linux-kernel - Re: [PATCH] PCI: Add Ralink RT2800 broken INTx masking quirk

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Message-ID: <1339104327.26976.45.camel@ul30vt>
Date:	Thu, 07 Jun 2012 15:25:27 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	Andreas Hartmann <andihartmann@...19freenet.de>
Cc:	bhelgaas@...gle.com, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	jan.kiszka@...mens.com
Subject: Re: [PATCH] PCI: Add Ralink RT2800 broken INTx masking quirk

On Thu, 2012-06-07 at 23:01 +0200, Andreas Hartmann wrote:
> Alex Williamson wrote:
> > On Thu, 2012-06-07 at 08:18 +0200, Andreas Hartmann wrote:
> >> Hello Alex,
> >>
> >> what about a module parameter to achieve this behaviour manually by
> >> the user without recompiling? I fear, there are much more candidates
> >> out there needing this "feature".
> > 
> > Yeah, that's probably a good idea.  For debugging and letting users have
> > a workaround rather than any kind of regular use.  I'll add a nointxmask
> > to vfio-pci with a description indicating that if it fixes a device to
> > report it for quirking.
> 
> That's exactly what I meant.
> 
> 
> May I have please another question? 
> Unfortunately I can't cleanly unmount filesystems during shutdown with your 
> kernel (this problem doesn't happen with the patched 3.4 suse kernel).

Hmm, are you using my kernel that's based on the next branch?  Could be
any number of things broken in next.

> I applied your vfio-patches from your git-repository to an openSUSE 3.4 
> kernel (plus one other to get the patches applied):
> 
> iommu_core:_pass_a_user-provided_token_to_fault_handlers.patch
> 0ca4120cbaeaa2aecdccc5043b309fe1808aae2a.patch [PATCH] pci: Add PCI DMA source ID quirk
> db47c1f7313ad863818261f62f1babaf0b564e55.patch [PATCH] pci: Add ACS validation utility
> a89edb6943102d4519860bca5671740c1b7364cc.patch [PATCH] pci: export pci_user functions for use by other drivers
> 38fdda7327b6cf50c1265a6332e94b97100aa10e.patch [PATCH] pci: Create common pcibios_err_to_errno
> cb6e045625e5a217df3cebcb4585b40cbcad6c96.patch [PATCH] pci: Misc pci_reg additions
> c6985f9b501903f5c707a1711fa53dc94c72f999.patch [PATCH] driver core: Add iommu_group tracking to struct device
> 581187e853620c52e4b78db643161cc3be2f3388.patch [PATCH] iommu: IOMMU Groups
> 635e48574089f4c8205a2fd7b1d85edd02344fe5.patch [PATCH] amd_iommu: Support IOMMU groups
> 37f2d6d5217fdd2facd9641b83fde683263adcaf.patch [PATCH] intel-iommu: Support IOMMU groups
> 351d849a51787140736e04f261ae9db09c980868.patch [PATCH] amd_iommu: Make use of DMA quirks and ACS checks in IOMMU
> 92eef0a72193ef8504eea10b4ccbdb2e1ee9f4b3.patch [PATCH] intel-iommu: Make use of DMA quirks and ACS checks in IOMMU groups
> dd2886fe0a8936d649a365162658406e7a18d274.patch [PATCH] iommu: Remove group_mf
> 6891b9a7d56841e592cfb444a7f4b2b02831f866.patch [PATCH] vfio: VFIO core
> 51b06ff680d8bc30d1bd627e2dd24641789be55d.patch [PATCH] vfio: Add documentation
> 4b36b306122a225d33e947e7f9e6d1117a4fb699.patch [PATCH] vfio: Type1 IOMMU implementation
> 91e4950e482b142dd9ab46f0ec386c5eed9f1470.patch [PATCH] vfio: Add PCI device driver
> PCI:_Mark_INTx_masking_support_of_Chelsio_T310_10GbE_NIC_as_broken.patch 
> PCI:_Add_Ralink_RT2800_broken_INTx_masking_quirk.patch 
> IRQF_ONESHOT.patch"
> 
> 
> The VM does work as expected, but fglrx isn't happy any
> more (but worked fine with your kernel and works fine, too, with the
> unpatched suse 3.4 kernel). fglrx says:

So you're saying:

kernel built from my tree: fglrx works
opensuse kernel: fglrx works
opensuse kernel + above patches: failure below?

> Jun  7 14:21:42 host kernel: [  105.103610] [fglrx:firegl_cail_init] *ERROR* CAIL: CAILInitialize failed, error 1
> Jun  7 14:21:42 host kernel: [  105.103613] [fglrx:hal_init_asic] *ERROR* Failed to initialize ASIC.
> Jun  7 14:21:42 host kernel: [  105.103645] [fglrx:firegl_init_pcie] *ERROR* Can not get FB size
> Jun  7 14:21:42 host kernel: [  105.103653] [fglrx:IRQMGR_alloc_context] *ERROR* IRQMGR_GetExtensionSize returned 0
> Jun  7 14:21:42 host kernel: [  105.103654] [fglrx:irqmgr_wrap_initialize] *ERROR* Fail to allocate IRQMGR context! 
> Jun  7 14:21:42 host kernel: [  105.109151] [fglrx:firegl_irq_enable] *ERROR* interrupt source ff000032 is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.109173] [fglrx:firegl_irq_enable] *ERROR* interrupt source 10000000 is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.169073] [fglrx:firegl_irq_enable] *ERROR* interrupt source 60000001 is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.169107] [fglrx:firegl_irq_enable] *ERROR* interrupt source ff00002c is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.169125] [fglrx:firegl_irq_enable] *ERROR* interrupt source ff00004e is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.169142] [fglrx:firegl_irq_enable] *ERROR* interrupt source 20000400 is not supported on this hardware (return code = 2)
> Jun  7 14:21:42 host kernel: [  105.172906] [fglrx:firegl_cmmqs_init] *ERROR* CMMQS init:GAL is not initialized.
> Jun  7 14:21:42 host kernel: [  105.172909] [fglrx:firegl_cmmqs_createdriver] *ERROR* CMMQS Initialization failed: firegl_cmmqs_createdriver
> Jun  7 14:21:42 host kernel: [  105.172940] [fglrx:firegl_cmmqs_BIOSControl] *ERROR* CMMQS BIOS Control: CMMQS handle is not valid.
> Jun  7 14:21:42 host kernel: [  105.172942] [fglrx:firegl_bios_control] *ERROR* CMMQS BIOS Control is failed: firegl_bios_control
> Jun  7 14:21:42 host kernel: [  105.195648] AMD-Vi: Event logged [IO_PAGE_FAULT device=01:00.0 domain=0x0017 address=0x0000000f00268a00 flags=0x0010]
> Jun  7 14:21:42 host kernel: [  105.195651] AMD-Vi: Event logged [IO_PAGE_FAULT device=01:00.0 domain=0x0017 address=0x0000000f0026a300 flags=0x0010]
> ...
> 
> Do you have by chance an idea which other patch is missing to get
> it working again?

Does this happen regardless of whether you've done anything with a VM or
even loaded the vfio modules?  If so, please bisect the patch set and
report where it starts to fail.  None of these patches should have any
effect on existing DMA paths or drivers.  Testing stock v3.4 vs 3.4 +
patches would also be an interesting exercise.  Thanks,

Alex

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