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-rw-r--r--drivers/bus/arm-cci.c47
-rw-r--r--drivers/bus/arm-ccn.c166
-rw-r--r--drivers/bus/mips_cdmm.c70
-rw-r--r--drivers/bus/vexpress-config.c1
4 files changed, 132 insertions, 152 deletions
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 5755907f836f..890082315054 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -144,15 +144,12 @@ struct cci_pmu {
int num_cntrs;
atomic_t active_events;
struct mutex reserve_mutex;
- struct list_head entry;
+ struct hlist_node node;
cpumask_t cpus;
};
#define to_cci_pmu(c) (container_of(c, struct cci_pmu, pmu))
-static DEFINE_MUTEX(cci_pmu_mutex);
-static LIST_HEAD(cci_pmu_list);
-
enum cci_models {
#ifdef CONFIG_ARM_CCI400_PMU
CCI400_R0,
@@ -551,7 +548,7 @@ static struct attribute *cci5xx_pmu_event_attrs[] = {
CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB),
CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC),
CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snopp_rq_stall_tt_full, 0xE),
+ CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_stall_tt_full, 0xE),
CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
NULL
};
@@ -1506,25 +1503,21 @@ static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
return perf_pmu_register(&cci_pmu->pmu, name, -1);
}
-static int cci_pmu_offline_cpu(unsigned int cpu)
+static int cci_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
{
- struct cci_pmu *cci_pmu;
+ struct cci_pmu *cci_pmu = hlist_entry_safe(node, struct cci_pmu, node);
unsigned int target;
- mutex_lock(&cci_pmu_mutex);
- list_for_each_entry(cci_pmu, &cci_pmu_list, entry) {
- if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
- continue;
- target = cpumask_any_but(cpu_online_mask, cpu);
- if (target >= nr_cpu_ids)
- continue;
- /*
- * TODO: migrate context once core races on event->ctx have
- * been fixed.
- */
- cpumask_set_cpu(target, &cci_pmu->cpus);
- }
- mutex_unlock(&cci_pmu_mutex);
+ if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
+ return 0;
+ target = cpumask_any_but(cpu_online_mask, cpu);
+ if (target >= nr_cpu_ids)
+ return 0;
+ /*
+ * TODO: migrate context once core races on event->ctx have
+ * been fixed.
+ */
+ cpumask_set_cpu(target, &cci_pmu->cpus);
return 0;
}
@@ -1768,10 +1761,8 @@ static int cci_pmu_probe(struct platform_device *pdev)
if (ret)
return ret;
- mutex_lock(&cci_pmu_mutex);
- list_add(&cci_pmu->entry, &cci_pmu_list);
- mutex_unlock(&cci_pmu_mutex);
-
+ cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
+ &cci_pmu->node);
pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
return 0;
}
@@ -1804,9 +1795,9 @@ static int __init cci_platform_init(void)
{
int ret;
- ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
- "AP_PERF_ARM_CCI_ONLINE", NULL,
- cci_pmu_offline_cpu);
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCI_ONLINE,
+ "AP_PERF_ARM_CCI_ONLINE", NULL,
+ cci_pmu_offline_cpu);
if (ret)
return ret;
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index 97a9185af433..d1074d9b38ba 100644
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -167,7 +167,7 @@ struct arm_ccn_dt {
struct hrtimer hrtimer;
cpumask_t cpu;
- struct list_head entry;
+ struct hlist_node node;
struct pmu pmu;
};
@@ -187,11 +187,9 @@ struct arm_ccn {
struct arm_ccn_component *xp;
struct arm_ccn_dt dt;
+ int mn_id;
};
-static DEFINE_MUTEX(arm_ccn_mutex);
-static LIST_HEAD(arm_ccn_list);
-
static int arm_ccn_node_to_xp(int node)
{
return node / CCN_NUM_XP_PORTS;
@@ -212,6 +210,7 @@ static int arm_ccn_node_to_xp_port(int node)
#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff)
#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff)
#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3)
+#define CCN_CONFIG_BUS(_config) (((_config) >> 24) & 0x3)
