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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 "e1000_mbx.h" | |
35 | ||
36 | /** | |
37 | * e1000_null_mbx_check_for_flag - No-op function, return 0 | |
38 | * @hw: pointer to the HW structure | |
39 | **/ | |
40 | STATIC s32 e1000_null_mbx_check_for_flag(struct e1000_hw E1000_UNUSEDARG *hw, | |
41 | u16 E1000_UNUSEDARG mbx_id) | |
42 | { | |
43 | DEBUGFUNC("e1000_null_mbx_check_flag"); | |
44 | UNREFERENCED_2PARAMETER(hw, mbx_id); | |
45 | ||
46 | return E1000_SUCCESS; | |
47 | } | |
48 | ||
49 | /** | |
50 | * e1000_null_mbx_transact - No-op function, return 0 | |
51 | * @hw: pointer to the HW structure | |
52 | **/ | |
53 | STATIC s32 e1000_null_mbx_transact(struct e1000_hw E1000_UNUSEDARG *hw, | |
54 | u32 E1000_UNUSEDARG *msg, | |
55 | u16 E1000_UNUSEDARG size, | |
56 | u16 E1000_UNUSEDARG mbx_id) | |
57 | { | |
58 | DEBUGFUNC("e1000_null_mbx_rw_msg"); | |
59 | UNREFERENCED_4PARAMETER(hw, msg, size, mbx_id); | |
60 | ||
61 | return E1000_SUCCESS; | |
62 | } | |
63 | ||
64 | /** | |
65 | * e1000_read_mbx - Reads a message from 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 read | |
70 | * | |
71 | * returns SUCCESS if it successfully read message from buffer | |
72 | **/ | |
73 | s32 e1000_read_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
74 | { | |
75 | struct e1000_mbx_info *mbx = &hw->mbx; | |
76 | s32 ret_val = -E1000_ERR_MBX; | |
77 | ||
78 | DEBUGFUNC("e1000_read_mbx"); | |
79 | ||
80 | /* limit read to size of mailbox */ | |
81 | if (size > mbx->size) | |
82 | size = mbx->size; | |
83 | ||
84 | if (mbx->ops.read) | |
85 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); | |
86 | ||
87 | return ret_val; | |
88 | } | |
89 | ||
90 | /** | |
91 | * e1000_write_mbx - Write a message to the mailbox | |
92 | * @hw: pointer to the HW structure | |
93 | * @msg: The message buffer | |
94 | * @size: Length of buffer | |
95 | * @mbx_id: id of mailbox to write | |
96 | * | |
97 | * returns SUCCESS if it successfully copied message into the buffer | |
98 | **/ | |
99 | s32 e1000_write_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
100 | { | |
101 | struct e1000_mbx_info *mbx = &hw->mbx; | |
102 | s32 ret_val = E1000_SUCCESS; | |
103 | ||
104 | DEBUGFUNC("e1000_write_mbx"); | |
105 | ||
106 | if (size > mbx->size) | |
107 | ret_val = -E1000_ERR_MBX; | |
108 | ||
109 | else if (mbx->ops.write) | |
110 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); | |
111 | ||
112 | return ret_val; | |
113 | } | |
114 | ||
115 | /** | |
116 | * e1000_check_for_msg - checks to see if someone sent us mail | |
117 | * @hw: pointer to the HW structure | |
118 | * @mbx_id: id of mailbox to check | |
119 | * | |
120 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
121 | **/ | |
122 | s32 e1000_check_for_msg(struct e1000_hw *hw, u16 mbx_id) | |
123 | { | |
124 | struct e1000_mbx_info *mbx = &hw->mbx; | |
125 | s32 ret_val = -E1000_ERR_MBX; | |
126 | ||
127 | DEBUGFUNC("e1000_check_for_msg"); | |
128 | ||
129 | if (mbx->ops.check_for_msg) | |
130 | ret_val = mbx->ops.check_for_msg(hw, mbx_id); | |
131 | ||
