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From: Avi Kivity <avi@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
	joerg.roedel@amd.com, agraf@suse.de, qemu-devel@nongnu.org,
	eduard.munteanu@linux360.ro, rth@twiddle.net,
	David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] [PATCH 01/10] Add stub functions for PCI device models to do PCI DMA
Date: Fri, 02 Sep 2011 11:37:25 +0300	[thread overview]
Message-ID: <4E6095C5.7050500@redhat.com> (raw)
In-Reply-To: <4E5FAD5C.4090208@codemonkey.ws>

On 09/01/2011 07:05 PM, Anthony Liguori wrote:
>
> The challenge is what you do about something like ne2k where the core 
> chipset can either be a PCI device or an ISA device.  You would have 
> to implement a wrapper around pci_dma_rw() in order to turn it into 
> cpu_physical_memory_rw when doing ISA.

btw, ISA DMA is very different, no?  You program a dma controller to 
copy memory from the device to RAM (or vice versa); the device never 
initiates a transaction IIRC.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

  parent reply	other threads:[~2011-09-02  8:37 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-01  5:00 [Qemu-devel] [0/10] Preliminary work for IOMMU emulation support; the easy bits David Gibson
2011-09-01  5:00 ` [Qemu-devel] [PATCH 01/10] Add stub functions for PCI device models to do PCI DMA David Gibson
2011-09-01 15:35   ` Michael S. Tsirkin
2011-09-02  0:39     ` David Gibson
2011-09-02  4:38     ` David Gibson
2011-09-05  7:55       ` Michael S. Tsirkin
2011-09-01 15:55   ` Anthony Liguori
2011-09-01 16:03     ` Avi Kivity
2011-09-01 16:05       ` Anthony Liguori
2011-09-01 16:11         ` Avi Kivity
2011-09-01 16:32           ` Anthony Liguori
2011-09-02  8:35             ` Avi Kivity
2011-09-03 12:25               ` Blue Swirl
2011-09-02  0:38         ` David Gibson
2011-09-02  8:37         ` Avi Kivity [this message]
2011-09-03  3:04           ` Eduard - Gabriel Munteanu
2011-09-02  4:40       ` David Gibson
2011-09-03  1:16     ` Richard Henderson
2011-09-23 16:37   ` Anthony Liguori
2011-09-01  5:00 ` [Qemu-devel] [PATCH 02/10] rtl8139: Use PCI DMA stub functions David Gibson
2011-09-01  5:00 ` [Qemu-devel] [PATCH 03/10] eepro100: " David Gibson
2011-09-01  5:00 ` [Qemu-devel] [PATCH 04/10] ac97: " David Gibson
2011-09-01  5:00 ` [Qemu-devel] [PATCH 05/10] es1370: " David Gibson
2011-09-01  5:00 ` [Qemu-devel] [PATCH 06/10] e1000: " David Gibson
2011-09-01  5:01 ` [Qemu-devel] [PATCH 07/10] lsi53c895a: " David Gibson
2011-09-01  5:01 ` [Qemu-devel] [PATCH 08/10] pcnet-pci: " David Gibson
2011-09-01  5:01 ` [Qemu-devel] [PATCH 09/10] usb-ohci: " David Gibson
2011-09-01 10:10   ` Gerd Hoffmann
2011-09-02  1:47     ` David Gibson
2011-09-01  5:01 ` [Qemu-devel] [PATCH 10/10] intel-hda: " David Gibson
2011-09-01 10:16   ` Gerd Hoffmann
2011-09-02  1:42     ` David Gibson
2011-09-01 11:33 ` [Qemu-devel] [0/10] Preliminary work for IOMMU emulation support; the easy bits Eduard - Gabriel Munteanu
2011-09-02  0:36   ` David Gibson

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