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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/*******************************************************************************
3 *
4 * Intel Ethernet Controller XL710 Family Linux Driver
5 * Copyright(c) 2013 - 2016 Intel Corporation.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program. If not, see <http://www.gnu.org/licenses/>.
18 *
19 * The full GNU General Public License is included in this distribution in
20 * the file called "COPYING".
21 *
22 * Contact Information:
23 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *
26 ******************************************************************************/
27
28#include "i40e_status.h"
29#include "i40e_type.h"
30#include "i40e_register.h"
31#include "i40e_adminq.h"
32#include "i40e_prototype.h"
33
34static void i40e_resume_aq(struct i40e_hw *hw);
35
36/**
37 * i40e_adminq_init_regs - Initialize AdminQ registers
38 * @hw: pointer to the hardware structure
39 *
40 * This assumes the alloc_asq and alloc_arq functions have already been called
41 **/
42static void i40e_adminq_init_regs(struct i40e_hw *hw)
43{
44 /* set head and tail registers in our local struct */
45 if (i40e_is_vf(hw)) {
46 hw->aq.asq.tail = I40E_VF_ATQT1;
47 hw->aq.asq.head = I40E_VF_ATQH1;
48 hw->aq.asq.len = I40E_VF_ATQLEN1;
49 hw->aq.asq.bal = I40E_VF_ATQBAL1;
50 hw->aq.asq.bah = I40E_VF_ATQBAH1;
51 hw->aq.arq.tail = I40E_VF_ARQT1;
52 hw->aq.arq.head = I40E_VF_ARQH1;
53 hw->aq.arq.len = I40E_VF_ARQLEN1;
54 hw->aq.arq.bal = I40E_VF_ARQBAL1;
55 hw->aq.arq.bah = I40E_VF_ARQBAH1;
56 } else {
57 hw->aq.asq.tail = I40E_PF_ATQT;
58 hw->aq.asq.head = I40E_PF_ATQH;
59 hw->aq.asq.len = I40E_PF_ATQLEN;
60 hw->aq.asq.bal = I40E_PF_ATQBAL;
61 hw->aq.asq.bah = I40E_PF_ATQBAH;
62 hw->aq.arq.tail = I40E_PF_ARQT;
63 hw->aq.arq.head = I40E_PF_ARQH;
64 hw->aq.arq.len = I40E_PF_ARQLEN;
65 hw->aq.arq.bal = I40E_PF_ARQBAL;
66 hw->aq.arq.bah = I40E_PF_ARQBAH;
67 }
68}
69
70/**
71 * i40e_alloc_adminq_asq_ring - Allocate Admin Queue send rings
72 * @hw: pointer to the hardware structure
73 **/
74static i40e_status i40e_alloc_adminq_asq_ring(struct i40e_hw *hw)
75{
76 i40e_status ret_code;
77
78 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.asq.desc_buf,
79 i40e_mem_atq_ring,
80 (hw->aq.num_asq_entries *
81 sizeof(struct i40e_aq_desc)),
82 I40E_ADMINQ_DESC_ALIGNMENT);
83 if (ret_code)
84 return ret_code;
85
86 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.cmd_buf,
87 (hw->aq.num_asq_entries *
88 sizeof(struct i40e_asq_cmd_details)));
89 if (ret_code) {
90 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
91 return ret_code;
92 }
93
94 return ret_code;
95}
96
97/**
98 * i40e_alloc_adminq_arq_ring - Allocate Admin Queue receive rings
99 * @hw: pointer to the hardware structure
100 **/
101static i40e_status i40e_alloc_adminq_arq_ring(struct i40e_hw *hw)
102{
103 i40e_status ret_code;
104
105 ret_code = i40e_allocate_dma_mem(hw, &hw->aq.arq.desc_buf,
106 i40e_mem_arq_ring,
107 (hw->aq.num_arq_entries *
108 sizeof(struct i40e_aq_desc)),
109 I40E_ADMINQ_DESC_ALIGNMENT);
110
111 return ret_code;
112}
113
114/**
115 * i40e_free_adminq_asq - Free Admin Queue send rings
116 * @hw: pointer to the hardware structure
117 *
118 * This assumes the posted send buffers have already been cleaned
119 * and de-allocated
120 **/
121static void i40e_free_adminq_asq(struct i40e_hw *hw)
122{
123 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
124}
125
126/**
127 * i40e_free_adminq_arq - Free Admin Queue receive rings
128 * @hw: pointer to the hardware structure
129 *
130 * This assumes the posted receive buffers have already been cleaned
131 * and de-allocated
132 **/
133static void i40e_free_adminq_arq(struct i40e_hw *hw)
134{
135 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
136}
137
138/**
139 * i40e_alloc_arq_bufs - Allocate pre-posted buffers for the receive queue
140 * @hw: pointer to the hardware structure
141 **/
142static i40e_status i40e_alloc_arq_bufs(struct i40e_hw *hw)
