// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright(C) 2015 Linaro Limited. All rights reserved.
 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
 */

#include <linux/pid_namespace.h>
#include <linux/pm_runtime.h>
#include <linux/sysfs.h>
#include "coresight-etm.h"
#include "coresight-priv.h"

static ssize_t nr_addr_cmp_show(struct device *dev,
                                struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

        val = drvdata->nr_addr_cmp;
        return sprintf(buf, "%#lx\n", val);
}
static DEVICE_ATTR_RO(nr_addr_cmp);

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);

        val = drvdata->nr_cntr;
        return sprintf(buf, "%#lx\n", val);
}
static DEVICE_ATTR_RO(nr_cntr);

static ssize_t nr_ctxid_cmp_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

        val = drvdata->nr_ctxid_cmp;
        return sprintf(buf, "%#lx\n", val);
}
static DEVICE_ATTR_RO(nr_ctxid_cmp);

static ssize_t etmsr_show(struct device *dev,
                          struct device_attribute *attr, char *buf)
{
        unsigned long flags, val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

        pm_runtime_get_sync(dev->parent);
        spin_lock_irqsave(&drvdata->spinlock, flags);
        CS_UNLOCK(drvdata->csa.base);

        val = etm_readl(drvdata, ETMSR);

        CS_LOCK(drvdata->csa.base);
        spin_unlock_irqrestore(&drvdata->spinlock, flags);
        pm_runtime_put(dev->parent);

        return sprintf(buf, "%#lx\n", val);
}
static DEVICE_ATTR_RO(etmsr);

static ssize_t reset_store(struct device *dev,
                           struct device_attribute *attr,
                           const char *buf, size_t size)
{
        int i, ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        if (val) {
                spin_lock(&drvdata->spinlock);
                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++) {
                        config->addr_type[i] = ETM_ADDR_TYPE_NONE;
                }

                etm_set_default(config);
                etm_release_trace_id(drvdata);
                spin_unlock(&drvdata->spinlock);
        }

        return size;
}
static DEVICE_ATTR_WO(reset);

static ssize_t mode_show(struct device *dev,
                         struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->mode;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t mode_store(struct device *dev,
                          struct device_attribute *attr,
                          const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->mode = val & ETM_MODE_ALL;

        if (config->mode & ETM_MODE_EXCLUDE)
                config->enable_ctrl1 |= ETMTECR1_INC_EXC;
        else
                config->enable_ctrl1 &= ~ETMTECR1_INC_EXC;

        if (config->mode & ETM_MODE_CYCACC)
                config->ctrl |= ETMCR_CYC_ACC;
        else
                config->ctrl &= ~ETMCR_CYC_ACC;

        if (config->mode & ETM_MODE_STALL) {
                if (!(drvdata->etmccr & ETMCCR_FIFOFULL)) {
                        dev_warn(dev, "stall mode not supported\n");
                        ret = -EINVAL;
                        goto err_unlock;
                }
                config->ctrl |= ETMCR_STALL_MODE;
        } else
                config->ctrl &= ~ETMCR_STALL_MODE;

        if (config->mode & ETM_MODE_TIMESTAMP) {
                if (!(drvdata->etmccer & ETMCCER_TIMESTAMP)) {
                        dev_warn(dev, "timestamp not supported\n");
                        ret = -EINVAL;
                        goto err_unlock;
                }
                config->ctrl |= ETMCR_TIMESTAMP_EN;
        } else
                config->ctrl &= ~ETMCR_TIMESTAMP_EN;

        if (config->mode & ETM_MODE_CTXID)
                config->ctrl |= ETMCR_CTXID_SIZE;
        else
                config->ctrl &= ~ETMCR_CTXID_SIZE;

        if (config->mode & ETM_MODE_BBROAD)
                config->ctrl |= ETMCR_BRANCH_BROADCAST;
        else
                config->ctrl &= ~ETMCR_BRANCH_BROADCAST;

        if (config->mode & ETM_MODE_RET_STACK)
                config->ctrl |= ETMCR_RETURN_STACK;
        else
                config->ctrl &= ~ETMCR_RETURN_STACK;

        if (config->mode & (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER))
                etm_config_trace_mode(config);

        spin_unlock(&drvdata->spinlock);

        return size;

err_unlock:
        spin_unlock(&drvdata->spinlock);
        return ret;
}
static DEVICE_ATTR_RW(mode);

static ssize_t trigger_event_show(struct device *dev,
                                  struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->trigger_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t trigger_event_store(struct device *dev,
                                   struct device_attribute *attr,
                                   const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->trigger_event = val & ETM_EVENT_MASK;

        return size;
}
static DEVICE_ATTR_RW(trigger_event);

static ssize_t enable_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->enable_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t enable_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->enable_event = val & ETM_EVENT_MASK;

        return size;
}
static DEVICE_ATTR_RW(enable_event);

static ssize_t fifofull_level_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->fifofull_level;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t fifofull_level_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->fifofull_level = val;

        return size;
}
static DEVICE_ATTR_RW(fifofull_level);

static ssize_t addr_idx_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->addr_idx;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t addr_idx_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

