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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 | ||
34 | #include "ixgbe_type.h" | |
35 | #include "ixgbe_mbx.h" | |
36 | ||
37 | /** | |
38 | * ixgbe_read_mbx - Reads a message from the mailbox | |
39 | * @hw: pointer to the HW structure | |
40 | * @msg: The message buffer | |
41 | * @size: Length of buffer | |
42 | * @mbx_id: id of mailbox to read | |
43 | * | |
44 | * returns SUCCESS if it successfully read message from buffer | |
45 | **/ | |
46 | s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
47 | { | |
48 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
49 | s32 ret_val = IXGBE_ERR_MBX; | |
50 | ||
51 | DEBUGFUNC("ixgbe_read_mbx"); | |
52 | ||
53 | /* limit read to size of mailbox */ | |
54 | if (size > mbx->size) | |
55 | size = mbx->size; | |
56 | ||
57 | if (mbx->ops.read) | |
58 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); | |
59 | ||
60 | return ret_val; | |
61 | } | |
62 | ||
63 | /** | |
64 | * ixgbe_write_mbx - Write a message to the mailbox | |
65 | * @hw: pointer to the HW structure | |
66 | * @msg: The message buffer | |
67 | * @size: Length of buffer | |
68 | * @mbx_id: id of mailbox to write | |
69 | * | |
70 | * returns SUCCESS if it successfully copied message into the buffer | |
71 | **/ | |
72 | s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
73 | { | |
74 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
75 | s32 ret_val = IXGBE_SUCCESS; | |
76 | ||
77 | DEBUGFUNC("ixgbe_write_mbx"); | |
78 | ||
79 | if (size > mbx->size) { | |
80 | ret_val = IXGBE_ERR_MBX; | |
81 | ERROR_REPORT2(IXGBE_ERROR_ARGUMENT, | |
82 | "Invalid mailbox message size %d", size); | |
83 | } else if (mbx->ops.write) | |
84 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); | |
85 | ||
86 | return ret_val; | |
87 | } | |
88 | ||
89 | /** | |
90 | * ixgbe_check_for_msg - checks to see if someone sent us mail | |
91 | * @hw: pointer to the HW structure | |
92 | * @mbx_id: id of mailbox to check | |
93 | * | |
94 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
95 | **/ | |
96 | s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id) | |
97 | { | |
98 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
99 | s32 ret_val = IXGBE_ERR_MBX; | |
100 | ||
101 | DEBUGFUNC("ixgbe_check_for_msg"); | |
102 | ||
103 | if (mbx->ops.check_for_msg) | |
104 | ret_val = mbx->ops.check_for_msg(hw, mbx_id); | |
105 | ||
106 | return ret_val; | |
107 | } | |
108 | ||
109 | /** | |
110 | * ixgbe_check_for_ack - checks to see if someone sent us ACK | |
111 | * @hw: pointer to the HW structure | |
112 | * @mbx_id: id of mailbox to check | |
113 | * | |
114 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
115 | **/ | |
116 | s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id) | |
117 | { | |
118 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
119 | s32 ret_val = IXGBE_ERR_MBX; | |
120 | ||
121 | DEBUGFUNC("ixgbe_check_for_ack"); | |
122 | ||
123 | if (mbx->ops.check_for_ack) | |
124 | ret_val = mbx->ops.check_for_ack(hw, mbx_id); | |
125 | ||
126 | return ret_val; | |
127 | } | |
128 | ||
129 | /** | |
130 | * ixgbe_check_for_rst - checks to see if other side has reset | |
131 | * @hw: pointer to the HW structure | |
132 | * @mbx_id: id of mailbox to check | |
133 | * | |
134 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
135 | **/ | |
136 | s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id) | |
137 | { | |
138 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
139 | s32 ret_val = IXGBE_ERR_MBX; | |
140 | ||
141 | DEBUGFUNC("ixgbe_check_for_rst"); | |
142 | ||
143 | if (mbx->ops.check_for_rst) | |
