/* $NetBSD: ixgbe_mbx.c,v 1.11.2.4 2022/02/02 14:25:49 martin Exp $ */
/******************************************************************************
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/*$FreeBSD: head/sys/dev/ixgbe/ixgbe_mbx.c 326022 2017-11-20 19:36:21Z pfg $*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ixgbe_mbx.c,v 1.11.2.4 2022/02/02 14:25:49 martin Exp $");
#include "ixgbe_type.h"
#include "ixgbe_netbsd.h"
#include "ixgbe_mbx.h"
static s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id);
static s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id);
/**
* 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;
DEBUGFUNC("ixgbe_read_mbx");
/* limit read to size of mailbox */
if (size > mbx->size) {
ERROR_REPORT3(IXGBE_ERROR_ARGUMENT,
"Invalid mailbox message size %u, changing to %u",
size, mbx->size);
size = mbx->size;
}
if (mbx->ops[mbx_id].read)
return mbx->ops[mbx_id].read(hw, msg, size, mbx_id);
return IXGBE_ERR_CONFIG;
}
/**
* ixgbe_poll_mbx - Wait for message and read it 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_poll_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
s32 ret_val;
DEBUGFUNC("ixgbe_poll_mbx");
if (!mbx->ops[mbx_id].read || !mbx->ops[mbx_id].check_for_msg ||
!mbx->timeout)
return IXGBE_ERR_CONFIG;
/* limit read to size of mailbox */
if (size > mbx->size) {
ERROR_REPORT3(IXGBE_ERROR_ARGUMENT,
"Invalid mailbox message size %u, changing to %u",
size, mbx->size);
size = mbx->size;
}
ret_val = ixgbe_poll_for_msg(hw, mbx_id);
/* if ack received read message, otherwise we timed out */
if (!ret_val)
return mbx->ops[mbx_id].read(hw, msg, size, mbx_id);
return ret_val;
}
/**
* ixgbe_write_mbx - Write a message to the mailbox and 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 specified period
**/
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_ERR_MBX;
DEBUGFUNC("ixgbe_write_mbx");
/*
* exit if either we can't write, release
* or there is no timeout defined
*/
if (!mbx->ops[mbx_id].write || !mbx->ops[mbx_id].check_for_ack ||
!mbx->ops[mbx_id].release || !mbx->timeout)
return IXGBE_ERR_CONFIG;
if (size > mbx->size) {
ret_val = IXGBE_ERR_PARAM;
ERROR_REPORT2(IXGBE_ERROR_ARGUMENT,
"Invalid mailbox message size %u", size);
} else {
ret_val = mbx->ops[mbx_id].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_CONFIG;
DEBUGFUNC("ixgbe_check_for_msg");
if (mbx->ops[mbx_id].check_for_msg)
ret_val = mbx->ops[mbx_id].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_CONFIG;
DEBUGFUNC("ixgbe_check_for_ack");
if (mbx->ops[mbx_id].check_for_ack)
ret_val = mbx->ops[mbx_id].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_CONFIG;
DEBUGFUNC("ixgbe_check_for_rst");
if (mbx->ops[mbx_id].check_for_rst)
ret_val = mbx->ops[mbx_id].check_for_rst(hw, mbx_id);
return ret_val;
}
/**
* ixgbe_clear_mbx - Clear Mailbox Memory
* @hw: pointer to the HW structure
* @mbx_id: id of mailbox to write
*
* Set VFMBMEM of given VF to 0x0.
