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Message-Id: <20220829062202.3287-3-zong.li@sifive.com>
Date: Mon, 29 Aug 2022 06:22:01 +0000
From: Zong Li <zong.li@...ive.com>
To: robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
palmer@...belt.com, paul.walmsley@...ive.com,
aou@...s.berkeley.edu, greentime.hu@...ive.com,
conor.dooley@...rochip.com, devicetree@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Zong Li <zong.li@...ive.com>
Subject: [PATCH 2/3] soc: sifive: l2 cache: Rename SiFive L2 cache to composible cache.
From: Greentime Hu <greentime.hu@...ive.com>
Since composible cache may be L3 cache if pL2 cache exists, we should use
its original name composible cache to prevent confusion.
Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
Signed-off-by: Zong Li <zong.li@...ive.com>
---
drivers/soc/sifive/Kconfig | 7 +-
drivers/soc/sifive/Makefile | 2 +-
drivers/soc/sifive/sifive_ccache.c | 221 +++++++++++++++++++++++++
drivers/soc/sifive/sifive_l2_cache.c | 237 ---------------------------
include/soc/sifive/sifive_ccache.h | 16 ++
include/soc/sifive/sifive_l2_cache.h | 16 --
6 files changed, 242 insertions(+), 257 deletions(-)
create mode 100644 drivers/soc/sifive/sifive_ccache.c
delete mode 100644 drivers/soc/sifive/sifive_l2_cache.c
create mode 100644 include/soc/sifive/sifive_ccache.h
delete mode 100644 include/soc/sifive/sifive_l2_cache.h
diff --git a/drivers/soc/sifive/Kconfig b/drivers/soc/sifive/Kconfig
index 58cf8c40d08d..3d65d2771f9a 100644
--- a/drivers/soc/sifive/Kconfig
+++ b/drivers/soc/sifive/Kconfig
@@ -2,9 +2,10 @@
if SOC_SIFIVE
-config SIFIVE_L2
- bool "Sifive L2 Cache controller"
+config SIFIVE_CCACHE
+ bool "Sifive composable Cache controller"
+ default y
help
- Support for the L2 cache controller on SiFive platforms.
+ Support for the composable cache controller on SiFive platforms.
endif
diff --git a/drivers/soc/sifive/Makefile b/drivers/soc/sifive/Makefile
index b5caff77938f..1f5dc339bf82 100644
--- a/drivers/soc/sifive/Makefile
+++ b/drivers/soc/sifive/Makefile
@@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_SIFIVE_L2) += sifive_l2_cache.o
+obj-$(CONFIG_SIFIVE_CCACHE) += sifive_ccache.o
diff --git a/drivers/soc/sifive/sifive_ccache.c b/drivers/soc/sifive/sifive_ccache.c
new file mode 100644
index 000000000000..46ce33db7d30
--- /dev/null
+++ b/drivers/soc/sifive/sifive_ccache.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SiFive composable cache controller Driver
+ *
+ * Copyright (C) 2018-2019 SiFive, Inc.
+ *
+ */
+#include <linux/debugfs.h>
+#include <linux/interrupt.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/device.h>
+#include <asm/cacheinfo.h>
+#include <soc/sifive/sifive_ccache.h>
+
+#define SIFIVE_CCACHE_DIRECCFIX_LOW 0x100
+#define SIFIVE_CCACHE_DIRECCFIX_HIGH 0x104
+#define SIFIVE_CCACHE_DIRECCFIX_COUNT 0x108
+
+#define SIFIVE_CCACHE_DATECCFIX_LOW 0x140
+#define SIFIVE_CCACHE_DATECCFIX_HIGH 0x144
+#define SIFIVE_CCACHE_DATECCFIX_COUNT 0x148
+
+#define SIFIVE_CCACHE_DATECCFAIL_LOW 0x160
+#define SIFIVE_CCACHE_DATECCFAIL_HIGH 0x164
+#define SIFIVE_CCACHE_DATECCFAIL_COUNT 0x168
+
+#define SIFIVE_CCACHE_CONFIG 0x00
+#define SIFIVE_CCACHE_WAYENABLE 0x08
+#define SIFIVE_CCACHE_ECCINJECTERR 0x40
+
+#define SIFIVE_CCACHE_MAX_ECCINTR 3
+
+static void __iomem *ccache_base;
