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gpu: nvgpu: add user API to get a syncpoint

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Add new user API NVGPU_IOCTL_CHANNEL_GET_USER_SYNCPOINT which will expose
per-channel allocated syncpoint to user space
API will also return current value of the syncpoint
On supported platforms, this API will also return a RW semaphore address
(corresponding to syncpoint shim) to user space

Add new characteristics flag NVGPU_GPU_FLAGS_SUPPORT_USER_SYNCPOINT to indicate
support for this new API
Add new flag NVGPU_SUPPORT_USER_SYNCPOINT for use of core driver

Set this flag for GV11B and GP10B for now

Add a new API (*syncpt_address) in struct gk20a_channel_sync to get GPU_VA
address of a syncpoint

Add new API nvgpu_nvhost_syncpt_read_maxval() which will read and return MAX
value of syncpoint

Bug 200326065
Jira NVGPU-179

Change-Id: I9da6f17b85996f4fc6731c0bf94fca6f3181c3e0
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1658009
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2018-02-13 04:02:38 -08:00
committed by mobile promotions
parent 180604fec0
commit 8d5536271f
10 changed files with 111 additions and 2 deletions
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6
drivers/gpu/nvgpu/common/linux/nvhost.c
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@@ -152,6 +152,12 @@ int nvgpu_nvhost_syncpt_read_ext_check(
return nvhost_syncpt_read_ext_check(nvhost_dev->host1x_pdev, id, val);
}
u32 nvgpu_nvhost_syncpt_read_maxval(
struct nvgpu_nvhost_dev *nvhost_dev, u32 id)
{
return nvhost_syncpt_read_maxval(nvhost_dev->host1x_pdev, id);
}
int nvgpu_nvhost_create_symlink(struct gk20a *g)
{
struct device *dev = dev_from_gk20a(g);