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
27struct priv {
28	struct pci_dev *pdev;
29	void __iomem *rom;
30	size_t size;
31};
32
33static u32
34pcirom_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
44static void
45pcirom_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
53static void *
54pcirom_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
82const struct nvbios_source
83nvbios_pcirom = {
84	.name = "PCIROM",
85	.init = pcirom_init,
86	.fini = pcirom_fini,
87	.read = pcirom_read,
88	.rw = true,
89};
90
91static void *
92platform_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
118static void
119platform_fini(void *data)
120{
121	struct priv *priv = data;
122
123	iounmap(priv->rom);
124	kfree(priv);
125}
126
127const struct nvbios_source
128nvbios_platform = {
129	.name = "PLATFORM",
130	.init = platform_init,
131	.fini = platform_fini,
132	.read = pcirom_read,
133	.rw = true,
134};
135