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1// SPDX-License-Identifier: GPL-2.0
2/* drivers/nubus/proc.c: Proc FS interface for NuBus.
3
4 By David Huggins-Daines <dhd@debian.org>
5
6 Much code and many ideas from drivers/pci/proc.c:
7 Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
8
9 This is initially based on the Zorro and PCI interfaces. However,
10 it works somewhat differently. The intent is to provide a
11 structure in /proc analogous to the structure of the NuBus ROM
12 resources.
13
14 Therefore each board function gets a directory, which may in turn
15 contain subdirectories. Each slot resource is a file. Unrecognized
16 resources are empty files, since every resource ID requires a special
17 case (e.g. if the resource ID implies a directory or block, then its
18 value has to be interpreted as a slot ROM pointer etc.).
19 */
20
21#include <linux/types.h>
22#include <linux/kernel.h>
23#include <linux/nubus.h>
24#include <linux/proc_fs.h>
25#include <linux/seq_file.h>
26#include <linux/slab.h>
27#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/uaccess.h>
30#include <asm/byteorder.h>
31
32/*
33 * /proc/bus/nubus/devices stuff
34 */
35
36static int
37nubus_devices_proc_show(struct seq_file *m, void *v)
38{
39 struct nubus_rsrc *fres;
40
41 for_each_func_rsrc(fres)
42 seq_printf(m, "%x\t%04x %04x %04x %04x\t%08lx\n",
43 fres->board->slot, fres->category, fres->type,
44 fres->dr_sw, fres->dr_hw, fres->board->slot_addr);
45 return 0;
46}
47
48static struct proc_dir_entry *proc_bus_nubus_dir;
49
50/*
51 * /proc/bus/nubus/x/ stuff
52 */
53
54struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
55{
56 char name[2];
57
58 if (!proc_bus_nubus_dir)
59 return NULL;
60 snprintf(name, sizeof(name), "%x", board->slot);
61 return proc_mkdir(name, proc_bus_nubus_dir);
62}
63
64/* The PDE private data for any directory under /proc/bus/nubus/x/
65 * is the bytelanes value for the board in slot x.
66 */
67
68struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
69 const struct nubus_dirent *ent,
70 struct nubus_board *board)
71{
72 char name[9];
73 int lanes = board->lanes;
74
75 if (!procdir)
76 return NULL;
77 snprintf(name, sizeof(name), "%x", ent->type);
78 return proc_mkdir_data(name, 0555, procdir, (void *)lanes);
79}
80
81/* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to
82 * an instance of the following structure, which gives the location and size
83 * of the resource data in the slot ROM. For slot resources which hold only a
84 * small integer, this integer value is stored directly and size is set to 0.
85 * A NULL private data pointer indicates an unrecognized resource.
