[PATCH v13 12/14] coresight: etm3x: introduce struct etm_caps

Introduce struct etm_caps to describe ETMv3 capabilities and move capabilities information into it.

Since drvdata->etmccr and drvdata->etmccer are used to check whether it supports fifofull logic and timestamping, remove etmccr and etmccer field from drvdata and add relevant fields in etm_caps structure.

Reviewed-by: Mike Leach mike.leach@arm.com Tested-by: Leo Yan leo.yan@arm.com Signed-off-by: Yeoreum Yun yeoreum.yun@arm.com --- drivers/hwtracing/coresight/coresight-etm.h | 42 +++++++++++++--------- drivers/hwtracing/coresight/coresight-etm3x-core.c | 42 +++++++++++++--------- .../hwtracing/coresight/coresight-etm3x-sysfs.c | 24 ++++++++----- 3 files changed, 66 insertions(+), 42 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm.h b/drivers/hwtracing/coresight/coresight-etm.h index 52f23a3c7364..560a58a3817c 100644 --- a/drivers/hwtracing/coresight/coresight-etm.h +++ b/drivers/hwtracing/coresight/coresight-etm.h @@ -140,6 +140,30 @@ ETM_ADD_COMP_0 | \ ETM_EVENT_NOT_A)

+/** + * struct etm_caps - specifics ETM capabilities + * @port_size: port size as reported by ETMCR bit 4-6 and 21. + * @nr_addr_cmp:Number of pairs of address comparators as found in ETMCCR. + * @nr_cntr: Number of counters as found in ETMCCR bit 13-15. + * @nr_ext_inp: Number of external input as found in ETMCCR bit 17-19. + * @nr_ext_out: Number of external output as found in ETMCCR bit 20-22. + * @nr_ctxid_cmp: Number of contextID comparators as found in ETMCCR bit 24-25. + * @fifofull: FIFOFULL logic is present. + * @timestamp: Timestamping is implemented. + * @retstack: Return stack is implemented. + */ +struct etm_caps { + int port_size; + u8 nr_addr_cmp; + u8 nr_cntr; + u8 nr_ext_inp; + u8 nr_ext_out; + u8 nr_ctxid_cmp; + bool fifofull : 1; + bool timestamp : 1; + bool retstack : 1; +}; + /** * struct etm_config - configuration information related to an ETM * @mode: controls various modes supported by this ETM/PTM. @@ -212,19 +236,12 @@ struct etm_config { * @csdev: component vitals needed by the framework. * @spinlock: only one at a time pls. * @cpu: the cpu this component is affined to. - * @port_size: port size as reported by ETMCR bit 4-6 and 21. * @arch: ETM/PTM version number. + * @caps: ETM capabilities. * @use_cpu14: true if management registers need to be accessed via CP14. * @sticky_enable: true if ETM base configuration has been done. * @boot_enable:true if we should start tracing at boot time. * @os_unlock: true if access to management registers is allowed. - * @nr_addr_cmp:Number of pairs of address comparators as found in ETMCCR. - * @nr_cntr: Number of counters as found in ETMCCR bit 13-15. - * @nr_ext_inp: Number of external input as found in ETMCCR bit 17-19. - * @nr_ext_out: Number of external output as found in ETMCCR bit 20-22. - * @nr_ctxid_cmp: Number of contextID comparators as found in ETMCCR bit 24-25. - * @etmccr: value of register ETMCCR. - * @etmccer: value of register ETMCCER. * @traceid: value of the current ID for this component. * @curr_config: structure holding current running configuration. * @config: structure holding sysfs mode configuration. @@ -235,19 +252,12 @@ struct etm_drvdata { struct coresight_device *csdev; spinlock_t spinlock; int cpu; - int port_size; u8 arch; + struct etm_caps caps; bool use_cp14; bool sticky_enable; bool boot_enable; bool os_unlock; - u8 nr_addr_cmp; - u8 nr_cntr; - u8 nr_ext_inp; - u8 nr_ext_out; - u8 nr_ctxid_cmp; - u32 etmccr; - u32 etmccer; u32 traceid; struct etm_config curr_config; struct etm_config config; diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c index ac7c154720cb..ca2ba179b6fb 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c @@ -308,6 +308,7 @@ void etm_config_trace_mode(struct etm_config *config) static int etm_parse_event_config(struct etm_drvdata *drvdata, struct perf_event *event) { + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->curr_config; struct perf_event_attr *attr = &event->attr; u8 ts_level; @@ -356,8 +357,7 @@ static int etm_parse_event_config(struct etm_drvdata *drvdata, * has ret stack) on the same SoC. So only enable when it can be honored * - trace will still continue normally otherwise. */ - if (ATTR_CFG_GET_FLD(attr, retstack) && - (drvdata->etmccer & ETMCCER_RETSTACK)) + if (ATTR_CFG_GET_FLD(attr, retstack) && (caps->retstack)) config->ctrl |= ETMCR_RETURN_STACK;

return 0; @@ -367,6 +367,7 @@ static int etm_enable_hw(struct etm_drvdata *drvdata) { int i, rc; u32 etmcr; + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->curr_config; struct coresight_device *csdev = drvdata->csdev;

