1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2001-2020 Intel Corporation
3 */
4
5 #include "ixgbe_type.h"
6 #include "ixgbe_mbx.h"
7
8 /**
9 * ixgbe_read_mbx - Reads a message from the mailbox
10 * @hw: pointer to the HW structure
11 * @msg: The message buffer
12 * @size: Length of buffer
13 * @mbx_id: id of mailbox to read
14 *
15 * returns SUCCESS if it successfully read message from buffer
16 **/
ixgbe_read_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)17 s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
18 {
19 struct ixgbe_mbx_info *mbx = &hw->mbx;
20 s32 ret_val = IXGBE_ERR_MBX;
21
22 DEBUGFUNC("ixgbe_read_mbx");
23
24 /* limit read to size of mailbox */
25 if (size > mbx->size)
26 size = mbx->size;
27
28 if (mbx->ops.read)
29 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
30
31 return ret_val;
32 }
33
34 /**
35 * ixgbe_write_mbx - Write a message to the mailbox
36 * @hw: pointer to the HW structure
37 * @msg: The message buffer
38 * @size: Length of buffer
39 * @mbx_id: id of mailbox to write
40 *
41 * returns SUCCESS if it successfully copied message into the buffer
42 **/
ixgbe_write_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)43 s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
44 {
45 struct ixgbe_mbx_info *mbx = &hw->mbx;
46 s32 ret_val = IXGBE_SUCCESS;
47
48 DEBUGFUNC("ixgbe_write_mbx");
49
50 if (size > mbx->size) {
51 ret_val = IXGBE_ERR_MBX;
52 ERROR_REPORT2(IXGBE_ERROR_ARGUMENT,
53 "Invalid mailbox message size %d", size);
54 } else if (mbx->ops.write)
55 ret_val = mbx->ops.write(hw, msg, size, mbx_id);
56
57 return ret_val;
58 }
59
60 /**
61 * ixgbe_check_for_msg - checks to see if someone sent us mail
62 * @hw: pointer to the HW structure
63 * @mbx_id: id of mailbox to check
64 *
65 * returns SUCCESS if the Status bit was found or else ERR_MBX
66 **/
ixgbe_check_for_msg(struct ixgbe_hw * hw,u16 mbx_id)67 s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
68 {
69 struct ixgbe_mbx_info *mbx = &hw->mbx;
70 s32 ret_val = IXGBE_ERR_MBX;
71
72 DEBUGFUNC("ixgbe_check_for_msg");
73
74 if (mbx->ops.check_for_msg)
75 ret_val = mbx->ops.check_for_msg(hw, mbx_id);
76
77 return ret_val;
78 }
79
80 /**
81 * ixgbe_check_for_ack - checks to see if someone sent us ACK
82 * @hw: pointer to the HW structure
83 * @mbx_id: id of mailbox to check
84 *
85 * returns SUCCESS if the Status bit was found or else ERR_MBX
86 **/
ixgbe_check_for_ack(struct ixgbe_hw * hw,u16 mbx_id)87 s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
88 {
89 struct ixgbe_mbx_info *mbx = &hw->mbx;
90 s32 ret_val = IXGBE_ERR_MBX;
91
92 DEBUGFUNC("ixgbe_check_for_ack");
93
94 if (mbx->ops.check_for_ack)
95 ret_val = mbx->ops.check_for_ack(hw, mbx_id);
96
97 return ret_val;
98 }
99
100 /**
101 * ixgbe_check_for_rst - checks to see if other side has reset
102 * @hw: pointer to the HW structure
103 * @mbx_id: id of mailbox to check
104 *
105 * returns SUCCESS if the Status bit was found or else ERR_MBX
106 **/
ixgbe_check_for_rst(struct ixgbe_hw * hw,u16 mbx_id)107 s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id)
108 {
109 struct ixgbe_mbx_info *mbx = &hw->mbx;
110 s32 ret_val = IXGBE_ERR_MBX;
111
112 DEBUGFUNC("ixgbe_check_for_rst");
113
114 if (mbx->ops.check_for_rst)
115 ret_val = mbx->ops.check_for_rst(hw, mbx_id);
116
117 return ret_val;
118 }
119
120 /**
121 * ixgbe_poll_for_msg - Wait for message notification
122 * @hw: pointer to the HW structure
123 * @mbx_id: id of mailbox to write
124 *
125 * returns SUCCESS if it successfully received a message notification
126 **/
ixgbe_poll_for_msg(struct ixgbe_hw * hw,u16 mbx_id)127 STATIC s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
128 {
129 struct ixgbe_mbx_info *mbx = &hw->mbx;
130 int countdown = mbx->timeout;
131
132 DEBUGFUNC("ixgbe_poll_for_msg");
133
134 if (!countdown || !mbx->ops.check_for_msg)
