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android-kvm / linux / 4fd84bc9692958cd07b3a3320dba26baa04a17d0 / . / drivers / gpu / drm / amd / amdgpu / amdgpu_object.c
blob: ac043baac05d6d234ee726794176cf624ccccb5e [file] [log] [blame]
/*
* Copyright 2009 Jerome Glisse.
* All Rights Reserved.
*
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
/*
* Authors:
* Jerome Glisse <glisse@freedesktop.org>
* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
* Dave Airlie
*/
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/dma-buf.h>
#include <drm/amdgpu_drm.h>
#include <drm/drm_cache.h>
#include "amdgpu.h"
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"
/**
* DOC: amdgpu_object
*
* This defines the interfaces to operate on an &amdgpu_bo buffer object which
* represents memory used by driver (VRAM, system memory, etc.). The driver
* provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
* to create/destroy/set buffer object which are then managed by the kernel TTM
* memory manager.
* The interfaces are also used internally by kernel clients, including gfx,
* uvd, etc. for kernel managed allocations used by the GPU.
*
*/
/**
* amdgpu_bo_subtract_pin_size - Remove BO from pin_size accounting
*
* @bo: &amdgpu_bo buffer object
*
* This function is called when a BO stops being pinned, and updates the
* &amdgpu_device pin_size values accordingly.
*/
static void amdgpu_bo_subtract_pin_size(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
&adev->visible_pin_size);
} else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
}
}
static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
if (bo->pin_count > 0)
amdgpu_bo_subtract_pin_size(bo);
amdgpu_bo_kunmap(bo);
if (bo->tbo.base.import_attach)
drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
drm_gem_object_release(&bo->tbo.base);
/* in case amdgpu_device_recover_vram got NULL of bo->parent */
if (!list_empty(&bo->shadow_list)) {
mutex_lock(&adev->shadow_list_lock);
list_del_init(&bo->shadow_list);
mutex_unlock(&adev->shadow_list_lock);
}
amdgpu_bo_unref(&bo->parent);
kfree(bo->metadata);
kfree(bo);
}
/**
* amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
* @bo: buffer object to be checked
*
* Uses destroy function associated with the object to determine if this is
* an &amdgpu_bo.
*
* Returns:
* true if the object belongs to &amdgpu_bo, false if not.
*/
bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
{
if (bo->destroy == &amdgpu_bo_destroy)
return true;
return false;
}
/**
* amdgpu_bo_placement_from_domain - set buffer's placement
* @abo: &amdgpu_bo buffer object whose placement is to be set
* @domain: requested domain
*
* Sets buffer's placement according to requested domain and the buffer's
* flags.
*/
void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
struct ttm_placement *placement = &abo->placement;
struct ttm_place *places = abo->placements;
u64 flags = abo->flags;
u32 c = 0;
if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = TTM_PL_VRAM;
places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED;
if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
places[c].lpfn = visible_pfn;
else
places[c].flags |= TTM_PL_FLAG_TOPDOWN;
if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
c++;
}
if (domain & AMDGPU_GEM_DOMAIN_GTT) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = TTM_PL_TT;
places[c].flags = 0;
if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
places[c].flags |= TTM_PL_FLAG_WC |
TTM_PL_FLAG_UNCACHED;
else
places[c].flags |= TTM_PL_FLAG_CACHED;
c++;
}
if (domain & AMDGPU_GEM_DOMAIN_CPU) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = TTM_PL_SYSTEM;
places[c].flags = 0;
if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
places[c].flags |= TTM_PL_FLAG_WC |
TTM_PL_FLAG_UNCACHED;
else
places[c].flags |= TTM_PL_FLAG_CACHED;
c++;
}
if (domain & AMDGPU_GEM_DOMAIN_GDS) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = AMDGPU_PL_GDS;
places[c].flags = TTM_PL_FLAG_UNCACHED;
c++;
}
if (domain & AMDGPU_GEM_DOMAIN_GWS) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = AMDGPU_PL_GWS;
places[c].flags = TTM_PL_FLAG_UNCACHED;
c++;
}
if (domain & AMDGPU_GEM_DOMAIN_OA) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = AMDGPU_PL_OA;
places[c].flags = TTM_PL_FLAG_UNCACHED;
c++;
}
if (!c) {
places[c].fpfn = 0;
places[c].lpfn = 0;
places[c].mem_type = TTM_PL_SYSTEM;
places[c].flags = TTM_PL_MASK_CACHING;
c++;
}
BUG_ON(c >= AMDGPU_BO_MAX_PLACEMENTS);
placement->num_placement = c;
placement->placement = places;
placement->num_busy_placement = c;
placement->busy_placement = places;
}
/**
* amdgpu_bo_create_reserved - create reserved BO for kernel use
*
* @adev: amdgpu device object
* @size: size for the new BO
* @align: alignment for the new BO
* @domain: where to place it
* @bo_ptr: used to initialize BOs in structures
* @gpu_addr: GPU addr of the pinned BO
* @cpu_addr: optional CPU address mapping
*
* Allocates and pins a BO for kernel internal use, and returns it still
* reserved.
