gpu: nvgpu: add kernel APIs for TSG support

Add support to create/destroy TSGs using node "/dev/nvhost-tsg-gpu"

Provide below IOCTLs to bind/unbind channels to/from TSGs :

NVGPU_TSG_IOCTL_BIND_CHANNEL
NVGPU_TSG_IOCTL_UNBIND_CHANNEL

Bug 1470692

Change-Id: Iaf9f16a522379eb943906624548f8d28fc6d4486
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/416610

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 3c0611e6..e9febb77 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -538,6 +538,8 @@ static int gk20a_init_fifo_setup_sw(struct gk20a *g)
 
         f->channel = kzalloc(f->num_channels * sizeof(*f->channel),
                                 GFP_KERNEL);
+        f->tsg = kzalloc(f->num_channels * sizeof(*f->tsg),
+                                GFP_KERNEL);
         f->pbdma_map = kzalloc(f->num_pbdma * sizeof(*f->pbdma_map),
                                 GFP_KERNEL);
         f->engine_info = kzalloc(f->max_engines * sizeof(*f->engine_info),
@@ -566,8 +568,10 @@ static int gk20a_init_fifo_setup_sw(struct gk20a *g)
                         f->userd.gpu_va + chid * f->userd_entry_size;
 
                 gk20a_init_channel_support(g, chid);
+                gk20a_init_tsg_support(g, chid);
         }
         mutex_init(&f->ch_inuse_mutex);
+        mutex_init(&f->tsg_inuse_mutex);
 
         f->remove_support = gk20a_remove_fifo_support;