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kernel_samsung_a34x-permissive/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

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Import A346BXXU1AWB9 kernel source Android 13
2024-04-28 06:49:01 -07:00
/*
* 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 <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/drmP.h>
#include <drm/amdgpu_drm.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/swiotlb.h>
#include <linux/swap.h>
#include <linux/pagemap.h>
#include <linux/debugfs.h>
#include <linux/iommu.h>
#include "amdgpu.h"
#include "amdgpu_object.h"
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"
#include "bif/bif_4_1_d.h"
#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem, unsigned num_pages,
uint64_t offset, unsigned window,
struct amdgpu_ring *ring,
uint64_t *addr);
static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev);
/*
* Global memory.
*/
/**
* amdgpu_ttm_mem_global_init - Initialize and acquire reference to
* memory object
*
* @ref: Object for initialization.
*
* This is called by drm_global_item_ref() when an object is being
* initialized.
*/
static int amdgpu_ttm_mem_global_init(struct drm_global_reference *ref)
{
return ttm_mem_global_init(ref->object);
}
/**
* amdgpu_ttm_mem_global_release - Drop reference to a memory object
*
* @ref: Object being removed
*
* This is called by drm_global_item_unref() when an object is being
* released.
*/
static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
{
ttm_mem_global_release(ref->object);
}
/**
* amdgpu_ttm_global_init - Initialize global TTM memory reference structures.
*
* @adev: AMDGPU device for which the global structures need to be registered.
*
* This is called as part of the AMDGPU ttm init from amdgpu_ttm_init()
* during bring up.
*/
static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
{
struct drm_global_reference *global_ref;
int r;
/* ensure reference is false in case init fails */
adev->mman.mem_global_referenced = false;
global_ref = &adev->mman.mem_global_ref;
global_ref->global_type = DRM_GLOBAL_TTM_MEM;
global_ref->size = sizeof(struct ttm_mem_global);
global_ref->init = &amdgpu_ttm_mem_global_init;
global_ref->release = &amdgpu_ttm_mem_global_release;
r = drm_global_item_ref(global_ref);
if (r) {
DRM_ERROR("Failed setting up TTM memory accounting "
"subsystem.\n");
goto error_mem;
}
adev->mman.bo_global_ref.mem_glob =
adev->mman.mem_global_ref.object;
global_ref = &adev->mman.bo_global_ref.ref;
global_ref->global_type = DRM_GLOBAL_TTM_BO;
global_ref->size = sizeof(struct ttm_bo_global);
global_ref->init = &ttm_bo_global_init;
global_ref->release = &ttm_bo_global_release;
r = drm_global_item_ref(global_ref);
if (r) {
DRM_ERROR("Failed setting up TTM BO subsystem.\n");
goto error_bo;
}
mutex_init(&adev->mman.gtt_window_lock);
adev->mman.mem_global_referenced = true;
return 0;
error_bo:
drm_global_item_unref(&adev->mman.mem_global_ref);
error_mem:
return r;
}
static void amdgpu_ttm_global_fini(struct amdgpu_device *adev)
{
if (adev->mman.mem_global_referenced) {
mutex_destroy(&adev->mman.gtt_window_lock);
drm_global_item_unref(&adev->mman.bo_global_ref.ref);
drm_global_item_unref(&adev->mman.mem_global_ref);
adev->mman.mem_global_referenced = false;
}
}
static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
}
/**
* amdgpu_init_mem_type - Initialize a memory manager for a specific type of
* memory request.
*
* @bdev: The TTM BO device object (contains a reference to amdgpu_device)
* @type: The type of memory requested
* @man: The memory type manager for each domain
*
* This is called by ttm_bo_init_mm() when a buffer object is being
* initialized.
*/
static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man)
{
struct amdgpu_device *adev;
adev = amdgpu_ttm_adev(bdev);
switch (type) {
case TTM_PL_SYSTEM:
/* System memory */
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case TTM_PL_TT:
/* GTT memory */
man->func = &amdgpu_gtt_mgr_func;
man->gpu_offset = adev->gmc.gart_start;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
break;
case TTM_PL_VRAM:
/* "On-card" video ram */
man->func = &amdgpu_vram_mgr_func;
man->gpu_offset = adev->gmc.vram_start;
man->flags = TTM_MEMTYPE_FLAG_FIXED |
TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
man->default_caching = TTM_PL_FLAG_WC;
break;
case AMDGPU_PL_GDS:
case AMDGPU_PL_GWS:
case AMDGPU_PL_OA:
/* On-chip GDS memory*/
man->func = &ttm_bo_manager_func;
man->gpu_offset = 0;
man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_CMA;
man->available_caching = TTM_PL_FLAG_UNCACHED;
man->default_caching = TTM_PL_FLAG_UNCACHED;
break;
default:
DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
return -EINVAL;
}
return 0;
}
/**
* amdgpu_evict_flags - Compute placement flags
*
* @bo: The buffer object to evict
* @placement: Possible destination(s) for evicted BO
*
* Fill in placement data when ttm_bo_evict() is called
*/
static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct amdgpu_bo *abo;
static const struct ttm_place placements = {
.fpfn = 0,
.lpfn = 0,
.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
};
/* Don't handle scatter gather BOs */
if (bo->type == ttm_bo_type_sg) {
placement->num_placement = 0;
placement->num_busy_placement = 0;
return;
}
/* Object isn't an AMDGPU object so ignore */
if (!amdgpu_bo_is_amdgpu_bo(bo)) {
placement->placement = &placements;
placement->busy_placement = &placements;
placement->num_placement = 1;
placement->num_busy_placement = 1;
return;
}
abo = ttm_to_amdgpu_bo(bo);
switch (bo->mem.mem_type) {
case TTM_PL_VRAM:
if (!adev->mman.buffer_funcs_enabled) {
/* Move to system memory */
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
} else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
!(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
amdgpu_bo_in_cpu_visible_vram(abo)) {
/* Try evicting to the CPU inaccessible part of VRAM
* first, but only set GTT as busy placement, so this
* BO will be evicted to GTT rather than causing other
* BOs to be evicted from VRAM
*/
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
AMDGPU_GEM_DOMAIN_GTT);
abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
abo->placements[0].lpfn = 0;
abo->placement.busy_placement = &abo->placements[1];
abo->placement.num_busy_placement = 1;
} else {
/* Move to GTT memory */
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
}
break;
case TTM_PL_TT:
default:
amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
}
*placement = abo->placement;
}
/**
* amdgpu_verify_access - Verify access for a mmap call
*
* @bo: The buffer object to map
* @filp: The file pointer from the process performing the mmap
*
* This is called by ttm_bo_mmap() to verify whether a process
* has the right to mmap a BO to their process space.
*/
static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
/*
* Don't verify access for KFD BOs. They don't have a GEM
* object associated with them.
*/
if (abo->kfd_bo)
return 0;
if (amdgpu_ttm_tt_get_usermm(bo->ttm))
return -EPERM;
return drm_vma_node_verify_access(&abo->gem_base.vma_node,
filp->private_data);
}
/**
* amdgpu_move_null - Register memory for a buffer object
*
* @bo: The bo to assign the memory to
* @new_mem: The memory to be assigned.
*
* Assign the memory from new_mem to the memory of the buffer object bo.
*/
static void amdgpu_move_null(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
BUG_ON(old_mem->mm_node != NULL);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
}
/**
* amdgpu_mm_node_addr - Compute the GPU relative offset of a GTT buffer.
*
* @bo: The bo to assign the memory to.
* @mm_node: Memory manager node for drm allocator.
* @mem: The region where the bo resides.
