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drm: Remove the dma_alloc_coherent wrapper for internal usage

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Internally for "consistent" maps, we create a temporary struct
drm_dma_handle in order to use our own dma_alloc_coherent wrapper then
destroy the temporary wrap. Simplify our logic by removing the temporary
wrapper!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200202171635.4039044-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-02-02 17:16:32 +00:00
parent ea36ec8623
commit 8e4ff9b569
4 changed files with 15 additions and 36 deletions
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20
drivers/gpu/drm/drm_bufs.c
View File

@ -149,7 +149,6 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
{
struct drm_local_map *map;
struct drm_map_list *list;
drm_dma_handle_t *dmah;
unsigned long user_token;
int ret;
@ -324,14 +323,14 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
* As we're limiting the address to 2^32-1 (or less),
* casting it down to 32 bits is no problem, but we
* need to point to a 64bit variable first. */
dmah = drm_pci_alloc(dev, map->size, map->size);
if (!dmah) {
map->handle = dma_alloc_coherent(&dev->pdev->dev,
map->size,
&map->offset,
GFP_KERNEL);
if (!map->handle) {
kfree(map);
return -ENOMEM;
}
map->handle = dmah->vaddr;
map->offset = (unsigned long)dmah->busaddr;
kfree(dmah);
break;
default:
kfree(map);
@ -513,7 +512,6 @@ int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data,
int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
{
struct drm_map_list *r_list = NULL, *list_t;
drm_dma_handle_t dmah;
int found = 0;
struct drm_master *master;
@ -554,10 +552,10 @@ int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
case _DRM_SCATTER_GATHER:
break;
case _DRM_CONSISTENT:
dmah.vaddr = map->handle;
dmah.busaddr = map->offset;
dmah.size = map->size;
__drm_legacy_pci_free(dev, &dmah);
dma_free_coherent(&dev->pdev->dev,
map->size,
map->handle,
map->offset);
break;
}
kfree(map);

15
drivers/gpu/drm/drm_pci.c
View File

@ -78,18 +78,6 @@ drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t ali
EXPORT_SYMBOL(drm_pci_alloc);
/*
* Free a PCI consistent memory block without freeing its descriptor.
*
* This function is for internal use in the Linux-specific DRM core code.
*/
void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
{
if (dmah->vaddr)
dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
dmah->busaddr);
}
/**
* drm_pci_free - Free a PCI consistent memory block
* @dev: DRM device
@ -100,7 +88,8 @@ void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
*/
void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
{
__drm_legacy_pci_free(dev, dmah);
dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
dmah->busaddr);
kfree(dmah);
}

10
drivers/gpu/drm/drm_vm.c
View File

@ -269,8 +269,6 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
}
if (!found_maps) {
drm_dma_handle_t dmah;
switch (map->type) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
@ -284,10 +282,10 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
case _DRM_SCATTER_GATHER:
break;
case _DRM_CONSISTENT:
dmah.vaddr = map->handle;
dmah.busaddr = map->offset;
dmah.size = map->size;
__drm_legacy_pci_free(dev, &dmah);
dma_free_coherent(&dev->pdev->dev,
map->size,
map->handle,
map->offset);
break;
}
kfree(map);

6
include/drm/drm_legacy.h
View File

@ -194,17 +194,11 @@ void drm_legacy_idlelock_release(struct drm_lock_data *lock);
#ifdef CONFIG_PCI
void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
#else
static inline void __drm_legacy_pci_free(struct drm_device *dev,
drm_dma_handle_t *dmah)
{
}
static inline int drm_legacy_pci_init(struct drm_driver *driver,
struct pci_driver *pdriver)
{