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drm: Use the same mmap-range offset and size for GEM and TTM 

GEM defines DRM_FILE_PAGE_OFFSET_{START,SIZE} constants for the
mmap-able range of addresses. TTM can use them as well.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Thomas Zimmermann 2019-02-07 09:59:31 +01:00 committed by Alex Deucher
parent bed2dd8421
commit bf141a88b3
5 changed files with 15 additions and 22 deletions
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17
drivers/gpu/drm/drm_gem.c
View File

@ -72,23 +72,6 @@
* up at a later date, and as our interface with shmfs for memory allocation.
*/
/*
* We make up offsets for buffer objects so we can recognize them at
* mmap time.
*/
/* pgoff in mmap is an unsigned long, so we need to make sure that
* the faked up offset will fit
*/
#if BITS_PER_LONG == 64
#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
#else
#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
#endif
/**
* drm_gem_init - Initialize the GEM device fields
* @dev: drm_devic structure to initialize

4
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -1646,8 +1646,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
goto out_no_sys;
drm_vma_offset_manager_init(&bdev->vma_manager,
DRM_FILE_PAGE_OFFSET,
0x10000000);
DRM_FILE_PAGE_OFFSET_START,
DRM_FILE_PAGE_OFFSET_SIZE);
INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
INIT_LIST_HEAD(&bdev->ddestroy);
bdev->dev_mapping = mapping;

2
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@ -432,7 +432,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
struct ttm_buffer_object *bo;
int ret;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START))
return -EINVAL;
bo = ttm_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));

12
include/drm/drm_vma_manager.h
View File

@ -29,6 +29,18 @@
#include <linux/spinlock.h>
#include <linux/types.h>
/* We make up offsets for buffer objects so we can recognize them at
* mmap time. pgoff in mmap is an unsigned long, so we need to make sure
* that the faked up offset will fit
*/
#if BITS_PER_LONG == 64
#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
#else
#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
#endif
struct drm_file;
struct drm_vma_offset_file {

2
include/drm/ttm/ttm_bo_driver.h
View File

@ -49,8 +49,6 @@
#define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */
#define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */
#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
struct ttm_mem_type_manager;
struct ttm_mem_type_manager_func {