/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2010-2023 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#ifndef _KBASE_FENCE_H_
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#define _KBASE_FENCE_H_
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/*
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* mali_kbase_fence.[hc] has fence code used only by
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* - CONFIG_SYNC_FILE - explicit fences
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*/
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#if IS_ENABLED(CONFIG_SYNC_FILE)
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#include <linux/list.h>
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#include "mali_kbase_fence_defs.h"
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#include "mali_kbase.h"
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#include "mali_kbase_refcount_defs.h"
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#if MALI_USE_CSF
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/* Maximum number of characters in DMA fence timeline name. */
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#define MAX_TIMELINE_NAME (32)
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/**
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* struct kbase_kcpu_dma_fence_meta - Metadata structure for dma fence objects containing
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* information about KCPU queue. One instance per KCPU
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* queue.
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*
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* @refcount: Atomic value to keep track of number of references to an instance.
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* An instance can outlive the KCPU queue itself.
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* @kbdev: Pointer to Kbase device.
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* @kctx_id: Kbase context ID.
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* @timeline_name: String of timeline name for associated fence object.
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*/
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struct kbase_kcpu_dma_fence_meta {
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kbase_refcount_t refcount;
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struct kbase_device *kbdev;
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int kctx_id;
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char timeline_name[MAX_TIMELINE_NAME];
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};
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/**
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* struct kbase_kcpu_dma_fence - Structure which extends a dma fence object to include a
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* reference to metadata containing more informaiton about it.
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*
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* @base: Fence object itself.
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* @metadata: Pointer to metadata structure.
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*/
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struct kbase_kcpu_dma_fence {
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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struct fence base;
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#else
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struct dma_fence base;
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#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) */
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struct kbase_kcpu_dma_fence_meta *metadata;
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};
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#endif
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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extern const struct fence_ops kbase_fence_ops;
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#else
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extern const struct dma_fence_ops kbase_fence_ops;
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#endif
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/**
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* kbase_fence_out_new() - Creates a new output fence and puts it on the atom
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* @katom: Atom to create an output fence for
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*
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* Return: A new fence object on success, NULL on failure.
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*/
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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struct fence *kbase_fence_out_new(struct kbase_jd_atom *katom);
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#else
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struct dma_fence *kbase_fence_out_new(struct kbase_jd_atom *katom);
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#endif
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#if IS_ENABLED(CONFIG_SYNC_FILE)
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/**
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* kbase_fence_fence_in_set() - Assign input fence to atom
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* @katom: Atom to assign input fence to
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* @fence: Input fence to assign to atom
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*
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* This function will take ownership of one fence reference!
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*/
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#define kbase_fence_fence_in_set(katom, fence) \
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do { \
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WARN_ON((katom)->dma_fence.fence_in); \
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(katom)->dma_fence.fence_in = fence; \
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} while (0)
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#endif
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#if !MALI_USE_CSF
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/**
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* kbase_fence_out_remove() - Removes the output fence from atom
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* @katom: Atom to remove output fence for
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*
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* This will also release the reference to this fence which the atom keeps
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*/
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static inline void kbase_fence_out_remove(struct kbase_jd_atom *katom)
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{
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if (katom->dma_fence.fence) {
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dma_fence_put(katom->dma_fence.fence);
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katom->dma_fence.fence = NULL;
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}
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}
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#if IS_ENABLED(CONFIG_SYNC_FILE)
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/**
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* kbase_fence_in_remove() - Removes the input fence from atom
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* @katom: Atom to remove input fence for
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*
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* This will also release the reference to this fence which the atom keeps
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*/
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static inline void kbase_fence_in_remove(struct kbase_jd_atom *katom)
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{
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if (katom->dma_fence.fence_in) {
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dma_fence_put(katom->dma_fence.fence_in);
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katom->dma_fence.fence_in = NULL;
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}
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}
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#endif
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/**
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* kbase_fence_out_is_ours() - Check if atom has a valid fence created by us
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* @katom: Atom to check output fence for
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*
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* Return: true if fence exists and is valid, otherwise false
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*/
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static inline bool kbase_fence_out_is_ours(struct kbase_jd_atom *katom)
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{
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return katom->dma_fence.fence &&
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katom->dma_fence.fence->ops == &kbase_fence_ops;
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}
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/**
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* kbase_fence_out_signal() - Signal output fence of atom
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* @katom: Atom to signal output fence for
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* @status: Status to signal with (0 for success, < 0 for error)
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*
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* Return: 0 on success, < 0 on error
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*/
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static inline int kbase_fence_out_signal(struct kbase_jd_atom *katom,
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int status)
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{
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if (status) {
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE && \
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KERNEL_VERSION(4, 9, 68) <= LINUX_VERSION_CODE)
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fence_set_error(katom->dma_fence.fence, status);
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#elif (KERNEL_VERSION(4, 11, 0) <= LINUX_VERSION_CODE)
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dma_fence_set_error(katom->dma_fence.fence, status);
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#else
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katom->dma_fence.fence->status = status;
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#endif
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}
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return dma_fence_signal(katom->dma_fence.fence);
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}
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#if IS_ENABLED(CONFIG_SYNC_FILE)
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/**
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* kbase_fence_in_get() - Retrieve input fence for atom.