**/
s32 ixgbe_clear_mbx(struct ixgbe_hw *hw, u16 mbx_id)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
s32 ret_val = IXGBE_ERR_CONFIG;
DEBUGFUNC("ixgbe_clear_mbx");
if (mbx->ops[mbx_id].clear)
ret_val = mbx->ops[mbx_id].clear(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[mbx_id].check_for_msg)
return IXGBE_ERR_CONFIG;
while (countdown && mbx->ops[mbx_id].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%u mailbox message timedout", mbx_id);
return IXGBE_ERR_TIMEOUT;
}
return IXGBE_SUCCESS;
}
/**
* ixgbe_poll_for_ack - Wait for message acknowledgment
* @hw: pointer to the HW structure
* @mbx_id: id of mailbox to write
*
* returns SUCCESS if it successfully received a message acknowledgment
**/
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[mbx_id].check_for_ack)
return IXGBE_ERR_CONFIG;
while (countdown && mbx->ops[mbx_id].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%u mailbox ack timedout", mbx_id);
return IXGBE_ERR_TIMEOUT;
}
return IXGBE_SUCCESS;
}
/**
* ixgbe_read_mailbox_vf - read VF's mailbox register
* @hw: pointer to the HW structure
*
* This function is used to read the mailbox register dedicated for VF without
* losing the read to clear status bits.
**/
static u32 ixgbe_read_mailbox_vf(struct ixgbe_hw *hw)
{
u32 vf_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX);
vf_mailbox |= hw->mbx.vf_mailbox;
hw->mbx.vf_mailbox |= vf_mailbox & IXGBE_VFMAILBOX_R2C_BITS;
return vf_mailbox;
}
static void ixgbe_clear_msg_vf(struct ixgbe_hw *hw)
{
u32 vf_mailbox = ixgbe_read_mailbox_vf(hw);
if (vf_mailbox & IXGBE_VFMAILBOX_PFSTS) {
IXGBE_EVC_ADD(&hw->mbx.stats.reqs, 1);
hw->mbx.vf_mailbox &= ~IXGBE_VFMAILBOX_PFSTS;
}
}
static void ixgbe_clear_ack_vf(struct ixgbe_hw *hw)
{
u32 vf_mailbox = ixgbe_read_mailbox_vf(hw);
if (vf_mailbox & IXGBE_VFMAILBOX_PFACK) {
IXGBE_EVC_ADD(&hw->mbx.stats.acks, 1);
hw->mbx.vf_mailbox &= ~IXGBE_VFMAILBOX_PFACK;
}
}
static void ixgbe_clear_rst_vf(struct ixgbe_hw *hw)
{
u32 vf_mailbox = ixgbe_read_mailbox_vf(hw);
if (vf_mailbox & (IXGBE_VFMAILBOX_RSTI | IXGBE_VFMAILBOX_RSTD)) {
IXGBE_EVC_ADD(&hw->mbx.stats.rsts, 1);
hw->mbx.vf_mailbox &= ~(IXGBE_VFMAILBOX_RSTI |
IXGBE_VFMAILBOX_RSTD);
}
}
/**
* 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 vf_mailbox = ixgbe_read_mailbox_vf(hw);
if (vf_mailbox & mask)
return IXGBE_SUCCESS;
return IXGBE_ERR_MBX;
}
/**
* 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)
{
UNREFERENCED_1PARAMETER(mbx_id);
DEBUGFUNC("ixgbe_check_for_msg_vf");
if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) {
IXGBE_EVC_ADD(&hw->mbx.stats.reqs, 1);
return IXGBE_SUCCESS;
}
return IXGBE_ERR_MBX;
}
/**
* 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)
{
UNREFERENCED_1PARAMETER(mbx_id);
DEBUGFUNC("ixgbe_check_for_ack_vf");
if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) {
/* TODO: should this be autocleared? */
ixgbe_clear_ack_vf(hw);
IXGBE_EVC_ADD(&hw->mbx.stats.acks, 1);
return IXGBE_SUCCESS;
}
return IXGBE_ERR_MBX;
}
/**
* 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)
{
UNREFERENCED_1PARAMETER(mbx_id);
DEBUGFUNC("ixgbe_check_for_rst_vf");
if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_RSTI |
IXGBE_VFMAILBOX_RSTD)) {
/* TODO: should this be autocleared? */
ixgbe_clear_rst_vf(hw);
IXGBE_EVC_ADD(&hw->mbx.stats.rsts, 1);
return IXGBE_SUCCESS;
}
return IXGBE_ERR_MBX;
}
/**
