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From: Bruce Richardson <bruce.richardson@intel.com>
To: Kumar Amber <kumar.amber@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v7] raw/ioat: add secondary process support
Date: Thu, 7 Jan 2021 12:37:35 +0000
Message-ID: <20210107123735.GA210@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <20210107122312.564619-1-kumar.amber@intel.com>

On Thu, Jan 07, 2021 at 05:53:12PM +0530, Kumar Amber wrote:
> Add support for secondary processes in ioat devices. The update
> allocates a memzone for a primary process or returns it in a
> secondary process.
> 
> Signed-off-by: Kumar Amber <kumar.amber@intel.com>
> 
> ---
> v5
> * add error check for memzone lookup
> v6
> * fix compilation
> v7
> * include dev ops for secondary
> ---

Two comments below. With those fixed, you can add my ack to v8.

Acked-by: Bruce Richardson <bruce.richardson@intel.com>

>  drivers/raw/ioat/ioat_common.c | 22 ++++++++++++++++++++--
>  drivers/raw/ioat/ioat_rawdev.c | 21 +++++++++++++++++++--
>  2 files changed, 39 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/raw/ioat/ioat_common.c b/drivers/raw/ioat/ioat_common.c
> index 142e171bc9..2428c8a5b6 100644
> --- a/drivers/raw/ioat/ioat_common.c
> +++ b/drivers/raw/ioat/ioat_common.c
> @@ -215,14 +215,32 @@ idxd_rawdev_create(const char *name, struct rte_device *dev,
>  		goto cleanup;
>  	}
>  
> +	/* Allocate memory for the primary process or else return the memory
> +	 * of primary memzone for the secondary process.
> +	 */
>  	snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
> -	mz = rte_memzone_reserve(mz_name, sizeof(struct idxd_rawdev),
> -			dev->numa_node, RTE_MEMZONE_IOVA_CONTIG);

This line actually doesn't need to be changed, and in doing so, it's
actually introduced a bug. The sizeof() call here, has "idxd_rawdev" while
the replacement below is a copy-paste error using "ioat_rawdev".

> +	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
> +		mz = rte_memzone_lookup(mz_name);
> +		if (mz == NULL) {
> +			IOAT_PMD_ERR("Unable lookup memzone for private data\n");
> +			ret = -ENOMEM;
> +			goto cleanup;
> +		}
> +		rawdev->dev_private = mz->addr;
> +		rawdev->dev_ops = ops;
> +		rawdev->device = dev;
> +		return 0;
> +	}
> +	mz = rte_memzone_reserve(mz_name,
> +			sizeof(struct rte_ioat_rawdev),
> +			dev->numa_node,
> +			RTE_MEMZONE_IOVA_CONTIG);
>  	if (mz == NULL) {
>  		IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
>  		ret = -ENOMEM;
>  		goto cleanup;
>  	}
> +
>  	rawdev->dev_private = mz->addr;
>  	rawdev->dev_ops = ops;
>  	rawdev->device = dev;
> diff --git a/drivers/raw/ioat/ioat_rawdev.c b/drivers/raw/ioat/ioat_rawdev.c
> index 2c88b4369f..e152004219 100644
> --- a/drivers/raw/ioat/ioat_rawdev.c
> +++ b/drivers/raw/ioat/ioat_rawdev.c
> @@ -165,9 +165,26 @@ ioat_rawdev_create(const char *name, struct rte_pci_device *dev)
>  		goto cleanup;
>  	}
>  
> +	/* Allocate memory for the primary process or else return the memory
> +	 * of primary memzone for the secondary process.
> +	 */
>  	snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
> -	mz = rte_memzone_reserve(mz_name, sizeof(struct rte_ioat_rawdev),
> -			dev->device.numa_node, RTE_MEMZONE_IOVA_CONTIG);

No bug introduced here, but again I think changing this line is
unnecessary.

> +	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
> +		mz = rte_memzone_lookup(mz_name);
> +		if (mz == NULL) {
> +			IOAT_PMD_ERR("Unable lookup memzone for private data\n");
> +			ret = -ENOMEM;
> +			goto cleanup;
> +		}
> +		rawdev->dev_private = mz->addr;
> +		rawdev->dev_ops = &ioat_rawdev_ops;
> +		rawdev->device = &dev->device;
> +		return 0;
> +	}
> +	mz = rte_memzone_reserve(mz_name,
> +			sizeof(struct rte_ioat_rawdev),
> +			dev->device.numa_node,
> +			RTE_MEMZONE_IOVA_CONTIG);
>  	if (mz == NULL) {
>  		IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
>  		ret = -ENOMEM;
> -- 
> 2.25.1
> 

  reply	other threads:[~2021-01-07 12:37 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-21  2:09 [dpdk-dev] [PATCH v1] " Kumar Amber
2021-01-04 13:31 ` [dpdk-dev] [PATCH v2] " Kumar Amber
2021-01-04 16:28   ` [dpdk-dev] [PATCH v3] " Kumar Amber
2021-01-04 16:30     ` [dpdk-dev] [PATCH v4] " Kumar Amber
2021-01-06 14:07       ` Bruce Richardson
2021-01-07  4:00       ` [dpdk-dev] [PATCH v5] " Kumar Amber
2021-01-07  5:05         ` [dpdk-dev] [PATCH v6] " Kumar Amber
2021-01-07 12:23           ` [dpdk-dev] [PATCH v7] " Kumar Amber
2021-01-07 12:37             ` Bruce Richardson [this message]
2021-01-08 13:44             ` [dpdk-dev] [PATCH v8] " Kumar Amber
2021-01-08 14:03               ` Bruce Richardson
2021-01-08 16:08               ` [dpdk-dev] [PATCH v9] " Kumar Amber
2021-01-08 16:52                 ` Kumar Amber
2021-01-08 17:05                   ` Bruce Richardson
2021-01-17 21:53                     ` Thomas Monjalon

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