linux/drivers/gpu/drm/i915/gem/i915_gem_shmem.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2014-2016 Intel Corporation
 */

#include <linux/pagevec.h>
#include <linux/shmem_fs.h>
#include <linux/swap.h>

#include <drm/drm_cache.h>

#include "gem/i915_gem_region.h"
#include "i915_drv.h"
#include "i915_gem_object.h"
#include "i915_gem_tiling.h"
#include "i915_gemfs.h"
#include "i915_scatterlist.h"
#include "i915_trace.h"

/*
 * Move folios to appropriate lru and release the batch, decrementing the
 * ref count of those folios.
 */
static void check_release_folio_batch(struct folio_batch *fbatch)
{ … }

void shmem_sg_free_table(struct sg_table *st, struct address_space *mapping,
			 bool dirty, bool backup)
{ … }

int shmem_sg_alloc_table(struct drm_i915_private *i915, struct sg_table *st,
			 size_t size, struct intel_memory_region *mr,
			 struct address_space *mapping,
			 unsigned int max_segment)
{ … }

static int shmem_get_pages(struct drm_i915_gem_object *obj)
{ … }

static int
shmem_truncate(struct drm_i915_gem_object *obj)
{ … }

void __shmem_writeback(size_t size, struct address_space *mapping)
{ … }

static void
shmem_writeback(struct drm_i915_gem_object *obj)
{ … }

static int shmem_shrink(struct drm_i915_gem_object *obj, unsigned int flags)
{ … }

void
__i915_gem_object_release_shmem(struct drm_i915_gem_object *obj,
				struct sg_table *pages,
				bool needs_clflush)
{ … }

void i915_gem_object_put_pages_shmem(struct drm_i915_gem_object *obj, struct sg_table *pages)
{ … }

static void
shmem_put_pages(struct drm_i915_gem_object *obj, struct sg_table *pages)
{ … }

static int
shmem_pwrite(struct drm_i915_gem_object *obj,
	     const struct drm_i915_gem_pwrite *arg)
{ … }

static int
shmem_pread(struct drm_i915_gem_object *obj,
	    const struct drm_i915_gem_pread *arg)
{ … }

static void shmem_release(struct drm_i915_gem_object *obj)
{ … }

const struct drm_i915_gem_object_ops i915_gem_shmem_ops = …;

static int __create_shmem(struct drm_i915_private *i915,
			  struct drm_gem_object *obj,
			  resource_size_t size)
{ … }

static int shmem_object_init(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 drm_i915_gem_object *
i915_gem_object_create_shmem(struct drm_i915_private *i915,
			     resource_size_t size)
{ … }

/* Allocate a new GEM object and fill it with the supplied data */
struct drm_i915_gem_object *
i915_gem_object_create_shmem_from_data(struct drm_i915_private *i915,
				       const void *data, resource_size_t size)
{ … }

static int init_shmem(struct intel_memory_region *mem)
{ … }

static int release_shmem(struct intel_memory_region *mem)
{ … }

static const struct intel_memory_region_ops shmem_region_ops = …;

struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915,
						 u16 type, u16 instance)
{ … }

bool i915_gem_object_is_shmem(const struct drm_i915_gem_object *obj)
{ … }