6 files changed, 62 insertions, 8 deletions

diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
index f7eecbc6af6c..3207239819ce 100644
--- a/drivers/infiniband/core/uverbs.h
+++ b/drivers/infiniband/core/uverbs.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
  * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
  * Copyright (c) 2005 PathScale, Inc. All rights reserved.
@@ -178,6 +178,7 @@ IB_UVERBS_DECLARE_CMD(reg_mr);
 IB_UVERBS_DECLARE_CMD(dereg_mr);
 IB_UVERBS_DECLARE_CMD(create_comp_channel);
 IB_UVERBS_DECLARE_CMD(create_cq);
+IB_UVERBS_DECLARE_CMD(resize_cq);
 IB_UVERBS_DECLARE_CMD(poll_cq);
 IB_UVERBS_DECLARE_CMD(req_notify_cq);
 IB_UVERBS_DECLARE_CMD(destroy_cq);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 407b6284d7d5..be1cef1b3116 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
@@ -675,6 +675,46 @@ err:
         return ret;
 }
 
+ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
+                            const char __user *buf, int in_len,
+                            int out_len)
+{
+        struct ib_uverbs_resize_cq      cmd;
+        struct ib_uverbs_resize_cq_resp resp;
+        struct ib_udata                 udata;
+        struct ib_cq                    *cq;
+        int                             ret = -EINVAL;
+
+        if (copy_from_user(&cmd, buf, sizeof cmd))
+                return -EFAULT;
+
+        INIT_UDATA(&udata, buf + sizeof cmd,
+                   (unsigned long) cmd.response + sizeof resp,
+                   in_len - sizeof cmd, out_len - sizeof resp);
+
+        mutex_lock(&ib_uverbs_idr_mutex);
+
+        cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
+        if (!cq || cq->uobject->context != file->ucontext || !cq->device->resize_cq)
+                goto out;
+
+        ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
+        if (ret)
+                goto out;
+
+        memset(&resp, 0, sizeof resp);
+        resp.cqe = cq->cqe;
+
+        if (copy_to_user((void __user *) (unsigned long) cmd.response,
+                         &resp, sizeof resp))
+                ret = -EFAULT;
+
+out:
+        mutex_unlock(&ib_uverbs_idr_mutex);
+
+        return ret ? ret : in_len;
+}
+
 ssize_t ib_uverbs_poll_cq(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 903f85a4bc0c..099fe6cde68c 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
  * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
  * Copyright (c) 2005 PathScale, Inc. All rights reserved.
@@ -91,6 +91,7 @@ static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
         [IB_USER_VERBS_CMD_DEREG_MR]            = ib_uverbs_dereg_mr,
         [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
         [IB_USER_VERBS_CMD_CREATE_CQ]           = ib_uverbs_create_cq,
+        [IB_USER_VERBS_CMD_RESIZE_CQ]           = ib_uverbs_resize_cq,
         [IB_USER_VERBS_CMD_POLL_CQ]             = ib_uverbs_poll_cq,
         [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ]       = ib_uverbs_req_notify_cq,
         [IB_USER_VERBS_CMD_DESTROY_CQ]          = ib_uverbs_destroy_cq,
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index c857361be449..8e0ba16bcbdd 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -5,7 +5,7 @@
  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  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
@@ -326,7 +326,7 @@ int ib_resize_cq(struct ib_cq *cq,
                  int           cqe)
 {
         return cq->device->resize_cq ?
-                cq->device->resize_cq(cq, cqe) : -ENOSYS;
+                cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
 }
 EXPORT_SYMBOL(ib_resize_cq);
 
diff --git a/include/rdma/ib_user_verbs.h b/include/rdma/ib_user_verbs.h
index 5ff1490c08db..6ad1207e4235 100644
--- a/include/rdma/ib_user_verbs.h
+++ b/include/rdma/ib_user_verbs.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
@@ -265,6 +265,17 @@ struct ib_uverbs_create_cq_resp {
         __u32 cqe;
 };
 
+struct ib_uverbs_resize_cq {
+        __u64 response;
+        __u32 cq_handle;
+        __u32 cqe;
+        __u64 driver_data[0];
+};
+
+struct ib_uverbs_resize_cq_resp {
+        __u32 cqe;
+};
+
 struct ib_uverbs_poll_cq {
         __u64 response;
         __u32 cq_handle;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 22fc886b9695..38fa6c082eae 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -5,7 +5,7 @@
  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
- * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  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
@@ -880,7 +880,8 @@ struct ib_device {
                                                 struct ib_ucontext *context,
                                                 struct ib_udata *udata);
         int                        (*destroy_cq)(struct ib_cq *cq);
-        int                        (*resize_cq)(struct ib_cq *cq, int cqe);
+        int                        (*resize_cq)(struct ib_cq *cq, int cqe,
+                                                struct ib_udata *udata);
         int                        (*poll_cq)(struct ib_cq *cq, int num_entries,
                                               struct ib_wc *wc);
         int                        (*peek_cq)(struct ib_cq *cq, int wc_cnt);