* 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)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
int countdown = mbx->timeout;
s32 ret_val = IXGBE_ERR_MBX;
u32 vf_mailbox;
DEBUGFUNC("ixgbe_obtain_mbx_lock_vf");
if (!mbx->timeout)
return IXGBE_ERR_CONFIG;
while (countdown--) {
/* Reserve mailbox for VF use */
vf_mailbox = ixgbe_read_mailbox_vf(hw);
vf_mailbox |= IXGBE_VFMAILBOX_VFU;
IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, vf_mailbox);
/* Verify that VF is the owner of the lock */
if (ixgbe_read_mailbox_vf(hw) & IXGBE_VFMAILBOX_VFU) {
ret_val = IXGBE_SUCCESS;
break;
}
/* Wait a bit before trying again */
usec_delay(mbx->usec_delay);
}
if (ret_val != IXGBE_SUCCESS) {
ERROR_REPORT1(IXGBE_ERROR_INVALID_STATE,
"Failed to obtain mailbox lock");
ret_val = IXGBE_ERR_TIMEOUT;
}
return ret_val;
}
/**
* ixgbe_release_mbx_lock_dummy - release mailbox lock
* @hw: pointer to the HW structure
* @mbx_id: id of mailbox to read
**/
static void ixgbe_release_mbx_lock_dummy(struct ixgbe_hw *hw, u16 mbx_id)
{
UNREFERENCED_2PARAMETER(hw, mbx_id);
DEBUGFUNC("ixgbe_release_mbx_lock_dummy");
}
/**
* ixgbe_release_mbx_lock_vf - release mailbox lock
* @hw: pointer to the HW structure
* @mbx_id: id of mailbox to read
**/
static void ixgbe_release_mbx_lock_vf(struct ixgbe_hw *hw, u16 mbx_id)
{
u32 vf_mailbox;
UNREFERENCED_1PARAMETER(mbx_id);
DEBUGFUNC("ixgbe_release_mbx_lock_vf");
/* Return ownership of the buffer */
vf_mailbox = ixgbe_read_mailbox_vf(hw);
vf_mailbox &= ~IXGBE_VFMAILBOX_VFU;
IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, vf_mailbox);
}
/**
* ixgbe_write_mbx_vf_legacy - 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_legacy(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_legacy");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = ixgbe_obtain_mbx_lock_vf(hw);
if (ret_val)
return ret_val;
/* flush msg and acks as we are overwriting the message buffer */
ixgbe_check_for_msg_vf(hw, 0);
ixgbe_clear_msg_vf(hw);
ixgbe_check_for_ack_vf(hw, 0);
ixgbe_clear_ack_vf(hw);
/* 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]);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_tx, 1);
/* interrupt the PF to tell it a message has been sent */
IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ);
return IXGBE_SUCCESS;
}
/**
* 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)
{
u32 vf_mailbox;
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;
/* flush msg and acks as we are overwriting the message buffer */
ixgbe_clear_msg_vf(hw);
ixgbe_clear_ack_vf(hw);
/* 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]);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_tx, 1);
/* interrupt the PF to tell it a message has been sent */
vf_mailbox = ixgbe_read_mailbox_vf(hw);
vf_mailbox |= IXGBE_VFMAILBOX_REQ;
IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, vf_mailbox);
/* if msg sent wait until we receive an ack */
ixgbe_poll_for_ack(hw, mbx_id);
out:
hw->mbx.ops[mbx_id].release(hw, mbx_id);
return ret_val;
}
/**
* ixgbe_read_mbx_vf_legacy - 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_legacy(struct ixgbe_hw *hw, u32 *msg, u16 size,
u16 mbx_id)
{
s32 ret_val;
u16 i;
DEBUGFUNC("ixgbe_read_mbx_vf_legacy");
UNREFERENCED_1PARAMETER(mbx_id);
/* lock the mailbox to prevent pf/vf race condition */
ret_val = ixgbe_obtain_mbx_lock_vf(hw);
if (ret_val)
return ret_val;
