* [PATCH v7 0/6] Introduce SMP support for CI20 (based on JZ4780).
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 1/6] MIPS: JZ4780: Introduce SMP support 周琰杰 (Zhou Yanjie)
` (5 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Introduce SMP support for MIPS Creator CI20, which is
based on Ingenic JZ4780 SoC.
周琰杰 (Zhou Yanjie) (6):
MIPS: JZ4780: Introduce SMP support.
MIPS: CI20: Modify DTS to support high resolution timer for SMP.
clocksource: Ingenic: Add high resolution timer support for SMP.
dt-bindings: MIPS: Document Ingenic SoCs binding.
MIPS: Ingenic: Add 'cpus' node for Ingenic SoCs.
MIPS: CI20: Update defconfig to support SMP.
.../bindings/mips/ingenic/ingenic,cpu.yaml | 57 +++++
arch/mips/boot/dts/ingenic/ci20.dts | 11 +-
arch/mips/boot/dts/ingenic/jz4740.dtsi | 14 ++
arch/mips/boot/dts/ingenic/jz4770.dtsi | 15 +-
arch/mips/boot/dts/ingenic/jz4780.dtsi | 23 ++
arch/mips/boot/dts/ingenic/x1000.dtsi | 14 ++
arch/mips/configs/ci20_defconfig | 2 +
arch/mips/include/asm/mach-jz4740/smp.h | 87 +++++++
arch/mips/jz4740/Kconfig | 2 +
arch/mips/jz4740/Makefile | 5 +
arch/mips/jz4740/prom.c | 4 +
arch/mips/jz4740/smp-entry.S | 57 +++++
arch/mips/jz4740/smp.c | 258 +++++++++++++++++++++
arch/mips/kernel/idle.c | 35 ++-
drivers/clocksource/ingenic-timer.c | 103 ++++++--
15 files changed, 661 insertions(+), 26 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
create mode 100644 arch/mips/include/asm/mach-jz4740/smp.h
create mode 100644 arch/mips/jz4740/smp-entry.S
create mode 100644 arch/mips/jz4740/smp.c
--
2.7.4
^ permalink raw reply [flat|nested] 9+ messages in thread* [PATCH v7 1/6] MIPS: JZ4780: Introduce SMP support.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 0/6] Introduce SMP support for CI20 (based on JZ4780) 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 2/6] MIPS: CI20: Modify DTS to support high resolution timer for SMP 周琰杰 (Zhou Yanjie)
` (4 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Forward port smp support from kernel 3.18.3 of CI20_linux
to upstream kernel 5.6.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
Notes:
v1->v2:
1.Remove unnecessary "plat_irq_dispatch(void)" in irq-ingenic.c.
2.Add a timeout check for "jz4780_boot_secondary()" to avoid a dead loop.
3.Replace hard code in smp.c with macro.
v2->v3:
1.Remove unnecessary "extern void (*r4k_blast_dcache)(void)" in smp.c.
2.Use "for_each_of_cpu_node" instead "for_each_compatible_node" in smp.c.
3.Use "of_cpu_node_to_id" instead "of_property_read_u32_index" in smp.c.
4.Move LCR related operations to jz4780-cgu.c.
v3->v4:
Rebase on top of kernel 5.6-rc1.
v4->v5:
1.Splitting changes involving "jz4780-cgu.c" into separate commit.
2.Use "request_irq()" replace "setup_irq()".
v5->v6:
In order to have a kernel that works on multiple SoCs at the same
time, use "IS_ENABLED()" replace "#ifdef".
v6->v7:
1.SMP has be decoupled from the SoC version.
2.Add mailboxes 3 and 4 for XBurst.
3.Adjust code in "jz4780_smp_prepare_cpus()".
4."jz4780_smp_init()" has be marked "__init".
arch/mips/include/asm/mach-jz4740/smp.h | 87 +++++++++++
arch/mips/jz4740/Kconfig | 2 +
arch/mips/jz4740/Makefile | 5 +
arch/mips/jz4740/prom.c | 4 +
arch/mips/jz4740/smp-entry.S | 57 +++++++
arch/mips/jz4740/smp.c | 258 ++++++++++++++++++++++++++++++++
arch/mips/kernel/idle.c | 35 ++++-
7 files changed, 447 insertions(+), 1 deletion(-)
create mode 100644 arch/mips/include/asm/mach-jz4740/smp.h
create mode 100644 arch/mips/jz4740/smp-entry.S
create mode 100644 arch/mips/jz4740/smp.c
diff --git a/arch/mips/include/asm/mach-jz4740/smp.h b/arch/mips/include/asm/mach-jz4740/smp.h
new file mode 100644
index 00000000..86f660f
--- /dev/null
+++ b/arch/mips/include/asm/mach-jz4740/smp.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2013, Paul Burton <paul.burton@imgtec.com>
+ * JZ4780 SMP definitions
+ */
+
+#ifndef __MIPS_ASM_MACH_JZ4740_SMP_H__
+#define __MIPS_ASM_MACH_JZ4740_SMP_H__
+
+#define read_c0_corectrl() __read_32bit_c0_register($12, 2)
+#define write_c0_corectrl(val) __write_32bit_c0_register($12, 2, val)
+
+#define read_c0_corestatus() __read_32bit_c0_register($12, 3)
+#define write_c0_corestatus(val) __write_32bit_c0_register($12, 3, val)
+
+#define read_c0_reim() __read_32bit_c0_register($12, 4)
+#define write_c0_reim(val) __write_32bit_c0_register($12, 4, val)
+
+#define read_c0_mailbox0() __read_32bit_c0_register($20, 0)
+#define write_c0_mailbox0(val) __write_32bit_c0_register($20, 0, val)
+
+#define read_c0_mailbox1() __read_32bit_c0_register($20, 1)
+#define write_c0_mailbox1(val) __write_32bit_c0_register($20, 1, val)
+
