[PATCH v1 12/22] net/ixgbe/base: added link state handling

[Anatoly Burakov <anatoly.burakov@intel.com>]

From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>

Adding a functionality that retrieves information from PF regarding
the link state of a given VF.
It is part of the general functionality that allows the PF driver
to control the state of the virtual link VF devices.

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
Reviewed-by: Tyl, RadoslawX <radoslawx.tyl@intel.com>
Reviewed-by: Skajewski, PiotrX <piotrx.skajewski@intel.com>
Reviewed-by: Michael, Alice <alice.michael@intel.com>
---
 drivers/net/ixgbe/base/ixgbe_mbx.h  |  1 +
 drivers/net/ixgbe/base/ixgbe_type.h |  1 +
 drivers/net/ixgbe/base/ixgbe_vf.c   | 29 +++++++++++++++++++++++++++++
 drivers/net/ixgbe/base/ixgbe_vf.h   |  1 +
 4 files changed, 32 insertions(+)

diff --git a/drivers/net/ixgbe/base/ixgbe_mbx.h b/drivers/net/ixgbe/base/ixgbe_mbx.h
index fadfccaabb..f368b1d745 100644
--- a/drivers/net/ixgbe/base/ixgbe_mbx.h
+++ b/drivers/net/ixgbe/base/ixgbe_mbx.h
@@ -123,6 +123,7 @@ enum ixgbe_pfvf_api_rev {
 #define IXGBE_VF_GET_RETA      0x0a    /* VF request for RETA */
 #define IXGBE_VF_GET_RSS_KEY	0x0b    /* get RSS key */
 #define IXGBE_VF_UPDATE_XCAST_MODE	0x0c
+#define IXGBE_VF_GET_LINK_STATE 0x10 /* get vf link state */
 
 /* mode choices for IXGBE_VF_UPDATE_XCAST_MODE */
 enum ixgbevf_xcast_modes {
diff --git a/drivers/net/ixgbe/base/ixgbe_type.h b/drivers/net/ixgbe/base/ixgbe_type.h
index 51b9ef274b..ec832fb1b0 100644
--- a/drivers/net/ixgbe/base/ixgbe_type.h
+++ b/drivers/net/ixgbe/base/ixgbe_type.h
@@ -3983,6 +3983,7 @@ struct ixgbe_mac_operations {
 				   ixgbe_mc_addr_itr);
 	s32 (*update_mc_addr_list)(struct ixgbe_hw *, u8 *, u32,
 				   ixgbe_mc_addr_itr, bool clear);
+	s32 (*get_link_state)(struct ixgbe_hw *, bool *);
 	s32 (*enable_mc)(struct ixgbe_hw *);
 	s32 (*disable_mc)(struct ixgbe_hw *);
 	s32 (*clear_vfta)(struct ixgbe_hw *);
diff --git a/drivers/net/ixgbe/base/ixgbe_vf.c b/drivers/net/ixgbe/base/ixgbe_vf.c
index 603c24b653..0d5b29ba50 100644
--- a/drivers/net/ixgbe/base/ixgbe_vf.c
+++ b/drivers/net/ixgbe/base/ixgbe_vf.c
@@ -46,6 +46,7 @@ s32 ixgbe_init_ops_vf(struct ixgbe_hw *hw)
 	hw->mac.ops.init_rx_addrs = NULL;
 	hw->mac.ops.update_mc_addr_list = ixgbe_update_mc_addr_list_vf;
 	hw->mac.ops.update_xcast_mode = ixgbevf_update_xcast_mode;
+	hw->mac.ops.get_link_state = ixgbe_get_link_state_vf;
 	hw->mac.ops.enable_mc = NULL;
 	hw->mac.ops.disable_mc = NULL;
 	hw->mac.ops.clear_vfta = NULL;
@@ -426,6 +427,34 @@ s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
 	return IXGBE_SUCCESS;
 }
 
+/**
+ * ixgbe_get_link_state_vf - Get VF link state from PF
+ * @hw: pointer to the HW structure
+ * @link_state: link state storage
+ *
+ * Returns state of the operation error or success.
+ **/
+s32 ixgbe_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
+{
+	u32 msgbuf[2];
+	s32 err;
+	s32 ret_val;
+
+	msgbuf[0] = IXGBE_VF_GET_LINK_STATE;
+	msgbuf[1] = 0x0;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
+
+	if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
+		ret_val = IXGBE_ERR_MBX;
+	} else {
+		ret_val = IXGBE_SUCCESS;
+		*link_state = msgbuf[1];
+	}
+
+	return ret_val;
+}
+
 /**
  * ixgbe_set_vfta_vf - Set/Unset vlan filter table address
  * @hw: pointer to the HW structure
diff --git a/drivers/net/ixgbe/base/ixgbe_vf.h b/drivers/net/ixgbe/base/ixgbe_vf.h
index be58b4f76e..bd10865d57 100644
--- a/drivers/net/ixgbe/base/ixgbe_vf.h
+++ b/drivers/net/ixgbe/base/ixgbe_vf.h
@@ -106,6 +106,7 @@ s32 ixgbe_update_mc_addr_list_vf(struct ixgbe_hw *hw, u8 *mc_addr_list,
 				 u32 mc_addr_count, ixgbe_mc_addr_itr,
 				 bool clear);
 s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode);
+s32 ixgbe_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state);
 s32 ixgbe_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 		      bool vlan_on, bool vlvf_bypass);
 s32 ixgbevf_rlpml_set_vf(struct ixgbe_hw *hw, u16 max_size);
-- 
2.43.0