[OpenWrt-Devel] [PATCH 7/9] ramips: enable CPS for mt7621
Nikolay Martynov
mar.kolya at gmail.com
Thu Dec 10 23:01:38 EST 2015
Enables CPS multiprocessing instead ob obsoleted CMP for mt7621.
This patch fixes a few issues currently existing on 4.3 kernel with at least ubnt-erx:
* iperf shows only 50Mbits on direct gigabit connection to desktop,
* ping times jump to 5-6ms to dorectly connected desktop
* /proc/interrupts shows spurious interrups (ERR)
Signed-off-by: Nikolay Martynov <mar.kolya at gmail.com>
---
target/linux/ramips/dts/mt7621.dtsi | 2 +-
target/linux/ramips/mt7621/config-4.3 | 8 +-
.../0001-arch-mips-ralink-add-mt7621-support.patch | 134 +++------------------
3 files changed, 21 insertions(+), 123 deletions(-)
diff --git a/target/linux/ramips/dts/mt7621.dtsi b/target/linux/ramips/dts/mt7621.dtsi
index 1f2f5b5..53ac45c 100644
--- a/target/linux/ramips/dts/mt7621.dtsi
+++ b/target/linux/ramips/dts/mt7621.dtsi
@@ -237,7 +237,7 @@
gic: interrupt-controller at 1fbc0000 {
compatible = "mti,gic";
- reg = <0x1fbc0000 0x80>;
+ reg = <0x1fbc0000 0x2000>;
interrupt-controller;
#interrupt-cells = <3>;
diff --git a/target/linux/ramips/mt7621/config-4.3 b/target/linux/ramips/mt7621/config-4.3
index 3657460..f25850a 100644
--- a/target/linux/ramips/mt7621/config-4.3
+++ b/target/linux/ramips/mt7621/config-4.3
@@ -5,10 +5,12 @@ CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
CONFIG_ARCH_HAS_RESET_CONTROLLER=y
# CONFIG_ARCH_HAS_SG_CHAIN is not set
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_BOARD_SCACHE=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -117,7 +119,8 @@ CONFIG_LZO_DECOMPRESS=y
CONFIG_MDIO_BOARDINFO=y
CONFIG_MIPS=y
CONFIG_MIPS_CM=y
-CONFIG_MIPS_CMP=y
+CONFIG_MIPS_CPC=y
+CONFIG_MIPS_CPS=y
CONFIG_MIPS_CPU_SCACHE=y
CONFIG_MIPS_GIC=y
CONFIG_MIPS_GIC_IPI=y
@@ -226,9 +229,10 @@ CONFIG_SYS_HAS_CPU_MIPS32_R2=y
CONFIG_SYS_HAS_EARLY_PRINTK=y
CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_HOTPLUG_CPU=y
CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
CONFIG_SYS_SUPPORTS_MIPS16=y
-CONFIG_SYS_SUPPORTS_MIPS_CMP=y
+CONFIG_SYS_SUPPORTS_MIPS_CPS=y
CONFIG_SYS_SUPPORTS_MULTITHREADING=y
CONFIG_SYS_SUPPORTS_SCHED_SMT=y
CONFIG_SYS_SUPPORTS_SMP=y
diff --git a/target/linux/ramips/patches-4.3/0001-arch-mips-ralink-add-mt7621-support.patch b/target/linux/ramips/patches-4.3/0001-arch-mips-ralink-add-mt7621-support.patch
index 67d816c..153dd9e 100644
--- a/target/linux/ramips/patches-4.3/0001-arch-mips-ralink-add-mt7621-support.patch
+++ b/target/linux/ramips/patches-4.3/0001-arch-mips-ralink-add-mt7621-support.patch
@@ -120,7 +120,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
choice
prompt "Ralink SoC selection"
default SOC_RT305X
-@@ -34,6 +39,15 @@ choice
+@@ -34,6 +39,14 @@ choice
config SOC_MT7620
bool "MT7620/8"
@@ -129,14 +129,13 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
+ select MIPS_CPU_SCACHE
+ select SYS_SUPPORTS_MULTITHREADING
+ select SYS_SUPPORTS_SMP
-+ select SYS_SUPPORTS_MIPS_CMP
++ select SYS_SUPPORTS_MIPS_CPS
+ select MIPS_GIC
-+ select IRQ_GIC
+ select HW_HAS_PCI
endchoice
choice
-@@ -65,6 +79,10 @@ choice
+@@ -65,6 +78,10 @@ choice
depends on SOC_MT7620
select BUILTIN_DTB
@@ -149,7 +148,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
endif
--- a/arch/mips/ralink/Makefile
+++ b/arch/mips/ralink/Makefile
-@@ -6,16 +6,21 @@
+@@ -6,16 +6,20 @@
# Copyright (C) 2009-2011 Gabor Juhos <juhosg at openwrt.org>
# Copyright (C) 2013 John Crispin <blogic at openwrt.org>
@@ -161,8 +160,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
obj-$(CONFIG_RALINK_ILL_ACC) += ill_acc.o
+obj-$(CONFIG_IRQ_INTC) += irq.o
-+obj-$(CONFIG_MIPS_GIC_IPI) += irq-gic.o
-+obj-$(CONFIG_MIPS_MT_SMP) += malta-amon.o
++obj-$(CONFIG_MIPS_GIC) += irq-gic.o
+
obj-$(CONFIG_SOC_RT288X) += rt288x.o
obj-$(CONFIG_SOC_RT305X) += rt305x.o
