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kernel/0137-feat-Introduce-system-suspend-support.patch

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From 527126cf42f3a79ea292a5e9aba9a2529ffcbd78 Mon Sep 17 00:00:00 2001
From: huangyifeng <huangyifeng@eswincomputing.com>
Date: Thu, 1 Aug 2024 16:47:31 +0800
Subject: [PATCH 137/219] feat:Introduce system suspend support
Changelogs: eic770x support suspend to mem.
When the SUSP SBI extension is present it implies that the standard
"suspend to RAM" type is available. Wire it up to the generic
platform suspend support, also applying the already present support
for non-retentive CPU suspend. When the kernel is built with
CONFIG_SUSPEND, one can do 'echo mem > /sys/power/state' to suspend.
Resumption will occur when a platform-specific wake-up event arrives.
(Based on the patch 20231012072148.7010-3-ajones@ventanamicro.com)
Signed-off-by: huangyifeng <huangyifeng@eswincomputing.com>
---
arch/riscv/Kconfig | 2 +-
arch/riscv/boot/dts/eswin/eic7700-evb-a2.dts | 4 +
arch/riscv/boot/dts/eswin/eic7700-evb.dts | 4 +
.../boot/dts/eswin/hifive-premier-550.dts | 4 +
arch/riscv/include/asm/sbi.h | 9 ++
drivers/iommu/eswin/eswin-win2030-sid.c | 2 +-
drivers/soc/eswin/Makefile | 3 +-
drivers/soc/eswin/pm_eic770x.c | 82 +++++++++++++++++++
8 files changed, 107 insertions(+), 3 deletions(-)
create mode 100644 drivers/soc/eswin/pm_eic770x.c
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index baefecd75016..1db237dc24cf 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -64,7 +64,7 @@ config RISCV
select CLINT_TIMER if !MMU
select CLONE_BACKWARDS
select COMMON_CLK
- select CPU_PM if CPU_IDLE || HIBERNATION
+ select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND
select EDAC_SUPPORT
select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)
select GENERIC_ARCH_TOPOLOGY
diff --git a/arch/riscv/boot/dts/eswin/eic7700-evb-a2.dts b/arch/riscv/boot/dts/eswin/eic7700-evb-a2.dts
index c6927bc6814f..120fc44ae3f8 100644
--- a/arch/riscv/boot/dts/eswin/eic7700-evb-a2.dts
+++ b/arch/riscv/boot/dts/eswin/eic7700-evb-a2.dts
@@ -53,6 +53,10 @@ aliases {
chosen {
stdout-path = "serial0:115200n8";
+ opensbi_domain_config: domain-config {
+ compatible = "opensbi,domain,config";
+ system-suspend-test;
+ };
};
cpus {
diff --git a/arch/riscv/boot/dts/eswin/eic7700-evb.dts b/arch/riscv/boot/dts/eswin/eic7700-evb.dts
index 0e10a72e31ec..5171c76ec825 100644
--- a/arch/riscv/boot/dts/eswin/eic7700-evb.dts
+++ b/arch/riscv/boot/dts/eswin/eic7700-evb.dts
@@ -52,6 +52,10 @@ aliases {
chosen {
stdout-path = "serial0:115200n8";
+ opensbi_domain_config: domain-config {
+ compatible = "opensbi,domain,config";
+ system-suspend-test;
+ };
};
cpus {
diff --git a/arch/riscv/boot/dts/eswin/hifive-premier-550.dts b/arch/riscv/boot/dts/eswin/hifive-premier-550.dts
index 5dd4d1e4380b..db6520a2e6de 100644
--- a/arch/riscv/boot/dts/eswin/hifive-premier-550.dts
+++ b/arch/riscv/boot/dts/eswin/hifive-premier-550.dts
@@ -50,6 +50,10 @@ aliases {
chosen {
stdout-path = "serial0:115200n8";
+ opensbi_domain_config: domain-config {
+ compatible = "opensbi,domain,config";
+ system-suspend-test;
+ };
};
cpus {
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 3ed853b8a8c8..8d261a317175 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -29,6 +29,7 @@ enum sbi_ext_id {
SBI_EXT_RFENCE = 0x52464E43,
SBI_EXT_HSM = 0x48534D,
SBI_EXT_SRST = 0x53525354,
