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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// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4#include "i40e_status.h"
5#include "i40e_type.h"
6#include "i40e_register.h"
7#include "i40e_adminq.h"
8#include "i40e_prototype.h"
9
10static void i40e_resume_aq(struct i40e_hw *hw);
11
12/**
13 * i40e_adminq_init_regs - Initialize AdminQ registers
14 * @hw: pointer to the hardware structure
15 *
16 * This assumes the alloc_asq and alloc_arq functions have already been called
17 **/
18static void i40e_adminq_init_regs(struct i40e_hw *hw)
19{
20 /* set head and tail registers in our local struct */
21 if (i40e_is_vf(hw)) {
22 hw->aq.asq.tail = I40E_VF_ATQT1;
23 hw->aq.asq.head = I40E_VF_ATQH1;
24 hw->aq.asq.len = I40E_VF_ATQLEN1;
25 hw->aq.asq.bal = I40E_VF_ATQBAL1;
26 hw->aq.asq.bah = I40E_VF_ATQBAH1;
27 hw->aq.arq.tail = I40E_VF_ARQT1;
28 hw->aq.arq.head = I40E_VF_ARQH1;
29 hw->aq.arq.len = I40E_VF_ARQLEN1;
30 hw->aq.arq.bal = I40E_VF_ARQBAL1;
31 hw->aq.arq.bah = I40E_VF_ARQBAH1;
32 } else {
33 hw->aq.asq.tail = I40E_PF_ATQT;
34 hw->aq.asq.head = I40E_PF_ATQH;
35 hw->aq.asq.len = I40E_PF_ATQLEN;
36 hw->aq.asq.bal = I40E_PF_ATQBAL;
37 hw->aq.asq.bah = I40E_PF_ATQBAH;
38 hw->aq.arq.tail = I40E_PF_ARQT;
39 hw->aq.arq.head = I40E_PF_ARQH;
40 hw->aq.arq.len = I40E_PF_ARQLEN;
41 hw->aq.arq.bal = I40E_PF_ARQBAL;
42 hw->aq.arq.bah = I40E_PF_ARQBAH;
43 }
44}
45
46/**
47 * i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
48 * @hw: pointer to the hardware structure
49 **/
50static i40e_status i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
51{
52 i40e_status ret_code;
53
54 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
55 i40e_mem_atq_ring,
56 (hw->aq.num_asq_entries *
57 sizeof(struct i40e_aq_desc)),
58 I40E_ADMINQ_DESC_ALIGNMENT);
59 if (ret_code)
60 return ret_code;
61
62 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
63 (hw->aq.num_asq_entries *
64 sizeof(struct i40e_asq_cmd_details)));
65 if (ret_code) {
66 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
67 return ret_code;
68 }
69
70 return ret_code;
71}
72
73/**
74 * i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
75 * @hw: pointer to the hardware structure
76 **/
77static i40e_status i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
78{
79 i40e_status ret_code;
80
81 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
82 i40e_mem_arq_ring,
83 (hw->aq.num_arq_entries *
84 sizeof(struct i40e_aq_desc)),
85 I40E_ADMINQ_DESC_ALIGNMENT);
86
87 return ret_code;
88}
89
90/**
91 * i40e_free_adminq_asq - Free Admin Queue send rings
92 * @hw: pointer to the hardware structure
93 *
94 * This assumes the posted send buffers have already been cleaned
95 * and de-allocated
96 **/
97static void i40e_free_adminq_asq(struct i40e_hw *hw)
98{
99 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
100}
101
102/**
103 * i40e_free_adminq_arq - Free Admin Queue receive rings
104 * @hw: pointer to the hardware structure
105 *
106 * This assumes the posted receive buffers have already been cleaned
107 * and de-allocated
108 **/
109static void i40e_free_adminq_arq(struct i40e_hw *hw)
110{
111 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
112}
113
114/**
115 * i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
116 * @hw: pointer to the hardware structure
117 **/
118static i40e_status i40e_alloc_arq_bufs(struct i40e_hw *hw)
119{
120 i40e_status ret_code;
121 struct i40e_aq_desc *desc;
122 struct i40e_dma_mem *bi;
123 int i;
124
125 /* We'll be allocating the buffer info memory first, then we can
126 * allocate the mapped buffers for the event processing
127 */
128
129 /* buffer_info structures do not need alignment */
130 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
131 (hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
132 if (ret_code)
133 goto alloc_arq_bufs;
134 hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
135
136 /* allocate the mapped buffers */
137 for (i = 0; i < hw->aq.num_arq_entries; i++) {
138 bi = &hw->aq.arq.r.arq_bi[i];
139 ret_code = i40e_allocate_dma_mem(hw, bi,
140 i40e_mem_arq_buf,
