| /* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/io.h> |
| #include <linux/err.h> |
| #include <linux/fs.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/smp.h> |
| #include <linux/wakelock.h> |
| #include <linux/pm_qos.h> |
| #include <linux/sysfs.h> |
| #include <linux/stat.h> |
| #include <linux/mutex.h> |
| #include <linux/clk.h> |
| #include <linux/of_coresight.h> |
| #include <linux/coresight.h> |
| #include <asm/sections.h> |
| #include <mach/socinfo.h> |
| |
| #include "coresight-priv.h" |
| |
| #define etm_writel(drvdata, val, off) \ |
| __raw_writel((val), drvdata->base + off) |
| #define etm_readl(drvdata, off) \ |
| __raw_readl(drvdata->base + off) |
| |
| #define ETM_LOCK(drvdata) \ |
| do { \ |
| mb(); \ |
| etm_writel(drvdata, 0x0, CORESIGHT_LAR); \ |
| } while (0) |
| #define ETM_UNLOCK(drvdata) \ |
| do { \ |
| etm_writel(drvdata, CORESIGHT_UNLOCK, CORESIGHT_LAR); \ |
| mb(); \ |
| } while (0) |
| |
| /* |
| * Device registers: |
| * 0x000 - 0x2FC: Trace registers |
| * 0x300 - 0x314: Management registers |
| * 0x318 - 0xEFC: Trace registers |
| * |
| * Coresight registers |
| * 0xF00 - 0xF9C: Management registers |
| * 0xFA0 - 0xFA4: Management registers in PFTv1.0 |
| * Trace registers in PFTv1.1 |
| * 0xFA8 - 0xFFC: Management registers |
| */ |
| |
| /* Trace registers (0x000-0x2FC) */ |
| #define ETMCR (0x000) |
| #define ETMCCR (0x004) |
| #define ETMTRIGGER (0x008) |
| #define ETMSR (0x010) |
| #define ETMSCR (0x014) |
| #define ETMTSSCR (0x018) |
| #define ETMTEEVR (0x020) |
| #define ETMTECR1 (0x024) |
| #define ETMFFLR (0x02C) |
| #define ETMACVRn(n) (0x040 + (n * 4)) |
| #define ETMACTRn(n) (0x080 + (n * 4)) |
| #define ETMCNTRLDVRn(n) (0x140 + (n * 4)) |
| #define ETMCNTENRn(n) (0x150 + (n * 4)) |
| #define ETMCNTRLDEVRn(n) (0x160 + (n * 4)) |
| #define ETMCNTVRn(n) (0x170 + (n * 4)) |
| #define ETMSQ12EVR (0x180) |
| #define ETMSQ21EVR (0x184) |
| #define ETMSQ23EVR (0x188) |
| #define ETMSQ31EVR (0x18C) |
| #define ETMSQ32EVR (0x190) |
| #define ETMSQ13EVR (0x194) |
| #define ETMSQR (0x19C) |
| #define ETMEXTOUTEVRn(n) (0x1A0 + (n * 4)) |
| #define ETMCIDCVRn(n) (0x1B0 + (n * 4)) |
| #define ETMCIDCMR (0x1BC) |
| #define ETMIMPSPEC0 (0x1C0) |
| #define ETMIMPSPEC1 (0x1C4) |
| #define ETMIMPSPEC2 (0x1C8) |
| #define ETMIMPSPEC3 (0x1CC) |
| #define ETMIMPSPEC4 (0x1D0) |
| #define ETMIMPSPEC5 (0x1D4) |
| #define ETMIMPSPEC6 (0x1D8) |
| #define ETMIMPSPEC7 (0x1DC) |
| #define ETMSYNCFR (0x1E0) |
| #define ETMIDR (0x1E4) |
| #define ETMCCER (0x1E8) |
| #define ETMEXTINSELR (0x1EC) |
| #define ETMTESSEICR (0x1F0) |
| #define ETMEIBCR (0x1F4) |
| #define ETMTSEVR (0x1F8) |
| #define ETMAUXCR (0x1FC) |
| #define ETMTRACEIDR (0x200) |
| #define ETMVMIDCVR (0x240) |
| /* Management registers (0x300-0x314) */ |
| #define ETMOSLAR (0x300) |
| #define ETMOSLSR (0x304) |
| #define ETMOSSRR (0x308) |
| #define ETMPDCR (0x310) |
| #define ETMPDSR (0x314) |
| |
| #define ETM_MAX_ADDR_CMP (16) |
| #define ETM_MAX_CNTR (4) |
| #define ETM_MAX_CTXID_CMP (3) |
| |
| #define ETM_MODE_EXCLUDE BIT(0) |
| #define ETM_MODE_CYCACC BIT(1) |
| #define ETM_MODE_STALL BIT(2) |
| #define ETM_MODE_TIMESTAMP BIT(3) |
| #define ETM_MODE_CTXID BIT(4) |
| #define ETM_MODE_ALL (0x1F) |
| |
| #define ETM_EVENT_MASK (0x1FFFF) |
| #define ETM_SYNC_MASK (0xFFF) |
| #define ETM_ALL_MASK (0xFFFFFFFF) |
| |
| #define ETM_SEQ_STATE_MAX_VAL (0x2) |
| |
| enum etm_addr_type { |
| ETM_ADDR_TYPE_NONE, |
| ETM_ADDR_TYPE_SINGLE, |
| ETM_ADDR_TYPE_RANGE, |
| ETM_ADDR_TYPE_START, |
| ETM_ADDR_TYPE_STOP, |
| }; |
| |
| #ifdef CONFIG_MSM_QDSS_ETM_DEFAULT_ENABLE |
| static int boot_enable = 1; |
| #else |
| static int boot_enable; |
| #endif |
| module_param_named( |
| boot_enable, boot_enable, int, S_IRUGO |
| ); |
| |
| struct etm_drvdata { |
| void __iomem *base; |
| struct device *dev; |
| struct coresight_device *csdev; |
| struct clk *clk; |
| struct mutex mutex; |
| struct wake_lock wake_lock; |
| struct pm_qos_request qos_req; |
| int cpu; |
| uint8_t arch; |
| uint8_t nr_addr_cmp; |
| uint8_t nr_cntr; |
| uint8_t nr_ext_inp; |
| uint8_t nr_ext_out; |
| uint8_t nr_ctxid_cmp; |
| uint8_t reset; |
| uint32_t mode; |
| uint32_t ctrl; |
| uint32_t trigger_event; |
| uint32_t startstop_ctrl; |
| uint32_t enable_event; |
| uint32_t enable_ctrl1; |
| uint32_t fifofull_level; |
