From: Christian König Date: Mon, 12 Oct 2020 13:40:04 +0000 (+0200) Subject: drm/amdgpu: nuke amdgpu_vm_bo_split_mapping v2 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a39f2a8d70666ef728497651a16bca4d23ec8816;p=uclinux-h8%2Flinux.git drm/amdgpu: nuke amdgpu_vm_bo_split_mapping v2 Merge the functionality mostly into amdgpu_vm_bo_update_mapping. This way we can even handle small contiguous system pages without to much extra CPU overhead. v2: fix typo, keep the cursor as it is for now Signed-off-by: Christian König Reviewed-by: Madhav Chauhan (v1) Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 5b162429920b..dc0bc550e42b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1570,7 +1570,8 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params, /** * amdgpu_vm_bo_update_mapping - update a mapping in the vm page table * - * @adev: amdgpu_device pointer + * @adev: amdgpu_device pointer of the VM + * @bo_adev: amdgpu_device pointer of the mapped BO * @vm: requested vm * @immediate: immediate submission in a page fault * @unlocked: unlocked invalidation during MM callback @@ -1578,7 +1579,8 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params, * @start: start of mapped range * @last: last mapped entry * @flags: flags for the entries - * @addr: addr to set the area to + * @offset: offset into nodes and pages_addr + * @nodes: array of drm_mm_nodes with the MC addresses * @pages_addr: DMA addresses to use for mapping * @fence: optional resulting fence * @@ -1588,15 +1590,18 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params, * 0 for success, -EINVAL for failure. */ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, + struct amdgpu_device *bo_adev, struct amdgpu_vm *vm, bool immediate, bool unlocked, struct dma_resv *resv, uint64_t start, uint64_t last, - uint64_t flags, uint64_t addr, + uint64_t flags, uint64_t offset, + struct drm_mm_node *nodes, dma_addr_t *pages_addr, struct dma_fence **fence) { struct amdgpu_vm_update_params params; enum amdgpu_sync_mode sync_mode; + uint64_t pfn; int r; memset(¶ms, 0, sizeof(params)); @@ -1614,6 +1619,14 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, else sync_mode = AMDGPU_SYNC_EXPLICIT; + pfn = offset >> PAGE_SHIFT; + if (nodes) { + while (pfn >= nodes->size) { + pfn -= nodes->size; + ++nodes; + } + } + amdgpu_vm_eviction_lock(vm); if (vm->evicting) { r = -EBUSY; @@ -1632,105 +1645,47 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, if (r) goto error_unlock; - r = amdgpu_vm_update_ptes(¶ms, start, last + 1, addr, flags); - if (r) - goto error_unlock; - - r = vm->update_funcs->commit(¶ms, fence); - -error_unlock: - amdgpu_vm_eviction_unlock(vm); - return r; -} - -/** - * amdgpu_vm_bo_split_mapping - split a mapping into smaller chunks - * - * @adev: amdgpu_device pointer - * @resv: fences we need to sync to - * @pages_addr: DMA addresses to use for mapping - * @vm: requested vm - * @mapping: mapped range and flags to use for the update - * @flags: HW flags for the mapping - * @bo_adev: amdgpu_device pointer that bo actually been allocated - * @nodes: array of drm_mm_nodes with the MC addresses - * @fence: optional resulting fence - * - * Split the mapping into smaller chunks so that each update fits - * into a SDMA IB. - * - * Returns: - * 0 for success, -EINVAL for failure. - */ -static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev, - struct dma_resv *resv, - dma_addr_t *pages_addr, - struct amdgpu_vm *vm, - struct amdgpu_bo_va_mapping *mapping, - uint64_t flags, - struct amdgpu_device *bo_adev, - struct drm_mm_node *nodes, - struct dma_fence **fence) -{ - unsigned min_linear_pages = 1 << adev->vm_manager.fragment_size; - uint64_t pfn, start = mapping->start; - int r; - - /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here - * but in case of something, we filter the flags in first place - */ - if (!(mapping->flags & AMDGPU_PTE_READABLE)) - flags &= ~AMDGPU_PTE_READABLE; - if (!