return ret_val;
}
+/**
+ * txgbe_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 txgbe_poll_for_msg(struct txgbe_hw *hw, u16 mbx_id)
+{
+ struct txgbe_mbx_info *mbx = &hw->mbx;
+ int countdown = mbx->timeout;
+
+ DEBUGFUNC("txgbe_poll_for_msg");
+
+ if (!countdown || !mbx->check_for_msg)
+ goto out;
+
+ while (countdown && mbx->check_for_msg(hw, mbx_id)) {
+ countdown--;
+ if (!countdown)
+ break;
+ usec_delay(mbx->usec_delay);
+ }
+
+ if (countdown == 0)
+ DEBUGOUT("Polling for VF%d mailbox message timedout", mbx_id);
+
+out:
+ return countdown ? 0 : TXGBE_ERR_MBX;
+}
+
+/**
+ * txgbe_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 txgbe_poll_for_ack(struct txgbe_hw *hw, u16 mbx_id)
+{
+ struct txgbe_mbx_info *mbx = &hw->mbx;
+ int countdown = mbx->timeout;
+
+ DEBUGFUNC("txgbe_poll_for_ack");
+
+ if (!countdown || !mbx->check_for_ack)
+ goto out;
+
+ while (countdown && mbx->check_for_ack(hw, mbx_id)) {
+ countdown--;
+ if (!countdown)
+ break;
+ usec_delay(mbx->usec_delay);
+ }
+
+ if (countdown == 0)
+ DEBUGOUT("Polling for VF%d mailbox ack timedout", mbx_id);
+
+out:
+ return countdown ? 0 : TXGBE_ERR_MBX;
+}
+
+/**
+ * txgbe_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.
+ **/
+s32 txgbe_read_posted_mbx(struct txgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id)
+{
+ struct txgbe_mbx_info *mbx = &hw->mbx;
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ DEBUGFUNC("txgbe_read_posted_mbx");
+
+ if (!mbx->read)
+ goto out;
+
+ ret_val = txgbe_poll_for_msg(hw, mbx_id);
+
+ /* if ack received read message, otherwise we timed out */
+ if (!ret_val)
+ ret_val = mbx->read(hw, msg, size, mbx_id);
+out:
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_write_posted_mbx(struct txgbe_hw *hw, u32 *msg, u16 size,
+ u16 mbx_id)
+{
+ struct txgbe_mbx_info *mbx = &hw->mbx;
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ DEBUGFUNC("txgbe_write_posted_mbx");
+
+ /* exit if either we can't write or there isn't a defined timeout */
+ if (!mbx->write || !mbx->timeout)
+ goto out;
+
+ /* send msg */
+ ret_val = mbx->write(hw, msg, size, mbx_id);
+
+ /* if msg sent wait until we receive an ack */
+ if (!ret_val)
+ ret_val = txgbe_poll_for_ack(hw, mbx_id);
+out:
+ return ret_val;
+}
+
+/**
+ * txgbe_read_v2p_mailbox - read v2p mailbox
+ * @hw: pointer to the HW structure
+ *
+ * This function is used to read the v2p mailbox without losing the read to
+ * clear status bits.
+ **/
+STATIC u32 txgbe_read_v2p_mailbox(struct txgbe_hw *hw)
+{
+ u32 v2p_mailbox = rd32(hw, TXGBE_VFMBCTL);
+
+ v2p_mailbox |= hw->mbx.v2p_mailbox;
+ hw->mbx.v2p_mailbox |= v2p_mailbox & TXGBE_VFMBCTL_R2C_BITS;
+
+ return v2p_mailbox;
+}
+
+/**
+ * txgbe_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 txgbe_check_for_bit_vf(struct txgbe_hw *hw, u32 mask)
+{
+ u32 v2p_mailbox = txgbe_read_v2p_mailbox(hw);
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ if (v2p_mailbox & mask)
+ ret_val = 0;
+
+ hw->mbx.v2p_mailbox &= ~mask;
+
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_check_for_msg_vf(struct txgbe_hw *hw, u16 mbx_id)
+{
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ UNREFERENCED_PARAMETER(mbx_id);
+ DEBUGFUNC("txgbe_check_for_msg_vf");
+
+ if (!txgbe_check_for_bit_vf(hw, TXGBE_VFMBCTL_PFSTS)) {
+ ret_val = 0;
+ hw->mbx.stats.reqs++;
+ }
+
