| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mike Leach | 5390 | 99.45% | 6 | 66.67% |
| Stephen Boyd | 19 | 0.35% | 2 | 22.22% |
| Suzuki K. Poulose | 11 | 0.20% | 1 | 11.11% |
| Total | 5420 | 9 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 Linaro Limited, All rights reserved. * Author: Mike Leach <mike.leach@linaro.org> */ #include <linux/atomic.h> #include <linux/coresight.h> #include <linux/device.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/spinlock.h> #include <linux/sysfs.h> #include "coresight-cti.h" /* * Declare the number of static declared attribute groups * Value includes groups + NULL value at end of table. */ #define CORESIGHT_CTI_STATIC_GROUPS_MAX 5 /* * List of trigger signal type names. Match the constants declared in * include\dt-bindings\arm\coresight-cti-dt.h */ static const char * const sig_type_names[] = { "genio", /* GEN_IO */ "intreq", /* GEN_INTREQ */ "intack", /* GEN_INTACK */ "haltreq", /* GEN_HALTREQ */ "restartreq", /* GEN_RESTARTREQ */ "pe_edbgreq", /* PE_EDBGREQ */ "pe_dbgrestart",/* PE_DBGRESTART */ "pe_ctiirq", /* PE_CTIIRQ */ "pe_pmuirq", /* PE_PMUIRQ */ "pe_dbgtrigger",/* PE_DBGTRIGGER */ "etm_extout", /* ETM_EXTOUT */ "etm_extin", /* ETM_EXTIN */ "snk_full", /* SNK_FULL */ "snk_acqcomp", /* SNK_ACQCOMP */ "snk_flushcomp",/* SNK_FLUSHCOMP */ "snk_flushin", /* SNK_FLUSHIN */ "snk_trigin", /* SNK_TRIGIN */ "stm_asyncout", /* STM_ASYNCOUT */ "stm_tout_spte",/* STM_TOUT_SPTE */ "stm_tout_sw", /* STM_TOUT_SW */ "stm_tout_hete",/* STM_TOUT_HETE */ "stm_hwevent", /* STM_HWEVENT */ "ela_tstart", /* ELA_TSTART */ "ela_tstop", /* ELA_TSTOP */ "ela_dbgreq", /* ELA_DBGREQ */ }; /* Show function pointer used in the connections dynamic declared attributes*/ typedef ssize_t (*p_show_fn)(struct device *dev, struct device_attribute *attr, char *buf); /* Connection attribute types */ enum cti_conn_attr_type { CTI_CON_ATTR_NAME, CTI_CON_ATTR_TRIGIN_SIG, CTI_CON_ATTR_TRIGOUT_SIG, CTI_CON_ATTR_TRIGIN_TYPES, CTI_CON_ATTR_TRIGOUT_TYPES, CTI_CON_ATTR_MAX, }; /* Names for the connection attributes */ static const char * const con_attr_names[CTI_CON_ATTR_MAX] = { "name", "in_signals", "out_signals", "in_types", "out_types", }; /* basic attributes */ static ssize_t enable_show(struct device *dev, struct device_attribute *attr, char *buf) { int enable_req; bool enabled, powered; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); enable_req = atomic_read(&drvdata->config.enable_req_count); spin_lock(&drvdata->spinlock); powered = drvdata->config.hw_powered; enabled = drvdata->config.hw_enabled; spin_unlock(&drvdata->spinlock); if (powered) return sprintf(buf, "%d\n", enabled); else return sprintf(buf, "%d\n", !!enable_req); } static ssize_t enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int ret = 0; unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); ret = kstrtoul(buf, 0, &val); if (ret) return ret; if (val) ret = cti_enable(drvdata->csdev); else ret = cti_disable(drvdata->csdev); if (ret) return ret; return size; } static DEVICE_ATTR_RW(enable); static ssize_t powered_show(struct device *dev, struct device_attribute *attr, char *buf) { bool powered; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); spin_lock(&drvdata->spinlock); powered = drvdata->config.hw_powered; spin_unlock(&drvdata->spinlock); return sprintf(buf, "%d\n", powered); } static DEVICE_ATTR_RO(powered); static ssize_t ctmid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); return sprintf(buf, "%d\n", drvdata->ctidev.ctm_id); } static DEVICE_ATTR_RO(ctmid); static ssize_t nr_trigger_cons_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); return sprintf(buf, "%d\n", drvdata->ctidev.nr_trig_con); } static DEVICE_ATTR_RO(nr_trigger_cons); /* attribute and group sysfs tables. */ static struct attribute *coresight_cti_attrs[] = { &dev_attr_enable.attr, &dev_attr_powered.attr, &dev_attr_ctmid.attr, &dev_attr_nr_trigger_cons.attr, NULL, }; /* register based attributes */ /* macro to access