gpu: nvgpu: support for dumping vpr/wpr info

Added support for dumping vpr/wpr info for gm20b.
This dump info called when ever gk20a_mm_fb_flush
is timed-out.

Bug 200082817

Change-Id: I21b0372d0e3f976a189c9c428c015165b715bf88
Signed-off-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/711439
(cherry picked from commit b69897d71c8f6119b49ceb8d3273cdb354178cc5)
Reviewed-on: http://git-master/r/712675
GVS: Gerrit_Virtual_Submit
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>

1 files changed, 31 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/fb_gm20b.c b/drivers/gpu/nvgpu/gm20b/fb_gm20b.c
index deef7896..666d27e9 100644
--- a/drivers/gpu/nvgpu/gm20b/fb_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/fb_gm20b.c
@@ -1,7 +1,7 @@
 /*
  * GM20B GPC MMU
  *
- * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2015, 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,
@@ -95,11 +95,41 @@ static int gm20b_fb_compression_page_size(struct gk20a *g)
         return SZ_128K;
 }
 
+static void gm20b_fb_dump_vpr_wpr_info(struct gk20a *g)
+{
+        u32 val;
+
+        /* print vpr and wpr info */
+        val = gk20a_readl(g, fb_mmu_vpr_info_r());
+        val &= ~0x3;
+        val |= fb_mmu_vpr_info_index_addr_lo_v();
+        gk20a_writel(g, fb_mmu_vpr_info_r(), val);
+        gk20a_err(dev_from_gk20a(g), "VPR: %08x %08x %08x %08x",
+                gk20a_readl(g, fb_mmu_vpr_info_r()),
+                gk20a_readl(g, fb_mmu_vpr_info_r()),
+                gk20a_readl(g, fb_mmu_vpr_info_r()),
+                gk20a_readl(g, fb_mmu_vpr_info_r()));
+
+        val = gk20a_readl(g, fb_mmu_wpr_info_r());
+        val &= ~0xf;
+        val |= (fb_mmu_wpr_info_index_allow_read_v());
+        gk20a_writel(g, fb_mmu_wpr_info_r(), val);
+        gk20a_err(dev_from_gk20a(g), "WPR: %08x %08x %08x %08x %08x %08x",
+                gk20a_readl(g, fb_mmu_wpr_info_r()),
+                gk20a_readl(g, fb_mmu_wpr_info_r()),
+                gk20a_readl(g, fb_mmu_wpr_info_r()),
+                gk20a_readl(g, fb_mmu_wpr_info_r()),
+                gk20a_readl(g, fb_mmu_wpr_info_r()),
+                gk20a_readl(g, fb_mmu_wpr_info_r()));
+
+}
+
 void gm20b_init_fb(struct gpu_ops *gops)
 {
         gops->fb.init_fs_state = fb_gm20b_init_fs_state;
         gops->fb.set_mmu_page_size = gm20b_fb_set_mmu_page_size;
         gops->fb.compression_page_size = gm20b_fb_compression_page_size;
+        gops->fb.dump_vpr_wpr_info = gm20b_fb_dump_vpr_wpr_info;
         gm20b_init_uncompressed_kind_map();
         gm20b_init_kind_attr();
 }