nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-24 10:34:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: add interface to power on-off gpu

Browse Source 
The power rail of dGPU is managed with help of a set of
GPIOs. Using those GPIOs add an interface to power off and
power on dGPU.

Before dGPU is powered off, new work is blocked by setting
NVGPU_DRIVER_IS_DYING and current jobs are allowed to finish
by waiting for gpu to be idle.

The tegra PCIe controller driver provided APIs
tegra_pcie_attach_controller() and tegra_pcie_detach_controller()
are used to manage PCIe link shutdown, PCIe refclk management
and PCIe rescan.

JIRA NVGPU-1100

Change-Id: Ifae5b81535f40dceca5292a987d3daf6984f3210
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1749847
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nitin Kumbhar
2018-06-14 17:27:47 +05:30
committed by Abdul Salam
parent 334f5869c9
commit 237af3ef86
7 changed files with 603 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/gpu/nvgpu/os/linux/module.c
View File

@@ -1100,6 +1100,38 @@ static int gk20a_pm_deinit(struct device *dev)
return 0;
}
int nvgpu_start_gpu_idle(struct gk20a *g)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
down_write(&l->busy_lock);
/*
* Set NVGPU_DRIVER_IS_DYING to avoid gpu being marked
* busy to submit new work to gpu.
*/
__nvgpu_set_enabled(g, NVGPU_DRIVER_IS_DYING, true);
up_write(&l->busy_lock);
return 0;
}
int nvgpu_wait_for_gpu_idle(struct gk20a *g)
{
int ret = 0;
ret = gk20a_wait_for_idle(g);
if (ret) {
nvgpu_err(g, "failed in wait for idle");
goto out;
}
nvgpu_wait_for_deferred_interrupts(g);
out:
return ret;
}
/*
* Start the process for unloading the driver. Set NVGPU_DRIVER_IS_DYING.
*/