/**
* e1000_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 e1000_check_for_bit_vf(struct e1000_hw *hw, u32 mask)
{
u32 v2p_mailbox = e1000_read_v2p_mailbox(hw);
s32 ret_val = -E1000_ERR_MBX;
if (v2p_mailbox & mask)
ret_val = E1000_SUCCESS;
hw->dev_spec.vf.v2p_mailbox &= ~mask;
return ret_val;
}
/**
* e1000_obtain_mbx_lock_vf - obtain mailbox lock
* @hw: pointer to the HW structure
*
* return SUCCESS if we obtained the mailbox lock
**/
static s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw)
{
s32 ret_val = -E1000_ERR_MBX;
/* Take ownership of the buffer */
ew32(V2PMAILBOX(0), E1000_V2PMAILBOX_VFU);
/* reserve mailbox for vf use */
if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU)
ret_val = E1000_SUCCESS;
return ret_val;
}
/**
* e1000_obtain_mbx_lock_vf - obtain mailbox lock
* @hw: pointer to the HW structure
*
* return SUCCESS if we obtained the mailbox lock
**/
static s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw)
{
s32 ret_val = -E1000_ERR_MBX;
int count = 10;
do {
/* Take ownership of the buffer */
ew32(V2PMAILBOX(0), E1000_V2PMAILBOX_VFU);
/* reserve mailbox for VF use */
if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) {
ret_val = 0;
break;
}
udelay(1000);
} while (count-- > 0);
return ret_val;
}
/**
* e1000_obtain_mbx_lock_vf - obtain mailbox lock
* @hw: pointer to the HW structure
*
* return SUCCESS if we obtained the mailbox lock
**/
static s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw)
{
s32 ret_val = -E1000_ERR_MBX;
int count = 10;
DEBUGFUNC("e1000_obtain_mbx_lock_vf");
do {
/* Take ownership of the buffer */
E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU);
/* reserve mailbox for vf use */
if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) {
ret_val = E1000_SUCCESS;
break;
}
usec_delay(1000);
} while (count-- > 0);
return ret_val;
}