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Diffstat (limited to 'rr-cache/bc3bc775dae1d19bda4dd320b9463ba777208695/preimage.1')
| -rw-r--r-- | rr-cache/bc3bc775dae1d19bda4dd320b9463ba777208695/preimage.1 | 2102 |
1 files changed, 0 insertions, 2102 deletions
diff --git a/rr-cache/bc3bc775dae1d19bda4dd320b9463ba777208695/preimage.1 b/rr-cache/bc3bc775dae1d19bda4dd320b9463ba777208695/preimage.1 deleted file mode 100644 index bbb3bac849b2..000000000000 --- a/rr-cache/bc3bc775dae1d19bda4dd320b9463ba777208695/preimage.1 +++ /dev/null @@ -1,2102 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2022 Intel Corporation - */ - -#include <linux/dma-fence-array.h> - -#include "xe_pt.h" - -#include "regs/xe_gtt_defs.h" -#include "xe_bo.h" -#include "xe_device.h" -#include "xe_drm_client.h" -#include "xe_exec_queue.h" -#include "xe_gt.h" -#include "xe_gt_tlb_invalidation.h" -#include "xe_migrate.h" -#include "xe_pt_types.h" -#include "xe_pt_walk.h" -#include "xe_res_cursor.h" -#include "xe_sched_job.h" -#include "xe_sync.h" -#include "xe_trace.h" -#include "xe_ttm_stolen_mgr.h" -#include "xe_vm.h" - -struct xe_pt_dir { - struct xe_pt pt; - /** @children: Array of page-table child nodes */ - struct xe_ptw *children[XE_PDES]; -}; - -#if IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM) -#define xe_pt_set_addr(__xe_pt, __addr) ((__xe_pt)->addr = (__addr)) -#define xe_pt_addr(__xe_pt) ((__xe_pt)->addr) -#else -#define xe_pt_set_addr(__xe_pt, __addr) -#define xe_pt_addr(__xe_pt) 0ull -#endif - -static const u64 xe_normal_pt_shifts[] = {12, 21, 30, 39, 48}; -static const u64 xe_compact_pt_shifts[] = {16, 21, 30, 39, 48}; - -#define XE_PT_HIGHEST_LEVEL (ARRAY_SIZE(xe_normal_pt_shifts) - 1) - -static struct xe_pt_dir *as_xe_pt_dir(struct xe_pt *pt) -{ - return container_of(pt, struct xe_pt_dir, pt); -} - -static struct xe_pt *xe_pt_entry(struct xe_pt_dir *pt_dir, unsigned int index) -{ - return container_of(pt_dir->children[index], struct xe_pt, base); -} - -static u64 __xe_pt_empty_pte(struct xe_tile *tile, struct xe_vm *vm, - unsigned int level) -{ - struct xe_device *xe = tile_to_xe(tile); - u16 pat_index = xe->pat.idx[XE_CACHE_WB]; - u8 id = tile->id; - - if (!xe_vm_has_scratch(vm)) - return 0; - - if (level > MAX_HUGEPTE_LEVEL) - return vm->pt_ops->pde_encode_bo(vm->scratch_pt[id][level - 1]->bo, - 0, pat_index); - - return vm->pt_ops->pte_encode_addr(xe, 0, pat_index, level, IS_DGFX(xe), 0) | - XE_PTE_NULL; -} - -static void xe_pt_free(struct xe_pt *pt) -{ - if (pt->level) - kfree(as_xe_pt_dir(pt)); - else - kfree(pt); -} - -/** - * xe_pt_create() - Create a page-table. - * @vm: The vm to create for. - * @tile: The tile to create for. - * @level: The page-table level. - * - * Allocate and initialize a single struct xe_pt metadata structure. Also - * create the corresponding page-table bo, but don't initialize it. If the - * level is grater than zero, then it's assumed to be a directory page- - * table and the directory structure is also allocated and initialized to - * NULL pointers. - * - * Return: A valid struct xe_pt pointer on success, Pointer error code on - * error. - */ -struct xe_pt *xe_pt_create(struct xe_vm *vm, struct xe_tile *tile, - unsigned int level) -{ - struct xe_pt *pt; - struct xe_bo *bo; - int err; - - if (level) { - struct xe_pt_dir *dir = kzalloc(sizeof(*dir), GFP_KERNEL); - - pt = (dir) ? &dir->pt : NULL; - } else { - pt = kzalloc(sizeof(*pt), GFP_KERNEL); - } - if (!pt) - return ERR_PTR(-ENOMEM); - - pt->level = level; - bo = xe_bo_create_pin_map(vm->xe, tile, vm, SZ_4K, - ttm_bo_type_kernel, - XE_BO_FLAG_VRAM_IF_DGFX(tile) | - XE_BO_FLAG_IGNORE_MIN_PAGE_SIZE | - XE_BO_FLAG_PINNED | - XE_BO_FLAG_NO_RESV_EVICT | - XE_BO_FLAG_PAGETABLE); - if (IS_ERR(bo)) { - err = PTR_ERR(bo); - goto err_kfree; - } - pt->bo = bo; - pt->base.children = level ? as_xe_pt_dir(pt)->children : NULL; - - if (vm->xef) - xe_drm_client_add_bo(vm->xef->client, pt->bo); - xe_tile_assert(tile, level <= XE_VM_MAX_LEVEL); - - return pt; - -err_kfree: - xe_pt_free(pt); - return ERR_PTR(err); -} - -/** - * xe_pt_populate_empty() - Populate a page-table bo with scratch- or zero - * entries. - * @tile: The tile the scratch pagetable of which to use. - * @vm: The vm we populate for. - * @pt: The pagetable the bo of which to initialize. - * - * Populate the page-table bo of @pt with entries pointing into the tile's - * scratch page-table tree if any. Otherwise populate with zeros. - */ -void xe_pt_populate_empty(struct xe_tile *tile, struct xe_vm *vm, - struct xe_pt *pt) -{ - struct iosys_map *map = &pt->bo->vmap; - u64 empty; - int i; - - if (!xe_vm_has_scratch(vm)) { - /* - * FIXME: Some memory is allocated already allocated to zero? - * Find out which memory that is and avoid this memset... - */ - xe_map_memset(vm->xe, map, 0, 0, SZ_4K); - } else { - empty = __xe_pt_empty_pte(tile, vm, pt->level); - for (i = 0; i < XE_PDES; i++) - xe_pt_write(vm->xe, map, i, empty); - } -} - -/** - * xe_pt_shift() - Return the ilog2 value of the size of the address range of - * a page-table at a certain level. - * @level: The level. - * - * Return: The ilog2 value of the size of the address range of a page-table - * at level @level. - */ -unsigned int xe_pt_shift(unsigned int level) -{ - return XE_PTE_SHIFT + XE_PDE_SHIFT * level; -} - -/** - * xe_pt_destroy() - Destroy a page-table tree. - * @pt: The root of the page-table tree to destroy. - * @flags: vm flags. Currently unused. - * @deferred: List head of lockless list for deferred putting. NULL for - * immediate putting. - * - * Puts the page-table bo, recursively calls xe_pt_destroy on all children - * and finally frees @pt. TODO: Can we remove the @flags argument? - */ -void xe_pt_destroy(struct xe_pt *pt, u32 flags, struct llist_head *deferred) -{ - int i; - - if (!pt) - return; - - XE_WARN_ON(!list_empty(&pt->bo->ttm.base.gpuva.list)); - xe_bo_unpin(pt->bo); - xe_bo_put_deferred(pt->bo, deferred); - - if (pt->level > 0 && pt->num_live) { - struct xe_pt_dir *pt_dir = as_xe_pt_dir(pt); - - for (i = 0; i < XE_PDES; i++) { - if (xe_pt_entry(pt_dir, i)) - xe_pt_destroy(xe_pt_entry(pt_dir, i), flags, - deferred); - } - } - xe_pt_free(pt); -} - -/** - * DOC: Pagetable building - * - * Below we use the term "page-table" for both page-directories, containing - * pointers to lower level page-directories or page-tables, and level 0 - * page-tables that contain only page-table-entries pointing to memory pages. - * - * When inserting an address range in an already existing page-table tree - * there will typically be a set of page-tables that are shared with other - * address ranges, and a set that are private to this address range. - * The set of shared page-tables can be at most two per level, - * and those can't be updated immediately because the entries of those - * page-tables may still be in use by the gpu for other mappings. Therefore - * when inserting entries into those, we instead stage those insertions by - * adding insertion data into struct xe_vm_pgtable_update structures. This - * data, (subtrees for the cpu and page-table-entries for the gpu) is then - * added in a separate commit step. CPU-data is committed while still under the - * vm lock, the object lock and for userptr, the notifier lock in read mode. - * The GPU async data is committed either by the GPU or CPU after fulfilling - * relevant