144 | ret_val = mbx->ops.check_for_rst(hw, mbx_id); | |
145 | ||
146 | return ret_val; | |
147 | } | |
148 | ||
149 | /** | |
150 | * ixgbe_poll_for_msg - Wait for message notification | |
151 | * @hw: pointer to the HW structure | |
152 | * @mbx_id: id of mailbox to write | |
153 | * | |
154 | * returns SUCCESS if it successfully received a message notification | |
155 | **/ | |
156 | STATIC s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id) | |
157 | { | |
158 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
159 | int countdown = mbx->timeout; | |
160 | ||
161 | DEBUGFUNC("ixgbe_poll_for_msg"); | |
162 | ||
163 | if (!countdown || !mbx->ops.check_for_msg) | |
164 | goto out; | |
165 | ||
166 | while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) { | |
167 | countdown--; | |
168 | if (!countdown) | |
169 | break; | |
170 | usec_delay(mbx->usec_delay); | |
171 | } | |
172 | ||
173 | if (countdown == 0) | |
174 | ERROR_REPORT2(IXGBE_ERROR_POLLING, | |
175 | "Polling for VF%d mailbox message timedout", mbx_id); | |
176 | ||
177 | out: | |
178 | return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; | |
179 | } | |
180 | ||
181 | /** | |
182 | * ixgbe_poll_for_ack - Wait for message acknowledgement | |
183 | * @hw: pointer to the HW structure | |
184 | * @mbx_id: id of mailbox to write | |
185 | * | |
186 | * returns SUCCESS if it successfully received a message acknowledgement | |
187 | **/ | |
188 | STATIC s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id) | |
189 | { | |
190 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
191 | int countdown = mbx->timeout; | |
192 | ||
193 | DEBUGFUNC("ixgbe_poll_for_ack"); | |
194 | ||
195 | if (!countdown || !mbx->ops.check_for_ack) | |
196 | goto out; | |
197 | ||
198 | while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) { | |
199 | countdown--; | |
200 | if (!countdown) | |
201 | break; | |
202 | usec_delay(mbx->usec_delay); | |
203 | } | |
204 | ||
205 | if (countdown == 0) | |
206 | ERROR_REPORT2(IXGBE_ERROR_POLLING, | |
207 | "Polling for VF%d mailbox ack timedout", mbx_id); | |
208 | ||
209 | out: | |
210 | return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; | |
211 | } | |
212 | ||
213 | /** | |
214 | * ixgbe_read_posted_mbx - Wait for message notification and receive message | |
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 received a message notification and | |
221 | * copied it into the receive buffer. | |
222 | **/ | |
223 | s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
224 | { | |
225 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
226 | s32 ret_val = IXGBE_ERR_MBX; | |
227 | ||
228 | DEBUGFUNC("ixgbe_read_posted_mbx"); | |
229 | ||
230 | if (!mbx->ops.read) | |
231 | goto out; | |
232 | ||
233 | ret_val = ixgbe_poll_for_msg(hw, mbx_id); | |
234 | ||
235 | /* if ack received read message, otherwise we timed out */ | |
236 | if (!ret_val) | |
237 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); | |
238 | out: | |
239 | return ret_val; | |
240 | } | |
241 | ||
242 | /** | |
243 | * ixgbe_write_posted_mbx - Write a message to the mailbox, wait for ack | |
244 | * @hw: pointer to the HW structure | |
245 | * @msg: The message buffer | |
246 | * @size: Length of buffer | |
247 | * @mbx_id: id of mailbox to write | |
248 | * | |
249 | * returns SUCCESS if it successfully copied message into the buffer and | |
250 | * received an ack to that message within delay * timeout period | |
251 | **/ | |
252 | s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, | |
253 | u16 mbx_id) | |
254 | { | |
255 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
