1 /******************************************************************************
2
3 Copyright (c) 2001-2015, Intel Corporation
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions are met:
8
9 1. Redistributions of source code must retain the above copyright notice,
10 this list of conditions and the following disclaimer.
11
12 2. Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in the
14 documentation and/or other materials provided with the distribution.
15
16 3. Neither the name of the Intel Corporation nor the names of its
17 contributors may be used to endorse or promote products derived from
18 this software without specific prior written permission.
19
20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 POSSIBILITY OF SUCH DAMAGE.
31
32 ******************************************************************************/
33 /*$FreeBSD$*/
34
35 #include "ixgbe_type.h"
36 #include "ixgbe_mbx.h"
37
38 /**
39 * ixgbe_read_mbx - Reads a message from the mailbox
40 * @hw: pointer to the HW structure
41 * @msg: The message buffer
42 * @size: Length of buffer
43 * @mbx_id: id of mailbox to read
44 *
45 * returns SUCCESS if it successfully read message from buffer
46 **/
ixgbe_read_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)47 s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
48 {
49 struct ixgbe_mbx_info *mbx = &hw->mbx;
50 s32 ret_val = IXGBE_ERR_MBX;
51
52 DEBUGFUNC("ixgbe_read_mbx");
53
54 /* limit read to size of mailbox */
55 if (size > mbx->size)
56 size = mbx->size;
57
58 if (mbx->ops.read)
59 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
60
61 return ret_val;
62 }
63
64 /**
65 * ixgbe_write_mbx - Write a message to the mailbox
66 * @hw: pointer to the HW structure
67 * @msg: The message buffer
68 * @size: Length of buffer
69 * @mbx_id: id of mailbox to write
70 *
71 * returns SUCCESS if it successfully copied message into the buffer
72 **/
ixgbe_write_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)73 s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
74 {
75 struct ixgbe_mbx_info *mbx = &hw->mbx;
76 s32 ret_val = IXGBE_SUCCESS;
77
78 DEBUGFUNC("ixgbe_write_mbx");
79
80 if (size > mbx->size) {
81 ret_val = IXGBE_ERR_MBX;
82 ERROR_REPORT2(IXGBE_ERROR_ARGUMENT,
83 "Invalid mailbox message size %d", size);
84 } else if (mbx->ops.write)
85 ret_val = mbx->ops.write(hw, msg, size, mbx_id);
86
87 return ret_val;
88 }
89
90 /**
91 * ixgbe_check_for_msg - checks to see if someone sent us mail
92 * @hw: pointer to the HW structure
93 * @mbx_id: id of mailbox to check
94 *
95 * returns SUCCESS if the Status bit was found or else ERR_MBX
96 **/
ixgbe_check_for_msg(struct ixgbe_hw * hw,u16 mbx_id)97 s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
98 {
99 struct ixgbe_mbx_info *mbx = &hw->mbx;
100 s32 ret_val = IXGBE_ERR_MBX;
101
102 DEBUGFUNC("ixgbe_check_for_msg");
103
104 if (mbx->ops.check_for_msg)
105 ret_val = mbx->ops.check_for_msg(hw, mbx_id);
106
107 return ret_val;
108 }
109
110 /**
111 * ixgbe_check_for_ack - checks to see if someone sent us ACK
112 * @hw: pointer to the HW structure
113 * @mbx_id: id of mailbox to check
114 *
115 * returns SUCCESS if the Status bit was found or else ERR_MBX
116 **/
ixgbe_check_for_ack(struct ixgbe_hw * hw,u16 mbx_id)117 s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
118 {
119 struct ixgbe_mbx_info *mbx = &hw->mbx;
120 s32 ret_val = IXGBE_ERR_MBX;
121
122 DEBUGFUNC("ixgbe_check_for_ack");
123
124 if (mbx->ops.check_for_ack)
125 ret_val = mbx->ops.check_for_ack(hw, mbx_id);
126
127 return ret_val;
128 }
129
130 /**
131 * ixgbe_check_for_rst - checks to see if other side has reset
132 * @hw: pointer to the HW structure
133 * @mbx_id: id of mailbox to check
134 *
135 * returns SUCCESS if the Status bit was found or else ERR_MBX
136 **/
ixgbe_check_for_rst(struct ixgbe_hw * hw,u16 mbx_id)137 s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id)
138 {
139 struct ixgbe_mbx_info *mbx = &hw->mbx;
140 s32 ret_val = IXGBE_ERR_MBX;
141
142 DEBUGFUNC("ixgbe_check_for_rst");
143
144 if (mbx->ops.check_for_rst)
145 ret_val = mbx->ops.check_for_rst(hw, mbx_id);
146
147 return ret_val;
148 }
149
150 /**
151 * ixgbe_poll_for_msg - Wait for message notification
152 * @hw: pointer to the HW structure