132 | return ret_val; | |
133 | } | |
134 | ||
135 | /** | |
136 | * e1000_check_for_ack - checks to see if someone sent us ACK | |
137 | * @hw: pointer to the HW structure | |
138 | * @mbx_id: id of mailbox to check | |
139 | * | |
140 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
141 | **/ | |
142 | s32 e1000_check_for_ack(struct e1000_hw *hw, u16 mbx_id) | |
143 | { | |
144 | struct e1000_mbx_info *mbx = &hw->mbx; | |
145 | s32 ret_val = -E1000_ERR_MBX; | |
146 | ||
147 | DEBUGFUNC("e1000_check_for_ack"); | |
148 | ||
149 | if (mbx->ops.check_for_ack) | |
150 | ret_val = mbx->ops.check_for_ack(hw, mbx_id); | |
151 | ||
152 | return ret_val; | |
153 | } | |
154 | ||
155 | /** | |
156 | * e1000_check_for_rst - checks to see if other side has reset | |
157 | * @hw: pointer to the HW structure | |
158 | * @mbx_id: id of mailbox to check | |
159 | * | |
160 | * returns SUCCESS if the Status bit was found or else ERR_MBX | |
161 | **/ | |
162 | s32 e1000_check_for_rst(struct e1000_hw *hw, u16 mbx_id) | |
163 | { | |
164 | struct e1000_mbx_info *mbx = &hw->mbx; | |
165 | s32 ret_val = -E1000_ERR_MBX; | |
166 | ||
167 | DEBUGFUNC("e1000_check_for_rst"); | |
168 | ||
169 | if (mbx->ops.check_for_rst) | |
170 | ret_val = mbx->ops.check_for_rst(hw, mbx_id); | |
171 | ||
172 | return ret_val; | |
173 | } | |
174 | ||
175 | /** | |
176 | * e1000_poll_for_msg - Wait for message notification | |
177 | * @hw: pointer to the HW structure | |
178 | * @mbx_id: id of mailbox to write | |
179 | * | |
180 | * returns SUCCESS if it successfully received a message notification | |
181 | **/ | |
182 | STATIC s32 e1000_poll_for_msg(struct e1000_hw *hw, u16 mbx_id) | |
183 | { | |
184 | struct e1000_mbx_info *mbx = &hw->mbx; | |
185 | int countdown = mbx->timeout; | |
186 | ||
187 | DEBUGFUNC("e1000_poll_for_msg"); | |
188 | ||
189 | if (!countdown || !mbx->ops.check_for_msg) | |
190 | goto out; | |
191 | ||
192 | while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) { | |
193 | countdown--; | |
194 | if (!countdown) | |
195 | break; | |
196 | usec_delay(mbx->usec_delay); | |
197 | } | |
198 | ||
199 | /* if we failed, all future posted messages fail until reset */ | |
200 | if (!countdown) | |
201 | mbx->timeout = 0; | |
202 | out: | |
203 | return countdown ? E1000_SUCCESS : -E1000_ERR_MBX; | |
204 | } | |
205 | ||
206 | /** | |
207 | * e1000_poll_for_ack - Wait for message acknowledgement | |
208 | * @hw: pointer to the HW structure | |
209 | * @mbx_id: id of mailbox to write | |
210 | * | |
211 | * returns SUCCESS if it successfully received a message acknowledgement | |
212 | **/ | |
213 | STATIC s32 e1000_poll_for_ack(struct e1000_hw *hw, u16 mbx_id) | |
214 | { | |
215 | struct e1000_mbx_info *mbx = &hw->mbx; | |
216 | int countdown = mbx->timeout; | |
217 | ||
218 | DEBUGFUNC("e1000_poll_for_ack"); | |
219 | ||
220 | if (!countdown || !mbx->ops.check_for_ack) | |
221 | goto out; | |
222 | ||
223 | while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) { | |
224 | countdown--; | |
225 | if (!countdown) | |
226 | break; | |
227 | usec_delay(mbx->usec_delay); | |
228 | } | |
