Merge tag 'dlm-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
[linux-2.6-microblaze.git] / drivers / gpu / drm / nouveau / nouveau_sgdma.c
1 // SPDX-License-Identifier: MIT
2 #include <linux/pagemap.h>
3 #include <linux/slab.h>
4
5 #include "nouveau_drv.h"
6 #include "nouveau_mem.h"
7 #include "nouveau_ttm.h"
8
9 struct nouveau_sgdma_be {
10         /* this has to be the first field so populate/unpopulated in
11          * nouve_bo.c works properly, otherwise have to move them here
12          */
13         struct ttm_dma_tt ttm;
14         struct nouveau_mem *mem;
15 };
16
17 static void
18 nouveau_sgdma_destroy(struct ttm_tt *ttm)
19 {
20         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
21
22         if (ttm) {
23                 ttm_dma_tt_fini(&nvbe->ttm);
24                 kfree(nvbe);
25         }
26 }
27
28 static int
29 nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
30 {
31         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
32         struct nouveau_mem *mem = nouveau_mem(reg);
33         int ret;
34
35         ret = nouveau_mem_host(reg, &nvbe->ttm);
36         if (ret)
37                 return ret;
38
39         ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
40         if (ret) {
41                 nouveau_mem_fini(mem);
42                 return ret;
43         }
44
45         nvbe->mem = mem;
46         return 0;
47 }
48
49 static void
50 nv04_sgdma_unbind(struct ttm_tt *ttm)
51 {
52         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
53         nouveau_mem_fini(nvbe->mem);
54 }
55
56 static struct ttm_backend_func nv04_sgdma_backend = {
57         .bind                   = nv04_sgdma_bind,
58         .unbind                 = nv04_sgdma_unbind,
59         .destroy                = nouveau_sgdma_destroy
60 };
61
62 static int
63 nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
64 {
65         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
66         struct nouveau_mem *mem = nouveau_mem(reg);
67         int ret;
68
69         ret = nouveau_mem_host(reg, &nvbe->ttm);
70         if (ret)
71                 return ret;
72
73         nvbe->mem = mem;
74         return 0;
75 }
76
77 static struct ttm_backend_func nv50_sgdma_backend = {
78         .bind                   = nv50_sgdma_bind,
79         .unbind                 = nv04_sgdma_unbind,
80         .destroy                = nouveau_sgdma_destroy
81 };
82
83 struct ttm_tt *
84 nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
85 {
86         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
87         struct nouveau_sgdma_be *nvbe;
88
89         nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
90         if (!nvbe)
91                 return NULL;
92
93         if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
94                 nvbe->ttm.ttm.func = &nv04_sgdma_backend;
95         else
96                 nvbe->ttm.ttm.func = &nv50_sgdma_backend;
97
98         if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) {
99                 kfree(nvbe);
100                 return NULL;
101         }
102         return &nvbe->ttm.ttm;
103 }