gpu: nvgpu: add igpu support for clk_arbiter.

This patch constructs clk_arbiter specific code for gp10b as well as
gv11b and does the necessary plumbing in the clk_arbiter code. The
changes made are as follows.

1) Constructed clk_arb_gp10b.* files which add support for clk_arb
related HALS including the nvgpu_clk_arb_init and nvgpu_clk_arb_cb.
This doesn't have support for debugfs nor the VFUpdateEvent yet and
consequently no support for arb->notifications.

2) Added gpcclk specific variables corresponding to every gpc2clk in
a given clk_arb related struct.

3) Linux specific support_clk_freq_controller is assigned true in
platform_gp10b.c and platform_gv11b.c files.

4) Incremented the clk_arb_worker.put atomic variable during
worker_deinit so as to allow the worker thread to be stopped.

5) Added the flag clk_arb_events_supported as part of struct
nvgpu_clk_arb. This flag is used to selectively account for the extra
refcounting present in OS specific code i.e.
nvgpu_clk_arb_commit_request_fd. For igpus, the extra refcount is
reduced during nvgpu_clk_arb_release_completion_dev.

Bug 2061372

Change-Id: Id00acb106db2b46e55aa0324034a16a73723c078
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1774281
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/clk_arb.h b/drivers/gpu/nvgpu/include/nvgpu/clk_arb.h
index 46952f1c..81b1df1b 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/clk_arb.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/clk_arb.h
@@ -217,6 +217,8 @@ struct nvgpu_clk_arb {
         u16 *gpc2clk_f_points;
         u32 gpc2clk_f_numpoints;
 
+        bool clk_arb_events_supported;
+
         nvgpu_atomic64_t alarm_mask;
         struct nvgpu_clk_notification_queue notification_queue;
 
diff --git a/drivers/gpu/nvgpu/include/nvgpu/gk20a.h b/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
index 5821f742..b8ca5754 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
@@ -1117,6 +1117,8 @@ struct gpu_ops {
         struct {
                 int (*arbiter_clk_init)(struct gk20a *g);
                 u32 (*get_arbiter_clk_domains)(struct gk20a *g);
+                int (*get_arbiter_f_points)(struct gk20a *g,u32 api_domain,
+                                u32 *num_points, u16 *freqs_in_mhz);
                 int (*get_arbiter_clk_range)(struct gk20a *g, u32 api_domain,
                                 u16 *min_mhz, u16 *max_mhz);
                 int (*get_arbiter_clk_default)(struct gk20a *g, u32 api_domain,