N: sifive
K: [^@]sifive
+SIFIVE CACHE DRIVER
+M: Conor Dooley <conor@kernel.org>
+L: linux-riscv@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
+F: drivers/cache/sifive_ccache.c
+
SIFIVE FU540 SYSTEM-ON-CHIP
M: Paul Walmsley <paul.walmsley@sifive.com>
M: Palmer Dabbelt <palmer@dabbelt.com>
F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
F: drivers/dma/sf-pdma/
-SIFIVE SOC DRIVERS
-M: Conor Dooley <conor@kernel.org>
-L: linux-riscv@lists.infradead.org
-S: Maintained
-T: git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
-F: Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
-F: drivers/soc/sifive/
SILEAD TOUCHSCREEN DRIVER
M: Hans de Goede <hdegoede@redhat.com>
help
Support for the L2 cache controller on Andes Technology AX45MP platforms.
+config SIFIVE_CCACHE
+ bool "Sifive Composable Cache controller"
+ depends on ARCH_SIFIVE || ARCH_STARFIVE
+ help
+ Support for the composable cache controller on SiFive platforms.
+
endmenu
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_AX45MP_L2_CACHE) += ax45mp_cache.o
+obj-$(CONFIG_AX45MP_L2_CACHE) += ax45mp_cache.o
+obj-$(CONFIG_SIFIVE_CCACHE) += sifive_ccache.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SiFive composable cache controller Driver
+ *
+ * Copyright (C) 2018-2022 SiFive, Inc.
+ *
+ */
+
+#define pr_fmt(fmt) "CCACHE: " fmt
+
+#include <linux/debugfs.h>
+#include <linux/interrupt.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/device.h>
+#include <linux/bitfield.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_DIRECCFAIL_LOW 0x120
+#define SIFIVE_CCACHE_DIRECCFAIL_HIGH 0x124
+#define SIFIVE_CCACHE_DIRECCFAIL_COUNT 0x128
+
+#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_CONFIG_BANK_MASK GENMASK_ULL(7, 0)
+#define SIFIVE_CCACHE_CONFIG_WAYS_MASK GENMASK_ULL(15, 8)
+#define SIFIVE_CCACHE_CONFIG_SETS_MASK GENMASK_ULL(23, 16)
+#define SIFIVE_CCACHE_CONFIG_BLKS_MASK GENMASK_ULL(31, 24)
+
+#define SIFIVE_CCACHE_WAYENABLE 0x08
+#define SIFIVE_CCACHE_ECCINJECTERR 0x40
+
+#define SIFIVE_CCACHE_MAX_ECCINTR 4
+
+static void __iomem *ccache_base;
+static int g_irq[SIFIVE_CCACHE_MAX_ECCINTR];
+static struct riscv_cacheinfo_ops ccache_cache_ops;
+static int level;
+
+enum {
+ DIR_CORR = 0,
+ DATA_CORR,
+ DATA_UNCORR,
+ DIR_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 cfg;
+
+ cfg = readl(ccache_base + SIFIVE_CCACHE_CONFIG);
+ pr_info("%llu banks, %llu ways, sets/bank=%llu, bytes/block=%llu\n",
+ FIELD_GET(SIFIVE_CCACHE_CONFIG_BANK_MASK, cfg),
+ FIELD_GET(SIFIVE_CCACHE_CONFIG_WAYS_MASK, cfg),
+ BIT_ULL(FIELD_GET(SIFIVE_CCACHE_CONFIG_SETS_MASK, cfg)),
+ BIT_ULL(FIELD_GET(SIFIVE_CCACHE_CONFIG_BLKS_MASK, cfg)));
+
+ cfg = readl(ccache_base + SIFIVE_CCACHE_WAYENABLE);
+ pr_info("Index of the largest way enabled: %u\n", cfg);
+}
+
+static const struct of_device_id sifive_ccache_ids[] = {
+ { .compatible = "sifive,fu540-c000-ccache" },
+ { .compatible = "sifive,fu740-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("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[DIR_UNCORR]) {
+ add_h = readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_HIGH);
+ add_l = readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_LOW);
+ /* Reading this register clears the DirFail interrupt sig */
+ readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_COUNT);
+ atomic_notifier_call_chain(&ccache_err_chain,
+ SIFIVE_CCACHE_ERR_TYPE_UE,
+ "DirECCFail");
+ panic("CCACHE: DirFail @ 0x%08X.%08X\n", add_h, add_l);
+ }
+ 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("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("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, intr_num;
+
+ np = of_find_matching_node(NULL, sifive_ccache_ids);
+ if (!np)
+ return -ENODEV;
+
+ if (of_address_to_resource(np, 0, &res)) {
+ rc = -ENODEV;
+ goto err_node_put;
+ }
+
+ ccache_base = ioremap(res.start, resource_size(&res));
+ if (!ccache_base) {
+ rc = -ENOMEM;
+ goto err_node_put;
+ }
+
+ if (of_property_read_u32(np, "cache-level", &level)) {
+ rc = -ENOENT;
+ goto err_unmap;
+ }
+
+ intr_num = of_property_count_u32_elems(np, "interrupts");
+ if (!intr_num) {
+ pr_err("No interrupts property\n");
+ rc = -ENODEV;
+ goto err_unmap;
+ }
+
+ for (i = 0; i < intr_num; 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("Could not request IRQ %d\n", g_irq[i]);
+ goto err_free_irq;
+ }
+ }
+ of_node_put(np);
+
+ 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;
+
+err_free_irq:
+ while (--i >= 0)
+ free_irq(g_irq[i], NULL);
+err_unmap:
+ iounmap(ccache_base);
+err_node_put:
+ of_node_put(np);
+ return rc;
+}
+
+device_initcall(sifive_ccache_init);
source "drivers/soc/renesas/Kconfig"
source "drivers/soc/rockchip/Kconfig"
source "drivers/soc/samsung/Kconfig"
-source "drivers/soc/sifive/Kconfig"
source "drivers/soc/sunxi/Kconfig"
source "drivers/soc/tegra/Kconfig"
source "drivers/soc/ti/Kconfig"
obj-y += renesas/
obj-y += rockchip/
obj-$(CONFIG_SOC_SAMSUNG) += samsung/
-obj-y += sifive/
obj-y += sunxi/
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-y += ti/
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-
-if ARCH_SIFIVE || ARCH_STARFIVE
-
-config SIFIVE_CCACHE
- bool "Sifive Composable Cache controller"
- help
- Support for the composable cache controller on SiFive platforms.
