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gpu: host1x: Retrieve syncpoint shim information

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Retrieve information for the memory syncpoint shim from the device tree
and add an interface to provide the information to other drivers.

The memory syncpoint shim is a special area on the data backbone,
where each memory page corresponds to a host1x syncpoint. Reading
the page returns the value of the syncpoint, and writing to it
increments the syncpoint by one.

Jira HOSTX-5722
Bug 4919132

Change-Id: Ie892abd754f7543fbc56844dcc40cab3f837e305
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3252025
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Santosh BS <santoshb@nvidia.com>
This commit is contained in:
Mikko Perttunen
2024-11-19 07:05:02 +00:00
committed by Jon Hunter
parent 62c37911c9
commit af2a177038
4 changed files with 69 additions and 0 deletions
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4
drivers/gpu/host1x/dev.h
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@@ -169,6 +169,10 @@ struct host1x {
struct host1x_syncpt_pool *pools;
unsigned int num_pools;
/* Syncpoint shim */
phys_addr_t shim_base;
u32 shim_stride;
struct iommu_group *group;
struct iommu_domain *domain;
struct iova_domain iova;