86 */
87
88struct nubus_proc_pde_data {
89 unsigned char *res_ptr;
90 unsigned int res_size;
91};
92
93static struct nubus_proc_pde_data *
94nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size)
95{
96 struct nubus_proc_pde_data *pde_data;
97
98 pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL);
99 if (!pde_data)
100 return NULL;
101
102 pde_data->res_ptr = ptr;
103 pde_data->res_size = size;
104 return pde_data;
105}
106
107static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
108{
109 struct inode *inode = m->private;
110 struct nubus_proc_pde_data *pde_data;
111
112 pde_data = PDE_DATA(inode);
113 if (!pde_data)
114 return 0;
115
116 if (pde_data->res_size > m->size)
117 return -EFBIG;
118
119 if (pde_data->res_size) {
120 int lanes = (int)proc_get_parent_data(inode);
121 struct nubus_dirent ent;
122
123 if (!lanes)
124 return 0;
125
126 ent.mask = lanes;
127 ent.base = pde_data->res_ptr;
128 ent.data = 0;
129 nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size);
130 } else {
131 unsigned int data = (unsigned int)pde_data->res_ptr;
132
133 seq_putc(m, data >> 16);
134 seq_putc(m, data >> 8);
135 seq_putc(m, data >> 0);
136 }
137 return 0;
138}
139
140void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
141 const struct nubus_dirent *ent,
142 unsigned int size)
143{
144 char name[9];
145 struct nubus_proc_pde_data *pde_data;
146
147 if (!procdir)
148 return;
149
150 snprintf(name, sizeof(name), "%x", ent->type);
151 if (size)
152 pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
153 else
154 pde_data = NULL;
155 proc_create_single_data(name, S_IFREG | 0444, procdir,
156 nubus_proc_rsrc_show, pde_data);
157}
158
159void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
160 const struct nubus_dirent *ent)
161{
162 char name[9];
163 unsigned char *data = (unsigned char *)ent->data;
164
165 if (!procdir)
166 return;
167
168 snprintf(name, sizeof(name), "%x", ent->type);
169 proc_create_single_data(name, S_IFREG | 0444, procdir,
170 nubus_proc_rsrc_show,
171 nubus_proc_alloc_pde_data(data, 0));
172}
173
174/*
175 * /proc/nubus stuff
176 */
177
178void __init nubus_proc_init(void)
179{
180 proc_create_single("nubus", 0, NULL, nubus_proc_show);
181 proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
182 if (!proc_bus_nubus_dir)
183 return;
184 proc_create_single("devices", 0, proc_bus_nubus_dir,
185 nubus_devices_proc_show);
186}
1// SPDX-License-Identifier: GPL-2.0
2/* drivers/nubus/proc.c: Proc FS interface for NuBus.
3
4 By David Huggins-Daines <dhd@debian.org>
5
6 Much code and many ideas from drivers/pci/proc.c:
7 Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
8
9 This is initially based on the Zorro and PCI interfaces. However,
10 it works somewhat differently. The intent is to provide a
11 structure in /proc analogous to the structure of the NuBus ROM
12 resources.
13
14 Therefore each board function gets a directory, which may in turn
15 contain subdirectories. Each slot resource is a file. Unrecognized
16 resources are empty files, since every resource ID requires a special
17 case (e.g. if the resource ID implies a directory or block, then its
18 value has to be interpreted as a slot ROM pointer etc.).
19 */
20
21#include <linux/types.h>
22#include <linux/kernel.h>
23#include <linux/nubus.h>
24#include <linux/proc_fs.h>
25#include <linux/seq_file.h>
26#include <linux/slab.h>
27#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/uaccess.h>
30#include <asm/byteorder.h>
31
32/*
33 * /proc/bus/nubus/devices stuff
34 */
35
36static int
37nubus_devices_proc_show(struct seq_file *m, void *v)
38{
39 struct nubus_rsrc *fres;
40
41 for_each_func_rsrc(fres)
42 seq_printf(m, "%x\t%04x %04x %04x %04x\t%08lx\n",
43 fres->board->slot, fres->category, fres->type,
44 fres->dr_sw, fres->dr_hw, fres->board->slot_addr);
45 return 0;
46}
47
48static int nubus_devices_proc_open(struct inode *inode, struct file *file)
49{
50 return single_open(file, nubus_devices_proc_show, NULL);
51}
52
53static const struct file_operations nubus_devices_proc_fops = {
54 .open = nubus_devices_proc_open,
55 .read = seq_read,
56 .llseek = seq_lseek,
57 .release = single_release,
58};
59
60static struct proc_dir_entry *proc_bus_nubus_dir;
61
62/*
63 * /proc/bus/nubus/x/ stuff
64 */
65
66struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
67{
68 char name[2];
69
70 if (!proc_bus_nubus_dir)
71 return NULL;
72 snprintf(name, sizeof(name), "%x", board->slot);
73 return proc_mkdir(name, proc_bus_nubus_dir);
74}
75
76/* The PDE private data for any directory under /proc/bus/nubus/x/
77 * is the bytelanes value for the board in slot x.