*
*/
static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
struct drm_mm_node *mm_node,
struct ttm_mem_reg *mem)
{
uint64_t addr = 0;
if (mem->mem_type != TTM_PL_TT || amdgpu_gtt_mgr_has_gart_addr(mem)) {
addr = mm_node->start << PAGE_SHIFT;
addr += bo->bdev->man[mem->mem_type].gpu_offset;
}
return addr;
}
/**
* amdgpu_find_mm_node - Helper function finds the drm_mm_node corresponding to
* @offset. It also modifies the offset to be within the drm_mm_node returned
*
* @mem: The region where the bo resides.
* @offset: The offset that drm_mm_node is used for finding.
*
*/
static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
unsigned long *offset)
{
struct drm_mm_node *mm_node = mem->mm_node;
while (*offset >= (mm_node->size << PAGE_SHIFT)) {
*offset -= (mm_node->size << PAGE_SHIFT);
++mm_node;
}
return mm_node;
}
/**
* amdgpu_copy_ttm_mem_to_mem - Helper function for copy
*
* The function copies @size bytes from {src->mem + src->offset} to
* {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
* move and different for a BO to BO copy.
*
* @f: Returns the last fence if multiple jobs are submitted.
*/
int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
struct amdgpu_copy_mem *src,
struct amdgpu_copy_mem *dst,
uint64_t size,
struct reservation_object *resv,
struct dma_fence **f)
{
struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
struct drm_mm_node *src_mm, *dst_mm;
uint64_t src_node_start, dst_node_start, src_node_size,
dst_node_size, src_page_offset, dst_page_offset;
struct dma_fence *fence = NULL;
int r = 0;
const uint64_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
AMDGPU_GPU_PAGE_SIZE);
if (!adev->mman.buffer_funcs_enabled) {
DRM_ERROR("Trying to move memory with ring turned off.\n");
return -EINVAL;
}
src_mm = amdgpu_find_mm_node(src->mem, &src->offset);
src_node_start = amdgpu_mm_node_addr(src->bo, src_mm, src->mem) +
src->offset;
src_node_size = (src_mm->size << PAGE_SHIFT) - src->offset;
src_page_offset = src_node_start & (PAGE_SIZE - 1);
dst_mm = amdgpu_find_mm_node(dst->mem, &dst->offset);
dst_node_start = amdgpu_mm_node_addr(dst->bo, dst_mm, dst->mem) +
dst->offset;
dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst->offset;
dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
mutex_lock(&adev->mman.gtt_window_lock);
while (size) {
unsigned long cur_size;
uint64_t from = src_node_start, to = dst_node_start;
struct dma_fence *next;
/* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
* begins at an offset, then adjust the size accordingly
*/
cur_size = min3(min(src_node_size, dst_node_size), size,
GTT_MAX_BYTES);
if (cur_size + src_page_offset > GTT_MAX_BYTES ||
cur_size + dst_page_offset > GTT_MAX_BYTES)
cur_size -= max(src_page_offset, dst_page_offset);
/* Map only what needs to be accessed. Map src to window 0 and
* dst to window 1
*/
if (src->mem->mem_type == TTM_PL_TT &&
!amdgpu_gtt_mgr_has_gart_addr(src->mem)) {
r = amdgpu_map_buffer(src->bo, src->mem,
PFN_UP(cur_size + src_page_offset),
src_node_start, 0, ring,
&from);
if (r)
goto error;
/* Adjust the offset because amdgpu_map_buffer returns
* start of mapped page
*/
from += src_page_offset;
}
if (dst->mem->mem_type == TTM_PL_TT &&
!amdgpu_gtt_mgr_has_gart_addr(dst->mem)) {
r = amdgpu_map_buffer(dst->bo, dst->mem,
PFN_UP(cur_size + dst_page_offset),
dst_node_start, 1, ring,
&to);
if (r)
goto error;
to += dst_page_offset;
}
r = amdgpu_copy_buffer(ring, from, to, cur_size,
resv, &next, false, true);
if (r)
goto error;
dma_fence_put(fence);
fence = next;
size -= cur_size;
if (!size)
break;
src_node_size -= cur_size;
if (!src_node_size) {
src_node_start = amdgpu_mm_node_addr(src->bo, ++src_mm,
src->mem);
src_node_size = (src_mm->size << PAGE_SHIFT);
} else {
src_node_start += cur_size;
src_page_offset = src_node_start & (PAGE_SIZE - 1);
}
dst_node_size -= cur_size;
if (!dst_node_size) {
dst_node_start = amdgpu_mm_node_addr(dst->bo, ++dst_mm,
dst->mem);
dst_node_size = (dst_mm->size << PAGE_SHIFT);
} else {
dst_node_start += cur_size;
dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
}
}
error:
mutex_unlock(&adev->mman.gtt_window_lock);
if (f)
*f = dma_fence_get(fence);
dma_fence_put(fence);
return r;
}
/**
* amdgpu_move_blit - Copy an entire buffer to another buffer
*
* This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to
* help move buffers to and from VRAM.
*/
static int amdgpu_move_blit(struct ttm_buffer_object *bo,
bool evict, bool no_wait_gpu,
struct ttm_mem_reg *new_mem,
struct ttm_mem_reg *old_mem)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct amdgpu_copy_mem src, dst;
struct dma_fence *fence = NULL;
int r;
src.bo = bo;
dst.bo = bo;
src.mem = old_mem;
dst.mem = new_mem;
src.offset = 0;
dst.offset = 0;
r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
new_mem->num_pages << PAGE_SHIFT,
bo->resv, &fence);
if (r)
goto error;
r = ttm_bo_pipeline_move(bo, fence, evict, new_mem);
dma_fence_put(fence);
return r;
error:
if (fence)
dma_fence_wait(fence, false);
dma_fence_put(fence);
return r;
}
/**
* amdgpu_move_vram_ram - Copy VRAM buffer to RAM buffer
*
* Called by amdgpu_bo_move().
*/
static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict,
struct ttm_operation_ctx *ctx,
struct ttm_mem_reg *new_mem)
{
struct amdgpu_device *adev;
struct ttm_mem_reg *old_mem = &bo->mem;
struct ttm_mem_reg tmp_mem;
struct ttm_place placements;
struct ttm_placement placement;
int r;
adev = amdgpu_ttm_adev(bo->bdev);
/* create space/pages for new_mem in GTT space */
tmp_mem = *new_mem;
tmp_mem.mm_node = NULL;
placement.num_placement = 1;
placement.placement = &placements;
placement.num_busy_placement = 1;
placement.busy_placement = &placements;
placements.fpfn = 0;
placements.lpfn = 0;
placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
if (unlikely(r)) {
return r;
}
/* set caching flags */
r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
if (unlikely(r)) {
goto out_cleanup;
}
/* Bind the memory to the GTT space */
r = ttm_tt_bind(bo->ttm, &tmp_mem, ctx);
if (unlikely(r)) {
goto out_cleanup;
}
/* blit VRAM to GTT */
r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu, &tmp_mem, old_mem);
if (unlikely(r)) {
goto out_cleanup;
}
/* move BO (in tmp_mem) to new_mem */
r = ttm_bo_move_ttm(bo, ctx, new_mem);
out_cleanup:
ttm_bo_mem_put(bo, &tmp_mem);
return r;
}
/**
* amdgpu_move_ram_vram - Copy buffer from RAM to VRAM
*
* Called by amdgpu_bo_move().
