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Message-ID: <ca7d8e75-1823-05d9-6196-1d0ae14e2ec9@microchip.com>
Date: Thu, 8 Sep 2022 18:33:52 +0000
From: <Conor.Dooley@...rochip.com>
To: <zong.li@...ive.com>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <palmer@...belt.com>,
<paul.walmsley@...ive.com>, <aou@...s.berkeley.edu>,
<greentime.hu@...ive.com>, <ben.dooks@...ive.com>, <bp@...en8.de>,
<devicetree@...r.kernel.org>, <linux-riscv@...ts.infradead.org>,
<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] soc: sifive: ccache: rename SiFive L2 cache to
Composable cache.
On 08/09/2022 15:44, Zong Li wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Since composable cache may be L3 cache if there is a L2 cache, we should
> use its original name composable cache to prevent confusion.
>
> Apart from renaming, we also add the compatible "sifive,ccache0" into ID
> table.
>
> The sifive L2 has been renamed to sifive CCACHE, EDAC driver needs to
> apply the change as well.
>
> Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
> Signed-off-by: Zong Li <zong.li@...ive.com>
SoB chain here is odd still, if Greentime co-authored they need to have
a Co-developed-by tag.
Otherwise:
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
> drivers/edac/Kconfig | 2 +-
> drivers/edac/sifive_edac.c | 12 +-
> drivers/soc/sifive/Kconfig | 6 +-
> drivers/soc/sifive/Makefile | 2 +-
> .../{sifive_l2_cache.c => sifive_ccache.c} | 174 +++++++++---------
> .../{sifive_l2_cache.h => sifive_ccache.h} | 16 +-
> 6 files changed, 110 insertions(+), 102 deletions(-)
> rename drivers/soc/sifive/{sifive_l2_cache.c => sifive_ccache.c} (34%)
> rename include/soc/sifive/{sifive_l2_cache.h => sifive_ccache.h} (12%)
>
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index 17562cf1fe97..456602d373b7 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -473,7 +473,7 @@ config EDAC_ALTERA_SDMMC
>
> config EDAC_SIFIVE
> bool "Sifive platform EDAC driver"
> - depends on EDAC=y && SIFIVE_L2
> + depends on EDAC=y && SIFIVE_CCACHE
> help
> Support for error detection and correction on the SiFive SoCs.
>
> diff --git a/drivers/edac/sifive_edac.c b/drivers/edac/sifive_edac.c
> index ee800aec7d47..b844e2626fd5 100644
> --- a/drivers/edac/sifive_edac.c
> +++ b/drivers/edac/sifive_edac.c
> @@ -2,7 +2,7 @@
> /*
> * SiFive Platform EDAC Driver
> *
> - * Copyright (C) 2018-2019 SiFive, Inc.
> + * Copyright (C) 2018-2022 SiFive, Inc.
> *
> * This driver is partially based on octeon_edac-pc.c
> *
> @@ -10,7 +10,7 @@
> #include <linux/edac.h>
> #include <linux/platform_device.h>
> #include "edac_module.h"
> -#include <soc/sifive/sifive_l2_cache.h>
> +#include <soc/sifive/sifive_ccache.h>
>
> #define DRVNAME "sifive_edac"
>
> @@ -32,9 +32,9 @@ int ecc_err_event(struct notifier_block *this, unsigned long event, void *ptr)
>
> p = container_of(this, struct sifive_edac_priv, notifier);
>
> - if (event == SIFIVE_L2_ERR_TYPE_UE)
> + if (event == SIFIVE_CCACHE_ERR_TYPE_UE)
> edac_device_handle_ue(p->dci, 0, 0, msg);
> - else if (event == SIFIVE_L2_ERR_TYPE_CE)
> + else if (event == SIFIVE_CCACHE_ERR_TYPE_CE)
> edac_device_handle_ce(p->dci, 0, 0, msg);
>
> return NOTIFY_OK;
> @@ -67,7 +67,7 @@ static int ecc_register(struct platform_device *pdev)
> goto err;
> }
>
> - register_sifive_l2_error_notifier(&p->notifier);
> + register_sifive_ccache_error_notifier(&p->notifier);
>
> return 0;
>
> @@ -81,7 +81,7 @@ static int ecc_unregister(struct platform_device *pdev)
