qlge: Add ethtool self-test.

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 137 insertions, 1 deletions

diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h
index 73c7fd2badcd..872e95ee40ee 100644
--- a/drivers/net/qlge/qlge.h
+++ b/drivers/net/qlge/qlge.h
@@ -1581,6 +1581,8 @@ enum {
         QL_ALLMULTI = 6,
         QL_PORT_CFG = 7,
         QL_CAM_RT_SET = 8,
+        QL_SELFTEST = 9,
+        QL_LB_LINK_UP = 10,
 };
 
 /* link_status bit definitions */
@@ -1717,6 +1719,7 @@ struct ql_adapter {
         struct completion ide_completion;
         struct nic_operations *nic_ops;
         u16 device_id;
+        atomic_t lb_count;
 };
 
 /*
@@ -1808,6 +1811,9 @@ int ql_mb_set_port_cfg(struct ql_adapter *qdev);
 int ql_wait_fifo_empty(struct ql_adapter *qdev);
 void ql_gen_reg_dump(struct ql_adapter *qdev,
                         struct ql_reg_dump *mpi_coredump);
+netdev_tx_t ql_lb_send(struct sk_buff *skb, struct net_device *ndev);
+void ql_check_lb_frame(struct ql_adapter *, struct sk_buff *);
+int ql_clean_lb_rx_ring(struct rx_ring *rx_ring, int budget);
 
 #if 1
 #define QL_ALL_DUMP
diff --git a/drivers/net/qlge/qlge_ethtool.c b/drivers/net/qlge/qlge_ethtool.c
index 62c4af057800..058fa0a48c6f 100644
--- a/drivers/net/qlge/qlge_ethtool.c
+++ b/drivers/net/qlge/qlge_ethtool.c
@@ -36,6 +36,11 @@
 
 #include "qlge.h"
 
+static const char ql_gstrings_test[][ETH_GSTRING_LEN] = {
+        "Loopback test  (offline)"
+};
+#define QLGE_TEST_LEN (sizeof(ql_gstrings_test) / ETH_GSTRING_LEN)
+
 static int ql_update_ring_coalescing(struct ql_adapter *qdev)
 {
         int i, status = 0;
@@ -251,6 +256,8 @@ static void ql_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
 static int ql_get_sset_count(struct net_device *dev, int sset)
 {
         switch (sset) {
+        case ETH_SS_TEST:
+                return QLGE_TEST_LEN;
         case ETH_SS_STATS:
                 return ARRAY_SIZE(ql_stats_str_arr);
         default:
@@ -429,6 +436,110 @@ static int ql_phys_id(struct net_device *ndev, u32 data)
         return 0;
 }
 
