From: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
To: Ian Munsie <imunsie@au1.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Michael Neuling <mikey@neuling.org>,
Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
linuxppc-dev@lists.ozlabs.org, Huy Nguyen <huyn@mellanox.com>
Subject: Re: [PATCH 11/14] cxl: Workaround PE=0 hardware limitation in Mellanox CX4
Date: Wed, 6 Jul 2016 20:42:36 +0200 [thread overview]
Message-ID: <577D511C.9050601@linux.vnet.ibm.com> (raw)
In-Reply-To: <1467638532-9250-12-git-send-email-imunsie@au.ibm.com>
Le 04/07/2016 15:22, Ian Munsie a écrit :
> From: Ian Munsie <imunsie@au1.ibm.com>
>
> The CX4 card cannot cope with a context with PE=0 due to a hardware
> limitation, resulting in:
>
> [ 34.166577] command failed, status limits exceeded(0x8), syndrome 0x5a7939
> [ 34.166580] mlx5_core 0000:01:00.1: Failed allocating uar, aborting
>
> Since the kernel API allocates a default context very early during
> device init that will almost certainly get Process Element ID 0 there is
> no easy way for us to extend the API to allow the Mellanox to inform us
> of this limitation ahead of time.
>
> Instead, work around the issue by extending the XSL structure to include
> a minimum PE to allocate. Although the bug is not in the XSL, it is the
> easiest place to work around this limitation given that the CX4 is
> currently the only card that uses an XSL.
>
> Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
next prev parent reply other threads:[~2016-07-06 18:42 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 13:21 powerpc / cxl: Add support for the Mellanox CX4 in cxl mode Ian Munsie
2016-07-04 13:21 ` [PATCH 01/14] powerpc/powernv: Split cxl code out into a separate file Ian Munsie
2016-07-06 3:44 ` Andrew Donnellan
2016-07-06 16:27 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 02/14] cxl: Add cxl_slot_is_supported API Ian Munsie
2016-07-06 2:02 ` Andrew Donnellan
2016-07-06 16:36 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 03/14] cxl: Enable bus mastering for devices using CAPP DMA mode Ian Munsie
2016-07-06 4:04 ` Andrew Donnellan
2016-07-06 16:37 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 04/14] cxl: Move cxl_afu_get / cxl_afu_put to base Ian Munsie
2016-07-05 2:10 ` Andrew Donnellan
2016-07-06 16:45 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 05/14] cxl: Allow a default context to be associated with an external pci_dev Ian Munsie
2016-07-06 16:51 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 06/14] powerpc/powernv: Add support for the cxl kernel api on the real phb Ian Munsie
2016-07-06 17:38 ` Frederic Barrat
2016-07-07 6:28 ` Ian Munsie
2016-07-04 13:22 ` [PATCH 07/14] cxl: Add support for using the kernel API with a real PHB Ian Munsie
2016-07-06 17:39 ` Frederic Barrat
2016-07-06 18:30 ` Frederic Barrat
2016-07-07 6:32 ` Ian Munsie
2016-07-04 13:22 ` [PATCH 08/14] cxl: Add kernel APIs to get & set the max irqs per context Ian Munsie
2016-07-06 18:11 ` Frederic Barrat
2016-07-07 6:00 ` Ian Munsie
2016-07-04 13:22 ` [PATCH 09/14] cxl: Add preliminary workaround for CX4 interrupt limitation Ian Munsie
2016-07-06 18:34 ` Frederic Barrat
2016-07-04 13:22 ` [PATCH 10/14] cxl: Add support for interrupts on the Mellanox CX4 Ian Munsie
2016-07-06 18:41 ` Frederic Barrat
2016-07-07 6:03 ` Ian Munsie
2016-07-04 13:22 ` [PATCH 11/14] cxl: Workaround PE=0 hardware limitation in " Ian Munsie
2016-07-06 4:42 ` Andrew Donnellan
2016-07-06 18:42 ` Frederic Barrat [this message]
2016-07-04 13:22 ` [PATCH 12/14] PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl Ian Munsie
2016-07-05 0:03 ` Gavin Shan
2016-07-05 1:08 ` Andrew Donnellan
2016-07-04 13:22 ` [PATCH 13/14] PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state Ian Munsie
2016-07-04 13:22 ` [PATCH 14/14] cxl: Add cxl_check_and_switch_mode() API to switch bi-modal cards Ian Munsie
2016-07-06 3:55 ` Andrew Donnellan
2016-07-06 18:51 ` Frederic Barrat
2016-07-07 1:18 ` Andrew Donnellan
2016-07-07 6:26 ` Ian Munsie
2016-07-07 6:44 ` Andrew Donnellan
2016-07-07 8:15 ` Andrew Donnellan
2016-07-11 9:19 ` Ian Munsie
2016-07-12 1:20 ` Andrew Donnellan
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=577D511C.9050601@linux.vnet.ibm.com \
--to=fbarrat@linux.vnet.ibm.com \
--cc=andrew.donnellan@au1.ibm.com \
--cc=huyn@mellanox.com \
--cc=imunsie@au1.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mikey@neuling.org \
--cc=mpe@ellerman.id.au \
/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.