256 | s32 ret_val = IXGBE_ERR_MBX; | |
257 | ||
258 | DEBUGFUNC("ixgbe_write_posted_mbx"); | |
259 | ||
260 | /* exit if either we can't write or there isn't a defined timeout */ | |
261 | if (!mbx->ops.write || !mbx->timeout) | |
262 | goto out; | |
263 | ||
264 | /* send msg */ | |
265 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); | |
266 | ||
267 | /* if msg sent wait until we receive an ack */ | |
268 | if (!ret_val) | |
269 | ret_val = ixgbe_poll_for_ack(hw, mbx_id); | |
270 | out: | |
271 | return ret_val; | |
272 | } | |
273 | ||
274 | /** | |
275 | * ixgbe_init_mbx_ops_generic - Initialize MB function pointers | |
276 | * @hw: pointer to the HW structure | |
277 | * | |
278 | * Setups up the mailbox read and write message function pointers | |
279 | **/ | |
280 | void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw) | |
281 | { | |
282 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
283 | ||
284 | mbx->ops.read_posted = ixgbe_read_posted_mbx; | |
285 | mbx->ops.write_posted = ixgbe_write_posted_mbx; | |
286 | } | |
287 | ||
288 | /** | |
289 | * ixgbe_read_v2p_mailbox - read v2p mailbox | |
290 | * @hw: pointer to the HW structure | |
291 | * | |
292 | * This function is used to read the v2p mailbox without losing the read to | |
293 | * clear status bits. | |
294 | **/ | |
295 | STATIC u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw) | |
296 | { | |
297 | u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX); | |
298 | ||
299 | v2p_mailbox |= hw->mbx.v2p_mailbox; | |
300 | hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS; | |
301 | ||
302 | return v2p_mailbox; | |
303 | } | |
304 | ||
305 | /** | |
306 | * ixgbe_check_for_bit_vf - Determine if a status bit was set | |
307 | * @hw: pointer to the HW structure | |
308 | * @mask: bitmask for bits to be tested and cleared | |
309 | * | |
310 | * This function is used to check for the read to clear bits within | |
311 | * the V2P mailbox. | |
312 | **/ | |
313 | STATIC s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask) | |
314 | { | |
315 | u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw); | |
316 | s32 ret_val = IXGBE_ERR_MBX; | |
317 | ||
318 | if (v2p_mailbox & mask) | |
319 | ret_val = IXGBE_SUCCESS; | |
320 | ||
321 | hw->mbx.v2p_mailbox &= ~mask; | |
322 | ||
323 | return ret_val; | |
324 | } | |
325 | ||
326 | /** | |
327 | * ixgbe_check_for_msg_vf - checks to see if the PF has sent mail | |
328 | * @hw: pointer to the HW structure | |
329 | * @mbx_id: id of mailbox to check | |
330 | * | |
331 | * returns SUCCESS if the PF has set the Status bit or else ERR_MBX | |
332 | **/ | |
333 | STATIC s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id) | |
334 | { | |
335 | s32 ret_val = IXGBE_ERR_MBX; | |
336 | ||
337 | UNREFERENCED_1PARAMETER(mbx_id); | |
338 | DEBUGFUNC("ixgbe_check_for_msg_vf"); | |
339 | ||
340 | if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) { | |
341 | ret_val = IXGBE_SUCCESS; | |
342 | hw->mbx.stats.reqs++; | |
343 | } | |
344 | ||
345 | return ret_val; | |
346 | } | |
347 | ||
348 | /** | |
349 | * ixgbe_check_for_ack_vf - checks to see if the PF has ACK'd | |
350 | * @hw: pointer to the HW structure | |
351 | * @mbx_id: id of mailbox to check | |
352 | * | |
353 | * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX | |
354 | **/ | |
355 | STATIC s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id) | |
356 | { | |
357 | s32 ret_val = IXGBE_ERR_MBX; | |
358 | ||
359 | UNREFERENCED_1PARAMETER(mbx_id); | |
360 | DEBUGFUNC("ixgbe_check_for_ack_vf"); | |
361 | ||
362 | if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) { | |
363 | ret_val = IXGBE_SUCCESS; | |