/* 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 */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_rx, 1);
return IXGBE_SUCCESS;
}
/**
* 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)
{
u32 vf_mailbox;
s32 ret_val;
u16 i;
DEBUGFUNC("ixgbe_read_mbx_vf");
UNREFERENCED_1PARAMETER(mbx_id);
/* check if there is a message from PF */
ret_val = ixgbe_check_for_msg_vf(hw, 0);
if (ret_val != IXGBE_SUCCESS)
return IXGBE_ERR_MBX_NOMSG;
ixgbe_clear_msg_vf(hw);
/* 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 */
vf_mailbox = ixgbe_read_mailbox_vf(hw);
vf_mailbox |= IXGBE_VFMAILBOX_ACK;
IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, vf_mailbox);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_rx, 1);
return IXGBE_SUCCESS;
}
/**
* ixgbe_init_mbx_params_vf - set initial values for vf mailbox
* @hw: pointer to the HW structure
*
* Initializes single set the hw->mbx struct to correct values for vf mailbox
* Set of legacy functions is being used here
*/
void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
mbx->size = IXGBE_VFMAILBOX_SIZE;
/* VF has only one mailbox connection, no need for more IDs */
mbx->ops[0].release = ixgbe_release_mbx_lock_dummy;
mbx->ops[0].read = ixgbe_read_mbx_vf_legacy;
mbx->ops[0].write = ixgbe_write_mbx_vf_legacy;
mbx->ops[0].check_for_msg = ixgbe_check_for_msg_vf;
mbx->ops[0].check_for_ack = ixgbe_check_for_ack_vf;
mbx->ops[0].check_for_rst = ixgbe_check_for_rst_vf;
mbx->ops[0].clear = NULL;
IXGBE_EVC_STORE(&mbx->stats.msgs_tx, 0);
IXGBE_EVC_STORE(&mbx->stats.msgs_rx, 0);
IXGBE_EVC_STORE(&mbx->stats.reqs, 0);
IXGBE_EVC_STORE(&mbx->stats.acks, 0);
IXGBE_EVC_STORE(&mbx->stats.rsts, 0);
}
/**
* ixgbe_upgrade_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_upgrade_mbx_params_vf(struct ixgbe_hw *hw)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
mbx->size = IXGBE_VFMAILBOX_SIZE;
/* VF has only one mailbox connection, no need for more IDs */
mbx->ops[0].release = ixgbe_release_mbx_lock_vf;
mbx->ops[0].read = ixgbe_read_mbx_vf;
mbx->ops[0].write = ixgbe_write_mbx_vf;
mbx->ops[0].check_for_msg = ixgbe_check_for_msg_vf;
mbx->ops[0].check_for_ack = ixgbe_check_for_ack_vf;
mbx->ops[0].check_for_rst = ixgbe_check_for_rst_vf;
mbx->ops[0].clear = NULL;
}
static void ixgbe_clear_msg_pf(struct ixgbe_hw *hw, u16 vf_id)
{
u32 vf_shift = IXGBE_PFMBICR_SHIFT(vf_id);
s32 index = IXGBE_PFMBICR_INDEX(vf_id);
u32 pfmbicr;
pfmbicr = IXGBE_READ_REG(hw, IXGBE_PFMBICR(index));
if (pfmbicr & (IXGBE_PFMBICR_VFREQ_VF1 << vf_shift))
IXGBE_EVC_ADD(&hw->mbx.stats.reqs, 1);
IXGBE_WRITE_REG(hw, IXGBE_PFMBICR(index),
IXGBE_PFMBICR_VFREQ_VF1 << vf_shift);
}
static void ixgbe_clear_ack_pf(struct ixgbe_hw *hw, u16 vf_id)
{
u32 vf_shift = IXGBE_PFMBICR_SHIFT(vf_id);
s32 index = IXGBE_PFMBICR_INDEX(vf_id);
u32 pfmbicr;
pfmbicr = IXGBE_READ_REG(hw, IXGBE_PFMBICR(index));
if (pfmbicr & (IXGBE_PFMBICR_VFACK_VF1 << vf_shift))
IXGBE_EVC_ADD(&hw->mbx.stats.acks, 1);
IXGBE_WRITE_REG(hw, IXGBE_PFMBICR(index),
IXGBE_PFMBICR_VFACK_VF1 << vf_shift);
}
static s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index)
{
u32 pfmbicr = IXGBE_READ_REG(hw, IXGBE_PFMBICR(index));
if (pfmbicr & mask)
return IXGBE_SUCCESS;
return IXGBE_ERR_MBX;
}
/**
* ixgbe_check_for_msg_pf - checks to see if the VF has sent mail
* @hw: pointer to the HW structure
* @vf_id: 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_id)
{
u32 vf_shift = IXGBE_PFMBICR_SHIFT(vf_id);