| uint8_t addr_idx; |
| uint32_t addr_val[ETM_MAX_ADDR_CMP]; |
| uint32_t addr_acctype[ETM_MAX_ADDR_CMP]; |
| uint32_t addr_type[ETM_MAX_ADDR_CMP]; |
| uint8_t cntr_idx; |
| uint32_t cntr_rld_val[ETM_MAX_CNTR]; |
| uint32_t cntr_event[ETM_MAX_CNTR]; |
| uint32_t cntr_rld_event[ETM_MAX_CNTR]; |
| uint32_t cntr_val[ETM_MAX_CNTR]; |
| uint32_t seq_12_event; |
| uint32_t seq_21_event; |
| uint32_t seq_23_event; |
| uint32_t seq_31_event; |
| uint32_t seq_32_event; |
| uint32_t seq_13_event; |
| uint32_t seq_curr_state; |
| uint8_t ctxid_idx; |
| uint32_t ctxid_val[ETM_MAX_CTXID_CMP]; |
| uint32_t ctxid_mask; |
| uint32_t sync_freq; |
| uint32_t timestamp_event; |
| }; |
| |
| /* ETM clock is derived from the processor clock and gets enabled on a |
| * logical OR of below items on Krait (pass2 onwards): |
| * 1.CPMR[ETMCLKEN] is 1 |
| * 2.ETMCR[PD] is 0 |
| * 3.ETMPDCR[PU] is 1 |
| * 4.Reset is asserted (core or debug) |
| * 5.APB memory mapped requests (eg. EDAP access) |
| * |
| * 1., 2. and 3. above are permanent enables whereas 4. and 5. are temporary |
| * enables |
| * |
| * We rely on 5. to be able to access ETMCR and then use 2. above for ETM |
| * clock vote in the driver and the save-restore code uses 1. above |
| * for its vote |
| */ |
| static void etm_set_pwrdwn(struct etm_drvdata *drvdata) |
| { |
| uint32_t etmcr; |
| |
| etmcr = etm_readl(drvdata, ETMCR); |
| etmcr |= BIT(0); |
| etm_writel(drvdata, etmcr, ETMCR); |
| } |
| |
| static void etm_clr_pwrdwn(struct etm_drvdata *drvdata) |
| { |
| uint32_t etmcr; |
| |
| etmcr = etm_readl(drvdata, ETMCR); |
| etmcr &= ~BIT(0); |
| etm_writel(drvdata, etmcr, ETMCR); |
| } |
| |
| static void etm_set_prog(struct etm_drvdata *drvdata) |
| { |
| uint32_t etmcr; |
| int count; |
| |
| etmcr = etm_readl(drvdata, ETMCR); |
| etmcr |= BIT(10); |
| etm_writel(drvdata, etmcr, ETMCR); |
| for (count = TIMEOUT_US; BVAL(etm_readl(drvdata, ETMSR), 1) != 1 |
| && count > 0; count--) |
| udelay(1); |
| WARN(count == 0, "timeout while setting prog bit, ETMSR: %#x\n", |
| etm_readl(drvdata, ETMSR)); |
| } |
| |
| static void etm_clr_prog(struct etm_drvdata *drvdata) |
| { |
| uint32_t etmcr; |
| int count; |
| |
| etmcr = etm_readl(drvdata, ETMCR); |
| etmcr &= ~BIT(10); |
| etm_writel(drvdata, etmcr, ETMCR); |
| for (count = TIMEOUT_US; BVAL(etm_readl(drvdata, ETMSR), 1) != 0 |
| && count > 0; count--) |
| udelay(1); |
| WARN(count == 0, "timeout while clearing prog bit, ETMSR: %#x\n", |
| etm_readl(drvdata, ETMSR)); |
| } |
| |
| static void __etm_enable(struct etm_drvdata *drvdata) |
| { |
| int i; |
| |
| ETM_UNLOCK(drvdata); |
| /* Vote for ETM power/clock enable */ |
| etm_clr_pwrdwn(drvdata); |
| etm_set_prog(drvdata); |
| |
| etm_writel(drvdata, drvdata->ctrl | BIT(10), ETMCR); |
| etm_writel(drvdata, drvdata->trigger_event, ETMTRIGGER); |
| etm_writel(drvdata, drvdata->startstop_ctrl, ETMTSSCR); |
| etm_writel(drvdata, drvdata->enable_event, ETMTEEVR); |
| etm_writel(drvdata, drvdata->enable_ctrl1, ETMTECR1); |
| etm_writel(drvdata, drvdata->fifofull_level, ETMFFLR); |
| for (i = 0; i < drvdata->nr_addr_cmp; i++) { |
| etm_writel(drvdata, drvdata->addr_val[i], ETMACVRn(i)); |
| etm_writel(drvdata, drvdata->addr_acctype[i], ETMACTRn(i)); |
| } |
| for (i = 0; i < drvdata->nr_cntr; i++) { |
| etm_writel(drvdata, drvdata->cntr_rld_val[i], ETMCNTRLDVRn(i)); |
| etm_writel(drvdata, drvdata->cntr_event[i], ETMCNTENRn(i)); |
| etm_writel(drvdata, drvdata->cntr_rld_event[i], |
| ETMCNTRLDEVRn(i)); |
| etm_writel(drvdata, drvdata->cntr_val[i], ETMCNTVRn(i)); |
| } |
| etm_writel(drvdata, drvdata->seq_12_event, ETMSQ12EVR); |
| etm_writel(drvdata, drvdata->seq_21_event, ETMSQ21EVR); |
| etm_writel(drvdata, drvdata->seq_23_event, ETMSQ23EVR); |
| etm_writel(drvdata, drvdata->seq_31_event, ETMSQ31EVR); |
| etm_writel(drvdata, drvdata->seq_32_event, ETMSQ32EVR); |
| etm_writel(drvdata, drvdata->seq_13_event, ETMSQ13EVR); |
| etm_writel(drvdata, drvdata->seq_curr_state, ETMSQR); |
| for (i = 0; i < drvdata->nr_ext_out; i++) |
| etm_writel(drvdata, 0x0000406F, ETMEXTOUTEVRn(i)); |
| for (i = 0; i < drvdata->nr_ctxid_cmp; i++) |
| etm_writel(drvdata, drvdata->ctxid_val[i], ETMCIDCVRn(i)); |
| etm_writel(drvdata, drvdata->ctxid_mask, ETMCIDCMR); |
| etm_writel(drvdata, drvdata->sync_freq, ETMSYNCFR); |