141 hw->aq.arq_buf_size,
142 I40E_ADMINQ_DESC_ALIGNMENT);
143 if (ret_code)
144 goto unwind_alloc_arq_bufs;
145
146 /* now configure the descriptors for use */
147 desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
148
149 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
150 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
151 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
152 desc->opcode = 0;
153 /* This is in accordance with Admin queue design, there is no
154 * register for buffer size configuration
155 */
156 desc->datalen = cpu_to_le16((u16)bi->size);
157 desc->retval = 0;
158 desc->cookie_high = 0;
159 desc->cookie_low = 0;
160 desc->params.external.addr_high =
161 cpu_to_le32(upper_32_bits(bi->pa));
162 desc->params.external.addr_low =
163 cpu_to_le32(lower_32_bits(bi->pa));
164 desc->params.external.param0 = 0;
165 desc->params.external.param1 = 0;
166 }
167
168alloc_arq_bufs:
169 return ret_code;
170
171unwind_alloc_arq_bufs:
172 /* don't try to free the one that failed... */
173 i--;
174 for (; i >= 0; i--)
175 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
176 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
177
178 return ret_code;
179}
180
181/**
182 * i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
183 * @hw: pointer to the hardware structure
184 **/
185static i40e_status i40e_alloc_asq_bufs(struct i40e_hw *hw)
186{
187 i40e_status ret_code;
188 struct i40e_dma_mem *bi;
189 int i;
190
191 /* No mapped memory needed yet, just the buffer info structures */
192 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
193 (hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
194 if (ret_code)
195 goto alloc_asq_bufs;
196 hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
197
198 /* allocate the mapped buffers */
199 for (i = 0; i < hw->aq.num_asq_entries; i++) {
200 bi = &hw->aq.asq.r.asq_bi[i];
201 ret_code = i40e_allocate_dma_mem(hw, bi,
202 i40e_mem_asq_buf,
203 hw->aq.asq_buf_size,
204 I40E_ADMINQ_DESC_ALIGNMENT);
205 if (ret_code)
206 goto unwind_alloc_asq_bufs;
207 }
208alloc_asq_bufs:
209 return ret_code;
210
211unwind_alloc_asq_bufs:
212 /* don't try to free the one that failed... */
213 i--;
214 for (; i >= 0; i--)
215 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
216 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
217
218 return ret_code;
219}
220
221/**
222 * i40e_free_arq_bufs - Free receive queue buffer info elements
223 * @hw: pointer to the hardware structure
224 **/
225static void i40e_free_arq_bufs(struct i40e_hw *hw)
226{
227 int i;
228
229 /* free descriptors */
230 for (i = 0; i < hw->aq.num_arq_entries; i++)
231 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
232
233 /* free the descriptor memory */
234 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
235
236 /* free the dma header */
237 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
238}
239
240/**
241 * i40e_free_asq_bufs - Free send queue buffer info elements
242 * @hw: pointer to the hardware structure
243 **/
244static void i40e_free_asq_bufs(struct i40e_hw *hw)
245{
246 int i;
247
248 /* only unmap if the address is non-NULL */
249 for (i = 0; i < hw->aq.num_asq_entries; i++)
250 if (hw->aq.asq.r.asq_bi[i].pa)
251 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
252
253 /* free the buffer info list */
254 i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
255
256 /* free the descriptor memory */
257 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
258
259 /* free the dma header */
260 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
261}
262
263/**
264 * i40e_config_asq_regs - configure ASQ registers
265 * @hw: pointer to the hardware structure
266 *
267 * Configure base address and length registers for the transmit queue
268 **/
269static i40e_status i40e_config_asq_regs(struct i40e_hw *hw)
270{
271 i40e_status ret_code = 0;
272 u32 reg = 0;
273
274 /* Clear Head and Tail */
275 wr32(hw, hw->aq.asq.head, 0);
276 wr32(hw, hw->aq.asq.tail, 0);
277
278 /* set starting point */
279 wr32(hw, hw->aq.asq.len, (hw->aq.num_asq_entries |
280 I40E_PF_ATQLEN_ATQENABLE_MASK));
