| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * |
| * (C) COPYRIGHT 2011-2017, 2019-2021 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_CONTEXT_H_ |
| #define _KBASE_CONTEXT_H_ |
| |
| #include <linux/atomic.h> |
| |
| /** |
| * kbase_context_debugfs_init - Initialize the kctx platform |
| * specific debugfs |
| * |
| * @kctx: kbase context |
| * |
| * This initializes some debugfs interfaces specific to the platform the source |
| * is compiled for. |
| */ |
| void kbase_context_debugfs_init(struct kbase_context *const kctx); |
| |
| /** |
| * kbase_context_debugfs_term - Terminate the kctx platform |
| * specific debugfs |
| * |
| * @kctx: kbase context |
| * |
| * This terminates some debugfs interfaces specific to the platform the source |
| * is compiled for. |
| */ |
| void kbase_context_debugfs_term(struct kbase_context *const kctx); |
| |
| /** |
| * kbase_create_context() - Create a kernel base context. |
| * |
| * @kbdev: Object representing an instance of GPU platform device, |
| * allocated from the probe method of the Mali driver. |
| * @is_compat: Force creation of a 32-bit context |
| * @flags: Flags to set, which shall be any combination of |
| * BASEP_CONTEXT_CREATE_KERNEL_FLAGS. |
| * @api_version: Application program interface version, as encoded in |
| * a single integer by the KBASE_API_VERSION macro. |
| * @filp: Pointer to the struct file corresponding to device file |
| * /dev/malixx instance, passed to the file's open method. |
| * |
| * Up to one context can be created for each client that opens the device file |
| * /dev/malixx. Context creation is deferred until a special ioctl() system call |
| * is made on the device file. Each context has its own GPU address space. |
| * |
| * Return: new kbase context or NULL on failure |
| */ |
| struct kbase_context * |
| kbase_create_context(struct kbase_device *kbdev, bool is_compat, |
| base_context_create_flags const flags, |
| unsigned long api_version, |
| struct file *filp); |
| |
| /** |
| * kbase_destroy_context - Destroy a kernel base context. |
| * @kctx: Context to destroy |
| * |
| * Will release all outstanding regions. |
| */ |
| void kbase_destroy_context(struct kbase_context *kctx); |
| |
| /** |
| * kbase_ctx_flag - Check if @flag is set on @kctx |
| * @kctx: Pointer to kbase context to check |
| * @flag: Flag to check |
| * |
| * Return: true if @flag is set on @kctx, false if not. |
| */ |
| static inline bool kbase_ctx_flag(struct kbase_context *kctx, |
| enum kbase_context_flags flag) |
| { |
| return atomic_read(&kctx->flags) & flag; |
| } |
| |
| /** |
| * kbase_ctx_flag_clear - Clear @flag on @kctx |
| * @kctx: Pointer to kbase context |
| * @flag: Flag to clear |
| * |
| * Clear the @flag on @kctx. This is done atomically, so other flags being |
| * cleared or set at the same time will be safe. |
| * |
| * Some flags have locking requirements, check the documentation for the |
| * respective flags. |
| */ |
| static inline void kbase_ctx_flag_clear(struct kbase_context *kctx, |
| enum kbase_context_flags flag) |
| { |
| atomic_andnot(flag, &kctx->flags); |
| } |
| |
| /** |
| * kbase_ctx_flag_set - Set @flag on @kctx |
| * @kctx: Pointer to kbase context |
| * @flag: Flag to set |
| * |
| * Set the @flag on @kctx. This is done atomically, so other flags being |
| * cleared or set at the same time will be safe. |
| * |
| * Some flags have locking requirements, check the documentation for the |
| * respective flags. |
| */ |
| static inline void kbase_ctx_flag_set(struct kbase_context *kctx, |
| enum kbase_context_flags flag) |
| { |
| atomic_or(flag, &kctx->flags); |
| } |
| #endif /* _KBASE_CONTEXT_H_ */ |