@@ -388,7 +389,7 @@ static int etm_enable_hw(struct etm_drvdata *drvdata) etmcr = etm_readl(drvdata, ETMCR); /* Clear setting from a previous run if need be */ etmcr &= ~ETM3X_SUPPORTED_OPTIONS; - etmcr |= drvdata->port_size; + etmcr |= caps->port_size; etmcr |= ETMCR_ETM_EN; etm_writel(drvdata, config->ctrl | etmcr, ETMCR); etm_writel(drvdata, config->trigger_event, ETMTRIGGER); @@ -396,11 +397,11 @@ static int etm_enable_hw(struct etm_drvdata *drvdata) etm_writel(drvdata, config->enable_event, ETMTEEVR); etm_writel(drvdata, config->enable_ctrl1, ETMTECR1); etm_writel(drvdata, config->fifofull_level, ETMFFLR); - for (i = 0; i < drvdata->nr_addr_cmp; i++) { + for (i = 0; i < caps->nr_addr_cmp; i++) { etm_writel(drvdata, config->addr_val[i], ETMACVRn(i)); etm_writel(drvdata, config->addr_acctype[i], ETMACTRn(i)); } - for (i = 0; i < drvdata->nr_cntr; i++) { + for (i = 0; i < caps->nr_cntr; i++) { etm_writel(drvdata, config->cntr_rld_val[i], ETMCNTRLDVRn(i)); etm_writel(drvdata, config->cntr_event[i], ETMCNTENRn(i)); etm_writel(drvdata, config->cntr_rld_event[i], @@ -414,9 +415,9 @@ static int etm_enable_hw(struct etm_drvdata *drvdata) etm_writel(drvdata, config->seq_32_event, ETMSQ32EVR); etm_writel(drvdata, config->seq_13_event, ETMSQ13EVR); etm_writel(drvdata, config->seq_curr_state, ETMSQR); - for (i = 0; i < drvdata->nr_ext_out; i++) + for (i = 0; i < caps->nr_ext_out; i++) etm_writel(drvdata, ETM_DEFAULT_EVENT_VAL, ETMEXTOUTEVRn(i)); - for (i = 0; i < drvdata->nr_ctxid_cmp; i++) + for (i = 0; i < caps->nr_ctxid_cmp; i++) etm_writel(drvdata, config->ctxid_pid[i], ETMCIDCVRn(i)); etm_writel(drvdata, config->ctxid_mask, ETMCIDCMR); etm_writel(drvdata, config->sync_freq, ETMSYNCFR); @@ -560,6 +561,7 @@ static int etm_enable(struct coresight_device *csdev, struct perf_event *event, static void etm_disable_hw(struct etm_drvdata *drvdata) { int i; + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->curr_config; struct coresight_device *csdev = drvdata->csdev;

@@ -569,7 +571,7 @@ static void etm_disable_hw(struct etm_drvdata *drvdata) /* Read back sequencer and counters for post trace analysis */ config->seq_curr_state = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);

- for (i = 0; i < drvdata->nr_cntr; i++) + for (i = 0; i < caps->nr_cntr; i++) config->cntr_val[i] = etm_readl(drvdata, ETMCNTVRn(i));

etm_set_pwrdwn(drvdata); @@ -624,6 +626,7 @@ static void etm_disable_perf(struct coresight_device *csdev) static void etm_disable_sysfs(struct coresight_device *csdev) { struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->config; const struct etm_config *curr_config = &drvdata->curr_config; int i; @@ -639,7 +642,7 @@ static void etm_disable_sysfs(struct coresight_device *csdev) * Userspace may read seq_curr_state and cntr_val through sysfs * after the sysfs-session has been disabled. */ - for (i = 0; i < drvdata->nr_cntr; i++) + for (i = 0; i < caps->nr_cntr; i++) config->cntr_val[i] = curr_config->cntr_val[i];

config->seq_curr_state = curr_config->seq_curr_state; @@ -724,7 +727,9 @@ static void etm_init_arch_data(void *info) { u32 etmidr; u32 etmccr; + u32 etmccer; struct etm_drvdata *drvdata = info; + struct etm_caps *caps = &drvdata->caps;

/* Make sure all registers are accessible */ etm_os_unlock(drvdata); @@ -749,16 +754,19 @@ static void etm_init_arch_data(void *info) /* Find all capabilities */ etmidr = etm_readl(drvdata, ETMIDR); drvdata->arch = BMVAL(etmidr, 4, 11); - drvdata->port_size = etm_readl(drvdata, ETMCR) & PORT_SIZE_MASK; + caps->port_size = etm_readl(drvdata, ETMCR) & PORT_SIZE_MASK; + + etmccer = etm_readl(drvdata, ETMCCER); + caps->timestamp = !!(etmccer & ETMCCER_TIMESTAMP); + caps->retstack = !!(etmccer & ETMCCER_RETSTACK);