+static int ql_start_loopback(struct ql_adapter *qdev)
+{
+        if (netif_carrier_ok(qdev->ndev)) {
+                set_bit(QL_LB_LINK_UP, &qdev->flags);
+                netif_carrier_off(qdev->ndev);
+        } else
+                clear_bit(QL_LB_LINK_UP, &qdev->flags);
+        qdev->link_config |= CFG_LOOPBACK_PCS;
+        return ql_mb_set_port_cfg(qdev);
+}
+
+static void ql_stop_loopback(struct ql_adapter *qdev)
+{
+        qdev->link_config &= ~CFG_LOOPBACK_PCS;
+        ql_mb_set_port_cfg(qdev);
+        if (test_bit(QL_LB_LINK_UP, &qdev->flags)) {
+                netif_carrier_on(qdev->ndev);
+                clear_bit(QL_LB_LINK_UP, &qdev->flags);
+        }
+}
+
+static void ql_create_lb_frame(struct sk_buff *skb,
+                                        unsigned int frame_size)
+{
+        memset(skb->data, 0xFF, frame_size);
+        frame_size &= ~1;
+        memset(&skb->data[frame_size / 2], 0xAA, frame_size / 2 - 1);
+        memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
+        memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);
+}
+
+void ql_check_lb_frame(struct ql_adapter *qdev,
+                                        struct sk_buff *skb)
+{
+        unsigned int frame_size = skb->len;
+
+        if ((*(skb->data + 3) == 0xFF) &&
+                (*(skb->data + frame_size / 2 + 10) == 0xBE) &&
+                (*(skb->data + frame_size / 2 + 12) == 0xAF)) {
+                        atomic_dec(&qdev->lb_count);
+                        return;
+        }
+}
+
+static int ql_run_loopback_test(struct ql_adapter *qdev)
+{
+        int i;
+        netdev_tx_t rc;
+        struct sk_buff *skb;
+        unsigned int size = SMALL_BUF_MAP_SIZE;
+
+        for (i = 0; i < 64; i++) {
+                skb = netdev_alloc_skb(qdev->ndev, size);
+                if (!skb)
+                        return -ENOMEM;
+
+                skb->queue_mapping = 0;
+                skb_put(skb, size);
+                ql_create_lb_frame(skb, size);
+                rc = ql_lb_send(skb, qdev->ndev);
+                if (rc != NETDEV_TX_OK)
+                        return -EPIPE;
+                atomic_inc(&qdev->lb_count);
+        }
+
+        ql_clean_lb_rx_ring(&qdev->rx_ring[0], 128);
+        return atomic_read(&qdev->lb_count) ? -EIO : 0;
+}
+
+static int ql_loopback_test(struct ql_adapter *qdev, u64 *data)
+{
+        *data = ql_start_loopback(qdev);
+        if (*data)
+                goto out;
+        *data = ql_run_loopback_test(qdev);
+out:
+        ql_stop_loopback(qdev);
+        return *data;
+}
+
+static void ql_self_test(struct net_device *ndev,
+                                struct ethtool_test *eth_test, u64 *data)
+{
+        struct ql_adapter *qdev = netdev_priv(ndev);
+
+        if (netif_running(ndev)) {
+                set_bit(QL_SELFTEST, &qdev->flags);
+                if (eth_test->flags == ETH_TEST_FL_OFFLINE) {
+                        /* Offline tests */
+                        if (ql_loopback_test(qdev, &data[0]))
+                                eth_test->flags |= ETH_TEST_FL_FAILED;
+
+                } else {
+                        /* Online tests */
+                        data[0] = 0;
+                }
+                clear_bit(QL_SELFTEST, &qdev->flags);
+        } else {
+                QPRINTK(qdev, DRV, ERR,
+                        "%s: is down, Loopback test will fail.\n", ndev->name);
+                eth_test->flags |= ETH_TEST_FL_FAILED;
+        }
+}
+
 static int ql_get_regs_len(struct net_device *ndev)
 {
         return sizeof(struct ql_reg_dump);
@@ -575,6 +686,7 @@ const struct ethtool_ops qlge_ethtool_ops = {
         .set_msglevel = ql_set_msglevel,
         .get_link = ethtool_op_get_link,
         .phys_id                 = ql_phys_id,
+        .self_test               = ql_self_test,
         .get_pauseparam          = ql_get_pauseparam,
         .set_pauseparam          = ql_set_pauseparam,
         .get_rx_csum = ql_get_rx_csum,
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 42ad811ec313..4de054505ec6 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -1680,6 +1680,13 @@ static void ql_process_mac_rx_intr(struct ql_adapter *qdev,
                 return;
         }
 
+        /* loopback self test for ethtool */
+        if (test_bit(QL_SELFTEST, &qdev->flags)) {
+                ql_check_lb_frame(qdev, skb);
+                dev_kfree_skb_any(skb);
+                return;
+        }
+
         prefetch(skb->data);
         skb->dev = ndev;
         if (ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_M_MASK) {
@@ -2248,6 +2255,7 @@ static netdev_tx_t qlge_send(struct sk_buff *skb, struct net_device *ndev)
         return NETDEV_TX_OK;
 }
 
+
 static void ql_free_shadow_space(struct ql_adapter *qdev)
 {
         if (qdev->rx_ring_shadow_reg_area) {
@@ -4174,7 +4182,6 @@ err_out:
         return err;
 }
 
-
 static const struct net_device_ops qlge_netdev_ops = {
         .ndo_open               = qlge_open,
         .ndo_stop               = qlge_close,
@@ -4243,10 +4250,21 @@ static int __devinit qlge_probe(struct pci_dev *pdev,
         }
         ql_link_off(qdev);
         ql_display_dev_info(ndev);
+        atomic_set(&qdev->lb_count, 0);
         cards_found++;
         return 0;
 }
 
+netdev_tx_t ql_lb_send(struct sk_buff *skb, struct net_device *ndev)
+{
+        return qlge_send(skb, ndev);
+}
+
+int ql_clean_lb_rx_ring(struct rx_ring *rx_ring, int budget)
+{
+        return ql_clean_inbound_rx_ring(rx_ring, budget);
+}
+
 static void __devexit qlge_remove(struct pci_dev *pdev)
 {
         struct net_device *ndev = pci_get_drvdata(pdev);