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| -rw-r--r-- | rr-cache/5ec556d7fa055abad45fafc9a0dc90a03dba7677/preimage | 2374 |
1 files changed, 2374 insertions, 0 deletions
diff --git a/rr-cache/5ec556d7fa055abad45fafc9a0dc90a03dba7677/preimage b/rr-cache/5ec556d7fa055abad45fafc9a0dc90a03dba7677/preimage new file mode 100644 index 000000000000..524891b996a2 --- /dev/null +++ b/rr-cache/5ec556d7fa055abad45fafc9a0dc90a03dba7677/preimage @@ -0,0 +1,2374 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "xe_bo.h" + +#include <linux/dma-buf.h> + +#include <drm/drm_drv.h> +#include <drm/drm_gem_ttm_helper.h> +#include <drm/drm_managed.h> +#include <drm/ttm/ttm_device.h> +#include <drm/ttm/ttm_placement.h> +#include <drm/ttm/ttm_tt.h> +#include <drm/xe_drm.h> + +#include "xe_device.h" +#include "xe_dma_buf.h" +#include "xe_drm_client.h" +#include "xe_ggtt.h" +#include "xe_gt.h" +#include "xe_map.h" +#include "xe_migrate.h" +#include "xe_pm.h" +#include "xe_preempt_fence.h" +#include "xe_res_cursor.h" +#include "xe_trace_bo.h" +#include "xe_ttm_stolen_mgr.h" +#include "xe_vm.h" + +const char *const xe_mem_type_to_name[TTM_NUM_MEM_TYPES] = { + [XE_PL_SYSTEM] = "system", + [XE_PL_TT] = "gtt", + [XE_PL_VRAM0] = "vram0", + [XE_PL_VRAM1] = "vram1", + [XE_PL_STOLEN] = "stolen" +}; + +static const struct ttm_place sys_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = XE_PL_SYSTEM, + .flags = 0, +}; + +static struct ttm_placement sys_placement = { + .num_placement = 1, + .placement = &sys_placement_flags, +}; + +static const struct ttm_place tt_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = XE_PL_TT, + .flags = TTM_PL_FLAG_DESIRED, + }, + { + .fpfn = 0, + .lpfn = 0, + .mem_type = XE_PL_SYSTEM, + .flags = TTM_PL_FLAG_FALLBACK, + } +}; + +static struct ttm_placement tt_placement = { + .num_placement = 2, + .placement = tt_placement_flags, +}; + +bool mem_type_is_vram(u32 mem_type) +{ + return mem_type >= XE_PL_VRAM0 && mem_type != XE_PL_STOLEN; +} + +static bool resource_is_stolen_vram(struct xe_device *xe, struct ttm_resource *res) +{ + return res->mem_type == XE_PL_STOLEN && IS_DGFX(xe); +} + +static bool resource_is_vram(struct ttm_resource *res) +{ + return mem_type_is_vram(res->mem_type); +} + +bool xe_bo_is_vram(struct xe_bo *bo) +{ + return resource_is_vram(bo->ttm.resource) || + resource_is_stolen_vram(xe_bo_device(bo), bo->ttm.resource); +} + +bool xe_bo_is_stolen(struct xe_bo *bo) +{ + return bo->ttm.resource->mem_type == XE_PL_STOLEN; +} + +/** + * xe_bo_has_single_placement - check if BO is placed only in one memory location + * @bo: The BO + * + * This function checks whether a given BO is placed in only one memory location. + * + * Returns: true if the BO is placed in a single memory location, false otherwise. + * + */ +bool xe_bo_has_single_placement(struct xe_bo *bo) +{ + return bo->placement.num_placement == 1; +} + +/** + * xe_bo_is_stolen_devmem - check if BO is of stolen type accessed via PCI BAR + * @bo: The BO + * + * The stolen memory is accessed through the PCI BAR for both DGFX and some + * integrated platforms that have a dedicated bit in the PTE for devmem (DM). + * + * Returns: true if it's stolen memory accessed via PCI BAR, false otherwise. + */ +bool xe_bo_is_stolen_devmem(struct xe_bo *bo) +{ + return xe_bo_is_stolen(bo) && + GRAPHICS_VERx100(xe_bo_device(bo)) >= 1270; +} + +static bool xe_bo_is_user(struct xe_bo *bo) +{ + return bo->flags & XE_BO_FLAG_USER; +} + +static struct xe_migrate * +mem_type_to_migrate(struct xe_device *xe, u32 mem_type) +{ + struct xe_tile *tile; + + xe_assert(xe, mem_type == XE_PL_STOLEN || mem_type_is_vram(mem_type)); + tile = &xe->tiles[mem_type == XE_PL_STOLEN ? 0 : (mem_type - XE_PL_VRAM0)]; + return tile->migrate; +} + +static struct xe_mem_region *res_to_mem_region(struct ttm_resource *res) +{ + struct xe_device *xe = ttm_to_xe_device(res->bo->bdev); + struct ttm_resource_manager *mgr; + + xe_assert(xe, resource_is_vram(res)); + mgr = ttm_manager_type(&xe->ttm, res->mem_type); + return to_xe_ttm_vram_mgr(mgr)->vram; +} + +static void try_add_system(struct xe_device *xe, struct xe_bo *bo, + u32 bo_flags, u32 *c) +{ + if (bo_flags & XE_BO_FLAG_SYSTEM) { + xe_assert(xe, *c < ARRAY_SIZE(bo->placements)); + + bo->placements[*c] = (struct ttm_place) { + .mem_type = XE_PL_TT, + }; + *c += 1; + } +} + +static void add_vram(struct xe_device *xe, struct xe_bo *bo, + struct ttm_place *places, u32 bo_flags, u32 mem_type, u32 *c) +{ + struct ttm_place place = { .mem_type = mem_type }; + struct xe_mem_region *vram; + u64 io_size; + + xe_assert(xe, *c < ARRAY_SIZE(bo->placements)); + + vram = to_xe_ttm_vram_mgr(ttm_manager_type(&xe->ttm, mem_type))->vram; + xe_assert(xe, vram && vram->usable_size); + io_size = vram->io_size; + + /* + * For eviction / restore on suspend / resume objects + * pinned in VRAM must be contiguous + */ + if (bo_flags & (XE_BO_FLAG_PINNED | + XE_BO_FLAG_GGTT)) + place.flags |= TTM_PL_FLAG_CONTIGUOUS; + + if (io_size < vram->usable_size) { + if (bo_flags & XE_BO_FLAG_NEEDS_CPU_ACCESS) { + place.fpfn = 0; + place.lpfn = io_size >> PAGE_SHIFT; + } else { + place.flags |= TTM_PL_FLAG_TOPDOWN; + } + } + places[*c] = place; + *c += 1; +} + +static void try_add_vram(struct xe_device *xe, struct xe_bo *bo, + u32 bo_flags, u32 *c) +{ + if (bo_flags & XE_BO_FLAG_VRAM0) + add_vram(xe, bo, bo->placements, bo_flags, XE_PL_VRAM0, c); + if (bo_flags & XE_BO_FLAG_VRAM1) + add_vram(xe, bo, bo->placements, bo_flags, XE_PL_VRAM1, c); +} + +static void try_add_stolen(struct xe_device *xe, struct xe_bo *bo, + u32 bo_flags, u32 *c) +{ + if (bo_flags & XE_BO_FLAG_STOLEN) { + xe_assert(xe, *c < ARRAY_SIZE(bo->placements)); + + bo->placements[*c] = (struct ttm_place) { + .mem_type = XE_PL_STOLEN, + .flags = bo_flags & (XE_BO_FLAG_PINNED | + XE_BO_FLAG_GGTT) ? + TTM_PL_FLAG_CONTIGUOUS : 0, + }; + *c += 1; + } +} + +static int __xe_bo_placement_for_flags(struct xe_device *xe, struct xe_bo *bo, + u32 bo_flags) +{ + u32 c = 0; + + try_add_vram(xe, bo, bo_flags, &c); + try_add_system(xe, bo, bo_flags, &c); + try_add_stolen(xe, bo, bo_flags, &c); + + if (!c) + return -EINVAL; + + bo->placement = (struct ttm_placement) { + .num_placement = c, + .placement = bo->placements, + }; + + return 0; +} + +int xe_bo_placement_for_flags(struct xe_device *xe, struct xe_bo *bo, + u32 bo_flags) +{ + xe_bo_assert_held(bo); + return __xe_bo_placement_for_flags(xe, bo, bo_flags); +} + +static void xe_evict_flags(struct ttm_buffer_object *tbo, + struct ttm_placement *placement) +{ + if (!xe_bo_is_xe_bo(tbo)) { + /* Don't handle scatter gather BOs */ + if (tbo->type == ttm_bo_type_sg) { + placement->num_placement = 0; + return; + } + + *placement = sys_placement; + return; + } + + /* + * For xe, sg bos that are evicted to system just triggers a + * rebind of the sg list upon subsequent validation to XE_PL_TT. + */ + switch (tbo->resource->mem_type) { + case XE_PL_VRAM0: + case XE_PL_VRAM1: + case XE_PL_STOLEN: + *placement = tt_placement; + break; + case XE_PL_TT: + default: + *placement = sys_placement; + break; + } +} + +struct xe_ttm_tt { + struct ttm_tt ttm; + struct device *dev; + struct sg_table sgt; + struct sg_table *sg; +}; + +static int xe_tt_map_sg(struct ttm_tt *tt) +{ + struct xe_ttm_tt *xe_tt = container_of(tt, struct xe_ttm_tt, ttm); + unsigned long num_pages = tt->num_pages; + int ret; + + XE_WARN_ON(tt->page_flags & TTM_TT_FLAG_EXTERNAL); + + if (xe_tt->sg) + return 0; + + ret = sg_alloc_table_from_pages_segment(&xe_tt->sgt, tt->pages, + num_pages, 0, + (u64)num_pages << PAGE_SHIFT, + xe_sg_segment_size(xe_tt->dev), + GFP_KERNEL); + if (ret) + return ret; + + xe_tt->sg = &xe_tt->sgt; + ret = dma_map_sgtable(xe_tt->dev, xe_tt->sg, DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC); + if (ret) { + sg_free_table(xe_tt->sg); + xe_tt->sg = NULL; + return ret; + } + + return 0; +} + +static void xe_tt_unmap_sg(struct ttm_tt *tt) +{ + struct xe_ttm_tt *xe_tt = container_of(tt, struct xe_ttm_tt, ttm); + + if (xe_tt->sg) { + dma_unmap_sgtable(xe_tt->dev, xe_tt->sg, + DMA_BIDIRECTIONAL, 0); + sg_free_table(xe_tt->sg); + xe_tt->sg = NULL; + } +} + +struct sg_table *xe_bo_sg(struct xe_bo *bo) +{ + struct ttm_tt *tt = bo->ttm.ttm; + struct xe_ttm_tt *xe_tt = container_of(tt, struct xe_ttm_tt, ttm); + + return xe_tt->sg; +} + +static struct ttm_tt *xe_ttm_tt_create(struct ttm_buffer_object *ttm_bo, + u32 page_flags) +{ + struct xe_bo *bo = ttm_to_xe_bo(ttm_bo); + struct xe_device *xe = xe_bo_device(bo); + struct xe_ttm_tt *tt; + unsigned long extra_pages; + enum ttm_caching caching = ttm_cached; + int err; + + tt = kzalloc(sizeof(*tt), GFP_KERNEL); + if (!tt) + return NULL; + + tt->dev = xe->drm.dev; + + extra_pages = 0; + if (xe_bo_needs_ccs_pages(bo)) + extra_pages = DIV_ROUND_UP(xe_device_ccs_bytes(xe, bo->size), + PAGE_SIZE); + + /* + * DGFX system memory is always WB / ttm_cached, since + * other caching modes are only supported on x86. DGFX + * GPU system memory accesses are always coherent with the + * CPU. + */ + if (!IS_DGFX(xe)) { + switch (bo->cpu_caching) { + case DRM_XE_GEM_CPU_CACHING_WC: + caching = ttm_write_combined; + break; + default: + caching = ttm_cached; + break; + } + + WARN_ON((bo->flags & XE_BO_FLAG_USER) && !bo->cpu_caching); + + /* + * Display scanout is always non-coherent with the CPU cache. + * + * For Xe_LPG and beyond, PPGTT PTE lookups are also + * non-coherent and require a CPU:WC mapping. + */ + if ((!bo->cpu_caching && bo->flags & XE_BO_FLAG_SCANOUT) || + (xe->info.graphics_verx100 >= 1270 && + bo->flags & XE_BO_FLAG_PAGETABLE)) + caching = ttm_write_combined; + } + + if (bo->flags & XE_BO_FLAG_NEEDS_UC) { + /* + * Valid only for internally-created buffers only, for + * which cpu_caching is never initialized. + */ + xe_assert(xe, bo->cpu_caching == 0); + caching = ttm_uncached; + } + + err = ttm_tt_init(&tt->ttm, &bo->ttm, page_flags, caching, extra_pages); + if (err) { + kfree(tt); + return NULL; + } + + return &tt->ttm; +} + +static int xe_ttm_tt_populate(struct ttm_device *ttm_dev, struct ttm_tt *tt, + struct ttm_operation_ctx *ctx) +{ + int err; + + /* + * dma-bufs are not populated with pages, and the dma- + * addresses are set up when moved to XE_PL_TT. + */ + if (tt->page_flags & TTM_TT_FLAG_EXTERNAL) + return 0; + + err = ttm_pool_alloc(&ttm_dev->pool, tt, ctx); + if (err) + return err; + + return err; +} + +static void xe_ttm_tt_unpopulate(struct ttm_device *ttm_dev, struct ttm_tt *tt) +{ + if (tt->page_flags & TTM_TT_FLAG_EXTERNAL) + return; + + xe_tt_unmap_sg(tt); + + return ttm_pool_free(&ttm_dev->pool, tt); +} + +static void xe_ttm_tt_destroy(struct ttm_device *ttm_dev, struct ttm_tt *tt) +{ + ttm_tt_fini(tt); + kfree(tt); +} + +static int xe_ttm_io_mem_reserve(struct ttm_device *bdev, + struct ttm_resource *mem) +{ + struct xe_device *xe = ttm_to_xe_device(bdev); + + switch (mem->mem_type) { + case XE_PL_SYSTEM: + case XE_PL_TT: + return 0; + case XE_PL_VRAM0: + case XE_PL_VRAM1: { + struct xe_ttm_vram_mgr_resource *vres = + to_xe_ttm_vram_mgr_resource(mem); + struct xe_mem_region *vram = res_to_mem_region(mem); + + if (vres->used_visible_size < mem->size) + return -EINVAL; + + mem->bus.offset = mem->start << PAGE_SHIFT; + + if (vram->mapping && + mem->placement & TTM_PL_FLAG_CONTIGUOUS) + mem->bus.addr = (u8 __force *)vram->mapping + + mem->bus.offset; + + mem->bus.offset += vram->io_start; + mem->bus.is_iomem = true; + +#if !defined(CONFIG_X86) + mem->bus.caching = ttm_write_combined; +#endif + return 0; + } case XE_PL_STOLEN: + return xe_ttm_stolen_io_mem_reserve(xe, mem); + default: + return -EINVAL; + } +} + +static int xe_bo_trigger_rebind(struct xe_device *xe, struct xe_bo *bo, + const struct ttm_operation_ctx *ctx) +{ + struct dma_resv_iter cursor; + struct dma_fence *fence; + struct drm_gem_object *obj = &bo->ttm.base; + struct drm_gpuvm_bo *vm_bo; + bool idle = false; + int ret = 0; + + dma_resv_assert_held(bo->ttm.base.resv); + + if (!list_empty(&bo->ttm.base.gpuva.list)) { + dma_resv_iter_begin(&cursor, bo->ttm.base.resv, + DMA_RESV_USAGE_BOOKKEEP); + dma_resv_for_each_fence_unlocked(&cursor, fence) + dma_fence_enable_sw_signaling(fence); + dma_resv_iter_end(&cursor); + } + + drm_gem_for_each_gpuvm_bo(vm_bo, obj) { + struct xe_vm *vm = gpuvm_to_vm(vm_bo->vm); + struct drm_gpuva *gpuva; + + if (!xe_vm_in_fault_mode(vm)) { + drm_gpuvm_bo_evict(vm_bo, true); + continue; + } + + if (!idle) { + long timeout; + + if (ctx->no_wait_gpu && + !dma_resv_test_signaled(bo->ttm.base.resv, + DMA_RESV_USAGE_BOOKKEEP)) + return -EBUSY; + + timeout = dma_resv_wait_timeout(bo->ttm.base.resv, + DMA_RESV_USAGE_BOOKKEEP, + ctx->interruptible, + MAX_SCHEDULE_TIMEOUT); + if (!timeout) + return -ETIME; + if (timeout < 0) + return timeout; + + idle = true; + } + + drm_gpuvm_bo_for_each_va(gpuva, vm_bo) { + struct xe_vma *vma = gpuva_to_vma(gpuva); + + trace_xe_vma_evict(vma); + ret = xe_vm_invalidate_vma(vma); + if (XE_WARN_ON(ret)) + return ret; + } + } + + return ret; +} + +/* + * The dma-buf map_attachment() / unmap_attachment() is hooked up here. + * Note that unmapping the attachment is deferred to the next + * map_attachment time, or to bo destroy (after idling) whichever comes first. + * This is to avoid syncing before unmap_attachment(), assuming that the + * caller relies on idling the reservation object before moving the + * backing store out. Should that assumption not hold, then we will be able + * to unconditionally call unmap_attachment() when moving out to system. + */ +static int xe_bo_move_dmabuf(struct ttm_buffer_object *ttm_bo, + struct ttm_resource *new_res) +{ + struct dma_buf_attachment *attach = ttm_bo->base.import_attach; + struct xe_ttm_tt *xe_tt = container_of(ttm_bo->ttm, struct xe_ttm_tt, + ttm); + struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev); + struct sg_table *sg; + + xe_assert(xe, attach); + xe_assert(xe, ttm_bo->ttm); + + if (new_res->mem_type == XE_PL_SYSTEM) + goto out; + + if (ttm_bo->sg) { + dma_buf_unmap_attachment(attach, ttm_bo->sg, DMA_BIDIRECTIONAL); + ttm_bo->sg = NULL; + } + + sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sg)) + return PTR_ERR(sg); + + ttm_bo->sg = sg; + xe_tt->sg = sg; + +out: + ttm_bo_move_null(ttm_bo, new_res); + + return 0; +} + +/** + * xe_bo_move_notify - Notify subsystems of a pending move + * @bo: The buffer object + * @ctx: The struct ttm_operation_ctx controlling locking and waits. + * + * This function notifies subsystems of an upcoming buffer move. + * Upon receiving such a notification, subsystems should schedule + * halting access to the underlying pages and optionally add a fence + * to the buffer object's dma_resv object, that signals when access is + * stopped. The caller will wait on all dma_resv fences before + * starting the move. + * + * A subsystem may commence access to the object after obtaining + * bindings to the new backing memory under the object lock. + * + * Return: 0 on success, -EINTR or -ERESTARTSYS if interrupted in fault mode, + * negative error code on error. + */ +static int xe_bo_move_notify(struct xe_bo *bo, + const struct ttm_operation_ctx *ctx) +{ + struct ttm_buffer_object *ttm_bo = &bo->ttm; + struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev); + struct ttm_resource *old_mem = ttm_bo->resource; + u32 old_mem_type = old_mem ? old_mem->mem_type : XE_PL_SYSTEM; + int ret; + + /* + * If this starts to call into many components, consider + * using a notification chain