#include "atom.h"
struct amdgpu_vram_reservation {
- u64 start;
- u64 size;
- struct list_head allocated;
- struct list_head blocks;
+ struct list_head node;
+ struct drm_mm_node mm_node;
};
static inline struct amdgpu_vram_mgr *
};
/**
- * amdgpu_vram_mgr_vis_size - Calculate visible block size
+ * amdgpu_vram_mgr_vis_size - Calculate visible node size
*
* @adev: amdgpu_device pointer
- * @block: DRM BUDDY block structure
+ * @node: MM node structure
*
- * Calculate how many bytes of the DRM BUDDY block are inside visible VRAM
+ * 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_buddy_block *block)
+ struct drm_mm_node *node)
{
- u64 start = amdgpu_vram_mgr_block_start(block);
- u64 end = start + amdgpu_vram_mgr_block_size(block);
+ uint64_t start = node->start << PAGE_SHIFT;
+ uint64_t end = (node->size + node->start) << PAGE_SHIFT;
if (start >= adev->gmc.visible_vram_size)
return 0;
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_resource *res = bo->tbo.resource;
- struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
- struct drm_buddy_block *block;
- u64 usage = 0;
+ unsigned pages = res->num_pages;
+ struct drm_mm_node *mm;
+ u64 usage;
if (amdgpu_gmc_vram_full_visible(&adev->gmc))
return amdgpu_bo_size(bo);
if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
return 0;
- list_for_each_entry(block, &vres->blocks, link)
- usage += amdgpu_vram_mgr_vis_size(adev, block);
+ 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);
return usage;
}
{
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_mm *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, 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)
+ list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) {
+ if (drm_mm_reserve_node(mm, &rsv->mm_node))
continue;
dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
- rsv->start, rsv->size);
+ rsv->mm_node.start, rsv->mm_node.size);
- vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
+ 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->size;
+ man->usage += rsv->mm_node.size << PAGE_SHIFT;
spin_unlock(&man->bdev->lru_lock);
- list_move(&rsv->blocks, &mgr->reserved_pages);
+ list_move(&rsv->node, &mgr->reserved_pages);
}
}
if (!rsv)
return -ENOMEM;
- INIT_LIST_HEAD(&rsv->allocated);
- INIT_LIST_HEAD(&rsv->blocks);
+ INIT_LIST_HEAD(&rsv->node);
+ rsv->mm_node.start = start >> PAGE_SHIFT;
+ rsv->mm_node.size = size >> PAGE_SHIFT;
- rsv->start = start;
- rsv->size = size;
-
- mutex_lock(&mgr->lock);
- list_add_tail(&rsv->blocks, &mgr->reservations_pending);
+ spin_lock(&mgr->lock);
+ list_add_tail(&rsv->node, &mgr->reservations_pending);
amdgpu_vram_mgr_do_reserve(&mgr->manager);
- mutex_unlock(&mgr->lock);
+ spin_unlock(&mgr->lock);
return 0;
}
struct amdgpu_vram_reservation *rsv;
int ret;
- mutex_lock(&mgr->lock);
+ spin_lock(&mgr->lock);
- list_for_each_entry(rsv, &mgr->reservations_pending, blocks) {
- if (rsv->start <= start &&
- (start < (rsv->start + rsv->size))) {
+ list_for_each_entry(rsv, &mgr->reservations_pending, node) {
+ if ((rsv->mm_node.start <= start) &&
+ (start < (rsv->mm_node.start + rsv->mm_node.size))) {
ret = -EBUSY;
goto out;
}
}
- list_for_each_entry(rsv, &mgr->reserved_pages, blocks) {
- if (rsv->start <= start &&
- (start < (rsv->start + rsv->size))) {
+ list_for_each_entry(rsv, &mgr->reserved_pages, node) {
+ if ((rsv->mm_node.start <= start) &&
+ (start < (rsv->mm_node.start + rsv->mm_node.size))) {
ret = 0;
goto out;
}
ret = -ENOENT;
out:
- mutex_unlock(&mgr->lock);
+ spin_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
*
* @man: TTM memory type manager
const struct ttm_place *place,
struct ttm_resource **res)
{
- u64 vis_usage = 0, max_bytes, cur_size, min_block_size;
+ unsigned long lpfn, num_nodes, pages_per_node, pages_left, pages;
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
- 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;
+ 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;
int r;
- lpfn = place->lpfn << PAGE_SHIFT;
+ lpfn = place->lpfn;
if (!lpfn)
- lpfn = man->size;
-
- fpfn = place->fpfn << PAGE_SHIFT;
+ lpfn = man->size >> 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_block = ~0ul;
+ pages_per_node = ~0ul;
+ num_nodes = 1;
} else {
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- pages_per_block = HPAGE_PMD_NR;
+ pages_per_node = HPAGE_PMD_NR;
#else
/* default to 2MB */
- pages_per_block = 2UL << (20UL - PAGE_SHIFT);
+ pages_per_node = 2UL << (20UL - PAGE_SHIFT);