RO registers with power check only (no enable check). */ #define coresight_cti_reg(name, offset) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ u32 val = 0; \ pm_runtime_get_sync(dev->parent); \ spin_lock(&drvdata->spinlock); \ if (drvdata->config.hw_powered) \ val = readl_relaxed(drvdata->base + offset); \ spin_unlock(&drvdata->spinlock); \ pm_runtime_put_sync(dev->parent); \ return sprintf(buf, "0x%x\n", val); \ } \ static DEVICE_ATTR_RO(name) /* coresight management registers */ coresight_cti_reg(devaff0, CTIDEVAFF0); coresight_cti_reg(devaff1, CTIDEVAFF1); coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS); coresight_cti_reg(devarch, CORESIGHT_DEVARCH); coresight_cti_reg(devid, CORESIGHT_DEVID); coresight_cti_reg(devtype, CORESIGHT_DEVTYPE); coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0); coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1); coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2); coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3); coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4); static struct attribute *coresight_cti_mgmt_attrs[] = { &dev_attr_devaff0.attr, &dev_attr_devaff1.attr, &dev_attr_authstatus.attr, &dev_attr_devarch.attr, &dev_attr_devid.attr, &dev_attr_devtype.attr, &dev_attr_pidr0.attr, &dev_attr_pidr1.attr, &dev_attr_pidr2.attr, &dev_attr_pidr3.attr, &dev_attr_pidr4.attr, NULL, }; /* CTI low level programming registers */ /* * Show a simple 32 bit value if enabled and powered. * If inaccessible & pcached_val not NULL then show cached value. */ static ssize_t cti_reg32_show(struct device *dev, char *buf, u32 *pcached_val, int reg_offset) { u32 val = 0; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; spin_lock(&drvdata->spinlock); if ((reg_offset >= 0) && cti_active(config)) { CS_UNLOCK(drvdata->base); val = readl_relaxed(drvdata->base + reg_offset); if (pcached_val) *pcached_val = val; CS_LOCK(drvdata->base); } else if (pcached_val) { val = *pcached_val; } spin_unlock(&drvdata->spinlock); return sprintf(buf, "%#x\n", val); } /* * Store a simple 32 bit value. * If pcached_val not NULL, then copy to here too, * if reg_offset >= 0 then write through if enabled. */ static ssize_t cti_reg32_store(struct device *dev, const char *buf, size_t size, u32 *pcached_val, int reg_offset) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); /* local store */ if (pcached_val) *pcached_val = (u32)val; /* write through if offset and enabled */ if ((reg_offset >= 0) && cti_active(config)) cti_write_single_reg(drvdata, reg_offset, val); spin_unlock(&drvdata->spinlock); return size; } /* Standard macro for simple rw cti config registers */ #define cti_config_reg32_rw(name, cfgname, offset) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ return cti_reg32_show(dev, buf, \ &drvdata->config.cfgname, offset); \ } \ \ static ssize_t name##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t size) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ return cti_reg32_store(dev, buf, size, \ &drvdata->config.cfgname, offset); \ } \ static DEVICE_ATTR_RW(name) static ssize_t inout_sel_show(struct device *dev, struct device_attribute *attr, char *buf) { u32 val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); val = (u32)drvdata->config.ctiinout_sel; return sprintf(buf, "%d\n", val); } static ssize_t inout_sel_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); if (kstrtoul(buf, 0, &val)) return -EINVAL; if (val > (CTIINOUTEN_MAX - 1)) return -EINVAL; spin_lock(&drvdata->spinlock); drvdata->config.ctiinout_sel = val; spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_RW(inout_sel); static ssize_t inen_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long val; int index; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); spin_lock(&drvdata->spinlock); index = drvdata->config.ctiinout_sel; val = drvdata->config.ctiinen[index]; spin_unlock(&drvdata->spinlock); return sprintf(buf, "%#lx\n", val); } static ssize_t