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gpu: nvgpu: Add configurable comptag_mem_deduct sysfs node per device

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Adding a comptag_mem_deduct in the platform_gk20a has certain problems:
1) It's not really convenient for platform users to configure it.
2) All products using the same GPU have to share the same configuration.

So this patch moves this comptag_mem_deduct from struct platform_gk20a
to struct gr_gk20a (per device). And it adds an sysfs node for products
or platform users to easily configure from user space.

Note: The comptag memory will not be allocated until the GPU driver goes
through the final poweron routine. So the user space has a small window
to configure this sysfs node.

Bug 2327574
Bug 2284925

Change-Id: Ie7d00b082704e422645c0ea254b59e22f9fc3b7f
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1810334
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nicolin Chen
2018-08-30 14:52:16 -07:00
committed by mobile promotions
parent bd47d00ce7
commit 9e4bbd2c9b
4 changed files with 45 additions and 15 deletions
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6
drivers/gpu/nvgpu/os/linux/platform_gk20a.h
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@@ -272,12 +272,6 @@ struct gk20a_platform {
/* stream id to use */
u32 ltc_streamid;
/*
* The deductible memory size for max_comptag_mem (in MBytes)
* Usually close to memory size that running system is taking
*/
u32 comptag_mem_deduct;
/* scaling rate */
unsigned long cached_rate;
};