143{
144 i40e_status ret_code;
145 struct i40e_aq_desc *desc;
146 struct i40e_dma_mem *bi;
147 int i;
148
149 /* We'll be allocating the buffer info memory first, then we can
150 * allocate the mapped buffers for the event processing
151 */
152
153 /* buffer_info structures do not need alignment */
154 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.arq.dma_head,
155 (hw->aq.num_arq_entries * sizeof(struct i40e_dma_mem)));
156 if (ret_code)
157 goto alloc_arq_bufs;
158 hw->aq.arq.r.arq_bi = (struct i40e_dma_mem *)hw->aq.arq.dma_head.va;
159
160 /* allocate the mapped buffers */
161 for (i = 0; i < hw->aq.num_arq_entries; i++) {
162 bi = &hw->aq.arq.r.arq_bi[i];
163 ret_code = i40e_allocate_dma_mem(hw, bi,
164 i40e_mem_arq_buf,
165 hw->aq.arq_buf_size,
166 I40E_ADMINQ_DESC_ALIGNMENT);
167 if (ret_code)
168 goto unwind_alloc_arq_bufs;
169
170 /* now configure the descriptors for use */
171 desc = I40E_ADMINQ_DESC(hw->aq.arq, i);
172
173 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
174 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
175 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
176 desc->opcode = 0;
177 /* This is in accordance with Admin queue design, there is no
178 * register for buffer size configuration
179 */
180 desc->datalen = cpu_to_le16((u16)bi->size);
181 desc->retval = 0;
182 desc->cookie_high = 0;
183 desc->cookie_low = 0;
184 desc->params.external.addr_high =
185 cpu_to_le32(upper_32_bits(bi->pa));
186 desc->params.external.addr_low =
187 cpu_to_le32(lower_32_bits(bi->pa));
188 desc->params.external.param0 = 0;
189 desc->params.external.param1 = 0;
190 }
191
192alloc_arq_bufs:
193 return ret_code;
194
195unwind_alloc_arq_bufs:
196 /* don't try to free the one that failed... */
197 i--;
198 for (; i >= 0; i--)
199 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
200 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
201
202 return ret_code;
203}
204
205/**
206 * i40e_alloc_asq_bufs - Allocate empty buffer structs for the send queue
207 * @hw: pointer to the hardware structure
208 **/
209static i40e_status i40e_alloc_asq_bufs(struct i40e_hw *hw)
210{
211 i40e_status ret_code;
212 struct i40e_dma_mem *bi;
213 int i;
214
215 /* No mapped memory needed yet, just the buffer info structures */
216 ret_code = i40e_allocate_virt_mem(hw, &hw->aq.asq.dma_head,
217 (hw->aq.num_asq_entries * sizeof(struct i40e_dma_mem)));
218 if (ret_code)
219 goto alloc_asq_bufs;
220 hw->aq.asq.r.asq_bi = (struct i40e_dma_mem *)hw->aq.asq.dma_head.va;
221
222 /* allocate the mapped buffers */
223 for (i = 0; i < hw->aq.num_asq_entries; i++) {
224 bi = &hw->aq.asq.r.asq_bi[i];
225 ret_code = i40e_allocate_dma_mem(hw, bi,
226 i40e_mem_asq_buf,
227 hw->aq.asq_buf_size,
228 I40E_ADMINQ_DESC_ALIGNMENT);
229 if (ret_code)
230 goto unwind_alloc_asq_bufs;
231 }
232alloc_asq_bufs:
233 return ret_code;
234
235unwind_alloc_asq_bufs:
236 /* don't try to free the one that failed... */
237 i--;
238 for (; i >= 0; i--)
239 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
240 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
241
242 return ret_code;
243}
244
245/**
246 * i40e_free_arq_bufs - Free receive queue buffer info elements
247 * @hw: pointer to the hardware structure
248 **/
249static void i40e_free_arq_bufs(struct i40e_hw *hw)
250{
251 int i;
252
253 /* free descriptors */
254 for (i = 0; i < hw->aq.num_arq_entries; i++)
255 i40e_free_dma_mem(hw, &hw->aq.arq.r.arq_bi[i]);
256
257 /* free the descriptor memory */
258 i40e_free_dma_mem(hw, &hw->aq.arq.desc_buf);
259
260 /* free the dma header */
261 i40e_free_virt_mem(hw, &hw->aq.arq.dma_head);
262}
263
264/**
265 * i40e_free_asq_bufs - Free send queue buffer info elements
266 * @hw: pointer to the hardware structure
267 **/
268static void i40e_free_asq_bufs(struct i40e_hw *hw)
269{
270 int i;
271
272 /* only unmap if the address is non-NULL */
273 for (i = 0; i < hw->aq.num_asq_entries; i++)
274 if (hw->aq.asq.r.asq_bi[i].pa)
275 i40e_free_dma_mem(hw, &hw->aq.asq.r.asq_bi[i]);
