IB/mthca: make IB_SEND_FENCE work
Fence bit must be set in the doorbell, not only in WQE
Signed-off-by: Michael S. Tsirkin <[EMAIL PROTECTED]>
diff --git a/drivers/infiniband/hw/mthca/mthca_doorbell.h
b/drivers/infiniband/hw/mthca/mthca_doorbell.h
index dd9a44d..e5f0ad6 100644
--- a/drivers/infiniband/hw/mthca/mthca_doorbell.h
+++ b/drivers/infiniband/hw/mthca/mthca_doorbell.h
@@ -42,6 +42,10 @@ #define MTHCA_RECEIVE_DOORBELL 0x18
#define MTHCA_CQ_DOORBELL 0x20
#define MTHCA_EQ_DOORBELL 0x28
+enum {
+ MTHCA_SEND_DOORBELL_FENCE = 1 << 5
+};
+
#if BITS_PER_LONG == 64
/*
* Assume that we can just write a 64-bit doorbell atomically. s390
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c
b/drivers/infiniband/hw/mthca/mthca_qp.c
index cd8b672..6efba4a 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -1502,7 +1502,7 @@ int mthca_tavor_post_send(struct ib_qp *
int i;
int size;
int size0 = 0;
- u32 f0 = 0;
+ u32 f0 = unlikely(wr->send_flags & IB_SEND_FENCE) ?
MTHCA_SEND_DOORBELL_FENCE : 0;
int ind;
u8 op0 = 0;
@@ -1843,7 +1843,7 @@ int mthca_arbel_post_send(struct ib_qp *
int i;
int size;
int size0 = 0;
- u32 f0 = 0;
+ u32 f0 = unlikely(wr->send_flags & IB_SEND_FENCE) ?
MTHCA_SEND_DOORBELL_FENCE : 0;
int ind;
u8 op0 = 0;
@@ -1864,6 +1864,7 @@ int mthca_arbel_post_send(struct ib_qp *
qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB;
size0 = 0;
+ f0 = unlikely(wr->send_flags & IB_SEND_FENCE) ?
MTHCA_SEND_DOORBELL_FENCE : 0;
/*
* Make sure that descriptors are written before
--
MST
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