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From: Christoph Hellwig <hch@lst.de>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Christoph Hellwig <hch@lst.de>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: pci-usb/pci-sata broken with LPAE config after "reduce use of block bounce buffers"
Date: Fri, 15 Nov 2019 14:06:54 +0100	[thread overview]
Message-ID: <20191115130654.GA3414@lst.de> (raw)
In-Reply-To: <120f7c3e-363d-deb0-a347-782ac869ee0d@ti.com>

On Fri, Nov 15, 2019 at 04:29:31PM +0530, Kishon Vijay Abraham I wrote:
> Hi Christoph,
> 
> I think we are encountering a case where the connected PCIe card (like PCIe USB
> card) supports 64-bit addressing and the ARM core supports 64-bit addressing
> but the PCIe controller in the SoC to which PCIe card is connected supports
> only 32-bits.
> 
> Here dma APIs can provide an address above the 32 bit region to the PCIe card.
> However this will fail when the card tries to access the provided address via
> the PCIe controller.

What kernel version did you see your problems with?

Linux 5.3 added swiotlb to arm LPAE configs for exactly that case.

  reply	other threads:[~2019-11-15 13:06 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-15 10:59 pci-usb/pci-sata broken with LPAE config after "reduce use of block bounce buffers" Kishon Vijay Abraham I
2019-11-15 13:06 ` Christoph Hellwig [this message]
2019-11-15 14:18   ` Kishon Vijay Abraham I
2019-11-16 16:35     ` Christoph Hellwig
2019-11-18 17:21       ` Robin Murphy
2019-11-25  5:43         ` Kishon Vijay Abraham I
2020-01-27 13:10           ` Kishon Vijay Abraham I
2020-01-27 13:22             ` Robin Murphy
2020-01-29  6:24               ` Kishon Vijay Abraham I
2020-01-30  7:58 ` Christoph Hellwig
2020-01-30  8:09   ` Kishon Vijay Abraham I
2020-01-30 16:42     ` Christoph Hellwig
2020-01-31 11:44       ` Kishon Vijay Abraham I
2020-02-03 14:21         ` Christoph Hellwig
2020-02-05  5:15           ` Kishon Vijay Abraham I
2020-02-05  7:47             ` Christoph Hellwig
2020-02-05  8:32               ` Kishon Vijay Abraham I
2020-02-05  8:48                 ` Christoph Hellwig
2020-02-05  9:18                   ` Kishon Vijay Abraham I
2020-02-05  9:19                     ` Christoph Hellwig
2020-02-05  9:33                       ` Kishon Vijay Abraham I
2020-02-05 16:05                         ` Christoph Hellwig
2020-02-17 14:23                           ` Christoph Hellwig
2020-02-18 12:15                             ` Kishon Vijay Abraham I
2020-04-02 12:01                               ` Kishon Vijay Abraham I

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