bnx2x: Loopback in diag mode

When loading in diag mode, set the device to loopback instead of normal link and
then changing it to loopback mode

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 33 insertions, 24 deletions

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index a14fe7544844..96e23fd7eb4a 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -2064,7 +2064,7 @@ static void bnx2x_link_report(struct bnx2x *bp)
         }
 }
 
-static u8 bnx2x_initial_phy_init(struct bnx2x *bp)
+static u8 bnx2x_initial_phy_init(struct bnx2x *bp, int load_mode)
 {
         if (!BP_NOMCP(bp)) {
                 u8 rc;
@@ -2080,14 +2080,20 @@ static u8 bnx2x_initial_phy_init(struct bnx2x *bp)
                         bp->link_params.req_fc_auto_adv = BNX2X_FLOW_CTRL_BOTH;
 
                 bnx2x_acquire_phy_lock(bp);
+
+                if (load_mode == LOAD_DIAG)
+                        bp->link_params.loopback_mode = LOOPBACK_XGXS_10;
+
                 rc = bnx2x_phy_init(&bp->link_params, &bp->link_vars);
+
                 bnx2x_release_phy_lock(bp);
 
                 bnx2x_calc_fc_adv(bp);
 
-                if (bp->link_vars.link_up)
+                if (CHIP_REV_IS_SLOW(bp) && bp->link_vars.link_up) {
+                        bnx2x_stats_handle(bp, STATS_EVENT_LINK_UP);
                         bnx2x_link_report(bp);
-
+                }
 
                 return rc;
         }
@@ -6942,7 +6948,7 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
                 bnx2x_set_mac_addr_e1h(bp, 1);
 
         if (bp->port.pmf)
-                bnx2x_initial_phy_init(bp);
+                bnx2x_initial_phy_init(bp, load_mode);
 
         /* Start fast path */
         switch (load_mode) {
@@ -9328,23 +9334,23 @@ static int bnx2x_run_loopback(struct bnx2x *bp, int loopback_mode, u8 link_up)
         u16 len;
         int rc = -ENODEV;
 
-        if (loopback_mode == BNX2X_MAC_LOOPBACK) {
+        /* check the loopback mode */
+        switch (loopback_mode) {
+        case BNX2X_PHY_LOOPBACK:
+                if (bp->link_params.loopback_mode != LOOPBACK_XGXS_10)
+                        return -EINVAL;
+                break;
+        case BNX2X_MAC_LOOPBACK:
                 bp->link_params.loopback_mode = LOOPBACK_BMAC;
                 bnx2x_phy_init(&bp->link_params, &bp->link_vars);
-
-        } else if (loopback_mode == BNX2X_PHY_LOOPBACK) {
-                u16 cnt = 1000;
-                bp->link_params.loopback_mode = LOOPBACK_XGXS_10;
-                bnx2x_phy_init(&bp->link_params, &bp->link_vars);
-                /* wait until link state is restored */
-                if (link_up)
-                        while (cnt-- && bnx2x_test_link(&bp->link_params,
-                                                        &bp->link_vars))
-                                msleep(10);
-        } else
+                break;
+        default:
                 return -EINVAL;
+        }
 
-        pkt_size = 1514;
+        /* prepare the loopback packet */
+        pkt_size = (((bp->dev->mtu < ETH_MAX_PACKET_SIZE) ?
+                     bp->dev->mtu : ETH_MAX_PACKET_SIZE) + ETH_HLEN);
         skb = netdev_alloc_skb(bp->dev, bp->rx_buf_size);
         if (!skb) {
                 rc = -ENOMEM;
@@ -9356,6 +9362,7 @@ static int bnx2x_run_loopback(struct bnx2x *bp, int loopback_mode, u8 link_up)
         for (i = ETH_HLEN; i < pkt_size; i++)
                 packet[i] = (unsigned char) (i & 0xff);
 
+        /* send the loopback packet */
         num_pkts = 0;
         tx_start_idx = le16_to_cpu(*fp->tx_cons_sb);
         rx_start_idx = le16_to_cpu(*fp->rx_cons_sb);
@@ -9440,7 +9447,7 @@ test_loopback_exit:
 
 static int bnx2x_test_loopback(struct bnx2x *bp, u8 link_up)
 {
-        int rc = 0;
+        int rc = 0, res;
 
         if (!netif_running(bp->dev))
                 return BNX2X_LOOPBACK_FAILED;
@@ -9448,14 +9455,16 @@ static int bnx2x_test_loopback(struct bnx2x *bp, u8 link_up)
         bnx2x_netif_stop(bp, 1);
         bnx2x_acquire_phy_lock(bp);
 
-        if (bnx2x_run_loopback(bp, BNX2X_MAC_LOOPBACK, link_up)) {
-                DP(NETIF_MSG_PROBE, "MAC loopback failed\n");
-                rc |= BNX2X_MAC_LOOPBACK_FAILED;
+        res = bnx2x_run_loopback(bp, BNX2X_PHY_LOOPBACK, link_up);
+        if (res) {
+                DP(NETIF_MSG_PROBE, "  PHY loopback failed  (res %d)\n", res);
+                rc |= BNX2X_PHY_LOOPBACK_FAILED;
         }
 
-        if (bnx2x_run_loopback(bp, BNX2X_PHY_LOOPBACK, link_up)) {
-                DP(NETIF_MSG_PROBE, "PHY loopback failed\n");
-                rc |= BNX2X_PHY_LOOPBACK_FAILED;
+        res = bnx2x_run_loopback(bp, BNX2X_MAC_LOOPBACK, link_up);
+        if (res) {
+                DP(NETIF_MSG_PROBE, "  MAC loopback failed  (res %d)\n", res);
+                rc |= BNX2X_MAC_LOOPBACK_FAILED;
         }
 
         bnx2x_release_phy_lock(bp);