gpu: nvgpu: Move ctxsw_trace_gk20a.c to common/linux

Migrate ctxsw_trace_gk20a.c to common/linux/ctxsw_trace.c. This
has been done becasue the ctxsw tracing code is currently too
tightly tied to the Linux OS due to usage of a couple system calls:

  - poll()
  - mmap()

And general Linux driver framework code. As a result pulling the
logic out of the FECS tracing code is simply too large a scope for
time time being.

Instead the code was just copied as much as possible. The HAL ops
for the FECS code was hidden behind the FECS tracing config so
that the vm_area_struct is not used when QNX does not define said
config. All other non-HAL functions called by the FECS ctxsw
tracing code ha now also been hidden by this config. This is not
pretty but for the time being it seems like the way to go.

JIRA NVGPU-287

Change-Id: Ib880ab237f4abd330dc66998692c86c4507149c2
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1586547
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index d7fdffb0..a34f06b2 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -689,18 +689,25 @@ struct gpu_ops {
                 int (*get_netlist_name)(struct gk20a *g, int index, char *name);
                 bool (*is_fw_defined)(void);
         } gr_ctx;
+#ifdef CONFIG_GK20A_CTXSW_TRACE
+        /*
+         * Currently only supported on Linux due to the extremely tight
+         * integration with Linux device driver structure (in particular
+         * mmap).
+         */
         struct {
                 int (*init)(struct gk20a *g);
                 int (*max_entries)(struct gk20a *,
-                        struct nvgpu_ctxsw_trace_filter *);
+                        struct nvgpu_ctxsw_trace_filter *filter);
                 int (*flush)(struct gk20a *g);
                 int (*poll)(struct gk20a *g);
                 int (*enable)(struct gk20a *g);
                 int (*disable)(struct gk20a *g);
                 bool (*is_enabled)(struct gk20a *g);
                 int (*reset)(struct gk20a *g);
-                int (*bind_channel)(struct gk20a *, struct channel_gk20a *);
-                int (*unbind_channel)(struct gk20a *, struct channel_gk20a *);
+                int (*bind_channel)(struct gk20a *g, struct channel_gk20a *ch);
+                int (*unbind_channel)(struct gk20a *g,
+                                        struct channel_gk20a *ch);
                 int (*deinit)(struct gk20a *g);
                 int (*alloc_user_buffer)(struct gk20a *g,
                                         void **buf, size_t *size);
@@ -710,6 +717,7 @@ struct gpu_ops {
                 int (*set_filter)(struct gk20a *g,
                         struct nvgpu_ctxsw_trace_filter *filter);
         } fecs_trace;
+#endif
         struct {
                 bool (*support_sparse)(struct gk20a *g);
                 u64 (*gmmu_map)(struct vm_gk20a *vm,