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Date: Wed, 27 Mar 2019 09:27:49 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Suzuki K Poulose <suzuki.poulose@....com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org, coresight@...ts.linaro.org,
mike.leach@...aro.org, robert.walker@....com
Subject: Re: [PATCH 05/25] coresight: Merge the static and dynamic replicator
drivers
On Wed, Mar 20, 2019 at 06:49:22PM +0000, Suzuki K Poulose wrote:
> Merge the drivers for the two varieties of replicators into
> a singel one. The dynamic replicator has programming base
> which can be programmed to filter the trace data. The driver
> detects the type based on the "base" address value of the
> device, which is NULL for the static device.
>
> Also, while at it, remove the now obsolete DYNAMIC_REPLICATOR
> config entry.
>
> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
I'll pickup patches 1 to 5 immediately as they are useful on their own.
Mathieu
> ---
> drivers/hwtracing/coresight/Kconfig | 8 -
> drivers/hwtracing/coresight/Makefile | 1 -
> .../coresight/coresight-dynamic-replicator.c | 285 ---------------------
> drivers/hwtracing/coresight/coresight-replicator.c | 174 ++++++++++++-
> 4 files changed, 169 insertions(+), 299 deletions(-)
> delete mode 100644 drivers/hwtracing/coresight/coresight-dynamic-replicator.c
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index ad34380..a40d796 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -81,14 +81,6 @@ config CORESIGHT_SOURCE_ETM4X
> for instruction level tracing. Depending on the implemented version
> data tracing may also be available.
>
> -config CORESIGHT_DYNAMIC_REPLICATOR
> - bool "CoreSight Programmable Replicator driver"
> - depends on CORESIGHT_LINKS_AND_SINKS
> - help
> - This enables support for dynamic CoreSight replicator link driver.
> - The programmable ATB replicator allows independent filtering of the
> - trace data based on the traceid.
> -
> config CORESIGHT_STM
> bool "CoreSight System Trace Macrocell driver"
> depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index 41870de..3b435aa 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -15,7 +15,6 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \
> coresight-etm3x-sysfs.o
> obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
> coresight-etm4x-sysfs.o
> -obj-$(CONFIG_CORESIGHT_DYNAMIC_REPLICATOR) += coresight-dynamic-replicator.o
> obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
> obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
> obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
> diff --git a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
> deleted file mode 100644
> index b7d7c41..0000000
> --- a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
> +++ /dev/null
> @@ -1,285 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -/*
> - * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
> - */
> -
> -#include <linux/amba/bus.h>
> -#include <linux/clk.h>
> -#include <linux/coresight.h>
> -#include <linux/device.h>
> -#include <linux/err.h>
> -#include <linux/init.h>
> -#include <linux/io.h>
> -#include <linux/kernel.h>
> -#include <linux/of.h>
> -#include <linux/pm_runtime.h>
> -#include <linux/slab.h>
> -
> -#include "coresight-priv.h"
> -
> -#define REPLICATOR_IDFILTER0 0x000
> -#define REPLICATOR_IDFILTER1 0x004
> -
> -/**
> - * struct replicator_drvdata - specifics associated to a replicator component
> - * @base: memory mapped base address for this component.
> - * @dev: the device entity associated with this component
> - * @atclk: optional clock for the core parts of the replicator.
> - * @csdev: component vitals needed by the framework
> - */
> -struct replicator_drvdata {
> - void __iomem *base;
> - struct device *dev;
> - struct clk *atclk;
> - struct coresight_device *csdev;
> -};
> -
> -/*
> - * dynamic_replicator_reset : Reset the replicator configuration to sane values.
