diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-cti.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-cti.c | 963 |
1 files changed, 0 insertions, 963 deletions
diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c deleted file mode 100644 index 40387d58c8e7..000000000000 --- a/drivers/hwtracing/coresight/coresight-cti.c +++ /dev/null @@ -1,963 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2018 Linaro Limited, All rights reserved. - * Author: Mike Leach <mike.leach@linaro.org> - */ - -#include <linux/amba/bus.h> -#include <linux/atomic.h> -#include <linux/bits.h> -#include <linux/coresight.h> -#include <linux/cpu_pm.h> -#include <linux/cpuhotplug.h> -#include <linux/device.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/mutex.h> -#include <linux/pm_runtime.h> -#include <linux/property.h> -#include <linux/spinlock.h> - -#include "coresight-priv.h" -#include "coresight-cti.h" - -/** - * CTI devices can be associated with a PE, or be connected to CoreSight - * hardware. We have a list of all CTIs irrespective of CPU bound or - * otherwise. - * - * We assume that the non-CPU CTIs are always powered as we do with sinks etc. - * - * We leave the client to figure out if all the CTIs are interconnected with - * the same CTM, in general this is the case but does not always have to be. - */ - -/* net of CTI devices connected via CTM */ -static LIST_HEAD(ect_net); - -/* protect the list */ -static DEFINE_MUTEX(ect_mutex); - -#define csdev_to_cti_drvdata(csdev) \ - dev_get_drvdata(csdev->dev.parent) - -/* power management handling */ -static int nr_cti_cpu; - -/* quick lookup list for CPU bound CTIs when power handling */ -static struct cti_drvdata *cti_cpu_drvdata[NR_CPUS]; - -/* - * CTI naming. CTI bound to cores will have the name cti_cpu<N> where - * N is the CPU ID. System CTIs will have the name cti_sys<I> where I - * is an index allocated by order of discovery. - * - * CTI device name list - for CTI not bound to cores. - */ -DEFINE_CORESIGHT_DEVLIST(cti_sys_devs, "cti_sys"); - -/* write set of regs to hardware - call with spinlock claimed */ -void cti_write_all_hw_regs(struct cti_drvdata *drvdata) -{ - struct cti_config *config = &drvdata->config; - int i; - - CS_UNLOCK(drvdata->base); - - /* disable CTI before writing registers */ - writel_relaxed(0, drvdata->base + CTICONTROL); - - /* write the CTI trigger registers */ - for (i = 0; i < config->nr_trig_max; i++) { - writel_relaxed(config->ctiinen[i], drvdata->base + CTIINEN(i)); - writel_relaxed(config->ctiouten[i], - drvdata->base + CTIOUTEN(i)); - } - - /* other regs */ - writel_relaxed(config->ctigate, drvdata->base + CTIGATE); - writel_relaxed(config->asicctl, drvdata->base + ASICCTL); - writel_relaxed(config->ctiappset, drvdata->base + CTIAPPSET); - - /* re-enable CTI */ - writel_relaxed(1, drvdata->base + CTICONTROL); - - CS_LOCK(drvdata->base); -} - -static void cti_enable_hw_smp_call(void *info) -{ - struct cti_drvdata *drvdata = info; - - cti_write_all_hw_regs(drvdata); -} - -/* write regs to hardware and enable */ -static int cti_enable_hw(struct cti_drvdata *drvdata) -{ - struct cti_config *config = &drvdata->config; - struct device *dev = &drvdata->csdev->dev; - int rc = 0; - - pm_runtime_get_sync(dev->parent); - spin_lock(&drvdata->spinlock); - - /* no need to do anything if enabled or unpowered*/ - if (config->hw_enabled || !config->hw_powered) - goto cti_state_unchanged; - - /* claim the device */ - rc = coresight_claim_device(drvdata->base); - if (rc) - goto cti_err_not_enabled; - - if (drvdata->ctidev.cpu >= 0) { - rc = smp_call_function_single(drvdata->ctidev.cpu, - cti_enable_hw_smp_call, - drvdata, 