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drm: update support for drm pci buffers 

The DRM needs to change the drm_pci interface for FreeBSD compatiblity,
this patch introduces the drm_dma_handle_t and uses it in the Linux code.

From: Tonnerre Lombard, Eric Anholt, and Sergey Vlasov
Signed-off-by: David Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2005-07-10 15:38:56 +10:00 committed by Dave Airlie
parent d59431bf96
commit 9c8da5ebbf
7 changed files with 78 additions and 39 deletions
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16
drivers/char/drm/drmP.h
View File

@ -527,6 +527,12 @@ typedef struct drm_sigdata {
drm_hw_lock_t *lock;
} drm_sigdata_t;
typedef struct drm_dma_handle {
dma_addr_t busaddr;
void *vaddr;
size_t size;
} drm_dma_handle_t;
/**
* Mappings list
*/
@ -978,12 +984,10 @@ extern int drm_ati_pcigart_cleanup(drm_device_t *dev,
unsigned long addr,
dma_addr_t bus_addr);
extern void *drm_pci_alloc(drm_device_t * dev, size_t size,
size_t align, dma_addr_t maxaddr,
dma_addr_t * busaddr);
extern void drm_pci_free(drm_device_t * dev, size_t size,
void *vaddr, dma_addr_t busaddr);
extern drm_dma_handle_t *drm_pci_alloc(drm_device_t *dev, size_t size,
size_t align, dma_addr_t maxaddr);
extern void __drm_pci_free(drm_device_t *dev, drm_dma_handle_t *dmah);
extern void drm_pci_free(drm_device_t *dev, drm_dma_handle_t *dmah);
/* sysfs support (drm_sysfs.c) */
struct drm_sysfs_class;

22
drivers/char/drm/drm_bufs.c
View File

@ -90,6 +90,7 @@ int drm_addmap( struct inode *inode, struct file *filp,
drm_map_t *map;
drm_map_t __user *argp = (void __user *)arg;
drm_map_list_t *list;
drm_dma_handle_t *dmah;
if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */
@ -181,21 +182,19 @@ int drm_addmap( struct inode *inode, struct file *filp,
map->offset += dev->sg->handle;
break;
case _DRM_CONSISTENT:
{
/* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
* As we're limit the address to 2^32-1 (or lses),
* 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. */
dma_addr_t bus_addr;
map->handle = drm_pci_alloc(dev, map->size, map->size,
0xffffffffUL, &bus_addr);
map->offset = (unsigned long)bus_addr;
if (!map->handle) {
dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL);
if (!dmah) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -ENOMEM;
}
map->handle = dmah->vaddr;
map->offset = (unsigned long)dmah->busaddr;
kfree(dmah);
break;
}
default:
drm_free( map, sizeof(*map), DRM_MEM_MAPS );
return -EINVAL;
@ -286,6 +285,8 @@ int drm_rmmap(struct inode *inode, struct file *filp,
}
if(!found_maps) {
drm_dma_handle_t dmah;
switch (map->type) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
@ -307,7 +308,10 @@ int drm_rmmap(struct inode *inode, struct file *filp,
case _DRM_SCATTER_GATHER:
break;
case _DRM_CONSISTENT:
drm_pci_free(dev, map->size, map->handle, map->offset);
dmah.vaddr = map->handle;
dmah.busaddr = map->offset;
dmah.size = map->size;
__drm_pci_free(dev, &dmah);
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);

8
drivers/char/drm/drm_drv.c
View File

@ -198,6 +198,8 @@ int drm_takedown( drm_device_t *dev )
r_list = (drm_map_list_t *)list;
if ( ( map = r_list->map ) ) {
drm_dma_handle_t dmah;
switch ( map->type ) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
@ -229,8 +231,10 @@ int drm_takedown( drm_device_t *dev )
}
break;
case _DRM_CONSISTENT:
drm_pci_free(dev, map->size,
map->handle, map->offset);
dmah.vaddr = map->handle;
dmah.busaddr = map->offset;
dmah.size = map->size;
__drm_pci_free(dev, &dmah);
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);