#endif
- pages_per_block = max_t(uint32_t, pages_per_block,
- tbo->page_alignment);
+ 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);
}
- vres = kzalloc(sizeof(*vres), GFP_KERNEL);
- if (!vres)
+ node = kvmalloc(struct_size(node, mm_nodes, num_nodes),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!node)
return -ENOMEM;
- ttm_resource_init(tbo, place, &vres->base);
+ ttm_resource_init(tbo, place, &node->base);
/* bail out quickly if there's likely not enough VRAM for this BO */
if (ttm_resource_manager_usage(man) > max_bytes) {
goto error_fini;
}
- INIT_LIST_HEAD(&vres->blocks);
-
+ mode = DRM_MM_INSERT_BEST;
if (place->flags & TTM_PL_FLAG_TOPDOWN)
- 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);
+ 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;
}
+ goto error_free;
}
- 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);
- }
+ 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;
- 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;
+ if (pages > pages_left)
+ pages = pages_left;
}
+ spin_unlock(&mgr->lock);
- 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 (i == 1)
+ node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
if (adev->gmc.xgmi.connected_to_cpu)
- vres->base.bus.caching = ttm_cached;
+ node->base.bus.caching = ttm_cached;
else
- vres->base.bus.caching = ttm_write_combined;
+ node->base.bus.caching = ttm_write_combined;
atomic64_add(vis_usage, &mgr->vis_usage);
- *res = &vres->base;
+ *res = &node->base;
return 0;
-error_free_blocks:
- drm_buddy_free_list(mm, &vres->blocks);
- mutex_unlock(&mgr->lock);
+error_free:
+ while (i--)
+ drm_mm_remove_node(&node->mm_nodes[i]);
+ spin_unlock(&mgr->lock);
error_fini:
- ttm_resource_fini(man, &vres->base);
- kfree(vres);
+ ttm_resource_fini(man, &node->base);
+ kvfree(node);
return r;
}
static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
- struct amdgpu_vram_mgr_resource *vres = to_amdgpu_vram_mgr_resource(res);
+ struct ttm_range_mgr_node *node = to_ttm_range_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;
- mutex_lock(&mgr->lock);
- list_for_each_entry(block, &vres->blocks, link)
- vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
+ 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];
+ drm_mm_remove_node(mm);
+ vis_usage += amdgpu_vram_mgr_vis_size(adev, mm);
+ }
amdgpu_vram_mgr_do_reserve(man);
-
- drm_buddy_free_list(mm, &vres->blocks);
- mutex_unlock(&mgr->lock);
+ spin_unlock(&mgr->lock);
atomic64_sub(vis_usage, &mgr->vis_usage);
ttm_resource_fini(man, res);
- kfree(vres);
+ kvfree(node);
}
/**
if (!*sgt)
return -ENOMEM;
- /* Determine the number of DRM_BUDDY blocks to export */
+ /* Determine the number of DRM_MM nodes to export */
amdgpu_res_first(res, offset, length, &cursor);
while (cursor.remaining) {
num_entries++;
sg->length = 0;
/*
- * Walk down DRM_BUDDY blocks to populate scatterlist nodes
- * @note: Use iterator api to get first the DRM_BUDDY block
+ * Walk down DRM_MM nodes to populate scatterlist nodes
+ * @note: Use iterator api to get first the DRM_MM node
* and the number of bytes from it. Access the following
- * DRM_BUDDY block(s) if more buffer needs to exported
+ * DRM_MM node(s) if more buffer needs to exported
*/
amdgpu_res_first(res, offset, length, &cursor);
for_each_sgtable_sg((*sgt), sg, i) {
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));
- 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);
+ spin_lock(&mgr->lock);
+ drm_mm_print(&mgr->mm, printer);
+ spin_unlock(&mgr->lock);
}
static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
{
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;
- err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
- if (err)
- return err;
-
- mutex_init(&mgr->lock);
+ drm_mm_init(&mgr->mm, 0, man->size >> PAGE_SHIFT);
+ spin_lock_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);
if (ret)
return;
- mutex_lock(&mgr->lock);
- list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, blocks)
+ spin_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, blocks) {
- drm_buddy_free_list(&mgr->mm, &rsv->blocks);
+ list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) {
+ drm_mm_remove_node(&rsv->mm_node);
kfree(rsv);
}
- drm_buddy_fini(&mgr->mm);
- mutex_unlock(&mgr->lock);
+ drm_mm_takedown(&mgr->mm);
+ spin_unlock(&mgr->lock);
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
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