s32 index = IXGBE_PFMBICR_INDEX(vf_id);
DEBUGFUNC("ixgbe_check_for_msg_pf");
if (!ixgbe_check_for_bit_pf(hw, IXGBE_PFMBICR_VFREQ_VF1 << vf_shift,
index))
return IXGBE_SUCCESS;
return IXGBE_ERR_MBX;
}
/**
* ixgbe_check_for_ack_pf - checks to see if the VF has ACKed
* @hw: pointer to the HW structure
* @vf_id: 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_id)
{
u32 vf_shift = IXGBE_PFMBICR_SHIFT(vf_id);
s32 index = IXGBE_PFMBICR_INDEX(vf_id);
s32 ret_val = IXGBE_ERR_MBX;
DEBUGFUNC("ixgbe_check_for_ack_pf");
if (!ixgbe_check_for_bit_pf(hw, IXGBE_PFMBICR_VFACK_VF1 << vf_shift,
index)) {
ret_val = IXGBE_SUCCESS;
/* TODO: should this be autocleared? */
ixgbe_clear_ack_pf(hw, vf_id);
}
return ret_val;
}
/**
* ixgbe_check_for_rst_pf - checks to see if the VF has reset
* @hw: pointer to the HW structure
* @vf_id: 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_id)
{
u32 vf_shift = IXGBE_PFVFLRE_SHIFT(vf_id);
u32 index = IXGBE_PFVFLRE_INDEX(vf_id);
s32 ret_val = IXGBE_ERR_MBX;
u32 vflre = 0;
DEBUGFUNC("ixgbe_check_for_rst_pf");
switch (hw->mac.type) {
case ixgbe_mac_82599EB:
vflre = IXGBE_READ_REG(hw, IXGBE_PFVFLRE(index));
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_PFVFLREC(index));
break;
default:
break;
}
if (vflre & (1 << vf_shift)) {
ret_val = IXGBE_SUCCESS;
IXGBE_WRITE_REG(hw, IXGBE_PFVFLREC(index), (1 << vf_shift));
IXGBE_EVC_ADD(&hw->mbx.stats.rsts, 1);
}
return ret_val;
}
/**
* ixgbe_obtain_mbx_lock_pf - obtain mailbox lock
* @hw: pointer to the HW structure
* @vf_id: the VF index
*
* return SUCCESS if we obtained the mailbox lock
**/
static s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_id)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
int countdown = mbx->timeout;
s32 ret_val = IXGBE_ERR_MBX;
u32 pf_mailbox;
DEBUGFUNC("ixgbe_obtain_mbx_lock_pf");
if (!mbx->timeout)
return IXGBE_ERR_CONFIG;
while (countdown--) {
/* Reserve mailbox for PF use */
pf_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_id));
pf_mailbox |= IXGBE_PFMAILBOX_PFU;
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), pf_mailbox);
/* Verify that PF is the owner of the lock */
pf_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_id));
if (pf_mailbox & IXGBE_PFMAILBOX_PFU) {
ret_val = IXGBE_SUCCESS;
break;
}
/* Wait a bit before trying again */
usec_delay(mbx->usec_delay);
}
if (ret_val != IXGBE_SUCCESS) {
ERROR_REPORT1(IXGBE_ERROR_INVALID_STATE,
"Failed to obtain mailbox lock");
ret_val = IXGBE_ERR_TIMEOUT;
}
return ret_val;
}
/**
* ixgbe_release_mbx_lock_pf - release mailbox lock
* @hw: pointer to the HW structure
* @vf_id: the VF index
**/
static void ixgbe_release_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_id)
{
u32 pf_mailbox;
DEBUGFUNC("ixgbe_release_mbx_lock_pf");
/* Return ownership of the buffer */
pf_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_id));
pf_mailbox &= ~IXGBE_PFMAILBOX_PFU;
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), pf_mailbox);
}
/**
* ixgbe_write_mbx_pf_legacy - Places a message in the mailbox
* @hw: pointer to the HW structure
* @msg: The message buffer
* @size: Length of buffer
* @vf_id: the VF index
*
* returns SUCCESS if it successfully copied message into the buffer
**/
static s32 ixgbe_write_mbx_pf_legacy(struct ixgbe_hw *hw, u32 *msg, u16 size,
u16 vf_id)
{
s32 ret_val;
u16 i;
