diff options
| author | Dmitry Kravkov <dmitry@broadcom.com> | 2013-06-19 01:36:05 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-19 18:32:17 -0700 |
| commit | 75b2945988274078bccf4c0b84e90c77b4fcaf96 (patch) | |
| tree | 3dbae8169193509604a9e5cd1896fd7fa4ac3298 /drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h | |
| parent | 8f20aa575c0a69ccbdce325818f2b3878bfed61c (diff) | |
| download | linux-75b2945988274078bccf4c0b84e90c77b4fcaf96.tar.bz2 | |
bnx2x: replace mechanism to check for next available packet
Check next packet availability by validating that HW has finished CQE
placement. This saves latency of another dma transaction performed to update
SB indexes.
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h index a1a5cdca114c..c07a6d054cfe 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h @@ -59,6 +59,16 @@ extern int int_mode; (unsigned long long)(*y), x); \ } while (0) +#define BNX2X_PCI_FALLOC(x, y, size) \ + do { \ + x = dma_alloc_coherent(&bp->pdev->dev, size, y, GFP_KERNEL); \ + if (x == NULL) \ + goto alloc_mem_err; \ + memset((void *)x, 0xFFFFFFFF, size); \ + DP(NETIF_MSG_HW, "BNX2X_PCI_FALLOC: Physical %Lx Virtual %p\n",\ + (unsigned long long)(*y), x); \ + } while (0) + #define BNX2X_ALLOC(x, size) \ do { \ x = kzalloc(size, GFP_KERNEL); \ @@ -805,16 +815,18 @@ static inline bool bnx2x_has_tx_work(struct bnx2x_fastpath *fp) return false; } +#define BNX2X_IS_CQE_COMPLETED(cqe_fp) (cqe_fp->marker == 0x0) +#define BNX2X_SEED_CQE(cqe_fp) (cqe_fp->marker = 0xFFFFFFFF) static inline int bnx2x_has_rx_work(struct bnx2x_fastpath *fp) { - u16 rx_cons_sb; + u16 cons; + union eth_rx_cqe *cqe; + struct eth_fast_path_rx_cqe *cqe_fp; - /* Tell compiler that status block fields can change */ - barrier(); - rx_cons_sb = le16_to_cpu(*fp->rx_cons_sb); - if ((rx_cons_sb & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT) - rx_cons_sb++; - return (fp->rx_comp_cons != rx_cons_sb); + cons = RCQ_BD(fp->rx_comp_cons); + cqe = &fp->rx_comp_ring[cons]; + cqe_fp = &cqe->fast_path_cqe; + return BNX2X_IS_CQE_COMPLETED(cqe_fp); } /** |