+ SBI_EXT_SUSP = 0x53555350,
SBI_EXT_PMU = 0x504D55,
/* Experimentals extensions must lie within this range */
@@ -113,6 +114,14 @@ enum sbi_srst_reset_reason {
SBI_SRST_RESET_REASON_SYS_FAILURE,
};
+enum sbi_ext_susp_fid {
+ SBI_EXT_SUSP_SYSTEM_SUSPEND = 0,
+};
+
+enum sbi_ext_susp_sleep_type {
+ SBI_SUSP_SLEEP_TYPE_SUSPEND_TO_RAM = 0,
+};
+
enum sbi_ext_pmu_fid {
SBI_EXT_PMU_NUM_COUNTERS = 0,
SBI_EXT_PMU_COUNTER_GET_INFO,
diff --git a/drivers/iommu/eswin/eswin-win2030-sid.c b/drivers/iommu/eswin/eswin-win2030-sid.c
index 6d8602c47805..8e89b75e71ea 100644
--- a/drivers/iommu/eswin/eswin-win2030-sid.c
+++ b/drivers/iommu/eswin/eswin-win2030-sid.c
@@ -754,7 +754,7 @@ int win2030_tbu_power(struct device *dev, bool is_powerUp)
pr_err("%s:%d, NUMA_NO_NODE\n", __func__, __LINE__);
return -EFAULT;
#else
- pr_info("%s:%d, NUMA_NO_NODE, single DIE\n", __func__, __LINE__);
+ pr_debug("%s:%d, NUMA_NO_NODE, single DIE\n", __func__, __LINE__);
nid = 0;
#endif
}
diff --git a/drivers/soc/eswin/Makefile b/drivers/soc/eswin/Makefile
index bc4e41370dc1..391ab603d23a 100644
--- a/drivers/soc/eswin/Makefile
+++ b/drivers/soc/eswin/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_ESWIN_KHANDLE) += eswin-khandle.o
obj-$(CONFIG_ESWIN_DSP_SUBSYS) += dsp_subsys.o
-obj-y += ai_driver/
\ No newline at end of file
+obj-y += ai_driver/
+obj-$(CONFIG_SUSPEND) += pm_eic770x.o
\ No newline at end of file
diff --git a/drivers/soc/eswin/pm_eic770x.c b/drivers/soc/eswin/pm_eic770x.c
new file mode 100644
index 000000000000..ac5aa4928b6c
--- /dev/null
+++ b/drivers/soc/eswin/pm_eic770x.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Power Magagement Driver For ESWIN EIC770x SOC
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that 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, see <https://www.gnu.org/licenses/>.
+ *
+ * Authors: HuangYiFeng<huangyifeng@eswincomputing.com>
+ */
+#include <linux/cpu.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+#include <asm/suspend.h>
+#include <asm/sbi.h>
+
+static int eic770x_system_suspend(unsigned long sleep_type,
+ unsigned long resume_addr,
+ unsigned long opaque)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_SUSP, SBI_EXT_SUSP_SYSTEM_SUSPEND,
+ sleep_type, resume_addr, opaque, 0, 0, 0);
+ if (ret.error)
+ return sbi_err_map_linux_errno(ret.error);
+
+ return ret.value;
+}
+
+static int eic770x_system_suspend_enter(suspend_state_t state)
+{
+ int ret;
+
+ pr_info("[%s %d]:\n",__func__,__LINE__);
+ /*
+ /*
+ Add codes that need to be performed for pm_enter. such as:
+ 1.map the wakeup irq to mailbox box irq
+ 2.notify the lpcpu to enter self refresh
+
+ ret = eic770x_lpcpu_notify(data, PM_SUSPEND_MEM_ENTER);
+ if (ret) {
+ pr_err("[%s %d]:\n",__func__,__LINE__, ret);
+ return ret
+ }
+ */
+ return cpu_suspend(SBI_SUSP_SLEEP_TYPE_SUSPEND_TO_RAM, eic770x_system_suspend);
+}
+
+static const struct platform_suspend_ops eic770x_system_suspend_ops = {
+ .valid = suspend_valid_only_mem,
+ .enter = eic770x_system_suspend_enter,
+};
+
+static int __init eic770x_system_suspend_init(void)
+{
+ pr_info("[%s %d]:\n",__func__,__LINE__);
+ if (!sbi_spec_is_0_1() && sbi_probe_extension(SBI_EXT_SUSP) > 0) {
+ pr_info("SBI SUSP extension detected\n");
+ if (IS_ENABLED(CONFIG_SUSPEND))
+ suspend_set_ops(&eic770x_system_suspend_ops);
+ }
+
+ return 0;
+}
+
+arch_initcall(eic770x_system_suspend_init);
--
2.47.0
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