(mapping->flags & AMDGPU_PTE_WRITEABLE)) - flags &= ~AMDGPU_PTE_WRITEABLE; - - /* Apply ASIC specific mapping flags */ - amdgpu_gmc_get_vm_pte(adev, mapping, &flags); - - trace_amdgpu_vm_bo_update(mapping); - - pfn = mapping->offset >> PAGE_SHIFT; - if (nodes) { - while (pfn >= nodes->size) { - pfn -= nodes->size; - ++nodes; - } - } - do { - dma_addr_t *dma_addr = NULL; - uint64_t max_entries; - uint64_t addr, last; + uint64_t tmp, num_entries, addr; - max_entries = mapping->last - start + 1; + + num_entries = last - start + 1; if (nodes) { addr = nodes->start << PAGE_SHIFT; - max_entries = min((nodes->size - pfn) * - AMDGPU_GPU_PAGES_IN_CPU_PAGE, max_entries); + num_entries = min((nodes->size - pfn) * + AMDGPU_GPU_PAGES_IN_CPU_PAGE, num_entries); } else { addr = 0; } if (pages_addr) { - uint64_t count; + bool contiguous = true; - for (count = 1; - count < max_entries / AMDGPU_GPU_PAGES_IN_CPU_PAGE; - ++count) { - uint64_t idx = pfn + count; + if (num_entries > AMDGPU_GPU_PAGES_IN_CPU_PAGE) { + uint64_t count; - if (pages_addr[idx] != - (pages_addr[idx - 1] + PAGE_SIZE)) - break; + contiguous = pages_addr[pfn + 1] == + pages_addr[pfn] + PAGE_SIZE; + + tmp = num_entries / + AMDGPU_GPU_PAGES_IN_CPU_PAGE; + for (count = 2; count < tmp; ++count) { + uint64_t idx = pfn + count; + + if (contiguous != (pages_addr[idx] == + pages_addr[idx - 1] + PAGE_SIZE)) + break; + } + num_entries = count * + AMDGPU_GPU_PAGES_IN_CPU_PAGE; } - if (count < min_linear_pages) { + if (!contiguous) { addr = pfn << PAGE_SHIFT; - dma_addr = pages_addr; + params.pages_addr = pages_addr; } else { addr = pages_addr[pfn]; - max_entries = count * - AMDGPU_GPU_PAGES_IN_CPU_PAGE; + params.pages_addr = NULL; } } else if (flags & (AMDGPU_PTE_VALID | AMDGPU_PTE_PRT)) { @@ -1738,23 +1693,25 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev, addr += pfn << PAGE_SHIFT; } - last = start + max_entries - 1; - r = amdgpu_vm_bo_update_mapping(adev, vm, false, false, resv, - start, last, flags, addr, - dma_addr, fence); + tmp = start + num_entries; + r = amdgpu_vm_update_ptes(¶ms, start, tmp, addr, flags); if (r) - return r; + goto error_unlock; - pfn += (last - start + 1) / AMDGPU_GPU_PAGES_IN_CPU_PAGE; + pfn += num_entries / AMDGPU_GPU_PAGES_IN_CPU_PAGE; if (nodes && nodes->size == pfn) { pfn = 0; ++nodes; } - start = last + 1; + start = tmp; - } while (unlikely(start != mapping->last + 1)); + } while (unlikely(start != last + 1)); - return 0; + r = vm->update_funcs->commit(¶ms, fence); + +error_unlock: + amdgpu_vm_eviction_unlock(vm); + return r; } /** @@ -1835,9 +1792,26 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va, } list_for_each_entry(mapping, &bo_va->invalids, list) { - r = amdgpu_vm_bo_split_mapping(adev, resv, pages_addr, vm, - mapping, flags, bo_adev, nodes, - last_update); + uint64_t update_flags = flags; + + /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here + * but in case of something, we filter the flags in first place + */ + if (!(mapping->flags & AMDGPU_PTE_READABLE)) + update_flags &= ~AMDGPU_PTE_READABLE; + if (!(mapping->flags & AMDGPU_PTE_WRITEABLE)) + update_flags &= ~AMDGPU_PTE_WRITEABLE; + + /* Apply ASIC specific mapping flags */ + amdgpu_gmc_get_vm_pte(adev, mapping, &update_flags); + + trace_amdgpu_vm_bo_update(mapping); + + r = amdgpu_vm_bo_update_mapping(adev, bo_adev, vm, false, false, + resv, mapping->start, + mapping->last, update_flags, + mapping->offset, nodes, + pages_addr, last_update); if (r) return r; } @@ -2045,9 +2019,10 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev, mapping->start < AMDGPU_GMC_HOLE_START) init_pte_value = AMDGPU_PTE_DEFAULT_ATC; - r = amdgpu_vm_bo_update_mapping(adev, vm, false, false, resv, - mapping->start, mapping->last, - init_pte_value, 0, NULL, &f); + r = amdgpu_vm_bo_update_mapping(adev, adev, vm, false, false, + resv, mapping->start, + mapping->last, init_pte_value, + 0, NULL, NULL, &f); amdgpu_vm_free_mapping(adev, vm, mapping, f); if (r) { dma_fence_put(f); @@ -3375,8 +3350,9 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, unsigned int pasid, value = 0; } - r = amdgpu_vm_bo_update_mapping(adev, vm, true, false, NULL, addr, - addr + 1, flags, value, NULL, NULL); + r = amdgpu_vm_bo_update_mapping(adev, adev, vm, true, false, NULL, addr, + addr + 1, flags, value, NULL, NULL, + NULL); if (r) goto error_unlock;