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_check_for_ack_vf(struct txgbe_hw *hw, u16 mbx_id)
+{
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ UNREFERENCED_PARAMETER(mbx_id);
+ DEBUGFUNC("txgbe_check_for_ack_vf");
+
+ if (!txgbe_check_for_bit_vf(hw, TXGBE_VFMBCTL_PFACK)) {
+ ret_val = 0;
+ hw->mbx.stats.acks++;
+ }
+
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_check_for_rst_vf(struct txgbe_hw *hw, u16 mbx_id)
+{
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ UNREFERENCED_PARAMETER(mbx_id);
+ DEBUGFUNC("txgbe_check_for_rst_vf");
+
+ if (!txgbe_check_for_bit_vf(hw, (TXGBE_VFMBCTL_RSTD |
+ TXGBE_VFMBCTL_RSTI))) {
+ ret_val = 0;
+ hw->mbx.stats.rsts++;
+ }
+
+ return ret_val;
+}
+
+/**
+ * txgbe_obtain_mbx_lock_vf - obtain mailbox lock
+ * @hw: pointer to the HW structure
+ *
+ * return SUCCESS if we obtained the mailbox lock
+ **/
+STATIC s32 txgbe_obtain_mbx_lock_vf(struct txgbe_hw *hw)
+{
+ s32 ret_val = TXGBE_ERR_MBX;
+
+ DEBUGFUNC("txgbe_obtain_mbx_lock_vf");
+
+ /* Take ownership of the buffer */
+ wr32(hw, TXGBE_VFMBCTL, TXGBE_VFMBCTL_VFU);
+
+ /* reserve mailbox for vf use */
+ if (txgbe_read_v2p_mailbox(hw) & TXGBE_VFMBCTL_VFU)
+ ret_val = 0;
+
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_write_mbx_vf(struct txgbe_hw *hw, u32 *msg, u16 size,
+ u16 mbx_id)
+{
+ s32 ret_val;
+ u16 i;
+
+ UNREFERENCED_PARAMETER(mbx_id);
+
+ DEBUGFUNC("txgbe_write_mbx_vf");
+
+ /* lock the mailbox to prevent pf/vf race condition */
+ ret_val = txgbe_obtain_mbx_lock_vf(hw);
+ if (ret_val)
+ goto out_no_write;
+
+ /* flush msg and acks as we are overwriting the message buffer */
+ txgbe_check_for_msg_vf(hw, 0);
+ txgbe_check_for_ack_vf(hw, 0);
+
+ /* copy the caller specified message to the mailbox memory buffer */
+ for (i = 0; i < size; i++)
+ wr32a(hw, TXGBE_VFMBX, i, msg[i]);
+
+ /* update stats */
+ hw->mbx.stats.msgs_tx++;
+
+ /* Drop VFU and interrupt the PF to tell it a message has been sent */
+ wr32(hw, TXGBE_VFMBCTL, TXGBE_VFMBCTL_REQ);
+
+out_no_write:
+ return ret_val;
+}
+
+/**
+ * txgbe_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
+ **/
+s32 txgbe_read_mbx_vf(struct txgbe_hw *hw, u32 *msg, u16 size,
+ u16 mbx_id)
+{
+ s32 ret_val = 0;
+ u16 i;
+
+ DEBUGFUNC("txgbe_read_mbx_vf");
+ UNREFERENCED_PARAMETER(mbx_id);
+
+ /* lock the mailbox to prevent pf/vf race condition */
+ ret_val = txgbe_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] = rd32a(hw, TXGBE_VFMBX, i);
+
+ /* Acknowledge receipt and release mailbox, then we're done */
+ wr32(hw, TXGBE_VFMBCTL, TXGBE_VFMBCTL_ACK);
+
+ /* update stats */
+ hw->mbx.stats.msgs_rx++;
+
+out_no_read:
+ return ret_val;
+}
+
+/**
+ * txgbe_init_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 txgbe_init_mbx_params_vf(struct txgbe_hw *hw)
+{
+ struct txgbe_mbx_info *mbx = &hw->mbx;
+
+ /* start mailbox as timed out and let the reset_hw call set the timeout
+ * value to begin communications
+ */
+ mbx->timeout = 0;
+ mbx->usec_delay = TXGBE_VF_MBX_INIT_DELAY;
+
+ mbx->size = TXGBE_P2VMBX_SIZE;
+
+ mbx->stats.msgs_tx = 0;
+ mbx->stats.msgs_rx = 0;
+ mbx->stats.reqs = 0;
+ mbx->stats.acks = 0;
+ mbx->stats.rsts = 0;
+}
+
STATIC s32 txgbe_check_for_bit_pf(struct txgbe_hw *hw, u32 mask, s32 index)
{
u32 mbvficr = rd32(hw, TXGBE_MBVFICR(index));
git.droids-corp.org / dpdk.git / blobdiff