cxgb3 - FW versioning

[linux-2.6] / drivers / net / spider_net.c

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index f58741239196442d72ef36c15e8b59ead61c676e..d73018b5cfc8b23c801e73939247ef792d12713c 100644 (file)
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -367,21 +367,20 @@ spider_net_free_rx_chain_contents(struct spider_net_card *card)
 }
 
 /**
- * spider_net_prepare_rx_descr - reinitializes a rx descriptor
+ * spider_net_prepare_rx_descr - Reinitialize RX descriptor
  * @card: card structure
  * @descr: descriptor to re-init
  *
- * return 0 on succes, <0 on failure
+ * Return 0 on succes, <0 on failure.
  *
- * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
- * Activate the descriptor state-wise
+ * Allocates a new rx skb, iommu-maps it and attaches it to the
+ * descriptor. Mark the descriptor as activated, ready-to-use.
  */
 static int
 spider_net_prepare_rx_descr(struct spider_net_card *card,
                            struct spider_net_descr *descr)
 {
        dma_addr_t buf;
-       int error = 0;
        int offset;
        int bufsize;
 
@@ -409,7 +408,7 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
                (SPIDER_NET_RXBUF_ALIGN - 1);
        if (offset)
                skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
-       /* io-mmu-map the skb */
+       /* iommu-map the skb */
        buf = pci_map_single(card->pdev, descr->skb->data,
                        SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
        descr->buf_addr = buf;
@@ -420,11 +419,12 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
                card->spider_stats.rx_iommu_map_error++;
                descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
        } else {
+               wmb();
                descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
                                         SPIDER_NET_DMAC_NOINTR_COMPLETE;
        }
 
-       return error;
+       return 0;
 }
 
 /**
@@ -488,10 +488,10 @@ spider_net_refill_rx_chain(struct spider_net_card *card)
 }
 
 /**
- * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
+ * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
  * @card: card structure
  *
- * returns 0 on success, <0 on failure
+ * Returns 0 on success, <0 on failure.
  */
 static int
 spider_net_alloc_rx_skbs(struct spider_net_card *card)
@@ -502,16 +502,16 @@ spider_net_alloc_rx_skbs(struct spider_net_card *card)
        result = -ENOMEM;
 
        chain = &card->rx_chain;
-       /* put at least one buffer into the chain. if this fails,
-        * we've got a problem. if not, spider_net_refill_rx_chain
-        * will do the rest at the end of this function */
+       /* Put at least one buffer into the chain. if this fails,
+        * we've got a problem. If not, spider_net_refill_rx_chain
+        * will do the rest at the end of this function. */
        if (spider_net_prepare_rx_descr(card, chain->head))
                goto error;
        else
                chain->head = chain->head->next;
 
-       /* this will allocate the rest of the rx buffers; if not, it's
-        * business as usual later on */
+       /* This will allocate the rest of the rx buffers;
+        * if not, it's business as usual later on. */
        spider_net_refill_rx_chain(card);
        spider_net_enable_rxdmac(card);
        return 0;
@@ -961,6 +961,34 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
        card->netdev_stats.rx_bytes += skb->len;
 }
 
+#ifdef DEBUG
+static void show_rx_chain(struct spider_net_card *card)
+{
+       struct spider_net_descr_chain *chain = &card->rx_chain;
+       struct spider_net_descr *start= chain->tail;
+       struct spider_net_descr *descr= start;
+       int status;
+
+       int cnt = 0;
+       int cstat = spider_net_get_descr_status(descr);
+       printk(KERN_INFO "RX chain tail at descr=%ld\n",
+            (start - card->descr) - card->tx_chain.num_desc);
+       status = cstat;
+       do
+       {
+               status = spider_net_get_descr_status(descr);
+               if (cstat != status) {
+                       printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
+                       cstat = status;
+                       cnt = 0;
+               }
+               cnt ++;
+               descr = descr->next;
+       } while (descr != start);
+       printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
+}
+#endif
+
 /**
  * spider_net_decode_one_descr - processes an rx descriptor
  * @card: card structure
@@ -1021,6 +1049,24 @@ spider_net_decode_one_descr(struct spider_net_card *card)
                goto bad_desc;
        }
 
+       if (descr->dmac_cmd_status & 0xfefe) {
+               pr_err("%s: bad status, cmd_status=x%08x\n",
+                              card->netdev->name,
+                              descr->dmac_cmd_status);
+               pr_err("buf_addr=x%08x\n", descr->buf_addr);
+               pr_err("buf_size=x%08x\n", descr->buf_size);
+               pr_err("next_descr_addr=x%08x\n", descr->next_descr_addr);
+               pr_err("result_size=x%08x\n", descr->result_size);
+               pr_err("valid_size=x%08x\n", descr->valid_size);
+               pr_err("data_status=x%08x\n", descr->data_status);
+               pr_err("data_error=x%08x\n", descr->data_error);
+               pr_err("bus_addr=x%08x\n", descr->bus_addr);
+               pr_err("which=%ld\n", descr - card->rx_chain.ring);
+
+               card->spider_stats.rx_desc_error++;
+               goto bad_desc;
+       }
+
        /* Ok, we've got a packet in descr */
        spider_net_pass_skb_up(descr, card);
        descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;