[PATCH 5/7] drm/amdgpu: don't disable MSI for GPU virtual function

[Ding, Pixel]

Sorry for the misunderstanding. Will test with similar fix instead of 5248e3d9 directly later.

—
Sincerely Yours,
Pixel







On 24/10/2017, 9:31 AM, "Ding, Pixel" <Pixel.Ding at amd.com> wrote:

>Tested with 5248e3d9, however issue is still reproduced in reinit case.
>
>+Jack,
>To bypass MSI enable/disable for reinit, any comment?
>— 
>Sincerely Yours,
>Pixel
>
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>On 23/10/2017, 6:57 PM, "Liu, Monk" <Monk.Liu at amd.com> wrote:
>
>>Please check commit "5248e3d9", your issue should already be fixed by that patch, please verify
>>
>>-----Original Message-----
>>From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Pixel Ding
>>Sent: 2017年10月23日 18:04
>>To: amd-gfx at lists.freedesktop.org
>>Cc: Sun, Gary <Gary.Sun at amd.com>; Ding, Pixel <Pixel.Ding at amd.com>; Li, Bingley <Bingley.Li at amd.com>
>>Subject: [PATCH 5/7] drm/amdgpu: don't disable MSI for GPU virtual function
>>
>>From: pding <Pixel.Ding at amd.com>
>>
>>After calling pci_disable_msi() and pci_enable_msi(), VF can't receive interrupt anymore. This may introduce problems in module reloading or retrying init.
>>
>>Signed-off-by: pding <Pixel.Ding at amd.com>
>>---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 5 ++---
>> 1 file changed, 2 insertions(+), 3 deletions(-)
>>
>>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>index c2d8255..a3314b5 100644
>>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>@@ -229,8 +229,7 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
>> 	adev->irq.msi_enabled = false;
>> 
>> 	if (amdgpu_msi_ok(adev)) {
>>-		int ret = pci_enable_msi(adev->pdev);
>>-		if (!ret) {
>>+		if (adev->pdev->msi_enabled || !pci_enable_msi(adev->pdev)) {
>> 			adev->irq.msi_enabled = true;
>> 			INIT_DEV_INFO(adev->dev, "amdgpu: using MSI.\n");
>> 		}
>>@@ -280,7 +279,7 @@ void amdgpu_irq_fini(struct amdgpu_device *adev)
>> 	if (adev->irq.installed) {
>> 		drm_irq_uninstall(adev->ddev);
>> 		adev->irq.installed = false;
>>-		if (adev->irq.msi_enabled)
>>+		if (adev->irq.msi_enabled && !amdgpu_sriov_vf(adev))
>> 			pci_disable_msi(adev->pdev);
>> 		flush_work(&adev->hotplug_work);
>> 		cancel_work_sync(&adev->reset_work);
>>--
>>2.9.5
>>
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