/* * Copyright 2016 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Christian König */ #include #include #include "amdgpu.h" #include "amdgpu_vm.h" #include "amdgpu_res_cursor.h" #include "amdgpu_atomfirmware.h" #include "atom.h" struct amdgpu_vram_reservation { u64 start; u64 size; struct list_head allocated; struct list_head blocks; }; static inline struct amdgpu_vram_mgr * to_vram_mgr(struct ttm_resource_manager *man) { return container_of(man, struct amdgpu_vram_mgr, manager); } static inline struct amdgpu_device * to_amdgpu_device(struct amdgpu_vram_mgr *mgr) { return container_of(mgr, struct amdgpu_device, mman.vram_mgr); } static inline struct drm_buddy_block * amdgpu_vram_mgr_first_block(struct list_head *list) { return list_first_entry_or_null(list, struct drm_buddy_block, link); } static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head) { struct drm_buddy_block *block; u64 start, size; block = amdgpu_vram_mgr_first_block(head); if (!block) return false; while (head != block->link.next) { start = amdgpu_vram_mgr_block_start(block); size = amdgpu_vram_mgr_block_size(block); block = list_entry(block->link.next, struct drm_buddy_block, link); if (start + size != amdgpu_vram_mgr_block_start(block)) return false; } return true; } /** * DOC: mem_info_vram_total * * The amdgpu driver provides a sysfs API for reporting current total VRAM * available on the device * The file mem_info_vram_total is used for this and returns the total * amount of VRAM in bytes */ static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev, struct device_attribute *attr, char *buf) { struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = drm_to_adev(ddev); return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size); } /** * DOC: mem_info_vis_vram_total * * The amdgpu driver provides a sysfs API for reporting current total * visible VRAM available on the device * The file mem_info_vis_vram_total is used for this and returns the total * amount of visible VRAM in bytes */ static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev, struct device_attribute *attr, char *buf) { struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = drm_to_adev(ddev); return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size); } /** * DOC: mem_info_vram_used * * The amdgpu driver provides a sysfs API for reporting current total VRAM * available on the device * The file mem_info_vram_used is used for this and returns the total * amount of currently used VRAM in bytes */ static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev, struct device_attribute *attr, char *buf) { struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = drm_to_adev(ddev); struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager; return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man)); } /** * DOC: mem_info_vis_vram_used * * The amdgpu driver provides a sysfs API for reporting current total of * used visible VRAM * The file mem_info_vis_vram_used is used for this and returns the total * amount of currently used visible VRAM in bytes */ static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev, struct device_attribute *attr, char *buf) { struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = drm_to_adev(ddev); return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr)); } /** * DOC: mem_info_vram_vendor * * The amdgpu driver provides a sysfs API for reporting the vendor of the * installed VRAM * The file mem_info_vram_vendor is used for this and returns the name of the * vendor. */ static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev, struct device_attribute *attr, char *buf) { struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = drm_to_adev(ddev); switch (adev->gmc.vram_vendor) { case SAMSUNG: return sysfs_emit(buf, "samsung\n"); case INFINEON: return sysfs_emit(buf, "infineon\n"); case ELPIDA: return sysfs_emit(buf, "elpida\n"); case ETRON: return sysfs_emit(buf, "etron\n"); case NANYA: return sysfs_emit(buf, "nanya\n"); case HYNIX: return sysfs_emit(buf, "hynix\n"); case MOSEL: return sysfs_emit(buf, "mosel\n"); case WINBOND: return sysfs_emit(buf, "winbond\n"); case ESMT: return sysfs_emit(buf, "esmt\n"); case MICRON: return sysfs_emit(buf, "micron\n"); default: return sysfs_emit(buf, "unknown\n"); } } static