cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cx18-queue.h (2384B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 *  cx18 buffer queues
      4 *
      5 *  Derived from ivtv-queue.h
      6 *
      7 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
      8 *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
      9 */
     10
     11#define CX18_DMA_UNMAPPED	((u32) -1)
     12
     13/* cx18_buffer utility functions */
     14
     15static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
     16	struct cx18_buffer *buf)
     17{
     18	dma_sync_single_for_cpu(&s->cx->pci_dev->dev, buf->dma_handle,
     19				s->buf_size, s->dma);
     20}
     21
     22static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
     23	struct cx18_buffer *buf)
     24{
     25	dma_sync_single_for_device(&s->cx->pci_dev->dev, buf->dma_handle,
     26				   s->buf_size, s->dma);
     27}
     28
     29void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl);
     30
     31static inline void cx18_mdl_sync_for_device(struct cx18_stream *s,
     32					    struct cx18_mdl *mdl)
     33{
     34	if (list_is_singular(&mdl->buf_list))
     35		cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list,
     36							     struct cx18_buffer,
     37							     list));
     38	else
     39		_cx18_mdl_sync_for_device(s, mdl);
     40}
     41
     42void cx18_buf_swap(struct cx18_buffer *buf);
     43void _cx18_mdl_swap(struct cx18_mdl *mdl);
     44
     45static inline void cx18_mdl_swap(struct cx18_mdl *mdl)
     46{
     47	if (list_is_singular(&mdl->buf_list))
     48		cx18_buf_swap(list_first_entry(&mdl->buf_list,
     49					       struct cx18_buffer, list));
     50	else
     51		_cx18_mdl_swap(mdl);
     52}
     53
     54/* cx18_queue utility functions */
     55struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
     56				 struct cx18_queue *q, int to_front);
     57
     58static inline
     59struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
     60				struct cx18_queue *q)
     61{
     62	return _cx18_enqueue(s, mdl, q, 0); /* FIFO */
     63}
     64
     65static inline
     66struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl,
     67			     struct cx18_queue *q)
     68{
     69	return _cx18_enqueue(s, mdl, q, 1); /* LIFO */
     70}
     71
     72void cx18_queue_init(struct cx18_queue *q);
     73struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
     74struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id,
     75	u32 bytesused);
     76void cx18_flush_queues(struct cx18_stream *s);
     77
     78/* queue MDL reconfiguration helpers */
     79void cx18_unload_queues(struct cx18_stream *s);
     80void cx18_load_queues(struct cx18_stream *s);
     81
     82/* cx18_stream utility functions */
     83int cx18_stream_alloc(struct cx18_stream *s);
     84void cx18_stream_free(struct cx18_stream *s);