qed: Add link support

Physical link is handled by the management Firmware.
This patch lays the infrastructure for attention handling in the driver,
as link change notifications arrive via async. attentions,
as well the handling of such notifications.

This patch also extends the API with the protocol drivers by adding
registered callbacks which the protocol driver passes to qed in order
to be notified of async. events originating from the FW/HW.

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

1 files changed, 125 insertions, 1 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.h b/drivers/net/ethernet/qlogic/qed/qed_mcp.h
index 106d78a19937..dbaae586b4a7 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.h
@@ -15,6 +15,59 @@
 #include <linux/slab.h>
 #include "qed_hsi.h"
 
+struct qed_mcp_link_speed_params {
+	bool    autoneg;
+	u32     advertised_speeds;      /* bitmask of DRV_SPEED_CAPABILITY */
+	u32     forced_speed;	   /* In Mb/s */
+};
+
+struct qed_mcp_link_pause_params {
+	bool    autoneg;
+	bool    forced_rx;
+	bool    forced_tx;
+};
+
+struct qed_mcp_link_params {
+	struct qed_mcp_link_speed_params	speed;
+	struct qed_mcp_link_pause_params	pause;
+	u32				     loopback_mode;
+};
+
+struct qed_mcp_link_capabilities {
+	u32 speed_capabilities;
+};
+
+struct qed_mcp_link_state {
+	bool    link_up;
+
+	u32     speed; /* In Mb/s */
+	bool    full_duplex;
+
+	bool    an;
+	bool    an_complete;
+	bool    parallel_detection;
+	bool    pfc_enabled;
+
+#define QED_LINK_PARTNER_SPEED_1G_HD    BIT(0)
+#define QED_LINK_PARTNER_SPEED_1G_FD    BIT(1)
+#define QED_LINK_PARTNER_SPEED_10G      BIT(2)
+#define QED_LINK_PARTNER_SPEED_20G      BIT(3)
+#define QED_LINK_PARTNER_SPEED_40G      BIT(4)
+#define QED_LINK_PARTNER_SPEED_50G      BIT(5)
+#define QED_LINK_PARTNER_SPEED_100G     BIT(6)
+	u32     partner_adv_speed;
+
+	bool    partner_tx_flow_ctrl_en;
+	bool    partner_rx_flow_ctrl_en;
+
+#define QED_LINK_PARTNER_SYMMETRIC_PAUSE (1)
+#define QED_LINK_PARTNER_ASYMMETRIC_PAUSE (2)
+#define QED_LINK_PARTNER_BOTH_PAUSE (3)
+	u8      partner_adv_pause;
+
+	bool    sfp_tx_fault;
+};
+
 struct qed_mcp_function_info {
 	u8				pause_on_host;
 
@@ -45,6 +98,47 @@ struct qed_mcp_drv_version {
 };
 
 /**
+ * @brief - returns the link params of the hw function
+ *
+ * @param p_hwfn
+ *
+ * @returns pointer to link params
+ */
+struct qed_mcp_link_params *qed_mcp_get_link_params(struct qed_hwfn *);
+
+/**
+ * @brief - return the link state of the hw function
+ *
+ * @param p_hwfn
+ *
+ * @returns pointer to link state
+ */
+struct qed_mcp_link_state *qed_mcp_get_link_state(struct qed_hwfn *);
+
+/**
+ * @brief - return the link capabilities of the hw function
+ *
+ * @param p_hwfn
+ *
+ * @returns pointer to link capabilities
+ */
+struct qed_mcp_link_capabilities
+	*qed_mcp_get_link_capabilities(struct qed_hwfn *p_hwfn);
+
+/**
+ * @brief Request the MFW to set the the link according to 'link_input'.
+ *
+ * @param p_hwfn
+ * @param p_ptt
+ * @param b_up - raise link if `true'. Reset link if `false'.
+ *
+ * @return int
+ */
+int qed_mcp_set_link(struct qed_hwfn   *p_hwfn,
+		     struct qed_ptt     *p_ptt,
+		     bool               b_up);
+
+/**
  * @brief Get the management firmware version value
  *
  * @param cdev       - qed dev pointer
@@ -56,6 +150,19 @@ int qed_mcp_get_mfw_ver(struct qed_dev *cdev,
 			u32 *mfw_ver);
 
 /**
+ * @brief Get media type value of the port.
+ *
+ * @param cdev      - qed dev pointer
+ * @param mfw_ver    - media type value
+ *
+ * @return int -
+ *      0 - Operation was successul.
+ *      -EBUSY - Operation failed
+ */
+int qed_mcp_get_media_type(struct qed_dev      *cdev,
+			   u32                  *media_type);
+
+/**
  * @brief General function for sending commands to the MCP
  *        mailbox. It acquire mutex lock for the entire
  *        operation, from sending the request until the MCP
@@ -142,8 +249,10 @@ struct qed_mcp_info {
 	u32					port_addr;
 	u16					drv_mb_seq;
 	u16					drv_pulse_seq;
+	struct qed_mcp_link_params		link_input;
+	struct qed_mcp_link_state		link_output;
+	struct qed_mcp_link_capabilities	link_capabilities;
 	struct qed_mcp_function_info		func_info;
-
 	u8					*mfw_mb_cur;
 	u8					*mfw_mb_shadow;
 	u16					mfw_mb_length;
@@ -182,6 +291,21 @@ void qed_mcp_cmd_port_init(struct qed_hwfn *p_hwfn,
 int qed_mcp_free(struct qed_hwfn *p_hwfn);
 
 /**
+ * @brief This function is called from the DPC context. After
+ * pointing PTT to the mfw mb, check for events sent by the MCP
+ * to the driver and ack them. In case a critical event
+ * detected, it will be handled here, otherwise the work will be
+ * queued to a sleepable work-queue.
+ *
+ * @param p_hwfn - HW function
+ * @param p_ptt - PTT required for register access
+ * @return int - 0 - operation
+ * was successul.
+ */
+int qed_mcp_handle_events(struct qed_hwfn *p_hwfn,
+			  struct qed_ptt *p_ptt);
+
+/**
  * @brief Sends a LOAD_REQ to the MFW, and in case operation
  *        succeed, returns whether this PF is the first on the
  *        chip/engine/port or function. This function should be