153 * @mbx_id: id of mailbox to write
154 *
155 * returns SUCCESS if it successfully received a message notification
156 **/
ixgbe_poll_for_msg(struct ixgbe_hw * hw,u16 mbx_id)157 static s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
158 {
159 struct ixgbe_mbx_info *mbx = &hw->mbx;
160 int countdown = mbx->timeout;
161
162 DEBUGFUNC("ixgbe_poll_for_msg");
163
164 if (!countdown || !mbx->ops.check_for_msg)
165 goto out;
166
167 while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
168 countdown--;
169 if (!countdown)
170 break;
171 usec_delay(mbx->usec_delay);
172 }
173
174 if (countdown == 0)
175 ERROR_REPORT2(IXGBE_ERROR_POLLING,
176 "Polling for VF%d mailbox message timedout", mbx_id);
177
178 out:
179 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
180 }
181
182 /**
183 * ixgbe_poll_for_ack - Wait for message acknowledgement
184 * @hw: pointer to the HW structure
185 * @mbx_id: id of mailbox to write
186 *
187 * returns SUCCESS if it successfully received a message acknowledgement
188 **/
ixgbe_poll_for_ack(struct ixgbe_hw * hw,u16 mbx_id)189 static s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
190 {
191 struct ixgbe_mbx_info *mbx = &hw->mbx;
192 int countdown = mbx->timeout;
193
194 DEBUGFUNC("ixgbe_poll_for_ack");
195
196 if (!countdown || !mbx->ops.check_for_ack)
197 goto out;
198
199 while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
200 countdown--;
201 if (!countdown)
202 break;
203 usec_delay(mbx->usec_delay);
204 }
205
206 if (countdown == 0)
207 ERROR_REPORT2(IXGBE_ERROR_POLLING,
208 "Polling for VF%d mailbox ack timedout", mbx_id);
209
210 out:
211 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
212 }
213
214 /**
215 * ixgbe_read_posted_mbx - Wait for message notification and receive message
216 * @hw: pointer to the HW structure
217 * @msg: The message buffer
218 * @size: Length of buffer
219 * @mbx_id: id of mailbox to write
220 *
221 * returns SUCCESS if it successfully received a message notification and
222 * copied it into the receive buffer.
223 **/
ixgbe_read_posted_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)224 s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
225 {
226 struct ixgbe_mbx_info *mbx = &hw->mbx;
227 s32 ret_val = IXGBE_ERR_MBX;
228
229 DEBUGFUNC("ixgbe_read_posted_mbx");
230
231 if (!mbx->ops.read)
232 goto out;
233
234 ret_val = ixgbe_poll_for_msg(hw, mbx_id);
235
236 /* if ack received read message, otherwise we timed out */
237 if (!ret_val)
238 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
239 out:
240 return ret_val;
241 }
242
243 /**
244 * ixgbe_write_posted_mbx - Write a message to the mailbox, wait for ack
245 * @hw: pointer to the HW structure
246 * @msg: The message buffer
247 * @size: Length of buffer
248 * @mbx_id: id of mailbox to write
249 *
250 * returns SUCCESS if it successfully copied message into the buffer and
251 * received an ack to that message within delay * timeout period
252 **/
ixgbe_write_posted_mbx(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)253 s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size,
254 u16 mbx_id)
255 {
256 struct ixgbe_mbx_info *mbx = &hw->mbx;
257 s32 ret_val = IXGBE_ERR_MBX;
258
259 DEBUGFUNC("ixgbe_write_posted_mbx");
260
261 /* exit if either we can't write or there isn't a defined timeout */
262 if (!mbx->ops.write || !mbx->timeout)
263 goto out;
264
265 /* send msg */
266 ret_val = mbx->ops.write(hw, msg, size, mbx_id);
267
268 /* if msg sent wait until we receive an ack */
269 if (!ret_val)
270 ret_val = ixgbe_poll_for_ack(hw, mbx_id);
271 out:
272 return ret_val;
273 }
274
275 /**
276 * ixgbe_init_mbx_ops_generic - Initialize MB function pointers
277 * @hw: pointer to the HW structure
278 *
279 * Setups up the mailbox read and write message function pointers
280 **/
ixgbe_init_mbx_ops_generic(struct ixgbe_hw * hw)281 void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw)
282 {
283 struct ixgbe_mbx_info *mbx = &hw->mbx;
284
285 mbx->ops.read_posted = ixgbe_read_posted_mbx;
286 mbx->ops.write_posted = ixgbe_write_posted_mbx;
287 }
288
289 /**
290 * ixgbe_read_v2p_mailbox - read v2p mailbox
291 * @hw: pointer to the HW structure
292 *
293 * This function is used to read the v2p mailbox without losing the read to
294 * clear status bits.
