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Name	Size	Permission
bridge	[ DIR ]	drwxr-xr-x
i2c	[ DIR ]	drwxr-xr-x
ttm	[ DIR ]	drwxr-xr-x
amd_asic_type.h	1.66 KB	-rw-r--r--
ati_pcigart.h	731 B	-rw-r--r--
drmP.h	3.05 KB	-rw-r--r--
drm_agpsupport.h	3.44 KB	-rw-r--r--
drm_atomic.h	34.86 KB	-rw-r--r--
drm_atomic_helper.h	9.1 KB	-rw-r--r--
drm_atomic_state_helper.h	3.32 KB	-rw-r--r--
drm_atomic_uapi.h	2.17 KB	-rw-r--r--
drm_audio_component.h	3.67 KB	-rw-r--r--
drm_auth.h	3.53 KB	-rw-r--r--
drm_blend.h	2.35 KB	-rw-r--r--
drm_bridge.h	16.85 KB	-rw-r--r--
drm_cache.h	2.85 KB	-rw-r--r--
drm_client.h	4.5 KB	-rw-r--r--
drm_color_mgmt.h	3.18 KB	-rw-r--r--
drm_connector.h	51.59 KB	-rw-r--r--
drm_crtc.h	41.04 KB	-rw-r--r--
drm_crtc_helper.h	2.39 KB	-rw-r--r--
drm_damage_helper.h	3.97 KB	-rw-r--r--
drm_debugfs.h	3.41 KB	-rw-r--r--
drm_debugfs_crc.h	2.66 KB	-rw-r--r--
drm_device.h	8.35 KB	-rw-r--r--
drm_displayid.h	3.24 KB	-rw-r--r--
drm_dp_dual_mode_helper.h	4.43 KB	-rw-r--r--
drm_dp_helper.h	56.15 KB	-rw-r--r--
drm_dp_mst_helper.h	21.92 KB	-rw-r--r--
drm_drv.h	26.12 KB	-rw-r--r--
drm_dsc.h	16.21 KB	-rw-r--r--
drm_edid.h	15.75 KB	-rw-r--r--
drm_encoder.h	8.47 KB	-rw-r--r--
drm_encoder_slave.h	6.44 KB	-rw-r--r--
drm_fb_cma_helper.h	392 B	-rw-r--r--
drm_fb_helper.h	15.9 KB	-rw-r--r--
drm_file.h	10.67 KB	-rw-r--r--
drm_fixed.h	4.71 KB	-rw-r--r--
drm_flip_work.h	3.01 KB	-rw-r--r--
drm_format_helper.h	1.15 KB	-rw-r--r--
drm_fourcc.h	9.75 KB	-rw-r--r--
drm_framebuffer.h	9.56 KB	-rw-r--r--
drm_gem.h	12.06 KB	-rw-r--r--
drm_gem_cma_helper.h	4.46 KB	-rw-r--r--
drm_gem_framebuffer_helper.h	1.26 KB	-rw-r--r--
drm_gem_shmem_helper.h	5.08 KB	-rw-r--r--
drm_gem_vram_helper.h	3.73 KB	-rw-r--r--
drm_hashtab.h	3.01 KB	-rw-r--r--
drm_hdcp.h	8.55 KB	-rw-r--r--
drm_ioctl.h	6.23 KB	-rw-r--r--
drm_irq.h	1.29 KB	-rw-r--r--
drm_lease.h	1010 B	-rw-r--r--
drm_legacy.h	6.58 KB	-rw-r--r--
drm_mipi_dbi.h	4.36 KB	-rw-r--r--
drm_mipi_dsi.h	10.59 KB	-rw-r--r--
drm_mm.h	17.39 KB	-rw-r--r--
drm_mode_config.h	31.28 KB	-rw-r--r--
drm_mode_object.h	5.17 KB	-rw-r--r--
drm_modes.h	18.77 KB	-rw-r--r--
drm_modeset_helper.h	1.77 KB	-rw-r--r--
drm_modeset_helper_vtables.h	51.53 KB	-rw-r--r--
drm_modeset_lock.h	6.38 KB	-rw-r--r--
drm_of.h	3.37 KB	-rw-r--r--
drm_os_linux.h	2.04 KB	-rw-r--r--
drm_panel.h	5.16 KB	-rw-r--r--
drm_pci.h	2.23 KB	-rw-r--r--
drm_pciids.h	66.47 KB	-rw-r--r--
drm_plane.h	26.26 KB	-rw-r--r--
drm_plane_helper.h	1.75 KB	-rw-r--r--
drm_prime.h	3.86 KB	-rw-r--r--
drm_print.h	14.07 KB	-rw-r--r--
drm_probe_helper.h	848 B	-rw-r--r--
drm_property.h	11.49 KB	-rw-r--r--
drm_rect.h	5.61 KB	-rw-r--r--
drm_scdc_helper.h	4.34 KB	-rw-r--r--
drm_self_refresh_helper.h	594 B	-rw-r--r--
drm_simple_kms_helper.h	6.01 KB	-rw-r--r--
drm_syncobj.h	3.85 KB	-rw-r--r--
drm_sysfs.h	442 B	-rw-r--r--
drm_util.h	2.58 KB	-rw-r--r--
drm_utils.h	504 B	-rw-r--r--
drm_vblank.h	7.63 KB	-rw-r--r--
drm_vma_manager.h	8.14 KB	-rw-r--r--
drm_vram_mm_helper.h	2.86 KB	-rw-r--r--
drm_writeback.h	3.89 KB	-rw-r--r--
gma_drm.h	413 B	-rw-r--r--
gpu_scheduler.h	12.46 KB	-rw-r--r--
i915_component.h	1.76 KB	-rw-r--r--
i915_drm.h	3.77 KB	-rw-r--r--
i915_mei_hdcp_interface.h	4.91 KB	-rw-r--r--
i915_pciids.h	19.34 KB	-rw-r--r--
intel-gtt.h	996 B	-rw-r--r--
intel_lpe_audio.h	1.72 KB	-rw-r--r--
spsc_queue.h	3.06 KB	-rw-r--r--

