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Commit 4ab35b19 authored by Harshdeep Dhatt's avatar Harshdeep Dhatt
Browse files

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



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: default avatarHarshdeep Dhatt <hdhatt@codeaurora.org>
parent ade6ec4d

drivers/gpu/msm/adreno.h

+2 −0
Original line number Diff line number Diff line
@@ -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;

};

drivers/gpu/msm/adreno_a6xx_preempt.c

+2 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/gpu/msm/adreno_sysfs.c

+19 −0
Original line number Diff line number Diff line
@@ -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,

};