staging: fsl-dpaa2/eth: Errors checking update

On the egress path, frame errors are reported using both a FD control
field and the frame annotation status. The current code only handles
FAS errors. Update to look at both fields when accounting Tx errors.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
index 26f209c..f7f6bed 100644 (file)
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -534,7 +534,7 @@ static void free_tx_fd(const struct dpaa2_eth_priv *priv,
         * buffer but before we free it. The caller function is responsible
         * for checking the status value.
         */
-       if (status && (dpaa2_fd_get_frc(fd) & DPAA2_FD_FRC_FASV))
+       if (status)
                *status = le32_to_cpu(fas->status);
 
        /* Free SGT buffer kmalloc'ed on tx */
@@ -638,6 +638,8 @@ static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv,
        struct rtnl_link_stats64 *percpu_stats;
        struct dpaa2_eth_drv_stats *percpu_extras;
        u32 status = 0;
+       u32 fd_errors;
+       bool has_fas_errors = false;
 
        /* Tracing point */
        trace_dpaa2_tx_conf_fd(priv->net_dev, fd);
@@ -646,13 +648,31 @@ static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv,
        percpu_extras->tx_conf_frames++;
        percpu_extras->tx_conf_bytes += dpaa2_fd_get_len(fd);
 
-       free_tx_fd(priv, fd, &status);
-
-       if (unlikely(status & DPAA2_ETH_TXCONF_ERR_MASK)) {
-               percpu_stats = this_cpu_ptr(priv->percpu_stats);
-               /* Tx-conf logically pertains to the egress path. */
-               percpu_stats->tx_errors++;
+       /* Check frame errors in the FD field */
+       fd_errors = dpaa2_fd_get_ctrl(fd) & DPAA2_FD_TX_ERR_MASK;
+       if (unlikely(fd_errors)) {
+               /* We only check error bits in the FAS field if corresponding
+                * FAERR bit is set in FD and the FAS field is marked as valid
+                */
+               has_fas_errors = (fd_errors & DPAA2_FD_CTRL_FAERR) &&
+                                !!(dpaa2_fd_get_frc(fd) & DPAA2_FD_FRC_FASV);
+               if (net_ratelimit())
+                       netdev_dbg(priv->net_dev, "TX frame FD error: %x08\n",
+                                  fd_errors);
        }
+
+       free_tx_fd(priv, fd, has_fas_errors ? &status : NULL);
+
+       if (likely(!fd_errors))
+               return;
+
+       percpu_stats = this_cpu_ptr(priv->percpu_stats);
+       /* Tx-conf logically pertains to the egress path. */
+       percpu_stats->tx_errors++;
+
+       if (has_fas_errors && net_ratelimit())
+               netdev_dbg(priv->net_dev, "TX frame FAS error: %x08\n",
+                          status & DPAA2_FAS_TX_ERR_MASK);
 }
 
 static int set_rx_csum(struct dpaa2_eth_priv *priv, bool enable)
@@ -2069,7 +2089,7 @@ static int bind_dpni(struct dpaa2_eth_priv *priv)
                netdev_err(net_dev, "Failed to configure hashing\n");
 
        /* Configure handling of error frames */
-       err_cfg.errors = DPAA2_ETH_RX_ERR_MASK;
+       err_cfg.errors = DPAA2_FAS_RX_ERR_MASK;
        err_cfg.set_frame_annotation = 1;
        err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD;
        err = dpni_set_errors_behavior(priv->mc_io, 0, priv->mc_token,

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
index 886a068..e6d28a2 100644 (file)
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
@@ -120,6 +120,19 @@ struct dpaa2_eth_swa {
 #define DPAA2_FD_FRC_FASWOV            0x0800
 #define DPAA2_FD_FRC_FAICFDV           0x0400
 
+/* Error bits in FD CTRL */
+#define DPAA2_FD_CTRL_UFD              0x00000004
+#define DPAA2_FD_CTRL_SBE              0x00000008
+#define DPAA2_FD_CTRL_FSE              0x00000010
+#define DPAA2_FD_CTRL_FAERR            0x00000020
+
+#define DPAA2_FD_RX_ERR_MASK           (DPAA2_FD_CTRL_SBE      | \
+                                        DPAA2_FD_CTRL_FAERR)
+#define DPAA2_FD_TX_ERR_MASK           (DPAA2_FD_CTRL_UFD      | \
+                                        DPAA2_FD_CTRL_SBE      | \
+                                        DPAA2_FD_CTRL_FSE      | \
+                                        DPAA2_FD_CTRL_FAERR)
+
 /* Annotation bits in FD CTRL */
 #define DPAA2_FD_CTRL_ASAL             0x00020000      /* ASAL = 128 */
 #define DPAA2_FD_CTRL_PTA              0x00800000
@@ -177,7 +190,7 @@ struct dpaa2_fas {
 /* L4 csum error */
 #define DPAA2_FAS_L4CE                 0x00000001
 /* Possible errors on the ingress path */
-#define DPAA2_ETH_RX_ERR_MASK          (DPAA2_FAS_KSE          | \
+#define DPAA2_FAS_RX_ERR_MASK          (DPAA2_FAS_KSE          | \
                                         DPAA2_FAS_EOFHE        | \
                                         DPAA2_FAS_MNLE         | \
                                         DPAA2_FAS_TIDE         | \
@@ -191,7 +204,7 @@ struct dpaa2_fas {
                                         DPAA2_FAS_L3CE         | \
                                         DPAA2_FAS_L4CE)
 /* Tx errors */
-#define DPAA2_ETH_TXCONF_ERR_MASK      (DPAA2_FAS_KSE          | \
+#define DPAA2_FAS_TX_ERR_MASK          (DPAA2_FAS_KSE          | \
                                         DPAA2_FAS_EOFHE        | \
                                         DPAA2_FAS_MNLE         | \
                                         DPAA2_FAS_TIDE)