#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7)
#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1)
#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf)
@@ -241,6 +240,7 @@ static CCN_FORMAT_ATTR(xp, "config:0-7");
static CCN_FORMAT_ATTR(type, "config:8-15");
static CCN_FORMAT_ATTR(event, "config:16-23");
static CCN_FORMAT_ATTR(port, "config:24-25");
+static CCN_FORMAT_ATTR(bus, "config:24-25");
static CCN_FORMAT_ATTR(vc, "config:26-28");
static CCN_FORMAT_ATTR(dir, "config:29-29");
static CCN_FORMAT_ATTR(mask, "config:30-33");
@@ -253,6 +253,7 @@ static struct attribute *arm_ccn_pmu_format_attrs[] = {
&arm_ccn_pmu_format_attr_type.attr.attr,
&arm_ccn_pmu_format_attr_event.attr.attr,
&arm_ccn_pmu_format_attr_port.attr.attr,
+ &arm_ccn_pmu_format_attr_bus.attr.attr,
&arm_ccn_pmu_format_attr_vc.attr.attr,
&arm_ccn_pmu_format_attr_dir.attr.attr,
&arm_ccn_pmu_format_attr_mask.attr.attr,
@@ -328,6 +329,7 @@ struct arm_ccn_pmu_event {
static ssize_t arm_ccn_pmu_event_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
struct arm_ccn_pmu_event *event = container_of(attr,
struct arm_ccn_pmu_event, attr);
ssize_t res;
@@ -349,10 +351,17 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev,
break;
case CCN_TYPE_XP:
res += snprintf(buf + res, PAGE_SIZE - res,
- ",xp=?,port=?,vc=?,dir=?");
+ ",xp=?,vc=?");
if (event->event == CCN_EVENT_WATCHPOINT)
res += snprintf(buf + res, PAGE_SIZE - res,
- ",cmp_l=?,cmp_h=?,mask=?");
+ ",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
+ else
+ res += snprintf(buf + res, PAGE_SIZE - res,
+ ",bus=?");
+
+ break;
+ case CCN_TYPE_MN:
+ res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
break;
default:
res += snprintf(buf + res, PAGE_SIZE - res, ",node=?");
@@ -383,9 +392,9 @@ static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj,
}
static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = {
- CCN_EVENT_MN(eobarrier, "dir=0,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
- CCN_EVENT_MN(ecbarrier, "dir=0,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
- CCN_EVENT_MN(dvmop, "dir=0,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
+ CCN_EVENT_MN(eobarrier, "dir=1,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
+ CCN_EVENT_MN(ecbarrier, "dir=1,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
+ CCN_EVENT_MN(dvmop, "dir=1,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
@@ -733,9 +742,10 @@ static int arm_ccn_pmu_event_init(struct perf_event *event)
if (has_branch_stack(event) || event->attr.exclude_user ||
event->attr.exclude_kernel || event->attr.exclude_hv ||
- event->attr.exclude_idle) {
+ event->attr.exclude_idle || event->attr.exclude_host ||
+ event->attr.exclude_guest) {
dev_warn(ccn->dev, "Can't exclude execution levels!\n");
- return -EOPNOTSUPP;
+ return -EINVAL;
}
if (event->cpu < 0) {
@@ -759,6 +769,12 @@ static int arm_ccn_pmu_event_init(struct perf_event *event)
/* Validate node/xp vs topology */
switch (type) {
+ case CCN_TYPE_MN:
+ if (node_xp != ccn->mn_id) {
+ dev_warn(ccn->dev, "Invalid MN ID %d!\n", node_xp);
+ return -EINVAL;
+ }
+ break;
case CCN_TYPE_XP:
if (node_xp >= ccn->num_xps) {
dev_warn(ccn->dev, "Invalid XP ID %d!\n", node_xp);
@@ -886,6 +902,10 @@ static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable)
struct arm_ccn_component *xp;
u32 val, dt_cfg;
+ /* Nothing to do for cycle counter */
+ if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
+ return;
+
if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)];
else
@@ -917,38 +937,17 @@ static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
arm_ccn_pmu_read_counter(ccn, hw->idx));
hw->state = 0;
- /*
- * Pin the timer, so that the overflows are handled by the chosen
- * event->cpu (this is the same one as presented in "cpumask"
- * attribute).
