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authorMichael Buesch <mb@bu3sch.de>2006-06-03 20:20:42 -0400
committerJohn W. Linville <linville@tuxdriver.com>2006-06-05 15:28:56 -0400
commitea9a7719597e81a119a155178eabfc941eef11cc (patch)
treef55cdd1138d851544beef3c12f991821aaead2cf
parent672c6108a51bf559d19595d9f8193dfd81f0f752 (diff)
[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>
-rw-r--r--drivers/net/wireless/bcm43xx/bcm43xx_dma.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
index bbecba02e697..d0318e525ba7 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
@@ -624,25 +624,28 @@ err_destroy_tx0:
624static u16 generate_cookie(struct bcm43xx_dmaring *ring, 624static u16 generate_cookie(struct bcm43xx_dmaring *ring,
625 int slot) 625 int slot)
626{ 626{
627 u16 cookie = 0x0000; 627 u16 cookie = 0xF000;
628 628
629 /* Use the upper 4 bits of the cookie as 629 /* Use the upper 4 bits of the cookie as
630 * DMA controller ID and store the slot number 630 * DMA controller ID and store the slot number
631 * in the lower 12 bits 631 * in the lower 12 bits.
632 * Note that the cookie must never be 0, as this
633 * is a special value used in RX path.
632 */ 634 */
633 switch (ring->mmio_base) { 635 switch (ring->mmio_base) {
634 default: 636 default:
635 assert(0); 637 assert(0);
636 case BCM43xx_MMIO_DMA1_BASE: 638 case BCM43xx_MMIO_DMA1_BASE:
639 cookie = 0xA000;
637 break; 640 break;
638 case BCM43xx_MMIO_DMA2_BASE: 641 case BCM43xx_MMIO_DMA2_BASE:
639 cookie = 0x1000; 642 cookie = 0xB000;
640 break; 643 break;
641 case BCM43xx_MMIO_DMA3_BASE: 644 case BCM43xx_MMIO_DMA3_BASE:
642 cookie = 0x2000; 645 cookie = 0xC000;
643 break; 646 break;
644 case BCM43xx_MMIO_DMA4_BASE: 647 case BCM43xx_MMIO_DMA4_BASE:
645 cookie = 0x3000; 648 cookie = 0xD000;
646 break; 649 break;
647 } 650 }
648 assert(((u16)slot & 0xF000) == 0x0000); 651 assert(((u16)slot & 0xF000) == 0x0000);
@@ -660,16 +663,16 @@ struct bcm43xx_dmaring * parse_cookie(struct bcm43xx_private *bcm,
660 struct bcm43xx_dmaring *ring = NULL; 663 struct bcm43xx_dmaring *ring = NULL;
661 664
662 switch (cookie & 0xF000) { 665 switch (cookie & 0xF000) {
663 case 0x0000: 666 case 0xA000:
664 ring = dma->tx_ring0; 667 ring = dma->tx_ring0;
665 break; 668 break;
666 case 0x1000: 669 case 0xB000:
667 ring = dma->tx_ring1; 670 ring = dma->tx_ring1;
668 break; 671 break;
669 case 0x2000: 672 case 0xC000:
670 ring = dma->tx_ring2; 673 ring = dma->tx_ring2;
671 break; 674 break;
672 case 0x3000: 675 case 0xD000:
673 ring = dma->tx_ring3; 676 ring = dma->tx_ring3;
674 break; 677 break;
675 default: 678 default:
@@ -839,8 +842,18 @@ static void dma_rx(struct bcm43xx_dmaring *ring,
839 /* We received an xmit status. */ 842 /* We received an xmit status. */
840 struct bcm43xx_hwxmitstatus *hw = (struct bcm43xx_hwxmitstatus *)skb->data; 843 struct bcm43xx_hwxmitstatus *hw = (struct bcm43xx_hwxmitstatus *)skb->data;
841 struct bcm43xx_xmitstatus stat; 844 struct bcm43xx_xmitstatus stat;
845 int i = 0;
842 846
843 stat.cookie = le16_to_cpu(hw->cookie); 847 stat.cookie = le16_to_cpu(hw->cookie);
848 while (stat.cookie == 0) {
849 if (unlikely(++i >= 10000)) {
850 assert(0);
851 break;
852 }
853 udelay(2);
854 barrier();
855 stat.cookie = le16_to_cpu(hw->cookie);
856 }
844 stat.flags = hw->flags; 857 stat.flags = hw->flags;
845 stat.cnt1 = hw->cnt1; 858 stat.cnt1 = hw->cnt1;
846 stat.cnt2 = hw->cnt2; 859 stat.cnt2 = hw->cnt2;