*
* Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
*
* Returns:
* 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
unsigned long size, int align,
u32 domain, struct amdgpu_bo **bo_ptr,
u64 *gpu_addr, void **cpu_addr)
{
struct amdgpu_bo_param bp;
bool free = false;
int r;
if (!size) {
amdgpu_bo_unref(bo_ptr);
return 0;
}
memset(&bp, 0, sizeof(bp));
bp.size = size;
bp.byte_align = align;
bp.domain = domain;
bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
: AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
bp.type = ttm_bo_type_kernel;
bp.resv = NULL;
if (!*bo_ptr) {
r = amdgpu_bo_create(adev, &bp, bo_ptr);
if (r) {
dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
r);
return r;
}
free = true;
}
r = amdgpu_bo_reserve(*bo_ptr, false);
if (r) {
dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
goto error_free;
}
r = amdgpu_bo_pin(*bo_ptr, domain);
if (r) {
dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
goto error_unreserve;
}
r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
if (r) {
dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
goto error_unpin;
}
if (gpu_addr)
*gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
if (cpu_addr) {
r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
if (r) {
dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
goto error_unpin;
}
}
return 0;
error_unpin:
amdgpu_bo_unpin(*bo_ptr);
error_unreserve:
amdgpu_bo_unreserve(*bo_ptr);
error_free:
if (free)
amdgpu_bo_unref(bo_ptr);
return r;
}
/**
* amdgpu_bo_create_kernel - create BO for kernel use
*
* @adev: amdgpu device object
* @size: size for the new BO
* @align: alignment for the new BO
* @domain: where to place it
* @bo_ptr: used to initialize BOs in structures
* @gpu_addr: GPU addr of the pinned BO
* @cpu_addr: optional CPU address mapping
*
* Allocates and pins a BO for kernel internal use.
*
* Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
*
* Returns:
* 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
unsigned long size, int align,
u32 domain, struct amdgpu_bo **bo_ptr,
u64 *gpu_addr, void **cpu_addr)
{
int r;
r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
gpu_addr, cpu_addr);
if (r)
return r;
if (*bo_ptr)
amdgpu_bo_unreserve(*bo_ptr);
return 0;
}
/**
* amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
*
* @adev: amdgpu device object
* @offset: offset of the BO
* @size: size of the BO
* @domain: where to place it
* @bo_ptr: used to initialize BOs in structures
* @cpu_addr: optional CPU address mapping
*
* Creates a kernel BO at a specific offset in the address space of the domain.
*
* Returns:
* 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
uint64_t offset, uint64_t size, uint32_t domain,
struct amdgpu_bo **bo_ptr, void **cpu_addr)
{
struct ttm_operation_ctx ctx = { false, false };
unsigned int i;
int r;
offset &= PAGE_MASK;
size = ALIGN(size, PAGE_SIZE);
r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE, domain, bo_ptr,
NULL, cpu_addr);
if (r)
return r;
if ((*bo_ptr) == NULL)
return 0;
/*
* Remove the original mem node and create a new one at the request
* position.
*/
if (cpu_addr)
amdgpu_bo_kunmap(*bo_ptr);
ttm_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.mem);
for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) {
(*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT;
(*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
}
r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement,
&(*bo_ptr)->tbo.mem, &ctx);
if (r)
goto error;
if (cpu_addr) {
r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
if (r)
goto error;
}
amdgpu_bo_unreserve(*bo_ptr);
return 0;
error:
amdgpu_bo_unreserve(*bo_ptr);
amdgpu_bo_unref(bo_ptr);
return r;
}
/**
* amdgpu_bo_free_kernel - free BO for kernel use
*
* @bo: amdgpu BO to free
* @gpu_addr: pointer to where the BO's GPU memory space address was stored
* @cpu_addr: pointer to where the BO's CPU memory space address was stored
*
* unmaps and unpin a BO for kernel internal use.
