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2 weeks, 5 days

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2 weeks, 5 days

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2 weeks, 5 days

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2 weeks, 5 days

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2 weeks, 5 days

Lumexa Skin Brightening Serum – Glow-Boosting Formula for Clear Skin

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2 weeks, 5 days

[PATCH v4 0/3] Coresight TMC-ETR: refactor the tmc-etr mode and some cleanups

by Junhao He

This patchset builds upon Yicong's previous patches [1]. Patch 2 introducing fix race issues found by using TMC-ETR. Patch 1 & 3 introducing two cleanups found when debugging the issues. [1] https://lore.kernel.org/linux-arm-kernel/20241202092419.11777-1-yangyicong@… --- Changes in v4: - a) Add comment at the context of set etr to sysfs mode. - b) Move the check on drvdata->read to the start of enable etr. - c) Add checks to prevent multiple sysfs processes from simultaneously competing to enable ETR. - d) Fix the issue with the guard used. Link: https://lore.kernel.org/linux-arm-kernel/20250818080600.418425-1-hejunhao3@… --- Changes in v3: - Patches 1: Additional comment for tmc_drvdata::etr_mode. Update comment for tmc_drvdata::reading with Jonathan's Tag. - Patches 2: Replace scoped_guard with guard with Jonathan's Tag. - Patches 2: Fix spinlock to raw_spinlock, and refactor this code based on Leo's suggested solution. - Patches 3: change the size's type to ssize_t and use max_t to simplify the code with Leo's Tag. Link: https://lore.kernel.org/linux-arm-kernel/20250620075412.952934-1-hejunhao3@… Changes in v2: - Updated the commit of patch2. - Rebase to v6.16-rc1 Junhao He (1): coresight: tmc: refactor the tmc-etr mode setting to avoid race conditions Yicong Yang (2): coresight: tmc: Add missing doc including reading and etr_mode of struct tmc_drvdata coresight: tmc: Decouple the perf buffer allocation from sysfs mode .../hwtracing/coresight/coresight-tmc-etr.c | 136 +++++++++--------- drivers/hwtracing/coresight/coresight-tmc.h | 2 + 2 files changed, 66 insertions(+), 72 deletions(-) -- 2.33.0

