gpu: nvgpu: move snapshot_client memory handling to linux

We right now store dmabuf fd and dma_buf pointer for gk20a_cs_snapshot_client
But since dma_buf and all related APIs are linux specific, we need to remove
them from common code and move them to linux specific code

Add new linux specific structure gk20a_cs_snapshot_client_linux which includes
struct gk20a_cs_snapshot_client and linux specific dma_buf pointer

In gk20a_attach_cycle_stats_snapshot(), we first handle all dma_buf related
operations and then call gr_gk20a_css_attach()

Move gk20a_channel_free_cycle_stats_snapshot() to ioctl_channel.c
In gk20a_channel_free_cycle_stats_snapshot(), we call gr_gk20a_css_detach()
and then free up dma_buf in linux specific code

We also need to call gk20a_channel_free_cycle_stats_snapshot() while closing
the channel, so call it from linux specific nvgpu_channel_close_linux()

Jira NVGPU-397
Jira NVGPU-415

Change-Id: Ida27240541f6adf31f28d7d7ee4f51651c6d3de2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1603908
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 17 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index a0415861..dac38739 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -376,22 +376,6 @@ void gk20a_channel_free_cycle_stats_buffer(struct channel_gk20a *ch)
         nvgpu_mutex_release(&ch->cyclestate.cyclestate_buffer_mutex);
 }
 
-int gk20a_channel_free_cycle_stats_snapshot(struct channel_gk20a *ch)
-{
-        int ret;
-
-        nvgpu_mutex_acquire(&ch->cs_client_mutex);
-        if (ch->cs_client) {
-                ret = gr_gk20a_css_detach(ch, ch->cs_client);
-                ch->cs_client = NULL;
-        } else {
-                ret = 0;
-        }
-        nvgpu_mutex_release(&ch->cs_client_mutex);
-
-        return ret;
-}
-
 #endif
 
 /* call ONLY when no references to the channel exist: after the last put */
@@ -508,7 +492,6 @@ static void gk20a_free_channel(struct channel_gk20a *ch, bool force)
 
 #if defined(CONFIG_GK20A_CYCLE_STATS)
         gk20a_channel_free_cycle_stats_buffer(ch);
-        gk20a_channel_free_cycle_stats_snapshot(ch);
 #endif
 
         channel_gk20a_free_priv_cmdbuf(ch);