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

        /*
         * Use spinlock to ensure index doesn't change while it gets
         * dereferenced multiple times within a spinlock block elsewhere.
         */
        spin_lock(&drvdata->spinlock);
        config->addr_idx = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_idx);

static ssize_t addr_single_show(struct device *dev,
                                struct device_attribute *attr, char *buf)
{
        u8 idx;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
                spin_unlock(&drvdata->spinlock);
                return -EINVAL;
        }

        val = config->addr_val[idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t addr_single_store(struct device *dev,
                                 struct device_attribute *attr,
                                 const char *buf, size_t size)
{
        u8 idx;
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
                spin_unlock(&drvdata->spinlock);
                return -EINVAL;
        }

        config->addr_val[idx] = val;
        config->addr_type[idx] = ETM_ADDR_TYPE_SINGLE;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_single);

static ssize_t addr_range_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        u8 idx;
        unsigned long val1, val2;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (idx % 2 != 0) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }
        if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
               config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
              (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
               config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        val1 = config->addr_val[idx];
        val2 = config->addr_val[idx + 1];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx %#lx\n", val1, val2);
}

static ssize_t addr_range_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t size)
{
        u8 idx;
        unsigned long val1, val2;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        if (sscanf(buf, "%lx %lx", &val1, &val2) != 2)
                return -EINVAL;
        /* Lower address comparator cannot have a higher address value */
        if (val1 > val2)
                return -EINVAL;

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (idx % 2 != 0) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }
        if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
               config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
              (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
               config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        config->addr_val[idx] = val1;
        config->addr_type[idx] = ETM_ADDR_TYPE_RANGE;
        config->addr_val[idx + 1] = val2;
        config->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE;
        config->enable_ctrl1 |= (1 << (idx/2));
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_range);

static ssize_t addr_start_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        u8 idx;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_START)) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        val = config->addr_val[idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t addr_start_store(struct device *dev,
                                struct device_attribute *attr,
                                const char *buf, size_t size)
{
        u8 idx;
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_START)) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        config->addr_val[idx] = val;
        config->addr_type[idx] = ETM_ADDR_TYPE_START;
        config->startstop_ctrl |= (1 << idx);
        config->enable_ctrl1 |= ETMTECR1_START_STOP;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_start);

static ssize_t addr_stop_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        u8 idx;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        val = config->addr_val[idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t addr_stop_store(struct device *dev,
                               struct device_attribute *attr,
                               const char *buf, size_t size)
{
        u8 idx;
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        idx = config->addr_idx;
        if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
              config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
                spin_unlock(&drvdata->spinlock);
                return -EPERM;
        }

        config->addr_val[idx] = val;
        config->addr_type[idx] = ETM_ADDR_TYPE_STOP;
        config->startstop_ctrl |= (1 << (idx + 16));
        config->enable_ctrl1 |= ETMTECR1_START_STOP;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_stop);

static ssize_t addr_acctype_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        val = config->addr_acctype[config->addr_idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t addr_acctype_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->addr_acctype[config->addr_idx] = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(addr_acctype);

static ssize_t cntr_idx_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->cntr_idx;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t cntr_idx_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        if (val >= drvdata->nr_cntr)
                return -EINVAL;
        /*
         * Use spinlock to ensure index doesn't change while it gets
         * dereferenced multiple times within a spinlock block elsewhere.
         */
        spin_lock(&drvdata->spinlock);
        config->cntr_idx = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(cntr_idx);

static ssize_t cntr_rld_val_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        val = config->cntr_rld_val[config->cntr_idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t cntr_rld_val_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->cntr_rld_val[config->cntr_idx] = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(cntr_rld_val);

static ssize_t cntr_event_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        val = config->cntr_event[config->cntr_idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t cntr_event_store(struct device *dev,
                                struct device_attribute *attr,
                                const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->cntr_event[config->cntr_idx] = val & ETM_EVENT_MASK;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(cntr_event);

static ssize_t cntr_rld_event_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        spin_lock(&drvdata->spinlock);
        val = config->cntr_rld_event[config->cntr_idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t cntr_rld_event_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->cntr_rld_event[config->cntr_idx] = val & ETM_EVENT_MASK;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(cntr_rld_event);