229 | ||
230 | /* if we failed, all future posted messages fail until reset */ | |
231 | if (!countdown) | |
232 | mbx->timeout = 0; | |
233 | out: | |
234 | return countdown ? E1000_SUCCESS : -E1000_ERR_MBX; | |
235 | } | |
236 | ||
237 | /** | |
238 | * e1000_read_posted_mbx - Wait for message notification and receive message | |
239 | * @hw: pointer to the HW structure | |
240 | * @msg: The message buffer | |
241 | * @size: Length of buffer | |
242 | * @mbx_id: id of mailbox to write | |
243 | * | |
244 | * returns SUCCESS if it successfully received a message notification and | |
245 | * copied it into the receive buffer. | |
246 | **/ | |
247 | s32 e1000_read_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
248 | { | |
249 | struct e1000_mbx_info *mbx = &hw->mbx; | |
250 | s32 ret_val = -E1000_ERR_MBX; | |
251 | ||
252 | DEBUGFUNC("e1000_read_posted_mbx"); | |
253 | ||
254 | if (!mbx->ops.read) | |
255 | goto out; | |
256 | ||
257 | ret_val = e1000_poll_for_msg(hw, mbx_id); | |
258 | ||
259 | /* if ack received read message, otherwise we timed out */ | |
260 | if (!ret_val) | |
261 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); | |
262 | out: | |
263 | return ret_val; | |
264 | } | |
265 | ||
266 | /** | |
267 | * e1000_write_posted_mbx - Write a message to the mailbox, wait for ack | |
268 | * @hw: pointer to the HW structure | |
269 | * @msg: The message buffer | |
270 | * @size: Length of buffer | |
271 | * @mbx_id: id of mailbox to write | |
272 | * | |
273 | * returns SUCCESS if it successfully copied message into the buffer and | |
274 | * received an ack to that message within delay * timeout period | |
275 | **/ | |
276 | s32 e1000_write_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id) | |
277 | { | |
278 | struct e1000_mbx_info *mbx = &hw->mbx; | |
279 | s32 ret_val = -E1000_ERR_MBX; | |
280 | ||
281 | DEBUGFUNC("e1000_write_posted_mbx"); | |
282 | ||
283 | /* exit if either we can't write or there isn't a defined timeout */ | |
284 | if (!mbx->ops.write || !mbx->timeout) | |
285 | goto out; | |
286 | ||
287 | /* send msg */ | |
288 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); | |
289 | ||
290 | /* if msg sent wait until we receive an ack */ | |
291 | if (!ret_val) | |
292 | ret_val = e1000_poll_for_ack(hw, mbx_id); | |
293 | out: | |
294 | return ret_val; | |
295 | } | |
296 | ||
297 | /** | |
298 | * e1000_init_mbx_ops_generic - Initialize mbx function pointers | |
299 | * @hw: pointer to the HW structure | |
300 | * | |
301 | * Sets the function pointers to no-op functions | |
302 | **/ | |
303 | void e1000_init_mbx_ops_generic(struct e1000_hw *hw) | |
304 | { | |
305 | struct e1000_mbx_info *mbx = &hw->mbx; | |
306 | mbx->ops.init_params = e1000_null_ops_generic; | |
307 | mbx->ops.read = e1000_null_mbx_transact; | |
308 | mbx->ops.write = e1000_null_mbx_transact; | |
309 | mbx->ops.check_for_msg = e1000_null_mbx_check_for_flag; | |
310 | mbx->ops.check_for_ack = e1000_null_mbx_check_for_flag; | |
311 | mbx->ops.check_for_rst = e1000_null_mbx_check_for_flag; | |
312 | mbx->ops.read_posted = e1000_read_posted_mbx; | |
