/*
* Copyright 2016 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.
*
* Authors: Christian König
*/
#include <linux/dma-mapping.h>
#include <drm/ttm/ttm_range_manager.h>
#include "amdgpu.h"
#include "amdgpu_vm.h"
#include "amdgpu_res_cursor.h"
#include "amdgpu_atomfirmware.h"
#include "atom.h"
#define AMDGPU_MAX_SG_SEGMENT_SIZE (2UL << 30)
struct amdgpu_vram_reservation {
u64 start;
u64 size;
struct list_head allocated;
struct list_head blocks;
};
static inline struct amdgpu_vram_mgr *
to_vram_mgr(struct ttm_resource_manager *man)
{
return container_of(man, struct amdgpu_vram_mgr, manager);
}
static inline struct amdgpu_device *
to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
{
return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
}
static inline struct drm_buddy_block *
amdgpu_vram_mgr_first_block(struct list_head *list)
{
return list_first_entry_or_null(list, struct drm_buddy_block, link);
}
static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head)
{
struct drm_buddy_block *block;
u64 start, size;
block = amdgpu_vram_mgr_first_block(head);
if (!block)
return false;
while (head != block->link.next) {
start = amdgpu_vram_mgr_block_start(block);
size = amdgpu_vram_mgr_block_size(block);
block = list_entry(block->link.next, struct drm_buddy_block, link);
if (start + size != amdgpu_vram_mgr_block_start(block))
return false;
}
return true;
}
static inline u64 amdgpu_vram_mgr_blocks_size(struct list_head *head)
{
struct drm_buddy_block *block;
u64 size = 0;
list_for_each_entry(block, head, link)
size += amdgpu_vram_mgr_block_size(block);
return size;
}
/**
* DOC: mem_info_vram_total
*
* The amdgpu driver provides a sysfs API for reporting current total VRAM
* available on the device
* The file mem_info_vram_total is used for this and returns the total
* amount of VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
}
/**
* DOC: mem_info_vis_vram_total
*
* The amdgpu driver provides a sysfs API for reporting current total
* visible VRAM available on the device
* The file mem_info_vis_vram_total is used for this and returns the total
* amount of visible VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
}
/**
* DOC: mem_info_vram_used
*
* The amdgpu driver provides a sysfs API for reporting current total VRAM
* available on the device
* The file mem_info_vram_used is used for this and returns the total
* amount of currently used VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man = &adev->mman.vram_mgr.manager;
return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
}
/**
* DOC: mem_info_vis_vram_used
*
* The amdgpu driver provides a sysfs API for reporting current total of
* used visible VRAM
* The file mem_info_vis_vram_used is used for this and returns the total
* amount of currently used visible VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
return sysfs_emit(buf, "%llu\n",
amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr));
}
/**
* DOC: mem_info_vram_vendor
*
* The amdgpu driver provides a sysfs API for reporting the vendor of the
* installed VRAM
* The file mem_info_vram_vendor is used for this and returns the name of the
* vendor.