2 weeks, 5 days

Re: [PATCH v7 3/4] coresight: tpda: add logic to configure TPDA_SYNCR register

by Suzuki K Poulose

On 23/12/2025 08:41, Jie Gan wrote: > From: Tao Zhang <tao.zhang(a)oss.qualcomm.com> > > The TPDA_SYNC counter tracks the number of bytes transferred from the > aggregator. When this count reaches the value programmed in the > TPDA_SYNCR register, an ASYNC request is triggered, allowing userspace > tools to accurately parse each valid packet. > > Signed-off-by: Tao Zhang <tao.zhang(a)oss.qualcomm.com> > Reviewed-by: James Clark <james.clark(a)linaro.org> > Co-developed-by: Jie Gan <jie.gan(a)oss.qualcomm.com> > Signed-off-by: Jie Gan <jie.gan(a)oss.qualcomm.com> > --- > .../ABI/testing/sysfs-bus-coresight-devices-tpda | 18 +++++ > drivers/hwtracing/coresight/coresight-tpda.c | 90 ++++++++++++++++++++++ > drivers/hwtracing/coresight/coresight-tpda.h | 10 +++ > 3 files changed, 118 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > index c8bc7b19ab25..c989eea1ef59 100644 > --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > @@ -41,3 +41,21 @@ Contact: Jinlong Mao <jinlong.mao(a)oss.qualcomm.com>, Tao Zhang <tao.zhang(a)oss.qu > Description: > (RW) Set global (all ports) flush request bit. The bit remains set until a > global flush request sequence completes. > + > +What: /sys/bus/coresight/devices/<tpda-name>/syncr_mode > +Date: December 2025 > +KernelVersion: 6.19 > +Contact: Jinlong Mao <jinlong.mao(a)oss.qualcomm.com>, Tao Zhang <tao.zhang(a)oss.qualcomm.com>, Jie Gan <jie.gan(a)oss.qualcomm.com> > +Description: > + (RW) Set mode the of the syncr counter. > + mode 0 - COUNT[11:0] value represents the approximate number of bytes moved between two ASYNC packet requests > + mode 1 - the bits COUNT[11:7] are used as a power of 2. for example, we could insert an async packet every 8K > + data by writing a value 13 to the COUNT[11:7] field. > + > +What: /sys/bus/coresight/devices/<tpda-name>/syncr_count > +Date: December 2025 > +KernelVersion: 6.19 > +Contact: Jinlong Mao <jinlong.mao(a)oss.qualcomm.com>, Tao Zhang <tao.zhang(a)oss.qualcomm.com>, Jie Gan <jie.gan(a)oss.qualcomm.com> > +Description: > + (RW) Set value the of the syncr counter. > + Range: 0-4095 > diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c > index d24a9098f1b1..8283e16ec400 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.c > +++ b/drivers/hwtracing/coresight/coresight-tpda.c > @@ -163,6 +163,20 @@ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata) > */ > if (drvdata->trig_flag_ts) > writel_relaxed(0x0, drvdata->base + TPDA_FPID_CR); > + > + /* Initialize with a value of 0 */ > + val = 0; > + if (drvdata->syncr_mode) > + val |= TPDA_SYNCR_MODE_CTRL_MASK; > + > + if (drvdata->syncr_count > 0 && > + drvdata->syncr_count < TPDA_SYNCR_COUNT_MASK) > + val |= drvdata->syncr_count; > + else > + /* Program the count to its MAX value by default */ > + val |= TPDA_SYNCR_COUNT_MASK; > + > + writel_relaxed(val, drvdata->base + TPDA_SYNCR); > } > > static int tpda_enable_port(struct tpda_drvdata *drvdata, int port) > @@ -385,8 +399,84 @@ static ssize_t global_flush_req_store(struct device *dev, > } > static DEVICE_ATTR_RW(global_flush_req); > > +static ssize_t