+#define read_c0_mailbox2() __read_32bit_c0_register($20, 2)
+#define write_c0_mailbox2(val) __write_32bit_c0_register($20, 2, val)
+
+#define read_c0_mailbox3() __read_32bit_c0_register($20, 3)
+#define write_c0_mailbox3(val) __write_32bit_c0_register($20, 3, val)
+
+#define smp_clr_pending(mask) do { \
+ unsigned int stat; \
+ stat = read_c0_corestatus(); \
+ stat &= ~((mask) & 0xff); \
+ write_c0_corestatus(stat); \
+ } while (0)
+
+/*
+ * Core Control register
+ */
+#define CORECTRL_SLEEP1M_SHIFT 17
+#define CORECTRL_SLEEP1M (_ULCAST_(0x1) << CORECTRL_SLEEP1M_SHIFT)
+#define CORECTRL_SLEEP0M_SHIFT 16
+#define CORECTRL_SLEEP0M (_ULCAST_(0x1) << CORECTRL_SLEEP0M_SHIFT)
+#define CORECTRL_RPC1_SHIFT 9
+#define CORECTRL_RPC1 (_ULCAST_(0x1) << CORECTRL_RPC1_SHIFT)
+#define CORECTRL_RPC0_SHIFT 8
+#define CORECTRL_RPC0 (_ULCAST_(0x1) << CORECTRL_RPC0_SHIFT)
+#define CORECTRL_SWRST1_SHIFT 1
+#define CORECTRL_SWRST1 (_ULCAST_(0x1) << CORECTRL_SWRST1_SHIFT)
+#define CORECTRL_SWRST0_SHIFT 0
+#define CORECTRL_SWRST0 (_ULCAST_(0x1) << CORECTRL_SWRST0_SHIFT)
+
+/*
+ * Core Status register
+ */
+#define CORESTATUS_SLEEP1_SHIFT 17
+#define CORESTATUS_SLEEP1 (_ULCAST_(0x1) << CORESTATUS_SLEEP1_SHIFT)
+#define CORESTATUS_SLEEP0_SHIFT 16
+#define CORESTATUS_SLEEP0 (_ULCAST_(0x1) << CORESTATUS_SLEEP0_SHIFT)
+#define CORESTATUS_IRQ1P_SHIFT 9
+#define CORESTATUS_IRQ1P (_ULCAST_(0x1) << CORESTATUS_IRQ1P_SHIFT)
+#define CORESTATUS_IRQ0P_SHIFT 8
+#define CORESTATUS_IRQ0P (_ULCAST_(0x1) << CORESTATUS_IRQ8P_SHIFT)
+#define CORESTATUS_MIRQ1P_SHIFT 1
+#define CORESTATUS_MIRQ1P (_ULCAST_(0x1) << CORESTATUS_MIRQ1P_SHIFT)
+#define CORESTATUS_MIRQ0P_SHIFT 0
+#define CORESTATUS_MIRQ0P (_ULCAST_(0x1) << CORESTATUS_MIRQ0P_SHIFT)
+
+/*
+ * Reset Entry & IRQ Mask register
+ */
+#define REIM_ENTRY_SHIFT 16
+#define REIM_ENTRY (_ULCAST_(0xffff) << REIM_ENTRY_SHIFT)
+#define REIM_IRQ1M_SHIFT 9
+#define REIM_IRQ1M (_ULCAST_(0x1) << REIM_IRQ1M_SHIFT)
+#define REIM_IRQ0M_SHIFT 8
+#define REIM_IRQ0M (_ULCAST_(0x1) << REIM_IRQ0M_SHIFT)
+#define REIM_MBOXIRQ1M_SHIFT 1
+#define REIM_MBOXIRQ1M (_ULCAST_(0x1) << REIM_MBOXIRQ1M_SHIFT)
+#define REIM_MBOXIRQ0M_SHIFT 0
+#define REIM_MBOXIRQ0M (_ULCAST_(0x1) << REIM_MBOXIRQ0M_SHIFT)
+
+extern void jz4780_smp_init(void);
+extern void jz4780_secondary_cpu_entry(void);
+
+#endif /* __MIPS_ASM_MACH_JZ4740_SMP_H__ */
diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index 412d2fa..2b88557 100644
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -34,9 +34,11 @@ config MACH_JZ4770
config MACH_JZ4780
bool
+ select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select MIPS_CPU_SCACHE
select SYS_HAS_CPU_MIPS32_R2
select SYS_SUPPORTS_HIGHMEM
+ select SYS_SUPPORTS_SMP
config MACH_X1000
bool
diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile
index 6de14c0..0a0f024 100644
--- a/arch/mips/jz4740/Makefile
+++ b/arch/mips/jz4740/Makefile
@@ -12,3 +12,8 @@ CFLAGS_setup.o = -I$(src)/../../../scripts/dtc/libfdt
# PM support
obj-$(CONFIG_PM) += pm.o
+
+# SMP support
+
+obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_SMP) += smp-entry.o
diff --git a/arch/mips/jz4740/prom.c b/arch/mips/jz4740/prom.c
index ff4555c..4acf5c2c 100644
--- a/arch/mips/jz4740/prom.c
+++ b/arch/mips/jz4740/prom.c
@@ -8,10 +8,14 @@
#include <asm/bootinfo.h>
#include <asm/fw/fw.h>
+#include <asm/mach-jz4740/smp.h>
void __init prom_init(void)
{
fw_init_cmdline();
+
+ if (IS_ENABLED(CONFIG_SMP))
+ jz4780_smp_init();
}
void __init prom_free_prom_memory(void)
diff --git a/arch/mips/jz4740/smp-entry.S b/arch/mips/jz4740/smp-entry.S
new file mode 100644
index 00000000..20049a3
--- /dev/null
+++ b/arch/mips/jz4740/smp-entry.S
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2013, Paul Burton <paul.burton@imgtec.com>
+ * JZ4780 SMP entry point
+ */
+
+#include <asm/addrspace.h>
+#include <asm/asm.h>
+#include <asm/asmmacro.h>
+#include <asm/cacheops.h>
+#include <asm/mipsregs.h>
+
+#define CACHE_SIZE (32 * 1024)
+#define CACHE_LINESIZE 32
+
+.extern jz4780_cpu_entry_sp
+.extern jz4780_cpu_entry_gp
+
+.section .text.smp-entry
+.balign 0x10000
+.set noreorder
+LEAF(jz4780_secondary_cpu_entry)
+ mtc0 zero, CP0_CAUSE
+
+ li t0, ST0_CU0
+ mtc0 t0, CP0_STATUS
+
+ /* cache setup */
+ li t0, KSEG0
+ ori t1, t0, CACHE_SIZE
+ mtc0 zero, CP0_TAGLO, 0
+1: cache Index_Store_Tag_I, 0(t0)
+ cache Index_Store_Tag_D, 0(t0)
+ bne t0, t1, 1b
+ addiu t0, t0, CACHE_LINESIZE
+
+ /* kseg0 cache attribute */
+ mfc0 t0, CP0_CONFIG, 0
+ ori t0, t0, CONF_CM_CACHABLE_NONCOHERENT
+ mtc0 t0, CP0_CONFIG, 0
+
+ /* pagemask */
+ mtc0 zero, CP0_PAGEMASK, 0
+
