gpu: nvgpu: Move isr related fields from gk20a

Move fields in struct gk20a related to interrupt handling into
Linux specific nvgpu_os_linux. At the same time move the counter
logic from function in HAL into Linux specific code, and two Linux
specific power management functions from generic gk20a.c to Linux
specific module.c.

JIRA NVGPU-123

Change-Id: I0a08fd2e81297c8dff7a85c263ded928496c4de0
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1528177
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sourab Gupta <sourabg@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 32 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/module.c b/drivers/gpu/nvgpu/common/linux/module.c
index d19a7a45..cbfe6ad7 100644
--- a/drivers/gpu/nvgpu/common/linux/module.c
+++ b/drivers/gpu/nvgpu/common/linux/module.c
@@ -136,6 +136,7 @@ void gk20a_idle(struct gk20a *g)
 int gk20a_pm_finalize_poweron(struct device *dev)
 {
         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, nice_value;
 
@@ -163,10 +164,10 @@ int gk20a_pm_finalize_poweron(struct device *dev)
         set_user_nice(current, -20);
 
         /* Enable interrupt workqueue */
-        if (!g->nonstall_work_queue) {
-                g->nonstall_work_queue = alloc_workqueue("%s",
+        if (!l->nonstall_work_queue) {
+                l->nonstall_work_queue = alloc_workqueue("%s",
                                                 WQ_HIGHPRI, 1, "mc_nonstall");
-                INIT_WORK(&g->nonstall_fn_work, nvgpu_intr_nonstall_cb);
+                INIT_WORK(&l->nonstall_fn_work, nvgpu_intr_nonstall_cb);
         }
 
         err = gk20a_finalize_poweron(g);
@@ -827,6 +828,34 @@ static int gk20a_pm_init(struct device *dev)
         return err;
 }
 
+/*
+ * Start the process for unloading the driver. Set NVGPU_DRIVER_IS_DYING.
+ */
+void gk20a_driver_start_unload(struct gk20a *g)
+{
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+        gk20a_dbg(gpu_dbg_shutdown, "Driver is now going down!\n");
+
+        down_write(&g->busy_lock);
+        __nvgpu_set_enabled(g, NVGPU_DRIVER_IS_DYING, true);
+        up_write(&g->busy_lock);
+
+        if (g->is_virtual)
+                return;
+
+        gk20a_wait_for_idle(dev_from_gk20a(g));
+
+        nvgpu_wait_for_deferred_interrupts(g);
+        gk20a_channel_cancel_pending_sema_waits(g);
+
+        if (l->nonstall_work_queue) {
+                cancel_work_sync(&l->nonstall_fn_work);
+                destroy_workqueue(l->nonstall_work_queue);
+                l->nonstall_work_queue = NULL;
+        }
+}
+
 static inline void set_gk20a(struct platform_device *pdev, struct gk20a *gk20a)
 {
         gk20a_get_platform(&pdev->dev)->g = gk20a;