qed: Bulletin and Link

Up to this point, VF and PF communication always originates from VF.
As a result, VF cannot be notified of any async changes, and specifically
cannot be informed of the current link state.

This introduces the bulletin board, the mechanism through which the PF
is going to communicate async notifications back to the VF. basically,
it's a well-defined structure agreed by both PF and VF which the VF would
continuously poll and into which the PF would DMA messages when needed.
[Bulletin board is actually allocated and communicated in previous patches
but never before used]

Based on the bulletin infrastructure, the VF can query its link status
and receive said async carrier changes.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 156 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_vf.h b/drivers/net/ethernet/qlogic/qed/qed_vf.h
index 35337b186aa5..eb99c2569779 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_vf.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_vf.h
@@ -10,6 +10,7 @@
 #define _QED_VF_H
 
 #include "qed_l2.h"
+#include "qed_mcp.h"
 
 #define T_ETH_INDIRECTION_TABLE_SIZE 128
 #define T_ETH_RSS_KEY_SIZE 10
@@ -377,6 +378,46 @@ struct qed_bulletin_content {
 
 	/* bitmap indicating which fields hold valid values */
 	u64 valid_bitmap;
+
+	/* used for MAC_ADDR or MAC_ADDR_FORCED */
+	u8 mac[ETH_ALEN];
+
+	/* If valid, 1 => only untagged Rx if no vlan is configured */
+	u8 default_only_untagged;
+	u8 padding;
+
+	/* The following is a 'copy' of qed_mcp_link_state,
+	 * qed_mcp_link_params and qed_mcp_link_capabilities. Since it's
+	 * possible the structs will increase further along the road we cannot
+	 * have it here; Instead we need to have all of its fields.
+	 */
+	u8 req_autoneg;
+	u8 req_autoneg_pause;
+	u8 req_forced_rx;
+	u8 req_forced_tx;
+	u8 padding2[4];
+
+	u32 req_adv_speed;
+	u32 req_forced_speed;
+	u32 req_loopback;
+	u32 padding3;
+
+	u8 link_up;
+	u8 full_duplex;
+	u8 autoneg;
+	u8 autoneg_complete;
+	u8 parallel_detection;
+	u8 pfc_enabled;
+	u8 partner_tx_flow_ctrl_en;
+	u8 partner_rx_flow_ctrl_en;
+	u8 partner_adv_pause;
+	u8 sfp_tx_fault;
+	u8 padding4[6];
+
+	u32 speed;
+	u32 partner_adv_speed;
+
+	u32 capability_speed;
 };
 
 struct qed_bulletin {
@@ -433,6 +474,43 @@ struct qed_vf_iov {
 
 #ifdef CONFIG_QED_SRIOV
 /**
+ * @brief Read the VF bulletin and act on it if needed
+ *
+ * @param p_hwfn
+ * @param p_change - qed fills 1 iff bulletin board has changed, 0 otherwise.
+ *
+ * @return enum _qed_status
+ */
+int qed_vf_read_bulletin(struct qed_hwfn *p_hwfn, u8 *p_change);
+
+/**
+ * @brief Get link paramters for VF from qed
+ *
+ * @param p_hwfn
+ * @param params - the link params structure to be filled for the VF
+ */
+void qed_vf_get_link_params(struct qed_hwfn *p_hwfn,
+			    struct qed_mcp_link_params *params);
+
+/**
+ * @brief Get link state for VF from qed
+ *
+ * @param p_hwfn
+ * @param link - the link state structure to be filled for the VF
+ */
+void qed_vf_get_link_state(struct qed_hwfn *p_hwfn,
+			   struct qed_mcp_link_state *link);
+
+/**
+ * @brief Get link capabilities for VF from qed
+ *
+ * @param p_hwfn
+ * @param p_link_caps - the link capabilities structure to be filled for the VF
+ */
+void qed_vf_get_link_caps(struct qed_hwfn *p_hwfn,
+			  struct qed_mcp_link_capabilities *p_link_caps);
+
+/**
  * @brief Get number of Rx queues allocated for VF by qed
  *
  *  @param p_hwfn
@@ -577,6 +655,7 @@ int qed_vf_pf_reset(struct qed_hwfn *p_hwfn);
  * @return enum _qed_status
  */
 int qed_vf_pf_release(struct qed_hwfn *p_hwfn);
+
 /**
  * @brief qed_vf_get_igu_sb_id - Get the IGU SB ID for a given
  *        sb_id. For VFs igu sbs don't have to be contiguous
@@ -631,7 +710,58 @@ void qed_vf_pf_filter_mcast(struct qed_hwfn *p_hwfn,
  * @return enum _qed_status
  */
 int qed_vf_pf_int_cleanup(struct qed_hwfn *p_hwfn);
+
+/**
+ * @brief - return the link params in a given bulletin board
+ *
+ * @param p_hwfn
+ * @param p_params - pointer to a struct to fill with link params
+ * @param p_bulletin
+ */
+void __qed_vf_get_link_params(struct qed_hwfn *p_hwfn,
+			      struct qed_mcp_link_params *p_params,
+			      struct qed_bulletin_content *p_bulletin);
+
+/**
+ * @brief - return the link state in a given bulletin board
+ *
+ * @param p_hwfn
+ * @param p_link - pointer to a struct to fill with link state
+ * @param p_bulletin
+ */
+void __qed_vf_get_link_state(struct qed_hwfn *p_hwfn,
+			     struct qed_mcp_link_state *p_link,
+			     struct qed_bulletin_content *p_bulletin);
+
+/**
+ * @brief - return the link capabilities in a given bulletin board
+ *
+ * @param p_hwfn
+ * @param p_link - pointer to a struct to fill with link capabilities
+ * @param p_bulletin
+ */
+void __qed_vf_get_link_caps(struct qed_hwfn *p_hwfn,
+			    struct qed_mcp_link_capabilities *p_link_caps,
+			    struct qed_bulletin_content *p_bulletin);
+
+void qed_iov_vf_task(struct work_struct *work);
 #else
+static inline void qed_vf_get_link_params(struct qed_hwfn *p_hwfn,
+					  struct qed_mcp_link_params *params)
+{
+}
+
+static inline void qed_vf_get_link_state(struct qed_hwfn *p_hwfn,
+					 struct qed_mcp_link_state *link)
+{
+}
+
+static inline void
+qed_vf_get_link_caps(struct qed_hwfn *p_hwfn,
+		     struct qed_mcp_link_capabilities *p_link_caps)
+{
+}
+
 static inline void qed_vf_get_num_rxqs(struct qed_hwfn *p_hwfn, u8 *num_rxqs)
 {
 }
@@ -741,6 +871,32 @@ static inline int qed_vf_pf_int_cleanup(struct qed_hwfn *p_hwfn)
 {
 	return -EINVAL;
 }
+
+static inline void __qed_vf_get_link_params(struct qed_hwfn *p_hwfn,
+					    struct qed_mcp_link_params
+					    *p_params,
+					    struct qed_bulletin_content
+					    *p_bulletin)
+{
+}
+
+static inline void __qed_vf_get_link_state(struct qed_hwfn *p_hwfn,
+					   struct qed_mcp_link_state *p_link,
+					   struct qed_bulletin_content
+					   *p_bulletin)
+{
+}
+
+static inline void
+__qed_vf_get_link_caps(struct qed_hwfn *p_hwfn,
+		       struct qed_mcp_link_capabilities *p_link_caps,
+		       struct qed_bulletin_content *p_bulletin)
+{
+}
+
+static inline void qed_iov_vf_task(struct work_struct *work)
+{
+}
 #endif
 
 #endif