here. + */ + + if (xe_bo_is_pinned(bo)) + return -EINVAL; + + xe_bo_vunmap(bo); + ret = xe_bo_trigger_rebind(xe, bo, ctx); + if (ret) + return ret; + + /* Don't call move_notify() for imported dma-bufs. */ + if (ttm_bo->base.dma_buf && !ttm_bo->base.import_attach) + dma_buf_move_notify(ttm_bo->base.dma_buf); + + /* + * TTM has already nuked the mmap for us (see ttm_bo_unmap_virtual), + * so if we moved from VRAM make sure to unlink this from the userfault + * tracking. + */ + if (mem_type_is_vram(old_mem_type)) { + mutex_lock(&xe->mem_access.vram_userfault.lock); + if (!list_empty(&bo->vram_userfault_link)) + list_del_init(&bo->vram_userfault_link); + mutex_unlock(&xe->mem_access.vram_userfault.lock); + } + + return 0; +} + +static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict, + struct ttm_operation_ctx *ctx, + struct ttm_resource *new_mem, + struct ttm_place *hop) +{ + struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev); + struct xe_bo *bo = ttm_to_xe_bo(ttm_bo); + struct ttm_resource *old_mem = ttm_bo->resource; + u32 old_mem_type = old_mem ? old_mem->mem_type : XE_PL_SYSTEM; + struct ttm_tt *ttm = ttm_bo->ttm; + struct xe_migrate *migrate = NULL; + struct dma_fence *fence; + bool move_lacks_source; + bool tt_has_data; + bool needs_clear; + bool handle_system_ccs = (!IS_DGFX(xe) && xe_bo_needs_ccs_pages(bo) && + ttm && ttm_tt_is_populated(ttm)) ? true : false; + int ret = 0; + + /* Bo creation path, moving to system or TT. */ + if ((!old_mem && ttm) && !handle_system_ccs) { + if (new_mem->mem_type == XE_PL_TT) + ret = xe_tt_map_sg(ttm); + if (!ret) + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + + if (ttm_bo->type == ttm_bo_type_sg) { + ret = xe_bo_move_notify(bo, ctx); + if (!ret) + ret = xe_bo_move_dmabuf(ttm_bo, new_mem); + return ret; + } + + tt_has_data = ttm && (ttm_tt_is_populated(ttm) || + (ttm->page_flags & TTM_TT_FLAG_SWAPPED)); + + move_lacks_source = !old_mem || (handle_system_ccs ? (!bo->ccs_cleared) : + (!mem_type_is_vram(old_mem_type) && !tt_has_data)); + + needs_clear = (ttm && ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC) || + (!ttm && ttm_bo->type == ttm_bo_type_device); + + if (new_mem->mem_type == XE_PL_TT) { + ret = xe_tt_map_sg(ttm); + if (ret) + goto out; + } + + if ((move_lacks_source && !needs_clear)) { + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + + if (old_mem_type == XE_PL_SYSTEM && new_mem->mem_type == XE_PL_TT && !handle_system_ccs) { + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + + /* + * Failed multi-hop where the old_mem is still marked as + * TTM_PL_FLAG_TEMPORARY, should just be a dummy move. + */ + if (old_mem_type == XE_PL_TT && + new_mem->mem_type == XE_PL_TT) { + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + + if (!move_lacks_source && !xe_bo_is_pinned(bo)) { + ret = xe_bo_move_notify(bo, ctx); + if (ret) + goto out; + } + + if (old_mem_type == XE_PL_TT && + new_mem->mem_type == XE_PL_SYSTEM) { + long timeout = dma_resv_wait_timeout(ttm_bo->base.resv, + DMA_RESV_USAGE_BOOKKEEP, + true, + MAX_SCHEDULE_TIMEOUT); + if (timeout < 0) { + ret = timeout; + goto out; + } + + if (!handle_system_ccs) { + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + } + + if (!move_lacks_source && + ((old_mem_type == XE_PL_SYSTEM && resource_is_vram(new_mem)) || + (mem_type_is_vram(old_mem_type) && + new_mem->mem_type == XE_PL_SYSTEM))) { + hop->fpfn = 0; + hop->lpfn = 0; + hop->mem_type = XE_PL_TT; + hop->flags = TTM_PL_FLAG_TEMPORARY; + ret = -EMULTIHOP; + goto out; + } + + if (bo->tile) + migrate = bo->tile->migrate; + else if (resource_is_vram(new_mem)) + migrate = mem_type_to_migrate(xe, new_mem->mem_type); + else if (mem_type_is_vram(old_mem_type)) + migrate = mem_type_to_migrate(xe, old_mem_type); + else + migrate = xe->tiles[0].migrate; + + xe_assert(xe, migrate); + trace_xe_bo_move(bo, new_mem->mem_type, old_mem_type, move_lacks_source); + xe_pm_runtime_get_noresume(xe); + + if (xe_bo_is_pinned(bo) && !xe_bo_is_user(bo)) { + /* + * Kernel memory that is pinned should only be moved on suspend + * / resume, some of the pinned memory is required for the + * device to resume / use the GPU to move other evicted memory + * (user memory) around. This likely could be optimized a bit + * futher where we find the minimum set of pinned memory + * required for resume but for simplity doing a memcpy for all + * pinned memory. + */ + ret = xe_bo_vmap(bo); + if (!ret) { + ret = ttm_bo_move_memcpy(ttm_bo, ctx, new_mem); + + /* Create a new VMAP once kernel BO back in VRAM */ + if (!ret && resource_is_vram(new_mem)) { + struct xe_mem_region *vram = res_to_mem_region(new_mem); + void __iomem *new_addr = vram->mapping + + (new_mem->start << PAGE_SHIFT); + + if (XE_WARN_ON(new_mem->start == XE_BO_INVALID_OFFSET)) { + ret = -EINVAL; + xe_pm_runtime_put(xe); + goto out; + } + + xe_assert(xe, new_mem->start == + bo->placements->fpfn); + + iosys_map_set_vaddr_iomem(&bo->vmap, new_addr); + } + } + } else { + if (move_lacks_source) + fence = xe_migrate_clear(migrate, bo, new_mem); + else + fence = xe_migrate_copy(migrate, bo, bo, old_mem, + new_mem, handle_system_ccs); + if (IS_ERR(fence)) { + ret = PTR_ERR(fence); + xe_pm_runtime_put(xe); + goto out; + } + if (!move_lacks_source) { + ret = ttm_bo_move_accel_cleanup(ttm_bo, fence, evict, + true, new_mem); + if (ret) { + dma_fence_wait(fence, false); + ttm_bo_move_null(ttm_bo, new_mem); + ret = 0; + } + } else { + /* + * ttm_bo_move_accel_cleanup() may blow up if + * bo->resource == NULL, so just attach the + * fence and set the new resource. + */ + dma_resv_add_fence(ttm_bo->base.resv, fence, + DMA_RESV_USAGE_KERNEL); + ttm_bo_move_null(ttm_bo, new_mem); + } + + dma_fence_put(fence); + } + + xe_pm_runtime_put(xe); + +out: + if ((!ttm_bo->resource || ttm_bo->resource->mem_type == XE_PL_SYSTEM) && + ttm_bo->ttm) + xe_tt_unmap_sg(ttm_bo->ttm); + + return ret; +} + +/** + * xe_bo_evict_pinned() - Evict a pinned VRAM object to system memory + * @bo: The buffer object to move. + * + * On successful completion, the object memory will be moved to sytem memory. + * + * This is needed to for special handling of pinned VRAM object during + * suspend-resume. + * + * Return: 0 on success. Negative error code on failure. + */ +int xe_bo_evict_pinned(struct xe_bo *bo) +{ + struct ttm_place place = { + .mem_type = XE_PL_TT, + }; + struct ttm_placement placement = { + .placement = &place, + .num_placement = 1, + }; + struct ttm_operation_ctx ctx = { + .interruptible = false, + }; + struct ttm_resource *new_mem; + int ret; + + xe_bo_assert_held(bo); + + if (WARN_ON(!bo->ttm.resource)) + return -EINVAL; + + if (WARN_ON(!xe_bo_is_pinned(bo))) + return -EINVAL; + + if (WARN_ON(!xe_bo_is_vram(bo))) + return -EINVAL; + + ret = ttm_bo_mem_space(&bo->ttm, &placement, &new_mem, &ctx); + if (ret) + return ret; + + if (!bo->ttm.ttm) { + bo->ttm.ttm = xe_ttm_tt_create(&bo->ttm, 0); + if (!bo->ttm.ttm) { + ret = -ENOMEM; + goto err_res_free; + } + } + + ret = ttm_tt_populate(bo->ttm.bdev, bo->ttm.ttm, &ctx); + if (ret) + goto err_res_free; + + ret = dma_resv_reserve_fences(bo->ttm.base.resv, 1); + if (ret) + goto err_res_free; + + ret = xe_bo_move(&bo->ttm, false, &ctx, new_mem, NULL); + if (ret) + goto err_res_free; + + return 0; + +err_res_free: + ttm_resource_free(&bo->ttm, &new_mem); + return ret; +} + +/** + * xe_bo_restore_pinned() - Restore a pinned VRAM object + * @bo: The buffer object to move. + * + * On successful completion, the object memory will be moved back to VRAM. + * + * This is needed to for special handling of pinned VRAM object during + * suspend-resume. + * + * Return: 0 on success. Negative error code on failure. + */ +int xe_bo_restore_pinned(struct xe_bo *bo) +{ + struct