dependencies. - * For non-shared page-tables (and, in fact, for shared ones that aren't - * existing at the time of staging), we add the data in-place without the - * special update structures. This private part of the page-table tree will - * remain disconnected from the vm page-table tree until data is committed to - * the shared page tables of the vm tree in the commit phase. - */ - -struct xe_pt_update { - /** @update: The update structure we're building for this parent. */ - struct xe_vm_pgtable_update *update; - /** @parent: The parent. Used to detect a parent change. */ - struct xe_pt *parent; - /** @preexisting: Whether the parent was pre-existing or allocated */ - bool preexisting; -}; - -struct xe_pt_stage_bind_walk { - /** base: The base class. */ - struct xe_pt_walk base; - - /* Input parameters for the walk */ - /** @vm: The vm we're building for. */ - struct xe_vm *vm; - /** @tile: The tile we're building for. */ - struct xe_tile *tile; - /** @default_pte: PTE flag only template. No address is associated */ - u64 default_pte; - /** @dma_offset: DMA offset to add to the PTE. */ - u64 dma_offset; - /** - * @needs_64k: This address range enforces 64K alignment and - * granularity. - */ - bool needs_64K; - /** - * @vma: VMA being mapped - */ - struct xe_vma *vma; - - /* Also input, but is updated during the walk*/ - /** @curs: The DMA address cursor. */ - struct xe_res_cursor *curs; - /** @va_curs_start: The Virtual address coresponding to @curs->start */ - u64 va_curs_start; - - /* Output */ - struct xe_walk_update { - /** @wupd.entries: Caller provided storage. */ - struct xe_vm_pgtable_update *entries; - /** @wupd.num_used_entries: Number of update @entries used. */ - unsigned int num_used_entries; - /** @wupd.updates: Tracks the update entry at a given level */ - struct xe_pt_update updates[XE_VM_MAX_LEVEL + 1]; - } wupd; - - /* Walk state */ - /** - * @l0_end_addr: The end address of the current l0 leaf. Used for - * 64K granularity detection. - */ - u64 l0_end_addr; - /** @addr_64K: The start address of the current 64K chunk. */ - u64 addr_64K; - /** @found_64: Whether @add_64K actually points to a 64K chunk. */ - bool found_64K; -}; - -static int -xe_pt_new_shared(struct xe_walk_update *wupd, struct xe_pt *parent, - pgoff_t offset, bool alloc_entries) -{ - struct xe_pt_update *upd = &wupd->updates[parent->level]; - struct xe_vm_pgtable_update *entry; - - /* - * For *each level*, we could only have one active - * struct xt_pt_update at any one time. Once we move on to a - * new parent and page-directory, the old one is complete, and - * updates are either already stored in the build tree or in - * @wupd->entries - */ - if (likely(upd->parent == parent)) - return 0; - - upd->parent = parent; - upd->preexisting = true; - - if (wupd->num_used_entries == XE_VM_MAX_LEVEL * 2 + 1) - return -EINVAL; - - entry = wupd->entries + wupd->num_used_entries++; - upd->update = entry; - entry->ofs = offset; - entry->pt_bo = parent->bo; - entry->pt = parent; - entry->flags = 0; - entry->qwords = 0; - entry->pt_bo->update_index = -1; - - if (alloc_entries) { - entry->pt_entries = kmalloc_array(XE_PDES, - sizeof(*entry->pt_entries), - GFP_KERNEL); - if (!entry->pt_entries) - return -ENOMEM; - } - - return 0; -} - -/* - * NOTE: This is a very frequently called function so we allow ourselves - * to annotate (using branch prediction hints) the fastpath of updating a - * non-pre-existing pagetable with leaf ptes. - */ -static int -xe_pt_insert_entry(struct xe_pt_stage_bind_walk *xe_walk, struct xe_pt *parent, - pgoff_t offset, struct xe_pt *xe_child, u64 pte) -{ - struct xe_pt_update *upd = &xe_walk->wupd.updates[parent->level]; - struct xe_pt_update *child_upd = xe_child ? - &xe_walk->wupd.updates[xe_child->level] : NULL; - int ret; - - ret = xe_pt_new_shared(&xe_walk->wupd, parent, offset, true); - if (unlikely(ret)) - return ret; - - /* - * Register this new pagetable so that it won't be recognized as - * a shared pagetable by a subsequent insertion. - */ - if (unlikely(child_upd)) { - child_upd->update = NULL; - child_upd->parent = xe_child; - child_upd->preexisting = false; - } - - if (likely(!upd->preexisting)) { - /* Continue building a non-connected subtree. */ - struct iosys_map *map = &parent->bo->vmap; - - if (unlikely(xe_child)) - parent->base.children[offset] = &xe_child->base; - - xe_pt_write(xe_walk->vm->xe, map, offset, pte); - parent->num_live++; - } else { - /* Shared pt. Stage update. */ - unsigned int idx; - struct xe_vm_pgtable_update *entry = upd->update; - - idx = offset - entry->ofs; - entry->pt_entries[idx].pt = xe_child; - entry->pt_entries[idx].pte = pte; - entry->qwords++; - } - - return 0; -} - -static bool xe_pt_hugepte_possible(u64 addr, u64 next, unsigned int level, - struct xe_pt_stage_bind_walk *xe_walk) -{ - u64 size, dma; - - if (level > MAX_HUGEPTE_LEVEL) - return false; - - /* Does the virtual range requested cover a huge pte? */ - if (!xe_pt_covers(addr, next, level, &xe_walk->base)) - return false; - - /* Does the DMA segment cover the whole pte? */ - if (next - xe_walk->va_curs_start > xe_walk->curs->size) - return false; - - /* null VMA's do not have dma addresses */ - if (xe_vma_is_null(xe_walk->vma)) - return true; - - /* Is the DMA address huge PTE size aligned? */ - size = next - addr; - dma = addr - xe_walk->va_curs_start + xe_res_dma(xe_walk->curs); - - return IS_ALIGNED(dma, size); -} - -/* - * Scan the requested mapping to check whether it can be done entirely - * with 64K PTEs. - */ -static bool -xe_pt_scan_64K(u64 addr, u64 next, struct xe_pt_stage_bind_walk *xe_walk) -{ - struct xe_res_cursor curs = *xe_walk->curs; - - if (!IS_ALIGNED(addr, SZ_64K)) - return false; - - if (next > xe_walk->l0_end_addr) - return false; - - /* null VMA's do not have dma addresses */ - if (xe_vma_is_null(xe_walk->vma)) - return true; - - xe_res_next(&curs, addr - xe_walk->va_curs_start); - for (; addr < next; addr += SZ_64K) { - if (!IS_ALIGNED(xe_res_dma(&curs), SZ_64K) || curs.size < SZ_64K) - return false; - - xe_res_next(&curs, SZ_64K); - } - - return addr == next; -} - -/* - * For non-compact "normal" 4K level-0 pagetables, we want to try to group - * addresses together in 64K-contigous regions to add a 64K TLB hint for the - * device to the PTE. - * This function determines whether the address is part of such a - * segment. For VRAM in normal pagetables, this is strictly necessary on - * some devices. - */ -static bool -xe_pt_is_pte_ps64K(u64 addr, u64 next, struct xe_pt_stage_bind_walk *xe_walk) -{ - /* Address is within an already found 64k region */ - if (xe_walk->found_64K && addr - xe_walk->addr_64K < SZ_64K) - return true; - - xe_walk->found_64K = xe_pt_scan_64K(addr, addr + SZ_64K, xe_walk); - xe_walk->addr_64K = addr; - - return xe_walk->found_64K; -} - -static int -xe_pt_stage_bind_entry(struct xe_ptw *parent, pgoff_t offset, - unsigned int level, u64 addr, u64 next, - struct xe_ptw **child, - enum page_walk_action *action, - struct xe_pt_walk *walk) -{ - struct xe_pt_stage_bind_walk *xe_walk = - container_of(walk, typeof(*xe_walk), base); - u16 pat_index = xe_walk->vma->pat_index; - struct xe_pt *xe_parent = container_of(parent, typeof(*xe_parent), base); - struct xe_vm *vm = xe_walk->vm; - struct xe_pt *xe_child; - bool covers; - int ret = 0; - u64 pte; - - /* Is this a leaf entry ?