gpu: nvgpu: Per-chip PBDMA signature

PBDMA HW signature depends on the chip.

Change-Id: If57d721d9bb77a090f967930a1aa2037bf4a16fe
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/672922

drivers/gpu/nvgpu/gk20a/channel_gk20a.c

@@ -192,7 +192,7 @@ int channel_gk20a_setup_ramfc(struct channel_gk20a *c,
 		pbdma_gp_base_hi_limit2_f(ilog2(gpfifo_entries)));
 
 	gk20a_mem_wr32(inst_ptr, ram_fc_signature_w(),
-		 pbdma_signature_hw_valid_f() | pbdma_signature_sw_zero_f());
+		 c->g->ops.fifo.get_pbdma_signature(c->g));
 
 	gk20a_mem_wr32(inst_ptr, ram_fc_formats_w(),
 		pbdma_formats_gp_fermi0_f() |

drivers/gpu/nvgpu/gk20a/fifo_gk20a.c

@@ -2154,6 +2154,11 @@ static u32 gk20a_fifo_get_num_fifos(struct gk20a *g)
 	return ccsr_channel__size_1_v();
 }
 
+u32 gk20a_fifo_get_pbdma_signature(struct gk20a *g)
+{
+	return pbdma_signature_hw_valid_f() | pbdma_signature_sw_zero_f();
+}
+
 void gk20a_init_fifo(struct gpu_ops *gops)
 {
 	gk20a_init_channel(gops);
@@ -2163,4 +2168,5 @@ void gk20a_init_fifo(struct gpu_ops *gops)
 	gops->fifo.apply_pb_timeout = gk20a_fifo_apply_pb_timeout;
 	gops->fifo.wait_engine_idle = gk20a_fifo_wait_engine_idle;
 	gops->fifo.get_num_fifos = gk20a_fifo_get_num_fifos;
+	gops->fifo.get_pbdma_signature = gk20a_fifo_get_pbdma_signature;
 }

drivers/gpu/nvgpu/gk20a/fifo_gk20a.h

@@ -170,4 +170,6 @@ void fifo_gk20a_finish_mmu_fault_handling(struct gk20a *g,
 		unsigned long fault_id);
 int gk20a_fifo_wait_engine_idle(struct gk20a *g);
 u32 gk20a_fifo_engine_interrupt_mask(struct gk20a *g);
+u32 gk20a_fifo_get_pbdma_signature(struct gk20a *g);
+
 #endif /*__GR_GK20A_H__*/

drivers/gpu/nvgpu/gk20a/gk20a.h

@@ -212,6 +212,7 @@ struct gpu_ops {
 		void (*apply_pb_timeout)(struct gk20a *g);
 		int (*wait_engine_idle)(struct gk20a *g);
 		u32 (*get_num_fifos)(struct gk20a *g);
+		u32 (*get_pbdma_signature)(struct gk20a *g);
 	} fifo;
 	struct pmu_v {
 		/*used for change of enum zbc update cmd id from ver 0 to ver1*/

drivers/gpu/nvgpu/gm20b/fifo_gm20b.c

@@ -118,4 +118,5 @@ void gm20b_init_fifo(struct gpu_ops *gops)
 	gops->fifo.trigger_mmu_fault = gm20b_fifo_trigger_mmu_fault;
 	gops->fifo.wait_engine_idle = gk20a_fifo_wait_engine_idle;
 	gops->fifo.get_num_fifos = gm20b_fifo_get_num_fifos;
+	gops->fifo.get_pbdma_signature = gk20a_fifo_get_pbdma_signature;
 }