364 | hw->mbx.stats.acks++; | |
365 | } | |
366 | ||
367 | return ret_val; | |
368 | } | |
369 | ||
370 | /** | |
371 | * ixgbe_check_for_rst_vf - checks to see if the PF has reset | |
372 | * @hw: pointer to the HW structure | |
373 | * @mbx_id: id of mailbox to check | |
374 | * | |
375 | * returns true if the PF has set the reset done bit or else false | |
376 | **/ | |
377 | STATIC s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id) | |
378 | { | |
379 | s32 ret_val = IXGBE_ERR_MBX; | |
380 | ||
381 | UNREFERENCED_1PARAMETER(mbx_id); | |
382 | DEBUGFUNC("ixgbe_check_for_rst_vf"); | |
383 | ||
384 | if (!ixgbe_check_for_bit_vf(hw, (IXGBE_VFMAILBOX_RSTD | | |
385 | IXGBE_VFMAILBOX_RSTI))) { | |
386 | ret_val = IXGBE_SUCCESS; | |
387 | hw->mbx.stats.rsts++; | |
388 | } | |
389 | ||
390 | return ret_val; | |
391 | } | |
392 | ||
393 | /** | |
394 | * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock | |
395 | * @hw: pointer to the HW structure | |
396 | * | |
397 | * return SUCCESS if we obtained the mailbox lock | |
398 | **/ | |
399 | STATIC s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw) | |
400 | { | |
401 | s32 ret_val = IXGBE_ERR_MBX; | |
402 | ||
403 | DEBUGFUNC("ixgbe_obtain_mbx_lock_vf"); | |
404 | ||
405 | /* Take ownership of the buffer */ | |
406 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU); | |
407 | ||
408 | /* reserve mailbox for vf use */ | |
409 | if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU) | |
410 | ret_val = IXGBE_SUCCESS; | |
411 | ||
412 | return ret_val; | |
413 | } | |
414 | ||
415 | /** | |
416 | * ixgbe_write_mbx_vf - Write a message to the mailbox | |
417 | * @hw: pointer to the HW structure | |
418 | * @msg: The message buffer | |
419 | * @size: Length of buffer | |
420 | * @mbx_id: id of mailbox to write | |
421 | * | |
422 | * returns SUCCESS if it successfully copied message into the buffer | |
423 | **/ | |
424 | STATIC s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, | |
425 | u16 mbx_id) | |
426 | { | |
427 | s32 ret_val; | |
428 | u16 i; | |
429 | ||
430 | UNREFERENCED_1PARAMETER(mbx_id); | |
431 | ||
432 | DEBUGFUNC("ixgbe_write_mbx_vf"); | |
433 | ||
434 | /* lock the mailbox to prevent pf/vf race condition */ | |
435 | ret_val = ixgbe_obtain_mbx_lock_vf(hw); | |
436 | if (ret_val) | |
437 | goto out_no_write; | |
438 | ||
439 | /* flush msg and acks as we are overwriting the message buffer */ | |
440 | ixgbe_check_for_msg_vf(hw, 0); | |
441 | ixgbe_check_for_ack_vf(hw, 0); | |
442 | ||
443 | /* copy the caller specified message to the mailbox memory buffer */ | |
444 | for (i = 0; i < size; i++) | |
445 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, msg[i]); | |
446 | ||
447 | /* | |
448 | * Complete the remaining mailbox data registers with zero to reset | |
449 | * the data sent in a previous exchange (in either side) with the PF, | |
450 | * including exchanges performed by another Guest OS to which that VF | |
451 | * was previously assigned. | |
452 | */ | |
453 | while (i < hw->mbx.size) { | |
454 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, 0); | |
455 | i++; | |
456 | } | |
457 | ||
458 | /* update stats */ | |
459 | hw->mbx.stats.msgs_tx++; | |
460 | ||
461 | /* Drop VFU and interrupt the PF to tell it a message has been sent */ | |
462 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ); | |
463 | ||
464 | out_no_write: | |
465 | return ret_val; | |
466 | } | |
467 | ||
468 | /** | |
469 | * ixgbe_read_mbx_vf - Reads a message from the inbox intended for vf | |
470 | * @hw: pointer to the HW structure | |
471 | * @msg: The message buffer | |
472 | * @size: Length of buffer | |