inen_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; int index; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); index = config->ctiinout_sel; config->ctiinen[index] = val; /* write through if enabled */ if (cti_active(config)) cti_write_single_reg(drvdata, CTIINEN(index), val); spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_RW(inen); static ssize_t outen_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long val; int index; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); spin_lock(&drvdata->spinlock); index = drvdata->config.ctiinout_sel; val = drvdata->config.ctiouten[index]; spin_unlock(&drvdata->spinlock); return sprintf(buf, "%#lx\n", val); } static ssize_t outen_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; int index; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); index = config->ctiinout_sel; config->ctiouten[index] = val; /* write through if enabled */ if (cti_active(config)) cti_write_single_reg(drvdata, CTIOUTEN(index), val); spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_RW(outen); static ssize_t intack_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; if (kstrtoul(buf, 0, &val)) return -EINVAL; cti_write_intack(dev, val); return size; } static DEVICE_ATTR_WO(intack); cti_config_reg32_rw(gate, ctigate, CTIGATE); cti_config_reg32_rw(asicctl, asicctl, ASICCTL); cti_config_reg32_rw(appset, ctiappset, CTIAPPSET); static ssize_t appclear_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); /* a 1'b1 in appclr clears down the same bit in appset*/ config->ctiappset &= ~val; /* write through if enabled */ if (cti_active(config)) cti_write_single_reg(drvdata, CTIAPPCLEAR, val); spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_WO(appclear); static ssize_t apppulse_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); /* write through if enabled */ if (cti_active(config)) cti_write_single_reg(drvdata, CTIAPPPULSE, val); spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_WO(apppulse); coresight_cti_reg(triginstatus, CTITRIGINSTATUS); coresight_cti_reg(trigoutstatus, CTITRIGOUTSTATUS); coresight_cti_reg(chinstatus, CTICHINSTATUS); coresight_cti_reg(choutstatus, CTICHOUTSTATUS); /* * Define CONFIG_CORESIGHT_CTI_INTEGRATION_REGS to enable the access to the * integration control registers. Normally only used to investigate connection * data. */ #ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS /* macro to access RW registers with power check only (no enable check). */ #define coresight_cti_reg_rw(name, offset) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ u32 val = 0; \ pm_runtime_get_sync(dev->parent); \ spin_lock(&drvdata->spinlock); \ if (drvdata->config.hw_powered) \ val = readl_relaxed(drvdata->base + offset); \ spin_unlock(&drvdata->spinlock); \ pm_runtime_put_sync(dev->parent); \ return sprintf(buf, "0x%x\n", val); \ } \ \ static ssize_t name##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t size) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ unsigned long val = 0; \ if (kstrtoul(buf, 0, &val)) \ return -EINVAL; \ \ pm_runtime_get_sync(dev->parent); \ spin_lock(&drvdata->spinlock); \ if (drvdata->config.hw_powered) \ cti_write_single_reg(drvdata, offset, val); \ spin_unlock(&drvdata->spinlock); \ pm_runtime_put_sync(dev->parent); \ return size; \ } \ static DEVICE_ATTR_RW(name) /* macro to access WO registers with power check only (no enable check). */ #define coresight_cti_reg_wo(name, offset) \ static ssize_t name##_store(struct device *dev, \ struct device_attribute *attr, \ const char *buf, size_t size) \ { \ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ unsigned long val = 0; \ if (kstrtoul(buf, 0, &val)) \ return -EINVAL; \ \ pm_runtime_get_sync(dev->parent); \ spin_lock(&drvdata->spinlock); \ if (drvdata->config.hw_powered) \ cti_write_single_reg(drvdata, offset, val); \ spin_unlock(&drvdata->spinlock); \ pm_runtime_put_sync(dev->parent); \ return size; \ } \ static