DEVICE_ATTR(mem_info_vram_total, S_IRUGO, amdgpu_mem_info_vram_total_show, NULL); static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO, amdgpu_mem_info_vis_vram_total_show,NULL); static DEVICE_ATTR(mem_info_vram_used, S_IRUGO, amdgpu_mem_info_vram_used_show, NULL); static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO, amdgpu_mem_info_vis_vram_used_show, NULL); static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO, amdgpu_mem_info_vram_vendor, NULL); static struct attribute *amdgpu_vram_mgr_attributes[] = { &dev_attr_mem_info_vram_total.attr, &dev_attr_mem_info_vis_vram_total.attr, &dev_attr_mem_info_vram_used.attr, &dev_attr_mem_info_vis_vram_used.attr, &dev_attr_mem_info_vram_vendor.attr, NULL }; const struct attribute_group amdgpu_vram_mgr_attr_group = { .attrs = amdgpu_vram_mgr_attributes }; /** * amdgpu_vram_mgr_vis_size - Calculate visible block size * * @adev: amdgpu_device pointer * @block: DRM BUDDY block structure * * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM */ static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev, struct drm_buddy_block *block) { u64 start = amdgpu_vram_mgr_block_start(block); u64 end = start + amdgpu_vram_mgr_block_size(block); if (start >= adev->gmc.visible_vram_size) return 0; return (end > adev->gmc.visible_vram_size ? adev->gmc.visible_vram_size : end) - start; } /** * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size * * @bo: &amdgpu_bo buffer object (must be in VRAM) * * Returns: * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM. */ u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo) { struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); struct ttm_resource *res = bo->tbo.resource; struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res); struct drm_buddy_block *block; u64 usage = 0; if (amdgpu_gmc_vram_full_visible(&adev->gmc)) return amdgpu_bo_size(bo); if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT) return 0; list_for_each_entry(block, &vres->blocks, link) usage += amdgpu_vram_mgr_vis_size(adev, block); return usage; } /* Commit the reservation of VRAM pages */ static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man) { struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); struct amdgpu_device *adev = to_amdgpu_device(mgr); struct drm_buddy *mm = &mgr->mm; struct amdgpu_vram_reservation *rsv, *temp; struct drm_buddy_block *block; uint64_t vis_usage; list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) { if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size, rsv->size, mm->chunk_size, &rsv->allocated, DRM_BUDDY_RANGE_ALLOCATION)) continue; block = amdgpu_vram_mgr_first_block(&rsv->allocated); if (!block) continue; dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n", rsv->start, rsv->size); vis_usage = amdgpu_vram_mgr_vis_size(adev, block); atomic64_add(vis_usage, &mgr->vis_usage); spin_lock(&man->bdev->lru_lock); man->usage += rsv->size; spin_unlock(&man->bdev->lru_lock); list_move(&rsv->blocks, &mgr->reserved_pages); } } /** * amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM * * @mgr: amdgpu_vram_mgr pointer * @start: start address of the range in VRAM * @size: size of the range * * Reserve memory from start address with the specified size in VRAM */ int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr, uint64_t start, uint64_t size) { struct amdgpu_vram_reservation *rsv; rsv = kzalloc(sizeof(*rsv), GFP_KERNEL); if (!rsv) return -ENOMEM; INIT_LIST_HEAD(&rsv->allocated); INIT_LIST_HEAD(&rsv->blocks); rsv->start = start; rsv->size = size; mutex_lock(&mgr->lock); list_add_tail(&rsv->blocks, &mgr->reservations_pending); amdgpu_vram_mgr_do_reserve(&mgr->manager); mutex_unlock(&mgr->lock); return 0; } /** * amdgpu_vram_mgr_query_page_status - query the reservation status * * @mgr: amdgpu_vram_mgr pointer * @start: start address of a page in VRAM * * Returns: * -EBUSY: the page is still hold and in pending list * 0: the page has been reserved * -ENOENT: the input page is not a reservation */ int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr, uint64_t start) { struct amdgpu_vram_reservation *rsv; int ret; mutex_lock(&mgr->lock); list_for_each_entry(rsv, &mgr->reservations_pending, blocks) { if (rsv->start <= start && (start < (rsv->start + rsv->size))) { ret = -EBUSY; goto out; } } list_for_each_entry(rsv, &mgr->reserved_pages, blocks) { if (rsv->start <= start && (start < (rsv->start + rsv->size))) { ret = 0; goto out; } } ret = -ENOENT; out: mutex_unlock(&mgr->lock); return ret; } /** * amdgpu_vram_mgr_new - allocate new ranges * * @man: TTM memory type manager * @tbo: TTM BO we need this range for * @place: placement flags and restrictions * @res: the resulting mem object * * Allocate VRAM for the given BO. */ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, struct ttm_buffer_object *tbo, const struct ttm_place *place, struct ttm_resource **res) { u64 vis_usage = 0, max_bytes, cur_size, min_block_size; struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); struct amdgpu_device *adev = to_amdgpu_device(mgr); struct amdgpu_vram_mgr_resource *vres; u64 size, remaining_size, lpfn, fpfn; struct drm_buddy *mm = &mgr->mm; struct drm_buddy_block *block; unsigned long pages_per_block; int r; lpfn = (u64)place->lpfn << PAGE_SHIFT; if (!lpfn) lpfn = man->size; fpfn = (u64)place->fpfn << PAGE_SHIFT; max_bytes = adev->gmc.mc_vram_size; if (tbo->type != ttm_bo_type_kernel) max_bytes -= AMDGPU_VM_RESERVED_VRAM; if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { pages_per_block = ~0ul; } else { #ifdef CONFIG_TRANSPARENT_HUGEPAGE pages_per_block = HPAGE_PMD_NR; #else /* default to 2MB */ pages_per_block = 2UL << (20UL - PAGE_SHIFT); #endif pages_per_block = max_t(uint32_t, pages_per_block, tbo->page_alignment); } vres = kzalloc(sizeof(*vres), GFP_KERNEL); if (!vres) return -ENOMEM; ttm_resource_init(tbo, place, &vres->base); /* bail out quickly if there's likely not enough VRAM for this BO */ if (ttm_resource_manager_usage(man) > max_bytes) { r = -ENOSPC; goto error_fini; } INIT_LIST_HEAD(&vres->blocks); if (place->flags & TTM_PL_FLAG_TOPDOWN) vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION; if (fpfn || lpfn != mgr->mm.size) /* Allocate blocks in desired range */ vres->flags |= DRM_BUDDY_RANGE_ALLOCATION; remaining_size = (u64)vres->base.size; mutex_lock(&mgr->lock); while (remaining_size) { if (tbo->page_alignment) min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT; else min_block_size = mgr->default_page_size; BUG_ON(min_block_size < mm->chunk_size); /* Limit maximum size to 2GiB due to SG table limitations */ size = min(remaining_size, 2ULL << 30); if ((size >= (u64)pages_per_block << PAGE_SHIFT) && !(size & (((u64)pages_per_block << PAGE_SHIFT) - 1))) min_block_size = (u64)pages_per_block << PAGE_SHIFT; cur_size = size; if (fpfn + size != (u64)place->lpfn << PAGE_SHIFT) { /* * Except for actual range allocation, modify the size and * min_block_size conforming to continuous flag enablement */ if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { size = roundup_pow_of_two(size); min_block_size = size; /* * Modify the size value if size is not * aligned with min_block_size */ } else if (!IS_ALIGNED(size, min_block_size)) { size = round_up(size, min_block_size); } } r = drm_buddy_alloc_blocks(mm, fpfn, lpfn, size, min_block_size, &vres->blocks, vres->flags); if (unlikely(r)) goto error_free_blocks; if (size > remaining_size) remaining_size = 0; else remaining_size -= size; } mutex_unlock(&mgr->lock); if (cur_size != size) { struct drm_buddy_block *block; struct list_head *trim_list; u64 original_size; LIST_HEAD(temp); trim_list = &vres->blocks; original_size = (u64)vres->base.size; /* * If size value is rounded up to min_block_size, trim the last * block to the required size */ if (!list_is_singular(&vres->blocks)) { block = list_last_entry(&vres->blocks, typeof(*block), link); list_move_tail(&block->link, &temp); trim_list = &temp; /* * Compute the original_size value by subtracting the * last block size with (aligned size - original size) */ original_size = amdgpu_vram_mgr_block_size(block) - (size - cur_size); } mutex_lock(&mgr->lock); drm_buddy_block_trim(mm, original_size, trim_list); mutex_unlock(&mgr->lock); if (!list_empty(&temp)) list_splice_tail(trim_list, &vres->blocks); } vres->base.start = 0; list_for_each_entry(block, &vres->blocks, link) { unsigned long start; start = amdgpu_vram_mgr_block_start(block) + amdgpu_vram_mgr_block_size(block); start >>= PAGE_SHIFT; if (start > PFN_UP(vres->base.size)) start -= PFN_UP(vres->base.size); else start = 0; vres->base.start = max(vres->base.start, start); vis_usage += amdgpu_vram_mgr_vis_size(adev, block); } if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks)) vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS; if (adev->gmc.xgmi.connected_to_cpu) vres->base.bus.caching = ttm_cached; else vres->base.bus.caching = ttm_write_combined; atomic64_add(vis_usage, &mgr->vis_usage); *res = &vres->base; return 0; error_free_blocks: drm_buddy_free_list(mm, &vres->blocks); mutex_unlock(&mgr->lock); error_fini: ttm_resource_fini(man, &vres->base); kfree(vres); return r; } /** * amdgpu_vram_mgr_del - free ranges * * @man: TTM memory type manager * @res: TTM memory object * * Free the allocated VRAM again. */ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man, struct ttm_resource *res) { struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res); struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); struct amdgpu_device *adev = to_amdgpu_device(mgr); struct drm_buddy *mm = &mgr->mm; struct drm_buddy_block *block; uint64_t vis_usage = 0; mutex_lock(&mgr->lock); list_for_each_entry(block, &vres->blocks, link) vis_usage += amdgpu_vram_mgr_vis_size(adev, block); amdgpu_vram_mgr_do_reserve(man); drm_buddy_free_list(mm, &vres->blocks); mutex_unlock(&mgr->lock); atomic64_sub(vis_usage, &mgr->vis_usage); ttm_resource_fini(man, res); kfree(vres); } /** * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table * * @adev: amdgpu device pointer * @res: TTM memory object * @offset: byte offset from the base of VRAM BO * @length: number of bytes to export in sg_table * @dev: the other device * @dir: dma direction * @sgt: resulting sg table * * Allocate and fill a sg table from a VRAM allocation. */ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, struct ttm_resource *res, u64 offset, u64 length, struct device *dev, enum dma_data_direction dir, struct sg_table **sgt) { struct amdgpu_res_cursor cursor; struct scatterlist *sg; int num_entries = 0; int i, r; *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL); if (!*sgt) return -ENOMEM; /* Determine the number of DRM_BUDDY blocks to export */ amdgpu_res_first(res, offset, length, &cursor); while (cursor.remaining) { num_entries++; amdgpu_res_next(&cursor, cursor.size); } r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL); if (r) goto error_free; /* Initialize scatterlist nodes of sg_table */ for_each_sgtable_sg((*sgt), sg, i) sg->length = 0; /* * Walk down DRM_BUDDY blocks to populate scatterlist nodes * @note: Use iterator api to get first the DRM_BUDDY block * and the number of bytes from it. Access the following * DRM_BUDDY block(s) if more buffer needs to exported */ amdgpu_res_first(res, offset, length, &cursor); for_each_sgtable_sg((*sgt), sg, i) { phys_addr_t phys = cursor.start + adev->gmc.aper_base; size_t size = cursor.size; dma_addr_t addr; addr = dma_map_resource(dev, phys, size, dir, DMA_ATTR_SKIP_CPU_SYNC); r = dma_mapping_error(dev, addr); if (r) goto error_unmap; sg_set_page(sg, NULL, size, 0); sg_dma_address(sg) = addr; sg_dma_len(sg) = size; amdgpu_res_next(&cursor, cursor.size); } return 0; error_unmap: for_each_sgtable_sg((*sgt), sg, i) { if (!sg->length) continue; dma_unmap_resource(dev, sg->dma_address, sg->length, dir, DMA_ATTR_SKIP_CPU_SYNC); } sg_free_table(*sgt); error_free: kfree(*sgt); return r; } /** * amdgpu_vram_mgr_free_sgt - allocate and fill a sg table * * @dev: device pointer * @dir: data direction of resource to unmap * @sgt: sg table to free * * Free a previously allocate sg table. */ void amdgpu_vram_mgr_free_sgt(struct device *dev, enum dma_data_direction dir, struct sg_table *sgt) { struct scatterlist *sg; int i; for_each_sgtable_sg(sgt, sg, i) dma_unmap_resource(dev, sg->dma_address, sg->length, dir, DMA_ATTR_SKIP_CPU_SYNC); sg_free_table(sgt); kfree(sgt); } /** * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part * * @mgr: amdgpu_vram_mgr pointer * * Returns how many bytes are used in the visible part of VRAM */ uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr) { return atomic64_read(&mgr->vis_usage); } /** * amdgpu_vram_mgr_intersects - test each drm buddy block for intersection * * @man: TTM memory type manager * @res: The