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drm/amdgpu: add amdgpu_sdma_sched_mask debugfs

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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: Jesse Zhang <jesse.zhang@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Tim Huang <tim.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jesse Zhang 2024-10-29 10:14:35 +08:00 committed by Alex Deucher
parent c5c63d9cb5
commit d2e3961ae3
3 changed files with 72 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
View file

@ -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);

70
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
View file

@ -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
}

2
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
View file

@ -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