Re: [PATCH v1] Change rte_eal_vdev_init to update port_id

[Tetsuya Mukawa <mukawa@igel.co.jp>]

On 2015/08/07 3:04, Ravi Kerur wrote:
> diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
> index 8280cea..472ef5a 100644
> --- a/drivers/net/enic/enic_ethdev.c
> +++ b/drivers/net/enic/enic_ethdev.c
> @@ -36,8 +36,8 @@
>  #include <stdio.h>
>  #include <stdint.h>
>  
> -#include <rte_dev.h>
>  #include <rte_pci.h>
> +#include <rte_dev.h>
>  #include <rte_ethdev.h>
>  #include <rte_string_fns.h>

Hi Ravi,

Do we need this fixing?

>  
> diff --git a/drivers/net/mpipe/mpipe_tilegx.c b/drivers/net/mpipe/mpipe_tilegx.c
> index 743feef..6e3e304 100644
> --- a/drivers/net/mpipe/mpipe_tilegx.c
> +++ b/drivers/net/mpipe/mpipe_tilegx.c
> @@ -1582,6 +1582,7 @@ rte_pmd_mpipe_devinit(const char *ifname,
>  	if (!eth_dev) {
>  		RTE_LOG(ERR, PMD, "%s: Failed to allocate device.\n", ifname);
>  		rte_free(priv);
> +		return -ENOMEM;

How about separating this fixing from the patch, and put it as an one of
cleanup patch series?

>  	}
>  
>  	RTE_LOG(INFO, PMD, "%s: Initialized mpipe device"
> diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
> index 4089d66..82d5693 100644
> --- a/lib/librte_eal/common/eal_common_dev.c
> +++ b/lib/librte_eal/common/eal_common_dev.c
>
>  	RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
> @@ -94,6 +99,7 @@ rte_eal_dev_init(void)
>  {
>  	struct rte_devargs *devargs;
>  	struct rte_driver *driver;
> +	uint8_t port_id;
>  
>  	/*
>  	 * Note that the dev_driver_list is populated here
> @@ -108,7 +114,7 @@ rte_eal_dev_init(void)
>  			continue;
>  
>  		if (rte_eal_vdev_init(devargs->virtual.drv_name,
> -					devargs->args)) {
> +					devargs->args, &port_id)) {

After this line, 'port_id' is actually not used by anywhere in this
function.
Also, I guess we will not use port_id in this function in the future.
How about fixing rte_eal_vdev_init() to handle NULL value correctly to
remove port_id from this function?
But I agree your current implementation is also one of choice.

> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index 5fe1906..355d709 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> +int
> +rte_eth_dev_get_port_by_addr(const struct rte_pci_addr *addr, uint8_t *port_id)
> +{
> +	int i;
> +	struct rte_pci_device *pci_dev = NULL;
> +
> +	if (addr == NULL || port_id == NULL) {
> +		PMD_DEBUG_TRACE("Null pointer is specified\n");
> +		return -EINVAL;
> +	}
> +
> +	*port_id = RTE_MAX_ETHPORTS;
> +
> +	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
> +
> +		pci_dev = rte_eth_devices[i].pci_dev;
> +
> +		if (pci_dev != NULL &&
> +			pci_dev->addr.domain == addr->domain &&
> +			pci_dev->addr.bus == addr->bus &&
> +			pci_dev->addr.devid == addr->devid &&
> +			pci_dev->addr.function == addr->function) {

You can use rte_eal_compare_pci_addr() here.

> +
> +			*port_id = i;
> +			return 0;
> +		}
> +	}
> +	return -ENODEV;
> +}
> diff --git a/lib/librte_ether/rte_ether_version.map b/lib/librte_ether/rte_ether_version.map
> index 8345a6c..3d5cb23 100644
> --- a/lib/librte_ether/rte_ether_version.map
> +++ b/lib/librte_ether/rte_ether_version.map
> @@ -125,5 +125,7 @@ DPDK_2.1 {
>  	rte_eth_timesync_enable;
>  	rte_eth_timesync_read_rx_timestamp;
>  	rte_eth_timesync_read_tx_timestamp;
> +	rte_eth_dev_get_port_by_name;
> +	rte_eth_dev_get_port_by_addr;
>  
>  } DPDK_2.0;

Hi Thomas,

Could you please make sure API consistency?
Is it ok to add above functions to DPDK_2.1 even though we are in RC
phase, or need to add to DPDK_2.2?

Thanks,
Tetsuya