*/ - if (level == 0 || xe_pt_hugepte_possible(addr, next, level, xe_walk)) { - struct xe_res_cursor *curs = xe_walk->curs; - bool is_null = xe_vma_is_null(xe_walk->vma); - - XE_WARN_ON(xe_walk->va_curs_start != addr); - - pte = vm->pt_ops->pte_encode_vma(is_null ? 0 : - xe_res_dma(curs) + xe_walk->dma_offset, - xe_walk->vma, pat_index, level); - pte |= xe_walk->default_pte; - - /* - * Set the XE_PTE_PS64 hint if possible, otherwise if - * this device *requires* 64K PTE size for VRAM, fail. - */ - if (level == 0 && !xe_parent->is_compact) { - if (xe_pt_is_pte_ps64K(addr, next, xe_walk)) { - xe_walk->vma->gpuva.flags |= XE_VMA_PTE_64K; - pte |= XE_PTE_PS64; - } else if (XE_WARN_ON(xe_walk->needs_64K)) { - return -EINVAL; - } - } - - ret = xe_pt_insert_entry(xe_walk, xe_parent, offset, NULL, pte); - if (unlikely(ret)) - return ret; - - if (!is_null) - xe_res_next(curs, next - addr); - xe_walk->va_curs_start = next; - xe_walk->vma->gpuva.flags |= (XE_VMA_PTE_4K << level); - *action = ACTION_CONTINUE; - - return ret; - } - - /* - * Descending to lower level. Determine if we need to allocate a - * new page table or -directory, which we do if there is no - * previous one or there is one we can completely replace. - */ - if (level == 1) { - walk->shifts = xe_normal_pt_shifts; - xe_walk->l0_end_addr = next; - } - - covers = xe_pt_covers(addr, next, level, &xe_walk->base); - if (covers || !*child) { - u64 flags = 0; - - xe_child = xe_pt_create(xe_walk->vm, xe_walk->tile, level - 1); - if (IS_ERR(xe_child)) - return PTR_ERR(xe_child); - - xe_pt_set_addr(xe_child, - round_down(addr, 1ull << walk->shifts[level])); - - if (!covers) - xe_pt_populate_empty(xe_walk->tile, xe_walk->vm, xe_child); - - *child = &xe_child->base; - - /* - * Prefer the compact pagetable layout for L0 if possible. Only - * possible if VMA covers entire 2MB region as compact 64k and - * 4k pages cannot be mixed within a 2MB region. - * TODO: Suballocate the pt bo to avoid wasting a lot of - * memory. - */ - if (GRAPHICS_VERx100(tile_to_xe(xe_walk->tile)) >= 1250 && level == 1 && - covers && xe_pt_scan_64K(addr, next, xe_walk)) { - walk->shifts = xe_compact_pt_shifts; - xe_walk->vma->gpuva.flags |= XE_VMA_PTE_COMPACT; - flags |= XE_PDE_64K; - xe_child->is_compact = true; - } - - pte = vm->pt_ops->pde_encode_bo(xe_child->bo, 0, pat_index) | flags; - ret = xe_pt_insert_entry(xe_walk, xe_parent, offset, xe_child, - pte); - } - - *action = ACTION_SUBTREE; - return ret; -} - -static const struct xe_pt_walk_ops xe_pt_stage_bind_ops = { - .pt_entry = xe_pt_stage_bind_entry, -}; - -/** - * xe_pt_stage_bind() - Build a disconnected page-table tree for a given address - * range. - * @tile: The tile we're building for. - * @vma: The vma indicating the address range. - * @entries: Storage for the update entries used for connecting the tree to - * the main tree at commit time. - * @num_entries: On output contains the number of @entries used. - * - * This function builds a disconnected page-table tree for a given address - * range. The tree is connected to the main vm tree for the gpu using - * xe_migrate_update_pgtables() and for the cpu using xe_pt_commit_bind(). - * The function builds xe_vm_pgtable_update structures for already existing - * shared page-tables, and non-existing shared and non-shared page-tables - * are built and populated directly. - * - * Return 0 on success, negative error code on error. - */ -static int -xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, u32 *num_entries) -{ - struct xe_device *xe = tile_to_xe(tile); - struct xe_bo *bo = xe_vma_bo(vma); - bool is_devmem = !xe_vma_is_userptr(vma) && bo && - (xe_bo_is_vram(bo) || xe_bo_is_stolen_devmem(bo)); - struct xe_res_cursor curs; - struct xe_pt_stage_bind_walk xe_walk = { - .base = { - .ops = &xe_pt_stage_bind_ops, - .shifts = xe_normal_pt_shifts, - .max_level = XE_PT_HIGHEST_LEVEL, - }, - .vm = xe_vma_vm(vma), - .tile = tile, - .curs = &curs, - .va_curs_start = xe_vma_start(vma), - .vma = vma, - .wupd.entries = entries, - .needs_64K = (xe_vma_vm(vma)->flags & XE_VM_FLAG_64K) && is_devmem, - }; - struct xe_pt *pt = xe_vma_vm(vma)->pt_root[tile->id]; - int ret; - - /** - * Default atomic expectations for different allocation scenarios are as follows: - * - * 1. Traditional API: When the VM is not in LR mode: - * - Device atomics are expected to function with all allocations. - * - * 2. Compute/SVM API: When the VM is in LR mode: - * - Device atomics are the default behavior when the bo is placed in a single region. - * - In all other cases device atomics will be disabled with AE=0 until an application - * request differently using a ioctl like madvise. - */ - if (vma->gpuva.flags & XE_VMA_ATOMIC_PTE_BIT) { - if (xe_vm_in_lr_mode(xe_vma_vm(vma))) { - if (bo && xe_bo_has_single_placement(bo)) - xe_walk.default_pte |= XE_USM_PPGTT_PTE_AE; - /** - * If a SMEM+LMEM allocation is backed by SMEM, a device - * atomics will cause a gpu page fault and which then - * gets migrated to LMEM, bind such allocations with - * device atomics enabled. - */ - else if (is_devmem && !xe_bo_has_single_placement(bo)) - xe_walk.default_pte |= XE_USM_PPGTT_PTE_AE; - } else { - xe_walk.default_pte |= XE_USM_PPGTT_PTE_AE; - } - - /** - * Unset AE if the platform(PVC) doesn't support it on an - * allocation - */ - if (!xe->info.has_device_atomics_on_smem && !is_devmem) - xe_walk.default_pte &= ~XE_USM_PPGTT_PTE_AE; - } - - if (is_devmem) { - xe_walk.default_pte |= XE_PPGTT_PTE_DM; - xe_walk.dma_offset = vram_region_gpu_offset(bo->ttm.resource); - } - - if (!xe_vma_has_no_bo(vma) && xe_bo_is_stolen(bo)) - xe_walk.dma_offset = xe_ttm_stolen_gpu_offset(xe_bo_device(bo)); - - xe_bo_assert_held(bo); - - if (!xe_vma_is_null(vma)) { - if (xe_vma_is_userptr(vma)) - xe_res_first_sg(to_userptr_vma(vma)->userptr.sg, 0, - xe_vma_size(vma), &curs); - else if (xe_bo_is_vram(bo) || xe_bo_is_stolen(bo)) - xe_res_first(bo->ttm.resource, xe_vma_bo_offset(vma), - xe_vma_size(vma), &curs); - else - xe_res_first_sg(xe_bo_sg(bo), xe_vma_bo_offset(vma), - xe_vma_size(vma), &curs); - } else { - curs.size = xe_vma_size(vma); - } - - ret = xe_pt_walk_range(&pt->base, pt->level, xe_vma_start(vma), - xe_vma_end(vma), &xe_walk.base); - - *num_entries = xe_walk.wupd.num_used_entries; - return ret; -} - -/** - * xe_pt_nonshared_offsets() - Determine the non-shared entry offsets of a - * shared pagetable. - * @addr: The start address within the non-shared pagetable. - * @end: The end address within the non-shared pagetable. - * @level: The level of the non-shared pagetable. - * @walk: Walk info. The function adjusts the walk action. - * @action: next action to perform (see enum page_walk_action) - * @offset: Ignored on input, First non-shared entry on output. - * @end_offset: Ignored on input, Last non-shared entry + 1 on output. - * - * A non-shared page-table has some entries that belong to the address range - * and others that don't. This function determines the entries that belong - * fully to the address range. Depending on level, some entries may - * partially belong to the address range (that can't happen at level 0). - * The function detects that and adjust those offsets to not include those - * partial entries. Iff it does detect partial entries, we know that there must - * be shared page tables also at lower levels, so it adjusts the walk action - * accordingly. - * - * Return: true if there were non-shared entries, false otherwise. - */ -static bool xe_pt_nonshared_offsets(u64 addr, u64 end, unsigned int level, - struct xe_pt_walk *walk, - enum page_walk_action *action, - pgoff_t *offset, pgoff_t *end_offset) -{ - u64 size = 1ull << walk->shifts[level]; - - *offset = xe_pt_offset(addr, level, walk); - *end_offset = xe_pt_num_entries(addr, end, level, walk) + *offset; - - if (!level) - return true; - - /* - * If addr or next are not size aligned, there are shared pts at lower - * level, so in that case traverse down the subtree - */ - *action = ACTION_CONTINUE; - if (!IS_ALIGNED(addr, size)) { - *action = ACTION_SUBTREE; - (*offset)++; - } - - if (!IS_ALIGNED(end, size)) { - *action = ACTION_SUBTREE; - (*end_offset)--; - } - - return *end_offset > *offset; -} - -struct xe_pt_zap_ptes_walk { - /** @base: The walk base-class */ - struct xe_pt_walk base; - - /* Input parameters for the walk */ - /** @tile: The tile we're building for */ - struct xe_tile *tile; - - /* Output */ - /** @needs_invalidate: Whether we need to invalidate TLB*/ - bool needs_invalidate; -}; - -static int xe_pt_zap_ptes_entry(struct xe_ptw *parent, pgoff_t offset, - unsigned int level, u64 addr, u64 next, - struct xe_ptw **child, - enum page_walk_action *action, - struct xe_pt_walk *walk) -{ - struct xe_pt_zap_ptes_walk *xe_walk = - container_of(walk, typeof(*xe_walk), base); - struct xe_pt *xe_child = container_of(*child, typeof(*xe_child), base); - pgoff_t end_offset; - - XE_WARN_ON(!*child); - XE_WARN_ON(!level); - - /* - * Note that we're called from an entry callback, and we're dealing - * with the child of that entry rather than the parent, so need to - * adjust level down. - */ - if (xe_pt_nonshared_offsets(addr, next, --level, walk, action, &offset, - &end_offset)) { - xe_map_memset(tile_to_xe(xe_walk->tile), &xe_child->bo->vmap, - offset * sizeof(u64), 0, - (end_offset - offset) * sizeof(u64)); - xe_walk->needs_invalidate = true; - } - - return 0; -} - -static const struct xe_pt_walk_ops xe_pt_zap_ptes_ops = { - .pt_entry = xe_pt_zap_ptes_entry, -}; - -/** - * xe_pt_zap_ptes() - Zap (zero) gpu ptes of an address range - * @tile: The tile we're zapping for. - * @vma: GPU VMA detailing address range. - * - * Eviction and Userptr invalidation needs to be able to zap the - * gpu ptes of a given address range in pagefaulting mode. - * In order to be able to do that, that function needs access to the shared - * page-table entrieaso it can either clear the leaf PTEs or - * clear the pointers to lower-level page-tables. The caller is required - * to hold the necessary locks to ensure neither the page-table connectivity - * nor the page-table entries of the range is updated from under us. - * - * Return: Whether ptes were actually updated and a TLB invalidation is - * required. - */ -bool xe_pt_zap_ptes(struct xe_tile *tile, struct xe_vma *vma) -{ - struct xe_pt_zap_ptes_walk xe_walk = { - .base = { - .ops = &xe_pt_zap_ptes_ops, - .shifts = xe_normal_pt_shifts, - .max_level = XE_PT_HIGHEST_LEVEL, - }, - .tile = tile, - }; - struct xe_pt *pt = xe_vma_vm(vma)->pt_root[tile->id]; - u8 pt_mask = (vma->tile_present & ~vma->tile_invalidated); - - if (!(pt_mask & BIT(tile->id))) - return false; - - (void)xe_pt_walk_shared(&pt->base, pt->level, xe_vma_start(vma), - xe_vma_end(vma), &xe_walk.base); - - return xe_walk.needs_invalidate; -} - -static void -xe_vm_populate_pgtable(struct xe_migrate_pt_update *pt_update, struct xe_tile *tile, - struct iosys_map *map, void *data, - u32 qword_ofs, u32 num_qwords, - const struct xe_vm_pgtable_update *update) -{ - struct xe_pt_entry *ptes = update->pt_entries; - u64 *ptr = data; - u32 i; - - for (i = 0; i < num_qwords; i++) { - if (map) - xe_map_wr(tile_to_xe(tile), map, (qword_ofs + i) * - sizeof(u64), u64, ptes[i].pte); - else - ptr[i] = ptes[i].pte; - } -} - -static void xe_pt_abort_bind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, - u32 num_entries) -{ - u32 i, j; - - for (i = 0; i < num_entries; i++) { - if (!entries[i].pt_entries) - continue; - - for (j = 0; j < entries[i].qwords; j++) - xe_pt_destroy(entries[i].pt_entries[j].pt, xe_vma_vm(vma)->flags, NULL); - kfree(entries[i].pt_entries); - } -} - -static void xe_pt_commit_locks_assert(struct xe_vma *vma) -{ - struct xe_vm *vm = xe_vma_vm(vma); - - lockdep_assert_held(&vm->lock); - - if (!xe_vma_is_userptr(vma) && !xe_vma_is_null(vma)) - dma_resv_assert_held(xe_vma_bo(vma)->ttm.base.resv); - - xe_vm_assert_held(vm); -} - -static void xe_pt_commit_bind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, - u32 num_entries, bool rebind, - struct llist_head *deferred) -{ - u32 i, j; - - xe_pt_commit_locks_assert(vma); - - for (i = 0; i < num_entries; i++) { - struct xe_pt *pt = entries[i].pt; - struct xe_pt_dir *pt_dir; - - if (!rebind) - pt->num_live += entries[i].qwords; - - if (!pt->level) - continue; - - pt_dir = as_xe_pt_dir(pt); - for (j = 0; j < entries[i].qwords; j++) { - u32 j_ = j + entries[i].ofs; - struct xe_pt *newpte = entries[i].pt_entries[j].pt; - - if (xe_pt_entry(pt_dir, j_)) - xe_pt_destroy(xe_pt_entry(pt_dir, j_), - xe_vma_vm(vma)->flags, deferred); - - pt_dir->children[j_] = &newpte->base; - } - } -} - -static void xe_pt_free_bind(struct xe_vm_pgtable_update *entries, - u32 num_entries) -{ - u32 i; - - for (i = 0; i < num_entries; i++) - kfree(entries[i].pt_entries); -} - -static int -xe_pt_prepare_bind(struct xe_tile *tile, struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, u32 *num_entries) -{ - int err; - - *num_entries = 0; - err = xe_pt_stage_bind(tile, vma, entries, num_entries); - if (!err) - xe_tile_assert(tile, *num_entries); - else /* abort! */ - xe_pt_abort_bind(vma, entries, *num_entries); - - return err; -} - -static void xe_vm_dbg_print_entries(struct xe_device *xe, - const struct xe_vm_pgtable_update *entries, - unsigned int num_entries, bool bind) -#if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM)) -{ - unsigned int i; - - vm_dbg(&xe->drm, "%s: %u entries to update\n", bind ? "bind" : "unbind", - num_entries); - for (i = 0; i < num_entries; i++) { - const struct xe_vm_pgtable_update *entry = &entries[i]; - struct xe_pt *xe_pt = entry->pt; - u64 page_size = 1ull << xe_pt_shift(xe_pt->level); - u64 end; - u64 start; - - xe_assert(xe, !entry->pt->is_compact); - start = entry->ofs * page_size; - end = start + page_size * entry->qwords; - vm_dbg(&xe->drm, - "\t%u: Update level %u at (%u + %u) [%llx...%llx) f:%x\n", - i, xe_pt->level, entry->ofs, entry->qwords, - xe_pt_addr(xe_pt) + start, xe_pt_addr(xe_pt) + end, 0); - } -} -#else -{} -#endif - -static bool no_in_syncs(struct xe_sync_entry *syncs, u32 num_syncs) -{ - int i; - - for (i = 0; i < num_syncs; i++) { - struct dma_fence *fence = syncs[i].fence; - - if (fence && !