+ /* retrieve sp */
+ la t0, jz4780_cpu_entry_sp
+ lw sp, 0(t0)
+
+ /* retrieve gp */
+ la t0, jz4780_cpu_entry_gp
+ lw gp, 0(t0)
+
+ /* jump to the kernel in kseg0 */
+ la t0, smp_bootstrap
+ jr t0
+ nop
+ END(jz4780_secondary_cpu_entry)
diff --git a/arch/mips/jz4740/smp.c b/arch/mips/jz4740/smp.c
new file mode 100644
index 00000000..d95d22a
--- /dev/null
+++ b/arch/mips/jz4740/smp.c
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2013, Paul Burton <paul.burton@imgtec.com>
+ * JZ4780 SMP
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+#include <linux/smp.h>
+#include <linux/tick.h>
+#include <asm/mach-jz4740/smp.h>
+#include <asm/smp-ops.h>
+
+static struct clk *cpu_clock_gates[CONFIG_NR_CPUS] = { NULL };
+
+u32 jz4780_cpu_entry_sp;
+u32 jz4780_cpu_entry_gp;
+
+static struct cpumask cpu_running;
+
+static DEFINE_SPINLOCK(smp_lock);
+
+static irqreturn_t mbox_handler(int irq, void *dev_id)
+{
+ int cpu = smp_processor_id();
+ u32 action, status;
+
+ spin_lock(&smp_lock);
+
+ switch (cpu) {
+ case 0:
+ action = read_c0_mailbox0();
+ write_c0_mailbox0(0);
+ break;
+ case 1:
+ action = read_c0_mailbox1();
+ write_c0_mailbox1(0);
+ break;
+ case 2:
+ action = read_c0_mailbox2();
+ write_c0_mailbox2(0);
+ break;
+ case 3:
+ action = read_c0_mailbox3();
+ write_c0_mailbox3(0);
+ break;
+ default:
+ panic("unhandled cpu %d!", cpu);
+ }
+
+ /* clear pending mailbox interrupt */
+ status = read_c0_corestatus();
+ status &= ~(CORESTATUS_MIRQ0P << cpu);
+ write_c0_corestatus(status);
+
+ spin_unlock(&smp_lock);
+
+ if (action & SMP_RESCHEDULE_YOURSELF)
+ scheduler_ipi();
+ if (action & SMP_CALL_FUNCTION)
+ generic_smp_call_function_interrupt();
+
+ return IRQ_HANDLED;
+}
+
+static void jz4780_smp_setup(void)
+{
+ u32 addr, reim;
+ int cpu;
+
+ reim = read_c0_reim();
+
+ for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ __cpu_number_map[cpu] = cpu;
+ __cpu_logical_map[cpu] = cpu;
+ set_cpu_possible(cpu, true);
+ }
+
+ /* mask mailbox interrupts for this core */
+ reim &= ~REIM_MBOXIRQ0M;
+ write_c0_reim(reim);
+
+ /* clear mailboxes & pending mailbox IRQs */
+ write_c0_mailbox0(0);
+ write_c0_mailbox1(0);
+ write_c0_corestatus(0);
+
+ /* set reset entry point */
+ addr = KSEG1ADDR((u32)&jz4780_secondary_cpu_entry);
+ WARN_ON(addr & ~REIM_ENTRY);
+ reim &= ~REIM_ENTRY;
+ reim |= addr & REIM_ENTRY;
+
+ /* unmask mailbox interrupts for this core */
+ reim |= REIM_MBOXIRQ0M;
+ write_c0_reim(reim);
+ set_c0_status(STATUSF_IP3);
+ irq_enable_hazard();
+
+ cpumask_set_cpu(cpu, &cpu_running);
+}
+
+static void jz4780_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *cpu_node;
+ unsigned cpu, ctrl;
+ int err;
+
+ /* setup the mailbox IRQ */
+ err = request_irq(MIPS_CPU_IRQ_BASE + 3, mbox_handler,
+ IRQF_PERCPU | IRQF_NO_THREAD, "core mailbox", NULL);
+ if (err)
+ pr_err("request_irq() on core mailbox failed\n");
+
+ ctrl = read_c0_corectrl();
+
+ for_each_of_cpu_node(cpu_node) {
+ cpu = of_cpu_node_to_id(cpu_node);
+ if (cpu < 0) {
+ pr_err("Failed to read index of %s\n",
+ cpu_node->full_name);
+ continue;
+ }
+
+ /* use reset entry point from REIM register */
+ ctrl |= CORECTRL_RPC0 << cpu;
+
+ cpu_clock_gates[cpu] = of_clk_get(cpu_node, 0);
+ if (IS_ERR(cpu_clock_gates[cpu])) {
+ cpu_clock_gates[cpu] = NULL;
+ continue;
+ }
+
+ err = clk_prepare(cpu_clock_gates[cpu]);
+ if (err)
+ pr_err("Failed to prepare CPU clock gate\n");
+ }
+
+ write_c0_corectrl(ctrl);
+}
+
+static int jz4780_boot_secondary(int cpu, struct task_struct *idle)
+{
+ unsigned long flags;
+ u32 ctrl;
+
+ spin_lock_irqsave(&smp_lock, flags);
+
+ /* ensure the core is in reset */
+ ctrl = read_c0_corectrl();
+ ctrl |= CORECTRL_SWRST0 << cpu;
+ write_c0_corectrl(ctrl);
+
+ /* ungate core clock */
+ if (cpu_clock_gates[cpu])
+ clk_enable(cpu_clock_gates[cpu]);
+
+ /* set entry sp/gp register values */
+ jz4780_cpu_entry_sp = __KSTK_TOS(idle);
+ jz4780_cpu_entry_gp = (u32)task_thread_info(idle);
+ smp_wmb();
+
+ /* take the core out of reset */
+ ctrl &= ~(CORECTRL_SWRST0 << cpu);
+ write_c0_corectrl(ctrl);
+
+ cpumask_set_cpu(cpu, &cpu_running);
+
+ spin_unlock_irqrestore(&smp_lock, flags);
+
+ return 0;
+}
+
+static void jz4780_init_secondary(void)
+{
+}
+
+static void jz4780_smp_finish(void)
+{
+ u32 reim;
+
+ spin_lock(&smp_lock);
+
+ /* unmask mailbox interrupts for this core */
+ reim = read_c0_reim();
+ reim |= REIM_MBOXIRQ0M << smp_processor_id();
+ write_c0_reim(reim);
+
+ spin_unlock(&smp_lock);
+
+ /* unmask interrupts for this core */
+ change_c0_status(ST0_IM, STATUSF_IP3 | STATUSF_IP2 |
+ STATUSF_IP1 | STATUSF_IP0);
+ irq_enable_hazard();
