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path: root/drivers/net/ethernet/intel/igb/e1000_mbx.c
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Diffstat (limited to 'drivers/net/ethernet/intel/igb/e1000_mbx.c')
-rw-r--r--drivers/net/ethernet/intel/igb/e1000_mbx.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/e1000_mbx.c b/drivers/net/ethernet/intel/igb/e1000_mbx.c
index 00e263f0c030..6aa44723507b 100644
--- a/drivers/net/ethernet/intel/igb/e1000_mbx.c
+++ b/drivers/net/ethernet/intel/igb/e1000_mbx.c
@@ -125,6 +125,24 @@ s32 igb_check_for_rst(struct e1000_hw *hw, u16 mbx_id)
}
/**
+ * 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
@@ -341,6 +359,26 @@ static s32 igb_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number)
}
/**
+ * 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
@@ -437,6 +475,7 @@ s32 igb_init_mbx_params_pf(struct e1000_hw *hw)
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;