qed: Read device port count from the shmem

Read port count from the shared memory instead of driver deriving this
value. This change simplifies the driver implementation and also avoids
any dependencies for finding the port-count.
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Michal Kalderon <mkalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed.h

@@ -753,6 +753,7 @@ struct qed_dev {
 #define CHIP_BOND_ID_SHIFT              0
 
 	u8				num_engines;
+	u8				num_ports;
 	u8				num_ports_in_engine;
 	u8				num_funcs_in_port;
 
@@ -892,7 +893,6 @@ void qed_configure_vp_wfq_on_link_change(struct qed_dev *cdev,
 
 void qed_clean_wfq_db(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 int qed_device_num_engines(struct qed_dev *cdev);
-int qed_device_get_port_id(struct qed_dev *cdev);
 void qed_set_fw_mac_addr(__le16 *fw_msb,
 			 __le16 *fw_mid, __le16 *fw_lsb, u8 *mac);
 
@@ -939,6 +939,10 @@ bool qed_edpm_enabled(struct qed_hwfn *p_hwfn);
 	writel((u32)val, (void __iomem *)((u8 __iomem *)\
 					  (cdev->doorbells) + (db_addr)))
 
+#define MFW_PORT(_p_hwfn)       ((_p_hwfn)->abs_pf_id %			  \
+				  qed_device_num_ports((_p_hwfn)->cdev))
+int qed_device_num_ports(struct qed_dev *cdev);
+
 /* Prototypes */
 int qed_fill_dev_info(struct qed_dev *cdev,
 		      struct qed_dev_info *dev_info);

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -3269,55 +3269,43 @@ static void qed_get_num_funcs(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 		   p_hwfn->enabled_func_idx, p_hwfn->num_funcs_on_engine);
 }
 
-static void qed_hw_info_port_num_bb(struct qed_hwfn *p_hwfn,
-				    struct qed_ptt *p_ptt)
-{
-	u32 port_mode;
-
-	port_mode = qed_rd(p_hwfn, p_ptt, CNIG_REG_NW_PORT_MODE_BB);
-
-	if (port_mode < 3) {
-		p_hwfn->cdev->num_ports_in_engine = 1;
-	} else if (port_mode <= 5) {
-		p_hwfn->cdev->num_ports_in_engine = 2;
-	} else {
-		DP_NOTICE(p_hwfn, "PORT MODE: %d not supported\n",
-			  p_hwfn->cdev->num_ports_in_engine);
-
-		/* Default num_ports_in_engine to something */
-		p_hwfn->cdev->num_ports_in_engine = 1;
-	}
-}
-
-static void qed_hw_info_port_num_ah(struct qed_hwfn *p_hwfn,
-				    struct qed_ptt *p_ptt)
+static void qed_hw_info_port_num(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 {
-	u32 port;
-	int i;
-
-	p_hwfn->cdev->num_ports_in_engine = 0;
+	u32 addr, global_offsize, global_addr, port_mode;
+	struct qed_dev *cdev = p_hwfn->cdev;
 
-	for (i = 0; i < MAX_NUM_PORTS_K2; i++) {
-		port = qed_rd(p_hwfn, p_ptt,
-			      CNIG_REG_NIG_PORT0_CONF_K2 + (i * 4));
-		if (port & 1)
-			p_hwfn->cdev->num_ports_in_engine++;
+	/* In CMT there is always only one port */
+	if (cdev->num_hwfns > 1) {
+		cdev->num_ports_in_engine = 1;
+		cdev->num_ports = 1;
+		return;
 	}
 
-	if (!p_hwfn->cdev->num_ports_in_engine) {
-		DP_NOTICE(p_hwfn, "All NIG ports are inactive\n");
-
-		/* Default num_ports_in_engine to something */
-		p_hwfn->cdev->num_ports_in_engine = 1;
+	/* Determine the number of ports per engine */
+	port_mode = qed_rd(p_hwfn, p_ptt, MISC_REG_PORT_MODE);
+	switch (port_mode) {
+	case 0x0:
+		cdev->num_ports_in_engine = 1;
+		break;
+	case 0x1:
+		cdev->num_ports_in_engine = 2;
+		break;
+	case 0x2:
+		cdev->num_ports_in_engine = 4;
+		break;
+	default:
+		DP_NOTICE(p_hwfn, "Unknown port mode 0x%08x\n", port_mode);
+		cdev->num_ports_in_engine = 1;	/* Default to something */
+		break;
 	}
-}
 