DEVICE_ATTR_WO(name) coresight_cti_reg_rw(itchout, ITCHOUT); coresight_cti_reg_rw(ittrigout, ITTRIGOUT); coresight_cti_reg_rw(itctrl, CORESIGHT_ITCTRL); coresight_cti_reg_wo(itchinack, ITCHINACK); coresight_cti_reg_wo(ittriginack, ITTRIGINACK); coresight_cti_reg(ittrigin, ITTRIGIN); coresight_cti_reg(itchin, ITCHIN); coresight_cti_reg(itchoutack, ITCHOUTACK); coresight_cti_reg(ittrigoutack, ITTRIGOUTACK); #endif /* CORESIGHT_CTI_INTEGRATION_REGS */ static struct attribute *coresight_cti_regs_attrs[] = { &dev_attr_inout_sel.attr, &dev_attr_inen.attr, &dev_attr_outen.attr, &dev_attr_gate.attr, &dev_attr_asicctl.attr, &dev_attr_intack.attr, &dev_attr_appset.attr, &dev_attr_appclear.attr, &dev_attr_apppulse.attr, &dev_attr_triginstatus.attr, &dev_attr_trigoutstatus.attr, &dev_attr_chinstatus.attr, &dev_attr_choutstatus.attr, #ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS &dev_attr_itctrl.attr, &dev_attr_ittrigin.attr, &dev_attr_itchin.attr, &dev_attr_ittrigout.attr, &dev_attr_itchout.attr, &dev_attr_itchoutack.attr, &dev_attr_ittrigoutack.attr, &dev_attr_ittriginack.attr, &dev_attr_itchinack.attr, #endif NULL, }; /* CTI channel x-trigger programming */ static int cti_trig_op_parse(struct device *dev, enum cti_chan_op op, enum cti_trig_dir dir, const char *buf, size_t size) { u32 chan_idx; u32 trig_idx; int items, err = -EINVAL; /* extract chan idx and trigger idx */ items = sscanf(buf, "%d %d", &chan_idx, &trig_idx); if (items == 2) { err = cti_channel_trig_op(dev, op, dir, chan_idx, trig_idx); if (!err) err = size; } return err; } static ssize_t trigin_attach_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { return cti_trig_op_parse(dev, CTI_CHAN_ATTACH, CTI_TRIG_IN, buf, size); } static DEVICE_ATTR_WO(trigin_attach); static ssize_t trigin_detach_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { return cti_trig_op_parse(dev, CTI_CHAN_DETACH, CTI_TRIG_IN, buf, size); } static DEVICE_ATTR_WO(trigin_detach); static ssize_t trigout_attach_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { return cti_trig_op_parse(dev, CTI_CHAN_ATTACH, CTI_TRIG_OUT, buf, size); } static DEVICE_ATTR_WO(trigout_attach); static ssize_t trigout_detach_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { return cti_trig_op_parse(dev, CTI_CHAN_DETACH, CTI_TRIG_OUT, buf, size); } static DEVICE_ATTR_WO(trigout_detach); static ssize_t chan_gate_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int err = 0, channel = 0; if (kstrtoint(buf, 0, &channel)) return -EINVAL; err = cti_channel_gate_op(dev, CTI_GATE_CHAN_ENABLE, channel); return err ? err : size; } static ssize_t chan_gate_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; unsigned long ctigate_bitmask = cfg->ctigate; int size = 0; if (cfg->ctigate == 0) size = sprintf(buf, "\n"); else size = bitmap_print_to_pagebuf(true, buf, &ctigate_bitmask, cfg->nr_ctm_channels); return size; } static DEVICE_ATTR_RW(chan_gate_enable); static ssize_t chan_gate_disable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int err = 0, channel = 0; if (kstrtoint(buf, 0, &channel)) return -EINVAL; err = cti_channel_gate_op(dev, CTI_GATE_CHAN_DISABLE, channel); return err ? err : size; } static DEVICE_ATTR_WO(chan_gate_disable); static int chan_op_parse(struct device *dev, enum cti_chan_set_op op, const char *buf) { int err = 0, channel = 0; if (kstrtoint(buf, 0, &channel)) return -EINVAL; err = cti_channel_setop(dev, op, channel); return err; } static ssize_t chan_set_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int err = chan_op_parse(dev, CTI_CHAN_SET, buf); return err ? err : size; } static DEVICE_ATTR_WO(chan_set); static ssize_t chan_clear_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int err = chan_op_parse(dev, CTI_CHAN_CLR, buf); return err ? err : size; } static DEVICE_ATTR_WO(chan_clear); static ssize_t chan_pulse_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int err = chan_op_parse(dev, CTI_CHAN_PULSE, buf); return err ? err : size; } static DEVICE_ATTR_WO(chan_pulse); static ssize_t