From: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
To: rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 2/3] RDMA/cxgb4: Add module option to tweak delayed ack.
Date: Wed, 23 Jun 2010 10:01:01 -0500 [thread overview]
Message-ID: <20100623150101.22155.58769.stgit@build.ogc.int> (raw)
In-Reply-To: <20100623150055.22155.17833.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
---
drivers/infiniband/hw/cxgb4/cm.c | 10 +++++++++-
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 8c9b483..fae6080 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 fc706bd..dc193c2 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_ */
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2010-06-23 15:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-23 15:00 [PATCH 1/3] RDMA/cxgb4: derive smac_idx from port viid Steve Wise
[not found] ` <20100623150055.22155.17833.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
2010-06-23 15:01 ` Steve Wise [this message]
2010-06-23 15:01 ` [PATCH 3/3] RDMA/cxgb4: Obtain RDMA QID ranges from LLD/FW Steve Wise
2010-06-23 15:07 ` [PATCH 1/3] RDMA/cxgb4: derive smac_idx from port viid Steve Wise
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100623150101.22155.58769.stgit@build.ogc.int \
--to=swise-7bpotxp6k4+p2yhjcf5u+vpxobypeauw@public.gmane.org \
--cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox