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msm: kgsl: Add sysfs node to track number of preemptions

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This sysfs node will show the number of preemptions triggered
by kgsl. This comes handy when we want to check if preemptions
are happening or not.

Change-Id: I1ef924899d2f7abbc3fdeb976de17f96fa76b680
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>
This commit is contained in:
Harshdeep Dhatt 2017-11-16 08:34:39 -07:00
commit 4ab35b19e6
3 changed files with 23 additions and 0 deletions
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2
drivers/gpu/msm/adreno.h
View file

@ -270,6 +270,7 @@ enum adreno_preempt_states {
* preempt_level: The level of preemption (for 6XX)
* skipsaverestore: To skip saverestore during L1 preemption (for 6XX)
* usesgmem: enable GMEM save/restore across preemption (for 6XX)
* count: Track the number of preemptions triggered
*/
struct adreno_preemption {
atomic_t state;
@ -280,6 +281,7 @@ struct adreno_preemption {
unsigned int preempt_level;
bool skipsaverestore;
bool usesgmem;
unsigned int count;
};

2
drivers/gpu/msm/adreno_a6xx_preempt.c
View file

@ -292,6 +292,8 @@ void a6xx_preemption_trigger(struct adreno_device *adreno_dev)
kgsl_sharedmem_writel(device, &next->preemption_desc,
PREEMPT_RECORD(wptr), next->wptr);
preempt->count++;
spin_unlock_irqrestore(&next->preempt_lock, flags);
/* And write it to the smmu info */

19
drivers/gpu/msm/adreno_sysfs.c
View file

@ -29,6 +29,13 @@ struct adreno_sysfs_attribute adreno_attr_##_name = { \
.store = _ ## _name ## _store, \
}
#define _ADRENO_SYSFS_ATTR_RO(_name, __show) \
struct adreno_sysfs_attribute adreno_attr_##_name = { \
.attr = __ATTR(_name, 0644, __show, NULL), \
.show = _ ## _name ## _show, \
.store = NULL, \
}
#define ADRENO_SYSFS_ATTR(_a) \
container_of((_a), struct adreno_sysfs_attribute, attr)
@ -331,6 +338,13 @@ static unsigned int _ifpc_show(struct adreno_device *adreno_dev)
return kgsl_gmu_isenabled(device) && gmu->idle_level >= GPU_HW_IFPC;
}
static unsigned int _preempt_count_show(struct adreno_device *adreno_dev)
{
struct adreno_preemption *preempt = &adreno_dev->preempt;
return preempt->count;
}
static ssize_t _sysfs_store_u32(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@ -411,9 +425,13 @@ static ssize_t _sysfs_show_bool(struct device *dev,
#define ADRENO_SYSFS_U32(_name) \
_ADRENO_SYSFS_ATTR(_name, _sysfs_show_u32, _sysfs_store_u32)
#define ADRENO_SYSFS_RO_U32(_name) \
_ADRENO_SYSFS_ATTR_RO(_name, _sysfs_show_u32)
static ADRENO_SYSFS_U32(ft_policy);
static ADRENO_SYSFS_U32(ft_pagefault_policy);
static ADRENO_SYSFS_U32(preempt_level);
static ADRENO_SYSFS_RO_U32(preempt_count);
static ADRENO_SYSFS_BOOL(usesgmem);
static ADRENO_SYSFS_BOOL(skipsaverestore);
static ADRENO_SYSFS_BOOL(ft_long_ib_detect);
@ -451,6 +469,7 @@ static const struct device_attribute *_attr_list[] = {
&adreno_attr_usesgmem.attr,
&adreno_attr_skipsaverestore.attr,
&adreno_attr_ifpc.attr,
&adreno_attr_preempt_count.attr,
NULL,
};