Commit d2e3961a authored by Jesse Zhang's avatar Jesse Zhang Committed by Alex Deucher
Browse files

drm/amdgpu: add amdgpu_sdma_sched_mask debugfs 



Userspace wants to run jobs on a specific sdma ring for verification purposes.
This debugfs entry helps to disable or enable submitting jobs to a specific ring.
This entry is populated only if there are at least two or more cores in the sdma ip.

Signed-off-by: default avatarJesse Zhang <jesse.zhang@amd.com>
Suggested-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: default avatarTim Huang <tim.huang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c5c63d9c

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -2098,6 +2098,7 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev) 
	amdgpu_debugfs_jpeg_sched_mask_init(adev);

	amdgpu_debugfs_gfx_sched_mask_init(adev);

	amdgpu_debugfs_compute_sched_mask_init(adev);

	amdgpu_debugfs_sdma_sched_mask_init(adev);



	amdgpu_ras_debugfs_create_all(adev);

	amdgpu_rap_debugfs_init(adev);

drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c

+70 −0
Original line number Diff line number Diff line
@@ -343,3 +343,73 @@ int amdgpu_sdma_ras_sw_init(struct amdgpu_device *adev) 


	return 0;

}



/*

 * debugfs for to enable/disable sdma job submission to specific core.

 */

#if defined(CONFIG_DEBUG_FS)

static int amdgpu_debugfs_sdma_sched_mask_set(void *data, u64 val)

{

	struct amdgpu_device *adev = (struct amdgpu_device *)data;

	u32 i;

	u64 mask = 0;

	struct amdgpu_ring *ring;



	if (!adev)

		return -ENODEV;



	mask = (1 << adev->sdma.num_instances) - 1;

	if ((val & mask) == 0)

		return -EINVAL;



	for (i = 0; i < adev->sdma.num_instances; ++i) {

		ring = &adev->sdma.instance[i].ring;

		if (val & (1 << i))

			ring->sched.ready = true;

		else

			ring->sched.ready = false;

	}

	/* publish sched.ready flag update effective immediately across smp */

	smp_rmb();

	return 0;

}



static int amdgpu_debugfs_sdma_sched_mask_get(void *data, u64 *val)

{

	struct amdgpu_device *adev = (struct amdgpu_device *)data;

	u32 i;

	u64 mask = 0;

	struct amdgpu_ring *ring;



	if (!adev)

		return -ENODEV;

	for (i = 0; i < adev->sdma.num_instances; ++i) {

		ring = &adev->sdma.instance[i].ring;

		if (ring->sched.ready)

			mask |= 1 << i;

	}



	*val = mask;

	return 0;

}



DEFINE_DEBUGFS_ATTRIBUTE(amdgpu_debugfs_sdma_sched_mask_fops,

			 amdgpu_debugfs_sdma_sched_mask_get,

			 amdgpu_debugfs_sdma_sched_mask_set, "%llx\n");



#endif



void amdgpu_debugfs_sdma_sched_mask_init(struct amdgpu_device *adev)

{

#if defined(CONFIG_DEBUG_FS)

	struct drm_minor *minor = adev_to_drm(adev)->primary;

	struct dentry *root = minor->debugfs_root;

	char name[32];



	if (!(adev->sdma.num_instances > 1))

		return;

	sprintf(name, "amdgpu_sdma_sched_mask");

	debugfs_create_file(name, 0600, root, adev,

			    &amdgpu_debugfs_sdma_sched_mask_fops);

#endif

}

drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h

+1 −1
Original line number Diff line number Diff line
@@ -175,5 +175,5 @@ int amdgpu_sdma_init_microcode(struct amdgpu_device *adev, u32 instance, 
void amdgpu_sdma_destroy_inst_ctx(struct amdgpu_device *adev,

        bool duplicate);

int amdgpu_sdma_ras_sw_init(struct amdgpu_device *adev);



void amdgpu_debugfs_sdma_sched_mask_init(struct amdgpu_device *adev);

#endif