473 | * @mbx_id: id of mailbox to read | |
474 | * | |
475 | * returns SUCCESS if it successfully read message from buffer | |
476 | **/ | |
477 | STATIC s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, | |
478 | u16 mbx_id) | |
479 | { | |
480 | s32 ret_val = IXGBE_SUCCESS; | |
481 | u16 i; | |
482 | ||
483 | DEBUGFUNC("ixgbe_read_mbx_vf"); | |
484 | UNREFERENCED_1PARAMETER(mbx_id); | |
485 | ||
486 | /* lock the mailbox to prevent pf/vf race condition */ | |
487 | ret_val = ixgbe_obtain_mbx_lock_vf(hw); | |
488 | if (ret_val) | |
489 | goto out_no_read; | |
490 | ||
491 | /* copy the message from the mailbox memory buffer */ | |
492 | for (i = 0; i < size; i++) | |
493 | msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_VFMBMEM, i); | |
494 | ||
495 | /* Acknowledge receipt and release mailbox, then we're done */ | |
496 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK); | |
497 | ||
498 | /* update stats */ | |
499 | hw->mbx.stats.msgs_rx++; | |
500 | ||
501 | out_no_read: | |
502 | return ret_val; | |
503 | } | |
504 | ||
505 | /** | |
506 | * ixgbe_init_mbx_params_vf - set initial values for vf mailbox | |
507 | * @hw: pointer to the HW structure | |
508 | * | |
509 | * Initializes the hw->mbx struct to correct values for vf mailbox | |
510 | */ | |
511 | void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw) | |
512 | { | |
513 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
514 | ||
515 | /* start mailbox as timed out and let the reset_hw call set the timeout | |
516 | * value to begin communications */ | |
517 | mbx->timeout = 0; | |
518 | mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY; | |
519 | ||
520 | mbx->size = IXGBE_VFMAILBOX_SIZE; | |
521 | ||
522 | mbx->ops.read = ixgbe_read_mbx_vf; | |
523 | mbx->ops.write = ixgbe_write_mbx_vf; | |
524 | mbx->ops.read_posted = ixgbe_read_posted_mbx; | |
525 | mbx->ops.write_posted = ixgbe_write_posted_mbx; | |
526 | mbx->ops.check_for_msg = ixgbe_check_for_msg_vf; | |
527 | mbx->ops.check_for_ack = ixgbe_check_for_ack_vf; | |
528 | mbx->ops.check_for_rst = ixgbe_check_for_rst_vf; | |
529 | ||
530 | mbx->stats.msgs_tx = 0; | |
531 | mbx->stats.msgs_rx = 0; | |
532 | mbx->stats.reqs = 0; | |
533 | mbx->stats.acks = 0; | |
534 | mbx->stats.rsts = 0; | |
535 | } | |
536 | ||
537 | STATIC s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index) | |
538 | { | |
539 | u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index)); | |
540 | s32 ret_val = IXGBE_ERR_MBX; | |
541 | ||
542 | if (mbvficr & mask) { | |
543 | ret_val = IXGBE_SUCCESS; | |
544 | IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask); | |
545 | } | |
546 | ||
547 | return ret_val; | |
548 | } | |
549 | ||
550 | /** | |
551 | * ixgbe_check_for_msg_pf - checks to see if the VF has sent mail | |
552 | * @hw: pointer to the HW structure | |
553 | * @vf_number: the VF index | |
554 | * | |
555 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
556 | **/ | |
557 | STATIC s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number) | |
558 | { | |
559 | s32 ret_val = IXGBE_ERR_MBX; | |
560 | s32 index = IXGBE_MBVFICR_INDEX(vf_number); | |
561 | u32 vf_bit = vf_number % 16; | |
562 | ||
563 | DEBUGFUNC("ixgbe_check_for_msg_pf"); | |
564 | ||
565 | if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit, | |
566 | index)) { | |
567 | ret_val = IXGBE_SUCCESS; | |
568 | hw->mbx.stats.reqs++; | |
569 | } | |
570 | ||
571 | return ret_val; | |
572 | } | |
573 | ||
574 | /** | |
575 | * ixgbe_check_for_ack_pf - checks to see if the VF has ACKed | |
576 | * @hw: pointer to the HW structure | |
577 | * @vf_number: the VF index | |
578 | * | |
