diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2010-06-23 15:46:49 +0000 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-07-21 10:53:52 -0700 |
| commit | ba6d39256bed87a0e8ee1770b5f7638bb3e0cfe4 (patch) | |
| tree | 5cf7c80ff6a363a08763c1e03526355535a2efe0 /drivers/infiniband/hw | |
| parent | 85963e4cbcf11c00b1d27ea0e0fcab8cb3d7a69b (diff) | |
| download | lwn-ba6d39256bed87a0e8ee1770b5f7638bb3e0cfe4.tar.gz lwn-ba6d39256bed87a0e8ee1770b5f7638bb3e0cfe4.zip | |
RDMA/cxgb4: Add module option to tweak delayed ack
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/cm.c | 10 | ||||
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/t4fw_ri_api.h | 10 |
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 4185c3b0635b..e7b08dca740a 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -61,6 +61,10 @@ static char *states[] = { NULL, }; +static int dack_mode; +module_param(dack_mode, int, 0644); +MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)"); + int c4iw_max_read_depth = 8; module_param(c4iw_max_read_depth, int, 0644); MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)"); @@ -474,6 +478,7 @@ static int send_connect(struct c4iw_ep *ep) cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx); wscale = compute_wscale(rcv_win); opt0 = KEEP_ALIVE(1) | + DELACK(1) | WND_SCALE(wscale) | MSS_IDX(mtu_idx) | L2T_IDX(ep->l2t->idx) | @@ -845,7 +850,9 @@ static int update_rx_credits(struct c4iw_ep *ep, u32 credits) INIT_TP_WR(req, ep->hwtid); OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); - req->credit_dack = cpu_to_be32(credits); + req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) | + F_RX_DACK_CHANGE | + V_RX_DACK_MODE(dack_mode)); set_wr_txq(skb, CPL_PRIORITY_ACK, ep->txq_idx); c4iw_ofld_send(&ep->com.dev->rdev, skb); return credits; @@ -1264,6 +1271,7 @@ static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb, cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx); wscale = compute_wscale(rcv_win); opt0 = KEEP_ALIVE(1) | + DELACK(1) | WND_SCALE(wscale) | MSS_IDX(mtu_idx) | L2T_IDX(ep->l2t->idx) | diff --git a/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h b/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h index fc706bd07fae..dc193c292671 100644 --- a/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h +++ b/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h @@ -826,4 +826,14 @@ struct ulptx_idata { #define S_ULPTX_NSGE 0 #define M_ULPTX_NSGE 0xFFFF #define V_ULPTX_NSGE(x) ((x) << S_ULPTX_NSGE) + +#define S_RX_DACK_MODE 29 +#define M_RX_DACK_MODE 0x3 +#define V_RX_DACK_MODE(x) ((x) << S_RX_DACK_MODE) +#define G_RX_DACK_MODE(x) (((x) >> S_RX_DACK_MODE) & M_RX_DACK_MODE) + +#define S_RX_DACK_CHANGE 31 +#define V_RX_DACK_CHANGE(x) ((x) << S_RX_DACK_CHANGE) +#define F_RX_DACK_CHANGE V_RX_DACK_CHANGE(1U) + #endif /* _T4FW_RI_API_H_ */ |