[PATCH 10/12] drm/amdgpu: remove GTT accounting
Christian König
ckoenig.leichtzumerken at gmail.com
Mon Aug 30 08:57:05 UTC 2021
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.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 50 +++++----------------
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 5 +--
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 2 -
3 files changed, 12 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index 1dae68caa974..7085494c6a9f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -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);
}
/**
@@ -80,7 +80,7 @@ static ssize_t amdgpu_mem_info_gtt_used_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", amdgpu_gtt_mgr_usage(man));
+ return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
}
static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
@@ -132,20 +132,17 @@ 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);
@@ -171,11 +168,6 @@ 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;
}
@@ -198,27 +190,10 @@ 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
- *
- * @man: TTM memory type manager
- *
- * Return how many bytes are used in the GTT domain
- */
-uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
-{
- struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
-
- return atomic64_read(&mgr->used) * PAGE_SIZE;
-}
-
/**
* amdgpu_gtt_mgr_recover - re-init gart
*
@@ -265,9 +240,6 @@ 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 = {
@@ -293,14 +265,12 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 20b049ad61c1..bd8e28e9ca7c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -671,7 +671,7 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
ui64 = amdgpu_vram_mgr_vis_usage(ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM));
return copy_to_user(out, &ui64, min(size, 8u)) ? -EFAULT : 0;
case AMDGPU_INFO_GTT_USAGE:
- ui64 = amdgpu_gtt_mgr_usage(ttm_manager_type(&adev->mman.bdev, TTM_PL_TT));
+ ui64 = ttm_resource_manager_usage(ttm_manager_type(&adev->mman.bdev, TTM_PL_TT));
return copy_to_user(out, &ui64, min(size, 8u)) ? -EFAULT : 0;
case AMDGPU_INFO_GDS_CONFIG: {
struct drm_amdgpu_info_gds gds_info;
@@ -730,8 +730,7 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
mem.gtt.total_heap_size *= PAGE_SIZE;
mem.gtt.usable_heap_size = mem.gtt.total_heap_size -
atomic64_read(&adev->gart_pin_size);
- mem.gtt.heap_usage =
- amdgpu_gtt_mgr_usage(gtt_man);
+ mem.gtt.heap_usage = ttm_resource_manager_usage(gtt_man);
mem.gtt.max_allocation = mem.gtt.usable_heap_size * 3 / 4;
return copy_to_user(out, &mem,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 3205fd520060..af0faf9b36f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -52,7 +52,6 @@ struct amdgpu_gtt_mgr {
struct ttm_resource_manager manager;
struct drm_mm mm;
spinlock_t lock;
- atomic64_t used;
};
struct amdgpu_preempt_mgr {
@@ -114,7 +113,6 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev);
void amdgpu_vram_mgr_fini(struct amdgpu_device *adev);
bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem);
-uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man);
int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man);
uint64_t amdgpu_preempt_mgr_usage(struct ttm_resource_manager *man);
--
2.25.1
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