6 files changed, 36 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/module.c b/drivers/gpu/nvgpu/common/linux/module.c
index ac64041e..52f987b2 100644
--- a/drivers/gpu/nvgpu/common/linux/module.c
+++ b/drivers/gpu/nvgpu/common/linux/module.c
@@ -25,6 +25,7 @@
 #include <linux/reset.h>
 #include <linux/platform/tegra/common.h>
 
+#include <nvgpu/dma.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/nvgpu_common.h>
 #include <nvgpu/soc.h>
@@ -1026,9 +1027,16 @@ int nvgpu_remove(struct device *dev, struct class *class)
         struct gk20a *g = get_gk20a(dev);
         struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
         struct gk20a_platform *platform = gk20a_get_platform(dev);
+        int err;
 
         gk20a_dbg_fn("");
 
+        err = nvgpu_quiesce(g);
+        WARN(err, "gpu failed to idle during driver removal");
+
+        if (nvgpu_mem_is_valid(&g->syncpt_mem))
+                nvgpu_dma_free(g, &g->syncpt_mem);
+
         if (platform->has_cde)
                 gk20a_cde_destroy(l);
 
@@ -1061,7 +1069,7 @@ int nvgpu_remove(struct device *dev, struct class *class)
 
         gk20a_dbg_fn("removed");
 
-        return 0;
+        return err;
 }
 
 static int __exit gk20a_remove(struct platform_device *pdev)
diff --git a/drivers/gpu/nvgpu/common/mm/vm.c b/drivers/gpu/nvgpu/common/mm/vm.c
index 354d6ce4..f8d58349 100644
--- a/drivers/gpu/nvgpu/common/mm/vm.c
+++ b/drivers/gpu/nvgpu/common/mm/vm.c
@@ -527,6 +527,12 @@ static void __nvgpu_vm_remove(struct vm_gk20a *vm)
                 }
         }
 
+#if defined(CONFIG_TEGRA_GK20A_NVHOST) && defined(CONFIG_TEGRA_19x_GPU)
+        if (nvgpu_mem_is_valid(&g->syncpt_mem) && vm->syncpt_ro_map_gpu_va)
+                nvgpu_gmmu_unmap(vm, &g->syncpt_mem,
+                                vm->syncpt_ro_map_gpu_va);
+#endif
+
         nvgpu_mutex_acquire(&vm->update_gmmu_lock);
 
         nvgpu_rbtree_enum_start(0, &node, vm->mapped_buffers);
diff --git a/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
index 380ea048..d83684e4 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
@@ -76,9 +76,9 @@ static int gk20a_channel_syncpt_wait_syncpt(struct gk20a_channel_sync *s,
         }
 
         nvgpu_log(c->g, gpu_dbg_info, "sp->id %d gpu va %llx",
-                                        id, sp->syncpt_buf.gpu_va);
+                                        id, sp->c->vm->syncpt_ro_map_gpu_va);
         c->g->ops.fifo.add_syncpt_wait_cmd(c->g, wait_cmd, 0, id,
-                                                thresh, sp->syncpt_buf.gpu_va);
+                                        thresh, c->vm->syncpt_ro_map_gpu_va);
 
         return 0;
 }
@@ -147,7 +147,7 @@ static int gk20a_channel_syncpt_wait_fd(struct gk20a_channel_sync *s, int fd,
                                         wait_id, sp->syncpt_buf.gpu_va);
                         c->g->ops.fifo.add_syncpt_wait_cmd(c->g, wait_cmd,
                                 i * wait_cmd_size, wait_id, wait_value,
-                                sp->syncpt_buf.gpu_va);
+                                c->vm->syncpt_ro_map_gpu_va);
                 }
         }
 
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index d1ad5992..cac62db7 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -154,6 +154,9 @@ int gk20a_finalize_poweron(struct gk20a *g)
 {
         struct gk20a_platform *platform = gk20a_get_platform(dev_from_gk20a(g));
         int err;
+#if defined(CONFIG_TEGRA_GK20A_NVHOST) && defined(CONFIG_TEGRA_19x_GPU)
+        u32 nr_pages;
+#endif
 
         gk20a_dbg_fn("");
 
@@ -346,6 +349,14 @@ int gk20a_finalize_poweron(struct gk20a *g)
                 }
         }
 
+#if defined(CONFIG_TEGRA_GK20A_NVHOST) && defined(CONFIG_TEGRA_19x_GPU)
+        if (gk20a_platform_has_syncpoints(g) && g->syncpt_unit_size) {
+                nr_pages = DIV_ROUND_UP(g->syncpt_unit_size, PAGE_SIZE);
+                __nvgpu_mem_create_from_phys(g, &g->syncpt_mem,
+                                g->syncpt_unit_base, nr_pages);
+        }
+#endif
+
 done:
         if (err)
                 g->power_on = false;
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 72e47ec6..a45a7b4e 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -1293,6 +1293,7 @@ struct gk20a {
         size_t          syncpt_unit_size;
         u32             syncpt_size;
 #endif
+        struct nvgpu_mem syncpt_mem;
 };
 
 static inline unsigned long gk20a_get_gr_idle_timeout(struct gk20a *g)
diff --git a/drivers/gpu/nvgpu/include/nvgpu/vm.h b/drivers/gpu/nvgpu/include/nvgpu/vm.h
index 4c5d3232..f8868065 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/vm.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/vm.h
@@ -175,6 +175,12 @@ struct vm_gk20a {
          * Each address space needs to have a semaphore pool.
          */
         struct nvgpu_semaphore_pool *sema_pool;
+
+        /*
+         * Create sync point read only map for sync point range.
+         * Channels sharing same vm will also share same sync point ro map
+         */
+        u64 syncpt_ro_map_gpu_va;
 };
 
 void nvgpu_vm_get(struct vm_gk20a *vm);