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 #include <core/memory.h>
28 #include <core/option.h>
29 
30 extern const u8 gf100_pte_storage_type_map[256];
31 
32 bool
33 gf100_fb_memtype_valid(struct nvkm_fb *fb, u32 tile_flags)
34 {
35 	u8 memtype = (tile_flags & 0x0000ff00) >> 8;
36 	return likely((gf100_pte_storage_type_map[memtype] != 0xff));
37 }
38 
39 void
40 gf100_fb_intr(struct nvkm_fb *base)
41 {
42 	struct gf100_fb *fb = gf100_fb(base);
43 	struct nvkm_subdev *subdev = &fb->base.subdev;
44 	struct nvkm_device *device = subdev->device;
45 	u32 intr = nvkm_rd32(device, 0x000100);
46 	if (intr & 0x08000000)
47 		nvkm_debug(subdev, "PFFB intr\n");
48 	if (intr & 0x00002000)
49 		nvkm_debug(subdev, "PBFB intr\n");
50 }
51 
52 int
53 gf100_fb_oneinit(struct nvkm_fb *base)
54 {
55 	struct gf100_fb *fb = gf100_fb(base);
56 	struct nvkm_device *device = fb->base.subdev.device;
57 	int ret, size = 0x1000;
58 
59 	size = nvkm_longopt(device->cfgopt, "MmuDebugBufferSize", size);
60 	size = min(size, 0x1000);
61 
62 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
63 			      false, &fb->base.mmu_rd);
64 	if (ret)
65 		return ret;
66 
67 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
68 			      false, &fb->base.mmu_wr);
69 	if (ret)
70 		return ret;
71 
72 	fb->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
73 	if (fb->r100c10_page) {
74 		fb->r100c10 = dma_map_page(device->dev, fb->r100c10_page, 0,
75 					   PAGE_SIZE, DMA_BIDIRECTIONAL);
76 		if (dma_mapping_error(device->dev, fb->r100c10))
77 			return -EFAULT;
78 	}
79 
80 	return 0;
81 }
82 
83 void
84 gf100_fb_init_page(struct nvkm_fb *fb)
85 {
86 	struct nvkm_device *device = fb->subdev.device;
87 	switch (fb->page) {
88 	case 16:
89 		nvkm_mask(device, 0x100c80, 0x00000001, 0x00000001);
90 		break;
91 	case 17:
92 	default:
93 		nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000);
94 		fb->page = 17;
95 		break;
96 	}
97 }
98 
99 void
100 gf100_fb_init(struct nvkm_fb *base)
101 {
102 	struct gf100_fb *fb = gf100_fb(base);
103 	struct nvkm_device *device = fb->base.subdev.device;
104 
105 	if (fb->r100c10_page)
106 		nvkm_wr32(device, 0x100c10, fb->r100c10 >> 8);
107 }
108 
109 void *
110 gf100_fb_dtor(struct nvkm_fb *base)
111 {
112 	struct gf100_fb *fb = gf100_fb(base);
113 	struct nvkm_device *device = fb->base.subdev.device;
114 
115 	if (fb->r100c10_page) {
116 		dma_unmap_page(device->dev, fb->r100c10, PAGE_SIZE,
117 			       DMA_BIDIRECTIONAL);
118 		__free_page(fb->r100c10_page);
119 	}
120 
121 	return fb;
122 }
123 
124 int
125 gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
126 	      int index, struct nvkm_fb **pfb)
127 {
128 	struct gf100_fb *fb;
129 
130 	if (!(fb = kzalloc(sizeof(*fb), GFP_KERNEL)))
131 		return -ENOMEM;
132 	nvkm_fb_ctor(func, device, index, &fb->base);
133 	*pfb = &fb->base;
134 
135 	return 0;
136 }
137 
138 static const struct nvkm_fb_func
139 gf100_fb = {
140 	.dtor = gf100_fb_dtor,
141 	.oneinit = gf100_fb_oneinit,
142 	.init = gf100_fb_init,
143 	.init_page = gf100_fb_init_page,
144 	.intr = gf100_fb_intr,
145 	.ram_new = gf100_ram_new,
146 	.memtype_valid = gf100_fb_memtype_valid,
147 };
148 
149 int
150 gf100_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
151 {
152 	return gf100_fb_new_(&gf100_fb, device, index, pfb);
153 }
154