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References: <1623763327-30987-1-git-send-email-fengchengwen@huawei.com>
In-Reply-To: <1623763327-30987-1-git-send-email-fengchengwen@huawei.com>
From: David Marchand <david.marchand@redhat.com>
Date: Wed, 16 Jun 2021 14:14:54 +0200
Message-ID: <CAJFAV8wK99+jbqhWt=DzcQR3=O=JDEMh1wi8enQDqrBU0xhQHw@mail.gmail.com>
To: Chengwen Feng <fengchengwen@huawei.com>
Cc: Thomas Monjalon <thomas@monjalon.net>, "Yigit,
Ferruh" <ferruh.yigit@intel.com>, dev <dev@dpdk.org>,
Nipun Gupta <nipun.gupta@nxp.com>, Hemant Agrawal <hemant.agrawal@nxp.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
Bruce Richardson <bruce.richardson@intel.com>,
Jerin Jacob <jerinjacobk@gmail.com>
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Subject: Re: [dpdk-dev] [RFC PATCH] dmadev: introduce DMA device library
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On Tue, Jun 15, 2021 at 3:25 PM Chengwen Feng <fengchengwen@huawei.com> wrote:
> +
> +#define RTE_DMADEV_NAME_MAX_LEN (64)
> +/**< @internal Max length of name of DMA PMD */
> +
> +/** @internal
> + * The data structure associated with each DMA device.
> + */
> +struct rte_dmadev {
> + /**< Device ID for this instance */
> + uint16_t dev_id;
> + /**< Functions exported by PMD */
> + const struct rte_dmadev_ops *dev_ops;
> + /**< Device info. supplied during device initialization */
> + struct rte_device *device;
> + /**< Driver info. supplied by probing */
> + const char *driver_name;
> +
> + /**< Device name */
> + char name[RTE_DMADEV_NAME_MAX_LEN];
> +} __rte_cache_aligned;
> +
I see no queue/channel notion.
How does a rte_dmadev object relate to a physical hw engine?
--
David Marchand