281 wr32(hw, hw->aq.asq.bal, lower_32_bits(hw->aq.asq.desc_buf.pa));
282 wr32(hw, hw->aq.asq.bah, upper_32_bits(hw->aq.asq.desc_buf.pa));
283
284 /* Check one register to verify that config was applied */
285 reg = rd32(hw, hw->aq.asq.bal);
286 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
287 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
288
289 return ret_code;
290}
291
292/**
293 * i40e_config_arq_regs - ARQ register configuration
294 * @hw: pointer to the hardware structure
295 *
296 * Configure base address and length registers for the receive (event queue)
297 **/
298static i40e_status i40e_config_arq_regs(struct i40e_hw *hw)
299{
300 i40e_status ret_code = 0;
301 u32 reg = 0;
302
303 /* Clear Head and Tail */
304 wr32(hw, hw->aq.arq.head, 0);
305 wr32(hw, hw->aq.arq.tail, 0);
306
307 /* set starting point */
308 wr32(hw, hw->aq.arq.len, (hw->aq.num_arq_entries |
309 I40E_PF_ARQLEN_ARQENABLE_MASK));
310 wr32(hw, hw->aq.arq.bal, lower_32_bits(hw->aq.arq.desc_buf.pa));
311 wr32(hw, hw->aq.arq.bah, upper_32_bits(hw->aq.arq.desc_buf.pa));
312
313 /* Update tail in the HW to post pre-allocated buffers */
314 wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
315
316 /* Check one register to verify that config was applied */
317 reg = rd32(hw, hw->aq.arq.bal);
318 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
319 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
320
321 return ret_code;
322}
323
324/**
325 * i40e_init_asq - main initialization routine for ASQ
326 * @hw: pointer to the hardware structure
327 *
328 * This is the main initialization routine for the Admin Send Queue
329 * Prior to calling this function, drivers *MUST* set the following fields
330 * in the hw->aq structure:
331 * - hw->aq.num_asq_entries
332 * - hw->aq.arq_buf_size
333 *
334 * Do *NOT* hold the lock when calling this as the memory allocation routines
335 * called are not going to be atomic context safe
336 **/
337static i40e_status i40e_init_asq(struct i40e_hw *hw)
338{
339 i40e_status ret_code = 0;
340
341 if (hw->aq.asq.count > 0) {
342 /* queue already initialized */
343 ret_code = I40E_ERR_NOT_READY;
344 goto init_adminq_exit;
345 }
346
347 /* verify input for valid configuration */
348 if ((hw->aq.num_asq_entries == 0) ||
349 (hw->aq.asq_buf_size == 0)) {
350 ret_code = I40E_ERR_CONFIG;
351 goto init_adminq_exit;
352 }
353
354 hw->aq.asq.next_to_use = 0;
355 hw->aq.asq.next_to_clean = 0;
356
357 /* allocate the ring memory */
358 ret_code = i40e_alloc_adminq_asq_ring(hw);
359 if (ret_code)
360 goto init_adminq_exit;
361
362 /* allocate buffers in the rings */
363 ret_code = i40e_alloc_asq_bufs(hw);
364 if (ret_code)
365 goto init_adminq_free_rings;
366
367 /* initialize base registers */
368 ret_code = i40e_config_asq_regs(hw);
369 if (ret_code)
370 goto init_adminq_free_rings;
371
372 /* success! */
373 hw->aq.asq.count = hw->aq.num_asq_entries;
374 goto init_adminq_exit;
375
376init_adminq_free_rings:
377 i40e_free_adminq_asq(hw);
378
379init_adminq_exit:
380 return ret_code;
381}
382
383/**
384 * i40e_init_arq - initialize ARQ
385 * @hw: pointer to the hardware structure
386 *
387 * The main initialization routine for the Admin Receive (Event) Queue.
388 * Prior to calling this function, drivers *MUST* set the following fields
389 * in the hw->aq structure:
390 * - hw->aq.num_asq_entries
391 * - hw->aq.arq_buf_size
392 *
393 * Do *NOT* hold the lock when calling this as the memory allocation routines
394 * called are not going to be atomic context safe
395 **/
396static i40e_status i40e_init_arq(struct i40e_hw *hw)
397{
398 i40e_status ret_code = 0;
399
400 if (hw->aq.arq.count > 0) {
401 /* queue already initialized */
402 ret_code = I40E_ERR_NOT_READY;
403 goto init_adminq_exit;
404 }
405
406 /* verify input for valid configuration */
407 if ((hw->aq.num_arq_entries == 0) ||
408 (hw->aq.arq_buf_size == 0)) {
409 ret_code = I40E_ERR_CONFIG;
410 goto init_adminq_exit;
411 }
412
413 hw->aq.arq.next_to_use = 0;
414 hw->aq.arq.next_to_clean = 0;
415
416 /* allocate the ring memory */
417 ret_code = i40e_alloc_adminq_arq_ring(hw);
418 if (ret_code)
419 goto init_adminq_exit;
