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[PATCH] sky2: tx/rx ring data structure split 

Split Tx and Rx ring into two different data structures.
Tx needs the next value (to handle partial status), and
Rx always needs the mapaddr (to handle resubmitting same buffer).

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Stephen Hemminger 2005-12-09 11:35:01 -08:00 committed by Jeff Garzik
parent 734d186846
commit 6cdbbdf305
2 changed files with 20 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/net/sky2.c
View File

@ -958,7 +958,7 @@ static int sky2_up(struct net_device *dev)
if (!sky2->tx_le)
goto err_out;
sky2->tx_ring = kzalloc(TX_RING_SIZE * sizeof(struct ring_info),
sky2->tx_ring = kcalloc(TX_RING_SIZE, sizeof(struct tx_ring_info),
GFP_KERNEL);
if (!sky2->tx_ring)
goto err_out;
@ -970,7 +970,7 @@ static int sky2_up(struct net_device *dev)
goto err_out;
memset(sky2->rx_le, 0, RX_LE_BYTES);
sky2->rx_ring = kzalloc(sky2->rx_pending * sizeof(struct ring_info),
sky2->rx_ring = kcalloc(sky2->rx_pending, sizeof(struct ring_info),
GFP_KERNEL);
if (!sky2->rx_ring)
goto err_out;
@ -1070,7 +1070,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
struct sky2_port *sky2 = netdev_priv(dev);
struct sky2_hw *hw = sky2->hw;
struct sky2_tx_le *le = NULL;
struct ring_info *re;
struct tx_ring_info *re;
unsigned i, len;
dma_addr_t mapping;
u32 addr64;
@ -1173,11 +1173,11 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
/* Record the transmit mapping info */
re->skb = skb;
re->mapaddr = mapping;
pci_unmap_addr_set(re, mapaddr, mapping);
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
struct ring_info *fre;
struct tx_ring_info *fre;
mapping = pci_map_page(hw->pdev, frag->page, frag->page_offset,
frag->size, PCI_DMA_TODEVICE);
@ -1198,9 +1198,9 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
fre = sky2->tx_ring
+ ((re - sky2->tx_ring) + i + 1) % TX_RING_SIZE;
fre->skb = NULL;
fre->mapaddr = mapping;
pci_unmap_addr_set(fre, mapaddr, mapping);
}
re->idx = sky2->tx_prod;
le->ctrl |= EOP;
@ -1239,7 +1239,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
spin_lock(&sky2->tx_lock);
while (sky2->tx_cons != done) {
struct ring_info *re = sky2->tx_ring + sky2->tx_cons;
struct tx_ring_info *re = sky2->tx_ring + sky2->tx_cons;
struct sk_buff *skb;
/* Check for partial status */
@ -1248,15 +1248,17 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
goto out;
skb = re->skb;
pci_unmap_single(sky2->hw->pdev, re->mapaddr,
pci_unmap_single(sky2->hw->pdev,
pci_unmap_addr(re, mapaddr),
skb_headlen(skb), PCI_DMA_TODEVICE);
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
struct ring_info *fre;
struct tx_ring_info *fre;
fre =
sky2->tx_ring + (sky2->tx_cons + i +
1) % TX_RING_SIZE;
pci_unmap_page(sky2->hw->pdev, fre->mapaddr,
pci_unmap_page(sky2->hw->pdev,
pci_unmap_addr(fre, mapaddr),
skb_shinfo(skb)->frags[i].size,
PCI_DMA_TODEVICE);
}

9
drivers/net/sky2.h
View File

@ -1777,10 +1777,15 @@ struct sky2_status_le {
u8 opcode;
} __attribute((packed));
struct tx_ring_info {
struct sk_buff *skb;
DECLARE_PCI_UNMAP_ADDR(mapaddr);
u16 idx;
};
struct ring_info {
struct sk_buff *skb;
dma_addr_t mapaddr;
u16 idx;
};
struct sky2_port {
@ -1790,7 +1795,7 @@ struct sky2_port {
u32 msg_enable;
spinlock_t tx_lock ____cacheline_aligned_in_smp;
struct ring_info *tx_ring;
struct tx_ring_info *tx_ring;
struct sky2_tx_le *tx_le;
u16 tx_cons; /* next le to check */
u16 tx_prod; /* next le to use */