bnx2x: Add and correct PCI link speed prints

This adds the print of the PCI gen3 link speed (8GHz), as well as correcting
the same print for 57712 boards (the print erroneously showed a 2.5GHz speed).
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x.h

@@ -2342,4 +2342,9 @@ enum {
 
 #define NUM_MACS	8
 
+enum bnx2x_pci_bus_speed {
+	BNX2X_PCI_LINK_SPEED_2500 = 2500,
+	BNX2X_PCI_LINK_SPEED_5000 = 5000,
+	BNX2X_PCI_LINK_SPEED_8000 = 8000
+};
 #endif /* bnx2x.h */

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -12111,15 +12111,26 @@ static int bnx2x_init_dev(struct bnx2x *bp, struct pci_dev *pdev,
 	return rc;
 }
 
-static void bnx2x_get_pcie_width_speed(struct bnx2x *bp, int *width, int *speed)
+static void bnx2x_get_pcie_width_speed(struct bnx2x *bp, int *width,
+				       enum bnx2x_pci_bus_speed *speed)
 {
-	u32 val = 0;
+	u32 link_speed, val = 0;
 
 	pci_read_config_dword(bp->pdev, PCICFG_LINK_CONTROL, &val);
 	*width = (val & PCICFG_LINK_WIDTH) >> PCICFG_LINK_WIDTH_SHIFT;
 
-	/* return value of 1=2.5GHz 2=5GHz */
-	*speed = (val & PCICFG_LINK_SPEED) >> PCICFG_LINK_SPEED_SHIFT;
+	link_speed = (val & PCICFG_LINK_SPEED) >> PCICFG_LINK_SPEED_SHIFT;
+
+	switch (link_speed) {
+	case 3:
+		*speed = BNX2X_PCI_LINK_SPEED_8000;
+		break;
+	case 2:
+		*speed = BNX2X_PCI_LINK_SPEED_5000;
+		break;
+	default:
+		*speed = BNX2X_PCI_LINK_SPEED_2500;
+	}
 }
 
 static int bnx2x_check_firmware(struct bnx2x *bp)
@@ -12482,7 +12493,8 @@ static int bnx2x_init_one(struct pci_dev *pdev,
 {
 	struct net_device *dev = NULL;
 	struct bnx2x *bp;
-	int pcie_width, pcie_speed;
+	int pcie_width;
+	enum bnx2x_pci_bus_speed pcie_speed;
 	int rc, max_non_def_sbs;
 	int rx_count, tx_count, rss_count, doorbell_size;
 	int max_cos_est;
@@ -12634,14 +12646,14 @@ static int bnx2x_init_one(struct pci_dev *pdev,
 	BNX2X_DEV_INFO("got pcie width %d and speed %d\n",
 		       pcie_width, pcie_speed);
 
-	BNX2X_DEV_INFO(
-		"%s (%c%d) PCI-E x%d %s found at mem %lx, IRQ %d, node addr %pM\n",
+	BNX2X_DEV_INFO("%s (%c%d) PCI-E x%d %s found at mem %lx, IRQ %d, node addr %pM\n",
 		       board_info[ent->driver_data].name,
 		       (CHIP_REV(bp) >> 12) + 'A', (CHIP_METAL(bp) >> 4),
 		       pcie_width,
-		    ((!CHIP_IS_E2(bp) && pcie_speed == 2) ||
-		     (CHIP_IS_E2(bp) && pcie_speed == 1)) ?
-		    "5GHz (Gen2)" : "2.5GHz",
+		       pcie_speed == BNX2X_PCI_LINK_SPEED_2500 ? "2.5GHz" :
+		       pcie_speed == BNX2X_PCI_LINK_SPEED_5000 ? "5.0GHz" :
+		       pcie_speed == BNX2X_PCI_LINK_SPEED_8000 ? "8.0GHz" :
+		       "Unknown",
 		       dev->base_addr, bp->pdev->irq, dev->dev_addr);
 
 	return 0;