drm-tip amdgpu not compiling, possible fix attached

[Hans de Goede <hdegoede@redhat.com>]

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Hi All,

I've been rebasing my backlight refactor on top of drm-tip to submit
a new version upstream and I noticed that drm-tip does not compile.

This is caused by a mismerge of:

commit 925b6e59138cefa47275c67891c65d48d3266d57 (drm-misc/for-linux-next-fixes, drm-misc/drm-misc-fixes, drm-misc-fixes)Selvam <Arunpravin.PaneerSelvam@amd.com>
Date:   Fri Jul 8 02:30:47 2022 -0700
    Revert "drm/amdgpu: add drm buddy support to amdgpu"
    
    This reverts commit c9cad937c0c58618fe5b0310fd539a854dc1ae95.
    
    This is part of a revert of the following commits:
    commit 708d19d9f362 ("drm/amdgpu: move internal vram_mgr function into the C file")
    commit 5e3f1e7729ec ("drm/amdgpu: fix start calculation in amdgpu_vram_mgr_new")
    commit c9cad937c0c5 ("drm/amdgpu: add drm buddy support to amdgpu")
    
    [WHY]
    Few users reported garbaged graphics as soon as x starts,
    reverting until this can be resolved.
    
    Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>

From drm-misc/for-linux-next-fixes / drm-misc-fixes

The attached patch on top of drm-tip fixes the mismerge. Note compile-tested
only!

If someone with more rerere experience then me can use this to fix things that
would be great.

Regards,

Hans

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From 49aacb8d7b29c8d448ce469e66ddb33f8a19e552 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 10 Jul 2022 21:27:41 +0200
Subject: [PATCH] fix amdpgu mismerge

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 84 +-------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h | 62 ---------------
 2 files changed, 2 insertions(+), 144 deletions(-)
 delete mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 254954aa983c..0a7611648573 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -48,35 +48,6 @@ to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
 	return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
 }
 
-static inline struct drm_buddy_block *
-amdgpu_vram_mgr_first_block(struct list_head *list)
-{
-	return list_first_entry_or_null(list, struct drm_buddy_block, link);
-}
-
-static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head)
-{
-	struct drm_buddy_block *block;
-	u64 start, size;
-
-	block = amdgpu_vram_mgr_first_block(head);
-	if (!block)
-		return false;
-
-	while (head != block->link.next) {
-		start = amdgpu_vram_mgr_block_start(block);
-		size = amdgpu_vram_mgr_block_size(block);
-
-		block = list_entry(block->link.next, struct drm_buddy_block, link);
-		if (start + size != amdgpu_vram_mgr_block_start(block))
-			return false;
-	}
-
-	return true;
-}
-
-
-
 /**
  * DOC: mem_info_vram_total
  *
@@ -485,59 +456,8 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 	}
 	spin_unlock(&mgr->lock);
 
-	if (cur_size != size) {
-		struct drm_buddy_block *block;
-		struct list_head *trim_list;
-		u64 original_size;
-		LIST_HEAD(temp);
-
-		trim_list = &vres->blocks;
-		original_size = vres->base.num_pages << PAGE_SHIFT;
-
-		/*
-		 * If size value is rounded up to min_block_size, trim the last
-		 * block to the required size
-		 */
-		if (!list_is_singular(&vres->blocks)) {
-			block = list_last_entry(&vres->blocks, typeof(*block), link);
-			list_move_tail(&block->link, &temp);
-			trim_list = &temp;
-			/*
-			 * Compute the original_size value by subtracting the
-			 * last block size with (aligned size - original size)
-			 */
-			original_size = amdgpu_vram_mgr_block_size(block) - (size - cur_size);
-		}
-
-		mutex_lock(&mgr->lock);
-		drm_buddy_block_trim(mm,
-				     original_size,
-				     trim_list);
-		mutex_unlock(&mgr->lock);
-
-		if (!list_empty(&temp))
-			list_splice_tail(trim_list, &vres->blocks);
-	}
-
-	vres->base.start = 0;
-	list_for_each_entry(block, &vres->blocks, link) {
-		unsigned long start;
-
-		start = amdgpu_vram_mgr_block_start(block) +
-			amdgpu_vram_mgr_block_size(block);
-		start >>= PAGE_SHIFT;
-
-		if (start > vres->base.num_pages)
-			start -= vres->base.num_pages;
-		else
-			start = 0;
-		vres->base.start = max(vres->base.start, start);
-
-		vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
-	}
-
-	if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
-		vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
+	if (i == 1)
+		node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
 
 	if (adev->gmc.xgmi.connected_to_cpu)
 		node->base.bus.caching = ttm_cached;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h
deleted file mode 100644
index 4b267bf1c5db..000000000000
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/* SPDX-License-Identifier: MIT
- * Copyright 2021 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.
- *
- */
-
-#ifndef __AMDGPU_VRAM_MGR_H__
-#define __AMDGPU_VRAM_MGR_H__
-
-#include <drm/drm_buddy.h>
-
-struct amdgpu_vram_mgr {
-	struct ttm_resource_manager manager;
-	struct drm_buddy mm;
-	/* protects access to buffer objects */
-	struct mutex lock;
-	struct list_head reservations_pending;
-	struct list_head reserved_pages;
-	atomic64_t vis_usage;
-	u64 default_page_size;
-};
-
-struct amdgpu_vram_mgr_resource {
-	struct ttm_resource base;
-	struct list_head blocks;
-	unsigned long flags;
-};
-
-static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block)
-{
-	return drm_buddy_block_offset(block);
-}
-
-static inline u64 amdgpu_vram_mgr_block_size(struct drm_buddy_block *block)
-{
-	return PAGE_SIZE << drm_buddy_block_order(block);
-}
-
-static inline struct amdgpu_vram_mgr_resource *
-to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
-{
-	return container_of(res, struct amdgpu_vram_mgr_resource, base);
-}
-
-#endif
-- 
2.36.0