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1 /*
2  * Copyright 2014 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 <bskeggs@redhat.com>
23  */
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/image.h>
27 #include <subdev/bios/pmu.h>
28 
29 static u32
weirdo_pointer(struct nvkm_bios * bios,u32 data)30 weirdo_pointer(struct nvkm_bios *bios, u32 data)
31 {
32 	struct nvbios_image image;
33 	int idx = 0;
34 	if (nvbios_image(bios, idx++, &image)) {
35 		data -= image.size;
36 		while (nvbios_image(bios, idx++, &image)) {
37 			if (image.type == 0xe0)
38 				return image.base + data;
39 		}
40 	}
41 	return 0;
42 }
43 
44 u32
nvbios_pmuTe(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)45 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
46 {
47 	struct bit_entry bit_p;
48 	u32 data = 0;
49 
50 	if (!bit_entry(bios, 'p', &bit_p)) {
51 		if (bit_p.version == 2 && bit_p.length >= 4)
52 			data = nvbios_rd32(bios, bit_p.offset + 0x00);
53 		if ((data = weirdo_pointer(bios, data))) {
54 			*ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
55 			*hdr = nvbios_rd08(bios, data + 0x01);
56 			*len = nvbios_rd08(bios, data + 0x02);
57 			*cnt = nvbios_rd08(bios, data + 0x03);
58 		}
59 	}
60 
61 	return data;
62 }
63 
64 u32
nvbios_pmuEe(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr)65 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
66 {
67 	u8  cnt, len;
68 	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
69 	if (data && idx < cnt) {
70 		data = data + *hdr + (idx * len);
71 		*hdr = len;
72 		return data;
73 	}
74 	return 0;
75 }
76 
77 u32
nvbios_pmuEp(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,struct nvbios_pmuE * info)78 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
79 	     struct nvbios_pmuE *info)
80 {
81 	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
82 	memset(info, 0x00, sizeof(*info));
83 	switch (!!data * *ver) {
84 	default:
85 		info->type = nvbios_rd08(bios, data + 0x00);
86 		info->data = nvbios_rd32(bios, data + 0x02);
87 		break;
88 	}
89 	return data;
90 }
91 
92 bool
nvbios_pmuRm(struct nvkm_bios * bios,u8 type,struct nvbios_pmuR * info)93 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
94 {
95 	struct nvbios_pmuE pmuE;
96 	u8  ver, hdr, idx = 0;
97 	u32 data;
98 	memset(info, 0x00, sizeof(*info));
99 	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
100 		if ( pmuE.type == type &&
101 		    (data = weirdo_pointer(bios, pmuE.data))) {
102 			info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
103 			info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
104 			info->boot_addr     = data + 0x30;
105 			info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
106 					      nvbios_rd32(bios, data + 0x18);
107 			info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
108 					      nvbios_rd32(bios, data + 0x18);
109 			info->code_addr     = info->boot_addr + info->boot_size;
110 			info->code_addr_pmu = info->boot_addr_pmu +
111 					      info->boot_size;
112 			info->code_size     = nvbios_rd32(bios, data + 0x20);
113 			info->data_addr     = data + 0x30 +
114 					      nvbios_rd32(bios, data + 0x24);
115 			info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
116 			info->data_size     = nvbios_rd32(bios, data + 0x2c);
117 			return true;
118 		}
119 	}
120 	return false;
121 }
122