diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2009-11-13 13:03:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-15 22:14:50 -0800 |
| commit | 4361935afe3abc3e5a93006b99197fac1fabbd50 (patch) | |
| tree | 88becadbc88f1f0800b224cd597a940caaccbdde | |
| parent | 411da6407e778bf946911df08bb5afc505422f31 (diff) | |
tg3: Consider rx_std_prod_idx a hw mailbox
This patch changes how the code uses the rx_std_prod_idx member. In the
following patch, the code will be changed so that it will act just like
a hardware mailbox. This patch prepares the code so that memory barriers
can be more easily inserted.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/tg3.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 59a715a2562..beda9bf0767 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -4537,6 +4537,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) { struct tg3 *tp = tnapi->tp; u32 work_mask, rx_std_posted = 0; + u32 std_prod_idx, jmb_prod_idx; u32 sw_idx = tnapi->rx_rcb_ptr; u16 hw_idx; int received; @@ -4550,6 +4551,8 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) rmb(); work_mask = 0; received = 0; + std_prod_idx = tpr->rx_std_prod_idx; + jmb_prod_idx = tpr->rx_jmb_prod_idx; while (sw_idx != hw_idx && budget > 0) { struct ring_info *ri; struct tg3_rx_buffer_desc *desc = &tnapi->rx_rcb[sw_idx]; @@ -4564,13 +4567,13 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) ri = &tpr->rx_std_buffers[desc_idx]; dma_addr = pci_unmap_addr(ri, mapping); skb = ri->skb; - post_ptr = &tpr->rx_std_prod_idx; + post_ptr = &std_prod_idx; rx_std_posted++; } else if (opaque_key == RXD_OPAQUE_RING_JUMBO) { ri = &tpr->rx_jmb_buffers[desc_idx]; dma_addr = pci_unmap_addr(ri, mapping); skb = ri->skb; - post_ptr = &tpr->rx_jmb_prod_idx; + post_ptr = &jmb_prod_idx; } else goto next_pkt_nopost; @@ -4687,14 +4690,14 @@ next_pkt_nopost: /* Refill RX ring(s). */ if (work_mask & RXD_OPAQUE_RING_STD) { - sw_idx = tpr->rx_std_prod_idx % TG3_RX_RING_SIZE; + tpr->rx_std_prod_idx = std_prod_idx % TG3_RX_RING_SIZE; tw32_rx_mbox(MAILBOX_RCV_STD_PROD_IDX + TG3_64BIT_REG_LOW, - sw_idx); + tpr->rx_std_prod_idx); } if (work_mask & RXD_OPAQUE_RING_JUMBO) { - sw_idx = tpr->rx_jmb_prod_idx % TG3_RX_JUMBO_RING_SIZE; + tpr->rx_jmb_prod_idx = jmb_prod_idx % TG3_RX_JUMBO_RING_SIZE; tw32_rx_mbox(MAILBOX_RCV_JUMBO_PROD_IDX + TG3_64BIT_REG_LOW, - sw_idx); + tpr->rx_jmb_prod_idx); } mmiowb(); |