drm/nouveau/gsp: add hal for gsp.sr_data_size()

570.86.15 uses a slightly different calculation for the size of the
sysmem buffer needed to store GSP-RM's vidmem data across suspend.

Signed-off-by: Ben Skeggs <[email protected]>
Reviewed-by: Dave Airlie <[email protected]>
Reviewed-by: Timur Tabi <[email protected]>
Tested-by: Timur Tabi <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

Author: Ben Skeggs

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gsp.c

@@ -1700,15 +1700,22 @@ nvkm_gsp_radix3_sg(struct nvkm_gsp *gsp, struct sg_table *sgt, u64 size,
 	return ret;
 }
 
+static u32
+r535_gsp_sr_data_size(struct nvkm_gsp *gsp)
+{
+	GspFwWprMeta *meta = gsp->wpr_meta.data;
+
+	return meta->gspFwWprEnd - meta->gspFwWprStart;
+}
+
 int
 r535_gsp_fini(struct nvkm_gsp *gsp, bool suspend)
 {
 	struct nvkm_rm *rm = gsp->rm;
 	int ret;
 
 	if (suspend) {
-		GspFwWprMeta *meta = gsp->wpr_meta.data;
-		u64 len = meta->gspFwWprEnd - meta->gspFwWprStart;
+		u32 len = rm->api->gsp->sr_data_size(gsp);
 		GspFwSRMeta *sr;
 
 		ret = nvkm_gsp_sg(gsp->subdev.device, len, &gsp->sr.sgt);
@@ -2167,4 +2174,5 @@ r535_gsp = {
 	.get_static_info = r535_gsp_get_static_info,
 	.xlat_mc_engine_idx = r535_gsp_xlat_mc_engine_idx,
 	.drop_send_user_shared_data = r535_gsp_drop_send_user_shared_data,
+	.sr_data_size = r535_gsp_sr_data_size,
 };

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h

@@ -34,6 +34,7 @@ struct nvkm_rm_api {
 		int (*get_static_info)(struct nvkm_gsp *);
 		bool (*xlat_mc_engine_idx)(u32 mc_engine_idx, enum nvkm_subdev_type *, int *inst);
 		void (*drop_send_user_shared_data)(struct nvkm_gsp *);
+		u32 (*sr_data_size)(struct nvkm_gsp *);
 	} *gsp;
 
 	const struct nvkm_rm_api_rpc {