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, - &fence->flags)) - return false; - } - - return true; -} - -static int job_test_add_deps(struct xe_sched_job *job, - struct dma_resv *resv, - enum dma_resv_usage usage) -{ - if (!job) { - if (!dma_resv_test_signaled(resv, usage)) - return -ETIME; - - return 0; - } - - return xe_sched_job_add_deps(job, resv, usage); -} - -static int vma_add_deps(struct xe_vma *vma, struct xe_sched_job *job) -{ - struct xe_bo *bo = xe_vma_bo(vma); - - xe_bo_assert_held(bo); - - if (bo && !bo->vm) - return job_test_add_deps(job, bo->ttm.base.resv, - DMA_RESV_USAGE_KERNEL); - - return 0; -} - -static int op_add_deps(struct xe_vm *vm, struct xe_vma_op *op, - struct xe_sched_job *job) -{ - int err = 0; - - switch (op->base.op) { - case DRM_GPUVA_OP_MAP: - if (!op->map.immediate && xe_vm_in_fault_mode(vm)) - break; - - err = vma_add_deps(op->map.vma, job); - break; - case DRM_GPUVA_OP_REMAP: - if (op->remap.prev) - err = vma_add_deps(op->remap.prev, job); - if (!err && op->remap.next) - err = vma_add_deps(op->remap.next, job); - break; - case DRM_GPUVA_OP_UNMAP: - break; - case DRM_GPUVA_OP_PREFETCH: - err = vma_add_deps(gpuva_to_vma(op->base.prefetch.va), job); - break; - default: - drm_warn(&vm->xe->drm, "NOT POSSIBLE"); - } - - return err; -} - -static int xe_pt_vm_dependencies(struct xe_sched_job *job, - struct xe_vm *vm, - struct xe_vma_ops *vops, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_range_fence_tree *rftree) -{ - struct xe_range_fence *rtfence; - struct dma_fence *fence; - struct xe_vma_op *op; - int err = 0, i; - - xe_vm_assert_held(vm); - - if (!job && !no_in_syncs(vops->syncs, vops->num_syncs)) - return -ETIME; - - if (!job && !xe_exec_queue_is_idle(pt_update_ops->q)) - return -ETIME; - - if (pt_update_ops->wait_vm_bookkeep || pt_update_ops->wait_vm_kernel) { - err = job_test_add_deps(job, xe_vm_resv(vm), - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_BOOKKEEP : - DMA_RESV_USAGE_KERNEL); - if (err) - return err; - } - - rtfence = xe_range_fence_tree_first(rftree, pt_update_ops->start, - pt_update_ops->last); - while (rtfence) { - fence = rtfence->fence; - - if (!dma_fence_is_signaled(fence)) { - /* - * Is this a CPU update? GPU is busy updating, so return - * an error - */ - if (!job) - return -ETIME; - - dma_fence_get(fence); - err = drm_sched_job_add_dependency(&job->drm, fence); - if (err) - return err; - } - - rtfence = xe_range_fence_tree_next(rtfence, - pt_update_ops->start, - pt_update_ops->last); - } - - list_for_each_entry(op, &vops->list, link) { - err = op_add_deps(vm, op, job); - if (err) - return err; - } - - if (job) - err = xe_sched_job_last_fence_add_dep(job, vm); - else - err = xe_exec_queue_last_fence_test_dep(pt_update_ops->q, vm); - - for (i = 0; job && !err && i < vops->num_syncs; i++) - err = xe_sync_entry_add_deps(&vops->syncs[i], job); - - return err; -} - -static int xe_pt_pre_commit(struct xe_migrate_pt_update *pt_update) -{ - struct xe_vma_ops *vops = pt_update->vops; - struct xe_vm *vm = vops->vm; - struct xe_range_fence_tree *rftree = &vm->rftree[pt_update->tile_id]; - struct xe_vm_pgtable_update_ops *pt_update_ops = - &vops->pt_update_ops[pt_update->tile_id]; - - return xe_pt_vm_dependencies(pt_update->job, vm, pt_update->vops, - pt_update_ops, rftree); -} - -#ifdef CONFIG_DRM_XE_USERPTR_INVAL_INJECT - -static bool xe_pt_userptr_inject_eagain(struct xe_userptr_vma *uvma) -{ - u32 divisor = uvma->userptr.divisor ? uvma->userptr.divisor : 2; - static u32 count; - - if (count++ % divisor == divisor - 1) { - uvma->userptr.divisor = divisor << 1; - return true; - } - - return false; -} - -#else - -static bool xe_pt_userptr_inject_eagain(struct xe_userptr_vma *uvma) -{ - return false; -} - -#endif - -static int vma_check_userptr(struct xe_vm *vm, struct xe_vma *vma, - struct xe_vm_pgtable_update_ops *pt_update) -{ - struct xe_userptr_vma *uvma; - unsigned long notifier_seq; - - lockdep_assert_held_read(&vm->userptr.notifier_lock); - - if (!xe_vma_is_userptr(vma)) - return 0; - - uvma = to_userptr_vma(vma); - notifier_seq = uvma->userptr.notifier_seq; - - if (uvma->userptr.initial_bind && !xe_vm_in_fault_mode(vm)) - return 0; - - if (!mmu_interval_read_retry(&uvma->userptr.notifier, - notifier_seq) && - !xe_pt_userptr_inject_eagain(uvma)) - return 0; - - if (xe_vm_in_fault_mode(vm)) { - return -EAGAIN; - } else { - spin_lock(&vm->userptr.invalidated_lock); - list_move_tail(&uvma->userptr.invalidate_link, - &vm->userptr.invalidated); - spin_unlock(&vm->userptr.invalidated_lock); - - if (xe_vm_in_preempt_fence_mode(vm)) { - struct dma_resv_iter cursor; - struct dma_fence *fence; - long err; - - dma_resv_iter_begin(&cursor, xe_vm_resv(vm), - DMA_RESV_USAGE_BOOKKEEP); - dma_resv_for_each_fence_unlocked(&cursor, fence) - dma_fence_enable_sw_signaling(fence); - dma_resv_iter_end(&cursor); - - err = dma_resv_wait_timeout(xe_vm_resv(vm), - DMA_RESV_USAGE_BOOKKEEP, - false, MAX_SCHEDULE_TIMEOUT); - XE_WARN_ON(err <= 0); - } - } - - return 0; -} - -static int op_check_userptr(struct xe_vm *vm, struct xe_vma_op *op, - struct xe_vm_pgtable_update_ops *pt_update) -{ - int err = 0; - - lockdep_assert_held_read(&vm->userptr.notifier_lock); - - switch (op->base.op) { - case DRM_GPUVA_OP_MAP: - if (!op->map.immediate && xe_vm_in_fault_mode(vm)) - break; - - err = vma_check_userptr(vm, op->map.vma, pt_update); - break; - case DRM_GPUVA_OP_REMAP: - if (op->remap.prev) - err = vma_check_userptr(vm, op->remap.prev, pt_update); - if (!err && op->remap.next) - err = vma_check_userptr(vm, op->remap.next, pt_update); - break; - case DRM_GPUVA_OP_UNMAP: - break; - case DRM_GPUVA_OP_PREFETCH: - err = vma_check_userptr(vm, gpuva_to_vma(op->base.prefetch.va), - pt_update); - break; - default: - drm_warn(&vm->xe->drm, "NOT POSSIBLE"); - } - - return err; -} - -static int xe_pt_userptr_pre_commit(struct xe_migrate_pt_update *pt_update) -{ - struct xe_vm *vm = pt_update->vops->vm; - struct xe_vma_ops *vops = pt_update->vops; - struct xe_vm_pgtable_update_ops *pt_update_ops = - &vops->pt_update_ops[pt_update->tile_id]; - struct xe_vma_op *op; - int err; - - err = xe_pt_pre_commit(pt_update); - if (err) - return err; - - down_read(&vm->userptr.notifier_lock); - - list_for_each_entry(op, &vops->list, link) { - err = op_check_userptr(vm, op, pt_update_ops); - if (err) { - up_read(&vm->userptr.notifier_lock); - break; - } - } - - return err; -} - -struct invalidation_fence { - struct xe_gt_tlb_invalidation_fence base; - struct xe_gt *gt; - struct dma_fence *fence; - struct dma_fence_cb cb; - struct work_struct work; - u64 start; - u64 end; - u32 asid; -}; - -static void invalidation_fence_cb(struct dma_fence *fence, - struct dma_fence_cb *cb) -{ - struct invalidation_fence *ifence = - container_of(cb, struct invalidation_fence, cb); - struct xe_device *xe = gt_to_xe(ifence->gt); - - trace_xe_gt_tlb_invalidation_fence_cb(xe, &ifence->base); - if (!ifence->fence->error) { - queue_work(system_wq, &ifence->work); - } else { - ifence->base.base.error = ifence->fence->error; - dma_fence_signal(&ifence->base.base); - dma_fence_put(&ifence->base.base); - } - dma_fence_put(ifence->fence); -} - -static void invalidation_fence_work_func(struct work_struct *w) -{ - struct invalidation_fence *ifence = - container_of(w, struct invalidation_fence, work); - struct xe_device *xe = gt_to_xe(ifence->gt); - - trace_xe_gt_tlb_invalidation_fence_work_func(xe, &ifence->base); - xe_gt_tlb_invalidation_range(ifence->gt, &ifence->base, ifence->start, - ifence->end, ifence->asid); -} - -static int invalidation_fence_init(struct xe_gt *gt, - struct invalidation_fence *ifence, - struct dma_fence *fence, - u64 start, u64 end, u32 asid) -{ - int ret; - - trace_xe_gt_tlb_invalidation_fence_create(gt_to_xe(gt), &ifence->base); - - xe_gt_tlb_invalidation_fence_init(gt, &ifence->base, false); - - ifence->fence = fence; - ifence->gt = gt; - ifence->start = start; - ifence->end = end; - ifence->asid = asid; - - INIT_WORK(&ifence->work, invalidation_fence_work_func); - ret = dma_fence_add_callback(fence, &ifence->cb, invalidation_fence_cb); - if (ret == -ENOENT) { - dma_fence_put(ifence->fence); /* Usually dropped in CB */ - invalidation_fence_work_func(&ifence->work); - } else if (ret) { - dma_fence_put(&ifence->base.base); /* Caller ref */ - dma_fence_put(&ifence->base.base); /* Creation ref */ - } - - xe_gt_assert(gt, !ret || ret == -ENOENT); - - return ret && ret != -ENOENT ? ret : 0; -} - -struct xe_pt_stage_unbind_walk { - /** @base: The pagewalk base-class. */ - struct xe_pt_walk base; - - /* Input parameters for the walk */ - /** @tile: The tile we're unbinding from. */ - struct xe_tile *tile; - - /** - * @modified_start: Walk range start, modified to include any - * shared pagetables that we're the only user of and can thus - * treat as private. - */ - u64 modified_start; - /** @modified_end: Walk range start, modified like @modified_start. */ - u64 modified_end; - - /* Output */ - /* @wupd: Structure to track the page-table updates we're building */ - struct xe_walk_update wupd; -}; - -/* - * Check whether this range is the only one populating this pagetable, - * and in that case, update the walk range checks so that higher levels don't - * view us as a shared pagetable. - */ -static bool xe_pt_check_kill(u64 addr, u64 next, unsigned int level, - const struct xe_pt *child, - enum page_walk_action *action, - struct xe_pt_walk *walk) -{ - struct xe_pt_stage_unbind_walk *xe_walk = - container_of(walk, typeof(*xe_walk), base); - unsigned int shift = walk->shifts[level]; - u64 size = 1ull << shift; - - if (IS_ALIGNED(addr, size) && IS_ALIGNED(next, size) && - ((next - addr) >> shift) == child->num_live) { - u64 size = 1ull << walk->shifts[level + 1]; - - *action = ACTION_CONTINUE; - - if (xe_walk->modified_start >= addr) - xe_walk->modified_start = round_down(addr, size); - if (xe_walk->modified_end <= next) - xe_walk->modified_end = round_up(next, size); - - return true; - } - - return false; -} - -static int xe_pt_stage_unbind_entry(struct xe_ptw *parent, pgoff_t offset, - unsigned int level, u64 addr, u64 next, - struct xe_ptw **child, - enum page_walk_action *action, - struct xe_pt_walk *walk) -{ - struct xe_pt *xe_child = container_of(*child, typeof(*xe_child), base); - - XE_WARN_ON(!*child); - XE_WARN_ON(!level); - - xe_pt_check_kill(addr, next, level - 1, xe_child, action, walk); - - return 0; -} - -static int -xe_pt_stage_unbind_post_descend(struct xe_ptw *parent, pgoff_t offset, - unsigned int level, u64 addr, u64 next, - struct xe_ptw **child, - enum page_walk_action *action, - struct xe_pt_walk *walk) -{ - struct xe_pt_stage_unbind_walk *xe_walk = - container_of(walk, typeof(*xe_walk), base); - struct xe_pt *xe_child = container_of(*child, typeof(*xe_child), base); - pgoff_t end_offset; - u64 size = 1ull << walk->shifts[--level]; - - if (!IS_ALIGNED(addr, size)) - addr = xe_walk->modified_start; - if (!IS_ALIGNED(next, size)) - next = xe_walk->modified_end; - - /* Parent == *child is the root pt. Don't kill it. */ - if (parent != *child && - xe_pt_check_kill(addr, next, level, xe_child, action, walk)) - return 0; - - if (!xe_pt_nonshared_offsets(addr, next, level, walk, action, &offset, - &end_offset)) - return 0; - - (void)xe_pt_new_shared(&xe_walk->wupd, xe_child, offset, false); - xe_walk->wupd.updates[level].update->qwords = end_offset - offset; - - return 0; -} - -static const struct xe_pt_walk_ops xe_pt_stage_unbind_ops = { - .pt_entry = xe_pt_stage_unbind_entry, - .pt_post_descend = xe_pt_stage_unbind_post_descend, -}; - -/** - * xe_pt_stage_unbind() - Build page-table update structures for an unbind - * operation - * @tile: The tile we're unbinding for. - * @vma: The vma we're unbinding. - * @entries: Caller-provided storage for the update structures. - * - * Builds page-table update structures for an unbind operation. The function - * will attempt to remove all page-tables that we're the only user - * of, and for that to work, the unbind operation must be committed in the - * same critical section that blocks racing binds to the same page-table tree. - * - * Return: The number of entries used. - */ -static unsigned int xe_pt_stage_unbind(struct xe_tile *tile, struct xe_vma *vma, - struct xe_vm_pgtable_update *entries) -{ - struct xe_pt_stage_unbind_walk xe_walk = { - .base = { - .ops = &xe_pt_stage_unbind_ops, - .shifts = xe_normal_pt_shifts, - .max_level = XE_PT_HIGHEST_LEVEL, - }, - .tile = tile, - .modified_start = xe_vma_start(vma), - .modified_end = xe_vma_end(vma), - .wupd.entries = entries, - }; - struct xe_pt *pt = xe_vma_vm(vma)->pt_root[tile->id]; - - (void)xe_pt_walk_shared(&pt->base, pt->level, xe_vma_start(vma), - xe_vma_end(vma), &xe_walk.base); - - return xe_walk.wupd.num_used_entries; -} - -static void -xe_migrate_clear_pgtable_callback(struct xe_migrate_pt_update *pt_update, - struct xe_tile *tile, struct iosys_map *map, - void *ptr, u32 qword_ofs, u32 num_qwords, - const struct xe_vm_pgtable_update *update) -{ - struct xe_vm *vm = pt_update->vops->vm; - u64 empty = __xe_pt_empty_pte(tile, vm, update->pt->level); - int i; - - if (map && map->is_iomem) - for (i = 0; i < num_qwords; ++i) - xe_map_wr(tile_to_xe(tile), map, (qword_ofs + i) * - sizeof(u64), u64, empty); - else if (map) - memset64(map->vaddr + qword_ofs * sizeof(u64), empty, - num_qwords); - else - memset64(ptr, empty, num_qwords); -} - -static void -xe_pt_commit_unbind(struct xe_vma *vma, - struct xe_vm_pgtable_update *entries, u32 num_entries, - struct llist_head *deferred) -{ - u32 j; - - xe_pt_commit_locks_assert(vma); - - for (j = 0; j < num_entries; ++j) { - struct xe_vm_pgtable_update *entry = &entries[j]; - struct xe_pt *pt = entry->pt; - - pt->num_live -= entry->qwords; - if (pt->level) { - struct xe_pt_dir *pt_dir = as_xe_pt_dir(pt); - u32 i; - - for (i = entry->ofs; i < entry->ofs + entry->qwords; - i++) { - if (xe_pt_entry(pt_dir, i)) - xe_pt_destroy(xe_pt_entry(pt_dir, i), - xe_vma_vm(vma)->flags, deferred); - - pt_dir->children[i] = NULL; - } - } - } -} - -static void -xe_pt_update_ops_rfence_interval(struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma *vma) -{ - u32 current_op = pt_update_ops->current_op; - struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[current_op]; - int i, level = 0; - u64 start, last; - - for (i = 0; i < pt_op->num_entries; i++) { - const struct xe_vm_pgtable_update *entry = &pt_op->entries[i]; - - if (entry->pt->level > level) - level = entry->pt->level; - } - - /* Greedy (non-optimal) calculation but simple */ - start = ALIGN_DOWN(xe_vma_start(vma), 0x1ull << xe_pt_shift(level)); - last = ALIGN(xe_vma_end(vma), 0x1ull << xe_pt_shift(level)) - 1; - - if (start < pt_update_ops->start) - pt_update_ops->start = start; - if (last > pt_update_ops->last) - pt_update_ops->last = last; -} - -static int vma_reserve_fences(struct xe_device *xe, struct xe_vma *vma) -{ - int shift = xe_device_get_root_tile(xe)->media_gt ? 1 : 0; - - if (!xe_vma_has_no_bo(vma) && !xe_vma_bo(vma)->vm) - return dma_resv_reserve_fences(xe_vma_bo(vma)->ttm.base.resv, - xe->info.tile_count << shift); - - return 0; -} - -static int bind_op_prepare(struct xe_vm *vm, struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma *vma) -{ - u32 current_op = pt_update_ops->current_op; - struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[current_op]; - struct llist_head *deferred = &pt_update_ops->deferred; - int err; - - xe_bo_assert_held(xe_vma_bo(vma)); - - vm_dbg(&xe_vma_vm(vma)->xe->drm, - "Preparing bind, with range [%llx...