Ejemplo n.º 1
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;

}
Ejemplo n.º 2
0
/**
 *  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;
}
Ejemplo n.º 3
0
/**
 *  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;
}
Ejemplo n.º 4
0
/**
 *  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;
}
Ejemplo n.º 5
0
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;

}
Ejemplo n.º 6
0
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;
}