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Commit 565197dd authored by Matan Barak's avatar Matan Barak Committed by Doug Ledford
Browse files

IB/core: Extend ib_uverbs_create_cq 



ib_uverbs_ex_create_cq follows the extension verbs
mechanism. New features (for example, CQ creation flags
field which is added in a downstream patch) could used
via user-space libraries without breaking the ABI.

Signed-off-by: default avatarMatan Barak <matanb@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent b9926b92

drivers/infiniband/core/uverbs.h

+1 −0
Original line number Diff line number Diff line
@@ -259,5 +259,6 @@ IB_UVERBS_DECLARE_CMD(close_xrcd); 
IB_UVERBS_DECLARE_EX_CMD(create_flow);

IB_UVERBS_DECLARE_EX_CMD(destroy_flow);

IB_UVERBS_DECLARE_EX_CMD(query_device);

IB_UVERBS_DECLARE_EX_CMD(create_cq);



#endif /* UVERBS_H */

drivers/infiniband/core/uverbs_cmd.c

+135 −35
Original line number Diff line number Diff line
@@ -1330,41 +1330,37 @@ ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 
	return in_len;

}



ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,

			    const char __user *buf, int in_len,

			    int out_len)

static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,

				       struct ib_udata *ucore,

				       struct ib_udata *uhw,

				       struct ib_uverbs_ex_create_cq *cmd,

				       size_t cmd_sz,

				       int (*cb)(struct ib_uverbs_file *file,

						 struct ib_ucq_object *obj,

						 struct ib_uverbs_ex_create_cq_resp *resp,

						 struct ib_udata *udata,

						 void *context),

				       void *context)

{

	struct ib_uverbs_create_cq      cmd;

	struct ib_uverbs_create_cq_resp resp;

	struct ib_udata                 udata;

	struct ib_ucq_object           *obj;

	struct ib_uverbs_event_file    *ev_file = NULL;

	struct ib_cq                   *cq;

	int                             ret;

	struct ib_uverbs_ex_create_cq_resp resp;

	struct ib_cq_init_attr attr = {};



	if (out_len < sizeof resp)

		return -ENOSPC;



	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);



	if (cmd.comp_vector >= file->device->num_comp_vectors)

		return -EINVAL;

	if (cmd->comp_vector >= file->device->num_comp_vectors)

		return ERR_PTR(-EINVAL);



	obj = kmalloc(sizeof *obj, GFP_KERNEL);

	if (!obj)

		return -ENOMEM;

		return ERR_PTR(-ENOMEM);



	init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);

	init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);

	down_write(&obj->uobject.mutex);



	if (cmd.comp_channel >= 0) {

		ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);

	if (cmd->comp_channel >= 0) {

		ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);

		if (!ev_file) {

			ret = -EINVAL;

			goto err;
@@ -1377,10 +1373,14 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 
	INIT_LIST_HEAD(&obj->comp_list);

	INIT_LIST_HEAD(&obj->async_list);



	attr.cqe = cmd.cqe;

	attr.comp_vector = cmd.comp_vector;

	attr.cqe = cmd->cqe;

	attr.comp_vector = cmd->comp_vector;



	if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))

		attr.flags = cmd->flags;



	cq = file->device->ib_dev->create_cq(file->device->ib_dev, &attr,

					     file->ucontext, &udata);

					     file->ucontext, uhw);

	if (IS_ERR(cq)) {

		ret = PTR_ERR(cq);

		goto err_file;
@@ -1399,14 +1399,15 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 
		goto err_free;



	memset(&resp, 0, sizeof resp);

	resp.cq_handle = obj->uobject.id;

	resp.cqe       = cq->cqe;

	resp.base.cq_handle = obj->uobject.id;

	resp.base.cqe       = cq->cqe;



	if (copy_to_user((void __user *) (unsigned long) cmd.response,

			 &resp, sizeof resp)) {

		ret = -EFAULT;

		goto err_copy;

	}

	resp.response_length = offsetof(typeof(resp), response_length) +

		sizeof(resp.response_length);



	ret = cb(file, obj, &resp, ucore, context);

	if (ret)

		goto err_cb;



	mutex_lock(&file->mutex);

	list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
@@ -1416,9 +1417,9 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 


	up_write(&obj->uobject.mutex);



	return in_len;

	return obj;



err_copy:

err_cb:

	idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);



err_free:
@@ -1430,7 +1431,106 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 


err:

	put_uobj_write(&obj->uobject);

	return ret;



	return ERR_PTR(ret);

}



static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,

				  struct ib_ucq_object *obj,

				  struct ib_uverbs_ex_create_cq_resp *resp,

				  struct ib_udata *ucore, void *context)