*/
static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict,
struct ttm_operation_ctx *ctx,
struct ttm_mem_reg *new_mem)
{
struct amdgpu_device *adev;
struct ttm_mem_reg *old_mem = &bo->mem;
struct ttm_mem_reg tmp_mem;
struct ttm_placement placement;
struct ttm_place placements;
int r;
adev = amdgpu_ttm_adev(bo->bdev);
/* make space in GTT for old_mem buffer */
tmp_mem = *new_mem;
tmp_mem.mm_node = NULL;
placement.num_placement = 1;
placement.placement = &placements;
placement.num_busy_placement = 1;
placement.busy_placement = &placements;
placements.fpfn = 0;
placements.lpfn = 0;
placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
if (unlikely(r)) {
return r;
}
/* move/bind old memory to GTT space */
r = ttm_bo_move_ttm(bo, ctx, &tmp_mem);
if (unlikely(r)) {
goto out_cleanup;
}
/* copy to VRAM */
r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu, new_mem, old_mem);
if (unlikely(r)) {
goto out_cleanup;
}
out_cleanup:
ttm_bo_mem_put(bo, &tmp_mem);
return r;
}
/**
* amdgpu_bo_move - Move a buffer object to a new memory location
*
* Called by ttm_bo_handle_move_mem()
*/
static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
struct ttm_operation_ctx *ctx,
struct ttm_mem_reg *new_mem)
{
struct amdgpu_device *adev;
struct amdgpu_bo *abo;
struct ttm_mem_reg *old_mem = &bo->mem;
int r;
/* Can't move a pinned BO */
abo = ttm_to_amdgpu_bo(bo);
if (WARN_ON_ONCE(abo->pin_count > 0))
return -EINVAL;
adev = amdgpu_ttm_adev(bo->bdev);
if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
amdgpu_move_null(bo, new_mem);
return 0;
}
if ((old_mem->mem_type == TTM_PL_TT &&
new_mem->mem_type == TTM_PL_SYSTEM) ||
(old_mem->mem_type == TTM_PL_SYSTEM &&
new_mem->mem_type == TTM_PL_TT)) {
/* bind is enough */
amdgpu_move_null(bo, new_mem);
return 0;
}
if (!adev->mman.buffer_funcs_enabled)
goto memcpy;
if (old_mem->mem_type == TTM_PL_VRAM &&
new_mem->mem_type == TTM_PL_SYSTEM) {
r = amdgpu_move_vram_ram(bo, evict, ctx, new_mem);
} else if (old_mem->mem_type == TTM_PL_SYSTEM &&
new_mem->mem_type == TTM_PL_VRAM) {
r = amdgpu_move_ram_vram(bo, evict, ctx, new_mem);
} else {
r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu,
new_mem, old_mem);
}
if (r) {
memcpy:
r = ttm_bo_move_memcpy(bo, ctx, new_mem);
if (r) {
return r;
}
}
if (bo->type == ttm_bo_type_device &&
new_mem->mem_type == TTM_PL_VRAM &&
old_mem->mem_type != TTM_PL_VRAM) {
/* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
* accesses the BO after it's moved.
*/
abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
}
/* update statistics */
atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved);
return 0;
}
/**
* amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
*
* Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
*/
static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
struct drm_mm_node *mm_node = mem->mm_node;
mem->bus.addr = NULL;
mem->bus.offset = 0;
mem->bus.size = mem->num_pages << PAGE_SHIFT;
mem->bus.base = 0;
mem->bus.is_iomem = false;
if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
return -EINVAL;
switch (mem->mem_type) {
case TTM_PL_SYSTEM:
/* system memory */
return 0;
case TTM_PL_TT:
break;
case TTM_PL_VRAM:
mem->bus.offset = mem->start << PAGE_SHIFT;
/* check if it's visible */
if ((mem->bus.offset + mem->bus.size) > adev->gmc.visible_vram_size)
return -EINVAL;
/* Only physically contiguous buffers apply. In a contiguous
* buffer, size of the first mm_node would match the number of
* pages in ttm_mem_reg.
*/
if (adev->mman.aper_base_kaddr &&
(mm_node->size == mem->num_pages))
mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
mem->bus.offset;
mem->bus.base = adev->gmc.aper_base;
mem->bus.is_iomem = true;
break;
default:
return -EINVAL;
}
return 0;
}
static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
}
static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
unsigned long page_offset)
{
struct drm_mm_node *mm;
unsigned long offset = (page_offset << PAGE_SHIFT);
mm = amdgpu_find_mm_node(&bo->mem, &offset);
return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start +
(offset >> PAGE_SHIFT);
}
/*
* TTM backend functions.
*/
struct amdgpu_ttm_gup_task_list {
struct list_head list;
struct task_struct *task;
};
struct amdgpu_ttm_tt {
struct ttm_dma_tt ttm;
u64 offset;
uint64_t userptr;
struct task_struct *usertask;
uint32_t userflags;
spinlock_t guptasklock;
struct list_head guptasks;
atomic_t mmu_invalidations;
uint32_t last_set_pages;
};
/**
* amdgpu_ttm_tt_get_user_pages - Pin pages of memory pointed to by a USERPTR
* pointer to memory
*
* Called by amdgpu_gem_userptr_ioctl() and amdgpu_cs_parser_bos().
* This provides a wrapper around the get_user_pages() call to provide
* device accessible pages that back user memory.
*/
int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
struct mm_struct *mm = gtt->usertask->mm;
unsigned int flags = 0;
unsigned pinned = 0;
int r;
if (!mm) /* Happens during process shutdown */
return -ESRCH;
if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
flags |= FOLL_WRITE;
down_read(&mm->mmap_sem);
if (gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) {
/*
* check that we only use anonymous memory to prevent problems
* with writeback
*/
unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
struct vm_area_struct *vma;
vma = find_vma(mm, gtt->userptr);
if (!vma || vma->vm_file || vma->vm_end < end) {
up_read(&mm->mmap_sem);
return -EPERM;
}
}
/* loop enough times using contiguous pages of memory */
do {
unsigned num_pages = ttm->num_pages - pinned;
uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
struct page **p = pages + pinned;
struct amdgpu_ttm_gup_task_list guptask;
guptask.task = current;
spin_lock(&gtt->guptasklock);
list_add(&guptask.list, &gtt->guptasks);
spin_unlock(&gtt->guptasklock);
if (mm == current->mm)
r = get_user_pages(userptr, num_pages, flags, p, NULL);
else
r = get_user_pages_remote(gtt->usertask,
mm, userptr, num_pages,
flags, p, NULL, NULL);
spin_lock(&gtt->guptasklock);
list_del(&guptask.list);
spin_unlock(&gtt->guptasklock);
if (r < 0)
goto release_pages;
pinned += r;
} while (pinned < ttm->num_pages);
up_read(&mm->mmap_sem);
return 0;
release_pages:
release_pages(pages, pinned);
up_read(&mm->mmap_sem);
return r;
}
/**
* amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
*
* Called by amdgpu_cs_list_validate(). This creates the page list
* that backs user memory and will ultimately be mapped into the device
* address space.
*/
void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
unsigned i;
gtt->last_set_pages = atomic_read(&gtt->mmu_invalidations);
for (i = 0; i < ttm->num_pages; ++i) {
if (ttm->pages[i])
put_page(ttm->pages[i]);
ttm->pages[i] = pages ? pages[i] : NULL;
}
}
/**
* amdgpu_ttm_tt_mark_user_page - Mark pages as dirty
*
* Called while unpinning userptr pages
*/
void amdgpu_ttm_tt_mark_user_pages(struct ttm_tt *ttm)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
unsigned i;
for (i = 0; i < ttm->num_pages; ++i) {
struct page *page = ttm->pages[i];
if (!page)
continue;
if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
set_page_dirty(page);
mark_page_accessed(page);
}
}
/**
* amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages
*
* Called by amdgpu_ttm_backend_bind()
**/
static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
unsigned nents;
int r;
int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
enum dma_data_direction direction = write ?
DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
/* Allocate an SG array and squash pages into it */
r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
ttm->num_pages << PAGE_SHIFT,
GFP_KERNEL);
if (r)
goto release_sg;
/* Map SG to device */
r = -ENOMEM;
nents = dma_map_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
if (nents != ttm->sg->nents)
goto release_sg;
/* convert SG to linear array of pages and dma addresses */
drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
gtt->ttm.dma_address, ttm->num_pages);
return 0;
release_sg:
kfree(ttm->sg);
ttm->sg = NULL;
return r;
}
/**
* amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
*/
static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
enum dma_data_direction direction = write ?
DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
/* double check that we don't free the table twice */
if (!ttm->sg || !ttm->sg->sgl)
return;
/* unmap the pages mapped to the device */
dma_unmap_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
/* mark the pages as dirty */
amdgpu_ttm_tt_mark_user_pages(ttm);
sg_free_table(ttm->sg);
}
int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
struct ttm_buffer_object *tbo,
uint64_t flags)
{
struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
struct ttm_tt *ttm = tbo->ttm;
struct amdgpu_ttm_tt *gtt = (void *)ttm;
int r;
if (abo->flags & AMDGPU_GEM_CREATE_MQD_GFX9) {
uint64_t page_idx = 1;
r = amdgpu_gart_bind(adev, gtt->offset, page_idx,
ttm->pages, gtt->ttm.dma_address, flags);
if (r)
goto gart_bind_fail;
/* Patch mtype of the second part BO */
flags &= ~AMDGPU_PTE_MTYPE_MASK;
flags |= AMDGPU_PTE_MTYPE(AMDGPU_MTYPE_NC);
r = amdgpu_gart_bind(adev,
gtt->offset + (page_idx << PAGE_SHIFT),
ttm->num_pages - page_idx,
&ttm->pages[page_idx],
&(gtt->ttm.dma_address[page_idx]), flags);
} else {
r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
ttm->pages, gtt->ttm.dma_address, flags);
}
gart_bind_fail:
if (r)
DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
ttm->num_pages, gtt->offset);
return r;
}
/**
* amdgpu_ttm_backend_bind - Bind GTT memory
*
* Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
* This handles binding GTT memory to the device address space.
*/
static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
struct ttm_mem_reg *bo_mem)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void*)ttm;
uint64_t flags;
int r = 0;
if (gtt->userptr) {
r = amdgpu_ttm_tt_pin_userptr(ttm);
if (r) {
DRM_ERROR("failed to pin userptr\n");
return r;
}
}
if (!ttm->num_pages) {
WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
ttm->num_pages, bo_mem, ttm);
}
if (bo_mem->mem_type == AMDGPU_PL_GDS ||
bo_mem->mem_type == AMDGPU_PL_GWS ||
bo_mem->mem_type == AMDGPU_PL_OA)
return -EINVAL;
if (!amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
gtt->offset = AMDGPU_BO_INVALID_OFFSET;
return 0;
}
/* compute PTE flags relevant to this BO memory */
flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
/* bind pages into GART page tables */
gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
ttm->pages, gtt->ttm.dma_address, flags);
if (r)
DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
ttm->num_pages, gtt->offset);
return r;
}
/**
* amdgpu_ttm_alloc_gart - Allocate GART memory for buffer object
*/
int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct ttm_operation_ctx ctx = { false, false };
struct amdgpu_ttm_tt *gtt = (void*)bo->ttm;
struct ttm_mem_reg tmp;
struct ttm_placement placement;
struct ttm_place placements;
uint64_t flags;
int r;
if (bo->mem.mem_type != TTM_PL_TT ||
amdgpu_gtt_mgr_has_gart_addr(&bo->mem))
return 0;
/* allocate GTT space */
tmp = bo->mem;
tmp.mm_node = NULL;
placement.num_placement = 1;
placement.placement = &placements;
placement.num_busy_placement = 1;
placement.busy_placement = &placements;
placements.fpfn = 0;
placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
placements.flags = (bo->mem.placement & ~TTM_PL_MASK_MEM) |
TTM_PL_FLAG_TT;
r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
if (unlikely(r))
return r;
/* compute PTE flags for this buffer object */
flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp);
/* Bind pages */
gtt->offset = (u64)tmp.start << PAGE_SHIFT;
r = amdgpu_ttm_gart_bind(adev, bo, flags);
if (unlikely(r)) {
ttm_bo_mem_put(bo, &tmp);
return r;
}
ttm_bo_mem_put(bo, &bo->mem);
bo->mem = tmp;
bo->offset = (bo->mem.start << PAGE_SHIFT) +
bo->bdev->man[bo->mem.mem_type].gpu_offset;
return 0;
}
/**
* amdgpu_ttm_recover_gart - Rebind GTT pages
*
* Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
* rebind GTT pages during a GPU reset.
*/
int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
uint64_t flags;
int r;
if (!tbo->ttm)
return 0;
flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, &tbo->mem);
r = amdgpu_ttm_gart_bind(adev, tbo, flags);
return r;
}
/**
* amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
*
* Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
* ttm_tt_destroy().
*/
static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
int r;
/* if the pages have userptr pinning then clear that first */
if (gtt->userptr)
amdgpu_ttm_tt_unpin_userptr(ttm);
if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
return 0;
/* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
r = amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
if (r)
DRM_ERROR("failed to unbind %lu pages at 0x%08llX\n",
gtt->ttm.ttm.num_pages, gtt->offset);
return r;
}
static void amdgpu_ttm_backend_destroy(struct ttm_tt *ttm)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
if (gtt->usertask)
put_task_struct(gtt->usertask);
ttm_dma_tt_fini(&gtt->ttm);
kfree(gtt);
}
static struct ttm_backend_func amdgpu_backend_func = {
.bind = &amdgpu_ttm_backend_bind,
.unbind = &amdgpu_ttm_backend_unbind,
.destroy = &amdgpu_ttm_backend_destroy,
};
/**
* amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
*
* @bo: The buffer object to create a GTT ttm_tt object around
*
* Called by ttm_tt_create().
*/
static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
uint32_t page_flags)
{
struct amdgpu_device *adev;
struct amdgpu_ttm_tt *gtt;
adev = amdgpu_ttm_adev(bo->bdev);
gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
if (gtt == NULL) {
return NULL;
}
gtt->ttm.ttm.func = &amdgpu_backend_func;
/* allocate space for the uninitialized page entries */
if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags)) {
kfree(gtt);
return NULL;
}
return &gtt->ttm.ttm;
}
/**
* amdgpu_ttm_tt_populate - Map GTT pages visible to the device
*
* Map the pages of a ttm_tt object to an address space visible
* to the underlying device.
*/
static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
struct ttm_operation_ctx *ctx)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
struct amdgpu_ttm_tt *gtt = (void *)ttm;
bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
/* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
if (gtt && gtt->userptr) {
ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
if (!ttm->sg)
return -ENOMEM;
ttm->page_flags |= TTM_PAGE_FLAG_SG;
ttm->state = tt_unbound;
return 0;
}
if (slave && ttm->sg) {
drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
gtt->ttm.dma_address,
ttm->num_pages);
ttm->state = tt_unbound;
return 0;
}
#ifdef CONFIG_SWIOTLB
if (adev->need_swiotlb && swiotlb_nr_tbl()) {
return ttm_dma_populate(&gtt->ttm, adev->dev, ctx);
}
#endif
/* fall back to generic helper to populate the page array
* and map them to the device */
return ttm_populate_and_map_pages(adev->dev, &gtt->ttm, ctx);
}
/**
* amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
*
* Unmaps pages of a ttm_tt object from the device address space and
* unpopulates the page array backing it.
*/
static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
struct amdgpu_device *adev;
struct amdgpu_ttm_tt *gtt = (void *)ttm;
bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
if (gtt && gtt->userptr) {
amdgpu_ttm_tt_set_user_pages(ttm, NULL);
kfree(ttm->sg);
ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
return;
}
if (slave)
return;
adev = amdgpu_ttm_adev(ttm->bdev);
#ifdef CONFIG_SWIOTLB
if (adev->need_swiotlb && swiotlb_nr_tbl()) {
ttm_dma_unpopulate(&gtt->ttm, adev->dev);
return;
}
#endif
/* fall back to generic helper to unmap and unpopulate array */
ttm_unmap_and_unpopulate_pages(adev->dev, &gtt->ttm);
}
/**
* amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
* task
*
* @ttm: The ttm_tt object to bind this userptr object to
* @addr: The address in the current tasks VM space to use
* @flags: Requirements of userptr object.
