1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2022 Intel Corporation
  4 */
  5
  6#include "xe_sa.h"
  7
  8#include <linux/kernel.h>
  9
 10#include <drm/drm_managed.h>
 11
 12#include "xe_bo.h"
 13#include "xe_device.h"
 14#include "xe_map.h"
 15
 16static void xe_sa_bo_manager_fini(struct drm_device *drm, void *arg)
 17{
 18	struct xe_sa_manager *sa_manager = arg;
 19	struct xe_bo *bo = sa_manager->bo;
 20
 21	if (!bo) {
 22		drm_err(drm, "no bo for sa manager\n");
 23		return;
 24	}
 25
 26	drm_suballoc_manager_fini(&sa_manager->base);
 27
 28	if (bo->vmap.is_iomem)
 29		kvfree(sa_manager->cpu_ptr);
 30
 31	xe_bo_unpin_map_no_vm(bo);
 32	sa_manager->bo = NULL;
 33}
 34
 35struct xe_sa_manager *xe_sa_bo_manager_init(struct xe_tile *tile, u32 size, u32 align)
 36{
 37	struct xe_device *xe = tile_to_xe(tile);
 38	u32 managed_size = size - SZ_4K;
 39	struct xe_bo *bo;
 40	int ret;
 41
 42	struct xe_sa_manager *sa_manager = drmm_kzalloc(&tile_to_xe(tile)->drm,
 43							sizeof(*sa_manager),
 44							GFP_KERNEL);
 45	if (!sa_manager)
 46		return ERR_PTR(-ENOMEM);
 47
 48	sa_manager->bo = NULL;
 49
 50	bo = xe_bo_create_pin_map(xe, tile, NULL, size, ttm_bo_type_kernel,
 51				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
 52				  XE_BO_CREATE_GGTT_BIT);
 53	if (IS_ERR(bo)) {
 54		drm_err(&xe->drm, "failed to allocate bo for sa manager: %ld\n",
 55			PTR_ERR(bo));
 56		return (struct xe_sa_manager *)bo;
 57	}
 58	sa_manager->bo = bo;
 59
 60	drm_suballoc_manager_init(&sa_manager->base, managed_size, align);
 61	sa_manager->gpu_addr = xe_bo_ggtt_addr(bo);
 62
 63	if (bo->vmap.is_iomem) {
 64		sa_manager->cpu_ptr = kvzalloc(managed_size, GFP_KERNEL);
 65		if (!sa_manager->cpu_ptr) {
 66			xe_bo_unpin_map_no_vm(sa_manager->bo);
 67			sa_manager->bo = NULL;
 68			return ERR_PTR(-ENOMEM);
 69		}
 70	} else {
 71		sa_manager->cpu_ptr = bo->vmap.vaddr;
 72		memset(sa_manager->cpu_ptr, 0, bo->ttm.base.size);
 73	}
 74
 75	ret = drmm_add_action_or_reset(&xe->drm, xe_sa_bo_manager_fini,
 76				       sa_manager);
 77	if (ret)
 78		return ERR_PTR(ret);
 79
 80	return sa_manager;
 81}
 82
 83struct drm_suballoc *xe_sa_bo_new(struct xe_sa_manager *sa_manager,
 84				  unsigned int size)
 85{
 86	return drm_suballoc_new(&sa_manager->base, size, GFP_KERNEL, true, 0);
 87}
 88
 89void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
 90{
 91	struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
 92	struct xe_device *xe = tile_to_xe(sa_manager->bo->tile);
 93
 94	if (!sa_manager->bo->vmap.is_iomem)
 95		return;
 96
 97	xe_map_memcpy_to(xe, &sa_manager->bo->vmap, drm_suballoc_soffset(sa_bo),
 98			 xe_sa_bo_cpu_addr(sa_bo),
 99			 drm_suballoc_size(sa_bo));
100}
101
102void xe_sa_bo_free(struct drm_suballoc *sa_bo,
103		   struct dma_fence *fence)
104{
105	drm_suballoc_free(sa_bo, fence);
106}