gpu: nvgpu: support kernel-3.10 version

Make necessary changes to support nvgpu on kernel-3.10

This includes below changes
- PROBE_PREFER_ASYNCHRONOUS is defined only for K3.10
- Fence handling and struct sync_fence is different between
  K3.10 and K3.18
- variable status in struct sync_fence is atomic on K3.18
  whereas it is int on K3.10
- if SOC == T132, set soc_name = "tegra13x"
- ioremap_cache() is not defined on K3.10 ARM versions,
  hence use ioremap_cached()

Bug 200188753

Change-Id: I18d77eb1404e15054e8510d67c9a61c0f1883e2b
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1121092
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/sync_gk20a.c b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
index 87d905dd..21622d3d 100644
--- a/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
@@ -15,6 +15,7 @@
 
 #include "sync_gk20a.h"
 
+#include <linux/version.h>
 #include <linux/kernel.h>
 #include <linux/file.h>
 #include <linux/fs.h>
@@ -149,7 +150,11 @@ static struct gk20a_sync_pt *gk20a_sync_pt_create_shared(
 
         /* Store the dependency fence for this pt. */
         if (dependency) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
+                if (dependency->status == 0) {
+#else
                 if (!atomic_read(&dependency->status)) {
+#endif
                         shared->dep = dependency;
                 } else {
                         shared->dep_timestamp = ktime_get();
@@ -214,6 +219,9 @@ static int gk20a_sync_pt_has_signaled(struct sync_pt *sync_pt)
 {
         struct gk20a_sync_pt *pt = to_gk20a_sync_pt(sync_pt);
         struct gk20a_sync_timeline *obj = pt->obj;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
+        struct sync_pt *pos;
+#endif
         bool signaled = true;
 
         spin_lock(&pt->lock);
@@ -233,6 +241,12 @@ static int gk20a_sync_pt_has_signaled(struct sync_pt *sync_pt)
                  * first.*/
                 if (pt->dep) {
                         s64 ns = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
+                        struct list_head *dep_pts = &pt->dep->pt_list_head;
+                        list_for_each_entry(pos, dep_pts, pt_list) {
+                                ns = max(ns, ktime_to_ns(pos->timestamp));
+                        }
+#else
                         struct fence *fence;
                         int i;
 
@@ -240,6 +254,7 @@ static int gk20a_sync_pt_has_signaled(struct sync_pt *sync_pt)
                                 fence = pt->dep->cbs[i].sync_pt;
                                 ns = max(ns, ktime_to_ns(fence->timestamp));
                         }
+#endif
                         pt->dep_timestamp = ns_to_ktime(ns);
                         sync_fence_put(pt->dep);
                         pt->dep = NULL;
@@ -260,7 +275,11 @@ static inline ktime_t gk20a_sync_pt_duration(struct sync_pt *sync_pt)
         struct gk20a_sync_pt *pt = to_gk20a_sync_pt(sync_pt);
         if (!gk20a_sync_pt_has_signaled(sync_pt) || !pt->dep_timestamp.tv64)
                 return ns_to_ktime(0);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
+        return ktime_sub(sync_pt->timestamp, pt->dep_timestamp);
+#else
         return ktime_sub(sync_pt->base.timestamp, pt->dep_timestamp);
+#endif
 }
 
 static int gk20a_sync_pt_compare(struct sync_pt *a, struct sync_pt *b)