295 **/
ixgbe_read_v2p_mailbox(struct ixgbe_hw * hw)296 static u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw)
297 {
298 u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX);
299
300 v2p_mailbox |= hw->mbx.v2p_mailbox;
301 hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS;
302
303 return v2p_mailbox;
304 }
305
306 /**
307 * ixgbe_check_for_bit_vf - Determine if a status bit was set
308 * @hw: pointer to the HW structure
309 * @mask: bitmask for bits to be tested and cleared
310 *
311 * This function is used to check for the read to clear bits within
312 * the V2P mailbox.
313 **/
ixgbe_check_for_bit_vf(struct ixgbe_hw * hw,u32 mask)314 static s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask)
315 {
316 u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw);
317 s32 ret_val = IXGBE_ERR_MBX;
318
319 if (v2p_mailbox & mask)
320 ret_val = IXGBE_SUCCESS;
321
322 hw->mbx.v2p_mailbox &= ~mask;
323
324 return ret_val;
325 }
326
327 /**
328 * ixgbe_check_for_msg_vf - checks to see if the PF has sent mail
329 * @hw: pointer to the HW structure
330 * @mbx_id: id of mailbox to check
331 *
332 * returns SUCCESS if the PF has set the Status bit or else ERR_MBX
333 **/
ixgbe_check_for_msg_vf(struct ixgbe_hw * hw,u16 mbx_id)334 static s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id)
335 {
336 s32 ret_val = IXGBE_ERR_MBX;
337
338 UNREFERENCED_1PARAMETER(mbx_id);
339 DEBUGFUNC("ixgbe_check_for_msg_vf");
340
341 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) {
342 ret_val = IXGBE_SUCCESS;
343 hw->mbx.stats.reqs++;
344 }
345
346 return ret_val;
347 }
348
349 /**
350 * ixgbe_check_for_ack_vf - checks to see if the PF has ACK'd
351 * @hw: pointer to the HW structure
352 * @mbx_id: id of mailbox to check
353 *
354 * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX
355 **/
ixgbe_check_for_ack_vf(struct ixgbe_hw * hw,u16 mbx_id)356 static s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id)
357 {
358 s32 ret_val = IXGBE_ERR_MBX;
359
360 UNREFERENCED_1PARAMETER(mbx_id);
361 DEBUGFUNC("ixgbe_check_for_ack_vf");
362
363 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) {
364 ret_val = IXGBE_SUCCESS;
365 hw->mbx.stats.acks++;
366 }
367
368 return ret_val;
369 }
370
371 /**
372 * ixgbe_check_for_rst_vf - checks to see if the PF has reset
373 * @hw: pointer to the HW structure
374 * @mbx_id: id of mailbox to check
375 *
376 * returns TRUE if the PF has set the reset done bit or else FALSE
377 **/
ixgbe_check_for_rst_vf(struct ixgbe_hw * hw,u16 mbx_id)378 static s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id)
379 {
380 s32 ret_val = IXGBE_ERR_MBX;
381
382 UNREFERENCED_1PARAMETER(mbx_id);
383 DEBUGFUNC("ixgbe_check_for_rst_vf");
384
385 if (!ixgbe_check_for_bit_vf(hw, (IXGBE_VFMAILBOX_RSTD |
386 IXGBE_VFMAILBOX_RSTI))) {
387 ret_val = IXGBE_SUCCESS;
388 hw->mbx.stats.rsts++;
389 }
390
391 return ret_val;
392 }
393
394 /**
395 * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock
396 * @hw: pointer to the HW structure
397 *
398 * return SUCCESS if we obtained the mailbox lock
399 **/
ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw * hw)400 static s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw)
401 {
402 s32 ret_val = IXGBE_ERR_MBX;
403
404 DEBUGFUNC("ixgbe_obtain_mbx_lock_vf");
405
406 /* Take ownership of the buffer */
407 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU);
408
409 /* reserve mailbox for vf use */
410 if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU)
411 ret_val = IXGBE_SUCCESS;
412
413 return ret_val;
414 }
415
416 /**
417 * ixgbe_write_mbx_vf - Write a message to the mailbox
