gpu: nvgpu: Add MC HAL is_intr1_pending

Add MC HAL is_intr1_pending. At the same time introduce nvgpu_unit
that is passed as parameter to is_intr1_pending. The API is passed
contents of intr1 register and an engine number, and returns true
if there's an interrupt pending for the engine.

JIRA NVGPU-26

Change-Id: I8e6363dd78572f8e41dbab2b258036ed168b6f75
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1497870
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/mc_gp10b.c b/drivers/gpu/nvgpu/gp10b/mc_gp10b.c
index bfc7a3d4..7ccea370 100644
--- a/drivers/gpu/nvgpu/gp10b/mc_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/mc_gp10b.c
@@ -19,6 +19,7 @@
 #include "mc_gp10b.h"
 
 #include <nvgpu/atomic.h>
+#include <nvgpu/unit.h>
 
 #include <nvgpu/hw/gp10b/hw_mc_gp10b.h>
 
@@ -169,6 +170,30 @@ void mc_gp10b_intr_stall_resume(struct gk20a *g)
                         g->ops.mc.intr_mask_restore[NVGPU_MC_INTR_STALLING]);
 }
 
+static bool mc_gp10b_is_intr1_pending(struct gk20a *g,
+                                      enum nvgpu_unit unit, u32 mc_intr_1)
+{
+        u32 mask = 0;
+        bool is_pending;
+
+        switch (unit) {
+        case NVGPU_UNIT_FIFO:
+                mask = mc_intr_pfifo_pending_f();
+                break;
+        default:
+                break;
+        }
+
+        if (mask == 0) {
+                nvgpu_err(g, "unknown unit %d", unit);
+                is_pending = false;
+        } else {
+                is_pending = (mc_intr_1 & mask) ? true : false;
+        }
+
+        return is_pending;
+}
+
 void gp10b_init_mc(struct gpu_ops *gops)
 {
         gops->mc.intr_enable = mc_gp10b_intr_enable;
@@ -184,4 +209,5 @@ void gp10b_init_mc(struct gpu_ops *gops)
         gops->mc.disable = gk20a_mc_disable;
         gops->mc.reset = gk20a_mc_reset;
         gops->mc.boot_0 = gk20a_mc_boot_0;
+        gops->mc.is_intr1_pending = mc_gp10b_is_intr1_pending;
 }