gpu: nvgpu: Use timer API in gm20b code

Use the timer API instead of Linux specific APIs for handling
timeouts.

Also, lower the L2 timeout from 1 second (absurdly long) to 5ms.

Bug 1799159

Change-Id: I27dbc35b12e9bc22ff2207bb87543f76203e20f1
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1273825
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 17 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
index ca8fbaee..8f5d1e10 100644
--- a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
@@ -1,7 +1,7 @@
 /*
  * GM20B MMU
  *
- * Copyright (c) 2014-2016, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2017, 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,
@@ -20,6 +20,8 @@
 
 #include "mm_gm20b.h"
 
+#include <nvgpu/timers.h>
+
 #include <nvgpu/hw/gm20b/hw_gmmu_gm20b.h>
 #include <nvgpu/hw/gm20b/hw_fb_gm20b.h>
 #include <nvgpu/hw/gm20b/hw_gr_gm20b.h>
@@ -27,28 +29,23 @@
 #include <nvgpu/hw/gm20b/hw_bus_gm20b.h>
 
 static int gm20b_mm_mmu_vpr_info_fetch_wait(struct gk20a *g,
-                const unsigned int msec)
+                                            unsigned int msec)
 {
-        unsigned long timeout;
+        struct nvgpu_timeout timeout;
 
-        if (tegra_platform_is_silicon())
-                timeout = jiffies + msecs_to_jiffies(msec);
-        else
-                timeout = msecs_to_jiffies(msec);
+        nvgpu_timeout_init(g, &timeout, msec, NVGPU_TIMER_CPU_TIMER);
 
-        while (1) {
+        do {
                 u32 val;
+
                 val = gk20a_readl(g, fb_mmu_vpr_info_r());
                 if (fb_mmu_vpr_info_fetch_v(val) ==
-                                fb_mmu_vpr_info_fetch_false_v())
-                        break;
-                if (tegra_platform_is_silicon()) {
-                        if (WARN_ON(time_after(jiffies, timeout)))
-                                return -ETIME;
-                } else if (--timeout == 0)
-                        return -ETIME;
-        }
-        return 0;
+                    fb_mmu_vpr_info_fetch_false_v())
+                        return 0;
+
+        } while (!nvgpu_timeout_expired(&timeout));
+
+        return -ETIMEDOUT;
 }
 
 int gm20b_mm_mmu_vpr_info_fetch(struct gk20a *g)