*/
static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
switch (adev->gmc.vram_vendor) {
case SAMSUNG:
return sysfs_emit(buf, "samsung\n");
case INFINEON:
return sysfs_emit(buf, "infineon\n");
case ELPIDA:
return sysfs_emit(buf, "elpida\n");
case ETRON:
return sysfs_emit(buf, "etron\n");
case NANYA:
return sysfs_emit(buf, "nanya\n");
case HYNIX:
return sysfs_emit(buf, "hynix\n");
case MOSEL:
return sysfs_emit(buf, "mosel\n");
case WINBOND:
return sysfs_emit(buf, "winbond\n");
case ESMT:
return sysfs_emit(buf, "esmt\n");
case MICRON:
return sysfs_emit(buf, "micron\n");
default:
return sysfs_emit(buf, "unknown\n");
}
}
static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
amdgpu_mem_info_vram_total_show, NULL);
static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
amdgpu_mem_info_vis_vram_total_show,NULL);
static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
amdgpu_mem_info_vram_used_show, NULL);
static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
amdgpu_mem_info_vis_vram_used_show, NULL);
static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
amdgpu_mem_info_vram_vendor, NULL);
static struct attribute *amdgpu_vram_mgr_attributes[] = {
&dev_attr_mem_info_vram_total.attr,
&dev_attr_mem_info_vis_vram_total.attr,
&dev_attr_mem_info_vram_used.attr,
&dev_attr_mem_info_vis_vram_used.attr,
&dev_attr_mem_info_vram_vendor.attr,
NULL
};
static umode_t amdgpu_vram_attrs_is_visible(struct kobject *kobj,
struct attribute *attr, int i)
{
struct device *dev = kobj_to_dev(kobj);
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
if (attr == &dev_attr_mem_info_vram_vendor.attr &&
!adev->gmc.vram_vendor)
return 0;
return attr->mode;
}
const struct attribute_group amdgpu_vram_mgr_attr_group = {
.attrs = amdgpu_vram_mgr_attributes,
.is_visible = amdgpu_vram_attrs_is_visible
};
/**
* amdgpu_vram_mgr_vis_size - Calculate visible block size
*
* @adev: amdgpu_device pointer
* @block: DRM BUDDY block structure
*
* 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_buddy_block *block)
{
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;
return (end > adev->gmc.visible_vram_size ?
adev->gmc.visible_vram_size : end) - start;
}
/**
* amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
*
* @bo: &amdgpu_bo buffer object (must be in VRAM)
*
* Returns:
* How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
*/
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;
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);
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);
return usage;
}
/* Commit the reservation of VRAM pages */
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_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, 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->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->blocks, &mgr->reserved_pages);
}
}
/**
* amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
*
* @mgr: amdgpu_vram_mgr pointer
* @start: start address of the range in VRAM
* @size: size of the range
*
* Reserve memory from start address with the specified size in VRAM
*/
int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
uint64_t start, uint64_t size)
{
struct amdgpu_vram_reservation *rsv;
rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
if (!rsv)
return -ENOMEM;
INIT_LIST_HEAD(&rsv->allocated);
INIT_LIST_HEAD(&rsv->blocks);
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);
mutex_unlock(&mgr->lock);
return 0;
}
/**
* amdgpu_vram_mgr_query_page_status - query the reservation status
*
* @mgr: amdgpu_vram_mgr pointer
* @start: start address of a page in VRAM
*
* Returns:
* -EBUSY: the page is still hold and in pending list
* 0: the page has been reserved
* -ENOENT: the input page is not a reservation
*/
int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
uint64_t start)
{
struct amdgpu_vram_reservation *rsv;
int ret;
mutex_lock(&mgr->lock);
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, blocks) {
if (rsv->start <= start &&
(start < (rsv->start + rsv->size))) {
ret = 0;
goto out;
}
}
ret = -ENOENT;
out:
mutex_unlock(&mgr->lock);
return ret;
}
static void amdgpu_dummy_vram_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
DRM_DEBUG_DRIVER("Dummy vram mgr debug\n");
}
static bool amdgpu_dummy_vram_mgr_compatible(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
DRM_DEBUG_DRIVER("Dummy vram mgr compatible\n");
return false;
}
static bool amdgpu_dummy_vram_mgr_intersects(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
DRM_DEBUG_DRIVER("Dummy vram mgr intersects\n");
return true;
}
static void amdgpu_dummy_vram_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
DRM_DEBUG_DRIVER("Dummy vram mgr deleted\n");
}
static int amdgpu_dummy_vram_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
DRM_DEBUG_DRIVER("Dummy vram mgr new\n");
return -ENOSPC;
}
/**
* amdgpu_vram_mgr_new - allocate new ranges
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @res: the resulting mem object
*
* Allocate VRAM for the given BO.