> {
> struct sifive_edac_priv *p = platform_get_drvdata(pdev);
>
> - unregister_sifive_l2_error_notifier(&p->notifier);
> + unregister_sifive_ccache_error_notifier(&p->notifier);
> edac_device_del_device(&pdev->dev);
> edac_device_free_ctl_info(p->dci);
>
> diff --git a/drivers/soc/sifive/Kconfig b/drivers/soc/sifive/Kconfig
> index 58cf8c40d08d..ed4c571f8771 100644
> --- a/drivers/soc/sifive/Kconfig
> +++ b/drivers/soc/sifive/Kconfig
> @@ -2,9 +2,9 @@
>
> if SOC_SIFIVE
>
> -config SIFIVE_L2
> - bool "Sifive L2 Cache controller"
> +config SIFIVE_CCACHE
> + bool "Sifive Composable Cache controller"
> 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_l2_cache.c b/drivers/soc/sifive/sifive_ccache.c
> similarity index 34%
> rename from drivers/soc/sifive/sifive_l2_cache.c
> rename to drivers/soc/sifive/sifive_ccache.c
> index 59640a1d0b28..949b824e89ad 100644
> --- a/drivers/soc/sifive/sifive_l2_cache.c
> +++ b/drivers/soc/sifive/sifive_ccache.c
> @@ -1,8 +1,8 @@
> // SPDX-License-Identifier: GPL-2.0
> /*
> - * SiFive L2 cache controller Driver
> + * SiFive composable cache controller Driver
> *
> - * Copyright (C) 2018-2019 SiFive, Inc.
> + * Copyright (C) 2018-2022 SiFive, Inc.
> *
> */
> #include <linux/debugfs.h>
> @@ -11,33 +11,33 @@
> #include <linux/of_address.h>
> #include <linux/device.h>
> #include <asm/cacheinfo.h>
> -#include <soc/sifive/sifive_l2_cache.h>
> +#include <soc/sifive/sifive_ccache.h>
>
> -#define SIFIVE_L2_DIRECCFIX_LOW 0x100
> -#define SIFIVE_L2_DIRECCFIX_HIGH 0x104
> -#define SIFIVE_L2_DIRECCFIX_COUNT 0x108
> +#define SIFIVE_CCACHE_DIRECCFIX_LOW 0x100
> +#define SIFIVE_CCACHE_DIRECCFIX_HIGH 0x104
> +#define SIFIVE_CCACHE_DIRECCFIX_COUNT 0x108
>
> -#define SIFIVE_L2_DIRECCFAIL_LOW 0x120
> -#define SIFIVE_L2_DIRECCFAIL_HIGH 0x124
> -#define SIFIVE_L2_DIRECCFAIL_COUNT 0x128
> +#define SIFIVE_CCACHE_DIRECCFAIL_LOW 0x120
> +#define SIFIVE_CCACHE_DIRECCFAIL_HIGH 0x124
> +#define SIFIVE_CCACHE_DIRECCFAIL_COUNT 0x128
>
> -#define SIFIVE_L2_DATECCFIX_LOW 0x140
> -#define SIFIVE_L2_DATECCFIX_HIGH 0x144
> -#define SIFIVE_L2_DATECCFIX_COUNT 0x148
> +#define SIFIVE_CCACHE_DATECCFIX_LOW 0x140
> +#define SIFIVE_CCACHE_DATECCFIX_HIGH 0x144
> +#define SIFIVE_CCACHE_DATECCFIX_COUNT 0x148
>
> -#define SIFIVE_L2_DATECCFAIL_LOW 0x160
> -#define SIFIVE_L2_DATECCFAIL_HIGH 0x164
> -#define SIFIVE_L2_DATECCFAIL_COUNT 0x168
> +#define SIFIVE_CCACHE_DATECCFAIL_LOW 0x160
> +#define SIFIVE_CCACHE_DATECCFAIL_HIGH 0x164
> +#define SIFIVE_CCACHE_DATECCFAIL_COUNT 0x168
>
> -#define SIFIVE_L2_CONFIG 0x00
> -#define SIFIVE_L2_WAYENABLE 0x08
> -#define SIFIVE_L2_ECCINJECTERR 0x40
> +#define SIFIVE_CCACHE_CONFIG 0x00
> +#define SIFIVE_CCACHE_WAYENABLE 0x08
> +#define SIFIVE_CCACHE_ECCINJECTERR 0x40
>
> -#define SIFIVE_L2_MAX_ECCINTR 4
> +#define SIFIVE_CCACHE_MAX_ECCINTR 4
>
> -static void __iomem *l2_base;
> -static int g_irq[SIFIVE_L2_MAX_ECCINTR];
> -static struct riscv_cacheinfo_ops l2_cache_ops;
> +static void __iomem *ccache_base;
> +static int g_irq[SIFIVE_CCACHE_MAX_ECCINTR];
> +static struct riscv_cacheinfo_ops ccache_cache_ops;
>
> enum {
> DIR_CORR = 0,
> @@ -49,83 +49,84 @@ enum {
> #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)
> +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, l2_base + SIFIVE_L2_ECCINJECTERR);
> + writel(val, ccache_base + SIFIVE_CCACHE_ECCINJECTERR);
> else
> return -EINVAL;
> return count;
> }
>
> -static const struct file_operations l2_fops = {
