1 /*******************************************************************************
3 Copyright (c) 2001-2014, Intel Corporation
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7 modification, are permitted provided that the following conditions are met:
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21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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32 ***************************************************************************/
34 #include "ixgbe_type.h"
35 #include "ixgbe_mbx.h"
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
44 * returns SUCCESS if it successfully read message from buffer
46 s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
48 struct ixgbe_mbx_info *mbx = &hw->mbx;
49 s32 ret_val = IXGBE_ERR_MBX;
51 DEBUGFUNC("ixgbe_read_mbx");
53 /* limit read to size of mailbox */
58 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
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
70 * returns SUCCESS if it successfully copied message into the buffer
72 s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
74 struct ixgbe_mbx_info *mbx = &hw->mbx;
75 s32 ret_val = IXGBE_SUCCESS;
77 DEBUGFUNC("ixgbe_write_mbx");
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);
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
94 * returns SUCCESS if the Status bit was found or else ERR_MBX
96 s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
98 struct ixgbe_mbx_info *mbx = &hw->mbx;
99 s32 ret_val = IXGBE_ERR_MBX;
101 DEBUGFUNC("ixgbe_check_for_msg");
103 if (mbx->ops.check_for_msg)
104 ret_val = mbx->ops.check_for_msg(hw, mbx_id);
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
114 * returns SUCCESS if the Status bit was found or else ERR_MBX
116 s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
118 struct ixgbe_mbx_info *mbx = &hw->mbx;
119 s32 ret_val = IXGBE_ERR_MBX;
121 DEBUGFUNC("ixgbe_check_for_ack");
123 if (mbx->ops.check_for_ack)
124 ret_val = mbx->ops.check_for_ack(hw, mbx_id);
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
134 * returns SUCCESS if the Status bit was found or else ERR_MBX
136 s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id)
138 struct ixgbe_mbx_info *mbx = &hw->mbx;
139 s32 ret_val = IXGBE_ERR_MBX;
141 DEBUGFUNC("ixgbe_check_for_rst");
143 if (mbx->ops.check_for_rst)
144 ret_val = mbx->ops.check_for_rst(hw, mbx_id);
150 * ixgbe_poll_for_msg - Wait for message notification
151 * @hw: pointer to the HW structure
152 * @mbx_id: id of mailbox to write
154 * returns SUCCESS if it successfully received a message notification
156 STATIC s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id)
158 struct ixgbe_mbx_info *mbx = &hw->mbx;
159 int countdown = mbx->timeout;
161 DEBUGFUNC("ixgbe_poll_for_msg");
163 if (!countdown || !mbx->ops.check_for_msg)
166 while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
170 usec_delay(mbx->usec_delay);
174 ERROR_REPORT2(IXGBE_ERROR_POLLING,
175 "Polling for VF%d mailbox message timedout", mbx_id);
178 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
182 * ixgbe_poll_for_ack - Wait for message acknowledgement
183 * @hw: pointer to the HW structure
184 * @mbx_id: id of mailbox to write
186 * returns SUCCESS if it successfully received a message acknowledgement
188 STATIC s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id)
190 struct ixgbe_mbx_info *mbx = &hw->mbx;
191 int countdown = mbx->timeout;
193 DEBUGFUNC("ixgbe_poll_for_ack");
195 if (!countdown || !mbx->ops.check_for_ack)
198 while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
202 usec_delay(mbx->usec_delay);
206 ERROR_REPORT2(IXGBE_ERROR_POLLING,
207 "Polling for VF%d mailbox ack timedout", mbx_id);
210 return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX;
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
220 * returns SUCCESS if it successfully received a message notification and
221 * copied it into the receive buffer.
