From: Dave Airlie Date: Thu, 28 Apr 2022 04:33:20 +0000 (+1000) Subject: Merge tag 'amd-drm-next-5.19-2022-04-15' of https://gitlab.freedesktop.org/agd5f... X-Git-Tag: v6.6.17~7356^2~22 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dbe946287e0825f0e9cd4cbeacfcde9d9b2dd168;p=platform%2Fkernel%2Flinux-rpi.git Merge tag 'amd-drm-next-5.19-2022-04-15' of https://gitlab.freedesktop.org/agd5f/linux into drm-next amd-drm-next-5.19-2022-04-15: amdgpu: - USB-C updates - GPUVM updates - TMZ fixes for RV - DCN 3.1 pstate fixes - Display z state fixes - RAS fixes - Misc code cleanups and spelling fixes - More DC FP rework - GPUVM TLB handling rework - Power management sysfs code cleanup - Add RAS support for VCN - Backlight fix - Add unique id support for more asics - Misc display updates - SR-IOV fixes - Extend CG and PG flags to 64 bits - Enable VCN clk sysfs nodes for navi12 amdkfd: - Fix IO link cleanup during device removal - RAS fixes - Retry fault fixes - Asynchronously free events - SVM fixes radeon: - Drop some dead code - Misc code cleanups From: Alex Deucher Link: https://patchwork.freedesktop.org/patch/msgid/20220415135144.5700-1-alexander.deucher@amd.com Signed-off-by: Dave Airlie --- dbe946287e0825f0e9cd4cbeacfcde9d9b2dd168 diff --cc drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c index 0000000,958d7ed..7761a3e mode 000000,100644..100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c @@@ -1,0 -1,979 +1,977 @@@ + // SPDX-License-Identifier: GPL-2.0 OR MIT + /* + * Copyright 2022 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + + #include + + #include "amdgpu.h" + #include "amdgpu_trace.h" + #include "amdgpu_vm.h" + + /* + * amdgpu_vm_pt_cursor - state for for_each_amdgpu_vm_pt + */ + struct amdgpu_vm_pt_cursor { + uint64_t pfn; + struct amdgpu_vm_bo_base *parent; + struct amdgpu_vm_bo_base *entry; + unsigned int level; + }; + + /** + * amdgpu_vm_pt_level_shift - return the addr shift for each level + * + * @adev: amdgpu_device pointer + * @level: VMPT level + * + * Returns: + * The number of bits the pfn needs to be right shifted for a level. + */ + static unsigned int amdgpu_vm_pt_level_shift(struct amdgpu_device *adev, + unsigned int level) + { + switch (level) { + case AMDGPU_VM_PDB2: + case AMDGPU_VM_PDB1: + case AMDGPU_VM_PDB0: + return 9 * (AMDGPU_VM_PDB0 - level) + + adev->vm_manager.block_size; + case AMDGPU_VM_PTB: + return 0; + default: + return ~0; + } + } + + /** + * amdgpu_vm_pt_num_entries - return the number of entries in a PD/PT + * + * @adev: amdgpu_device pointer + * @level: VMPT level + * + * Returns: + * The number of entries in a page directory or page table. + */ + static unsigned int amdgpu_vm_pt_num_entries(struct amdgpu_device *adev, + unsigned int level) + { + unsigned int shift; + + shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level); + if (level == adev->vm_manager.root_level) + /* For the root directory */ + return round_up(adev->vm_manager.max_pfn, 1ULL << shift) + >> shift; + else if (level != AMDGPU_VM_PTB) + /* Everything in between */ + return 512; + + /* For the page tables on the leaves */ + return AMDGPU_VM_PTE_COUNT(adev); + } + + /** + * amdgpu_vm_pt_num_ats_entries - return the number of ATS entries in the root PD + * + * @adev: amdgpu_device pointer + * + * Returns: + * The number of entries in