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  */
23 #include "priv.h"
24 
25 #include <core/pci.h>
26 
27 struct priv {
28 	struct pci_dev *pdev;
29 	void __iomem *rom;
30 	size_t size;
31 };
32 
33 static u32
34 pcirom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
35 {
36 	struct priv *priv = data;
37 	if (offset + length <= priv->size) {
38 		memcpy_fromio(bios->data + offset, priv->rom + offset, length);
39 		return length;
40 	}
41 	return 0;
42 }
43 
44 static void
45 pcirom_fini(void *data)
46 {
47 	struct priv *priv = data;
48 	pci_unmap_rom(priv->pdev, priv->rom);
49 	pci_disable_rom(priv->pdev);
50 	kfree(priv);
51 }
52 
53 static void *
54 pcirom_init(struct nvkm_bios *bios, const char *name)
55 {
56 	struct nvkm_device *device = bios->subdev.device;
57 	struct priv *priv = NULL;
58 	struct pci_dev *pdev;
59 	int ret;
60 
61 	if (device->func->pci)
62 		pdev = device->func->pci(device)->pdev;
63 	else
64 		return ERR_PTR(-ENODEV);
65 
66 	if (!(ret = pci_enable_rom(pdev))) {
67 		if (ret = -ENOMEM,
68 		    (priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
69 			if (ret = -EFAULT,
70 			    (priv->rom = pci_map_rom(pdev, &priv->size))) {
71 				priv->pdev = pdev;
72 				return priv;
73 			}
74 			kfree(priv);
75 		}
76 		pci_disable_rom(pdev);
77 	}
78 
79 	return ERR_PTR(ret);
80 }
81 
82 const struct nvbios_source
83 nvbios_pcirom = {
84 	.name = "PCIROM",
85 	.init = pcirom_init,
86 	.fini = pcirom_fini,
87 	.read = pcirom_read,
88 	.rw = true,
89 };
90 
91 static void *
92 platform_init(struct nvkm_bios *bios, const char *name)
93 {
94 	struct nvkm_device *device = bios->subdev.device;
95 	struct pci_dev *pdev;
96 	struct priv *priv;
97 	int ret = -ENOMEM;
98 
99 	if (device->func->pci)
100 		pdev = device->func->pci(device)->pdev;
101 	else
102 		return ERR_PTR(-ENODEV);
103 
104 	if (!pdev->rom || pdev->romlen == 0)
105 		return ERR_PTR(-ENODEV);
106 
107 	if ((priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
108 		priv->size = pdev->romlen;
109 		if (ret = -ENODEV,
110 		    (priv->rom = ioremap(pdev->rom, pdev->romlen)))
111 			return priv;
112 		kfree(priv);
113 	}
114 
115 	return ERR_PTR(ret);
116 }
117 
118 static void
119 platform_fini(void *data)
120 {
121 	struct priv *priv = data;
122 
123 	iounmap(priv->rom);
124 	kfree(priv);
125 }
126 
127 const struct nvbios_source
128 nvbios_platform = {
129 	.name = "PLATFORM",
130 	.init = platform_init,
131 	.fini = platform_fini,
132 	.read = pcirom_read,
133 	.rw = true,
134 };
135