1); - if (rc) - goto cti_err_not_enabled; - } else { - cti_write_all_hw_regs(drvdata); - } - - config->hw_enabled = true; - atomic_inc(&drvdata->config.enable_req_count); - spin_unlock(&drvdata->spinlock); - return rc; - -cti_state_unchanged: - atomic_inc(&drvdata->config.enable_req_count); - - /* cannot enable due to error */ -cti_err_not_enabled: - spin_unlock(&drvdata->spinlock); - pm_runtime_put(dev->parent); - return rc; -} - -/* re-enable CTI on CPU when using CPU hotplug */ -static void cti_cpuhp_enable_hw(struct cti_drvdata *drvdata) -{ - struct cti_config *config = &drvdata->config; - struct device *dev = &drvdata->csdev->dev; - - pm_runtime_get_sync(dev->parent); - spin_lock(&drvdata->spinlock); - config->hw_powered = true; - - /* no need to do anything if no enable request */ - if (!atomic_read(&drvdata->config.enable_req_count)) - goto cti_hp_not_enabled; - - /* try to claim the device */ - if (coresight_claim_device(drvdata->base)) - goto cti_hp_not_enabled; - - cti_write_all_hw_regs(drvdata); - config->hw_enabled = true; - spin_unlock(&drvdata->spinlock); - return; - - /* did not re-enable due to no claim / no request */ -cti_hp_not_enabled: - spin_unlock(&drvdata->spinlock); - pm_runtime_put(dev->parent); -} - -/* disable hardware */ -static int cti_disable_hw(struct cti_drvdata *drvdata) -{ - struct cti_config *config = &drvdata->config; - struct device *dev = &drvdata->csdev->dev; - - spin_lock(&drvdata->spinlock); - - /* check refcount - disable on 0 */ - if (atomic_dec_return(&drvdata->config.enable_req_count) > 0) - goto cti_not_disabled; - - /* no need to do anything if disabled or cpu unpowered */ - if (!config->hw_enabled || !config->hw_powered) - goto cti_not_disabled; - - CS_UNLOCK(drvdata->base); - - /* disable CTI */ - writel_relaxed(0, drvdata->base + CTICONTROL); - config->hw_enabled = false; - - coresight_disclaim_device_unlocked(drvdata->base); - CS_LOCK(drvdata->base); - spin_unlock(&drvdata->spinlock); - pm_runtime_put(dev); - return 0; - - /* not disabled this call */ -cti_not_disabled: - spin_unlock(&drvdata->spinlock); - return 0; -} - -void cti_write_single_reg(struct cti_drvdata *drvdata, int offset, u32 value) -{ - CS_UNLOCK(drvdata->base); - writel_relaxed(value, drvdata->base + offset); - CS_LOCK(drvdata->base); -} - -void cti_write_intack(struct device *dev, u32 ackval) -{ - struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - struct cti_config *config = &drvdata->config; - - spin_lock(&drvdata->spinlock); - /* write if enabled */ - if (cti_active(config)) - cti_write_single_reg(drvdata, CTIINTACK, ackval); - spin_unlock(&drvdata->spinlock); -} - -/* - * Look at the HW DEVID register for some of the HW settings. - * DEVID[15:8] - max number of in / out triggers. - */ -#define CTI_DEVID_MAXTRIGS(devid_val) ((int) BMVAL(devid_val, 8, 15)) - -/* DEVID[19:16] - number of CTM channels */ -#define CTI_DEVID_CTMCHANNELS(devid_val) ((int) BMVAL(devid_val, 16, 19)) - -static void cti_set_default_config(struct device *dev, - struct cti_drvdata *drvdata) -{ - struct cti_config *config = &drvdata->config; - u32 devid; - - devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID); - config->nr_trig_max = CTI_DEVID_MAXTRIGS(devid); - - /* - * no current hardware should exceed this, but protect the driver - * in case of fault / out of spec hw - */ - if (config->nr_trig_max > CTIINOUTEN_MAX) { - dev_warn_once(dev, - "Limiting HW MaxTrig value(%d) to driver max(%d)\n", - config->nr_trig_max, CTIINOUTEN_MAX); - config->nr_trig_max = CTIINOUTEN_MAX; - } - - config->nr_ctm_channels = CTI_DEVID_CTMCHANNELS(devid); - - /* Most regs default to 0 as zalloc'ed except...