476 lines
11 KiB
C
476 lines
11 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/* Copyright(c) 2007 - 2018 Intel Corporation. */
|
||
|
|
|
||
|
|
#include "e1000_mbx.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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
|
||
|
|
* @unlock: skip locking or not
|
||
|
|
*
|
||
|
|
* returns SUCCESS if it successfully read message from buffer
|
||
|
|
**/
|
||
|
|
s32 igb_read_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id,
|
||
|
|
bool unlock)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_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, unlock);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_write_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = 0;
|
||
|
|
|
||
|
|
if (size > mbx->size)
|
||
|
|
ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
else if (mbx->ops.write)
|
||
|
|
ret_val = mbx->ops.write(hw, msg, size, mbx_id);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_msg(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (mbx->ops.check_for_msg)
|
||
|
|
ret_val = mbx->ops.check_for_msg(hw, mbx_id);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_ack(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (mbx->ops.check_for_ack)
|
||
|
|
ret_val = mbx->ops.check_for_ack(hw, mbx_id);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_rst(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (mbx->ops.check_for_rst)
|
||
|
|
ret_val = mbx->ops.check_for_rst(hw, mbx_id);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_unlock_mbx - unlock the mailbox
|
||
|
|
* @hw: pointer to the HW structure
|
||
|
|
* @mbx_id: id of mailbox to check
|
||
|
|
*
|
||
|
|
* returns SUCCESS if the mailbox was unlocked or else ERR_MBX
|
||
|
|
**/
|
||
|
|
s32 igb_unlock_mbx(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (mbx->ops.unlock)
|
||
|
|
ret_val = mbx->ops.unlock(hw, mbx_id);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_poll_for_msg(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
int countdown = mbx->timeout;
|
||
|
|
|
||
|
|
if (!countdown || !mbx->ops.check_for_msg)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
|
||
|
|
countdown--;
|
||
|
|
if (!countdown)
|
||
|
|
break;
|
||
|
|
udelay(mbx->usec_delay);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if we failed, all future posted messages fail until reset */
|
||
|
|
if (!countdown)
|
||
|
|
mbx->timeout = 0;
|
||
|
|
out:
|
||
|
|
return countdown ? 0 : -E1000_ERR_MBX;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_poll_for_ack(struct e1000_hw *hw, u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
int countdown = mbx->timeout;
|
||
|
|
|
||
|
|
if (!countdown || !mbx->ops.check_for_ack)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
|
||
|
|
countdown--;
|
||
|
|
if (!countdown)
|
||
|
|
break;
|
||
|
|
udelay(mbx->usec_delay);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if we failed, all future posted messages fail until reset */
|
||
|
|
if (!countdown)
|
||
|
|
mbx->timeout = 0;
|
||
|
|
out:
|
||
|
|
return countdown ? 0 : -E1000_ERR_MBX;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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.
|
||
|
|
**/
|
||
|
|
static s32 igb_read_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size,
|
||
|
|
u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (!mbx->ops.read)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
ret_val = igb_poll_for_msg(hw, mbx_id);
|
||
|
|
|
||
|
|
if (!ret_val)
|
||
|
|
ret_val = mbx->ops.read(hw, msg, size, mbx_id, true);
|
||
|
|
out:
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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
|
||
|
|
**/
|
||
|
|
static s32 igb_write_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size,
|
||
|
|
u16 mbx_id)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
s32 ret_val = -E1000_ERR_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 = igb_poll_for_ack(hw, mbx_id);
|
||
|
|
out:
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static s32 igb_check_for_bit_pf(struct e1000_hw *hw, u32 mask)
|
||
|
|
{
|
||
|
|
u32 mbvficr = rd32(E1000_MBVFICR);
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (mbvficr & mask) {
|
||
|
|
ret_val = 0;
|
||
|
|
wr32(E1000_MBVFICR, mask);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_msg_pf(struct e1000_hw *hw, u16 vf_number)
|
||
|
|
{
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (!igb_check_for_bit_pf(hw, E1000_MBVFICR_VFREQ_VF1 << vf_number)) {
|
||
|
|
ret_val = 0;
|
||
|
|
hw->mbx.stats.reqs++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_ack_pf(struct e1000_hw *hw, u16 vf_number)
