drm/amd: Add SDMA functions to kfd-->kgd interface

This patch adds three new functions to the kfd2kgd interface:

- hqd_sdma_load() - Loads SDMA mqd to a H/W SDMA hqd slot. Used only in no HWS
                    mode.

- hqd_sdma_is_occupied() - Checks if an SDMA hqd slot is occupied. Used only
                           in no HWS mode.

- hqd_sdma_destroy() - Destructs and preempts the SDMA queue assigned to
                       that SDMA hqd slot. Used only in no HWS mode.

These functions are needed to support SDMA queues scheduling when using no HWS
mode (used for debug or bring-up).

v2: Removed init_sdma_engines() from interface. Initialization is done in
radeon.

Signed-off-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/kgd_kfd_interface.h

@@ -144,10 +144,18 @@ struct kgd2kfd_calls {
  * @hqd_load: Loads the mqd structure to a H/W hqd slot. used only for no cp
  * sceduling mode.
  *
+ * @hqd_sdma_load: Loads the SDMA mqd structure to a H/W SDMA hqd slot.
+ * used only for no HWS mode.
+ *
  * @hqd_is_occupies: Checks if a hqd slot is occupied.
  *
  * @hqd_destroy: Destructs and preempts the queue assigned to that hqd slot.
  *
+ * @hqd_sdma_is_occupied: Checks if an SDMA hqd slot is occupied.
+ *
+ * @hqd_sdma_destroy: Destructs and preempts the SDMA queue assigned to that
+ * SDMA hqd slot.
+ *
  * @get_fw_version: Returns FW versions from the header
  *
  * This structure contains function pointers to services that the kgd driver
@@ -183,18 +191,26 @@ struct kfd2kgd_calls {
 	int (*hqd_load)(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
 			uint32_t queue_id, uint32_t __user *wptr);
 
+	int (*hqd_sdma_load)(struct kgd_dev *kgd, void *mqd);
+
 	bool (*hqd_is_occupies)(struct kgd_dev *kgd, uint64_t queue_address,
 				uint32_t pipe_id, uint32_t queue_id);
 
 	int (*hqd_destroy)(struct kgd_dev *kgd, uint32_t reset_type,
 				unsigned int timeout, uint32_t pipe_id,
 				uint32_t queue_id);
+
+	bool (*hqd_sdma_is_occupied)(struct kgd_dev *kgd, void *mqd);
+
+	int (*hqd_sdma_destroy)(struct kgd_dev *kgd, void *mqd,
+				unsigned int timeout);
+
 	uint16_t (*get_fw_version)(struct kgd_dev *kgd,
 				enum kgd_engine_type type);
 };
 
 bool kgd2kfd_init(unsigned interface_version,
-		  const struct kfd2kgd_calls *f2g,
-		  const struct kgd2kfd_calls **g2f);
+		const struct kfd2kgd_calls *f2g,
+		const struct kgd2kfd_calls **g2f);
 
-#endif /* KGD_KFD_INTERFACE_H_INCLUDED */
+#endif	/* KGD_KFD_INTERFACE_H_INCLUDED */