[PATCH v2 6/7] arm: a37xx: pci: Increase PCIe MEM size from 16 MiB to 127 MiB
Stefan Roese
sr at denx.de
Thu May 27 08:23:27 CEST 2021
On 26.05.21 17:59, Pali Rohár wrote:
> For some configurations with more PCIe cards and PCIe bridges, 16 MiB of
> PCIe MEM space may not be enough. Since TF-A already allocates a 128 MiB
> CPU window for PCIe, and since IO port space is only 64 KiB in total,
> use all the remaining space (64 + 32 + 16 + 8 + 4 + 2 + 1 = 127 MiB) for
> PCIe MEM.
>
> Signed-off-by: Pali Rohár <pali at kernel.org>
> Reviewed-by: Marek Behún <marek.behun at nic.cz>
Reviewed-by: Stefan Roese <sr at denx.de>
Thanks,
Stefan
> ---
> Changes in v2:
> * Fix size for PCIe MEM
> ---
> arch/arm/dts/armada-37xx.dtsi | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/dts/armada-37xx.dtsi b/arch/arm/dts/armada-37xx.dtsi
> index b7d325b40577..2615b8c748c1 100644
> --- a/arch/arm/dts/armada-37xx.dtsi
> +++ b/arch/arm/dts/armada-37xx.dtsi
> @@ -332,10 +332,17 @@
> status = "disabled";
>
> bus-range = <0 0xff>;
> + /*
> + * The 128 MiB address range [0xe8000000-0xf0000000] is
> + * dedicated for PCIe and can be assigned to 8 windows
> + * with size a power of two. Use one 64 KiB window for
> + * IO at the end and the remaining seven windows
> + * (totaling 127 MiB) for MEM.
> + */
> ranges = <0x82000000 0 0xe8000000
> - 0 0xe8000000 0 0x1000000 /* Port 0 MEM */
> - 0x81000000 0 0xe9000000
> - 0 0xe9000000 0 0x10000>; /* Port 0 IO*/
> + 0 0xe8000000 0 0x7f00000 /* Port 0 MEM */
> + 0x81000000 0 0xefff0000
> + 0 0xefff0000 0 0x10000>; /* Port 0 IO*/
> };
> };
> };
>
Viele Grüße,
Stefan
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr at denx.de
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