*
* Called by amdgpu_gem_userptr_ioctl() to bind userptr pages
* to current task
*/
int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
uint32_t flags)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
if (gtt == NULL)
return -EINVAL;
gtt->userptr = addr;
gtt->userflags = flags;
if (gtt->usertask)
put_task_struct(gtt->usertask);
gtt->usertask = current->group_leader;
get_task_struct(gtt->usertask);
spin_lock_init(&gtt->guptasklock);
INIT_LIST_HEAD(&gtt->guptasks);
atomic_set(&gtt->mmu_invalidations, 0);
gtt->last_set_pages = 0;
return 0;
}
/**
* amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
*/
struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
if (gtt == NULL)
return NULL;
if (gtt->usertask == NULL)
return NULL;
return gtt->usertask->mm;
}
/**
* amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
* address range for the current task.
*
*/
bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
unsigned long end)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
struct amdgpu_ttm_gup_task_list *entry;
unsigned long size;
if (gtt == NULL || !gtt->userptr)
return false;
/* Return false if no part of the ttm_tt object lies within
* the range
*/
size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
if (gtt->userptr > end || gtt->userptr + size <= start)
return false;
/* Search the lists of tasks that hold this mapping and see
* if current is one of them. If it is return false.
*/
spin_lock(&gtt->guptasklock);
list_for_each_entry(entry, &gtt->guptasks, list) {
if (entry->task == current) {
spin_unlock(&gtt->guptasklock);
return false;
}
}
spin_unlock(&gtt->guptasklock);
atomic_inc(&gtt->mmu_invalidations);
return true;
}
/**
* amdgpu_ttm_tt_userptr_invalidated - Has the ttm_tt object been invalidated?
*/
bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
int *last_invalidated)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
int prev_invalidated = *last_invalidated;
*last_invalidated = atomic_read(&gtt->mmu_invalidations);
return prev_invalidated != *last_invalidated;
}
/**
* amdgpu_ttm_tt_userptr_needs_pages - Have the pages backing this ttm_tt object
* been invalidated since the last time they've been set?
*/
bool amdgpu_ttm_tt_userptr_needs_pages(struct ttm_tt *ttm)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
if (gtt == NULL || !gtt->userptr)
return false;
return atomic_read(&gtt->mmu_invalidations) != gtt->last_set_pages;
}
/**
* amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
*/
bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
if (gtt == NULL)
return false;
return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
}
/**
* amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
*
* @ttm: The ttm_tt object to compute the flags for
* @mem: The memory registry backing this ttm_tt object
*/
uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
struct ttm_mem_reg *mem)
{
uint64_t flags = 0;
if (mem && mem->mem_type != TTM_PL_SYSTEM)
flags |= AMDGPU_PTE_VALID;
if (mem && mem->mem_type == TTM_PL_TT) {
flags |= AMDGPU_PTE_SYSTEM;
if (ttm->caching_state == tt_cached)
flags |= AMDGPU_PTE_SNOOPED;
}
flags |= adev->gart.gart_pte_flags;
flags |= AMDGPU_PTE_READABLE;
if (!amdgpu_ttm_tt_is_readonly(ttm))
flags |= AMDGPU_PTE_WRITEABLE;
return flags;
}
/**
* amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
* object.
*
* Return true if eviction is sensible. Called by ttm_mem_evict_first() on
* behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
* it can find space for a new object and by ttm_bo_force_list_clean() which is
* used to clean out a memory space.
*/
static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
const struct ttm_place *place)
{
unsigned long num_pages = bo->mem.num_pages;
struct drm_mm_node *node = bo->mem.mm_node;
struct reservation_object_list *flist;
struct dma_fence *f;
int i;
/* If bo is a KFD BO, check if the bo belongs to the current process.
* If true, then return false as any KFD process needs all its BOs to
* be resident to run successfully
*/
flist = reservation_object_get_list(bo->resv);
if (flist) {
for (i = 0; i < flist->shared_count; ++i) {
f = rcu_dereference_protected(flist->shared[i],
reservation_object_held(bo->resv));
if (amdkfd_fence_check_mm(f, current->mm))
return false;
}
}
switch (bo->mem.mem_type) {
case TTM_PL_TT:
return true;
case TTM_PL_VRAM:
/* Check each drm MM node individually */
while (num_pages) {
if (place->fpfn < (node->start + node->size) &&
!(place->lpfn && place->lpfn <= node->start))
return true;
num_pages -= node->size;
++node;
}
return false;
default:
break;
}
return ttm_bo_eviction_valuable(bo, place);
}
/**
* amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
*
* @bo: The buffer object to read/write
* @offset: Offset into buffer object
* @buf: Secondary buffer to write/read from
* @len: Length in bytes of access
* @write: true if writing
*
* This is used to access VRAM that backs a buffer object via MMIO
* access for debugging purposes.
*/
static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
unsigned long offset,
void *buf, int len, int write)
{
struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
struct drm_mm_node *nodes;
uint32_t value = 0;
int ret = 0;
uint64_t pos;
unsigned long flags;
if (bo->mem.mem_type != TTM_PL_VRAM)
return -EIO;
nodes = amdgpu_find_mm_node(&abo->tbo.mem, &offset);
pos = (nodes->start << PAGE_SHIFT) + offset;
while (len && pos < adev->gmc.mc_vram_size) {
uint64_t aligned_pos = pos & ~(uint64_t)3;
uint32_t bytes = 4 - (pos & 3);
uint32_t shift = (pos & 3) * 8;
uint32_t mask = 0xffffffff << shift;
if (len < bytes) {
mask &= 0xffffffff >> (bytes - len) * 8;
bytes = len;
}
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000);
WREG32_NO_KIQ(mmMM_INDEX_HI, aligned_pos >> 31);
if (!write || mask != 0xffffffff)
value = RREG32_NO_KIQ(mmMM_DATA);
if (write) {
value &= ~mask;
value |= (*(uint32_t *)buf << shift) & mask;
WREG32_NO_KIQ(mmMM_DATA, value);
}
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
if (!write) {
value = (value & mask) >> shift;
memcpy(buf, &value, bytes);
}
ret += bytes;
buf = (uint8_t *)buf + bytes;
pos += bytes;
len -= bytes;
if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) {
++nodes;
pos = (nodes->start << PAGE_SHIFT);
}
}
return ret;
}
static struct ttm_bo_driver amdgpu_bo_driver = {
.ttm_tt_create = &amdgpu_ttm_tt_create,
.ttm_tt_populate = &amdgpu_ttm_tt_populate,
.ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
.invalidate_caches = &amdgpu_invalidate_caches,
.init_mem_type = &amdgpu_init_mem_type,
.eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
.evict_flags = &amdgpu_evict_flags,
.move = &amdgpu_bo_move,
.verify_access = &amdgpu_verify_access,
.move_notify = &amdgpu_bo_move_notify,
.fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
.io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
.io_mem_free = &amdgpu_ttm_io_mem_free,
.io_mem_pfn = amdgpu_ttm_io_mem_pfn,
.access_memory = &amdgpu_ttm_access_memory
};
/*
* Firmware Reservation functions
*/
/**
* amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
*
* @adev: amdgpu_device pointer
*
* free fw reserved vram if it has been reserved.
*/
static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
{
amdgpu_bo_free_kernel(&adev->fw_vram_usage.reserved_bo,
NULL, &adev->fw_vram_usage.va);
}
/**
* amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
*
* @adev: amdgpu_device pointer
*
* create bo vram reservation from fw.