579 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
580 | **/ | |
581 | STATIC s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number) | |
582 | { | |
583 | s32 ret_val = IXGBE_ERR_MBX; | |
584 | s32 index = IXGBE_MBVFICR_INDEX(vf_number); | |
585 | u32 vf_bit = vf_number % 16; | |
586 | ||
587 | DEBUGFUNC("ixgbe_check_for_ack_pf"); | |
588 | ||
589 | if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit, | |
590 | index)) { | |
591 | ret_val = IXGBE_SUCCESS; | |
592 | hw->mbx.stats.acks++; | |
593 | } | |
594 | ||
595 | return ret_val; | |
596 | } | |
597 | ||
598 | /** | |
599 | * ixgbe_check_for_rst_pf - checks to see if the VF has reset | |
600 | * @hw: pointer to the HW structure | |
601 | * @vf_number: the VF index | |
602 | * | |
603 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
604 | **/ | |
605 | STATIC s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number) | |
606 | { | |
607 | u32 reg_offset = (vf_number < 32) ? 0 : 1; | |
608 | u32 vf_shift = vf_number % 32; | |
609 | u32 vflre = 0; | |
610 | s32 ret_val = IXGBE_ERR_MBX; | |
611 | ||
612 | DEBUGFUNC("ixgbe_check_for_rst_pf"); | |
613 | ||
614 | switch (hw->mac.type) { | |
615 | case ixgbe_mac_82599EB: | |
616 | vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset)); | |
617 | break; | |
618 | case ixgbe_mac_X550: | |
619 | case ixgbe_mac_X550EM_x: | |
620 | case ixgbe_mac_X550EM_a: | |
621 | case ixgbe_mac_X540: | |
622 | vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset)); | |
623 | break; | |
624 | default: | |
625 | break; | |
626 | } | |
627 | ||
628 | if (vflre & (1 << vf_shift)) { | |
629 | ret_val = IXGBE_SUCCESS; | |
630 | IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift)); | |
631 | hw->mbx.stats.rsts++; | |
632 | } | |
633 | ||
634 | return ret_val; | |
635 | } | |
636 | ||
637 | /** | |
638 | * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock | |
639 | * @hw: pointer to the HW structure | |
640 | * @vf_number: the VF index | |
641 | * | |
642 | * return SUCCESS if we obtained the mailbox lock | |
643 | **/ | |
644 | STATIC s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number) | |
645 | { | |
646 | s32 ret_val = IXGBE_ERR_MBX; | |
647 | u32 p2v_mailbox; | |
648 | ||
649 | DEBUGFUNC("ixgbe_obtain_mbx_lock_pf"); | |
650 | ||
651 | /* Take ownership of the buffer */ | |
652 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU); | |
653 | ||
654 | /* reserve mailbox for vf use */ | |
655 | p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number)); | |
656 | if (p2v_mailbox & IXGBE_PFMAILBOX_PFU) | |
657 | ret_val = IXGBE_SUCCESS; | |
658 | else | |
659 | ERROR_REPORT2(IXGBE_ERROR_POLLING, | |
660 | "Failed to obtain mailbox lock for VF%d", vf_number); | |
661 | ||
662 | ||
663 | return ret_val; | |
664 | } | |
665 | ||
666 | /** | |
667 | * ixgbe_write_mbx_pf - Places a message in the mailbox | |
668 | * @hw: pointer to the HW structure | |
669 | * @msg: The message buffer | |
670 | * @size: Length of buffer | |
671 | * @vf_number: the VF index | |
672 | * | |
673 | * returns SUCCESS if it successfully copied message into the buffer | |
674 | **/ | |
675 | STATIC s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, | |
676 | u16 vf_number) | |
677 | { | |
678 | s32 ret_val; | |
679 | u16 i; | |
680 | ||
681 | DEBUGFUNC("ixgbe_write_mbx_pf"); | |
682 | ||
683 | /* lock the mailbox to prevent pf/vf race condition */ | |
684 | ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); | |
685 | if (ret_val) | |
686 | goto out_no_write; | |
687 | ||
688 | /* flush msg and acks as we are overwriting the message buffer */ | |
689 | ixgbe_check_for_msg_pf(hw, vf_number); | |
