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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c new file mode 100644 index 0000000000..44367f0331 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c @@ -0,0 +1,324 @@ +/* + * 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 <drm/ttm/ttm_range_manager.h> + +#include "amdgpu.h" + +static inline struct amdgpu_gtt_mgr * +to_gtt_mgr(struct ttm_resource_manager *man) +{ + return container_of(man, struct amdgpu_gtt_mgr, manager); +} + +/** + * DOC: mem_info_gtt_total + * + * The amdgpu driver provides a sysfs API for reporting current total size of + * the GTT. + * The file mem_info_gtt_total is used for this, and returns the total size of + * the GTT block, in bytes + */ +static ssize_t amdgpu_mem_info_gtt_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); + struct ttm_resource_manager *man; + + man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT); + return sysfs_emit(buf, "%llu\n", man->size); +} + +/** + * DOC: mem_info_gtt_used + * + * The amdgpu driver provides a sysfs API for reporting current total amount of + * used GTT. + * The file mem_info_gtt_used is used for this, and returns the current used + * size of the GTT block, in bytes + */ +static ssize_t amdgpu_mem_info_gtt_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.gtt_mgr.manager; + + return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man)); +} + +static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO, + amdgpu_mem_info_gtt_total_show, NULL); +static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO, + amdgpu_mem_info_gtt_used_show, NULL); + +static struct attribute *amdgpu_gtt_mgr_attributes[] = { + &dev_attr_mem_info_gtt_total.attr, + &dev_attr_mem_info_gtt_used.attr, + NULL +}; + +const struct attribute_group amdgpu_gtt_mgr_attr_group = { + .attrs = amdgpu_gtt_mgr_attributes +}; + +/** + * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space + * + * @res: the mem object to check + * + * Check if a mem object has already address space allocated. + */ +bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res) +{ + struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res); + + return drm_mm_node_allocated(&node->mm_nodes[0]); +} + +/** + * amdgpu_gtt_mgr_new - allocate a new node + * + * @man: TTM memory type manager + * @tbo: TTM BO we need this range for + * @place: placement flags and restrictions + * @res: the resulting mem object + * + * Dummy, allocate the node but no space for it yet. + */ +static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man, + struct ttm_buffer_object *tbo, + const struct ttm_place *place, + struct ttm_resource **res) +{ + struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); + uint32_t num_pages = PFN_UP(tbo->base.size); + struct ttm_range_mgr_node *node; + int r; + + node = kzalloc(struct_size(node, mm_nodes, 1), GFP_KERNEL); + if (!node) + return -ENOMEM; + + ttm_resource_init(tbo, place, &node->base); + if (!(place->flags & TTM_PL_FLAG_TEMPORARY) && + ttm_resource_manager_usage(man) > man->size) { + r = -ENOSPC; + goto err_free; + } + + if (place->lpfn) { + spin_lock(&mgr->lock); + r = drm_mm_insert_node_in_range(&mgr->mm, &node->mm_nodes[0], + num_pages, tbo->page_alignment, + 0, place->fpfn, place->lpfn, + DRM_MM_INSERT_BEST); + spin_unlock(&mgr->lock); + if (unlikely(r)) + goto err_free; + + node->base.start = node->mm_nodes[0].start; + } else { + node->mm_nodes[0].start = 0; + node->mm_nodes[0].size = PFN_UP(node->base.size); + node->base.start = AMDGPU_BO_INVALID_OFFSET; + } + + *res = &node->base; + return 0; + +err_free: + ttm_resource_fini(man, &node->base); + kfree(node); + return r; +} + +/** + * amdgpu_gtt_mgr_del - free ranges + * + * @man: TTM memory type manager + * @res: TTM memory object + * + * Free the allocated GTT again. + */ +static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man, + struct ttm_resource *res) +{ + struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res); + struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); + + spin_lock(&mgr->lock); + if (drm_mm_node_allocated(&node->mm_nodes[0])) + drm_mm_remove_node(&node->mm_nodes[0]); + spin_unlock(&mgr->lock); + + ttm_resource_fini(man, res); + kfree(node); +} + +/** + * amdgpu_gtt_mgr_recover - re-init gart + * + * @mgr: amdgpu_gtt_mgr pointer + * + * Re-init the gart for each known BO in the GTT. + */ +void amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr) +{ + struct ttm_range_mgr_node *node; + struct drm_mm_node *mm_node; + struct amdgpu_device *adev; + + adev = container_of(mgr, typeof(*adev), mman.gtt_mgr); + spin_lock(&mgr->lock); + drm_mm_for_each_node(mm_node, &mgr->mm) { + node = container_of(mm_node, typeof(*node), mm_nodes[0]); + amdgpu_ttm_recover_gart(node->base.bo); + } + spin_unlock(&mgr->lock); + + amdgpu_gart_invalidate_tlb(adev); +} + +/** + * amdgpu_gtt_mgr_intersects - test for intersection + * + * @man: Our manager object + * @res: The resource to test + * @place: The place for the new allocation + * @size: The size of the new allocation + * + * Simplified intersection test, only interesting if we need GART or not. + */ +static bool amdgpu_gtt_mgr_intersects(struct ttm_resource_manager *man, + struct ttm_resource *res, + const struct ttm_place *place, + size_t size) +{ + return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res); +} + +/** + * amdgpu_gtt_mgr_compatible - test for compatibility + * + * @man: Our manager object + * @res: The resource to test + * @place: The place for the new allocation + * @size: The size of the new allocation + * + * Simplified compatibility test. + */ +static bool amdgpu_gtt_mgr_compatible(struct ttm_resource_manager *man, + struct ttm_resource *res, + const struct ttm_place *place, + size_t size) +{ + return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res); +} + +/** + * amdgpu_gtt_mgr_debug - dump VRAM table + * + * @man: TTM memory type manager + * @printer: DRM printer to use + * + * Dump the table content using printk. + */ +static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man, + struct drm_printer *printer) +{ + struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); + + spin_lock(&mgr->lock); + drm_mm_print(&mgr->mm, printer); + spin_unlock(&mgr->lock); +} + +static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = { + .alloc = amdgpu_gtt_mgr_new, + .free = amdgpu_gtt_mgr_del, + .intersects = amdgpu_gtt_mgr_intersects, + .compatible = amdgpu_gtt_mgr_compatible, + .debug = amdgpu_gtt_mgr_debug +}; + +/** + * amdgpu_gtt_mgr_init - init GTT manager and DRM MM + * + * @adev: amdgpu_device pointer + * @gtt_size: maximum size of GTT + * + * Allocate and initialize the GTT manager. + */ +int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size) +{ + struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr; + struct ttm_resource_manager *man = &mgr->manager; + uint64_t start, size; + + man->use_tt = true; + man->func = &amdgpu_gtt_mgr_func; + + ttm_resource_manager_init(man, &adev->mman.bdev, gtt_size); + + start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS; + size = (adev->gmc.gart_size >> PAGE_SHIFT) - start; + drm_mm_init(&mgr->mm, start, size); + spin_lock_init(&mgr->lock); + + ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager); + ttm_resource_manager_set_used(man, true); + return 0; +} + +/** + * amdgpu_gtt_mgr_fini - free and destroy GTT manager + * + * @adev: amdgpu_device pointer + * + * Destroy and free the GTT manager, returns -EBUSY if ranges are still + * allocated inside it. + */ +void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev) +{ + struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr; + struct ttm_resource_manager *man = &mgr->manager; + int ret; + + ttm_resource_manager_set_used(man, false); + + ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); + if (ret) + return; + + spin_lock(&mgr->lock); + drm_mm_takedown(&mgr->mm); + spin_unlock(&mgr->lock); + + ttm_resource_manager_cleanup(man); + ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL); +} |