;
872 }
873 cmd_completed = true;
874 if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
875 status = 0;
876 else
877 status = I40E_ERR_ADMIN_QUEUE_ERROR;
878 hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
879 }
880
881 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
882 "AQTX: desc and buffer writeback:\n");
883 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
884
885 /* save writeback aq if requested */
886 if (details->wb_desc)
887 *details->wb_desc = *desc_on_ring;
888
889 /* update the error if time out occurred */
890 if ((!cmd_completed) &&
891 (!details->async && !details->postpone)) {
892 i40e_debug(hw,
893 I40E_DEBUG_AQ_MESSAGE,
894 "AQTX: Writeback timeout.\n");
895 status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
896 }
897
898asq_send_command_error:
899 mutex_unlock(&hw->aq.asq_mutex);
900 return status;
901}
902
903/**
904 * i40e_fill_default_direct_cmd_desc - AQ descriptor helper function
905 * @desc: pointer to the temp descriptor (non DMA mem)
906 * @opcode: the opcode can be used to decide which flags to turn off or on
907 *
908 * Fill the desc with default values
909 **/
910void i40e_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
911 u16 opcode)
912{
913 /* zero out the desc */
914 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
915 desc->opcode = cpu_to_le16(opcode);
916 desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
917}
918
919/**
920 * i40e_clean_arq_element
921 * @hw: pointer to the hw struct
922 * @e: event info from the receive descriptor, includes any buffers
923 * @pending: number of events that could be left to process
924 *
925 * This function cleans one Admin Receive Queue element and returns
926 * the contents through e. It can also return how many events are
927 * left to process through 'pending'
928 **/
929i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
930 struct i40e_arq_event_info *e,
931 u16 *pending)
932{
933 i40e_status ret_code = 0;
934 u16 ntc = hw->aq.arq.next_to_clean;
935 struct i40e_aq_desc *desc;
936 struct i40e_dma_mem *bi;
937 u16 desc_idx;
938 u16 datalen;
939 u16 flags;
940 u16 ntu;
941
942 /* pre-clean the event info */
943 memset(&e->desc, 0, sizeof(e->desc));
944
945 /* take the lock before we start messing with the ring */
946 mutex_lock(&hw->aq.arq_mutex);
947
948 if (hw->aq.arq.count == 0) {
949 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
950 "AQRX: Admin queue not initialized.\n");
951 ret_code = I40E_ERR_QUEUE_EMPTY;
952 goto clean_arq_element_err;
953 }
954
955 /* set next_to_use to head */
956 ntu = (rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK);
957 if (ntu == ntc) {
958 /* nothing to do - shouldn't need to update ring's values */
959 ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
960 goto clean_arq_element_out;
961 }
962
963 /* now clean the next descriptor */
964 desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
965 desc_idx = ntc;
966
967 hw->aq.arq_last_status =
968 (enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
969 flags = le16_to_cpu(desc->flags);
970 if (flags & I40E_AQ_FLAG_ERR) {
971 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
972 i40e_debug(hw,
973 I40E_DEBUG_AQ_MESSAGE,
974 "AQRX: Event received with error 0x%X.\n",
975 hw->aq.arq_last_status);
976 }
977
978 e->desc = *desc;
979 datalen = le16_to_cpu(desc->datalen);
980 e->msg_len = min(datalen, e->buf_len);
981 if (e->msg_buf != NULL && (e->msg_len != 0))
982 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
983 e->msg_len);
984
985 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
986 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
987 hw->aq.arq_buf_size);
988
989 /* Restore the original datalen and buffer address in the desc,
990 * FW updates datalen to indicate the event message
991 * size
992 */
993 bi = &hw->aq.arq.r.arq_bi[ntc];
994 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
995
996 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
997 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
998 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
999 desc->datalen = cpu_to_le16((u16)bi->size);
1000 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
1001 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
1002
1003 /* set tail = the last cleaned desc index. */
1004 wr32(hw, hw->aq.arq.tail, ntc);
1005 /* ntc is updated to tail + 1 */
1006 ntc++;
1007 if (ntc == hw->aq.num_arq_entries)
1008 ntc = 0;
1009 hw->aq.arq.next_to_clean = ntc;
1010 hw->aq.arq.next_to_use = ntu;
1011
1012 i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode));
1013clean_arq_element_out:
1014 /* Set pending if needed, unlock and return */
1015 if (pending)
1016 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
1017clean_arq_element_err:
1018 mutex_unlock(&hw->aq.arq_mutex);
1019
1020 return ret_code;
1021}
1022
1023static void i40e_resume_aq(struct i40e_hw *hw)
1024{
1025 /* Registers are reset after PF reset */
1026 hw->aq.asq.next_to_use = 0;
1027 hw->aq.asq.next_to_clean = 0;
1028
1029 i40e_config_asq_regs(hw);
1030
1031 hw->aq.arq.next_to_use = 0;
1032 hw->aq.arq.next_to_clean = 0;
1033
1034 i40e_config_arq_regs(hw);
1035}