DEBUGFUNC("ixgbe_write_mbx_pf_legacy");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_id);
if (ret_val)
return ret_val;
/* flush msg and acks as we are overwriting the message buffer */
ixgbe_check_for_msg_pf(hw, vf_id);
ixgbe_clear_msg_pf(hw, vf_id);
ixgbe_check_for_ack_pf(hw, vf_id);
ixgbe_clear_ack_pf(hw, vf_id);
/* copy the caller specified message to the mailbox memory buffer */
for (i = 0; i < size; i++)
IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_id), i, msg[i]);
/* Interrupt VF to tell it a message has been sent and release buffer*/
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), IXGBE_PFMAILBOX_STS);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_tx, 1);
return IXGBE_SUCCESS;
}
/**
* 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_id: 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_id)
{
u32 pf_mailbox;
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_id);
if (ret_val)
goto out;
/* flush msg and acks as we are overwriting the message buffer */
ixgbe_clear_msg_pf(hw, vf_id);
ixgbe_clear_ack_pf(hw, vf_id);
/* copy the caller specified message to the mailbox memory buffer */
for (i = 0; i < size; i++)
IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_id), i, msg[i]);
/* Interrupt VF to tell it a message has been sent */
pf_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_id));
pf_mailbox |= IXGBE_PFMAILBOX_STS;
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), pf_mailbox);
/* if msg sent wait until we receive an ack */
ixgbe_poll_for_ack(hw, vf_id);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_tx, 1);
out:
hw->mbx.ops[vf_id].release(hw, vf_id);
return ret_val;
}
/**
* ixgbe_read_mbx_pf_legacy - Read a message from the mailbox
* @hw: pointer to the HW structure
* @msg: The message buffer
* @size: Length of buffer
* @vf_id: 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_legacy(struct ixgbe_hw *hw, u32 *msg, u16 size,
u16 vf_id)
{
s32 ret_val;
u16 i;
DEBUGFUNC("ixgbe_read_mbx_pf_legacy");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_id);
if (ret_val != IXGBE_SUCCESS)
return ret_val;
/* copy the message to the mailbox memory buffer */
for (i = 0; i < size; i++)
msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_id), i);
/* Acknowledge the message and release buffer */
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), IXGBE_PFMAILBOX_ACK);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_rx, 1);
return IXGBE_SUCCESS;
}
/**
* 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_id: 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_id)
{
u32 pf_mailbox;
s32 ret_val;
u16 i;
DEBUGFUNC("ixgbe_read_mbx_pf");
/* check if there is a message from VF */
ret_val = ixgbe_check_for_msg_pf(hw, vf_id);
if (ret_val != IXGBE_SUCCESS)
return IXGBE_ERR_MBX_NOMSG;
ixgbe_clear_msg_pf(hw, vf_id);
/* copy the message to the mailbox memory buffer */
for (i = 0; i < size; i++)
msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_id), i);
/* Acknowledge the message and release buffer */
pf_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_id));
pf_mailbox |= IXGBE_PFMAILBOX_ACK;
IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_id), pf_mailbox);
/* update stats */
IXGBE_EVC_ADD(&hw->mbx.stats.msgs_rx, 1);
return IXGBE_SUCCESS;
}
/**
* ixgbe_clear_mbx_pf - Clear Mailbox Memory
* @hw: pointer to the HW structure
* @vf_id: the VF index
*
* Set VFMBMEM of given VF to 0x0.