418 * @hw: pointer to the HW structure
419 * @msg: The message buffer
420 * @size: Length of buffer
421 * @mbx_id: id of mailbox to write
422 *
423 * returns SUCCESS if it successfully copied message into the buffer
424 **/
ixgbe_write_mbx_vf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)425 static s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
426 u16 mbx_id)
427 {
428 s32 ret_val;
429 u16 i;
430
431 UNREFERENCED_1PARAMETER(mbx_id);
432
433 DEBUGFUNC("ixgbe_write_mbx_vf");
434
435 /* lock the mailbox to prevent pf/vf race condition */
436 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
437 if (ret_val)
438 goto out_no_write;
439
440 /* flush msg and acks as we are overwriting the message buffer */
441 ixgbe_check_for_msg_vf(hw, 0);
442 ixgbe_check_for_ack_vf(hw, 0);
443
444 /* copy the caller specified message to the mailbox memory buffer */
445 for (i = 0; i < size; i++)
446 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, msg[i]);
447
448 /* update stats */
449 hw->mbx.stats.msgs_tx++;
450
451 /* Drop VFU and interrupt the PF to tell it a message has been sent */
452 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ);
453
454 out_no_write:
455 return ret_val;
456 }
457
458 /**
459 * ixgbe_read_mbx_vf - Reads a message from the inbox intended for vf
460 * @hw: pointer to the HW structure
461 * @msg: The message buffer
462 * @size: Length of buffer
463 * @mbx_id: id of mailbox to read
464 *
465 * returns SUCCESS if it successfully read message from buffer
466 **/
ixgbe_read_mbx_vf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 mbx_id)467 static s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
468 u16 mbx_id)
469 {
470 s32 ret_val = IXGBE_SUCCESS;
471 u16 i;
472
473 DEBUGFUNC("ixgbe_read_mbx_vf");
474 UNREFERENCED_1PARAMETER(mbx_id);
475
476 /* lock the mailbox to prevent pf/vf race condition */
477 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
478 if (ret_val)
479 goto out_no_read;
480
481 /* copy the message from the mailbox memory buffer */
482 for (i = 0; i < size; i++)
483 msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_VFMBMEM, i);
484
485 /* Acknowledge receipt and release mailbox, then we're done */
486 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK);
487
488 /* update stats */
489 hw->mbx.stats.msgs_rx++;
490
491 out_no_read:
492 return ret_val;
493 }
494
495 /**
496 * ixgbe_init_mbx_params_vf - set initial values for vf mailbox
497 * @hw: pointer to the HW structure
498 *
499 * Initializes the hw->mbx struct to correct values for vf mailbox
500 */
ixgbe_init_mbx_params_vf(struct ixgbe_hw * hw)501 void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw)
502 {
503 struct ixgbe_mbx_info *mbx = &hw->mbx;
504
505 /* start mailbox as timed out and let the reset_hw call set the timeout
506 * value to begin communications */
507 mbx->timeout = 0;
508 mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
509
510 mbx->size = IXGBE_VFMAILBOX_SIZE;
511
512 mbx->ops.read = ixgbe_read_mbx_vf;
513 mbx->ops.write = ixgbe_write_mbx_vf;
514 mbx->ops.read_posted = ixgbe_read_posted_mbx;
515 mbx->ops.write_posted = ixgbe_write_posted_mbx;
516 mbx->ops.check_for_msg = ixgbe_check_for_msg_vf;
517 mbx->ops.check_for_ack = ixgbe_check_for_ack_vf;
518 mbx->ops.check_for_rst = ixgbe_check_for_rst_vf;
519
520 mbx->stats.msgs_tx = 0;
521 mbx->stats.msgs_rx = 0;
522 mbx->stats.reqs = 0;
523 mbx->stats.acks = 0;
524 mbx->stats.rsts = 0;
525 }
526
ixgbe_check_for_bit_pf(struct ixgbe_hw * hw,u32 mask,s32 index)527 static s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index)