*/ - config->trig_filter_enable = true; - config->ctigate = GENMASK(config->nr_ctm_channels - 1, 0); - atomic_set(&config->enable_req_count, 0); -} - -/* - * Add a connection entry to the list of connections for this - * CTI device. - */ -int cti_add_connection_entry(struct device *dev, struct cti_drvdata *drvdata, - struct cti_trig_con *tc, - struct coresight_device *csdev, - const char *assoc_dev_name) -{ - struct cti_device *cti_dev = &drvdata->ctidev; - - tc->con_dev = csdev; - /* - * Prefer actual associated CS device dev name to supplied value - - * which is likely to be node name / other conn name. - */ - if (csdev) - tc->con_dev_name = dev_name(&csdev->dev); - else if (assoc_dev_name != NULL) { - tc->con_dev_name = devm_kstrdup(dev, - assoc_dev_name, GFP_KERNEL); - if (!tc->con_dev_name) - return -ENOMEM; - } - list_add_tail(&tc->node, &cti_dev->trig_cons); - cti_dev->nr_trig_con++; - - /* add connection usage bit info to overall info */ - drvdata->config.trig_in_use |= tc->con_in->used_mask; - drvdata->config.trig_out_use |= tc->con_out->used_mask; - - return 0; -} - -/* create a trigger connection with appropriately sized signal groups */ -struct cti_trig_con *cti_allocate_trig_con(struct device *dev, int in_sigs, - int out_sigs) -{ - struct cti_trig_con *tc = NULL; - struct cti_trig_grp *in = NULL, *out = NULL; - - tc = devm_kzalloc(dev, sizeof(struct cti_trig_con), GFP_KERNEL); - if (!tc) - return tc; - - in = devm_kzalloc(dev, - offsetof(struct cti_trig_grp, sig_types[in_sigs]), - GFP_KERNEL); - if (!in) - return NULL; - - out = devm_kzalloc(dev, - offsetof(struct cti_trig_grp, sig_types[out_sigs]), - GFP_KERNEL); - if (!out) - return NULL; - - tc->con_in = in; - tc->con_out = out; - tc->con_in->nr_sigs = in_sigs; - tc->con_out->nr_sigs = out_sigs; - return tc; -} - -/* - * Add a default connection if nothing else is specified. - * single connection based on max in/out info, no assoc device - */ -int cti_add_default_connection(struct device *dev, struct cti_drvdata *drvdata) -{ - int ret = 0; - int n_trigs = drvdata->config.nr_trig_max; - u32 n_trig_mask = GENMASK(n_trigs - 1, 0); - struct cti_trig_con *tc = NULL; - - /* - * Assume max trigs for in and out, - * all used, default sig types allocated - */ - tc = cti_allocate_trig_con(dev, n_trigs, n_trigs); - if (!tc) - return -ENOMEM; - - tc->con_in->used_mask = n_trig_mask; - tc->con_out->used_mask = n_trig_mask; - ret = cti_add_connection_entry(dev, drvdata, tc, NULL, "default"); - return ret; -} - -/** cti channel api **/ -/* attach/detach channel from trigger - write through if enabled. */ -int cti_channel_trig_op(struct device *dev, enum cti_chan_op op, - enum cti_trig_dir direction, u32 channel_idx, - u32 trigger_idx) -{ - struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - struct cti_config *config = &drvdata->config; - u32 trig_bitmask; - u32 chan_bitmask; - u32 reg_value; - int reg_offset; - - /* ensure indexes in range */ - if ((channel_idx >= config->nr_ctm_channels) || - (trigger_idx >= config->nr_trig_max)) - return -EINVAL; - - trig_bitmask = BIT(trigger_idx); - - /* ensure registered triggers and not out filtered */ - if (direction == CTI_TRIG_IN) { - if (!(trig_bitmask & config->trig_in_use)) - return -EINVAL; - } else { - if (!