From: Christian König Date: Tue, 26 May 2015 10:24:15 +0000 (+0200) Subject: drm/radeon: stop using addr to check for BO move X-Git-Tag: firefly_0821_release~176^2~1470^2~48^2~2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=161ab658a611df14fb0365b7b70a8c5fed3e4870;p=firefly-linux-kernel-4.4.55.git drm/radeon: stop using addr to check for BO move It is theoretically possible that a swapped out BO gets the same GTT address, but different backing pages while being swapped in. Instead just use another VA state to note updated areas. Signed-off-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index b0b73f2edfc9..2ffca1d920d4 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -467,7 +467,6 @@ struct radeon_bo_va { /* protected by bo being reserved */ struct list_head bo_list; uint32_t flags; - uint64_t addr; struct radeon_fence *last_pt_update; unsigned ref_count; @@ -941,6 +940,9 @@ struct radeon_vm { /* BOs freed, but not yet updated in the PT */ struct list_head freed; + /* BOs cleared in the PT */ + struct list_head cleared; + /* contains the page directory */ struct radeon_bo *page_directory; unsigned max_pde_used; diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c index de42fc4a22b8..9739ded91b7a 100644 --- a/drivers/gpu/drm/radeon/radeon_vm.c +++ b/drivers/gpu/drm/radeon/radeon_vm.c @@ -331,7 +331,6 @@ struct radeon_bo_va *radeon_vm_bo_add(struct radeon_device *rdev, bo_va->it.start = 0; bo_va->it.last = 0; bo_va->flags = 0; - bo_va->addr = 0; bo_va->ref_count = 1; INIT_LIST_HEAD(&bo_va->bo_list); INIT_LIST_HEAD(&bo_va->vm_status); @@ -491,9 +490,11 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, } if (bo_va->it.start || bo_va->it.last) { - if (bo_va->addr) { + spin_lock(&vm->status_lock); + if (list_empty(&bo_va->vm_status)) { /* add a clone of the bo_va to clear the old address */ struct radeon_bo_va *tmp; + spin_unlock(&vm->status_lock); tmp = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL); if (!tmp) { mutex_unlock(&vm->mutex); @@ -502,14 +503,11 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, tmp->it.start = bo_va->it.start; tmp->it.last = bo_va->it.last; tmp->vm = vm; - tmp->addr = bo_va->addr; tmp->bo = radeon_bo_ref(bo_va->bo); spin_lock(&vm->status_lock); list_add(&tmp->vm_status, &vm->freed); - spin_unlock(&vm->status_lock); - - bo_va->addr = 0; } + spin_unlock(&vm->status_lock); interval_tree_remove(&bo_va->it, &vm->va); bo_va->it.start = 0; @@ -520,10 +518,12 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, bo_va->it.start = soffset; bo_va->it.last = eoffset - 1; interval_tree_insert(&bo_va->it, &vm->va); + spin_lock(&vm->status_lock); + list_add(&bo_va->vm_status, &vm->cleared); + spin_unlock(&vm->status_lock); } bo_va->flags = flags; - bo_va->addr = 0; soffset >>= radeon_vm_block_size; eoffset >>= radeon_vm_block_size; @@ -921,7 +921,16 @@ int radeon_vm_bo_update(struct radeon_device *rdev, } spin_lock(&vm->status_lock); - list_del_init(&bo_va->vm_status); + if (mem) { + if (list_empty(&bo_va->vm_status)) { + spin_unlock(&vm->status_lock); + return 0; + } + list_del_init(&bo_va->vm_status); + } else { + list_del(&bo_va->vm_status); + list_add(&bo_va->vm_status, &vm->cleared); + } spin_unlock(&vm->status_lock); bo_va->flags &= ~RADEON_VM_PAGE_VALID; @@ -947,10 +956,6 @@ int radeon_vm_bo_update(struct radeon_device *rdev, addr = 0; } - if (addr == bo_va->addr) - return 0; - bo_va->addr = addr; - trace_radeon_vm_bo_update(bo_va); nptes = bo_va->it.last - bo_va->it.start + 1; @@ -1038,7 +1043,7 @@ int radeon_vm_clear_freed(struct radeon_device *rdev, struct radeon_vm *vm) { struct radeon_bo_va *bo_va; - int r; + int r = 0; spin_lock(&vm->status_lock); while (!list_empty(&vm->freed)) { @@ -1049,14 +1054,15 @@ int radeon_vm_clear_freed(struct radeon_device *rdev, r = radeon_vm_bo_update(rdev, bo_va, NULL); radeon_bo_unref(&bo_va->bo); radeon_fence_unref(&bo_va->last_pt_update); + spin_lock(&vm->status_lock); + list_del(&bo_va->vm_status); kfree(bo_va); if (r) - return r; + break; - spin_lock(&vm->status_lock); } spin_unlock(&vm->status_lock); - return 0; + return r; } @@ -1114,14 +1120,14 @@ void radeon_vm_bo_rmv(struct radeon_device *rdev, mutex_lock(&vm->mutex); if (bo_va->it.start || bo_va->it.last) interval_tree_remove(&bo_va->it, &vm->va); - spin_lock(&vm->status_lock); - list_del(&bo_va->vm_status); - if (bo_va->addr) { + spin_lock(&vm->status_lock); + if (list_empty(&bo_va->vm_status)) { bo_va->bo = radeon_bo_ref(bo_va->bo); list_add(&bo_va->vm_status, &vm->freed); } else { radeon_fence_unref(&bo_va->last_pt_update); + list_del(&bo_va->vm_status); kfree(bo_va); } spin_unlock(&vm->status_lock); @@ -1144,12 +1150,10 @@ void radeon_vm_bo_invalidate(struct radeon_device *rdev, struct radeon_bo_va *bo_va; list_for_each_entry(bo_va, &bo->va, bo_list) { - if (bo_va->addr) { - spin_lock(&bo_va->vm->status_lock); - list_del(&bo_va->vm_status); + spin_lock(&bo_va->vm->status_lock); + if (list_empty(&bo_va->vm_status)) list_add(&bo_va->vm_status, &bo_va->vm->invalidated); - spin_unlock(&bo_va->vm->status_lock); - } + spin_unlock(&bo_va->vm->status_lock); } } @@ -1179,6 +1183,7 @@ int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm) spin_lock_init(&vm->status_lock); INIT_LIST_HEAD(&vm->invalidated); INIT_LIST_HEAD(&vm->freed); + INIT_LIST_HEAD(&vm->cleared); pd_size = radeon_vm_directory_size(rdev); pd_entries = radeon_vm_num_pdes(rdev);