+static int level;
+static int g_irq[SIFIVE_CCACHE_MAX_ECCINTR];
+static struct riscv_cacheinfo_ops ccache_cache_ops;
+
+enum {
+ DIR_CORR = 0,
+ DATA_CORR,
+ DATA_UNCORR,
+};
+
+#ifdef CONFIG_DEBUG_FS
+static struct dentry *sifive_test;
+
+static ssize_t ccache_write(struct file *file, const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ unsigned int val;
+
+ if (kstrtouint_from_user(data, count, 0, &val))
+ return -EINVAL;
+ if ((val < 0xFF) || (val >= 0x10000 && val < 0x100FF))
+ writel(val, ccache_base + SIFIVE_CCACHE_ECCINJECTERR);
+ else
+ return -EINVAL;
+ return count;
+}
+
+static const struct file_operations ccache_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .write = ccache_write
+};
+
+static void setup_sifive_debug(void)
+{
+ sifive_test = debugfs_create_dir("sifive_ccache_cache", NULL);
+
+ debugfs_create_file("sifive_debug_inject_error", 0200,
+ sifive_test, NULL, &ccache_fops);
+}
+#endif
+
+static void ccache_config_read(void)
+{
+ u32 regval, val;
+
+ regval = readl(ccache_base + SIFIVE_CCACHE_CONFIG);
+ val = regval & 0xFF;
+ pr_info("CCACHE: No. of Banks in the cache: %d\n", val);
+ val = (regval & 0xFF00) >> 8;
+ pr_info("CCACHE: No. of ways per bank: %d\n", val);
+ val = (regval & 0xFF0000) >> 16;
+ pr_info("CCACHE: Sets per bank: %llu\n", (uint64_t)1 << val);
+ val = (regval & 0xFF000000) >> 24;
+ pr_info("CCACHE: Bytes per cache block: %llu\n", (uint64_t)1 << val);
+
+ regval = readl(ccache_base + SIFIVE_CCACHE_WAYENABLE);
+ pr_info("CCACHE: Index of the largest way enabled: %d\n", regval);
+}
+
+static const struct of_device_id sifive_ccache_ids[] = {
+ { .compatible = "sifive,fu540-c000-ccache" },
+ { .compatible = "sifive,ccache0" },
+ { /* end of table */ },
+};
+
+static ATOMIC_NOTIFIER_HEAD(ccache_err_chain);
+
+int register_sifive_ccache_error_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&ccache_err_chain, nb);
+}
+EXPORT_SYMBOL_GPL(register_sifive_ccache_error_notifier);
+
+int unregister_sifive_ccache_error_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&ccache_err_chain, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_sifive_ccache_error_notifier);
+
+static int ccache_largest_wayenabled(void)
+{
+ return readl(ccache_base + SIFIVE_CCACHE_WAYENABLE) & 0xFF;
+}
+
+static ssize_t number_of_ways_enabled_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", ccache_largest_wayenabled());
+}
+
+static DEVICE_ATTR_RO(number_of_ways_enabled);
+
+static struct attribute *priv_attrs[] = {
+ &dev_attr_number_of_ways_enabled.attr,
+ NULL,
+};
+
+static const struct attribute_group priv_attr_group = {
+ .attrs = priv_attrs,
+};
+
+static const struct attribute_group *ccache_get_priv_group(struct cacheinfo *this_leaf)
+{
+ /* We want to use private group for composable cache only */
+ if (this_leaf->level == level)
+ return &priv_attr_group;
+ else
+ return NULL;
+}
+
+static irqreturn_t ccache_int_handler(int irq, void *device)
+{
+ unsigned int add_h, add_l;
+
+ if (irq == g_irq[DIR_CORR]) {
+ add_h = readl(ccache_base + SIFIVE_CCACHE_DIRECCFIX_HIGH);
+ add_l = readl(ccache_base + SIFIVE_CCACHE_DIRECCFIX_LOW);
+ pr_err("CCACHE: DirError @ 0x%08X.%08X\n", add_h, add_l);
+ /* Reading this register clears the DirError interrupt sig */
+ readl(ccache_base + SIFIVE_CCACHE_DIRECCFIX_COUNT);