*/
void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
void **cpu_addr)
{
if (*bo == NULL)
return;
if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
if (cpu_addr)
amdgpu_bo_kunmap(*bo);
amdgpu_bo_unpin(*bo);
amdgpu_bo_unreserve(*bo);
}
amdgpu_bo_unref(bo);
if (gpu_addr)
*gpu_addr = 0;
if (cpu_addr)
*cpu_addr = NULL;
}
/* Validate bo size is bit bigger then the request domain */
static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
unsigned long size, u32 domain)
{
struct ttm_resource_manager *man = NULL;
/*
* If GTT is part of requested domains the check must succeed to
* allow fall back to GTT
*/
if (domain & AMDGPU_GEM_DOMAIN_GTT) {
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
if (size < (man->size << PAGE_SHIFT))
return true;
else
goto fail;
}
if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
if (size < (man->size << PAGE_SHIFT))
return true;
else
goto fail;
}
/* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU */
return true;
fail:
DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size,
man->size << PAGE_SHIFT);
return false;
}
bool amdgpu_bo_support_uswc(u64 bo_flags)
{
#ifdef CONFIG_X86_32
/* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
* See https://bugs.freedesktop.org/show_bug.cgi?id=84627
*/
return false;
#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
/* Don't try to enable write-combining when it can't work, or things
* may be slow
* See https://bugs.freedesktop.org/show_bug.cgi?id=88758
*/
#ifndef CONFIG_COMPILE_TEST
#warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
thanks to write-combining
#endif
if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
"better performance thanks to write-combining\n");
return false;
#else
/* For architectures that don't support WC memory,
* mask out the WC flag from the BO
*/
if (!drm_arch_can_wc_memory())
return false;
return true;
#endif
}
static int amdgpu_bo_do_create(struct amdgpu_device *adev,
struct amdgpu_bo_param *bp,
struct amdgpu_bo **bo_ptr)
{
struct ttm_operation_ctx ctx = {
.interruptible = (bp->type != ttm_bo_type_kernel),
.no_wait_gpu = bp->no_wait_gpu,
.resv = bp->resv,
.flags = bp->type != ttm_bo_type_kernel ?
TTM_OPT_FLAG_ALLOW_RES_EVICT : 0
};
struct amdgpu_bo *bo;
unsigned long page_align, size = bp->size;
size_t acc_size;
int r;
/* Note that GDS/GWS/OA allocates 1 page per byte/resource. */
if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
/* GWS and OA don't need any alignment. */
page_align = bp->byte_align;
size <<= PAGE_SHIFT;
} else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) {
/* Both size and alignment must be a multiple of 4. */
page_align = ALIGN(bp->byte_align, 4);
size = ALIGN(size, 4) << PAGE_SHIFT;
} else {
/* Memory should be aligned at least to a page size. */
page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT;
size = ALIGN(size, PAGE_SIZE);
}
if (!amdgpu_bo_validate_size(adev, size, bp->domain))
return -ENOMEM;
*bo_ptr = NULL;
acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
sizeof(struct amdgpu_bo));
bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
if (bo == NULL)
return -ENOMEM;
drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size);
INIT_LIST_HEAD(&bo->shadow_list);
bo->vm_bo = NULL;
bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain :
bp->domain;
bo->allowed_domains = bo->preferred_domains;
if (bp->type != ttm_bo_type_kernel &&
bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
bo->flags = bp->flags;
if (!amdgpu_bo_support_uswc(bo->flags))
bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
bo->tbo.bdev = &adev->mman.bdev;
if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
AMDGPU_GEM_DOMAIN_GDS))
amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
else
amdgpu_bo_placement_from_domain(bo, bp->domain);
