diff options
Diffstat (limited to 'drivers/hwtracing/coresight')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-core.c | 3 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-dummy.c | 5 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm-perf.c | 2 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-core.c | 52 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-funnel.c | 5 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-replicator.c | 5 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-core.c | 15 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etr.c | 111 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.h | 3 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tpda.c | 126 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tpda.h | 2 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tpdm.c | 718 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tpdm.h | 161 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-trbe.c | 28 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-trbe.h | 2 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/ultrasoc-smb.c | 76 |
16 files changed, 1206 insertions, 108 deletions
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 4b80026db1..965bb6d4e1 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1109,6 +1109,7 @@ static int coresight_validate_source(struct coresight_device *csdev, if (subtype != CORESIGHT_DEV_SUBTYPE_SOURCE_PROC && subtype != CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE && + subtype != CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM && subtype != CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS) { dev_err(&csdev->dev, "wrong device subtype in %s\n", function); return -EINVAL; @@ -1178,6 +1179,7 @@ int coresight_enable(struct coresight_device *csdev) per_cpu(tracer_path, cpu) = path; break; case CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE: + case CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM: case CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS: /* * Use the hash of source's device name as ID @@ -1228,6 +1230,7 @@ void coresight_disable(struct coresight_device *csdev) per_cpu(tracer_path, cpu) = NULL; break; case CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE: + case CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM: case CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS: hash = hashlen_hash(hashlen_string(NULL, dev_name(&csdev->dev))); /* Find the path by the hash. */ diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c index e4deafae7b..ac70c0b491 100644 --- a/drivers/hwtracing/coresight/coresight-dummy.c +++ b/drivers/hwtracing/coresight/coresight-dummy.c @@ -122,14 +122,13 @@ static int dummy_probe(struct platform_device *pdev) return 0; } -static int dummy_remove(struct platform_device *pdev) +static void dummy_remove(struct platform_device *pdev) { struct dummy_drvdata *drvdata = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; pm_runtime_disable(dev); coresight_unregister(drvdata->csdev); - return 0; } static const struct of_device_id dummy_match[] = { @@ -140,7 +139,7 @@ static const struct of_device_id dummy_match[] = { static struct platform_driver dummy_driver = { .probe = dummy_probe, - .remove = dummy_remove, + .remove_new = dummy_remove, .driver = { .name = "coresight-dummy", .of_match_table = dummy_match, diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 58b32b399f..c0c60e6a17 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -68,6 +68,7 @@ PMU_FORMAT_ATTR(preset, "config:0-3"); PMU_FORMAT_ATTR(sinkid, "config2:0-31"); /* config ID - set if a system configuration is selected */ PMU_FORMAT_ATTR(configid, "config2:32-63"); +PMU_FORMAT_ATTR(cc_threshold, "config3:0-11"); /* @@ -101,6 +102,7 @@ static struct attribute *etm_config_formats_attr[] = { &format_attr_preset.attr, &format_attr_configid.attr, &format_attr_branch_broadcast.attr, + &format_attr_cc_threshold.attr, NULL, }; diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 18c4544f60..2e2cabc5f5 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -644,7 +644,7 @@ static int etm4_parse_event_config(struct coresight_device *csdev, struct etmv4_config *config = &drvdata->config; struct perf_event_attr *attr = &event->attr; unsigned long cfg_hash; - int preset; + int preset, cc_threshold; /* Clear configuration from previous run */ memset(config, 0, sizeof(struct etmv4_config)); @@ -667,7 +667,12 @@ static int etm4_parse_event_config(struct coresight_device *csdev, if (attr->config & BIT(ETM_OPT_CYCACC)) { config->cfg |= TRCCONFIGR_CCI; /* TRM: Must program this for cycacc to work */ - config->ccctlr = ETM_CYC_THRESHOLD_DEFAULT; + cc_threshold = attr->config3 & ETM_CYC_THRESHOLD_MASK; + if (!cc_threshold) + cc_threshold = ETM_CYC_THRESHOLD_DEFAULT; + if (cc_threshold < drvdata->ccitmin) + cc_threshold = drvdata->ccitmin; + config->ccctlr = cc_threshold; } if (attr->config & BIT(ETM_OPT_TS)) { /* @@ -1150,6 +1155,41 @@ static void cpu_detect_trace_filtering(struct etmv4_drvdata *drvdata) drvdata->trfcr = trfcr; } +/* + * The following errata on applicable cpu ranges, affect the CCITMIN filed + * in TCRIDR3 register. Software read for the field returns 0x100 limiting + * the cycle threshold granularity, whereas the right value should have + * been 0x4, which is well supported in the hardware. + */ +static struct midr_range etm_wrong_ccitmin_cpus[] = { + /* Erratum #1490853 - Cortex-A76 */ + MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 4, 0), + /* Erratum #1490853 - Neoverse-N1 */ + MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 4, 0), + /* Erratum #1491015 - Cortex-A77 */ + MIDR_RANGE(MIDR_CORTEX_A77, 0, 0, 1, 0), + /* Erratum #1502854 - Cortex-X1 */ + MIDR_REV(MIDR_CORTEX_X1, 0, 0), + /* Erratum #1619801 - Neoverse-V1 */ + MIDR_REV(MIDR_NEOVERSE_V1, 0, 0), + {}, +}; + +static void etm4_fixup_wrong_ccitmin(struct etmv4_drvdata *drvdata) +{ + /* + * Erratum affected cpus will read 256 as the minimum + * instruction trace cycle counting threshold whereas + * the correct value should be 4 instead. Override the + * recorded value for 'drvdata->ccitmin' to workaround + * this problem. + */ + if (is_midr_in_range_list(read_cpuid_id(), etm_wrong_ccitmin_cpus)) { + if (drvdata->ccitmin == 256) + drvdata->ccitmin = 4; + } +} + static void etm4_init_arch_data(void *info) { u32 etmidr0; @@ -1219,6 +1259,8 @@ static void etm4_init_arch_data(void *info) etmidr3 = etm4x_relaxed_read32(csa, TRCIDR3); /* CCITMIN, bits[11:0] minimum threshold value that can be programmed */ drvdata->ccitmin = FIELD_GET(TRCIDR3_CCITMIN_MASK, etmidr3); + etm4_fixup_wrong_ccitmin(drvdata); + /* EXLEVEL_S, bits[19:16] Secure state instruction tracing */ drvdata->s_ex_level = FIELD_GET(TRCIDR3_EXLEVEL_S_MASK, etmidr3); drvdata->config.s_ex_level = drvdata->s_ex_level; @@ -2261,7 +2303,7 @@ static void etm4_remove_amba(struct amba_device *adev) etm4_remove_dev(drvdata); } -static int etm4_remove_platform_dev(struct platform_device *pdev) +static void etm4_remove_platform_dev(struct platform_device *pdev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(&pdev->dev); @@ -2271,8 +2313,6 @@ static int etm4_remove_platform_dev(struct platform_device *pdev) if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) clk_put(drvdata->pclk); - - return 0; } static const struct amba_id etm4_ids[] = { @@ -2358,7 +2398,7 @@ MODULE_DEVICE_TABLE(acpi, etm4x_acpi_ids); static struct platform_driver etm4_platform_driver = { .probe = etm4_probe_platform_dev, - .remove = etm4_remove_platform_dev, + .remove_new = etm4_remove_platform_dev, .driver = { .name = "coresight-etm4x", .of_match_table = etm4_sysreg_match, diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c index b8e150e45b..a5b1fc7877 100644 --- a/drivers/hwtracing/coresight/coresight-funnel.c +++ b/drivers/hwtracing/coresight/coresight-funnel.c @@ -335,11 +335,10 @@ static int static_funnel_probe(struct platform_device *pdev) return ret; } -static int static_funnel_remove(struct platform_device *pdev) +static void static_funnel_remove(struct platform_device *pdev) { funnel_remove(&pdev->dev); pm_runtime_disable(&pdev->dev); - return 0; } static const struct of_device_id static_funnel_match[] = { @@ -360,7 +359,7 @@ MODULE_DEVICE_TABLE(acpi, static_funnel_ids); static struct platform_driver static_funnel_driver = { .probe = static_funnel_probe, - .remove = static_funnel_remove, + .remove_new = static_funnel_remove, .driver = { .name = "coresight-static-funnel", /* THIS_MODULE is taken care of by platform_driver_register() */ diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index b6be730349..91d93060dd 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -320,11 +320,10 @@ static int static_replicator_probe(struct platform_device *pdev) return ret; } -static int static_replicator_remove(struct platform_device *pdev) +static void static_replicator_remove(struct platform_device *pdev) { replicator_remove(&pdev->dev); pm_runtime_disable(&pdev->dev); - return 0; } #ifdef CONFIG_PM @@ -373,7 +372,7 @@ MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids); static struct platform_driver static_replicator_driver = { .probe = static_replicator_probe, - .remove = static_replicator_remove, + .remove_new = static_replicator_remove, .driver = { .name = "coresight-static-replicator", /* THIS_MODULE is taken care of by platform_driver_register() */ diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c index c106d142e6..7ec5365e2b 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -10,6 +10,7 @@ #include <linux/device.h> #include <linux/idr.h> #include <linux/io.h> +#include <linux/iommu.h> #include <linux/err.h> #include <linux/fs.h> #include <linux/miscdevice.h> @@ -344,7 +345,14 @@ static const struct attribute_group coresight_tmc_mgmt_group = { .name = "mgmt", }; -static const struct attribute_group *coresight_tmc_groups[] = { +static const struct attribute_group *coresight_etf_groups[] = { + &coresight_tmc_group, + &coresight_tmc_mgmt_group, + NULL, +}; + +static const struct attribute_group *coresight_etr_groups[] = { + &coresight_etr_group, &coresight_tmc_group, &coresight_tmc_mgmt_group, NULL, @@ -465,6 +473,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) drvdata->memwidth = tmc_get_memwidth(devid); /* This device is not associated with a session */ drvdata->pid = -1; + drvdata->etr_mode = ETR_MODE_AUTO; if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { drvdata->size = tmc_etr_get_default_buffer_size(dev); @@ -474,16 +483,17 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) } desc.dev = dev; - desc.groups = coresight_tmc_groups; switch (drvdata->config_type) { case TMC_CONFIG_TYPE_ETB: + desc.groups = coresight_etf_groups; desc.type = CORESIGHT_DEV_TYPE_SINK; desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; desc.ops = &tmc_etb_cs_ops; dev_list = &etb_devs; break; case TMC_CONFIG_TYPE_ETR: + desc.groups = coresight_etr_groups; desc.type = CORESIGHT_DEV_TYPE_SINK; desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_SYSMEM; desc.ops = &tmc_etr_cs_ops; @@ -496,6 +506,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) dev_list = &etr_devs; break; case TMC_CONFIG_TYPE_ETF: + desc.groups = coresight_etf_groups; desc.type = CORESIGHT_DEV_TYPE_LINKSINK; desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO; diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index 8311e1028d..af02ba5d5f 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -26,6 +26,12 @@ struct etr_flat_buf { size_t size; }; +struct etr_buf_hw { + bool has_iommu; + bool has_etr_sg; + bool has_catu; +}; + /* * etr_perf_buffer - Perf buffer used for ETR * @drvdata - The ETR drvdaga this buffer has been allocated for. @@ -830,6 +836,22 @@ static inline int tmc_etr_mode_alloc_buf(int mode, } } +static void get_etr_buf_hw(struct device *dev, struct etr_buf_hw *buf_hw) +{ + struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); + + buf_hw->has_iommu = iommu_get_domain_for_dev(dev->parent); + buf_hw->has_etr_sg = tmc_etr_has_cap(drvdata, TMC_ETR_SG); + buf_hw->has_catu = !!tmc_etr_get_catu_device(drvdata); +} + +static bool etr_can_use_flat_mode(struct etr_buf_hw *buf_hw, ssize_t etr_buf_size) +{ + bool has_sg = buf_hw->has_catu || buf_hw->has_etr_sg; + + return !has_sg || buf_hw->has_iommu || etr_buf_size < SZ_1M; +} + /* * tmc_alloc_etr_buf: Allocate a buffer use by ETR. * @drvdata : ETR device details. @@ -843,23 +865,22 @@ static struct etr_buf *tmc_alloc_etr_buf(struct tmc_drvdata *drvdata, int node, void **pages) { int rc = -ENOMEM; - bool has_etr_sg, has_iommu; - bool has_sg, has_catu; struct etr_buf *etr_buf; + struct etr_buf_hw buf_hw; struct device *dev = &drvdata->csdev->dev; - has_etr_sg = tmc_etr_has_cap(drvdata, TMC_ETR_SG); - has_iommu = iommu_get_domain_for_dev(dev->parent); - has_catu = !!tmc_etr_get_catu_device(drvdata); - - has_sg = has_catu || has_etr_sg; - + get_etr_buf_hw(dev, &buf_hw); etr_buf = kzalloc(sizeof(*etr_buf), GFP_KERNEL); if (!etr_buf) return ERR_PTR(-ENOMEM); etr_buf->size = size; + /* If there is user directive for buffer mode, try