| etm_writel(drvdata, 0x00000000, ETMEXTINSELR); |
| etm_writel(drvdata, drvdata->timestamp_event, ETMTSEVR); |
| etm_writel(drvdata, 0x00000000, ETMAUXCR); |
| etm_writel(drvdata, drvdata->cpu + 1, ETMTRACEIDR); |
| etm_writel(drvdata, 0x00000000, ETMVMIDCVR); |
| |
| etm_clr_prog(drvdata); |
| ETM_LOCK(drvdata); |
| } |
| |
| static int etm_enable(struct coresight_device *csdev) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| int ret; |
| |
| wake_lock(&drvdata->wake_lock); |
| /* 1. causes all online cpus to come out of idle PC |
| * 2. prevents idle PC until save restore flag is enabled atomically |
| * |
| * we rely on the user to prevent hotplug on/off racing with this |
| * operation and to ensure cores where trace is expected to be turned |
| * on are already hotplugged on |
| */ |
| pm_qos_update_request(&drvdata->qos_req, 0); |
| |
| ret = clk_prepare_enable(drvdata->clk); |
| if (ret) |
| goto err_clk; |
| |
| mutex_lock(&drvdata->mutex); |
| __etm_enable(drvdata); |
| mutex_unlock(&drvdata->mutex); |
| |
| pm_qos_update_request(&drvdata->qos_req, PM_QOS_DEFAULT_VALUE); |
| wake_unlock(&drvdata->wake_lock); |
| |
| dev_info(drvdata->dev, "ETM tracing enabled\n"); |
| return 0; |
| err_clk: |
| pm_qos_update_request(&drvdata->qos_req, PM_QOS_DEFAULT_VALUE); |
| wake_unlock(&drvdata->wake_lock); |
| return ret; |
| } |
| |
| static void __etm_disable(struct etm_drvdata *drvdata) |
| { |
| ETM_UNLOCK(drvdata); |
| etm_set_prog(drvdata); |
| |
| /* program trace enable to low by using always false event */ |
| etm_writel(drvdata, 0x6F | BIT(14), ETMTEEVR); |
| |
| /* Vote for ETM power/clock disable */ |
| etm_set_pwrdwn(drvdata); |
| ETM_LOCK(drvdata); |
| } |
| |
| static void etm_disable(struct coresight_device *csdev) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| |
| wake_lock(&drvdata->wake_lock); |
| /* 1. causes all online cpus to come out of idle PC |
| * 2. prevents idle PC until save restore flag is disabled atomically |
| * |
| * we rely on the user to prevent hotplug on/off racing with this |
| * operation and to ensure cores where trace is expected to be turned |
| * off are already hotplugged on |
| */ |
| pm_qos_update_request(&drvdata->qos_req, 0); |
| |
| mutex_lock(&drvdata->mutex); |
| __etm_disable(drvdata); |
| mutex_unlock(&drvdata->mutex); |
| |
| clk_disable_unprepare(drvdata->clk); |
| |
| pm_qos_update_request(&drvdata->qos_req, PM_QOS_DEFAULT_VALUE); |
| wake_unlock(&drvdata->wake_lock); |
| |
| dev_info(drvdata->dev, "ETM tracing disabled\n"); |
| } |
| |
| static const struct coresight_ops_source etm_source_ops = { |
| .enable = etm_enable, |
| .disable = etm_disable, |
| }; |
| |
| static const struct coresight_ops etm_cs_ops = { |
| .source_ops = &etm_source_ops, |
| }; |
| |
| static ssize_t etm_show_nr_addr_cmp(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->nr_addr_cmp; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| static DEVICE_ATTR(nr_addr_cmp, S_IRUGO, etm_show_nr_addr_cmp, NULL); |
| |
| static ssize_t etm_show_nr_cntr(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->nr_cntr; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| static DEVICE_ATTR(nr_cntr, S_IRUGO, etm_show_nr_cntr, NULL); |
| |
| static ssize_t etm_show_nr_ctxid_cmp(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->nr_ctxid_cmp; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| static DEVICE_ATTR(nr_ctxid_cmp, S_IRUGO, etm_show_nr_ctxid_cmp, NULL); |
| |
| static ssize_t etm_show_reset(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->reset; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| /* Reset to trace everything i.e. exclude nothing. */ |
| static ssize_t etm_store_reset(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| int i; |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| if (val) { |
| drvdata->mode = ETM_MODE_EXCLUDE; |
| drvdata->ctrl = 0x0; |
| if (cpu_is_krait_v1()) { |
| drvdata->mode |= ETM_MODE_CYCACC; |
| drvdata->ctrl |= BIT(12); |
| } |
| drvdata->trigger_event = 0x406F; |
| drvdata->startstop_ctrl = 0x0; |
| drvdata->enable_event = 0x6F; |
| drvdata->enable_ctrl1 = 0x1000000; |
| drvdata->fifofull_level = 0x28; |
| drvdata->addr_idx = 0x0; |
| for (i = 0; i < drvdata->nr_addr_cmp; i++) { |
| drvdata->addr_val[i] = 0x0; |
| drvdata->addr_acctype[i] = 0x0; |