+
+ /* force broadcast timer */
+ tick_broadcast_force();
+}
+
+static void jz4780_send_ipi_single_locked(int cpu, unsigned int action)
+{
+ u32 mbox;
+
+ switch (cpu) {
+ case 0:
+ mbox = read_c0_mailbox0();
+ write_c0_mailbox0(mbox | action);
+ break;
+ case 1:
+ mbox = read_c0_mailbox1();
+ write_c0_mailbox1(mbox | action);
+ break;
+ default:
+ panic("unhandled cpu %d!", cpu);
+ }
+}
+
+static void jz4780_send_ipi_single(int cpu, unsigned int action)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&smp_lock, flags);
+ jz4780_send_ipi_single_locked(cpu, action);
+ spin_unlock_irqrestore(&smp_lock, flags);
+}
+
+static void jz4780_send_ipi_mask(const struct cpumask *mask,
+ unsigned int action)
+{
+ unsigned long flags;
+ int cpu;
+
+ spin_lock_irqsave(&smp_lock, flags);
+
+ for_each_cpu(cpu, mask)
+ jz4780_send_ipi_single_locked(cpu, action);
+
+ spin_unlock_irqrestore(&smp_lock, flags);
+}
+
+static struct plat_smp_ops jz4780_smp_ops = {
+ .send_ipi_single = jz4780_send_ipi_single,
+ .send_ipi_mask = jz4780_send_ipi_mask,
+ .init_secondary = jz4780_init_secondary,
+ .smp_finish = jz4780_smp_finish,
+ .boot_secondary = jz4780_boot_secondary,
+ .smp_setup = jz4780_smp_setup,
+ .prepare_cpus = jz4780_smp_prepare_cpus,
+};
+
+void __init jz4780_smp_init(void)
+{
+ register_smp_ops(&jz4780_smp_ops);
+}
diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index 37f8e78..d33f2d4 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -18,6 +18,7 @@
#include <asm/cpu-type.h>
#include <asm/idle.h>
#include <asm/mipsregs.h>
+#include <asm/r4kcache.h>
/*
* Not all of the MIPS CPUs have the "wait" instruction available. Moreover,
@@ -88,6 +89,34 @@ static void __cpuidle rm7k_wait_irqoff(void)
}
/*
+ * The Ingenic jz4780 SMP variant has to write back dirty cache lines before
+ * executing wait. The CPU & cache clock will be gated until we return from
+ * the wait, and if another core attempts to access data from our data cache
+ * during this time then it will lock up.
+ */
+void jz4780_smp_wait_irqoff(void)
+{
+ unsigned long pending = read_c0_cause() & read_c0_status() & CAUSEF_IP;
+
+ /*
+ * Going to idle has a significant overhead due to the cache flush so
+ * try to avoid it if we'll immediately be woken again due to an IRQ.
+ */
+ if (!need_resched() && !pending) {
+ r4k_blast_dcache();
+
+ __asm__(
+ " .set push \n"
+ " .set mips3 \n"
+ " sync \n"
+ " wait \n"
+ " .set pop \n");
+ }
+
+ local_irq_enable();
+}
+
+/*
* Au1 'wait' is only useful when the 32kHz counter is used as timer,
* since coreclock (and the cp0 counter) stops upon executing it. Only an
* interrupt can wake it, so they must be enabled before entering idle modes.
@@ -172,7 +201,6 @@ void __init check_wait(void)
case CPU_CAVIUM_OCTEON_PLUS:
case CPU_CAVIUM_OCTEON2:
case CPU_CAVIUM_OCTEON3:
- case CPU_XBURST:
case CPU_LOONGSON32:
case CPU_XLR:
case CPU_XLP:
@@ -246,6 +274,11 @@ void __init check_wait(void)
cpu_wait = r4k_wait;
*/
break;
+ case CPU_XBURST:
+ if (IS_ENABLED(CONFIG_SMP))
+ cpu_wait = jz4780_smp_wait_irqoff;
+ else
+ cpu_wait = r4k_wait;
default:
break;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 2/6] MIPS: CI20: Modify DTS to support high resolution timer for SMP.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 0/6] Introduce SMP support for CI20 (based on JZ4780) 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 1/6] MIPS: JZ4780: Introduce SMP support 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 3/6] clocksource: Ingenic: Add high resolution timer support " 周琰杰 (Zhou Yanjie)
` (3 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Modify DTS, change tcu channel from 2 to 3, channel #0 and #1 for
per core local timer, #2 for clocksource.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
Notes:
v1->v2:
No change.
v2->v3:
No change.
v3->v4:
Rebase on top of kernel 5.6-rc1.
v4->v5:
Move [5/6] in v4 to this patch, to ensure that we can
git-bisect without ending up with a broken kernel.
v5->v6:
No change.
v6->v7:
Remove unnecessary "ingenic,pwm-channels-mask".
arch/mips/boot/dts/ingenic/ci20.dts | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
index db0ca25..06e3186 100644
--- a/arch/mips/boot/dts/ingenic/ci20.dts
+++ b/arch/mips/boot/dts/ingenic/ci20.dts
@@ -486,7 +486,12 @@
};
&tcu {
- /* 3 MHz for the system timer and clocksource */
- assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>;
- assigned-clock-rates = <3000000>, <3000000>;
+ /*
+ * 750 kHz for the system timers and clocksource,
+ * use channel #0 and #1 for the per cpu system timers,
+ * and use channel #2 for the clocksource.