313 | mbx->ops.write_posted = e1000_write_posted_mbx; | |
314 | } | |
315 | ||
316 | /** | |
317 | * e1000_read_v2p_mailbox - read v2p mailbox | |
318 | * @hw: pointer to the HW structure | |
319 | * | |
320 | * This function is used to read the v2p mailbox without losing the read to | |
321 | * clear status bits. | |
322 | **/ | |
323 | STATIC u32 e1000_read_v2p_mailbox(struct e1000_hw *hw) | |
324 | { | |
325 | u32 v2p_mailbox = E1000_READ_REG(hw, E1000_V2PMAILBOX(0)); | |
326 | ||
327 | v2p_mailbox |= hw->dev_spec.vf.v2p_mailbox; | |
328 | hw->dev_spec.vf.v2p_mailbox |= v2p_mailbox & E1000_V2PMAILBOX_R2C_BITS; | |
329 | ||
330 | return v2p_mailbox; | |
331 | } | |
332 | ||
333 | /** | |
334 | * e1000_check_for_bit_vf - Determine if a status bit was set | |
335 | * @hw: pointer to the HW structure | |
336 | * @mask: bitmask for bits to be tested and cleared | |
337 | * | |
338 | * This function is used to check for the read to clear bits within | |
339 | * the V2P mailbox. | |
340 | **/ | |
341 | STATIC s32 e1000_check_for_bit_vf(struct e1000_hw *hw, u32 mask) | |
342 | { | |
343 | u32 v2p_mailbox = e1000_read_v2p_mailbox(hw); | |
344 | s32 ret_val = -E1000_ERR_MBX; | |
345 | ||
346 | if (v2p_mailbox & mask) | |
347 | ret_val = E1000_SUCCESS; | |
348 | ||
349 | hw->dev_spec.vf.v2p_mailbox &= ~mask; | |
350 | ||
351 | return ret_val; | |
352 | } | |
353 | ||
354 | /** | |
355 | * e1000_check_for_msg_vf - checks to see if the PF has sent mail | |
356 | * @hw: pointer to the HW structure | |
357 | * @mbx_id: id of mailbox to check | |
358 | * | |
359 | * returns SUCCESS if the PF has set the Status bit or else ERR_MBX | |
360 | **/ | |
361 | STATIC s32 e1000_check_for_msg_vf(struct e1000_hw *hw, | |
362 | u16 E1000_UNUSEDARG mbx_id) | |
363 | { | |
364 | s32 ret_val = -E1000_ERR_MBX; | |
365 | ||
366 | UNREFERENCED_1PARAMETER(mbx_id); | |
367 | DEBUGFUNC("e1000_check_for_msg_vf"); | |
368 | ||
369 | if (!e1000_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFSTS)) { | |
370 | ret_val = E1000_SUCCESS; | |
371 | hw->mbx.stats.reqs++; | |
372 | } | |
373 | ||
374 | return ret_val; | |
375 | } | |
376 | ||
377 | /** | |
378 | * e1000_check_for_ack_vf - checks to see if the PF has ACK'd | |
379 | * @hw: pointer to the HW structure | |
380 | * @mbx_id: id of mailbox to check | |
381 | * | |
382 | * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX | |
383 | **/ | |
384 | STATIC s32 e1000_check_for_ack_vf(struct e1000_hw *hw, | |
385 | u16 E1000_UNUSEDARG mbx_id) | |
386 | { | |
387 | s32 ret_val = -E1000_ERR_MBX; | |
388 | ||
389 | UNREFERENCED_1PARAMETER(mbx_id); | |
390 | DEBUGFUNC("e1000_check_for_ack_vf"); | |
391 | ||
392 | if (!e1000_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFACK)) { | |
393 | ret_val = E1000_SUCCESS; | |
394 | hw->mbx.stats.acks++; | |
395 | } | |
396 | ||
397 | return ret_val; | |
398 | } | |
399 | ||
400 | /** | |
401 | * e1000_check_for_rst_vf - checks to see if the PF has reset | |
402 | * @hw: pointer to the HW structure | |
403 | * @mbx_id: id of mailbox to check | |
404 | * | |
405 | * returns true if the PF has set the reset done bit or else false | |
