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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
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 | 300 |
1 files changed, 300 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 000000000..da7b1b92d --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c @@ -0,0 +1,300 @@ +/* + * 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/drmP.h> +#include "amdgpu.h" + +struct amdgpu_gtt_mgr { + struct drm_mm mm; + spinlock_t lock; + atomic64_t available; +}; + +struct amdgpu_gtt_node { + struct drm_mm_node node; + struct ttm_buffer_object *tbo; +}; + +/** + * amdgpu_gtt_mgr_init - init GTT manager and DRM MM + * + * @man: TTM memory type manager + * @p_size: maximum size of GTT + * + * Allocate and initialize the GTT manager. + */ +static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man, + unsigned long p_size) +{ + struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); + struct amdgpu_gtt_mgr *mgr; + uint64_t start, size; + + mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); + if (!mgr) + return -ENOMEM; + + 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); + atomic64_set(&mgr->available, p_size); + man->priv = mgr; + return 0; +} + +/** + * amdgpu_gtt_mgr_fini - free and destroy GTT manager + * + * @man: TTM memory type manager + * + * Destroy and free the GTT manager, returns -EBUSY if ranges are still + * allocated inside it. + */ +static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + spin_lock(&mgr->lock); + drm_mm_takedown(&mgr->mm); + spin_unlock(&mgr->lock); + kfree(mgr); + man->priv = NULL; + return 0; +} + +/** + * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space + * + * @mem: the mem object to check + * + * Check if a mem object has already address space allocated. + */ +bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_mem_reg *mem) +{ + struct amdgpu_gtt_node *node = mem->mm_node; + + return (node->node.start != AMDGPU_BO_INVALID_OFFSET); +} + +/** + * amdgpu_gtt_mgr_alloc - allocate new ranges + * + * @man: TTM memory type manager + * @tbo: TTM BO we need this range for + * @place: placement flags and restrictions + * @mem: the resulting mem object + * + * Allocate the address space for a node. + */ +static int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man, + struct ttm_buffer_object *tbo, + const struct ttm_place *place, + struct ttm_mem_reg *mem) +{ + struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev); + struct amdgpu_gtt_mgr *mgr = man->priv; + struct amdgpu_gtt_node *node = mem->mm_node; + enum drm_mm_insert_mode mode; + unsigned long fpfn, lpfn; + int r; + + if (amdgpu_gtt_mgr_has_gart_addr(mem)) + return 0; + + if (place) + fpfn = place->fpfn; + else + fpfn = 0; + + if (place && place->lpfn) + lpfn = place->lpfn; + else + lpfn = adev->gart.num_cpu_pages; + + mode = DRM_MM_INSERT_BEST; + if (place && place->flags & TTM_PL_FLAG_TOPDOWN) + mode = DRM_MM_INSERT_HIGH; + + spin_lock(&mgr->lock); + r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages, + mem->page_alignment, 0, fpfn, lpfn, + mode); + spin_unlock(&mgr->lock); + + if (!r) + mem->start = node->node.start; + + return r; +} + +/** + * 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 + * @mem: the resulting mem object + * + * Dummy, allocate the node but no space for it yet. + */ +static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man, + struct ttm_buffer_object *tbo, + const struct ttm_place *place, + struct ttm_mem_reg *mem) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + struct amdgpu_gtt_node *node; + int r; + + spin_lock(&mgr->lock); + if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) && + atomic64_read(&mgr->available) < mem->num_pages) { + spin_unlock(&mgr->lock); + return 0; + } + atomic64_sub(mem->num_pages, &mgr->available); + spin_unlock(&mgr->lock); + + node = kzalloc(sizeof(*node), GFP_KERNEL); + if (!node) { + r = -ENOMEM; + goto err_out; + } + + node->node.start = AMDGPU_BO_INVALID_OFFSET; + node->node.size = mem->num_pages; + node->tbo = tbo; + mem->mm_node = node; + + if (place->fpfn || place->lpfn || place->flags & TTM_PL_FLAG_TOPDOWN) { + r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem); + if (unlikely(r)) { + kfree(node); + mem->mm_node = NULL; + r = 0; + goto err_out; + } + } else { + mem->start = node->node.start; + } + + return 0; +err_out: + atomic64_add(mem->num_pages, &mgr->available); + + return r; +} + +/** + * amdgpu_gtt_mgr_del - free ranges + * + * @man: TTM memory type manager + * @tbo: TTM BO we need this range for + * @place: placement flags and restrictions + * @mem: TTM memory object + * + * Free the allocated GTT again. + */ +static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man, + struct ttm_mem_reg *mem) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + struct amdgpu_gtt_node *node = mem->mm_node; + + if (!node) + return; + + spin_lock(&mgr->lock); + if (node->node.start != AMDGPU_BO_INVALID_OFFSET) + drm_mm_remove_node(&node->node); + spin_unlock(&mgr->lock); + atomic64_add(mem->num_pages, &mgr->available); + + kfree(node); + mem->mm_node = NULL; +} + +/** + * amdgpu_gtt_mgr_usage - return usage of GTT domain + * + * @man: TTM memory type manager + * + * Return how many bytes are used in the GTT domain + */ +uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager *man) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + s64 result = man->size - atomic64_read(&mgr->available); + + return (result > 0 ? result : 0) * PAGE_SIZE; +} + +int amdgpu_gtt_mgr_recover(struct ttm_mem_type_manager *man) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + struct amdgpu_gtt_node *node; + struct drm_mm_node *mm_node; + int r = 0; + + spin_lock(&mgr->lock); + drm_mm_for_each_node(mm_node, &mgr->mm) { + node = container_of(mm_node, struct amdgpu_gtt_node, node); + r = amdgpu_ttm_recover_gart(node->tbo); + if (r) + break; + } + spin_unlock(&mgr->lock); + + return r; +} + +/** + * 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_mem_type_manager *man, + struct drm_printer *printer) +{ + struct amdgpu_gtt_mgr *mgr = man->priv; + + spin_lock(&mgr->lock); + drm_mm_print(&mgr->mm, printer); + spin_unlock(&mgr->lock); + + drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n", + man->size, (u64)atomic64_read(&mgr->available), + amdgpu_gtt_mgr_usage(man) >> 20); +} + +const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = { + .init = amdgpu_gtt_mgr_init, + .takedown = amdgpu_gtt_mgr_fini, + .get_node = amdgpu_gtt_mgr_new, + .put_node = amdgpu_gtt_mgr_del, + .debug = amdgpu_gtt_mgr_debug +}; |