gpu: nvgpu: gv11b: Enable perfmon.

t19x PMU ucode uses RPC mechanism for
PERFMON commands.

- Declared  "pmu_init_perfmon",
  "pmu_perfmon_start_sampling",
  "pmu_perfmon_stop_sampling" and
  "pmu_perfmon_get_samples" in pmu ops
  to differenciate for chips using RPC & legacy
  cmd/msg mechanism.
- Defined and used PERFMON RPC commands for t19x
  	- INIT
	- START
	- STOP
	- QUERY
- Adds RPC handler for PERFMON RPC commands.
- For guerying GPU utilization/load, we need to send PERFMON_QUERY
  RPC command for gv11b.
- Enables perfmon for gv11b.

Bug 2039013

Change-Id: Ic32326f81d48f11bc772afb8fee2dee6e427a699
Signed-off-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1614114
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 32 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c b/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
index 829fee19..2811a4b0 100644
--- a/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
+++ b/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
@@ -925,8 +925,9 @@ int nvgpu_pmu_process_message(struct nvgpu_pmu *pmu)
                 nvgpu_pmu_process_init_msg(pmu, &msg);
                 if (g->ops.pmu.init_wpr_region != NULL)
                         g->ops.pmu.init_wpr_region(g);
+
                 if (nvgpu_is_enabled(g, NVGPU_PMU_PERFMON))
-                        nvgpu_pmu_init_perfmon(pmu);
+                        g->ops.pmu.pmu_init_perfmon(pmu);
 
                 return 0;
         }
@@ -978,6 +979,8 @@ static void pmu_rpc_handler(struct gk20a *g, struct pmu_msg *msg,
                 void *param, u32 handle, u32 status)
 {
         struct nv_pmu_rpc_header rpc;
+        struct nvgpu_pmu *pmu = &g->pmu;
+        struct nv_pmu_rpc_struct_perfmon_query *rpc_param;
 
         memset(&rpc, 0, sizeof(struct nv_pmu_rpc_header));
         if (param)
@@ -990,10 +993,36 @@ static void pmu_rpc_handler(struct gk20a *g, struct pmu_msg *msg,
         }
 
         switch (msg->hdr.unit_id) {
+        case PMU_UNIT_PERFMON_T18X:
+        case PMU_UNIT_PERFMON:
+                switch (rpc.function) {
+                case NV_PMU_RPC_ID_PERFMON_T18X_INIT:
+                        nvgpu_pmu_dbg(g,
+                                "reply NV_PMU_RPC_ID_PERFMON_INIT");
+                        pmu->perfmon_ready = 1;
+                        break;
+                case NV_PMU_RPC_ID_PERFMON_T18X_START:
+                        nvgpu_pmu_dbg(g,
+                                "reply NV_PMU_RPC_ID_PERFMON_START");
+                        break;
+                case NV_PMU_RPC_ID_PERFMON_T18X_STOP:
+                        nvgpu_pmu_dbg(g,
+                                "reply NV_PMU_RPC_ID_PERFMON_STOP");
+                        break;
+                case NV_PMU_RPC_ID_PERFMON_T18X_QUERY:
+                        nvgpu_pmu_dbg(g,
+                                "reply NV_PMU_RPC_ID_PERFMON_QUERY");
+                        rpc_param = (struct nv_pmu_rpc_struct_perfmon_query *)param;
+                        pmu->load = rpc_param->sample_buffer[0];
+                        pmu->perfmon_query = 1;
+                        /* set perfmon_query to 1 after load is copied */
+                        break;
+                }
+                break;
                 /* TBD case will be added */
         default:
-                        nvgpu_err(g, " Invalid RPC response, stats 0x%x",
-                                rpc.flcn_status);
+                nvgpu_err(g, " Invalid RPC response, stats 0x%x",
+                        rpc.flcn_status);
                 break;
         }