| /* |
| * |
| * (C) COPYRIGHT 2014,2019-2020 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU licence. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| * SPDX-License-Identifier: GPL-2.0 |
| * |
| */ |
| |
| |
| |
| /* |
| * Backend-specific HW access device APIs |
| */ |
| |
| #ifndef _KBASE_DEVICE_INTERNAL_H_ |
| #define _KBASE_DEVICE_INTERNAL_H_ |
| |
| /** |
| * kbase_reg_write - write to GPU register |
| * @kbdev: Kbase device pointer |
| * @offset: Offset of register |
| * @value: Value to write |
| * |
| * Caller must ensure the GPU is powered (@kbdev->pm.gpu_powered != false). |
| */ |
| void kbase_reg_write(struct kbase_device *kbdev, u32 offset, u32 value); |
| |
| /** |
| * kbase_reg_read - read from GPU register |
| * @kbdev: Kbase device pointer |
| * @offset: Offset of register |
| * |
| * Caller must ensure the GPU is powered (@kbdev->pm.gpu_powered != false). |
| * |
| * Return: Value in desired register |
| */ |
| u32 kbase_reg_read(struct kbase_device *kbdev, u32 offset); |
| |
| /** |
| * kbase_is_gpu_lost() - Has the GPU been lost. |
| * @kbdev: Kbase device pointer |
| * |
| * This function will return true if the GPU has been lost. |
| * When this happens register reads will be zero. A zero GPU_ID is |
| * invalid so this is used to detect GPU_LOST |
| * |
| * Return: True if GPU LOST |
| */ |
| bool kbase_is_gpu_lost(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_gpu_start_cache_clean - Start a cache clean |
| * @kbdev: Kbase device |
| * |
| * Issue a cache clean and invalidate command to hardware. This function will |
| * take hwaccess_lock. |
| */ |
| void kbase_gpu_start_cache_clean(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_gpu_start_cache_clean_nolock - Start a cache clean |
| * @kbdev: Kbase device |
| * |
| * Issue a cache clean and invalidate command to hardware. hwaccess_lock |
| * must be held by the caller. |
| */ |
| void kbase_gpu_start_cache_clean_nolock(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_gpu_wait_cache_clean - Wait for cache cleaning to finish |
| * @kbdev: Kbase device |
| * |
| * This function will take hwaccess_lock, and may sleep. |
| */ |
| void kbase_gpu_wait_cache_clean(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_gpu_wait_cache_clean_timeout - Wait for certain time for cache |
| * cleaning to finish |
| * @kbdev: Kbase device |
| * @wait_timeout_ms: Time, in milli seconds, to wait for cache clean to complete. |
| * |
| * This function will take hwaccess_lock, and may sleep. This is supposed to be |
| * called from paths (like GPU reset) where an indefinite wait for the completion |
| * of cache clean operation can cause deadlock, as the operation may never |
| * complete. |
| * |
| * Return: 0 if successful or a negative error code on failure. |
| */ |
| int kbase_gpu_wait_cache_clean_timeout(struct kbase_device *kbdev, |
| unsigned int wait_timeout_ms); |
| |
| /** |
| * kbase_gpu_cache_clean_wait_complete - Called after the cache cleaning is |
| * finished. Would also be called after |
| * the GPU reset. |
| * @kbdev: Kbase device |
| * |
| * Caller must hold the hwaccess_lock. |
| */ |
| void kbase_gpu_cache_clean_wait_complete(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_gpu_interrupt - GPU interrupt handler |
| * @kbdev: Kbase device pointer |
| * @val: The value of the GPU IRQ status register which triggered the call |
| * |
| * This function is called from the interrupt handler when a GPU irq is to be |
| * handled. |
| */ |
| void kbase_gpu_interrupt(struct kbase_device *kbdev, u32 val); |
| |
| #endif /* _KBASE_DEVICE_INTERNAL_H_ */ |