223 s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
225 struct ixgbe_mbx_info *mbx = &hw->mbx;
226 s32 ret_val = IXGBE_ERR_MBX;
228 DEBUGFUNC("ixgbe_read_posted_mbx");
233 ret_val = ixgbe_poll_for_msg(hw, mbx_id);
235 /* if ack received read message, otherwise we timed out */
237 ret_val = mbx->ops.read(hw, msg, size, mbx_id);
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
249 * returns SUCCESS if it successfully copied message into the buffer and
250 * received an ack to that message within delay * timeout period
252 s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size,
255 struct ixgbe_mbx_info *mbx = &hw->mbx;
256 s32 ret_val = IXGBE_ERR_MBX;
258 DEBUGFUNC("ixgbe_write_posted_mbx");
260 /* exit if either we can't write or there isn't a defined timeout */
261 if (!mbx->ops.write || !mbx->timeout)
265 ret_val = mbx->ops.write(hw, msg, size, mbx_id);
267 /* if msg sent wait until we receive an ack */
269 ret_val = ixgbe_poll_for_ack(hw, mbx_id);
275 * ixgbe_init_mbx_ops_generic - Initialize MB function pointers
276 * @hw: pointer to the HW structure
278 * Setups up the mailbox read and write message function pointers
280 void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw)
282 struct ixgbe_mbx_info *mbx = &hw->mbx;
284 mbx->ops.read_posted = ixgbe_read_posted_mbx;
285 mbx->ops.write_posted = ixgbe_write_posted_mbx;
289 * ixgbe_read_v2p_mailbox - read v2p mailbox
290 * @hw: pointer to the HW structure
292 * This function is used to read the v2p mailbox without losing the read to
295 STATIC u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw)
297 u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX);
299 v2p_mailbox |= hw->mbx.v2p_mailbox;
300 hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS;
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
310 * This function is used to check for the read to clear bits within
313 STATIC s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask)
315 u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw);
316 s32 ret_val = IXGBE_ERR_MBX;
318 if (v2p_mailbox & mask)
319 ret_val = IXGBE_SUCCESS;
321 hw->mbx.v2p_mailbox &= ~mask;
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
331 * returns SUCCESS if the PF has set the Status bit or else ERR_MBX
333 STATIC s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id)
335 s32 ret_val = IXGBE_ERR_MBX;
337 UNREFERENCED_1PARAMETER(mbx_id);
338 DEBUGFUNC("ixgbe_check_for_msg_vf");
340 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) {
341 ret_val = IXGBE_SUCCESS;
342 hw->mbx.stats.reqs++;
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
353 * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX
355 STATIC s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id)
357 s32 ret_val = IXGBE_ERR_MBX;
359 UNREFERENCED_1PARAMETER(mbx_id);
360 DEBUGFUNC("ixgbe_check_for_ack_vf");
362 if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) {
363 ret_val = IXGBE_SUCCESS;
364 hw->mbx.stats.acks++;
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
375 * returns true if the PF has set the reset done bit or else false
377 STATIC s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id)
379 s32 ret_val = IXGBE_ERR_MBX;
381 UNREFERENCED_1PARAMETER(mbx_id);
382 DEBUGFUNC("ixgbe_check_for_rst_vf");
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++;
394 * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock
395 * @hw: pointer to the HW structure
397 * return SUCCESS if we obtained the mailbox lock
399 STATIC s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw)
401 s32 ret_val = IXGBE_ERR_MBX;
403 DEBUGFUNC("ixgbe_obtain_mbx_lock_vf");
405 /* Take ownership of the buffer */
406 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU);
408 /* reserve mailbox for vf use */
409 if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU)
410 ret_val = IXGBE_SUCCESS;
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
422 * returns SUCCESS if it successfully copied message into the buffer
424 STATIC s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
430 UNREFERENCED_1PARAMETER(mbx_id);
432 DEBUGFUNC("ixgbe_write_mbx_vf");
434 /* lock the mailbox to prevent pf/vf race condition */
435 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
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);
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]);
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.
453 while (i < hw->mbx.size) {
454 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, 0);
459 hw->mbx.stats.msgs_tx++;
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);
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
475 * returns SUCCESS if it successfully read message from buffer
477 STATIC s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size,
480 s32 ret_val = IXGBE_SUCCESS;
483 DEBUGFUNC("ixgbe_read_mbx_vf");
484 UNREFERENCED_1PARAMETER(mbx_id);
486 /* lock the mailbox to prevent pf/vf race condition */
487 ret_val = ixgbe_obtain_mbx_lock_vf(hw);
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);
495 /* Acknowledge receipt and release mailbox, then we're done */
496 IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK);
499 hw->mbx.stats.msgs_rx++;
506 * ixgbe_init_mbx_params_vf - set initial values for vf mailbox
507 * @hw: pointer to the HW structure
509 * Initializes the hw->mbx struct to correct values for vf mailbox
511 void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw)
513 struct ixgbe_mbx_info *mbx = &hw->mbx;
515 /* start mailbox as timed out and let the reset_hw call set the timeout
516 * value to begin communications */
518 mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
520 mbx->size = IXGBE_VFMAILBOX_SIZE;
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;