> - */
> -static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
> -{
> - CS_UNLOCK(drvdata->base);
> -
> - if (!coresight_claim_device_unlocked(drvdata->base)) {
> - writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
> - writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
> - coresight_disclaim_device_unlocked(drvdata->base);
> - }
> -
> - CS_LOCK(drvdata->base);
> -}
> -
> -static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
> - int inport, int outport)
> -{
> - int rc = 0;
> - u32 reg;
> -
> - switch (outport) {
> - case 0:
> - reg = REPLICATOR_IDFILTER0;
> - break;
> - case 1:
> - reg = REPLICATOR_IDFILTER1;
> - break;
> - default:
> - WARN_ON(1);
> - return -EINVAL;
> - }
> -
> - CS_UNLOCK(drvdata->base);
> -
> - if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
> - (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
> - rc = coresight_claim_device_unlocked(drvdata->base);
> -
> - /* Ensure that the outport is enabled. */
> - if (!rc)
> - writel_relaxed(0x00, drvdata->base + reg);
> - CS_LOCK(drvdata->base);
> -
> - return rc;
> -}
> -
> -static int replicator_enable(struct coresight_device *csdev, int inport,
> - int outport)
> -{
> - int rc = 0;
> - struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
> -
> - rc = dynamic_replicator_enable(drvdata, inport, outport);
> - dev_dbg(drvdata->dev, "REPLICATOR enabled\n");
> - return rc;
> -}
> -
> -static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
> - int inport, int outport)
> -{
> - u32 reg;
> -
> - switch (outport) {
> - case 0:
> - reg = REPLICATOR_IDFILTER0;
> - break;
> - case 1:
> - reg = REPLICATOR_IDFILTER1;
> - break;
> - default:
> - WARN_ON(1);
> - return;
> - }
> -
> - CS_UNLOCK(drvdata->base);
> -
> - /* disable the flow of ATB data through port */
> - writel_relaxed(0xff, drvdata->base + reg);
> -
> - if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
> - (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
> - coresight_disclaim_device_unlocked(drvdata->base);
> - CS_LOCK(drvdata->base);
> -}
> -
> -static void replicator_disable(struct coresight_device *csdev, int inport,
> - int outport)
> -{
> - struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
> -
> - dynamic_replicator_disable(drvdata, inport, outport);
> - dev_dbg(drvdata->dev, "REPLICATOR disabled\n");
> -}
> -
> -static const struct coresight_ops_link replicator_link_ops = {
> - .enable = replicator_enable,
> - .disable = replicator_disable,
> -};
> -
> -static const struct coresight_ops replicator_cs_ops = {
> - .link_ops = &replicator_link_ops,
> -};
> -
> -#define coresight_replicator_reg(name, offset) \
> - coresight_simple_reg32(struct replicator_drvdata, name, offset)
> -
> -coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
> -coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
> -
> -static struct attribute *replicator_mgmt_attrs[] = {
> - &dev_attr_idfilter0.attr,
> - &dev_attr_idfilter1.attr,
> - NULL,
> -};
> -
> -static const struct attribute_group replicator_mgmt_group = {
> - .attrs = replicator_mgmt_attrs,
> - .name = "mgmt",
> -};
> -
> -static const struct attribute_group *replicator_groups[] = {
> - &replicator_mgmt_group,
> - NULL,
> -};
> -
> -static int replicator_probe(struct device *dev, struct resource *res)
> -{
> - int ret = 0;
> - struct coresight_platform_data *pdata = NULL;
> - struct replicator_drvdata *drvdata;
> - struct coresight_desc desc = { 0 };
> - struct device_node *np = dev->of_node;
> - void __iomem *base;
> -
> - if (np) {
> - pdata = of_get_coresight_platform_data(dev, np);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - dev->platform_data = pdata;
> - }
> -
> - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> - if (!drvdata)
> - return -ENOMEM;
> -
> - drvdata->dev = dev;
> - drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
> - if (!IS_ERR(drvdata->atclk)) {
> - ret = clk_prepare_enable(drvdata->atclk);
> - if (ret)
> - return ret;
> - }
> -
> - /*
> - * Map the device base for dynamic-replicator, which has been
> - * validated by AMBA core
> - */
> - if (res) {
> - base = devm_ioremap_resource(dev, res);
> - if (IS_ERR(base)) {
> - ret = PTR_ERR(base);
> - goto out_disable_clk;
> - }
> - drvdata->base = base;
> - desc.groups = replicator_groups;
> - }
> -
> - dev_set_drvdata(dev, drvdata);
> -
> - desc.type = CORESIGHT_DEV_TYPE_LINK;
> - desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
