[Intel-gfx] [PATCH v13 5/5] drm/amdgpu: add drm buddy support to amdgpu
Christian König
ckoenig.leichtzumerken at gmail.com
Tue Feb 22 12:54:33 UTC 2022
Am 21.02.22 um 17:45 schrieb Arunpravin:
> - Remove drm_mm references and replace with drm buddy functionalities
> - Add res cursor support for drm buddy
>
> v2(Matthew Auld):
> - replace spinlock with mutex as we call kmem_cache_zalloc
> (..., GFP_KERNEL) in drm_buddy_alloc() function
>
> - lock drm_buddy_block_trim() function as it calls
> mark_free/mark_split are all globally visible
>
> v3(Matthew Auld):
> - remove trim method error handling as we address the failure case
> at drm_buddy_block_trim() function
>
> v4:
> - fix warnings reported by kernel test robot <lkp at intel.com>
>
> v5:
> - fix merge conflict issue
>
> v6:
> - fix warnings reported by kernel test robot <lkp at intel.com>
>
> v7:
> - remove DRM_BUDDY_RANGE_ALLOCATION flag usage
>
> v8:
> - keep DRM_BUDDY_RANGE_ALLOCATION flag usage
> - resolve conflicts created by drm/amdgpu: remove VRAM accounting v2
>
> Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam at amd.com>
> ---
> drivers/gpu/drm/Kconfig | 1 +
> .../gpu/drm/amd/amdgpu/amdgpu_res_cursor.h | 97 +++++--
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 7 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 256 ++++++++++--------
> 4 files changed, 229 insertions(+), 132 deletions(-)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 763355330b17..019ec0440ced 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -279,6 +279,7 @@ config DRM_AMDGPU
> select HWMON
> select BACKLIGHT_CLASS_DEVICE
> select INTERVAL_TREE
> + select DRM_BUDDY
> help
> Choose this option if you have a recent AMD Radeon graphics card.
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
> index acfa207cf970..da12b4ff2e45 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
> @@ -30,12 +30,15 @@
> #include <drm/ttm/ttm_resource.h>
> #include <drm/ttm/ttm_range_manager.h>
>
> +#include "amdgpu_vram_mgr.h"
> +
> /* state back for walking over vram_mgr and gtt_mgr allocations */
> struct amdgpu_res_cursor {
> uint64_t start;
> uint64_t size;
> uint64_t remaining;
> - struct drm_mm_node *node;
> + void *node;
> + uint32_t mem_type;
> };
>
> /**
> @@ -52,27 +55,63 @@ static inline void amdgpu_res_first(struct ttm_resource *res,
> uint64_t start, uint64_t size,
> struct amdgpu_res_cursor *cur)
> {
> + struct drm_buddy_block *block;
> + struct list_head *head, *next;
> struct drm_mm_node *node;
>
> - if (!res || res->mem_type == TTM_PL_SYSTEM) {
> - cur->start = start;
> - cur->size = size;
> - cur->remaining = size;
> - cur->node = NULL;
> - WARN_ON(res && start + size > res->num_pages << PAGE_SHIFT);
> - return;
> - }
> + if (!res)
> + goto err_out;
It's not really an error to not have a resource. So I would rather name
the label fallback or something like that.