| drvdata->addr_type[i] = ETM_ADDR_TYPE_NONE; |
| } |
| drvdata->cntr_idx = 0x0; |
| for (i = 0; i < drvdata->nr_cntr; i++) { |
| drvdata->cntr_rld_val[i] = 0x0; |
| drvdata->cntr_event[i] = 0x406F; |
| drvdata->cntr_rld_event[i] = 0x406F; |
| drvdata->cntr_val[i] = 0x0; |
| } |
| drvdata->seq_12_event = 0x406F; |
| drvdata->seq_21_event = 0x406F; |
| drvdata->seq_23_event = 0x406F; |
| drvdata->seq_31_event = 0x406F; |
| drvdata->seq_32_event = 0x406F; |
| drvdata->seq_13_event = 0x406F; |
| drvdata->seq_curr_state = 0x0; |
| drvdata->ctxid_idx = 0x0; |
| for (i = 0; i < drvdata->nr_ctxid_cmp; i++) |
| drvdata->ctxid_val[i] = 0x0; |
| drvdata->ctxid_mask = 0x0; |
| /* Bits[7:0] of ETMSYNCFR are reserved on Krait pass3 onwards */ |
| if (cpu_is_krait() && !cpu_is_krait_v1() && !cpu_is_krait_v2()) |
| drvdata->sync_freq = 0x100; |
| else |
| drvdata->sync_freq = 0x80; |
| drvdata->timestamp_event = 0x406F; |
| } |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(reset, S_IRUGO | S_IWUSR, etm_show_reset, etm_store_reset); |
| |
| static ssize_t etm_show_mode(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->mode; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_mode(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->mode = val & ETM_MODE_ALL; |
| |
| if (drvdata->mode & ETM_MODE_EXCLUDE) |
| drvdata->enable_ctrl1 |= BIT(24); |
| else |
| drvdata->enable_ctrl1 &= ~BIT(24); |
| |
| if (drvdata->mode & ETM_MODE_CYCACC) |
| drvdata->ctrl |= BIT(12); |
| else |
| drvdata->ctrl &= ~BIT(12); |
| |
| if (drvdata->mode & ETM_MODE_STALL) |
| drvdata->ctrl |= BIT(7); |
| else |
| drvdata->ctrl &= ~BIT(7); |
| |
| if (drvdata->mode & ETM_MODE_TIMESTAMP) |
| drvdata->ctrl |= BIT(28); |
| else |
| drvdata->ctrl &= ~BIT(28); |
| |
| if (drvdata->mode & ETM_MODE_CTXID) |
| drvdata->ctrl |= (BIT(14) | BIT(15)); |
| else |
| drvdata->ctrl &= ~(BIT(14) | BIT(15)); |
| mutex_unlock(&drvdata->mutex); |
| |
| return size; |
| } |
| static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, etm_show_mode, etm_store_mode); |
| |
| static ssize_t etm_show_trigger_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->trigger_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_trigger_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->trigger_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(trigger_event, S_IRUGO | S_IWUSR, etm_show_trigger_event, |
| etm_store_trigger_event); |
| |
| static ssize_t etm_show_enable_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->enable_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_enable_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->enable_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(enable_event, S_IRUGO | S_IWUSR, etm_show_enable_event, |
| etm_store_enable_event); |
| |
| static ssize_t etm_show_fifofull_level(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->fifofull_level; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_fifofull_level(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->fifofull_level = val; |
| return size; |
| } |
| static DEVICE_ATTR(fifofull_level, S_IRUGO | S_IWUSR, etm_show_fifofull_level, |
| etm_store_fifofull_level); |
| |
| static ssize_t etm_show_addr_idx(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->addr_idx; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_addr_idx(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| if (val >= drvdata->nr_addr_cmp) |
| return -EINVAL; |
| |
| /* Use mutex to ensure index doesn't change while it gets dereferenced |
| * multiple times within a mutex block elsewhere. |
| */ |
| mutex_lock(&drvdata->mutex); |
| drvdata->addr_idx = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_idx, S_IRUGO | S_IWUSR, etm_show_addr_idx, |
| etm_store_addr_idx); |
| |
| static ssize_t etm_show_addr_single(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| val = drvdata->addr_val[idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_addr_single(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| drvdata->addr_val[idx] = val; |
| drvdata->addr_type[idx] = ETM_ADDR_TYPE_SINGLE; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_single, S_IRUGO | S_IWUSR, etm_show_addr_single, |
| etm_store_addr_single); |
| |
| static ssize_t etm_show_addr_range(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val1, val2; |