syncr_mode_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + unsigned long val, syncr_val; > + > + if (!drvdata->csdev->refcnt) > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + syncr_val = readl_relaxed(drvdata->base + TPDA_SYNCR); > + val = FIELD_GET(TPDA_SYNCR_MODE_CTRL_MASK, syncr_val); > + > + return sysfs_emit(buf, "%lu\n", val); > +} > + > +static ssize_t syncr_mode_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, > + size_t size) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + unsigned long val; > + > + if (kstrtoul(buf, 0, &val)) > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + /* set the mode when first enabling the device */ > + drvdata->syncr_mode = !!val; > + > + return size; > +} > +static DEVICE_ATTR_RW(syncr_mode); > + > +static ssize_t syncr_count_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + unsigned long val; > + > + if (!drvdata->csdev->refcnt) > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + val = readl_relaxed(drvdata->base + TPDA_SYNCR); > + val &= TPDA_SYNCR_COUNT_MASK; > + > + return sysfs_emit(buf, "%lu\n", val); > +} > + > +static ssize_t syncr_count_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, > + size_t size) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + unsigned long val; > + > + if (kstrtoul(buf, 0, &val)) > + return -EINVAL; > + > + if (val < 0 || val > TPDA_SYNCR_COUNT_MASK) Checking "val < 0" for an unsigned type is invalid. Simply keep the second part. Suzuki > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + drvdata->syncr_count = val; > + > + return size; > +} > +static DEVICE_ATTR_RW(syncr_count); > + > static struct attribute *tpda_attrs[] = { > &dev_attr_global_flush_req.attr, > + &dev_attr_syncr_mode.attr, > + &dev_attr_syncr_count.attr, > tpda_trig_sysfs_rw(freq_ts_enable, FREQTS), > tpda_trig_sysfs_rw(trig_freq_enable, FRIE), > tpda_trig_sysfs_rw(trig_flag_ts_enable, FLRIE), > diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h > index 1cc9253293ec..56d35697303a 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.h > +++ b/drivers/hwtracing/coresight/coresight-tpda.h > @@ -9,6 +9,7 @@ > #define TPDA_CR (0x000) > #define TPDA_Pn_CR(n) (0x004 + (n * 4)) > #define TPDA_FPID_CR (0x084) > +#define TPDA_SYNCR (0x08C) > > /* Cross trigger global (all ports) flush request bit */ > #define TPDA_CR_FLREQ BIT(0) > @@ -36,6 +37,11 @@ > /* Aggregator port DSB data set element size bit */ > #define TPDA_Pn_CR_DSBSIZE BIT(8) > > +/* TPDA_SYNCR count mask */ > +#define TPDA_SYNCR_COUNT_MASK GENMASK(11, 0) > +/* TPDA_SYNCR mode control bit */ > +#define TPDA_SYNCR_MODE_CTRL_MASK GENMASK(12, 12) > + > #define TPDA_MAX_INPORTS 32 > > /** > @@ -52,6 +58,8 @@ > * @trig_freq: Enable/disable cross trigger FREQ packet request interface. > * @freq_ts: Enable/disable the timestamp for all FREQ packets. > * @cmbchan_mode: Configure the CMB/MCMB channel mode. > + * @syncr_mode: Setting the mode for counting packets. > + * @syncr_count: Setting the value of the count. > */ > struct tpda_drvdata { > void __iomem *base; > @@ -66,6 +74,8 @@ struct tpda_drvdata { > bool trig_freq; > bool freq_ts; > bool cmbchan_mode; > + bool syncr_mode; > + u32 syncr_count; > }; > > /* Enumerate members of global control register(cr) */ >