if (bp->type == ttm_bo_type_kernel)
bo->tbo.priority = 1;
r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, bp->type,
&bo->placement, page_align, &ctx, acc_size,
NULL, bp->resv, &amdgpu_bo_destroy);
if (unlikely(r != 0))
return r;
if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
bo->tbo.mem.mem_type == TTM_PL_VRAM &&
bo->tbo.mem.start < adev->gmc.visible_vram_size >> PAGE_SHIFT)
amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
ctx.bytes_moved);
else
amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0);
if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
bo->tbo.mem.mem_type == TTM_PL_VRAM) {
struct dma_fence *fence;
r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence);
if (unlikely(r))
goto fail_unreserve;
amdgpu_bo_fence(bo, fence, false);
dma_fence_put(bo->tbo.moving);
bo->tbo.moving = dma_fence_get(fence);
dma_fence_put(fence);
}
if (!bp->resv)
amdgpu_bo_unreserve(bo);
*bo_ptr = bo;
trace_amdgpu_bo_create(bo);
/* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
if (bp->type == ttm_bo_type_device)
bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
return 0;
fail_unreserve:
if (!bp->resv)
dma_resv_unlock(bo->tbo.base.resv);
amdgpu_bo_unref(&bo);
return r;
}
static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
unsigned long size,
struct amdgpu_bo *bo)
{
struct amdgpu_bo_param bp;
int r;
if (bo->shadow)
return 0;
memset(&bp, 0, sizeof(bp));
bp.size = size;
bp.domain = AMDGPU_GEM_DOMAIN_GTT;
bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC |
AMDGPU_GEM_CREATE_SHADOW;
bp.type = ttm_bo_type_kernel;
bp.resv = bo->tbo.base.resv;
r = amdgpu_bo_do_create(adev, &bp, &bo->shadow);
if (!r) {
bo->shadow->parent = amdgpu_bo_ref(bo);
mutex_lock(&adev->shadow_list_lock);
list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list);
mutex_unlock(&adev->shadow_list_lock);
}
return r;
}
/**
* amdgpu_bo_create - create an &amdgpu_bo buffer object
* @adev: amdgpu device object
* @bp: parameters to be used for the buffer object
* @bo_ptr: pointer to the buffer object pointer
*
* Creates an &amdgpu_bo buffer object; and if requested, also creates a
* shadow object.
* Shadow object is used to backup the original buffer object, and is always
* in GTT.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_create(struct amdgpu_device *adev,
struct amdgpu_bo_param *bp,
struct amdgpu_bo **bo_ptr)
{
u64 flags = bp->flags;
int r;
bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW;
r = amdgpu_bo_do_create(adev, bp, bo_ptr);
if (r)
return r;
if ((flags & AMDGPU_GEM_CREATE_SHADOW) && !(adev->flags & AMD_IS_APU)) {
if (!bp->resv)
WARN_ON(dma_resv_lock((*bo_ptr)->tbo.base.resv,
NULL));
r = amdgpu_bo_create_shadow(adev, bp->size, *bo_ptr);
if (!bp->resv)
dma_resv_unlock((*bo_ptr)->tbo.base.resv);
if (r)
amdgpu_bo_unref(bo_ptr);
}
return r;
}
/**
* amdgpu_bo_validate - validate an &amdgpu_bo buffer object
* @bo: pointer to the buffer object
*
* Sets placement according to domain; and changes placement and caching
* policy of the buffer object according to the placement.
* This is used for validating shadow bos. It calls ttm_bo_validate() to
* make sure the buffer is resident where it needs to be.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_validate(struct amdgpu_bo *bo)
{
struct ttm_operation_ctx ctx = { false, false };
uint32_t domain;
int r;
if (bo->pin_count)
return 0;
domain = bo->preferred_domains;
retry:
amdgpu_bo_placement_from_domain(bo, domain);
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
domain = bo->allowed_domains;
goto retry;
}
return r;
}
/**
* amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow
*
* @shadow: &amdgpu_bo shadow to be restored
* @fence: dma_fence associated with the operation
*
* Copies a buffer object's shadow content back to the object.