the root page directory which needs the ATS setting. + */ + static unsigned int amdgpu_vm_pt_num_ats_entries(struct amdgpu_device *adev) + { + unsigned int shift; + + shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level); + return AMDGPU_GMC_HOLE_START >> (shift + AMDGPU_GPU_PAGE_SHIFT); + } + + /** + * amdgpu_vm_pt_entries_mask - the mask to get the entry number of a PD/PT + * + * @adev: amdgpu_device pointer + * @level: VMPT level + * + * Returns: + * The mask to extract the entry number of a PD/PT from an address. + */ + static uint32_t amdgpu_vm_pt_entries_mask(struct amdgpu_device *adev, + unsigned int level) + { + if (level <= adev->vm_manager.root_level) + return 0xffffffff; + else if (level != AMDGPU_VM_PTB) + return 0x1ff; + else + return AMDGPU_VM_PTE_COUNT(adev) - 1; + } + + /** + * amdgpu_vm_pt_size - returns the size of the page table in bytes + * + * @adev: amdgpu_device pointer + * @level: VMPT level + * + * Returns: + * The size of the BO for a page directory or page table in bytes. + */ + static unsigned int amdgpu_vm_pt_size(struct amdgpu_device *adev, + unsigned int level) + { + return AMDGPU_GPU_PAGE_ALIGN(amdgpu_vm_pt_num_entries(adev, level) * 8); + } + + /** + * amdgpu_vm_pt_parent - get the parent page directory + * + * @pt: child page table + * + * Helper to get the parent entry for the child page table. NULL if we are at + * the root page directory. + */ + static struct amdgpu_vm_bo_base * + amdgpu_vm_pt_parent(struct amdgpu_vm_bo_base *pt) + { + struct amdgpu_bo *parent = pt->bo->parent; + + if (!parent) + return NULL; + + return parent->vm_bo; + } + + /** + * amdgpu_vm_pt_start - start PD/PT walk + * + * @adev: amdgpu_device pointer + * @vm: amdgpu_vm structure + * @start: start address of the walk + * @cursor: state to initialize + * + * Initialize a amdgpu_vm_pt_cursor to start a walk. + */ + static void amdgpu_vm_pt_start(struct amdgpu_device *adev, + struct amdgpu_vm *vm, uint64_t start, + struct amdgpu_vm_pt_cursor *cursor) + { + cursor->pfn = start; + cursor->parent = NULL; + cursor->entry = &vm->root; + cursor->level = adev->vm_manager.root_level; + } + + /** + * amdgpu_vm_pt_descendant - go to child node + * + * @adev: amdgpu_device pointer + * @cursor: current state + * + * Walk to the child node of the current node. + * Returns: + * True if the walk was possible, false otherwise. + */ + static bool amdgpu_vm_pt_descendant(struct amdgpu_device *adev, + struct amdgpu_vm_pt_cursor *cursor) + { + unsigned int mask, shift, idx; + + if ((cursor->level == AMDGPU_VM_PTB) || !cursor->entry || + !cursor->entry->bo) + return false; + + mask = amdgpu_vm_pt_entries_mask(adev, cursor->level); + shift = amdgpu_vm_pt_level_shift(adev, cursor->level); + + ++cursor->level; + idx = (cursor->pfn >> shift) & mask; + cursor->parent = cursor->entry; + cursor->entry = &to_amdgpu_bo_vm(cursor->entry->bo)->entries[idx]; + return true; + } + + /** + * amdgpu_vm_pt_sibling - go to sibling node + * + * @adev: amdgpu_device pointer + * @cursor: current state + * + * Walk to the sibling node of the current node. + * Returns: + * True if the walk was possible, false otherwise. + */ + static bool amdgpu_vm_pt_sibling(struct amdgpu_device *adev, + struct amdgpu_vm_pt_cursor *cursor) + { + + unsigned int shift, num_entries; + struct amdgpu_bo_vm *parent; + + /* Root