528 {
529 u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index));
530 s32 ret_val = IXGBE_ERR_MBX;
531
532 if (mbvficr & mask) {
533 ret_val = IXGBE_SUCCESS;
534 IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask);
535 }
536
537 return ret_val;
538 }
539
540 /**
541 * ixgbe_check_for_msg_pf - checks to see if the VF has sent mail
542 * @hw: pointer to the HW structure
543 * @vf_number: the VF index
544 *
545 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
546 **/
ixgbe_check_for_msg_pf(struct ixgbe_hw * hw,u16 vf_number)547 static s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number)
548 {
549 s32 ret_val = IXGBE_ERR_MBX;
550 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
551 u32 vf_bit = vf_number % 16;
552
553 DEBUGFUNC("ixgbe_check_for_msg_pf");
554
555 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit,
556 index)) {
557 ret_val = IXGBE_SUCCESS;
558 hw->mbx.stats.reqs++;
559 }
560
561 return ret_val;
562 }
563
564 /**
565 * ixgbe_check_for_ack_pf - checks to see if the VF has ACKed
566 * @hw: pointer to the HW structure
567 * @vf_number: the VF index
568 *
569 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
570 **/
ixgbe_check_for_ack_pf(struct ixgbe_hw * hw,u16 vf_number)571 static s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number)
572 {
573 s32 ret_val = IXGBE_ERR_MBX;
574 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
575 u32 vf_bit = vf_number % 16;
576
577 DEBUGFUNC("ixgbe_check_for_ack_pf");
578
579 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit,
580 index)) {
581 ret_val = IXGBE_SUCCESS;
582 hw->mbx.stats.acks++;
583 }
584
585 return ret_val;
586 }
587
588 /**
589 * ixgbe_check_for_rst_pf - checks to see if the VF has reset
590 * @hw: pointer to the HW structure
591 * @vf_number: the VF index
592 *
593 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
594 **/
ixgbe_check_for_rst_pf(struct ixgbe_hw * hw,u16 vf_number)595 static s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number)
596 {
597 u32 reg_offset = (vf_number < 32) ? 0 : 1;
598 u32 vf_shift = vf_number % 32;
599 u32 vflre = 0;
600 s32 ret_val = IXGBE_ERR_MBX;
601
602 DEBUGFUNC("ixgbe_check_for_rst_pf");
603
604 switch (hw->mac.type) {
605 case ixgbe_mac_82599EB:
606 vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset));
607 break;
608 case ixgbe_mac_X550:
609 case ixgbe_mac_X550EM_x:
610 case ixgbe_mac_X540:
611 vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset));
612 break;
613 default:
614 break;
615 }
616
617 if (vflre & (1 << vf_shift)) {
618 ret_val = IXGBE_SUCCESS;
619 IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift));
620 hw->mbx.stats.rsts++;
621 }
622
623 return ret_val;
624 }
625
626 /**
627 * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock
628 * @hw: pointer to the HW structure
629 * @vf_number: the VF index
630 *
631 * return SUCCESS if we obtained the mailbox lock
632 **/
ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw * hw,u16 vf_number)633 static s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number)
634 {
635 s32 ret_val = IXGBE_ERR_MBX;
636 u32 p2v_mailbox;
637
638 DEBUGFUNC("ixgbe_obtain_mbx_lock_pf");
639
640 /* Take ownership of the buffer */
641 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU);
642
643 /* reserve mailbox for vf use */
644 p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number));
645 if (p2v_mailbox & IXGBE_PFMAILBOX_PFU)
646 ret_val = IXGBE_SUCCESS;
647 else
648 ERROR_REPORT2(IXGBE_ERROR_POLLING,
649 "Failed to obtain mailbox lock for VF%d", vf_number);
650
651
652 return ret_val;
