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authorMichael S. Tsirkin <mst@dev.mellanox.co.il>2007-05-03 13:48:47 +0300
committerRoland Dreier <rolandd@cisco.com>2007-05-06 21:18:11 -0700
commitf4fd0b224d60044d2da5ca02f8f2b5150c1d8731 (patch)
tree9bc6c08bde26e6b7d5c51ebd48fc26357d6ae9c5 /include/rdma
parent154257f3626ea6dd96781fac0896c3f27fe2b0a1 (diff)
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IB: Add CQ comp_vector support
Add a num_comp_vectors member to struct ib_device and extend ib_create_cq() to pass in a comp_vector parameter -- this parallels the userspace libibverbs API. Update all hardware drivers to set num_comp_vectors to 1 and have all ULPs pass 0 for the comp_vector value. Pass the value of num_comp_vectors to userspace rather than hard-coding a value of 1. We want multiple CQ event vector support (via MSI-X or similar for adapters that can generate multiple interrupts), but it's not clear how many vectors we want, or how we want to deal with policy issues such as how to decide which vector to use or how to set up interrupt affinity. This patch is useful for experimenting, since no core changes will be necessary when updating a driver to support multiple vectors, and we know that we want to make at least these changes anyway. Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 765589f4d16..17cc309d03e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -912,6 +912,8 @@ struct ib_device {
u32 flags;
+ int num_comp_vectors;
+
struct iw_cm_verbs *iwcm;
int (*query_device)(struct ib_device *device,
@@ -978,6 +980,7 @@ struct ib_device {
struct ib_recv_wr *recv_wr,
struct ib_recv_wr **bad_recv_wr);
struct ib_cq * (*create_cq)(struct ib_device *device, int cqe,
+ int comp_vector,
struct ib_ucontext *context,
struct ib_udata *udata);
int (*destroy_cq)(struct ib_cq *cq);
@@ -1358,13 +1361,15 @@ static inline int ib_post_recv(struct ib_qp *qp,
* @cq_context: Context associated with the CQ returned to the user via
* the associated completion and event handlers.
* @cqe: The minimum size of the CQ.
+ * @comp_vector - Completion vector used to signal completion events.
+ * Must be >= 0 and < context->num_comp_vectors.
*
* Users can examine the cq structure to determine the actual CQ size.
*/
struct ib_cq *ib_create_cq(struct ib_device *device,
ib_comp_handler comp_handler,
void (*event_handler)(struct ib_event *, void *),
- void *cq_context, int cqe);
+ void *cq_context, int cqe, int comp_vector);
/**
* ib_resize_cq - Modifies the capacity of the CQ.