resource to test * @place: The place to test against * @size: Size of the new allocation * * Test each drm buddy block for intersection for eviction decision. */ static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man, struct ttm_resource *res, const struct ttm_place *place, size_t size) { struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res); struct drm_buddy_block *block; /* Check each drm buddy block individually */ list_for_each_entry(block, &mgr->blocks, link) { unsigned long fpfn = amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT; unsigned long lpfn = fpfn + (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT); if (place->fpfn < lpfn && (!place->lpfn || place->lpfn > fpfn)) return true; } return false; } /** * amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility * * @man: TTM memory type manager * @res: The resource to test * @place: The place to test against * @size: Size of the new allocation * * Test each drm buddy block for placement compatibility. */ static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man, struct ttm_resource *res, const struct ttm_place *place, size_t size) { struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res); struct drm_buddy_block *block; /* Check each drm buddy block individually */ list_for_each_entry(block, &mgr->blocks, link) { unsigned long fpfn = amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT; unsigned long lpfn = fpfn + (amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT); if (fpfn < place->fpfn || (place->lpfn && lpfn > place->lpfn)) return false; } return true; } /** * amdgpu_vram_mgr_debug - dump VRAM table * * @man: TTM memory type manager * @printer: DRM printer to use * * Dump the table content using printk. */ static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man, struct drm_printer *printer) { struct amdgpu_vram_mgr *mgr = to_vram_mgr(man); struct drm_buddy *mm = &mgr->mm; struct amdgpu_vram_reservation *rsv; drm_printf(printer, " vis usage:%llu\n", amdgpu_vram_mgr_vis_usage(mgr)); mutex_lock(&mgr->lock); drm_printf(printer, "default_page_size: %lluKiB\n", mgr->default_page_size >> 10); drm_buddy_print(mm, printer); drm_printf(printer, "reserved:\n"); list_for_each_entry(rsv, &mgr->reserved_pages, blocks) drm_printf(printer, "%#018llx-%#018llx: %llu\n", rsv->start, rsv->start + rsv->size, rsv->size); mutex_unlock(&mgr->lock); } static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = { .alloc = amdgpu_vram_mgr_new, .free = amdgpu_vram_mgr_del, .intersects = amdgpu_vram_mgr_intersects, .compatible = amdgpu_vram_mgr_compatible, .debug = amdgpu_vram_mgr_debug }; /** * amdgpu_vram_mgr_init - init VRAM manager and DRM MM * * @adev: amdgpu_device pointer * * Allocate and initialize the VRAM manager. */ int amdgpu_vram_mgr_init(struct amdgpu_device *adev) { struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; struct ttm_resource_manager *man = &mgr->manager; int err; ttm_resource_manager_init(man, &adev->mman.bdev, adev->gmc.real_vram_size); man->func = &amdgpu_vram_mgr_func; err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE); if (err) return err; mutex_init(&mgr->lock); INIT_LIST_HEAD(&mgr->reservations_pending); INIT_LIST_HEAD(&mgr->reserved_pages); mgr->default_page_size = PAGE_SIZE; ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager); ttm_resource_manager_set_used(man, true); return 0; } /** * amdgpu_vram_mgr_fini - free and destroy VRAM manager * * @adev: amdgpu_device pointer * * Destroy and free the VRAM manager, returns -EBUSY if ranges are still * allocated inside it. */ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev) { struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr; struct ttm_resource_manager *man = &mgr->manager; int ret; struct amdgpu_vram_reservation *rsv, *temp; ttm_resource_manager_set_used(man, false); ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); if (ret) return; mutex_lock(&mgr->lock); list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) kfree(rsv); list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) { drm_buddy_free_list(&mgr->mm, &rsv->allocated); kfree(rsv); } drm_buddy_fini(&mgr->mm); mutex_unlock(&mgr->lock); ttm_resource_manager_cleanup(man); ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL); }