> +static const struct file_operations ccache_fops = {
> .owner = THIS_MODULE,
> .open = simple_open,
> - .write = l2_write
> + .write = ccache_write
> };
>
> static void setup_sifive_debug(void)
> {
> - sifive_test = debugfs_create_dir("sifive_l2_cache", NULL);
> + sifive_test = debugfs_create_dir("sifive_ccache_cache", NULL);
>
> debugfs_create_file("sifive_debug_inject_error", 0200,
> - sifive_test, NULL, &l2_fops);
> + sifive_test, NULL, &ccache_fops);
> }
> #endif
>
> -static void l2_config_read(void)
> +static void ccache_config_read(void)
> {
> u32 regval, val;
>
> - regval = readl(l2_base + SIFIVE_L2_CONFIG);
> + regval = readl(ccache_base + SIFIVE_CCACHE_CONFIG);
> val = regval & 0xFF;
> - pr_info("L2CACHE: No. of Banks in the cache: %d\n", val);
> + pr_info("CCACHE: No. of Banks in the cache: %d\n", val);
> val = (regval & 0xFF00) >> 8;
> - pr_info("L2CACHE: No. of ways per bank: %d\n", val);
> + pr_info("CCACHE: No. of ways per bank: %d\n", val);
> val = (regval & 0xFF0000) >> 16;
> - pr_info("L2CACHE: Sets per bank: %llu\n", (uint64_t)1 << val);
> + pr_info("CCACHE: 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);
> + pr_info("CCACHE: 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);
> + 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_l2_ids[] = {
> +static const struct of_device_id sifive_ccache_ids[] = {
> { .compatible = "sifive,fu540-c000-ccache" },
> { .compatible = "sifive,fu740-c000-ccache" },
> - { /* end of table */ },
> + { .compatible = "sifive,ccache0" },
> + { /* end of table */ }
> };
>
> -static ATOMIC_NOTIFIER_HEAD(l2_err_chain);
> +static ATOMIC_NOTIFIER_HEAD(ccache_err_chain);
>
> -int register_sifive_l2_error_notifier(struct notifier_block *nb)
> +int register_sifive_ccache_error_notifier(struct notifier_block *nb)
> {
> - return atomic_notifier_chain_register(&l2_err_chain, nb);
> + return atomic_notifier_chain_register(&ccache_err_chain, nb);
> }
> -EXPORT_SYMBOL_GPL(register_sifive_l2_error_notifier);
> +EXPORT_SYMBOL_GPL(register_sifive_ccache_error_notifier);
>
> -int unregister_sifive_l2_error_notifier(struct notifier_block *nb)
> +int unregister_sifive_ccache_error_notifier(struct notifier_block *nb)
> {
> - return atomic_notifier_chain_unregister(&l2_err_chain, nb);
> + return atomic_notifier_chain_unregister(&ccache_err_chain, nb);
> }
> -EXPORT_SYMBOL_GPL(unregister_sifive_l2_error_notifier);
> +EXPORT_SYMBOL_GPL(unregister_sifive_ccache_error_notifier);
>
> -static int l2_largest_wayenabled(void)
> +static int ccache_largest_wayenabled(void)
> {
> - return readl(l2_base + SIFIVE_L2_WAYENABLE) & 0xFF;
> + 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", l2_largest_wayenabled());
> + return sprintf(buf, "%u\n", ccache_largest_wayenabled());
> }
>
> static DEVICE_ATTR_RO(number_of_ways_enabled);
> @@ -139,99 +140,106 @@ static const struct attribute_group priv_attr_group = {
> .attrs = priv_attrs,
> };
>
> -static const struct attribute_group *l2_get_priv_group(struct cacheinfo *this_leaf)
> +static const struct attribute_group *ccache_get_priv_group(struct cacheinfo
> + *this_leaf)
> {
> - /* We want to use private group for L2 cache only */
> + /* We want to use private group for composable cache only */
> if (this_leaf->level == 2)
> return &priv_attr_group;
> else
> return NULL;
> }
>
> -static irqreturn_t l2_int_handler(int irq, void *device)
> +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(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);
