Subject: linux-next: manual merge of the amdgpu tree with the drm-misc tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 21 May 2021 11:38:27 +1000

Hi all,

Today's linux-next merge of the amdgpu tree got a conflict in:

  drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

between commit:

  35bba8313b95 ("drm/amdgpu: Convert driver sysfs attributes to static attributes")

from the drm-misc tree and commit:

  589939d40116 ("drm/amdgpu: fix coding style and documentation in amdgpu_vram_mgr.c")

from the amdgpu tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index a99d196b05df,a52e17ed3df6..000000000000
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@@ -162,74 -181,6 +181,10 @@@ static struct attribute *amdgpu_vram_mg
  	NULL
  };
  
 +const struct attribute_group amdgpu_vram_mgr_attr_group = {
 +	.attrs = amdgpu_vram_mgr_attributes
 +};
 +
- static const struct ttm_resource_manager_func amdgpu_vram_mgr_func;
- 
- /**
-  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
-  *
-  * @adev: amdgpu_device pointer
-  *
-  * Allocate and initialize the VRAM manager.
-  */
- int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
- {
- 	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
- 	struct ttm_resource_manager *man = &mgr->manager;
- 
- 	ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT);
- 
- 	man->func = &amdgpu_vram_mgr_func;
- 
- 	drm_mm_init(&mgr->mm, 0, man->size);
- 	spin_lock_init(&mgr->lock);
- 	INIT_LIST_HEAD(&mgr->reservations_pending);
- 	INIT_LIST_HEAD(&mgr->reserved_pages);
- 
- 	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
- 	ttm_resource_manager_set_used(man, true);
- 	return 0;
- }
- 
- /**
-  * amdgpu_vram_mgr_fini - free and destroy VRAM manager
-  *
-  * @adev: amdgpu_device pointer
-  *
-  * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
-  * allocated inside it.
-  */
- void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
- {
- 	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
- 	struct ttm_resource_manager *man = &mgr->manager;
- 	int ret;
- 	struct amdgpu_vram_reservation *rsv, *temp;
- 
- 	ttm_resource_manager_set_used(man, false);
- 
- 	ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
- 	if (ret)
- 		return;
- 
- 	spin_lock(&mgr->lock);
- 	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node)
- 		kfree(rsv);
- 
- 	list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) {
- 		drm_mm_remove_node(&rsv->mm_node);
- 		kfree(rsv);
- 	}
- 	drm_mm_takedown(&mgr->mm);
- 	spin_unlock(&mgr->lock);
- 
- 	ttm_resource_manager_cleanup(man);
- 	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
- }
- 
  /**
   * amdgpu_vram_mgr_vis_size - Calculate visible node size
   *
@@@ -444,10 -396,10 +400,10 @@@ static int amdgpu_vram_mgr_new(struct t
  		pages_per_node = HPAGE_PMD_NR;
  #else
  		/* default to 2MB */
- 		pages_per_node = (2UL << (20UL - PAGE_SHIFT));
+ 		pages_per_node = 2UL << (20UL - PAGE_SHIFT);
  #endif
- 		pages_per_node = max((uint32_t)pages_per_node,
- 				     tbo->page_alignment);
+ 		pages_per_node = max_t(uint32_t, pages_per_node,
 -				       mem->page_alignment);
++				       tbo->page_alignment);
  		num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
  	}
  
@@@ -465,38 -417,29 +421,29 @@@
  	mem->start = 0;
  	pages_left = mem->num_pages;
  
- 	spin_lock(&mgr->lock);
- 	for (i = 0; pages_left >= pages_per_node; ++i) {
- 		unsigned long pages = rounddown_pow_of_two(pages_left);
- 
- 		/* Limit maximum size to 2GB due to SG table limitations */
- 		pages = min(pages, (2UL << (30 - PAGE_SHIFT)));
- 
- 		r = drm_mm_insert_node_in_range(mm, &nodes[i], pages,
- 						pages_per_node, 0,
- 						place->fpfn, lpfn,
- 						mode);
- 		if (unlikely(r))
- 			break;
- 
- 		vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
- 		amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
- 		pages_left -= pages;
- 	}
+ 	/* Limit maximum size to 2GB due to SG table limitations */
+ 	pages = min(pages_left, 2UL << (30 - PAGE_SHIFT));
  
- 	for (; pages_left; ++i) {
- 		unsigned long pages = min(pages_left, pages_per_node);
+ 	i = 0;
+ 	spin_lock(&mgr->lock);
+ 	while (pages_left) {
 -		uint32_t alignment = mem->page_alignment;
 +		uint32_t alignment = tbo->page_alignment;
  
- 		if (pages == pages_per_node)
+ 		if (pages >= pages_per_node)
  			alignment = pages_per_node;
  
- 		r = drm_mm_insert_node_in_range(mm, &nodes[i],
- 						pages, alignment, 0,
- 						place->fpfn, lpfn,
- 						mode);
- 		if (unlikely(r))
+ 		r = drm_mm_insert_node_in_range(mm, &nodes[i], pages, alignment,
+ 						0, place->fpfn, lpfn, mode);
+ 		if (unlikely(r)) {
+ 			if (pages > pages_per_node) {
+ 				if (is_power_of_2(pages))
+ 					pages = pages / 2;
+ 				else
+ 					pages = rounddown_pow_of_two(pages);
+ 				continue;
+ 			}
  			goto error;
+ 		}
  
  		vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
  		amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
@@@ -724,3 -672,73 +676,65 @@@ static const struct ttm_resource_manage
  	.free	= amdgpu_vram_mgr_del,
  	.debug	= amdgpu_vram_mgr_debug
  };
+ 
+ /**
+  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
+  *
+  * @adev: amdgpu_device pointer
+  *
+  * Allocate and initialize the VRAM manager.
+  */
+ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
+ {
+ 	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
+ 	struct ttm_resource_manager *man = &mgr->manager;
 -	int ret;
+ 
+ 	ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT);
+ 
+ 	man->func = &amdgpu_vram_mgr_func;
+ 
+ 	drm_mm_init(&mgr->mm, 0, man->size);
+ 	spin_lock_init(&mgr->lock);
+ 	INIT_LIST_HEAD(&mgr->reservations_pending);
+ 	INIT_LIST_HEAD(&mgr->reserved_pages);
+ 
 -	/* Add the two VRAM-related sysfs files */
 -	ret = sysfs_create_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes);
 -	if (ret)
 -		DRM_ERROR("Failed to register sysfs\n");
 -
+ 	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
+ 	ttm_resource_manager_set_used(man, true);
+ 	return 0;
+ }
+ 
+ /**
+  * amdgpu_vram_mgr_fini - free and destroy VRAM manager
+  *
+  * @adev: amdgpu_device pointer
+  *
+  * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
+  * allocated inside it.
+  */
+ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
+ {
+ 	struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
+ 	struct ttm_resource_manager *man = &mgr->manager;
+ 	int ret;
+ 	struct amdgpu_vram_reservation *rsv, *temp;
+ 
+ 	ttm_resource_manager_set_used(man, false);
+ 
+ 	ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
+ 	if (ret)
+ 		return;
+ 
+ 	spin_lock(&mgr->lock);
+ 	list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node)
+ 		kfree(rsv);
+ 
+ 	list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) {
+ 		drm_mm_remove_node(&rsv->mm_node);
+ 		kfree(rsv);
+ 	}
+ 	drm_mm_takedown(&mgr->mm);
+ 	spin_unlock(&mgr->lock);
+ 
 -	sysfs_remove_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes);
 -
+ 	ttm_resource_manager_cleanup(man);
+ 	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
+ }