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arm-cci: simplify sysfs attr handling

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There's no need to dynamically initialise attribute pointers when we can
get the compiler to do it for us. We also don't need a dev_ext_attribute
for the cpumask, as the drvdata for a PMU device is a pointer to struct
pmu.

Cc: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2016-02-23 10:49:43 +00:00 committed by Will Deacon
parent da4e4f18af
commit 5e442eba34
1 changed files with 25 additions and 75 deletions
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100
drivers/bus/arm-cci.c
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@ -121,10 +121,8 @@ struct cci_pmu_model {
u32 fixed_hw_cntrs;
u32 num_hw_cntrs;
u32 cntr_size;
u64 nformat_attrs;
u64 nevent_attrs;
struct dev_ext_attribute *format_attrs;
struct dev_ext_attribute *event_attrs;
struct attribute **format_attrs;
struct attribute **event_attrs;
struct event_range event_ranges[CCI_IF_MAX];
int (*validate_hw_event)(struct cci_pmu *, unsigned long);
int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long);
@ -166,8 +164,10 @@ static ssize_t cci_pmu_format_show(struct device *dev,
static ssize_t cci_pmu_event_show(struct device *dev,
struct device_attribute *attr, char *buf);
#define CCI_EXT_ATTR_ENTRY(_name, _func, _config) \
{ __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config }
#define CCI_EXT_ATTR_ENTRY(_name, _func, _config) \
&((struct dev_ext_attribute[]) { \
{ __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config } \
})[0].attr.attr
#define CCI_FORMAT_EXT_ATTR_ENTRY(_name, _config) \
CCI_EXT_ATTR_ENTRY(_name, cci_pmu_format_show, (char *)_config)
@ -242,12 +242,13 @@ enum cci400_perf_events {
static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
struct device_attribute *attr, char *buf);
static struct dev_ext_attribute cci400_pmu_format_attrs[] = {
static struct attribute *cci400_pmu_format_attrs[] = {
CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-7"),
NULL
};
static struct dev_ext_attribute cci400_r0_pmu_event_attrs[] = {
static struct attribute *cci400_r0_pmu_event_attrs[] = {
/* Slave events */
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
@ -279,9 +280,10 @@ static struct dev_ext_attribute cci400_r0_pmu_event_attrs[] = {
CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_tt_full, 0x1A),
/* Special event for cycles counter */
CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
NULL
};
static struct dev_ext_attribute cci400_r1_pmu_event_attrs[] = {
static struct attribute *cci400_r1_pmu_event_attrs[] = {
/* Slave events */
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
@ -325,6 +327,7 @@ static struct dev_ext_attribute cci400_r1_pmu_event_attrs[] = {
CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_unique_or_line_unique_addr_hazard, 0x11),
/* Special event for cycles counter */
CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
NULL
};
static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
@ -480,12 +483,13 @@ static inline struct cci_pmu_model *probe_cci_model(struct platform_device *pdev
static ssize_t cci500_pmu_global_event_show(struct device *dev,
struct device_attribute *attr, char *buf);
static struct dev_ext_attribute cci500_pmu_format_attrs[] = {
static struct attribute *cci500_pmu_format_attrs[] = {
CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-8"),
NULL,
};
static struct dev_ext_attribute cci500_pmu_event_attrs[] = {
static struct attribute *cci500_pmu_event_attrs[] = {
/* Slave events */
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_arvalid, 0x0),
CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_dev, 0x1),
@ -546,6 +550,7 @@ static struct dev_ext_attribute cci500_pmu_event_attrs[] = {
CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snopp_rq_stall_tt_full, 0xE),
CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
NULL
};
static ssize_t cci500_pmu_global_event_show(struct device *dev,
@ -1176,9 +1181,8 @@ static int cci_pmu_event_init(struct perf_event *event)
static ssize_t pmu_cpumask_attr_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dev_ext_attribute *eattr = container_of(attr,
struct dev_ext_attribute, attr);
struct cci_pmu *cci_pmu = eattr->var;
struct pmu *pmu = dev_get_drvdata(dev);
struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
int n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
cpumask_pr_args(&cci_pmu->cpus));
@ -1187,13 +1191,11 @@ static ssize_t pmu_cpumask_attr_show(struct device *dev,
return n;
}
static struct dev_ext_attribute pmu_cpumask_attr = {
__ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL),
NULL, /* Populated in cci_pmu_init */
};
static struct device_attribute pmu_cpumask_attr =
__ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL);
static struct attribute *pmu_attrs[] = {
&pmu_cpumask_attr.attr.attr,
&pmu_cpumask_attr.attr,
NULL,
};
@ -1218,60 +1220,14 @@ static const struct attribute_group *pmu_attr_groups[] = {
NULL
};
static struct attribute **alloc_attrs(struct platform_device *pdev,
int n, struct dev_ext_attribute *source)
{
int i;
struct attribute **attrs;
/* Alloc n + 1 (for terminating NULL) */
attrs = devm_kcalloc(&pdev->dev, n + 1, sizeof(struct attribute *),
GFP_KERNEL);
if (!attrs)
return attrs;
for(i = 0; i < n; i++)
attrs[i] = &source[i].attr.attr;
return attrs;
}
static int cci_pmu_init_attrs(struct cci_pmu *cci_pmu, struct platform_device *pdev)
{
const struct cci_pmu_model *model = cci_pmu->model;
struct attribute **attrs;
/*
* All allocations below are managed, hence doesn't need to be
* free'd explicitly in case of an error.
*/
if (model->nevent_attrs) {
attrs = alloc_attrs(pdev, model->nevent_attrs,
model->event_attrs);
if (!attrs)
return -ENOMEM;
pmu_event_attr_group.attrs = attrs;
}
if (model->nformat_attrs) {
attrs = alloc_attrs(pdev, model->nformat_attrs,
model->format_attrs);
if (!attrs)
return -ENOMEM;
pmu_format_attr_group.attrs = attrs;
}
pmu_cpumask_attr.var = cci_pmu;
return 0;
}
static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
{
char *name = cci_pmu->model->name;
const struct cci_pmu_model *model = cci_pmu->model;
char *name = model->name;
u32 num_cntrs;
int rc;
rc = cci_pmu_init_attrs(cci_pmu, pdev);
if (rc)
return rc;
pmu_event_attr_group.attrs = model->event_attrs;
pmu_format_attr_group.attrs = model->format_attrs;
cci_pmu->pmu = (struct pmu) {
.name = cci_pmu->model->name,
@ -1336,9 +1292,7 @@ static struct cci_pmu_model cci_pmu_models[] = {
.num_hw_cntrs = 4,
.cntr_size = SZ_4K,
.format_attrs = cci400_pmu_format_attrs,
.nformat_attrs = ARRAY_SIZE(cci400_pmu_format_attrs),
.event_attrs = cci400_r0_pmu_event_attrs,
.nevent_attrs = ARRAY_SIZE(cci400_r0_pmu_event_attrs),
.event_ranges = {
[CCI_IF_SLAVE] = {
CCI400_R0_SLAVE_PORT_MIN_EV,
@ -1358,9 +1312,7 @@ static struct cci_pmu_model cci_pmu_models[] = {
.num_hw_cntrs = 4,
.cntr_size = SZ_4K,
.format_attrs = cci400_pmu_format_attrs,
.nformat_attrs = ARRAY_SIZE(cci400_pmu_format_attrs),
.event_attrs = cci400_r1_pmu_event_attrs,
.nevent_attrs = ARRAY_SIZE(cci400_r1_pmu_event_attrs),
.event_ranges = {
[CCI_IF_SLAVE] = {
CCI400_R1_SLAVE_PORT_MIN_EV,
@ -1382,9 +1334,7 @@ static struct cci_pmu_model cci_pmu_models[] = {
.num_hw_cntrs = 8,
.cntr_size = SZ_64K,
.format_attrs = cci500_pmu_format_attrs,
.nformat_attrs = ARRAY_SIZE(cci500_pmu_format_attrs),
.event_attrs = cci500_pmu_event_attrs,
.nevent_attrs = ARRAY_SIZE(cci500_pmu_event_attrs),
.event_ranges = {
[CCI_IF_SLAVE] = {
CCI500_SLAVE_PORT_MIN_EV,