(trig_bitmask & config->trig_out_use)) - return -EINVAL; - - if ((config->trig_filter_enable) && - (config->trig_out_filter & trig_bitmask)) - return -EINVAL; - } - - /* update the local register values */ - chan_bitmask = BIT(channel_idx); - reg_offset = (direction == CTI_TRIG_IN ? CTIINEN(trigger_idx) : - CTIOUTEN(trigger_idx)); - - spin_lock(&drvdata->spinlock); - - /* read - modify write - the trigger / channel enable value */ - reg_value = direction == CTI_TRIG_IN ? config->ctiinen[trigger_idx] : - config->ctiouten[trigger_idx]; - if (op == CTI_CHAN_ATTACH) - reg_value |= chan_bitmask; - else - reg_value &= ~chan_bitmask; - - /* write local copy */ - if (direction == CTI_TRIG_IN) - config->ctiinen[trigger_idx] = reg_value; - else - config->ctiouten[trigger_idx] = reg_value; - - /* write through if enabled */ - if (cti_active(config)) - cti_write_single_reg(drvdata, reg_offset, reg_value); - spin_unlock(&drvdata->spinlock); - return 0; -} - -int cti_channel_gate_op(struct device *dev, enum cti_chan_gate_op op, - u32 channel_idx) -{ - struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - struct cti_config *config = &drvdata->config; - u32 chan_bitmask; - u32 reg_value; - int err = 0; - - if (channel_idx >= config->nr_ctm_channels) - return -EINVAL; - - chan_bitmask = BIT(channel_idx); - - spin_lock(&drvdata->spinlock); - reg_value = config->ctigate; - switch (op) { - case CTI_GATE_CHAN_ENABLE: - reg_value |= chan_bitmask; - break; - - case CTI_GATE_CHAN_DISABLE: - reg_value &= ~chan_bitmask; - break; - - default: - err = -EINVAL; - break; - } - if (err == 0) { - config->ctigate = reg_value; - if (cti_active(config)) - cti_write_single_reg(drvdata, CTIGATE, reg_value); - } - spin_unlock(&drvdata->spinlock); - return err; -} - -int cti_channel_setop(struct device *dev, enum cti_chan_set_op op, - u32 channel_idx) -{ - struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - struct cti_config *config = &drvdata->config; - u32 chan_bitmask; - u32 reg_value; - u32 reg_offset; - int err = 0; - - if (channel_idx >= config->nr_ctm_channels) - return -EINVAL; - - chan_bitmask = BIT(channel_idx); - - spin_lock(&drvdata->spinlock); - reg_value = config->ctiappset; - switch (op) { - case CTI_CHAN_SET: - config->ctiappset |= chan_bitmask; - reg_value = config->ctiappset; - reg_offset = CTIAPPSET; - break; - - case CTI_CHAN_CLR: - config->ctiappset &= ~chan_bitmask; - reg_value = chan_bitmask; - reg_offset = CTIAPPCLEAR; - break; - - case CTI_CHAN_PULSE: - config->ctiappset &= ~chan_bitmask; - reg_value = chan_bitmask; - reg_offset = CTIAPPPULSE; - break; - - default: - err = -EINVAL; - break; - } - - if ((err == 0) && cti_active(config)) - cti_write_single_reg(drvdata, reg_offset, reg_value); - spin_unlock(&drvdata->spinlock); - - return err; -} - -static bool cti_add_sysfs_link(struct cti_drvdata *drvdata, - struct cti_trig_con *tc) -{ - struct coresight_sysfs_link link_info; - int link_err = 0; - - link_info.orig = drvdata->csdev; - link_info.orig_name = tc->con_dev_name; - link_info.target = tc->con_dev; - link_info.target_name = dev_name(&drvdata->csdev->dev); - - link_err = coresight_add_sysfs_link(&link_info); - if (link_err) - dev_warn(&drvdata->csdev->dev, - "Failed to set CTI sysfs link %s<=>%s\n", - link_info.orig_name, link_info.target_name); - return !link_err; -} - -static void cti_remove_sysfs_link(struct cti_trig_con *tc) -{ - struct coresight_sysfs_link link_info; - - link_info.orig_name = tc->con_dev_name; - link_info.target = tc->con_dev; - coresight_remove_sysfs_link(&link_info); -} - -/* - * Look for a matching connection device name in the list of connections. - * If found then swap in the csdev name, set trig con association pointer - * and return found. - */ -static bool -cti_match_fixup_csdev(struct cti_device *ctidev, const char *node_name, - struct coresight_device *csdev) -{ - struct cti_trig_con *tc; - struct cti_drvdata *drvdata = container_of(ctidev, struct