Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1536467
| From | Bjorn Helgaas <helgaas@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller |
| Date | 2016-12-05 23:00 +0100 |
| Message-ID | <sL9sJ-1xT-17@gated-at.bofh.it> (permalink) |
| References | <sJmX7-4qd-11@gated-at.bofh.it> <sJEr0-8du-21@gated-at.bofh.it> <sJMeS-5XZ-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Dec 01, 2016 at 06:52:23PM -0800, Duc Dang wrote:
> On Thu, Dec 1, 2016 at 10:33 AM, Bjorn Helgaas <helgaas@kernel.org> wrote:
> I made similar changes in v4 patch. The ECAM quirk will be built when
> ACPI and PCI_QUIRKS are enabled.
>
> When building for DT only, the ECAM quirk won't be compiled.
Perfect.
> >> #define XGENE_PCIE_IP_VER_UNKN 0
> >> #define XGENE_PCIE_IP_VER_1 1
> >> +#define XGENE_PCIE_IP_VER_2 2
> >
> > This isn't used anywhere, which makes me wonder whether it's worth
> > keeping it.
>
> V2 controller will use this XGENE_PCIE_IP_VER_2 (port->version =
> XGENE_PCIE_IP_VER_2). This will be used to indicate that the
> controller is V2, and to enable configuration request retry status
> feature (by not disable it like V1 controller).
OK, I see. You don't actually need XGENE_PCIE_IP_VER_2, you just need
port->version to be something other than XGENE_PCIE_IP_VER_1. So this
is fine as it is.
> >> static void __iomem *xgene_pcie_get_cfg_base(struct pci_bus *bus)
> >> {
> >> - struct xgene_pcie_port *port = bus->sysdata;
> >> + struct pci_config_window *cfg;
> >> + struct xgene_pcie_port *port;
> >> +
> >> + if (acpi_disabled)
> >> + port = bus->sysdata;
> >> + else {
> >> + cfg = bus->sysdata;
> >> + port = cfg->priv;
> >> + }
> >
> > I would really, really like to figure out a way to get rid of these
> > "if (acpi_disabled)" checks sprinkled through here. Is there any way
> > we can set up bus->sysdata to be the same, regardless of whether we're
> > using this as a platform driver or an ACPI quirk?
>
> Right now, I created a inline function to extract xgene_pcie_port from
> pci_bus. In order to get rid of acpi_disabled, I will need to make
> sysdata in DT case also point to pci_config_window structure, which
> means I will need to convert and test the DT driver to use ecam ops.
> It is a separate patch itself. So I think I should do it at later time
> (after this ECAM quirk patch). I hope you are ok with this.
OK. I did the simple-minded version of leaving the DT ops the same
but making sysdata point to a dummy pci_config_window. Your proposal
of using ECAM for DT would be much better.
It's interesting that you actually already use the same accessors
except that DT uses the 32-bit pci_generic_config_write32() and ACPI
uses the regular pci_generic_config_write(). I guess that means the
hardware actually *does* support sub-32 bit writes?
> I need to define the function (xgene_get_csr_resource()) inside
> pci-xgene.c to duplicate the code of acpi_get_rc_addr. The reason is
> X-Gene firmware does not have a dedicate PNP0C02 node to declare the
> resource, and if I use acpi_get_rc_resources() with "PNP0A08", I got
> error due to acpi_bus_get_device() returns error.
Looks good.
> > All these init functions are almost identical. Can we factor this out
> > by having wrappers that do nothing more than pass in the table and
> > version, and put the kzalloc and ioremap in a shared back-end?
>
> I refactor-ed these .init functions. And as a result, there are only 2
> ecam ops left: xgene_v1_pcie_ecam_ops and xgene_v2_pcie_ecam_ops.
Looks good.
Bjorn
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-01 01:00 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Mark Salter <msalter@redhat.com> - 2016-12-01 16:10 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-01 20:20 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-01 21:00 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-01 19:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Mark Salter <msalter@redhat.com> - 2016-12-01 20:30 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-01 20:30 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-01 20:50 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-01 23:20 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-01 23:50 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-02 00:10 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 00:30 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 05:10 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 07:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 08:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 09:10 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-03 00:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-03 01:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-05 22:30 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-06 21:00 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-06 21:20 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-06 21:40 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-03 08:10 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-05 22:30 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-05 22:50 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-06 00:40 +0100
[PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 03:40 +0100
Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 08:20 +0100
Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 08:40 +0100
Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 09:20 +0100
Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 20:50 +0100
Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Jon Masters <jcm@redhat.com> - 2016-12-02 21:10 +0100
[SPCR] mmio32 iotype access requirements for X-Gene 8250(_dw) UART Jon Masters <jcm@redhat.com> - 2016-12-03 11:10 +0100
Re: [SPCR] mmio32 iotype access requirements for X-Gene 8250(_dw) UART Mark Salter <msalter@redhat.com> - 2016-12-03 18:20 +0100
Re: [SPCR] mmio32 iotype access requirements for X-Gene 8250(_dw) UART Jon Masters <jcm@redhat.com> - 2016-12-03 21:40 +0100
Re: [SPCR] mmio32 iotype access requirements for X-Gene 8250(_dw) UART Duc Dang <dhdang@apm.com> - 2016-12-04 11:50 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-02 04:00 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Bjorn Helgaas <helgaas@kernel.org> - 2016-12-05 23:00 +0100
Re: [PATCH v3] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller Duc Dang <dhdang@apm.com> - 2016-12-05 23:20 +0100
csiph-web