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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
parentInitial commit. (diff)
downloadlinux-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.c300
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
+};