+ */
+ assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>,
+ <&tcu TCU_CLK_TIMER2>;
+ assigned-clock-rates = <750000>, <750000>, <750000>;
};
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 3/6] clocksource: Ingenic: Add high resolution timer support for SMP.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
` (2 preceding siblings ...)
2020-05-13 18:46 ` [PATCH v7 2/6] MIPS: CI20: Modify DTS to support high resolution timer for SMP 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-14 14:10 ` kbuild test robot
2020-05-13 18:46 ` [PATCH v7 4/6] dt-bindings: MIPS: Document Ingenic SoCs binding 周琰杰 (Zhou Yanjie)
` (2 subsequent siblings)
6 siblings, 1 reply; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Enable clock event handling on per CPU core basis.
Make sure that interrupts raised on the first core execute
event handlers on the correct CPU core.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
Notes:
v1->v2:
1.Adjust function naming to make it more reasonable.
2.Replace function smp_call_function_single() with
smp_call_function_single_async() in order to resolve
the warning below:
[ 0.350942] smp: Brought up 1 node, 2 CPUs
[ 0.365497] ------------[ cut here ]------------
[ 0.365522] WARNING: CPU: 0 PID: 1 at kernel/smp.c:300 smp_call_function_single+0x110/0x200
[ 0.365533] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc1+ #5
[ 0.365537] Stack : 00000000 59c73bcd 00000037 80074e80 80000000 80670000 805a0000 80620590
[ 0.365557] 8065ce38 8fc0dc8c 806d0000 00000000 80670000 00000001 8fc0dc20 59c73bcd
[ 0.365574] 00000000 00000000 806f0000 80670000 00000000 806dab00 00000000 2d302e35
[ 0.365591] 203a6d6d 806e0000 806e0000 70617773 80670000 00000000 00000000 00000009
[ 0.365610] 00000000 8fc94e20 8fc0de30 80690000 00000018 803592dc 00000000 806d0000
[ 0.365627] ...
[ 0.365634] Call Trace:
[ 0.365647] [<8001b9a0>] show_stack+0x6c/0x12c
[ 0.365663] [<804aed20>] dump_stack+0x98/0xc8
[ 0.365673] [<8003044c>] __warn+0xc4/0xe8
[ 0.365682] [<800304f4>] warn_slowpath_fmt+0x84/0xb8
[ 0.365690] [<800a886c>] smp_call_function_single+0x110/0x200
[ 0.365703] ---[ end trace 5785856ca39c79d5 ]---
[ 0.365557] 8065ce38 8fc0dc8c 806d0000 00000000 80670000 00000001 8fc0dc20 59c73bcd
[ 0.365574] 00000000 00000000 806f0000 80670000 00000000 806dab00 00000000 2d302e35
[ 0.365591] 203a6d6d 806e0000 806e0000 70617773 80670000 00000000 00000000 00000009
[ 0.365610] 00000000 8fc94e20 8fc0de30 80690000 00000018 803592dc 00000000 806d0000
[ 0.365627] ...
[ 0.365634] Call Trace:
[ 0.365647] [<8001b9a0>] show_stack+0x6c/0x12c
[ 0.365663] [<804aed20>] dump_stack+0x98/0xc8
[ 0.365673] [<8003044c>] __warn+0xc4/0xe8
[ 0.365682] [<800304f4>] warn_slowpath_fmt+0x84/0xb8
[ 0.365690] [<800a886c>] smp_call_function_single+0x110/0x200
[ 0.365703] ---[ end trace 5785856ca39c79d5 ]---
v2->v3:
No Change.
v3->v4:
Rebase on top of kernel 5.6-rc1.
v4->v5:
Move the check for (evt->event_handler) from "ingenic_per_cpu_event_handler"
to "ingenic_tcu_cevt_cb".
v5->v6:
No change.
v6->v7:
Remove unnecessary check for "NR_CPUS > 1".
drivers/clocksource/ingenic-timer.c | 103 ++++++++++++++++++++++++++++--------
1 file changed, 82 insertions(+), 21 deletions(-)
diff --git a/drivers/clocksource/ingenic-timer.c b/drivers/clocksource/ingenic-timer.c
index 4963336..9aae939 100644
--- a/drivers/clocksource/ingenic-timer.c
+++ b/drivers/clocksource/ingenic-timer.c
@@ -1,7 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * JZ47xx SoCs TCU IRQ driver
+ * XBurst SoCs TCU IRQ driver
* Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net>
+ * Copyright (C) 2020 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
*/
#include <linux/bitops.h>
@@ -21,18 +22,23 @@
#include <dt-bindings/clock/ingenic,tcu.h>
+static DEFINE_PER_CPU(call_single_data_t, ingenic_cevt_csd);
+
struct ingenic_soc_info {
unsigned int num_channels;
};
struct ingenic_tcu {
struct regmap *map;
+ struct device_node *np;
struct clk *timer_clk, *cs_clk;
+ unsigned int timer_local[NR_CPUS];
unsigned int timer_channel, cs_channel;
struct clock_event_device cevt;
struct clocksource cs;
- char name[4];
+ char name[8];
unsigned long pwm_channels_mask;
+ int cpu;
};
static struct ingenic_tcu *ingenic_tcu;
@@ -81,6 +87,24 @@ static int ingenic_tcu_cevt_set_next(unsigned long next,
return 0;
}
+static void ingenic_per_cpu_event_handler(void *info)
+{
+ struct clock_event_device *cevt = (struct clock_event_device *) info;
+
+ cevt->event_handler(cevt);
+}
+
+static void ingenic_tcu_per_cpu_cb(struct clock_event_device *evt)
+{
+ struct ingenic_tcu *tcu = to_ingenic_tcu(evt);
+ call_single_data_t *csd;
+
+ csd = &per_cpu(ingenic_cevt_csd, tcu->cpu);
+ csd->info = (void *) evt;
+ csd->func = ingenic_per_cpu_event_handler;
+ smp_call_function_single_async(tcu->cpu, csd);
+}
+
static irqreturn_t ingenic_tcu_cevt_cb(int irq, void *dev_id)
{