| uint8_t idx; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (idx % 2 != 0) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && |
| drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || |
| (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && |
| drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| val1 = drvdata->addr_val[idx]; |
| val2 = drvdata->addr_val[idx + 1]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx %#lx\n", val1, val2); |
| } |
| |
| static ssize_t etm_store_addr_range(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val1, val2; |
| uint8_t idx; |
| |
| if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) |
| return -EINVAL; |
| /* lower address comparator cannot have a higher address value */ |
| if (val1 > val2) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (idx % 2 != 0) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE && |
| drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) || |
| (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE && |
| drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| drvdata->addr_val[idx] = val1; |
| drvdata->addr_type[idx] = ETM_ADDR_TYPE_RANGE; |
| drvdata->addr_val[idx + 1] = val2; |
| drvdata->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE; |
| drvdata->enable_ctrl1 |= (1 << (idx/2)); |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_range, S_IRUGO | S_IWUSR, etm_show_addr_range, |
| etm_store_addr_range); |
| |
| static ssize_t etm_show_addr_start(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| val = drvdata->addr_val[idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_addr_start(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| drvdata->addr_val[idx] = val; |
| drvdata->addr_type[idx] = ETM_ADDR_TYPE_START; |
| drvdata->startstop_ctrl |= (1 << idx); |
| drvdata->enable_ctrl1 |= BIT(25); |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_start, S_IRUGO | S_IWUSR, etm_show_addr_start, |
| etm_store_addr_start); |
| |
| static ssize_t etm_show_addr_stop(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| val = drvdata->addr_val[idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_addr_stop(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| uint8_t idx; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| idx = drvdata->addr_idx; |
| if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE || |
| drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) { |
| mutex_unlock(&drvdata->mutex); |
| return -EPERM; |
| } |
| |
| drvdata->addr_val[idx] = val; |
| drvdata->addr_type[idx] = ETM_ADDR_TYPE_STOP; |
| drvdata->startstop_ctrl |= (1 << (idx + 16)); |
| drvdata->enable_ctrl1 |= BIT(25); |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_stop, S_IRUGO | S_IWUSR, etm_show_addr_stop, |
| etm_store_addr_stop); |
| |
| static ssize_t etm_show_addr_acctype(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->addr_acctype[drvdata->addr_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_addr_acctype(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->addr_acctype[drvdata->addr_idx] = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(addr_acctype, S_IRUGO | S_IWUSR, etm_show_addr_acctype, |
| etm_store_addr_acctype); |
| |
| static ssize_t etm_show_cntr_idx(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->addr_idx; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_cntr_idx(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| if (val >= drvdata->nr_cntr) |
| return -EINVAL; |
| |
| /* Use mutex to ensure index doesn't change while it gets dereferenced |
| * multiple times within a mutex block elsewhere. |
| */ |
| mutex_lock(&drvdata->mutex); |
| drvdata->cntr_idx = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(cntr_idx, S_IRUGO | S_IWUSR, etm_show_cntr_idx, |
| etm_store_cntr_idx); |
| |
| static ssize_t etm_show_cntr_rld_val(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->cntr_rld_val[drvdata->cntr_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_cntr_rld_val(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->cntr_rld_val[drvdata->cntr_idx] = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(cntr_rld_val, S_IRUGO | S_IWUSR, etm_show_cntr_rld_val, |
| etm_store_cntr_rld_val); |
| |
