1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * 4 * (C) COPYRIGHT 2019-2021 ARM Limited. All rights reserved. 5 * 6 * This program is free software and is provided to you under the terms of the 7 * GNU General Public License version 2 as published by the Free Software 8 * Foundation, and any use by you of this program is subject to the terms 9 * of such GNU license. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, you can access it online at 18 * http://www.gnu.org/licenses/gpl-2.0.html. 19 * 20 */ 21 22 #ifndef _KBASE_CSF_TIMEOUT_H_ 23 #define _KBASE_CSF_TIMEOUT_H_ 24 25 struct kbase_device; 26 27 /** 28 * kbase_csf_timeout_init - Initialize the progress timeout. 29 * 30 * @kbdev: Instance of a GPU platform device that implements a CSF interface. 31 * Must be zero-initialized. 32 * 33 * The progress timeout is the number of GPU clock cycles allowed to elapse 34 * before the driver terminates a GPU command queue group in which a task is 35 * making no forward progress on an endpoint (e.g. a shader core). This function 36 * determines the initial value and also creates a sysfs file to allow the 37 * timeout to be reconfigured later. 38 * 39 * Reconfigures the global firmware interface to enable the current timeout. 40 * 41 * Return: 0 on success, or negative on failure. 42 */ 43 int kbase_csf_timeout_init(struct kbase_device *kbdev); 44 45 /** 46 * kbase_csf_timeout_term - Terminate the progress timeout. 47 * 48 * @kbdev: Instance of a GPU platform device that implements a CSF interface. 49 * 50 * Removes the sysfs file which allowed the timeout to be reconfigured. 51 * Does nothing if called on a zero-initialized object. 52 */ 53 void kbase_csf_timeout_term(struct kbase_device *kbdev); 54 55 /** 56 * kbase_csf_timeout_get - get the current global progress timeout. 57 * 58 * @kbdev: Instance of a GPU platform device that implements a CSF interface. 59 * 60 * Return: the maximum number of GPU cycles that is allowed to elapse without 61 * forward progress before the driver terminates a GPU command queue 62 * group. 63 */ 64 u64 kbase_csf_timeout_get(struct kbase_device *const kbdev); 65 66 #endif /* _KBASE_CSF_TIMEOUT_H_ */ 67