struct clock_event_device *evt = dev_id;
@@ -89,7 +113,7 @@ static irqreturn_t ingenic_tcu_cevt_cb(int irq, void *dev_id)
regmap_write(tcu->map, TCU_REG_TECR, BIT(tcu->timer_channel));
if (evt->event_handler)
- evt->event_handler(evt);
+ ingenic_tcu_per_cpu_cb(evt);
return IRQ_HANDLED;
}
@@ -105,14 +129,21 @@ static struct clk * __init ingenic_tcu_get_clock(struct device_node *np, int id)
return of_clk_get_from_provider(&args);
}
-static int __init ingenic_tcu_timer_init(struct device_node *np,
- struct ingenic_tcu *tcu)
+static int ingenic_tcu_setup_per_cpu_cevt(struct device_node *np,
+ unsigned int channel)
{
- unsigned int timer_virq, channel = tcu->timer_channel;
+ unsigned int timer_virq;
struct irq_domain *domain;
+ struct ingenic_tcu *tcu;
unsigned long rate;
int err;
+ tcu = kzalloc(sizeof(*tcu), GFP_KERNEL);
+ if (!tcu)
+ return -ENOMEM;
+
+ tcu->map = ingenic_tcu->map;
+
tcu->timer_clk = ingenic_tcu_get_clock(np, channel);
if (IS_ERR(tcu->timer_clk))
return PTR_ERR(tcu->timer_clk);
@@ -139,13 +170,15 @@ static int __init ingenic_tcu_timer_init(struct device_node *np,
goto err_clk_disable;
}
- snprintf(tcu->name, sizeof(tcu->name), "TCU");
+ snprintf(tcu->name, sizeof(tcu->name), "TCU%u", channel);
err = request_irq(timer_virq, ingenic_tcu_cevt_cb, IRQF_TIMER,
tcu->name, &tcu->cevt);
if (err)
goto err_irq_dispose_mapping;
+ tcu->cpu = smp_processor_id();
+ tcu->timer_channel = channel;
tcu->cevt.cpumask = cpumask_of(smp_processor_id());
tcu->cevt.features = CLOCK_EVT_FEAT_ONESHOT;
tcu->cevt.name = tcu->name;
@@ -166,6 +199,25 @@ static int __init ingenic_tcu_timer_init(struct device_node *np,
return err;
}
+static int ingenic_tcu_setup_cevt(unsigned int cpu)
+{
+ int ret;
+
+ ret = ingenic_tcu_setup_per_cpu_cevt(ingenic_tcu->np,
+ ingenic_tcu->timer_local[cpu]);
+ if (ret)
+ goto err_tcu_clocksource_cleanup;
+
+ return 0;
+
+err_tcu_clocksource_cleanup:
+ clocksource_unregister(&ingenic_tcu->cs);
+ clk_disable_unprepare(ingenic_tcu->cs_clk);
+ clk_put(ingenic_tcu->cs_clk);
+ kfree(ingenic_tcu);
+ return ret;
+}
+
static int __init ingenic_tcu_clocksource_init(struct device_node *np,
struct ingenic_tcu *tcu)
{
@@ -240,6 +292,7 @@ static int __init ingenic_tcu_init(struct device_node *np)
const struct ingenic_soc_info *soc_info = id->data;
struct ingenic_tcu *tcu;
struct regmap *map;
+ unsigned cpu = 0;
long rate;
int ret;
@@ -253,13 +306,18 @@ static int __init ingenic_tcu_init(struct device_node *np)
if (!tcu)
return -ENOMEM;
- /* Enable all TCU channels for PWM use by default except channels 0/1 */
- tcu->pwm_channels_mask = GENMASK(soc_info->num_channels - 1, 2);
+ /*
+ * Enable all TCU channels for PWM use by default except channels 0/1,
+ * and channel 2 if target CPU is JZ4780 and SMP is selected.
+ */
+ tcu->pwm_channels_mask = GENMASK(soc_info->num_channels - 1,
+ NR_CPUS + 1);
of_property_read_u32(np, "ingenic,pwm-channels-mask",
(u32 *)&tcu->pwm_channels_mask);
- /* Verify that we have at least two free channels */
- if (hweight8(tcu->pwm_channels_mask) > soc_info->num_channels - 2) {
+ /* Verify that we have at least NR_CPUS + 1 free channels */
+ if (hweight8(tcu->pwm_channels_mask) >
+ soc_info->num_channels - NR_CPUS + 1) {
pr_crit("%s: Invalid PWM channel mask: 0x%02lx\n", __func__,
tcu->pwm_channels_mask);
ret = -EINVAL;
@@ -267,13 +325,19 @@ static int __init ingenic_tcu_init(struct device_node *np)
}
tcu->map = map;
+ tcu->np = np;
ingenic_tcu = tcu;
- tcu->timer_channel = find_first_zero_bit(&tcu->pwm_channels_mask,
+ tcu->timer_local[cpu] = find_first_zero_bit(&tcu->pwm_channels_mask,
soc_info->num_channels);
+
+ for (cpu = 1; cpu < NR_CPUS; cpu++)
+ tcu->timer_local[cpu] = find_next_zero_bit(
+ &tcu->pwm_channels_mask, soc_info->num_channels,
+ tcu->timer_local[cpu - 1] + 1);
+
tcu->cs_channel = find_next_zero_bit(&tcu->pwm_channels_mask,
- soc_info->num_channels,
- tcu->timer_channel + 1);
+ soc_info->num_channels, tcu->timer_local[cpu - 1] + 1);
ret = ingenic_tcu_clocksource_init(np, tcu);
if (ret) {
@@ -281,9 +345,10 @@ static int __init ingenic_tcu_init(struct device_node *np)
goto err_free_ingenic_tcu;
}
- ret = ingenic_tcu_timer_init(np, tcu);
- if (ret)
- goto err_tcu_clocksource_cleanup;
+ /* Setup clock events on each CPU core */
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "Ingenic XBurst: online",
+ ingenic_tcu_setup_cevt, NULL);
+ WARN_ON(ret < 0);
/* Register the sched_clock at the end as there's no way to undo it */
rate = clk_get_rate(tcu->cs_clk);
@@ -291,10 +356,6 @@ static int __init ingenic_tcu_init(struct device_node *np)
return 0;
-err_tcu_clocksource_cleanup:
- clocksource_unregister(&tcu->cs);
- clk_disable_unprepare(tcu->cs_clk);
- clk_put(tcu->cs_clk);
err_free_ingenic_tcu:
kfree(tcu);
return ret;
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH v7 3/6] clocksource: Ingenic: Add high resolution timer support for SMP.