ttm_operation_ctx ctx = { + .interruptible = false, + }; + struct ttm_resource *new_mem; + int ret; + + xe_bo_assert_held(bo); + + if (WARN_ON(!bo->ttm.resource)) + return -EINVAL; + + if (WARN_ON(!xe_bo_is_pinned(bo))) + return -EINVAL; + + if (WARN_ON(xe_bo_is_vram(bo))) + return -EINVAL; + + if (WARN_ON(!bo->ttm.ttm && !xe_bo_is_stolen(bo))) + return -EINVAL; + + ret = ttm_bo_mem_space(&bo->ttm, &bo->placement, &new_mem, &ctx); + if (ret) + return ret; + + ret = ttm_tt_populate(bo->ttm.bdev, bo->ttm.ttm, &ctx); + if (ret) + goto err_res_free; + + ret = dma_resv_reserve_fences(bo->ttm.base.resv, 1); + if (ret) + goto err_res_free; + + ret = xe_bo_move(&bo->ttm, false, &ctx, new_mem, NULL); + if (ret) + goto err_res_free; + + return 0; + +err_res_free: + ttm_resource_free(&bo->ttm, &new_mem); + return ret; +} + +static unsigned long xe_ttm_io_mem_pfn(struct ttm_buffer_object *ttm_bo, + unsigned long page_offset) +{ + struct xe_bo *bo = ttm_to_xe_bo(ttm_bo); + struct xe_res_cursor cursor; + struct xe_mem_region *vram; + + if (ttm_bo->resource->mem_type == XE_PL_STOLEN) + return xe_ttm_stolen_io_offset(bo, page_offset << PAGE_SHIFT) >> PAGE_SHIFT; + + vram = res_to_mem_region(ttm_bo->resource); + xe_res_first(ttm_bo->resource, (u64)page_offset << PAGE_SHIFT, 0, &cursor); + return (vram->io_start + cursor.start) >> PAGE_SHIFT; +} + +static void __xe_bo_vunmap(struct xe_bo *bo); + +/* + * TODO: Move this function to TTM so we don't rely on how TTM does its + * locking, thereby abusing TTM internals. + */ +static bool xe_ttm_bo_lock_in_destructor(struct ttm_buffer_object *ttm_bo) +{ + struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev); + bool locked; + + xe_assert(xe, !kref_read(&ttm_bo->kref)); + + /* + * We can typically only race with TTM trylocking under the + * lru_lock, which will immediately be unlocked again since + * the ttm_bo refcount is zero at this point. So trylocking *should* + * always succeed here, as long as we hold the lru lock. + */ + spin_lock(&ttm_bo->bdev->lru_lock); + locked = dma_resv_trylock(ttm_bo->base.resv); + spin_unlock(&ttm_bo->bdev->lru_lock); + xe_assert(xe, locked); + + return locked; +} + +static void xe_ttm_bo_release_notify(struct ttm_buffer_object *ttm_bo) +{ + struct dma_resv_iter cursor; + struct dma_fence *fence; + struct dma_fence *replacement = NULL; + struct xe_bo *bo; + + if (!xe_bo_is_xe_bo(ttm_bo)) + return; + + bo = ttm_to_xe_bo(ttm_bo); + xe_assert(xe_bo_device(bo), !(bo->created && kref_read(&ttm_bo->base.refcount))); + + /* + * Corner case where TTM fails to allocate memory and this BOs resv + * still points the VMs resv + */ + if (ttm_bo->base.resv != &ttm_bo->base._resv) + return; + + if (!xe_ttm_bo_lock_in_destructor(ttm_bo)) + return; + + /* + * Scrub the preempt fences if any. The unbind fence is already + * attached to the resv. + * TODO: Don't do this for external bos once we scrub them after + * unbind. + */ + dma_resv_for_each_fence(&cursor, ttm_bo->base.resv, + DMA_RESV_USAGE_BOOKKEEP, fence) { + if (xe_fence_is_xe_preempt(fence) && + !dma_fence_is_signaled(fence)) { + if (!replacement) + replacement = dma_fence_get_stub(); + + dma_resv_replace_fences(ttm_bo->base.resv, + fence->context, + replacement, + DMA_RESV_USAGE_BOOKKEEP); + } + } + dma_fence_put(replacement); + + dma_resv_unlock(ttm_bo->base.resv); +} + +static void xe_ttm_bo_delete_mem_notify(struct ttm_buffer_object *ttm_bo) +{ + if (!xe_bo_is_xe_bo(ttm_bo)) + return; + + /* + * Object is idle and about to be destroyed. Release the + * dma-buf attachment. + */ + if (ttm_bo->type == ttm_bo_type_sg && ttm_bo->sg) { + struct xe_ttm_tt *xe_tt = container_of(ttm_bo->ttm, + struct xe_ttm_tt, ttm); + + dma_buf_unmap_attachment(ttm_bo->base.import_attach, ttm_bo->sg, + DMA_BIDIRECTIONAL); + ttm_bo->sg = NULL; + xe_tt->sg = NULL; + } +} + +const struct ttm_device_funcs xe_ttm_funcs = { + .ttm_tt_create = xe_ttm_tt_create, + .ttm_tt_populate = xe_ttm_tt_populate, + .ttm_tt_unpopulate = xe_ttm_tt_unpopulate, + .ttm_tt_destroy = xe_ttm_tt_destroy, + .evict_flags = xe_evict_flags, + .move = xe_bo_move, + .io_mem_reserve = xe_ttm_io_mem_reserve, + .io_mem_pfn = xe_ttm_io_mem_pfn, + .release_notify = xe_ttm_bo_release_notify, + .eviction_valuable = ttm_bo_eviction_valuable, + .delete_mem_notify = xe_ttm_bo_delete_mem_notify, +}; + +static void xe_ttm_bo_destroy(struct ttm_buffer_object *ttm_bo) +{ + struct xe_bo *bo = ttm_to_xe_bo(ttm_bo); + struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev); + + if (bo->ttm.base.import_attach) + drm_prime_gem_destroy(&bo->ttm.base, NULL); + drm_gem_object_release(&bo->ttm.base); + + xe_assert(xe, list_empty(&ttm_bo->base.gpuva.list)); + + if (bo->ggtt_node.size) + xe_ggtt_remove_bo(bo->tile->mem.ggtt, bo); + +#ifdef CONFIG_PROC_FS + if (bo->client) + xe_drm_client_remove_bo(bo); +#endif + + if (bo->vm && xe_bo_is_user(bo)) + xe_vm_put(bo->vm); + + mutex_lock(&xe->mem_access.vram_userfault.lock); + if (!list_empty(&bo->vram_userfault_link)) + list_del(&bo->vram_userfault_link); + mutex_unlock(&xe->mem_access.vram_userfault.lock); + + kfree(bo); +} + +static void xe_gem_object_free(struct drm_gem_object *obj) +{ + /* Our BO reference counting scheme works as follows: + * + * The gem object kref is typically used throughout the driver, + * and the gem object holds a ttm_buffer_object refcount, so + * that when the last gem object reference is put, which is when + * we end up in this function, we put also that ttm_buffer_object + * refcount. Anything using gem interfaces is then no longer + * allowed to access the object in a way that requires a gem + * refcount, including locking the object. + * + * driver ttm callbacks is allowed to use the ttm_buffer_object + * refcount directly if needed. + */ + __xe_bo_vunmap(gem_to_xe_bo(obj)); + ttm_bo_put(container_of(obj, struct ttm_buffer_object, base)); +} + +static void xe_gem_object_close(struct drm_gem_object *obj, + struct drm_file *file_priv) +{ + struct xe_bo *bo = gem_to_xe_bo(obj); + + if (bo->vm && !xe_vm_in_fault_mode(bo->vm)) { + xe_assert(xe_bo_device(bo), xe_bo_is_user(bo)); + + xe_bo_lock(bo, false); + ttm_bo_set_bulk_move(&bo->ttm, NULL); + xe_bo_unlock(bo); + } +} + +static vm_fault_t xe_gem_fault(struct vm_fault *vmf) +{ + struct ttm_buffer_object *tbo = vmf->vma->vm_private_data; + struct drm_device *ddev = tbo->base.dev; + struct xe_device *xe = to_xe_device(ddev); + struct xe_bo *bo = ttm_to_xe_bo(tbo); + bool needs_rpm = bo->flags & XE_BO_FLAG_VRAM_MASK; + vm_fault_t ret; + int idx; + + if (needs_rpm) + xe_pm_runtime_get(xe); + + ret = ttm_bo_vm_reserve(tbo, vmf); + if (ret) + goto out; + + if (drm_dev_enter(ddev, &idx)) { + trace_xe_bo_cpu_fault(bo); + + ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot, + TTM_BO_VM_NUM_PREFAULT); + drm_dev_exit(idx); + } else { + ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot); + } + + if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) + goto out; + /* + * ttm_bo_vm_reserve() already has dma_resv_lock. + */ + if (ret == VM_FAULT_NOPAGE && mem_type_is_vram(tbo->resource->mem_type)) { + mutex_lock(&xe->mem_access.vram_userfault.lock); + if (list_empty(&bo->vram_userfault_link)) + list_add(&bo->vram_userfault_link, &xe->mem_access.vram_userfault.list); + mutex_unlock(&xe->mem_access.vram_userfault.lock); + } + + dma_resv_unlock(tbo->base.resv); +out: + if (needs_rpm) + xe_pm_runtime_put(xe); + + return ret; +} + +static const struct vm_operations_struct xe_gem_vm_ops = { + .fault = xe_gem_fault, + .open = ttm_bo_vm_open, + .close = ttm_bo_vm_close, + .access = ttm_bo_vm_access +}; + +static const struct drm_gem_object_funcs xe_gem_object_funcs = { + .free = xe_gem_object_free, + .close = xe_gem_object_close, + .mmap = drm_gem_ttm_mmap, + .export = xe_gem_prime_export, + .vm_ops = &xe_gem_vm_ops, +}; + +/** + * xe_bo_alloc - Allocate storage for a struct xe_bo + * + * This funcition is intended to allocate storage to be used for input + * to __xe_bo_create_locked(), in the case a pointer to the bo to be + * created is needed before the call to __xe_bo_create_locked(). + * If __xe_bo_create_locked ends up never to be called, then the + * storage allocated with this function needs to be freed using + * xe_bo_free(). + * + * Return: A pointer to an uninitialized struct xe_bo on success, + * ERR_PTR(-ENOMEM) on error. + */ +struct xe_bo *xe_bo_alloc(void) +{ + struct xe_bo *bo = kzalloc(sizeof(*bo), GFP_KERNEL); + + if (!bo) + return ERR_PTR(-ENOMEM); + + return bo; +} + +/** + * xe_bo_free - Free storage allocated using xe_bo_alloc() + * @bo: The buffer object storage. + * + * Refer to xe_bo_alloc() documentation for valid use-cases. + */ +void xe_bo_free(struct xe_bo *bo) +{ + kfree(bo); +} + +struct xe_bo *___xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo, + struct xe_tile *tile, struct dma_resv *resv, + struct ttm_lru_bulk_move *bulk, size_t size, + u16 cpu_caching, enum ttm_bo_type type, + u32 flags) +{ + struct ttm_operation_ctx ctx = { + .interruptible = true, + .no_wait_gpu = false, + }; + struct ttm_placement *placement; + uint32_t alignment; + size_t aligned_size; + int err; + + /* Only kernel objects should set GT */ + xe_assert(xe, !tile || type == ttm_bo_type_kernel); + + if (XE_WARN_ON(!size)) { + xe_bo_free(bo); + return ERR_PTR(-EINVAL); + } + + if (flags & (XE_BO_FLAG_VRAM_MASK | XE_BO_FLAG_STOLEN) && + !(flags & XE_BO_FLAG_IGNORE_MIN_PAGE_SIZE) && + ((xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K) || + (flags & XE_BO_NEEDS_64K))) { + aligned_size = ALIGN(size, SZ_64K); + if (type != ttm_bo_type_device) + size = ALIGN(size, SZ_64K); + flags |= XE_BO_FLAG_INTERNAL_64K; + alignment = SZ_64K >> PAGE_SHIFT; + + } else { + aligned_size = ALIGN(size, SZ_4K); + flags &= ~XE_BO_FLAG_INTERNAL_64K; + alignment = SZ_4K >> PAGE_SHIFT; + } + + if (type == ttm_bo_type_device && aligned_size != size) + return ERR_PTR(-EINVAL); + + if (!bo) { + bo = xe_bo_alloc(); + if (IS_ERR(bo)) + return bo; + } + + bo->ccs_cleared = false; + bo->tile = tile; + bo->size = size; + bo->flags = flags; + bo->cpu_caching = cpu_caching; + bo->ttm.base.funcs = &xe_gem_object_funcs; + bo->ttm.priority = XE_BO_PRIORITY_NORMAL; + INIT_LIST_HEAD(&bo->pinned_link); +#ifdef CONFIG_PROC_FS + INIT_LIST_HEAD(&bo->client_link); +#endif + INIT_LIST_HEAD(&bo->vram_userfault_link); + + drm_gem_private_object_init(&xe->drm, &bo->ttm.base, size); + + if (resv) { + ctx.allow_res_evict = !(flags & XE_BO_FLAG_NO_RESV_EVICT); + ctx.resv = resv; + } + + if (!(flags & XE_BO_FLAG_FIXED_PLACEMENT)) { + err = __xe_bo_placement_for_flags(xe, bo, bo->flags); + if (WARN_ON(err)) { + xe_ttm_bo_destroy(&bo->ttm); + return ERR_PTR(err); + } + } + + /* Defer populating type_sg bos */ + placement = (type == ttm_bo_type_sg || + bo->flags & XE_BO_FLAG_DEFER_BACKING) ? &sys_placement : + &bo->placement; + err = ttm_bo_init_reserved(&xe->ttm, &bo->ttm, type, + placement, alignment, + &ctx, NULL, resv, xe_ttm_bo_destroy); + if (err) + return ERR_PTR(err); + + /* + * The VRAM pages underneath are potentially still being accessed by the + * GPU, as per async GPU clearing and async evictions. However TTM makes + * sure to add any corresponding move/clear fences into the objects + * dma-resv using the DMA_RESV_USAGE_KERNEL slot. + * + * For KMD internal buffers we don't care about GPU clearing, however we + * still need to handle async evictions, where the VRAM is still being + * accessed by the GPU. Most internal callers are not expecting this, + * since they are missing the required synchronisation before accessing + * the memory. To keep things simple just sync wait any kernel fences + * here, if the buffer is designated KMD internal. + * + * For normal userspace objects we should already have the required + * pipelining or sync waiting elsewhere, since we already have to deal + * with things like async GPU clearing. + */ + if (type == ttm_bo_type_kernel) { + long timeout = dma_resv_wait_timeout(bo->ttm.base.resv, + DMA_RESV_USAGE_KERNEL, + ctx.interruptible, + MAX_SCHEDULE_TIMEOUT); + + if (timeout < 0) { + if (!resv) + dma_resv_unlock(bo->ttm.base.resv); + xe_bo_put(bo); + return ERR_PTR(timeout); + } + } + + bo->created = true; + if (bulk) + ttm_bo_set_bulk_move(&bo->ttm, bulk); + else + ttm_bo_move_to_lru_tail_unlocked(&bo->ttm); + + return bo; +} + +static int __xe_bo_fixed_placement(struct xe_device *xe, + struct xe_bo *bo, + u32 flags, + u64 start, u64 end, u64 size) +{ + struct ttm_place *place = bo->placements; + + if (flags & (XE_BO_FLAG_USER | XE_BO_FLAG_SYSTEM)) + return -EINVAL; + + place->flags = TTM_PL_FLAG_CONTIGUOUS; + place->fpfn = start >> PAGE_SHIFT; + place->lpfn = end >> PAGE_SHIFT; + + switch (flags & (XE_BO_FLAG_STOLEN | XE_BO_FLAG_VRAM_MASK)) { + case XE_BO_FLAG_VRAM0: + place->mem_type = XE_PL_VRAM0; + break; + case XE_BO_FLAG_VRAM1: + place->mem_type = XE_PL_VRAM1; + break; + case XE_BO_FLAG_STOLEN: + place->mem_type = XE_PL_STOLEN; + break; + + default: + /* 0 or multiple of the above set */ + return -EINVAL; + } + + bo->placement = (struct ttm_placement) { + .num_placement = 1, + .placement = place, + }; + + return 0; +} + +static struct xe_bo * +__xe_bo_create_locked(struct xe_device *xe, + struct xe_tile *tile, struct xe_vm *vm, + size_t size, u64 start, u64 end, + u16 cpu_caching, enum ttm_bo_type type, u32 flags) +{ + struct xe_bo *bo = NULL; + int err; + + if (vm) + xe_vm_assert_held(vm); + + if (start || end != ~0ULL) { + bo = xe_bo_alloc(); + if (IS_ERR(bo)) + return bo; + + flags |= XE_BO_FLAG_FIXED_PLACEMENT; + err = __xe_bo_fixed_placement(xe, bo, flags, start, end, size); + if (err) { + xe_bo_free(bo); + return ERR_PTR(err); + } + } + + bo = ___xe_bo_create_locked(xe, bo, tile, vm ? xe_vm_resv(vm) : NULL, + vm && !xe_vm_in_fault_mode(vm) && + flags & XE_BO_FLAG_USER ? + &vm->lru_bulk_move : NULL, size, + cpu_caching, type, flags); + if (IS_ERR(bo)) + return bo; + + /* + * Note that instead of taking a reference no the drm_gpuvm_resv_bo(), + * to ensure the shared resv doesn't disappear under the bo, the bo + * will keep a reference to the vm, and avoid circular references + * by having all the vm's bo refereferences released at vm close + * time. + */ + if (vm && xe_bo_is_user(bo)) + xe_vm_get(vm); + bo->vm = vm; + + if (bo->flags & XE_BO_FLAG_GGTT) { + if (!tile && flags & XE_BO_FLAG_STOLEN) + tile = xe_device_get_root_tile(xe); + + xe_assert(xe, tile); + + if (flags & XE_BO_FLAG_FIXED_PLACEMENT) { + err = xe_ggtt_insert_bo_at(tile->mem.ggtt, bo, + start + bo->size, U64_MAX); + } else { + err = xe_ggtt_insert_bo(tile->mem.ggtt, bo); + } + if (err) + goto err_unlock_put_bo; + } + + return bo; + +err_unlock_put_bo: + __xe_bo_unset_bulk_move(bo); + xe_bo_unlock_vm_held(bo); + xe_bo_put(bo); + return ERR_PTR(err); +} + +struct xe_bo * +xe_bo_create_locked_range(struct xe_device *xe, + struct xe_tile *tile, struct xe_vm *vm, + size_t size, u64 start, u64 end, + enum ttm_bo_type type, u32 flags) +{ + return __xe_bo_create_locked(xe, tile, vm, size, start, end, 0, type, flags); +} + +struct xe_bo *xe_bo_create_locked(struct xe_device *xe, struct xe_tile *tile, + struct xe_vm *vm, size_t size, + enum ttm_bo_type type, u32 flags) +{ + return __xe_bo_create_locked(xe, tile, vm, size, 0, ~0ULL, 0, type, flags); +} + +struct xe_bo *xe_bo_create_user(struct xe_device *xe, struct xe_tile *tile, + struct xe_vm *vm, size_t size, + u16 cpu_caching, + enum ttm_bo_type type, + u32 flags) +{ + struct xe_bo *bo = __xe_bo_create_locked(xe, tile, vm, size, 0, ~0ULL, + cpu_caching, type, + flags | XE_BO_FLAG_USER); + if (!IS_ERR(bo)) + xe_bo_unlock_vm_held(bo); + + return bo; +} + +struct xe_bo *xe_bo_create(struct xe_device *xe, struct xe_tile *tile, + struct xe_vm *vm, size_t size, + enum ttm_bo_type type, u32 flags) +{ + struct xe_bo *bo = xe_bo_create_locked(xe, tile, vm, size, type, flags); + + if (!IS_ERR(bo)) + xe_bo_unlock_vm_held(bo); + + return bo; +} + +struct xe_bo *xe_bo_create_pin_map_at(struct xe_device *xe, struct xe_tile *tile, + struct xe_vm *vm, + size_t size, u64 offset, + enum ttm_bo_type type, u32 flags) +{ + struct xe_bo *bo; + int err; + u64 start = offset == ~0ull ? 