5dedce9c5183b778c53165ec2c072d51fec432c1
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / gpu / drm / nouveau / core / subdev / fb / nvc0.c
1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs
23  */
24
25 #include "priv.h"
26
27 struct nvc0_fb_priv {
28         struct nouveau_fb base;
29         struct page *r100c10_page;
30         dma_addr_t r100c10;
31 };
32
33 extern const u8 nvc0_pte_storage_type_map[256];
34
35 static bool
36 nvc0_fb_memtype_valid(struct nouveau_fb *pfb, u32 tile_flags)
37 {
38         u8 memtype = (tile_flags & 0x0000ff00) >> 8;
39         return likely((nvc0_pte_storage_type_map[memtype] != 0xff));
40 }
41
42 static int
43 nvc0_fb_init(struct nouveau_object *object)
44 {
45         struct nvc0_fb_priv *priv = (void *)object;
46         int ret;
47
48         ret = nouveau_fb_init(&priv->base);
49         if (ret)
50                 return ret;
51
52         if (priv->r100c10_page)
53                 nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
54         return 0;
55 }
56
57 static void
58 nvc0_fb_dtor(struct nouveau_object *object)
59 {
60         struct nouveau_device *device = nv_device(object);
61         struct nvc0_fb_priv *priv = (void *)object;
62
63         if (priv->r100c10_page) {
64                 pci_unmap_page(device->pdev, priv->r100c10, PAGE_SIZE,
65                                PCI_DMA_BIDIRECTIONAL);
66                 __free_page(priv->r100c10_page);
67         }
68
69         nouveau_fb_destroy(&priv->base);
70 }
71
72 static int
73 nvc0_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
74              struct nouveau_oclass *oclass, void *data, u32 size,
75              struct nouveau_object **pobject)
76 {
77         struct nouveau_device *device = nv_device(parent);
78         struct nvc0_fb_priv *priv;
79         int ret;
80
81         ret = nouveau_fb_create(parent, engine, oclass, &nvc0_ram_oclass, &priv);
82         *pobject = nv_object(priv);
83         if (ret)
84                 return ret;
85
86         priv->base.memtype_valid = nvc0_fb_memtype_valid;
87
88         priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
89         if (priv->r100c10_page) {
90                 priv->r100c10 = pci_map_page(device->pdev, priv->r100c10_page,
91                                              0, PAGE_SIZE,
92                                              PCI_DMA_BIDIRECTIONAL);
93                 if (pci_dma_mapping_error(device->pdev, priv->r100c10))
94                         return -EFAULT;
95         }
96
97         return 0;
98 }
99
100
101 struct nouveau_oclass *
102 nvc0_fb_oclass = &(struct nouveau_oclass) {
103         .handle = NV_SUBDEV(FB, 0xc0),
104         .ofuncs = &(struct nouveau_ofuncs) {
105                 .ctor = nvc0_fb_ctor,
106                 .dtor = nvc0_fb_dtor,
107                 .init = nvc0_fb_init,
108                 .fini = _nouveau_fb_fini,
109         },
110 };