>
> BUG_ON(start + size > res->num_pages << PAGE_SHIFT);
>
> - node = to_ttm_range_mgr_node(res)->mm_nodes;
> - while (start >= node->size << PAGE_SHIFT)
> - start -= node++->size << PAGE_SHIFT;
> + cur->mem_type = res->mem_type;
> +
> + switch (cur->mem_type) {
> + case TTM_PL_VRAM:
> + head = &to_amdgpu_vram_mgr_node(res)->blocks;
> +
> + block = list_first_entry_or_null(head,
> + struct drm_buddy_block,
> + link);
> + if (!block)
> + goto err_out;
> +
> + while (start >= amdgpu_node_size(block)) {
> + start -= amdgpu_node_size(block);
> +
> + next = block->link.next;
> + if (next != head)
> + block = list_entry(next, struct drm_buddy_block, link);
> + }
> +
> + cur->start = amdgpu_node_start(block) + start;
> + cur->size = min(amdgpu_node_size(block) - start, size);
> + cur->remaining = size;
> + cur->node = block;
> + break;
> + case TTM_PL_TT:
> + node = to_ttm_range_mgr_node(res)->mm_nodes;
> + while (start >= node->size << PAGE_SHIFT)
> + start -= node++->size << PAGE_SHIFT;
> +
> + cur->start = (node->start << PAGE_SHIFT) + start;
> + cur->size = min((node->size << PAGE_SHIFT) - start, size);
> + cur->remaining = size;
> + cur->node = node;
> + break;
> + default:
> + goto err_out;
> + }
>
> - cur->start = (node->start << PAGE_SHIFT) + start;
> - cur->size = min((node->size << PAGE_SHIFT) - start, size);
> + return;
> +
> +err_out:
> + cur->start = start;
> + cur->size = size;
> cur->remaining = size;
> - cur->node = node;
> + cur->node = NULL;
> + WARN_ON(res && start + size > res->num_pages << PAGE_SHIFT);
> + return;
> }
>
> /**
> @@ -85,7 +124,9 @@ static inline void amdgpu_res_first(struct ttm_resource *res,
> */
> static inline void amdgpu_res_next(struct amdgpu_res_cursor *cur, uint64_t size)
> {
> - struct drm_mm_node *node = cur->node;
> + struct drm_buddy_block *block;
> + struct drm_mm_node *node;
> + struct list_head *next;
>
> BUG_ON(size > cur->remaining);
>
> @@ -99,9 +140,27 @@ static inline void amdgpu_res_next(struct amdgpu_res_cursor *cur, uint64_t size)
> return;
> }
>
> - cur->node = ++node;
> - cur->start = node->start << PAGE_SHIFT;
> - cur->size = min(node->size << PAGE_SHIFT, cur->remaining);
> + switch (cur->mem_type) {
> + case TTM_PL_VRAM:
> + block = cur->node;
> +
> + next = block->link.next;
> + block = list_entry(next, struct drm_buddy_block, link);
> +
> + cur->node = block;
> + cur->start = amdgpu_node_start(block);
> + cur->size = min(amdgpu_node_size(block), cur->remaining);
> + break;
> + case TTM_PL_TT:
> + node = cur->node;
> +
> + cur->node = ++node;
> + cur->start = node->start << PAGE_SHIFT;
> + cur->size = min(node->size << PAGE_SHIFT, cur->remaining);
> + break;
> + default:
> + return;
> + }
> }
>
> #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index 9120ae80ef52..8acdb2fb3a23 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -26,6 +26,7 @@
>
> #include <linux/dma-direction.h>
> #include <drm/gpu_scheduler.h>
> +#include <drm/drm_buddy.h>
> #include "amdgpu.h"
>
> #define AMDGPU_PL_GDS (TTM_PL_PRIV + 0)
> @@ -40,11 +41,13 @@
>
> struct amdgpu_vram_mgr {
> struct ttm_resource_manager manager;
> - struct drm_mm mm;
> - spinlock_t lock;
> + 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;
> };
Can we move that to amdgpu_vram_mgr.h as well?
>
> struct amdgpu_gtt_mgr {
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> index 0a7611648573..6b2a5879e985 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> @@ -32,8 +32,11 @@
> #include "atom.h"
>
> struct amdgpu_vram_reservation {
> + u64 start;
> + u64 size;
> + unsigned long flags;
Looks like we will always use the same flags and that can be dropped.