78 */
79
80struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
81 const struct nubus_dirent *ent,
82 struct nubus_board *board)
83{
84 char name[9];
85 int lanes = board->lanes;
86
87 if (!procdir)
88 return NULL;
89 snprintf(name, sizeof(name), "%x", ent->type);
90 return proc_mkdir_data(name, 0555, procdir, (void *)lanes);
91}
92
93/* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to
94 * an instance of the following structure, which gives the location and size
95 * of the resource data in the slot ROM. For slot resources which hold only a
96 * small integer, this integer value is stored directly and size is set to 0.
97 * A NULL private data pointer indicates an unrecognized resource.
98 */
99
100struct nubus_proc_pde_data {
101 unsigned char *res_ptr;
102 unsigned int res_size;
103};
104
105static struct nubus_proc_pde_data *
106nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size)
107{
108 struct nubus_proc_pde_data *pde_data;
109
110 pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL);
111 if (!pde_data)
112 return NULL;
113
114 pde_data->res_ptr = ptr;
115 pde_data->res_size = size;
116 return pde_data;
117}
118
119static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
120{
121 struct inode *inode = m->private;
122 struct nubus_proc_pde_data *pde_data;
123
124 pde_data = PDE_DATA(inode);
125 if (!pde_data)
126 return 0;
127
128 if (pde_data->res_size > m->size)
129 return -EFBIG;
130
131 if (pde_data->res_size) {
132 int lanes = (int)proc_get_parent_data(inode);
133 struct nubus_dirent ent;
134
135 if (!lanes)
136 return 0;
137
138 ent.mask = lanes;
139 ent.base = pde_data->res_ptr;
140 ent.data = 0;
141 nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size);
142 } else {
143 unsigned int data = (unsigned int)pde_data->res_ptr;
144
145 seq_putc(m, data >> 16);
146 seq_putc(m, data >> 8);
147 seq_putc(m, data >> 0);
148 }
149 return 0;
150}
151
152static int nubus_proc_rsrc_open(struct inode *inode, struct file *file)
153{
154 return single_open(file, nubus_proc_rsrc_show, inode);
155}
156
157static const struct file_operations nubus_proc_rsrc_fops = {
158 .open = nubus_proc_rsrc_open,
159 .read = seq_read,
160 .llseek = seq_lseek,
161 .release = single_release,
162};
163
164void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
165 const struct nubus_dirent *ent,
166 unsigned int size)
167{
168 char name[9];
169 struct nubus_proc_pde_data *pde_data;
170
171 if (!procdir)
172 return;
173
174 snprintf(name, sizeof(name), "%x", ent->type);
175 if (size)
176 pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
177 else
178 pde_data = NULL;
179 proc_create_data(name, S_IFREG | 0444, procdir,
180 &nubus_proc_rsrc_fops, pde_data);
181}
182
183void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
184 const struct nubus_dirent *ent)
185{
186 char name[9];
187 unsigned char *data = (unsigned char *)ent->data;
188
189 if (!procdir)
190 return;
191
192 snprintf(name, sizeof(name), "%x", ent->type);
193 proc_create_data(name, S_IFREG | 0444, procdir,
194 &nubus_proc_rsrc_fops,
195 nubus_proc_alloc_pde_data(data, 0));
196}
197
198/*
199 * /proc/nubus stuff
200 */
201
202static int nubus_proc_open(struct inode *inode, struct file *file)
203{
204 return single_open(file, nubus_proc_show, NULL);
205}
206
207static const struct file_operations nubus_proc_fops = {
208 .open = nubus_proc_open,
209 .read = seq_read,
210 .llseek = seq_lseek,
211 .release = single_release,
212};
213
214void __init nubus_proc_init(void)
215{
216 proc_create("nubus", 0, NULL, &nubus_proc_fops);
217 proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
218 if (!proc_bus_nubus_dir)
219 return;
220 proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops);
221}