[Intel-gfx] [PATCH v12] drm/amdgpu: add drm buddy support to amdgpu
Arunpravin Paneer Selvam
Arunpravin.PaneerSelvam at amd.com
Thu Apr 7 05:46:51 UTC 2022
- 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 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
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 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 | 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
--
2.25.1
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