> + struct list_head block;
> struct list_head node;
> - struct drm_mm_node mm_node;
> };
>
> static inline struct amdgpu_vram_mgr *
> @@ -194,10 +197,10 @@ const struct attribute_group amdgpu_vram_mgr_attr_group = {
> * Calculate how many bytes of the MM node are inside visible VRAM
> */
> static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
> - struct drm_mm_node *node)
> + struct drm_buddy_block *block)
> {
> - uint64_t start = node->start << PAGE_SHIFT;
> - uint64_t end = (node->size + node->start) << PAGE_SHIFT;
> + u64 start = amdgpu_node_start(block);
> + u64 end = start + amdgpu_node_size(block);
>
> if (start >= adev->gmc.visible_vram_size)
> return 0;
> @@ -218,9 +221,9 @@ u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
> {
> struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> struct ttm_resource *res = bo->tbo.resource;
> - unsigned pages = res->num_pages;
> - struct drm_mm_node *mm;
> - u64 usage;
> + struct amdgpu_vram_mgr_node *node = to_amdgpu_vram_mgr_node(res);
> + struct drm_buddy_block *block;
> + u64 usage = 0;
>
> if (amdgpu_gmc_vram_full_visible(&adev->gmc))
> return amdgpu_bo_size(bo);
> @@ -228,9 +231,8 @@ u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
> if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
> return 0;
>
> - mm = &container_of(res, struct ttm_range_mgr_node, base)->mm_nodes[0];
> - for (usage = 0; pages; pages -= mm->size, mm++)
> - usage += amdgpu_vram_mgr_vis_size(adev, mm);
> + list_for_each_entry(block, &node->blocks, link)
> + usage += amdgpu_vram_mgr_vis_size(adev, block);
>
> return usage;
> }
> @@ -240,23 +242,31 @@ static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
> {
> struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
> struct amdgpu_device *adev = to_amdgpu_device(mgr);
> - struct drm_mm *mm = &mgr->mm;
> + struct drm_buddy *mm = &mgr->mm;
> struct amdgpu_vram_reservation *rsv, *temp;
> + struct drm_buddy_block *block;
> uint64_t vis_usage;
>
> list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) {
> - if (drm_mm_reserve_node(mm, &rsv->mm_node))
> + if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size,
> + rsv->size, mm->chunk_size, &rsv->block,
> + rsv->flags))
> continue;
>
> - dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
> - rsv->mm_node.start, rsv->mm_node.size);
> -
> - vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node);
> - atomic64_add(vis_usage, &mgr->vis_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);
> + block = list_first_entry_or_null(&rsv->block,
> + struct drm_buddy_block,
> + link);
> + if (block) {
Rather make that an "if (!block) continue;".
> + dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
> + rsv->start, rsv->size);
> +
> + vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
> + atomic64_add(vis_usage, &mgr->vis_usage);
> + spin_lock(&man->bdev->lru_lock);
> + man->usage += rsv->size;
> + spin_unlock(&man->bdev->lru_lock);
> + list_move(&rsv->node, &mgr->reserved_pages);
> + }
> }
> }
>
> @@ -279,13 +289,16 @@ int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
> return -ENOMEM;
>
> INIT_LIST_HEAD(&rsv->node);
> - rsv->mm_node.start = start >> PAGE_SHIFT;
> - rsv->mm_node.size = size >> PAGE_SHIFT;
> + INIT_LIST_HEAD(&rsv->block);
> +
> + rsv->start = start;
> + rsv->size = size;
> + rsv->flags |= DRM_BUDDY_RANGE_ALLOCATION;
>
> - spin_lock(&mgr->lock);
> + mutex_lock(&mgr->lock);
> list_add_tail(&rsv->node, &mgr->reservations_pending);
> amdgpu_vram_mgr_do_reserve(&mgr->manager);
> - spin_unlock(&mgr->lock);
> + mutex_unlock(&mgr->lock);
>
> return 0;
> }
> @@ -307,19 +320,19 @@ int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
> struct amdgpu_vram_reservation *rsv;
> int ret;
>
> - spin_lock(&mgr->lock);
> + mutex_lock(&mgr->lock);
>
> list_for_each_entry(rsv, &mgr->reservations_pending, node) {
> - if ((rsv->mm_node.start <= start) &&
> - (start < (rsv->mm_node.start + rsv->mm_node.size))) {
> + if (rsv->start <= start &&
> + (start < (rsv->start + rsv->size))) {
> ret = -EBUSY;
> goto out;
> }
> }
>
> list_for_each_entry(rsv, &mgr->reserved_pages, node) {
> - if ((rsv->mm_node.start <= start) &&
> - (start < (rsv->mm_node.start + rsv->mm_node.size))) {
> + if (rsv->start <= start &&
> + (start < (rsv->start + rsv->size))) {
> ret = 0;
> goto out;
> }
> @@ -327,32 +340,10 @@ int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
>
> ret = -ENOENT;
> out:
> - spin_unlock(&mgr->lock);
> + mutex_unlock(&mgr->lock);
> return ret;
> }
>
> -/**
> - * amdgpu_vram_mgr_virt_start - update virtual start address
> - *
> - * @mem: ttm_resource to update
> - * @node: just allocated node
> - *
> - * Calculate a virtual BO start address to easily check if everything is CPU
> - * accessible.
