[PATCH v2 6/7] arm: a37xx: pci: Increase PCIe MEM size from 16 MiB to 127 MiB

[Pali Rohár]

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>

---
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*/
 		};
 	};
 };
-- 
2.20.1