*/
static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
{
struct ttm_operation_ctx ctx = { false, false };
struct amdgpu_bo_param bp;
int r = 0;
int i;
u64 vram_size = adev->gmc.visible_vram_size;
u64 offset = adev->fw_vram_usage.start_offset;
u64 size = adev->fw_vram_usage.size;
struct amdgpu_bo *bo;
memset(&bp, 0, sizeof(bp));
bp.size = adev->fw_vram_usage.size;
bp.byte_align = PAGE_SIZE;
bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
bp.flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
bp.type = ttm_bo_type_kernel;
bp.resv = NULL;
adev->fw_vram_usage.va = NULL;
adev->fw_vram_usage.reserved_bo = NULL;
if (adev->fw_vram_usage.size > 0 &&
adev->fw_vram_usage.size <= vram_size) {
r = amdgpu_bo_create(adev, &bp,
&adev->fw_vram_usage.reserved_bo);
if (r)
goto error_create;
r = amdgpu_bo_reserve(adev->fw_vram_usage.reserved_bo, false);
if (r)
goto error_reserve;
/* remove the original mem node and create a new one at the
* request position
*/
bo = adev->fw_vram_usage.reserved_bo;
offset = ALIGN(offset, PAGE_SIZE);
for (i = 0; i < bo->placement.num_placement; ++i) {
bo->placements[i].fpfn = offset >> PAGE_SHIFT;
bo->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
}
ttm_bo_mem_put(&bo->tbo, &bo->tbo.mem);
r = ttm_bo_mem_space(&bo->tbo, &bo->placement,
&bo->tbo.mem, &ctx);
if (r)
goto error_pin;
r = amdgpu_bo_pin_restricted(adev->fw_vram_usage.reserved_bo,
AMDGPU_GEM_DOMAIN_VRAM,
adev->fw_vram_usage.start_offset,
(adev->fw_vram_usage.start_offset +
adev->fw_vram_usage.size));
if (r)
goto error_pin;
r = amdgpu_bo_kmap(adev->fw_vram_usage.reserved_bo,
&adev->fw_vram_usage.va);
if (r)
goto error_kmap;
amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
}
return r;
error_kmap:
amdgpu_bo_unpin(adev->fw_vram_usage.reserved_bo);
error_pin:
amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
error_reserve:
amdgpu_bo_unref(&adev->fw_vram_usage.reserved_bo);
error_create:
adev->fw_vram_usage.va = NULL;
adev->fw_vram_usage.reserved_bo = NULL;
return r;
}
/**
* amdgpu_ttm_init - Init the memory management (ttm) as well as various
* gtt/vram related fields.
*
* This initializes all of the memory space pools that the TTM layer
* will need such as the GTT space (system memory mapped to the device),
* VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
* can be mapped per VMID.
*/
int amdgpu_ttm_init(struct amdgpu_device *adev)
{
uint64_t gtt_size;
int r;
u64 vis_vram_limit;
/* initialize global references for vram/gtt */
r = amdgpu_ttm_global_init(adev);
if (r) {
return r;
}
/* No others user of address space so set it to 0 */
r = ttm_bo_device_init(&adev->mman.bdev,
adev->mman.bo_global_ref.ref.object,
&amdgpu_bo_driver,
adev->ddev->anon_inode->i_mapping,
DRM_FILE_PAGE_OFFSET,
adev->need_dma32);
if (r) {
DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
return r;
}
adev->mman.initialized = true;
/* We opt to avoid OOM on system pages allocations */
adev->mman.bdev.no_retry = true;
/* Initialize VRAM pool with all of VRAM divided into pages */
r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_VRAM,
adev->gmc.real_vram_size >> PAGE_SHIFT);
if (r) {
DRM_ERROR("Failed initializing VRAM heap.\n");
return r;
}
/* Reduce size of CPU-visible VRAM if requested */
vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
if (amdgpu_vis_vram_limit > 0 &&
vis_vram_limit <= adev->gmc.visible_vram_size)
adev->gmc.visible_vram_size = vis_vram_limit;
/* Change the size here instead of the init above so only lpfn is affected */
amdgpu_ttm_set_buffer_funcs_status(adev, false);
#ifdef CONFIG_64BIT
adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
adev->gmc.visible_vram_size);
#endif
/*
*The reserved vram for firmware must be pinned to the specified
*place on the VRAM, so reserve it early.
*/
r = amdgpu_ttm_fw_reserve_vram_init(adev);
if (r) {
return r;
}
/* allocate memory as required for VGA
* This is used for VGA emulation and pre-OS scanout buffers to
* avoid display artifacts while transitioning between pre-OS
* and driver. */
if (adev->gmc.stolen_size) {
r = amdgpu_bo_create_kernel(adev, adev->gmc.stolen_size, PAGE_SIZE,
AMDGPU_GEM_DOMAIN_VRAM,
&adev->stolen_vga_memory,
NULL, NULL);
if (r)
return r;
}
DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
(unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
/* Compute GTT size, either bsaed on 3/4th the size of RAM size
* or whatever the user passed on module init */
if (amdgpu_gtt_size == -1) {
struct sysinfo si;
si_meminfo(&si);
gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
adev->gmc.mc_vram_size),
((uint64_t)si.totalram * si.mem_unit * 3/4));
}
else
gtt_size = (uint64_t)amdgpu_gtt_size << 20;
/* Initialize GTT memory pool */
r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);
if (r) {
DRM_ERROR("Failed initializing GTT heap.\n");
return r;
}
DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
(unsigned)(gtt_size / (1024 * 1024)));
/* Initialize various on-chip memory pools */
adev->gds.mem.total_size = adev->gds.mem.total_size << AMDGPU_GDS_SHIFT;
adev->gds.mem.gfx_partition_size = adev->gds.mem.gfx_partition_size << AMDGPU_GDS_SHIFT;
adev->gds.mem.cs_partition_size = adev->gds.mem.cs_partition_size << AMDGPU_GDS_SHIFT;
adev->gds.gws.total_size = adev->gds.gws.total_size << AMDGPU_GWS_SHIFT;
adev->gds.gws.gfx_partition_size = adev->gds.gws.gfx_partition_size << AMDGPU_GWS_SHIFT;
adev->gds.gws.cs_partition_size = adev->gds.gws.cs_partition_size << AMDGPU_GWS_SHIFT;
adev->gds.oa.total_size = adev->gds.oa.total_size << AMDGPU_OA_SHIFT;
adev->gds.oa.gfx_partition_size = adev->gds.oa.gfx_partition_size << AMDGPU_OA_SHIFT;
adev->gds.oa.cs_partition_size = adev->gds.oa.cs_partition_size << AMDGPU_OA_SHIFT;
/* GDS Memory */
if (adev->gds.mem.total_size) {
r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GDS,
adev->gds.mem.total_size >> PAGE_SHIFT);
if (r) {
DRM_ERROR("Failed initializing GDS heap.\n");
return r;
}
}
/* GWS */
if (adev->gds.gws.total_size) {
r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GWS,
adev->gds.gws.total_size >> PAGE_SHIFT);
if (r) {
DRM_ERROR("Failed initializing gws heap.\n");
return r;
}
}
/* OA */
if (adev->gds.oa.total_size) {
r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_OA,
adev->gds.oa.total_size >> PAGE_SHIFT);
if (r) {
DRM_ERROR("Failed initializing oa heap.\n");
return r;
}
}
/* Register debugfs entries for amdgpu_ttm */
r = amdgpu_ttm_debugfs_init(adev);
if (r) {
DRM_ERROR("Failed to init debugfs\n");
return r;
}
return 0;
}
/**
* amdgpu_ttm_late_init - Handle any late initialization for amdgpu_ttm
*/
void amdgpu_ttm_late_init(struct amdgpu_device *adev)
{
/* return the VGA stolen memory (if any) back to VRAM */
amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
}
/**
* amdgpu_ttm_fini - De-initialize the TTM memory pools
*/
void amdgpu_ttm_fini(struct amdgpu_device *adev)
{
if (!adev->mman.initialized)
return;
amdgpu_ttm_debugfs_fini(adev);
amdgpu_ttm_fw_reserve_vram_fini(adev);
if (adev->mman.aper_base_kaddr)
iounmap(adev->mman.aper_base_kaddr);
adev->mman.aper_base_kaddr = NULL;
ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_VRAM);
ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_TT);
if (adev->gds.mem.total_size)
ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GDS);
if (adev->gds.gws.total_size)
ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GWS);
if (adev->gds.oa.total_size)
ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_OA);
ttm_bo_device_release(&adev->mman.bdev);
amdgpu_ttm_global_fini(adev);
adev->mman.initialized = false;
DRM_INFO("amdgpu: ttm finalized\n");
}
/**
* amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
*
* @adev: amdgpu_device pointer
* @enable: true when we can use buffer functions.