+ atomic_notifier_call_chain(&ccache_err_chain, SIFIVE_CCACHE_ERR_TYPE_CE,
+ "DirECCFix");
+ }
+ if (irq == g_irq[DATA_CORR]) {
+ add_h = readl(ccache_base + SIFIVE_CCACHE_DATECCFIX_HIGH);
+ add_l = readl(ccache_base + SIFIVE_CCACHE_DATECCFIX_LOW);
+ pr_err("CCACHE: DataError @ 0x%08X.%08X\n", add_h, add_l);
+ /* Reading this register clears the DataError interrupt sig */
+ readl(ccache_base + SIFIVE_CCACHE_DATECCFIX_COUNT);
+ atomic_notifier_call_chain(&ccache_err_chain, SIFIVE_CCACHE_ERR_TYPE_CE,
+ "DatECCFix");
+ }
+ if (irq == g_irq[DATA_UNCORR]) {
+ add_h = readl(ccache_base + SIFIVE_CCACHE_DATECCFAIL_HIGH);
+ add_l = readl(ccache_base + SIFIVE_CCACHE_DATECCFAIL_LOW);
+ pr_err("CCACHE: DataFail @ 0x%08X.%08X\n", add_h, add_l);
+ /* Reading this register clears the DataFail interrupt sig */
+ readl(ccache_base + SIFIVE_CCACHE_DATECCFAIL_COUNT);
+ atomic_notifier_call_chain(&ccache_err_chain, SIFIVE_CCACHE_ERR_TYPE_UE,
+ "DatECCFail");
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int __init sifive_ccache_init(void)
+{
+ struct device_node *np;
+ struct resource res;
+ int i, rc;
+
+ np = of_find_matching_node(NULL, sifive_ccache_ids);
+ if (!np)
+ return -ENODEV;
+
+ if (of_address_to_resource(np, 0, &res))
+ return -ENODEV;
+
+ if (of_property_read_u32(np, "cache-level", &level))
+ return -ENODEV;
+
+ ccache_base = ioremap(res.start, resource_size(&res));
+ if (!ccache_base)
+ return -ENOMEM;
+
+ for (i = 0; i < SIFIVE_CCACHE_MAX_ECCINTR; i++) {
+ g_irq[i] = irq_of_parse_and_map(np, i);
+ rc = request_irq(g_irq[i], ccache_int_handler, 0, "ccache_ecc", NULL);
+ if (rc) {
+ pr_err("CCACHE: Could not request IRQ %d\n", g_irq[i]);
+ return rc;
+ }
+ }
+
+ ccache_config_read();
+
+ ccache_cache_ops.get_priv_group = ccache_get_priv_group;
+ riscv_set_cacheinfo_ops(&ccache_cache_ops);
+
+#ifdef CONFIG_DEBUG_FS
+ setup_sifive_debug();
+#endif
+ return 0;
+}
+device_initcall(sifive_ccache_init);
diff --git a/drivers/soc/sifive/sifive_l2_cache.c b/drivers/soc/sifive/sifive_l2_cache.c
deleted file mode 100644
index 59640a1d0b28..000000000000
--- a/drivers/soc/sifive/sifive_l2_cache.c
+++ /dev/null
@@ -1,237 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * SiFive L2 cache controller Driver
- *
- * Copyright (C) 2018-2019 SiFive, Inc.
- *
- */
-#include <linux/debugfs.h>
-#include <linux/interrupt.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/device.h>
-#include <asm/cacheinfo.h>
-#include <soc/sifive/sifive_l2_cache.h>
-
-#define SIFIVE_L2_DIRECCFIX_LOW 0x100
-#define SIFIVE_L2_DIRECCFIX_HIGH 0x104
-#define SIFIVE_L2_DIRECCFIX_COUNT 0x108
-
-#define SIFIVE_L2_DIRECCFAIL_LOW 0x120
-#define SIFIVE_L2_DIRECCFAIL_HIGH 0x124
-#define SIFIVE_L2_DIRECCFAIL_COUNT 0x128
-
-#define SIFIVE_L2_DATECCFIX_LOW 0x140
-#define SIFIVE_L2_DATECCFIX_HIGH 0x144
-#define SIFIVE_L2_DATECCFIX_COUNT 0x148
-
-#define SIFIVE_L2_DATECCFAIL_LOW 0x160
-#define SIFIVE_L2_DATECCFAIL_HIGH 0x164
-#define SIFIVE_L2_DATECCFAIL_COUNT 0x168
-
-#define SIFIVE_L2_CONFIG 0x00
-#define SIFIVE_L2_WAYENABLE 0x08
-#define SIFIVE_L2_ECCINJECTERR 0x40
-
-#define SIFIVE_L2_MAX_ECCINTR 4
-
-static void __iomem *l2_base;
-static int g_irq[SIFIVE_L2_MAX_ECCINTR];
-static struct riscv_cacheinfo_ops l2_cache_ops;
-
-enum {
- DIR_CORR = 0,
- DATA_CORR,
- DATA_UNCORR,