- drvdata->etmccer = etm_readl(drvdata, ETMCCER); etmccr = etm_readl(drvdata, ETMCCR); - drvdata->etmccr = etmccr; - drvdata->nr_addr_cmp = BMVAL(etmccr, 0, 3) * 2; - drvdata->nr_cntr = BMVAL(etmccr, 13, 15); - drvdata->nr_ext_inp = BMVAL(etmccr, 17, 19); - drvdata->nr_ext_out = BMVAL(etmccr, 20, 22); - drvdata->nr_ctxid_cmp = BMVAL(etmccr, 24, 25); + caps->fifofull = !!(etmccr & ETMCCR_FIFOFULL); + caps->nr_addr_cmp = BMVAL(etmccr, 0, 3) * 2; + caps->nr_cntr = BMVAL(etmccr, 13, 15); + caps->nr_ext_inp = BMVAL(etmccr, 17, 19); + caps->nr_ext_out = BMVAL(etmccr, 20, 22); + caps->nr_ctxid_cmp = BMVAL(etmccr, 24, 25);

coresight_clear_self_claim_tag_unlocked(&drvdata->csa); etm_set_pwrdwn(drvdata); diff --git a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c index 284998f18017..c27865d719eb 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c @@ -53,8 +53,9 @@ static ssize_t nr_addr_cmp_show(struct device *dev, { unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps;

- val = drvdata->nr_addr_cmp; + val = caps->nr_addr_cmp; return sprintf(buf, "%#lx\n", val); } static DEVICE_ATTR_RO(nr_addr_cmp); @@ -63,8 +64,9 @@ static ssize_t nr_cntr_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps;

- val = drvdata->nr_cntr; + val = caps->nr_cntr; return sprintf(buf, "%#lx\n", val); } static DEVICE_ATTR_RO(nr_cntr); @@ -75,7 +77,7 @@ static ssize_t nr_ctxid_cmp_show(struct device *dev, unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

- val = drvdata->nr_ctxid_cmp; + val = drvdata->caps.nr_ctxid_cmp; return sprintf(buf, "%#lx\n", val); } static DEVICE_ATTR_RO(nr_ctxid_cmp); @@ -117,7 +119,7 @@ static ssize_t reset_store(struct device *dev, memset(config, 0, sizeof(struct etm_config)); config->mode = ETM_MODE_EXCLUDE; config->trigger_event = ETM_DEFAULT_EVENT_VAL; - for (i = 0; i < drvdata->nr_addr_cmp; i++) { + for (i = 0; i < drvdata->caps.nr_addr_cmp; i++) { config->addr_type[i] = ETM_ADDR_TYPE_NONE; }

@@ -148,6 +150,7 @@ static ssize_t mode_store(struct device *dev, int ret; unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->config;

ret = kstrtoul(buf, 16, &val); @@ -168,7 +171,7 @@ static ssize_t mode_store(struct device *dev, config->ctrl &= ~ETMCR_CYC_ACC;

if (config->mode & ETM_MODE_STALL) { - if (!(drvdata->etmccr & ETMCCR_FIFOFULL)) { + if (!caps->fifofull) { dev_warn(dev, "stall mode not supported\n"); ret = -EINVAL; goto err_unlock; @@ -178,7 +181,7 @@ static ssize_t mode_store(struct device *dev, config->ctrl &= ~ETMCR_STALL_MODE;

if (config->mode & ETM_MODE_TIMESTAMP) { - if (!(drvdata->etmccer & ETMCCER_TIMESTAMP)) { + if (!caps->timestamp) { dev_warn(dev, "timestamp not supported\n"); ret = -EINVAL; goto err_unlock; @@ -323,13 +326,14 @@ static ssize_t addr_idx_store(struct device *dev, int ret; unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->config;

ret = kstrtoul(buf, 16, &val); if (ret) return ret;

- if (val >= drvdata->nr_addr_cmp) + if (val >= caps->nr_addr_cmp) return -EINVAL;

/* @@ -626,13 +630,14 @@ static ssize_t cntr_idx_store(struct device *dev, int ret; unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->config;

ret = kstrtoul(buf, 16, &val); if (ret) return ret;

- if (val >= drvdata->nr_cntr) + if (val >= caps->nr_cntr) return -EINVAL; /* * Use spinlock to ensure index doesn't change while it gets @@ -1033,13 +1038,14 @@ static ssize_t ctxid_idx_store(struct device *dev, int ret; unsigned long val; struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); + const struct etm_caps *caps = &drvdata->caps; struct etm_config *config = &drvdata->config;

ret = kstrtoul(buf, 16, &val); if (ret) return ret;

- if (val >= drvdata->nr_ctxid_cmp) + if (val >= caps->nr_ctxid_cmp) return -EINVAL;

/*