420
421 /* allocate buffers in the rings */
422 ret_code = i40e_alloc_arq_bufs(hw);
423 if (ret_code)
424 goto init_adminq_free_rings;
425
426 /* initialize base registers */
427 ret_code = i40e_config_arq_regs(hw);
428 if (ret_code)
429 goto init_adminq_free_rings;
430
431 /* success! */
432 hw->aq.arq.count = hw->aq.num_arq_entries;
433 goto init_adminq_exit;
434
435init_adminq_free_rings:
436 i40e_free_adminq_arq(hw);
437
438init_adminq_exit:
439 return ret_code;
440}
441
442/**
443 * i40e_shutdown_asq - shutdown the ASQ
444 * @hw: pointer to the hardware structure
445 *
446 * The main shutdown routine for the Admin Send Queue
447 **/
448static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
449{
450 i40e_status ret_code = 0;
451
452 mutex_lock(&hw->aq.asq_mutex);
453
454 if (hw->aq.asq.count == 0) {
455 ret_code = I40E_ERR_NOT_READY;
456 goto shutdown_asq_out;
457 }
458
459 /* Stop firmware AdminQ processing */
460 wr32(hw, hw->aq.asq.head, 0);
461 wr32(hw, hw->aq.asq.tail, 0);
462 wr32(hw, hw->aq.asq.len, 0);
463 wr32(hw, hw->aq.asq.bal, 0);
464 wr32(hw, hw->aq.asq.bah, 0);
465
466 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
467
468 /* free ring buffers */
469 i40e_free_asq_bufs(hw);
470
471shutdown_asq_out:
472 mutex_unlock(&hw->aq.asq_mutex);
473 return ret_code;
474}
475
476/**
477 * i40e_shutdown_arq - shutdown ARQ
478 * @hw: pointer to the hardware structure
479 *
480 * The main shutdown routine for the Admin Receive Queue
481 **/
482static i40e_status i40e_shutdown_arq(struct i40e_hw *hw)
483{
484 i40e_status ret_code = 0;
485
486 mutex_lock(&hw->aq.arq_mutex);
487
488 if (hw->aq.arq.count == 0) {
489 ret_code = I40E_ERR_NOT_READY;
490 goto shutdown_arq_out;
491 }
492
493 /* Stop firmware AdminQ processing */
494 wr32(hw, hw->aq.arq.head, 0);
495 wr32(hw, hw->aq.arq.tail, 0);
496 wr32(hw, hw->aq.arq.len, 0);
497 wr32(hw, hw->aq.arq.bal, 0);
498 wr32(hw, hw->aq.arq.bah, 0);
499
500 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
501
502 /* free ring buffers */
503 i40e_free_arq_bufs(hw);
504
505shutdown_arq_out:
506 mutex_unlock(&hw->aq.arq_mutex);
507 return ret_code;
508}
509
510/**
511 * i40e_set_hw_flags - set HW flags
512 * @hw: pointer to the hardware structure
513 **/
514static void i40e_set_hw_flags(struct i40e_hw *hw)
515{
516 struct i40e_adminq_info *aq = &hw->aq;
517
518 hw->flags = 0;
519
520 switch (hw->mac.type) {
521 case I40E_MAC_XL710:
522 if (aq->api_maj_ver > 1 ||
523 (aq->api_maj_ver == 1 &&
524 aq->api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_XL710)) {
525 hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
526 hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
527 /* The ability to RX (not drop) 802.1ad frames */
528 hw->flags |= I40E_HW_FLAG_802_1AD_CAPABLE;
529 }
530 break;
531 case I40E_MAC_X722:
532 hw->flags |= I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE |
533 I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
534
535 if (aq->api_maj_ver > 1 ||
536 (aq->api_maj_ver == 1 &&
537 aq->api_min_ver >= I40E_MINOR_VER_FW_LLDP_STOPPABLE_X722))
538 hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
539
540 if (aq->api_maj_ver > 1 ||
541 (aq->api_maj_ver == 1 &&
542 aq->api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_X722))
543 hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
544 fallthrough;
545 default:
546 break;
547 }
548
549 /* Newer versions of firmware require lock when reading the NVM */
550 if (aq->api_maj_ver > 1 ||
551 (aq->api_maj_ver == 1 &&
552 aq->api_min_ver >= 5))
553 hw->flags |= I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
554
555 if (aq->api_maj_ver > 1 ||
556 (aq->api_maj_ver == 1 &&
557 aq->api_min_ver >= 8)) {
558 hw->flags |= I40E_HW_FLAG_FW_LLDP_PERSISTENT;
559 hw->flags |= I40E_HW_FLAG_DROP_MODE;
560 }
561
562 if (aq->api_maj_ver > 1 ||
563 (aq->api_maj_ver == 1 &&
564 aq->api_min_ver >= 9))
565 hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_EXTENDED;
566}
567
568/**
569 * i40e_init_adminq - main initialization routine for Admin Queue
570 * @hw: pointer to the hardware structure
571 *