276
277 /* free the buffer info list */
278 i40e_free_virt_mem(hw, &hw->aq.asq.cmd_buf);
279
280 /* free the descriptor memory */
281 i40e_free_dma_mem(hw, &hw->aq.asq.desc_buf);
282
283 /* free the dma header */
284 i40e_free_virt_mem(hw, &hw->aq.asq.dma_head);
285}
286
287/**
288 * i40e_config_asq_regs - configure ASQ registers
289 * @hw: pointer to the hardware structure
290 *
291 * Configure base address and length registers for the transmit queue
292 **/
293static i40e_status i40e_config_asq_regs(struct i40e_hw *hw)
294{
295 i40e_status ret_code = 0;
296 u32 reg = 0;
297
298 /* Clear Head and Tail */
299 wr32(hw, hw->aq.asq.head, 0);
300 wr32(hw, hw->aq.asq.tail, 0);
301
302 /* set starting point */
303 wr32(hw, hw->aq.asq.len, (hw->aq.num_asq_entries |
304 I40E_PF_ATQLEN_ATQENABLE_MASK));
305 wr32(hw, hw->aq.asq.bal, lower_32_bits(hw->aq.asq.desc_buf.pa));
306 wr32(hw, hw->aq.asq.bah, upper_32_bits(hw->aq.asq.desc_buf.pa));
307
308 /* Check one register to verify that config was applied */
309 reg = rd32(hw, hw->aq.asq.bal);
310 if (reg != lower_32_bits(hw->aq.asq.desc_buf.pa))
311 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
312
313 return ret_code;
314}
315
316/**
317 * i40e_config_arq_regs - ARQ register configuration
318 * @hw: pointer to the hardware structure
319 *
320 * Configure base address and length registers for the receive (event queue)
321 **/
322static i40e_status i40e_config_arq_regs(struct i40e_hw *hw)
323{
324 i40e_status ret_code = 0;
325 u32 reg = 0;
326
327 /* Clear Head and Tail */
328 wr32(hw, hw->aq.arq.head, 0);
329 wr32(hw, hw->aq.arq.tail, 0);
330
331 /* set starting point */
332 wr32(hw, hw->aq.arq.len, (hw->aq.num_arq_entries |
333 I40E_PF_ARQLEN_ARQENABLE_MASK));
334 wr32(hw, hw->aq.arq.bal, lower_32_bits(hw->aq.arq.desc_buf.pa));
335 wr32(hw, hw->aq.arq.bah, upper_32_bits(hw->aq.arq.desc_buf.pa));
336
337 /* Update tail in the HW to post pre-allocated buffers */
338 wr32(hw, hw->aq.arq.tail, hw->aq.num_arq_entries - 1);
339
340 /* Check one register to verify that config was applied */
341 reg = rd32(hw, hw->aq.arq.bal);
342 if (reg != lower_32_bits(hw->aq.arq.desc_buf.pa))
343 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
344
345 return ret_code;
346}
347
348/**
349 * i40e_init_asq - main initialization routine for ASQ
350 * @hw: pointer to the hardware structure
351 *
352 * This is the main initialization routine for the Admin Send Queue
353 * Prior to calling this function, drivers *MUST* set the following fields
354 * in the hw->aq structure:
355 * - hw->aq.num_asq_entries
356 * - hw->aq.arq_buf_size
357 *
358 * Do *NOT* hold the lock when calling this as the memory allocation routines
359 * called are not going to be atomic context safe
360 **/
361static i40e_status i40e_init_asq(struct i40e_hw *hw)
362{
363 i40e_status ret_code = 0;
364
365 if (hw->aq.asq.count > 0) {
366 /* queue already initialized */
367 ret_code = I40E_ERR_NOT_READY;
368 goto init_adminq_exit;
369 }
370
371 /* verify input for valid configuration */
372 if ((hw->aq.num_asq_entries == 0) ||
373 (hw->aq.asq_buf_size == 0)) {
374 ret_code = I40E_ERR_CONFIG;
375 goto init_adminq_exit;
376 }
377
378 hw->aq.asq.next_to_use = 0;
379 hw->aq.asq.next_to_clean = 0;
380
381 /* allocate the ring memory */
382 ret_code = i40e_alloc_adminq_asq_ring(hw);
383 if (ret_code)
384 goto init_adminq_exit;
385
386 /* allocate buffers in the rings */
387 ret_code = i40e_alloc_asq_bufs(hw);
388 if (ret_code)
389 goto init_adminq_free_rings;
390
391 /* initialize base registers */
392 ret_code = i40e_config_asq_regs(hw);
393 if (ret_code)
394 goto init_adminq_free_rings;
395
396 /* success! */
397 hw->aq.asq.count = hw->aq.num_asq_entries;
398 goto init_adminq_exit;
399
400init_adminq_free_rings:
401 i40e_free_adminq_asq(hw);
402
403init_adminq_exit:
404 return ret_code;
405}
406
407/**
408 * i40e_init_arq - initialize ARQ
409 * @hw: pointer to the hardware structure
410 *
411 * The main initialization routine for the Admin Receive (Event) Queue.