- */
- if (!ccn->irq)
- hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
- HRTIMER_MODE_REL_PINNED);
-
/* Set the DT bus input, engaging the counter */
arm_ccn_pmu_xp_dt_config(event, 1);
}
static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
{
- struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
struct hw_perf_event *hw = &event->hw;
- u64 timeout;
/* Disable counting, setting the DT bus to pass-through mode */
arm_ccn_pmu_xp_dt_config(event, 0);
- if (!ccn->irq)
- hrtimer_cancel(&ccn->dt.hrtimer);
-
- /* Let the DT bus drain */
- timeout = arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) +
- ccn->num_xps;
- while (arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) <
- timeout)
- cpu_relax();
-
if (flags & PERF_EF_UPDATE)
arm_ccn_pmu_event_update(event);
@@ -988,7 +987,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
/* Comparison values */
writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp));
- writel((cmp_l >> 32) & 0xefffffff,
+ writel((cmp_l >> 32) & 0x7fffffff,
source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4);
writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
writel((cmp_h >> 32) & 0x0fffffff,
@@ -996,7 +995,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
/* Mask */
writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp));
- writel((mask_l >> 32) & 0xefffffff,
+ writel((mask_l >> 32) & 0x7fffffff,
source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4);
writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
writel((mask_h >> 32) & 0x0fffffff,
@@ -1014,7 +1013,7 @@ static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
id = (CCN_CONFIG_VC(event->attr.config) << 4) |
- (CCN_CONFIG_PORT(event->attr.config) << 3) |
+ (CCN_CONFIG_BUS(event->attr.config) << 3) |
(CCN_CONFIG_EVENT(event->attr.config) << 0);
val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
@@ -1099,15 +1098,31 @@ static void arm_ccn_pmu_event_config(struct perf_event *event)
spin_unlock(&ccn->dt.config_lock);
}
+static int arm_ccn_pmu_active_counters(struct arm_ccn *ccn)
+{
+ return bitmap_weight(ccn->dt.pmu_counters_mask,
+ CCN_NUM_PMU_EVENT_COUNTERS + 1);
+}
+
static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
{
int err;
struct hw_perf_event *hw = &event->hw;
+ struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
err = arm_ccn_pmu_event_alloc(event);
if (err)
return err;
+ /*
+ * Pin the timer, so that the overflows are handled by the chosen
+ * event->cpu (this is the same one as presented in "cpumask"
+ * attribute).
+ */
+ if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1)
+ hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
+ HRTIMER_MODE_REL_PINNED);
+
arm_ccn_pmu_event_config(event);
hw->state = PERF_HES_STOPPED;
@@ -1120,9 +1135,14 @@ static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
{
+ struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
+
arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
arm_ccn_pmu_event_release(event);
+
+ if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0)
+ hrtimer_cancel(&ccn->dt.hrtimer);
}
static void arm_ccn_pmu_event_read(struct perf_event *event)
@@ -1130,6 +1150,24 @@ static void arm_ccn_pmu_event_read(struct perf_event *event)
arm_ccn_pmu_event_update(event);
}
+static void arm_ccn_pmu_enable(struct pmu *pmu)
+{
+ struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
+
+ u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
+ val |= CCN_DT_PMCR__PMU_EN;
+ writel(val, ccn->dt.base + CCN_DT_PMCR);
+}
+
+static void arm_ccn_pmu_disable(struct pmu *pmu)
+{
+ struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
+
+ u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
+ val &= ~CCN_DT_PMCR__PMU_EN;
+ writel(val, ccn->dt.base + CCN_DT_PMCR);
+}
+
static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
{
u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
@@ -1173,30 +1211,24 @@ static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
}
-static int arm_ccn_pmu_offline_cpu(unsigned int cpu)
