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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>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/*
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* Copyright (c) 2018, 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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NVGPU_PCI_POWER_H
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#define NVGPU_PCI_POWER_H
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#include <linux/version.h>
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#include <linux/pci.h>
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#define NVGPU_POWER_OFF 0
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#define NVGPU_POWER_ON 1
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int nvgpu_pci_set_powerstate(char *dev_name, int powerstate);
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int nvgpu_pci_add_pci_power(struct pci_dev *pdev);
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int nvgpu_pci_clear_pci_power(const char *dev_name);
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void *tegra_pcie_detach_controller(struct pci_dev *pdev);
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int tegra_pcie_attach_controller(void *cookie);
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int __init nvgpu_pci_power_init(struct pci_driver *nvgpu_pci_driver);
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void __exit nvgpu_pci_power_exit(struct pci_driver *nvgpu_pci_driver);
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void __exit nvgpu_pci_power_cleanup(void);
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#endif
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