[BNX2]: Add PHY loopback test

Enhance the ethtool loopback test with PHY loopback test.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 79 insertions, 22 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 7be011f37d13..9f71cca81e91 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -1331,6 +1331,38 @@ bnx2_set_mac_loopback(struct bnx2 *bp)
         return 0;
 }
 
+static int bnx2_test_link(struct bnx2 *);
+
+static int
+bnx2_set_phy_loopback(struct bnx2 *bp)
+{
+        u32 mac_mode;
+        int rc, i;
+
+        spin_lock_bh(&bp->phy_lock);
+        rc = bnx2_write_phy(bp, MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX |
+                            BMCR_SPEED1000);
+        spin_unlock_bh(&bp->phy_lock);
+        if (rc)
+                return rc;
+
+        for (i = 0; i < 10; i++) {
+                if (bnx2_test_link(bp) == 0)
+                        break;
+                udelay(10);
+        }
+
+        mac_mode = REG_RD(bp, BNX2_EMAC_MODE);
+        mac_mode &= ~(BNX2_EMAC_MODE_PORT | BNX2_EMAC_MODE_HALF_DUPLEX |
+                      BNX2_EMAC_MODE_MAC_LOOP | BNX2_EMAC_MODE_FORCE_LINK |
+                      BNX2_EMAC_MODE_25G);
+
+        mac_mode |= BNX2_EMAC_MODE_PORT_GMII;
+        REG_WR(bp, BNX2_EMAC_MODE, mac_mode);
+        bp->link_up = 1;
+        return 0;
+}
+
 static int
 bnx2_fw_sync(struct bnx2 *bp, u32 msg_data, int silent)
 {
@@ -3907,26 +3939,33 @@ bnx2_test_memory(struct bnx2 *bp)
         return ret;
 }
 
+#define BNX2_MAC_LOOPBACK       0
+#define BNX2_PHY_LOOPBACK       1
+
 static int
-bnx2_test_loopback(struct bnx2 *bp)
+bnx2_run_loopback(struct bnx2 *bp, int loopback_mode)
 {
         unsigned int pkt_size, num_pkts, i;
         struct sk_buff *skb, *rx_skb;
         unsigned char *packet;
-        u16 rx_start_idx, rx_idx, send_idx;
-        u32 send_bseq, val;
+        u16 rx_start_idx, rx_idx;
+        u32 val;
         dma_addr_t map;
         struct tx_bd *txbd;
         struct sw_bd *rx_buf;
         struct l2_fhdr *rx_hdr;
         int ret = -ENODEV;
 
-        if (!netif_running(bp->dev))
-                return -ENODEV;
-
-        bp->loopback = MAC_LOOPBACK;
-        bnx2_reset_nic(bp, BNX2_DRV_MSG_CODE_DIAG);
-        bnx2_set_mac_loopback(bp);
+        if (loopback_mode == BNX2_MAC_LOOPBACK) {
+                bp->loopback = MAC_LOOPBACK;
+                bnx2_set_mac_loopback(bp);
+        }
+        else if (loopback_mode == BNX2_PHY_LOOPBACK) {
+                bp->loopback = 0;
+                bnx2_set_phy_loopback(bp);
+        }
+        else
+                return -EINVAL;
 
         pkt_size = 1514;
         skb = dev_alloc_skb(pkt_size);
@@ -3948,11 +3987,9 @@ bnx2_test_loopback(struct bnx2 *bp)
         udelay(5);
         rx_start_idx = bp->status_blk->status_rx_quick_consumer_index0;
 
-        send_idx = 0;
-        send_bseq = 0;
         num_pkts = 0;
 
-        txbd = &bp->tx_desc_ring[send_idx];
+        txbd = &bp->tx_desc_ring[TX_RING_IDX(bp->tx_prod)];
 
         txbd->tx_bd_haddr_hi = (u64) map >> 32;
         txbd->tx_bd_haddr_lo = (u64) map & 0xffffffff;
@@ -3960,13 +3997,11 @@ bnx2_test_loopback(struct bnx2 *bp)
         txbd->tx_bd_vlan_tag_flags = TX_BD_FLAGS_START | TX_BD_FLAGS_END;
 
         num_pkts++;
-        send_idx = NEXT_TX_BD(send_idx);
-
-        send_bseq += pkt_size;
-
-        REG_WR16(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BIDX, send_idx);
-        REG_WR(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BSEQ, send_bseq);
+        bp->tx_prod = NEXT_TX_BD(bp->tx_prod);
+        bp->tx_prod_bseq += pkt_size;
 
+        REG_WR16(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BIDX, bp->tx_prod);
+        REG_WR(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BSEQ, bp->tx_prod_bseq);
 
         udelay(100);
 
@@ -3979,7 +4014,7 @@ bnx2_test_loopback(struct bnx2 *bp)
         pci_unmap_single(bp->pdev, map, pkt_size, PCI_DMA_TODEVICE);
         dev_kfree_skb_irq(skb);
 
-        if (bp->status_blk->status_tx_quick_consumer_index0 != send_idx) {
+        if (bp->status_blk->status_tx_quick_consumer_index0 != bp->tx_prod) {
                 goto loopback_test_done;
         }
 
@@ -4025,6 +4060,30 @@ loopback_test_done:
         return ret;
 }
 
+#define BNX2_MAC_LOOPBACK_FAILED        1
+#define BNX2_PHY_LOOPBACK_FAILED        2
+#define BNX2_LOOPBACK_FAILED            (BNX2_MAC_LOOPBACK_FAILED |     \
+                                         BNX2_PHY_LOOPBACK_FAILED)
+
+static int
+bnx2_test_loopback(struct bnx2 *bp)
+{
+        int rc = 0;
+
+        if (!netif_running(bp->dev))
+                return BNX2_LOOPBACK_FAILED;
+
+        bnx2_reset_nic(bp, BNX2_DRV_MSG_CODE_RESET);
+        spin_lock_bh(&bp->phy_lock);
+        bnx2_init_phy(bp);
+        spin_unlock_bh(&bp->phy_lock);
+        if (bnx2_run_loopback(bp, BNX2_MAC_LOOPBACK))
+                rc |= BNX2_MAC_LOOPBACK_FAILED;
+        if (bnx2_run_loopback(bp, BNX2_PHY_LOOPBACK))
+                rc |= BNX2_PHY_LOOPBACK_FAILED;
+        return rc;
+}
+
 #define NVRAM_SIZE 0x200
 #define CRC32_RESIDUAL 0xdebb20e3
 
@@ -5169,10 +5228,8 @@ bnx2_self_test(struct net_device *dev, struct ethtool_test *etest, u64 *buf)
                         buf[1] = 1;
                         etest->flags |= ETH_TEST_FL_FAILED;
                 }
-                if (bnx2_test_loopback(bp) != 0) {
-                        buf[2] = 1;
+                if ((buf[2] = bnx2_test_loopback(bp)) != 0)
                         etest->flags |= ETH_TEST_FL_FAILED;
-                }
 
                 if (!netif_running(bp->dev)) {
                         bnx2_reset_chip(bp, BNX2_DRV_MSG_CODE_RESET);