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From: Andrew Lunn <andrew@lunn.ch>
To: Vadym Kochan <vadym.kochan@plvision.eu>
Cc: David Miller <davem@davemloft.net>,
	kuba@kernel.org, jiri@mellanox.com, idosch@mellanox.com,
	oleksandr.mazur@plvision.eu, serhiy.boiko@plvision.eu,
	serhiy.pshyk@plvision.eu, volodymyr.mytnyk@plvision.eu,
	taras.chornyi@plvision.eu, andrii.savka@plvision.eu,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	andy.shevchenko@gmail.com, mickeyr@marvell.com
Subject: Re: [net-next v5 1/6] net: marvell: prestera: Add driver for Prestera family ASIC devices
Date: Wed, 26 Aug 2020 15:04:41 +0200	[thread overview]
Message-ID: <20200826130441.GR2403519@lunn.ch> (raw)
In-Reply-To: <20200826081744.GA2729@plvision.eu>

> There is a limitation on the DMA range. Current device can't handle
> whole ZONE_DMA range, so there is a "backup" mechanism which copies the
> entire packet if the mapping was failed or if the packet's mapped
> address is out of this range, this is done on both rx and tx directions.

If you use the DMA API correct, it should hide all this, and do the
bounce buffers for you. But i'm no DMA expert...

       Andrew

  reply	other threads:[~2020-08-26 13:05 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-25 12:20 [net-next v5 0/6] net: marvell: prestera: Add Switchdev driver for Prestera family ASIC device 98DX326x (AC3x) Vadym Kochan
2020-08-25 12:20 ` [net-next v5 1/6] net: marvell: prestera: Add driver for Prestera family ASIC devices Vadym Kochan
2020-08-26  0:20   ` David Miller
2020-08-26  8:17     ` Vadym Kochan
2020-08-26 13:04       ` Andrew Lunn [this message]
2020-08-26 14:34       ` David Miller
2020-08-30  7:49         ` Vadym Kochan
2020-08-25 12:20 ` [net-next v5 2/6] net: marvell: prestera: Add PCI interface support Vadym Kochan
2020-08-25 12:20 ` [net-next v5 3/6] net: marvell: prestera: Add basic devlink support Vadym Kochan
2020-08-25 12:20 ` [net-next v5 4/6] net: marvell: prestera: Add ethtool interface support Vadym Kochan
2020-08-25 12:20 ` [net-next v5 5/6] net: marvell: prestera: Add Switchdev driver implementation Vadym Kochan
2020-08-25 12:20 ` [net-next v5 6/6] dt-bindings: marvell,prestera: Add description for device-tree bindings Vadym Kochan
2020-08-26  4:30 ` [net-next v5 0/6] net: marvell: prestera: Add Switchdev driver for Prestera family ASIC device 98DX326x (AC3x) Chris Packham
2020-08-30  8:00   ` Vadym Kochan

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