-
-endif
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_SIFIVE_CCACHE) += sifive_ccache.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * SiFive composable cache controller Driver
- *
- * Copyright (C) 2018-2022 SiFive, Inc.
- *
- */
-
-#define pr_fmt(fmt) "CCACHE: " fmt
-
-#include <linux/debugfs.h>
-#include <linux/interrupt.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/device.h>
-#include <linux/bitfield.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_DIRECCFAIL_LOW 0x120
-#define SIFIVE_CCACHE_DIRECCFAIL_HIGH 0x124
-#define SIFIVE_CCACHE_DIRECCFAIL_COUNT 0x128
-
-#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_CONFIG_BANK_MASK GENMASK_ULL(7, 0)
-#define SIFIVE_CCACHE_CONFIG_WAYS_MASK GENMASK_ULL(15, 8)
-#define SIFIVE_CCACHE_CONFIG_SETS_MASK GENMASK_ULL(23, 16)
-#define SIFIVE_CCACHE_CONFIG_BLKS_MASK GENMASK_ULL(31, 24)
-
-#define SIFIVE_CCACHE_WAYENABLE 0x08
-#define SIFIVE_CCACHE_ECCINJECTERR 0x40
-
-#define SIFIVE_CCACHE_MAX_ECCINTR 4
-
-static void __iomem *ccache_base;
-static int g_irq[SIFIVE_CCACHE_MAX_ECCINTR];
-static struct riscv_cacheinfo_ops ccache_cache_ops;
-static int level;
-
-enum {
- DIR_CORR = 0,
- DATA_CORR,
- DATA_UNCORR,
- DIR_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 cfg;
-
- cfg = readl(ccache_base + SIFIVE_CCACHE_CONFIG);
- pr_info("%llu banks, %llu ways, sets/bank=%llu, bytes/block=%llu\n",
- FIELD_GET(SIFIVE_CCACHE_CONFIG_BANK_MASK, cfg),
- FIELD_GET(SIFIVE_CCACHE_CONFIG_WAYS_MASK, cfg),
- BIT_ULL(FIELD_GET(SIFIVE_CCACHE_CONFIG_SETS_MASK, cfg)),
- BIT_ULL(FIELD_GET(SIFIVE_CCACHE_CONFIG_BLKS_MASK, cfg)));
-
- cfg = readl(ccache_base + SIFIVE_CCACHE_WAYENABLE);
- pr_info("Index of the largest way enabled: %u\n", cfg);
-}
-
-static const struct of_device_id sifive_ccache_ids[] = {
- { .compatible = "sifive,fu540-c000-ccache" },
- { .compatible = "sifive,fu740-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("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[DIR_UNCORR]) {
- add_h = readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_HIGH);
- add_l = readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_LOW);
- /* Reading this register clears the DirFail interrupt sig */
- readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_COUNT);
- atomic_notifier_call_chain(&ccache_err_chain,
- SIFIVE_CCACHE_ERR_TYPE_UE,
- "DirECCFail");
- panic("CCACHE: DirFail @ 0x%08X.%08X\n", add_h, add_l);
- }
- 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("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("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, intr_num;
-
- np = of_find_matching_node(NULL, sifive_ccache_ids);
- if (!np)
- return -ENODEV;
-
- if (of_address_to_resource(np, 0, &res)) {
- rc = -ENODEV;
- goto err_node_put;
- }
-
- ccache_base = ioremap(res.start, resource_size(&res));
- if (!ccache_base) {
- rc = -ENOMEM;
- goto err_node_put;
- }
-
- if (of_property_read_u32(np, "cache-level", &level)) {
- rc = -ENOENT;
- goto err_unmap;
- }
-
- intr_num = of_property_count_u32_elems(np, "interrupts");
- if (!intr_num) {
- pr_err("No interrupts property\n");
- rc = -ENODEV;
- goto err_unmap;
- }
-
- for (i = 0; i < intr_num; 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("Could not request IRQ %d\n", g_irq[i]);
- goto err_free_irq;
- }
- }
- of_node_put(np);
-
- 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;
-
-err_free_irq:
- while (--i >= 0)
- free_irq(g_irq[i], NULL);
-err_unmap:
- iounmap(ccache_base);
-err_node_put:
- of_node_put(np);
- return rc;
-}
-
-device_initcall(sifive_ccache_init);
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