**/
static s32 ixgbe_clear_mbx_pf(struct ixgbe_hw *hw, u16 vf_id)
{
u16 mbx_size = hw->mbx.size;
u16 i;
if (vf_id > 63)
return IXGBE_ERR_PARAM;
for (i = 0; i < mbx_size; ++i)
IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_id), i, 0x0);
return IXGBE_SUCCESS;
}
/**
* ixgbe_init_mbx_params_pf_id - set initial values for pf mailbox
* @hw: pointer to the HW structure
* @vf_id: the VF index
*
* Initializes single set of the hw->mbx struct to correct values for pf mailbox
* Set of legacy functions is being used here
*/
void ixgbe_init_mbx_params_pf_id(struct ixgbe_hw *hw, u16 vf_id)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
mbx->ops[vf_id].release = ixgbe_release_mbx_lock_dummy;
mbx->ops[vf_id].read = ixgbe_read_mbx_pf_legacy;
mbx->ops[vf_id].write = ixgbe_write_mbx_pf_legacy;
mbx->ops[vf_id].check_for_msg = ixgbe_check_for_msg_pf;
mbx->ops[vf_id].check_for_ack = ixgbe_check_for_ack_pf;
mbx->ops[vf_id].check_for_rst = ixgbe_check_for_rst_pf;
mbx->ops[vf_id].clear = ixgbe_clear_mbx_pf;
}
/**
* ixgbe_init_mbx_params_pf - set initial values for pf mailbox
* @hw: pointer to the HW structure
*
* Initializes all sets of the hw->mbx struct to correct values for pf
* mailbox. One set corresponds to single VF. It also initializes counters
* and general variables. A set of legacy functions is used by default.
*/
void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw)
{
u16 i;
struct ixgbe_mbx_info *mbx = &hw->mbx;
/* Ensure we are not calling this function from VF */
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;
/* Initialize common mailbox settings */
mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
mbx->size = IXGBE_VFMAILBOX_SIZE;
/* Initialize counters with zeroes */
IXGBE_EVC_STORE(&mbx->stats.msgs_tx, 0);
IXGBE_EVC_STORE(&mbx->stats.msgs_rx, 0);
IXGBE_EVC_STORE(&mbx->stats.reqs, 0);
IXGBE_EVC_STORE(&mbx->stats.acks, 0);
IXGBE_EVC_STORE(&mbx->stats.rsts, 0);
/* No matter of VF number, we initialize params for all 64 VFs. */
/* TODO: 1. Add a define for max VF and refactor SHARED to get rid
* of magic number for that (63 or 64 depending on use case.)
* 2. rewrite the code to dynamically allocate mbx->ops[vf_id] for
* certain number of VFs instead of default maximum value of 64 (0..63)
*/
for (i = 0; i < 64; i++)
ixgbe_init_mbx_params_pf_id(hw, i);
}
/**
* ixgbe_upgrade_mbx_params_pf - Upgrade initial values for pf mailbox
* @hw: pointer to the HW structure
* @vf_id: the VF index
*
* Initializes the hw->mbx struct to new function set for improved
* stability and handling of messages.
*/
void ixgbe_upgrade_mbx_params_pf(struct ixgbe_hw *hw, u16 vf_id)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
/* Ensure we are not calling this function from VF */
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 = IXGBE_VF_MBX_INIT_TIMEOUT;
mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY;
mbx->size = IXGBE_VFMAILBOX_SIZE;
mbx->ops[vf_id].release = ixgbe_release_mbx_lock_pf;
mbx->ops[vf_id].read = ixgbe_read_mbx_pf;
mbx->ops[vf_id].write = ixgbe_write_mbx_pf;
mbx->ops[vf_id].check_for_msg = ixgbe_check_for_msg_pf;
mbx->ops[vf_id].check_for_ack = ixgbe_check_for_ack_pf;
mbx->ops[vf_id].check_for_rst = ixgbe_check_for_rst_pf;
mbx->ops[vf_id].clear = ixgbe_clear_mbx_pf;
}