*/
static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
u64 vis_usage = 0, max_bytes, min_block_size;
struct amdgpu_vram_mgr_resource *vres;
u64 size, remaining_size, lpfn, fpfn;
unsigned int adjust_dcc_size = 0;
struct drm_buddy *mm = &mgr->mm;
struct drm_buddy_block *block;
unsigned long pages_per_block;
int r;
lpfn = (u64)place->lpfn << PAGE_SHIFT;
if (!lpfn)
lpfn = man->size;
fpfn = (u64)place->fpfn << PAGE_SHIFT;
max_bytes = adev->gmc.mc_vram_size;
if (tbo->type != ttm_bo_type_kernel)
max_bytes -= AMDGPU_VM_RESERVED_VRAM;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) {
pages_per_block = ~0ul;
} else {
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
pages_per_block = HPAGE_PMD_NR;
#else
/* default to 2MB */
pages_per_block = 2UL << (20UL - PAGE_SHIFT);
#endif
pages_per_block = max_t(u32, pages_per_block,
tbo->page_alignment);
}
vres = kzalloc(sizeof(*vres), GFP_KERNEL);
if (!vres)
return -ENOMEM;
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) {
r = -ENOSPC;
goto error_fini;
}
INIT_LIST_HEAD(&vres->blocks);
if (place->flags & TTM_PL_FLAG_TOPDOWN)
vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
vres->flags |= DRM_BUDDY_CONTIGUOUS_ALLOCATION;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED)
vres->flags |= DRM_BUDDY_CLEAR_ALLOCATION;
if (fpfn || lpfn != mgr->mm.size)
/* Allocate blocks in desired range */
vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
if (bo->flags & AMDGPU_GEM_CREATE_GFX12_DCC &&
adev->gmc.gmc_funcs->get_dcc_alignment)
adjust_dcc_size = amdgpu_gmc_get_dcc_alignment(adev);
remaining_size = (u64)vres->base.size;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS && adjust_dcc_size) {
unsigned int dcc_size;
dcc_size = roundup_pow_of_two(vres->base.size + adjust_dcc_size);
remaining_size = (u64)dcc_size;
vres->flags |= DRM_BUDDY_TRIM_DISABLE;
}
mutex_lock(&mgr->lock);
while (remaining_size) {
if (tbo->page_alignment)
min_block_size = (u64)tbo->page_alignment << PAGE_SHIFT;
else
min_block_size = mgr->default_page_size;
size = remaining_size;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS && adjust_dcc_size)
min_block_size = size;
else if ((size >= (u64)pages_per_block << PAGE_SHIFT) &&
!(size & (((u64)pages_per_block << PAGE_SHIFT) - 1)))
min_block_size = (u64)pages_per_block << PAGE_SHIFT;
BUG_ON(min_block_size < mm->chunk_size);
r = drm_buddy_alloc_blocks(mm, fpfn,
lpfn,
size,
min_block_size,
&vres->blocks,
vres->flags);
if (unlikely(r == -ENOSPC) && pages_per_block == ~0ul &&
!(place->flags & TTM_PL_FLAG_CONTIGUOUS)) {
vres->flags &= ~DRM_BUDDY_CONTIGUOUS_ALLOCATION;
pages_per_block = max_t(u32, 2UL << (20UL - PAGE_SHIFT),
tbo->page_alignment);
continue;
}
if (unlikely(r))
goto error_free_blocks;
if (size > remaining_size)
remaining_size = 0;
else
remaining_size -= size;
}
mutex_unlock(&mgr->lock);
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS && adjust_dcc_size) {
struct drm_buddy_block *dcc_block;
unsigned long dcc_start;
u64 trim_start;
dcc_block = amdgpu_vram_mgr_first_block(&vres->blocks);
/* Adjust the start address for DCC buffers only */
dcc_start =
roundup((unsigned long)amdgpu_vram_mgr_block_start(dcc_block),
adjust_dcc_size);
trim_start = (u64)dcc_start;
drm_buddy_block_trim(mm, &trim_start,
(u64)vres->base.size,
&vres->blocks);
}
vres->base.start = 0;
size = max_t(u64, amdgpu_vram_mgr_blocks_size(&vres->blocks),
vres->base.size);
list_for_each_entry(block, &vres->blocks, link) {
unsigned long start;
start = amdgpu_vram_mgr_block_start(block) +
amdgpu_vram_mgr_block_size(block);
start >>= PAGE_SHIFT;
if (start > PFN_UP(size))
start -= PFN_UP(size);
else
start = 0;
vres->base.start = max(vres->base.start, start);
vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
}
if (amdgpu_is_vram_mgr_blocks_contiguous(&vres->blocks))
vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
if (adev->gmc.xgmi.connected_to_cpu)
vres->base.bus.caching = ttm_cached;
else
vres->base.bus.caching = ttm_write_combined;
atomic64_add(vis_usage, &mgr->vis_usage);
*res = &vres->base;
return 0;
error_free_blocks:
drm_buddy_free_list(mm, &vres->blocks, 0);
mutex_unlock(&mgr->lock);
error_fini:
ttm_resource_fini(man, &vres->base);
kfree(vres);
return r;
}
/**
* amdgpu_vram_mgr_del - free ranges
*
* @man: TTM memory type manager
* @res: TTM memory object
*
* Free the allocated VRAM again.
