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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Gaëtan Rivet
*/
#include <stdlib.h>
#include <string.h>
#include <rte_class.h>
#include <rte_errno.h>
#include <rte_kvargs.h>
#include <rte_log.h>
#include "rte_ethdev.h"
#include "ethdev_driver.h"
#include "ethdev_private.h"
enum eth_params {
RTE_ETH_PARAM_MAC,
RTE_ETH_PARAM_REPRESENTOR,
RTE_ETH_PARAM_MAX,
};
static const char * const eth_params_keys[] = {
[RTE_ETH_PARAM_MAC] = "mac",
[RTE_ETH_PARAM_REPRESENTOR] = "representor",
[RTE_ETH_PARAM_MAX] = NULL,
};
struct eth_dev_match_arg {
struct rte_device *device;
struct rte_kvargs *kvlist;
};
#define eth_dev_match_arg(d, k) \
(&(const struct eth_dev_match_arg) { \
.device = (d), \
.kvlist = (k), \
})
static int
eth_mac_cmp(const char *key __rte_unused,
const char *value, void *opaque)
{
struct rte_ether_addr mac;
const struct rte_eth_dev_data *data = opaque;
struct rte_eth_dev_info dev_info;
uint32_t index;
/* Parse devargs MAC address. */
if (rte_ether_unformat_addr(value, &mac) < 0)
return -1; /* invalid devargs value */
if (rte_eth_dev_info_get(data->port_id, &dev_info) != 0)
return -1; /* device MAC address unavailable */
/* Return 0 if devargs MAC is matching one of the device MACs. */
for (index = 0; index < dev_info.max_mac_addrs; index++)
if (rte_is_same_ether_addr(&mac, &data->mac_addrs[index]))
return 0;
return -1; /* no match */
}
static int
eth_representor_cmp(const char *key __rte_unused,
const char *value, void *opaque)
{
int ret;
char *values;
const struct rte_eth_dev *edev = opaque;
const struct rte_eth_dev_data *data = edev->data;
struct rte_eth_devargs eth_da;
uint16_t id = 0, nc, np, nf, i, c, p, f;
if (!rte_eth_dev_is_repr(edev))
return -1; /* not a representor port */
/* Parse devargs representor values. */
values = strdup(value);
if (values == NULL)
return -1;
memset(ð_da, 0, sizeof(eth_da));
ret = rte_eth_devargs_parse_representor_ports(values, ð_da);
free(values);
if (ret != 0)
return -1; /* invalid devargs value */
if (eth_da.nb_mh_controllers == 0 && eth_da.nb_ports == 0 &&
eth_da.nb_representor_ports == 0)
return -1;
nc = eth_da.nb_mh_controllers > 0 ? eth_da.nb_mh_controllers : 1;
np = eth_da.nb_ports > 0 ? eth_da.nb_ports : 1;
nf = eth_da.nb_representor_ports > 0 ? eth_da.nb_representor_ports : 1;
/* Return 0 if representor ID is matching one of the values. */
for (i = 0; i < nc * np * nf; ++i) {
c = i / (np * nf);
p = (i / nf) % np;
f = i % nf;
if (rte_eth_representor_id_get(edev->data->backer_port_id,
eth_da.type,
eth_da.nb_mh_controllers == 0 ? -1 :
eth_da.mh_controllers[c],
eth_da.nb_ports == 0 ? -1 : eth_da.ports[p],
eth_da.nb_representor_ports == 0 ? -1 :
eth_da.representor_ports[f],
&id) < 0)
continue;
if (data->representor_id == id)
return 0;
}
return -1; /* no match */
}
static int
eth_dev_match(const struct rte_eth_dev *edev,
const void *_arg)
{
int ret;
const struct eth_dev_match_arg *arg = _arg;
const struct rte_kvargs *kvlist = arg->kvlist;
unsigned int pair;
if (edev->state == RTE_ETH_DEV_UNUSED)
return -1;
if (arg->device != NULL && arg->device != edev->device)
return -1;
ret = rte_kvargs_process(kvlist,
eth_params_keys[RTE_ETH_PARAM_MAC],
eth_mac_cmp, edev->data);
if (ret != 0)
return -1;
ret = rte_kvargs_process(kvlist,
eth_params_keys[RTE_ETH_PARAM_REPRESENTOR],
eth_representor_cmp, (void *)(uintptr_t)edev);
if (ret != 0)
return -1;
/* search for representor key */
for (pair = 0; pair < kvlist->count; pair++) {
ret = strcmp(kvlist->pairs[pair].key,
eth_params_keys[RTE_ETH_PARAM_REPRESENTOR]);
if (ret == 0)
break; /* there is a representor key */
}
/* if no representor key, default is to not match representor ports */
if (ret != 0)
if (rte_eth_dev_is_repr(edev))
return -1; /* do not match any representor */
return 0;
}
static void *
eth_dev_iterate(const void *start,
const char *str,
const struct rte_dev_iterator *it)
{
struct rte_kvargs *kvargs = NULL;
struct rte_eth_dev *edev = NULL;
const char * const *valid_keys = NULL;
if (str != NULL) {
if (str[0] == '+') /* no validation of keys */
str++;
else
valid_keys = eth_params_keys;
kvargs = rte_kvargs_parse(str, valid_keys);
if (kvargs == NULL) {
RTE_ETHDEV_LOG_LINE(ERR, "cannot parse argument list");
rte_errno = EINVAL;
return NULL;
}
}
edev = eth_find_device(start, eth_dev_match,
eth_dev_match_arg(it->device, kvargs));
rte_kvargs_free(kvargs);
return edev;
}
static struct rte_class rte_class_eth = {
.dev_iterate = eth_dev_iterate,
};
RTE_REGISTER_CLASS(eth, rte_class_eth);
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