From ee66559a0b3b82b3dc9be684261ddd0954731ff5 Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Wed, 18 Jun 2014 18:32:03 +0530 Subject: gpu: nvgpu: add TSG support for engine context 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 Reviewed-on: http://git-master/r/417065 Reviewed-by: Terje Bergstrom Tested-by: Terje Bergstrom --- drivers/gpu/nvgpu/gk20a/tsg_gk20a.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/gpu/nvgpu/gk20a/tsg_gk20a.h') diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h index 2530a4bd..63113b60 100644 --- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h +++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h @@ -39,6 +39,10 @@ struct tsg_gk20a { struct list_head ch_runnable_list; int num_runnable_channels; struct mutex ch_list_lock; + + struct gr_ctx_desc *tsg_gr_ctx; + + struct vm_gk20a *vm; }; #endif /* __TSG_GK20A_H_ */ -- cgit v1.2.2