3 weeks, 4 days

Re: [PATCH v6 4/4] coresight: tpda: add sysfs node to flush specific port

by Suzuki K Poulose

On 23/12/2025 02:16, Jie Gan wrote: > > > On 12/22/2025 9:12 PM, Suzuki K Poulose wrote: >> On 22/12/2025 06:02, Jie Gan wrote: >>> From: Tao Zhang <tao.zhang(a)oss.qualcomm.com> >>> >>> Setting bit i in the TPDA_FLUSH_CR register initiates a flush request >>> for port i, forcing the data to synchronize and be transmitted to the >>> sink device. >>> >>> Signed-off-by: Tao Zhang <tao.zhang(a)oss.qualcomm.com> >>> Reviewed-by: James Clark <james.clark(a)linaro.org> >>> Co-developed-by: Jie Gan <jie.gan(a)oss.qualcomm.com> >>> Signed-off-by: Jie Gan <jie.gan(a)oss.qualcomm.com> >>> --- >>> .../ABI/testing/sysfs-bus-coresight-devices-tpda | 7 ++++ >>> drivers/hwtracing/coresight/coresight-tpda.c | 40 +++++++++++ >>> + ++++++++++ >>> drivers/hwtracing/coresight/coresight-tpda.h | 1 + >>> 3 files changed, 48 insertions(+) >>> >>> diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices- >>> tpda b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda >>> index d359d90dca72..df8f03d4b573 100644 >>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda >>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda >>> @@ -51,3 +51,10 @@ Description: >>> mode 0 - COUNT[11:0] value represents the approximate >>> number of bytes moved between two ASYNC packet requests >>> mode 1 - the bits COUNT[11:7] are used as a power of 2. for >>> example, we could insert an async packet every 8K >>> data by writing a value 13 to the COUNT[11:7] field. >>> + >>> +What: /sys/bus/coresight/devices/<tpda-name>/port_flush_req >>> +Date: December 2025 >>> +KernelVersion: 6.19 >>> +Contact: Jinlong Mao <jinlong.mao(a)oss.qualcomm.com>, Tao Zhang >>> <tao.zhang(a)oss.qualcomm.com>, Jie Gan <jie.gan(a)oss.qualcomm.com> >>> +Description: >>> + (RW) Configure the bit i to requests a flush operation of >>> port i on the TPDA. >> >> Does this have similar semantics as the "global_flush_req" for "Read" ? > > Yes, global_flush_req triggers all ports at once, whereas this node > initiates a flush request for specific port(s). > > For reading, we can check whether the flush request has completed. Please document it as such. Suzuki > > Thanks, > Jie > >> i.e., the bit stays set until the request completes ? Otherwise, why >> isn't this Write only ? >> >> I don't see the point of "Reading" this value back. >> >> Suzuki >> >>> diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/ >>> hwtracing/coresight/coresight-tpda.c >>> index 7baa8a0965d3..f79fea4fbb2c 100644 >>> --- a/drivers/hwtracing/coresight/coresight-tpda.c >>> +++ b/drivers/hwtracing/coresight/coresight-tpda.c >>> @@ -430,9 +430,49 @@ static ssize_t syncr_mode_store(struct device *dev, >>> } >>> static DEVICE_ATTR_RW(syncr_mode); >>> +static ssize_t port_flush_req_show(struct device *dev, >>> + struct device_attribute *attr, >>> + char *buf) >>> +{ >>> + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); >>> + unsigned long val; >>> + >>> + if (!drvdata->csdev->refcnt) >>> + return -EINVAL; >>> + >>> + guard(spinlock)(&drvdata->spinlock); >>> + val = readl_relaxed(drvdata->base + TPDA_FLUSH_CR); >>> + >>> + return sysfs_emit(buf, "0x%lx\n", val); >>> +} >>> + >>> +static ssize_t port_flush_req_store(struct device *dev, >>> + struct device_attribute *attr, >>> + const char *buf, >>> + size_t size) >>> +{ >>> + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); >>> + u32 val; >>> + >>> + if (kstrtou32(buf, 0, &val)) >>> + return -EINVAL; >>> + >>> + if (!drvdata->csdev->refcnt || !val) >>> + return -EINVAL; >>> + >>> + guard(spinlock)(&drvdata->spinlock); >>> + CS_UNLOCK(drvdata->base); >>> + writel_relaxed(val, drvdata->base + TPDA_FLUSH_CR); >>> + CS_LOCK(drvdata->base); >>> + >>> + return size; >>> +} >>> +static DEVICE_ATTR_RW(port_flush_req); >>> + >>> static struct attribute *tpda_attrs[] = { >>> &dev_attr_global_flush_req.attr, >>> &dev_attr_syncr_mode.attr, >>> + &dev_attr_port_flush_req.attr, >>> tpda_trig_sysfs_rw(freq_ts_enable, FREQTS), >>> tpda_trig_sysfs_rw(trig_freq_enable, FRIE), >>> tpda_trig_sysfs_rw(trig_flag_ts_enable, FLRIE), >>> diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/ >>> hwtracing/coresight/coresight-tpda.h >>> index 1d2de50bb9f9..ef1ce2ce36a9 100644 >>> --- a/drivers/hwtracing/coresight/coresight-tpda.h >>> +++ b/drivers/hwtracing/coresight/coresight-tpda.h >>> @@ -10,6 +10,7 @@ >>> #define TPDA_Pn_CR(n) (0x004 + (n * 4)) >>> #define TPDA_FPID_CR (0x084) >>> #define TPDA_SYNCR (0x08C) >>> +#define TPDA_FLUSH_CR (0x090) >>> /* Cross trigger global (all ports) flush request bit */ >>> #define TPDA_CR_FLREQ BIT(0) >>> >> >