> + 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(l2_base + SIFIVE_L2_DIRECCFIX_COUNT);
> - atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
> + 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(l2_base + SIFIVE_L2_DIRECCFAIL_HIGH);
> - add_l = readl(l2_base + SIFIVE_L2_DIRECCFAIL_LOW);
> + 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(l2_base + SIFIVE_L2_DIRECCFAIL_COUNT);
> - atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_UE,
> + readl(ccache_base + SIFIVE_CCACHE_DIRECCFAIL_COUNT);
> + atomic_notifier_call_chain(&ccache_err_chain,
> + SIFIVE_CCACHE_ERR_TYPE_UE,
> "DirECCFail");
> - panic("L2CACHE: DirFail @ 0x%08X.%08X\n", add_h, add_l);
> + panic("CCACHE: 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);
> + 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(l2_base + SIFIVE_L2_DATECCFIX_COUNT);
> - atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
> + 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(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);
> + 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(l2_base + SIFIVE_L2_DATECCFAIL_COUNT);
> - atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_UE,
> + 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_l2_init(void)
> +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_l2_ids);
> + np = of_find_matching_node(NULL, sifive_ccache_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)
> + ccache_base = ioremap(res.start, resource_size(&res));
> + if (!ccache_base)
> return -ENOMEM;
>
> intr_num = of_property_count_u32_elems(np, "interrupts");
> if (!intr_num) {
> - pr_err("L2CACHE: no interrupts property\n");
> + pr_err("CCACHE: 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);
> + rc = request_irq(g_irq[i], ccache_int_handler, 0, "ccache_ecc",
> + NULL);
> if (rc) {
> - pr_err("L2CACHE: Could not request IRQ %d\n", g_irq[i]);
> + pr_err("CCACHE: Could not request IRQ %d\n", g_irq[i]);
> return rc;
> }
> }
>
> - l2_config_read();
> + ccache_config_read();
>
> - l2_cache_ops.get_priv_group = l2_get_priv_group;
> - riscv_set_cacheinfo_ops(&l2_cache_ops);
> + 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_l2_init);
> +
> +device_initcall(sifive_ccache_init);
> diff --git a/include/soc/sifive/sifive_l2_cache.h b/include/soc/sifive/sifive_ccache.h
> similarity index 12%
> rename from include/soc/sifive/sifive_l2_cache.h
> rename to include/soc/sifive/sifive_ccache.h
> index 92ade10ed67e..4d4ed49388a0 100644
> --- a/include/soc/sifive/sifive_l2_cache.h
> +++ b/include/soc/sifive/sifive_ccache.h
> @@ -1,16 +1,16 @@
> /* SPDX-License-Identifier: GPL-2.0 */
> /*
> - * SiFive L2 Cache Controller header file
> + * SiFive Composable Cache Controller header file
> *
> */
>
> -#ifndef __SOC_SIFIVE_L2_CACHE_H
> -#define __SOC_SIFIVE_L2_CACHE_H
> +#ifndef __SOC_SIFIVE_CCACHE_H
> +#define __SOC_SIFIVE_CCACHE_H
>
> -extern int register_sifive_l2_error_notifier(struct notifier_block *nb);
> -extern int unregister_sifive_l2_error_notifier(struct notifier_block *nb);
> +extern int register_sifive_ccache_error_notifier(struct notifier_block *nb);
> +extern int unregister_sifive_ccache_error_notifier(struct notifier_block *nb);
>
> -#define SIFIVE_L2_ERR_TYPE_CE 0
> -#define SIFIVE_L2_ERR_TYPE_UE 1
> +#define SIFIVE_CCACHE_ERR_TYPE_CE 0
> +#define SIFIVE_CCACHE_ERR_TYPE_UE 1
>
> -#endif /* __SOC_SIFIVE_L2_CACHE_H */
> +#endif /* __SOC_SIFIVE_CCACHE_H */
> --
> 2.17.1
>
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