412 * Prior to calling this function, drivers *MUST* set the following fields
413 * in the hw->aq structure:
414 * - hw->aq.num_asq_entries
415 * - hw->aq.arq_buf_size
416 *
417 * Do *NOT* hold the lock when calling this as the memory allocation routines
418 * called are not going to be atomic context safe
419 **/
420static i40e_status i40e_init_arq(struct i40e_hw *hw)
421{
422 i40e_status ret_code = 0;
423
424 if (hw->aq.arq.count > 0) {
425 /* queue already initialized */
426 ret_code = I40E_ERR_NOT_READY;
427 goto init_adminq_exit;
428 }
429
430 /* verify input for valid configuration */
431 if ((hw->aq.num_arq_entries == 0) ||
432 (hw->aq.arq_buf_size == 0)) {
433 ret_code = I40E_ERR_CONFIG;
434 goto init_adminq_exit;
435 }
436
437 hw->aq.arq.next_to_use = 0;
438 hw->aq.arq.next_to_clean = 0;
439
440 /* allocate the ring memory */
441 ret_code = i40e_alloc_adminq_arq_ring(hw);
442 if (ret_code)
443 goto init_adminq_exit;
444
445 /* allocate buffers in the rings */
446 ret_code = i40e_alloc_arq_bufs(hw);
447 if (ret_code)
448 goto init_adminq_free_rings;
449
450 /* initialize base registers */
451 ret_code = i40e_config_arq_regs(hw);
452 if (ret_code)
453 goto init_adminq_free_rings;
454
455 /* success! */
456 hw->aq.arq.count = hw->aq.num_arq_entries;
457 goto init_adminq_exit;
458
459init_adminq_free_rings:
460 i40e_free_adminq_arq(hw);
461
462init_adminq_exit:
463 return ret_code;
464}
465
466/**
467 * i40e_shutdown_asq - shutdown the ASQ
468 * @hw: pointer to the hardware structure
469 *
470 * The main shutdown routine for the Admin Send Queue
471 **/
472static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
473{
474 i40e_status ret_code = 0;
475
476 mutex_lock(&hw->aq.asq_mutex);
477
478 if (hw->aq.asq.count == 0) {
479 ret_code = I40E_ERR_NOT_READY;
480 goto shutdown_asq_out;
481 }
482
483 /* Stop firmware AdminQ processing */
484 wr32(hw, hw->aq.asq.head, 0);
485 wr32(hw, hw->aq.asq.tail, 0);
486 wr32(hw, hw->aq.asq.len, 0);
487 wr32(hw, hw->aq.asq.bal, 0);
488 wr32(hw, hw->aq.asq.bah, 0);
489
490 hw->aq.asq.count = 0; /* to indicate uninitialized queue */
491
492 /* free ring buffers */
493 i40e_free_asq_bufs(hw);
494
495shutdown_asq_out:
496 mutex_unlock(&hw->aq.asq_mutex);
497 return ret_code;
498}
499
500/**
501 * i40e_shutdown_arq - shutdown ARQ
502 * @hw: pointer to the hardware structure
503 *
504 * The main shutdown routine for the Admin Receive Queue
505 **/
506static i40e_status i40e_shutdown_arq(struct i40e_hw *hw)
507{
508 i40e_status ret_code = 0;
509
510 mutex_lock(&hw->aq.arq_mutex);
511
512 if (hw->aq.arq.count == 0) {
513 ret_code = I40E_ERR_NOT_READY;
514 goto shutdown_arq_out;
515 }
516
517 /* Stop firmware AdminQ processing */
518 wr32(hw, hw->aq.arq.head, 0);
519 wr32(hw, hw->aq.arq.tail, 0);
520 wr32(hw, hw->aq.arq.len, 0);
521 wr32(hw, hw->aq.arq.bal, 0);
522 wr32(hw, hw->aq.arq.bah, 0);
523
524 hw->aq.arq.count = 0; /* to indicate uninitialized queue */
525
526 /* free ring buffers */
527 i40e_free_arq_bufs(hw);
528
529shutdown_arq_out:
530 mutex_unlock(&hw->aq.arq_mutex);
531 return ret_code;
532}
533
534/**
535 * i40e_init_adminq - main initialization routine for Admin Queue
536 * @hw: pointer to the hardware structure
537 *
538 * Prior to calling this function, drivers *MUST* set the following fields
539 * in the hw->aq structure:
540 * - hw->aq.num_asq_entries
541 * - hw->aq.num_arq_entries
542 * - hw->aq.arq_buf_size
543 * - hw->aq.asq_buf_size
544 **/
545i40e_status i40e_init_adminq(struct i40e_hw *hw)
546{
547 u16 cfg_ptr, oem_hi, oem_lo;
548 u16 eetrack_lo, eetrack_hi;
549 i40e_status ret_code;
550 int retry = 0;
551
552 /* verify input for valid configuration */
553 if ((hw->aq.num_arq_entries == 0) ||
554 (hw->aq.num_asq_entries == 0) ||
555 (hw->aq.arq_buf_size == 0) ||
556 (hw->aq.asq_buf_size == 0)) {
557 ret_code = I40E_ERR_CONFIG;
558 goto init_adminq_exit;
559 }
560
561 /* Set up register offsets */
