This is a note to let you know that I've just added the patch titled
riscv: dts: sifive: fu740: fix size of pcie 32bit memory
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
riscv-dts-sifive-fu740-fix-size-of-pcie-32bit-memory.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 43d5f5d63699724d47f0d9e0eae516a260d232b4 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
Date: Fri, 6 Jan 2023 13:44:56 +0000
Subject: riscv: dts: sifive: fu740: fix size of pcie 32bit memory
From: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
commit 43d5f5d63699724d47f0d9e0eae516a260d232b4 upstream.
The 32-bit memory resource is needed for non-prefetchable memory
allocations on the PCIe bus, however with some cards (such as the
SM768) the system fails to allocate memory from this.
Checking the allocation against the datasheet, it looks like there
has been a mis-calcualation of the resource for the first memory
region (0x0060090000..0x0070ffffff) which in the data-sheet for
the fu740 (v1p2) is from 0x0060000000..0x007fffffff. Changing
this to allocate from 0x0060090000..0x007fffffff fixes the probing
issues.
Fixes: ae80d5148085 ("riscv: dts: Add PCIe support for the SiFive FU740-C000 SoC")
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Greentime Hu <greentime.hu@xxxxxxxxxx>
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Tested-by: Ron Economos <re@xxxxxxxx> # from IRC
Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/boot/dts/sifive/fu740-c000.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
+++ b/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
@@ -328,7 +328,7 @@
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x60080000 0x0 0x60080000 0x0 0x10000>, /* I/O */
<0x82000000 0x0 0x60090000 0x0 0x60090000 0x0 0xff70000>, /* mem */
- <0x82000000 0x0 0x70000000 0x0 0x70000000 0x0 0x1000000>, /* mem */
+ <0x82000000 0x0 0x70000000 0x0 0x70000000 0x0 0x10000000>, /* mem */
<0xc3000000 0x20 0x00000000 0x20 0x00000000 0x20 0x00000000>; /* mem prefetchable */
num-lanes = <0x8>;
interrupts = <56>, <57>, <58>, <59>, <60>, <61>, <62>, <63>, <64>;
Patches currently in stable-queue which might be from ben.dooks@xxxxxxxxxxxxxxx are
queue-5.15/riscv-dts-sifive-fu740-fix-size-of-pcie-32bit-memory.patch