* This is used for recovering a buffer from its shadow in case of a gpu
* reset where vram context may be lost.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev);
struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
uint64_t shadow_addr, parent_addr;
shadow_addr = amdgpu_bo_gpu_offset(shadow);
parent_addr = amdgpu_bo_gpu_offset(shadow->parent);
return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
amdgpu_bo_size(shadow), NULL, fence,
true, false, false);
}
/**
* amdgpu_bo_kmap - map an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object to be mapped
* @ptr: kernel virtual address to be returned
*
* Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
* amdgpu_bo_kptr() to get the kernel virtual address.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
{
void *kptr;
long r;
if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
return -EPERM;
kptr = amdgpu_bo_kptr(bo);
if (kptr) {
if (ptr)
*ptr = kptr;
return 0;
}
r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, false, false,
MAX_SCHEDULE_TIMEOUT);
if (r < 0)
return r;
r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
if (r)
return r;
if (ptr)
*ptr = amdgpu_bo_kptr(bo);
return 0;
}
/**
* amdgpu_bo_kptr - returns a kernel virtual address of the buffer object
* @bo: &amdgpu_bo buffer object
*
* Calls ttm_kmap_obj_virtual() to get the kernel virtual address
*
* Returns:
* the virtual address of a buffer object area.
*/
void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
{
bool is_iomem;
return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
}
/**
* amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object to be unmapped
*
* Unmaps a kernel map set up by amdgpu_bo_kmap().
*/
void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
{
if (bo->kmap.bo)
ttm_bo_kunmap(&bo->kmap);
}
/**
* amdgpu_bo_ref - reference an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object
*
* References the contained &ttm_buffer_object.
*
* Returns:
* a refcounted pointer to the &amdgpu_bo buffer object.
*/
struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
{
if (bo == NULL)
return NULL;
ttm_bo_get(&bo->tbo);
return bo;
}
/**
* amdgpu_bo_unref - unreference an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object
*
* Unreferences the contained &ttm_buffer_object and clear the pointer
*/
void amdgpu_bo_unref(struct amdgpu_bo **bo)
{
struct ttm_buffer_object *tbo;
if ((*bo) == NULL)
return;
tbo = &((*bo)->tbo);
ttm_bo_put(tbo);
*bo = NULL;
}
/**
* amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object to be pinned
* @domain: domain to be pinned to
* @min_offset: the start of requested address range
* @max_offset: the end of requested address range
*
* Pins the buffer object according to requested domain and address range. If
* the memory is unbound gart memory, binds the pages into gart table. Adjusts
* pin_count and pin_size accordingly.
*
* Pinning means to lock pages in memory along with keeping them at a fixed
* offset. It is required when a buffer can not be moved, for example, when
* a display buffer is being scanned out.
*
* Compared with amdgpu_bo_pin(), this function gives more flexibility on
* where to pin a buffer if there are specific restrictions on where a buffer
* must be located.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
u64 min_offset, u64 max_offset)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_operation_ctx ctx = { false, false };
int r, i;
if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
return -EPERM;
if (WARN_ON_ONCE(min_offset > max_offset))
return -EINVAL;
/* A shared bo cannot be migrated to VRAM */
if (bo->prime_shared_count) {
if (domain & AMDGPU_GEM_DOMAIN_GTT)
domain = AMDGPU_GEM_DOMAIN_GTT;
else
return -EINVAL;
}
/* This assumes only APU display buffers are pinned with (VRAM|GTT).
* See function amdgpu_display_supported_domains()
*/
domain = amdgpu_bo_get_preferred_pin_domain(adev, domain);
if (bo->pin_count) {
uint32_t mem_type = bo->tbo.mem.mem_type;
if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
return -EINVAL;
bo->pin_count++;
if (max_offset != 0) {
u64 domain_start = amdgpu_ttm_domain_start(adev,
mem_type);
WARN_ON_ONCE(max_offset <
(amdgpu_bo_gpu_offset(bo) - domain_start));
}
return 0;
}
if (bo->tbo.base.import_attach)
dma_buf_pin(bo->tbo.base.import_attach);
bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
/* force to pin into visible video ram */
if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
amdgpu_bo_placement_from_domain(bo, domain);
for (i = 0; i < bo->placement.num_placement; i++) {
unsigned fpfn, lpfn;
fpfn = min_offset >> PAGE_SHIFT;
lpfn = max_offset >> PAGE_SHIFT;
if (fpfn > bo->placements[i].fpfn)
bo->placements[i].fpfn = fpfn;
if (!bo->placements[i].lpfn ||
(lpfn && lpfn < bo->placements[i].lpfn))
bo->placements[i].lpfn = lpfn;
bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
}
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (unlikely(r)) {
dev_err(adev->dev, "%p pin failed\n", bo);
goto error;
}
bo->pin_count = 1;
domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
&adev->visible_pin_size);
} else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
}
error:
return r;
}
/**
* amdgpu_bo_pin - pin an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object to be pinned
* @domain: domain to be pinned to
*
* A simple wrapper to amdgpu_bo_pin_restricted().