530 mbx->stats.msgs_tx = 0;
531 mbx->stats.msgs_rx = 0;
537 STATIC s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index)
539 u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index));
540 s32 ret_val = IXGBE_ERR_MBX;
542 if (mbvficr & mask) {
543 ret_val = IXGBE_SUCCESS;
544 IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask);
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
555 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
557 STATIC s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number)
559 s32 ret_val = IXGBE_ERR_MBX;
560 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
561 u32 vf_bit = vf_number % 16;
563 DEBUGFUNC("ixgbe_check_for_msg_pf");
565 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit,
567 ret_val = IXGBE_SUCCESS;
568 hw->mbx.stats.reqs++;
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
579 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
581 STATIC s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number)
583 s32 ret_val = IXGBE_ERR_MBX;
584 s32 index = IXGBE_MBVFICR_INDEX(vf_number);
585 u32 vf_bit = vf_number % 16;
587 DEBUGFUNC("ixgbe_check_for_ack_pf");
589 if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit,
591 ret_val = IXGBE_SUCCESS;
592 hw->mbx.stats.acks++;
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
603 * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
605 STATIC s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number)
607 u32 reg_offset = (vf_number < 32) ? 0 : 1;
608 u32 vf_shift = vf_number % 32;
610 s32 ret_val = IXGBE_ERR_MBX;
612 DEBUGFUNC("ixgbe_check_for_rst_pf");
614 switch (hw->mac.type) {
615 case ixgbe_mac_82599EB:
616 vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset));
619 vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset));
625 if (vflre & (1 << vf_shift)) {
626 ret_val = IXGBE_SUCCESS;
627 IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift));
628 hw->mbx.stats.rsts++;
635 * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock
636 * @hw: pointer to the HW structure
637 * @vf_number: the VF index
639 * return SUCCESS if we obtained the mailbox lock
641 STATIC s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number)
643 s32 ret_val = IXGBE_ERR_MBX;
646 DEBUGFUNC("ixgbe_obtain_mbx_lock_pf");
648 /* Take ownership of the buffer */
649 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU);
651 /* reserve mailbox for vf use */
652 p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number));
653 if (p2v_mailbox & IXGBE_PFMAILBOX_PFU)
654 ret_val = IXGBE_SUCCESS;
656 ERROR_REPORT2(IXGBE_ERROR_POLLING,
657 "Failed to obtain mailbox lock for VF%d", vf_number);
664 * ixgbe_write_mbx_pf - Places a message in the mailbox
665 * @hw: pointer to the HW structure
666 * @msg: The message buffer
667 * @size: Length of buffer
668 * @vf_number: the VF index
670 * returns SUCCESS if it successfully copied message into the buffer
672 STATIC s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
678 DEBUGFUNC("ixgbe_write_mbx_pf");
680 /* lock the mailbox to prevent pf/vf race condition */
681 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
685 /* flush msg and acks as we are overwriting the message buffer */
686 ixgbe_check_for_msg_pf(hw, vf_number);
687 ixgbe_check_for_ack_pf(hw, vf_number);
689 /* copy the caller specified message to the mailbox memory buffer */
690 for (i = 0; i < size; i++)
691 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]);
694 * Complete the remaining mailbox data registers with zero to reset
695 * the data sent in a previous exchange (in either side) with the VF,
696 * including exchanges performed by another Guest OS to which that VF
697 * was previously assigned.
699 while (i < hw->mbx.size) {
700 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, 0);
704 /* Interrupt VF to tell it a message has been sent and release buffer*/
705 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS);
708 hw->mbx.stats.msgs_tx++;
716 * ixgbe_read_mbx_pf - Read a message from the mailbox
717 * @hw: pointer to the HW structure
718 * @msg: The message buffer
719 * @size: Length of buffer
720 * @vf_number: the VF index
722 * This function copies a message from the mailbox buffer to the caller's
723 * memory buffer. The presumption is that the caller knows that there was
724 * a message due to a VF request so no polling for message is needed.
726 STATIC s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
732 DEBUGFUNC("ixgbe_read_mbx_pf");
734 /* lock the mailbox to prevent pf/vf race condition */
735 ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number);
739 /* copy the message to the mailbox memory buffer */
740 for (i = 0; i < size; i++)
741 msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i);
743 /* Acknowledge the message and release buffer */
744 IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK);
747 hw->mbx.stats.msgs_rx++;
754 * ixgbe_init_mbx_params_pf - set initial values for pf mailbox
755 * @hw: pointer to the HW structure
757 * Initializes the hw->mbx struct to correct values for pf mailbox
759 void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw)
761 struct ixgbe_mbx_info *mbx = &hw->mbx;
763 if (hw->mac.type != ixgbe_mac_82599EB &&
764 hw->mac.type != ixgbe_mac_X540)
770 mbx->size = IXGBE_VFMAILBOX_SIZE;
772 mbx->ops.read = ixgbe_read_mbx_pf;
773 mbx->ops.write = ixgbe_write_mbx_pf;
774 mbx->ops.read_posted = ixgbe_read_posted_mbx;
775 mbx->ops.write_posted = ixgbe_write_posted_mbx;
776 mbx->ops.check_for_msg = ixgbe_check_for_msg_pf;
777 mbx->ops.check_for_ack = ixgbe_check_for_ack_pf;
778 mbx->ops.check_for_rst = ixgbe_check_for_rst_pf;
780 mbx->stats.msgs_tx = 0;
781 mbx->stats.msgs_rx = 0;