562 i40e_adminq_init_regs(hw);
563
564 /* setup ASQ command write back timeout */
565 hw->aq.asq_cmd_timeout = I40E_ASQ_CMD_TIMEOUT;
566
567 /* allocate the ASQ */
568 ret_code = i40e_init_asq(hw);
569 if (ret_code)
570 goto init_adminq_destroy_locks;
571
572 /* allocate the ARQ */
573 ret_code = i40e_init_arq(hw);
574 if (ret_code)
575 goto init_adminq_free_asq;
576
577 /* There are some cases where the firmware may not be quite ready
578 * for AdminQ operations, so we retry the AdminQ setup a few times
579 * if we see timeouts in this first AQ call.
580 */
581 do {
582 ret_code = i40e_aq_get_firmware_version(hw,
583 &hw->aq.fw_maj_ver,
584 &hw->aq.fw_min_ver,
585 &hw->aq.fw_build,
586 &hw->aq.api_maj_ver,
587 &hw->aq.api_min_ver,
588 NULL);
589 if (ret_code != I40E_ERR_ADMIN_QUEUE_TIMEOUT)
590 break;
591 retry++;
592 msleep(100);
593 i40e_resume_aq(hw);
594 } while (retry < 10);
595 if (ret_code != I40E_SUCCESS)
596 goto init_adminq_free_arq;
597
598 /* get the NVM version info */
599 i40e_read_nvm_word(hw, I40E_SR_NVM_DEV_STARTER_VERSION,
600 &hw->nvm.version);
601 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_LO, &eetrack_lo);
602 i40e_read_nvm_word(hw, I40E_SR_NVM_EETRACK_HI, &eetrack_hi);
603 hw->nvm.eetrack = (eetrack_hi << 16) | eetrack_lo;
604 i40e_read_nvm_word(hw, I40E_SR_BOOT_CONFIG_PTR, &cfg_ptr);
605 i40e_read_nvm_word(hw, (cfg_ptr + I40E_NVM_OEM_VER_OFF),
606 &oem_hi);
607 i40e_read_nvm_word(hw, (cfg_ptr + (I40E_NVM_OEM_VER_OFF + 1)),
608 &oem_lo);
609 hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
610
611 if (hw->mac.type == I40E_MAC_XL710 &&
612 hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
613 hw->aq.api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_XL710) {
614 hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
615 }
616
617 /* Newer versions of firmware require lock when reading the NVM */
618 if (hw->aq.api_maj_ver > 1 ||
619 (hw->aq.api_maj_ver == 1 &&
620 hw->aq.api_min_ver >= 5))
621 hw->flags |= I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
622
623 /* The ability to RX (not drop) 802.1ad frames was added in API 1.7 */
624 if (hw->aq.api_maj_ver > 1 ||
625 (hw->aq.api_maj_ver == 1 &&
626 hw->aq.api_min_ver >= 7))
627 hw->flags |= I40E_HW_FLAG_802_1AD_CAPABLE;
628
629 if (hw->aq.api_maj_ver > I40E_FW_API_VERSION_MAJOR) {
630 ret_code = I40E_ERR_FIRMWARE_API_VERSION;
631 goto init_adminq_free_arq;
632 }
633
634 /* pre-emptive resource lock release */
635 i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
636 hw->nvm_release_on_done = false;
637 hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
638
639 ret_code = 0;
640
641 /* success! */
642 goto init_adminq_exit;
643
644init_adminq_free_arq:
645 i40e_shutdown_arq(hw);
646init_adminq_free_asq:
647 i40e_shutdown_asq(hw);
648init_adminq_destroy_locks:
649
650init_adminq_exit:
651 return ret_code;
652}
653
654/**
655 * i40e_shutdown_adminq - shutdown routine for the Admin Queue
656 * @hw: pointer to the hardware structure
657 **/
658i40e_status i40e_shutdown_adminq(struct i40e_hw *hw)
659{
660 i40e_status ret_code = 0;
661
662 if (i40e_check_asq_alive(hw))
663 i40e_aq_queue_shutdown(hw, true);
664
665 i40e_shutdown_asq(hw);
666 i40e_shutdown_arq(hw);
667
668 if (hw->nvm_buff.va)
669 i40e_free_virt_mem(hw, &hw->nvm_buff);
670
671 return ret_code;
672}
673
674/**
675 * i40e_clean_asq - cleans Admin send queue
676 * @hw: pointer to the hardware structure
677 *
678 * returns the number of free desc
679 **/
680static u16 i40e_clean_asq(struct i40e_hw *hw)
681{
682 struct i40e_adminq_ring *asq = &(hw->aq.asq);
683 struct i40e_asq_cmd_details *details;
684 u16 ntc = asq->next_to_clean;
685 struct i40e_aq_desc desc_cb;
686 struct i40e_aq_desc *desc;
687
688 desc = I40E_ADMINQ_DESC(*asq, ntc);
689 details = I40E_ADMINQ_DETAILS(*asq, ntc);
690 while (rd32(hw, hw->aq.asq.head) != ntc) {