*/
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 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;
mutex_lock(&mgr->lock);
list_for_each_entry(block, &vres->blocks, link)
vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
amdgpu_vram_mgr_do_reserve(man);
drm_buddy_free_list(mm, &vres->blocks, vres->flags);
mutex_unlock(&mgr->lock);
atomic64_sub(vis_usage, &mgr->vis_usage);
ttm_resource_fini(man, res);
kfree(vres);
}
/**
* amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
*
* @adev: amdgpu device pointer
* @res: TTM memory object
* @offset: byte offset from the base of VRAM BO
* @length: number of bytes to export in sg_table
* @dev: the other device
* @dir: dma direction
* @sgt: resulting sg table
*
* Allocate and fill a sg table from a VRAM allocation.
*/
int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
struct ttm_resource *res,
u64 offset, u64 length,
struct device *dev,
enum dma_data_direction dir,
struct sg_table **sgt)
{
struct amdgpu_res_cursor cursor;
struct scatterlist *sg;
int num_entries = 0;
int i, r;
*sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
if (!*sgt)
return -ENOMEM;
/* Determine the number of DRM_BUDDY blocks to export */
amdgpu_res_first(res, offset, length, &cursor);
while (cursor.remaining) {
num_entries++;
amdgpu_res_next(&cursor, min(cursor.size, AMDGPU_MAX_SG_SEGMENT_SIZE));
}
r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
if (r)
goto error_free;
/* Initialize scatterlist nodes of sg_table */
for_each_sgtable_sg((*sgt), sg, i)
sg->length = 0;
/*
* 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_BUDDY block(s) if more buffer needs to exported
*/
amdgpu_res_first(res, offset, length, &cursor);
for_each_sgtable_sg((*sgt), sg, i) {
phys_addr_t phys = cursor.start + adev->gmc.aper_base;
unsigned long size = min(cursor.size, AMDGPU_MAX_SG_SEGMENT_SIZE);
dma_addr_t addr;
addr = dma_map_resource(dev, phys, size, dir,
DMA_ATTR_SKIP_CPU_SYNC);
r = dma_mapping_error(dev, addr);
if (r)
goto error_unmap;
sg_set_page(sg, NULL, size, 0);
sg_dma_address(sg) = addr;
sg_dma_len(sg) = size;
amdgpu_res_next(&cursor, size);
}
return 0;
error_unmap:
for_each_sgtable_sg((*sgt), sg, i) {
if (!sg->length)
continue;
dma_unmap_resource(dev, sg->dma_address,
sg->length, dir,
DMA_ATTR_SKIP_CPU_SYNC);
}
sg_free_table(*sgt);
error_free:
kfree(*sgt);
return r;
}
/**
* amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
*
* @dev: device pointer
* @dir: data direction of resource to unmap
* @sgt: sg table to free
*
* Free a previously allocate sg table.
*/
void amdgpu_vram_mgr_free_sgt(struct device *dev,
enum dma_data_direction dir,
struct sg_table *sgt)
{
struct scatterlist *sg;
int i;
for_each_sgtable_sg(sgt, sg, i)
dma_unmap_resource(dev, sg->dma_address,
sg->length, dir,
DMA_ATTR_SKIP_CPU_SYNC);
sg_free_table(sgt);
kfree(sgt);
}
/**
* amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
*
* @mgr: amdgpu_vram_mgr pointer
*
* Returns how many bytes are used in the visible part of VRAM
*/
uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr)
{
return atomic64_read(&mgr->vis_usage);
}
/**
* amdgpu_vram_mgr_intersects - test each drm buddy block for intersection
*
* @man: TTM memory type manager
* @res: The resource to test
* @place: The place to test against
* @size: Size of the new allocation
*
* Test each drm buddy block for intersection for eviction decision.