*
* Enable/disable use of buffer functions during suspend/resume. This should
* only be called at bootup or when userspace isn't running.
*/
void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
{
struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_VRAM];
uint64_t size;
int r;
if (!adev->mman.initialized || adev->in_gpu_reset ||
adev->mman.buffer_funcs_enabled == enable)
return;
if (enable) {
struct amdgpu_ring *ring;
struct drm_sched_rq *rq;
ring = adev->mman.buffer_funcs_ring;
rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL];
r = drm_sched_entity_init(&adev->mman.entity, &rq, 1, NULL);
if (r) {
DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
r);
return;
}
} else {
drm_sched_entity_destroy(&adev->mman.entity);
dma_fence_put(man->move);
man->move = NULL;
}
/* this just adjusts TTM size idea, which sets lpfn to the correct value */
if (enable)
size = adev->gmc.real_vram_size;
else
size = adev->gmc.visible_vram_size;
man->size = size >> PAGE_SHIFT;
adev->mman.buffer_funcs_enabled = enable;
}
int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct amdgpu_device *adev;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return -EINVAL;
file_priv = filp->private_data;
adev = file_priv->minor->dev->dev_private;
if (adev == NULL)
return -EINVAL;
return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
}
static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem, unsigned num_pages,
uint64_t offset, unsigned window,
struct amdgpu_ring *ring,
uint64_t *addr)
{
struct amdgpu_ttm_tt *gtt = (void *)bo->ttm;
struct amdgpu_device *adev = ring->adev;
struct ttm_tt *ttm = bo->ttm;
struct amdgpu_job *job;
unsigned num_dw, num_bytes;
dma_addr_t *dma_address;
struct dma_fence *fence;
uint64_t src_addr, dst_addr;
uint64_t flags;
int r;
BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
*addr = adev->gmc.gart_start;
*addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
AMDGPU_GPU_PAGE_SIZE;
num_dw = adev->mman.buffer_funcs->copy_num_dw;
while (num_dw & 0x7)
num_dw++;
num_bytes = num_pages * 8;
r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job);
if (r)
return r;
src_addr = num_dw * 4;
src_addr += job->ibs[0].gpu_addr;
dst_addr = adev->gart.table_addr;
dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
dst_addr, num_bytes);
amdgpu_ring_pad_ib(ring, &job->ibs[0]);
WARN_ON(job->ibs[0].length_dw > num_dw);
dma_address = &gtt->ttm.dma_address[offset >> PAGE_SHIFT];
flags = amdgpu_ttm_tt_pte_flags(adev, ttm, mem);
r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
&job->ibs[0].ptr[num_dw]);
if (r)
goto error_free;
r = amdgpu_job_submit(job, &adev->mman.entity,
AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
if (r)
goto error_free;
dma_fence_put(fence);
return r;
error_free:
amdgpu_job_free(job);
return r;
}
int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
uint64_t dst_offset, uint32_t byte_count,
struct reservation_object *resv,
struct dma_fence **fence, bool direct_submit,
bool vm_needs_flush)
{
struct amdgpu_device *adev = ring->adev;
struct amdgpu_job *job;
uint32_t max_bytes;
unsigned num_loops, num_dw;
unsigned i;
int r;
if (direct_submit && !ring->ready) {
DRM_ERROR("Trying to move memory with ring turned off.\n");
return -EINVAL;
}
max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
num_loops = DIV_ROUND_UP(byte_count, max_bytes);
num_dw = num_loops * adev->mman.buffer_funcs->copy_num_dw;
/* for IB padding */
while (num_dw & 0x7)
num_dw++;
r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
if (r)
return r;
job->vm_needs_flush = vm_needs_flush;
if (resv) {
r = amdgpu_sync_resv(adev, &job->sync, resv,
AMDGPU_FENCE_OWNER_UNDEFINED,
false);
if (r) {
DRM_ERROR("sync failed (%d).\n", r);
goto error_free;
}
}
for (i = 0; i < num_loops; i++) {
uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
dst_offset, cur_size_in_bytes);
src_offset += cur_size_in_bytes;
dst_offset += cur_size_in_bytes;
byte_count -= cur_size_in_bytes;
}
amdgpu_ring_pad_ib(ring, &job->ibs[0]);
WARN_ON(job->ibs[0].length_dw > num_dw);
if (direct_submit)
r = amdgpu_job_submit_direct(job, ring, fence);
else
r = amdgpu_job_submit(job, &adev->mman.entity,
AMDGPU_FENCE_OWNER_UNDEFINED, fence);
if (r)
goto error_free;
return r;
error_free:
amdgpu_job_free(job);
DRM_ERROR("Error scheduling IBs (%d)\n", r);
return r;
}
int amdgpu_fill_buffer(struct amdgpu_bo *bo,
uint32_t src_data,
struct reservation_object *resv,
struct dma_fence **fence)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
struct drm_mm_node *mm_node;
unsigned long num_pages;
unsigned int num_loops, num_dw;
struct amdgpu_job *job;
int r;
if (!adev->mman.buffer_funcs_enabled) {
DRM_ERROR("Trying to clear memory with ring turned off.\n");
return -EINVAL;
}
if (bo->tbo.mem.mem_type == TTM_PL_TT) {
r = amdgpu_ttm_alloc_gart(&bo->tbo);
if (r)
return r;
}
num_pages = bo->tbo.num_pages;
mm_node = bo->tbo.mem.mm_node;
num_loops = 0;
while (num_pages) {
uint32_t byte_count = mm_node->size << PAGE_SHIFT;
num_loops += DIV_ROUND_UP(byte_count, max_bytes);
num_pages -= mm_node->size;
++mm_node;
}
num_dw = num_loops * adev->mman.buffer_funcs->fill_num_dw;
/* for IB padding */
num_dw += 64;
r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
if (r)
return r;
if (resv) {
r = amdgpu_sync_resv(adev, &job->sync, resv,
AMDGPU_FENCE_OWNER_UNDEFINED, false);
if (r) {
DRM_ERROR("sync failed (%d).\n", r);
goto error_free;
}
}
num_pages = bo->tbo.num_pages;
mm_node = bo->tbo.mem.mm_node;
while (num_pages) {
uint32_t byte_count = mm_node->size << PAGE_SHIFT;
uint64_t dst_addr;
dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem);
while (byte_count) {
uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data,
dst_addr, cur_size_in_bytes);
dst_addr += cur_size_in_bytes;
byte_count -= cur_size_in_bytes;
}
num_pages -= mm_node->size;
++mm_node;
}
amdgpu_ring_pad_ib(ring, &job->ibs[0]);
WARN_ON(job->ibs[0].length_dw > num_dw);
r = amdgpu_job_submit(job, &adev->mman.entity,
AMDGPU_FENCE_OWNER_UNDEFINED, fence);
if (r)
goto error_free;
return 0;
error_free:
amdgpu_job_free(job);
return r;
}
#if defined(CONFIG_DEBUG_FS)
static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
unsigned ttm_pl = *(int *)node->info_ent->data;
struct drm_device *dev = node->minor->dev;
struct amdgpu_device *adev = dev->dev_private;
struct ttm_mem_type_manager *man = &adev->mman.bdev.man[ttm_pl];
struct drm_printer p = drm_seq_file_printer(m);
man->func->debug(man, &p);
return 0;
}
static int ttm_pl_vram = TTM_PL_VRAM;
static int ttm_pl_tt = TTM_PL_TT;
static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
{"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, &ttm_pl_vram},
{"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, &ttm_pl_tt},
{"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
#ifdef CONFIG_SWIOTLB
{"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
#endif
};
/**
* amdgpu_ttm_vram_read - Linear read access to VRAM
*
* Accesses VRAM via MMIO for debugging purposes.