653 }
654
655 /**
656 * ixgbe_write_mbx_pf - Places a message in the mailbox
657 * @hw: pointer to the HW structure
658 * @msg: The message buffer
659 * @size: Length of buffer
660 * @vf_number: the VF index
661 *
662 * returns SUCCESS if it successfully copied message into the buffer
663 **/
ixgbe_write_mbx_pf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 vf_number)664 static s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
665 u16 vf_number)
666 {
667 s32 ret_val;
668 u16 i;
669
670 DEBUGFUNC("ixgbe_write_mbx_pf");
671
672 /* lock the mailbox to prevent pf/vf race condition */
673 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
674 if (ret_val)
675 goto out_no_write;
676
677 /* flush msg and acks as we are overwriting the message buffer */
678 ixgbe_check_for_msg_pf(hw, vf_number);
679 ixgbe_check_for_ack_pf(hw, vf_number);
680
681 /* copy the caller specified message to the mailbox memory buffer */
682 for (i = 0; i < size; i++)
683 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]);
684
685 /* Interrupt VF to tell it a message has been sent and release buffer*/
686 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS);
687
688 /* update stats */
689 hw->mbx.stats.msgs_tx++;
690
691 out_no_write:
692 return ret_val;
693
694 }
695
696 /**
697 * ixgbe_read_mbx_pf - Read a message from the mailbox
698 * @hw: pointer to the HW structure
699 * @msg: The message buffer
700 * @size: Length of buffer
701 * @vf_number: the VF index
702 *
703 * This function copies a message from the mailbox buffer to the caller's
704 * memory buffer. The presumption is that the caller knows that there was
705 * a message due to a VF request so no polling for message is needed.
706 **/
ixgbe_read_mbx_pf(struct ixgbe_hw * hw,u32 * msg,u16 size,u16 vf_number)707 static s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
708 u16 vf_number)
709 {
710 s32 ret_val;
711 u16 i;
712
713 DEBUGFUNC("ixgbe_read_mbx_pf");
714
715 /* lock the mailbox to prevent pf/vf race condition */
716 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
717 if (ret_val)
718 goto out_no_read;
719
720 /* copy the message to the mailbox memory buffer */
721 for (i = 0; i < size; i++)
722 msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i);
723
724 /* Acknowledge the message and release buffer */
725 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK);
726
727 /* update stats */
728 hw->mbx.stats.msgs_rx++;
729
730 out_no_read:
731 return ret_val;
732 }
733
734 /**
735 * ixgbe_init_mbx_params_pf - set initial values for pf mailbox
736 * @hw: pointer to the HW structure
737 *
738 * Initializes the hw->mbx struct to correct values for pf mailbox
739 */
ixgbe_init_mbx_params_pf(struct ixgbe_hw * hw)740 void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw)
741 {
742 struct ixgbe_mbx_info *mbx = &hw->mbx;
743
744 if (hw->mac.type != ixgbe_mac_82599EB &&
745 hw->mac.type != ixgbe_mac_X550 &&
746 hw->mac.type != ixgbe_mac_X550EM_x &&
747 hw->mac.type != ixgbe_mac_X540)
748 return;
749
750 mbx->timeout = 0;
751 mbx->usec_delay = 0;
752
753 mbx->size = IXGBE_VFMAILBOX_SIZE;
754
755 mbx->ops.read = ixgbe_read_mbx_pf;
756 mbx->ops.write = ixgbe_write_mbx_pf;
757 mbx->ops.read_posted = ixgbe_read_posted_mbx;
758 mbx->ops.write_posted = ixgbe_write_posted_mbx;
759 mbx->ops.check_for_msg = ixgbe_check_for_msg_pf;
760 mbx->ops.check_for_ack = ixgbe_check_for_ack_pf;
761 mbx->ops.check_for_rst = ixgbe_check_for_rst_pf;
762
763 mbx->stats.msgs_tx = 0;
764 mbx->stats.msgs_rx = 0;
765 mbx->stats.reqs = 0;
766 mbx->stats.acks = 0;
767 mbx->stats.rsts = 0;
768 }
769