572 * Prior to calling this function, drivers *MUST* set the following fields
573 * in the hw->aq structure:
574 * - hw->aq.num_asq_entries
575 * - hw->aq.num_arq_entries
576 * - hw->aq.arq_buf_size
577 * - hw->aq.asq_buf_size
578 **/
579i40e_status i40e_init_adminq(struct i40e_hw *hw)
580{
581 u16 cfg_ptr, oem_hi, oem_lo;
582 u16 eetrack_lo, eetrack_hi;
583 i40e_status ret_code;
584 int retry = 0;
585
586 /* verify input for valid configuration */
587 if ((hw->aq.num_arq_entries == 0) ||
588 (hw->aq.num_asq_entries == 0) ||
589 (hw->aq.arq_buf_size == 0) ||
590 (hw->aq.asq_buf_size == 0)) {
591 ret_code = I40E_ERR_CONFIG;
592 goto init_adminq_exit;
593 }
594
595 /* Set up register offsets */
596 i40e_adminq_init_regs(hw);
597
598 /* setup ASQ command write back timeout */
599 hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
600
601 /* allocate the ASQ */
602 ret_code = i40e_init_asq(hw);
603 if (ret_code)
604 goto init_adminq_destroy_locks;
605
606 /* allocate the ARQ */
607 ret_code = i40e_init_arq(hw);
608 if (ret_code)
609 goto init_adminq_free_asq;
610
611 /* There are some cases where the firmware may not be quite ready
612 * for AdminQ operations, so we retry the AdminQ setup a few times
613 * if we see timeouts in this first AQ call.
614 */
615 do {
616 ret_code = i40e_aq_get_firmware_version(hw,
617 &hw->aq.fw_maj_ver,
618 &hw->aq.fw_min_ver,
619 &hw->aq.fw_build,
620 &hw->aq.api_maj_ver,
621 &hw->aq.api_min_ver,
622 NULL);
623 if (ret_code != I40E_ERR_ADMIN_QUEUE_TIMEOUT)
624 break;
625 retry++;
626 msleep(100);
627 i40e_resume_aq(hw);
628 } while (retry < 10);
629 if (ret_code != I40E_SUCCESS)
630 goto init_adminq_free_arq;
631
632 /* Some features were introduced in different FW API version
633 * for different MAC type.
634 */
635 i40e_set_hw_flags(hw);
636
637 /* get the NVM version info */
638 i40e_read_nvm_word(hw, I40E_SR_NVM_DEV_STARTER_VERSION,
639 &hw->nvm.version);
640 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_LO, &eetrack_lo);
641 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_HI, &eetrack_hi);
642 hw->nvm.eetrack = (eetrack_hi << 16) | eetrack_lo;
643 i40e_read_nvm_word(hw, I40E_SR_BOOT_CONFIG_PTR, &cfg_ptr);
644 i40e_read_nvm_word(hw, (cfg_ptr + I40E_NVM_OEM_VER_OFF),
645 &oem_hi);
646 i40e_read_nvm_word(hw, (cfg_ptr + (I40E_NVM_OEM_VER_OFF + 1)),
647 &oem_lo);
648 hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
649
650 if (hw->mac.type == I40E_MAC_XL710 &&
651 hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
652 hw->aq.api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_XL710) {
653 hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
654 hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
655 }
656 if (hw->mac.type == I40E_MAC_X722 &&
657 hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
658 hw->aq.api_min_ver >= I40E_MINOR_VER_FW_LLDP_STOPPABLE_X722) {
659 hw->flags |= I40E_HW_FLAG_FW_LLDP_STOPPABLE;
660 }
661
662 /* The ability to RX (not drop) 802.1ad frames was added in API 1.7 */
663 if (hw->aq.api_maj_ver > 1 ||
664 (hw->aq.api_maj_ver == 1 &&
665 hw->aq.api_min_ver >= 7))
666 hw->flags |= I40E_HW_FLAG_802_1AD_CAPABLE;
667
668 if (hw->aq.api_maj_ver > I40E_FW_API_VERSION_MAJOR) {
669 ret_code = I40E_ERR_FIRMWARE_API_VERSION;
670 goto init_adminq_free_arq;
671 }
672
673 /* pre-emptive resource lock release */
674 i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
675 hw->nvm_release_on_done = false;
676 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
677
678 ret_code = 0;
679
680 /* success! */
681 goto init_adminq_exit;
682
683init_adminq_free_arq:
684 i40e_shutdown_arq(hw);
685init_adminq_free_asq:
686 i40e_shutdown_asq(hw);
687init_adminq_destroy_locks:
688
689init_adminq_exit:
690 return ret_code;
691}
692
693/**
694 * i40e_shutdown_adminq - shutdown routine for the Admin Queue
695 * @hw: pointer to the hardware structure
696 **/
697void i40e_shutdown_adminq(struct i40e_hw *hw)
698{
699 if (i40e_check_asq_alive(hw))
700 i40e_aq_queue_shutdown(hw, true);
701
702 i40e_shutdown_asq(hw);
703 i40e_shutdown_arq(hw);
704
705 if (hw->nvm_buff.va)
706 i40e_free_virt_mem(hw, &hw->nvm_buff);
707}
708
709/**