that first */ + if (drvdata->etr_mode != ETR_MODE_AUTO) + rc = tmc_etr_mode_alloc_buf(drvdata->etr_mode, drvdata, + etr_buf, node, pages); + /* * If we have to use an existing list of pages, we cannot reliably * use a contiguous DMA memory (even if we have an IOMMU). Otherwise, @@ -872,14 +893,13 @@ static struct etr_buf *tmc_alloc_etr_buf(struct tmc_drvdata *drvdata, * Fallback to available mechanisms. * */ - if (!pages && - (!has_sg || has_iommu || size < SZ_1M)) + if (rc && !pages && etr_can_use_flat_mode(&buf_hw, size)) rc = tmc_etr_mode_alloc_buf(ETR_MODE_FLAT, drvdata, etr_buf, node, pages); - if (rc && has_etr_sg) + if (rc && buf_hw.has_etr_sg) rc = tmc_etr_mode_alloc_buf(ETR_MODE_ETR_SG, drvdata, etr_buf, node, pages); - if (rc && has_catu) + if (rc && buf_hw.has_catu) rc = tmc_etr_mode_alloc_buf(ETR_MODE_CATU, drvdata, etr_buf, node, pages); if (rc) { @@ -1804,3 +1824,70 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) return 0; } + +static const char *const buf_modes_str[] = { + [ETR_MODE_FLAT] = "flat", + [ETR_MODE_ETR_SG] = "tmc-sg", + [ETR_MODE_CATU] = "catu", + [ETR_MODE_AUTO] = "auto", +}; + +static ssize_t buf_modes_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etr_buf_hw buf_hw; + ssize_t size = 0; + + get_etr_buf_hw(dev, &buf_hw); + size += sysfs_emit(buf, "%s ", buf_modes_str[ETR_MODE_AUTO]); + size += sysfs_emit_at(buf, size, "%s ", buf_modes_str[ETR_MODE_FLAT]); + if (buf_hw.has_etr_sg) + size += sysfs_emit_at(buf, size, "%s ", buf_modes_str[ETR_MODE_ETR_SG]); + + if (buf_hw.has_catu) + size += sysfs_emit_at(buf, size, "%s ", buf_modes_str[ETR_MODE_CATU]); + + size += sysfs_emit_at(buf, size, "\n"); + return size; +} +static DEVICE_ATTR_RO(buf_modes_available); + +static ssize_t buf_mode_preferred_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%s\n", buf_modes_str[drvdata->etr_mode]); +} + +static ssize_t buf_mode_preferred_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etr_buf_hw buf_hw; + + get_etr_buf_hw(dev, &buf_hw); + if (sysfs_streq(buf, buf_modes_str[ETR_MODE_FLAT])) + drvdata->etr_mode = ETR_MODE_FLAT; + else if (sysfs_streq(buf, buf_modes_str[ETR_MODE_ETR_SG]) && buf_hw.has_etr_sg) + drvdata->etr_mode = ETR_MODE_ETR_SG; + else if (sysfs_streq(buf, buf_modes_str[ETR_MODE_CATU]) && buf_hw.has_catu) + drvdata->etr_mode = ETR_MODE_CATU; + else if (sysfs_streq(buf, buf_modes_str[ETR_MODE_AUTO])) + drvdata->etr_mode = ETR_MODE_AUTO; + else + return -EINVAL; + return size; +} +static DEVICE_ATTR_RW(buf_mode_preferred); + +static struct attribute *coresight_etr_attrs[] = { + &dev_attr_buf_modes_available.attr, + &dev_attr_buf_mode_preferred.attr, + NULL, +}; + +const struct attribute_group coresight_etr_group = { + .attrs = coresight_etr_attrs, +}; diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h index 0ee48c5ba7..8dcb426ac3 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -135,6 +135,7 @@ enum etr_mode { ETR_MODE_FLAT, /* Uses contiguous flat buffer */ ETR_MODE_ETR_SG, /* Uses in-built TMC ETR SG mechanism */ ETR_MODE_CATU, /* Use SG mechanism in CATU */ + ETR_MODE_AUTO, /* Use the default mechanism */ }; struct etr_buf_operations; @@ -207,6 +208,7 @@ struct tmc_drvdata { enum tmc_mem_intf_width memwidth; u32 trigger_cntr; u32 etr_caps; + enum etr_mode etr_mode; struct idr idr; struct mutex idr_mutex; struct etr_buf *sysfs_buf; @@ -334,5 +336,6 @@ void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu); void tmc_etr_remove_catu_ops(void); struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev, enum cs_mode mode, void *data); +extern const struct attribute_group coresight_etr_group; #endif diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c index 8d2b9d2923..5f82737c37 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -21,6 +21,80 @@ DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda"); +static bool coresight_device_is_tpdm(struct coresight_device *csdev) +{ + return (csdev->type == CORESIGHT_DEV_TYPE_SOURCE) && + (csdev->subtype.source_subtype == + CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM); +} + +/* + * Read the DSB element size from the TPDM device + * Returns + * The dsb element size read from the devicetree if available. + * 0 - Otherwise, with a warning once. + */ +static int tpdm_read_dsb_element_size(struct coresight_device *csdev) +{ + int rc = 0; + u8 size = 0; + + rc = fwnode_property_read_u8(dev_fwnode(csdev->dev.parent), + "qcom,dsb-element-size", &size); + if (rc) + dev_warn_once(&csdev->dev, + "Failed to read TPDM DSB Element size: %d\n", rc); + + return size; +} + +/* + * Search and read element data size from the TPDM node in + * the devicetree. Each input port of TPDA is connected to + * a TPDM. Different TPDM supports different types of dataset, + * and some may support more than one type of dataset. + * Parameter "inport" is used to pass in the input port number + * of TPDA, and it is set to -1 in the recursize call. + */ +static int tpda_get_element_size(struct coresight_device *csdev, + int inport) +{ + int dsb_size = -ENOENT; + int i, size; + struct coresight_device *in; + + for (i = 0; i < csdev->pdata->nr_inconns; i++) { + in = csdev->pdata->in_conns[i]->src_dev; + if (!in) + continue; + + /* Ignore the paths that do not match port */ + if (inport > 0 && + csdev->pdata->in_conns[i]->dest_port != inport) + continue; + + if (coresight_device_is_tpdm(in)) { + size = tpdm_read_dsb_element_size(in); + } else { + /* Recurse down the path */ + size = tpda_get_element_size(in, -1); + } + + if (size < 0) + return size; + + if (dsb_size < 0) { + /* Found a size, save it. */ + dsb_size = size; + } else { + /* Found duplicate TPDMs */ + return -EEXIST; + } + } + + return dsb_size; +} + /* Settings pre enabling port control register */ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata) { @@ -32,26 +106,55 @@ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata) writel_relaxed(val, drvdata->base + TPDA_CR); } -static void tpda_enable_port(struct tpda_drvdata *drvdata, int port) +static int tpda_enable_port(struct tpda_drvdata *drvdata, int port) { u32 val; + int size; val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port)); + /* + * Configure aggregator port n DSB data set element size + * Set the bit to 0 if the size is 32 + * Set the bit to 1 if the size is 64 + */ + size = tpda_get_element_size(drvdata->csdev, port); + switch (size) { + case 32: + val &= ~TPDA_Pn_CR_DSBSIZE; + break; + case 64: + val |= TPDA_Pn_CR_DSBSIZE; + break; + case 0: + return -EEXIST; + case -EEXIST: + dev_warn_once(&drvdata->csdev->dev, + "Detected