// SPDX-License-Identifier: MIT
/* utility to create the register check tables
* this includes inlined list.h safe for userspace.
*
* Copyright 2009 Jerome Glisse
* Copyright 2009 Red Hat Inc.
*
* Authors:
* Jerome Glisse
* Dave Airlie
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <regex.h>
#include <libgen.h>
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof(((type *)0)->member)*__mptr = (ptr); \
(type *)((char *)__mptr - offsetof(type, member)); })
/*
* Simple doubly linked list implementation.
*
* Some of the internal functions ("__xxx") are useful when
* manipulating whole lists rather than single entries, as
* sometimes we already know the next/prev entries and we can
* generate better code by using them directly rather than
* using the generic single-entry routines.
*/
struct list_head {
struct list_head *next, *prev;
};
static inline void INIT_LIST_HEAD(struct list_head *list)
{
list->next = list;
list->prev = list;
}
/*
* Insert a new entry between two known consecutive entries.
*
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
#ifndef CONFIG_DEBUG_LIST
static inline void __list_add(struct list_head *new,
struct list_head *prev, struct list_head *next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
#else
extern void __list_add(struct list_head *new,
struct list_head *prev, struct list_head *next);
#endif
/**
* list_add_tail - add a new entry
* @new: new entry to be added
* @head: list head to add it before
*
* Insert a new entry before the specified head.
* This is useful for implementing queues.
*/
static inline void list_add_tail(struct list_head *new, struct list_head *head)
{
__list_add(new, head->prev, head);
}
/**
* list_entry - get the struct for this entry
* @ptr: the &struct list_head pointer.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_head within the struct.
*/
#define list_entry(ptr, type, member) \
container_of(ptr, type, member)
/**
* list_for_each_entry - iterate over list of given type
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
* @member: the name of the list_head within the struct.
*/
#define list_for_each_entry(pos, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
struct offset {
struct list_head list;
unsigned offset;
};
struct table {
struct list_head offsets;
unsigned offset_max;
unsigned nentry;
unsigned *table;
char *gpu_prefix;
};
static struct offset *offset_new(unsigned o)
{
struct offset *offset;
offset = (struct offset *)malloc(sizeof(struct offset));
if (offset) {
INIT_LIST_HEAD(&offset->list);
offset->offset = o;
}
return offset;
}
static void table_offset_add(struct table *t, struct offset *offset)
{
list_add_tail(&offset->list, &t->offsets);
}
static void table_init(struct table *t)
{
INIT_LIST_HEAD(&t->offsets);
t->offset_max = 0;
t->nentry = 0;
t->table = NULL;
}
static void table_print(struct table *t)
{
unsigned nlloop, i, j, n, c, id;
nlloop = (t->nentry + 3) / 4;
c = t->nentry;
printf("static const unsigned %s_reg_safe_bm[%d] = {\n", t->gpu_prefix,
t->nentry);
for (i = 0, id = 0; i < nlloop; i++) {
n = 4;
if (n > c)
n = c;
c -= n;
for (j = 0; j < n; j++) {
if (j == 0)
printf("\t");
else
printf(" ");
printf("0x%08X,", t->table[id++]);
}
printf("\n");
}
printf("};\n");
}
static int table_build(struct table *t)
{
struct offset *offset;
unsigned i, m;
t->nentry = ((t->offset_max >> 2) + 31) / 32;
t->table = (unsigned *)malloc(sizeof(unsigned) * t->nentry);
if (t->table == NULL)
return -1;
memset(t->table, 0xff, sizeof(unsigned) * t->nentry);
list_for_each_entry(offset, &t->offsets, list) {
i = (offset->offset >> 2) / 32;
m = (offset->offset >> 2) & 31;
m = 1 << m;
t->table[i] ^= m;
}
return 0;
}
static char gpu_name[10];
static int parser_auth(struct table *t, const char *filename)
{
FILE *file;
regex_t mask_rex;
regmatch_t match[4];
char buf[1024];
size_t end;
int len;
int done = 0;
int r;
unsigned o;
struct offset *offset;
char last_reg_s[10];
int last_reg;
if (regcomp
(&mask_rex, "(0x[0-9a-fA-F]*) *([_a-zA-Z0-9]*)", REG_EXTENDED)) {
fprintf(stderr, "Failed to compile regular expression\n");
return -1;
}
file = fopen(filename, "r");
if (file == NULL) {
fprintf(stderr, "Failed to open: %s\n", filename);
return -1;
}
fseek(file, 0, SEEK_END);
end = ftell(file);
fseek(file, 0, SEEK_SET);
/* get header */
if (fgets(buf, 1024, file) == NULL) {
fclose(file);
return -1;
}
/* first line will contain the last register
* and gpu name */
sscanf(buf, "%9s %9s", gpu_name, last_reg_s);
t->gpu_prefix = gpu_name;
last_reg = strtol(last_reg_s, NULL, 16);
do {
if (fgets(buf, 1024, file) == NULL) {
fclose(file);
return -1;
}
len = strlen(buf);
if (ftell(file) == end)
done = 1;
if (len) {
r = regexec(&mask_rex, buf, 4, match, 0);
if (r == REG_NOMATCH) {
} else if (r) {
fprintf(stderr,
"Error matching regular expression %d in %s\n",
r, filename);
fclose(file);
return -1;
} else {
buf[match[0].rm_eo] = 0;
buf[match[1].rm_eo] = 0;
buf[match[2].rm_eo] = 0;
o = strtol(&buf[match[1].rm_so], NULL, 16);
offset = offset_new(o);
table_offset_add(t, offset);
if (o > t->offset_max)
t->offset_max = o;
}
}
} while (!done);
fclose(file);
if (t->offset_max < last_reg)
t->offset_max = last_reg;
return table_build(t);
}
int main(int argc, char *argv[])
{
struct table t;
if (argc != 2) {
fprintf(stderr, "Usage: %s <authfile>\n", argv[0]);
exit(1);
}
table_init(&t);
if (parser_auth(&t, argv[1])) {
fprintf(stderr, "Failed to parse file %s\n", argv[1]);
return -1;
}
table_print(&t);
return 0;
}
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