Add support to mthca for lockless SRQ
Signed-off-by: Eli Cohen <[EMAIL PROTECTED]>
---
Index: ofa_kernel-1.2.5/drivers/infiniband/hw/mthca/mthca_srq.c
===================================================================
--- ofa_kernel-1.2.5.orig/drivers/infiniband/hw/mthca/mthca_srq.c
2007-10-10 15:18:40.000000000 +0200
+++ ofa_kernel-1.2.5/drivers/infiniband/hw/mthca/mthca_srq.c 2007-10-10
15:24:05.000000000 +0200
@@ -394,6 +394,9 @@ int mthca_modify_srq(struct ib_srq *ibsr
return -EINVAL;
}
+ if (attr_mask & IB_SRQ_LOCKNESS)
+ srq->use_lock = !!attr->use_lock;
+
return 0;
}
@@ -473,7 +476,8 @@ void mthca_free_srq_wqe(struct mthca_srq
ind = wqe_addr >> srq->wqe_shift;
- spin_lock(&srq->lock);
+ if (srq->use_lock)
+ spin_lock(&srq->lock);
if (likely(srq->first_free >= 0))
*wqe_to_link(get_wqe(srq, srq->last_free)) = ind;
@@ -483,7 +487,8 @@ void mthca_free_srq_wqe(struct mthca_srq
*wqe_to_link(get_wqe(srq, ind)) = -1;
srq->last_free = ind;
- spin_unlock(&srq->lock);
+ if (srq->use_lock)
+ spin_unlock(&srq->lock);
}
int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
@@ -502,7 +507,8 @@ int mthca_tavor_post_srq_recv(struct ib_
void *wqe;
void *prev_wqe;
- spin_lock_irqsave(&srq->lock, flags);
+ if (srq->use_lock)
+ spin_lock_irqsave(&srq->lock, flags);
first_ind = srq->first_free;
@@ -609,7 +615,9 @@ int mthca_tavor_post_srq_recv(struct ib_
*/
mmiowb();
- spin_unlock_irqrestore(&srq->lock, flags);
+ if (srq->use_lock)
+ spin_unlock_irqrestore(&srq->lock, flags);
+
return err;
}
@@ -626,7 +634,8 @@ int mthca_arbel_post_srq_recv(struct ib_
int i;
void *wqe;
- spin_lock_irqsave(&srq->lock, flags);
+ if (srq->use_lock)
+ spin_lock_irqsave(&srq->lock, flags);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
ind = srq->first_free;
@@ -692,7 +701,9 @@ int mthca_arbel_post_srq_recv(struct ib_
*srq->db = cpu_to_be32(srq->counter);
}
- spin_unlock_irqrestore(&srq->lock, flags);
+ if (srq->use_lock)
+ spin_unlock_irqrestore(&srq->lock, flags);
+
return err;
}
Index: ofa_kernel-1.2.5/drivers/infiniband/hw/mthca/mthca_provider.h
===================================================================
--- ofa_kernel-1.2.5.orig/drivers/infiniband/hw/mthca/mthca_provider.h
2007-10-10 15:10:22.000000000 +0200
+++ ofa_kernel-1.2.5/drivers/infiniband/hw/mthca/mthca_provider.h
2007-10-10 15:24:05.000000000 +0200
@@ -222,6 +222,7 @@ struct mthca_cq {
struct mthca_srq {
struct ib_srq ibsrq;
spinlock_t lock;
+ int use_lock;
int refcount;
int srqn;
int max;
_______________________________________________
general mailing list
[email protected]
http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general
To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