690 | ixgbe_check_for_ack_pf(hw, vf_number); | |
691 | ||
692 | /* copy the caller specified message to the mailbox memory buffer */ | |
693 | for (i = 0; i < size; i++) | |
694 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]); | |
695 | ||
696 | /* | |
697 | * Complete the remaining mailbox data registers with zero to reset | |
698 | * the data sent in a previous exchange (in either side) with the VF, | |
699 | * including exchanges performed by another Guest OS to which that VF | |
700 | * was previously assigned. | |
701 | */ | |
702 | while (i < hw->mbx.size) { | |
703 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, 0); | |
704 | i++; | |
705 | } | |
706 | ||
707 | /* Interrupt VF to tell it a message has been sent and release buffer*/ | |
708 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS); | |
709 | ||
710 | /* update stats */ | |
711 | hw->mbx.stats.msgs_tx++; | |
712 | ||
713 | out_no_write: | |
714 | return ret_val; | |
715 | ||
716 | } | |
717 | ||
718 | /** | |
719 | * ixgbe_read_mbx_pf - Read a message from the mailbox | |
720 | * @hw: pointer to the HW structure | |
721 | * @msg: The message buffer | |
722 | * @size: Length of buffer | |
723 | * @vf_number: the VF index | |
724 | * | |
725 | * This function copies a message from the mailbox buffer to the caller's | |
726 | * memory buffer. The presumption is that the caller knows that there was | |
727 | * a message due to a VF request so no polling for message is needed. | |
728 | **/ | |
729 | STATIC s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, | |
730 | u16 vf_number) | |
731 | { | |
732 | s32 ret_val; | |
733 | u16 i; | |
734 | ||
735 | DEBUGFUNC("ixgbe_read_mbx_pf"); | |
736 | ||
737 | /* lock the mailbox to prevent pf/vf race condition */ | |
738 | ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); | |
739 | if (ret_val) | |
740 | goto out_no_read; | |
741 | ||
742 | /* copy the message to the mailbox memory buffer */ | |
743 | for (i = 0; i < size; i++) | |
744 | msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i); | |
745 | ||
746 | /* Acknowledge the message and release buffer */ | |
747 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK); | |
748 | ||
749 | /* update stats */ | |
750 | hw->mbx.stats.msgs_rx++; | |
751 | ||
752 | out_no_read: | |
753 | return ret_val; | |
754 | } | |
755 | ||
756 | /** | |
757 | * ixgbe_init_mbx_params_pf - set initial values for pf mailbox | |
758 | * @hw: pointer to the HW structure | |
759 | * | |
760 | * Initializes the hw->mbx struct to correct values for pf mailbox | |
761 | */ | |
762 | void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw) | |
763 | { | |
764 | struct ixgbe_mbx_info *mbx = &hw->mbx; | |
765 | ||
766 | if (hw->mac.type != ixgbe_mac_82599EB && | |
767 | hw->mac.type != ixgbe_mac_X550 && | |
768 | hw->mac.type != ixgbe_mac_X550EM_x && | |
769 | hw->mac.type != ixgbe_mac_X550EM_a && | |
770 | hw->mac.type != ixgbe_mac_X540) | |
771 | return; | |
772 | ||
773 | mbx->timeout = 0; | |
774 | mbx->usec_delay = 0; | |
775 | ||
776 | mbx->size = IXGBE_VFMAILBOX_SIZE; | |
777 | ||
778 | mbx->ops.read = ixgbe_read_mbx_pf; | |
779 | mbx->ops.write = ixgbe_write_mbx_pf; | |
780 | mbx->ops.read_posted = ixgbe_read_posted_mbx; | |
781 | mbx->ops.write_posted = ixgbe_write_posted_mbx; | |
782 | mbx->ops.check_for_msg = ixgbe_check_for_msg_pf; | |
783 | mbx->ops.check_for_ack = ixgbe_check_for_ack_pf; | |
784 | mbx->ops.check_for_rst = ixgbe_check_for_rst_pf; | |
785 | ||
786 | mbx->stats.msgs_tx = 0; | |
787 | mbx->stats.msgs_rx = 0; | |
788 | mbx->stats.reqs = 0; | |
789 | mbx->stats.acks = 0; | |
790 | mbx->stats.rsts = 0; | |
791 | } |