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drm/amdgpu: remove VRAM accounting v2

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This is provided by TTM now.

Also switch man->size to bytes instead of pages and fix the double
printing of size and usage in debugfs.

v2: fix size checking as well

Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220214093439.2989-8-christian.koenig@amd.com
This commit is contained in:
Christian König
2021-07-12 15:37:01 +02:00
parent 3fc2b087df
commit 7db47b8388
7 changed files with 32 additions and 46 deletions
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58
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
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@@ -96,9 +96,9 @@ static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
{
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",
amdgpu_vram_mgr_usage(&adev->mman.vram_mgr));
return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
}
/**
@@ -253,7 +253,9 @@ static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node);
atomic64_add(vis_usage, &mgr->vis_usage);
atomic64_add(rsv->mm_node.size << PAGE_SHIFT, &mgr->usage);
spin_lock(&man->bdev->lru_lock);
man->usage += rsv->mm_node.size << PAGE_SHIFT;
spin_unlock(&man->bdev->lru_lock);
list_move(&rsv->node, &mgr->reserved_pages);
}
}
@@ -378,19 +380,13 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
lpfn = place->lpfn;
if (!lpfn)
lpfn = man->size;
lpfn = man->size >> PAGE_SHIFT;
max_bytes = adev->gmc.mc_vram_size;
if (tbo->type != ttm_bo_type_kernel)
max_bytes -= AMDGPU_VM_RESERVED_VRAM;
/* bail out quickly if there's likely not enough VRAM for this BO */
mem_bytes = tbo->base.size;
if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
r = -ENOSPC;
goto error_sub;
}
if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
pages_per_node = ~0ul;
num_nodes = 1;
@@ -408,13 +404,17 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
node = kvmalloc(struct_size(node, mm_nodes, num_nodes),
GFP_KERNEL | __GFP_ZERO);
if (!node) {
r = -ENOMEM;
goto error_sub;
}
if (!node)
return -ENOMEM;
ttm_resource_init(tbo, place, &node->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;
}
mode = DRM_MM_INSERT_BEST;
if (place->flags & TTM_PL_FLAG_TOPDOWN)
mode = DRM_MM_INSERT_HIGH;
@@ -472,11 +472,10 @@ error_free:
while (i--)
drm_mm_remove_node(&node->mm_nodes[i]);
spin_unlock(&mgr->lock);
error_fini:
ttm_resource_fini(man, &node->base);
kvfree(node);
error_sub:
atomic64_sub(mem_bytes, &mgr->usage);
return r;
}
@@ -494,7 +493,7 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
uint64_t usage = 0, vis_usage = 0;
uint64_t vis_usage = 0;
unsigned i, pages;
spin_lock(&mgr->lock);
@@ -503,13 +502,11 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
struct drm_mm_node *mm = &node->mm_nodes[i];
drm_mm_remove_node(mm);
usage += mm->size << PAGE_SHIFT;
vis_usage += amdgpu_vram_mgr_vis_size(adev, mm);
}
amdgpu_vram_mgr_do_reserve(man);
spin_unlock(&mgr->lock);
atomic64_sub(usage, &mgr->usage);
atomic64_sub(vis_usage, &mgr->vis_usage);
ttm_resource_fini(man, res);
@@ -627,18 +624,6 @@ void amdgpu_vram_mgr_free_sgt(struct device *dev,
kfree(sgt);
}
/**
* amdgpu_vram_mgr_usage - how many bytes are used in this domain
*
* @mgr: amdgpu_vram_mgr pointer
*
* Returns how many bytes are used in this domain.
*/
uint64_t amdgpu_vram_mgr_usage(struct amdgpu_vram_mgr *mgr)
{
return atomic64_read(&mgr->usage);
}
/**
* amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
*
@@ -664,13 +649,12 @@ static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
drm_printf(printer, " vis usage:%llu\n",
amdgpu_vram_mgr_vis_usage(mgr));
spin_lock(&mgr->lock);
drm_mm_print(&mgr->mm, printer);
spin_unlock(&mgr->lock);
drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
man->size, amdgpu_vram_mgr_usage(mgr) >> 20,
amdgpu_vram_mgr_vis_usage(mgr) >> 20);
}
static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
@@ -692,11 +676,11 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
struct ttm_resource_manager *man = &mgr->manager;
ttm_resource_manager_init(man, &adev->mman.bdev,
adev->gmc.real_vram_size >> PAGE_SHIFT);
adev->gmc.real_vram_size);
man->func = &amdgpu_vram_mgr_func;
drm_mm_init(&mgr->mm, 0, man->size);
drm_mm_init(&mgr->mm, 0, man->size >> PAGE_SHIFT);
spin_lock_init(&mgr->lock);
INIT_LIST_HEAD(&mgr->reservations_pending);
INIT_LIST_HEAD(&mgr->reserved_pages);