Add refcounting for TSGs and manage the refcounts as below :
- initialize ref when TSG is opened
- get ref when channel is bound to TSG
- drop the ref when channel is unbound (i.e. during channel close)
- drop the ref when TSG is closed
- when refcount drops to zero, we free the TSG
This refcounting makes it possible to close channels or TSG
in any order
Bug 1470692
Change-Id: Ia4b39164a4582c8169da62a91b9131094c67f5f8
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/495667
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Modify TSG's channel list as "ch_list" for all channels
instead of "ch_runnable_list" for only runnable list
We can traverse this list and check runnable status of
channel in active_channels to get runnable channels
Remove below APIs as they are no longer required :
gk20a_bind_runnable_channel_to_tsg()
gk20a_unbind_channel_from_tsg()
While closing the channel, call gk20a_tsg_unbind_channel()
to unbind the channel from TSG
bug 1470692
Change-Id: I0178fa74b3e8bb4e5c0b3e3b2b2f031491761ba7
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/449227
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
All channels in a TSG need to share same engine context
i.e. pointer in RAMFC of all channels in a TSG must point
to same NV_RAMIN_GR_WFI_TARGET
To get this, add a pointer to gr_ctx inside TSG struct so
that TSG can maintain its own unique gr_ctx
Also, change the type of gr_ctx in a channel to pointer
variable so that if channel is part of TSG it can point
to TSG's gr_ctx otherwise it will point to its own gr_ctx
In gk20a_alloc_obj_ctx(), allocate gr_ctx as below :
1) If channel is not part of any TSG
- allocate its own gr_ctx buffer if it is already not allocated
2) If channel is part of TSG
- Check if TSG has already allocated gr_ctx (as part of TSG)
- If yes, channel's gr_ctx will point to that of TSG's
- If not, then it means channels is first to be bounded to
this TSG
- And in this case we will allocate new gr_ctx on TSG first
and then make channel's gr_ctx to point to this gr_ctx
Also, gr_ctx will be released as below ;
1) If channels is not part of TSG, then it will be released
when channels is closed
2) Otherwise, it will be released when TSG itself is closed
Bug 1470692
Change-Id: Id347217d5b462e0e972cd3d79d17795b37034a50
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/417065
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