{

	if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))

		return -EFAULT;



	return 0;

}



ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,

			    const char __user *buf, int in_len,

			    int out_len)

{

	struct ib_uverbs_create_cq      cmd;

	struct ib_uverbs_ex_create_cq	cmd_ex;

	struct ib_uverbs_create_cq_resp resp;

	struct ib_udata                 ucore;

	struct ib_udata                 uhw;

	struct ib_ucq_object           *obj;



	if (out_len < sizeof(resp))

		return -ENOSPC;



	if (copy_from_user(&cmd, buf, sizeof(cmd)))

		return -EFAULT;



	INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd), sizeof(resp));



	INIT_UDATA(&uhw, buf + sizeof(cmd),

		   (unsigned long)cmd.response + sizeof(resp),

		   in_len - sizeof(cmd), out_len - sizeof(resp));



	memset(&cmd_ex, 0, sizeof(cmd_ex));

	cmd_ex.user_handle = cmd.user_handle;

	cmd_ex.cqe = cmd.cqe;

	cmd_ex.comp_vector = cmd.comp_vector;

	cmd_ex.comp_channel = cmd.comp_channel;



	obj = create_cq(file, &ucore, &uhw, &cmd_ex,

			offsetof(typeof(cmd_ex), comp_channel) +

			sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,

			NULL);



	if (IS_ERR(obj))

		return PTR_ERR(obj);



	return in_len;

}



static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,

				     struct ib_ucq_object *obj,

				     struct ib_uverbs_ex_create_cq_resp *resp,

				     struct ib_udata *ucore, void *context)

{

	if (ib_copy_to_udata(ucore, resp, resp->response_length))

		return -EFAULT;



	return 0;

}



int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,

			   struct ib_udata *ucore,

			   struct ib_udata *uhw)

{

	struct ib_uverbs_ex_create_cq_resp resp;

	struct ib_uverbs_ex_create_cq  cmd;

	struct ib_ucq_object           *obj;

	int err;



	if (ucore->inlen < sizeof(cmd))

		return -EINVAL;



	err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));

	if (err)

		return err;



	if (cmd.comp_mask)

		return -EINVAL;



	if (cmd.reserved)

		return -EINVAL;



	if (ucore->outlen < (offsetof(typeof(resp), response_length) +

			     sizeof(resp.response_length)))

		return -ENOSPC;



	obj = create_cq(file, ucore, uhw, &cmd,

			min(ucore->inlen, sizeof(cmd)),

			ib_uverbs_ex_create_cq_cb, NULL);



	if (IS_ERR(obj))

		return PTR_ERR(obj);



	return 0;

}



ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,

drivers/infiniband/core/uverbs_main.c

+1 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file, 
	[IB_USER_VERBS_EX_CMD_CREATE_FLOW]	= ib_uverbs_ex_create_flow,

	[IB_USER_VERBS_EX_CMD_DESTROY_FLOW]	= ib_uverbs_ex_destroy_flow,

	[IB_USER_VERBS_EX_CMD_QUERY_DEVICE]	= ib_uverbs_ex_query_device,

	[IB_USER_VERBS_EX_CMD_CREATE_CQ]	= ib_uverbs_ex_create_cq,

};



static void ib_uverbs_add_one(struct ib_device *device);

include/uapi/rdma/ib_user_verbs.h

+17 −0
Original line number Diff line number Diff line
@@ -91,6 +91,7 @@ enum { 


enum {

	IB_USER_VERBS_EX_CMD_QUERY_DEVICE = IB_USER_VERBS_CMD_QUERY_DEVICE,

	IB_USER_VERBS_EX_CMD_CREATE_CQ = IB_USER_VERBS_CMD_CREATE_CQ,

	IB_USER_VERBS_EX_CMD_CREATE_FLOW = IB_USER_VERBS_CMD_THRESHOLD,

	IB_USER_VERBS_EX_CMD_DESTROY_FLOW,

};
@@ -353,11 +354,27 @@ struct ib_uverbs_create_cq { 
	__u64 driver_data[0];

};



struct ib_uverbs_ex_create_cq {

	__u64 user_handle;

	__u32 cqe;

	__u32 comp_vector;

	__s32 comp_channel;

	__u32 comp_mask;

	__u32 flags;

	__u32 reserved;

};



struct ib_uverbs_create_cq_resp {

	__u32 cq_handle;

	__u32 cqe;

};



struct ib_uverbs_ex_create_cq_resp {

	struct ib_uverbs_create_cq_resp base;

	__u32 comp_mask;

	__u32 response_length;

};



struct ib_uverbs_resize_cq {

	__u64 response;

	__u32 cq_handle;