- Switch to drm buddy allocator - Add resource 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@intel.com

v5: - fix merge conflict issue

v6: - fix warnings reported by kernel test robot lkp@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

v9(Christian): - merged the below patch - drm/amdgpu: move vram inline functions into a header - rename label name as fallback - move struct amdgpu_vram_mgr to amdgpu_vram_mgr.h - remove unnecessary flags from struct amdgpu_vram_reservation - rewrite block NULL check condition - change else style as per coding standard - rewrite the node max size - add a helper function to fetch the first entry from the list

v10(Christian): - rename amdgpu_get_node() function name as amdgpu_vram_mgr_first_block

v11: - if size is not aligned with min_page_size, enable is_contiguous flag, therefore, the size round up to the power of two and trimmed to the original size. v12: - rename the function names having prefix as amdgpu_vram_mgr_*() - modify the round_up() logic conforming to contiguous flag enablement or if size is not aligned to min_block_size - modify the trim logic - rename node as block wherever applicable

Signed-off-by: Arunpravin Paneer Selvam Arunpravin.PaneerSelvam@amd.com --- drivers/gpu/drm/Kconfig | 1 + .../gpu/drm/amd/amdgpu/amdgpu_res_cursor.h | 97 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 10 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 359 ++++++++++-------- 4 files changed, 291 insertions(+), 176 deletions(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index f1422bee3dcc..5133c3f028ab 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -280,6 +280,7 @@ 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..6546552e596c 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 fallback;

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_resource(res)->blocks; + + block = list_first_entry_or_null(head, + struct drm_buddy_block, + link); + if (!block) + goto fallback; + + while (start >= amdgpu_vram_mgr_block_size(block)) { + start -= amdgpu_vram_mgr_block_size(block); + + next = block->link.next; + if (next != head) + block = list_entry(next, struct drm_buddy_block, link); + } + + cur->start = amdgpu_vram_mgr_block_start(block) + start; + cur->size = min(amdgpu_vram_mgr_block_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 fallback; + }

- cur->start = (node->start << PAGE_SHIFT) + start; - cur->size = min((node->size << PAGE_SHIFT) - start, size); + return; + +fallback: + 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_vram_mgr_block_start(block); + cur->size = min(amdgpu_vram_mgr_block_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..6a70818039dd 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 "amdgpu_vram_mgr.h" #include "amdgpu.h"

#define AMDGPU_PL_GDS (TTM_PL_PRIV + 0) @@ -38,15 +39,6 @@

#define AMDGPU_POISON 0xd0bed0be

-struct amdgpu_vram_mgr { - struct ttm_resource_manager manager; - struct drm_mm mm; - spinlock_t lock; - struct list_head reservations_pending; - struct list_head reserved_pages; - atomic64_t vis_usage; -}; - struct amdgpu_gtt_mgr { struct ttm_resource_manager manager; struct drm_mm mm; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index 0a7611648573..49e4092f447f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -32,8 +32,10 @@ #include "atom.h"

struct amdgpu_vram_reservation { - struct list_head node; - struct drm_mm_node mm_node; + u64 start; + u64 size; + struct list_head allocated; + struct list_head blocks; };

static inline struct amdgpu_vram_mgr * @@ -186,18 +188,18 @@ const struct attribute_group amdgpu_vram_mgr_attr_group = { };

/** - * amdgpu_vram_mgr_vis_size - Calculate visible node size + * amdgpu_vram_mgr_vis_size - Calculate visible block size * * @adev: amdgpu_device pointer - * @node: MM node structure + * @block: DRM BUDDY block structure * - * Calculate how many bytes of the MM node are inside visible VRAM + * Calculate how many bytes of the DRM BUDDY block 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_vram_mgr_block_start(block); + u64 end = start + amdgpu_vram_mgr_block_size(block);

if (start >= adev->gmc.visible_vram_size) return 0; @@ -218,9 +220,9 @@ 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_resource *vres = to_amdgpu_vram_mgr_resource(res); + struct drm_buddy_block *block; + u64 usage = 0;

if (amdgpu_gmc_vram_full_visible(&adev->gmc)) return amdgpu_bo_size(bo); @@ -228,9 +230,8 @@ 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, &vres->blocks, link) + usage += amdgpu_vram_mgr_vis_size(adev, block);

return usage; } @@ -240,23 +241,30 @@ 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)) + list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) { + if (drm_buddy_alloc_blocks(mm, rsv->start, rsv->start + rsv->size, + rsv->size, mm->chunk_size, &rsv->allocated, + DRM_BUDDY_RANGE_ALLOCATION)) + continue; + + block = amdgpu_vram_mgr_first_block(&rsv->allocated); + if (!block) continue;

dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n", - rsv->mm_node.start, rsv->mm_node.size); + rsv->start, rsv->size);

- vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node); + 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->mm_node.size << PAGE_SHIFT; + man->usage += rsv->size; spin_unlock(&man->bdev->lru_lock); - list_move(&rsv->node, &mgr->reserved_pages); + list_move(&rsv->blocks, &mgr->reserved_pages); } }

@@ -278,14 +286,16 @@ int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr, if (!rsv) 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->allocated); + INIT_LIST_HEAD(&rsv->blocks);

- spin_lock(&mgr->lock); - list_add_tail(&rsv->node, &mgr->reservations_pending); + rsv->start = start; + rsv->size = size; + + mutex_lock(&mgr->lock); + list_add_tail(&rsv->blocks, &mgr->reservations_pending); amdgpu_vram_mgr_do_reserve(&mgr->manager); - spin_unlock(&mgr->lock); + mutex_unlock(&mgr->lock);

return 0; } @@ -307,19 +317,19 @@ 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))) { + list_for_each_entry(rsv, &mgr->reservations_pending, blocks) { + 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))) { + list_for_each_entry(rsv, &mgr->reserved_pages, blocks) { + if (rsv->start <= start && + (start < (rsv->start + rsv->size))) { ret = 0; goto out; } @@ -327,32 +337,10 @@ 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 * @@ -368,46 +356,44 @@ 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; + u64 vis_usage = 0, max_bytes, cur_size, min_block_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; - unsigned i; + struct amdgpu_vram_mgr_resource *vres; + u64 size, remaining_size, lpfn, fpfn; + struct drm_buddy *mm = &mgr->mm; + struct drm_buddy_block *block; + unsigned long pages_per_block; int r;

- lpfn = place->lpfn; + lpfn = place->lpfn << PAGE_SHIFT; if (!lpfn) - lpfn = man->size >> PAGE_SHIFT; + lpfn = man->size; + + fpfn = place->fpfn << PAGE_SHIFT;

max_bytes = adev->gmc.mc_vram_size; if (tbo->type != ttm_bo_type_kernel) max_bytes -= AMDGPU_VM_RESERVED_VRAM;

- mem_bytes = tbo->base.size; if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { - pages_per_node = ~0ul; - num_nodes = 1; + pages_per_block = ~0ul; } else { #ifdef CONFIG_TRANSPARENT_HUGEPAGE - pages_per_node = HPAGE_PMD_NR; + pages_per_block = HPAGE_PMD_NR; #else /* default to 2MB */ - pages_per_node = 2UL << (20UL - PAGE_SHIFT); + pages_per_block = 2UL << (20UL - PAGE_SHIFT); #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); + pages_per_block = max_t(uint32_t, pages_per_block, + tbo->page_alignment); }

- node = kvmalloc(struct_size(node, mm_nodes, num_nodes), - GFP_KERNEL | __GFP_ZERO); - if (!node) + vres = kzalloc(sizeof(*vres), GFP_KERNEL); + if (!vres) return -ENOMEM;

- ttm_resource_init(tbo, place, &node->base); + ttm_resource_init(tbo, place, &vres->base);

/* bail out quickly if there's likely not enough VRAM for this BO */ if (ttm_resource_manager_usage(man) > max_bytes) { @@ -415,66 +401,130 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, goto error_fini; }

- mode = DRM_MM_INSERT_BEST; + INIT_LIST_HEAD(&vres->blocks); + if (place->flags & TTM_PL_FLAG_TOPDOWN) - mode = DRM_MM_INSERT_HIGH; - - pages_left = node->base.num_pages; - - /* Limit maximum size to 2GB due to SG table limitations */ - 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; + vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION; + + if (fpfn || lpfn != man->size) + /* Allocate blocks in desired range */ + vres->flags |= DRM_BUDDY_RANGE_ALLOCATION; + + remaining_size = vres->base.num_pages << PAGE_SHIFT; + + mutex_lock(&mgr->lock); + while (remaining_size) { + if (tbo->page_alignment) + min_block_size = tbo->page_alignment << PAGE_SHIFT; + else + min_block_size = mgr->default_page_size; + + BUG_ON(min_block_size < mm->chunk_size); + + /* Limit maximum size to 2GiB due to SG table limitations */ + size = min(remaining_size, 2ULL << 30); + + if (size >= pages_per_block << PAGE_SHIFT) + min_block_size = pages_per_block << PAGE_SHIFT; + + cur_size = size; + + if (fpfn + size != place->lpfn << PAGE_SHIFT) { + /* + * Except for actual range allocation, modify the size and + * min_block_size conforming to continuous flag enablement + */ + if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { + size = roundup_pow_of_two(size); + min_block_size = size; + /* + * Modify the size value if size is not + * aligned with min_block_size + */ + } else if (!IS_ALIGNED(size, min_block_size)) { + size = round_up(size, min_block_size); } - goto error_free; }

