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Commit 2afc5e1b authored by Yishai Hadas's avatar Yishai Hadas Committed by Jason Gunthorpe
Browse files

IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD 



Introduce MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD and its initial
implementation.

This object is from type class FD and will be used to read DEVX
async events.

Signed-off-by: default avatarYishai Hadas <yishaih@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 69ea0582

drivers/infiniband/hw/mlx5/devx.c

+95 −0
Original line number Diff line number Diff line
@@ -33,6 +33,17 @@ struct devx_async_data { 
	struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;

};



struct devx_async_event_file {

	struct ib_uobject uobj;

	/* Head of events that are subscribed to this FD */

	struct list_head subscribed_events_list;

	spinlock_t lock;

	wait_queue_head_t poll_wait;

	struct list_head event_list;

	struct mlx5_ib_dev *dev;

	u8 omit_data:1;

};



#define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)

struct devx_obj {

	struct mlx5_core_dev	*mdev;
@@ -1365,6 +1376,37 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)( 
	return 0;

}



static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(

	struct uverbs_attr_bundle *attrs)

{

	struct ib_uobject *uobj = uverbs_attr_get_uobject(

		attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);

	struct devx_async_event_file *ev_file;

	struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(

		&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);

	struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);

	u32 flags;

	int err;



	err = uverbs_get_flags32(&flags, attrs,

		MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,

		MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);



	if (err)

		return err;



	ev_file = container_of(uobj, struct devx_async_event_file,

			       uobj);

	spin_lock_init(&ev_file->lock);

	INIT_LIST_HEAD(&ev_file->event_list);

	init_waitqueue_head(&ev_file->poll_wait);

	if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)

		ev_file->omit_data = 1;

	INIT_LIST_HEAD(&ev_file->subscribed_events_list);

	ev_file->dev = dev;

	return 0;

}



static void devx_query_callback(int status, struct mlx5_async_work *context)

{

	struct devx_async_data *async_data =
@@ -1719,6 +1761,32 @@ static const struct file_operations devx_async_cmd_event_fops = { 
	.llseek	 = no_llseek,

};



static ssize_t devx_async_event_read(struct file *filp, char __user *buf,

				     size_t count, loff_t *pos)

{

	return -EINVAL;

}



static __poll_t devx_async_event_poll(struct file *filp,

				      struct poll_table_struct *wait)

{

	return 0;

}



static int devx_async_event_close(struct inode *inode, struct file *filp)

{

	uverbs_close_fd(filp);

	return 0;

}



static const struct file_operations devx_async_event_fops = {

	.owner	 = THIS_MODULE,

	.read	 = devx_async_event_read,

	.poll    = devx_async_event_poll,

	.release = devx_async_event_close,

	.llseek	 = no_llseek,

};



static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,

						   enum rdma_remove_reason why)

{
@@ -1738,6 +1806,12 @@ static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj, 
	return 0;

};



static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj,

					    enum rdma_remove_reason why)

{

	return 0;

};



DECLARE_UVERBS_NAMED_METHOD(

	MLX5_IB_METHOD_DEVX_UMEM_REG,

	UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
@@ -1903,6 +1977,24 @@ DECLARE_UVERBS_NAMED_OBJECT( 
			     O_RDONLY),

	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));



DECLARE_UVERBS_NAMED_METHOD(

	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,

	UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,

			MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,

			UVERBS_ACCESS_NEW,

			UA_MANDATORY),

	UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,

			enum mlx5_ib_uapi_devx_create_event_channel_flags,

			UA_MANDATORY));



DECLARE_UVERBS_NAMED_OBJECT(

	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,

	UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),

			     devx_hot_unplug_async_event_file,

			     &devx_async_event_fops, "[devx_async_event]",

			     O_RDONLY),

	&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));



static bool devx_is_supported(struct ib_device *device)

{

	struct mlx5_ib_dev *dev = to_mdev(device);
@@ -1923,5 +2015,8 @@ const struct uapi_definition mlx5_ib_devx_defs[] = { 
	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(

		MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,

		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),

	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(

		MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,

		UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),

	{},

};

include/uapi/rdma/mlx5_user_ioctl_cmds.h

+10 −0
Original line number Diff line number Diff line
@@ -127,16 +127,26 @@ enum mlx5_ib_devx_async_cmd_fd_alloc_attrs { 
	MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),

};



enum mlx5_ib_devx_async_event_fd_alloc_attrs {

	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),

	MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,

};



enum mlx5_ib_devx_async_cmd_fd_methods {

	MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),

};



enum mlx5_ib_devx_async_event_fd_methods {

	MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),

};



enum mlx5_ib_objects {

	MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),

	MLX5_IB_OBJECT_DEVX_OBJ,

	MLX5_IB_OBJECT_DEVX_UMEM,

	MLX5_IB_OBJECT_FLOW_MATCHER,

	MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,

	MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,

};



enum mlx5_ib_flow_matcher_create_attrs {

include/uapi/rdma/mlx5_user_ioctl_verbs.h

+4 −0
Original line number Diff line number Diff line
@@ -63,5 +63,9 @@ enum mlx5_ib_uapi_dm_type { 
	MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM,

};



enum mlx5_ib_uapi_devx_create_event_channel_flags {

	MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA = 1 << 0,

};



#endif