135 goto out;
136
137 while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
138 countdown--;
139 if (!countdown)
140 break;
141 usec_delay(mbx->usec_delay);
142 }
143
144 if (countdown == 0)
145 ERROR_REPORT2(IXGBE_ERROR_POLLING,
146 "Polling for VF%d mailbox message timedout", mbx_id);
147
148 out:
149 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
150 }
151
152 /**
153 * ixgbe_poll_for_ack - Wait for message acknowledgment
154 * @hw: pointer to the HW structure
155 * @mbx_id: id of mailbox to write
156 *
157 * returns SUCCESS if it successfully received a message acknowledgment
158 **/
ixgbe_poll_for_ack(struct ixgbe_hw * hw,u16 mbx_id)159 STATIC s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
160 {
161 struct ixgbe_mbx_info *mbx = &hw->mbx;
162 int countdown = mbx->timeout;
163
164 DEBUGFUNC("ixgbe_poll_for_ack");
165
166 if (!countdown || !mbx->ops.check_for_ack)
167 goto out;
168
169 while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
170 countdown--;
171 if (!countdown)
172 break;
173 usec_delay(mbx->usec_delay);
174 }
175
176 if (countdown == 0)
177 ERROR_REPORT2(IXGBE_ERROR_POLLING,
178 "Polling for VF%d mailbox ack timedout", mbx_id);
179
180 out:
181 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
182 }
183
184 /**
185 * ixgbe_read_posted_mbx - Wait for message notification and receive message
186 * @hw: pointer to the HW structure
187 * @msg: The message buffer
188 * @size: Length of buffer
189 * @mbx_id: id of mailbox to write
190 *
191 * returns SUCCESS if it successfully received a message notification and
192 * copied it into the receive buffer.
193 **/
ixgbe_read_posted_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)194 s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
195 {
196 struct ixgbe_mbx_info *mbx = &hw->mbx;
197 s32 ret_val = IXGBE_ERR_MBX;
198
199 DEBUGFUNC("ixgbe_read_posted_mbx");
200
201 if (!mbx->ops.read)
202 goto out;
203
204 ret_val = ixgbe_poll_for_msg(hw, mbx_id);
205
206 /* if ack received read message, otherwise we timed out */
207 if (!ret_val)
208 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
209 out:
210 return ret_val;
211 }
212
213 /**
214 * ixgbe_write_posted_mbx - Write a message to the mailbox, wait for ack
215 * @hw: pointer to the HW structure
216 * @msg: The message buffer
217 * @size: Length of buffer
218 * @mbx_id: id of mailbox to write
219 *
220 * returns SUCCESS if it successfully copied message into the buffer and
221 * received an ack to that message within delay * timeout period
222 **/
ixgbe_write_posted_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)223 s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size,
224 u16 mbx_id)
225 {
226 struct ixgbe_mbx_info *mbx = &hw->mbx;
227 s32 ret_val = IXGBE_ERR_MBX;
228
229 DEBUGFUNC("ixgbe_write_posted_mbx");
230
231 /* exit if either we can't write or there isn't a defined timeout */
232 if (!mbx->ops.write || !mbx->timeout)
233 goto out;
234
235 /* send msg */
236 ret_val = mbx->ops.write(hw, msg, size, mbx_id);
237
238 /* if msg sent wait until we receive an ack */
239 if (!ret_val)
240 ret_val = ixgbe_poll_for_ack(hw, mbx_id);
241 out:
242 return ret_val;
243 }
244
245 /**
246 * ixgbe_init_mbx_ops_generic - Initialize MB function pointers
247 * @hw: pointer to the HW structure
248 *
249 * Setups up the mailbox read and write message function pointers
250 **/
ixgbe_init_mbx_ops_generic(struct ixgbe_hw * hw)251 void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw)
252 {
253 struct ixgbe_mbx_info *mbx = &hw->mbx;
254
255 mbx->ops.read_posted = ixgbe_read_posted_mbx;
256 mbx->ops.write_posted = ixgbe_write_posted_mbx;
257 }
258
259 /**
260 * ixgbe_read_v2p_mailbox - read v2p mailbox
261 * @hw: pointer to the HW structure
262 *
263 * This function is used to read the v2p mailbox without losing the read to
264 * clear status bits.