%llx)\n", - xe_vma_start(vma), xe_vma_end(vma) - 1); - - pt_op->vma = NULL; - pt_op->bind = true; - pt_op->rebind = BIT(tile->id) & vma->tile_present; - - err = vma_reserve_fences(tile_to_xe(tile), vma); - if (err) - return err; - - err = xe_pt_prepare_bind(tile, vma, pt_op->entries, - &pt_op->num_entries); - if (!err) { - xe_tile_assert(tile, pt_op->num_entries <= - ARRAY_SIZE(pt_op->entries)); - xe_vm_dbg_print_entries(tile_to_xe(tile), pt_op->entries, - pt_op->num_entries, true); - - xe_pt_update_ops_rfence_interval(pt_update_ops, vma); - ++pt_update_ops->current_op; - pt_update_ops->needs_userptr_lock |= xe_vma_is_userptr(vma); - - /* - * If rebind, we have to invalidate TLB on !LR vms to invalidate - * cached PTEs point to freed memory. On LR vms this is done - * automatically when the context is re-enabled by the rebind worker, - * or in fault mode it was invalidated on PTE zapping. - * - * If !rebind, and scratch enabled VMs, there is a chance the scratch - * PTE is already cached in the TLB so it needs to be invalidated. - * On !LR VMs this is done in the ring ops preceding a batch, but on - * non-faulting LR, in particular on user-space batch buffer chaining, - * it needs to be done here. - */ - if ((!pt_op->rebind && xe_vm_has_scratch(vm) && - xe_vm_in_preempt_fence_mode(vm))) - pt_update_ops->needs_invalidation = true; - else if (pt_op->rebind && !xe_vm_in_lr_mode(vm)) - /* We bump also if batch_invalidate_tlb is true */ - vm->tlb_flush_seqno++; - - /* FIXME: Don't commit right away */ - vma->tile_staged |= BIT(tile->id); - pt_op->vma = vma; - xe_pt_commit_bind(vma, pt_op->entries, pt_op->num_entries, - pt_op->rebind, deferred); - } - - return err; -} - -static int unbind_op_prepare(struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma *vma) -{ - u32 current_op = pt_update_ops->current_op; - struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[current_op]; - struct llist_head *deferred = &pt_update_ops->deferred; - int err; - - if (!((vma->tile_present | vma->tile_staged) & BIT(tile->id))) - return 0; - - xe_bo_assert_held(xe_vma_bo(vma)); - - vm_dbg(&xe_vma_vm(vma)->xe->drm, - "Preparing unbind, with range [%llx...%llx)\n", - xe_vma_start(vma), xe_vma_end(vma) - 1); - - /* - * Wait for invalidation to complete. Can corrupt internal page table - * state if an invalidation is running while preparing an unbind. - */ - if (xe_vma_is_userptr(vma) && xe_vm_in_fault_mode(xe_vma_vm(vma))) - mmu_interval_read_begin(&to_userptr_vma(vma)->userptr.notifier); - - pt_op->vma = vma; - pt_op->bind = false; - pt_op->rebind = false; - - err = vma_reserve_fences(tile_to_xe(tile), vma); - if (err) - return err; - - pt_op->num_entries = xe_pt_stage_unbind(tile, vma, pt_op->entries); - - xe_vm_dbg_print_entries(tile_to_xe(tile), pt_op->entries, - pt_op->num_entries, false); - xe_pt_update_ops_rfence_interval(pt_update_ops, vma); - ++pt_update_ops->current_op; - pt_update_ops->needs_userptr_lock |= xe_vma_is_userptr(vma); - pt_update_ops->needs_invalidation = true; - - /* FIXME: Don't commit right away */ - xe_pt_commit_unbind(vma, pt_op->entries, pt_op->num_entries, - deferred); - - return 0; -} - -static int op_prepare(struct xe_vm *vm, - struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma_op *op) -{ - int err = 0; - - xe_vm_assert_held(vm); - - switch (op->base.op) { - case DRM_GPUVA_OP_MAP: - if (!op->map.immediate && xe_vm_in_fault_mode(vm)) - break; - - err = bind_op_prepare(vm, tile, pt_update_ops, op->map.vma); - pt_update_ops->wait_vm_kernel = true; - break; - case DRM_GPUVA_OP_REMAP: - err = unbind_op_prepare(tile, pt_update_ops, - gpuva_to_vma(op->base.remap.unmap->va)); - - if (!err && op->remap.prev) { - err = bind_op_prepare(vm, tile, pt_update_ops, - op->remap.prev); - pt_update_ops->wait_vm_bookkeep = true; - } - if (!err && op->remap.next) { - err = bind_op_prepare(vm, tile, pt_update_ops, - op->remap.next); - pt_update_ops->wait_vm_bookkeep = true; - } - break; - case DRM_GPUVA_OP_UNMAP: - err = unbind_op_prepare(tile, pt_update_ops, - gpuva_to_vma(op->base.unmap.va)); - break; - case DRM_GPUVA_OP_PREFETCH: - err = bind_op_prepare(vm, tile, pt_update_ops, - gpuva_to_vma(op->base.prefetch.va)); - pt_update_ops->wait_vm_kernel = true; - break; - default: - drm_warn(&vm->xe->drm, "NOT POSSIBLE"); - } - - return err; -} - -static void -xe_pt_update_ops_init(struct xe_vm_pgtable_update_ops *pt_update_ops) -{ - init_llist_head(&pt_update_ops->deferred); - pt_update_ops->start = ~0x0ull; - pt_update_ops->last = 0x0ull; -} - -/** - * xe_pt_update_ops_prepare() - Prepare PT update operations - * @tile: Tile of PT update operations - * @vops: VMA operationa - * - * Prepare PT update operations which includes updating internal PT state, - * allocate memory for page tables, populate page table being pruned in, and - * create PT update operations for leaf insertion / removal. - * - * Return: 0 on success, negative error code on error. - */ -int xe_pt_update_ops_prepare(struct xe_tile *tile, struct xe_vma_ops *vops) -{ - struct xe_vm_pgtable_update_ops *pt_update_ops = - &vops->pt_update_ops[tile->id]; - struct xe_vma_op *op; - int shift = tile->media_gt ? 1 : 0; - int err; - - lockdep_assert_held(&vops->vm->lock); - xe_vm_assert_held(vops->vm); - - xe_pt_update_ops_init(pt_update_ops); - - err = dma_resv_reserve_fences(xe_vm_resv(vops->vm), - tile_to_xe(tile)->info.tile_count << shift); - if (err) - return err; - - list_for_each_entry(op, &vops->list, link) { - err = op_prepare(vops->vm, tile, pt_update_ops, op); - - if (err) - return err; - } - - xe_tile_assert(tile, pt_update_ops->current_op <= - pt_update_ops->num_ops); - -#ifdef TEST_VM_OPS_ERROR - if (vops->inject_error && - vops->vm->xe->vm_inject_error_position == FORCE_OP_ERROR_PREPARE) - return -ENOSPC; -#endif - - return 0; -} - -static void bind_op_commit(struct xe_vm *vm, struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma *vma, struct dma_fence *fence, - struct dma_fence *fence2) -{ - if (!xe_vma_has_no_bo(vma) && !xe_vma_bo(vma)->vm) { - dma_resv_add_fence(xe_vma_bo(vma)->ttm.base.resv, fence, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - if (fence2) - dma_resv_add_fence(xe_vma_bo(vma)->ttm.base.resv, fence2, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - } - vma->tile_present |= BIT(tile->id); - vma->tile_staged &= ~BIT(tile->id); - if (xe_vma_is_userptr(vma)) { - lockdep_assert_held_read(&vm->userptr.notifier_lock); - to_userptr_vma(vma)->userptr.initial_bind = true; - } - - /* - * Kick rebind worker if this bind triggers preempt fences and not in - * the rebind worker - */ - if (pt_update_ops->wait_vm_bookkeep && - xe_vm_in_preempt_fence_mode(vm) && - !current->mm) - xe_vm_queue_rebind_worker(vm); -} - -static void unbind_op_commit(struct xe_vm *vm, struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma *vma, struct dma_fence *fence, - struct dma_fence *fence2) -{ - if (!xe_vma_has_no_bo(vma) && !xe_vma_bo(vma)->vm) { - dma_resv_add_fence(xe_vma_bo(vma)->ttm.base.resv, fence, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - if (fence2) - dma_resv_add_fence(xe_vma_bo(vma)->ttm.base.resv, fence2, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - } - vma->tile_present &= ~BIT(tile->id); - if (!vma->tile_present) { - list_del_init(&vma->combined_links.rebind); - if (xe_vma_is_userptr(vma)) { - lockdep_assert_held_read(&vm->userptr.notifier_lock); - - spin_lock(&vm->userptr.invalidated_lock); - list_del_init(&to_userptr_vma(vma)->userptr.invalidate_link); - spin_unlock(&vm->userptr.invalidated_lock); - } - } -} - -static void op_commit(struct xe_vm *vm, - struct xe_tile *tile, - struct xe_vm_pgtable_update_ops *pt_update_ops, - struct xe_vma_op *op, struct dma_fence *fence, - struct dma_fence *fence2) -{ - xe_vm_assert_held(vm); - - switch (op->base.op) { - case DRM_GPUVA_OP_MAP: - if (!op->map.immediate && xe_vm_in_fault_mode(vm)) - break; - - bind_op_commit(vm, tile, pt_update_ops, op->map.vma, fence, - fence2); - break; - case DRM_GPUVA_OP_REMAP: - unbind_op_commit(vm, tile, pt_update_ops, - gpuva_to_vma(op->base.remap.unmap->va), fence, - fence2); - - if (op->remap.prev) - bind_op_commit(vm, tile, pt_update_ops, op->remap.prev, - fence, fence2); - if (op->remap.next) - bind_op_commit(vm, tile, pt_update_ops, op->remap.next, - fence, fence2); - break; - case DRM_GPUVA_OP_UNMAP: - unbind_op_commit(vm, tile, pt_update_ops, - gpuva_to_vma(op->base.unmap.va), fence, fence2); - break; - case DRM_GPUVA_OP_PREFETCH: - bind_op_commit(vm, tile, pt_update_ops, - gpuva_to_vma(op->base.prefetch.va), fence, fence2); - break; - default: - drm_warn(&vm->xe->drm, "NOT POSSIBLE"); - } -} - -static const struct xe_migrate_pt_update_ops migrate_ops = { - .populate = xe_vm_populate_pgtable, - .clear = xe_migrate_clear_pgtable_callback, - .pre_commit = xe_pt_pre_commit, -}; - -static const struct xe_migrate_pt_update_ops userptr_migrate_ops = { - .populate = xe_vm_populate_pgtable, - .clear = xe_migrate_clear_pgtable_callback, - .pre_commit = xe_pt_userptr_pre_commit, -}; - -/** - * xe_pt_update_ops_run() - Run PT update operations - * @tile: Tile of PT update operations - * @vops: VMA operationa - * - * Run PT update operations which includes committing internal PT state changes, - * creating job for PT update operations for leaf insertion / removal, and - * installing job fence in various places. - * - * Return: fence on success, negative ERR_PTR on error. - */ -struct dma_fence * -xe_pt_update_ops_run(struct xe_tile *tile, struct xe_vma_ops *vops) -{ - struct xe_vm *vm = vops->vm; - struct xe_vm_pgtable_update_ops *pt_update_ops = - &vops->pt_update_ops[tile->id]; - struct dma_fence *fence; - struct invalidation_fence *ifence = NULL, *mfence = NULL; - struct dma_fence **fences = NULL; - struct dma_fence_array *cf = NULL; - struct xe_range_fence *rfence; - struct xe_vma_op *op; - int err = 0; - struct xe_migrate_pt_update update = { - .ops = pt_update_ops->needs_userptr_lock ? - &userptr_migrate_ops : - &migrate_ops, - .vops = vops, - .tile_id = tile->id, - }; - - lockdep_assert_held(&vm->lock); - xe_vm_assert_held(vm); - - if (!pt_update_ops->current_op) { - xe_tile_assert(tile, xe_vm_in_fault_mode(vm)); - - return dma_fence_get_stub(); - } - -#ifdef TEST_VM_OPS_ERROR - if (vops->inject_error && - vm->xe->vm_inject_error_position == FORCE_OP_ERROR_RUN) - return ERR_PTR(-ENOSPC); -#endif - - if (pt_update_ops->needs_invalidation) { - ifence = kzalloc(sizeof(*ifence), GFP_KERNEL); -<<<<<<< - if (!ifence) - return ERR_PTR(-ENOMEM); -======= - if (!ifence) { - err = -ENOMEM; - goto kill_vm_tile1; - } - if (tile->media_gt) { - mfence = kzalloc(sizeof(*ifence), GFP_KERNEL); - if (!mfence) { - err = -ENOMEM; - goto free_ifence; - } - fences = kmalloc_array(2, sizeof(*fences), GFP_KERNEL); - if (!fences) { - err = -ENOMEM; - goto free_ifence; - } - cf = dma_fence_array_alloc(2); - if (!cf) { - err = -ENOMEM; - goto free_ifence; - } - } ->>>>>>> - } - - rfence = kzalloc(sizeof(*rfence), GFP_KERNEL); - if (!rfence) { - err = -ENOMEM; - goto free_ifence; - } - - fence = xe_migrate_update_pgtables(tile->migrate, &update); - if (IS_ERR(fence)) { - err = PTR_ERR(fence); - goto free_rfence; - } - - if (xe_range_fence_insert(&vm->rftree[tile->id], rfence, - &xe_range_fence_kfree_ops, - pt_update_ops->start, - pt_update_ops->last, fence)) - dma_fence_wait(fence, false); - - /* tlb invalidation must be done before signaling rebind */ - if (ifence) { -<<<<<<< - err = invalidation_fence_init(tile->primary_gt, ifence, fence, - pt_update_ops->start, - pt_update_ops->last, - vm->usm.asid); - if (err) - goto put_fence; - fence = &ifence->base.base; -======= - if (mfence) - dma_fence_get(fence); - invalidation_fence_init(tile->primary_gt, ifence, fence, - pt_update_ops->start, - pt_update_ops->last, vm->usm.asid); - if (mfence) { - invalidation_fence_init(tile->media_gt, mfence, fence, - pt_update_ops->start, - pt_update_ops->last, vm->usm.asid); - fences[0] = &ifence->base.base; - fences[1] = &mfence->base.base; - dma_fence_array_init(cf, 2, fences, - vm->composite_fence_ctx, - vm->composite_fence_seqno++, - false); - fence = &cf->base; - } else { - fence = &ifence->base.base; - } ->>>>>>> - } - - if (!mfence) { - dma_resv_add_fence(xe_vm_resv(vm), fence, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - - list_for_each_entry(op, &vops->list, link) - op_commit(vops->vm, tile, pt_update_ops, op, fence, NULL); - } else { - dma_resv_add_fence(xe_vm_resv(vm), &ifence->base.base, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - - dma_resv_add_fence(xe_vm_resv(vm), &mfence->base.base, - pt_update_ops->wait_vm_bookkeep ? - DMA_RESV_USAGE_KERNEL : - DMA_RESV_USAGE_BOOKKEEP); - - list_for_each_entry(op, &vops->list, link) - op_commit(vops->vm, tile, pt_update_ops, op, - &ifence->base.base, &mfence->base.base); - } - - if (pt_update_ops->needs_userptr_lock) - up_read(&vm->userptr.notifier_lock); - - return fence; - -put_fence: - if (pt_update_ops->needs_userptr_lock) - up_read(&vm->userptr.notifier_lock); - dma_fence_put(fence); -free_rfence: - kfree(rfence); -free_ifence: - kfree(cf); - kfree(fences); - kfree(mfence); - kfree(ifence); - - return ERR_PTR(err); -} - -/** - * xe_pt_update_ops_fini() - Finish PT update operations - * @tile: Tile of PT update operations - * @vops: VMA operations - * - * Finish PT update operations by committing to destroy page table memory - */ -void xe_pt_update_ops_fini(struct xe_tile *tile, struct xe_vma_ops *vops) -{ - struct xe_vm_pgtable_update_ops *pt_update_ops = - &vops->pt_update_ops[tile->id]; - int i; - - lockdep_assert_held(&vops->vm->lock); - xe_vm_assert_held(vops->vm); - - /* FIXME: Not 100% correct */ - for (i = 0; i < pt_update_ops->num_ops; ++i) { - struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops->ops[i]; - - if (pt_op->bind) - xe_pt_free_bind(pt_op->entries, pt_op->num_entries); - } - xe_bo_put_commit(&vops->pt_update_ops[tile->id].deferred); -} - -/** - * xe_pt_update_ops_abort() - Abort PT update operations - * @tile: Tile of PT update operations - * @vops: VMA operationa - * - * Abort PT update operations by unwinding internal PT state - */ -void xe_pt_update_ops_abort(struct xe_tile *tile, struct xe_vma_ops *vops) -{ - lockdep_assert_held(&vops->vm->lock); - xe_vm_assert_held(vops->vm); - - /* FIXME: Just kill VM for now + cleanup PTs */ - xe_bo_put_commit(&vops->pt_update_ops[tile->id].deferred); - xe_vm_kill(vops->vm, false); -} |