arm: a37xx: pci: Increase PCIe MEM size from 16 MiB to 127 MiB

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@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/arch/arm/dts/armada-37xx.dtsi b/arch/arm/dts/armada-37xx.dtsi
index b7d325b..2615b8c 100644 (file)
--- 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*/
                };
        };
 };