diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c new file mode 100644 index 000000000..c7085a747 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -0,0 +1,948 @@ +/* + * 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 <linux/dma-mapping.h> +#include <drm/ttm/ttm_range_manager.h> + +#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; +} + +static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man, + struct drm_printer *printer) +{ + DRM_DEBUG_DRIVER("Dummy vram mgr debug\n"); +} + +static bool amdgpu_dummy_vram_mgr_compatible(struct ttm_resource_manager *man, + struct ttm_resource *res, + const struct ttm_place *place, + size_t size) +{ + DRM_DEBUG_DRIVER("Dummy vram mgr compatible\n"); + return false; +} + +static bool amdgpu_dummy_vram_mgr_intersects(struct ttm_resource_manager *man, + struct ttm_resource *res, + const struct ttm_place *place, + size_t size) +{ + DRM_DEBUG_DRIVER("Dummy vram mgr intersects\n"); + return true; +} + +static void amdgpu_dummy_vram_mgr_del(struct ttm_resource_manager *man, + struct ttm_resource *res) +{ + DRM_DEBUG_DRIVER("Dummy vram mgr deleted\n"); +} + +static int amdgpu_dummy_vram_mgr_new(struct ttm_resource_manager *man, + struct ttm_buffer_object *tbo, + const struct ttm_place *place, + struct ttm_resource **res) +{ + DRM_DEBUG_DRIVER("Dummy vram mgr new\n"); + return -ENOSPC; +} + +/** + * 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_dummy_vram_mgr_func = { + .alloc = amdgpu_dummy_vram_mgr_new, + .free = amdgpu_dummy_vram_mgr_del, + .intersects = amdgpu_dummy_vram_mgr_intersects, + .compatible = amdgpu_dummy_vram_mgr_compatible, + .debug = amdgpu_dummy_vram_mgr_debug +}; + +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); + + mutex_init(&mgr->lock); + INIT_LIST_HEAD(&mgr->reservations_pending); + INIT_LIST_HEAD(&mgr->reserved_pages); + mgr->default_page_size = PAGE_SIZE; + + if (!adev->gmc.is_app_apu) { + man->func = &amdgpu_vram_mgr_func; + + err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE); + if (err) + return err; + } else { + man->func = &amdgpu_dummy_vram_mgr_func; + DRM_INFO("Setup dummy vram mgr\n"); + } + + 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); + } + if (!adev->gmc.is_app_apu) + 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); +} |