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drm/radeon: move IB pool to 1MB offset 

Even GPUs can have a null pointer dereference, so move
the IB pool to another offset to catch those.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
This commit is contained in:
Christian König 2012-09-11 16:09:59 +02:00 committed by Alex Deucher
parent 96a5844f90
commit ca19f21ece
3 changed files with 5 additions and 4 deletions
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1
drivers/gpu/drm/radeon/radeon.h
View File

@ -123,6 +123,7 @@ extern int radeon_lockup_timeout;
#define CAYMAN_RING_TYPE_CP2_INDEX 2
/* hardcode those limit for now */
#define RADEON_VA_IB_OFFSET (1 << 20)
#define RADEON_VA_RESERVED_SIZE (8 << 20)
#define RADEON_IB_VM_MAX_SIZE (64 << 10)

2
drivers/gpu/drm/radeon/radeon_gart.c
View File

@ -980,7 +980,7 @@ int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
/* map the ib pool buffer at 0 in virtual address space, set
* read only
*/
r = radeon_vm_bo_add(rdev, vm, rdev->ring_tmp_bo.bo, 0,
r = radeon_vm_bo_add(rdev, vm, rdev->ring_tmp_bo.bo, RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE | RADEON_VM_PAGE_SNOOPED);
return r;
}

6
drivers/gpu/drm/radeon/radeon_ring.c
View File

@ -79,10 +79,10 @@ int radeon_ib_get(struct radeon_device *rdev, int ring,
ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);
ib->vm = vm;
if (vm) {
/* ib pool is bind at 0 in virtual address space,
* so gpu_addr is the offset inside the pool bo
/* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address
* space and soffset is the offset inside the pool bo
*/
ib->gpu_addr = ib->sa_bo->soffset;
ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET;
} else {
ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);
}