406 | **/ | |
407 | STATIC s32 e1000_check_for_rst_vf(struct e1000_hw *hw, | |
408 | u16 E1000_UNUSEDARG mbx_id) | |
409 | { | |
410 | s32 ret_val = -E1000_ERR_MBX; | |
411 | ||
412 | UNREFERENCED_1PARAMETER(mbx_id); | |
413 | DEBUGFUNC("e1000_check_for_rst_vf"); | |
414 | ||
415 | if (!e1000_check_for_bit_vf(hw, (E1000_V2PMAILBOX_RSTD | | |
416 | E1000_V2PMAILBOX_RSTI))) { | |
417 | ret_val = E1000_SUCCESS; | |
418 | hw->mbx.stats.rsts++; | |
419 | } | |
420 | ||
421 | return ret_val; | |
422 | } | |
423 | ||
424 | /** | |
425 | * e1000_obtain_mbx_lock_vf - obtain mailbox lock | |
426 | * @hw: pointer to the HW structure | |
427 | * | |
428 | * return SUCCESS if we obtained the mailbox lock | |
429 | **/ | |
430 | STATIC s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw) | |
431 | { | |
432 | s32 ret_val = -E1000_ERR_MBX; | |
433 | ||
434 | DEBUGFUNC("e1000_obtain_mbx_lock_vf"); | |
435 | ||
436 | /* Take ownership of the buffer */ | |
437 | E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU); | |
438 | ||
439 | /* reserve mailbox for vf use */ | |
440 | if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) | |
441 | ret_val = E1000_SUCCESS; | |
442 | ||
443 | return ret_val; | |
444 | } | |
445 | ||
446 | /** | |
447 | * e1000_write_mbx_vf - Write a message to the mailbox | |
448 | * @hw: pointer to the HW structure | |
449 | * @msg: The message buffer | |
450 | * @size: Length of buffer | |
451 | * @mbx_id: id of mailbox to write | |
452 | * | |
453 | * returns SUCCESS if it successfully copied message into the buffer | |
454 | **/ | |
455 | STATIC s32 e1000_write_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size, | |
456 | u16 E1000_UNUSEDARG mbx_id) | |
457 | { | |
458 | s32 ret_val; | |
459 | u16 i; | |
460 | ||
461 | UNREFERENCED_1PARAMETER(mbx_id); | |
462 | ||
463 | DEBUGFUNC("e1000_write_mbx_vf"); | |
464 | ||
465 | /* lock the mailbox to prevent pf/vf race condition */ | |
466 | ret_val = e1000_obtain_mbx_lock_vf(hw); | |
467 | if (ret_val) | |
468 | goto out_no_write; | |
469 | ||
470 | /* flush msg and acks as we are overwriting the message buffer */ | |
471 | e1000_check_for_msg_vf(hw, 0); | |
472 | e1000_check_for_ack_vf(hw, 0); | |
473 | ||
474 | /* copy the caller specified message to the mailbox memory buffer */ | |
475 | for (i = 0; i < size; i++) | |
476 | E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(0), i, msg[i]); | |
477 | ||
478 | /* update stats */ | |
479 | hw->mbx.stats.msgs_tx++; | |
480 | ||
481 | /* Drop VFU and interrupt the PF to tell it a message has been sent */ | |
482 | E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_REQ); | |
483 | ||
484 | out_no_write: | |
485 | return ret_val; | |
486 | } | |
487 | ||
488 | /** | |
489 | * e1000_read_mbx_vf - Reads a message from the inbox intended for vf | |
490 | * @hw: pointer to the HW structure | |
491 | * @msg: The message buffer | |
492 | * @size: Length of buffer | |
493 | * @mbx_id: id of mailbox to read | |
494 | * | |
495 | * returns SUCCESS if it successfully read message from buffer | |
496 | **/ | |