- DIR_UNCORR,
-};
-
-#ifdef CONFIG_DEBUG_FS
-static struct dentry *sifive_test;
-
-static ssize_t l2_write(struct file *file, const char __user *data,
- size_t count, loff_t *ppos)
-{
- unsigned int val;
-
- if (kstrtouint_from_user(data, count, 0, &val))
- return -EINVAL;
- if ((val < 0xFF) || (val >= 0x10000 && val < 0x100FF))
- writel(val, l2_base + SIFIVE_L2_ECCINJECTERR);
- else
- return -EINVAL;
- return count;
-}
-
-static const struct file_operations l2_fops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .write = l2_write
-};
-
-static void setup_sifive_debug(void)
-{
- sifive_test = debugfs_create_dir("sifive_l2_cache", NULL);
-
- debugfs_create_file("sifive_debug_inject_error", 0200,
- sifive_test, NULL, &l2_fops);
-}
-#endif
-
-static void l2_config_read(void)
-{
- u32 regval, val;
-
- regval = readl(l2_base + SIFIVE_L2_CONFIG);
- val = regval & 0xFF;
- pr_info("L2CACHE: No. of Banks in the cache: %d\n", val);
- val = (regval & 0xFF00) >> 8;
- pr_info("L2CACHE: No. of ways per bank: %d\n", val);
- val = (regval & 0xFF0000) >> 16;
- pr_info("L2CACHE: Sets per bank: %llu\n", (uint64_t)1 << val);
- val = (regval & 0xFF000000) >> 24;
- pr_info("L2CACHE: Bytes per cache block: %llu\n", (uint64_t)1 << val);
-
- regval = readl(l2_base + SIFIVE_L2_WAYENABLE);
- pr_info("L2CACHE: Index of the largest way enabled: %d\n", regval);
-}
-
-static const struct of_device_id sifive_l2_ids[] = {
- { .compatible = "sifive,fu540-c000-ccache" },
- { .compatible = "sifive,fu740-c000-ccache" },
- { /* end of table */ },
-};
-
-static ATOMIC_NOTIFIER_HEAD(l2_err_chain);
-
-int register_sifive_l2_error_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_register(&l2_err_chain, nb);
-}
-EXPORT_SYMBOL_GPL(register_sifive_l2_error_notifier);
-
-int unregister_sifive_l2_error_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_unregister(&l2_err_chain, nb);
-}
-EXPORT_SYMBOL_GPL(unregister_sifive_l2_error_notifier);
-
-static int l2_largest_wayenabled(void)
-{
- return readl(l2_base + SIFIVE_L2_WAYENABLE) & 0xFF;
-}
-
-static ssize_t number_of_ways_enabled_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%u\n", l2_largest_wayenabled());
-}
-
-static DEVICE_ATTR_RO(number_of_ways_enabled);
-
-static struct attribute *priv_attrs[] = {
- &dev_attr_number_of_ways_enabled.attr,
- NULL,
-};
-
-static const struct attribute_group priv_attr_group = {
- .attrs = priv_attrs,
-};
-
-static const struct attribute_group *l2_get_priv_group(struct cacheinfo *this_leaf)
-{
- /* We want to use private group for L2 cache only */
- if (this_leaf->level == 2)
- return &priv_attr_group;
- else
- return NULL;
-}
-
-static irqreturn_t l2_int_handler(int irq, void *device)
-{
- unsigned int add_h, add_l;
-
- if (irq == g_irq[DIR_CORR]) {
- add_h = readl(l2_base + SIFIVE_L2_DIRECCFIX_HIGH);
- add_l = readl(l2_base + SIFIVE_L2_DIRECCFIX_LOW);
- pr_err("L2CACHE: DirError @ 0x%08X.%08X\n", add_h, add_l);
- /* Reading this register clears the DirError interrupt sig */
- readl(l2_base + SIFIVE_L2_DIRECCFIX_COUNT);
- atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
- "DirECCFix");
- }
- if (irq == g_irq[DIR_UNCORR]) {
- add_h = readl(l2_base + SIFIVE_L2_DIRECCFAIL_HIGH);
- add_l = readl(l2_base + SIFIVE_L2_DIRECCFAIL_LOW);
- /* Reading this register clears the DirFail interrupt sig */