265 **/
ixgbe_read_v2p_mailbox(struct ixgbe_hw * hw)266 STATIC u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw)
267 {
268 u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX);
269
270 v2p_mailbox |= hw->mbx.v2p_mailbox;
271 hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS;
272
273 return v2p_mailbox;
274 }
275
276 /**
277 * ixgbe_check_for_bit_vf - Determine if a status bit was set
278 * @hw: pointer to the HW structure
279 * @mask: bitmask for bits to be tested and cleared
280 *
281 * This function is used to check for the read to clear bits within
282 * the V2P mailbox.
283 **/
ixgbe_check_for_bit_vf(struct ixgbe_hw * hw,u32 mask)284 STATIC s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask)
285 {
286 u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw);
287 s32 ret_val = IXGBE_ERR_MBX;
288
289 if (v2p_mailbox & mask)
290 ret_val = IXGBE_SUCCESS;
291
292 hw->mbx.v2p_mailbox &= ~mask;
293
294 return ret_val;
295 }
296
297 /**
298 * ixgbe_check_for_msg_vf - checks to see if the PF has sent mail
299 * @hw: pointer to the HW structure
300 * @mbx_id: id of mailbox to check
301 *
302 * returns SUCCESS if the PF has set the Status bit or else ERR_MBX
303 **/
ixgbe_check_for_msg_vf(struct ixgbe_hw * hw,u16 mbx_id)304 STATIC s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id)
305 {
306 s32 ret_val = IXGBE_ERR_MBX;
307
308 UNREFERENCED_1PARAMETER(mbx_id);
309 DEBUGFUNC("ixgbe_check_for_msg_vf");
310
311 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) {
312 ret_val = IXGBE_SUCCESS;
313 hw->mbx.stats.reqs++;
314 }
315
316 return ret_val;
317 }
318
319 /**
320 * ixgbe_check_for_ack_vf - checks to see if the PF has ACK'd
321 * @hw: pointer to the HW structure
322 * @mbx_id: id of mailbox to check
323 *
324 * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX
325 **/
ixgbe_check_for_ack_vf(struct ixgbe_hw * hw,u16 mbx_id)326 STATIC s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id)
327 {
328 s32 ret_val = IXGBE_ERR_MBX;
329
330 UNREFERENCED_1PARAMETER(mbx_id);
331 DEBUGFUNC("ixgbe_check_for_ack_vf");
332
333 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) {
334 ret_val = IXGBE_SUCCESS;
335 hw->mbx.stats.acks++;
336 }
337
338 return ret_val;
339 }
340
341 /**
342 * ixgbe_check_for_rst_vf - checks to see if the PF has reset
343 * @hw: pointer to the HW structure
344 * @mbx_id: id of mailbox to check
345 *
346 * returns true if the PF has set the reset done bit or else false
347 **/
ixgbe_check_for_rst_vf(struct ixgbe_hw * hw,u16 mbx_id)348 STATIC s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id)
349 {
350 s32 ret_val = IXGBE_ERR_MBX;
351
352 UNREFERENCED_1PARAMETER(mbx_id);
353 DEBUGFUNC("ixgbe_check_for_rst_vf");
354
355 if (!ixgbe_check_for_bit_vf(hw, (IXGBE_VFMAILBOX_RSTD |
356 IXGBE_VFMAILBOX_RSTI))) {
357 ret_val = IXGBE_SUCCESS;
358 hw->mbx.stats.rsts++;
359 }
360
361 return ret_val;
362 }
363
364 /**
365 * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock
366 * @hw: pointer to the HW structure
367 *
368 * return SUCCESS if we obtained the mailbox lock
369 **/
ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw * hw)370 STATIC s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw)
371 {
372 s32 ret_val = IXGBE_ERR_MBX;
373
374 DEBUGFUNC("ixgbe_obtain_mbx_lock_vf");
375
376 /* Take ownership of the buffer */
377 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU);
378
379 /* reserve mailbox for vf use */
380 if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU)
381 ret_val = IXGBE_SUCCESS;
382
383 return ret_val;
384 }
385
386 /**
387 * ixgbe_write_mbx_vf - Write a message to the mailbox
