1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
// SPDX-License-Identifier: GPL-2.0
/* drivers/nubus/proc.c: Proc FS interface for NuBus.
By David Huggins-Daines <dhd@debian.org>
Much code and many ideas from drivers/pci/proc.c:
Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
This is initially based on the Zorro and PCI interfaces. However,
it works somewhat differently. The intent is to provide a
structure in /proc analogous to the structure of the NuBus ROM
resources.
Therefore each board function gets a directory, which may in turn
contain subdirectories. Each slot resource is a file. Unrecognized
resources are empty files, since every resource ID requires a special
case (e.g. if the resource ID implies a directory or block, then its
value has to be interpreted as a slot ROM pointer etc.).
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/nubus.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <asm/byteorder.h>
/*
* /proc/bus/nubus/devices stuff
*/
static int
nubus_devices_proc_show(struct seq_file *m, void *v)
{
struct nubus_rsrc *fres;
for_each_func_rsrc(fres)
seq_printf(m, "%x\t%04x %04x %04x %04x\t%08lx\n",
fres->board->slot, fres->category, fres->type,
fres->dr_sw, fres->dr_hw, fres->board->slot_addr);
return 0;
}
static struct proc_dir_entry *proc_bus_nubus_dir;
/*
* /proc/bus/nubus/x/ stuff
*/
struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
{
char name[2];
if (!proc_bus_nubus_dir)
return NULL;
snprintf(name, sizeof(name), "%x", board->slot);
return proc_mkdir(name, proc_bus_nubus_dir);
}
/* The PDE private data for any directory under /proc/bus/nubus/x/
* is the bytelanes value for the board in slot x.
*/
struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
struct nubus_board *board)
{
char name[9];
int lanes = board->lanes;
if (!procdir)
return NULL;
snprintf(name, sizeof(name), "%x", ent->type);
return proc_mkdir_data(name, 0555, procdir, (void *)lanes);
}
/* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to
* an instance of the following structure, which gives the location and size
* of the resource data in the slot ROM. For slot resources which hold only a
* small integer, this integer value is stored directly and size is set to 0.
* A NULL private data pointer indicates an unrecognized resource.
*/
struct nubus_proc_pde_data {
unsigned char *res_ptr;
unsigned int res_size;
};
static struct nubus_proc_pde_data *
nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size)
{
struct nubus_proc_pde_data *pde_data;
pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL);
if (!pde_data)
return NULL;
pde_data->res_ptr = ptr;
pde_data->res_size = size;
return pde_data;
}
static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
{
struct inode *inode = m->private;
struct nubus_proc_pde_data *pde_data;
pde_data = PDE_DATA(inode);
if (!pde_data)
return 0;
if (pde_data->res_size > m->size)
return -EFBIG;
if (pde_data->res_size) {
int lanes = (int)proc_get_parent_data(inode);
struct nubus_dirent ent;
if (!lanes)
return 0;
ent.mask = lanes;
ent.base = pde_data->res_ptr;
ent.data = 0;
nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size);
} else {
unsigned int data = (unsigned int)pde_data->res_ptr;
seq_putc(m, data >> 16);
seq_putc(m, data >> 8);
seq_putc(m, data >> 0);
}
return 0;
}
void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
unsigned int size)
{
char name[9];
struct nubus_proc_pde_data *pde_data;
if (!procdir)
return;
snprintf(name, sizeof(name), "%x", ent->type);
if (size)
pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
else
pde_data = NULL;
proc_create_single_data(name, S_IFREG | 0444, procdir,
nubus_proc_rsrc_show, pde_data);
}
void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent)
{
char name[9];
unsigned char *data = (unsigned char *)ent->data;
if (!procdir)
return;
snprintf(name, sizeof(name), "%x", ent->type);
proc_create_single_data(name, S_IFREG | 0444, procdir,
nubus_proc_rsrc_show,
nubus_proc_alloc_pde_data(data, 0));
}
/*
* /proc/nubus stuff
*/
void __init nubus_proc_init(void)
{
proc_create_single("nubus", 0, NULL, nubus_proc_show);
proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
if (!proc_bus_nubus_dir)
return;
proc_create_single("devices", 0, proc_bus_nubus_dir,
nubus_devices_proc_show);
}
|