| static ssize_t etm_show_cntr_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->cntr_event[drvdata->cntr_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_cntr_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->cntr_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(cntr_event, S_IRUGO | S_IWUSR, etm_show_cntr_event, |
| etm_store_cntr_event); |
| |
| static ssize_t etm_show_cntr_rld_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->cntr_rld_event[drvdata->cntr_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_cntr_rld_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->cntr_rld_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(cntr_rld_event, S_IRUGO | S_IWUSR, etm_show_cntr_rld_event, |
| etm_store_cntr_rld_event); |
| |
| static ssize_t etm_show_cntr_val(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->cntr_val[drvdata->cntr_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_cntr_val(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->cntr_val[drvdata->cntr_idx] = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(cntr_val, S_IRUGO | S_IWUSR, etm_show_cntr_val, |
| etm_store_cntr_val); |
| |
| static ssize_t etm_show_seq_12_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_12_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_12_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_12_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_12_event, S_IRUGO | S_IWUSR, etm_show_seq_12_event, |
| etm_store_seq_12_event); |
| |
| static ssize_t etm_show_seq_21_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_21_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_21_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_21_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_21_event, S_IRUGO | S_IWUSR, etm_show_seq_21_event, |
| etm_store_seq_21_event); |
| |
| static ssize_t etm_show_seq_23_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_23_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_23_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_23_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_23_event, S_IRUGO | S_IWUSR, etm_show_seq_23_event, |
| etm_store_seq_23_event); |
| |
| static ssize_t etm_show_seq_31_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_31_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_31_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_31_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_31_event, S_IRUGO | S_IWUSR, etm_show_seq_31_event, |
| etm_store_seq_31_event); |
| |
| static ssize_t etm_show_seq_32_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_32_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_32_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_32_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_32_event, S_IRUGO | S_IWUSR, etm_show_seq_32_event, |
| etm_store_seq_32_event); |
| |
| static ssize_t etm_show_seq_13_event(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_13_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_13_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->seq_13_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(seq_13_event, S_IRUGO | S_IWUSR, etm_show_seq_13_event, |
| etm_store_seq_13_event); |
| |
| static ssize_t etm_show_seq_curr_state(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->seq_curr_state; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_seq_curr_state(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| if (val > ETM_SEQ_STATE_MAX_VAL) |
| return -EINVAL; |
| |
| drvdata->seq_curr_state = val; |
| return size; |
| } |
| static DEVICE_ATTR(seq_curr_state, S_IRUGO | S_IWUSR, etm_show_seq_curr_state, |
| etm_store_seq_curr_state); |
| |
| static ssize_t etm_show_ctxid_idx(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->ctxid_idx; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_ctxid_idx(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| if (val >= drvdata->nr_ctxid_cmp) |
| return -EINVAL; |
| |
| /* Use mutex to ensure index doesn't change while it gets dereferenced |
| * multiple times within a mutex block elsewhere. |
| */ |
| mutex_lock(&drvdata->mutex); |
| drvdata->ctxid_idx = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(ctxid_idx, S_IRUGO | S_IWUSR, etm_show_ctxid_idx, |
| etm_store_ctxid_idx); |
| |
| static ssize_t etm_show_ctxid_val(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| mutex_lock(&drvdata->mutex); |