497 | STATIC s32 e1000_read_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size, | |
498 | u16 E1000_UNUSEDARG mbx_id) | |
499 | { | |
500 | s32 ret_val = E1000_SUCCESS; | |
501 | u16 i; | |
502 | ||
503 | DEBUGFUNC("e1000_read_mbx_vf"); | |
504 | UNREFERENCED_1PARAMETER(mbx_id); | |
505 | ||
506 | /* lock the mailbox to prevent pf/vf race condition */ | |
507 | ret_val = e1000_obtain_mbx_lock_vf(hw); | |
508 | if (ret_val) | |
509 | goto out_no_read; | |
510 | ||
511 | /* copy the message from the mailbox memory buffer */ | |
512 | for (i = 0; i < size; i++) | |
513 | msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(0), i); | |
514 | ||
515 | /* Acknowledge receipt and release mailbox, then we're done */ | |
516 | E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_ACK); | |
517 | ||
518 | /* update stats */ | |
519 | hw->mbx.stats.msgs_rx++; | |
520 | ||
521 | out_no_read: | |
522 | return ret_val; | |
523 | } | |
524 | ||
525 | /** | |
526 | * e1000_init_mbx_params_vf - set initial values for vf mailbox | |
527 | * @hw: pointer to the HW structure | |
528 | * | |
529 | * Initializes the hw->mbx struct to correct values for vf mailbox | |
530 | */ | |
531 | s32 e1000_init_mbx_params_vf(struct e1000_hw *hw) | |
532 | { | |
533 | struct e1000_mbx_info *mbx = &hw->mbx; | |
534 | ||
535 | /* start mailbox as timed out and let the reset_hw call set the timeout | |
536 | * value to begin communications */ | |
537 | mbx->timeout = 0; | |
538 | mbx->usec_delay = E1000_VF_MBX_INIT_DELAY; | |
539 | ||
540 | mbx->size = E1000_VFMAILBOX_SIZE; | |
541 | ||
542 | mbx->ops.read = e1000_read_mbx_vf; | |
543 | mbx->ops.write = e1000_write_mbx_vf; | |
544 | mbx->ops.read_posted = e1000_read_posted_mbx; | |
545 | mbx->ops.write_posted = e1000_write_posted_mbx; | |
546 | mbx->ops.check_for_msg = e1000_check_for_msg_vf; | |
547 | mbx->ops.check_for_ack = e1000_check_for_ack_vf; | |
548 | mbx->ops.check_for_rst = e1000_check_for_rst_vf; | |
549 | ||
550 | mbx->stats.msgs_tx = 0; | |
551 | mbx->stats.msgs_rx = 0; | |
552 | mbx->stats.reqs = 0; | |
553 | mbx->stats.acks = 0; | |
554 | mbx->stats.rsts = 0; | |
555 | ||
556 | return E1000_SUCCESS; | |
557 | } | |
558 | ||
559 | STATIC s32 e1000_check_for_bit_pf(struct e1000_hw *hw, u32 mask) | |
560 | { | |
561 | u32 mbvficr = E1000_READ_REG(hw, E1000_MBVFICR); | |
562 | s32 ret_val = -E1000_ERR_MBX; | |
563 | ||
564 | if (mbvficr & mask) { | |
565 | ret_val = E1000_SUCCESS; | |
566 | E1000_WRITE_REG(hw, E1000_MBVFICR, mask); | |
567 | } | |
568 | ||
569 | return ret_val; | |
570 | } | |
571 | ||
572 | /** | |
573 | * e1000_check_for_msg_pf - checks to see if the VF has sent mail | |
574 | * @hw: pointer to the HW structure | |
575 | * @vf_number: the VF index | |
576 | * | |
577 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
578 | **/ | |
579 | STATIC s32 e1000_check_for_msg_pf(struct e1000_hw *hw, u16 vf_number) | |
580 | { | |
581 | s32 ret_val = -E1000_ERR_MBX; | |
582 | ||
583 | DEBUGFUNC("e1000_check_for_msg_pf"); | |
584 | ||
585 | if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFREQ_VF1 << vf_number)) { | |
586 | ret_val = E1000_SUCCESS; | |
