diff options
Diffstat (limited to 'drivers/gpu/drm/drm_gem_vram_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_gem_vram_helper.c | 80 |
1 files changed, 3 insertions, 77 deletions
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index 22b1fe9c03b8..b04cde4a60e7 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-or-later +#include <linux/export.h> #include <linux/iosys-map.h> #include <linux/module.h> @@ -88,11 +89,6 @@ static const struct drm_gem_object_funcs drm_gem_vram_object_funcs; * drmm_vram_helper_init() is a managed interface that installs a * clean-up handler to run during the DRM device's release. * - * For drawing or scanout operations, rsp. buffer objects have to be pinned - * in video RAM. Call drm_gem_vram_pin() with &DRM_GEM_VRAM_PL_FLAG_VRAM or - * &DRM_GEM_VRAM_PL_FLAG_SYSTEM to pin a buffer object in video RAM or system - * memory. Call drm_gem_vram_unpin() to release the pinned object afterwards. - * * A buffer object that is pinned in video RAM has a fixed address within that * memory region. Call drm_gem_vram_offset() to retrieve this value. Typically * it's used to program the hardware's scanout engine for framebuffers, set @@ -299,30 +295,7 @@ out: return 0; } -/** - * drm_gem_vram_pin() - Pins a GEM VRAM object in a region. - * @gbo: the GEM VRAM object - * @pl_flag: a bitmask of possible memory regions - * - * Pinning a buffer object ensures that it is not evicted from - * a memory region. A pinned buffer object has to be unpinned before - * it can be pinned to another region. If the pl_flag argument is 0, - * the buffer is pinned at its current location (video RAM or system - * memory). - * - * Small buffer objects, such as cursor images, can lead to memory - * fragmentation if they are pinned in the middle of video RAM. This - * is especially a problem on devices with only a small amount of - * video RAM. Fragmentation can prevent the primary framebuffer from - * fitting in, even though there's enough memory overall. The modifier - * DRM_GEM_VRAM_PL_FLAG_TOPDOWN marks the buffer object to be pinned - * at the high end of the memory region to avoid fragmentation. - * - * Returns: - * 0 on success, or - * a negative error code otherwise. - */ -int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag) +static int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag) { int ret; @@ -334,7 +307,6 @@ int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag) return ret; } -EXPORT_SYMBOL(drm_gem_vram_pin); static void drm_gem_vram_unpin_locked(struct drm_gem_vram_object *gbo) { @@ -343,15 +315,7 @@ static void drm_gem_vram_unpin_locked(struct drm_gem_vram_object *gbo) ttm_bo_unpin(&gbo->bo); } -/** - * drm_gem_vram_unpin() - Unpins a GEM VRAM object - * @gbo: the GEM VRAM object - * - * Returns: - * 0 on success, or - * a negative error code otherwise. - */ -int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo) +static int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo) { int ret; @@ -364,7 +328,6 @@ int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo) return 0; } -EXPORT_SYMBOL(drm_gem_vram_unpin); /** * drm_gem_vram_vmap() - Pins and maps a GEM VRAM object into kernel address @@ -690,41 +653,6 @@ EXPORT_SYMBOL(drm_gem_vram_plane_helper_cleanup_fb); */ /** - * drm_gem_vram_object_pin() - Implements &struct drm_gem_object_funcs.pin - * @gem: The GEM object to pin - * - * Returns: - * 0 on success, or - * a negative errno code otherwise. - */ -static int drm_gem_vram_object_pin(struct drm_gem_object *gem) -{ - struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem); - - /* - * Fbdev console emulation is the use case of these PRIME - * helpers. This may involve updating a hardware buffer from - * a shadow FB. We pin the buffer to it's current location - * (either video RAM or system memory) to prevent it from - * being relocated during the update operation. If you require - * the buffer to be pinned to VRAM, implement a callback that - * sets the flags accordingly. - */ - return drm_gem_vram_pin_locked(gbo, 0); -} - -/** - * drm_gem_vram_object_unpin() - Implements &struct drm_gem_object_funcs.unpin - * @gem: The GEM object to unpin - */ -static void drm_gem_vram_object_unpin(struct drm_gem_object *gem) -{ - struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem); - - drm_gem_vram_unpin_locked(gbo); -} - -/** * drm_gem_vram_object_vmap() - * Implements &struct drm_gem_object_funcs.vmap * @gem: The GEM object to map @@ -762,8 +690,6 @@ static void drm_gem_vram_object_vunmap(struct drm_gem_object *gem, static const struct drm_gem_object_funcs drm_gem_vram_object_funcs = { .free = drm_gem_vram_object_free, - .pin = drm_gem_vram_object_pin, - .unpin = drm_gem_vram_object_unpin, .vmap = drm_gem_vram_object_vmap, .vunmap = drm_gem_vram_object_vunmap, .mmap = drm_gem_ttm_mmap, |