git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From dda83b1fb650670b865e8735115c00bdfccacabf Mon Sep 17 00:00:00 2001
   2 From: Jonathan Bell <jonathan@raspberrypi.com>
   3 Date: Fri, 24 May 2024 14:49:28 +0100
   4 Subject: [PATCH 1107/1135] DTS: overlays: add mmio-hi parameter to
   5  pciex1-compat-pi5
   6
   7 I225-V network adapters have a buggy ROM that won't complete internal
   8 initialisation if (at least) BAR0 has an assigned address of 0x0.
   9
  10 Add a parameter to the pciex1-compat-pi5 overlay to make outbound
  11 addresses start at 2GB.
  12
  13 Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
  14 ---
  15  arch/arm/boot/dts/overlays/README             |  2 ++
  16  .../overlays/pciex1-compat-pi5-overlay.dts    | 20 +++++++++++++++++++
  17  2 files changed, 22 insertions(+)
  18
  19 --- a/arch/arm/boot/dts/overlays/README
  20 +++ b/arch/arm/boot/dts/overlays/README
  21 @@ -3550,6 +3550,8 @@ Params: l1ss                    Enable A
  22                                  the MSI-MIP peripheral. Use if a) more than 8
  23                                  interrupt vectors are required or b) the EP
  24                                  requires DMA and MSI addresses to be 32bit.
  25 +        mmio-hi                 Move the start of outbound 32bit addresses to
  26 +                                2GB and expand 64bit outbound space to 14GB.
  27
  28
  29  [ The pcf2127-rtc overlay has been deleted. See i2c-rtc. ]
  30 --- a/arch/arm/boot/dts/overlays/pciex1-compat-pi5-overlay.dts
  31 +++ b/arch/arm/boot/dts/overlays/pciex1-compat-pi5-overlay.dts
  32 @@ -32,9 +32,29 @@
  33                 };
  34         };
  35
  36 +       /*
  37 +        * Shift the start of the 32bit outbound window to 2GB,
  38 +        * so there are no BARs starting at 0x0. Expand the 64bit
  39 +        * outbound window to use the spare 2GB.
  40 +        */
  41 +       fragment@3 {
  42 +               target = <&pciex1>;
  43 +               __dormant__ {
  44 +                       #address-cells = <3>;
  45 +                       #size-cells = <2>;
  46 +                       ranges = <0x02000000 0x00 0x80000000
  47 +                                 0x1b 0x80000000
  48 +                                 0x00 0x7ffffffc>,
  49 +                                <0x43000000 0x04 0x00000000
  50 +                                 0x18 0x00000000
  51 +                                 0x03 0x80000000>;
  52 +               };
  53 +       };
  54 +
  55         __overrides__ {
  56                 l1ss = <0>, "+0";
  57                 no-l0s = <0>, "+1";
  58                 no-mip = <0>, "+2";
  59 +               mmio-hi = <0>, "+3";
  60         };
  61  };