trig_filter_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { u32 val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); spin_lock(&drvdata->spinlock); val = drvdata->config.trig_filter_enable; spin_unlock(&drvdata->spinlock); return sprintf(buf, "%d\n", val); } static ssize_t trig_filter_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); if (kstrtoul(buf, 0, &val)) return -EINVAL; spin_lock(&drvdata->spinlock); drvdata->config.trig_filter_enable = !!val; spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_RW(trig_filter_enable); static ssize_t trigout_filtered_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; int size = 0, nr_trig_max = cfg->nr_trig_max; unsigned long mask = cfg->trig_out_filter; if (mask) size = bitmap_print_to_pagebuf(true, buf, &mask, nr_trig_max); return size; } static DEVICE_ATTR_RO(trigout_filtered); /* clear all xtrigger / channel programming */ static ssize_t chan_xtrigs_reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int i; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; spin_lock(&drvdata->spinlock); /* clear the CTI trigger / channel programming registers */ for (i = 0; i < config->nr_trig_max; i++) { config->ctiinen[i] = 0; config->ctiouten[i] = 0; } /* clear the other regs */ config->ctigate = GENMASK(config->nr_ctm_channels - 1, 0); config->asicctl = 0; config->ctiappset = 0; config->ctiinout_sel = 0; config->xtrig_rchan_sel = 0; /* if enabled then write through */ if (cti_active(config)) cti_write_all_hw_regs(drvdata); spin_unlock(&drvdata->spinlock); return size; } static DEVICE_ATTR_WO(chan_xtrigs_reset); /* * Write to select a channel to view, read to display the * cross triggers for the selected channel. */ static ssize_t chan_xtrigs_sel_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); if (kstrtoul(buf, 0, &val)) return -EINVAL; if (val > (drvdata->config.nr_ctm_channels - 1)) return -EINVAL; spin_lock(&drvdata->spinlock); drvdata->config.xtrig_rchan_sel = val; spin_unlock(&drvdata->spinlock); return size; } static ssize_t chan_xtrigs_sel_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long val; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); spin_lock(&drvdata->spinlock); val = drvdata->config.xtrig_rchan_sel; spin_unlock(&drvdata->spinlock); return sprintf(buf, "%ld\n", val); } static DEVICE_ATTR_RW(chan_xtrigs_sel); static ssize_t chan_xtrigs_in_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; int used = 0, reg_idx; int nr_trig_max = drvdata->config.nr_trig_max; u32 chan_mask = BIT(cfg->xtrig_rchan_sel); for (reg_idx = 0; reg_idx < nr_trig_max; reg_idx++) { if (chan_mask & cfg->ctiinen[reg_idx]) used += sprintf(buf + used, "%d ", reg_idx); } used += sprintf(buf + used, "\n"); return used; } static DEVICE_ATTR_RO(chan_xtrigs_in); static ssize_t chan_xtrigs_out_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; int used = 0, reg_idx; int nr_trig_max = drvdata->config.nr_trig_max; u32 chan_mask = BIT(cfg->xtrig_rchan_sel); for (reg_idx = 0; reg_idx < nr_trig_max; reg_idx++) { if (chan_mask & cfg->ctiouten[reg_idx]) used += sprintf(buf + used, "%d ", reg_idx); } used += sprintf(buf + used, "\n"); return used; } static DEVICE_ATTR_RO(chan_xtrigs_out); static ssize_t print_chan_list(struct device *dev, char *buf, bool inuse) { struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *config = &drvdata->config; int size, i; unsigned long inuse_bits = 0, chan_mask; /* scan regs to get bitmap of channels in use. */ spin_lock(&drvdata->spinlock); for (i = 0; i < config->nr_trig_max; i++) { inuse_bits |= config->ctiinen[i]; inuse_bits |= config->ctiouten[i]; } spin_unlock(&drvdata->spinlock); /* inverse bits if printing free channels */ if (!inuse) inuse_bits = ~inuse_bits; /* list of channels, or 'none' */ chan_mask = GENMASK(config->nr_ctm_channels - 1, 0); if (inuse_bits & chan_mask) size = bitmap_print_to_pagebuf(true, buf, &inuse_bits, config->nr_ctm_channels); else size = sprintf(buf, "\n"); return size; } static