multiple TPDMs on port %d", -EEXIST); + return -EEXIST; + default: + return -EINVAL; + } + /* Enable the port */ val |= TPDA_Pn_CR_ENA; writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port)); + + return 0; } -static void __tpda_enable(struct tpda_drvdata *drvdata, int port) +static int __tpda_enable(struct tpda_drvdata *drvdata, int port) { + int ret; + CS_UNLOCK(drvdata->base); if (!drvdata->csdev->enable) tpda_enable_pre_port(drvdata); - tpda_enable_port(drvdata, port); - + ret = tpda_enable_port(drvdata, port); CS_LOCK(drvdata->base); + + return ret; } static int tpda_enable(struct coresight_device *csdev, @@ -59,16 +162,19 @@ static int tpda_enable(struct coresight_device *csdev, struct coresight_connection *out) { struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + int ret = 0; spin_lock(&drvdata->spinlock); - if (atomic_read(&in->dest_refcnt) == 0) - __tpda_enable(drvdata, in->dest_port); + if (atomic_read(&in->dest_refcnt) == 0) { + ret = __tpda_enable(drvdata, in->dest_port); + if (!ret) { + atomic_inc(&in->dest_refcnt); + dev_dbg(drvdata->dev, "TPDA inport %d enabled.\n", in->dest_port); + } + } - atomic_inc(&in->dest_refcnt); spin_unlock(&drvdata->spinlock); - - dev_dbg(drvdata->dev, "TPDA inport %d enabled.\n", in->dest_port); - return 0; + return ret; } static void __tpda_disable(struct tpda_drvdata *drvdata, int port) diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h index 0399678df3..b3b38fd41b 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.h +++ b/drivers/hwtracing/coresight/coresight-tpda.h @@ -10,6 +10,8 @@ #define TPDA_Pn_CR(n) (0x004 + (n * 4)) /* Aggregator port enable bit */ #define TPDA_Pn_CR_ENA BIT(0) +/* Aggregator port DSB data set element size bit */ +#define TPDA_Pn_CR_DSBSIZE BIT(8) #define TPDA_MAX_INPORTS 32 diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index f4854af043..97654aa4b7 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -4,6 +4,7 @@ */ #include <linux/amba/bus.h> +#include <linux/bitfield.h> #include <linux/bitmap.h> #include <linux/coresight.h> #include <linux/coresight-pmu.h> @@ -20,23 +21,265 @@ DEFINE_CORESIGHT_DEVLIST(tpdm_devs, "tpdm"); -static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata) +/* Read dataset array member with the index number */ +static ssize_t tpdm_simple_dataset_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct tpdm_dataset_attribute *tpdm_attr = + container_of(attr, struct tpdm_dataset_attribute, attr); + + switch (tpdm_attr->mem) { + case DSB_EDGE_CTRL: + if (tpdm_attr->idx >= TPDM_DSB_MAX_EDCR) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->edge_ctrl[tpdm_attr->idx]); + case DSB_EDGE_CTRL_MASK: + if (tpdm_attr->idx >= TPDM_DSB_MAX_EDCMR) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->edge_ctrl_mask[tpdm_attr->idx]); + case DSB_TRIG_PATT: + if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->trig_patt[tpdm_attr->idx]); + case DSB_TRIG_PATT_MASK: + if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->trig_patt_mask[tpdm_attr->idx]); + case DSB_PATT: + if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->patt_val[tpdm_attr->idx]); + case DSB_PATT_MASK: + if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->patt_mask[tpdm_attr->idx]); + case DSB_MSR: + if (tpdm_attr->idx >= drvdata->dsb_msr_num) + return -EINVAL; + return sysfs_emit(buf, "0x%x\n", + drvdata->dsb->msr[tpdm_attr->idx]); + } + return -EINVAL; +} + +/* Write dataset array member with the index number */ +static ssize_t tpdm_simple_dataset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + unsigned long val; + ssize_t ret = size; + + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct tpdm_dataset_attribute *tpdm_attr = + container_of(attr, struct tpdm_dataset_attribute, attr); + + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + switch (tpdm_attr->mem) { + case DSB_TRIG_PATT: + if (tpdm_attr->idx < TPDM_DSB_MAX_PATT) + drvdata->dsb->trig_patt[tpdm_attr->idx] = val; + else + ret = -EINVAL; + break; + case DSB_TRIG_PATT_MASK: + if (tpdm_attr->idx < TPDM_DSB_MAX_PATT) + drvdata->dsb->trig_patt_mask[tpdm_attr->idx] = val; + else + ret = -EINVAL; + break; + case DSB_PATT: + if (tpdm_attr->idx < TPDM_DSB_MAX_PATT) + drvdata->dsb->patt_val[tpdm_attr->idx] = val; + else + ret = -EINVAL; + break; + case DSB_PATT_MASK: + if (tpdm_attr->idx < TPDM_DSB_MAX_PATT) + drvdata->dsb->patt_mask[tpdm_attr->idx] = val; + else + ret = -EINVAL; + break; + case DSB_MSR: + if (tpdm_attr->idx < drvdata->dsb_msr_num) + drvdata->dsb->msr[tpdm_attr->idx] = val; + else + ret = -EINVAL; + break; + default: + ret = -EINVAL; + } + spin_unlock(&drvdata->spinlock); + + return ret; +} + +static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata) +{ + return (drvdata->datasets & TPDM_PIDR0_DS_DSB); +} + +static umode_t tpdm_dsb_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + if (drvdata && tpdm_has_dsb_dataset(drvdata)) + return attr->mode; + + return 0; +} + +static umode_t tpdm_dsb_msr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct device_attribute *dev_attr = + container_of(attr, struct device_attribute, attr); + struct tpdm_dataset_attribute *tpdm_attr = + container_of(dev_attr, struct tpdm_dataset_attribute, attr); + + if (tpdm_attr->idx < drvdata->dsb_msr_num) + return attr->mode; + + return 0; +} + +static void tpdm_reset_datasets(struct tpdm_drvdata *drvdata) +{ + if (tpdm_has_dsb_dataset(drvdata)) { + memset(drvdata->dsb, 0, sizeof(struct dsb_dataset)); + + drvdata->dsb->trig_ts = true; + drvdata->dsb->trig_type = false; + } +} + +static void set_dsb_mode(struct tpdm_drvdata *drvdata, u32 *val) +{ + u32 mode; + + /* Set the test accurate mode */ + mode = TPDM_DSB_MODE_TEST(drvdata->dsb->mode); + *val &= ~TPDM_DSB_CR_TEST_MODE; + *val |= FIELD_PREP(TPDM_DSB_CR_TEST_MODE, mode); + + /* Set the byte lane for high-performance mode */ + mode = TPDM_DSB_MODE_HPBYTESEL(drvdata->dsb->mode); + *val &= ~TPDM_DSB_CR_HPSEL; + *val |= FIELD_PREP(TPDM_DSB_CR_HPSEL, mode); + + /* Set the performance mode */ + if (drvdata->dsb->mode & TPDM_DSB_MODE_PERF) + *val |= TPDM_DSB_CR_MODE; + else + *val &= ~TPDM_DSB_CR_MODE; +} + +static void set_dsb_tier(struct tpdm_drvdata *drvdata) { u32 val; - /* Set the enable bit of DSB control register to 1 */ + val = readl_relaxed(drvdata->base + TPDM_DSB_TIER); + + /* Clear all relevant fields */ + val &= ~(TPDM_DSB_TIER_PATT_TSENAB | TPDM_DSB_TIER_PATT_TYPE | + TPDM_DSB_TIER_XTRIG_TSENAB); + + /* Set pattern timestamp type and enablement */ + if (drvdata->dsb->patt_ts) { + val |= TPDM_DSB_TIER_PATT_TSENAB; + if (drvdata->dsb->patt_type) + val |= TPDM_DSB_TIER_PATT_TYPE; + else + val &= ~TPDM_DSB_TIER_PATT_TYPE; + } else { + val &= ~TPDM_DSB_TIER_PATT_TSENAB; + } + + /* Set trigger timestamp */ + if (drvdata->dsb->trig_ts) + val |= TPDM_DSB_TIER_XTRIG_TSENAB; + else + val &= ~TPDM_DSB_TIER_XTRIG_TSENAB; + + writel_relaxed(val, drvdata->base + TPDM_DSB_TIER); +} + +static void set_dsb_msr(struct tpdm_drvdata *drvdata) +{ + int i; + + for (i = 0; i < drvdata->dsb_msr_num; i++) + writel_relaxed(drvdata->dsb->msr[i], + drvdata->base + TPDM_DSB_MSR(i)); +} + +static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata) +{ + u32 val, i; + + for (i = 0; i < TPDM_DSB_MAX_EDCR; i++) + writel_relaxed(drvdata->dsb->edge_ctrl[i], + drvdata->base + TPDM_DSB_EDCR(i)); + for (i = 0; i < TPDM_DSB_MAX_EDCMR; i++) + writel_relaxed(drvdata->dsb->edge_ctrl_mask[i], + drvdata->base + TPDM_DSB_EDCMR(i)); + for (i = 0; i < TPDM_DSB_MAX_PATT; i++) { + writel_relaxed(drvdata->dsb->patt_val[i], + drvdata->base + TPDM_DSB_TPR(i)); + writel_relaxed(drvdata->dsb->patt_mask[i], + drvdata->base + TPDM_DSB_TPMR(i)); + writel_relaxed(drvdata->dsb->trig_patt[i], + drvdata->base + TPDM_DSB_XPR(i)); + writel_relaxed(drvdata->dsb->trig_patt_mask[i], + drvdata->base + TPDM_DSB_XPMR(i)); + } + + set_dsb_tier(drvdata); + + set_dsb_msr(drvdata); + val = readl_relaxed(drvdata->base + TPDM_DSB_CR); + /* Set the mode of DSB dataset */ + set_dsb_mode(drvdata, &val); + /* Set trigger type */ + if (drvdata->dsb->trig_type) + val |= TPDM_DSB_CR_TRIG_TYPE; + else + val &= ~TPDM_DSB_CR_TRIG_TYPE; + /* Set the enable bit of DSB control register to 1 */ val |= TPDM_DSB_CR_ENA; writel_relaxed(val, drvdata->base + TPDM_DSB_CR); } -/* TPDM enable operations */ +/* + * TPDM enable operations + * The TPDM or Monitor serves as data collection component for various + * dataset types. It covers Basic Counts(BC), Tenure Counts(TC), + * Continuous Multi-Bit(CMB), Multi-lane CMB(MCMB) and Discrete Single + * Bit(DSB). This function will initialize the configuration according + * to the dataset type supported by the TPDM. + */ static void __tpdm_enable(struct tpdm_drvdata *drvdata) { CS_UNLOCK(drvdata->base); - /* Check if DSB datasets is present for TPDM. */ - if (drvdata->datasets & TPDM_PIDR0_DS_DSB) + if (tpdm_has_dsb_dataset(drvdata)) tpdm_enable_dsb(drvdata); CS_LOCK(drvdata->base); @@ -76,8 +319,7 @@ static void __tpdm_disable(struct tpdm_drvdata *drvdata) { CS_UNLOCK(drvdata->base); - /* Check if DSB datasets is present for TPDM. */ - if (drvdata->datasets & TPDM_PIDR0_DS_DSB) + if (tpdm_has_dsb_dataset(drvdata)) tpdm_disable_dsb(drvdata); CS_LOCK(drvdata->base); @@ -110,16 +352,45 @@ static const struct coresight_ops tpdm_cs_ops = { .source_ops = &tpdm_source_ops, }; -static void tpdm_init_default_data(struct tpdm_drvdata *drvdata) +static int tpdm_datasets_setup(struct tpdm_drvdata *drvdata) { u32 pidr; - CS_UNLOCK(drvdata->base); /* Get the datasets present on the TPDM. */ pidr = readl_relaxed(drvdata->base + CORESIGHT_PERIPHIDR0); drvdata->datasets |= pidr & GENMASK(TPDM_DATASETS - 1, 0); - CS_LOCK(drvdata->base); + + if (tpdm_has_dsb_dataset(drvdata) && (!drvdata->dsb)) { + drvdata->dsb = devm_kzalloc(drvdata->dev, + sizeof(*drvdata->dsb), GFP_KERNEL); + if (!drvdata->dsb) + return -ENOMEM; + } + tpdm_reset_datasets(drvdata); + + return 0; +} + +static ssize_t reset_dataset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + int ret = 0; + unsigned long val; + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + ret = kstrtoul(buf, 0, &val); + if (ret || val != 1) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + tpdm_reset_datasets(drvdata); + spin_unlock(&drvdata->spinlock); + + return size; } +static DEVICE_ATTR_WO(reset_dataset); /* * value 1: 64 bits test data @@ -161,6 +432,7 @@ static ssize_t integration_test_store(struct device *dev, static DEVICE_ATTR_WO(integration_test); static struct attribute *tpdm_attrs[] = { + &dev_attr_reset_dataset.attr, &dev_attr_integration_test.attr, NULL, }; @@ -169,8 +441,421 @@ static struct attribute_group tpdm_attr_grp = { .attrs = tpdm_attrs, }; +static ssize_t dsb_mode_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%x\n", drvdata->dsb->mode); +} + +static ssize_t dsb_mode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val < 0) || + (val & ~TPDM_DSB_MODE_MASK)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + drvdata->dsb->mode = val & TPDM_DSB_MODE_MASK; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_mode); + +static ssize_t ctrl_idx_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->edge_ctrl_idx); +} + +/* + * The EDCR registers can include up to 16 32-bit registers, and each + * one can be configured to control up to 16 edge detections(2 bits + * control one edge detection). So a total 256 edge detections can be + * configured. This function provides a way to set the index number of + * the edge detection which needs to be configured. + */ +static ssize_t ctrl_idx_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val >= TPDM_DSB_MAX_LINES)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + drvdata->dsb->edge_ctrl_idx = val; + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_RW(ctrl_idx); + +/* + * This function is used to control the edge detection according + * to the index number that has been set. + * "edge_ctrl" should be one of the following values. + * 0 - Rising edge detection + * 1 - Falling edge detection + * 2 - Rising and falling edge detection (toggle detection) + */ +static ssize_t ctrl_val_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val, edge_ctrl; + int reg; + + if ((kstrtoul(buf, 0, &edge_ctrl)) || (edge_ctrl > 0x2)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + /* + * There are 2 bit per DSB Edge Control line. + * Thus we have 16 lines in a 32bit word. + */ + reg = EDCR_TO_WORD_IDX(drvdata->dsb->edge_ctrl_idx); + val = drvdata->dsb->edge_ctrl[reg]; + val &= ~EDCR_TO_WORD_MASK(drvdata->dsb->edge_ctrl_idx); + val |= EDCR_TO_WORD_VAL(edge_ctrl, drvdata->dsb->edge_ctrl_idx); + drvdata->dsb->edge_ctrl[reg] = val; + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_WO(ctrl_val); + +static ssize_t ctrl_mask_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + u32 set; + int reg; + + if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + /* + * There is 1 bit per DSB Edge Control Mark line. + * Thus we have 32 lines in a 32bit word. + */ + reg = EDCMR_TO_WORD_IDX(drvdata->dsb->edge_ctrl_idx); + set = drvdata->dsb->edge_ctrl_mask[reg]; + if (val) + set |= BIT(EDCMR_TO_WORD_SHIFT(drvdata->dsb->edge_ctrl_idx)); + else + set &= ~BIT(EDCMR_TO_WORD_SHIFT(drvdata->dsb->edge_ctrl_idx)); + drvdata->dsb->edge_ctrl_mask[reg] = set; + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_WO(ctrl_mask); + +static ssize_t enable_ts_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->patt_ts); +} + +/* + * value 1: Enable/Disable DSB pattern timestamp + */ +static ssize_t enable_ts_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + drvdata->dsb->patt_ts = !!val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(enable_ts); + +static ssize_t set_type_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->patt_type); +} + +/* + * value 1: Set DSB pattern type + */ +static ssize_t set_type_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + drvdata->dsb->patt_type = val; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(set_type); + +static ssize_t dsb_trig_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->trig_type); +} + +/* + * Trigger type (boolean): + * false - Disable trigger type. + * true - Enable trigger type. + */ +static ssize_t dsb_trig_type_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + if (val) + drvdata->dsb->trig_type = true; + else + drvdata->dsb->trig_type = false; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_trig_type); + +static ssize_t dsb_trig_ts_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return sysfs_emit(buf, "%u\n", + (unsigned int)drvdata->dsb->trig_ts); +} + +/* + * Trigger timestamp (boolean): + * false - Disable trigger timestamp. + * true - Enable trigger timestamp. + */ +static ssize_t dsb_trig_ts_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if ((kstrtoul(buf, 0, &val)) || (val & ~1UL)) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + if (val) + drvdata->dsb->trig_ts = true; + else + drvdata->dsb->trig_ts = false; + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(dsb_trig_ts); + +static struct attribute *tpdm_dsb_edge_attrs[] = { + &dev_attr_ctrl_idx.attr, + &dev_attr_ctrl_val.attr, + &dev_attr_ctrl_mask.attr, + DSB_EDGE_CTRL_ATTR(0), + DSB_EDGE_CTRL_ATTR(1), + DSB_EDGE_CTRL_ATTR(2), + DSB_EDGE_CTRL_ATTR(3), + DSB_EDGE_CTRL_ATTR(4), + DSB_EDGE_CTRL_ATTR(5), + DSB_EDGE_CTRL_ATTR(6), + DSB_EDGE_CTRL_ATTR(7), + DSB_EDGE_CTRL_ATTR(8), + DSB_EDGE_CTRL_ATTR(9), + DSB_EDGE_CTRL_ATTR(10), + DSB_EDGE_CTRL_ATTR(11), + DSB_EDGE_CTRL_ATTR(12), + DSB_EDGE_CTRL_ATTR(13), + DSB_EDGE_CTRL_ATTR(14), + DSB_EDGE_CTRL_ATTR(15), + DSB_EDGE_CTRL_MASK_ATTR(0), + DSB_EDGE_CTRL_MASK_ATTR(1), + DSB_EDGE_CTRL_MASK_ATTR(2), + DSB_EDGE_CTRL_MASK_ATTR(3), + DSB_EDGE_CTRL_MASK_ATTR(4), + DSB_EDGE_CTRL_MASK_ATTR(5), + DSB_EDGE_CTRL_MASK_ATTR(6), + DSB_EDGE_CTRL_MASK_ATTR(7), + NULL, +}; + +static struct attribute *tpdm_dsb_trig_patt_attrs[] = { + DSB_TRIG_PATT_ATTR(0), + DSB_TRIG_PATT_ATTR(1), + DSB_TRIG_PATT_ATTR(2), + DSB_TRIG_PATT_ATTR(3), + DSB_TRIG_PATT_ATTR(4), + DSB_TRIG_PATT_ATTR(5), + DSB_TRIG_PATT_ATTR(6), + DSB_TRIG_PATT_ATTR(7), + DSB_TRIG_PATT_MASK_ATTR(0), + DSB_TRIG_PATT_MASK_ATTR(1), + DSB_TRIG_PATT_MASK_ATTR(2), + DSB_TRIG_PATT_MASK_ATTR(3), + DSB_TRIG_PATT_MASK_ATTR(4), + DSB_TRIG_PATT_MASK_ATTR(5), + DSB_TRIG_PATT_MASK_ATTR(6), + DSB_TRIG_PATT_MASK_ATTR(7), + NULL, +}; + +static struct attribute *tpdm_dsb_patt_attrs[] = { + DSB_PATT_ATTR(0), + DSB_PATT_ATTR(1), + DSB_PATT_ATTR(2), + DSB_PATT_ATTR(3), + DSB_PATT_ATTR(4), + DSB_PATT_ATTR(5), + DSB_PATT_ATTR(6), + DSB_PATT_ATTR(7), + DSB_PATT_MASK_ATTR(0), + DSB_PATT_MASK_ATTR(1), + DSB_PATT_MASK_ATTR(2), + DSB_PATT_MASK_ATTR(3), + DSB_PATT_MASK_ATTR(4), + DSB_PATT_MASK_ATTR(5), + DSB_PATT_MASK_ATTR(6), + DSB_PATT_MASK_ATTR(7), + &dev_attr_enable_ts.attr, + &dev_attr_set_type.attr, + NULL, +}; + +static struct attribute *tpdm_dsb_msr_attrs[] = { + DSB_MSR_ATTR(0), + DSB_MSR_ATTR(1), + DSB_MSR_ATTR(2), + DSB_MSR_ATTR(3), + DSB_MSR_ATTR(4), + DSB_MSR_ATTR(5), + DSB_MSR_ATTR(6), + DSB_MSR_ATTR(7), + DSB_MSR_ATTR(8), + DSB_MSR_ATTR(9), + DSB_MSR_ATTR(10), + DSB_MSR_ATTR(11), + DSB_MSR_ATTR(12), + DSB_MSR_ATTR(13), + DSB_MSR_ATTR(14), + DSB_MSR_ATTR(15), + DSB_MSR_ATTR(16), + DSB_MSR_ATTR(17), + DSB_MSR_ATTR(18), + DSB_MSR_ATTR(19), + DSB_MSR_ATTR(20), + DSB_MSR_ATTR(21), + DSB_MSR_ATTR(22), + DSB_MSR_ATTR(23), + DSB_MSR_ATTR(24), + DSB_MSR_ATTR(25), + DSB_MSR_ATTR(26), + DSB_MSR_ATTR(27), + DSB_MSR_ATTR(28), + DSB_MSR_ATTR(29), + DSB_MSR_ATTR(30), + DSB_MSR_ATTR(31), + NULL, +}; + +static struct attribute *tpdm_dsb_attrs[] = { + &dev_attr_dsb_mode.attr, + &dev_attr_dsb_trig_ts.attr, + &dev_attr_dsb_trig_type.attr, + NULL, +}; + +static struct attribute_group tpdm_dsb_attr_grp = { + .attrs = tpdm_dsb_attrs, + .is_visible = tpdm_dsb_is_visible, +}; + +static struct attribute_group tpdm_dsb_edge_grp = { + .attrs = tpdm_dsb_edge_attrs, + .is_visible = tpdm_dsb_is_visible, + .name = "dsb_edge", +}; + +static struct attribute_group tpdm_dsb_trig_patt_grp = { + .attrs = tpdm_dsb_trig_patt_attrs, + .is_visible = tpdm_dsb_is_visible, + .name = "dsb_trig_patt", +}; + +static struct attribute_group tpdm_dsb_patt_grp = { + .attrs = tpdm_dsb_patt_attrs, + .is_visible = tpdm_dsb_is_visible, + .name = "dsb_patt", +}; + +static struct attribute_group tpdm_dsb_msr_grp = { + .attrs = tpdm_dsb_msr_attrs, + .is_visible = tpdm_dsb_msr_is_visible, + .name = "dsb_msr", +}; + static const struct attribute_group *tpdm_attr_grps[] = { &tpdm_attr_grp, + &tpdm_dsb_attr_grp, + &tpdm_dsb_edge_grp, + &tpdm_dsb_trig_patt_grp, + &tpdm_dsb_patt_grp, + &tpdm_dsb_msr_grp, NULL, }; @@ -181,6 +866,7 @@ static int tpdm_probe(struct amba_device *adev, const struct amba_id *id) struct coresight_platform_data *pdata; struct tpdm_drvdata *drvdata; struct coresight_desc desc = { 0 }; + int ret; pdata = coresight_get_platform_data(dev); if (IS_ERR(pdata)) @@ -200,12 +886,20 @@ static int tpdm_probe(struct amba_device *adev, const struct amba_id *id) drvdata->base = base; + ret = tpdm_datasets_setup(drvdata); + if (ret) + return ret; + + if (drvdata && tpdm_has_dsb_dataset(drvdata)) + of_property_read_u32(drvdata->dev->of_node, + "qcom,dsb-msrs-num", &drvdata->dsb_msr_num); + /* Set up coresight component description */ desc.name = coresight_alloc_device_name(&tpdm_devs, dev); if (!desc.name) return -ENOMEM; desc.type = CORESIGHT_DEV_TYPE_SOURCE; - desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS; + desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM; desc.ops = &tpdm_cs_ops; desc.pdata = adev->dev.platform_data; desc.dev = &adev->dev; @@ -216,7 +910,7 @@ static int tpdm_probe(struct amba_device *adev, const struct amba_id *id) return PTR_ERR(drvdata->csdev); spin_lock_init(&drvdata->spinlock); - tpdm_init_default_data(drvdata); + /* Decrease pm refcount when probe is done.