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 #include "gf100.h"
25 #include "ram.h"
26 
27 extern const u8 gf100_pte_storage_type_map[256];
28 
29 bool
30 gf100_fb_memtype_valid(struct nvkm_fb *fb, u32 tile_flags)
31 {
32 	u8 memtype = (tile_flags & 0x0000ff00) >> 8;
33 	return likely((gf100_pte_storage_type_map[memtype] != 0xff));
34 }
35 
36 void
37 gf100_fb_intr(struct nvkm_fb *base)
38 {
39 	struct gf100_fb *fb = gf100_fb(base);
40 	struct nvkm_subdev *subdev = &fb->base.subdev;
41 	struct nvkm_device *device = subdev->device;
42 	u32 intr = nvkm_rd32(device, 0x000100);
43 	if (intr & 0x08000000)
44 		nvkm_debug(subdev, "PFFB intr\n");
45 	if (intr & 0x00002000)
46 		nvkm_debug(subdev, "PBFB intr\n");
47 }
48 
49 void
50 gf100_fb_init(struct nvkm_fb *base)
51 {
52 	struct gf100_fb *fb = gf100_fb(base);
53 	struct nvkm_device *device = fb->base.subdev.device;
54 
55 	if (fb->r100c10_page)
56 		nvkm_wr32(device, 0x100c10, fb->r100c10 >> 8);
57 
58 	nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
59 }
60 
61 void *
62 gf100_fb_dtor(struct nvkm_fb *base)
63 {
64 	struct gf100_fb *fb = gf100_fb(base);
65 	struct nvkm_device *device = fb->base.subdev.device;
66 
67 	if (fb->r100c10_page) {
68 		dma_unmap_page(device->dev, fb->r100c10, PAGE_SIZE,
69 			       DMA_BIDIRECTIONAL);
70 		__free_page(fb->r100c10_page);
71 	}
72 
73 	return fb;
74 }
75 
76 int
77 gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
78 	      int index, struct nvkm_fb **pfb)
79 {
80 	struct gf100_fb *fb;
81 
82 	if (!(fb = kzalloc(sizeof(*fb), GFP_KERNEL)))
83 		return -ENOMEM;
84 	nvkm_fb_ctor(func, device, index, &fb->base);
85 	*pfb = &fb->base;
86 
87 	fb->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
88 	if (fb->r100c10_page) {
89 		fb->r100c10 = dma_map_page(device->dev, fb->r100c10_page, 0,
90 					   PAGE_SIZE, DMA_BIDIRECTIONAL);
91 		if (dma_mapping_error(device->dev, fb->r100c10))
92 			return -EFAULT;
93 	}
94 
95 	return 0;
96 }
97 
98 static const struct nvkm_fb_func
99 gf100_fb = {
100 	.dtor = gf100_fb_dtor,
101 	.init = gf100_fb_init,
102 	.intr = gf100_fb_intr,
103 	.ram_new = gf100_ram_new,
104 	.memtype_valid = gf100_fb_memtype_valid,
105 };
106 
107 int
108 gf100_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
109 {
110 	return gf100_fb_new_(&gf100_fb, device, index, pfb);
111 }
112