drivers/gpu/drm/i915/intel_memory_region.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/intel_memory_region.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/intel_memory_region.h
Extension
.h
Size
3529 bytes
Lines
136
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct intel_memory_region_ops {
	int (*init)(struct intel_memory_region *mem);
	int (*release)(struct intel_memory_region *mem);

	int (*init_object)(struct intel_memory_region *mem,
			   struct drm_i915_gem_object *obj,
			   resource_size_t offset,
			   resource_size_t size,
			   resource_size_t page_size,
			   unsigned int flags);
};

struct intel_memory_region {
	struct drm_i915_private *i915;

	const struct intel_memory_region_ops *ops;

	struct io_mapping iomap;
	struct resource region;

	struct resource io;
	resource_size_t min_page_size;
	resource_size_t total;

	u16 type;
	u16 instance;
	enum intel_region_id id;
	char name[16];
	char uabi_name[20];
	bool private; /* not for userspace */

	struct {
		struct mutex lock; /* Protects access to objects */
		struct list_head list;
	} objects;

	bool is_range_manager;

	void *region_private;
};

bool intel_memory_type_is_local(enum intel_memory_type mem_type);

struct intel_memory_region *
intel_memory_region_lookup(struct drm_i915_private *i915,
			   u16 class, u16 instance);

struct intel_memory_region *
intel_memory_region_create(struct drm_i915_private *i915,
			   resource_size_t start,
			   resource_size_t size,
			   resource_size_t min_page_size,
			   resource_size_t io_start,
			   resource_size_t io_size,
			   u16 type,
			   u16 instance,
			   const struct intel_memory_region_ops *ops);

void intel_memory_region_destroy(struct intel_memory_region *mem);

int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
void intel_memory_regions_driver_release(struct drm_i915_private *i915);
struct intel_memory_region *
intel_memory_region_by_type(struct drm_i915_private *i915,
			    enum intel_memory_type mem_type);
const char *intel_memory_type_str(enum intel_memory_type type);

__printf(2, 3) void
intel_memory_region_set_name(struct intel_memory_region *mem,
			     const char *fmt, ...);

int intel_memory_region_reserve(struct intel_memory_region *mem,
				resource_size_t offset,
				resource_size_t size);

void intel_memory_region_debug(struct intel_memory_region *mr,
			       struct drm_printer *printer);

void intel_memory_region_avail(struct intel_memory_region *mr,
			       u64 *avail, u64 *visible_avail);

struct intel_memory_region *
i915_gem_ttm_system_setup(struct drm_i915_private *i915,
			  u16 type, u16 instance);
struct intel_memory_region *
i915_gem_shmem_setup(struct drm_i915_private *i915,
		     u16 type, u16 instance);

#endif

Annotation

Implementation Notes