diff options
Diffstat (limited to 'drivers/net/ixgbe/base/ixgbe_mbx.c')
| -rw-r--r-- | drivers/net/ixgbe/base/ixgbe_mbx.c | 791 |
1 files changed, 791 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/base/ixgbe_mbx.c b/drivers/net/ixgbe/base/ixgbe_mbx.c new file mode 100644 index 00000000..042e5cc1 --- /dev/null +++ b/drivers/net/ixgbe/base/ixgbe_mbx.c @@ -0,0 +1,791 @@ +/******************************************************************************* + +Copyright (c) 2001-2015, Intel Corporation +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + 3. Neither the name of the Intel Corporation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. + +***************************************************************************/ + +#include "ixgbe_type.h" +#include "ixgbe_mbx.h" + +/** + * ixgbe_read_mbx - Reads a message from the mailbox + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to read + * + * returns SUCCESS if it successfully read message from buffer + **/ +s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_read_mbx"); + + /* limit read to size of mailbox */ + if (size > mbx->size) + size = mbx->size; + + if (mbx->ops.read) + ret_val = mbx->ops.read(hw, msg, size, mbx_id); + + return ret_val; +} + +/** + * ixgbe_write_mbx - Write a message to the mailbox + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully copied message into the buffer + **/ +s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_SUCCESS; + + DEBUGFUNC("ixgbe_write_mbx"); + + if (size > mbx->size) { + ret_val = IXGBE_ERR_MBX; + ERROR_REPORT2(IXGBE_ERROR_ARGUMENT, + "Invalid mailbox message size %d", size); + } else if (mbx->ops.write) + ret_val = mbx->ops.write(hw, msg, size, mbx_id); + + return ret_val; +} + +/** + * ixgbe_check_for_msg - checks to see if someone sent us mail + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns SUCCESS if the Status bit was found or else ERR_MBX + **/ +s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_check_for_msg"); + + if (mbx->ops.check_for_msg) + ret_val = mbx->ops.check_for_msg(hw, mbx_id); + + return ret_val; +} + +/** + * ixgbe_check_for_ack - checks to see if someone sent us ACK + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns SUCCESS if the Status bit was found or else ERR_MBX + **/ +s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_check_for_ack"); + + if (mbx->ops.check_for_ack) + ret_val = mbx->ops.check_for_ack(hw, mbx_id); + + return ret_val; +} + +/** + * ixgbe_check_for_rst - checks to see if other side has reset + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns SUCCESS if the Status bit was found or else ERR_MBX + **/ +s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_check_for_rst"); + + if (mbx->ops.check_for_rst) + ret_val = mbx->ops.check_for_rst(hw, mbx_id); + + return ret_val; +} + +/** + * ixgbe_poll_for_msg - Wait for message notification + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully received a message notification + **/ +STATIC s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + int countdown = mbx->timeout; + + DEBUGFUNC("ixgbe_poll_for_msg"); + + if (!countdown || !mbx->ops.check_for_msg) + goto out; + + while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) { + countdown--; + if (!countdown) + break; + usec_delay(mbx->usec_delay); + } + + if (countdown == 0) + ERROR_REPORT2(IXGBE_ERROR_POLLING, + "Polling for VF%d mailbox message timedout", mbx_id); + +out: + return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; +} + +/** + * ixgbe_poll_for_ack - Wait for message acknowledgement + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully received a message acknowledgement + **/ +STATIC s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + int countdown = mbx->timeout; + + DEBUGFUNC("ixgbe_poll_for_ack"); + + if (!countdown || !mbx->ops.check_for_ack) + goto out; + + while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) { + countdown--; + if (!countdown) + break; + usec_delay(mbx->usec_delay); + } + + if (countdown == 0) + ERROR_REPORT2(IXGBE_ERROR_POLLING, + "Polling for VF%d mailbox ack timedout", mbx_id); + +out: + return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; +} + +/** + * ixgbe_read_posted_mbx - Wait for message notification and receive message + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully received a message notification and + * copied it into the receive buffer. + **/ +s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_read_posted_mbx"); + + if (!mbx->ops.read) + goto out; + + ret_val = ixgbe_poll_for_msg(hw, mbx_id); + + /* if ack received read message, otherwise we timed out */ + if (!ret_val) + ret_val = mbx->ops.read(hw, msg, size, mbx_id); +out: + return ret_val; +} + +/** + * ixgbe_write_posted_mbx - Write a message to the mailbox, wait for ack + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully copied message into the buffer and + * received an ack to that message within delay * timeout period + **/ +s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, + u16 mbx_id) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_write_posted_mbx"); + + /* exit if either we can't write or there isn't a defined timeout */ + if (!mbx->ops.write || !mbx->timeout) + goto out; + + /* send msg */ + ret_val = mbx->ops.write(hw, msg, size, mbx_id); + + /* if msg sent wait until we receive an ack */ + if (!ret_val) + ret_val = ixgbe_poll_for_ack(hw, mbx_id); +out: + return ret_val; +} + +/** + * ixgbe_init_mbx_ops_generic - Initialize MB function pointers + * @hw: pointer to the HW structure + * + * Setups up the mailbox read and write message function pointers + **/ +void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + + mbx->ops.read_posted = ixgbe_read_posted_mbx; + mbx->ops.write_posted = ixgbe_write_posted_mbx; +} + +/** + * ixgbe_read_v2p_mailbox - read v2p mailbox + * @hw: pointer to the HW structure + * + * This function is used to read the v2p mailbox without losing the read to + * clear status bits. + **/ +STATIC u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw) +{ + u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX); + + v2p_mailbox |= hw->mbx.v2p_mailbox; + hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS; + + return v2p_mailbox; +} + +/** + * ixgbe_check_for_bit_vf - Determine if a status bit was set + * @hw: pointer to the HW structure + * @mask: bitmask for bits to be tested and cleared + * + * This function is used to check for the read to clear bits within + * the V2P mailbox. + **/ +STATIC s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask) +{ + u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw); + s32 ret_val = IXGBE_ERR_MBX; + + if (v2p_mailbox & mask) + ret_val = IXGBE_SUCCESS; + + hw->mbx.v2p_mailbox &= ~mask; + + return ret_val; +} + +/** + * ixgbe_check_for_msg_vf - checks to see if the PF has sent mail + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns SUCCESS if the PF has set the Status bit or else ERR_MBX + **/ +STATIC s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id) +{ + s32 ret_val = IXGBE_ERR_MBX; + + UNREFERENCED_1PARAMETER(mbx_id); + DEBUGFUNC("ixgbe_check_for_msg_vf"); + + if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) { + ret_val = IXGBE_SUCCESS; + hw->mbx.stats.reqs++; + } + + return ret_val; +} + +/** + * ixgbe_check_for_ack_vf - checks to see if the PF has ACK'd + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX + **/ +STATIC s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id) +{ + s32 ret_val = IXGBE_ERR_MBX; + + UNREFERENCED_1PARAMETER(mbx_id); + DEBUGFUNC("ixgbe_check_for_ack_vf"); + + if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) { + ret_val = IXGBE_SUCCESS; + hw->mbx.stats.acks++; + } + + return ret_val; +} + +/** + * ixgbe_check_for_rst_vf - checks to see if the PF has reset + * @hw: pointer to the HW structure + * @mbx_id: id of mailbox to check + * + * returns true if the PF has set the reset done bit or else false + **/ +STATIC s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id) +{ + s32 ret_val = IXGBE_ERR_MBX; + + UNREFERENCED_1PARAMETER(mbx_id); + DEBUGFUNC("ixgbe_check_for_rst_vf"); + + if (!ixgbe_check_for_bit_vf(hw, (IXGBE_VFMAILBOX_RSTD | + IXGBE_VFMAILBOX_RSTI))) { + ret_val = IXGBE_SUCCESS; + hw->mbx.stats.rsts++; + } + + return ret_val; +} + +/** + * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock + * @hw: pointer to the HW structure + * + * return SUCCESS if we obtained the mailbox lock + **/ +STATIC s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw) +{ + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_obtain_mbx_lock_vf"); + + /* Take ownership of the buffer */ + IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU); + + /* reserve mailbox for vf use */ + if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU) + ret_val = IXGBE_SUCCESS; + + return ret_val; +} + +/** + * ixgbe_write_mbx_vf - Write a message to the mailbox + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to write + * + * returns SUCCESS if it successfully copied message into the buffer + **/ +STATIC s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, + u16 mbx_id) +{ + s32 ret_val; + u16 i; + + UNREFERENCED_1PARAMETER(mbx_id); + + DEBUGFUNC("ixgbe_write_mbx_vf"); + + /* lock the mailbox to prevent pf/vf race condition */ + ret_val = ixgbe_obtain_mbx_lock_vf(hw); + if (ret_val) + goto out_no_write; + + /* flush msg and acks as we are overwriting the message buffer */ + ixgbe_check_for_msg_vf(hw, 0); + ixgbe_check_for_ack_vf(hw, 0); + + /* copy the caller specified message to the mailbox memory buffer */ + for (i = 0; i < size; i++) + IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, msg[i]); + + /* + * Complete the remaining mailbox data registers with zero to reset + * the data sent in a previous exchange (in either side) with the PF, + * including exchanges performed by another Guest OS to which that VF + * was previously assigned. + */ + while (i < hw->mbx.size) { + IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, 0); + i++; + } + + /* update stats */ + hw->mbx.stats.msgs_tx++; + + /* Drop VFU and interrupt the PF to tell it a message has been sent */ + IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ); + +out_no_write: + return ret_val; +} + +/** + * ixgbe_read_mbx_vf - Reads a message from the inbox intended for vf + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @mbx_id: id of mailbox to read + * + * returns SUCCESS if it successfully read message from buffer + **/ +STATIC s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, + u16 mbx_id) +{ + s32 ret_val = IXGBE_SUCCESS; + u16 i; + + DEBUGFUNC("ixgbe_read_mbx_vf"); + UNREFERENCED_1PARAMETER(mbx_id); + + /* lock the mailbox to prevent pf/vf race condition */ + ret_val = ixgbe_obtain_mbx_lock_vf(hw); + if (ret_val) + goto out_no_read; + + /* copy the message from the mailbox memory buffer */ + for (i = 0; i < size; i++) + msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_VFMBMEM, i); + + /* Acknowledge receipt and release mailbox, then we're done */ + IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK); + + /* update stats */ + hw->mbx.stats.msgs_rx++; + +out_no_read: + return ret_val; +} + +/** + * ixgbe_init_mbx_params_vf - set initial values for vf mailbox + * @hw: pointer to the HW structure + * + * Initializes the hw->mbx struct to correct values for vf mailbox + */ +void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + + /* start mailbox as timed out and let the reset_hw call set the timeout + * value to begin communications */ + mbx->timeout = 0; + mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY; + + mbx->size = IXGBE_VFMAILBOX_SIZE; + + mbx->ops.read = ixgbe_read_mbx_vf; + mbx->ops.write = ixgbe_write_mbx_vf; + mbx->ops.read_posted = ixgbe_read_posted_mbx; + mbx->ops.write_posted = ixgbe_write_posted_mbx; + mbx->ops.check_for_msg = ixgbe_check_for_msg_vf; + mbx->ops.check_for_ack = ixgbe_check_for_ack_vf; + mbx->ops.check_for_rst = ixgbe_check_for_rst_vf; + + mbx->stats.msgs_tx = 0; + mbx->stats.msgs_rx = 0; + mbx->stats.reqs = 0; + mbx->stats.acks = 0; + mbx->stats.rsts = 0; +} + +STATIC s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index) +{ + u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index)); + s32 ret_val = IXGBE_ERR_MBX; + + if (mbvficr & mask) { + ret_val = IXGBE_SUCCESS; + IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask); + } + + return ret_val; +} + +/** + * ixgbe_check_for_msg_pf - checks to see if the VF has sent mail + * @hw: pointer to the HW structure + * @vf_number: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +STATIC s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number) +{ + s32 ret_val = IXGBE_ERR_MBX; + s32 index = IXGBE_MBVFICR_INDEX(vf_number); + u32 vf_bit = vf_number % 16; + + DEBUGFUNC("ixgbe_check_for_msg_pf"); + + if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit, + index)) { + ret_val = IXGBE_SUCCESS; + hw->mbx.stats.reqs++; + } + + return ret_val; +} + +/** + * ixgbe_check_for_ack_pf - checks to see if the VF has ACKed + * @hw: pointer to the HW structure + * @vf_number: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +STATIC s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number) +{ + s32 ret_val = IXGBE_ERR_MBX; + s32 index = IXGBE_MBVFICR_INDEX(vf_number); + u32 vf_bit = vf_number % 16; + + DEBUGFUNC("ixgbe_check_for_ack_pf"); + + if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit, + index)) { + ret_val = IXGBE_SUCCESS; + hw->mbx.stats.acks++; + } + + return ret_val; +} + +/** + * ixgbe_check_for_rst_pf - checks to see if the VF has reset + * @hw: pointer to the HW structure + * @vf_number: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +STATIC s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number) +{ + u32 reg_offset = (vf_number < 32) ? 