doesn't have a sibling */ + if (!cursor->parent) + return false; + + /* Go to our parents and see if we got a sibling */ + shift = amdgpu_vm_pt_level_shift(adev, cursor->level - 1); + num_entries = amdgpu_vm_pt_num_entries(adev, cursor->level - 1); + parent = to_amdgpu_bo_vm(cursor->parent->bo); + + if (cursor->entry == &parent->entries[num_entries - 1]) + return false; + + cursor->pfn += 1ULL << shift; + cursor->pfn &= ~((1ULL << shift) - 1); + ++cursor->entry; + return true; + } + + /** + * amdgpu_vm_pt_ancestor - go to parent node + * + * @cursor: current state + * + * Walk to the parent node of the current node. + * Returns: + * True if the walk was possible, false otherwise. + */ + static bool amdgpu_vm_pt_ancestor(struct amdgpu_vm_pt_cursor *cursor) + { + if (!cursor->parent) + return false; + + --cursor->level; + cursor->entry = cursor->parent; + cursor->parent = amdgpu_vm_pt_parent(cursor->parent); + return true; + } + + /** + * amdgpu_vm_pt_next - get next PD/PT in hieratchy + * + * @adev: amdgpu_device pointer + * @cursor: current state + * + * Walk the PD/PT tree to the next node. + */ + static void amdgpu_vm_pt_next(struct amdgpu_device *adev, + struct amdgpu_vm_pt_cursor *cursor) + { + /* First try a newborn child */ + if (amdgpu_vm_pt_descendant(adev, cursor)) + return; + + /* If that didn't worked try to find a sibling */ + while (!amdgpu_vm_pt_sibling(adev, cursor)) { + /* No sibling, go to our parents and grandparents */ + if (!amdgpu_vm_pt_ancestor(cursor)) { + cursor->pfn = ~0ll; + return; + } + } + } + + /** + * amdgpu_vm_pt_first_dfs - start a deep first search + * + * @adev: amdgpu_device structure + * @vm: amdgpu_vm structure + * @start: optional cursor to start with + * @cursor: state to initialize + * + * Starts a deep first traversal of the PD/PT tree. + */ + static void amdgpu_vm_pt_first_dfs(struct amdgpu_device *adev, + struct amdgpu_vm *vm, + struct amdgpu_vm_pt_cursor *start, + struct amdgpu_vm_pt_cursor *cursor) + { + if (start) + *cursor = *start; + else + amdgpu_vm_pt_start(adev, vm, 0, cursor); + + while (amdgpu_vm_pt_descendant(adev, cursor)) + ; + } + + /** + * amdgpu_vm_pt_continue_dfs - check if the deep first search should continue + * + * @start: starting point for the search + * @entry: current entry + * + * Returns: + * True when the search should continue, false otherwise. + */ + static bool amdgpu_vm_pt_continue_dfs(struct amdgpu_vm_pt_cursor *start, + struct amdgpu_vm_bo_base *entry) + { + return entry && (!start || entry != start->entry); + } + + /** + * amdgpu_vm_pt_next_dfs - get the next node for a deep first search + * + * @adev: amdgpu_device structure + * @cursor: current state + * + * Move the cursor to the next node in a deep first search. + */ + static void amdgpu_vm_pt_next_dfs(struct amdgpu_device *adev, + struct amdgpu_vm_pt_cursor *cursor) + { + if (!cursor->entry) + return; + + if (!cursor->parent) + cursor->entry = NULL; + else if (amdgpu_vm_pt_sibling(adev, cursor)) + while (amdgpu_vm_pt_descendant(adev, cursor)) + ; + else + amdgpu_vm_pt_ancestor(cursor); + } + + /* + * for_each_amdgpu_vm_pt_dfs_safe - safe deep first search of all PDs/PTs + */ + #define for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry) \ + for (amdgpu_vm_pt_first_dfs((adev), (vm), (start), &(cursor)), \ + (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor));\ + amdgpu_vm_pt_continue_dfs((start), (entry)); \ + (entry) = (cursor).entry, amdgpu_vm_pt_next_dfs((adev), &(cursor))) + + /** + * amdgpu_vm_pt_clear - initially clear the PDs/PTs + * + * @adev: amdgpu_device pointer + * @vm: VM to clear BO from + * @vmbo: BO to clear + * @immediate: use an immediate update + * + * Root PD needs to be reserved when calling this. + * + * Returns: + * 0 on success, errno otherwise. + */ + int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm, + struct amdgpu_bo_vm *vmbo, bool immediate) + { + unsigned int level = adev->vm_manager.root_level; + struct ttm_operation_ctx ctx = { true, false }; + struct amdgpu_vm_update_params params; + struct amdgpu_bo *ancestor = &vmbo->bo; + unsigned int entries, ats_entries; + struct amdgpu_bo *bo = &vmbo->bo; + uint64_t addr; + int r, idx; + + /* Figure out our place in the hierarchy */ + if (ancestor->parent) { + ++level; + while (ancestor->parent->parent) { + ++level; + ancestor = ancestor->parent; + } + } + + entries = amdgpu_bo_size(bo) / 8; + if (!vm->pte_support_ats) { + ats_entries = 0; + + } else if (!bo->parent) { + ats_entries = amdgpu_vm_pt_num_ats_entries(adev); + ats_entries = min(ats_entries, entries); + entries -= ats_entries; + + } else { + struct amdgpu_vm_bo_base *pt; + + pt = ancestor->vm_bo; + ats_entries = amdgpu_vm_pt_num_ats_entries(adev); + if ((pt - to_amdgpu_bo_vm(vm->root.bo)->entries) >= + ats_entries) { + ats_entries = 0; + } else { + ats_entries = entries; + entries = 0; + } + } + + r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); + if (r) + return r; + + if (vmbo->shadow) { + struct amdgpu_bo *shadow = vmbo->shadow; + + r = ttm_bo_validate(&shadow->tbo, &shadow->placement, &ctx); + if (r) + return r; + } + + if (!drm_dev_enter(adev_to_drm(adev), &idx)) + return -ENODEV; + + r = vm->update_funcs->map_table(vmbo); + if (r) + goto exit; + + memset(¶ms, 0, sizeof(params)); + params.adev = adev; + params.vm = vm; + params.immediate = immediate; + + r = vm->update_funcs->prepare(¶ms, NULL, AMDGPU_SYNC_EXPLICIT); + if (r) + goto exit; + + addr = 0; + if (ats_entries) { + uint64_t value = 0, flags; + + flags = AMDGPU_PTE_DEFAULT_ATC; + if (level != AMDGPU_VM_PTB) { + /* Handle leaf PDEs as PTEs */ + flags |= AMDGPU_PDE_PTE; + amdgpu_gmc_get_vm_pde(adev, level, &value, &flags); + } + + r = vm->update_funcs->update(¶ms, vmbo, addr, 0, + ats_entries, value, flags); + if (r) + goto exit; + + addr += ats_entries * 8; + } + + if (entries) { + uint64_t value = 0, flags = 0; + + if (adev->asic_type >= CHIP_VEGA10) { + if (level != AMDGPU_VM_PTB) { + /* Handle leaf PDEs as PTEs */ + flags |= AMDGPU_PDE_PTE; + amdgpu_gmc_get_vm_pde(adev, level, + &value, &flags); + } else { + /* Workaround for fault priority problem on GMC9 */ + flags = AMDGPU_PTE_EXECUTABLE; + } + } + + r = vm->update_funcs->update(¶ms, vmbo, addr, 0, entries, + value, flags); + if (r) + goto exit; + } + + r = vm->update_funcs->commit(¶ms, NULL); + exit: + drm_dev_exit(idx); + return r; + } + + /** + * amdgpu_vm_pt_create - create bo for PD/PT + * + * @adev: amdgpu_device pointer + * @vm: requesting vm + * @level: the page table level + * @immediate: use a immediate update + * @vmbo: pointer to the buffer object pointer + */ + int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm, + int