- readl(l2_base + SIFIVE_L2_DIRECCFAIL_COUNT);
- atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_UE,
- "DirECCFail");
- panic("L2CACHE: DirFail @ 0x%08X.%08X\n", add_h, add_l);
- }
- if (irq == g_irq[DATA_CORR]) {
- add_h = readl(l2_base + SIFIVE_L2_DATECCFIX_HIGH);
- add_l = readl(l2_base + SIFIVE_L2_DATECCFIX_LOW);
- pr_err("L2CACHE: DataError @ 0x%08X.%08X\n", add_h, add_l);
- /* Reading this register clears the DataError interrupt sig */
- readl(l2_base + SIFIVE_L2_DATECCFIX_COUNT);
- atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
- "DatECCFix");
- }
- if (irq == g_irq[DATA_UNCORR]) {
- add_h = readl(l2_base + SIFIVE_L2_DATECCFAIL_HIGH);
- add_l = readl(l2_base + SIFIVE_L2_DATECCFAIL_LOW);
- pr_err("L2CACHE: DataFail @ 0x%08X.%08X\n", add_h, add_l);
- /* Reading this register clears the DataFail interrupt sig */
- readl(l2_base + SIFIVE_L2_DATECCFAIL_COUNT);
- atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_UE,
- "DatECCFail");
- }
-
- return IRQ_HANDLED;
-}
-
-static int __init sifive_l2_init(void)
-{
- struct device_node *np;
- struct resource res;
- int i, rc, intr_num;
-
- np = of_find_matching_node(NULL, sifive_l2_ids);
- if (!np)
- return -ENODEV;
-
- if (of_address_to_resource(np, 0, &res))
- return -ENODEV;
-
- l2_base = ioremap(res.start, resource_size(&res));
- if (!l2_base)
- return -ENOMEM;
-
- intr_num = of_property_count_u32_elems(np, "interrupts");
- if (!intr_num) {
- pr_err("L2CACHE: no interrupts property\n");
- return -ENODEV;
- }
-
- for (i = 0; i < intr_num; i++) {
- g_irq[i] = irq_of_parse_and_map(np, i);
- rc = request_irq(g_irq[i], l2_int_handler, 0, "l2_ecc", NULL);
- if (rc) {
- pr_err("L2CACHE: Could not request IRQ %d\n", g_irq[i]);
- return rc;
- }
- }
-
- l2_config_read();
-
- l2_cache_ops.get_priv_group = l2_get_priv_group;
- riscv_set_cacheinfo_ops(&l2_cache_ops);
-
-#ifdef CONFIG_DEBUG_FS
- setup_sifive_debug();
-#endif
- return 0;
-}
-device_initcall(sifive_l2_init);
diff --git a/include/soc/sifive/sifive_ccache.h b/include/soc/sifive/sifive_ccache.h
new file mode 100644
index 000000000000..16576d678ea8
--- /dev/null
+++ b/include/soc/sifive/sifive_ccache.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * SiFive composable Cache Controller header file
+ *
+ */
+
+#ifndef __SOC_SIFIVE_CCACHE_H
+#define __SOC_SIFIVE_CCACHE_H
+
+extern int register_sifive_ccache_error_notifier(struct notifier_block *nb);
+extern int unregister_sifive_ccache_error_notifier(struct notifier_block *nb);
+
+#define SIFIVE_CCACHE_ERR_TYPE_CE 0
+#define SIFIVE_CCACHE_ERR_TYPE_UE 1
+
+#endif /* __SOC_SIFIVE_CCACHE_H */
diff --git a/include/soc/sifive/sifive_l2_cache.h b/include/soc/sifive/sifive_l2_cache.h
deleted file mode 100644
index 92ade10ed67e..000000000000
--- a/include/soc/sifive/sifive_l2_cache.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * SiFive L2 Cache Controller header file
- *
- */
-
-#ifndef __SOC_SIFIVE_L2_CACHE_H
-#define __SOC_SIFIVE_L2_CACHE_H
-
-extern int register_sifive_l2_error_notifier(struct notifier_block *nb);
-extern int unregister_sifive_l2_error_notifier(struct notifier_block *nb);
-
-#define SIFIVE_L2_ERR_TYPE_CE 0
-#define SIFIVE_L2_ERR_TYPE_UE 1
-
-#endif /* __SOC_SIFIVE_L2_CACHE_H */
--
2.17.1
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