> - */
> -static void amdgpu_vram_mgr_virt_start(struct ttm_resource *mem,
> - struct drm_mm_node *node)
> -{
> - unsigned long start;
> -
> - start = node->start + node->size;
> - if (start > mem->num_pages)
> - start -= mem->num_pages;
> - else
> - start = 0;
> - mem->start = max(mem->start, start);
> -}
> -
> /**
> * amdgpu_vram_mgr_new - allocate new ranges
> *
> @@ -368,13 +359,13 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> const struct ttm_place *place,
> struct ttm_resource **res)
> {
> - unsigned long lpfn, num_nodes, pages_per_node, pages_left, pages;
> + unsigned long lpfn, pages_per_node, pages_left, pages, n_pages;
> + u64 vis_usage = 0, mem_bytes, max_bytes, min_page_size;
> struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
> struct amdgpu_device *adev = to_amdgpu_device(mgr);
> - uint64_t vis_usage = 0, mem_bytes, max_bytes;
> - struct ttm_range_mgr_node *node;
> - struct drm_mm *mm = &mgr->mm;
> - enum drm_mm_insert_mode mode;
> + struct amdgpu_vram_mgr_node *node;
> + struct drm_buddy *mm = &mgr->mm;
> + struct drm_buddy_block *block;
> unsigned i;
> int r;
>
> @@ -387,10 +378,9 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> max_bytes -= AMDGPU_VM_RESERVED_VRAM;
>
> mem_bytes = tbo->base.size;
> - if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
> + if (place->flags & TTM_PL_FLAG_CONTIGUOUS)
> pages_per_node = ~0ul;
> - num_nodes = 1;
> - } else {
> + else {
Please keep the } else { here, see coding style rules.
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> pages_per_node = HPAGE_PMD_NR;
> #else
> @@ -399,11 +389,9 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> #endif
> pages_per_node = max_t(uint32_t, pages_per_node,
> tbo->page_alignment);
> - num_nodes = DIV_ROUND_UP_ULL(PFN_UP(mem_bytes), pages_per_node);
> }
>
> - node = kvmalloc(struct_size(node, mm_nodes, num_nodes),
> - GFP_KERNEL | __GFP_ZERO);
> + node = kzalloc(sizeof(*node), GFP_KERNEL);
> if (!node)
> return -ENOMEM;
>
> @@ -415,9 +403,17 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> goto error_fini;
> }
>
> - mode = DRM_MM_INSERT_BEST;
> + INIT_LIST_HEAD(&node->blocks);
> +
> if (place->flags & TTM_PL_FLAG_TOPDOWN)
> - mode = DRM_MM_INSERT_HIGH;
> + node->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
> +
> + if (place->fpfn || lpfn != man->size >> PAGE_SHIFT)
> + /* Allocate blocks in desired range */
> + node->flags |= DRM_BUDDY_RANGE_ALLOCATION;
> +
> + min_page_size = mgr->default_page_size;
> + BUG_ON(min_page_size < mm->chunk_size);
>
> pages_left = node->base.num_pages;
>
> @@ -425,36 +421,61 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> pages = min(pages_left, 2UL << (30 - PAGE_SHIFT));
>
> i = 0;
> - spin_lock(&mgr->lock);
> while (pages_left) {
> - uint32_t alignment = tbo->page_alignment;
> -
> if (pages >= pages_per_node)
> - alignment = pages_per_node;
> -
> - r = drm_mm_insert_node_in_range(mm, &node->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_free;
> + pages = pages_per_node;
When I see that correctly then this is a rather bad idea.
That would limit each allocated block to only 2MiB, but we really want
allocations up to 1GiB!
> +
> + n_pages = pages;
> +
> + if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
> + n_pages = roundup_pow_of_two(n_pages);
> + min_page_size = (u64)n_pages << PAGE_SHIFT;
> +
> + if (n_pages > lpfn)
> + lpfn = n_pages;
> }
>
> - vis_usage += amdgpu_vram_mgr_vis_size(adev, &node->mm_nodes[i]);
> - amdgpu_vram_mgr_virt_start(&node->base, &node->mm_nodes[i]);
> + mutex_lock(&mgr->lock);
> + r = drm_buddy_alloc_blocks(mm, (u64)place->fpfn << PAGE_SHIFT,
> + (u64)lpfn << PAGE_SHIFT,
> + (u64)n_pages << PAGE_SHIFT,
> + min_page_size,
> + &node->blocks,
> + node->flags);
> + mutex_unlock(&mgr->lock);
> + if (unlikely(r))
> + goto error_free_blocks;
> +
> pages_left -= pages;
> ++i;
>
> if (pages > pages_left)
> pages = pages_left;
> }
> - spin_unlock(&mgr->lock);
> +
> + /* Free unused pages for contiguous allocation */
> + if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
> + u64 actual_size = (u64)node->base.num_pages << PAGE_SHIFT;
> +
> + mutex_lock(&mgr->lock);
> + drm_buddy_block_trim(mm,
> + actual_size,
> + &node->blocks);
> + mutex_unlock(&mgr->lock);
> + }
> +
> + list_for_each_entry(block, &node->blocks, link)
> + vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
> +
> + block = list_first_entry_or_null(&node->blocks,
> + struct drm_buddy_block,
> + link);
This is a repeating patter, you should probably add a helper function
for it.
