linux-kernel - Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe controller

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Date:   Fri, 2 Dec 2016 02:12:59 -0500
From:   Jon Masters <jcm@...hat.com>
To:     Duc Dang <dhdang@....com>, Bjorn Helgaas <helgaas@...nel.org>
Cc:     Rafael Wysocki <rafael@...nel.org>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Mark Salter <msalter@...hat.com>, linux-pci@...r.kernel.org,
        linux-arm <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Tomasz Nowicki <tn@...ihalf.com>, patches <patches@....com>
Subject: Re: [PATCH v4 1/1] PCI/ACPI: xgene: Add ECAM quirk for X-Gene PCIe
 controller

On 12/01/2016 09:27 PM, Duc Dang wrote:
> PCIe controllers in X-Gene SoCs is not ECAM compliant: software
> needs to configure additional controller's register to address
> device at bus:dev:function.
> 
> The quirk will discover controller MMIO register space and configure
> controller registers to select and address the target secondary device.
> 
> The quirk will only be applied for X-Gene PCIe MCFG table with
> OEM revison 1, 2, 3 or 4 (PCIe controller v1 and v2 on X-Gene SoCs).
> 
> Signed-off-by: Duc Dang <dhdang@....com>

So far I've tested this on an HPE ProLiant m400 (Moonshot) cartridge
and will test it on some other reference platforms soon. Bootlog for
the m400 attached in case Bjorn wants to see the output. Here's
what I see in /proc/iomem btw on that platform:

# cat /proc/iomem 
10520000-10523fff : APMC0D18:00
  10520000-10523fff : APMC0D18:00
10524000-10527fff : APMC0D17:00
10540000-1054a0ff : APMC0D01:00
  10546000-10546fff : APMC0D50:00
  1054a000-1054a00f : APMC0D12:03
    1054a000-1054a00f : APMC0D12:02
      1054a000-1054a00f : APMC0D12:01
        1054a000-1054a00f : APMC0D12:00
17000000-17000fff : APMC0D01:00
17001000-17001fff : APMC0D01:00
  17001000-170013ff : APMC0D15:00
    17001000-170013ff : APMC0D15:00
1701c000-1701cfff : APMC0D14:00
1a800000-1a800fff : APMC0D0D:00
  1a800000-1a800fff : APMC0D0D:00
1c000200-1c0002ff : APMC0D06:00
1c021000-1c0210ff : APMC0D08:00
  1c021000-1c02101f : serial
1c024000-1c024fff : APMC0D07:00
1f230000-1f230fff : APMC0D0D:00
  1f230000-1f230fff : APMC0D0D:00
1f23d000-1f23dfff : APMC0D0D:00
  1f23d000-1f23dfff : APMC0D0D:00
1f23e000-1f23efff : APMC0D0D:00
  1f23e000-1f23efff : APMC0D0D:00
1f2a0000-1f31ffff : APMC0D06:00
1f500000-1f50ffff : PCI Bus 0000:00
  1f500000-1f50ffff : PNP0A08:00
78800000-78800fff : APMC0D13:00
  78800000-78800fff : APMC0D12:03
    78800000-78800fff : APMC0D12:02
      78800000-78800fff : APMC0D12:01
        78800000-78800fff : APMC0D12:00
          78800000-78800fff : APMC0D11:00
          78800000-78800fff : APMC0D10:03
          78800000-78800fff : APMC0D10:02
          78800000-78800fff : APMC0D10:01
          78800000-78800fff : APMC0D10:00
79000000-798fffff : APMC0D0E:00
7c000000-7c1fffff : APMC0D12:00
7c200000-7c3fffff : APMC0D12:01
7c400000-7c5fffff : APMC0D12:02
7c600000-7c7fffff : APMC0D12:03
7e000000-7e000fff : APMC0D13:00
7e200000-7e200fff : APMC0D10:03
  7e200000-7e200fff : APMC0D10:02
    7e200000-7e200fff : APMC0D10:01
      7e200000-7e200fff : APMC0D10:00
7e600000-7e600fff : APMC0D11:00
7e700000-7e700fff : APMC0D10:03
  7e700000-7e700fff : APMC0D10:02
    7e700000-7e700fff : APMC0D10:01
      7e700000-7e700fff : APMC0D10:00
7e720000-7e720fff : APMC0D10:03
  7e720000-7e720fff : APMC0D10:02
    7e720000-7e720fff : APMC0D10:01
      7e720000-7e720fff : APMC0D10:00
7e800000-7e800fff : APMC0D10:00
7e840000-7e840fff : APMC0D10:01
7e880000-7e880fff : APMC0D10:02
7e8c0000-7e8c0fff : APMC0D10:03
7e930000-7e930fff : APMC0D13:00
4000000000-4001ffffff : System RAM
  4000080000-4000c3ffff : Kernel code
  4000db0000-400165ffff : Kernel data
40023a0000-4ff733ffff : System RAM
4ff7340000-4ff77cffff : reserved
4ff77d0000-4ff79cffff : System RAM
4ff79d0000-4ff7e7ffff : reserved
4ff7e80000-4ff7e8ffff : System RAM
4ff7e90000-4ff7efffff : reserved
4ff7f10000-4ff800ffff : reserved
4ff8010000-4fffffffff : System RAM
a020000000-a03fffffff : PCI Bus 0000:00
  a020000000-a0201fffff : PCI Bus 0000:01
    a020000000-a0200fffff : 0000:01:00.0
      a020000000-a0200fffff : mlx4_core
    a020100000-a0201fffff : 0000:01:00.0
a060000000-a07fffffff : PCI Bus 0000:00
a0d0000000-a0dfffffff : PCI ECAM
a110000000-a14fffffff : PCI Bus 0000:00
  a110000000-a121ffffff : PCI Bus 0000:01
    a110000000-a111ffffff : 0000:01:00.0
      a110000000-a111ffffff : mlx4_core
    a112000000-a121ffffff : 0000:01:00.0

Adding a Tested-by for the record:

Tested-by: Jon Masters <jcm@...hat.com>

Jon.

-- 
Computer Architect | Sent from my Fedora powered laptop


View attachment "dmesg-4.9.0-rc7.ecam_jcm1+.txt" of type "text/plain" (29282 bytes)