gpu: nvgpu: vgpu: support clk-arb

1. Implement the following vgpu functions to support clk-arb:
- vgpu_clk_get_range() to return min and max freqs from
supported frequencies
- implement vgpu_clk_get_round_rate() which sets rounded
rate to input rate. Rounding is handled in RM Server
- modify vgpu_clk_get_freqs() to retrieve freq table in IVM
memory instead of copying the value in array as part of cmd
message.

2. Add support for clk-arb related HALs for vgpu.

3. support_clk_freq_controller is assigned true for vgpu
provided guest VM has the privilege to set clock frequency.

Bug 200422845
Bug 2363882
Jira EVLR-3254

Change-Id: I91fc392db381c5db1d52b19d45ec0481fdc27554
Signed-off-by: Aparna Das <aparnad@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1812379
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
index e01178ed..aa2fa998 100644
--- a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
+++ b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
@@ -33,6 +33,7 @@
 #include <nvgpu/defaults.h>
 #include <nvgpu/ltc.h>
 #include <nvgpu/channel.h>
+#include <nvgpu/clk_arb.h>
 
 #include "vgpu_linux.h"
 #include "vgpu/fecs_trace_vgpu.h"
@@ -72,12 +73,19 @@ static void vgpu_remove_support(struct gk20a *g)
 static void vgpu_init_vars(struct gk20a *g, struct gk20a_platform *platform)
 {
         struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
 
         nvgpu_mutex_init(&g->power_lock);
         nvgpu_mutex_init(&g->ctxsw_disable_lock);
+        nvgpu_mutex_init(&g->clk_arb_enable_lock);
+
+        nvgpu_mutex_init(&priv->vgpu_clk_get_freq_lock);
+
         l->regs_saved = l->regs;
         l->bar1_saved = l->bar1;
 
+        nvgpu_atomic_set(&g->clk_arb_global_nr, 0);
+
         g->aggressive_sync_destroy = platform->aggressive_sync_destroy;
         g->aggressive_sync_destroy_thresh = platform->aggressive_sync_destroy_thresh;
         __nvgpu_set_enabled(g, NVGPU_HAS_SYNCPOINTS, platform->has_syncpoints);
@@ -206,6 +214,12 @@ int vgpu_pm_finalize_poweron(struct device *dev)
                 goto done;
         }
 
+        err = nvgpu_clk_arb_init_arbiter(g);
+        if (err) {
+                nvgpu_err(g, "failed to init clk arb");
+                goto done;
+        }
+
         err = g->ops.chip_init_gpu_characteristics(g);
         if (err) {
                 nvgpu_err(g, "failed to init gk20a gpu characteristics");