- 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@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): - 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

Signed-off-by: Arunpravin 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 | 249 ++++++++++-------- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h | 68 +++++ 5 files changed, 289 insertions(+), 136 deletions(-) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h

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..864c609ba00b 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_node(res)->blocks; + + block = list_first_entry_or_null(head, + struct drm_buddy_block, + link); + if (!block) + goto fallback; + + 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 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_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..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..cdf66802e6bc 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 { + u64 start; + u64 size; + struct list_head block; struct list_head node; - struct drm_mm_node mm_node; };

static inline struct amdgpu_vram_mgr * @@ -194,10 +196,10 @@ 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 +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_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 +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, &node->blocks, link) + usage += amdgpu_vram_mgr_vis_size(adev, block);

return usage; } @@ -240,21 +241,28 @@ 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, + DRM_BUDDY_RANGE_ALLOCATION)) + continue; + + block = amdgpu_get_node(&rsv->block); + 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); } @@ -279,13 +287,15 @@ 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;

- 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 +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))) { + 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 +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 * @@ -368,13 +356,13 @@ 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; + 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;

@@ -389,7 +377,6 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man, mem_bytes = tbo->base.size; if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { pages_per_node = ~0ul; - num_nodes = 1; } else { #ifdef CONFIG_TRANSPARENT_HUGEPAGE pages_per_node = HPAGE_PMD_NR; @@ -399,11 +386,9 @@ 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;

@@ -415,48 +400,83 @@ 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;

- pages_left = node->base.num_pages; + if (place->fpfn || lpfn != man->size >> PAGE_SHIFT) + /* Allocate blocks in desired range */ + node->flags |= DRM_BUDDY_RANGE_ALLOCATION;

- /* Limit maximum size to 2GB due to SG table limitations */ - pages = min(pages_left, 2UL << (30 - PAGE_SHIFT)); + BUG_ON(!node->base.num_pages); + pages_left = node->base.num_pages;

i = 0; - spin_lock(&mgr->lock); while (pages_left) { - uint32_t alignment = tbo->page_alignment; + if (tbo->page_alignment) + min_page_size = tbo->page_alignment << PAGE_SHIFT; + else + min_page_size = mgr->default_page_size; + + /* Limit maximum size to 2GB due to SG table limitations */ + pages = min(pages_left, 2UL << (30 - PAGE_SHIFT));

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; + min_page_size = pages_per_node << PAGE_SHIFT; + + if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { + pages = roundup_pow_of_two(pages); + min_page_size = pages << PAGE_SHIFT; + + if (pages > lpfn) + lpfn = pages; }

- 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; + BUG_ON(min_page_size < mm->chunk_size); + + mutex_lock(&mgr->lock); + r = drm_buddy_alloc_blocks(mm, (u64)place->fpfn << PAGE_SHIFT, + (u64)lpfn << PAGE_SHIFT, + (u64)pages << PAGE_SHIFT, + min_page_size, + &node->blocks, + node->flags); + mutex_unlock(&mgr->lock); + if (unlikely(r)) + goto error_free_blocks; + ++i;

if (pages > pages_left) - pages = pages_left; + pages_left = 0; + else + pages_left -= pages; } - spin_unlock(&mgr->lock);

- if (i == 1) + /* 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 = amdgpu_get_node(&node->blocks); + if (!block) { + r = -EINVAL; + goto error_fini; + } + + node->base.start = amdgpu_node_start(block) >> PAGE_SHIFT; + + if (i == 1 && place->flags & TTM_PL_FLAG_CONTIGUOUS) node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;

if (adev->gmc.xgmi.connected_to_cpu) @@ -468,13 +488,13 @@ 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 +510,26 @@ 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 +667,22 @@ 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 +702,21 @@ 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 +744,16 @@ 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); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h new file mode 100644 index 000000000000..e7d6bbf40c33 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h @@ -0,0 +1,68 @@ +/* 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_node { + struct ttm_resource base; + struct list_head blocks; + unsigned long flags; +}; + +static inline u64 amdgpu_node_start(struct drm_buddy_block *block) +{ + return drm_buddy_block_offset(block); +} + +static inline u64 amdgpu_node_size(struct drm_buddy_block *block) +{ + return PAGE_SIZE << drm_buddy_block_order(block); +} + +static inline struct drm_buddy_block * +amdgpu_get_node(struct list_head *list) +{ + return list_first_entry_or_null(list, struct drm_buddy_block, link); +} + +static inline struct amdgpu_vram_mgr_node * +to_amdgpu_vram_mgr_node(struct ttm_resource *res) +{ + return container_of(res, struct amdgpu_vram_mgr_node, base); +} + +#endif