From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
linux-pci@vger.kernel.org, ckoenig.leichtzumerken@gmail.com,
daniel.vetter@ffwll.ch, Harry.Wentland@amd.com
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>,
gregkh@linuxfoundation.org, Felix.Kuehling@amd.com,
ppaalanen@gmail.com, helgaas@kernel.org,
Alexander.Deucher@amd.com
Subject: [PATCH v6 16/16] drm/amdgpu: Verify DMA opearations from device are done
Date: Mon, 10 May 2021 12:36:25 -0400 [thread overview]
Message-ID: <20210510163625.407105-17-andrey.grodzovsky@amd.com> (raw)
In-Reply-To: <20210510163625.407105-1-andrey.grodzovsky@amd.com>
In case device remove is just simualted by sysfs then verify
device doesn't keep doing DMA to the released memory after
pci_remove is done.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 83006f45b10b..5e6af9e0b7bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev)
drm_dev_unplug(dev);
amdgpu_driver_unload_kms(dev);
+ /*
+ * Flush any in flight DMA operations from device.
+ * Clear the Bus Master Enable bit and then wait on the PCIe Device
+ * StatusTransactions Pending bit.
+ */
pci_disable_device(pdev);
+ pci_wait_for_pending_transaction(pdev);
}
static void
--
2.25.1
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
next prev parent reply other threads:[~2021-05-10 16:37 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 16:36 [PATCH v6 00/16] RFC Support hot device unplug in amdgpu Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 01/16] drm/ttm: Remap all page faults to per process dummy page Andrey Grodzovsky
2021-05-11 6:38 ` Christian König
2021-05-11 14:44 ` Andrey Grodzovsky
2021-05-11 15:12 ` Christian König
2021-05-10 16:36 ` [PATCH v6 02/16] drm/ttm: Expose ttm_tt_unpopulate for driver use Andrey Grodzovsky
2021-05-10 18:27 ` Felix Kuehling
2021-05-10 18:32 ` Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 03/16] drm/amdgpu: Split amdgpu_device_fini into early and late Andrey Grodzovsky
2021-05-10 23:49 ` kernel test robot
2021-05-10 16:36 ` [PATCH v6 04/16] drm/amdkfd: Split kfd suspend from devie exit Andrey Grodzovsky
2021-05-11 6:40 ` Christian König
2021-05-11 14:52 ` Andrey Grodzovsky
2021-05-11 13:24 ` Deucher, Alexander
2021-05-10 16:36 ` [PATCH v6 05/16] drm/amdgpu: Add early fini callback Andrey Grodzovsky
2021-05-11 6:41 ` Christian König
2021-05-10 16:36 ` [PATCH v6 06/16] drm/amdgpu: Handle IOMMU enabled case Andrey Grodzovsky
2021-05-11 6:44 ` Christian König
2021-05-11 15:46 ` Andrey Grodzovsky
2021-05-11 15:56 ` Alex Deucher
2021-05-11 15:59 ` Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 07/16] drm/amdgpu: Remap all page faults to per process dummy page Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 08/16] PCI: Add support for dev_groups to struct pci_device_driver Andrey Grodzovsky
2021-05-10 20:56 ` Bjorn Helgaas
2021-05-10 16:36 ` [PATCH v6 09/16] drm/amdgpu: Convert driver sysfs attributes to static attributes Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 10/16] drm/amdgpu: Guard against write accesses after device removal Andrey Grodzovsky
2021-05-11 6:50 ` Christian König
2021-05-11 17:52 ` Andrey Grodzovsky
2021-05-12 14:01 ` Andrey Grodzovsky
2021-05-12 14:06 ` Christian König
2021-05-12 14:11 ` Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 11/16] drm/sched: Make timeout timer rearm conditional Andrey Grodzovsky
2021-05-11 6:52 ` Christian König
2021-05-10 16:36 ` [PATCH v6 12/16] drm/amdgpu: Prevent any job recoveries after device is unplugged Andrey Grodzovsky
2021-05-11 6:53 ` Christian König
2021-05-10 16:36 ` [PATCH v6 13/16] drm/amdgpu: Fix hang on device removal Andrey Grodzovsky
2021-05-11 6:54 ` Christian König
2021-05-10 16:36 ` [PATCH v6 14/16] drm/scheduler: Fix hang when sched_entity released Andrey Grodzovsky
2021-05-10 16:36 ` [PATCH v6 15/16] drm/amd/display: Remove superflous drm_mode_config_cleanup Andrey Grodzovsky
2021-05-10 21:38 ` Rodrigo Siqueira
2021-05-10 16:36 ` Andrey Grodzovsky [this message]
2021-05-11 6:56 ` [PATCH v6 16/16] drm/amdgpu: Verify DMA opearations from device are done Christian König
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=20210510163625.407105-17-andrey.grodzovsky@amd.com \
--to=andrey.grodzovsky@amd.com \
--cc=Alexander.Deucher@amd.com \
--cc=Felix.Kuehling@amd.com \
--cc=Harry.Wentland@amd.com \
--cc=amd-gfx@lists.freedesktop.org \
--cc=ckoenig.leichtzumerken@gmail.com \
--cc=daniel.vetter@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=helgaas@kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=ppaalanen@gmail.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).