0 : offset; + u64 end = offset == ~0ull ? offset : start + size; + + if (flags & XE_BO_FLAG_STOLEN && + xe_ttm_stolen_cpu_access_needs_ggtt(xe)) + flags |= XE_BO_FLAG_GGTT; + + bo = xe_bo_create_locked_range(xe, tile, vm, size, start, end, type, + flags | XE_BO_FLAG_NEEDS_CPU_ACCESS); + if (IS_ERR(bo)) + return bo; + + err = xe_bo_pin(bo); + if (err) + goto err_put; + + err = xe_bo_vmap(bo); + if (err) + goto err_unpin; + + xe_bo_unlock_vm_held(bo); + + return bo; + +err_unpin: + xe_bo_unpin(bo); +err_put: + xe_bo_unlock_vm_held(bo); + xe_bo_put(bo); + return ERR_PTR(err); +} + +struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_tile *tile, + struct xe_vm *vm, size_t size, + enum ttm_bo_type type, u32 flags) +{ + return xe_bo_create_pin_map_at(xe, tile, vm, size, ~0ull, type, flags); +} + +struct xe_bo *xe_bo_create_from_data(struct xe_device *xe, struct xe_tile *tile, + const void *data, size_t size, + enum ttm_bo_type type, u32 flags) +{ + struct xe_bo *bo = xe_bo_create_pin_map(xe, tile, NULL, + ALIGN(size, PAGE_SIZE), + type, flags); + if (IS_ERR(bo)) + return bo; + + xe_map_memcpy_to(xe, &bo->vmap, 0, data, size); + + return bo; +} + +static void __xe_bo_unpin_map_no_vm(void *arg) +{ + xe_bo_unpin_map_no_vm(arg); +} + +struct xe_bo *xe_managed_bo_create_pin_map(struct xe_device *xe, struct xe_tile *tile, + size_t size, u32 flags) +{ + struct xe_bo *bo; + int ret; + + bo = xe_bo_create_pin_map(xe, tile, NULL, size, ttm_bo_type_kernel, flags); + if (IS_ERR(bo)) + return bo; + + ret = devm_add_action_or_reset(xe->drm.dev, __xe_bo_unpin_map_no_vm, bo); + if (ret) + return ERR_PTR(ret); + + return bo; +} + +struct xe_bo *xe_managed_bo_create_from_data(struct xe_device *xe, struct xe_tile *tile, + const void *data, size_t size, u32 flags) +{ + struct xe_bo *bo = xe_managed_bo_create_pin_map(xe, tile, ALIGN(size, PAGE_SIZE), flags); + + if (IS_ERR(bo)) + return bo; + + xe_map_memcpy_to(xe, &bo->vmap, 0, data, size); + + return bo; +} + +/** + * xe_managed_bo_reinit_in_vram + * @xe: xe device + * @tile: Tile where the new buffer will be created + * @src: Managed buffer object allocated in system memory + * + * Replace a managed src buffer object allocated in system memory with a new + * one allocated in vram, copying the data between them. + * Buffer object in VRAM is not going to have the same GGTT address, the caller + * is responsible for making sure that any old references to it are updated. + * + * Returns 0 for success, negative error code otherwise. + */ +int xe_managed_bo_reinit_in_vram(struct xe_device *xe, struct xe_tile *tile, struct xe_bo **src) +{ + struct xe_bo *bo; + u32 dst_flags = XE_BO_FLAG_VRAM_IF_DGFX(tile) | XE_BO_FLAG_GGTT; + + dst_flags |= (*src)->flags & XE_BO_FLAG_GGTT_INVALIDATE; + + xe_assert(xe, IS_DGFX(xe)); + xe_assert(xe, !(*src)->vmap.is_iomem); + + bo = xe_managed_bo_create_from_data(xe, tile, (*src)->vmap.vaddr, + (*src)->size, dst_flags); + if (IS_ERR(bo)) + return PTR_ERR(bo); + + devm_release_action(xe->drm.dev, __xe_bo_unpin_map_no_vm, *src); + *src = bo; + + return 0; +} + +/* + * XXX: This is in the VM bind data path, likely should calculate this once and + * store, with a recalculation if the BO is moved. + */ +uint64_t vram_region_gpu_offset(struct ttm_resource *res) +{ + struct xe_device *xe = ttm_to_xe_device(res->bo->bdev); + + if (res->mem_type == XE_PL_STOLEN) + return xe_ttm_stolen_gpu_offset(xe); + + return res_to_mem_region(res)->dpa_base; +} + +/** + * xe_bo_pin_external - pin an external BO + * @bo: buffer object to be pinned + * + * Pin an external (not tied to a VM, can be exported via dma-buf / prime FD) + * BO. Unique call compared to xe_bo_pin as this function has it own set of + * asserts and code to ensure evict / restore on suspend / resume. + * + * Returns 0 for success, negative error code otherwise. + */ +int xe_bo_pin_external(struct xe_bo *bo) +{ + struct xe_device *xe = xe_bo_device(bo); + int err; + + xe_assert(xe, !bo->vm); + xe_assert(xe, xe_bo_is_user(bo)); + + if (!xe_bo_is_pinned(bo)) { + err = xe_bo_validate(bo, NULL, false); + if (err) + return err; + + if (xe_bo_is_vram(bo)) { + spin_lock(&xe->pinned.lock); + list_add_tail(&bo->pinned_link, + &xe->pinned.external_vram); + spin_unlock(&xe->pinned.lock); + } + } + + ttm_bo_pin(&bo->ttm); + + /* + * FIXME: If we always use the reserve / unreserve functions for locking + * we do not need this. + */ + ttm_bo_move_to_lru_tail_unlocked(&bo->ttm); + + return 0; +} + +int xe_bo_pin(struct xe_bo *bo) +{ + struct ttm_place *place = &bo->placements[0]; + struct xe_device *xe = xe_bo_device(bo); + int err; + + /* We currently don't expect user BO to be pinned */ + xe_assert(xe, !xe_bo_is_user(bo)); + + /* Pinned object must be in GGTT or have pinned flag */ + xe_assert(xe, bo->flags & (XE_BO_FLAG_PINNED | + XE_BO_FLAG_GGTT)); + + /* + * No reason we can't support pinning imported dma-bufs we just don't + * expect to pin an imported dma-buf. + */ + xe_assert(xe, !bo->ttm.base.import_attach); + + /* We only expect at most 1 pin */ + xe_assert(xe, !xe_bo_is_pinned(bo)); + + err = xe_bo_validate(bo, NULL, false); + if (err) + return err; + + /* + * For pinned objects in on DGFX, which are also in vram, we expect + * these to be in contiguous VRAM memory. Required eviction / restore + * during suspend / resume (force restore to same physical address). + */ + if (IS_DGFX(xe) && !(IS_ENABLED(CONFIG_DRM_XE_DEBUG) && + bo->flags & XE_BO_FLAG_INTERNAL_TEST)) { + if (mem_type_is_vram(place->mem_type)) { + xe_assert(xe, place->flags & TTM_PL_FLAG_CONTIGUOUS); + + place->fpfn = (xe_bo_addr(bo, 0, PAGE_SIZE) - + vram_region_gpu_offset(bo->ttm.resource)) >> PAGE_SHIFT; + place->lpfn = place->fpfn + (bo->size >> PAGE_SHIFT); +<<<<<<< + } + } + + if (mem_type_is_vram(place->mem_type) || bo->flags & XE_BO_FLAG_GGTT) { + spin_lock(&xe->pinned.lock); + list_add_tail(&bo->pinned_link, &xe->pinned.kernel_bo_present); + spin_unlock(&xe->pinned.lock); +======= + + spin_lock(&xe->pinned.lock); + list_add_tail(&bo->pinned_link, &xe->pinned.kernel_bo_present); + spin_unlock(&xe->pinned.lock); + } +>>>>>>> + } + + ttm_bo_pin(&bo->ttm); + + /* + * FIXME: If we always use the reserve / unreserve functions for locking + * we do not need this. + */ + ttm_bo_move_to_lru_tail_unlocked(&bo->ttm); + + return 0; +} + +/** + * xe_bo_unpin_external - unpin an external BO + * @bo: buffer object to be unpinned + * + * Unpin an external (not tied to a VM, can be exported via dma-buf / prime FD) + * BO. Unique call compared to xe_bo_unpin as this function has it own set of + * asserts and code to ensure evict / restore on suspend / resume. + * + * Returns 0 for success, negative error code otherwise. + */ +void xe_bo_unpin_external(struct xe_bo *bo) +{ + struct xe_device *xe = xe_bo_device(bo); + + xe_assert(xe, !bo->vm); + xe_assert(xe, xe_bo_is_pinned(bo)); + xe_assert(xe, xe_bo_is_user(bo)); + + spin_lock(&xe->pinned.lock); + if (bo->ttm.pin_count == 1 && !list_empty(&bo->pinned_link)) + list_del_init(&bo->pinned_link); + spin_unlock(&xe->pinned.lock); + + ttm_bo_unpin(&bo->ttm); + + /* + * FIXME: If we always use the reserve / unreserve functions for locking + * we do not need this. + */ + ttm_bo_move_to_lru_tail_unlocked(&bo->ttm); +} + +void xe_bo_unpin(struct xe_bo *bo) +{ + struct ttm_place *place = &bo->placements[0]; + struct xe_device *xe = xe_bo_device(bo); + + xe_assert(xe, !bo->ttm.base.import_attach); + xe_assert(xe, xe_bo_is_pinned(bo)); + +<<<<<<< + if (IS_DGFX(xe) && !