45
drivers/char/drm/drm_pci.c
View File

@ -46,10 +46,10 @@
/**
* \brief Allocate a PCI consistent memory block, for DMA.
*/
void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
dma_addr_t maxaddr, dma_addr_t * busaddr)
drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
dma_addr_t maxaddr)
{
void *address;
drm_dma_handle_t *dmah;
#if DRM_DEBUG_MEMORY
int area = DRM_MEM_DMA;
@ -74,13 +74,19 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
return NULL;
}
address = pci_alloc_consistent(dev->pdev, size, busaddr);
dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
if (!dmah)
return NULL;
dmah->size = size;
dmah->vaddr = pci_alloc_consistent(dev->pdev, size, &dmah->busaddr);
#if DRM_DEBUG_MEMORY
if (address == NULL) {
if (dmah->vaddr == NULL) {
spin_lock(&drm_mem_lock);
++drm_mem_stats[area].fail_count;
spin_unlock(&drm_mem_lock);
kfree(dmah);
return NULL;
}
@ -90,21 +96,25 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
drm_ram_used += size;
spin_unlock(&drm_mem_lock);
#else
if (address == NULL)
if (dmah->vaddr == NULL) {
kfree(dmah);
return NULL;
}
#endif
memset(address, 0, size);
memset(dmah->vaddr, 0, size);
return address;
return dmah;
}
EXPORT_SYMBOL(drm_pci_alloc);
/**
* \brief Free a PCI consistent memory block.
* \brief Free a PCI consistent memory block with freeing its descriptor.
*
* This function is for internal use in the Linux-specific DRM core code.
*/
void
drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
__drm_pci_free(drm_device_t * dev, drm_dma_handle_t *dmah)
{
#if DRM_DEBUG_MEMORY
int area = DRM_MEM_DMA;
@ -112,12 +122,13 @@ drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
int free_count;
#endif
if (!vaddr) {
if (!dmah->vaddr) {
#if DRM_DEBUG_MEMORY
DRM_MEM_ERROR(area, "Attempt to free address 0\n");
#endif
} else {
pci_free_consistent(dev->pdev, size, vaddr, busaddr);
pci_free_consistent(dev->pdev, dmah->size, dmah->vaddr,
dmah->busaddr);
}
#if DRM_DEBUG_MEMORY
@ -135,6 +146,16 @@ drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
#endif
}
/**
* \brief Free a PCI consistent memory block
*/
void
drm_pci_free(drm_device_t *dev, drm_dma_handle_t *dmah)
{
__drm_pci_free(dev, dmah);
kfree(dmah);
}
EXPORT_SYMBOL(drm_pci_free);
/*@}*/

8
drivers/char/drm/drm_vm.c
View File

@ -210,6 +210,8 @@ 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:
@ -229,8 +231,10 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
case _DRM_SCATTER_GATHER:
break;
case _DRM_CONSISTENT:
drm_pci_free(dev, map->size, map->handle,
map->offset);
dmah.vaddr = map->handle;
dmah.busaddr = map->offset;
dmah.size = map->size;
__drm_pci_free(dev, &dmah);
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);

15
drivers/char/drm/i915_dma.c
View File

@ -95,9 +95,8 @@ static int i915_dma_cleanup(drm_device_t * dev)
drm_core_ioremapfree( &dev_priv->ring.map, dev);
}
if (dev_priv->hw_status_page) {
drm_pci_free(dev, PAGE_SIZE, dev_priv->hw_status_page,
dev_priv->dma_status_page);
if (dev_priv->status_page_dmah) {
drm_pci_free(dev, dev_priv->status_page_dmah);
/* Need to rewrite hardware status page */
I915_WRITE(0x02080, 0x1ffff000);
}
@ -174,16 +173,18 @@ static int i915_initialize(drm_device_t * dev,
dev_priv->allow_batchbuffer = 1;
/* Program Hardware Status Page */
dev_priv->hw_status_page = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
0xffffffff,
&dev_priv->dma_status_page);
dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
0xffffffff);
if (!dev_priv->hw_status_page) {
if (!dev_priv->status_page_dmah) {
dev->dev_private = (void *)dev_priv;
i915_dma_cleanup(dev);
DRM_ERROR("Can not allocate hardware status page\n");
return DRM_ERR(ENOMEM);
}
dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);

3
drivers/char/drm/i915_drv.h
View File

@ -79,9 +79,10 @@ typedef struct drm_i915_private {
drm_i915_sarea_t *sarea_priv;
drm_i915_ring_buffer_t ring;
drm_dma_handle_t *status_page_dmah;
void *hw_status_page;
unsigned long counter;
dma_addr_t dma_status_page;
unsigned long counter;
int back_offset;
int front_offset;