1 // SPDX-License-Identifier: MIT
2 /* utility to create the register check tables
3 * this includes inlined list.h safe for userspace.
4 *
5 * Copyright 2009 Jerome Glisse
6 * Copyright 2009 Red Hat Inc.
7 *
8 * Authors:
9 * Jerome Glisse
10 * Dave Airlie
11 */
12
13 #include <sys/types.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <stdio.h>
17 #include <regex.h>
18 #include <libgen.h>
19
20 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
21 /**
22 * container_of - cast a member of a structure out to the containing structure
23 * @ptr: the pointer to the member.
24 * @type: the type of the container struct this is embedded in.
25 * @member: the name of the member within the struct.
26 *
27 */
28 #define container_of(ptr, type, member) ({ \
29 const typeof(((type *)0)->member)*__mptr = (ptr); \
30 (type *)((char *)__mptr - offsetof(type, member)); })
31
32 /*
33 * Simple doubly linked list implementation.
34 *
35 * Some of the internal functions ("__xxx") are useful when
36 * manipulating whole lists rather than single entries, as
37 * sometimes we already know the next/prev entries and we can
38 * generate better code by using them directly rather than
39 * using the generic single-entry routines.
40 */
41
42 struct list_head {
43 struct list_head *next, *prev;
44 };
45
46
INIT_LIST_HEAD(struct list_head * list)47 static inline void INIT_LIST_HEAD(struct list_head *list)
48 {
49 list->next = list;
50 list->prev = list;
51 }
52
53 /*
54 * Insert a new entry between two known consecutive entries.
55 *
56 * This is only for internal list manipulation where we know
57 * the prev/next entries already!
58 */
59 #ifndef CONFIG_DEBUG_LIST
__list_add(struct list_head * new,struct list_head * prev,struct list_head * next)60 static inline void __list_add(struct list_head *new,
61 struct list_head *prev, struct list_head *next)
62 {
63 next->prev = new;
64 new->next = next;
65 new->prev = prev;
66 prev->next = new;
67 }
68 #else
69 extern void __list_add(struct list_head *new,
70 struct list_head *prev, struct list_head *next);
71 #endif
72
73 /**
74 * list_add_tail - add a new entry
75 * @new: new entry to be added
76 * @head: list head to add it before
77 *
78 * Insert a new entry before the specified head.
79 * This is useful for implementing queues.
80 */
list_add_tail(struct list_head * new,struct list_head * head)81 static inline void list_add_tail(struct list_head *new, struct list_head *head)
82 {
83 __list_add(new, head->prev, head);
84 }
85
86 /**
87 * list_entry - get the struct for this entry
88 * @ptr: the &struct list_head pointer.
89 * @type: the type of the struct this is embedded in.
90 * @member: the name of the list_head within the struct.
91 */
92 #define list_entry(ptr, type, member) \
93 container_of(ptr, type, member)
94
95 /**
96 * list_for_each_entry - iterate over list of given type
97 * @pos: the type * to use as a loop cursor.
98 * @head: the head for your list.
99 * @member: the name of the list_head within the struct.