> - desc.ops = &replicator_cs_ops;
> - desc.pdata = dev->platform_data;
> - desc.dev = dev;
> - drvdata->csdev = coresight_register(&desc);
> -
> - if (IS_ERR(drvdata->csdev)) {
> - ret = PTR_ERR(drvdata->csdev);
> - goto out_disable_clk;
> - }
> -
> - dynamic_replicator_reset(drvdata);
> - pm_runtime_put(dev);
> -
> -out_disable_clk:
> - if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
> - clk_disable_unprepare(drvdata->atclk);
> - return ret;
> -}
> -
> -static int dynamic_replicator_probe(struct amba_device *adev,
> - const struct amba_id *id)
> -{
> - return replicator_probe(&adev->dev, &adev->res);
> -}
> -
> -#ifdef CONFIG_PM
> -static int replicator_runtime_suspend(struct device *dev)
> -{
> - struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
> -
> - if (drvdata && !IS_ERR(drvdata->atclk))
> - clk_disable_unprepare(drvdata->atclk);
> -
> - return 0;
> -}
> -
> -static int replicator_runtime_resume(struct device *dev)
> -{
> - struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
> -
> - if (drvdata && !IS_ERR(drvdata->atclk))
> - clk_prepare_enable(drvdata->atclk);
> -
> - return 0;
> -}
> -#endif
> -
> -static const struct dev_pm_ops replicator_dev_pm_ops = {
> - SET_RUNTIME_PM_OPS(replicator_runtime_suspend,
> - replicator_runtime_resume,
> - NULL)
> -};
> -
> -static const struct amba_id dynamic_replicator_ids[] = {
> - {
> - .id = 0x000bb909,
> - .mask = 0x000fffff,
> - },
> - {
> - /* Coresight SoC-600 */
> - .id = 0x000bb9ec,
> - .mask = 0x000fffff,
> - },
> - { 0, 0 },
> -};
> -
> -static struct amba_driver dynamic_replicator_driver = {
> - .drv = {
> - .name = "coresight-dynamic-replicator",
> - .pm = &replicator_dev_pm_ops,
> - .suppress_bind_attrs = true,
> - },
> - .probe = dynamic_replicator_probe,
> - .id_table = dynamic_replicator_ids,
> -};
> -builtin_amba_driver(dynamic_replicator_driver);
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 43cbcf1..4e0da85 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -1,10 +1,11 @@
> // SPDX-License-Identifier: GPL-2.0
> /*
> - * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
> *
> * Description: CoreSight Replicator driver
> */
>
> +#include <linux/amba/bus.h>
> #include <linux/kernel.h>
> #include <linux/device.h>
> #include <linux/platform_device.h>
> @@ -18,25 +19,117 @@
>
> #include "coresight-priv.h"
>
> +#define REPLICATOR_IDFILTER0 0x000
> +#define REPLICATOR_IDFILTER1 0x004
> +
> /**
> * struct replicator_drvdata - specifics associated to a replicator component
> + * @base: memory mapped base address for this component. Also indicates
> + * whether this one is programmable or not.
> * @dev: the device entity associated with this component
> * @atclk: optional clock for the core parts of the replicator.
> * @csdev: component vitals needed by the framework
> */
> struct replicator_drvdata {
> + void __iomem *base;
> struct device *dev;
> struct clk *atclk;
> struct coresight_device *csdev;
> };
>
> +static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
> +{
> + CS_UNLOCK(drvdata->base);
> +
> + if (!coresight_claim_device_unlocked(drvdata->base)) {
> + writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
> + writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
> + coresight_disclaim_device_unlocked(drvdata->base);
> + }
> +
> + CS_LOCK(drvdata->base);
> +}
> +
> +/*
> + * replicator_reset : Reset the replicator configuration to sane values.
> + */
> +static inline void replicator_reset(struct replicator_drvdata *drvdata)
> +{
> + if (drvdata->base)
> + dynamic_replicator_reset(drvdata);
> +}
> +
> +static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
> + int inport, int outport)
> +{
> + int rc = 0;
> + u32 reg;
> +
> + switch (outport) {
> + case 0:
> + reg = REPLICATOR_IDFILTER0;
> + break;
> + case 1:
> + reg = REPLICATOR_IDFILTER1;
> + break;
> + default:
> + WARN_ON(1);
> + return -EINVAL;
> + }
> +
> + CS_UNLOCK(drvdata->base);
> +
> + if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
> + (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
> + rc = coresight_claim_device_unlocked(drvdata->base);
> +
> + /* Ensure that the outport is enabled. */
> + if (!rc)
> + writel_relaxed(0x00, drvdata->base + reg);
> + CS_LOCK(drvdata->base);
> +
> + return rc;
> +}
> +
> static int replicator_enable(struct coresight_device *csdev, int inport,
> int outport)
> {
> + int rc = 0;
> struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
>
> - dev_dbg(drvdata->dev, "REPLICATOR enabled\n");
> - return 0;
> + if (drvdata->base)
> + rc = dynamic_replicator_enable(drvdata, inport, outport);
> + if (!rc)
> + dev_dbg(drvdata->dev, "REPLICATOR enabled\n");
> + return rc;
> +}
> +
> +static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
> + int inport, int outport)
> +{
> + u32 reg;
> +
> + switch (outport) {
> + case 0:
> + reg = REPLICATOR_IDFILTER0;
> + break;
> + case 1:
> + reg = REPLICATOR_IDFILTER1;
> + break;
> + default:
> + WARN_ON(1);
> + return;
> + }
> +
> + CS_UNLOCK(drvdata->base);
> +
> + /* disable the flow of ATB data through port */
> + writel_relaxed(0xff, drvdata->base + reg);
> +
> + if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
> + (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
> + coresight_disclaim_device_unlocked(drvdata->base);
> + CS_LOCK(drvdata->base);
> }
>
> static void replicator_disable(struct coresight_device *csdev, int inport,
> @@ -44,6 +137,8 @@ static void replicator_disable(struct coresight_device *csdev, int inport,
> {
> struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
>
> + if (drvdata->base)
> + dynamic_replicator_disable(drvdata, inport, outport);
> dev_dbg(drvdata->dev, "REPLICATOR disabled\n");
> }
>
> @@ -56,13 +151,36 @@ static const struct coresight_ops replicator_cs_ops = {
> .link_ops = &replicator_link_ops,
> };
>
> -static int replicator_probe(struct device *dev)
> +#define coresight_replicator_reg(name, offset) \
> + coresight_simple_reg32(struct replicator_drvdata, name, offset)
> +
> +coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
> +coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
> +
> +static struct attribute *replicator_mgmt_attrs[] = {
> + &dev_attr_idfilter0.attr,
> + &dev_attr_idfilter1.attr,
> + NULL,
> +};
> +
> +static const struct attribute_group replicator_mgmt_group = {
> + .attrs = replicator_mgmt_attrs,
> + .name = "mgmt",
> +};
> +
> +static const struct attribute_group *replicator_groups[] = {
> + &replicator_mgmt_group,
> + NULL,
> +};
> +
> +static int replicator_probe(struct device *dev, struct resource *res)
> {
> int ret = 0;
> struct coresight_platform_data *pdata = NULL;
> struct replicator_drvdata *drvdata;
> struct coresight_desc desc = { 0 };
> struct device_node *np = dev->of_node;
> + void __iomem *base;
>
> if (np) {
> pdata = of_get_coresight_platform_data(dev, np);
> @@ -83,6 +201,20 @@ static int replicator_probe(struct device *dev)
> return ret;
> }
>
> + /*
> + * Map the device base for dynamic-replicator, which has been
> + * validated by AMBA core
> + */
> + if (res) {
> + base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(base)) {
> + ret = PTR_ERR(base);
> + goto out_disable_clk;
> + }
> + drvdata->base = base;
> + desc.groups = replicator_groups;
> + }
> +
> dev_set_drvdata(dev, drvdata);
>
> desc.type = CORESIGHT_DEV_TYPE_LINK;
> @@ -96,6 +228,7 @@ static int replicator_probe(struct device *dev)
> goto out_disable_clk;
> }
>
> + replicator_reset(drvdata);
> pm_runtime_put(dev);
>
> out_disable_clk:
> @@ -112,7 +245,8 @@ static int static_replicator_probe(struct platform_device *pdev)
> pm_runtime_set_active(&pdev->dev);
> pm_runtime_enable(&pdev->dev);
>
> - ret = replicator_probe(&pdev->dev);
> + /* Static replicators do not have programming base */
> + ret = replicator_probe(&pdev->dev, NULL);
>
> if (ret) {
> pm_runtime_put_noidle(&pdev->dev);
> @@ -164,3 +298,33 @@ static struct platform_driver static_replicator_driver = {
> },
> };
> builtin_platform_driver(static_replicator_driver);
> +
> +static int dynamic_replicator_probe(struct amba_device *adev,
> + const struct amba_id *id)
> +{
> + return replicator_probe(&adev->dev, &adev->res);
> +}
> +
> +static const struct amba_id dynamic_replicator_ids[] = {
> + {
> + .id = 0x000bb909,
> + .mask = 0x000fffff,
> + },
> + {
> + /* Coresight SoC-600 */
> + .id = 0x000bb9ec,
> + .mask = 0x000fffff,
> + },
> + { 0, 0 },
> +};
> +
> +static struct amba_driver dynamic_replicator_driver = {
> + .drv = {
> + .name = "coresight-dynamic-replicator",
> + .pm = &replicator_dev_pm_ops,
> + .suppress_bind_attrs = true,
> + },
> + .probe = dynamic_replicator_probe,
> + .id_table = dynamic_replicator_ids,
> +};
> +builtin_amba_driver(dynamic_replicator_driver);
> --
> 2.7.4
>
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