gpu: nvgpu: Add semaphore debugging info

Add semaphore debugging information to the gk20a channel state
debug dump.

Bug 1732449
JIRA DNVGPU-12

Change-Id: I7caafd4f6420e1c478be22e236513603c315ce5e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1198592
(cherry picked from commit 3fa247adf5fdd8c9b16a24fec00903fdc3abc90a)
Reviewed-on: http://git-master/r/1133793
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/debug_gk20a.c b/drivers/gpu/nvgpu/gk20a/debug_gk20a.c
index 5b06d35c..93580a7f 100644
--- a/drivers/gpu/nvgpu/gk20a/debug_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/debug_gk20a.c
@@ -25,6 +25,7 @@
 
 #include "gk20a.h"
 #include "debug_gk20a.h"
+#include "semaphore_gk20a.h"
 
 #include "hw_ram_gk20a.h"
 #include "hw_fifo_gk20a.h"
@@ -109,6 +110,11 @@ static void gk20a_debug_show_channel(struct gk20a *g,
         u32 status = ccsr_channel_status_v(channel);
         u32 syncpointa, syncpointb;
         u32 *inst_mem;
+        struct channel_gk20a *c = g->fifo.channel + hw_chid;
+        struct gk20a_semaphore_int *hw_sema = NULL;
+
+        if (c->hw_sema)
+                hw_sema = c->hw_sema;
 
         if (!ch_state)
                 return;
@@ -145,6 +151,12 @@ static void gk20a_debug_show_channel(struct gk20a *g,
                 inst_mem[ram_fc_semaphoreb_w()],
                 inst_mem[ram_fc_semaphorec_w()],
                 inst_mem[ram_fc_semaphored_w()]);
+        if (hw_sema)
+                gk20a_debug_output(o, "SEMA STATE: value: 0x%08x "
+                                   "next_val: 0x%08x addr: 0x%010llx\n",
+                                   readl(hw_sema->value),
+                                   atomic_read(&hw_sema->next_value),
+                                   gk20a_hw_sema_addr(hw_sema));
 
 #ifdef CONFIG_TEGRA_GK20A
         if ((pbdma_syncpointb_op_v(syncpointb) == pbdma_syncpointb_op_wait_v())