drm/v3d: Add support for submitting jobs to the TFU.

The TFU can copy from raster, UIF, and SAND input images to UIF output
images, with optional mipmap generation.  This will certainly be
useful for media EGL image input, but is also useful immediately for
mipmap generation without bogging the V3D core down.

For now we only run the queue 1 job deep, and don't have any hang
recovery (though I don't think we should need it, with TFU).  Queuing
multiple jobs in the HW will require synchronizing the YUV coefficient
regs updates since they don't get FIFOed with the job.

v2: Change the ioctl to IOW instead of IOWR, always set COEF0, explain
    why TFU is AUTH, clarify the syncing docs, drop the unused TFU
    interrupt regs (you're expected to use the hub's), don't take
    &bo->base for NULL bos.
v3: Fix a little whitespace alignment (noticed by checkpatch), rebase
    on drm_sched_job_cleanup() changes.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Dave Emett <david.emett@broadcom.com> (v2)
Link: https://patchwork.freedesktop.org/patch/264607/

1 files changed, 27 insertions, 5 deletions

diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index cbe5be0c47eb..dcb772a19191 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -7,19 +7,18 @@
 #include <drm/drm_encoder.h>
 #include <drm/drm_gem.h>
 #include <drm/gpu_scheduler.h>
+#include "uapi/drm/v3d_drm.h"
 
 #define GMP_GRANULARITY (128 * 1024)
 
-/* Enum for each of the V3D queues.  We maintain various queue
- * tracking as an array because at some point we'll want to support
- * the TFU (texture formatting unit) as another queue.
- */
+/* Enum for each of the V3D queues. */
 enum v3d_queue {
 	V3D_BIN,
 	V3D_RENDER,
+	V3D_TFU,
 };
 
-#define V3D_MAX_QUEUES (V3D_RENDER + 1)
+#define V3D_MAX_QUEUES (V3D_TFU + 1)
 
 struct v3d_queue_state {
 	struct drm_gpu_scheduler sched;
@@ -68,6 +67,7 @@ struct v3d_dev {
 
 	struct v3d_exec_info *bin_job;
 	struct v3d_exec_info *render_job;
+	struct v3d_tfu_job *tfu_job;
 
 	struct v3d_queue_state queue[V3D_MAX_QUEUES];
 
@@ -218,6 +218,25 @@ struct v3d_exec_info {
 	u32 qma, qms, qts;
 };
 
+struct v3d_tfu_job {
+	struct drm_sched_job base;
+
+	struct drm_v3d_submit_tfu args;
+
+	/* An optional fence userspace can pass in for the job to depend on. */
+	struct dma_fence *in_fence;
+
+	/* v3d fence to be signaled by IRQ handler when the job is complete. */
+	struct dma_fence *done_fence;
+
+	struct v3d_dev *v3d;
+
+	struct kref refcount;
+
+	/* This is the array of BOs that were looked up at the start of exec. */
+	struct v3d_bo *bo[4];
+};
+
 /**
  * _wait_for - magic (register) wait macro
  *
@@ -281,9 +300,12 @@ int v3d_gem_init(struct drm_device *dev);
 void v3d_gem_destroy(struct drm_device *dev);
 int v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
+int v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv);
 int v3d_wait_bo_ioctl(struct drm_device *dev, void *data,
 		      struct drm_file *file_priv);
 void v3d_exec_put(struct v3d_exec_info *exec);
+void v3d_tfu_job_put(struct v3d_tfu_job *exec);
 void v3d_reset(struct v3d_dev *v3d);
 void v3d_invalidate_caches(struct v3d_dev *v3d);
 void v3d_flush_caches(struct v3d_dev *v3d);