Regards,
Christian.
> + if (!block) {
> + r = -EINVAL;
> + goto error_fini;
> + }
> +
> + node->base.start = amdgpu_node_start(block) >> PAGE_SHIFT;
>
> if (i == 1)
> node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
> @@ -468,13 +489,13 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> *res = &node->base;
> return 0;
>
> -error_free:
> - while (i--)
> - drm_mm_remove_node(&node->mm_nodes[i]);
> - spin_unlock(&mgr->lock);
> +error_free_blocks:
> + mutex_lock(&mgr->lock);
> + drm_buddy_free_list(mm, &node->blocks);
> + mutex_unlock(&mgr->lock);
> error_fini:
> ttm_resource_fini(man, &node->base);
> - kvfree(node);
> + kfree(node);
>
> return r;
> }
> @@ -490,27 +511,26 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
> static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
> struct ttm_resource *res)
> {
> - struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
> + struct amdgpu_vram_mgr_node *node = to_amdgpu_vram_mgr_node(res);
> struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
> struct amdgpu_device *adev = to_amdgpu_device(mgr);
> + struct drm_buddy *mm = &mgr->mm;
> + struct drm_buddy_block *block;
> uint64_t vis_usage = 0;
> - unsigned i, pages;
>
> - spin_lock(&mgr->lock);
> - for (i = 0, pages = res->num_pages; pages;
> - pages -= node->mm_nodes[i].size, ++i) {
> - struct drm_mm_node *mm = &node->mm_nodes[i];
> + mutex_lock(&mgr->lock);
> + list_for_each_entry(block, &node->blocks, link)
> + vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
>
> - drm_mm_remove_node(mm);
> - vis_usage += amdgpu_vram_mgr_vis_size(adev, mm);
> - }
> amdgpu_vram_mgr_do_reserve(man);
> - spin_unlock(&mgr->lock);
> +
> + drm_buddy_free_list(mm, &node->blocks);
> + mutex_unlock(&mgr->lock);
>
> atomic64_sub(vis_usage, &mgr->vis_usage);
>
> ttm_resource_fini(man, res);
> - kvfree(node);
> + kfree(node);
> }
>
> /**
> @@ -648,13 +668,22 @@ static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
> struct drm_printer *printer)
> {
> struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
> + struct drm_buddy *mm = &mgr->mm;
> + struct drm_buddy_block *block;
>
> 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);
> + mutex_lock(&mgr->lock);
> + drm_printf(printer, "default_page_size: %lluKiB\n",
> + mgr->default_page_size >> 10);
> +
> + drm_buddy_print(mm, printer);
> +
> + drm_printf(printer, "reserved:\n");
> + list_for_each_entry(block, &mgr->reserved_pages, link)
> + drm_buddy_block_print(mm, block, printer);
> + mutex_unlock(&mgr->lock);
> }
>
> static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
> @@ -674,16 +703,21 @@ 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 err;
>
> ttm_resource_manager_init(man, &adev->mman.bdev,
> adev->gmc.real_vram_size);
>
> man->func = &amdgpu_vram_mgr_func;
>
> - drm_mm_init(&mgr->mm, 0, man->size >> PAGE_SHIFT);
> - spin_lock_init(&mgr->lock);
> + err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
> + if (err)
> + return err;
> +
> + mutex_init(&mgr->lock);
> INIT_LIST_HEAD(&mgr->reservations_pending);
> INIT_LIST_HEAD(&mgr->reserved_pages);
> + mgr->default_page_size = PAGE_SIZE;
>
> ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
> ttm_resource_manager_set_used(man, true);
> @@ -711,16 +745,16 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
> if (ret)
> return;
>
> - spin_lock(&mgr->lock);
> + mutex_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);
> + drm_buddy_free_list(&mgr->mm, &rsv->block);
> kfree(rsv);
> }
> - drm_mm_takedown(&mgr->mm);
> - spin_unlock(&mgr->lock);
> + drm_buddy_fini(&mgr->mm);
> + mutex_unlock(&mgr->lock);
>
> ttm_resource_manager_cleanup(man);
> ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
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