level, bool immediate, struct amdgpu_bo_vm **vmbo) + { + struct amdgpu_bo_param bp; + struct amdgpu_bo *bo; + struct dma_resv *resv; + unsigned int num_entries; + int r; + + memset(&bp, 0, sizeof(bp)); + + bp.size = amdgpu_vm_pt_size(adev, level); + bp.byte_align = AMDGPU_GPU_PAGE_SIZE; + bp.domain = AMDGPU_GEM_DOMAIN_VRAM; + bp.domain = amdgpu_bo_get_preferred_domain(adev, bp.domain); + bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS | + AMDGPU_GEM_CREATE_CPU_GTT_USWC; + + if (level < AMDGPU_VM_PTB) + num_entries = amdgpu_vm_pt_num_entries(adev, level); + else + num_entries = 0; + + bp.bo_ptr_size = struct_size((*vmbo), entries, num_entries); + + if (vm->use_cpu_for_update) + bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; + + bp.type = ttm_bo_type_kernel; + bp.no_wait_gpu = immediate; + if (vm->root.bo) + bp.resv = vm->root.bo->tbo.base.resv; + + r = amdgpu_bo_create_vm(adev, &bp, vmbo); + if (r) + return r; + + bo = &(*vmbo)->bo; + if (vm->is_compute_context || (adev->flags & AMD_IS_APU)) { + (*vmbo)->shadow = NULL; + return 0; + } + + if (!bp.resv) + WARN_ON(dma_resv_lock(bo->tbo.base.resv, + NULL)); + resv = bp.resv; + memset(&bp, 0, sizeof(bp)); + bp.size = amdgpu_vm_pt_size(adev, level); + bp.domain = AMDGPU_GEM_DOMAIN_GTT; + bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC; + bp.type = ttm_bo_type_kernel; + bp.resv = bo->tbo.base.resv; + bp.bo_ptr_size = sizeof(struct amdgpu_bo); + + r = amdgpu_bo_create(adev, &bp, &(*vmbo)->shadow); + + if (!resv) + dma_resv_unlock(bo->tbo.base.resv); + + if (r) { + amdgpu_bo_unref(&bo); + return r; + } + + (*vmbo)->shadow->parent = amdgpu_bo_ref(bo); + amdgpu_bo_add_to_shadow_list(*vmbo); + + return 0; + } + + /** + * amdgpu_vm_pt_alloc - Allocate a specific page table + * + * @adev: amdgpu_device pointer + * @vm: VM to allocate page tables for + * @cursor: Which page table to allocate + * @immediate: use an immediate update + * + * Make sure a specific page table or directory is allocated. + * + * Returns: + * 1 if page table needed to be allocated, 0 if page table was already + * allocated, negative errno if an error occurred. + */ + static int amdgpu_vm_pt_alloc(struct amdgpu_device *adev, + struct amdgpu_vm *vm, + struct amdgpu_vm_pt_cursor *cursor, + bool immediate) + { + struct amdgpu_vm_bo_base *entry = cursor->entry; + struct amdgpu_bo *pt_bo; + struct amdgpu_bo_vm *pt; + int r; + + if (entry->bo) + return 0; + + r = amdgpu_vm_pt_create(adev, vm, cursor->level, immediate, &pt); + if (r) + return r; + + /* Keep a reference to the root directory to avoid + * freeing them up in the wrong order. + */ + pt_bo = &pt->bo; + pt_bo->parent = amdgpu_bo_ref(cursor->parent->bo); + amdgpu_vm_bo_base_init(entry, vm, pt_bo); + r = amdgpu_vm_pt_clear(adev, vm, pt, immediate); + if (r) + goto error_free_pt; + + return 0; + + error_free_pt: + amdgpu_bo_unref(&pt->shadow); + amdgpu_bo_unref(&pt_bo); + return r; + } + + /** + * amdgpu_vm_pt_free - free one PD/PT + * + * @entry: PDE to free + */ + static void amdgpu_vm_pt_free(struct amdgpu_vm_bo_base *entry) + { + struct amdgpu_bo *shadow; + + if (!entry->bo) + return; + shadow = amdgpu_bo_shadowed(entry->bo); + entry->bo->vm_bo = NULL; + list_del(&entry->vm_status); + amdgpu_bo_unref(&shadow); + amdgpu_bo_unref(&entry->bo); + } + + /** + * amdgpu_vm_pt_free_dfs - free PD/PT levels + * + * @adev: amdgpu device structure + * @vm: amdgpu vm structure + * @start: optional cursor where to start freeing PDs/PTs + * + * Free the page directory or page table level and all sub levels. + */ + static void amdgpu_vm_pt_free_dfs(struct amdgpu_device *adev, + struct amdgpu_vm *vm, + struct amdgpu_vm_pt_cursor *start) + { + struct amdgpu_vm_pt_cursor cursor; + struct amdgpu_vm_bo_base *entry; + - vm->bulk_moveable = false; - + for_each_amdgpu_vm_pt_dfs_safe(adev, vm, start, cursor, entry) + amdgpu_vm_pt_free(entry); + + if (start) + amdgpu_vm_pt_free(start->entry); + } + + /** + * amdgpu_vm_pt_free_root - free root PD + * @adev: amdgpu device structure + * @vm: amdgpu vm structure + * + * Free the root page directory and everything below it. + */ + void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm) + { + amdgpu_vm_pt_free_dfs(adev, vm, NULL); + } + + /** + * amdgpu_vm_pt_is_root_clean - check if a root PD is clean + * + * @adev: amdgpu_device pointer + * @vm: the VM to check + * + * Check all entries of the root PD, if any subsequent PDs are allocated, + * it means there are page table creating and filling, and is no a clean + * VM + * + * Returns: + * 0 if this VM is clean + */ + bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev, + struct amdgpu_vm *vm) + { + enum amdgpu_vm_level root = adev->vm_manager.root_level; + unsigned int entries = amdgpu_vm_pt_num_entries(adev, root); + unsigned int i = 0; + + for (i = 0; i < entries; i++) { + if (to_amdgpu_bo_vm(vm->root.bo)->entries[i].bo) + return false; + } + return true; + } + + /** + * amdgpu_vm_pde_update - update a single level in the hierarchy + * + * @params: parameters for the update + * @entry: entry to update + * + * Makes sure the requested entry in parent is up to date. + */ + int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params, + struct amdgpu_vm_bo_base *entry) + { + struct amdgpu_vm_bo_base *parent = amdgpu_vm_pt_parent(entry); + struct amdgpu_bo *bo = parent->bo, *pbo; + struct amdgpu_vm *vm = params->vm; + uint64_t pde, pt, flags; + unsigned int level; + + for (level = 0, pbo = bo->parent; pbo; ++level) + pbo = pbo->parent; + + level += params->adev->vm_manager.root_level; + amdgpu_gmc_get_pde_for_bo(entry->bo, level, &pt, &flags); + pde = (entry - to_amdgpu_bo_vm(parent->bo)->entries) * 8; + return vm->update_funcs->update(params, to_amdgpu_bo_vm(bo), pde, pt, + 1, 0, flags); + } + + /* + * amdgpu_vm_pte_update_flags - figure out flags for PTE updates + * + * Make sure to set the right flags for the PTEs at the desired level. + */ + static void amdgpu_vm_pte_update_flags(struct amdgpu_vm_update_params *params, + struct amdgpu_bo_vm *pt, + unsigned int level, + uint64_t pe, uint64_t addr, + unsigned int count, uint32_t incr, + uint64_t flags) + + { + if (level != AMDGPU_VM_PTB) { + flags |= AMDGPU_PDE_PTE; + amdgpu_gmc_get_vm_pde(params->adev, level, &addr, &flags); + + } else if (params->adev->asic_type >= CHIP_VEGA10 && + !(flags & AMDGPU_PTE_VALID) && + !