* Provides a simpler API for buffers that do not have any strict restrictions
* on where a buffer must be located.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
{
return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
}
/**
* amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
* @bo: &amdgpu_bo buffer object to be unpinned
*
* Decreases the pin_count, and clears the flags if pin_count reaches 0.
* Changes placement and pin size accordingly.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_unpin(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_operation_ctx ctx = { false, false };
int r, i;
if (WARN_ON_ONCE(!bo->pin_count)) {
dev_warn(adev->dev, "%p unpin not necessary\n", bo);
return 0;
}
bo->pin_count--;
if (bo->pin_count)
return 0;
amdgpu_bo_subtract_pin_size(bo);
if (bo->tbo.base.import_attach)
dma_buf_unpin(bo->tbo.base.import_attach);
for (i = 0; i < bo->placement.num_placement; i++) {
bo->placements[i].lpfn = 0;
bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
}
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (unlikely(r))
dev_err(adev->dev, "%p validate failed for unpin\n", bo);
return r;
}
/**
* amdgpu_bo_evict_vram - evict VRAM buffers
* @adev: amdgpu device object
*
* Evicts all VRAM buffers on the lru list of the memory type.
* Mainly used for evicting vram at suspend time.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
{
/* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
#ifndef CONFIG_HIBERNATION
if (adev->flags & AMD_IS_APU) {
/* Useless to evict on IGP chips */
return 0;
}
#endif
return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
}
static const char *amdgpu_vram_names[] = {
"UNKNOWN",
"GDDR1",
"DDR2",
"GDDR3",
"GDDR4",
"GDDR5",
"HBM",
"DDR3",
"DDR4",
"GDDR6",
};
/**
* amdgpu_bo_init - initialize memory manager
* @adev: amdgpu device object
*
* Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_init(struct amdgpu_device *adev)
{
/* reserve PAT memory space to WC for VRAM */
arch_io_reserve_memtype_wc(adev->gmc.aper_base,
adev->gmc.aper_size);
/* Add an MTRR for the VRAM */
adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base,
adev->gmc.aper_size);
DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
adev->gmc.mc_vram_size >> 20,
(unsigned long long)adev->gmc.aper_size >> 20);
DRM_INFO("RAM width %dbits %s\n",
adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
return amdgpu_ttm_init(adev);
}
/**
* amdgpu_bo_late_init - late init
* @adev: amdgpu device object
*
* Calls amdgpu_ttm_late_init() to free resources used earlier during
* initialization.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_late_init(struct amdgpu_device *adev)
{
amdgpu_ttm_late_init(adev);
return 0;
}
/**
* amdgpu_bo_fini - tear down memory manager
* @adev: amdgpu device object
*
* Reverses amdgpu_bo_init() to tear down memory manager.
*/
void amdgpu_bo_fini(struct amdgpu_device *adev)
{
amdgpu_ttm_fini(adev);
arch_phys_wc_del(adev->gmc.vram_mtrr);
arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
}
/**
* amdgpu_bo_fbdev_mmap - mmap fbdev memory
* @bo: &amdgpu_bo buffer object
* @vma: vma as input from the fbdev mmap method
*
* Calls ttm_fbdev_mmap() to mmap fbdev memory if it is backed by a bo.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
struct vm_area_struct *vma)
{
if (vma->vm_pgoff != 0)
return -EACCES;
return ttm_bo_mmap_obj(vma, &bo->tbo);
}
/**
* amdgpu_bo_set_tiling_flags - set tiling flags
* @bo: &amdgpu_bo buffer object
* @tiling_flags: new flags
*
* Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
* kernel driver to set the tiling flags on a buffer.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
if (adev->family <= AMDGPU_FAMILY_CZ &&
AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
return -EINVAL;
bo->tiling_flags = tiling_flags;
return 0;
}
/**
* amdgpu_bo_get_tiling_flags - get tiling flags
* @bo: &amdgpu_bo buffer object
* @tiling_flags: returned flags
*
* Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
* set the tiling flags on a buffer.
