diff options
| author | Ron Mercer <ron.mercer@qlogic.com> | 2009-02-23 13:42:16 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-25 10:50:01 +0300 |
| commit | 49f2186d36a88ae6f7dd8261aff2cf80409af28d (patch) | |
| tree | 150c5ae20128158903b3299aa0b30f4a58d2077a /drivers/net/qlge | |
| parent | 8587ea35ca6b4add4353b8a18b67d358aed0389e (diff) | |
| download | linux-49f2186d36a88ae6f7dd8261aff2cf80409af28d.tar.xz | |
qlge: Optimize rx buffer refill process.
RX Buffers are refilled in chunks of 16 at a time before notifying the
hardware with a register write. This can cause several writes to take
place in a given napi poll call. This change causes the write to take place
only once at the end of the call.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/qlge')
| -rw-r--r-- | drivers/net/qlge/qlge_main.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c index 16c056a62fc1..17198459918e 100644 --- a/drivers/net/qlge/qlge_main.c +++ b/drivers/net/qlge/qlge_main.c @@ -863,7 +863,8 @@ static void ql_write_cq_idx(struct rx_ring *rx_ring) /* Process (refill) a large buffer queue. */ static void ql_update_lbq(struct ql_adapter *qdev, struct rx_ring *rx_ring) { - int clean_idx = rx_ring->lbq_clean_idx; + u32 clean_idx = rx_ring->lbq_clean_idx; + u32 start_idx = clean_idx; struct bq_desc *lbq_desc; u64 map; int i; @@ -910,19 +911,23 @@ static void ql_update_lbq(struct ql_adapter *qdev, struct rx_ring *rx_ring) rx_ring->lbq_prod_idx += 16; if (rx_ring->lbq_prod_idx == rx_ring->lbq_len) rx_ring->lbq_prod_idx = 0; + rx_ring->lbq_free_cnt -= 16; + } + + if (start_idx != clean_idx) { QPRINTK(qdev, RX_STATUS, DEBUG, "lbq: updating prod idx = %d.\n", rx_ring->lbq_prod_idx); ql_write_db_reg(rx_ring->lbq_prod_idx, rx_ring->lbq_prod_idx_db_reg); - rx_ring->lbq_free_cnt -= 16; } } /* Process (refill) a small buffer queue. */ static void ql_update_sbq(struct ql_adapter *qdev, struct rx_ring *rx_ring) { - int clean_idx = rx_ring->sbq_clean_idx; + u32 clean_idx = rx_ring->sbq_clean_idx; + u32 start_idx = clean_idx; struct bq_desc *sbq_desc; u64 map; int i; @@ -972,13 +977,15 @@ static void ql_update_sbq(struct ql_adapter *qdev, struct rx_ring *rx_ring) rx_ring->sbq_prod_idx += 16; if (rx_ring->sbq_prod_idx == rx_ring->sbq_len) rx_ring->sbq_prod_idx = 0; + rx_ring->sbq_free_cnt -= 16; + } + + if (start_idx != clean_idx) { QPRINTK(qdev, RX_STATUS, DEBUG, "sbq: updating prod idx = %d.\n", rx_ring->sbq_prod_idx); ql_write_db_reg(rx_ring->sbq_prod_idx, rx_ring->sbq_prod_idx_db_reg); - - rx_ring->sbq_free_cnt -= 16; } } |