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/ivtv/ivtv-queue.h | 87 +++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 drivers/media/pci/ivtv/ivtv-queue.h (limited to 'drivers/media/pci/ivtv/ivtv-queue.h') diff --git a/drivers/media/pci/ivtv/ivtv-queue.h b/drivers/media/pci/ivtv/ivtv-queue.h new file mode 100644 index 000000000..983e99642 --- /dev/null +++ b/drivers/media/pci/ivtv/ivtv-queue.h @@ -0,0 +1,87 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + buffer queues. + Copyright (C) 2003-2004 Kevin Thayer + Copyright (C) 2004 Chris Kennedy + Copyright (C) 2005-2007 Hans Verkuil + + */ + +#ifndef IVTV_QUEUE_H +#define IVTV_QUEUE_H + +#define IVTV_DMA_UNMAPPED ((u32) -1) +#define SLICED_VBI_PIO 0 + +/* ivtv_buffer utility functions */ + +static inline int ivtv_might_use_pio(struct ivtv_stream *s) +{ + return s->dma == DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI); +} + +static inline int ivtv_use_pio(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + + return s->dma == DMA_NONE || + (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set); +} + +static inline int ivtv_might_use_dma(struct ivtv_stream *s) +{ + return s->dma != DMA_NONE; +} + +static inline int ivtv_use_dma(struct ivtv_stream *s) +{ + return !ivtv_use_pio(s); +} + +static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf) +{ + if (ivtv_use_dma(s)) + dma_sync_single_for_cpu(&s->itv->pdev->dev, buf->dma_handle, + s->buf_size + 256, s->dma); +} + +static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf) +{ + if (ivtv_use_dma(s)) + dma_sync_single_for_device(&s->itv->pdev->dev, + buf->dma_handle, s->buf_size + 256, + s->dma); +} + +int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes); +void ivtv_buf_swap(struct ivtv_buffer *buf); + +/* ivtv_queue utility functions */ +void ivtv_queue_init(struct ivtv_queue *q); +void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q); +struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q); +int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal, + struct ivtv_queue *to, int needed_bytes); +void ivtv_flush_queues(struct ivtv_stream *s); + +/* ivtv_stream utility functions */ +int ivtv_stream_alloc(struct ivtv_stream *s); +void ivtv_stream_free(struct ivtv_stream *s); + +static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s) +{ + if (ivtv_use_dma(s)) + dma_sync_single_for_cpu(&s->itv->pdev->dev, s->sg_handle, + sizeof(struct ivtv_sg_element), + DMA_TO_DEVICE); +} + +static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s) +{ + if (ivtv_use_dma(s)) + dma_sync_single_for_device(&s->itv->pdev->dev, s->sg_handle, + sizeof(struct ivtv_sg_element), + DMA_TO_DEVICE); +} + +#endif -- cgit v1.2.3