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drm/radeon: rework the VM code a bit more (v2)

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Roughly based on how nouveau is handling it. Instead of
adding the bo_va when the address is set add the bo_va
when the handle is opened, but set the address to zero
until userspace tells us where to place it.

This fixes another bunch of problems with glamor.

v2: agd5f: fix build after dropping patch 7/8.

Signed-off-by: Christian König <deathsimple@vodafone.de>
This commit is contained in:
Christian König
2012-09-11 16:10:04 +02:00
committed by Alex Deucher
parent d59f70216b
commit e971bd5e45
4 changed files with 159 additions and 77 deletions
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157
drivers/gpu/drm/radeon/radeon_gart.c
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@@ -693,51 +693,83 @@ struct radeon_bo_va *radeon_vm_bo_find(struct radeon_vm *vm,
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
* @offset: requested offset of the buffer in the VM address space
* @flags: attributes of pages (read/write/valid/etc.)
*
* Add @bo into the requested vm (cayman+).
* Add @bo to the list of bos associated with the vm and validate
* the offset requested within the vm address space.
* Add @bo to the list of bos associated with the vm
* Returns newly added bo_va or NULL for failure
*
* Object has to be reserved!
*/
struct radeon_bo_va *radeon_vm_bo_add(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo)
{
struct radeon_bo_va *bo_va;
bo_va = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
if (bo_va == NULL) {
return NULL;
}
bo_va->vm = vm;
bo_va->bo = bo;
bo_va->soffset = 0;
bo_va->eoffset = 0;
bo_va->flags = 0;
bo_va->valid = false;
bo_va->ref_count = 1;
INIT_LIST_HEAD(&bo_va->bo_list);
INIT_LIST_HEAD(&bo_va->vm_list);
mutex_lock(&vm->mutex);
list_add(&bo_va->vm_list, &vm->va);
list_add_tail(&bo_va->bo_list, &bo->va);
mutex_unlock(&vm->mutex);
return bo_va;
}
/**
* radeon_vm_bo_set_addr - set bos virtual address inside a vm
*
* @rdev: radeon_device pointer
* @bo_va: bo_va to store the address
* @soffset: requested offset of the buffer in the VM address space
* @flags: attributes of pages (read/write/valid/etc.)
*
* Set offset of @bo_va (cayman+).
* Validate and set the offset requested within the vm address space.
* Returns 0 for success, error for failure.
*
* Object has to be reserved!
*/
int radeon_vm_bo_add(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo,
uint64_t offset,
uint32_t flags)
int radeon_vm_bo_set_addr(struct radeon_device *rdev,
struct radeon_bo_va *bo_va,
uint64_t soffset,
uint32_t flags)
{
struct radeon_bo_va *bo_va, *tmp;
uint64_t size = radeon_bo_size(bo_va->bo);
uint64_t eoffset, last_offset = 0;
struct radeon_vm *vm = bo_va->vm;
struct radeon_bo_va *tmp;
struct list_head *head;
uint64_t size = radeon_bo_size(bo), last_offset = 0;
unsigned last_pfn;
bo_va = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
if (bo_va == NULL) {
return -ENOMEM;
}
bo_va->vm = vm;
bo_va->bo = bo;
bo_va->soffset = offset;
bo_va->eoffset = offset + size;
bo_va->flags = flags;
bo_va->valid = false;
INIT_LIST_HEAD(&bo_va->bo_list);
INIT_LIST_HEAD(&bo_va->vm_list);
/* make sure object fit at this offset */
if (bo_va->soffset >= bo_va->eoffset) {
kfree(bo_va);
return -EINVAL;
}
if (soffset) {
/* make sure object fit at this offset */
eoffset = soffset + size;
if (soffset >= eoffset) {
return -EINVAL;
}
last_pfn = bo_va->eoffset / RADEON_GPU_PAGE_SIZE;
if (last_pfn > rdev->vm_manager.max_pfn) {