(flags & AMDGPU_PTE_PRT)) { + + /* Workaround for fault priority problem on GMC9 */ + flags |= AMDGPU_PTE_EXECUTABLE; + } + + params->vm->update_funcs->update(params, pt, pe, addr, count, incr, + flags); + } + + /** + * amdgpu_vm_pte_fragment - get fragment for PTEs + * + * @params: see amdgpu_vm_update_params definition + * @start: first PTE to handle + * @end: last PTE to handle + * @flags: hw mapping flags + * @frag: resulting fragment size + * @frag_end: end of this fragment + * + * Returns the first possible fragment for the start and end address. + */ + static void amdgpu_vm_pte_fragment(struct amdgpu_vm_update_params *params, + uint64_t start, uint64_t end, uint64_t flags, + unsigned int *frag, uint64_t *frag_end) + { + /** + * The MC L1 TLB supports variable sized pages, based on a fragment + * field in the PTE. When this field is set to a non-zero value, page + * granularity is increased from 4KB to (1 << (12 + frag)). The PTE + * flags are considered valid for all PTEs within the fragment range + * and corresponding mappings are assumed to be physically contiguous. + * + * The L1 TLB can store a single PTE for the whole fragment, + * significantly increasing the space available for translation + * caching. This leads to large improvements in throughput when the + * TLB is under pressure. + * + * The L2 TLB distributes small and large fragments into two + * asymmetric partitions. The large fragment cache is significantly + * larger. Thus, we try to use large fragments wherever possible. + * Userspace can support this by aligning virtual base address and + * allocation size to the fragment size. + * + * Starting with Vega10 the fragment size only controls the L1. The L2 + * is now directly feed with small/huge/giant pages from the walker. + */ + unsigned int max_frag; + + if (params->adev->asic_type < CHIP_VEGA10) + max_frag = params->adev->vm_manager.fragment_size; + else + max_frag = 31; + + /* system pages are non continuously */ + if (params->pages_addr) { + *frag = 0; + *frag_end = end; + return; + } + + /* This intentionally wraps around if no bit is set */ + *frag = min_t(unsigned int, ffs(start) - 1, fls64(end - start) - 1); + if (*frag >= max_frag) { + *frag = max_frag; + *frag_end = end & ~((1ULL << max_frag) - 1); + } else { + *frag_end = start + (1 << *frag); + } + } + + /** + * amdgpu_vm_ptes_update - make sure that page tables are valid + * + * @params: see amdgpu_vm_update_params definition + * @start: start of GPU address range + * @end: end of GPU address range + * @dst: destination address to map to, the next dst inside the function + * @flags: mapping flags + * + * Update the page tables in the range @start - @end. + * + * Returns: + * 0 for success, -EINVAL for failure. + */ + int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params, + uint64_t start, uint64_t end, + uint64_t dst, uint64_t flags) + { + struct amdgpu_device *adev = params->adev; + struct amdgpu_vm_pt_cursor cursor; + uint64_t frag_start = start, frag_end; + unsigned int frag; + int r; + + /* figure out the initial fragment */ + amdgpu_vm_pte_fragment(params, frag_start, end, flags, &frag, + &frag_end); + + /* walk over the address space and update the PTs */ + amdgpu_vm_pt_start(adev, params->vm, start, &cursor); + while (cursor.pfn < end) { + unsigned int shift, parent_shift, mask; + uint64_t incr, entry_end, pe_start; + struct amdgpu_bo *pt; + + if (!params->unlocked) { + /* make sure that the page tables covering the + * address range are actually allocated + */ + r = amdgpu_vm_pt_alloc(params->adev, params->vm, + &cursor, params->immediate); + if (r) + return