diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/atm/solos-pci.c | 95 |
1 files changed, 53 insertions, 42 deletions
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c index 63c9ad03aec..acba08df5eb 100644 --- a/drivers/atm/solos-pci.c +++ b/drivers/atm/solos-pci.c @@ -68,6 +68,8 @@ #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2) #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE) +#define RX_DMA_SIZE 2048 + static int debug = 0; static int atmdebug = 0; static int firmware_upgrade = 0; @@ -608,17 +610,11 @@ void solos_bh(unsigned long card_arg) if (card->using_dma) { skb = card->rx_skb[port]; - pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr, skb->len, - PCI_DMA_FROMDEVICE); - - card->rx_skb[port] = alloc_skb(2048, GFP_ATOMIC); - if (card->rx_skb[port]) { - SKB_CB(card->rx_skb[port])->dma_addr = - pci_map_single(card->dev, skb->data, skb->len, - PCI_DMA_FROMDEVICE); - iowrite32(SKB_CB(card->rx_skb[port])->dma_addr, - card->config_regs + RX_DMA_ADDR(port)); - } + card->rx_skb[port] = NULL; + + pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr, + RX_DMA_SIZE, PCI_DMA_FROMDEVICE); + header = (void *)skb->data; size = le16_to_cpu(header->size); skb_put(skb, size + sizeof(*header)); @@ -669,7 +665,7 @@ void solos_bh(unsigned long card_arg) case PKT_STATUS: process_status(card, port, skb); - dev_kfree_skb(skb); + dev_kfree_skb_any(skb); break; case PKT_COMMAND: @@ -681,12 +677,32 @@ void solos_bh(unsigned long card_arg) if (net_ratelimit()) dev_warn(&card->dev->dev, "Dropping console response on port %d\n", port); + dev_kfree_skb_any(skb); } else skb_queue_tail(&card->cli_queue[port], skb); spin_unlock(&card->cli_queue_lock); break; } } + /* Allocate RX skbs for any ports which need them */ + if (card->using_dma && card->atmdev[port] && + !card->rx_skb[port]) { + struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC); + if (skb) { + SKB_CB(skb)->dma_addr = + pci_map_single(card->dev, skb->data, + RX_DMA_SIZE, PCI_DMA_FROMDEVICE); + iowrite32(SKB_CB(skb)->dma_addr, + card->config_regs + RX_DMA_ADDR(port)); + card->rx_skb[port] = skb; + } else { + if (net_ratelimit()) + dev_warn(&card->dev->dev, "Failed to allocate RX skb"); + + /* We'll have to try again later */ + tasklet_schedule(&card->tlet); + } + } } if (rx_done) iowrite32(rx_done, card->config_regs + FLAGS_ADDR); @@ -901,50 +917,45 @@ static int fpga_tx(struct solos_card *card) for (port = 0; port < card->nr_ports; port++) { if (card->atmdev[port] && !(tx_pending & (1 << port))) { + struct sk_buff *oldskb = card->tx_skb[port]; + if (oldskb) + pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr, + oldskb->len, PCI_DMA_TODEVICE); + spin_lock(&card->tx_queue_lock); skb = skb_dequeue(&card->tx_queue[port]); spin_unlock(&card->tx_queue_lock); - if (!skb) + if (skb && !card->using_dma) { + memcpy_toio(TX_BUF(card, port), skb->data, skb->len); + tx_started |= 1 << port; //Set TX full flag + oldskb = skb; /* We're done with this skb already */ + } else if (skb && card->using_dma) { + SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data, + skb->len, PCI_DMA_TODEVICE); + iowrite32(SKB_CB(skb)->dma_addr, + card->config_regs + TX_DMA_ADDR(port)); + } + + if (!oldskb) continue; + /* Clean up and free oldskb now it's gone */ if (atmdebug) { dev_info(&card->dev->dev, "Transmitted: port %d\n", port); - print_buffer(skb); + print_buffer(oldskb); } - if (card->using_dma) { - if (card->tx_skb[port]) { - struct sk_buff *oldskb = card->tx_skb[port]; - - pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr, - oldskb->len, PCI_DMA_TODEVICE); - - vcc = SKB_CB(oldskb)->vcc; - - if (vcc) { - atomic_inc(&vcc->stats->tx); - solos_pop(vcc, oldskb); - } else - dev_kfree_skb_irq(oldskb); - } - SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data, - skb->len, PCI_DMA_TODEVICE); - iowrite32(SKB_CB(skb)->dma_addr, card->config_regs + TX_DMA_ADDR(port)); - } else { - memcpy_toio(TX_BUF(card, port), skb->data, skb->len); - tx_started |= 1 << port; //Set TX full flag + vcc = SKB_CB(oldskb)->vcc; - vcc = SKB_CB(skb)->vcc; + if (vcc) { + atomic_inc(&vcc->stats->tx); + solos_pop(vcc, oldskb); + } else + dev_kfree_skb_irq(oldskb); - if (vcc) { - atomic_inc(&vcc->stats->tx); - solos_pop(vcc, skb); - } else - dev_kfree_skb_irq(skb); - } } } if (tx_started) |