710 * i40e_clean_asq - cleans Admin send queue
711 * @hw: pointer to the hardware structure
712 *
713 * returns the number of free desc
714 **/
715static u16 i40e_clean_asq(struct i40e_hw *hw)
716{
717 struct i40e_adminq_ring *asq = &(hw->aq.asq);
718 struct i40e_asq_cmd_details *details;
719 u16 ntc = asq->next_to_clean;
720 struct i40e_aq_desc desc_cb;
721 struct i40e_aq_desc *desc;
722
723 desc = I40E_ADMINQ_DESC(*asq, ntc);
724 details = I40E_ADMINQ_DETAILS(*asq, ntc);
725 while (rd32(hw, hw->aq.asq.head) != ntc) {
726 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
727 "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
728
729 if (details->callback) {
730 I40E_ADMINQ_CALLBACK cb_func =
731 (I40E_ADMINQ_CALLBACK)details->callback;
732 desc_cb = *desc;
733 cb_func(hw, &desc_cb);
734 }
735 memset(desc, 0, sizeof(*desc));
736 memset(details, 0, sizeof(*details));
737 ntc++;
738 if (ntc == asq->count)
739 ntc = 0;
740 desc = I40E_ADMINQ_DESC(*asq, ntc);
741 details = I40E_ADMINQ_DETAILS(*asq, ntc);
742 }
743
744 asq->next_to_clean = ntc;
745
746 return I40E_DESC_UNUSED(asq);
747}
748
749/**
750 * i40e_asq_done - check if FW has processed the Admin Send Queue
751 * @hw: pointer to the hw struct
752 *
753 * Returns true if the firmware has processed all descriptors on the
754 * admin send queue. Returns false if there are still requests pending.
755 **/
756static bool i40e_asq_done(struct i40e_hw *hw)
757{
758 /* AQ designers suggest use of head for better
759 * timing reliability than DD bit
760 */
761 return rd32(hw, hw->aq.asq.head) == hw->aq.asq.next_to_use;
762
763}
764
765/**
766 * i40e_asq_send_command - send command to Admin Queue
767 * @hw: pointer to the hw struct
768 * @desc: prefilled descriptor describing the command (non DMA mem)
769 * @buff: buffer to use for indirect commands
770 * @buff_size: size of buffer for indirect commands
771 * @cmd_details: pointer to command details structure
772 *
773 * This is the main send command driver routine for the Admin Queue send
774 * queue. It runs the queue, cleans the queue, etc
775 **/
776i40e_status i40e_asq_send_command(struct i40e_hw *hw,
777 struct i40e_aq_desc *desc,
778 void *buff, /* can be NULL */
779 u16 buff_size,
780 struct i40e_asq_cmd_details *cmd_details)
781{
782 i40e_status status = 0;
783 struct i40e_dma_mem *dma_buff = NULL;
784 struct i40e_asq_cmd_details *details;
785 struct i40e_aq_desc *desc_on_ring;
786 bool cmd_completed = false;
787 u16 retval = 0;
788 u32 val = 0;
789
790 mutex_lock(&hw->aq.asq_mutex);
791
792 if (hw->aq.asq.count == 0) {
793 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
794 "AQTX: Admin queue not initialized.\n");
795 status = I40E_ERR_QUEUE_EMPTY;
796 goto asq_send_command_error;
797 }
798
799 hw->aq.asq_last_status = I40E_AQ_RC_OK;
800
801 val = rd32(hw, hw->aq.asq.head);
802 if (val >= hw->aq.num_asq_entries) {
803 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
804 "AQTX: head overrun at %d\n", val);
805 status = I40E_ERR_ADMIN_QUEUE_FULL;
806 goto asq_send_command_error;
807 }
808
809 details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
810 if (cmd_details) {
811 *details = *cmd_details;
812
813 /* If the cmd_details are defined copy the cookie. The
814 * cpu_to_le32 is not needed here because the data is ignored
815 * by the FW, only used by the driver
816 */
817 if (details->cookie) {
818 desc->cookie_high =
819 cpu_to_le32(upper_32_bits(details->cookie));
820 desc->cookie_low =
821 cpu_to_le32(lower_32_bits(details->cookie));
822 }
823 } else {
824 memset(details, 0, sizeof(struct i40e_asq_cmd_details));
825 }
826
827 /* clear requested flags and then set additional flags if defined */
828 desc->flags &= ~cpu_to_le16(details->flags_dis);
829 desc->flags |= cpu_to_le16(details->flags_ena);
830
831 if (buff_size > hw->aq.asq_buf_size) {
832 i40e_debug(hw,
833 I40E_DEBUG_AQ_MESSAGE,
834 "AQTX: Invalid buffer size: %d.\n",
835 buff_size);
836 status = I40E_ERR_INVALID_SIZE;
837 goto asq_send_command_error;
838 }
839
840 if (details->postpone && !details->async) {
841 i40e_debug(hw,
842 I40E_DEBUG_AQ_MESSAGE,