static ssize_t cntr_val_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        int i, ret = 0;
        u32 val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        if (!coresight_get_mode(drvdata->csdev)) {
                spin_lock(&drvdata->spinlock);
                for (i = 0; i < drvdata->nr_cntr; i++)
                        ret += sprintf(buf, "counter %d: %x\n",
                                       i, config->cntr_val[i]);
                spin_unlock(&drvdata->spinlock);
                return ret;
        }

        for (i = 0; i < drvdata->nr_cntr; i++) {
                val = etm_readl(drvdata, ETMCNTVRn(i));
                ret += sprintf(buf, "counter %d: %x\n", i, val);
        }

        return ret;
}

static ssize_t cntr_val_store(struct device *dev,
                              struct device_attribute *attr,
                              const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        spin_lock(&drvdata->spinlock);
        config->cntr_val[config->cntr_idx] = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(cntr_val);

static ssize_t seq_12_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_12_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_12_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_12_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_12_event);

static ssize_t seq_21_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_21_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_21_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_21_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_21_event);

static ssize_t seq_23_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_23_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_23_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_23_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_23_event);

static ssize_t seq_31_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_31_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_31_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_31_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_31_event);

static ssize_t seq_32_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_32_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_32_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_32_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_32_event);

static ssize_t seq_13_event_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->seq_13_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_13_event_store(struct device *dev,
                                  struct device_attribute *attr,
                                  const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->seq_13_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(seq_13_event);

static ssize_t seq_curr_state_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        unsigned long val, flags;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        if (!coresight_get_mode(drvdata->csdev)) {
                val = config->seq_curr_state;
                goto out;
        }

        pm_runtime_get_sync(dev->parent);
        spin_lock_irqsave(&drvdata->spinlock, flags);

        CS_UNLOCK(drvdata->csa.base);
        val = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
        CS_LOCK(drvdata->csa.base);

        spin_unlock_irqrestore(&drvdata->spinlock, flags);
        pm_runtime_put(dev->parent);
out:
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t seq_curr_state_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        if (val > ETM_SEQ_STATE_MAX_VAL)
                return -EINVAL;

        config->seq_curr_state = val;

        return size;
}
static DEVICE_ATTR_RW(seq_curr_state);

static ssize_t ctxid_idx_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->ctxid_idx;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t ctxid_idx_store(struct device *dev,
                                struct device_attribute *attr,
                                const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

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

        /*
         * Use spinlock to ensure index doesn't change while it gets
         * dereferenced multiple times within a spinlock block elsewhere.
         */
        spin_lock(&drvdata->spinlock);
        config->ctxid_idx = val;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(ctxid_idx);

static ssize_t ctxid_pid_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        /*
         * Don't use contextID tracing if coming from a PID namespace.  See
         * comment in ctxid_pid_store().
         */
        if (task_active_pid_ns(current) != &init_pid_ns)
                return -EINVAL;

        spin_lock(&drvdata->spinlock);
        val = config->ctxid_pid[config->ctxid_idx];
        spin_unlock(&drvdata->spinlock);

        return sprintf(buf, "%#lx\n", val);
}

static ssize_t ctxid_pid_store(struct device *dev,
                               struct device_attribute *attr,
                               const char *buf, size_t size)
{
        int ret;
        unsigned long pid;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        /*
         * When contextID tracing is enabled the tracers will insert the
         * value found in the contextID register in the trace stream.  But if
         * a process is in a namespace the PID of that process as seen from the
         * namespace won't be what the kernel sees, something that makes the
         * feature confusing and can potentially leak kernel only information.
         * As such refuse to use the feature if @current is not in the initial
         * PID namespace.
         */
        if (task_active_pid_ns(current) != &init_pid_ns)
                return -EINVAL;

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

        spin_lock(&drvdata->spinlock);
        config->ctxid_pid[config->ctxid_idx] = pid;
        spin_unlock(&drvdata->spinlock);

        return size;
}
static DEVICE_ATTR_RW(ctxid_pid);

static ssize_t ctxid_mask_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        /*
         * Don't use contextID tracing if coming from a PID namespace.  See
         * comment in ctxid_pid_store().
         */
        if (task_active_pid_ns(current) != &init_pid_ns)
                return -EINVAL;

        val = config->ctxid_mask;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t ctxid_mask_store(struct device *dev,
                                struct device_attribute *attr,
                                const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        /*
         * Don't use contextID tracing if coming from a PID namespace.  See
         * comment in ctxid_pid_store().
         */
        if (task_active_pid_ns(current) != &init_pid_ns)
                return -EINVAL;