691 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
692 "ntc %d head %d.\n", ntc, rd32(hw, hw->aq.asq.head));
693
694 if (details->callback) {
695 I40E_ADMINQ_CALLBACK cb_func =
696 (I40E_ADMINQ_CALLBACK)details->callback;
697 desc_cb = *desc;
698 cb_func(hw, &desc_cb);
699 }
700 memset(desc, 0, sizeof(*desc));
701 memset(details, 0, sizeof(*details));
702 ntc++;
703 if (ntc == asq->count)
704 ntc = 0;
705 desc = I40E_ADMINQ_DESC(*asq, ntc);
706 details = I40E_ADMINQ_DETAILS(*asq, ntc);
707 }
708
709 asq->next_to_clean = ntc;
710
711 return I40E_DESC_UNUSED(asq);
712}
713
714/**
715 * i40e_asq_done - check if FW has processed the Admin Send Queue
716 * @hw: pointer to the hw struct
717 *
718 * Returns true if the firmware has processed all descriptors on the
719 * admin send queue. Returns false if there are still requests pending.
720 **/
721static bool i40e_asq_done(struct i40e_hw *hw)
722{
723 /* AQ designers suggest use of head for better
724 * timing reliability than DD bit
725 */
726 return rd32(hw, hw->aq.asq.head) == hw->aq.asq.next_to_use;
727
728}
729
730/**
731 * i40e_asq_send_command - send command to Admin Queue
732 * @hw: pointer to the hw struct
733 * @desc: prefilled descriptor describing the command (non DMA mem)
734 * @buff: buffer to use for indirect commands
735 * @buff_size: size of buffer for indirect commands
736 * @cmd_details: pointer to command details structure
737 *
738 * This is the main send command driver routine for the Admin Queue send
739 * queue. It runs the queue, cleans the queue, etc
740 **/
741i40e_status i40e_asq_send_command(struct i40e_hw *hw,
742 struct i40e_aq_desc *desc,
743 void *buff, /* can be NULL */
744 u16 buff_size,
745 struct i40e_asq_cmd_details *cmd_details)
746{
747 i40e_status status = 0;
748 struct i40e_dma_mem *dma_buff = NULL;
749 struct i40e_asq_cmd_details *details;
750 struct i40e_aq_desc *desc_on_ring;
751 bool cmd_completed = false;
752 u16 retval = 0;
753 u32 val = 0;
754
755 mutex_lock(&hw->aq.asq_mutex);
756
757 if (hw->aq.asq.count == 0) {
758 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
759 "AQTX: Admin queue not initialized.\n");
760 status = I40E_ERR_QUEUE_EMPTY;
761 goto asq_send_command_error;
762 }
763
764 hw->aq.asq_last_status = I40E_AQ_RC_OK;
765
766 val = rd32(hw, hw->aq.asq.head);
767 if (val >= hw->aq.num_asq_entries) {
768 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
769 "AQTX: head overrun at %d\n", val);
770 status = I40E_ERR_QUEUE_EMPTY;
771 goto asq_send_command_error;
772 }
773
774 details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
775 if (cmd_details) {
776 *details = *cmd_details;
777
778 /* If the cmd_details are defined copy the cookie. The
779 * cpu_to_le32 is not needed here because the data is ignored
780 * by the FW, only used by the driver
781 */
782 if (details->cookie) {
783 desc->cookie_high =
784 cpu_to_le32(upper_32_bits(details->cookie));
785 desc->cookie_low =
786 cpu_to_le32(lower_32_bits(details->cookie));
787 }
788 } else {
789 memset(details, 0, sizeof(struct i40e_asq_cmd_details));
790 }
791
792 /* clear requested flags and then set additional flags if defined */
793 desc->flags &= ~cpu_to_le16(details->flags_dis);
794 desc->flags |= cpu_to_le16(details->flags_ena);
795
796 if (buff_size > hw->aq.asq_buf_size) {
797 i40e_debug(hw,
798 I40E_DEBUG_AQ_MESSAGE,
799 "AQTX: Invalid buffer size: %d.\n",
800 buff_size);
801 status = I40E_ERR_INVALID_SIZE;
802 goto asq_send_command_error;
803 }
804
805 if (details->postpone && !details->async) {
806 i40e_debug(hw,
807 I40E_DEBUG_AQ_MESSAGE,
808 "AQTX: Async flag not set along with postpone flag");
809 status = I40E_ERR_PARAM;
810 goto asq_send_command_error;
811 }
812
813 /* call clean and check queue available function to reclaim the
814 * descriptors that were processed by FW, the function returns the
815 * number of desc available
816 */
817 /* the clean function called here could be called in a separate thread