843 "AQTX: Async flag not set along with postpone flag");
844 status = I40E_ERR_PARAM;
845 goto asq_send_command_error;
846 }
847
848 /* call clean and check queue available function to reclaim the
849 * descriptors that were processed by FW, the function returns the
850 * number of desc available
851 */
852 /* the clean function called here could be called in a separate thread
853 * in case of asynchronous completions
854 */
855 if (i40e_clean_asq(hw) == 0) {
856 i40e_debug(hw,
857 I40E_DEBUG_AQ_MESSAGE,
858 "AQTX: Error queue is full.\n");
859 status = I40E_ERR_ADMIN_QUEUE_FULL;
860 goto asq_send_command_error;
861 }
862
863 /* initialize the temp desc pointer with the right desc */
864 desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
865
866 /* if the desc is available copy the temp desc to the right place */
867 *desc_on_ring = *desc;
868
869 /* if buff is not NULL assume indirect command */
870 if (buff != NULL) {
871 dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
872 /* copy the user buff into the respective DMA buff */
873 memcpy(dma_buff->va, buff, buff_size);
874 desc_on_ring->datalen = cpu_to_le16(buff_size);
875
876 /* Update the address values in the desc with the pa value
877 * for respective buffer
878 */
879 desc_on_ring->params.external.addr_high =
880 cpu_to_le32(upper_32_bits(dma_buff->pa));
881 desc_on_ring->params.external.addr_low =
882 cpu_to_le32(lower_32_bits(dma_buff->pa));
883 }
884
885 /* bump the tail */
886 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQTX: desc and buffer:\n");
887 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
888 buff, buff_size);
889 (hw->aq.asq.next_to_use)++;
890 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
891 hw->aq.asq.next_to_use = 0;
892 if (!details->postpone)
893 wr32(hw, hw->aq.asq.tail, hw->aq.asq.next_to_use);
894
895 /* if cmd_details are not defined or async flag is not set,
896 * we need to wait for desc write back
897 */
898 if (!details->async && !details->postpone) {
899 u32 total_delay = 0;
900
901 do {
902 /* AQ designers suggest use of head for better
903 * timing reliability than DD bit
904 */
905 if (i40e_asq_done(hw))
906 break;
907 udelay(50);
908 total_delay += 50;
909 } while (total_delay < hw->aq.asq_cmd_timeout);
910 }
911
912 /* if ready, copy the desc back to temp */
913 if (i40e_asq_done(hw)) {
914 *desc = *desc_on_ring;
915 if (buff != NULL)
916 memcpy(buff, dma_buff->va, buff_size);
917 retval = le16_to_cpu(desc->retval);
918 if (retval != 0) {
919 i40e_debug(hw,
920 I40E_DEBUG_AQ_MESSAGE,
921 "AQTX: Command completed with error 0x%X.\n",
922 retval);
923
924 /* strip off FW internal code */
925 retval &= 0xff;
926 }
927 cmd_completed = true;
928 if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
929 status = 0;
930 else if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_EBUSY)
931 status = I40E_ERR_NOT_READY;
932 else
933 status = I40E_ERR_ADMIN_QUEUE_ERROR;
934 hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
935 }
936
937 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND,
938 "AQTX: desc and buffer writeback:\n");
939 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
940
941 /* save writeback aq if requested */
942 if (details->wb_desc)
943 *details->wb_desc = *desc_on_ring;
944
945 /* update the error if time out occurred */
946 if ((!cmd_completed) &&
947 (!details->async && !details->postpone)) {
948 if (rd32(hw, hw->aq.asq.len) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
949 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
950 "AQTX: AQ Critical error.\n");
951 status = I40E_ERR_ADMIN_QUEUE_CRITICAL_ERROR;
952 } else {
953 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
954 "AQTX: Writeback timeout.\n");
955 status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
956 }
957 }
958
959asq_send_command_error:
960 mutex_unlock(&hw->aq.asq_mutex);
961 return status;
962}
963
964/**
965 * i40e_fill_default_direct_cmd_desc - AQ descriptor helper function
966 * @desc: pointer to the temp descriptor (non DMA mem)
967 * @opcode: the opcode can be used to decide which flags to turn off or on
968 *
969 * Fill the desc with default values