|
||
|
|
{
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (!igb_check_for_bit_pf(hw, E1000_MBVFICR_VFACK_VF1 << vf_number)) {
|
||
|
|
ret_val = 0;
|
||
|
|
hw->mbx.stats.acks++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_check_for_rst_pf(struct e1000_hw *hw, u16 vf_number)
|
||
|
|
{
|
||
|
|
u32 vflre = rd32(E1000_VFLRE);
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
|
||
|
|
if (vflre & BIT(vf_number)) {
|
||
|
|
ret_val = 0;
|
||
|
|
wr32(E1000_VFLRE, BIT(vf_number));
|
||
|
|
hw->mbx.stats.rsts++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number)
|
||
|
|
{
|
||
|
|
s32 ret_val = -E1000_ERR_MBX;
|
||
|
|
u32 p2v_mailbox;
|
||
|
|
int count = 10;
|
||
|
|
|
||
|
|
do {
|
||
|
|
/* Take ownership of the buffer */
|
||
|
|
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU);
|
||
|
|
|
||
|
|
/* reserve mailbox for vf use */
|
||
|
|
p2v_mailbox = rd32(E1000_P2VMAILBOX(vf_number));
|
||
|
|
if (p2v_mailbox & E1000_P2VMAILBOX_PFU) {
|
||
|
|
ret_val = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
udelay(1000);
|
||
|
|
} while (count-- > 0);
|
||
|
|
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_release_mbx_lock_pf - release mailbox lock
|
||
|
|
* @hw: pointer to the HW structure
|
||
|
|
* @vf_number: the VF index
|
||
|
|
*
|
||
|
|
* return SUCCESS if we released the mailbox lock
|
||
|
|
**/
|
||
|
|
static s32 igb_release_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number)
|
||
|
|
{
|
||
|
|
u32 p2v_mailbox;
|
||
|
|
|
||
|
|
/* drop PF lock of mailbox, if set */
|
||
|
|
p2v_mailbox = rd32(E1000_P2VMAILBOX(vf_number));
|
||
|
|
if (p2v_mailbox & E1000_P2VMAILBOX_PFU)
|
||
|
|
wr32(E1000_P2VMAILBOX(vf_number),
|
||
|
|
p2v_mailbox & ~E1000_P2VMAILBOX_PFU);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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 igb_write_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
|
||
|
|
u16 vf_number)
|
||
|
|
{
|
||
|
|
s32 ret_val;
|
||
|
|
u16 i;
|
||
|
|
|
||
|
|
/* lock the mailbox to prevent pf/vf race condition */
|
||
|
|
ret_val = igb_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 */
|
||
|
|
igb_check_for_msg_pf(hw, vf_number);
|
||
|
|
igb_check_for_ack_pf(hw, vf_number);
|
||
|
|
|
||
|
|
/* copy the caller specified message to the mailbox memory buffer */
|
||
|
|
for (i = 0; i < size; i++)
|
||
|
|
array_wr32(E1000_VMBMEM(vf_number), i, msg[i]);
|
||
|
|
|
||
|
|
/* Interrupt VF to tell it a message has been sent and release buffer*/
|
||
|
|
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_STS);
|
||
|
|
|
||
|
|
/* update stats */
|
||
|
|
hw->mbx.stats.msgs_tx++;
|
||
|
|
|
||
|
|
out_no_write:
|
||
|
|
return ret_val;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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
|
||
|
|
* @unlock: unlock the mailbox when done?
|
||
|
|
*
|
||
|
|
* 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 igb_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
|
||
|
|
u16 vf_number, bool unlock)
|
||
|
|
{
|
||
|
|
s32 ret_val;
|
||
|
|
u16 i;
|
||
|
|
|
||
|
|
/* lock the mailbox to prevent pf/vf race condition */
|
||
|
|
ret_val = igb_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] = array_rd32(E1000_VMBMEM(vf_number), i);
|
||
|
|
|
||
|
|
/* Acknowledge the message and release mailbox lock (or not) */
|
||
|
|
if (unlock)
|
||
|
|
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK);
|
||
|
|
else
|
||
|
|
wr32(E1000_P2VMAILBOX(vf_number),
|
||
|
|
E1000_P2VMAILBOX_ACK | E1000_P2VMAILBOX_PFU);
|
||
|
|
|
||
|
|
/* update stats */
|
||
|
|
hw->mbx.stats.msgs_rx++;
|
||
|
|
|
||
|
|
out_no_read:
|
||
|
|
return ret_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* igb_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
|
||
|
|
*/
|
||
|
|
s32 igb_init_mbx_params_pf(struct e1000_hw *hw)
|
||
|
|
{
|
||
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
||
|
|
|
||
|
|
mbx->timeout = 0;
|
||
|
|
mbx->usec_delay = 0;
|
||
|
|
|
||
|
|
mbx->size = E1000_VFMAILBOX_SIZE;
|
||
|
|
|
||
|
|
mbx->ops.read = igb_read_mbx_pf;
|
||
|
|
mbx->ops.write = igb_write_mbx_pf;
|
||
|
|
mbx->ops.read_posted = igb_read_posted_mbx;
|
||
|
|
mbx->ops.write_posted = igb_write_posted_mbx;
|
||
|
|
mbx->ops.check_for_msg = igb_check_for_msg_pf;
|
||
|
|
mbx->ops.check_for_ack = igb_check_for_ack_pf;
|
||
|
|
mbx->ops.check_for_rst = igb_check_for_rst_pf;
|
||
|
|
mbx->ops.unlock = igb_release_mbx_lock_pf;
|
||
|
|
|
||
|
|
mbx->stats.msgs_tx = 0;
|
||
|
|
mbx->stats.msgs_rx = 0;
|
||
|
|
mbx->stats.reqs = 0;
|
||
|
|
mbx->stats.acks = 0;
|
||
|
|
mbx->stats.rsts = 0;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|