Code Editor : drm_gem_shmem_helper.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __DRM_GEM_SHMEM_HELPER_H__
#define __DRM_GEM_SHMEM_HELPER_H__

#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/mutex.h>

#include <drm/drm_file.h>
#include <drm/drm_gem.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_prime.h>

struct dma_buf_attachment;
struct drm_mode_create_dumb;
struct drm_printer;
struct sg_table;

/**
 * struct drm_gem_shmem_object - GEM object backed by shmem
 */
struct drm_gem_shmem_object {
	/**
	 * @base: Base GEM object
	 */
	struct drm_gem_object base;

/**
	 * @pages_lock: Protects the page table and use count
	 */
	struct mutex pages_lock;

/**
	 * @pages: Page table
	 */
	struct page **pages;

/**
	 * @pages_use_count:
	 *
	 * Reference count on the pages table.
	 * The pages are put when the count reaches zero.
	 */
	unsigned int pages_use_count;

/**
	 * @madv: State for madvise
	 *
	 * 0 is active/inuse.
	 * A negative value is the object is purged.
	 * Positive values are driver specific and not used by the helpers.
	 */
	int madv;

/**
	 * @madv_list: List entry for madvise tracking
	 *
	 * Typically used by drivers to track purgeable objects
	 */
	struct list_head madv_list;

/**
	 * @pages_mark_dirty_on_put:
	 *
	 * Mark pages as dirty when they are put.
	 */
	unsigned int pages_mark_dirty_on_put    : 1;

/**
	 * @pages_mark_accessed_on_put:
	 *
	 * Mark pages as accessed when they are put.
	 */
	unsigned int pages_mark_accessed_on_put : 1;

/**
	 * @sgt: Scatter/gather table for imported PRIME buffers
	 */
	struct sg_table *sgt;

/**
	 * @vmap_lock: Protects the vmap address and use count
	 */
	struct mutex vmap_lock;

/**
	 * @vaddr: Kernel virtual address of the backing memory
	 */
	void *vaddr;

/**
	 * @vmap_use_count:
	 *
	 * Reference count on the virtual address.
	 * The address are un-mapped when the count reaches zero.
	 */
	unsigned int vmap_use_count;
};

#define to_drm_gem_shmem_obj(obj) \
	container_of(obj, struct drm_gem_shmem_object, base)

/**
 * DEFINE_DRM_GEM_SHMEM_FOPS() - Macro to generate file operations for shmem drivers
 * @name: name for the generated structure
 *
 * This macro autogenerates a suitable &struct file_operations for shmem based
 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
 * cannot be shared between drivers, because it contains a reference to the
 * current module using THIS_MODULE.
 *
 * Note that the declaration is already marked as static - if you need a
 * non-static version of this you're probably doing it wrong and will break the
 * THIS_MODULE reference by accident.
 */
#define DEFINE_DRM_GEM_SHMEM_FOPS(name) \
	static const struct file_operations name = {\
		.owner		= THIS_MODULE,\
		.open		= drm_open,\
		.release	= drm_release,\
		.unlocked_ioctl	= drm_ioctl,\
		.compat_ioctl	= drm_compat_ioctl,\
		.poll		= drm_poll,\
		.read		= drm_read,\
		.llseek		= noop_llseek,\
		.mmap		= drm_gem_shmem_mmap, \
	}

struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
void drm_gem_shmem_free_object(struct drm_gem_object *obj);

int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
int drm_gem_shmem_pin(struct drm_gem_object *obj);
void drm_gem_shmem_unpin(struct drm_gem_object *obj);
void *drm_gem_shmem_vmap(struct drm_gem_object *obj);
void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr);

int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv);

static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem)
{
	return (shmem->madv > 0) &&
		!shmem->vmap_use_count && shmem->sgt &&
		!shmem->base.dma_buf && !shmem->base.import_attach;
}

void drm_gem_shmem_purge_locked(struct drm_gem_object *obj);
bool drm_gem_shmem_purge(struct drm_gem_object *obj);

struct drm_gem_shmem_object *
drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
				 struct drm_device *dev, size_t size,
				 uint32_t *handle);
int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
			      struct drm_mode_create_dumb *args);

int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma);

extern const struct vm_operations_struct drm_gem_shmem_vm_ops;

void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
			      const struct drm_gem_object *obj);

struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj);
struct drm_gem_object *
drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
				    struct dma_buf_attachment *attach,
				    struct sg_table *sgt);

struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_object *obj);

/**
 * DRM_GEM_SHMEM_DRIVER_OPS - Default shmem GEM operations
 *
 * This macro provides a shortcut for setting the shmem GEM operations in
 * the &drm_driver structure.
 */
#define DRM_GEM_SHMEM_DRIVER_OPS \
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd, \
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle, \
	.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, \
	.gem_prime_mmap		= drm_gem_prime_mmap, \
	.dumb_create		= drm_gem_shmem_dumb_create

#endif /* __DRM_GEM_SHMEM_HELPER_H__ */

${this.title}

Code Editor : drm_gem_shmem_helper.h