From 12eef41f8b72b6e11e36b48c78849c17e49781c8 Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Sat, 1 Jul 2006 04:36:10 -0700 Subject: [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 Signed-off-by: Bryan O'Sullivan Cc: "Michael S. Tsirkin" Cc: Roland Dreier Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/infiniband/hw/ipath/ipath_keys.c | 50 ++++++++++++++++++-------------- 1 file changed, 28 insertions(+), 22 deletions(-) (limited to 'drivers/infiniband/hw/ipath/ipath_keys.c') diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c index e9d5d7e983bb..46773c673a1a 100644 --- a/drivers/infiniband/hw/ipath/ipath_keys.c +++ b/drivers/infiniband/hw/ipath/ipath_keys.c @@ -121,6 +121,7 @@ int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge, struct ib_sge *sge, int acc) { struct ipath_mregion *mr; + unsigned n, m; size_t off; int ret; @@ -152,20 +153,22 @@ int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge, } off += mr->offset; - isge->mr = mr; - isge->m = 0; - isge->n = 0; - while (off >= mr->map[isge->m]->segs[isge->n].length) { - off -= mr->map[isge->m]->segs[isge->n].length; - isge->n++; - if (isge->n >= IPATH_SEGSZ) { - isge->m++; - isge->n = 0; + m = 0; + n = 0; + while (off >= mr->map[m]->segs[n].length) { + off -= mr->map[m]->segs[n].length; + n++; + if (n >= IPATH_SEGSZ) { + m++; + n = 0; } } - isge->vaddr = mr->map[isge->m]->segs[isge->n].vaddr + off; - isge->length = mr->map[isge->m]->segs[isge->n].length - off; + isge->mr = mr; + isge->vaddr = mr->map[m]->segs[n].vaddr + off; + isge->length = mr->map[m]->segs[n].length - off; isge->sge_length = sge->length; + isge->m = m; + isge->n = n; ret = 1; @@ -190,6 +193,7 @@ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss, struct ipath_lkey_table *rkt = &dev->lk_table; struct ipath_sge *sge = &ss->sge; struct ipath_mregion *mr; + unsigned n, m; size_t off; int ret; @@ -207,20 +211,22 @@ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss, } off += mr->offset; - sge->mr = mr; - sge->m = 0; - sge->n = 0; - while (off >= mr->map[sge->m]->segs[sge->n].length) { - off -= mr->map[sge->m]->segs[sge->n].length; - sge->n++; - if (sge->n >= IPATH_SEGSZ) { - sge->m++; - sge->n = 0; + m = 0; + n = 0; + while (off >= mr->map[m]->segs[n].length) { + off -= mr->map[m]->segs[n].length; + n++; + if (n >= IPATH_SEGSZ) { + m++; + n = 0; } } - sge->vaddr = mr->map[sge->m]->segs[sge->n].vaddr + off; - sge->length = mr->map[sge->m]->segs[sge->n].length - off; + sge->mr = mr; + sge->vaddr = mr->map[m]->segs[n].vaddr + off; + sge->length = mr->map[m]->segs[n].length - off; sge->sge_length = len; + sge->m = m; + sge->n = n; ss->sg_list = NULL; ss->num_sge = 1; -- cgit v1.2.2