2020-05-13 18:46 ` [PATCH v7 3/6] clocksource: Ingenic: Add high resolution timer support " 周琰杰 (Zhou Yanjie)
@ 2020-05-14 14:10 ` kbuild test robot
0 siblings, 0 replies; 9+ messages in thread
From: kbuild test robot @ 2020-05-14 14:10 UTC (permalink / raw)
To: 周琰杰 (Zhou Yanjie), linux-mips
Cc: kbuild-all, linux-kernel, devicetree, tsbogend, paulburton,
jiaxun.yang, chenhc, tglx, robh+dt, daniel.lezcano
[-- Attachment #1: Type: text/plain, Size: 4424 bytes --]
Hi "周琰杰,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on robh/for-next]
[also build test WARNING on tip/timers/core linus/master v5.7-rc5]
[cannot apply to linux/master next-20200512]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Introduce-SMP-support-for-CI20-based-on-JZ4780/20200514-171836
base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
In file included from include/linux/bitops.h:5:0,
from drivers/clocksource/ingenic-timer.c:8:
drivers/clocksource/ingenic-timer.c: In function 'ingenic_tcu_init':
>> include/linux/bits.h:36:22: warning: left shift count >= width of type [-Wshift-count-overflow]
(((~UL(0)) - (UL(1) << (l)) + 1) & ^
>> include/linux/bits.h:39:31: note: in expansion of macro '__GENMASK'
(GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
^~~~~~~~~
>> drivers/clocksource/ingenic-timer.c:313:27: note: in expansion of macro 'GENMASK'
tcu->pwm_channels_mask = GENMASK(soc_info->num_channels - 1,
^~~~~~~
vim +/GENMASK +313 drivers/clocksource/ingenic-timer.c
288
289 static int __init ingenic_tcu_init(struct device_node *np)
290 {
291 const struct of_device_id *id = of_match_node(ingenic_tcu_of_match, np);
292 const struct ingenic_soc_info *soc_info = id->data;
293 struct ingenic_tcu *tcu;
294 struct regmap *map;
295 unsigned cpu = 0;
296 long rate;
297 int ret;
298
299 of_node_clear_flag(np, OF_POPULATED);
300
301 map = device_node_to_regmap(np);
302 if (IS_ERR(map))
303 return PTR_ERR(map);
304
305 tcu = kzalloc(sizeof(*tcu), GFP_KERNEL);
306 if (!tcu)
307 return -ENOMEM;
308
309 /*
310 * Enable all TCU channels for PWM use by default except channels 0/1,
311 * and channel 2 if target CPU is JZ4780 and SMP is selected.
312 */
> 313 tcu->pwm_channels_mask = GENMASK(soc_info->num_channels - 1,
314 NR_CPUS + 1);
315 of_property_read_u32(np, "ingenic,pwm-channels-mask",
316 (u32 *)&tcu->pwm_channels_mask);
317
318 /* Verify that we have at least NR_CPUS + 1 free channels */
319 if (hweight8(tcu->pwm_channels_mask) >
320 soc_info->num_channels - NR_CPUS + 1) {
321 pr_crit("%s: Invalid PWM channel mask: 0x%02lx\n", __func__,
322 tcu->pwm_channels_mask);
323 ret = -EINVAL;
324 goto err_free_ingenic_tcu;
325 }
326
327 tcu->map = map;
328 tcu->np = np;
329 ingenic_tcu = tcu;
330
331 tcu->timer_local[cpu] = find_first_zero_bit(&tcu->pwm_channels_mask,
332 soc_info->num_channels);
333
334 for (cpu = 1; cpu < NR_CPUS; cpu++)
335 tcu->timer_local[cpu] = find_next_zero_bit(
336 &tcu->pwm_channels_mask, soc_info->num_channels,
337 tcu->timer_local[cpu - 1] + 1);
338
339 tcu->cs_channel = find_next_zero_bit(&tcu->pwm_channels_mask,
340 soc_info->num_channels, tcu->timer_local[cpu - 1] + 1);
341
342 ret = ingenic_tcu_clocksource_init(np, tcu);
343 if (ret) {
344 pr_crit("%s: Unable to init clocksource: %d\n", __func__, ret);
345 goto err_free_ingenic_tcu;
346 }
347
348 /* Setup clock events on each CPU core */
349 ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "Ingenic XBurst: online",
350 ingenic_tcu_setup_cevt, NULL);
351 WARN_ON(ret < 0);
352
353 /* Register the sched_clock at the end as there's no way to undo it */
354 rate = clk_get_rate(tcu->cs_clk);
355 sched_clock_register(ingenic_tcu_timer_read, 16, rate);
356
357 return 0;
358
359 err_free_ingenic_tcu:
360 kfree(tcu);
361 return ret;
362 }
363
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 72336 bytes --]
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v7 4/6] dt-bindings: MIPS: Document Ingenic SoCs binding.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
` (3 preceding siblings ...)
2020-05-13 18:46 ` [PATCH v7 3/6] clocksource: Ingenic: Add high resolution timer support " 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 5/6] MIPS: Ingenic: Add 'cpus' node for Ingenic SoCs 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 6/6] MIPS: CI20: Update defconfig to support SMP 周琰杰 (Zhou Yanjie)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Document the available properties for the SoC root node and the
CPU nodes of the devicetree for the Ingenic XBurst SoCs.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
Notes:
v1->v2:
Change the two Document from txt to yaml.
v2->v3:
Fix formatting errors.
v3->v4:
Fix bugs in the two yaml files.
v4->v5:
No change.
v5->v6:
Rewrite the two yaml files.
v6->v7:
1.Update compatible strings in "ingenic,cpu.yaml".
2.Fix formatting errors, and enum for compatible strings.
3.Remove unnecessary "ingenic,soc.yaml".
.../bindings/mips/ingenic/ingenic,cpu.yaml | 57 ++++++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
diff --git a/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml b/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
new file mode 100644
index 00000000..afb0207
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mips/ingenic/ingenic,cpu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for Ingenic XBurst family CPUs
+
+maintainers:
+ - 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
+
+description:
+ Ingenic XBurst family CPUs shall have the following properties.
+
+properties:
+ compatible:
+ oneOf:
+
+ - description: Ingenic XBurst®1 CPU Cores
+ items:
+ enum:
+ - ingenic,xburst-mxu1.0
+ - ingenic,xburst-fpu1.0-mxu1.1
+ - ingenic,xburst-fpu2.0-mxu2.0
+
+ - description: Ingenic XBurst®2 CPU Cores
+ items:
+ enum:
+ - ingenic,xburst2-fpu2.1-mxu2.1-smt
+
+ reg:
+ maxItems: 1
+
+required:
+ - device_type
+ - compatible
+ - reg
+
+examples:
+ - |
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <0>;
+ };
+
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <1>;
+ };
+ };
+...
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 5/6] MIPS: Ingenic: Add 'cpus' node for Ingenic SoCs.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
` (4 preceding siblings ...)
2020-05-13 18:46 ` [PATCH v7 4/6] dt-bindings: MIPS: Document Ingenic SoCs binding 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
2020-05-13 18:46 ` [PATCH v7 6/6] MIPS: CI20: Update defconfig to support SMP 周琰杰 (Zhou Yanjie)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Add 'cpus' node to the jz4740.dtsi, jz4770.dtsi, jz4780.dtsi
and x1000.dtsi files.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
Notes:
v1->v2:
No change.
v2->v3:
No change.
v3->v4:
Rebase on top of kernel 5.6-rc1.
v4->v5:
No change.
v5->v6:
No change.
v6->v7:
Update compatible strings.
arch/mips/boot/dts/ingenic/jz4740.dtsi | 14 ++++++++++++++
arch/mips/boot/dts/ingenic/jz4770.dtsi | 15 ++++++++++++++-
arch/mips/boot/dts/ingenic/jz4780.dtsi | 23 +++++++++++++++++++++++
arch/mips/boot/dts/ingenic/x1000.dtsi | 14 ++++++++++++++
4 files changed, 65 insertions(+), 1 deletion(-)
diff --git a/arch/mips/boot/dts/ingenic/jz4740.dtsi b/arch/mips/boot/dts/ingenic/jz4740.dtsi
index a3301ba..1f2f896 100644
--- a/arch/mips/boot/dts/ingenic/jz4740.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4740.dtsi
@@ -7,6 +7,20 @@
#size-cells = <1>;
compatible = "ingenic,jz4740";
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-mxu1.0";
+ reg = <0>;
+
+ clocks = <&cgu JZ4740_CLK_CCLK>;
+ clock-names = "cpu";
+ };
+ };
+
cpuintc: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
diff --git a/arch/mips/boot/dts/ingenic/jz4770.dtsi b/arch/mips/boot/dts/ingenic/jz4770.dtsi
index 0bfb9ed..12c7101 100644
--- a/arch/mips/boot/dts/ingenic/jz4770.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4770.dtsi
@@ -1,5 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
-
#include <dt-bindings/clock/jz4770-cgu.h>
/ {
@@ -7,6 +6,20 @@
#size-cells = <1>;
compatible = "ingenic,jz4770";
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <0>;
+
+ clocks = <&cgu JZ4770_CLK_CCLK>;
+ clock-names = "cpu";
+ };
+ };
+
cpuintc: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi b/arch/mips/boot/dts/ingenic/jz4780.dtsi
index bb89653..03aeeff 100644
--- a/arch/mips/boot/dts/ingenic/jz4780.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
@@ -8,6 +8,29 @@
#size-cells = <1>;
compatible = "ingenic,jz4780";
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <0>;
+
+ clocks = <&cgu JZ4780_CLK_CPU>;
+ clock-names = "cpu";
+ };
+
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <1>;
+
+ clocks = <&cgu JZ4780_CLK_CORE1>;
+ clock-names = "cpu";
+ };
+ };
+
cpuintc: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi b/arch/mips/boot/dts/ingenic/x1000.dtsi
index 147f7d5..2205e1b 100644
--- a/arch/mips/boot/dts/ingenic/x1000.dtsi
+++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
@@ -8,6 +8,20 @@
#size-cells = <1>;
compatible = "ingenic,x1000", "ingenic,x1000e";
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+ reg = <0>;
+
+ clocks = <&cgu X1000_CLK_CPU>;
+ clock-names = "cpu";
+ };
+ };
+
cpuintc: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 6/6] MIPS: CI20: Update defconfig to support SMP.
2020-05-13 18:46 Introduce SMP support for CI20 (based on JZ4780) v7 周琰杰 (Zhou Yanjie)
` (5 preceding siblings ...)
2020-05-13 18:46 ` [PATCH v7 5/6] MIPS: Ingenic: Add 'cpus' node for Ingenic SoCs 周琰杰 (Zhou Yanjie)
@ 2020-05-13 18:46 ` 周琰杰 (Zhou Yanjie)
6 siblings, 0 replies; 9+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2020-05-13 18:46 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, devicetree, tsbogend, paulburton, jiaxun.yang,
chenhc, tglx, robh+dt, daniel.lezcano, keescook, paul, krzk, hns,
ebiederm, dongsheng.qiu, yanfei.li, sernia.zhou, zhenwenjin
Add "CONFIG_SMP=y" and "CONFIG_NR_CPUS=2" to support SMP.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---
Notes:
v1->v2:
No change.
v2->v3:
No change.
v3->v4:
Rebase on top of kernel 5.6-rc1.
v4->v5:
No change.
v5->v6:
No change.
v6->v7:
No change.
arch/mips/configs/ci20_defconfig | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/configs/ci20_defconfig b/arch/mips/configs/ci20_defconfig
index 0db0088..c8dd136 100644
--- a/arch/mips/configs/ci20_defconfig
+++ b/arch/mips/configs/ci20_defconfig
@@ -1,3 +1,5 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=2
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_MODULES=y
CONFIG_KERNEL_XZ=y
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread