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@xxxxxxx>
Suggested-by:Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 71 +++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 2 +-
3 files changed, 73 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 6e3f657cab9c..c446bfccea59 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index 183a976ba29d..cacb12a4fa9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -343,3 +343,74 @@ 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
+}
+
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 087ce0f6fa07..a37fcd9bb981 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -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
--
2.25.1