*/
static bool amdgpu_vram_mgr_intersects(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
struct drm_buddy_block *block;
/* Check each drm buddy block individually */
list_for_each_entry(block, &mgr->blocks, link) {
unsigned long fpfn =
amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
unsigned long lpfn = fpfn +
(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
if (place->fpfn < lpfn &&
(!place->lpfn || place->lpfn > fpfn))
return true;
}
return false;
}
/**
* amdgpu_vram_mgr_compatible - test each drm buddy block for compatibility
*
* @man: TTM memory type manager
* @res: The resource to test
* @place: The place to test against
* @size: Size of the new allocation
*
* Test each drm buddy block for placement compatibility.
*/
static bool amdgpu_vram_mgr_compatible(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
struct amdgpu_vram_mgr_resource *mgr = to_amdgpu_vram_mgr_resource(res);
struct drm_buddy_block *block;
/* Check each drm buddy block individually */
list_for_each_entry(block, &mgr->blocks, link) {
unsigned long fpfn =
amdgpu_vram_mgr_block_start(block) >> PAGE_SHIFT;
unsigned long lpfn = fpfn +
(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
if (fpfn < place->fpfn ||
(place->lpfn && lpfn > place->lpfn))
return false;
}
return true;
}
/**
* amdgpu_vram_mgr_debug - dump VRAM table
*
* @man: TTM memory type manager
* @printer: DRM printer to use
*
* Dump the table content using printk.
*/
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 amdgpu_vram_reservation *rsv;
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(rsv, &mgr->reserved_pages, blocks)
drm_printf(printer, "%#018llx-%#018llx: %llu\n",
rsv->start, rsv->start + rsv->size, rsv->size);
mutex_unlock(&mgr->lock);
}
static const struct ttm_resource_manager_func amdgpu_dummy_vram_mgr_func = {
.alloc = amdgpu_dummy_vram_mgr_new,
.free = amdgpu_dummy_vram_mgr_del,
.intersects = amdgpu_dummy_vram_mgr_intersects,
.compatible = amdgpu_dummy_vram_mgr_compatible,
.debug = amdgpu_dummy_vram_mgr_debug
};
static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
.alloc = amdgpu_vram_mgr_new,
.free = amdgpu_vram_mgr_del,
.intersects = amdgpu_vram_mgr_intersects,
.compatible = amdgpu_vram_mgr_compatible,
.debug = amdgpu_vram_mgr_debug
};
/**
* amdgpu_vram_mgr_init - init VRAM manager and DRM MM
*
* @adev: amdgpu_device pointer
*
* Allocate and initialize the VRAM manager.
*/
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);
mutex_init(&mgr->lock);
INIT_LIST_HEAD(&mgr->reservations_pending);
INIT_LIST_HEAD(&mgr->reserved_pages);
mgr->default_page_size = PAGE_SIZE;
if (!adev->gmc.is_app_apu) {
man->func = &amdgpu_vram_mgr_func;
err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
if (err)
return err;
} else {
man->func = &amdgpu_dummy_vram_mgr_func;
DRM_INFO("Setup dummy vram mgr\n");
}
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
ttm_resource_manager_set_used(man, true);
return 0;
}
/**
* amdgpu_vram_mgr_fini - free and destroy VRAM manager
*
* @adev: amdgpu_device pointer
*
* Destroy and free the VRAM manager, returns -EBUSY if ranges are still
* allocated inside it.
*/
void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
{
struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
struct ttm_resource_manager *man = &mgr->manager;
int ret;
struct amdgpu_vram_reservation *rsv, *temp;
ttm_resource_manager_set_used(man, false);
ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
if (ret)
return;
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, blocks) {
drm_buddy_free_list(&mgr->mm, &rsv->allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
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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