r; + } + + shift = amdgpu_vm_pt_level_shift(adev, cursor.level); + parent_shift = amdgpu_vm_pt_level_shift(adev, cursor.level - 1); + if (params->unlocked) { + /* Unlocked updates are only allowed on the leaves */ + if (amdgpu_vm_pt_descendant(adev, &cursor)) + continue; + } else if (adev->asic_type < CHIP_VEGA10 && + (flags & AMDGPU_PTE_VALID)) { + /* No huge page support before GMC v9 */ + if (cursor.level != AMDGPU_VM_PTB) { + if (!amdgpu_vm_pt_descendant(adev, &cursor)) + return -ENOENT; + continue; + } + } else if (frag < shift) { + /* We can't use this level when the fragment size is + * smaller than the address shift. Go to the next + * child entry and try again. + */ + if (amdgpu_vm_pt_descendant(adev, &cursor)) + continue; + } else if (frag >= parent_shift) { + /* If the fragment size is even larger than the parent + * shift we should go up one level and check it again. + */ + if (!amdgpu_vm_pt_ancestor(&cursor)) + return -EINVAL; + continue; + } + + pt = cursor.entry->bo; + if (!pt) { + /* We need all PDs and PTs for mapping something, */ + if (flags & AMDGPU_PTE_VALID) + return -ENOENT; + + /* but unmapping something can happen at a higher + * level. + */ + if (!amdgpu_vm_pt_ancestor(&cursor)) + return -EINVAL; + + pt = cursor.entry->bo; + shift = parent_shift; + frag_end = max(frag_end, ALIGN(frag_start + 1, + 1ULL << shift)); + } + + /* Looks good so far, calculate parameters for the update */ + incr = (uint64_t)AMDGPU_GPU_PAGE_SIZE << shift; + mask = amdgpu_vm_pt_entries_mask(adev, cursor.level); + pe_start = ((cursor.pfn >> shift) & mask) * 8; + entry_end = ((uint64_t)mask + 1) << shift; + entry_end += cursor.pfn & ~(entry_end - 1); + entry_end = min(entry_end, end); + + do { + struct amdgpu_vm *vm = params->vm; + uint64_t upd_end = min(entry_end, frag_end); + unsigned int nptes = (upd_end - frag_start) >> shift; + uint64_t upd_flags = flags | AMDGPU_PTE_FRAG(frag); + + /* This can happen when we set higher level PDs to + * silent to stop fault floods. + */ + nptes = max(nptes, 1u); + + trace_amdgpu_vm_update_ptes(params, frag_start, upd_end, + min(nptes, 32u), dst, incr, + upd_flags, + vm->task_info.pid, + vm->immediate.fence_context); + amdgpu_vm_pte_update_flags(params, to_amdgpu_bo_vm(pt), + cursor.level, pe_start, dst, + nptes, incr, upd_flags); + + pe_start += nptes * 8; + dst += nptes * incr; + + frag_start = upd_end; + if (frag_start >= frag_end) { + /* figure out the next fragment */ + amdgpu_vm_pte_fragment(params, frag_start, end, + flags, &frag, &frag_end); + if (frag < shift) + break; + } + } while (frag_start < entry_end); + + if (amdgpu_vm_pt_descendant(adev, &cursor)) { + /* Free all child entries. + * Update the tables with the flags and addresses and free up subsequent + * tables in the case of huge pages or freed up areas. + * This is the maximum you can free, because all other page tables are not + * completely covered by the range and so potentially still in use. + */ + while (cursor.pfn < frag_start) { + /* Make sure previous mapping is freed */ + if (cursor.entry->bo) { + params->table_freed = true; + amdgpu_vm_pt_free_dfs(adev, params->vm, + &cursor); + } + amdgpu_vm_pt_next(adev, &cursor); + } + + } else if (frag >= shift) { + /* or just move on to the next on the same level. */ + amdgpu_vm_pt_next(adev, &cursor); + } + } + + return 0; + }