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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c741e0b3c43sm2698912a12.4.2026.03.18.06.49.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Mar 2026 06:49:12 -0700 (PDT) Message-ID: <2bb28022-e77c-4459-8b03-6ee7713798e7@oss.qualcomm.com> Date: Wed, 18 Mar 2026 21:49:07 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v12 6/7] qcom-tgu: Add timer/counter functionality for TGU To: Songwei Chai , andersson@kernel.org, alexander.shishkin@linux.intel.com, mike.leach@linaro.org, konrad.dybcio@oss.qualcomm.com, suzuki.poulose@arm.com, james.clark@arm.com, krzk+dt@kernel.org, conor+dt@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, devicetree@vger.kernel.org, gregkh@linuxfoundation.org References: <20260317032639.2393221-1-songwei.chai@oss.qualcomm.com> <20260317032639.2393221-7-songwei.chai@oss.qualcomm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <20260317032639.2393221-7-songwei.chai@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=TPhIilla c=1 sm=1 tr=0 ts=69baad59 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=x5Cro-eQjQa3ufzbw04A:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-ORIG-GUID: fwiV8GbIdnHULYpi4Zd5ikacNy0yTaC_ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzE4MDExNyBTYWx0ZWRfX9iKlUAneeWms zfAGFxj8HSl5CxVxJLf+PX5QZ8vWVn8128CW3S4w3Ihcj4Yo0Y5NpJRy5R6+5NVfZoE7v8+wwPQ BLzgvo8cjoJfO4EFORjRRJYxduPSd4kLhAGRL3sFdgghFFvyB9KI40BONAZw4+aCaxD7d43BO4S /kZXJIj5tLNYBFQhIz7GqDf8PUNZ4vAgfIwQBnxoleTGNft9J5AYKw4/HffsOMk1qmM4g9d/0tu 7QHJLzFZqvLQSCnhSV0AS+NlFHV8gdGGQK6DrJ2vG3vSOw9JXM5mHlJjxYwqMvF5KFlFitw6ZYA 7bqN+maqRdVcY2dyq8Br426bjmDaKk8Z2CxABjM7ohcU7razme8fkXXEC6UsdijqvqrGJN5sog7 SfwB4imz0fwOKixuIB3c70CKZre+nNtcMtTqPY1BbTfBaP7Gv6NGF6ZIwAg7h//0XFtzqUAd/te jHAf4kL9AVsVecJUTXA== X-Proofpoint-GUID: fwiV8GbIdnHULYpi4Zd5ikacNy0yTaC_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-18_01,2026-03-17_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 spamscore=0 impostorscore=0 adultscore=0 priorityscore=1501 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603180117 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260318_064914_449695_A5E09B45 X-CRM114-Status: GOOD ( 26.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 3/17/2026 11:26 AM, Songwei Chai wrote: > Add counter and timer node for each step which could be > programed if they are to be utilized in trigger event/sequence. > Reviewed-by: Jie Gan > Signed-off-by: Songwei Chai > --- > .../ABI/testing/sysfs-bus-amba-devices-tgu | 14 +++ > drivers/hwtracing/qcom/tgu.c | 116 +++++++++++++++++- > drivers/hwtracing/qcom/tgu.h | 56 +++++++++ > 3 files changed, 184 insertions(+), 2 deletions(-) > > diff --git a/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu b/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu > index d8431a82574a..5370882333bc 100644 > --- a/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu > +++ b/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu > @@ -28,3 +28,17 @@ KernelVersion 7.1 > Contact: Jinlong Mao , Songwei Chai > Description: > (RW) Set/Get the next action with specific step for TGU. > + > +What: /sys/bus/amba/devices//step[0:7]_timer/reg[0:1] > +Date: March 2026 > +KernelVersion 7.1 > +Contact: Jinlong Mao , Songwei Chai > +Description: > + (RW) Set/Get the timer value with specific step for TGU. > + > +What: /sys/bus/amba/devices//step[0:7]_counter/reg[0:1] > +Date: March 2026 > +KernelVersion 7.1 > +Contact: Jinlong Mao , Songwei Chai > +Description: > + (RW) Set/Get the counter value with specific step for TGU. > diff --git a/drivers/hwtracing/qcom/tgu.c b/drivers/hwtracing/qcom/tgu.c > index 1d996b9e303a..4539415571f6 100644 > --- a/drivers/hwtracing/qcom/tgu.c > +++ b/drivers/hwtracing/qcom/tgu.c > @@ -32,6 +32,10 @@ static int calculate_array_location(struct tgu_drvdata *drvdata, > case TGU_CONDITION_SELECT: > return step_index * (drvdata->num_condition_select) + > reg_index; > + case TGU_COUNTER: > + return step_index * (drvdata->num_counter) + reg_index; > + case TGU_TIMER: > + return step_index * (drvdata->num_timer) + reg_index; > default: > break; > } > @@ -77,6 +81,12 @@ static ssize_t tgu_dataset_show(struct device *dev, > case TGU_CONDITION_SELECT: > return sysfs_emit(buf, "0x%x\n", > drvdata->value_table->condition_select[index]); > + case TGU_TIMER: > + return sysfs_emit(buf, "0x%x\n", > + drvdata->value_table->timer[index]); > + case TGU_COUNTER: > + return sysfs_emit(buf, "0x%x\n", > + drvdata->value_table->counter[index]); > default: > break; > } > @@ -122,6 +132,14 @@ static ssize_t tgu_dataset_store(struct device *dev, > tgu_drvdata->value_table->condition_select[index] = val; > ret = size; > break; > + case TGU_TIMER: > + tgu_drvdata->value_table->timer[index] = val; > + ret = size; > + break; > + case TGU_COUNTER: > + tgu_drvdata->value_table->counter[index] = val; > + ret = size; > + break; > default: > ret = -EINVAL; > break; > @@ -163,6 +181,18 @@ static umode_t tgu_node_visible(struct kobject *kobject, > if (tgu_attr->reg_num < drvdata->num_condition_select) > return attr->mode; > break; > + case TGU_COUNTER: > + if (!drvdata->num_counter) > + break; > + if (tgu_attr->reg_num < drvdata->num_counter) > + return attr->mode; > + break; > + case TGU_TIMER: > + if (!drvdata->num_timer) > + break; > + if (tgu_attr->reg_num < drvdata->num_timer) > + return attr->mode; > + break; > default: > break; > } > @@ -213,6 +243,30 @@ static ssize_t tgu_write_all_hw_regs(struct tgu_drvdata *drvdata) > drvdata->base + CONDITION_SELECT_STEP(i, j)); > } > } > + > + for (i = 0; i < drvdata->num_step; i++) { > + for (j = 0; j < drvdata->num_timer; j++) { > + index = check_array_location(drvdata, i, TGU_TIMER, j); > + > + if (index == -EINVAL) > + goto exit; > + > + writel(drvdata->value_table->timer[index], > + drvdata->base + TIMER_COMPARE_STEP(i, j)); > + } > + } > + > + for (i = 0; i < drvdata->num_step; i++) { > + for (j = 0; j < drvdata->num_counter; j++) { > + index = check_array_location(drvdata, i, TGU_COUNTER, j); > + > + if (index == -EINVAL) > + goto exit; > + > + writel(drvdata->value_table->counter[index], > + drvdata->base + COUNTER_COMPARE_STEP(i, j)); > + } > + } > /* Enable TGU to program the triggers */ > writel(1, drvdata->base + TGU_CONTROL); > exit: > @@ -256,6 +310,27 @@ static void tgu_set_conditions(struct tgu_drvdata *drvdata) > drvdata->num_condition_select = TGU_DEVID_CONDITIONS(devid) + 1; > } > > +static void tgu_set_timer_counter(struct tgu_drvdata *drvdata) > +{ > + int num_timers = 0, num_counters = 0; > + u32 devid2; > + > + devid2 = readl(drvdata->base + CORESIGHT_DEVID2); > + > + if (TGU_DEVID2_TIMER0(devid2)) > + num_timers++; > + if (TGU_DEVID2_TIMER1(devid2)) > + num_timers++; > + > + if (TGU_DEVID2_COUNTER0(devid2)) > + num_counters++; > + if (TGU_DEVID2_COUNTER1(devid2)) > + num_counters++; > + > + drvdata->num_timer = num_timers; > + drvdata->num_counter = num_counters; > +} > + > static int tgu_enable(struct device *dev) > { > struct tgu_drvdata *drvdata = dev_get_drvdata(dev); > @@ -395,6 +470,22 @@ static const struct attribute_group *tgu_attr_groups[] = { > CONDITION_SELECT_ATTRIBUTE_GROUP_INIT(5), > CONDITION_SELECT_ATTRIBUTE_GROUP_INIT(6), > CONDITION_SELECT_ATTRIBUTE_GROUP_INIT(7), > + TIMER_ATTRIBUTE_GROUP_INIT(0), > + TIMER_ATTRIBUTE_GROUP_INIT(1), > + TIMER_ATTRIBUTE_GROUP_INIT(2), > + TIMER_ATTRIBUTE_GROUP_INIT(3), > + TIMER_ATTRIBUTE_GROUP_INIT(4), > + TIMER_ATTRIBUTE_GROUP_INIT(5), > + TIMER_ATTRIBUTE_GROUP_INIT(6), > + TIMER_ATTRIBUTE_GROUP_INIT(7), > + COUNTER_ATTRIBUTE_GROUP_INIT(0), > + COUNTER_ATTRIBUTE_GROUP_INIT(1), > + COUNTER_ATTRIBUTE_GROUP_INIT(2), > + COUNTER_ATTRIBUTE_GROUP_INIT(3), > + COUNTER_ATTRIBUTE_GROUP_INIT(4), > + COUNTER_ATTRIBUTE_GROUP_INIT(5), > + COUNTER_ATTRIBUTE_GROUP_INIT(6), > + COUNTER_ATTRIBUTE_GROUP_INIT(7), > NULL, > }; > > @@ -402,8 +493,8 @@ static int tgu_probe(struct amba_device *adev, const struct amba_id *id) > { > struct device *dev = &adev->dev; > struct tgu_drvdata *drvdata; > - unsigned int *priority, *condition, *select; > - size_t priority_size, condition_size, select_size; > + unsigned int *priority, *condition, *select, *timer, *counter; > + size_t priority_size, condition_size, select_size, timer_size, counter_size; > int ret; > > drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); > @@ -422,6 +513,7 @@ static int tgu_probe(struct amba_device *adev, const struct amba_id *id) > tgu_set_reg_number(drvdata); > tgu_set_steps(drvdata); > tgu_set_conditions(drvdata); > + tgu_set_timer_counter(drvdata); > > ret = sysfs_create_groups(&dev->kobj, tgu_attr_groups); > if (ret) { > @@ -464,6 +556,26 @@ static int tgu_probe(struct amba_device *adev, const struct amba_id *id) > > drvdata->value_table->condition_select = select; > > + timer_size = drvdata->num_step * drvdata->num_timer; > + > + timer = devm_kcalloc(dev, timer_size, > + sizeof(*(drvdata->value_table->timer)), > + GFP_KERNEL); > + if (!timer) > + return -ENOMEM; > + > + drvdata->value_table->timer = timer; > + > + counter_size = drvdata->num_step * drvdata->num_counter; > + > + counter = devm_kcalloc(dev, counter_size, > + sizeof(*(drvdata->value_table->counter)), > + GFP_KERNEL); > + if (!counter) > + return -ENOMEM; > + > + drvdata->value_table->counter = counter; > + > drvdata->enabled = false; > > pm_runtime_put(&adev->dev); > diff --git a/drivers/hwtracing/qcom/tgu.h b/drivers/hwtracing/qcom/tgu.h > index ac46a2875209..5dfef0afbad6 100644 > --- a/drivers/hwtracing/qcom/tgu.h > +++ b/drivers/hwtracing/qcom/tgu.h > @@ -11,6 +11,7 @@ > #define TGU_LAR 0xfb0 > #define TGU_UNLOCK_OFFSET 0xc5acce55 > #define TGU_DEVID 0xfc8 > +#define CORESIGHT_DEVID2 0xfc0 > > #define TGU_DEVID_SENSE_INPUT(devid_val) \ > ((int)FIELD_GET(GENMASK(17, 10), devid_val)) > @@ -18,6 +19,16 @@ > ((int)FIELD_GET(GENMASK(6, 3), devid_val)) > #define TGU_DEVID_CONDITIONS(devid_val) \ > ((int)FIELD_GET(GENMASK(2, 0), devid_val)) > +#define TGU_DEVID2_TIMER0(devid_val) \ > + ((int)FIELD_GET(GENMASK(23, 18), devid_val)) > +#define TGU_DEVID2_TIMER1(devid_val) \ > + ((int)FIELD_GET(GENMASK(17, 13), devid_val)) > +#define TGU_DEVID2_COUNTER0(devid_val) \ > + ((int)FIELD_GET(GENMASK(11, 6), devid_val)) > +#define TGU_DEVID2_COUNTER1(devid_val) \ > + ((int)FIELD_GET(GENMASK(5, 0), devid_val)) > + > + > #define