(IS_ENABLED(CONFIG_DRM_XE_DEBUG) && + bo->flags & XE_BO_FLAG_INTERNAL_TEST)) { + struct ttm_place *place = &(bo->placements[0]); + + if (mem_type_is_vram(place->mem_type)) { + spin_lock(&xe->pinned.lock); + xe_assert(xe, !list_empty(&bo->pinned_link)); + list_del_init(&bo->pinned_link); + spin_unlock(&xe->pinned.lock); + } +======= + if (mem_type_is_vram(place->mem_type) || bo->flags & XE_BO_FLAG_GGTT) { + spin_lock(&xe->pinned.lock); + xe_assert(xe, !list_empty(&bo->pinned_link)); + list_del_init(&bo->pinned_link); + spin_unlock(&xe->pinned.lock); +>>>>>>> + } + ttm_bo_unpin(&bo->ttm); +} + +/** + * xe_bo_validate() - Make sure the bo is in an allowed placement + * @bo: The bo, + * @vm: Pointer to a the vm the bo shares a locked dma_resv object with, or + * NULL. Used together with @allow_res_evict. + * @allow_res_evict: Whether it's allowed to evict bos sharing @vm's + * reservation object. + * + * Make sure the bo is in allowed placement, migrating it if necessary. If + * needed, other bos will be evicted. If bos selected for eviction shares + * the @vm's reservation object, they can be evicted iff @allow_res_evict is + * set to true, otherwise they will be bypassed. + * + * Return: 0 on success, negative error code on failure. May return + * -EINTR or -ERESTARTSYS if internal waits are interrupted by a signal. + */ +int xe_bo_validate(struct xe_bo *bo, struct xe_vm *vm, bool allow_res_evict) +{ + struct ttm_operation_ctx ctx = { + .interruptible = true, + .no_wait_gpu = false, + }; + + if (vm) { + lockdep_assert_held(&vm->lock); + xe_vm_assert_held(vm); + + ctx.allow_res_evict = allow_res_evict; + ctx.resv = xe_vm_resv(vm); + } + + return ttm_bo_validate(&bo->ttm, &bo->placement, &ctx); +} + +bool xe_bo_is_xe_bo(struct ttm_buffer_object *bo) +{ + if (bo->destroy == &xe_ttm_bo_destroy) + return true; + + return false; +} + +/* + * Resolve a BO address. There is no assert to check if the proper lock is held + * so it should only be used in cases where it is not fatal to get the wrong + * address, such as printing debug information, but not in cases where memory is + * written based on this result. + */ +dma_addr_t __xe_bo_addr(struct xe_bo *bo, u64 offset, size_t page_size) +{ + struct xe_device *xe = xe_bo_device(bo); + struct xe_res_cursor cur; + u64 page; + + xe_assert(xe, page_size <= PAGE_SIZE); + page = offset >> PAGE_SHIFT; + offset &= (PAGE_SIZE - 1); + + if (!xe_bo_is_vram(bo) && !xe_bo_is_stolen(bo)) { + xe_assert(xe, bo->ttm.ttm); + + xe_res_first_sg(xe_bo_sg(bo), page << PAGE_SHIFT, + page_size, &cur); + return xe_res_dma(&cur) + offset; + } else { + struct xe_res_cursor cur; + + xe_res_first(bo->ttm.resource, page << PAGE_SHIFT, + page_size, &cur); + return cur.start + offset + vram_region_gpu_offset(bo->ttm.resource); + } +} + +dma_addr_t xe_bo_addr(struct xe_bo *bo, u64 offset, size_t page_size) +{ + if (!READ_ONCE(bo->ttm.pin_count)) + xe_bo_assert_held(bo); + return __xe_bo_addr(bo, offset, page_size); +} + +int xe_bo_vmap(struct xe_bo *bo) +{ + void *virtual; + bool is_iomem; + int ret; + + xe_bo_assert_held(bo); + + if (!(bo->flags & XE_BO_FLAG_NEEDS_CPU_ACCESS)) + return -EINVAL; + + if (!iosys_map_is_null(&bo->vmap)) + return 0; + + /* + * We use this more or less deprecated interface for now since + * ttm_bo_vmap() doesn't offer the optimization of kmapping + * single page bos, which is done here. + * TODO: Fix up ttm_bo_vmap to do that, or fix up ttm_bo_kmap + * to use struct iosys_map. + */ + ret = ttm_bo_kmap(&bo->ttm, 0, bo->size >> PAGE_SHIFT, &bo->kmap); + if (ret) + return ret; + + virtual = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); + if (is_iomem) + iosys_map_set_vaddr_iomem(&bo->vmap, (void __iomem *)virtual); + else + iosys_map_set_vaddr(&bo->vmap, virtual); + + return 0; +} + +static void __xe_bo_vunmap(struct xe_bo *bo) +{ + if (!iosys_map_is_null(&bo->vmap)) { + iosys_map_clear(&bo->vmap); + ttm_bo_kunmap(&bo->kmap); + } +} + +void xe_bo_vunmap(struct xe_bo *bo) +{ + xe_bo_assert_held(bo); + __xe_bo_vunmap(bo); +} + +int xe_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct xe_device *xe = to_xe_device(dev); + struct xe_file *xef = to_xe_file(file); + struct drm_xe_gem_create *args = data; + struct xe_vm *vm = NULL; + struct xe_bo *bo; + unsigned int bo_flags; + u32 handle; + int err; + + if (XE_IOCTL_DBG(xe, args->extensions) || + XE_IOCTL_DBG(xe, args->pad[0] || args->pad[1] || args->pad[2]) || + XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1])) + return -EINVAL; + + /* at least one valid memory placement must be specified */ + if (XE_IOCTL_DBG(xe, (args->placement & ~xe->info.mem_region_mask) || + !args->placement)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, args->flags & + ~(DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING | + DRM_XE_GEM_CREATE_FLAG_SCANOUT | + DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM))) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, args->handle)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, !args->size)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, args->size > SIZE_MAX)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, args->size & ~PAGE_MASK)) + return -EINVAL; + + bo_flags = 0; + if (args->flags & DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING) + bo_flags |= XE_BO_FLAG_DEFER_BACKING; + + if (args->flags & DRM_XE_GEM_CREATE_FLAG_SCANOUT) + bo_flags |= XE_BO_FLAG_SCANOUT; + + bo_flags |= args->placement << (ffs(XE_BO_FLAG_SYSTEM) - 1); + + if (args->flags & DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM) { + if (XE_IOCTL_DBG(xe, !(bo_flags & XE_BO_FLAG_VRAM_MASK))) + return -EINVAL; + + bo_flags |= XE_BO_FLAG_NEEDS_CPU_ACCESS; + } + + if (XE_IOCTL_DBG(xe, !args->cpu_caching || + args->cpu_caching > DRM_XE_GEM_CPU_CACHING_WC)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, bo_flags & XE_BO_FLAG_VRAM_MASK && + args->cpu_caching != DRM_XE_GEM_CPU_CACHING_WC)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, bo_flags & XE_BO_FLAG_SCANOUT && + args->cpu_caching == DRM_XE_GEM_CPU_CACHING_WB)) + return -EINVAL; + + if (args->vm_id) { + vm = xe_vm_lookup(xef, args->vm_id); + if (XE_IOCTL_DBG(xe, !vm)) + return -ENOENT; + err = xe_vm_lock(vm, true); + if (err) + goto out_vm; + } + + bo = xe_bo_create_user(xe, NULL, vm, args->size, args->cpu_caching, + ttm_bo_type_device, bo_flags); + + if (vm) + xe_vm_unlock(vm); + + if (IS_ERR(bo)) { + err = PTR_ERR(bo); + goto out_vm; + } + + err = drm_gem_handle_create(file, &bo->ttm.base, &handle); + if (err) + goto out_bulk; + + args->handle = handle; + goto out_put; + +out_bulk: + if (vm && !xe_vm_in_fault_mode(vm)) { + xe_vm_lock(vm, false); + __xe_bo_unset_bulk_move(bo); + xe_vm_unlock(vm); + } +out_put: + xe_bo_put(bo); +out_vm: + if (vm) + xe_vm_put(vm); + + return err; +} + +int xe_gem_mmap_offset_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct xe_device *xe = to_xe_device(dev); + struct drm_xe_gem_mmap_offset *args = data; + struct drm_gem_object *gem_obj; + + if (XE_IOCTL_DBG(xe, args->extensions) || + XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1])) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, args->flags)) + return -EINVAL; + + gem_obj = drm_gem_object_lookup(file, args->handle); + if (XE_IOCTL_DBG(xe, !gem_obj)) + return -ENOENT; + + /* The mmap offset was set up at BO allocation time. */ + args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node); + + xe_bo_put(gem_to_xe_bo(gem_obj)); + return 0; +} + +/** + * xe_bo_lock() - Lock the buffer object's dma_resv object + * @bo: The struct xe_bo whose lock is to be taken + * @intr: Whether to perform any wait interruptible + * + * Locks the buffer object's dma_resv object. If the buffer object is + * pointing to a shared dma_resv object, that shared lock is locked. + * + * Return: 0 on success, -EINTR if @intr is true and the wait for a + * contended lock was interrupted. If @intr is set to false, the + * function always returns 0. + */ +int xe_bo_lock(struct xe_bo *bo, bool intr) +{ + if (intr) + return dma_resv_lock_interruptible(bo->ttm.base.resv, NULL); + + dma_resv_lock(bo->ttm.base.resv, NULL); + + return 0; +} + +/** + * xe_bo_unlock() - Unlock the buffer object's dma_resv object + * @bo: The struct xe_bo whose lock is to be released. + * + * Unlock a buffer object lock that was locked by xe_bo_lock(). + */ +void xe_bo_unlock(struct xe_bo *bo) +{ + dma_resv_unlock(bo->ttm.base.resv); +} + +/** + * xe_bo_can_migrate - Whether a buffer object likely can be migrated + * @bo: The buffer object to migrate + * @mem_type: The TTM memory type intended to migrate to + * + * Check whether the buffer object supports migration to the + * given memory type. Note that pinning may affect the ability to migrate as + * returned by this function. + * + * This function is primarily intended as a helper for checking the + * possibility to migrate buffer objects and can be called without + * the object lock held. + * + * Return: true if migration is possible, false otherwise. + */ +bool xe_bo_can_migrate(struct xe_bo *bo, u32 mem_type) +{ + unsigned int cur_place; + + if (bo->ttm.type == ttm_bo_type_kernel) + return true; + + if (bo->ttm.type == ttm_bo_type_sg) + return false; + + for (cur_place = 0; cur_place < bo->placement.num_placement; + cur_place++) { + if (bo->placements[cur_place].mem_type == mem_type) + return true; + } + + return false; +} + +static void xe_place_from_ttm_type(u32 mem_type, struct ttm_place *place) +{ + memset(place, 0, sizeof(*place)); + place->mem_type = mem_type; +} + +/** + * xe_bo_migrate - Migrate an object to the desired region id + * @bo: The buffer object to migrate. + * @mem_type: The TTM region type to migrate to. + * + * Attempt to migrate the buffer object to the desired memory region. The + * buffer object may not be pinned, and must be locked. + * On successful completion, the object memory type will be updated, + * but an async migration task may not have completed yet, and to + * accomplish that, the object's kernel fences must be signaled with + * the object lock held. + * + * Return: 0 on success. Negative error code on failure. In particular may + * return -EINTR or -ERESTARTSYS if signal pending. + */ +int xe_bo_migrate(struct xe_bo *bo, u32 mem_type) +{ + struct xe_device *xe = ttm_to_xe_device(bo->ttm.bdev); + struct ttm_operation_ctx ctx = { + .interruptible = true, + .no_wait_gpu = false, + }; + struct ttm_placement placement; + struct ttm_place requested; + + xe_bo_assert_held(bo); + + if (bo->ttm.resource->mem_type == mem_type) + return 0; + + if (xe_bo_is_pinned(bo)) + return -EBUSY; + + if (!xe_bo_can_migrate(bo, mem_type)) + return -EINVAL; + + xe_place_from_ttm_type(mem_type, &requested); + placement.num_placement = 1; + placement.placement = &requested; + + /* + * Stolen needs to be handled like below VRAM handling if we ever need + * to support it. + */ + drm_WARN_ON(&xe->drm, mem_type == XE_PL_STOLEN); + + if (mem_type_is_vram(mem_type)) { + u32 c = 0; + + add_vram(xe, bo, &requested, bo->flags, mem_type, &c); + } + + return ttm_bo_validate(&bo->ttm, &placement, &ctx); +} + +/** + * xe_bo_evict - Evict an object to evict placement + * @bo: The buffer object to migrate. + * @force_alloc: Set force_alloc in ttm_operation_ctx + * + * On successful completion, the object memory will be moved to evict + * placement. Ths function blocks until the object has been fully moved. + * + * Return: 0 on success. Negative error code on failure. + */ +int xe_bo_evict(struct xe_bo *bo, bool force_alloc) +{ + struct ttm_operation_ctx ctx = { + .interruptible = false, + .no_wait_gpu = false, + .force_alloc = force_alloc, + }; + struct ttm_placement placement; + int ret; + + xe_evict_flags(&bo->ttm, &placement); + ret = ttm_bo_validate(&bo->ttm, &placement, &ctx); + if (ret) + return ret; + + dma_resv_wait_timeout(bo->ttm.base.resv, DMA_RESV_USAGE_KERNEL, + false, MAX_SCHEDULE_TIMEOUT); + + return 0; +} + +/** + * xe_bo_needs_ccs_pages - Whether a bo needs to back up CCS pages when + * placed in system memory. + * @bo: The xe_bo + * + * Return: true if extra pages need to be allocated, false otherwise. + */ +bool xe_bo_needs_ccs_pages(struct xe_bo *bo) +{ + struct xe_device *xe = xe_bo_device(bo); + + if (GRAPHICS_VER(xe) >= 20 && IS_DGFX(xe)) + return false; + + if (!xe_device_has_flat_ccs(xe) || bo->ttm.type != ttm_bo_type_device) + return false; + + /* On discrete GPUs, if the GPU can access this buffer from + * system memory (i.e., it allows XE_PL_TT placement), FlatCCS + * can't be used since there's no CCS storage associated with + * non-VRAM addresses. + */ + if (IS_DGFX(xe) && (bo->flags & XE_BO_FLAG_SYSTEM)) + return false; + + return true; +} + +/** + * __xe_bo_release_dummy() - Dummy kref release function + * @kref: The embedded struct kref. + * + * Dummy release function for xe_bo_put_deferred(). Keep off. + */ +void __xe_bo_release_dummy(struct kref *kref) +{ +} + +/** + * xe_bo_put_commit() - Put bos whose put was deferred by xe_bo_put_deferred(). + * @deferred: The lockless list used for the call to xe_bo_put_deferred(). + * + * Puts all bos whose put was deferred by xe_bo_put_deferred(). + * The @deferred list can be either an onstack local list or a global + * shared list used by a workqueue. + */ +void xe_bo_put_commit(struct llist_head *deferred) +{ + struct llist_node *freed; + struct xe_bo *bo, *next; + + if (!deferred) + return; + + freed = llist_del_all(deferred); + if (!freed) + return; + + llist_for_each_entry_safe(bo, next, freed, freed) + drm_gem_object_free(&bo->ttm.base.refcount); +} + +/** + * xe_bo_dumb_create - Create a dumb bo as backing for a fb + * @file_priv: ... + * @dev: ... + * @args: ... + * + * See dumb_create() hook in include/drm/drm_drv.h + * + * Return: ... + */ +int xe_bo_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct xe_device *xe = to_xe_device(dev); + struct xe_bo *bo; + uint32_t handle; + int cpp = DIV_ROUND_UP(args->bpp, 8); + int err; + u32 page_size = max_t(u32, PAGE_SIZE, + xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K : SZ_4K); + + args->pitch = ALIGN(args->width * cpp, 64); + args->size = ALIGN(mul_u32_u32(args->pitch, args->height), + page_size); + + bo = xe_bo_create_user(xe, NULL, NULL, args->size, + DRM_XE_GEM_CPU_CACHING_WC, + ttm_bo_type_device, + XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) | + XE_BO_FLAG_SCANOUT | + XE_BO_FLAG_NEEDS_CPU_ACCESS); + if (IS_ERR(bo)) + return PTR_ERR(bo); + + err = drm_gem_handle_create(file_priv, &bo->ttm.base, &handle); + /* drop reference from allocate - handle holds it now */ + drm_gem_object_put(&bo->ttm.base); + if (!err) + args->handle = handle; + return err; +} + +void xe_bo_runtime_pm_release_mmap_offset(struct xe_bo *bo) +{ + struct ttm_buffer_object *tbo = &bo->ttm; + struct ttm_device *bdev = tbo->bdev; + + drm_vma_node_unmap(&tbo->base.vma_node, bdev->dev_mapping); + + list_del_init(&bo->vram_userfault_link); +} + +#if IS_ENABLED(CONFIG_DRM_XE_KUNIT_TEST) +#include "tests/xe_bo.c" +#endif |