*/
static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = file_inode(f)->i_private;
ssize_t result = 0;
int r;
if (size & 0x3 || *pos & 0x3)
return -EINVAL;
if (*pos >= adev->gmc.mc_vram_size)
return -ENXIO;
while (size) {
unsigned long flags;
uint32_t value;
if (*pos >= adev->gmc.mc_vram_size)
return result;
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
value = RREG32_NO_KIQ(mmMM_DATA);
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
r = put_user(value, (uint32_t *)buf);
if (r)
return r;
result += 4;
buf += 4;
*pos += 4;
size -= 4;
}
return result;
}
/**
* amdgpu_ttm_vram_write - Linear write access to VRAM
*
* Accesses VRAM via MMIO for debugging purposes.
*/
static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = file_inode(f)->i_private;
ssize_t result = 0;
int r;
if (size & 0x3 || *pos & 0x3)
return -EINVAL;
if (*pos >= adev->gmc.mc_vram_size)
return -ENXIO;
while (size) {
unsigned long flags;
uint32_t value;
if (*pos >= adev->gmc.mc_vram_size)
return result;
r = get_user(value, (uint32_t *)buf);
if (r)
return r;
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
WREG32_NO_KIQ(mmMM_DATA, value);
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
result += 4;
buf += 4;
*pos += 4;
size -= 4;
}
return result;
}
static const struct file_operations amdgpu_ttm_vram_fops = {
.owner = THIS_MODULE,
.read = amdgpu_ttm_vram_read,
.write = amdgpu_ttm_vram_write,
.llseek = default_llseek,
};
#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
/**
* amdgpu_ttm_gtt_read - Linear read access to GTT memory
*/
static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = file_inode(f)->i_private;
ssize_t result = 0;
int r;
while (size) {
loff_t p = *pos / PAGE_SIZE;
unsigned off = *pos & ~PAGE_MASK;
size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
struct page *page;
void *ptr;
if (p >= adev->gart.num_cpu_pages)
return result;
page = adev->gart.pages[p];
if (page) {
ptr = kmap(page);
ptr += off;
r = copy_to_user(buf, ptr, cur_size);
kunmap(adev->gart.pages[p]);
} else
r = clear_user(buf, cur_size);
if (r)
return -EFAULT;
result += cur_size;
buf += cur_size;
*pos += cur_size;
size -= cur_size;
}
return result;
}
static const struct file_operations amdgpu_ttm_gtt_fops = {
.owner = THIS_MODULE,
.read = amdgpu_ttm_gtt_read,
.llseek = default_llseek
};
#endif
/**
* amdgpu_iomem_read - Virtual read access to GPU mapped memory
*
* This function is used to read memory that has been mapped to the
* GPU and the known addresses are not physical addresses but instead
* bus addresses (e.g., what you'd put in an IB or ring buffer).
*/
static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = file_inode(f)->i_private;
struct iommu_domain *dom;
ssize_t result = 0;
int r;
/* retrieve the IOMMU domain if any for this device */
dom = iommu_get_domain_for_dev(adev->dev);
while (size) {
phys_addr_t addr = *pos & PAGE_MASK;
loff_t off = *pos & ~PAGE_MASK;
size_t bytes = PAGE_SIZE - off;
unsigned long pfn;
struct page *p;
void *ptr;
bytes = bytes < size ? bytes : size;
/* Translate the bus address to a physical address. If
* the domain is NULL it means there is no IOMMU active
* and the address translation is the identity
*/
addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
pfn = addr >> PAGE_SHIFT;
if (!pfn_valid(pfn))
return -EPERM;
p = pfn_to_page(pfn);
if (p->mapping != adev->mman.bdev.dev_mapping)
return -EPERM;
ptr = kmap(p);
r = copy_to_user(buf, ptr + off, bytes);
kunmap(p);
if (r)
return -EFAULT;
size -= bytes;
*pos += bytes;
result += bytes;
}
return result;
}
/**
* amdgpu_iomem_write - Virtual write access to GPU mapped memory
*
* This function is used to write memory that has been mapped to the
* GPU and the known addresses are not physical addresses but instead
* bus addresses (e.g., what you'd put in an IB or ring buffer).
*/
static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = file_inode(f)->i_private;
struct iommu_domain *dom;
ssize_t result = 0;
int r;
dom = iommu_get_domain_for_dev(adev->dev);
while (size) {
phys_addr_t addr = *pos & PAGE_MASK;
loff_t off = *pos & ~PAGE_MASK;
size_t bytes = PAGE_SIZE - off;
unsigned long pfn;
struct page *p;
void *ptr;
bytes = bytes < size ? bytes : size;
addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
pfn = addr >> PAGE_SHIFT;
if (!pfn_valid(pfn))
return -EPERM;
p = pfn_to_page(pfn);
if (p->mapping != adev->mman.bdev.dev_mapping)
return -EPERM;
ptr = kmap(p);
r = copy_from_user(ptr + off, buf, bytes);
kunmap(p);
if (r)
return -EFAULT;
size -= bytes;
*pos += bytes;
result += bytes;
}
return result;
}
static const struct file_operations amdgpu_ttm_iomem_fops = {
.owner = THIS_MODULE,
.read = amdgpu_iomem_read,
.write = amdgpu_iomem_write,
.llseek = default_llseek
};
static const struct {
char *name;
const struct file_operations *fops;
int domain;
} ttm_debugfs_entries[] = {
{ "amdgpu_vram", &amdgpu_ttm_vram_fops, TTM_PL_VRAM },
#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
{ "amdgpu_gtt", &amdgpu_ttm_gtt_fops, TTM_PL_TT },
#endif
{ "amdgpu_iomem", &amdgpu_ttm_iomem_fops, TTM_PL_SYSTEM },
};
#endif
static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)
unsigned count;
struct drm_minor *minor = adev->ddev->primary;
struct dentry *ent, *root = minor->debugfs_root;
for (count = 0; count < ARRAY_SIZE(ttm_debugfs_entries); count++) {
ent = debugfs_create_file(
ttm_debugfs_entries[count].name,
S_IFREG | S_IRUGO, root,
adev,
ttm_debugfs_entries[count].fops);
if (IS_ERR(ent))
return PTR_ERR(ent);
if (ttm_debugfs_entries[count].domain == TTM_PL_VRAM)
i_size_write(ent->d_inode, adev->gmc.mc_vram_size);
else if (ttm_debugfs_entries[count].domain == TTM_PL_TT)
i_size_write(ent->d_inode, adev->gmc.gart_size);
adev->mman.debugfs_entries[count] = ent;
}
count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
#ifdef CONFIG_SWIOTLB
if (!(adev->need_swiotlb && swiotlb_nr_tbl()))
--count;
#endif
return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count);
#else
return 0;
#endif
}
static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)
unsigned i;
for (i = 0; i < ARRAY_SIZE(ttm_debugfs_entries); i++)
debugfs_remove(adev->mman.debugfs_entries[i]);
#endif
}
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