+static int arm_ccn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
{
- struct arm_ccn_dt *dt;
+ struct arm_ccn_dt *dt = hlist_entry_safe(node, struct arm_ccn_dt, node);
+ struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
unsigned int target;
- mutex_lock(&arm_ccn_mutex);
- list_for_each_entry(dt, &arm_ccn_list, entry) {
- struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
-
- if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
- continue;
- target = cpumask_any_but(cpu_online_mask, cpu);
- if (target >= nr_cpu_ids)
- continue;
- perf_pmu_migrate_context(&dt->pmu, cpu, target);
- cpumask_set_cpu(target, &dt->cpu);
- if (ccn->irq)
- WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0);
- }
- mutex_unlock(&arm_ccn_mutex);
+ if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
+ return 0;
+ target = cpumask_any_but(cpu_online_mask, cpu);
+ if (target >= nr_cpu_ids)
+ return 0;
+ perf_pmu_migrate_context(&dt->pmu, cpu, target);
+ cpumask_set_cpu(target, &dt->cpu);
+ if (ccn->irq)
+ WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0);
return 0;
}
-
static DEFINE_IDA(arm_ccn_pmu_ida);
static int arm_ccn_pmu_init(struct arm_ccn *ccn)
@@ -1252,6 +1284,8 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
.start = arm_ccn_pmu_event_start,
.stop = arm_ccn_pmu_event_stop,
.read = arm_ccn_pmu_event_read,
+ .pmu_enable = arm_ccn_pmu_enable,
+ .pmu_disable = arm_ccn_pmu_disable,
};
/* No overflow interrupt? Have to use a timer instead. */
@@ -1278,9 +1312,8 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
if (err)
goto error_pmu_register;
- mutex_lock(&arm_ccn_mutex);
- list_add(&ccn->dt.entry, &arm_ccn_list);
- mutex_unlock(&arm_ccn_mutex);
+ cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
+ &ccn->dt.node);
return 0;
error_pmu_register:
@@ -1296,10 +1329,8 @@ static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
{
int i;
- mutex_lock(&arm_ccn_mutex);
- list_del(&ccn->dt.entry);
- mutex_unlock(&arm_ccn_mutex);
-
+ cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
+ &ccn->dt.node);
if (ccn->irq)
irq_set_affinity_hint(ccn->irq, NULL);
for (i = 0; i < ccn->num_xps; i++)
@@ -1361,6 +1392,8 @@ static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
switch (type) {
case CCN_TYPE_MN:
+ ccn->mn_id = id;
+ return 0;
case CCN_TYPE_DT:
return 0;
case CCN_TYPE_XP:
@@ -1471,8 +1504,9 @@ static int arm_ccn_probe(struct platform_device *pdev)
/* Can set 'disable' bits, so can acknowledge interrupts */
writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
ccn->base + CCN_MN_ERRINT_STATUS);
- err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler, 0,
- dev_name(ccn->dev), ccn);
+ err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
+ dev_name(ccn->dev), ccn);
if (err)
return err;
@@ -1527,9 +1561,9 @@ static int __init arm_ccn_init(void)
{
int i, ret;
- ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
- "AP_PERF_ARM_CCN_ONLINE", NULL,
- arm_ccn_pmu_offline_cpu);
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE,
+ "AP_PERF_ARM_CCN_ONLINE", NULL,
+ arm_ccn_pmu_offline_cpu);
if (ret)
return ret;
@@ -1541,7 +1575,7 @@ static int __init arm_ccn_init(void)
static void __exit arm_ccn_exit(void)
{
- cpuhp_remove_state_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
platform_driver_unregister(&arm_ccn_driver);
}
diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
index cad49bc38b3e..1b14256376d2 100644
--- a/drivers/bus/mips_cdmm.c
+++ b/drivers/bus/mips_cdmm.c
@@ -596,19 +596,20 @@ BUILD_PERDEV_HELPER(cpu_down) /* int mips_cdmm_cpu_down_helper(...) */
BUILD_PERDEV_HELPER(cpu_up) /* int mips_cdmm_cpu_up_helper(...) */
/**
- * mips_cdmm_bus_down() - Tear down the CDMM bus.
- * @data: Pointer to unsigned int CPU number.
+ * mips_cdmm_cpu_down_prep() - Callback for CPUHP DOWN_PREP:
+ * Tear down the CDMM bus.
+ * @cpu: unsigned int CPU number.
*
* This function is executed on the hotplugged CPU and calls the CDMM
* driver cpu_down callback for all devices on that CPU.
