gpu: nvgpu: Dump offending push buffer fragment

When outputting debug dump, print the contents of current push buffer
segment.

Also changes the debug dump to use pr_cont when applicable, and dumps
state before recovering in case channel was not loaded to an engine.

Bug 1498688

Change-Id: I5ca12f64bae8f12333d82350278c700645d5007e
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/422198

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 0f805214..486e815c 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -929,6 +929,21 @@ static void channel_gk20a_free_priv_cmdbuf(struct channel_gk20a *c)
         memset(q, 0, sizeof(struct priv_cmd_queue));
 }
 
+int gk20a_find_from_priv_cmdbuf(struct channel_gk20a *c,
+                                u64 gpu_va, u32 **cpu_va)
+{
+        struct priv_cmd_queue *q = &c->priv_cmd_q;
+        int ret;
+
+        if (gpu_va >= q->base_gpuva && gpu_va < (q->base_gpuva + q->size)) {
+                *cpu_va = gpu_va - q->base_gpuva + q->mem.base_cpuva;
+                ret = 0;
+        } else
+                ret = -EINVAL;
+
+        return ret;
+}
+
 /* allocate a cmd buffer with given size. size is number of u32 entries */
 int gk20a_channel_alloc_priv_cmdbuf(struct channel_gk20a *c, u32 orig_size,
                              struct priv_cmd_entry **entry)