drivers/gpu/drm/i915/i915_gem_gtt.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/i915_gem_gtt.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/i915_gem_gtt.h
Extension
.h
Size
1640 bytes
Lines
58
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

#ifndef __I915_GEM_GTT_H__
#define __I915_GEM_GTT_H__

#include <linux/io-mapping.h>
#include <linux/types.h>

#include <drm/drm_mm.h>

#include "gt/intel_gtt.h"
#include "i915_scatterlist.h"

struct drm_i915_gem_object;
struct i915_address_space;
struct i915_gem_ww_ctx;

#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */

int __must_check i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
					    struct sg_table *pages);
void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
			       struct sg_table *pages);

int i915_gem_gtt_reserve(struct i915_address_space *vm,
			 struct i915_gem_ww_ctx *ww,
			 struct drm_mm_node *node,
			 u64 size, u64 offset, unsigned long color,
			 unsigned int flags);

int i915_gem_gtt_insert(struct i915_address_space *vm,
			struct i915_gem_ww_ctx *ww,
			struct drm_mm_node *node,
			u64 size, u64 alignment, unsigned long color,
			u64 start, u64 end, unsigned int flags);

/* Flags used by pin/bind&friends. */
#define PIN_NOEVICT		BIT_ULL(0)
#define PIN_NOSEARCH		BIT_ULL(1)
#define PIN_NONBLOCK		BIT_ULL(2)
#define PIN_MAPPABLE		BIT_ULL(3)
#define PIN_ZONE_4G		BIT_ULL(4)
#define PIN_HIGH		BIT_ULL(5)
#define PIN_OFFSET_BIAS		BIT_ULL(6)
#define PIN_OFFSET_FIXED	BIT_ULL(7)
#define PIN_OFFSET_GUARD	BIT_ULL(8)
#define PIN_VALIDATE		BIT_ULL(9) /* validate placement only, no need to call unpin() */

#define PIN_GLOBAL		BIT_ULL(10) /* I915_VMA_GLOBAL_BIND */
#define PIN_USER		BIT_ULL(11) /* I915_VMA_LOCAL_BIND */

#define PIN_OFFSET_MASK		I915_GTT_PAGE_MASK

#endif

Annotation

Implementation Notes