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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2014 6WIND S.A.
*/
/* This file manages the list of devices and their arguments, as given
* by the user at startup
*
* Code here should not call rte_log since the EAL environment
* may not be initialized.
*/
#include <stdio.h>
#include <string.h>
#include <rte_compat.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include <rte_tailq.h>
#include "eal_private.h"
/** Global list of user devices */
struct rte_devargs_list devargs_list =
TAILQ_HEAD_INITIALIZER(devargs_list);
int
rte_eal_parse_devargs_str(const char *devargs_str,
char **drvname, char **drvargs)
{
char *sep;
if ((devargs_str) == NULL || (drvname) == NULL || (drvargs == NULL))
return -1;
*drvname = strdup(devargs_str);
if (*drvname == NULL)
return -1;
/* set the first ',' to '\0' to split name and arguments */
sep = strchr(*drvname, ',');
if (sep != NULL) {
sep[0] = '\0';
*drvargs = strdup(sep + 1);
} else {
*drvargs = strdup("");
}
if (*drvargs == NULL) {
free(*drvname);
*drvname = NULL;
return -1;
}
return 0;
}
static int
bus_name_cmp(const struct rte_bus *bus, const void *name)
{
return strncmp(bus->name, name, strlen(bus->name));
}
int __rte_experimental
rte_eal_devargs_parse(const char *dev, struct rte_devargs *da)
{
struct rte_bus *bus = NULL;
const char *devname;
const size_t maxlen = sizeof(da->name);
size_t i;
if (dev == NULL || da == NULL)
return -EINVAL;
/* Retrieve eventual bus info */
do {
devname = dev;
bus = rte_bus_find(bus, bus_name_cmp, dev);
if (bus == NULL)
break;
devname = dev + strlen(bus->name) + 1;
if (rte_bus_find_by_device_name(devname) == bus)
break;
} while (1);
/* Store device name */
i = 0;
while (devname[i] != '\0' && devname[i] != ',') {
da->name[i] = devname[i];
i++;
if (i == maxlen) {
fprintf(stderr, "WARNING: Parsing \"%s\": device name should be shorter than %zu\n",
dev, maxlen);
da->name[i - 1] = '\0';
return -EINVAL;
}
}
da->name[i] = '\0';
if (bus == NULL) {
bus = rte_bus_find_by_device_name(da->name);
if (bus == NULL) {
fprintf(stderr, "ERROR: failed to parse device \"%s\"\n",
da->name);
return -EFAULT;
}
}
da->bus = bus;
/* Parse eventual device arguments */
if (devname[i] == ',')
da->args = strdup(&devname[i + 1]);
else
da->args = strdup("");
if (da->args == NULL) {
fprintf(stderr, "ERROR: not enough memory to parse arguments\n");
return -ENOMEM;
}
return 0;
}
int __rte_experimental
rte_eal_devargs_insert(struct rte_devargs *da)
{
int ret;
ret = rte_eal_devargs_remove(da->bus->name, da->name);
if (ret < 0)
return ret;
TAILQ_INSERT_TAIL(&devargs_list, da, next);
return 0;
}
/* store a whitelist parameter for later parsing */
int
rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str)
{
struct rte_devargs *devargs = NULL;
struct rte_bus *bus = NULL;
const char *dev = devargs_str;
/* use calloc instead of rte_zmalloc as it's called early at init */
devargs = calloc(1, sizeof(*devargs));
if (devargs == NULL)
goto fail;
if (rte_eal_devargs_parse(dev, devargs))
goto fail;
devargs->type = devtype;
bus = devargs->bus;
if (devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI)
devargs->policy = RTE_DEV_BLACKLISTED;
if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
if (devargs->policy == RTE_DEV_WHITELISTED)
bus->conf.scan_mode = RTE_BUS_SCAN_WHITELIST;
else if (devargs->policy == RTE_DEV_BLACKLISTED)
bus->conf.scan_mode = RTE_BUS_SCAN_BLACKLIST;
}
TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
return 0;
fail:
if (devargs) {
free(devargs->args);
free(devargs);
}
return -1;
}
int __rte_experimental
rte_eal_devargs_remove(const char *busname, const char *devname)
{
struct rte_devargs *d;
void *tmp;
TAILQ_FOREACH_SAFE(d, &devargs_list, next, tmp) {
if (strcmp(d->bus->name, busname) == 0 &&
strcmp(d->name, devname) == 0) {
TAILQ_REMOVE(&devargs_list, d, next);
free(d->args);
free(d);
return 0;
}
}
return 1;
}
/* count the number of devices of a specified type */
unsigned int
rte_eal_devargs_type_count(enum rte_devtype devtype)
{
struct rte_devargs *devargs;
unsigned int count = 0;
TAILQ_FOREACH(devargs, &devargs_list, next) {
if (devargs->type != devtype)
continue;
count++;
}
return count;
}
/* dump the user devices on the console */
void
rte_eal_devargs_dump(FILE *f)
{
struct rte_devargs *devargs;
fprintf(f, "User device list:\n");
TAILQ_FOREACH(devargs, &devargs_list, next) {
fprintf(f, " [%s]: %s %s\n",
(devargs->bus ? devargs->bus->name : "??"),
devargs->name, devargs->args);
}
}
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