818 * in case of asynchronous completions
819 */
820 if (i40e_clean_asq(hw) == 0) {
821 i40e_debug(hw,
822 I40E_DEBUG_AQ_MESSAGE,
823 "AQTX: Error queue is full.\n");
824 status = I40E_ERR_ADMIN_QUEUE_FULL;
825 goto asq_send_command_error;
826 }
827
828 /* initialize the temp desc pointer with the right desc */
829 desc_on_ring = I40E_ADMINQ_DESC(hw->aq.asq, hw->aq.asq.next_to_use);
830
831 /* if the desc is available copy the temp desc to the right place */
832 *desc_on_ring = *desc;
833
834 /* if buff is not NULL assume indirect command */
835 if (buff != NULL) {
836 dma_buff = &(hw->aq.asq.r.asq_bi[hw->aq.asq.next_to_use]);
837 /* copy the user buff into the respective DMA buff */
838 memcpy(dma_buff->va, buff, buff_size);
839 desc_on_ring->datalen = cpu_to_le16(buff_size);
840
841 /* Update the address values in the desc with the pa value
842 * for respective buffer
843 */
844 desc_on_ring->params.external.addr_high =
845 cpu_to_le32(upper_32_bits(dma_buff->pa));
846 desc_on_ring->params.external.addr_low =
847 cpu_to_le32(lower_32_bits(dma_buff->pa));
848 }
849
850 /* bump the tail */
851 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQTX: desc and buffer:\n");
852 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc_on_ring,
853 buff, buff_size);
854 (hw->aq.asq.next_to_use)++;
855 if (hw->aq.asq.next_to_use == hw->aq.asq.count)
856 hw->aq.asq.next_to_use = 0;
857 if (!details->postpone)
858 wr32(hw, hw->aq.asq.tail, hw->aq.asq.next_to_use);
859
860 /* if cmd_details are not defined or async flag is not set,
861 * we need to wait for desc write back
862 */
863 if (!details->async && !details->postpone) {
864 u32 total_delay = 0;
865
866 do {
867 /* AQ designers suggest use of head for better
868 * timing reliability than DD bit
869 */
870 if (i40e_asq_done(hw))
871 break;
872 udelay(50);
873 total_delay += 50;
874 } while (total_delay < hw->aq.asq_cmd_timeout);
875 }
876
877 /* if ready, copy the desc back to temp */
878 if (i40e_asq_done(hw)) {
879 *desc = *desc_on_ring;
880 if (buff != NULL)
881 memcpy(buff, dma_buff->va, buff_size);
882 retval = le16_to_cpu(desc->retval);
883 if (retval != 0) {
884 i40e_debug(hw,
885 I40E_DEBUG_AQ_MESSAGE,
886 "AQTX: Command completed with error 0x%X.\n",
887 retval);
888
889 /* strip off FW internal code */
890 retval &= 0xff;
891 }
892 cmd_completed = true;
893 if ((enum i40e_admin_queue_err)retval == I40E_AQ_RC_OK)
894 status = 0;
895 else
896 status = I40E_ERR_ADMIN_QUEUE_ERROR;
897 hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
898 }
899
900 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
901 "AQTX: desc and buffer writeback:\n");
902 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff, buff_size);
903
904 /* save writeback aq if requested */
905 if (details->wb_desc)
906 *details->wb_desc = *desc_on_ring;
907
908 /* update the error if time out occurred */
909 if ((!cmd_completed) &&
910 (!details->async && !details->postpone)) {
911 if (rd32(hw, hw->aq.asq.len) & I40E_GL_ATQLEN_ATQCRIT_MASK) {
912 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
913 "AQTX: AQ Critical error.\n");
914 status = I40E_ERR_ADMIN_QUEUE_CRITICAL_ERROR;
915 } else {
916 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
917 "AQTX: Writeback timeout.\n");
918 status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
919 }
920 }
921
922asq_send_command_error:
923 mutex_unlock(&hw->aq.asq_mutex);
924 return status;
925}
926
927/**
928 * i40e_fill_default_direct_cmd_desc - AQ descriptor helper function
929 * @desc: pointer to the temp descriptor (non DMA mem)
930 * @opcode: the opcode can be used to decide which flags to turn off or on
931 *
932 * Fill the desc with default values
933 **/
934void i40e_fill_default_direct_cmd_desc(struct i40e_aq_desc *desc,
935 u16 opcode)
936{
937 /* zero out the desc */
938 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