0 : 1; + u32 vf_shift = vf_number % 32; + u32 vflre = 0; + s32 ret_val = IXGBE_ERR_MBX; + + DEBUGFUNC("ixgbe_check_for_rst_pf"); + + switch (hw->mac.type) { + case ixgbe_mac_82599EB: + vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset)); + break; + case ixgbe_mac_X550: + case ixgbe_mac_X550EM_x: + case ixgbe_mac_X550EM_a: + case ixgbe_mac_X540: + vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset)); + break; + default: + break; + } + + if (vflre & (1 << vf_shift)) { + ret_val = IXGBE_SUCCESS; + IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift)); + hw->mbx.stats.rsts++; + } + + return ret_val; +} + +/** + * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock + * @hw: pointer to the HW structure + * @vf_number: the VF index + * + * return SUCCESS if we obtained the mailbox lock + **/ +STATIC s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number) +{ + s32 ret_val = IXGBE_ERR_MBX; + u32 p2v_mailbox; + + DEBUGFUNC("ixgbe_obtain_mbx_lock_pf"); + + /* Take ownership of the buffer */ + IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU); + + /* reserve mailbox for vf use */ + p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number)); + if (p2v_mailbox & IXGBE_PFMAILBOX_PFU) + ret_val = IXGBE_SUCCESS; + else + ERROR_REPORT2(IXGBE_ERROR_POLLING, + "Failed to obtain mailbox lock for VF%d", vf_number); + + + return ret_val; +} + +/** + * ixgbe_write_mbx_pf - Places a message in the mailbox + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @vf_number: the VF index + * + * returns SUCCESS if it successfully copied message into the buffer + **/ +STATIC s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, + u16 vf_number) +{ + s32 ret_val; + u16 i; + + DEBUGFUNC("ixgbe_write_mbx_pf"); + + /* lock the mailbox to prevent pf/vf race condition */ + ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); + if (ret_val) + goto out_no_write; + + /* flush msg and acks as we are overwriting the message buffer */ + ixgbe_check_for_msg_pf(hw, vf_number); + ixgbe_check_for_ack_pf(hw, vf_number); + + /* copy the caller specified message to the mailbox memory buffer */ + for (i = 0; i < size; i++) + IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]); + + /* + * Complete the remaining mailbox data registers with zero to reset + * the data sent in a previous exchange (in either side) with the VF, + * including exchanges performed by another Guest OS to which that VF + * was previously assigned. + */ + while (i < hw->mbx.size) { + IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, 0); + i++; + } + + /* Interrupt VF to tell it a message has been sent and release buffer*/ + IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS); + + /* update stats */ + hw->mbx.stats.msgs_tx++; + +out_no_write: + return ret_val; + +} + +/** + * ixgbe_read_mbx_pf - Read a message from the mailbox + * @hw: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @vf_number: the VF index + * + * This function copies a message from the mailbox buffer to the caller's + * memory buffer. The presumption is that the caller knows that there was + * a message due to a VF request so no polling for message is needed. + **/ +STATIC s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, + u16 vf_number) +{ + s32 ret_val; + u16 i; + + DEBUGFUNC("ixgbe_read_mbx_pf"); + + /* lock the mailbox to prevent pf/vf race condition */ + ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); + if (ret_val) + goto out_no_read; + + /* copy the message to the mailbox memory buffer */ + for (i = 0; i < size; i++) + msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i); + + /* Acknowledge the message and release buffer */ + IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK); + + /* update stats */ + hw->mbx.stats.msgs_rx++; + +out_no_read: + return ret_val; +} + +/** + * ixgbe_init_mbx_params_pf - set initial values for pf mailbox + * @hw: pointer to the HW structure + * + * Initializes the hw->mbx struct to correct values for pf mailbox + */ +void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + + if (hw->mac.type != ixgbe_mac_82599EB && + hw->mac.type != ixgbe_mac_X550 && + hw->mac.type != ixgbe_mac_X550EM_x && + hw->mac.type != ixgbe_mac_X550EM_a && + hw->mac.type != ixgbe_mac_X540) + return; + + mbx->timeout = 0; + mbx->usec_delay = 0; + + mbx->size = IXGBE_VFMAILBOX_SIZE; + + mbx->ops.read = ixgbe_read_mbx_pf; + mbx->ops.write = ixgbe_write_mbx_pf; + mbx->ops.read_posted = ixgbe_read_posted_mbx; + mbx->ops.write_posted = ixgbe_write_posted_mbx; + mbx->ops.check_for_msg = ixgbe_check_for_msg_pf; + mbx->ops.check_for_ack = ixgbe_check_for_ack_pf; + mbx->ops.check_for_rst = ixgbe_check_for_rst_pf; + + mbx->stats.msgs_tx = 0; + mbx->stats.msgs_rx = 0; + mbx->stats.reqs = 0; + mbx->stats.acks = 0; + mbx->stats.rsts = 0; +} |