cti_drvdata, - ctidev); - - list_for_each_entry(tc, &ctidev->trig_cons, node) { - if (tc->con_dev_name) { - if (!strcmp(node_name, tc->con_dev_name)) { - /* match: so swap in csdev name & dev */ - tc->con_dev_name = dev_name(&csdev->dev); - tc->con_dev = csdev; - /* try to set sysfs link */ - if (cti_add_sysfs_link(drvdata, tc)) - return true; - /* link failed - remove CTI reference */ - tc->con_dev = NULL; - break; - } - } - } - return false; -} - -/* - * Search the cti list to add an associated CTI into the supplied CS device - * This will set the association if CTI declared before the CS device. - * (called from coresight_register() with coresight_mutex locked). - */ -void cti_add_assoc_to_csdev(struct coresight_device *csdev) -{ - struct cti_drvdata *ect_item; - struct cti_device *ctidev; - const char *node_name = NULL; - - /* protect the list */ - mutex_lock(&ect_mutex); - - /* exit if current is an ECT device.*/ - if ((csdev->type == CORESIGHT_DEV_TYPE_ECT) || list_empty(&ect_net)) - goto cti_add_done; - - /* if we didn't find the csdev previously we used the fwnode name */ - node_name = cti_plat_get_node_name(dev_fwnode(csdev->dev.parent)); - if (!node_name) - goto cti_add_done; - - /* for each CTI in list... */ - list_for_each_entry(ect_item, &ect_net, node) { - ctidev = &ect_item->ctidev; - if (cti_match_fixup_csdev(ctidev, node_name, csdev)) { - /* - * if we found a matching csdev then update the ECT - * association pointer for the device with this CTI. - */ - csdev->ect_dev = ect_item->csdev; - break; - } - } -cti_add_done: - mutex_unlock(&ect_mutex); -} -EXPORT_SYMBOL_GPL(cti_add_assoc_to_csdev); - -/* - * Removing the associated devices is easier. - * A CTI will not have a value for csdev->ect_dev. - */ -void cti_remove_assoc_from_csdev(struct coresight_device *csdev) -{ - struct cti_drvdata *ctidrv; - struct cti_trig_con *tc; - struct cti_device *ctidev; - - mutex_lock(&ect_mutex); - if (csdev->ect_dev) { - ctidrv = csdev_to_cti_drvdata(csdev->ect_dev); - ctidev = &ctidrv->ctidev; - list_for_each_entry(tc, &ctidev->trig_cons, node) { - if (tc->con_dev == csdev->ect_dev) { - cti_remove_sysfs_link(tc); - tc->con_dev = NULL; - break; - } - } - csdev->ect_dev = NULL; - } - mutex_unlock(&ect_mutex); -} -EXPORT_SYMBOL_GPL(cti_remove_assoc_from_csdev); - -/* - * Update the cross references where the associated device was found - * while we were building the connection info. This will occur if the - * assoc device was registered before the CTI. - */ -static void cti_update_conn_xrefs(struct cti_drvdata *drvdata) -{ - struct cti_trig_con *tc; - struct cti_device *ctidev = &drvdata->ctidev; - - list_for_each_entry(tc, &ctidev->trig_cons, node) { - if (tc->con_dev) { - /* if we can set the sysfs link */ - if (cti_add_sysfs_link(drvdata, tc)) - /* set the CTI/csdev association */ - coresight_set_assoc_ectdev_mutex(tc->con_dev, - drvdata->csdev); - else - /* otherwise remove reference from CTI */ - tc->con_dev = NULL; - } - } -} - -static void cti_remove_conn_xrefs(struct cti_drvdata *drvdata) -{ - struct cti_trig_con *tc; - struct cti_device *ctidev = &drvdata->ctidev; - - list_for_each_entry(tc, &ctidev->trig_cons, node) { - if (tc->con_dev) { - coresight_set_assoc_ectdev_mutex(tc->con_dev, - NULL); - cti_remove_sysfs_link(tc); - tc->con_dev = NULL; - } - } -} - -/** cti PM callbacks **/ -static int cti_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd, - void *v) -{ - struct cti_drvdata *drvdata; - unsigned int cpu = smp_processor_id(); - int notify_res = NOTIFY_OK; - - if (!cti_cpu_drvdata[cpu]) - return NOTIFY_OK; - - drvdata = cti_cpu_drvdata[cpu]; - - if (WARN_ON_ONCE(drvdata->ctidev.cpu != cpu)) - return NOTIFY_BAD; - - spin_lock(&drvdata->spinlock); - - switch (cmd) { - case CPU_PM_ENTER: - /* CTI regs all static - we have a copy & nothing to save */ - drvdata->config.hw_powered = false; - if (drvdata->config.hw_enabled) - coresight_disclaim_device(drvdata->base); - break; - - case CPU_PM_ENTER_FAILED: - drvdata->config.hw_powered = true; - if (drvdata->config.hw_enabled) { - if (coresight_claim_device(drvdata->base)) - drvdata->config.hw_enabled = false; - } - break; - - case CPU_PM_EXIT: - /* write hardware registers to re-enable. */ - drvdata->config.hw_powered = true; - drvdata->config.hw_enabled = false; - - /* check enable reference count to enable HW */ - if (atomic_read(&drvdata->config.enable_req_count)) { - /* check we can claim the device as we re-power */ - if (coresight_claim_device(drvdata->base)) - goto cti_notify_exit; - - drvdata->config.hw_enabled = true; - cti_write_all_hw_regs(drvdata); - } - break; - - default: - notify_res = NOTIFY_DONE; - break; - } - -cti_notify_exit: - spin_unlock(&drvdata->spinlock); - return notify_res; -} - -static struct notifier_block cti_cpu_pm_nb = { - .notifier_call = cti_cpu_pm_notify, -}; - -/* CPU HP handlers */ -static int cti_starting_cpu(unsigned int cpu) -{ - struct cti_drvdata *drvdata = cti_cpu_drvdata[cpu]; - - if (!drvdata) - return 0; - - cti_cpuhp_enable_hw(drvdata); - return 0; -} - -static int cti_dying_cpu(unsigned int cpu) -{ - struct cti_drvdata *drvdata = cti_cpu_drvdata[cpu]; - - if (!drvdata) - return 0; - - spin_lock(&drvdata->spinlock); - drvdata->config.hw_powered = false; - coresight_disclaim_device(drvdata->base); - spin_unlock(&drvdata->spinlock); - return 0; -} - -/* release PM registrations */ -static void cti_pm_release(struct cti_drvdata *drvdata) -{ - if (drvdata->ctidev.cpu >= 0) { - if (--nr_cti_cpu == 0) { - cpu_pm_unregister_notifier(&cti_cpu_pm_nb); - - cpuhp_remove_state_nocalls( - CPUHP_AP_ARM_CORESIGHT_CTI_STARTING); - } - cti_cpu_drvdata[drvdata->ctidev.cpu] = NULL; - } -} - -/** cti ect operations **/ -int cti_enable(struct coresight_device *csdev) -{ - struct cti_drvdata *drvdata = csdev_to_cti_drvdata(csdev); - - return cti_enable_hw(drvdata); -} - -int cti_disable(struct coresight_device *csdev) -{ - struct cti_drvdata *drvdata = csdev_to_cti_drvdata(csdev); - - return cti_disable_hw(drvdata); -} - -static const struct coresight_ops_ect cti_ops_ect = { - .enable = cti_enable, - .disable = cti_disable, -}; - -static const struct coresight_ops cti_ops = { - .ect_ops = &cti_ops_ect, -}; - -/* - * Free up CTI specific resources - * called by dev->release, need to call down to underlying csdev release. - */ -static void cti_device_release(struct device *dev) -{ - struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - struct cti_drvdata *ect_item, *ect_tmp; - - mutex_lock(&ect_mutex); - cti_remove_conn_xrefs(drvdata); - cti_pm_release(drvdata); - - /* remove from the list */ - list_for_each_entry_safe(ect_item, ect_tmp, &ect_net, node) { - if (ect_item == drvdata) { - list_del(&ect_item->node); - break; - } - } - mutex_unlock(&ect_mutex); - - if (drvdata->csdev_release) - drvdata->csdev_release(dev); -} - -static int cti_probe(struct amba_device *adev, const struct amba_id *id) -{ - int ret = 0; - void __iomem *base; - struct device *dev = &adev->dev; - struct cti_drvdata *drvdata = NULL; - struct coresight_desc cti_desc; - struct coresight_platform_data *pdata = NULL; - struct resource *res = &adev->res; - - /* driver data*/ - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) { - ret = -ENOMEM; - dev_info(dev, "%s, mem err\n", __func__); - goto