From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/media/pci/cx18/cx18-queue.h | 84 +++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 drivers/media/pci/cx18/cx18-queue.h (limited to 'drivers/media/pci/cx18/cx18-queue.h') diff --git a/drivers/media/pci/cx18/cx18-queue.h b/drivers/media/pci/cx18/cx18-queue.h new file mode 100644 index 000000000..26f2097c0 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-queue.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * cx18 buffer queues + * + * Derived from ivtv-queue.h + * + * Copyright (C) 2007 Hans Verkuil + * Copyright (C) 2008 Andy Walls + */ + +#define CX18_DMA_UNMAPPED ((u32) -1) + +/* cx18_buffer utility functions */ + +static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s, + struct cx18_buffer *buf) +{ + dma_sync_single_for_cpu(&s->cx->pci_dev->dev, buf->dma_handle, + s->buf_size, s->dma); +} + +static inline void cx18_buf_sync_for_device(struct cx18_stream *s, + struct cx18_buffer *buf) +{ + dma_sync_single_for_device(&s->cx->pci_dev->dev, buf->dma_handle, + s->buf_size, s->dma); +} + +void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl); + +static inline void cx18_mdl_sync_for_device(struct cx18_stream *s, + struct cx18_mdl *mdl) +{ + if (list_is_singular(&mdl->buf_list)) + cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list, + struct cx18_buffer, + list)); + else + _cx18_mdl_sync_for_device(s, mdl); +} + +void cx18_buf_swap(struct cx18_buffer *buf); +void _cx18_mdl_swap(struct cx18_mdl *mdl); + +static inline void cx18_mdl_swap(struct cx18_mdl *mdl) +{ + if (list_is_singular(&mdl->buf_list)) + cx18_buf_swap(list_first_entry(&mdl->buf_list, + struct cx18_buffer, list)); + else + _cx18_mdl_swap(mdl); +} + +/* cx18_queue utility functions */ +struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, + struct cx18_queue *q, int to_front); + +static inline +struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, + struct cx18_queue *q) +{ + return _cx18_enqueue(s, mdl, q, 0); /* FIFO */ +} + +static inline +struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl, + struct cx18_queue *q) +{ + return _cx18_enqueue(s, mdl, q, 1); /* LIFO */ +} + +void cx18_queue_init(struct cx18_queue *q); +struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q); +struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id, + u32 bytesused); +void cx18_flush_queues(struct cx18_stream *s); + +/* queue MDL reconfiguration helpers */ +void cx18_unload_queues(struct cx18_stream *s); +void cx18_load_queues(struct cx18_stream *s); + +/* cx18_stream utility functions */ +int cx18_stream_alloc(struct cx18_stream *s); +void cx18_stream_free(struct cx18_stream *s); -- cgit v1.2.3