diff options
Diffstat (limited to 'include/drm/drm_device.h')
| -rw-r--r-- | include/drm/drm_device.h | 82 |
1 files changed, 72 insertions, 10 deletions
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index c91f87b5242d..5af49c5c3778 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -5,6 +5,7 @@ #include <linux/kref.h> #include <linux/mutex.h> #include <linux/idr.h> +#include <linux/sched.h> #include <drm/drm_mode_config.h> @@ -21,6 +22,28 @@ struct inode; struct pci_dev; struct pci_controller; +/* + * Recovery methods for wedged device in order of less to more side-effects. + * To be used with drm_dev_wedged_event() as recovery @method. Callers can + * use any one, multiple (or'd) or none depending on their needs. + * + * Refer to "Device Wedging" chapter in Documentation/gpu/drm-uapi.rst for more + * details. + */ +#define DRM_WEDGE_RECOVERY_NONE BIT(0) /* optional telemetry collection */ +#define DRM_WEDGE_RECOVERY_REBIND BIT(1) /* unbind + bind driver */ +#define DRM_WEDGE_RECOVERY_BUS_RESET BIT(2) /* unbind + reset bus device + bind */ +#define DRM_WEDGE_RECOVERY_VENDOR BIT(3) /* vendor specific recovery method */ + +/** + * struct drm_wedge_task_info - information about the guilty task of a wedge dev + */ +struct drm_wedge_task_info { + /** @pid: pid of the task */ + pid_t pid; + /** @comm: command name of the task */ + char comm[TASK_COMM_LEN]; +}; /** * enum switch_power_state - power state of drm device @@ -57,6 +80,28 @@ struct drm_device { struct device *dev; /** + * @dma_dev: + * + * Device for DMA operations. Only required if the device @dev + * cannot perform DMA by itself. Should be NULL otherwise. Call + * drm_dev_dma_dev() to get the DMA device instead of using this + * field directly. Call drm_dev_set_dma_dev() to set this field. + * + * DRM devices are sometimes bound to virtual devices that cannot + * perform DMA by themselves. Drivers should set this field to the + * respective DMA controller. + * + * Devices on USB and other peripheral busses also cannot perform + * DMA by themselves. The @dma_dev field should point the bus + * controller that does DMA on behalve of such a device. Required + * for importing buffers via dma-buf. + * + * If set, the DRM core automatically releases the reference on the + * device. + */ + struct device *dma_dev; + + /** * @managed: * * Managed resources linked to the lifetime of this &drm_device as @@ -148,16 +193,6 @@ struct drm_device { char *unique; /** - * @struct_mutex: - * - * Lock for others (not &drm_minor.master and &drm_file.is_master) - * - * TODO: This lock used to be the BKL of the DRM subsystem. Move the - * lock into i915, which is the only remaining user. - */ - struct mutex struct_mutex; - - /** * @master_mutex: * * Lock for &drm_minor.master and &drm_file.is_master @@ -204,6 +239,14 @@ struct drm_device { struct list_head clientlist; /** + * @client_sysrq_list: + * + * Entry into list of devices registered for sysrq. Allows in-kernel + * clients on this device to handle sysrq keys. + */ + struct list_head client_sysrq_list; + + /** * @vblank_disable_immediate: * * If true, vblank interrupt will be disabled immediately when the @@ -319,4 +362,23 @@ struct drm_device { struct dentry *debugfs_root; }; +void drm_dev_set_dma_dev(struct drm_device *dev, struct device *dma_dev); + +/** + * drm_dev_dma_dev - returns the DMA device for a DRM device + * @dev: DRM device + * + * Returns the DMA device of the given DRM device. By default, this + * the DRM device's parent. See drm_dev_set_dma_dev(). + * + * Returns: + * A DMA-capable device for the DRM device. + */ +static inline struct device *drm_dev_dma_dev(struct drm_device *dev) +{ + if (dev->dma_dev) + return dev->dma_dev; + return dev->dev; +} + #endif |