3 weeks, 4 days

Re: [PATCH v6 4/4] coresight: tpda: add sysfs node to flush specific port

by Suzuki K Poulose

On 22/12/2025 06:02, Jie Gan wrote: > From: Tao Zhang <tao.zhang(a)oss.qualcomm.com> > > Setting bit i in the TPDA_FLUSH_CR register initiates a flush request > for port i, forcing the data to synchronize and be transmitted to the > sink device. > > Signed-off-by: Tao Zhang <tao.zhang(a)oss.qualcomm.com> > Reviewed-by: James Clark <james.clark(a)linaro.org> > Co-developed-by: Jie Gan <jie.gan(a)oss.qualcomm.com> > Signed-off-by: Jie Gan <jie.gan(a)oss.qualcomm.com> > --- > .../ABI/testing/sysfs-bus-coresight-devices-tpda | 7 ++++ > drivers/hwtracing/coresight/coresight-tpda.c | 40 ++++++++++++++++++++++ > drivers/hwtracing/coresight/coresight-tpda.h | 1 + > 3 files changed, 48 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > index d359d90dca72..df8f03d4b573 100644 > --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda > @@ -51,3 +51,10 @@ Description: > mode 0 - COUNT[11:0] value represents the approximate number of bytes moved between two ASYNC packet requests > mode 1 - the bits COUNT[11:7] are used as a power of 2. for example, we could insert an async packet every 8K > data by writing a value 13 to the COUNT[11:7] field. > + > +What: /sys/bus/coresight/devices/<tpda-name>/port_flush_req > +Date: December 2025 > +KernelVersion: 6.19 > +Contact: Jinlong Mao <jinlong.mao(a)oss.qualcomm.com>, Tao Zhang <tao.zhang(a)oss.qualcomm.com>, Jie Gan <jie.gan(a)oss.qualcomm.com> > +Description: > + (RW) Configure the bit i to requests a flush operation of port i on the TPDA. Does this have similar semantics as the "global_flush_req" for "Read" ? i.e., the bit stays set until the request completes ? Otherwise, why isn't this Write only ? I don't see the point of "Reading" this value back. Suzuki > diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c > index 7baa8a0965d3..f79fea4fbb2c 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.c > +++ b/drivers/hwtracing/coresight/coresight-tpda.c > @@ -430,9 +430,49 @@ static ssize_t syncr_mode_store(struct device *dev, > } > static DEVICE_ATTR_RW(syncr_mode); > > +static ssize_t port_flush_req_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + unsigned long val; > + > + if (!drvdata->csdev->refcnt) > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + val = readl_relaxed(drvdata->base + TPDA_FLUSH_CR); > + > + return sysfs_emit(buf, "0x%lx\n", val); > +} > + > +static ssize_t port_flush_req_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, > + size_t size) > +{ > + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); > + u32 val; > + > + if (kstrtou32(buf, 0, &val)) > + return -EINVAL; > + > + if (!drvdata->csdev->refcnt || !val) > + return -EINVAL; > + > + guard(spinlock)(&drvdata->spinlock); > + CS_UNLOCK(drvdata->base); > + writel_relaxed(val, drvdata->base + TPDA_FLUSH_CR); > + CS_LOCK(drvdata->base); > + > + return size; > +} > +static DEVICE_ATTR_RW(port_flush_req); > + > static struct attribute *tpda_attrs[] = { > &dev_attr_global_flush_req.attr, > &dev_attr_syncr_mode.attr, > + &dev_attr_port_flush_req.attr, > tpda_trig_sysfs_rw(freq_ts_enable, FREQTS), > tpda_trig_sysfs_rw(trig_freq_enable, FRIE), > tpda_trig_sysfs_rw(trig_flag_ts_enable, FLRIE), > diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h > index 1d2de50bb9f9..ef1ce2ce36a9 100644 > --- a/drivers/hwtracing/coresight/coresight-tpda.h > +++ b/drivers/hwtracing/coresight/coresight-tpda.h > @@ -10,6 +10,7 @@ > #define TPDA_Pn_CR(n) (0x004 + (n * 4)) > #define TPDA_FPID_CR (0x084) > #define TPDA_SYNCR (0x08C) > +#define TPDA_FLUSH_CR (0x090) > > /* Cross trigger global (all ports) flush request bit */ > #define TPDA_CR_FLREQ BIT(0) >

3 weeks, 5 days

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