587 | hw->mbx.stats.reqs++; | |
588 | } | |
589 | ||
590 | return ret_val; | |
591 | } | |
592 | ||
593 | /** | |
594 | * e1000_check_for_ack_pf - checks to see if the VF has ACKed | |
595 | * @hw: pointer to the HW structure | |
596 | * @vf_number: the VF index | |
597 | * | |
598 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
599 | **/ | |
600 | STATIC s32 e1000_check_for_ack_pf(struct e1000_hw *hw, u16 vf_number) | |
601 | { | |
602 | s32 ret_val = -E1000_ERR_MBX; | |
603 | ||
604 | DEBUGFUNC("e1000_check_for_ack_pf"); | |
605 | ||
606 | if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFACK_VF1 << vf_number)) { | |
607 | ret_val = E1000_SUCCESS; | |
608 | hw->mbx.stats.acks++; | |
609 | } | |
610 | ||
611 | return ret_val; | |
612 | } | |
613 | ||
614 | /** | |
615 | * e1000_check_for_rst_pf - checks to see if the VF has reset | |
616 | * @hw: pointer to the HW structure | |
617 | * @vf_number: the VF index | |
618 | * | |
619 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX | |
620 | **/ | |
621 | STATIC s32 e1000_check_for_rst_pf(struct e1000_hw *hw, u16 vf_number) | |
622 | { | |
623 | u32 vflre = E1000_READ_REG(hw, E1000_VFLRE); | |
624 | s32 ret_val = -E1000_ERR_MBX; | |
625 | ||
626 | DEBUGFUNC("e1000_check_for_rst_pf"); | |
627 | ||
628 | if (vflre & (1 << vf_number)) { | |
629 | ret_val = E1000_SUCCESS; | |
630 | E1000_WRITE_REG(hw, E1000_VFLRE, (1 << vf_number)); | |
631 | hw->mbx.stats.rsts++; | |
632 | } | |
633 | ||
634 | return ret_val; | |
635 | } | |
636 | ||
637 | /** | |
638 | * e1000_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 e1000_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number) | |
645 | { | |
646 | s32 ret_val = -E1000_ERR_MBX; | |
647 | u32 p2v_mailbox; | |
648 | ||
649 | DEBUGFUNC("e1000_obtain_mbx_lock_pf"); | |
650 | ||
651 | /* Take ownership of the buffer */ | |
652 | E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU); | |
653 | ||
654 | /* reserve mailbox for vf use */ | |
655 | p2v_mailbox = E1000_READ_REG(hw, E1000_P2VMAILBOX(vf_number)); | |
656 | if (p2v_mailbox & E1000_P2VMAILBOX_PFU) | |
657 | ret_val = E1000_SUCCESS; | |
658 | ||
659 | return ret_val; | |
660 | } | |
661 | ||
662 | /** | |
663 | * e1000_write_mbx_pf - Places a message in the mailbox | |
664 | * @hw: pointer to the HW structure | |
665 | * @msg: The message buffer | |
666 | * @size: Length of buffer | |
667 | * @vf_number: the VF index | |
668 | * | |
669 | * returns SUCCESS if it successfully copied message into the buffer | |
670 | **/ | |
671 | STATIC s32 e1000_write_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size, | |
672 | u16 vf_number) | |
673 | { | |
674 | s32 ret_val; | |
675 | u16 i; | |
676 | ||
677 | DEBUGFUNC("e1000_write_mbx_pf"); | |
678 | ||
679 | /* lock the mailbox to prevent pf/vf race condition */ | |
680 | ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number); | |
681 | if (ret_val) | |
682 | goto out_no_write; | |
683 | ||
684 | /* flush msg and acks as we are overwriting the message buffer */ | |
685 | e1000_check_for_msg_pf(hw, vf_number); | |
686 | e1000_check_for_ack_pf(hw, vf_number); | |
687 | ||
