// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include "xe_sa.h"
#include <linux/kernel.h>
#include <drm/drm_managed.h>
#include "xe_bo.h"
#include "xe_device.h"
#include "xe_map.h"
static void xe_sa_bo_manager_fini(struct drm_device *drm, void *arg)
{
struct xe_sa_manager *sa_manager = arg;
struct xe_bo *bo = sa_manager->bo;
if (!bo) {
drm_err(drm, "no bo for sa manager\n" );
return ;
}
drm_suballoc_manager_fini(&sa_manager->base);
if (sa_manager->is_iomem)
kvfree(sa_manager->cpu_ptr);
sa_manager->bo = NULL;
}
/**
* _ _ xe_sa_bo_manager_init ( ) - Create and initialize the suballocator
* @ tile : the & xe_tile where allocate
* @ size : number of bytes to allocate
* @ guard : number of bytes to exclude from suballocations
* @ align : alignment for each suballocated chunk
*
* Prepares the suballocation manager for suballocations .
*
* Return : a pointer to the & xe_sa_manager or an ERR_PTR on failure .
*/
struct xe_sa_manager *__xe_sa_bo_manager_init(struct xe_tile *tile, u32 size, u32 guard, u32 align)
{
struct xe_device *xe = tile_to_xe(tile);
struct xe_sa_manager *sa_manager;
u32 managed_size;
struct xe_bo *bo;
int ret;
xe_tile_assert(tile, size > guard);
managed_size = size - guard;
sa_manager = drmm_kzalloc(&xe->drm, sizeof (*sa_manager), GFP_KERNEL);
if (!sa_manager)
return ERR_PTR(-ENOMEM);
bo = xe_managed_bo_create_pin_map(xe, tile, size,
XE_BO_FLAG_VRAM_IF_DGFX(tile) |
XE_BO_FLAG_GGTT |
XE_BO_FLAG_GGTT_INVALIDATE |
XE_BO_FLAG_PINNED_NORESTORE);
if (IS_ERR(bo)) {
drm_err(&xe->drm, "Failed to prepare %uKiB BO for SA manager (%pe)\n" ,
size / SZ_1K, bo);
return ERR_CAST(bo);
}
sa_manager->bo = bo;
sa_manager->is_iomem = bo->vmap.is_iomem;
sa_manager->gpu_addr = xe_bo_ggtt_addr(bo);
if (bo->vmap.is_iomem) {
sa_manager->cpu_ptr = kvzalloc(managed_size, GFP_KERNEL);
if (!sa_manager->cpu_ptr)
return ERR_PTR(-ENOMEM);
} else {
sa_manager->cpu_ptr = bo->vmap.vaddr;
memset(sa_manager->cpu_ptr, 0 , bo->ttm.base.size);
}
drm_suballoc_manager_init(&sa_manager->base, managed_size, align);
ret = drmm_add_action_or_reset(&xe->drm, xe_sa_bo_manager_fini,
sa_manager);
if (ret)
return ERR_PTR(ret);
return sa_manager;
}
/**
* _ _ xe_sa_bo_new ( ) - Make a suballocation but use custom gfp flags .
* @ sa_manager : the & xe_sa_manager
* @ size : number of bytes we want to suballocate
* @ gfp : gfp flags used for memory allocation . Typically GFP_KERNEL .
*
* Try to make a suballocation of size @ size .
*
* Return : a & drm_suballoc , or an ERR_PTR .
*/
struct drm_suballoc *__xe_sa_bo_new(struct xe_sa_manager *sa_manager, u32 size, gfp_t gfp)
{
/*
* BB to large , return - ENOBUFS indicating user should split
* array of binds into smaller chunks .
*/
if (size > sa_manager->base.size)
return ERR_PTR(-ENOBUFS);
return drm_suballoc_new(&sa_manager->base, size, gfp, true , 0 );
}
void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
{
struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
struct xe_device *xe = tile_to_xe(sa_manager->bo->tile);
if (!sa_manager->bo->vmap.is_iomem)
return ;
xe_map_memcpy_to(xe, &sa_manager->bo->vmap, drm_suballoc_soffset(sa_bo),
xe_sa_bo_cpu_addr(sa_bo),
drm_suballoc_size(sa_bo));
}
void xe_sa_bo_free(struct drm_suballoc *sa_bo,
struct dma_fence *fence)
{
drm_suballoc_free(sa_bo, fence);
}
Messung V0.5 in Prozent C=97 H=100 G=98
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-12)
¤
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