100 */
101 #define list_for_each_entry(pos, head, member) \
102 for (pos = list_entry((head)->next, typeof(*pos), member); \
103 &pos->member != (head); \
104 pos = list_entry(pos->member.next, typeof(*pos), member))
105
106 struct offset {
107 struct list_head list;
108 unsigned offset;
109 };
110
111 struct table {
112 struct list_head offsets;
113 unsigned offset_max;
114 unsigned nentry;
115 unsigned *table;
116 char *gpu_prefix;
117 };
118
offset_new(unsigned o)119 static struct offset *offset_new(unsigned o)
120 {
121 struct offset *offset;
122
123 offset = (struct offset *)malloc(sizeof(struct offset));
124 if (offset) {
125 INIT_LIST_HEAD(&offset->list);
126 offset->offset = o;
127 }
128 return offset;
129 }
130
table_offset_add(struct table * t,struct offset * offset)131 static void table_offset_add(struct table *t, struct offset *offset)
132 {
133 list_add_tail(&offset->list, &t->offsets);
134 }
135
table_init(struct table * t)136 static void table_init(struct table *t)
137 {
138 INIT_LIST_HEAD(&t->offsets);
139 t->offset_max = 0;
140 t->nentry = 0;
141 t->table = NULL;
142 }
143
table_print(struct table * t)144 static void table_print(struct table *t)
145 {
146 unsigned nlloop, i, j, n, c, id;
147
148 nlloop = (t->nentry + 3) / 4;
149 c = t->nentry;
150 printf("static const unsigned %s_reg_safe_bm[%d] = {\n", t->gpu_prefix,
151 t->nentry);
152 for (i = 0, id = 0; i < nlloop; i++) {
153 n = 4;
154 if (n > c)
155 n = c;
156 c -= n;
157 for (j = 0; j < n; j++) {
158 if (j == 0)
159 printf("\t");
160 else
161 printf(" ");
162 printf("0x%08X,", t->table[id++]);
163 }
164 printf("\n");
165 }
166 printf("};\n");
167 }
168
table_build(struct table * t)169 static int table_build(struct table *t)
170 {
171 struct offset *offset;
172 unsigned i, m;
173
174 t->nentry = ((t->offset_max >> 2) + 31) / 32;
175 t->table = (unsigned *)malloc(sizeof(unsigned) * t->nentry);
176 if (t->table == NULL)
177 return -1;
178 memset(t->table, 0xff, sizeof(unsigned) * t->nentry);
179 list_for_each_entry(offset, &t->offsets, list) {
180 i = (offset->offset >> 2) / 32;
181 m = (offset->offset >> 2) & 31;
182 m = 1 << m;
183 t->table[i] ^= m;
184 }
185 return 0;
186 }
187
188 static char gpu_name[10];
parser_auth(struct table * t,const char * filename)189 static int parser_auth(struct table *t, const char *filename)
190 {
191 FILE *file;
192 regex_t mask_rex;
193 regmatch_t match[4];
194 char buf[1024];
195 size_t end;
196 int len;
197 int done = 0;
198 int r;
199 unsigned o;
200 struct offset *offset;
201 char last_reg_s[10];
202 int last_reg;
203
204 if (regcomp
205 (&mask_rex, "(0x[0-9a-fA-F]*) *([_a-zA-Z0-9]*)", REG_EXTENDED)) {
206 fprintf(stderr, "Failed to compile regular expression\n");
207 return -1;
208 }
209 file = fopen(filename, "r");
210 if (file == NULL) {
211 fprintf(stderr, "Failed to open: %s\n", filename);
212 return -1;
213 }
214 fseek(file, 0, SEEK_END);
215 end = ftell(file);
216 fseek(file, 0, SEEK_SET);
217
218 /* get header */
219 if (fgets(buf, 1024, file) == NULL) {
220 fclose(file);
221 return -1;
222 }
223
224 /* first line will contain the last register
225 * and gpu name */
226 sscanf(buf, "%9s %9s", gpu_name, last_reg_s);
227 t->gpu_prefix = gpu_name;
228 last_reg = strtol(last_reg_s, NULL, 16);
229
230 do {
231 if (fgets(buf, 1024, file) == NULL) {
232 fclose(file);
233 return -1;
234 }
235 len = strlen(buf);
236 if (ftell(file) == end)
237 done = 1;
238 if (len) {
239 r = regexec(&mask_rex, buf, 4, match, 0);
240 if (r == REG_NOMATCH) {
241 } else if (r) {
242 fprintf(stderr,
243 "Error matching regular expression %d in %s\n",
244 r, filename);
245 fclose(file);
246 return -1;
247 } else {
248 buf[match[0].rm_eo] = 0;
249 buf[match[1].rm_eo] = 0;
250 buf[match[2].rm_eo] = 0;
251 o = strtol(&buf[match[1].rm_so], NULL, 16);
252 offset = offset_new(o);
253 table_offset_add(t, offset);
254 if (o > t->offset_max)
255 t->offset_max = o;
256 }
257 }
258 } while (!done);
259 fclose(file);
260 if (t->offset_max < last_reg)
261 t->offset_max = last_reg;
262 return table_build(t);
263 }
264
main(int argc,char * argv[])265 int main(int argc, char *argv[])
266 {
267 struct table t;
268
269 if (argc != 2) {
270 fprintf(stderr, "Usage: %s <authfile>\n", argv[0]);
271 exit(1);
272 }
273 table_init(&t);
274 if (parser_auth(&t, argv[1])) {
275 fprintf(stderr, "Failed to parse file %s\n", argv[1]);
276 return -1;
277 }
278 table_print(&t);
279 return 0;
280 }
281