1 files changed, 16 insertions, 12 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
index 4359f282..1a780212 100644
--- a/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
@@ -3,7 +3,7 @@
  *
  * GK20A Graphics
  *
- * Copyright (c) 2011-2014, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2011-2015, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -19,6 +19,7 @@
  */
 
 #include <linux/kernel.h>
+#include <trace/events/gk20a.h>
 
 #include "hw_ltc_gk20a.h"
 #include "hw_proj_gk20a.h"
@@ -107,15 +108,15 @@ static int gk20a_ltc_cbc_ctrl(struct gk20a *g, enum gk20a_cbc_op op,
         int err = 0;
         struct gr_gk20a *gr = &g->gr;
         u32 fbp, slice, ctrl1, val, hw_op = 0;
-        unsigned long end_jiffies = jiffies +
-                msecs_to_jiffies(gk20a_get_gr_idle_timeout(g));
-        u32 delay = GR_IDLE_CHECK_DEFAULT;
+        u32  retry = 200;
         u32 slices_per_fbp =
                 ltc_ltcs_ltss_cbc_param_slices_per_fbp_v(
                         gk20a_readl(g, ltc_ltcs_ltss_cbc_param_r()));
 
         gk20a_dbg_fn("");
 
+        trace_gk20a_ltc_cbc_ctrl_start(g->dev->name, op, min, max);
+
         if (gr->compbit_store.size == 0)
                 return 0;
 
@@ -141,25 +142,23 @@ static int gk20a_ltc_cbc_ctrl(struct gk20a *g, enum gk20a_cbc_op op,
         for (fbp = 0; fbp < gr->num_fbps; fbp++) {
                 for (slice = 0; slice < slices_per_fbp; slice++) {
 
-                        delay = GR_IDLE_CHECK_DEFAULT;
 
                         ctrl1 = ltc_ltc0_lts0_cbc_ctrl1_r() +
                                 fbp * proj_ltc_stride_v() +
                                 slice * proj_lts_stride_v();
 
+                        retry = 200;
                         do {
                                 val = gk20a_readl(g, ctrl1);
                                 if (!(val & hw_op))
                                         break;
+                                retry--;
+                                udelay(5);
 
-                                usleep_range(delay, delay * 2);
-                                delay = min_t(u32, delay << 1,
-                                        GR_IDLE_CHECK_MAX);
-
-                        } while (time_before(jiffies, end_jiffies) ||
+                        } while (retry >= 0 ||
                                         !tegra_platform_is_silicon());
 
-                        if (!time_before(jiffies, end_jiffies)) {
+                        if (retry < 0 && tegra_platform_is_silicon()) {
                                 gk20a_err(dev_from_gk20a(g),
                                            "comp tag clear timeout\n");
                                 err = -EBUSY;
@@ -168,6 +167,7 @@ static int gk20a_ltc_cbc_ctrl(struct gk20a *g, enum gk20a_cbc_op op,
                 }
         }
 out:
+        trace_gk20a_ltc_cbc_ctrl_done(g->dev->name);
         mutex_unlock(&g->mm.l2_op_lock);
         return 0;
 }
@@ -200,6 +200,8 @@ static void gk20a_mm_g_elpg_flush_locked(struct gk20a *g)
 
         gk20a_dbg_fn("");
 
+        trace_gk20a_mm_g_elpg_flush_locked(g->dev->name);
+
         /* Make sure all previous writes are committed to the L2. There's no
            guarantee that writes are to DRAM. This will be a sysmembar internal
            to the L2. */
@@ -212,7 +214,7 @@ static void gk20a_mm_g_elpg_flush_locked(struct gk20a *g)
                     ltc_ltc0_ltss_g_elpg_flush_pending_v()) {
                         gk20a_dbg_info("g_elpg_flush 0x%x", data);
                         retry--;
-                        usleep_range(20, 40);
+                        udelay(5);
                 } else
                         break;
         } while (retry >= 0 || !tegra_platform_is_silicon());
@@ -221,6 +223,8 @@ static void gk20a_mm_g_elpg_flush_locked(struct gk20a *g)
                 gk20a_warn(dev_from_gk20a(g),
                             "g_elpg_flush too many retries");
 
+        trace_gk20a_mm_g_elpg_flush_locked_done(g->dev->name);
+
 }
 
 static int gk20a_determine_L2_size_bytes(struct gk20a *g)