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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2e53ccd2564sm1135168eec.18.2026.04.17.00.34.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Apr 2026 00:34:04 -0700 (PDT) From: Songwei Chai To: 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: Songwei Chai , 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, Jie Gan Subject: [PATCH v14 4/7] qcom-tgu: Add TGU decode support Date: Fri, 17 Apr 2026 00:33:33 -0700 Message-Id: <20260417073336.2712426-5-songwei.chai@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260417073336.2712426-1-songwei.chai@oss.qualcomm.com> References: <20260417073336.2712426-1-songwei.chai@oss.qualcomm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE3MDA3NCBTYWx0ZWRfX39O9MZJvSE4t es8xFfp75Ha7FAahW3cggoFzBBRN55Q1upA6Xp12Y/eUD9LTioBRBXLbhHJ4wG6OHGaj4szVO5f eT2m1883kTUyokO1AWyHNzCh9s6O122ItpRfGBqRv5xdt96iiM/5MIiVy67/p3xe9qr13zlsjFm ubiExyQbs2K5yAaBavY9NIxJTbVyTddCyBYHF7yofGyDKkC0dC9ZDOG3/XYhFSfqixviV6AsHXQ iCCK1Js2zPbg1Ljjdz51jHJFcHOU0FUgkTb97+K1FUeqc0n3CdGIpG+FPhEeS+Q5RtEhE/uJ0FB CLR+y3f9UO+0aHq119bBAyR4RF2EdCYoGO0jn1BB6sNexPj8IzHlgXM6KKjCeqakUD8Ec7HVsFQ pJAPmSefNtxvLOuuy9+wWK1BsYs1thAdFr7TvH+/wV+60SibWqKfaAmiDi34tgRacm5L6EXNn9q 9elRaoPPS1T5y/sufqQ== X-Proofpoint-ORIG-GUID: CpcQo7gaSdO0IzudghdNr45vU2SFrop1 X-Proofpoint-GUID: CpcQo7gaSdO0IzudghdNr45vU2SFrop1 X-Authority-Analysis: v=2.4 cv=DfInbPtW c=1 sm=1 tr=0 ts=69e1e2ac cx=c_pps a=Uww141gWH0fZj/3QKPojxA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=p0PFFVR7nGJo5X-0Br8A:9 a=PxkB5W3o20Ba91AHUih5:22 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=2026-04-16_04,2026-04-16_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 clxscore=1015 priorityscore=1501 phishscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604170074 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260417_003510_223065_098B5559 X-CRM114-Status: GOOD ( 22.51 ) 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 Decoding is when all the potential pieces for creating a trigger are brought together for a given step. Example - there may be a counter keeping track of some occurrences and a priority-group that is being used to detect a pattern on the sense inputs. These 2 inputs to condition_decode must be programmed, for a given step, to establish the condition for the trigger, or movement to another steps. Reviewed-by: Jie Gan Signed-off-by: Songwei Chai --- .../ABI/testing/sysfs-bus-amba-devices-tgu | 7 + drivers/hwtracing/qcom/tgu.c | 157 +++++++++++++++--- drivers/hwtracing/qcom/tgu.h | 27 +++ 3 files changed, 170 insertions(+), 21 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu b/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu index 223873789ca6..4ef0d696d3d0 100644 --- a/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu +++ b/Documentation/ABI/testing/sysfs-bus-amba-devices-tgu @@ -14,3 +14,10 @@ KernelVersion: 7.1 Contact: Jinlong Mao , Songwei Chai Description: (RW) Set/Get the sensed signal with specific step and priority for TGU. + +What: /sys/bus/amba/devices//step[0:7]_condition_decode/reg[0:3] +Date: April 2026 +KernelVersion: 7.1 +Contact: Jinlong Mao , Songwei Chai +Description: + (RW) Set/Get the decode mode with specific step for TGU. diff --git a/drivers/hwtracing/qcom/tgu.c b/drivers/hwtracing/qcom/tgu.c index 7d69986c3e3d..937211923d93 100644 --- a/drivers/hwtracing/qcom/tgu.c +++ b/drivers/hwtracing/qcom/tgu.c @@ -18,8 +18,33 @@ static int calculate_array_location(struct tgu_drvdata *drvdata, int step_index, int operation_index, int reg_index) { - return operation_index * (drvdata->num_step) * (drvdata->num_reg) + - step_index * (drvdata->num_reg) + reg_index; + switch (operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + return operation_index * (drvdata->num_step) * + (drvdata->num_reg) + + step_index * (drvdata->num_reg) + reg_index; + case TGU_CONDITION_DECODE: + return step_index * (drvdata->num_condition_decode) + + reg_index; + default: + break; + } + + return -EINVAL; +} + +static int check_array_location(struct tgu_drvdata *drvdata, int step, + int ops, int reg) +{ + int result = calculate_array_location(drvdata, step, ops, reg); + + if (result == -EINVAL) + dev_err(drvdata->dev, "check array location - Fail\n"); + + return result; } static ssize_t tgu_dataset_show(struct device *dev, @@ -30,12 +55,26 @@ static ssize_t tgu_dataset_show(struct device *dev, container_of(attr, struct tgu_attribute, attr); int index; - index = calculate_array_location(drvdata, tgu_attr->step_index, - tgu_attr->operation_index, - tgu_attr->reg_num); - - return sysfs_emit(buf, "0x%x\n", - drvdata->value_table->priority[index]); + index = check_array_location(drvdata, tgu_attr->step_index, + tgu_attr->operation_index, tgu_attr->reg_num); + + if (index == -EINVAL) + return index; + + switch (tgu_attr->operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + return sysfs_emit(buf, "0x%x\n", + drvdata->value_table->priority[index]); + case TGU_CONDITION_DECODE: + return sysfs_emit(buf, "0x%x\n", + drvdata->value_table->condition_decode[index]); + default: + break; + } + return -EINVAL; } static ssize_t tgu_dataset_store(struct device *dev, @@ -54,13 +93,31 @@ static ssize_t tgu_dataset_store(struct device *dev, return ret; guard(spinlock)(&tgu_drvdata->lock); - index = calculate_array_location(tgu_drvdata, tgu_attr->step_index, + index = check_array_location(tgu_drvdata, tgu_attr->step_index, tgu_attr->operation_index, tgu_attr->reg_num); - tgu_drvdata->value_table->priority[index] = val; + if (index == -EINVAL) + return index; + + switch (tgu_attr->operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + tgu_drvdata->value_table->priority[index] = val; + ret = size; + break; + case TGU_CONDITION_DECODE: + tgu_drvdata->value_table->condition_decode[index] = val; + ret = size; + break; + default: + ret = -EINVAL; + break; + } - return size; + return ret; } static umode_t tgu_node_visible(struct kobject *kobject, @@ -77,13 +134,26 @@ static umode_t tgu_node_visible(struct kobject *kobject, if (tgu_attr->step_index >= drvdata->num_step) return SYSFS_GROUP_INVISIBLE; - if (tgu_attr->reg_num >= drvdata->num_reg) - return 0; + switch (tgu_attr->operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + if (tgu_attr->reg_num < drvdata->num_reg) + return attr->mode; + break; + case TGU_CONDITION_DECODE: + if (tgu_attr->reg_num < drvdata->num_condition_decode) + return attr->mode; + break; + default: + break; + } - return attr->mode; + return 0; } -static void tgu_write_all_hw_regs(struct tgu_drvdata *drvdata) +static ssize_t tgu_write_all_hw_regs(struct tgu_drvdata *drvdata) { int i, j, k, index; @@ -91,8 +161,10 @@ static void tgu_write_all_hw_regs(struct tgu_drvdata *drvdata) for (i = 0; i < drvdata->num_step; i++) { for (j = 0; j < MAX_PRIORITY; j++) { for (k = 0; k < drvdata->num_reg; k++) { - index = calculate_array_location( + index = check_array_location( drvdata, i, j, k); + if (index == -EINVAL) + goto exit; writel(drvdata->value_table->priority[index], drvdata->base + @@ -100,9 +172,23 @@ static void tgu_write_all_hw_regs(struct tgu_drvdata *drvdata) } } } + + for (i = 0; i < drvdata->num_step; i++) { + for (j = 0; j < drvdata->num_condition_decode; j++) { + index = check_array_location(drvdata, i, + TGU_CONDITION_DECODE, j); + if (index == -EINVAL) + goto exit; + + writel(drvdata->value_table->condition_decode[index], + drvdata->base + CONDITION_DECODE_STEP(i, j)); + } + } /* Enable TGU to program the triggers */ writel(1, drvdata->base + TGU_CONTROL); +exit: TGU_LOCK(drvdata->base); + return index >= 0 ? 0 : -EINVAL; } static void tgu_set_reg_number(struct tgu_drvdata *drvdata) @@ -131,16 +217,26 @@ static void tgu_set_steps(struct tgu_drvdata *drvdata) drvdata->num_step = TGU_DEVID_STEPS(devid); } +static void tgu_set_conditions(struct tgu_drvdata *drvdata) +{ + u32 devid; + + devid = readl(drvdata->base + TGU_DEVID); + drvdata->num_condition_decode = TGU_DEVID_CONDITIONS(devid); +} + static int tgu_enable(struct device *dev) { struct tgu_drvdata *drvdata = dev_get_drvdata(dev); + int ret; guard(spinlock)(&drvdata->lock); - drvdata->enabled = true; - tgu_write_all_hw_regs(drvdata); + ret = tgu_write_all_hw_regs(drvdata); + if (!ret) + drvdata->enabled = true; - return 0; + return ret; } static void tgu_do_disable(struct tgu_drvdata *drvdata) @@ -262,6 +358,14 @@ static const struct attribute_group *tgu_attr_groups[] = { PRIORITY_ATTRIBUTE_GROUP_INIT(7, 1), PRIORITY_ATTRIBUTE_GROUP_INIT(7, 2), PRIORITY_ATTRIBUTE_GROUP_INIT(7, 3), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(0), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(1), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(2), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(3), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(4), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(5), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(6), + CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(7), NULL, }; @@ -269,8 +373,8 @@ 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; - size_t priority_size; + unsigned int *priority, *condition; + size_t priority_size, condition_size; int ret; drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); @@ -288,6 +392,7 @@ 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); ret = sysfs_create_groups(&dev->kobj, tgu_attr_groups); if (ret) { @@ -310,6 +415,16 @@ static int tgu_probe(struct amba_device *adev, const struct amba_id *id) drvdata->value_table->priority = priority; + condition_size = drvdata->num_condition_decode * drvdata->num_step; + + condition = devm_kcalloc(dev, condition_size, + sizeof(*(drvdata->value_table->condition_decode)), + GFP_KERNEL); + if (!condition) + return -ENOMEM; + + drvdata->value_table->condition_decode = condition; + drvdata->enabled = false; pm_runtime_put(&adev->dev); diff --git a/drivers/hwtracing/qcom/tgu.h b/drivers/hwtracing/qcom/tgu.h index f994d83acb1d..56e4161a8bc2 100644 --- a/drivers/hwtracing/qcom/tgu.h +++ b/drivers/hwtracing/qcom/tgu.h @@ -16,6 +16,8 @@ ((int)FIELD_GET(GENMASK(17, 10), devid_val)) #define TGU_DEVID_STEPS(devid_val) \ ((int)FIELD_GET(GENMASK(6, 3), devid_val)) +#define TGU_DEVID_CONDITIONS(devid_val) \ + ((int)FIELD_GET(GENMASK(2, 0), devid_val)) #define TGU_BITS_PER_SIGNAL 4 #define LENGTH_REGISTER 32 @@ -49,6 +51,7 @@ */ #define STEP_OFFSET 0x1D8 #define PRIORITY_START_OFFSET 0x0074 +#define CONDITION_DECODE_OFFSET 0x0050 #define PRIORITY_OFFSET 0x60 #define REG_OFFSET 0x4 @@ -57,6 +60,9 @@ (PRIORITY_START_OFFSET + PRIORITY_OFFSET * priority +\ REG_OFFSET * reg + STEP_OFFSET * step) +#define CONDITION_DECODE_STEP(step, decode) \ + (CONDITION_DECODE_OFFSET + REG_OFFSET * decode + 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), \ @@ -68,6 +74,8 @@ #define STEP_PRIORITY(step_index, reg_num, priority) \ tgu_dataset_rw(reg##reg_num, step_index, TGU_PRIORITY##priority, \ reg_num) +#define STEP_DECODE(step_index, reg_num) \ + tgu_dataset_rw(reg##reg_num, step_index, TGU_CONDITION_DECODE, reg_num) #define STEP_PRIORITY_LIST(step_index, priority) \ {STEP_PRIORITY(step_index, 0, priority), \ @@ -91,6 +99,14 @@ NULL \ } +#define STEP_DECODE_LIST(n) \ + {STEP_DECODE(n, 0), \ + STEP_DECODE(n, 1), \ + STEP_DECODE(n, 2), \ + STEP_DECODE(n, 3), \ + NULL \ + } + #define PRIORITY_ATTRIBUTE_GROUP_INIT(step, priority)\ (&(const struct attribute_group){\ .attrs = (struct attribute*[])STEP_PRIORITY_LIST(step, priority),\ @@ -98,11 +114,19 @@ .name = "step" #step "_priority" #priority \ }) +#define CONDITION_DECODE_ATTRIBUTE_GROUP_INIT(step)\ + (&(const struct attribute_group){\ + .attrs = (struct attribute*[])STEP_DECODE_LIST(step),\ + .is_visible = tgu_node_visible,\ + .name = "step" #step "_condition_decode" \ + }) + enum operation_index { TGU_PRIORITY0, TGU_PRIORITY1, TGU_PRIORITY2, TGU_PRIORITY3, + TGU_CONDITION_DECODE, }; /* Maximum priority that TGU supports */ @@ -117,6 +141,7 @@ struct tgu_attribute { struct value_table { unsigned int *priority; + unsigned int *condition_decode; }; static inline void TGU_LOCK(void __iomem *addr) @@ -146,6 +171,7 @@ static inline void TGU_UNLOCK(void __iomem *addr) * @value_table: Store given value based on relevant parameters * @num_reg: Maximum number of registers * @num_step: Maximum step size + * @num_condition_decode: Maximum number of condition_decode * * This structure defines the data associated with a TGU device, * including its base address, device pointers, clock, spinlock for @@ -160,6 +186,7 @@ struct tgu_drvdata { struct value_table *value_table; int num_reg; int num_step; + int num_condition_decode; }; #endif -- 2.34.1