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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: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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3 changed files with 109 additions and 0 deletions
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@ -33,6 +33,17 @@ struct devx_async_data {
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struct mlx5_ib_uapi_devx_async_cmd_hdr hdr;
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};
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struct devx_async_event_file {
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struct ib_uobject uobj;
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/* Head of events that are subscribed to this FD */
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struct list_head subscribed_events_list;
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spinlock_t lock;
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wait_queue_head_t poll_wait;
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struct list_head event_list;
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struct mlx5_ib_dev *dev;
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u8 omit_data:1;
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};
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#define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in)
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struct devx_obj {
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struct mlx5_core_dev *mdev;
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@ -1365,6 +1376,37 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC)(
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return 0;
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}
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static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC)(
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struct uverbs_attr_bundle *attrs)
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{
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struct ib_uobject *uobj = uverbs_attr_get_uobject(
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attrs, MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE);
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struct devx_async_event_file *ev_file;
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struct mlx5_ib_ucontext *c = rdma_udata_to_drv_context(
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&attrs->driver_udata, struct mlx5_ib_ucontext, ibucontext);
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struct mlx5_ib_dev *dev = to_mdev(c->ibucontext.device);
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u32 flags;
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int err;
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err = uverbs_get_flags32(&flags, attrs,
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MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
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MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA);
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if (err)
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return err;
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ev_file = container_of(uobj, struct devx_async_event_file,
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uobj);
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spin_lock_init(&ev_file->lock);
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INIT_LIST_HEAD(&ev_file->event_list);
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init_waitqueue_head(&ev_file->poll_wait);
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if (flags & MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA)
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ev_file->omit_data = 1;
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INIT_LIST_HEAD(&ev_file->subscribed_events_list);
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ev_file->dev = dev;
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return 0;
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}
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static void devx_query_callback(int status, struct mlx5_async_work *context)
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{
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struct devx_async_data *async_data =
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@ -1719,6 +1761,32 @@ static const struct file_operations devx_async_cmd_event_fops = {
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.llseek = no_llseek,
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};
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static ssize_t devx_async_event_read(struct file *filp, char __user *buf,
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size_t count, loff_t *pos)
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{
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return -EINVAL;
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}
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static __poll_t devx_async_event_poll(struct file *filp,
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struct poll_table_struct *wait)
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{
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return 0;
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}
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static int devx_async_event_close(struct inode *inode, struct file *filp)
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{
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uverbs_close_fd(filp);
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return 0;
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}
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static const struct file_operations devx_async_event_fops = {
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.owner = THIS_MODULE,
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.read = devx_async_event_read,
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.poll = devx_async_event_poll,
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.release = devx_async_event_close,
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.llseek = no_llseek,
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};
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static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
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enum rdma_remove_reason why)
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{
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@ -1738,6 +1806,12 @@ static int devx_hot_unplug_async_cmd_event_file(struct ib_uobject *uobj,
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return 0;
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};
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static int devx_hot_unplug_async_event_file(struct ib_uobject *uobj,
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enum rdma_remove_reason why)
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{
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return 0;
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};
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DECLARE_UVERBS_NAMED_METHOD(
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MLX5_IB_METHOD_DEVX_UMEM_REG,
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UVERBS_ATTR_IDR(MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE,
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@ -1903,6 +1977,24 @@ DECLARE_UVERBS_NAMED_OBJECT(
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O_RDONLY),
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&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC));
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DECLARE_UVERBS_NAMED_METHOD(
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MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC,
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UVERBS_ATTR_FD(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE,
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MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
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UVERBS_ACCESS_NEW,
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UA_MANDATORY),
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UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
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enum mlx5_ib_uapi_devx_create_event_channel_flags,
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UA_MANDATORY));
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DECLARE_UVERBS_NAMED_OBJECT(
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MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
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UVERBS_TYPE_ALLOC_FD(sizeof(struct devx_async_event_file),
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devx_hot_unplug_async_event_file,
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&devx_async_event_fops, "[devx_async_event]",
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O_RDONLY),
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&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC));
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static bool devx_is_supported(struct ib_device *device)
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{
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struct mlx5_ib_dev *dev = to_mdev(device);
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@ -1923,5 +2015,8 @@ const struct uapi_definition mlx5_ib_devx_defs[] = {
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UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
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MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
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UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
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UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
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MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
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UAPI_DEF_IS_OBJ_SUPPORTED(devx_is_supported)),
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{},
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};
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@ -127,16 +127,26 @@ enum mlx5_ib_devx_async_cmd_fd_alloc_attrs {
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MLX5_IB_ATTR_DEVX_ASYNC_CMD_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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};
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enum mlx5_ib_devx_async_event_fd_alloc_attrs {
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MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_ASYNC_EVENT_FD_ALLOC_FLAGS,
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};
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enum mlx5_ib_devx_async_cmd_fd_methods {
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MLX5_IB_METHOD_DEVX_ASYNC_CMD_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
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};
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enum mlx5_ib_devx_async_event_fd_methods {
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MLX5_IB_METHOD_DEVX_ASYNC_EVENT_FD_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
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};
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enum mlx5_ib_objects {
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MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_OBJECT_DEVX_OBJ,
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MLX5_IB_OBJECT_DEVX_UMEM,
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MLX5_IB_OBJECT_FLOW_MATCHER,
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MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD,
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MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
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};
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enum mlx5_ib_flow_matcher_create_attrs {
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@ -63,5 +63,9 @@ enum mlx5_ib_uapi_dm_type {
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MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM,
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};
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enum mlx5_ib_uapi_devx_create_event_channel_flags {
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MLX5_IB_UAPI_DEVX_CR_EV_CH_FLAGS_OMIT_DATA = 1 << 0,
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};
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#endif
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