*/
-static long mips_cdmm_bus_down(void *data)
+static int mips_cdmm_cpu_down_prep(unsigned int cpu)
{
struct mips_cdmm_bus *bus;
long ret;
/* Inform all the devices on the bus */
- ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, data,
+ ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, &cpu,
mips_cdmm_cpu_down_helper);
/*
@@ -623,8 +624,8 @@ static long mips_cdmm_bus_down(void *data)
}
/**
- * mips_cdmm_bus_up() - Bring up the CDMM bus.
- * @data: Pointer to unsigned int CPU number.
+ * mips_cdmm_cpu_online() - Callback for CPUHP ONLINE: Bring up the CDMM bus.
+ * @cpu: unsigned int CPU number.
*
* This work_on_cpu callback function is executed on a given CPU to discover
* CDMM devices on that CPU, or to call the CDMM driver cpu_up callback for all
@@ -634,7 +635,7 @@ static long mips_cdmm_bus_down(void *data)
* initialisation. When CPUs are brought online the function is
* invoked directly on the hotplugged CPU.
*/
-static long mips_cdmm_bus_up(void *data)
+static int mips_cdmm_cpu_online(unsigned int cpu)
{
struct mips_cdmm_bus *bus;
long ret;
@@ -651,51 +652,13 @@ static long mips_cdmm_bus_up(void *data)
mips_cdmm_bus_discover(bus);
else
/* Inform all the devices on the bus */
- ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, data,
+ ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, &cpu,
mips_cdmm_cpu_up_helper);
return ret;
}
/**
- * mips_cdmm_cpu_notify() - Take action when a CPU is going online or offline.
- * @nb: CPU notifier block .
- * @action: Event that has taken place (CPU_*).
- * @data: CPU number.
- *
- * This notifier is used to keep the CDMM buses updated as CPUs are offlined and
- * onlined. When CPUs go offline or come back online, so does their CDMM bus, so
- * devices must be informed. Also when CPUs come online for the first time the
- * devices on the CDMM bus need discovering.
- *
- * Returns: NOTIFY_OK if event was used.
- * NOTIFY_DONE if we didn't care.
- */
-static int mips_cdmm_cpu_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- unsigned int cpu = (unsigned int)data;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- case CPU_DOWN_FAILED:
- mips_cdmm_bus_up(&cpu);
- break;
- case CPU_DOWN_PREPARE:
- mips_cdmm_bus_down(&cpu);
- break;
- default:
- return NOTIFY_DONE;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block mips_cdmm_cpu_nb = {
- .notifier_call = mips_cdmm_cpu_notify,
-};
-
-/**
* mips_cdmm_init() - Initialise CDMM bus.
*
* Initialise CDMM bus, discover CDMM devices for online CPUs, and arrange for
@@ -703,7 +666,6 @@ static struct notifier_block mips_cdmm_cpu_nb = {
*/
static int __init mips_cdmm_init(void)
{
- unsigned int cpu;
int ret;
/* Register the bus */
@@ -712,19 +674,11 @@ static int __init mips_cdmm_init(void)
return ret;
/* We want to be notified about new CPUs */
- ret = register_cpu_notifier(&mips_cdmm_cpu_nb);
- if (ret) {
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "bus/cdmm:online",
+ mips_cdmm_cpu_online, mips_cdmm_cpu_down_prep);
+ if (ret < 0)
pr_warn("cdmm: Failed to register CPU notifier\n");
- goto out;
- }
-
- /* Discover devices on CDMM of online CPUs */
- for_each_online_cpu(cpu)
- work_on_cpu(cpu, mips_cdmm_bus_up, &cpu);
- return 0;
-out:
- bus_unregister(&mips_cdmm_bustype);
return ret;
}
subsys_initcall(mips_cdmm_init);
diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
index c3cb76b363c6..9efdf1de4035 100644
--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -178,6 +178,7 @@ static int vexpress_config_populate(struct device_node *node)
parent = class_find_device(vexpress_config_class, NULL, bridge,
vexpress_config_node_match);
+ of_node_put(bridge);
if (WARN_ON(!parent))
return -ENODEV;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 15:21:14 +0100