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608decf1e6
Add support for powering off IGPU for switching between legacy to SMC mode/vice-versa or changing SMC configuration. The power off can be issued as follows echo 0 > /dev/nvgpu/igpu0/power The following steps are done during a poweroff. 1) Deterministic channel idle 2) Acquire write_lock on l->busy semaphore. 3) Wait till power_usage decrements to indicate 0 active jobs. 4) Invoke pm_runtime_put_sync_suspend() 5) Invoke nvgpu_gr_remove_support() to clear existing GR memory. 6) Release write_lock on l->busy 7) Deterministic channel unidle. Part of the sequence matches that of the gk20a_do_idle code. The common parts are extracted into new functions gk20a_block_new_jobs_and_idle() and gk20a_unblock_jobs() For joint-rail case, the current implementation, does a railgate and then sets pm_runtime_set_autosuspend_delay(-1) to disable regular runtime resume/suspend. Remove clearing of NVGPU_SUPPORT_MIG status during state change ias it leads to inconsistencies. Jira NVGPU-6920 Change-Id: I0b3eb3278176122ac061c1e8a94ebfb3c17c3925 Signed-off-by: Debarshi Dutta <ddutta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2578501 Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com> Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: Antony Clince Alex <aalex@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/*
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* Copyright (c) 2011-2021, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef __NVGPU_COMMON_LINUX_MODULE_H__
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#define __NVGPU_COMMON_LINUX_MODULE_H__
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struct gk20a;
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struct device;
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struct platform_device;
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struct nvgpu_os_linux;
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int gk20a_pm_finalize_poweron(struct device *dev);
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int nvgpu_finalize_poweron_linux(struct nvgpu_os_linux *l);
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void gk20a_remove_support(struct gk20a *g);
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/*
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* This method is currently only supported to allow changing
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* MIG configurations. As such only GR state and device nodes
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* are freed as part of this. Any future functionality update
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* can be made by adding more to this.
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*/
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int gk20a_driver_force_power_off(struct gk20a *g);
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void gk20a_driver_start_unload(struct gk20a *g);
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int nvgpu_quiesce(struct gk20a *g);
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int nvgpu_remove(struct device *dev);
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int nvgpu_wait_for_gpu_idle(struct gk20a *g);
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void nvgpu_free_irq(struct gk20a *g);
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struct device_node *nvgpu_get_node(struct gk20a *g);
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void __iomem *nvgpu_devm_ioremap_resource(struct platform_device *dev, int i,
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struct resource **out);
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void __iomem *nvgpu_devm_ioremap(struct device *dev, resource_size_t offset,
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resource_size_t size);
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u64 nvgpu_resource_addr(struct platform_device *dev, int i);
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extern struct class nvgpu_class;
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void gk20a_init_linux_characteristics(struct gk20a *g);
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#endif
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