pasemi_mac: basic error checking

pasemi_mac: basic error checking

Add some rudimentary error checking to pasemi_mac.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 41 insertions, 5 deletions

diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index c2d34a804d40..b297a67d2fbe 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -445,6 +445,38 @@ static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 }
 
 
+static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx)
+{
+        unsigned int rcmdsta, ccmdsta;
+
+        if (!netif_msg_rx_err(mac))
+                return;
+
+        rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
+        ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
+
+        printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
+                macrx, *mac->rx_status);
+
+        printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
+                rcmdsta, ccmdsta);
+}
+
+static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx)
+{
+        unsigned int cmdsta;
+
+        if (!netif_msg_tx_err(mac))
+                return;
+
+        cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
+
+        printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
+                "tx status 0x%016lx\n", mactx, *mac->tx_status);
+
+        printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
+}
+
 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 {
         unsigned int n;
@@ -468,10 +500,13 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
                 prefetchw(dp);
                 macrx = dp->macrx;
 
+                if ((macrx & XCT_MACRX_E) ||
+                    (*mac->rx_status & PAS_STATUS_ERROR))
+                        pasemi_mac_rx_error(mac, macrx);
+
                 if (!(macrx & XCT_MACRX_O))
                         break;
 
-
                 info = NULL;
 
                 /* We have to scan for our skb since there's no way
@@ -563,6 +598,10 @@ restart:
         for (i = start; i < limit; i++) {
                 dp = &TX_DESC(mac, i);
 
+                if ((dp->mactx & XCT_MACTX_E) ||
+                    (*mac->tx_status & PAS_STATUS_ERROR))
+                        pasemi_mac_tx_error(mac, dp->mactx);
+
                 if (unlikely(dp->mactx & XCT_MACTX_O))
                         /* Not yet transmitted */
                         break;
@@ -607,9 +646,6 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
                 return IRQ_NONE;
 
-        if (*mac->rx_status & PAS_STATUS_ERROR)
-                printk("rx_status reported error\n");
-
         /* Don't reset packet count so it won't fire again but clear
          * all others.
          */
@@ -1230,7 +1266,7 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
                         err);
                 goto out;
-        } else
+        } else if netif_msg_probe(mac)
                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
                        "hw addr %s\n",
                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",