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

        config->ctxid_mask = val;
        return size;
}
static DEVICE_ATTR_RW(ctxid_mask);

static ssize_t sync_freq_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->sync_freq;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t sync_freq_store(struct device *dev,
                               struct device_attribute *attr,
                               const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->sync_freq = val & ETM_SYNC_MASK;
        return size;
}
static DEVICE_ATTR_RW(sync_freq);

static ssize_t timestamp_event_show(struct device *dev,
                                    struct device_attribute *attr, char *buf)
{
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

        val = config->timestamp_event;
        return sprintf(buf, "%#lx\n", val);
}

static ssize_t timestamp_event_store(struct device *dev,
                                     struct device_attribute *attr,
                                     const char *buf, size_t size)
{
        int ret;
        unsigned long val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        struct etm_config *config = &drvdata->config;

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

        config->timestamp_event = val & ETM_EVENT_MASK;
        return size;
}
static DEVICE_ATTR_RW(timestamp_event);

static ssize_t cpu_show(struct device *dev,
                        struct device_attribute *attr, char *buf)
{
        int val;
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);

        val = drvdata->cpu;
        return scnprintf(buf, PAGE_SIZE, "%d\n", val);

}
static DEVICE_ATTR_RO(cpu);

static ssize_t traceid_show(struct device *dev,
                            struct device_attribute *attr, char *buf)
{
        struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
        int trace_id = coresight_etm_get_trace_id(drvdata->csdev, CS_MODE_SYSFS, NULL);

        if (trace_id < 0)
                return trace_id;

        return sysfs_emit(buf, "%#x\n", trace_id);
}
static DEVICE_ATTR_RO(traceid);

static struct attribute *coresight_etm_attrs[] = {
        &dev_attr_nr_addr_cmp.attr,
        &dev_attr_nr_cntr.attr,
        &dev_attr_nr_ctxid_cmp.attr,
        &dev_attr_etmsr.attr,
        &dev_attr_reset.attr,
        &dev_attr_mode.attr,
        &dev_attr_trigger_event.attr,
        &dev_attr_enable_event.attr,
        &dev_attr_fifofull_level.attr,
        &dev_attr_addr_idx.attr,
        &dev_attr_addr_single.attr,
        &dev_attr_addr_range.attr,
        &dev_attr_addr_start.attr,
        &dev_attr_addr_stop.attr,
        &dev_attr_addr_acctype.attr,
        &dev_attr_cntr_idx.attr,
        &dev_attr_cntr_rld_val.attr,
        &dev_attr_cntr_event.attr,
        &dev_attr_cntr_rld_event.attr,
        &dev_attr_cntr_val.attr,
        &dev_attr_seq_12_event.attr,
        &dev_attr_seq_21_event.attr,
        &dev_attr_seq_23_event.attr,
        &dev_attr_seq_31_event.attr,
        &dev_attr_seq_32_event.attr,
        &dev_attr_seq_13_event.attr,
        &dev_attr_seq_curr_state.attr,
        &dev_attr_ctxid_idx.attr,
        &dev_attr_ctxid_pid.attr,
        &dev_attr_ctxid_mask.attr,
        &dev_attr_sync_freq.attr,
        &dev_attr_timestamp_event.attr,
        &dev_attr_traceid.attr,
        &dev_attr_cpu.attr,
        NULL,
};

static struct attribute *coresight_etm_mgmt_attrs[] = {
        coresight_simple_reg32(etmccr, ETMCCR),
        coresight_simple_reg32(etmccer, ETMCCER),
        coresight_simple_reg32(etmscr, ETMSCR),
        coresight_simple_reg32(etmidr, ETMIDR),
        coresight_simple_reg32(etmcr, ETMCR),
        coresight_simple_reg32(etmtraceidr, ETMTRACEIDR),
        coresight_simple_reg32(etmteevr, ETMTEEVR),
        coresight_simple_reg32(etmtssvr, ETMTSSCR),
        coresight_simple_reg32(etmtecr1, ETMTECR1),
        coresight_simple_reg32(etmtecr2, ETMTECR2),
        NULL,
};

static const struct attribute_group coresight_etm_group = {
        .attrs = coresight_etm_attrs,
};

static const struct attribute_group coresight_etm_mgmt_group = {
        .attrs = coresight_etm_mgmt_attrs,
        .name = "mgmt",
};

const struct attribute_group *coresight_etm_groups[] = {
        &coresight_etm_group,
        &coresight_etm_mgmt_group,
        NULL,
};