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drm/amdgpu: remove GTT 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/20220214093439.2989-6-christian.koenig@amd.com
This commit is contained in:
Christian König
2021-07-12 15:18:05 +02:00
parent 73792e6e66
commit dfa714b88e
4 changed files with 16 additions and 45 deletions
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49
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
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@@ -60,7 +60,7 @@ static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
struct ttm_resource_manager *man;
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
return sysfs_emit(buf, "%llu\n", man->size * PAGE_SIZE);
return sysfs_emit(buf, "%llu\n", man->size);
}
/**
@@ -77,8 +77,9 @@ static ssize_t amdgpu_mem_info_gtt_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.gtt_mgr.manager;
return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(&adev->mman.gtt_mgr));
return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
}
static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
@@ -130,20 +131,17 @@ static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
struct amdgpu_gtt_node *node;
int r;
if (!(place->flags & TTM_PL_FLAG_TEMPORARY) &&
atomic64_add_return(num_pages, &mgr->used) > man->size) {
atomic64_sub(num_pages, &mgr->used);
return -ENOSPC;
}
node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL);
if (!node) {
r = -ENOMEM;
goto err_out;
}
if (!node)
return -ENOMEM;
node->tbo = tbo;
ttm_resource_init(tbo, place, &node->base.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);
@@ -169,11 +167,6 @@ static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
err_free:
ttm_resource_fini(man, &node->base.base);
kfree(node);
err_out:
if (!(place->flags & TTM_PL_FLAG_TEMPORARY))
atomic64_sub(num_pages, &mgr->used);
return r;
}
@@ -196,25 +189,10 @@ static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
drm_mm_remove_node(&node->base.mm_nodes[0]);
spin_unlock(&mgr->lock);
if (!(res->placement & TTM_PL_FLAG_TEMPORARY))
atomic64_sub(res->num_pages, &mgr->used);
ttm_resource_fini(man, res);
kfree(node);
}
/**
* amdgpu_gtt_mgr_usage - return usage of GTT domain
*
* @mgr: amdgpu_gtt_mgr pointer
*
* Return how many bytes are used in the GTT domain
*/
uint64_t amdgpu_gtt_mgr_usage(struct amdgpu_gtt_mgr *mgr)
{
return atomic64_read(&mgr->used) * PAGE_SIZE;
}
/**
* amdgpu_gtt_mgr_recover - re-init gart
*
@@ -260,9 +238,6 @@ static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
spin_lock(&mgr->lock);
drm_mm_print(&mgr->mm, printer);
spin_unlock(&mgr->lock);
drm_printf(printer, "man size:%llu pages, gtt used:%llu pages\n",
man->size, atomic64_read(&mgr->used));
}
static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
@@ -288,14 +263,12 @@ int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
man->use_tt = true;
man->func = &amdgpu_gtt_mgr_func;
ttm_resource_manager_init(man, &adev->mman.bdev,
gtt_size >> PAGE_SHIFT);
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);
atomic64_set(&mgr->used, 0);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
ttm_resource_manager_set_used(man, true);