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drm/radeon: remove vm_manager start/suspend

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Just restore the page table instead. Addressing three
problem with this change:

1. Calling vm_manager_suspend in the suspend path is
   problematic cause it wants to wait for the VM use
   to end, which in case of a lockup never happens.

2. In case of a locked up memory controller
   unbinding the VM seems to make it even more
   unstable, creating an unrecoverable lockup
   in the end.

3. If we want to backup/restore the leftover ring
   content we must not unbind VMs in between.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2012-07-05 14:32:00 +02:00
parent 6f72a63199
commit c6105f249a
4 changed files with 60 additions and 51 deletions
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85
drivers/gpu/drm/radeon/radeon_gart.c
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@@ -282,27 +282,58 @@ void radeon_gart_fini(struct radeon_device *rdev)
*
* TODO bind a default page at vm initialization for default address
*/
int radeon_vm_manager_init(struct radeon_device *rdev)
{
struct radeon_vm *vm;
struct radeon_bo_va *bo_va;
int r;
rdev->vm_manager.enabled = false;
if (!rdev->vm_manager.enabled) {
/* mark first vm as always in use, it's the system one */
r = radeon_sa_bo_manager_init(rdev, &rdev->vm_manager.sa_manager,
rdev->vm_manager.max_pfn * 8,
RADEON_GEM_DOMAIN_VRAM);
if (r) {
dev_err(rdev->dev, "failed to allocate vm bo (%dKB)\n",
(rdev->vm_manager.max_pfn * 8) >> 10);
return r;
}
/* mark first vm as always in use, it's the system one */
r = radeon_sa_bo_manager_init(rdev, &rdev->vm_manager.sa_manager,
rdev->vm_manager.max_pfn * 8,
RADEON_GEM_DOMAIN_VRAM);
if (r) {
dev_err(rdev->dev, "failed to allocate vm bo (%dKB)\n",
(rdev->vm_manager.max_pfn * 8) >> 10);
return r;
}
r = rdev->vm_manager.funcs->init(rdev);
if (r == 0)
r = rdev->vm_manager.funcs->init(rdev);
if (r)
return r;
rdev->vm_manager.enabled = true;
return r;
r = radeon_sa_bo_manager_start(rdev, &rdev->vm_manager.sa_manager);
if (r)
return r;
}
/* restore page table */
list_for_each_entry(vm, &rdev->vm_manager.lru_vm, list) {
if (vm->id == -1)
continue;
list_for_each_entry(bo_va, &vm->va, vm_list) {
struct ttm_mem_reg *mem = NULL;
if (bo_va->valid)
mem = &bo_va->bo->tbo.mem;
bo_va->valid = false;
r = radeon_vm_bo_update_pte(rdev, vm, bo_va->bo, mem);
if (r) {
DRM_ERROR("Failed to update pte for vm %d!\n", vm->id);
}
}
r = rdev->vm_manager.funcs->bind(rdev, vm, vm->id);
if (r) {
DRM_ERROR("Failed to bind vm %d!\n", vm->id);
}
}
return 0;
}
/* global mutex must be lock */
@@ -346,27 +377,12 @@ static void radeon_vm_unbind_locked(struct radeon_device *rdev,
}
void radeon_vm_manager_fini(struct radeon_device *rdev)
{
if (rdev->vm_manager.sa_manager.bo == NULL)
return;
radeon_vm_manager_suspend(rdev);
rdev->vm_manager.funcs->fini(rdev);
radeon_sa_bo_manager_fini(rdev, &rdev->vm_manager.sa_manager);
rdev->vm_manager.enabled = false;
}
int radeon_vm_manager_start(struct radeon_device *rdev)
{
if (rdev->vm_manager.sa_manager.bo == NULL) {
return -EINVAL;
}
return radeon_sa_bo_manager_start(rdev, &rdev->vm_manager.sa_manager);
}
int radeon_vm_manager_suspend(struct radeon_device *rdev)
{
struct radeon_vm *vm, *tmp;
if (!rdev->vm_manager.enabled)
return;
mutex_lock(&rdev->vm_manager.lock);
/* unbind all active vm */
list_for_each_entry_safe(vm, tmp, &rdev->vm_manager.lru_vm, list) {
@@ -374,7 +390,10 @@ int radeon_vm_manager_suspend(struct radeon_device *rdev)
}
rdev->vm_manager.funcs->fini(rdev);
mutex_unlock(&rdev->vm_manager.lock);
return radeon_sa_bo_manager_suspend(rdev, &rdev->vm_manager.sa_manager);
radeon_sa_bo_manager_suspend(rdev, &rdev->vm_manager.sa_manager);
radeon_sa_bo_manager_fini(rdev, &rdev->vm_manager.sa_manager);
rdev->vm_manager.enabled = false;
}
/* global mutex must be locked */