939 desc->opcode = cpu_to_le16(opcode);
940 desc->flags = cpu_to_le16(I40E_AQ_FLAG_SI);
941}
942
943/**
944 * i40e_clean_arq_element
945 * @hw: pointer to the hw struct
946 * @e: event info from the receive descriptor, includes any buffers
947 * @pending: number of events that could be left to process
948 *
949 * This function cleans one Admin Receive Queue element and returns
950 * the contents through e. It can also return how many events are
951 * left to process through 'pending'
952 **/
953i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
954 struct i40e_arq_event_info *e,
955 u16 *pending)
956{
957 i40e_status ret_code = 0;
958 u16 ntc = hw->aq.arq.next_to_clean;
959 struct i40e_aq_desc *desc;
960 struct i40e_dma_mem *bi;
961 u16 desc_idx;
962 u16 datalen;
963 u16 flags;
964 u16 ntu;
965
966 /* pre-clean the event info */
967 memset(&e->desc, 0, sizeof(e->desc));
968
969 /* take the lock before we start messing with the ring */
970 mutex_lock(&hw->aq.arq_mutex);
971
972 if (hw->aq.arq.count == 0) {
973 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
974 "AQRX: Admin queue not initialized.\n");
975 ret_code = I40E_ERR_QUEUE_EMPTY;
976 goto clean_arq_element_err;
977 }
978
979 /* set next_to_use to head */
980 ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
981 if (ntu == ntc) {
982 /* nothing to do - shouldn't need to update ring's values */
983 ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
984 goto clean_arq_element_out;
985 }
986
987 /* now clean the next descriptor */
988 desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
989 desc_idx = ntc;
990
991 hw->aq.arq_last_status =
992 (enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
993 flags = le16_to_cpu(desc->flags);
994 if (flags & I40E_AQ_FLAG_ERR) {
995 ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
996 i40e_debug(hw,
997 I40E_DEBUG_AQ_MESSAGE,
998 "AQRX: Event received with error 0x%X.\n",
999 hw->aq.arq_last_status);
1000 }
1001
1002 e->desc = *desc;
1003 datalen = le16_to_cpu(desc->datalen);
1004 e->msg_len = min(datalen, e->buf_len);
1005 if (e->msg_buf != NULL && (e->msg_len != 0))
1006 memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
1007 e->msg_len);
1008
1009 i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
1010 i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
1011 hw->aq.arq_buf_size);
1012
1013 /* Restore the original datalen and buffer address in the desc,
1014 * FW updates datalen to indicate the event message
1015 * size
1016 */
1017 bi = &hw->aq.arq.r.arq_bi[ntc];
1018 memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
1019
1020 desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
1021 if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
1022 desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
1023 desc->datalen = cpu_to_le16((u16)bi->size);
1024 desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
1025 desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
1026
1027 /* set tail = the last cleaned desc index. */
1028 wr32(hw, hw->aq.arq.tail, ntc);
1029 /* ntc is updated to tail + 1 */
1030 ntc++;
1031 if (ntc == hw->aq.num_arq_entries)
1032 ntc = 0;
1033 hw->aq.arq.next_to_clean = ntc;
1034 hw->aq.arq.next_to_use = ntu;
1035
1036 i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode), &e->desc);
1037clean_arq_element_out:
1038 /* Set pending if needed, unlock and return */
1039 if (pending)
1040 *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
1041clean_arq_element_err:
1042 mutex_unlock(&hw->aq.arq_mutex);
1043
1044 return ret_code;
1045}
1046
1047static void i40e_resume_aq(struct i40e_hw *hw)
1048{
1049 /* Registers are reset after PF reset */
1050 hw->aq.asq.next_to_use = 0;
1051 hw->aq.asq.next_to_clean = 0;
1052
1053 i40e_config_asq_regs(hw);
1054
1055 hw->aq.arq.next_to_use = 0;
1056 hw->aq.arq.next_to_clean = 0;
1057
1058 i40e_config_arq_regs(hw);
1059}