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net/mlx5: add support for configuration through kvargs

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The intent is to replace the remaining compile-time options and environment
variables with a common mean of runtime configuration. This commit only
adds the kvargs handling code, subsequent commits will update the rest.

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
This commit is contained in:
Nélio Laranjeiro 2016-06-24 15:17:50 +02:00 committed by Bruce Richardson
parent 51a50a3d9b
commit e72dd09b61
2 changed files with 74 additions and 0 deletions
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1
drivers/net/mlx5/Makefile
View File

@ -54,6 +54,7 @@ DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += lib/librte_ether
DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += lib/librte_mbuf
DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += lib/librte_eal
DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += lib/librte_mempool
DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += lib/librte_kvargs
# Basic CFLAGS.
CFLAGS += -O3

73
drivers/net/mlx5/mlx5.c
View File

@ -37,6 +37,7 @@
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <net/if.h>
/* Verbs header. */
@ -57,6 +58,7 @@
#include <rte_ethdev.h>
#include <rte_pci.h>
#include <rte_common.h>
#include <rte_kvargs.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-pedantic"
#endif
@ -237,6 +239,71 @@ mlx5_dev_idx(struct rte_pci_addr *pci_addr)
return ret;
}
/**
* Verify and store value for device argument.
*
* @param[in] key
* Key argument to verify.
* @param[in] val
* Value associated with key.
* @param opaque
* User data.
*
* @return
* 0 on success, negative errno value on failure.
*/
static int
mlx5_args_check(const char *key, const char *val, void *opaque)
{
struct priv *priv = opaque;
/* No parameters are expected at the moment. */
(void)priv;
(void)val;
WARN("%s: unknown parameter", key);
return -EINVAL;
}
/**
* Parse device parameters.
*
* @param priv
* Pointer to private structure.
* @param devargs
* Device arguments structure.
*
* @return
* 0 on success, errno value on failure.
*/
static int
mlx5_args(struct priv *priv, struct rte_devargs *devargs)
{
const char **params = (const char *[]){
NULL,
};
struct rte_kvargs *kvlist;
int ret = 0;
int i;
if (devargs == NULL)
return 0;
/* Following UGLY cast is done to pass checkpatch. */
kvlist = rte_kvargs_parse(devargs->args, params);
if (kvlist == NULL)
return 0;
/* Process parameters. */
for (i = 0; (params[i] != NULL); ++i) {
if (rte_kvargs_count(kvlist, params[i])) {
ret = rte_kvargs_process(kvlist, params[i],
mlx5_args_check, priv);
if (ret != 0)
return ret;
}
}
rte_kvargs_free(kvlist);
return 0;
}
static struct eth_driver mlx5_driver;
/**
@ -408,6 +475,12 @@ mlx5_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
priv->port = port;
priv->pd = pd;
priv->mtu = ETHER_MTU;
err = mlx5_args(priv, pci_dev->devargs);
if (err) {
ERROR("failed to process device arguments: %s",
strerror(err));
goto port_error;
}
if (ibv_exp_query_device(ctx, &exp_device_attr)) {
ERROR("ibv_exp_query_device() failed");
goto port_error;