From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: [Patch v2 7/9] iommu/amd: copy old tables and do not update dev tables before driver init
Date: Wed, 16 Dec 2015 16:51:34 +0100 [thread overview]
Message-ID: <20151216155133.GJ18805@8bytes.org> (raw)
In-Reply-To: <20151213011929.GA2490-ejN7fcUYdH/by3iVrkZq2A@public.gmane.org>
Hi Baoquan,
On Sun, Dec 13, 2015 at 09:19:29AM +0800, Baoquan He wrote:
>From definition and usage for other arch/component set_dma_mask is only
> used to set the DMA addressing limitations which is I got from reading.
> Could you please give more tips on this? Maybe I didn't dig into it deep
> enough to get it.
The device drivers usually call set_dma_mask before they issue any other
dma-api call. So they call it at driver-init time, making the call-back
a good indication that a driver is about to grab a device. As a bonus we
also get the dma-mask and can make choices on how to initialize the
device. But that is out-of-scope for this patch-set.
Joerg
next prev parent reply other threads:[~2015-12-16 15:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-06 12:10 [Patch v2 0/9] Fix AMD IOMMU faults in kdump kernel Baoquan He
[not found] ` <1446811851-20623-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-06 12:10 ` [Patch v2 1/9] iommu/amd: Use standard bitmap operation to set bitmap Baoquan He
2015-11-06 12:10 ` [Patch v2 2/9] iommu/amd: Detect pre enabled translation Baoquan He
[not found] ` <1446811851-20623-3-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:03 ` Joerg Roedel
[not found] ` <20151127110312.GA24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 11:18 ` Baoquan He
2015-11-06 12:10 ` [Patch v2 3/9] iommu/amd: make several functions globally seen Baoquan He
[not found] ` <1446811851-20623-4-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:06 ` Joerg Roedel
[not found] ` <20151127110609.GB24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 11:31 ` Baoquan He
2015-11-06 12:10 ` [Patch v2 4/9] iommu/amd: add copy_irq_table function Baoquan He
[not found] ` <1446811851-20623-5-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:13 ` Joerg Roedel
[not found] ` <20151127111312.GC24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 11:49 ` Baoquan He
2015-11-06 12:10 ` [Patch v2 5/9] iommu/amd: Add function copy_dev_tables Baoquan He
[not found] ` <1446811851-20623-6-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:21 ` Joerg Roedel
[not found] ` <20151127112152.GD24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 11:59 ` Baoquan He
2015-11-06 12:10 ` [Patch v2 6/9] iommu/amd: Add functions copy_command_buffer/copy_event_buffer Baoquan He
[not found] ` <1446811851-20623-7-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:24 ` Joerg Roedel
[not found] ` <20151127112446.GE24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 12:02 ` Baoquan He
2015-11-06 12:10 ` [Patch v2 7/9] iommu/amd: copy old tables and do not update dev tables before driver init Baoquan He
[not found] ` <1446811851-20623-8-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-11-27 11:35 ` Joerg Roedel
[not found] ` <20151127113517.GF24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 12:13 ` Baoquan He
2015-12-13 1:19 ` Baoquan He
[not found] ` <20151213011929.GA2490-ejN7fcUYdH/by3iVrkZq2A@public.gmane.org>
2015-12-16 15:51 ` Joerg Roedel [this message]
2015-11-06 12:10 ` [Patch v2 8/9] iommu/amd: Do not update the information of domain to devtables before device " Baoquan He
2015-11-06 12:10 ` [Patch v2 9/9] iommu/amd: Clear the iommu pre enabled setting Baoquan He
2015-11-06 12:14 ` [Patch v2 0/9] Fix AMD IOMMU faults in kdump kernel Baoquan He
2015-11-18 6:14 ` Baoquan He
2015-11-27 11:38 ` Joerg Roedel
[not found] ` <20151127113816.GG24300-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-11-30 11:16 ` Baoquan He
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20151216155133.GJ18805@8bytes.org \
--to=joro-zlv9swrftaidnm+yrofe0a@public.gmane.org \
--cc=bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.