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Diffstat (limited to 'mali_kbase/mali_kbase_mem_migrate.h')
-rw-r--r-- | mali_kbase/mali_kbase_mem_migrate.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/mali_kbase/mali_kbase_mem_migrate.h b/mali_kbase/mali_kbase_mem_migrate.h new file mode 100644 index 0000000..e9f3fc4 --- /dev/null +++ b/mali_kbase/mali_kbase_mem_migrate.h @@ -0,0 +1,118 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * + * (C) COPYRIGHT 2022-2023 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 license. + * + * 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. + * + */ +#ifndef _KBASE_MEM_MIGRATE_H +#define _KBASE_MEM_MIGRATE_H + +/** + * DOC: Base kernel page migration implementation. + */ + +#define PAGE_STATUS_MASK ((u8)0x3F) +#define PAGE_STATUS_GET(status) (status & PAGE_STATUS_MASK) +#define PAGE_STATUS_SET(status, value) ((status & ~PAGE_STATUS_MASK) | (value & PAGE_STATUS_MASK)) + +#define PAGE_ISOLATE_SHIFT (7) +#define PAGE_ISOLATE_MASK ((u8)1 << PAGE_ISOLATE_SHIFT) +#define PAGE_ISOLATE_SET(status, value) \ + ((status & ~PAGE_ISOLATE_MASK) | (value << PAGE_ISOLATE_SHIFT)) +#define IS_PAGE_ISOLATED(status) ((bool)(status & PAGE_ISOLATE_MASK)) + +#define PAGE_MOVABLE_SHIFT (6) +#define PAGE_MOVABLE_MASK ((u8)1 << PAGE_MOVABLE_SHIFT) +#define PAGE_MOVABLE_CLEAR(status) ((status) & ~PAGE_MOVABLE_MASK) +#define PAGE_MOVABLE_SET(status) (status | PAGE_MOVABLE_MASK) + +#define IS_PAGE_MOVABLE(status) ((bool)(status & PAGE_MOVABLE_MASK)) + +/* Global integer used to determine if module parameter value has been + * provided and if page migration feature is enabled. + */ +#if !IS_ENABLED(CONFIG_PAGE_MIGRATION_SUPPORT) +extern const int kbase_page_migration_enabled; +#else +extern int kbase_page_migration_enabled; +#endif + +/** + * kbase_alloc_page_metadata - Allocate and initialize page metadata + * @kbdev: Pointer to kbase device. + * @p: Page to assign metadata to. + * @dma_addr: DMA address mapped to paged. + * @group_id: Memory group ID associated with the entity that is + * allocating the page metadata. + * + * This will allocate memory for the page's metadata, initialize it and + * assign a reference to the page's private field. Importantly, once + * the metadata is set and ready this function will mark the page as + * movable. + * + * Return: true if successful or false otherwise. + */ +bool kbase_alloc_page_metadata(struct kbase_device *kbdev, struct page *p, dma_addr_t dma_addr, + u8 group_id); + +bool kbase_is_page_migration_enabled(void); + +/** + * kbase_free_page_later - Defer freeing of given page. + * @kbdev: Pointer to kbase device + * @p: Page to free + * + * This will add given page to a list of pages which will be freed at + * a later time. + */ +void kbase_free_page_later(struct kbase_device *kbdev, struct page *p); + +#if (KERNEL_VERSION(6, 0, 0) > LINUX_VERSION_CODE) +/* + * kbase_mem_migrate_set_address_space_ops - Set address space operations + * + * @kbdev: Pointer to object representing an instance of GPU platform device. + * @filp: Pointer to the struct file corresponding to device file + * /dev/malixx instance, passed to the file's open method. + * + * Assign address space operations to the given file struct @filp and + * add a reference to @kbdev. + */ +void kbase_mem_migrate_set_address_space_ops(struct kbase_device *kbdev, struct file *const filp); +#endif + +/* + * kbase_mem_migrate_init - Initialise kbase page migration + * + * @kbdev: Pointer to kbase device + * + * Enables page migration by default based on GPU and setup work queue to + * defer freeing pages during page migration callbacks. + */ +void kbase_mem_migrate_init(struct kbase_device *kbdev); + +/* + * kbase_mem_migrate_term - Terminate kbase page migration + * + * @kbdev: Pointer to kbase device + * + * This will flush any work left to free pages from page migration + * and destroy workqueue associated. + */ +void kbase_mem_migrate_term(struct kbase_device *kbdev); + +#endif /* _KBASE_migrate_H */ |