err_out; - } - - /* Validity for the resource is already checked by the AMBA core */ - base = devm_ioremap_resource(dev, res); - if (IS_ERR(base)) { - ret = PTR_ERR(base); - dev_err(dev, "%s, remap err\n", __func__); - goto err_out; - } - drvdata->base = base; - - dev_set_drvdata(dev, drvdata); - - /* default CTI device info */ - drvdata->ctidev.cpu = -1; - drvdata->ctidev.nr_trig_con = 0; - drvdata->ctidev.ctm_id = 0; - INIT_LIST_HEAD(&drvdata->ctidev.trig_cons); - - spin_lock_init(&drvdata->spinlock); - - /* initialise CTI driver config values */ - cti_set_default_config(dev, drvdata); - - pdata = coresight_cti_get_platform_data(dev); - if (IS_ERR(pdata)) { - dev_err(dev, "coresight_cti_get_platform_data err\n"); - ret = PTR_ERR(pdata); - goto err_out; - } - - /* default to powered - could change on PM notifications */ - drvdata->config.hw_powered = true; - - /* set up device name - will depend if cpu bound or otherwise */ - if (drvdata->ctidev.cpu >= 0) - cti_desc.name = devm_kasprintf(dev, GFP_KERNEL, "cti_cpu%d", - drvdata->ctidev.cpu); - else - cti_desc.name = coresight_alloc_device_name(&cti_sys_devs, dev); - if (!cti_desc.name) { - ret = -ENOMEM; - goto err_out; - } - - /* setup CPU power management handling for CPU bound CTI devices. */ - if (drvdata->ctidev.cpu >= 0) { - cti_cpu_drvdata[drvdata->ctidev.cpu] = drvdata; - if (!nr_cti_cpu++) { - cpus_read_lock(); - ret = cpuhp_setup_state_nocalls_cpuslocked( - CPUHP_AP_ARM_CORESIGHT_CTI_STARTING, - "arm/coresight_cti:starting", - cti_starting_cpu, cti_dying_cpu); - - if (!ret) - ret = cpu_pm_register_notifier(&cti_cpu_pm_nb); - cpus_read_unlock(); - if (ret) - goto err_out; - } - } - - /* create dynamic attributes for connections */ - ret = cti_create_cons_sysfs(dev, drvdata); - if (ret) { - dev_err(dev, "%s: create dynamic sysfs entries failed\n", - cti_desc.name); - goto err_out; - } - - /* set up coresight component description */ - cti_desc.pdata = pdata; - cti_desc.type = CORESIGHT_DEV_TYPE_ECT; - cti_desc.subtype.ect_subtype = CORESIGHT_DEV_SUBTYPE_ECT_CTI; - cti_desc.ops = &cti_ops; - cti_desc.groups = drvdata->ctidev.con_groups; - cti_desc.dev = dev; - drvdata->csdev = coresight_register(&cti_desc); - if (IS_ERR(drvdata->csdev)) { - ret = PTR_ERR(drvdata->csdev); - goto err_out; - } - - /* add to list of CTI devices */ - mutex_lock(&ect_mutex); - list_add(&drvdata->node, &ect_net); - /* set any cross references */ - cti_update_conn_xrefs(drvdata); - mutex_unlock(&ect_mutex); - - /* set up release chain */ - drvdata->csdev_release = drvdata->csdev->dev.release; - drvdata->csdev->dev.release = cti_device_release; - - /* all done - dec pm refcount */ - pm_runtime_put(&adev->dev); - dev_info(&drvdata->csdev->dev, "CTI initialized\n"); - return 0; - -err_out: - cti_pm_release(drvdata); - return ret; -} - -static struct amba_cs_uci_id uci_id_cti[] = { - { - /* CTI UCI data */ - .devarch = 0x47701a14, /* CTI v2 */ - .devarch_mask = 0xfff0ffff, - .devtype = 0x00000014, /* maj(0x4-debug) min(0x1-ECT) */ - } -}; - -static const struct amba_id cti_ids[] = { - CS_AMBA_ID(0x000bb906), /* Coresight CTI (SoC 400), C-A72, C-A57 */ - CS_AMBA_ID(0x000bb922), /* CTI - C-A8 */ - CS_AMBA_ID(0x000bb9a8), /* CTI - C-A53 */ - CS_AMBA_ID(0x000bb9aa), /* CTI - C-A73 */ - CS_AMBA_UCI_ID(0x000bb9da, uci_id_cti), /* CTI - C-A35 */ - CS_AMBA_UCI_ID(0x000bb9ed, uci_id_cti), /* Coresight CTI (SoC 600) */ - { 0, 0}, -}; - -static struct amba_driver cti_driver = { - .drv = { - .name = "coresight-cti", - .owner = THIS_MODULE, - .suppress_bind_attrs = true, - }, - .probe = cti_probe, - .id_table = cti_ids, -}; -builtin_amba_driver(cti_driver); |