From: Daniel Axtens <dja@axtens.net>
To: Scott Wood <scottwood@freescale.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH v3 16/19] powerpc: fsl_pci, swiotlb: Move controller ops from ppc_md to controller_ops
Date: Fri, 10 Apr 2015 12:36:28 +1000 [thread overview]
Message-ID: <1428633388.4486.14.camel@axtens.net> (raw)
In-Reply-To: <1428629330.22867.567.camel@freescale.com>
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Hi Scott,
This is part of the larger set to move controller ops into a generic
structure. The original cover letter is at
https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-March/126837.html
The commit message should have been reworded when I sent out version 2.
Apologies. Here's a more accurate summary, which will appear in v4.
powerpc: fsl_pci, swiotlb: Move controller ops from ppc_md to
controller_ops
Move the installation of DMA operations out of swiotlb's subsys
initcall, and into the generic PCI controller operations struct.
These ops are installed conditionally, based on the ppc_swiotlb_enable
global. The global can be set in two places:
- swiotlb_detect_4g, which is always called at the arch initcall level
- setup_pci_atmu, which is called as part of the fsl_add_bridge and
fsl_pci_syscore_do_resume. fsl_pci_syscore_do_resume is called late
enough that any changes as a result of that call will have no effect.
As such, if we test the global and set the operations as part of
fsl_add_bridge, after the call to setup_pci_atmu, we can be confident
that it will cover all the PCI implementations affected by the changes
to dma-swiotlb.c.
Regards,
Daniel
On Thu, 2015-04-09 at 20:28 -0500, Scott Wood wrote:
> On Fri, 2015-04-10 at 10:11 +1000, Daniel Axtens wrote:
> > Moves the setup out of swiotlb's subsys init call, and into an new
> > structure.
>
> "a new"
>
> > fsl_pci.c is the only thing that checks the ppc_swiotlb_enable global,
> > so we can be confident that patching it will cover all the PCI
> > implementations affected by the changes to dma-swiotlb.c.
>
> Do you mean the only thing that sets ppc_swiotlb_enable (fsl_pci.c
> doesn't check it)? It's also set by swiotlb_detect_4g().
>
> Where is the rest of this patchset? What is the problem being solved?
>
> -Scott
>
>
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next prev parent reply other threads:[~2015-04-10 2:36 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-31 5:00 [PATCH v2 00/19] Refactor PCI controller operations Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 01/19] powerpc: move find_and_init_phbs() to pSeries specific code Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 02/19] powerpc/powermac: move pmac_pci_probe_mode from setup.c to pci.c Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 03/19] powerpc: pcibios_enable_device_hook: return bool rather than int Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 04/19] powerpc: Create pci_controller_ops.dma_dev_setup and shim Daniel Axtens
2015-04-02 14:13 ` Arnd Bergmann
2015-04-07 0:31 ` Daniel Axtens
2015-04-07 7:44 ` Arnd Bergmann
2015-04-08 3:31 ` Michael Ellerman
2015-03-31 5:00 ` [PATCH v2 05/19] powerpc: Create pci_controller_ops.dma_bus_setup " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 06/19] powerpc: Create pci_controller_ops.probe_mode " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 07/19] powerpc: Create pci_controller_ops.enable_device_hook " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 08/19] powerpc: Create pci_controller_ops.window_alignment " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 09/19] powerpc: Create pci_controller_ops.reset_secondary_bus " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 10/19] powerpc: dart_iommu: optionally populate controller_ops on init Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 11/19] powerpc/powermac: Move controller ops from ppc_md to controller_ops Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 12/19] powerpc/pseries: " Daniel Axtens
2015-04-02 3:21 ` [PATCH v3 " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 13/19] powerpc/powernv: " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 14/19] powerpc/pasemi: " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 15/19] powerpc/maple: " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 16/19] powerpc: fsl_pci, swiotlb: " Daniel Axtens
2015-04-10 0:11 ` [PATCH v3 " Daniel Axtens
2015-04-10 1:28 ` Scott Wood
2015-04-10 2:36 ` Daniel Axtens [this message]
2015-04-10 3:15 ` [PATCH v4 " Daniel Axtens
2015-04-10 3:18 ` Scott Wood
2015-03-31 5:00 ` [PATCH v2 17/19] powerpc/cell: " Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 18/19] powerpc: Remove shims for pci_controller_ops operations Daniel Axtens
2015-03-31 5:00 ` [PATCH v2 19/19] powerpc: dart_iommu: Remove check for controller_ops == NULL case Daniel Axtens
2015-04-07 7:51 ` [PATCH v2 00/19] Refactor PCI controller operations Arnd Bergmann
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