tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_FLAG_VRAM_IF_DGFX(tile) |
52 XE_BO_FLAG_GGTT |
53 XE_BO_FLAG_GGTT_INVALIDATE);
54 if (IS_ERR(bo)) {
55 drm_err(&xe->drm, "failed to allocate bo for sa manager: %ld\n",
56 PTR_ERR(bo));
57 return (struct xe_sa_manager *)bo;
58 }
59 sa_manager->bo = bo;
60
61 drm_suballoc_manager_init(&sa_manager->base, managed_size, align);
62 sa_manager->gpu_addr = xe_bo_ggtt_addr(bo);
63
64 if (bo->vmap.is_iomem) {
65 sa_manager->cpu_ptr = kvzalloc(managed_size, GFP_KERNEL);
66 if (!sa_manager->cpu_ptr) {
67 xe_bo_unpin_map_no_vm(sa_manager->bo);
68 sa_manager->bo = NULL;
69 return ERR_PTR(-ENOMEM);
70 }
71 } else {
72 sa_manager->cpu_ptr = bo->vmap.vaddr;
73 memset(sa_manager->cpu_ptr, 0, bo->ttm.base.size);
74 }
75
76 ret = drmm_add_action_or_reset(&xe->drm, xe_sa_bo_manager_fini,
77 sa_manager);
78 if (ret)
79 return ERR_PTR(ret);
80
81 return sa_manager;
82}
83
84struct drm_suballoc *xe_sa_bo_new(struct xe_sa_manager *sa_manager,
85 unsigned int size)
86{
87 return drm_suballoc_new(&sa_manager->base, size, GFP_KERNEL, true, 0);
88}
89
90void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
91{
92 struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
93 struct xe_device *xe = tile_to_xe(sa_manager->bo->tile);
94
95 if (!sa_manager->bo->vmap.is_iomem)
96 return;
97
98 xe_map_memcpy_to(xe, &sa_manager->bo->vmap, drm_suballoc_soffset(sa_bo),
99 xe_sa_bo_cpu_addr(sa_bo),
100 drm_suballoc_size(sa_bo));
101}
102
103void xe_sa_bo_free(struct drm_suballoc *sa_bo,
104 struct dma_fence *fence)
105{
106 drm_suballoc_free(sa_bo, fence);
107}