| val = drvdata->ctxid_val[drvdata->ctxid_idx]; |
| mutex_unlock(&drvdata->mutex); |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_ctxid_val(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->mutex); |
| drvdata->ctxid_val[drvdata->ctxid_idx] = val; |
| mutex_unlock(&drvdata->mutex); |
| return size; |
| } |
| static DEVICE_ATTR(ctxid_val, S_IRUGO | S_IWUSR, etm_show_ctxid_val, |
| etm_store_ctxid_val); |
| |
| static ssize_t etm_show_ctxid_mask(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->ctxid_mask; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_ctxid_mask(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->ctxid_mask = val; |
| return size; |
| } |
| static DEVICE_ATTR(ctxid_mask, S_IRUGO | S_IWUSR, etm_show_ctxid_mask, |
| etm_store_ctxid_mask); |
| |
| static ssize_t etm_show_sync_freq(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->sync_freq; |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_sync_freq(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->sync_freq = val & ETM_SYNC_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(sync_freq, S_IRUGO | S_IWUSR, etm_show_sync_freq, |
| etm_store_sync_freq); |
| |
| static ssize_t etm_show_timestamp_event(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->timestamp_event; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t etm_store_timestamp_event(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->timestamp_event = val & ETM_EVENT_MASK; |
| return size; |
| } |
| static DEVICE_ATTR(timestamp_event, S_IRUGO | S_IWUSR, etm_show_timestamp_event, |
| etm_store_timestamp_event); |
| |
| static struct attribute *etm_attrs[] = { |
| &dev_attr_nr_addr_cmp.attr, |
| &dev_attr_nr_cntr.attr, |
| &dev_attr_nr_ctxid_cmp.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_val.attr, |
| &dev_attr_ctxid_mask.attr, |
| &dev_attr_sync_freq.attr, |
| &dev_attr_timestamp_event.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group etm_attr_grp = { |
| .attrs = etm_attrs, |
| }; |
| |
| static const struct attribute_group *etm_attr_grps[] = { |
| &etm_attr_grp, |
| NULL, |
| }; |
| |
| /* Memory mapped writes to clear os lock not supported */ |
| static void etm_os_unlock(void *unused) |
| { |
| unsigned long value = 0x0; |
| |
| asm("mcr p14, 1, %0, c1, c0, 4\n\t" : : "r" (value)); |
| asm("isb\n\t"); |
| } |
| |
| static bool __devinit etm_arch_supported(uint8_t arch) |
| { |
| switch (arch) { |
| case PFT_ARCH_V1_1: |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| static int __devinit etm_init_arch_data(struct etm_drvdata *drvdata) |
| { |
| int ret; |
| uint32_t etmidr; |
| uint32_t etmccr; |
| |
| /* Unlock OS lock first to allow memory mapped reads and writes */ |
| etm_os_unlock(NULL); |
| smp_call_function(etm_os_unlock, NULL, 1); |
| ETM_UNLOCK(drvdata); |
| /* Vote for ETM power/clock enable */ |
| etm_clr_pwrdwn(drvdata); |
| /* Set prog bit. It will be set from reset but this is included to |
| * ensure it is set |
| */ |
| etm_set_prog(drvdata); |
| |
| /* find all capabilities */ |
| etmidr = etm_readl(drvdata, ETMIDR); |
| drvdata->arch = BMVAL(etmidr, 4, 11); |
| if (etm_arch_supported(drvdata->arch) == false) { |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| etmccr = etm_readl(drvdata, ETMCCR); |
| drvdata->nr_addr_cmp = BMVAL(etmccr, 0, 3) * 2; |
| drvdata->nr_cntr = BMVAL(etmccr, 13, 15); |
| drvdata->nr_ext_inp = BMVAL(etmccr, 17, 19); |
| drvdata->nr_ext_out = BMVAL(etmccr, 20, 22); |
| drvdata->nr_ctxid_cmp = BMVAL(etmccr, 24, 25); |
| |
| /* Vote for ETM power/clock disable */ |
| etm_set_pwrdwn(drvdata); |
| ETM_LOCK(drvdata); |
| |
| return 0; |
| err: |
| return ret; |
| } |
| |
| static void __devinit etm_init_default_data(struct etm_drvdata *drvdata) |
| { |
| int i; |
| |
| drvdata->trigger_event = 0x406F; |
| drvdata->enable_event = 0x6F; |
| drvdata->enable_ctrl1 = 0x1; |
| drvdata->fifofull_level = 0x28; |
| if (drvdata->nr_addr_cmp >= 2) { |
| drvdata->addr_val[0] = (uint32_t) _stext; |
| drvdata->addr_val[1] = (uint32_t) _etext; |
| drvdata->addr_type[0] = ETM_ADDR_TYPE_RANGE; |
| drvdata->addr_type[1] = ETM_ADDR_TYPE_RANGE; |
| } |
| for (i = 0; i < drvdata->nr_cntr; i++) { |
| drvdata->cntr_event[i] = 0x406F; |
| drvdata->cntr_rld_event[i] = 0x406F; |
| } |
| drvdata->seq_12_event = 0x406F; |
