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authorDotan Barak <dotanb@mellanox.co.il>2006-02-13 16:31:57 -0800
committerRoland Dreier <rolandd@cisco.com>2006-03-20 10:08:14 -0800
commit8bdb0e8632e0f5061bd18b6934346cb609490135 (patch)
treebaa94a9ad7c97f4c025452ffbba2b7f6d8cc0af2
parent7ccc9a24e01258a31ee2b964215e4ddddd2a02c4 (diff)
IB/uverbs: Support for query SRQ from userspace
Add support to uverbs to handle querying userspace SRQs (shared receive queues), including adding an ABI for marshalling requests and responses. The kernel midlayer already has the underlying ib_query_srq() function. Signed-off-by: Dotan Barak <dotanb@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
-rw-r--r--drivers/infiniband/core/uverbs.h1
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c44
-rw-r--r--drivers/infiniband/core/uverbs_main.c1
-rw-r--r--include/rdma/ib_user_verbs.h15
4 files changed, 61 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
index 89c798eb574..3372d67ff13 100644
--- a/drivers/infiniband/core/uverbs.h
+++ b/drivers/infiniband/core/uverbs.h
@@ -195,6 +195,7 @@ IB_UVERBS_DECLARE_CMD(attach_mcast);
IB_UVERBS_DECLARE_CMD(detach_mcast);
IB_UVERBS_DECLARE_CMD(create_srq);
IB_UVERBS_DECLARE_CMD(modify_srq);
+IB_UVERBS_DECLARE_CMD(query_srq);
IB_UVERBS_DECLARE_CMD(destroy_srq);
#endif /* UVERBS_H */
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 4cbef8c0663..38a66fbef36 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -2,6 +2,7 @@
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 PathScale, Inc. All rights reserved.
+ * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -1923,6 +1924,49 @@ out:
return ret ? ret : in_len;
}
+ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
+ const char __user *buf,
+ int in_len, int out_len)
+{
+ struct ib_uverbs_query_srq cmd;
+ struct ib_uverbs_query_srq_resp resp;
+ struct ib_srq_attr attr;
+ struct ib_srq *srq;
+ int ret;
+
+ if (out_len < sizeof resp)
+ return -ENOSPC;
+
+ if (copy_from_user(&cmd, buf, sizeof cmd))
+ return -EFAULT;
+
+ mutex_lock(&ib_uverbs_idr_mutex);
+
+ srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
+ if (srq && srq->uobject->context == file->ucontext)
+ ret = ib_query_srq(srq, &attr);
+ else
+ ret = -EINVAL;
+
+ mutex_unlock(&ib_uverbs_idr_mutex);
+
+ if (ret)
+ goto out;
+
+ memset(&resp, 0, sizeof resp);
+
+ resp.max_wr = attr.max_wr;
+ resp.max_sge = attr.max_sge;
+ resp.srq_limit = attr.srq_limit;
+
+ if (copy_to_user((void __user *) (unsigned long) cmd.response,
+ &resp, sizeof resp))
+ ret = -EFAULT;
+
+out:
+ return ret ? ret : in_len;
+}
+
ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 91e4750fa31..ff092a0a94d 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -108,6 +108,7 @@ static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
[IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
[IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
[IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
+ [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
[IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
};
diff --git a/include/rdma/ib_user_verbs.h b/include/rdma/ib_user_verbs.h
index 58662c34a3d..0edd3a6fe8f 100644
--- a/include/rdma/ib_user_verbs.h
+++ b/include/rdma/ib_user_verbs.h
@@ -2,6 +2,7 @@
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 PathScale, Inc. All rights reserved.
+ * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -613,6 +614,20 @@ struct ib_uverbs_modify_srq {
__u64 driver_data[0];
};
+struct ib_uverbs_query_srq {
+ __u64 response;
+ __u32 srq_handle;
+ __u32 reserved;
+ __u64 driver_data[0];
+};
+
+struct ib_uverbs_query_srq_resp {
+ __u32 max_wr;
+ __u32 max_sge;
+ __u32 srq_limit;
+ __u32 reserved;
+};
+
struct ib_uverbs_destroy_srq {
__u64 response;
__u32 srq_handle;