gpu: nvgpu: add remove_gr_sysfs gpu op

Add remove_gr_sys() op to gpu_ops to reverse steps
done in create_gr_sysfs().

Make gv11b_tegra_remove() specific to gv11b instead
to properly remove sysfs nodes. This also helps in
having gv11b specific remove steps.

Also, update platform remove function of dGPU i.e.
nvgpu_pci_tegra_remove() to remove sysfs nodes. This
adds parity with iGPU platform remove.

Bug 1987855

Change-Id: Ibbaffac5c24346709347f86444a951461894354d
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1735987
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

4 files changed, 35 insertions, 14 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/pci.c b/drivers/gpu/nvgpu/common/linux/pci.c
index 6b3f1092..6caf5ad9 100644
--- a/drivers/gpu/nvgpu/common/linux/pci.c
+++ b/drivers/gpu/nvgpu/common/linux/pci.c
@@ -52,6 +52,11 @@ static int nvgpu_pci_tegra_probe(struct device *dev)
 
 static int nvgpu_pci_tegra_remove(struct device *dev)
 {
+        struct gk20a *g = get_gk20a(dev);
+
+        if (g->ops.gr.remove_gr_sysfs)
+                g->ops.gr.remove_gr_sysfs(g);
+
         return 0;
 }
 
diff --git a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
index 5d7ee84d..a2506341 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
+++ b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
@@ -67,8 +67,6 @@ static struct {
         {"gpu", GPCCLK_INIT_RATE},
         {"gpu_sys", 204000000} };
 
-static void gr_gp10b_remove_sysfs(struct device *dev);
-
 /*
  * gp10b_tegra_get_clocks()
  *
@@ -174,9 +172,12 @@ static int gp10b_tegra_late_probe(struct device *dev)
         return 0;
 }
 
-int gp10b_tegra_remove(struct device *dev)
+static int gp10b_tegra_remove(struct device *dev)
 {
-        gr_gp10b_remove_sysfs(dev);
+        struct gk20a *g = get_gk20a(dev);
+
+        if (g->ops.gr.remove_gr_sysfs)
+                g->ops.gr.remove_gr_sysfs(g);
 
         /* deinitialise tegra specific scaling quirks */
         gp10b_tegra_scale_exit(dev);
@@ -792,9 +793,9 @@ void gr_gp10b_create_sysfs(struct gk20a *g)
                 dev_err(dev, "Failed to create sysfs attributes!\n");
 }
 
-static void gr_gp10b_remove_sysfs(struct device *dev)
+void gr_gp10b_remove_sysfs(struct gk20a *g)
 {
-        struct gk20a *g = get_gk20a(dev);
+        struct device *dev = dev_from_gk20a(g);
 
         if (!g->ecc.gr.sm_lrf_single_err_count.counters)
                 return;
diff --git a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.h b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.h
index 05832e87..725bd0cf 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.h
+++ b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2017-2018, 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,
@@ -43,6 +43,4 @@ void gp10b_ecc_stat_remove(struct device *dev,
                                 struct gk20a_ecc_stat *ecc_stat,
                                 struct device_attribute *dev_attr_array);
 
-int gp10b_tegra_remove(struct device *dev);
-
 #endif
diff --git a/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c b/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
index df760478..f681fe4b 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
+++ b/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
@@ -44,7 +44,15 @@
 #include "platform_gk20a_tegra.h"
 #include "gv11b/gr_gv11b.h"
 
-static void gr_gv11b_remove_sysfs(struct device *dev);
+static void gv11b_tegra_scale_exit(struct device *dev)
+{
+        struct gk20a_platform *platform = gk20a_get_platform(dev);
+        struct gk20a_scale_profile *profile = platform->g->scale_profile;
+
+        if (profile)
+                tegra_bwmgr_unregister(
+                        (struct tegra_bwmgr_client *)profile->private_data);
+}
 
 static int gv11b_tegra_probe(struct device *dev)
 {
@@ -82,11 +90,19 @@ static int gv11b_tegra_late_probe(struct device *dev)
         return 0;
 }
 
+
 static int gv11b_tegra_remove(struct device *dev)
 {
-        gp10b_tegra_remove(dev);
+        struct gk20a *g = get_gk20a(dev);
+
+        if (g->ops.gr.remove_gr_sysfs)
+                g->ops.gr.remove_gr_sysfs(g);
+
+        gv11b_tegra_scale_exit(dev);
 
-        gr_gv11b_remove_sysfs(dev);
+#ifdef CONFIG_TEGRA_GK20A_NVHOST
+        nvgpu_free_nvhost_dev(get_gk20a(dev));
+#endif
 
         return 0;
 }
@@ -498,12 +514,13 @@ void gr_gv11b_create_sysfs(struct gk20a *g)
                 dev_err(dev, "Failed to create gv11b sysfs attributes!\n");
 }
 
-static void gr_gv11b_remove_sysfs(struct device *dev)
+void gr_gv11b_remove_sysfs(struct gk20a *g)
 {
-        struct gk20a *g = get_gk20a(dev);
+        struct device *dev = dev_from_gk20a(g);
 
         if (!g->ecc.gr.sm_l1_tag_corrected_err_count.counters)
                 return;
+        gr_gp10b_remove_sysfs(g);
 
         gr_gp10b_ecc_stat_remove(dev,
                         0,