/**
* 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;
}
/**
* e1000_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 e1000_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
u16 vf_number)
{
s32 ret_val;
u16 i;
DEBUGFUNC("e1000_read_mbx_pf");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = e1000_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] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i);
/* Acknowledge the message and release buffer */
E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK);
/* update stats */
hw->mbx.stats.msgs_rx++;
out_no_read:
return ret_val;
}
/**
* e1000_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 successfuly read message from buffer
**/
static s32 e1000_read_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size,
u16 E1000_UNUSEDARG mbx_id)
{
s32 ret_val = E1000_SUCCESS;
u16 i;
DEBUGFUNC("e1000_read_mbx_vf");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = e1000_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] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(0), i);
/* Acknowledge receipt and release mailbox, then we're done */
E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_ACK);
/* update stats */
hw->mbx.stats.msgs_rx++;
out_no_read:
return ret_val;
}
/**
* e1000_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 e1000_write_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size,
u16 E1000_UNUSEDARG mbx_id)
{
s32 ret_val;
u16 i;
DEBUGFUNC("e1000_write_mbx_vf");
/* lock the mailbox to prevent pf/vf race condition */
ret_val = e1000_obtain_mbx_lock_vf(hw);
if (ret_val)
goto out_no_write;
/* flush msg and acks as we are overwriting the message buffer */
e1000_check_for_msg_vf(hw, 0);
e1000_check_for_ack_vf(hw, 0);
/* copy the caller specified message to the mailbox memory buffer */
for (i = 0; i < size; i++)
E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(0), i, msg[i]);
/* update stats */
hw->mbx.stats.msgs_tx++;
/* Drop VFU and interrupt the PF to tell it a message has been sent */
E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_REQ);
out_no_write:
return ret_val;
}
static s32 igb_write_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
u16 vf_number)
{
s32 ret_val;
u16 i;
/* */
ret_val = igb_obtain_mbx_lock_pf(hw, vf_number);
if (ret_val)
goto out_no_write;
/* */
igb_check_for_msg_pf(hw, vf_number);
igb_check_for_ack_pf(hw, vf_number);
/* */
for (i = 0; i < size; i++)
array_wr32(E1000_VMBMEM(vf_number), i, msg[i]);
/* */
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_STS);
/* */
hw->mbx.stats.msgs_tx++;
out_no_write:
return ret_val;
}
static s32 igb_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
u16 vf_number)
{
s32 ret_val;
u16 i;
/* */
ret_val = igb_obtain_mbx_lock_pf(hw, vf_number);
if (ret_val)
goto out_no_read;
/* */
for (i = 0; i < size; i++)
msg[i] = array_rd32(E1000_VMBMEM(vf_number), i);
/* */
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK);
/* */
hw->mbx.stats.msgs_rx++;
out_no_read:
return ret_val;
}