388 * @hw: pointer to the HW structure
389 * @msg: The message buffer
390 * @size: Length of buffer
391 * @mbx_id: id of mailbox to write
392 *
393 * returns SUCCESS if it successfully copied message into the buffer
394 **/
ixgbe_write_mbx_vf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)395 STATIC s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
396 u16 mbx_id)
397 {
398 s32 ret_val;
399 u16 i;
400
401 UNREFERENCED_1PARAMETER(mbx_id);
402
403 DEBUGFUNC("ixgbe_write_mbx_vf");
404
405 /* lock the mailbox to prevent pf/vf race condition */
406 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
407 if (ret_val)
408 goto out_no_write;
409
410 /* flush msg and acks as we are overwriting the message buffer */
411 ixgbe_check_for_msg_vf(hw, 0);
412 ixgbe_check_for_ack_vf(hw, 0);
413
414 /* copy the caller specified message to the mailbox memory buffer */
415 for (i = 0; i < size; i++)
416 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, msg[i]);
417
418 /* update stats */
419 hw->mbx.stats.msgs_tx++;
420
421 /* Drop VFU and interrupt the PF to tell it a message has been sent */
422 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ);
423
424 out_no_write:
425 return ret_val;
426 }
427
428 /**
429 * ixgbe_read_mbx_vf - Reads a message from the inbox intended for vf
430 * @hw: pointer to the HW structure
431 * @msg: The message buffer
432 * @size: Length of buffer
433 * @mbx_id: id of mailbox to read
434 *
435 * returns SUCCESS if it successfully read message from buffer
436 **/
ixgbe_read_mbx_vf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)437 STATIC s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
438 u16 mbx_id)
439 {
440 s32 ret_val = IXGBE_SUCCESS;
441 u16 i;
442
443 DEBUGFUNC("ixgbe_read_mbx_vf");
444 UNREFERENCED_1PARAMETER(mbx_id);
445
446 /* lock the mailbox to prevent pf/vf race condition */
447 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
448 if (ret_val)
449 goto out_no_read;
450
451 /* copy the message from the mailbox memory buffer */
452 for (i = 0; i < size; i++)
453 msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_VFMBMEM, i);
454
455 /* Acknowledge receipt and release mailbox, then we're done */
456 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK);
457
458 /* update stats */
459 hw->mbx.stats.msgs_rx++;
460
461 out_no_read:
462 return ret_val;
463 }
464
465 /**
466 * ixgbe_init_mbx_params_vf - set initial values for vf mailbox
467 * @hw: pointer to the HW structure
468 *
469 * Initializes the hw->mbx struct to correct values for vf mailbox
470 */
ixgbe_init_mbx_params_vf(struct ixgbe_hw * hw)471 void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw)
472 {
473 struct ixgbe_mbx_info *mbx = &hw->mbx;
474
475 /* start mailbox as timed out and let the reset_hw call set the timeout
476 * value to begin communications */
477 mbx->timeout = 0;
478 mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
479
480 mbx->size = IXGBE_VFMAILBOX_SIZE;
481
482 mbx->ops.read = ixgbe_read_mbx_vf;
483 mbx->ops.write = ixgbe_write_mbx_vf;
484 mbx->ops.read_posted = ixgbe_read_posted_mbx;
485 mbx->ops.write_posted = ixgbe_write_posted_mbx;
486 mbx->ops.check_for_msg = ixgbe_check_for_msg_vf;
487 mbx->ops.check_for_ack = ixgbe_check_for_ack_vf;
488 mbx->ops.check_for_rst = ixgbe_check_for_rst_vf;
489
490 mbx->stats.msgs_tx = 0;
491 mbx->stats.msgs_rx = 0;
492 mbx->stats.reqs = 0;
493 mbx->stats.acks = 0;
494 mbx->stats.rsts = 0;
495 }
496
ixgbe_check_for_bit_pf(struct ixgbe_hw * hw,u32 mask,s32 index)497 STATIC s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index)
498 {