TGU_BITS_PER_SIGNAL 4 > #define LENGTH_REGISTER 32 > > @@ -53,6 +64,8 @@ > #define PRIORITY_START_OFFSET 0x0074 > #define CONDITION_DECODE_OFFSET 0x0050 > #define CONDITION_SELECT_OFFSET 0x0060 > +#define TIMER_START_OFFSET 0x0040 > +#define COUNTER_START_OFFSET 0x0048 > #define PRIORITY_OFFSET 0x60 > #define REG_OFFSET 0x4 > > @@ -67,6 +80,12 @@ > #define CONDITION_SELECT_STEP(step, select) \ > (CONDITION_SELECT_OFFSET + REG_OFFSET * select + STEP_OFFSET * step) > > +#define TIMER_COMPARE_STEP(step, timer) \ > + (TIMER_START_OFFSET + REG_OFFSET * timer + STEP_OFFSET * step) > + > +#define COUNTER_COMPARE_STEP(step, counter) \ > + (COUNTER_START_OFFSET + REG_OFFSET * counter + STEP_OFFSET * step) > + > #define tgu_dataset_rw(name, step_index, type, reg_num) \ > (&((struct tgu_attribute[]){ { \ > __ATTR(name, 0644, tgu_dataset_show, tgu_dataset_store), \ > @@ -82,6 +101,10 @@ > tgu_dataset_rw(reg##reg_num, step_index, TGU_CONDITION_DECODE, reg_num) > #define STEP_SELECT(step_index, reg_num) \ > tgu_dataset_rw(reg##reg_num, step_index, TGU_CONDITION_SELECT, reg_num) > +#define STEP_TIMER(step_index, reg_num) \ > + tgu_dataset_rw(reg##reg_num, step_index, TGU_TIMER, reg_num) > +#define STEP_COUNTER(step_index, reg_num) \ > + tgu_dataset_rw(reg##reg_num, step_index, TGU_COUNTER, reg_num) > > #define STEP_PRIORITY_LIST(step_index, priority) \ > {STEP_PRIORITY(step_index, 0, priority), \ > @@ -122,6 +145,18 @@ > NULL \ > } > > +#define STEP_TIMER_LIST(n) \ > + {STEP_TIMER(n, 0), \ > + STEP_TIMER(n, 1), \ > + NULL \ > + } > + > +#define STEP_COUNTER_LIST(n) \ > + {STEP_COUNTER(n, 0), \ > + STEP_COUNTER(n, 1), \ > + NULL \ > + } > + > #define PRIORITY_ATTRIBUTE_GROUP_INIT(step, priority)\ > (&(const struct attribute_group){\ > .attrs = (struct attribute*[])STEP_PRIORITY_LIST(step, priority),\ > @@ -143,6 +178,19 @@ > .name = "step" #step "_condition_select" \ > }) > > +#define TIMER_ATTRIBUTE_GROUP_INIT(step)\ > + (&(const struct attribute_group){\ > + .attrs = (struct attribute*[])STEP_TIMER_LIST(step),\ > + .is_visible = tgu_node_visible,\ > + .name = "step" #step "_timer" \ > + }) > + > +#define COUNTER_ATTRIBUTE_GROUP_INIT(step)\ > + (&(const struct attribute_group){\ > + .attrs = (struct attribute*[])STEP_COUNTER_LIST(step),\ > + .is_visible = tgu_node_visible,\ > + .name = "step" #step "_counter" \ > + }) > > enum operation_index { > TGU_PRIORITY0, > @@ -151,6 +199,8 @@ enum operation_index { > TGU_PRIORITY3, > TGU_CONDITION_DECODE, > TGU_CONDITION_SELECT, > + TGU_TIMER, > + TGU_COUNTER > }; > > /* Maximum priority that TGU supports */ > @@ -167,6 +217,8 @@ struct value_table { > unsigned int *priority; > unsigned int *condition_decode; > unsigned int *condition_select; > + unsigned int *timer; > + unsigned int *counter; > }; > > static inline void TGU_LOCK(void __iomem *addr) > @@ -198,6 +250,8 @@ static inline void TGU_UNLOCK(void __iomem *addr) > * @num_step: Maximum step size > * @num_condition_decode: Maximum number of condition_decode > * @num_condition_select: Maximum number of condition_select > + * @num_timer: Maximum number of timers > + * @num_counter: Maximum number of counters > * > * This structure defines the data associated with a TGU device, > * including its base address, device pointers, clock, spinlock for > @@ -214,6 +268,8 @@ struct tgu_drvdata { > int num_step; > int num_condition_decode; > int num_condition_select; > + int num_timer; > + int num_counter; > }; > > #endif