gpu: nvgpu: Add debugging to the semaphore code

Add GPU debugging to the semaphore code.

Bug 1732449
JIRA DNVGPU-12

Change-Id: I98466570cf8d234b49a7f85d88c834648ddaaaee
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1198594
(cherry picked from commit 420809cc31fcdddde32b8e59721676c67b45f592)
Reviewed-on: http://git-master/r/1153671
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
index 9c8911e9..e4972610 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c
@@ -428,9 +428,12 @@ static void add_sema_cmd(struct gk20a *g, struct channel_gk20a *c,
                          struct gk20a_semaphore *s, struct priv_cmd_entry *cmd,
                          int cmd_size, bool acquire, bool wfi)
 {
-        u32 off = cmd->off;
+        int ch = c->hw_chid;
+        u32 ob, off = cmd->off;
         u64 va;
 
+        ob = off;
+
         /*
          * RO for acquire (since we just need to read the mem) and RW for
          * release since we will need to write back to the semaphore memory.
@@ -480,6 +483,19 @@ static void add_sema_cmd(struct gk20a *g, struct channel_gk20a *c,
                 /* ignored */
                 gk20a_mem_wr32(g, cmd->mem, off++, 0);
         }
+
+        if (acquire)
+                gpu_sema_verbose_dbg("(A) c=%d ACQ_GE %-4u owner=%-3d"
+                                     "va=0x%llx cmd_mem=0x%llx b=0x%llx off=%u",
+                                     ch, gk20a_semaphore_get_value(s),
+                                     s->hw_sema->ch->hw_chid, va, cmd->gva,
+                                     cmd->mem->gpu_va, ob);
+        else
+                gpu_sema_verbose_dbg("(R) c=%d INCR %u (%u) va=0x%llx "
+                                     "cmd_mem=0x%llx b=0x%llx off=%u",
+                                     ch, gk20a_semaphore_get_value(s),
+                                     readl(s->hw_sema->value), va, cmd->gva,
+                                     cmd->mem->gpu_va, ob);
 }
 
 static int gk20a_channel_semaphore_wait_syncpt(