| drvdata->seq_21_event = 0x406F; |
| drvdata->seq_23_event = 0x406F; |
| drvdata->seq_31_event = 0x406F; |
| drvdata->seq_32_event = 0x406F; |
| drvdata->seq_13_event = 0x406F; |
| /* Bits[7:0] of ETMSYNCFR are reserved on Krait pass3 onwards */ |
| if (cpu_is_krait() && !cpu_is_krait_v1() && !cpu_is_krait_v2()) |
| drvdata->sync_freq = 0x100; |
| else |
| drvdata->sync_freq = 0x80; |
| drvdata->timestamp_event = 0x406F; |
| |
| /* Overrides for Krait pass1 */ |
| if (cpu_is_krait_v1()) { |
| /* Krait pass1 doesn't support include filtering and non-cycle |
| * accurate tracing |
| */ |
| drvdata->mode = (ETM_MODE_EXCLUDE | ETM_MODE_CYCACC); |
| drvdata->ctrl = 0x1000; |
| drvdata->enable_ctrl1 = 0x1000000; |
| for (i = 0; i < drvdata->nr_addr_cmp; i++) { |
| drvdata->addr_val[i] = 0x0; |
| drvdata->addr_acctype[i] = 0x0; |
| drvdata->addr_type[i] = ETM_ADDR_TYPE_NONE; |
| } |
| } |
| } |
| |
| static int __devinit etm_probe(struct platform_device *pdev) |
| { |
| int ret; |
| struct device *dev = &pdev->dev; |
| struct coresight_platform_data *pdata; |
| struct etm_drvdata *drvdata; |
| struct resource *res; |
| static int etm_count; |
| struct coresight_desc *desc; |
| |
| if (pdev->dev.of_node) { |
| pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node); |
| if (IS_ERR(pdata)) |
| return PTR_ERR(pdata); |
| pdev->dev.platform_data = pdata; |
| } |
| |
| drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); |
| if (!drvdata) |
| return -ENOMEM; |
| drvdata->dev = &pdev->dev; |
| platform_set_drvdata(pdev, drvdata); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) |
| return -ENODEV; |
| |
| drvdata->base = devm_ioremap(dev, res->start, resource_size(res)); |
| if (!drvdata->base) |
| return -ENOMEM; |
| |
| mutex_init(&drvdata->mutex); |
| wake_lock_init(&drvdata->wake_lock, WAKE_LOCK_SUSPEND, "coresight-etm"); |
| pm_qos_add_request(&drvdata->qos_req, PM_QOS_CPU_DMA_LATENCY, |
| PM_QOS_DEFAULT_VALUE); |
| |
| drvdata->clk = devm_clk_get(dev, "core_clk"); |
| if (IS_ERR(drvdata->clk)) { |
| ret = PTR_ERR(drvdata->clk); |
| goto err0; |
| } |
| |
| ret = clk_set_rate(drvdata->clk, CORESIGHT_CLK_RATE_TRACE); |
| if (ret) |
| goto err0; |
| |
| drvdata->cpu = etm_count++; |
| |
| ret = clk_prepare_enable(drvdata->clk); |
| if (ret) |
| goto err0; |
| |
| ret = etm_init_arch_data(drvdata); |
| if (ret) |
| goto err1; |
| etm_init_default_data(drvdata); |
| |
| clk_disable_unprepare(drvdata->clk); |
| |
| desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); |
| if (!desc) { |
| ret = -ENOMEM; |
| goto err0; |
| } |
| desc->type = CORESIGHT_DEV_TYPE_SOURCE; |
| desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC; |
| desc->ops = &etm_cs_ops; |
| desc->pdata = pdev->dev.platform_data; |
| desc->dev = &pdev->dev; |
| desc->groups = etm_attr_grps; |
| desc->owner = THIS_MODULE; |
| drvdata->csdev = coresight_register(desc); |
| if (IS_ERR(drvdata->csdev)) { |
| ret = PTR_ERR(drvdata->csdev); |
| goto err0; |
| } |
| |
| dev_info(dev, "ETM initialized\n"); |
| |
| if (boot_enable) |
| coresight_enable(drvdata->csdev); |
| |
| return 0; |
| err1: |
| clk_disable_unprepare(drvdata->clk); |
| err0: |
| pm_qos_remove_request(&drvdata->qos_req); |
| wake_lock_destroy(&drvdata->wake_lock); |
| mutex_destroy(&drvdata->mutex); |
| return ret; |
| } |
| |
| static int __devexit etm_remove(struct platform_device *pdev) |
| { |
| struct etm_drvdata *drvdata = platform_get_drvdata(pdev); |
| |
| coresight_unregister(drvdata->csdev); |
| pm_qos_remove_request(&drvdata->qos_req); |
| wake_lock_destroy(&drvdata->wake_lock); |
| mutex_destroy(&drvdata->mutex); |
| return 0; |
| } |
| |
| static struct of_device_id etm_match[] = { |
| {.compatible = "arm,coresight-etm"}, |
| {} |
| }; |
| |
| static struct platform_driver etm_driver = { |
| .probe = etm_probe, |
| .remove = __devexit_p(etm_remove), |
| .driver = { |
| .name = "coresight-etm", |
| .owner = THIS_MODULE, |
| .of_match_table = etm_match, |
| }, |
| }; |
| |
| int __init etm_init(void) |
| { |
| return platform_driver_register(&etm_driver); |
| } |
| module_init(etm_init); |
| |
| void __exit etm_exit(void) |
| { |
| platform_driver_unregister(&etm_driver); |
| } |
| module_exit(etm_exit); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("CoreSight Program Flow Trace driver"); |