drm/v3d: Create a CPU job extension for a indirect CSD job

A CPU job is a type of job that performs operations that requires CPU
intervention. An indirect CSD job is a job that, when executed in the
queue, will map the indirect buffer, read the dispatch parameters, and
submit a regular dispatch. Therefore, it is a job that needs CPU
intervention.

So, create a user extension for the CPU job that enables the creation
of an indirect CSD. This user extension will allow the creation of a CSD
job linked to a CPU job. The CPU job will wait for the indirect CSD job
dependencies and, once they are signaled, it will update the CSD job
parameters.

Co-developed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130164420.932823-14-mcanal@igalia.com

1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index 39d62915cdd6..202c0d4b04a5 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -316,12 +316,41 @@ struct v3d_csd_job {
 	struct drm_v3d_submit_csd args;
 };
 
-enum v3d_cpu_job_type {};
+enum v3d_cpu_job_type {
+	V3D_CPU_JOB_TYPE_INDIRECT_CSD = 1,
+};
+
+struct v3d_indirect_csd_info {
+	/* Indirect CSD */
+	struct v3d_csd_job *job;
+
+	/* Clean cache job associated to the Indirect CSD job */
+	struct v3d_job *clean_job;
+
+	/* Offset within the BO where the workgroup counts are stored */
+	u32 offset;
+
+	/* Workgroups size */
+	u32 wg_size;
+
+	/* Indices of the uniforms with the workgroup dispatch counts
+	 * in the uniform stream.
+	 */
+	u32 wg_uniform_offsets[3];
+
+	/* Indirect BO */
+	struct drm_gem_object *indirect;
+
+	/* Context of the Indirect CSD job */
+	struct ww_acquire_ctx acquire_ctx;
+};
 
 struct v3d_cpu_job {
 	struct v3d_job base;
 
 	enum v3d_cpu_job_type job_type;
+
+	struct v3d_indirect_csd_info indirect_csd;
 };
 
 typedef void (*v3d_cpu_job_fn)(struct v3d_cpu_job *);