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authorChristian Pointner <equinox@helsinki.at>2024-05-10 18:52:23 (GMT)
committerChristian Pointner <equinox@helsinki.at>2024-05-10 18:52:23 (GMT)
commita641800acf13b5fb1463d4280c3ee7fc267143fb (patch)
tree248b647a682f71d9eb90d14d24081368ea905a42 /snd-alpx/include/5.3/virt-dma.h
parentcc4badffe0e02d159c21eb90ea080a6a2f90cb4b (diff)
import whole driver package
Diffstat (limited to 'snd-alpx/include/5.3/virt-dma.h')
-rw-r--r--snd-alpx/include/5.3/virt-dma.h222
1 files changed, 0 insertions, 222 deletions
diff --git a/snd-alpx/include/5.3/virt-dma.h b/snd-alpx/include/5.3/virt-dma.h
deleted file mode 100644
index ab158ba..0000000
--- a/snd-alpx/include/5.3/virt-dma.h
+++ /dev/null
@@ -1,222 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Virtual DMA channel support for DMAengine
- *
- * Copyright (C) 2012 Russell King
- */
-#ifndef VIRT_DMA_H
-#define VIRT_DMA_H
-
-#include <linux/dmaengine.h>
-#include <linux/interrupt.h>
-
-#include "dmaengine.h"
-
-struct virt_dma_desc {
- struct dma_async_tx_descriptor tx;
- struct dmaengine_result tx_result;
- /* protected by vc.lock */
- struct list_head node;
-};
-
-struct virt_dma_chan {
- struct dma_chan chan;
- struct tasklet_struct task;
- void (*desc_free)(struct virt_dma_desc *);
-
- spinlock_t lock;
-
- /* protected by vc.lock */
- struct list_head desc_allocated;
- struct list_head desc_submitted;
- struct list_head desc_issued;
- struct list_head desc_completed;
-
- struct virt_dma_desc *cyclic;
- struct virt_dma_desc *vd_terminated;
-};
-
-static inline struct virt_dma_chan *to_virt_chan(struct dma_chan *chan)
-{
- return container_of(chan, struct virt_dma_chan, chan);
-}
-
-void vchan_dma_desc_free_list(struct virt_dma_chan *vc, struct list_head *head);
-void vchan_init(struct virt_dma_chan *vc, struct dma_device *dmadev);
-struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *, dma_cookie_t);
-extern dma_cookie_t vchan_tx_submit(struct dma_async_tx_descriptor *);
-extern int vchan_tx_desc_free(struct dma_async_tx_descriptor *);
-
-/**
- * vchan_tx_prep - prepare a descriptor
- * @vc: virtual channel allocating this descriptor
- * @vd: virtual descriptor to prepare
- * @tx_flags: flags argument passed in to prepare function
- */
-static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan *vc,
- struct virt_dma_desc *vd, unsigned long tx_flags)
-{
- unsigned long flags;
-
- dma_async_tx_descriptor_init(&vd->tx, &vc->chan);
- vd->tx.flags = tx_flags;
- vd->tx.tx_submit = vchan_tx_submit;
- vd->tx.desc_free = vchan_tx_desc_free;
-
- vd->tx_result.result = DMA_TRANS_NOERROR;
- vd->tx_result.residue = 0;
-
- spin_lock_irqsave(&vc->lock, flags);
- list_add_tail(&vd->node, &vc->desc_allocated);
- spin_unlock_irqrestore(&vc->lock, flags);
-
- return &vd->tx;
-}
-
-/**
- * vchan_issue_pending - move submitted descriptors to issued list
- * @vc: virtual channel to update
- *
- * vc.lock must be held by caller
- */
-static inline bool vchan_issue_pending(struct virt_dma_chan *vc)
-{
- list_splice_tail_init(&vc->desc_submitted, &vc->desc_issued);
- return !list_empty(&vc->desc_issued);
-}
-
-/**
- * vchan_cookie_complete - report completion of a descriptor
- * @vd: virtual descriptor to update
- *
- * vc.lock must be held by caller
- */
-static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
-{
- struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
- dma_cookie_t cookie;