- vis_usage += amdgpu_vram_mgr_vis_size(adev, &node->mm_nodes[i]); - amdgpu_vram_mgr_virt_start(&node->base, &node->mm_nodes[i]); - pages_left -= pages; - ++i; + r = drm_buddy_alloc_blocks(mm, fpfn, + lpfn, + size, + min_block_size, + &vres->blocks, + vres->flags); + if (unlikely(r)) + goto error_free_blocks; + + if (size > remaining_size) + remaining_size = 0; + else + remaining_size -= size; + } + mutex_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); + }

- if (pages > pages_left) - pages = pages_left; + 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); + } + + list_for_each_entry(block, &vres->blocks, link) + vis_usage += amdgpu_vram_mgr_vis_size(adev, block); + + block = amdgpu_vram_mgr_first_block(&vres->blocks); + if (!block) { + r = -EINVAL; + goto error_fini; } - spin_unlock(&mgr->lock);

- if (i == 1) - node->base.placement |= TTM_PL_FLAG_CONTIGUOUS; + vres->base.start = amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT; + + if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks)) + vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;

if (adev->gmc.xgmi.connected_to_cpu) - node->base.bus.caching = ttm_cached; + vres->base.bus.caching = ttm_cached; else - node->base.bus.caching = ttm_write_combined; + vres->base.bus.caching = ttm_write_combined;

atomic64_add(vis_usage, &mgr->vis_usage); - *res = &node->base; + *res = &vres->base; return 0;

-error_free: - while (i--) - drm_mm_remove_node(&node->mm_nodes[i]); - spin_unlock(&mgr->lock); +error_free_blocks: + drm_buddy_free_list(mm, &vres->blocks); + mutex_unlock(&mgr->lock); error_fini: - ttm_resource_fini(man, &node->base); - kvfree(node); + ttm_resource_fini(man, &vres->base); + kfree(vres);

return r; } @@ -490,27 +540,26 @@ 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_resource *vres = to_amdgpu_vram_mgr_resource(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, &vres->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, &vres->blocks); + mutex_unlock(&mgr->lock);

atomic64_sub(vis_usage, &mgr->vis_usage);

ttm_resource_fini(man, res); - kvfree(node); + kfree(vres); }

/** @@ -542,7 +591,7 @@ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, if (!*sgt) return -ENOMEM;

- /* Determine the number of DRM_MM nodes to export */ + /* Determine the number of DRM_BUDDY blocks to export */ amdgpu_res_first(res, offset, length, &cursor); while (cursor.remaining) { num_entries++; @@ -558,10 +607,10 @@ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, sg->length = 0;

/* - * Walk down DRM_MM nodes to populate scatterlist nodes - * @note: Use iterator api to get first the DRM_MM node + * Walk down DRM_BUDDY blocks to populate scatterlist nodes + * @note: Use iterator api to get first the DRM_BUDDY block * and the number of bytes from it. Access the following - * DRM_MM node(s) if more buffer needs to exported + * DRM_BUDDY block(s) if more buffer needs to exported */ amdgpu_res_first(res, offset, length, &cursor); for_each_sgtable_sg((*sgt), sg, i) { @@ -648,13 +697,22 @@ 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 +732,21 @@ 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 +774,16 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev) if (ret) return;

- spin_lock(&mgr->lock); - list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) + mutex_lock(&mgr->lock); + list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks) kfree(rsv);

- list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) { - drm_mm_remove_node(&rsv->mm_node); + list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, blocks) { + drm_buddy_free_list(&mgr->mm, &rsv->blocks); 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);

base-commit: bc38e5d45dd513fa384bbedab3c0749f2e46771b