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* @katom: Atom to get input fence from
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*
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* A ref will be taken for the fence, so use @kbase_fence_put() to release it
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*
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* Return: The fence, or NULL if there is no input fence for atom
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*/
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#define kbase_fence_in_get(katom) dma_fence_get((katom)->dma_fence.fence_in)
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#endif
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/**
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* kbase_fence_out_get() - Retrieve output fence for atom.
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* @katom: Atom to get output fence from
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*
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* A ref will be taken for the fence, so use @kbase_fence_put() to release it
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*
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* Return: The fence, or NULL if there is no output fence for atom
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*/
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#define kbase_fence_out_get(katom) dma_fence_get((katom)->dma_fence.fence)
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#endif /* !MALI_USE_CSF */
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/**
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* kbase_fence_get() - Retrieve fence for a KCPUQ fence command.
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* @fence_info: KCPUQ fence command
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*
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* A ref will be taken for the fence, so use @kbase_fence_put() to release it
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*
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* Return: The fence, or NULL if there is no fence for KCPUQ fence command
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*/
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#define kbase_fence_get(fence_info) dma_fence_get((fence_info)->fence)
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#if MALI_USE_CSF
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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static inline struct kbase_kcpu_dma_fence *kbase_kcpu_dma_fence_get(struct fence *fence)
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#else
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static inline struct kbase_kcpu_dma_fence *kbase_kcpu_dma_fence_get(struct dma_fence *fence)
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#endif
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{
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if (fence->ops == &kbase_fence_ops)
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return (struct kbase_kcpu_dma_fence *)fence;
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return NULL;
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}
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static inline void kbase_kcpu_dma_fence_meta_put(struct kbase_kcpu_dma_fence_meta *metadata)
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{
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if (kbase_refcount_dec_and_test(&metadata->refcount)) {
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atomic_dec(&metadata->kbdev->live_fence_metadata);
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kfree(metadata);
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}
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}
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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static inline void kbase_kcpu_dma_fence_put(struct fence *fence)
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#else
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static inline void kbase_kcpu_dma_fence_put(struct dma_fence *fence)
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#endif
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{
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struct kbase_kcpu_dma_fence *kcpu_fence = kbase_kcpu_dma_fence_get(fence);
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if (kcpu_fence)
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kbase_kcpu_dma_fence_meta_put(kcpu_fence->metadata);
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}
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#endif /* MALI_USE_CSF */
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/**
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* kbase_fence_put() - Releases a reference to a fence
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* @fence: Fence to release reference for.
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*/
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#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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static inline void kbase_fence_put(struct fence *fence)
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#else
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static inline void kbase_fence_put(struct dma_fence *fence)
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#endif
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{
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dma_fence_put(fence);
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}
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#endif /* IS_ENABLED(CONFIG_SYNC_FILE) */
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#endif /* _KBASE_FENCE_H_ */
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