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authorBryan O'Sullivan <bos@pathscale.com>2006-07-01 04:36:10 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-01 09:56:01 -0700
commit12eef41f8b72b6e11e36b48c78849c17e49781c8 (patch)
tree3a8bd77d77c7542e19d200d3abf25fc07f0d8f51 /drivers/infiniband/hw/ipath/ipath_uc.c
parentfba75200ad92892bf32d8d6f1443c6f1e4f48676 (diff)
[PATCH] IB/ipath: rC receive interrupt performance changes
This patch separates QP state used for sending and receiving RC packets so the processing in the receive interrupt handler can be done mostly without locks being held. ACK packets are now sent without requiring synchronization with the send tasklet. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Cc: "Michael S. Tsirkin" <mst@mellanox.co.il> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_uc.c')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_uc.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_uc.c b/drivers/infiniband/hw/ipath/ipath_uc.c
index 89b3e1a5e3e..10516842bb8 100644
--- a/drivers/infiniband/hw/ipath/ipath_uc.c
+++ b/drivers/infiniband/hw/ipath/ipath_uc.c
@@ -241,7 +241,6 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
u32 hdrsize;
u32 psn;
u32 pad;
- unsigned long flags;
struct ib_wc wc;
u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
struct ib_reth *reth;
@@ -279,8 +278,6 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
wc.imm_data = 0;
wc.wc_flags = 0;
- spin_lock_irqsave(&qp->r_rq.lock, flags);
-
/* Compare the PSN verses the expected PSN. */
if (unlikely(ipath_cmp24(psn, qp->r_psn) != 0)) {
/*
@@ -537,15 +534,11 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
default:
/* Drop packet for unknown opcodes. */
- spin_unlock_irqrestore(&qp->r_rq.lock, flags);
dev->n_pkt_drops++;
- goto bail;
+ goto done;
}
qp->r_psn++;
qp->r_state = opcode;
done:
- spin_unlock_irqrestore(&qp->r_rq.lock, flags);
-
-bail:
return;
}