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Message-Id: <200707091526.31709.fenkes@de.ibm.com>
Date: Mon, 9 Jul 2007 15:26:31 +0200
From: Joachim Fenkes <fenkes@...ibm.com>
To: "LinuxPPC-Dev" <linuxppc-dev@...abs.org>,
LKML <linux-kernel@...r.kernel.org>,
"OF-General" <general@...ts.openfabrics.org>,
Roland Dreier <rolandd@...co.com>
Cc: "Hoang-Nam Nguyen" <hnguyen@...ibm.com>,
Christoph Raisch <raisch@...ibm.com>,
Stefan Roscher <stefan.roscher@...ibm.com>
Subject: [PATCH 05/13] IB/ehca: Support UD low latency QPs
From: Stefan Roscher <stefan.roscher@...ibm.com>
Signed-off-by: Joachim Fenkes <fenkes@...ibm.com>
---
drivers/infiniband/hw/ehca/ehca_qp.c | 84 +++++++++++++++++++++++-----------
1 files changed, 57 insertions(+), 27 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 9486a44..ffd1ce9 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -275,6 +275,11 @@ static inline void queue2resp(struct ipzu_queue_resp *resp,
resp->toggle_state = queue->toggle_state;
}
+static inline int ll_qp_msg_size(int nr_sge)
+{
+ return 128 << nr_sge;
+}
+
/*
* init_qp_queue initializes/constructs r/squeue and registers queue pages.
*/
@@ -363,8 +368,6 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata, int is_srq)
{
- static int da_rc_msg_size[] = { 128, 256, 512, 1024, 2048, 4096 };
- static int da_ud_sq_msg_size[]={ 128, 384, 896, 1920, 3968 };
struct ehca_qp *my_qp;
struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
@@ -396,6 +399,7 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
}
qp_type &= 0x1F;
+ init_attr->qp_type &= 0x1F;
/* handle SRQ base QPs */
if (init_attr->srq) {
@@ -435,23 +439,49 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
return ERR_PTR(-EINVAL);
}
- if (is_llqp && (qp_type != IB_QPT_RC && qp_type != IB_QPT_UD)) {
- ehca_err(pd->device, "unsupported LL QP Type=%x", qp_type);
- return ERR_PTR(-EINVAL);
- } else if (is_llqp && qp_type == IB_QPT_RC &&
- (init_attr->cap.max_send_wr > 255 ||
- init_attr->cap.max_recv_wr > 255 )) {
- ehca_err(pd->device, "Invalid Number of max_sq_wr=%x "
- "or max_rq_wr=%x for RC LLQP",
- init_attr->cap.max_send_wr,
- init_attr->cap.max_recv_wr);
- return ERR_PTR(-EINVAL);
- } else if (is_llqp && qp_type == IB_QPT_UD &&
- init_attr->cap.max_send_wr > 255) {
- ehca_err(pd->device,
- "Invalid Number of max_send_wr=%x for UD QP_TYPE=%x",
- init_attr->cap.max_send_wr, qp_type);
- return ERR_PTR(-EINVAL);
+ if (is_llqp) {
+ switch (qp_type) {
+ case IB_QPT_RC:
+ if ((init_attr->cap.max_send_wr > 255) ||
+ (init_attr->cap.max_recv_wr > 255)) {
+ ehca_err(pd->device,
+ "Invalid Number of max_sq_wr=%x "
+ "or max_rq_wr=%x for RC LLQP",
+ init_attr->cap.max_send_wr,
+ init_attr->cap.max_recv_wr);
+ return ERR_PTR(-EINVAL);
+ }
+ break;
+ case IB_QPT_UD:
+ if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
+ ehca_err(pd->device, "UD LLQP not supported "
+ "by this adapter");
+ return ERR_PTR(-ENOSYS);
+ }
+ if (!(init_attr->cap.max_send_sge <= 5
+ && init_attr->cap.max_send_sge >= 1
+ && init_attr->cap.max_recv_sge <= 5
+ && init_attr->cap.max_recv_sge >= 1)) {
+ ehca_err(pd->device,
+ "Invalid Number of max_send_sge=%x "
+ "or max_recv_sge=%x for UD LLQP",
+ init_attr->cap.max_send_sge,
+ init_attr->cap.max_recv_sge);
+ return ERR_PTR(-EINVAL);
+ } else if (init_attr->cap.max_send_wr > 255) {
+ ehca_err(pd->device,
+ "Invalid Number of "
+ "ax_send_wr=%x for UD QP_TYPE=%x",
+ init_attr->cap.max_send_wr, qp_type);
+ return ERR_PTR(-EINVAL);
+ }
+ break;
+ default:
+ ehca_err(pd->device, "unsupported LL QP Type=%x",
+ qp_type);
+ return ERR_PTR(-EINVAL);
+ break;
+ }
}
if (pd->uobject && udata)
@@ -509,7 +539,7 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
/* UD_AV CIRCUMVENTION */
max_send_sge = init_attr->cap.max_send_sge;
max_recv_sge = init_attr->cap.max_recv_sge;
- if (parms.servicetype == ST_UD) {
+ if (parms.servicetype == ST_UD && !is_llqp) {
max_send_sge += 2;
max_recv_sge += 2;
}
@@ -547,8 +577,8 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
rwqe_size = offsetof(struct ehca_wqe, u.nud.sg_list[
(parms.act_nr_recv_sges)]);
} else { /* for LLQP we need to use msg size, not wqe size */
- swqe_size = da_rc_msg_size[max_send_sge];
- rwqe_size = da_rc_msg_size[max_recv_sge];
+ swqe_size = ll_qp_msg_size(max_send_sge);
+ rwqe_size = ll_qp_msg_size(max_recv_sge);
parms.act_nr_send_sges = 1;
parms.act_nr_recv_sges = 1;
}
@@ -563,15 +593,15 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd,
case IB_QPT_UD:
case IB_QPT_GSI:
case IB_QPT_SMI:
- /* UD circumvention */
- parms.act_nr_recv_sges -= 2;
- parms.act_nr_send_sges -= 2;
if (is_llqp) {
- swqe_size = da_ud_sq_msg_size[max_send_sge];
- rwqe_size = da_rc_msg_size[max_recv_sge];
+ swqe_size = ll_qp_msg_size(parms.act_nr_send_sges);
+ rwqe_size = ll_qp_msg_size(parms.act_nr_recv_sges);
parms.act_nr_send_sges = 1;
parms.act_nr_recv_sges = 1;
} else {
+ /* UD circumvention */
+ parms.act_nr_send_sges -= 2;
+ parms.act_nr_recv_sges -= 2;
swqe_size = offsetof(struct ehca_wqe,
u.ud_av.sg_list[parms.act_nr_send_sges]);
rwqe_size = offsetof(struct ehca_wqe,
--
1.5.2
-
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