ssize_t chan_inuse_show(struct device *dev, struct device_attribute *attr, char *buf) { return print_chan_list(dev, buf, true); } static DEVICE_ATTR_RO(chan_inuse); static ssize_t chan_free_show(struct device *dev, struct device_attribute *attr, char *buf) { return print_chan_list(dev, buf, false); } static DEVICE_ATTR_RO(chan_free); static struct attribute *coresight_cti_channel_attrs[] = { &dev_attr_trigin_attach.attr, &dev_attr_trigin_detach.attr, &dev_attr_trigout_attach.attr, &dev_attr_trigout_detach.attr, &dev_attr_trig_filter_enable.attr, &dev_attr_trigout_filtered.attr, &dev_attr_chan_gate_enable.attr, &dev_attr_chan_gate_disable.attr, &dev_attr_chan_set.attr, &dev_attr_chan_clear.attr, &dev_attr_chan_pulse.attr, &dev_attr_chan_inuse.attr, &dev_attr_chan_free.attr, &dev_attr_chan_xtrigs_sel.attr, &dev_attr_chan_xtrigs_in.attr, &dev_attr_chan_xtrigs_out.attr, &dev_attr_chan_xtrigs_reset.attr, NULL, }; /* Create the connections trigger groups and attrs dynamically */ /* * Each connection has dynamic group triggers<N> + name, trigin/out sigs/types * attributes, + each device has static nr_trigger_cons giving the number * of groups. e.g. in sysfs:- * /cti_<name>/triggers0 * /cti_<name>/triggers1 * /cti_<name>/nr_trigger_cons * where nr_trigger_cons = 2 */ static ssize_t con_name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ext_attr = container_of(attr, struct dev_ext_attribute, attr); struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; return sprintf(buf, "%s\n", con->con_dev_name); } static ssize_t trigin_sig_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ext_attr = container_of(attr, struct dev_ext_attribute, attr); struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; unsigned long mask = con->con_in->used_mask; return bitmap_print_to_pagebuf(true, buf, &mask, cfg->nr_trig_max); } static ssize_t trigout_sig_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ext_attr = container_of(attr, struct dev_ext_attribute, attr); struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); struct cti_config *cfg = &drvdata->config; unsigned long mask = con->con_out->used_mask; return bitmap_print_to_pagebuf(true, buf, &mask, cfg->nr_trig_max); } /* convert a sig type id to a name */ static const char * cti_sig_type_name(struct cti_trig_con *con, int used_count, bool in) { int idx = 0; struct cti_trig_grp *grp = in ? con->con_in : con->con_out; if (used_count < grp->nr_sigs) idx = grp->sig_types[used_count]; return sig_type_names[idx]; } static ssize_t trigin_type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ext_attr = container_of(attr, struct dev_ext_attribute, attr); struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; int sig_idx, used = 0; const char *name; for (sig_idx = 0; sig_idx < con->con_in->nr_sigs; sig_idx++) { name = cti_sig_type_name(con, sig_idx, true); used += sprintf(buf + used, "%s ", name); } used += sprintf(buf + used, "\n"); return used; } static ssize_t trigout_type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ext_attr = container_of(attr, struct dev_ext_attribute, attr); struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; int sig_idx, used = 0; const char *name; for (sig_idx = 0; sig_idx < con->con_out->nr_sigs; sig_idx++) { name = cti_sig_type_name(con, sig_idx, false); used += sprintf(buf + used, "%s ", name); } used += sprintf(buf + used, "\n"); return used; } /* * Array of show function names declared above to allow selection * for the connection attributes */ static p_show_fn show_fns[CTI_CON_ATTR_MAX] = { con_name_show, trigin_sig_show, trigout_sig_show, trigin_type_show, trigout_type_show, }; static int cti_create_con_sysfs_attr(struct device *dev, struct cti_trig_con *con, enum cti_conn_attr_type attr_type, int attr_idx) { struct dev_ext_attribute *eattr; char *name; eattr = devm_kzalloc(dev, sizeof(struct dev_ext_attribute), GFP_KERNEL); if (eattr) { name = devm_kstrdup(dev, con_attr_names[attr_type], GFP_KERNEL); if (name) { /* fill