-
- cookie = vd->tx.cookie;
- dma_cookie_complete(&vd->tx);
- dev_vdbg(vc->chan.device->dev, "txd %p[%x]: marked complete\n",
- vd, cookie);
- list_add_tail(&vd->node, &vc->desc_completed);
-
- tasklet_schedule(&vc->task);
-}
-
-/**
- * vchan_vdesc_fini - Free or reuse a descriptor
- * @vd: virtual descriptor to free/reuse
- */
-static inline void vchan_vdesc_fini(struct virt_dma_desc *vd)
-{
- struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
-
- if (dmaengine_desc_test_reuse(&vd->tx))
- list_add(&vd->node, &vc->desc_allocated);
- else
- vc->desc_free(vd);
-}
-
-/**
- * vchan_cyclic_callback - report the completion of a period
- * @vd: virtual descriptor
- */
-static inline void vchan_cyclic_callback(struct virt_dma_desc *vd)
-{
- struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
-
- vc->cyclic = vd;
- tasklet_schedule(&vc->task);
-}
-
-/**
- * vchan_terminate_vdesc - Disable pending cyclic callback
- * @vd: virtual descriptor to be terminated
- *
- * vc.lock must be held by caller
- */
-static inline void vchan_terminate_vdesc(struct virt_dma_desc *vd)
-{
- struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
-
- /* free up stuck descriptor */
- if (vc->vd_terminated)
- vchan_vdesc_fini(vc->vd_terminated);
-
- vc->vd_terminated = vd;
- if (vc->cyclic == vd)
- vc->cyclic = NULL;
-}
-
-/**
- * vchan_next_desc - peek at the next descriptor to be processed
- * @vc: virtual channel to obtain descriptor from
- *
- * vc.lock must be held by caller
- */
-static inline struct virt_dma_desc *vchan_next_desc(struct virt_dma_chan *vc)
-{
- return list_first_entry_or_null(&vc->desc_issued,
- struct virt_dma_desc, node);
-}
-
-/**
- * vchan_get_all_descriptors - obtain all submitted and issued descriptors
- * @vc: virtual channel to get descriptors from
- * @head: list of descriptors found
- *
- * vc.lock must be held by caller
- *
- * Removes all submitted and issued descriptors from internal lists, and
- * provides a list of all descriptors found
- */
-static inline void vchan_get_all_descriptors(struct virt_dma_chan *vc,
- struct list_head *head)
-{
- list_splice_tail_init(&vc->desc_allocated, head);
- list_splice_tail_init(&vc->desc_submitted, head);
- list_splice_tail_init(&vc->desc_issued, head);
- list_splice_tail_init(&vc->desc_completed, head);
-}
-
-static inline void vchan_free_chan_resources(struct virt_dma_chan *vc)
-{
- struct virt_dma_desc *vd;
- unsigned long flags;
- LIST_HEAD(head);
-
- spin_lock_irqsave(&vc->lock, flags);
- vchan_get_all_descriptors(vc, &head);
- list_for_each_entry(vd, &head, node)
- dmaengine_desc_clear_reuse(&vd->tx);
- spin_unlock_irqrestore(&vc->lock, flags);
-
- vchan_dma_desc_free_list(vc, &head);
-}
-
-/**
- * vchan_synchronize() - synchronize callback execution to the current context
- * @vc: virtual channel to synchronize
- *
- * Makes sure that all scheduled or active callbacks have finished running. For
- * proper operation the caller has to ensure that no new callbacks are scheduled
- * after the invocation of this function started.
- * Free up the terminated cyclic descriptor to prevent memory leakage.
- */
-static inline void vchan_synchronize(struct virt_dma_chan *vc)
-{
- unsigned long flags;
-
- tasklet_kill(&vc->task);
-
- spin_lock_irqsave(&vc->lock, flags);
- if (vc->vd_terminated) {
- vchan_vdesc_fini(vc->vd_terminated);
- vc->vd_terminated = NULL;
- }
- spin_unlock_irqrestore(&vc->lock, flags);
-}
-
-#endif