提交 4361935a 编写于 作者: M Matt Carlson 提交者: David S. Miller

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: NMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 411da640
......@@ -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 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
/* 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();
......
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