-static void qed_hw_info_port_num(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
-{
-	if (QED_IS_BB(p_hwfn->cdev))
-		qed_hw_info_port_num_bb(p_hwfn, p_ptt);
-	else
-		qed_hw_info_port_num_ah(p_hwfn, p_ptt);
+	/* Get the total number of ports of the device */
+	addr = SECTION_OFFSIZE_ADDR(p_hwfn->mcp_info->public_base,
+				    PUBLIC_GLOBAL);
+	global_offsize = qed_rd(p_hwfn, p_ptt, addr);
+	global_addr = SECTION_ADDR(global_offsize, 0);
+	addr = global_addr + offsetof(struct public_global, max_ports);
+	cdev->num_ports = (u8)qed_rd(p_hwfn, p_ptt, addr);
 }
 
 static void qed_get_eee_caps(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
@@ -3355,7 +3343,8 @@ qed_get_hw_info(struct qed_hwfn *p_hwfn,
 			return rc;
 	}
 
-	qed_hw_info_port_num(p_hwfn, p_ptt);
+	if (IS_LEAD_HWFN(p_hwfn))
+		qed_hw_info_port_num(p_hwfn, p_ptt);
 
 	qed_mcp_get_capabilities(p_hwfn, p_ptt);
 
@@ -4760,23 +4749,9 @@ void qed_clean_wfq_db(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 	       sizeof(*p_hwfn->qm_info.wfq_data) * p_hwfn->qm_info.num_vports);
 }
 
-int qed_device_num_engines(struct qed_dev *cdev)
-{
-	return QED_IS_BB(cdev) ? 2 : 1;
-}
-
-static int qed_device_num_ports(struct qed_dev *cdev)
-{
-	/* in CMT always only one port */
-	if (cdev->num_hwfns > 1)
-		return 1;
-
-	return cdev->num_ports_in_engine * qed_device_num_engines(cdev);
-}
-
-int qed_device_get_port_id(struct qed_dev *cdev)
+int qed_device_num_ports(struct qed_dev *cdev)
 {
-	return (QED_LEADING_HWFN(cdev)->abs_pf_id) % qed_device_num_ports(cdev);
+	return cdev->num_ports;
 }
 
 void qed_set_fw_mac_addr(__le16 *fw_msb,

drivers/net/ethernet/qlogic/qed/qed_l2.c

@@ -1898,6 +1898,7 @@ static void _qed_get_vport_stats(struct qed_dev *cdev,
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
 		struct qed_ptt *p_ptt = IS_PF(cdev) ? qed_ptt_acquire(p_hwfn)
 						    :  NULL;
+		bool b_get_port_stats;
 
 		if (IS_PF(cdev)) {
 			/* The main vport index is relative first */
@@ -1912,8 +1913,9 @@ static void _qed_get_vport_stats(struct qed_dev *cdev,
 			continue;
 		}
 
+		b_get_port_stats = IS_PF(cdev) && IS_LEAD_HWFN(p_hwfn);
 		__qed_get_vport_stats(p_hwfn, p_ptt, stats, fw_vport,
-				      IS_PF(cdev) ? true : false);
+				      b_get_port_stats);
 
 out:
 		if (IS_PF(cdev) && p_ptt)

drivers/net/ethernet/qlogic/qed/qed_mcp.h

@@ -691,10 +691,6 @@ int qed_mfw_process_tlv_req(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 					    rel_pfid)
 #define MCP_PF_ID(p_hwfn) MCP_PF_ID_BY_REL(p_hwfn, (p_hwfn)->rel_pf_id)
 
-#define MFW_PORT(_p_hwfn)       ((_p_hwfn)->abs_pf_id %			  \
-				 ((_p_hwfn)->cdev->num_ports_in_engine * \
-				  qed_device_num_engines((_p_hwfn)->cdev)))
-
 struct qed_mcp_info {
 	/* List for mailbox commands which were sent and wait for a response */
 	struct list_head			cmd_list;

drivers/net/ethernet/qlogic/qed/qed_ptp.c

@@ -47,7 +47,7 @@
 
 static enum qed_resc_lock qed_ptcdev_to_resc(struct qed_hwfn *p_hwfn)
 {
-	switch (qed_device_get_port_id(p_hwfn->cdev)) {
+	switch (MFW_PORT(p_hwfn)) {
 	case 0:
 		return QED_RESC_LOCK_PTP_PORT0;
 	case 1: