Commit 9c8da5eb authored by Dave Airlie's avatar Dave Airlie Committed by Dave Airlie
Browse files

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: default avatarDavid Airlie <airlied@linux.ie>
parent d59431bf

drivers/char/drm/drmP.h

+10 −6
Original line number Diff line number Diff line
@@ -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;

drivers/char/drm/drm_bufs.c

+13 −9
Original line number Diff line number Diff line
@@ -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);

drivers/char/drm/drm_drv.c

+6 −2
Original line number Diff line number Diff line
@@ -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);

drivers/char/drm/drm_pci.c

+33 −12
Original line number Diff line number Diff line
@@ -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);



/*@}*/

drivers/char/drm/drm_vm.c

+6 −2
Original line number Diff line number Diff line
@@ -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);

CRA Git | Maintained and supported by SUSTech CRA and CCSE