out the underlying attribute struct */ eattr->attr.attr.name = name; eattr->attr.attr.mode = 0444; /* now the device_attribute struct */ eattr->attr.show = show_fns[attr_type]; } else { return -ENOMEM; } } else { return -ENOMEM; } eattr->var = con; con->con_attrs[attr_idx] = &eattr->attr.attr; /* * Initialize the dynamically allocated attribute * to avoid LOCKDEP splat. See include/linux/sysfs.h * for more details. */ sysfs_attr_init(con->con_attrs[attr_idx]); return 0; } static struct attribute_group * cti_create_con_sysfs_group(struct device *dev, struct cti_device *ctidev, int con_idx, struct cti_trig_con *tc) { struct attribute_group *group = NULL; int grp_idx; group = devm_kzalloc(dev, sizeof(struct attribute_group), GFP_KERNEL); if (!group) return NULL; group->name = devm_kasprintf(dev, GFP_KERNEL, "triggers%d", con_idx); if (!group->name) return NULL; grp_idx = con_idx + CORESIGHT_CTI_STATIC_GROUPS_MAX - 1; ctidev->con_groups[grp_idx] = group; tc->attr_group = group; return group; } /* create a triggers connection group and the attributes for that group */ static int cti_create_con_attr_set(struct device *dev, int con_idx, struct cti_device *ctidev, struct cti_trig_con *tc) { struct attribute_group *attr_group = NULL; int attr_idx = 0; int err = -ENOMEM; attr_group = cti_create_con_sysfs_group(dev, ctidev, con_idx, tc); if (!attr_group) return -ENOMEM; /* allocate NULL terminated array of attributes */ tc->con_attrs = devm_kcalloc(dev, CTI_CON_ATTR_MAX + 1, sizeof(struct attribute *), GFP_KERNEL); if (!tc->con_attrs) return -ENOMEM; err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_NAME, attr_idx++); if (err) return err; if (tc->con_in->nr_sigs > 0) { err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_TRIGIN_SIG, attr_idx++); if (err) return err; err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_TRIGIN_TYPES, attr_idx++); if (err) return err; } if (tc->con_out->nr_sigs > 0) { err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_TRIGOUT_SIG, attr_idx++); if (err) return err; err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_TRIGOUT_TYPES, attr_idx++); if (err) return err; } attr_group->attrs = tc->con_attrs; return 0; } /* create the array of group pointers for the CTI sysfs groups */ static int cti_create_cons_groups(struct device *dev, struct cti_device *ctidev) { int nr_groups; /* nr groups = dynamic + static + NULL terminator */ nr_groups = ctidev->nr_trig_con + CORESIGHT_CTI_STATIC_GROUPS_MAX; ctidev->con_groups = devm_kcalloc(dev, nr_groups, sizeof(struct attribute_group *), GFP_KERNEL); if (!ctidev->con_groups) return -ENOMEM; return 0; } int cti_create_cons_sysfs(struct device *dev, struct cti_drvdata *drvdata) { struct cti_device *ctidev = &drvdata->ctidev; int err, con_idx = 0, i; struct cti_trig_con *tc; err = cti_create_cons_groups(dev, ctidev); if (err) return err; /* populate first locations with the static set of groups */ for (i = 0; i < (CORESIGHT_CTI_STATIC_GROUPS_MAX - 1); i++) ctidev->con_groups[i] = coresight_cti_groups[i]; /* add dynamic set for each connection */ list_for_each_entry(tc, &ctidev->trig_cons, node) { err = cti_create_con_attr_set(dev, con_idx++, ctidev, tc); if (err) break; } return err; } /* attribute and group sysfs tables. */ static const struct attribute_group coresight_cti_group = { .attrs = coresight_cti_attrs, }; static const struct attribute_group coresight_cti_mgmt_group = { .attrs = coresight_cti_mgmt_attrs, .name = "mgmt", }; static const struct attribute_group coresight_cti_regs_group = { .attrs = coresight_cti_regs_attrs, .name = "regs", }; static const struct attribute_group coresight_cti_channels_group = { .attrs = coresight_cti_channel_attrs, .name = "channels", }; const struct attribute_group * coresight_cti_groups[CORESIGHT_CTI_STATIC_GROUPS_MAX] = { &coresight_cti_group, &coresight_cti_mgmt_group, &coresight_cti_regs_group, &coresight_cti_channels_group, NULL, };
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