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mwl8k: use pci_unmap_addr{,set}() to keep track of unmap addresses on rx

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Instead of reading back the unmap address from the receive
descriptor when doing receive processing, use DECLARE_PCI_UNMAP_ADDR
and pci_unmap_addr{,set}() to keep track of these addresses.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Lennert Buytenhek 2009-10-22 20:20:56 +02:00 committed by John W. Linville
parent eae74e6545
commit 788838ebe8
1 changed files with 29 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/net/wireless/mwl8k.c
View File

@ -97,7 +97,10 @@ struct mwl8k_rx_queue {
struct mwl8k_rx_desc *rxd;
dma_addr_t rxd_dma;
struct sk_buff **skb;
struct {
struct sk_buff *skb;
DECLARE_PCI_UNMAP_ADDR(dma)
} *buf;
};
struct mwl8k_tx_queue {
@ -791,14 +794,14 @@ static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
}
memset(rxq->rxd, 0, size);
rxq->skb = kmalloc(MWL8K_RX_DESCS * sizeof(*rxq->skb), GFP_KERNEL);
if (rxq->skb == NULL) {
rxq->buf = kmalloc(MWL8K_RX_DESCS * sizeof(*rxq->buf), GFP_KERNEL);
if (rxq->buf == NULL) {
printk(KERN_ERR "%s: failed to alloc RX skbuff list\n",
wiphy_name(hw->wiphy));
pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
return -ENOMEM;
}
memset(rxq->skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->skb));
memset(rxq->buf, 0, MWL8K_RX_DESCS * sizeof(*rxq->buf));
for (i = 0; i < MWL8K_RX_DESCS; i++) {
struct mwl8k_rx_desc *rx_desc;
@ -824,6 +827,7 @@ static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
refilled = 0;
while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
struct sk_buff *skb;
dma_addr_t addr;
int rx;
skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
@ -835,12 +839,13 @@ static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
rx = rxq->tail;
rxq->tail = (rx + 1) % MWL8K_RX_DESCS;
rxq->rxd[rx].pkt_phys_addr =
cpu_to_le32(pci_map_single(priv->pdev, skb->data,
MWL8K_RX_MAXSZ, DMA_FROM_DEVICE));
addr = pci_map_single(priv->pdev, skb->data,
MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
rxq->rxd[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ);
rxq->skb[rx] = skb;
rxq->rxd[rx].pkt_phys_addr = cpu_to_le32(addr);
rxq->buf[rx].skb = skb;
pci_unmap_addr_set(&rxq->buf[rx], dma, addr);
wmb();
rxq->rxd[rx].rx_ctrl = 0;
@ -858,19 +863,19 @@ static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
int i;
for (i = 0; i < MWL8K_RX_DESCS; i++) {
if (rxq->skb[i] != NULL) {
unsigned long addr;
if (rxq->buf[i].skb != NULL) {
pci_unmap_single(priv->pdev,
pci_unmap_addr(&rxq->buf[i], dma),
MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
pci_unmap_addr_set(&rxq->buf[i], dma, 0);
addr = le32_to_cpu(rxq->rxd[i].pkt_phys_addr);
pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ,
PCI_DMA_FROMDEVICE);
kfree_skb(rxq->skb[i]);
rxq->skb[i] = NULL;
kfree_skb(rxq->buf[i].skb);
rxq->buf[i].skb = NULL;
}
}
kfree(rxq->skb);
rxq->skb = NULL;
kfree(rxq->buf);
rxq->buf = NULL;
pci_free_consistent(priv->pdev,
MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc),
@ -920,7 +925,6 @@ static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
struct mwl8k_rx_desc *rx_desc;
struct sk_buff *skb;
struct ieee80211_rx_status status;
unsigned long addr;
struct ieee80211_hdr *wh;
u16 rate_info;
@ -929,18 +933,19 @@ static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
break;
rmb();
skb = rxq->skb[rxq->head];
skb = rxq->buf[rxq->head].skb;
if (skb == NULL)
break;
rxq->skb[rxq->head] = NULL;
rxq->buf[rxq->head].skb = NULL;
pci_unmap_single(priv->pdev,
pci_unmap_addr(&rxq->buf[rxq->head], dma),
MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
pci_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
rxq->head = (rxq->head + 1) % MWL8K_RX_DESCS;
rxq->rxd_count--;
addr = le32_to_cpu(rx_desc->pkt_phys_addr);
pci_unmap_single(priv->pdev, addr,
MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
skb_put(skb, le16_to_cpu(rx_desc->pkt_len));
mwl8k_remove_dma_header(skb);