[PATCH] bcm43xx: add DMA rx poll workaround to DMA4
Also add the Poll RX DMA Memory workaround to the DMA4 (xmitstatus) path. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -624,25 +624,28 @@ err_destroy_tx0:
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static u16 generate_cookie(struct bcm43xx_dmaring *ring,
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int slot)
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{
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u16 cookie = 0x0000;
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u16 cookie = 0xF000;
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/* Use the upper 4 bits of the cookie as
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* DMA controller ID and store the slot number
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* in the lower 12 bits
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* in the lower 12 bits.
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* Note that the cookie must never be 0, as this
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* is a special value used in RX path.
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*/
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switch (ring->mmio_base) {
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default:
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assert(0);
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case BCM43xx_MMIO_DMA1_BASE:
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cookie = 0xA000;
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break;
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case BCM43xx_MMIO_DMA2_BASE:
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cookie = 0x1000;
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cookie = 0xB000;
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break;
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case BCM43xx_MMIO_DMA3_BASE:
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cookie = 0x2000;
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cookie = 0xC000;
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break;
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case BCM43xx_MMIO_DMA4_BASE:
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cookie = 0x3000;
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cookie = 0xD000;
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break;
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}
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assert(((u16)slot & 0xF000) == 0x0000);
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@ -660,16 +663,16 @@ struct bcm43xx_dmaring * parse_cookie(struct bcm43xx_private *bcm,
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struct bcm43xx_dmaring *ring = NULL;
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switch (cookie & 0xF000) {
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case 0x0000:
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case 0xA000:
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ring = dma->tx_ring0;
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break;
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case 0x1000:
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case 0xB000:
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ring = dma->tx_ring1;
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break;
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case 0x2000:
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case 0xC000:
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ring = dma->tx_ring2;
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break;
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case 0x3000:
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case 0xD000:
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ring = dma->tx_ring3;
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break;
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default:
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@ -839,8 +842,18 @@ static void dma_rx(struct bcm43xx_dmaring *ring,
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/* We received an xmit status. */
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struct bcm43xx_hwxmitstatus *hw = (struct bcm43xx_hwxmitstatus *)skb->data;
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struct bcm43xx_xmitstatus stat;
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int i = 0;
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stat.cookie = le16_to_cpu(hw->cookie);
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while (stat.cookie == 0) {
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if (unlikely(++i >= 10000)) {
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assert(0);
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break;
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}
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udelay(2);
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barrier();
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stat.cookie = le16_to_cpu(hw->cookie);
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}
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stat.flags = hw->flags;
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stat.cnt1 = hw->cnt1;
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stat.cnt2 = hw->cnt2;
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