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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. Signed-off-by: Songwei Chai --- .../ABI/testing/sysfs-bus-coresight-devices-tgu | 7 + drivers/hwtracing/coresight/coresight-tgu.c | 186 ++++++++++++++++++--- drivers/hwtracing/coresight/coresight-tgu.h | 29 +++- 3 files changed, 196 insertions(+), 26 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu index 58434097688388ab5d755030c52acca75f04cfb6..50967ca039d88d7aa16e3d9c92aec32fef2b3498 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu @@ -14,3 +14,10 @@ KernelVersion 6.15 Contact: Jinlong Mao (QUIC) , Sam Chai (QUIC) Description: (RW) Set/Get the sensed signal with specific step and priority for TGU. + +What: /sys/bus/coresight/devices//step[0:7]_condition_decode/reg[0:3] +Date: February 2025 +KernelVersion 6.15 +Contact: Jinlong Mao (QUIC) , Sam Chai (QUIC) +Description: + (RW) Set/Get the decode mode with specific step for TGU. \ No newline at end of file diff --git a/drivers/hwtracing/coresight/coresight-tgu.c b/drivers/hwtracing/coresight/coresight-tgu.c index 6dbfd4c604b1fe6335e0cdff69521a08325c1f4d..8dbe8ab30174d97d754dcac23e2666c2cbfe4a48 100644 --- a/drivers/hwtracing/coresight/coresight-tgu.c +++ b/drivers/hwtracing/coresight/coresight-tgu.c @@ -21,13 +21,35 @@ static int calculate_array_location(struct tgu_drvdata *drvdata, int step_index, int operation_index, int reg_index) { - int ret; + int ret = -EINVAL; + + switch (operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + ret = operation_index * (drvdata->max_step) * + (drvdata->max_reg) + + step_index * (drvdata->max_reg) + reg_index; + break; + case TGU_CONDITION_DECODE: + ret = step_index * (drvdata->max_condition_decode) + + reg_index; + break; + default: + break; + } + return ret; +} - ret = operation_index * (drvdata->max_step) * - (drvdata->max_reg) + - step_index * (drvdata->max_reg) + reg_index; +static int check_array_location(struct tgu_drvdata *drvdata, int step, + int ops, int reg) +{ + int result = calculate_array_location(drvdata, step, ops, reg); - return ret; + if (result == -EINVAL) + dev_err(&drvdata->csdev->dev, "%s - Fail\n", __func__); + return result; } static ssize_t tgu_dataset_show(struct device *dev, @@ -36,13 +58,33 @@ static ssize_t tgu_dataset_show(struct device *dev, struct tgu_drvdata *drvdata = dev_get_drvdata(dev->parent); struct tgu_attribute *tgu_attr = container_of(attr, struct tgu_attribute, attr); + int ret = 0; + + ret = check_array_location(drvdata, tgu_attr->step_index, + tgu_attr->operation_index, tgu_attr->reg_num); + if (ret == -EINVAL) + return ret; - return sysfs_emit(buf, "0x%x\n", - drvdata->value_table->priority[ - calculate_array_location( - drvdata, tgu_attr->step_index, - tgu_attr->operation_index, - tgu_attr->reg_num)]); + 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[calculate_array_location( + drvdata, tgu_attr->step_index, + tgu_attr->operation_index, + tgu_attr->reg_num)]); + case TGU_CONDITION_DECODE: + return sysfs_emit(buf, "0x%x\n", + drvdata->value_table->condition_decode[calculate_array_location( + drvdata, tgu_attr->step_index, + tgu_attr->operation_index, + tgu_attr->reg_num)]); + default: + break; + } + return -EINVAL; } static ssize_t tgu_dataset_store(struct device *dev, @@ -51,20 +93,44 @@ static ssize_t tgu_dataset_store(struct device *dev, size_t size) { unsigned long val; + int ret = -EINVAL; struct tgu_drvdata *tgu_drvdata = dev_get_drvdata(dev->parent); struct tgu_attribute *tgu_attr = container_of(attr, struct tgu_attribute, attr); if (kstrtoul(buf, 0, &val)) - return -EINVAL; + return ret; - guard(spinlock)(&tgu_drvdata->spinlock); - tgu_drvdata->value_table->priority[calculate_array_location( - tgu_drvdata, tgu_attr->step_index, tgu_attr->operation_index, - tgu_attr->reg_num)] = val; + ret = check_array_location(tgu_drvdata, tgu_attr->step_index, + tgu_attr->operation_index, tgu_attr->reg_num); - return size; + if (ret == -EINVAL) + return ret; + + guard(spinlock)(&tgu_drvdata->spinlock); + switch (tgu_attr->operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + tgu_drvdata->value_table->priority[calculate_array_location( + tgu_drvdata, tgu_attr->step_index, + tgu_attr->operation_index, + tgu_attr->reg_num)] = val; + ret = size; + break; + case TGU_CONDITION_DECODE: + tgu_drvdata->value_table->condition_decode[calculate_array_location( + tgu_drvdata, tgu_attr->step_index, + tgu_attr->operation_index, + tgu_attr->reg_num)] = val; + ret = size; + break; + default: + break; + } + return ret; } static umode_t tgu_node_visible(struct kobject *kobject, @@ -81,34 +147,70 @@ static umode_t tgu_node_visible(struct kobject *kobject, container_of(dev_attr, struct tgu_attribute, attr); if (tgu_attr->step_index < drvdata->max_step) { - ret = (tgu_attr->reg_num < drvdata->max_reg) ? - attr->mode : - 0; + switch (tgu_attr->operation_index) { + case TGU_PRIORITY0: + case TGU_PRIORITY1: + case TGU_PRIORITY2: + case TGU_PRIORITY3: + ret = (tgu_attr->reg_num < drvdata->max_reg) ? + attr->mode : + 0; + break; + case TGU_CONDITION_DECODE: + ret = (tgu_attr->reg_num < + drvdata->max_condition_decode) ? + attr->mode : + 0; + break; + default: + break; + } } return ret; } -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; + int i, j, k, ret; CS_UNLOCK(drvdata->base); for (i = 0; i < drvdata->max_step; i++) { for (j = 0; j < MAX_PRIORITY; j++) { for (k = 0; k < drvdata->max_reg; k++) { + + ret = check_array_location(drvdata, i, j, k); + if (ret == -EINVAL) + goto exit; + tgu_writel(drvdata, drvdata->value_table->priority [calculate_array_location( - drvdata, i, j, k)], + drvdata, i, j, k)], PRIORITY_REG_STEP(i, j, k)); } } } + for (i = 0; i < drvdata->max_step; i++) { + for (j = 0; j < drvdata->max_condition_decode; j++) { + ret = check_array_location(drvdata, i, TGU_CONDITION_DECODE, j); + if (ret == -EINVAL) + goto exit; + + tgu_writel(drvdata, + drvdata->value_table->condition_decode + [calculate_array_location( + drvdata, i, + TGU_CONDITION_DECODE, j)], + CONDITION_DECODE_STEP(i, j)); + } + } /* Enable TGU to program the triggers */ tgu_writel(drvdata, 1, TGU_CONTROL); +exit: CS_LOCK(drvdata->base); + return ret >= 0 ? 0 : ret; } static void tgu_set_reg_number(struct tgu_drvdata *drvdata) @@ -139,9 +241,21 @@ static void tgu_set_steps(struct tgu_drvdata *drvdata) drvdata->max_step = num_steps; } +static void tgu_set_conditions(struct tgu_drvdata *drvdata) +{ + int num_conditions; + u32 devid; + + devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID); + + num_conditions = TGU_DEVID_CONDITIONS(devid); + drvdata->max_condition_decode = num_conditions; +} + static int tgu_enable(struct coresight_device *csdev, enum cs_mode mode, void *data) { + int ret = 0; struct tgu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); spin_lock(&drvdata->spinlock); @@ -150,11 +264,15 @@ static int tgu_enable(struct coresight_device *csdev, enum cs_mode mode, spin_unlock(&drvdata->spinlock); return -EBUSY; } - tgu_write_all_hw_regs(drvdata); + ret = tgu_write_all_hw_regs(drvdata); + + if (ret == -EINVAL) + goto exit; drvdata->enable = true; +exit: spin_unlock(&drvdata->spinlock); - return 0; + return ret; } static int tgu_disable(struct coresight_device *csdev, void *data) @@ -271,6 +389,14 @@ 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, }; @@ -307,6 +433,7 @@ 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); drvdata->value_table = devm_kzalloc(dev, sizeof(*drvdata->value_table), GFP_KERNEL); @@ -322,6 +449,15 @@ static int tgu_probe(struct amba_device *adev, const struct amba_id *id) if (!drvdata->value_table->priority) return -ENOMEM; + drvdata->value_table->condition_decode = devm_kzalloc( + dev, + drvdata->max_condition_decode * drvdata->max_step * + sizeof(*(drvdata->value_table->condition_decode)), + GFP_KERNEL); + + if (!drvdata->value_table->condition_decode) + return -ENOMEM; + drvdata->enable = false; desc.type = CORESIGHT_DEV_TYPE_HELPER; desc.pdata = adev->dev.platform_data; diff --git a/drivers/hwtracing/coresight/coresight-tgu.h b/drivers/hwtracing/coresight/coresight-tgu.h index f07ead50536581578bcae7248d913207db6ac8ea..691da393ffa30fe7501ba0e8c4a058d8d561fc14 100644 --- a/drivers/hwtracing/coresight/coresight-tgu.h +++ b/drivers/hwtracing/coresight/coresight-tgu.h @@ -15,6 +15,7 @@ #define TGU_DEVID_SENSE_INPUT(devid_val) ((int) BMVAL(devid_val, 10, 17)) #define TGU_DEVID_STEPS(devid_val) ((int)BMVAL(devid_val, 3, 6)) +#define TGU_DEVID_CONDITIONS(devid_val) ((int)BMVAL(devid_val, 0, 2)) #define NUMBER_BITS_EACH_SIGNAL 4 #define LENGTH_REGISTER 32 @@ -48,6 +49,7 @@ */ #define STEP_OFFSET 0x1D8 #define PRIORITY_START_OFFSET 0x0074 +#define CONDITION_DECODE_OFFSET 0x0050 #define PRIORITY_OFFSET 0x60 #define REG_OFFSET 0x4 @@ -56,6 +58,9 @@ (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 +73,9 @@ 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), \ STEP_PRIORITY(step_index, 1, priority), \ @@ -90,6 +98,14 @@ 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),\ @@ -97,11 +113,19 @@ .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_PRIORITY3, + TGU_CONDITION_DECODE }; @@ -117,6 +141,7 @@ struct tgu_attribute { struct value_table { unsigned int *priority; + unsigned int *condition_decode; }; /** @@ -129,6 +154,7 @@ struct value_table { * @value_table: Store given value based on relevant parameters. * @max_reg: Maximum number of registers * @max_step: Maximum step size + * @max_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 @@ -144,6 +170,7 @@ struct tgu_drvdata { struct value_table *value_table; int max_reg; int max_step; + int max_condition_decode; }; #endif -- 2.34.1