688 | /* copy the caller specified message to the mailbox memory buffer */ | |
689 | for (i = 0; i < size; i++) | |
690 | E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i, msg[i]); | |
691 | ||
692 | /* Interrupt VF to tell it a message has been sent and release buffer*/ | |
693 | E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_STS); | |
694 | ||
695 | /* update stats */ | |
696 | hw->mbx.stats.msgs_tx++; | |
697 | ||
698 | out_no_write: | |
699 | return ret_val; | |
700 | ||
701 | } | |
702 | ||
703 | /** | |
704 | * e1000_read_mbx_pf - Read a message from the mailbox | |
705 | * @hw: pointer to the HW structure | |
706 | * @msg: The message buffer | |
707 | * @size: Length of buffer | |
708 | * @vf_number: the VF index | |
709 | * | |
710 | * This function copies a message from the mailbox buffer to the caller's | |
711 | * memory buffer. The presumption is that the caller knows that there was | |
712 | * a message due to a VF request so no polling for message is needed. | |
713 | **/ | |
714 | STATIC s32 e1000_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size, | |
715 | u16 vf_number) | |
716 | { | |
717 | s32 ret_val; | |
718 | u16 i; | |
719 | ||
720 | DEBUGFUNC("e1000_read_mbx_pf"); | |
721 | ||
722 | /* lock the mailbox to prevent pf/vf race condition */ | |
723 | ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number); | |
724 | if (ret_val) | |
725 | goto out_no_read; | |
726 | ||
727 | /* copy the message to the mailbox memory buffer */ | |
728 | for (i = 0; i < size; i++) | |
729 | msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i); | |
730 | ||
731 | /* Acknowledge the message and release buffer */ | |
732 | E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK); | |
733 | ||
734 | /* update stats */ | |
735 | hw->mbx.stats.msgs_rx++; | |
736 | ||
737 | out_no_read: | |
738 | return ret_val; | |
739 | } | |
740 | ||
741 | /** | |
742 | * e1000_init_mbx_params_pf - set initial values for pf mailbox | |
743 | * @hw: pointer to the HW structure | |
744 | * | |
745 | * Initializes the hw->mbx struct to correct values for pf mailbox | |
746 | */ | |
747 | s32 e1000_init_mbx_params_pf(struct e1000_hw *hw) | |
748 | { | |
749 | struct e1000_mbx_info *mbx = &hw->mbx; | |
750 | ||
751 | switch (hw->mac.type) { | |
752 | case e1000_82576: | |
753 | case e1000_i350: | |
754 | case e1000_i354: | |
755 | mbx->timeout = 0; | |
756 | mbx->usec_delay = 0; | |
757 | ||
758 | mbx->size = E1000_VFMAILBOX_SIZE; | |
759 | ||
760 | mbx->ops.read = e1000_read_mbx_pf; | |
761 | mbx->ops.write = e1000_write_mbx_pf; | |
762 | mbx->ops.read_posted = e1000_read_posted_mbx; | |
763 | mbx->ops.write_posted = e1000_write_posted_mbx; | |
764 | mbx->ops.check_for_msg = e1000_check_for_msg_pf; | |
765 | mbx->ops.check_for_ack = e1000_check_for_ack_pf; | |
766 | mbx->ops.check_for_rst = e1000_check_for_rst_pf; | |
767 | ||
768 | mbx->stats.msgs_tx = 0; | |
769 | mbx->stats.msgs_rx = 0; | |
770 | mbx->stats.reqs = 0; | |
771 | mbx->stats.acks = 0; | |
772 | mbx->stats.rsts = 0; | |
773 | default: | |
774 | return E1000_SUCCESS; | |
775 | } | |
776 | } | |
777 |