*/
void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
{
dma_resv_assert_held(bo->tbo.base.resv);
if (tiling_flags)
*tiling_flags = bo->tiling_flags;
}
/**
* amdgpu_bo_set_metadata - set metadata
* @bo: &amdgpu_bo buffer object
* @metadata: new metadata
* @metadata_size: size of the new metadata
* @flags: flags of the new metadata
*
* Sets buffer object's metadata, its size and flags.
* Used via GEM ioctl.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
uint32_t metadata_size, uint64_t flags)
{
void *buffer;
if (!metadata_size) {
if (bo->metadata_size) {
kfree(bo->metadata);
bo->metadata = NULL;
bo->metadata_size = 0;
}
return 0;
}
if (metadata == NULL)
return -EINVAL;
buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
if (buffer == NULL)
return -ENOMEM;
kfree(bo->metadata);
bo->metadata_flags = flags;
bo->metadata = buffer;
bo->metadata_size = metadata_size;
return 0;
}
/**
* amdgpu_bo_get_metadata - get metadata
* @bo: &amdgpu_bo buffer object
* @buffer: returned metadata
* @buffer_size: size of the buffer
* @metadata_size: size of the returned metadata
* @flags: flags of the returned metadata
*
* Gets buffer object's metadata, its size and flags. buffer_size shall not be
* less than metadata_size.
* Used via GEM ioctl.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
size_t buffer_size, uint32_t *metadata_size,
uint64_t *flags)
{
if (!buffer && !metadata_size)
return -EINVAL;
if (buffer) {
if (buffer_size < bo->metadata_size)
return -EINVAL;
if (bo->metadata_size)
memcpy(buffer, bo->metadata, bo->metadata_size);
}
if (metadata_size)
*metadata_size = bo->metadata_size;
if (flags)
*flags = bo->metadata_flags;
return 0;
}
/**
* amdgpu_bo_move_notify - notification about a memory move
* @bo: pointer to a buffer object
* @evict: if this move is evicting the buffer from the graphics address space
* @new_mem: new information of the bufer object
*
* Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
* bookkeeping.
* TTM driver callback which is called when ttm moves a buffer.
*/
void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
bool evict,
struct ttm_resource *new_mem)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct amdgpu_bo *abo;
struct ttm_resource *old_mem = &bo->mem;
if (!amdgpu_bo_is_amdgpu_bo(bo))
return;
abo = ttm_to_amdgpu_bo(bo);
amdgpu_vm_bo_invalidate(adev, abo, evict);
amdgpu_bo_kunmap(abo);
if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
bo->mem.mem_type != TTM_PL_SYSTEM)
dma_buf_move_notify(abo->tbo.base.dma_buf);
/* remember the eviction */
if (evict)
atomic64_inc(&adev->num_evictions);
/* update statistics */
if (!new_mem)
return;
/* move_notify is called before move happens */
trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
}
/**
* amdgpu_bo_release_notify - notification about a BO being released
* @bo: pointer to a buffer object
*
* Wipes VRAM buffers whose contents should not be leaked before the
* memory is released.
*/
void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
{
struct dma_fence *fence = NULL;
struct amdgpu_bo *abo;
int r;
if (!amdgpu_bo_is_amdgpu_bo(bo))
return;
abo = ttm_to_amdgpu_bo(bo);
if (abo->kfd_bo)
amdgpu_amdkfd_unreserve_memory_limit(abo);
/* We only remove the fence if the resv has individualized. */
WARN_ON_ONCE(bo->type == ttm_bo_type_kernel
&& bo->base.resv != &bo->base._resv);
if (bo->base.resv == &bo->base._resv)
amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
if (bo->mem.mem_type != TTM_PL_VRAM || !bo->mem.mm_node ||
!(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE))
return;
dma_resv_lock(bo->base.resv, NULL);
r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence);
if (!WARN_ON(r)) {
amdgpu_bo_fence(abo, fence, false);
dma_fence_put(fence);
}
dma_resv_unlock(bo->base.resv);
}
/**
* amdgpu_bo_fault_reserve_notify - notification about a memory fault
* @bo: pointer to a buffer object
*
* Notifies the driver we are taking a fault on this BO and have reserved it,
* also performs bookkeeping.
* TTM driver callback for dealing with vm faults.