*/ pm_runtime_put(&adev->dev); diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h index 543854043a..4115b2a17b 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.h +++ b/drivers/hwtracing/coresight/coresight-tpdm.h @@ -11,8 +11,52 @@ /* DSB Subunit Registers */ #define TPDM_DSB_CR (0x780) +#define TPDM_DSB_TIER (0x784) +#define TPDM_DSB_TPR(n) (0x788 + (n * 4)) +#define TPDM_DSB_TPMR(n) (0x7A8 + (n * 4)) +#define TPDM_DSB_XPR(n) (0x7C8 + (n * 4)) +#define TPDM_DSB_XPMR(n) (0x7E8 + (n * 4)) +#define TPDM_DSB_EDCR(n) (0x808 + (n * 4)) +#define TPDM_DSB_EDCMR(n) (0x848 + (n * 4)) +#define TPDM_DSB_MSR(n) (0x980 + (n * 4)) + /* Enable bit for DSB subunit */ #define TPDM_DSB_CR_ENA BIT(0) +/* Enable bit for DSB subunit perfmance mode */ +#define TPDM_DSB_CR_MODE BIT(1) +/* Enable bit for DSB subunit trigger type */ +#define TPDM_DSB_CR_TRIG_TYPE BIT(12) +/* Data bits for DSB high performace mode */ +#define TPDM_DSB_CR_HPSEL GENMASK(6, 2) +/* Data bits for DSB test mode */ +#define TPDM_DSB_CR_TEST_MODE GENMASK(10, 9) + +/* Enable bit for DSB subunit pattern timestamp */ +#define TPDM_DSB_TIER_PATT_TSENAB BIT(0) +/* Enable bit for DSB subunit trigger timestamp */ +#define TPDM_DSB_TIER_XTRIG_TSENAB BIT(1) +/* Bit for DSB subunit pattern type */ +#define TPDM_DSB_TIER_PATT_TYPE BIT(2) + +/* DSB programming modes */ +/* DSB mode bits mask */ +#define TPDM_DSB_MODE_MASK GENMASK(8, 0) +/* Test mode control bit*/ +#define TPDM_DSB_MODE_TEST(val) (val & GENMASK(1, 0)) +/* Performance mode */ +#define TPDM_DSB_MODE_PERF BIT(3) +/* High performance mode */ +#define TPDM_DSB_MODE_HPBYTESEL(val) (val & GENMASK(8, 4)) + +#define EDCRS_PER_WORD 16 +#define EDCR_TO_WORD_IDX(r) ((r) / EDCRS_PER_WORD) +#define EDCR_TO_WORD_SHIFT(r) ((r % EDCRS_PER_WORD) * 2) +#define EDCR_TO_WORD_VAL(val, r) (val << EDCR_TO_WORD_SHIFT(r)) +#define EDCR_TO_WORD_MASK(r) EDCR_TO_WORD_VAL(0x3, r) + +#define EDCMRS_PER_WORD 32 +#define EDCMR_TO_WORD_IDX(r) ((r) / EDCMRS_PER_WORD) +#define EDCMR_TO_WORD_SHIFT(r) ((r) % EDCMRS_PER_WORD) /* TPDM integration test registers */ #define TPDM_ITATBCNTRL (0xEF0) @@ -40,6 +84,95 @@ #define TPDM_PIDR0_DS_IMPDEF BIT(0) #define TPDM_PIDR0_DS_DSB BIT(1) +#define TPDM_DSB_MAX_LINES 256 +/* MAX number of EDCR registers */ +#define TPDM_DSB_MAX_EDCR 16 +/* MAX number of EDCMR registers */ +#define TPDM_DSB_MAX_EDCMR 8 +/* MAX number of DSB pattern */ +#define TPDM_DSB_MAX_PATT 8 +/* MAX number of DSB MSR */ +#define TPDM_DSB_MAX_MSR 32 + +#define tpdm_simple_dataset_ro(name, mem, idx) \ + (&((struct tpdm_dataset_attribute[]) { \ + { \ + __ATTR(name, 0444, tpdm_simple_dataset_show, NULL), \ + mem, \ + idx, \ + } \ + })[0].attr.attr) + +#define tpdm_simple_dataset_rw(name, mem, idx) \ + (&((struct tpdm_dataset_attribute[]) { \ + { \ + __ATTR(name, 0644, tpdm_simple_dataset_show, \ + tpdm_simple_dataset_store), \ + mem, \ + idx, \ + } \ + })[0].attr.attr) + +#define DSB_EDGE_CTRL_ATTR(nr) \ + tpdm_simple_dataset_ro(edcr##nr, \ + DSB_EDGE_CTRL, nr) + +#define DSB_EDGE_CTRL_MASK_ATTR(nr) \ + tpdm_simple_dataset_ro(edcmr##nr, \ + DSB_EDGE_CTRL_MASK, nr) + +#define DSB_TRIG_PATT_ATTR(nr) \ + tpdm_simple_dataset_rw(xpr##nr, \ + DSB_TRIG_PATT, nr) + +#define DSB_TRIG_PATT_MASK_ATTR(nr) \ + tpdm_simple_dataset_rw(xpmr##nr, \ + DSB_TRIG_PATT_MASK, nr) + +#define DSB_PATT_ATTR(nr) \ + tpdm_simple_dataset_rw(tpr##nr, \ + DSB_PATT, nr) + +#define DSB_PATT_MASK_ATTR(nr) \ + tpdm_simple_dataset_rw(tpmr##nr, \ + DSB_PATT_MASK, nr) + +#define DSB_MSR_ATTR(nr) \ + tpdm_simple_dataset_rw(msr##nr, \ + DSB_MSR, nr) + +/** + * struct dsb_dataset - specifics associated to dsb dataset + * @mode: DSB programming mode + * @edge_ctrl_idx Index number of the edge control + * @edge_ctrl: Save value for edge control + * @edge_ctrl_mask: Save value for edge control mask + * @patt_val: Save value for pattern + * @patt_mask: Save value for pattern mask + * @trig_patt: Save value for trigger pattern + * @trig_patt_mask: Save value for trigger pattern mask + * @msr Save value for MSR + * @patt_ts: Enable/Disable pattern timestamp + * @patt_type: Set pattern type + * @trig_ts: Enable/Disable trigger timestamp. + * @trig_type: Enable/Disable trigger type. + */ +struct dsb_dataset { + u32 mode; + u32 edge_ctrl_idx; + u32 edge_ctrl[TPDM_DSB_MAX_EDCR]; + u32 edge_ctrl_mask[TPDM_DSB_MAX_EDCMR]; + u32 patt_val[TPDM_DSB_MAX_PATT]; + u32 patt_mask[TPDM_DSB_MAX_PATT]; + u32 trig_patt[TPDM_DSB_MAX_PATT]; + u32 trig_patt_mask[TPDM_DSB_MAX_PATT]; + u32 msr[TPDM_DSB_MAX_MSR]; + bool patt_ts; + bool patt_type; + bool trig_ts; + bool trig_type; +}; + /** * struct tpdm_drvdata - specifics associated to an TPDM component * @base: memory mapped base address for this component. @@ -48,6 +181,8 @@ * @spinlock: lock for the drvdata value. * @enable: enable status of the component. * @datasets: The datasets types present of the TPDM. + * @dsb Specifics associated to TPDM DSB. + * @dsb_msr_num Number of MSR supported by DSB TPDM */ struct tpdm_drvdata { @@ -57,6 +192,32 @@ struct tpdm_drvdata { spinlock_t spinlock; bool enable; unsigned long datasets; + struct dsb_dataset *dsb; + u32 dsb_msr_num; +}; + +/* Enumerate members of various datasets */ +enum dataset_mem { + DSB_EDGE_CTRL, + DSB_EDGE_CTRL_MASK, + DSB_TRIG_PATT, + DSB_TRIG_PATT_MASK, + DSB_PATT, + DSB_PATT_MASK, + DSB_MSR, +}; + +/** + * struct tpdm_dataset_attribute - Record the member variables and + * index number of datasets that need to be operated by sysfs file + * @attr: The device attribute + * @mem: The member in the dataset data structure + * @idx: The index number of the array data + */ +struct tpdm_dataset_attribute { + struct device_attribute attr; + enum dataset_mem mem; + u32 idx; }; #endif /* _CORESIGHT_CORESIGHT_TPDM_H */ diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index e20c1c6acc..6136776482 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -1253,8 +1253,18 @@ static void arm_trbe_register_coresight_cpu(struct trbe_drvdata *drvdata, int cp desc.name = devm_kasprintf(dev, GFP_KERNEL, "trbe%d", cpu); if (!desc.name) goto cpu_clear; - - desc.pdata = coresight_get_platform_data(dev); + /* + * TRBE coresight devices do not need regular connections + * information, as the paths get built between all percpu + * source and their respective percpu sink devices. Though + * coresight_register() expect device connections via the + * platform_data, which TRBE devices do not have. As they + * are not real ACPI devices, coresight_get_platform_data() + * ends up failing. Instead let's allocate a dummy zeroed + * coresight_platform_data structure and assign that back + * into the device for that purpose. + */ + desc.pdata = devm_kzalloc(dev, sizeof(*desc.pdata), GFP_KERNEL); if (IS_ERR(desc.pdata)) goto cpu_clear; @@ -1520,14 +1530,13 @@ probe_failed: return ret; } -static int arm_trbe_device_remove(struct platform_device *pdev) +static void arm_trbe_device_remove(struct platform_device *pdev) { struct trbe_drvdata *drvdata = platform_get_drvdata(pdev); arm_trbe_remove_cpuhp(drvdata); arm_trbe_remove_coresight(drvdata); arm_trbe_remove_irq(drvdata); - return 0; } static const struct of_device_id arm_trbe_of_match[] = { @@ -1536,14 +1545,23 @@ static const struct of_device_id arm_trbe_of_match[] = { }; MODULE_DEVICE_TABLE(of, arm_trbe_of_match); +#ifdef CONFIG_ACPI +static const struct platform_device_id arm_trbe_acpi_match[] = { + { ARMV8_TRBE_PDEV_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match); +#endif + static struct platform_driver arm_trbe_driver = { + .id_table = ACPI_PTR(arm_trbe_acpi_match), .driver = { .name = DRVNAME, .of_match_table = of_match_ptr(arm_trbe_of_match), .suppress_bind_attrs = true, }, .probe = arm_trbe_device_probe, - .remove = arm_trbe_device_remove, + .remove_new = arm_trbe_device_remove, }; static int __init arm_trbe_init(void) diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h index e915e749be..45202c48ac 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.h +++ b/drivers/hwtracing/coresight/coresight-trbe.h @@ -7,11 +7,13 @@ * * Author: Anshuman Khandual <anshuman.khandual@arm.com> */ +#include <linux/acpi.h> #include <linux/coresight.h> #include <linux/device.h> #include <linux/irq.h> #include <linux/kernel.h> #include <linux/of.h> +#include <linux/perf/arm_pmu.h> #include <linux/platform_device.h> #include <linux/smp.h> diff --git a/drivers/hwtracing/coresight/ultrasoc-smb.c b/drivers/hwtracing/coresight/ultrasoc-smb.c index 6e32d31a95..10e886455b 100644 --- a/drivers/hwtracing/coresight/ultrasoc-smb.c +++ b/drivers/hwtracing/coresight/ultrasoc-smb.c @@ -97,27 +97,19 @@ static int smb_open(struct inode *inode, struct file *file) { struct smb_drv_data *drvdata = container_of(file->private_data, struct smb_drv_data, miscdev); - int ret = 0; - spin_lock(&drvdata->spinlock); + guard(spinlock)(&drvdata->spinlock); - if (drvdata->reading) { - ret = -EBUSY; - goto out; - } + if (drvdata->reading) + return -EBUSY; - if (atomic_read(&drvdata->csdev->refcnt)) { - ret = -EBUSY; - goto out; - } + if (atomic_read(&drvdata->csdev->refcnt)) + return -EBUSY; smb_update_data_size(drvdata); - drvdata->reading = true; -out: - spin_unlock(&drvdata->spinlock); - return ret; + return 0; } static ssize_t smb_read(struct file *file, char __user *data, size_t len, @@ -160,9 +152,8 @@ static int smb_release(struct inode *inode, struct file *file) struct smb_drv_data *drvdata = container_of(file->private_data, struct smb_drv_data, miscdev); - spin_lock(&drvdata->spinlock); + guard(spinlock)(&drvdata->spinlock); drvdata->reading = false; - spin_unlock(&drvdata->spinlock); return 0; } @@ -255,19 +246,15 @@ static int smb_enable(struct coresight_device *csdev, enum cs_mode mode, struct smb_drv_data *drvdata = dev_get_drvdata(csdev->dev.parent); int ret = 0; - spin_lock(&drvdata->spinlock); + guard(spinlock)(&drvdata->spinlock); /* Do nothing, the trace data is reading by other interface now */ - if (drvdata->reading) { - ret = -EBUSY; - goto out; - } + if (drvdata->reading) + return -EBUSY; /* Do nothing, the SMB is already enabled as other mode */ - if (drvdata->mode != CS_MODE_DISABLED && drvdata->mode != mode) { - ret = -EBUSY; - goto out; - } + if (drvdata->mode != CS_MODE_DISABLED && drvdata->mode != mode) + return -EBUSY; switch (mode) { case CS_MODE_SYSFS: @@ -281,13 +268,10 @@ static int smb_enable(struct coresight_device *csdev, enum cs_mode mode, } if (ret) - goto out; + return ret; atomic_inc(&csdev->refcnt); - dev_dbg(&csdev->dev, "Ultrasoc SMB enabled\n"); -out: - spin_unlock(&drvdata->spinlock); return ret; } @@ -295,19 +279,14 @@ out: static int smb_disable(struct coresight_device *csdev) { struct smb_drv_data *drvdata = dev_get_drvdata(csdev->dev.parent); - int ret = 0; - spin_lock(&drvdata->spinlock); + guard(spinlock)(&drvdata->spinlock); - if (drvdata->reading) { - ret = -EBUSY; - goto out; - } + if (drvdata->reading) + return -EBUSY; - if (atomic_dec_return(&csdev->refcnt)) { - ret = -EBUSY; - goto out; - } + if (atomic_dec_return(&csdev->refcnt)) + return -EBUSY; /* Complain if we (somehow) got out of sync */ WARN_ON_ONCE(drvdata->mode == CS_MODE_DISABLED); @@ -317,12 +296,9 @@ static int smb_disable(struct coresight_device *csdev) /* Dissociate from the target process. */ drvdata->pid = -1; drvdata->mode = CS_MODE_DISABLED; - dev_dbg(&csdev->dev, "Ultrasoc SMB disabled\n"); -out: - spin_unlock(&drvdata->spinlock); - return ret; + return 0; } static void *smb_alloc_buffer(struct coresight_device *csdev, @@ -395,17 +371,17 @@ static unsigned long smb_update_buffer(struct coresight_device *csdev, struct smb_drv_data *drvdata = dev_get_drvdata(csdev->dev.parent); struct smb_data_buffer *sdb = &drvdata->sdb; struct cs_buffers *buf = sink_config; - unsigned long data_size = 0; + unsigned long data_size; bool lost = false; if (!buf) return 0; - spin_lock(&drvdata->spinlock); + guard(spinlock)(&drvdata->spinlock); /* Don't do anything if another tracer is using this sink. */ if (atomic_read(&csdev->refcnt) != 1) - goto out; + return 0; smb_disable_hw(drvdata); smb_update_data_size(drvdata); @@ -424,8 +400,6 @@ static unsigned long smb_update_buffer(struct coresight_device *csdev, smb_sync_perf_buffer(drvdata, buf, handle->head); if (!buf->snapshot && lost) perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED); -out: - spin_unlock(&drvdata->spinlock); return data_size; } @@ -601,15 +575,13 @@ static int smb_probe(struct platform_device *pdev) return 0; } -static int smb_remove(struct platform_device *pdev) +static void smb_remove(struct platform_device *pdev) { struct smb_drv_data *drvdata = platform_get_drvdata(pdev); smb_unregister_sink(drvdata); smb_config_inport(&pdev->dev, false); - - return 0; } #ifdef CONFIG_ACPI @@ -627,7 +599,7 @@ static struct platform_driver smb_driver = { .suppress_bind_attrs = true, }, .probe = smb_probe, - .remove = smb_remove, + .remove_new = smb_remove, }; module_platform_driver(smb_driver); |