499 u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index));
500 s32 ret_val = IXGBE_ERR_MBX;
501
502 if (mbvficr & mask) {
503 ret_val = IXGBE_SUCCESS;
504 IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask);
505 }
506
507 return ret_val;
508 }
509
510 /**
511 * ixgbe_check_for_msg_pf - checks to see if the VF has sent mail
512 * @hw: pointer to the HW structure
513 * @vf_number: the VF index
514 *
515 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
516 **/
ixgbe_check_for_msg_pf(struct ixgbe_hw * hw,u16 vf_number)517 STATIC s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number)
518 {
519 s32 ret_val = IXGBE_ERR_MBX;
520 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
521 u32 vf_bit = vf_number % 16;
522
523 DEBUGFUNC("ixgbe_check_for_msg_pf");
524
525 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit,
526 index)) {
527 ret_val = IXGBE_SUCCESS;
528 hw->mbx.stats.reqs++;
529 }
530
531 return ret_val;
532 }
533
534 /**
535 * ixgbe_check_for_ack_pf - checks to see if the VF has ACKed
536 * @hw: pointer to the HW structure
537 * @vf_number: the VF index
538 *
539 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
540 **/
ixgbe_check_for_ack_pf(struct ixgbe_hw * hw,u16 vf_number)541 STATIC s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number)
542 {
543 s32 ret_val = IXGBE_ERR_MBX;
544 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
545 u32 vf_bit = vf_number % 16;
546
547 DEBUGFUNC("ixgbe_check_for_ack_pf");
548
549 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit,
550 index)) {
551 ret_val = IXGBE_SUCCESS;
552 hw->mbx.stats.acks++;
553 }
554
555 return ret_val;
556 }
557
558 /**
559 * ixgbe_check_for_rst_pf - checks to see if the VF has reset
560 * @hw: pointer to the HW structure
561 * @vf_number: the VF index
562 *
563 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
564 **/
ixgbe_check_for_rst_pf(struct ixgbe_hw * hw,u16 vf_number)565 STATIC s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number)
566 {
567 u32 reg_offset = (vf_number < 32) ? 0 : 1;
568 u32 vf_shift = vf_number % 32;
569 u32 vflre = 0;
570 s32 ret_val = IXGBE_ERR_MBX;
571
572 DEBUGFUNC("ixgbe_check_for_rst_pf");
573
574 switch (hw->mac.type) {
575 case ixgbe_mac_82599EB:
576 vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset));
577 break;
578 case ixgbe_mac_X550:
579 case ixgbe_mac_X550EM_x:
580 case ixgbe_mac_X550EM_a:
581 case ixgbe_mac_X540:
582 vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset));
583 break;
584 default:
585 break;
586 }
587
588 if (vflre & (1 << vf_shift)) {
589 ret_val = IXGBE_SUCCESS;
590 IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift));
591 hw->mbx.stats.rsts++;
592 }
593
594 return ret_val;
595 }
596
597 /**
598 * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock
599 * @hw: pointer to the HW structure
600 * @vf_number: the VF index
601 *
602 * return SUCCESS if we obtained the mailbox lock
603 **/
ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw * hw,u16 vf_number)604 STATIC s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number)
605 {
606 s32 ret_val = IXGBE_ERR_MBX;
607 u32 p2v_mailbox;
608
609 DEBUGFUNC("ixgbe_obtain_mbx_lock_pf");
610
611 /* Take ownership of the buffer */
612 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU);
613
614 /* reserve mailbox for vf use */
615 p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number));
616 if (p2v_mailbox & IXGBE_PFMAILBOX_PFU)
617 ret_val = IXGBE_SUCCESS;
618 else
619 ERROR_REPORT2(IXGBE_ERROR_POLLING,
620 "Failed to obtain mailbox lock for VF%d", vf_number);
621
622
623 return ret_val;
624 }
625
626 /**