@@ -185,136 +183,28 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
+cflags-$(CONFIG_SOC_MT7621) += -I$(srctree)/arch/mips/include/asm/mach-ralink/mt7621
--- /dev/null
+++ b/arch/mips/ralink/irq-gic.c
-@@ -0,0 +1,42 @@
+@@ -0,0 +1,18 @@
+#include <linux/init.h>
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+#include <linux/interrupt.h>
-+#include <linux/kernel_stat.h>
-+#include <linux/hardirq.h>
-+#include <linux/preempt.h>
-+#include <linux/irqdomain.h>
-+#include <linux/of_platform.h>
-+#include <linux/of_address.h>
-+#include <linux/of_irq.h>
-+
-+#include <asm/irq_cpu.h>
-+#include <asm/mipsregs.h>
+
-+#include <asm/irq.h>
-+#include <asm/setup.h>
++#include <linux/of.h>
++#include <linux/irqchip.h>
+
-+#include <asm/mips-cm.h>
+#include <linux/irqchip/mips-gic.h>
+
-+#include <asm/mach-ralink/mt7621.h>
-+
-+extern int __init gic_of_init(struct device_node *node,
-+ struct device_node *parent);
-+
+unsigned int get_c0_compare_int(void)
+{
+ return gic_get_c0_compare_int();
+}
+
-+static struct of_device_id __initdata of_irq_ids[] = {
-+ { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
-+ { .compatible = "mti,gic", .data = gic_of_init },
-+ {},
-+};
-+
+void __init
+arch_init_irq(void)
+{
-+ of_irq_init(of_irq_ids);
++ irqchip_init();
+}
---- /dev/null
-+++ b/arch/mips/ralink/malta-amon.c
-@@ -0,0 +1,81 @@
-+/*
-+ * Copyright (C) 2007 MIPS Technologies, Inc.
-+ * All rights reserved.
-+
-+ * This program is free software; you can distribute it and/or modify it
-+ * under the terms of the GNU General Public License (Version 2) as
-+ * published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope it will be useful, but WITHOUT
-+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-+ * for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License along
-+ * with this program; if not, write to the Free Software Foundation, Inc.,
-+ * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
-+ *
-+ * Arbitrary Monitor interface
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/smp.h>
-+
-+#include <asm/addrspace.h>
-+#include <asm/mips-boards/launch.h>
-+#include <asm/mipsmtregs.h>
-+
-+int amon_cpu_avail(int cpu)
-+{
-+ struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
+
-+ if (cpu < 0 || cpu >= NCPULAUNCH) {
-+ pr_debug("avail: cpu%d is out of range\n", cpu);
-+ return 0;
-+ }
-+
-+ launch += cpu;
-+ if (!(launch->flags & LAUNCH_FREADY)) {
-+ pr_debug("avail: cpu%d is not ready\n", cpu);
-+ return 0;
-+ }
-+ if (launch->flags & (LAUNCH_FGO|LAUNCH_FGONE)) {
-+ pr_debug("avail: too late.. cpu%d is already gone\n", cpu);
-+ return 0;
-+ }
-+
-+ return 1;
-+}
-+
-+void amon_cpu_start(int cpu,
-+ unsigned long pc, unsigned long sp,
-+ unsigned long gp, unsigned long a0)
-+{
-+ volatile struct cpulaunch *launch =
-+ (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
-+
-+ if (!amon_cpu_avail(cpu))
-+ return;
-+ if (cpu == smp_processor_id()) {
-+ pr_debug("launch: I am cpu%d!\n", cpu);
-+ return;
-+ }
-+ launch += cpu;
-+
-+ pr_debug("launch: starting cpu%d\n", cpu);
-+
-+ launch->pc = pc;
-+ launch->gp = gp;
-+ launch->sp = sp;
-+ launch->a0 = a0;
-+
-+ smp_wmb(); /* Target must see parameters before go */
-+ launch->flags |= LAUNCH_FGO;
-+ smp_wmb(); /* Target must see go before we poll */
-+
-+ while ((launch->flags & LAUNCH_FGONE) == 0)
-+ ;
-+ smp_rmb(); /* Target will be updating flags soon */
-+ pr_debug("launch: cpu%d gone!\n", cpu);
-+}
--- /dev/null
+++ b/arch/mips/ralink/mt7621.c
-@@ -0,0 +1,209 @@
+@@ -0,0 +1,213 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
@@ -432,6 +322,10 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
+ { 0 }
+};
+
++phys_addr_t mips_cpc_default_phys_base() {
++ panic("Cannot detect cpc address");
++}
++
+void __init ralink_clk_init(void)
+{
+ int cpu_fdiv = 0;
--
2.6.4
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