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Commit 38e57d7a authored by Harshdeep Dhatt's avatar Harshdeep Dhatt
Browse files

msm: kgsl: Enable A6XX preemption through sysfs 



This patch enables the a6xx preemption buffers setup by default.
However, the preemption execution is only enabled by:

echo 1 > /sys/class/kgsl/kgsl-3d0/preemption

Change-Id: I32c513fd5213f949ab6bc99fafbe71dc6a6f332b
Signed-off-by: default avatarHarshdeep Dhatt <hdhatt@codeaurora.org>
parent 9a78128f

drivers/gpu/msm/adreno.c

+1 −2
Original line number Diff line number Diff line
@@ -1333,8 +1333,7 @@ static int adreno_init(struct kgsl_device *device) 


	}



	if (nopreempt == false &&

		ADRENO_FEATURE(adreno_dev, ADRENO_PREEMPTION)) {

	if (nopreempt == false) {

		int r = 0;



		if (gpudev->preemption_init)

drivers/gpu/msm/adreno.h

+15 −2
Original line number Diff line number Diff line
@@ -528,6 +528,7 @@ enum adreno_device_flags { 
	ADRENO_DEVICE_ISDB_ENABLED = 12,

	ADRENO_DEVICE_CACHE_FLUSH_TS_SUSPENDED = 13,

	ADRENO_DEVICE_HARD_RESET = 14,

	ADRENO_DEVICE_PREEMPTION_EXECUTION = 15,

};



/**
@@ -1550,11 +1551,23 @@ static inline void adreno_set_preempt_state(struct adreno_device *adreno_dev, 
	smp_wmb();

}



static inline bool adreno_is_preemption_enabled(

static inline bool adreno_is_preemption_execution_enabled(

				struct adreno_device *adreno_dev)

{

	return test_bit(ADRENO_DEVICE_PREEMPTION_EXECUTION, &adreno_dev->priv);

}



static inline bool adreno_is_preemption_setup_enabled(

				struct adreno_device *adreno_dev)

{

	return test_bit(ADRENO_DEVICE_PREEMPTION, &adreno_dev->priv);

}



static inline bool adreno_is_preemption_enabled(

				struct adreno_device *adreno_dev)

{

	return 0;

}

/**

 * adreno_ctx_get_rb() - Return the ringbuffer that a context should

 * use based on priority
@@ -1578,7 +1591,7 @@ static inline struct adreno_ringbuffer *adreno_ctx_get_rb( 
	 * ringbuffer

	 */



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_execution_enabled(adreno_dev))

		return &(adreno_dev->ringbuffers[0]);



	/*

drivers/gpu/msm/adreno_a6xx.c

+3 −3
Original line number Diff line number Diff line
@@ -567,7 +567,7 @@ static void a6xx_start(struct adreno_device *adreno_dev) 
		kgsl_regrmw(device, A6XX_PC_DBG_ECO_CNTL, 0, (1 << 8));



	/* Enable the GMEM save/restore feature for preemption */

	if (adreno_is_preemption_enabled(adreno_dev))

	if (adreno_is_preemption_setup_enabled(adreno_dev))

		kgsl_regwrite(device, A6XX_RB_CONTEXT_SWITCH_GMEM_SAVE_RESTORE,

			0x1);
@@ -773,7 +773,7 @@ static int a6xx_post_start(struct adreno_device *adreno_dev) 
	struct adreno_ringbuffer *rb = adreno_dev->cur_rb;

	struct kgsl_device *device = KGSL_DEVICE(adreno_dev);



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_execution_enabled(adreno_dev))

		return 0;



	cmds = adreno_ringbuffer_allocspace(rb, 42);
@@ -2295,7 +2295,7 @@ static void a6xx_cp_callback(struct adreno_device *adreno_dev, int bit) 
{

	struct kgsl_device *device = KGSL_DEVICE(adreno_dev);



	if (adreno_is_preemption_enabled(adreno_dev))

	if (adreno_is_preemption_execution_enabled(adreno_dev))

		a6xx_preemption_trigger(adreno_dev);



	adreno_dispatcher_schedule(device);

drivers/gpu/msm/adreno_a6xx_preempt.c

+4 −4
Original line number Diff line number Diff line
@@ -360,7 +360,7 @@ void a6xx_preemption_schedule(struct adreno_device *adreno_dev) 
{

	struct kgsl_device *device = KGSL_DEVICE(adreno_dev);



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_execution_enabled(adreno_dev))

		return;



	mutex_lock(&device->mutex);
@@ -453,7 +453,7 @@ void a6xx_preemption_start(struct adreno_device *adreno_dev) 
	struct adreno_ringbuffer *rb;

	unsigned int i;



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_execution_enabled(adreno_dev))

		return;



	/* Force the state to be clear */
@@ -631,7 +631,7 @@ void a6xx_preemption_context_destroy(struct kgsl_context *context) 
	struct kgsl_device *device = context->device;

	struct adreno_device *adreno_dev = ADRENO_DEVICE(device);



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_setup_enabled(adreno_dev))

		return;



	gpumem_free_entry(context->user_ctxt_record);
@@ -642,7 +642,7 @@ int a6xx_preemption_context_init(struct kgsl_context *context) 
	struct kgsl_device *device = context->device;

	struct adreno_device *adreno_dev = ADRENO_DEVICE(device);



	if (!adreno_is_preemption_enabled(adreno_dev))

	if (!adreno_is_preemption_setup_enabled(adreno_dev))

		return 0;



	context->user_ctxt_record = gpumem_alloc_entry(context->dev_priv,

drivers/gpu/msm/adreno_dispatch.c

+1 −1
Original line number Diff line number Diff line
@@ -2139,7 +2139,7 @@ static int dispatcher_do_fault(struct adreno_device *adreno_dev) 
	 * Deleting uninitialized timer will block for ever on kernel debug

	 * disable build. Hence skip del timer if it is not initialized.

	 */

	if (adreno_is_preemption_enabled(adreno_dev))

	if (adreno_is_preemption_execution_enabled(adreno_dev))

		del_timer_sync(&adreno_dev->preempt.timer);



	mutex_lock(&device->mutex);