627 * ixgbe_write_mbx_pf - Places a message in the mailbox
628 * @hw: pointer to the HW structure
629 * @msg: The message buffer
630 * @size: Length of buffer
631 * @vf_number: the VF index
632 *
633 * returns SUCCESS if it successfully copied message into the buffer
634 **/
ixgbe_write_mbx_pf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 vf_number)635 STATIC s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
636 u16 vf_number)
637 {
638 s32 ret_val;
639 u16 i;
640
641 DEBUGFUNC("ixgbe_write_mbx_pf");
642
643 /* lock the mailbox to prevent pf/vf race condition */
644 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
645 if (ret_val)
646 goto out_no_write;
647
648 /* flush msg and acks as we are overwriting the message buffer */
649 ixgbe_check_for_msg_pf(hw, vf_number);
650 ixgbe_check_for_ack_pf(hw, vf_number);
651
652 /* copy the caller specified message to the mailbox memory buffer */
653 for (i = 0; i < size; i++)
654 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]);
655
656 /* Interrupt VF to tell it a message has been sent and release buffer*/
657 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS);
658
659 /* update stats */
660 hw->mbx.stats.msgs_tx++;
661
662 out_no_write:
663 return ret_val;
664
665 }
666
667 /**
668 * ixgbe_read_mbx_pf - Read a message from the mailbox
669 * @hw: pointer to the HW structure
670 * @msg: The message buffer
671 * @size: Length of buffer
672 * @vf_number: the VF index
673 *
674 * This function copies a message from the mailbox buffer to the caller's
675 * memory buffer. The presumption is that the caller knows that there was
676 * a message due to a VF request so no polling for message is needed.
677 **/
ixgbe_read_mbx_pf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 vf_number)678 STATIC s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
679 u16 vf_number)
680 {
681 s32 ret_val;
682 u16 i;
683
684 DEBUGFUNC("ixgbe_read_mbx_pf");
685
686 /* lock the mailbox to prevent pf/vf race condition */
687 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
688 if (ret_val)
689 goto out_no_read;
690
691 /* copy the message to the mailbox memory buffer */
692 for (i = 0; i < size; i++)
693 msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i);
694
695 /* Acknowledge the message and release buffer */
696 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK);
697
698 /* update stats */
699 hw->mbx.stats.msgs_rx++;
700
701 out_no_read:
702 return ret_val;
703 }
704
705 /**
706 * ixgbe_init_mbx_params_pf - set initial values for pf mailbox
707 * @hw: pointer to the HW structure
708 *
709 * Initializes the hw->mbx struct to correct values for pf mailbox
710 */
ixgbe_init_mbx_params_pf(struct ixgbe_hw * hw)711 void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw)
712 {
713 struct ixgbe_mbx_info *mbx = &hw->mbx;
714
715 if (hw->mac.type != ixgbe_mac_82599EB &&
716 hw->mac.type != ixgbe_mac_X550 &&
717 hw->mac.type != ixgbe_mac_X550EM_x &&
718 hw->mac.type != ixgbe_mac_X550EM_a &&
719 hw->mac.type != ixgbe_mac_X540)
720 return;
721
722 mbx->timeout = 0;
723 mbx->usec_delay = 0;
724
725 mbx->size = IXGBE_VFMAILBOX_SIZE;
726
727 mbx->ops.read = ixgbe_read_mbx_pf;
728 mbx->ops.write = ixgbe_write_mbx_pf;
729 mbx->ops.read_posted = ixgbe_read_posted_mbx;
730 mbx->ops.write_posted = ixgbe_write_posted_mbx;
731 mbx->ops.check_for_msg = ixgbe_check_for_msg_pf;
732 mbx->ops.check_for_ack = ixgbe_check_for_ack_pf;
733 mbx->ops.check_for_rst = ixgbe_check_for_rst_pf;
734
735 mbx->stats.msgs_tx = 0;
736 mbx->stats.msgs_rx = 0;
737 mbx->stats.reqs = 0;
738 mbx->stats.acks = 0;
739 mbx->stats.rsts = 0;
740 }
741