kfree(bo_va);
dev_err(rdev->dev, "va above limit (0x%08X > 0x%08X)\n",
last_pfn, rdev->vm_manager.max_pfn);
return -EINVAL;
last_pfn = eoffset / RADEON_GPU_PAGE_SIZE;
if (last_pfn > rdev->vm_manager.max_pfn) {
dev_err(rdev->dev, "va above limit (0x%08X > 0x%08X)\n",
last_pfn, rdev->vm_manager.max_pfn);
return -EINVAL;
}
} else {
eoffset = last_pfn = 0;
}
mutex_lock(&vm->mutex);
@@ -758,24 +790,33 @@ int radeon_vm_bo_add(struct radeon_device *rdev,
head = &vm->va;
last_offset = 0;
list_for_each_entry(tmp, &vm->va, vm_list) {
if (bo_va->soffset >= last_offset && bo_va->eoffset <= tmp->soffset) {
if (bo_va == tmp) {
/* skip over currently modified bo */
continue;
}
if (soffset >= last_offset && eoffset <= tmp->soffset) {
/* bo can be added before this one */
break;
}
if (bo_va->eoffset > tmp->soffset && bo_va->soffset < tmp->eoffset) {
if (eoffset > tmp->soffset && soffset < tmp->eoffset) {
/* bo and tmp overlap, invalid offset */
dev_err(rdev->dev, "bo %p va 0x%08X conflict with (bo %p 0x%08X 0x%08X)\n",
bo, (unsigned)bo_va->soffset, tmp->bo,
bo_va->bo, (unsigned)bo_va->soffset, tmp->bo,
(unsigned)tmp->soffset, (unsigned)tmp->eoffset);
kfree(bo_va);
mutex_unlock(&vm->mutex);
return -EINVAL;
}
last_offset = tmp->eoffset;
head = &tmp->vm_list;
}
list_add(&bo_va->vm_list, head);
list_add_tail(&bo_va->bo_list, &bo->va);
bo_va->soffset = soffset;
bo_va->eoffset = eoffset;
bo_va->flags = flags;
bo_va->valid = false;
list_move(&bo_va->vm_list, head);
mutex_unlock(&vm->mutex);
return 0;
}
@@ -855,6 +896,12 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
return -EINVAL;
}
if (!bo_va->soffset) {
dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n",
bo, vm);
return -EINVAL;
}
if ((bo_va->valid && mem) || (!bo_va->valid && mem == NULL))
return 0;
@@ -921,33 +968,26 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
* radeon_vm_bo_rmv - remove a bo to a specific vm
*
* @rdev: radeon_device pointer
* @vm: requested vm
* @bo: radeon buffer object
* @bo_va: requested bo_va
*
* Remove @bo from the requested vm (cayman+).
* Remove @bo from the list of bos associated with the vm and
* remove the ptes for @bo in the page table.
* Remove @bo_va->bo from the requested vm (cayman+).
* Remove @bo_va->bo from the list of bos associated with the bo_va->vm and
* remove the ptes for @bo_va in the page table.
* Returns 0 for success.
*
* Object have to be reserved!
*/
int radeon_vm_bo_rmv(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_bo *bo)
struct radeon_bo_va *bo_va)
{
struct radeon_bo_va *bo_va;
int r;
bo_va = radeon_vm_bo_find(vm, bo);
if (bo_va == NULL)
return 0;
mutex_lock(&rdev->vm_manager.lock);
mutex_lock(&vm->mutex);
r = radeon_vm_bo_update_pte(rdev, vm, bo, NULL);
mutex_lock(&bo_va->vm->mutex);
r = radeon_vm_bo_update_pte(rdev, bo_va->vm, bo_va->bo, NULL);
mutex_unlock(&rdev->vm_manager.lock);
list_del(&bo_va->vm_list);
mutex_unlock(&vm->mutex);
mutex_unlock(&bo_va->vm->mutex);
list_del(&bo_va->bo_list);
kfree(bo_va);
@@ -987,6 +1027,7 @@ void radeon_vm_bo_invalidate(struct radeon_device *rdev,
*/
int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
{
struct radeon_bo_va *bo_va;
int r;
vm->id = 0;
@@ -1006,8 +1047,10 @@ 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, RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE | RADEON_VM_PAGE_SNOOPED);
bo_va = radeon_vm_bo_add(rdev, vm, rdev->ring_tmp_bo.bo);
r = radeon_vm_bo_set_addr(rdev, bo_va, RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE |
RADEON_VM_PAGE_SNOOPED);
return r;
}