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>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c b/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
index 001f2bfc..87fc6a1f 100644
--- a/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
@@ -31,6 +31,13 @@ u32 gp106_get_arbiter_clk_domains(struct gk20a *g)
         return (CTRL_CLK_DOMAIN_MCLK|CTRL_CLK_DOMAIN_GPC2CLK);
 }
 
+int gp106_get_arbiter_f_points(struct gk20a *g,u32 api_domain,
+                                u32 *num_points, u16 *freqs_in_mhz)
+{
+        return g->ops.clk.clk_domain_get_f_points(g,
+                api_domain, num_points, freqs_in_mhz);
+}
+
 int gp106_get_arbiter_clk_range(struct gk20a *g, u32 api_domain,
                 u16 *min_mhz, u16 *max_mhz)
 {
@@ -129,6 +136,8 @@ int gp106_init_clk_arbiter(struct gk20a *g)
         if (!arb)
                 return -ENOMEM;
 
+        arb->clk_arb_events_supported = true;
+
         err = nvgpu_mutex_init(&arb->pstate_lock);
         if (err)
                 goto mutex_fail;