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 #include <subdev/therm.h>
30 
31 void
32 gf100_fb_intr(struct nvkm_fb *base)
33 {
34 	struct gf100_fb *fb = gf100_fb(base);
35 	struct nvkm_subdev *subdev = &fb->base.subdev;
36 	struct nvkm_device *device = subdev->device;
37 	u32 intr = nvkm_rd32(device, 0x000100);
38 	if (intr & 0x08000000)
39 		nvkm_debug(subdev, "PFFB intr\n");
40 	if (intr & 0x00002000)
41 		nvkm_debug(subdev, "PBFB intr\n");
42 }
43 
44 int
45 gf100_fb_oneinit(struct nvkm_fb *base)
46 {
47 	struct gf100_fb *fb = gf100_fb(base);
48 	struct nvkm_device *device = fb->base.subdev.device;
49 	int ret, size = 1 << (fb->base.page ? fb->base.page : 17);
50 
51 	size = nvkm_longopt(device->cfgopt, "MmuDebugBufferSize", size);
52 	size = max(size, 0x1000);
53 
54 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
55 			      true, &fb->base.mmu_rd);
56 	if (ret)
57 		return ret;
58 
59 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
60 			      true, &fb->base.mmu_wr);
61 	if (ret)
62 		return ret;
63 
64 	fb->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
65 	if (fb->r100c10_page) {
66 		fb->r100c10 = dma_map_page(device->dev, fb->r100c10_page, 0,
67 					   PAGE_SIZE, DMA_BIDIRECTIONAL);
68 		if (dma_mapping_error(device->dev, fb->r100c10))
69 			return -EFAULT;
70 	}
71 
72 	return 0;
73 }
74 
75 int
76 gf100_fb_init_page(struct nvkm_fb *fb)
77 {
78 	struct nvkm_device *device = fb->subdev.device;
79 	switch (fb->page) {
80 	case 16: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000001); break;
81 	case 17: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); break;
82 	default:
83 		return -EINVAL;
84 	}
85 	return 0;
86 }
87 
88 void
89 gf100_fb_init(struct nvkm_fb *base)
90 {
91 	struct gf100_fb *fb = gf100_fb(base);
92 	struct nvkm_device *device = fb->base.subdev.device;
93 
94 	if (fb->r100c10_page)
95 		nvkm_wr32(device, 0x100c10, fb->r100c10 >> 8);
96 
97 	if (base->func->clkgate_pack) {
98 		nvkm_therm_clkgate_init(device->therm,
99 					base->func->clkgate_pack);
100 	}
101 }
102 
103 void *
104 gf100_fb_dtor(struct nvkm_fb *base)
105 {
106 	struct gf100_fb *fb = gf100_fb(base);
107 	struct nvkm_device *device = fb->base.subdev.device;
108 
109 	if (fb->r100c10_page) {
110 		dma_unmap_page(device->dev, fb->r100c10, PAGE_SIZE,
111 			       DMA_BIDIRECTIONAL);
112 		__free_page(fb->r100c10_page);
113 	}
114 
115 	return fb;
116 }
117 
118 int
119 gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
120 	      enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
121 {
122 	struct gf100_fb *fb;
123 
124 	if (!(fb = kzalloc(sizeof(*fb), GFP_KERNEL)))
125 		return -ENOMEM;
126 	nvkm_fb_ctor(func, device, type, inst, &fb->base);
127 	*pfb = &fb->base;
128 
129 	return 0;
130 }
131 
132 static const struct nvkm_fb_func
133 gf100_fb = {
134 	.dtor = gf100_fb_dtor,
135 	.oneinit = gf100_fb_oneinit,
136 	.init = gf100_fb_init,
137 	.init_page = gf100_fb_init_page,
138 	.intr = gf100_fb_intr,
139 	.ram_new = gf100_ram_new,
140 	.default_bigpage = 17,
141 };
142 
143 int
144 gf100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
145 {
146 	return gf100_fb_new_(&gf100_fb, device, type, inst, pfb);
147 }
148