970 **/
971void i40e_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
972 u16 opcode)
973{
974 /* zero out the desc */
975 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
976 desc->opcode = cpu_to_le16(opcode);
977 desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
978}
979
980/**
981 * i40e_clean_arq_element
982 * @hw: pointer to the hw struct
983 * @e: event info from the receive descriptor, includes any buffers
984 * @pending: number of events that could be left to process
985 *
986 * This function cleans one Admin Receive Queue element and returns
987 * the contents through e. It can also return how many events are
988 * left to process through 'pending'
989 **/
990i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
991 struct i40e_arq_event_info *e,
992 u16 *pending)
993{
994 i40e_status ret_code = 0;
995 u16 ntc = hw->aq.arq.next_to_clean;
996 struct i40e_aq_desc *desc;
997 struct i40e_dma_mem *bi;
998 u16 desc_idx;
999 u16 datalen;
1000 u16 flags;
1001 u16 ntu;
1002
1003 /* pre-clean the event info */
1004 memset(&e->desc, 0, sizeof(e->desc));
1005
1006 /* take the lock before we start messing with the ring */
1007 mutex_lock(&hw->aq.arq_mutex);
1008
1009 if (hw->aq.arq.count == 0) {
1010 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
1011 "AQRX: Admin queue not initialized.\n");
1012 ret_code = I40E_ERR_QUEUE_EMPTY;
1013 goto clean_arq_element_err;
1014 }
1015
1016 /* set next_to_use to head */
1017 ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
1018 if (ntu == ntc) {
1019 /* nothing to do - shouldn't need to update ring's values */
1020 ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
1021 goto clean_arq_element_out;
1022 }
1023
1024 /* now clean the next descriptor */
1025 desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
1026 desc_idx = ntc;
1027
1028 hw->aq.arq_last_status =
1029 (enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
1030 flags = le16_to_cpu(desc->flags);
1031 if (flags & I40E_AQ_FLAG_ERR) {
1032 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
1033 i40e_debug(hw,
1034 I40E_DEBUG_AQ_MESSAGE,
1035 "AQRX: Event received with error 0x%X.\n",
1036 hw->aq.arq_last_status);
1037 }
1038
1039 e->desc = *desc;
1040 datalen = le16_to_cpu(desc->datalen);
1041 e->msg_len = min(datalen, e->buf_len);
1042 if (e->msg_buf != NULL && (e->msg_len != 0))
1043 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
1044 e->msg_len);
1045
1046 i40e_debug(hw, I40E_DEBUG_AQ_COMMAND, "AQRX: desc and buffer:\n");
1047 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
1048 hw->aq.arq_buf_size);
1049
1050 /* Restore the original datalen and buffer address in the desc,
1051 * FW updates datalen to indicate the event message
1052 * size
1053 */
1054 bi = &hw->aq.arq.r.arq_bi[ntc];
1055 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
1056
1057 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
1058 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
1059 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
1060 desc->datalen = cpu_to_le16((u16)bi->size);
1061 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
1062 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
1063
1064 /* set tail = the last cleaned desc index. */
1065 wr32(hw, hw->aq.arq.tail, ntc);
1066 /* ntc is updated to tail + 1 */
1067 ntc++;
1068 if (ntc == hw->aq.num_arq_entries)
1069 ntc = 0;
1070 hw->aq.arq.next_to_clean = ntc;
1071 hw->aq.arq.next_to_use = ntu;
1072
1073 i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode), &e->desc);
1074clean_arq_element_out:
1075 /* Set pending if needed, unlock and return */
1076 if (pending)
1077 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
1078clean_arq_element_err:
1079 mutex_unlock(&hw->aq.arq_mutex);
1080
1081 return ret_code;
1082}
1083
1084static void i40e_resume_aq(struct i40e_hw *hw)
1085{
1086 /* Registers are reset after PF reset */
1087 hw->aq.asq.next_to_use = 0;
1088 hw->aq.asq.next_to_clean = 0;
1089
1090 i40e_config_asq_regs(hw);
1091
1092 hw->aq.arq.next_to_use = 0;
1093 hw->aq.arq.next_to_clean = 0;
1094
1095 i40e_config_arq_regs(hw);
1096}