*
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct ttm_operation_ctx ctx = { false, false };
struct amdgpu_bo *abo;
unsigned long offset, size;
int r;
if (!amdgpu_bo_is_amdgpu_bo(bo))
return 0;
abo = ttm_to_amdgpu_bo(bo);
/* Remember that this BO was accessed by the CPU */
abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
if (bo->mem.mem_type != TTM_PL_VRAM)
return 0;
size = bo->mem.num_pages << PAGE_SHIFT;
offset = bo->mem.start << PAGE_SHIFT;
if ((offset + size) <= adev->gmc.visible_vram_size)
return 0;
/* Can't move a pinned BO to visible VRAM */
if (abo->pin_count > 0)
return -EINVAL;
/* hurrah the memory is not visible ! */
atomic64_inc(&adev->num_vram_cpu_page_faults);
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
AMDGPU_GEM_DOMAIN_GTT);
/* Avoid costly evictions; only set GTT as a busy placement */
abo->placement.num_busy_placement = 1;
abo->placement.busy_placement = &abo->placements[1];
r = ttm_bo_validate(bo, &abo->placement, &ctx);
if (unlikely(r != 0))
return r;
offset = bo->mem.start << PAGE_SHIFT;
/* this should never happen */
if (bo->mem.mem_type == TTM_PL_VRAM &&
(offset + size) > adev->gmc.visible_vram_size)
return -EINVAL;
return 0;
}
/**
* amdgpu_bo_fence - add fence to buffer object
*
* @bo: buffer object in question
* @fence: fence to add
* @shared: true if fence should be added shared
*
*/
void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
bool shared)
{
struct dma_resv *resv = bo->tbo.base.resv;
if (shared)
dma_resv_add_shared_fence(resv, fence);
else
dma_resv_add_excl_fence(resv, fence);
}
/**
* amdgpu_bo_sync_wait_resv - Wait for BO reservation fences
*
* @adev: amdgpu device pointer
* @resv: reservation object to sync to
* @sync_mode: synchronization mode
* @owner: fence owner
* @intr: Whether the wait is interruptible
*
* Extract the fences from the reservation object and waits for them to finish.
*
* Returns:
* 0 on success, errno otherwise.
*/
int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv,
enum amdgpu_sync_mode sync_mode, void *owner,
bool intr)
{
struct amdgpu_sync sync;
int r;
amdgpu_sync_create(&sync);
amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner);
r = amdgpu_sync_wait(&sync, intr);
amdgpu_sync_free(&sync);
return r;
}
/**
* amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv
* @bo: buffer object to wait for
* @owner: fence owner
* @intr: Whether the wait is interruptible
*
* Wrapper to wait for fences in a BO.
* Returns:
* 0 on success, errno otherwise.
*/
int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv,
AMDGPU_SYNC_NE_OWNER, owner, intr);
}
/**
* amdgpu_bo_gpu_offset - return GPU offset of bo
* @bo: amdgpu object for which we query the offset
*
* Note: object should either be pinned or reserved when calling this
* function, it might be useful to add check for this for debugging.
*
* Returns:
* current GPU offset of the object.
*/
u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
{
WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
!bo->pin_count && bo->tbo.type != ttm_bo_type_kernel);
WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
!(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
return amdgpu_bo_gpu_offset_no_check(bo);
}
/**
* amdgpu_bo_gpu_offset_no_check - return GPU offset of bo
* @bo: amdgpu object for which we query the offset
*
* Returns:
* current GPU offset of the object without raising warnings.
*/
u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
uint64_t offset;
offset = (bo->tbo.mem.start << PAGE_SHIFT) +
amdgpu_ttm_domain_start(adev, bo->tbo.mem.mem_type);
return amdgpu_gmc_sign_extend(offset);
}
/**
* amdgpu_bo_get_preferred_pin_domain - get preferred domain for scanout
* @adev: amdgpu device object
* @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
*
* Returns:
* Which of the allowed domains is preferred for pinning the BO for scanout.
*/
uint32_t amdgpu_bo_get_preferred_pin_domain(struct amdgpu_device *adev,
uint32_t domain)
{
if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
domain = AMDGPU_GEM_DOMAIN_VRAM;
if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
domain = AMDGPU_GEM_DOMAIN_GTT;
}
return domain;
}