gpu: nvgpu: allocate from coherent pool

Maps memory coherently on devices that are connected to a coherent bus.

(1) Add code to be able to get the platform device node.
(2) Create a new flag to mark if the device is connected to a coherent bus
(3) Map memory coherently on coherent devices.

bug 2040331

Change-Id: Ide83a9261acdbbc6e9fef4fc5f38d6f9d0e5ab5b
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1633985
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
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, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/module.h b/drivers/gpu/nvgpu/common/linux/module.h
index 90dba804..934c895d 100644
--- a/drivers/gpu/nvgpu/common/linux/module.h
+++ b/drivers/gpu/nvgpu/common/linux/module.h
@@ -28,6 +28,7 @@ void gk20a_driver_start_unload(struct gk20a *g);
 int nvgpu_quiesce(struct gk20a *g);
 int nvgpu_remove(struct device *dev, struct class *class);
 void nvgpu_free_irq(struct gk20a *g);
+struct device_node *nvgpu_get_node(struct gk20a *g);
 
 extern struct class nvgpu_class;