summaryrefslogtreecommitdiffstats
path: root/drivers/ieee1394/iso.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ieee1394/iso.h')
-rw-r--r--drivers/ieee1394/iso.h195
1 files changed, 0 insertions, 195 deletions
diff --git a/drivers/ieee1394/iso.h b/drivers/ieee1394/iso.h
deleted file mode 100644
index c2089c0..0000000
--- a/drivers/ieee1394/iso.h
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * IEEE 1394 for Linux
- *
- * kernel ISO transmission/reception
- *
- * Copyright (C) 2002 Maas Digital LLC
- *
- * This code is licensed under the GPL. See the file COPYING in the root
- * directory of the kernel sources for details.
- */
-
-#ifndef IEEE1394_ISO_H
-#define IEEE1394_ISO_H
-
-#include <linux/spinlock_types.h>
-#include <linux/wait.h>
-#include <asm/atomic.h>
-#include <asm/types.h>
-
-#include "dma.h"
-
-struct hpsb_host;
-
-/* high-level ISO interface */
-
-/*
- * This API sends and receives isochronous packets on a large,
- * virtually-contiguous kernel memory buffer. The buffer may be mapped
- * into a user-space process for zero-copy transmission and reception.
- *
- * There are no explicit boundaries between packets in the buffer. A
- * packet may be transmitted or received at any location. However,
- * low-level drivers may impose certain restrictions on alignment or
- * size of packets. (e.g. in OHCI no packet may cross a page boundary,
- * and packets should be quadlet-aligned)
- */
-
-/* Packet descriptor - the API maintains a ring buffer of these packet
- * descriptors in kernel memory (hpsb_iso.infos[]). */
-struct hpsb_iso_packet_info {
- /* offset of data payload relative to the first byte of the buffer */
- __u32 offset;
-
- /* length of the data payload, in bytes (not including the isochronous
- * header) */
- __u16 len;
-
- /* (recv only) the cycle number (mod 8000) on which the packet was
- * received */
- __u16 cycle;
-
- /* (recv only) channel on which the packet was received */
- __u8 channel;
-
- /* 2-bit 'tag' and 4-bit 'sy' fields of the isochronous header */
- __u8 tag;
- __u8 sy;
-
- /* length in bytes of the packet including header/trailer.
- * MUST be at structure end, since the first part of this structure is
- * also defined in raw1394.h (i.e. struct raw1394_iso_packet_info), is
- * copied to userspace and is accessed there through libraw1394. */
- __u16 total_len;
-};
-
-enum hpsb_iso_type { HPSB_ISO_RECV = 0, HPSB_ISO_XMIT = 1 };
-
-/* The mode of the dma when receiving iso data. Must be supported by chip */
-enum raw1394_iso_dma_recv_mode {
- HPSB_ISO_DMA_DEFAULT = -1,
- HPSB_ISO_DMA_OLD_ABI = 0,
- HPSB_ISO_DMA_BUFFERFILL = 1,
- HPSB_ISO_DMA_PACKET_PER_BUFFER = 2
-};
-
-struct hpsb_iso {
- enum hpsb_iso_type type;
-
- /* pointer to low-level driver and its private data */
- struct hpsb_host *host;
- void *hostdata;
-
- /* a function to be called (from interrupt context) after
- * outgoing packets have been sent, or incoming packets have
- * arrived */
- void (*callback)(struct hpsb_iso*);
-
- /* wait for buffer space */
- wait_queue_head_t waitq;
-
- int speed; /* IEEE1394_SPEED_100, 200, or 400 */
- int channel; /* -1 if multichannel */
- int dma_mode; /* dma receive mode */
-
-
- /* greatest # of packets between interrupts - controls
- * the maximum latency of the buffer */
- int irq_interval;
-
- /* the buffer for packet data payloads */
- struct dma_region data_buf;
-
- /* size of data_buf, in bytes (always a multiple of PAGE_SIZE) */
- unsigned int buf_size;
-
- /* # of packets in the ringbuffer */
- unsigned int buf_packets;
-
- /* protects packet cursors */
- spinlock_t lock;
-
- /* the index of the next packet that will be produced
- or consumed by the user */
- int first_packet;
-
- /* the index of the next packet that will be transmitted
- or received by the 1394 hardware */
- int pkt_dma;
-
- /* how many packets, starting at first_packet:
- * (transmit) are ready to be filled with data
- * (receive) contain received data */
- int n_ready_packets;
-
- /* how many times the buffer has overflowed or underflowed */
- atomic_t overflows;
- /* how many cycles were skipped for a given context */
- atomic_t skips;
-
- /* Current number of bytes lost in discarded packets */
- int bytes_discarded;
-
- /* private flags to track initialization progress */
-#define HPSB_ISO_DRIVER_INIT (1<<0)
-#define HPSB_ISO_DRIVER_STARTED (1<<1)
- unsigned int flags;
-
- /* # of packets left to prebuffer (xmit only) */
- int prebuffer;
-
- /* starting cycle for DMA (xmit only) */
- int start_cycle;
-
- /* cycle at which next packet will be transmitted,
- * -1 if not known */
- int xmit_cycle;
-
- /* ringbuffer of packet descriptors in regular kernel memory
- * XXX Keep this last, since we use over-allocated memory from
- * this entry to fill this field. */
- struct hpsb_iso_packet_info *infos;
-};
-
-/* functions available to high-level drivers (e.g. raw1394) */
-
-struct hpsb_iso* hpsb_iso_xmit_init(struct hpsb_host *host,
- unsigned int data_buf_size,
- unsigned int buf_packets,
- int channel,
- int speed,
- int irq_interval,
- void (*callback)(struct hpsb_iso*));
-struct hpsb_iso* hpsb_iso_recv_init(struct hpsb_host *host,
- unsigned int data_buf_size,
- unsigned int buf_packets,
- int channel,
- int dma_mode,
- int irq_interval,
- void (*callback)(struct hpsb_iso*));
-int hpsb_iso_recv_listen_channel(struct hpsb_iso *iso, unsigned char channel);
-int hpsb_iso_recv_unlisten_channel(struct hpsb_iso *iso, unsigned char channel);
-int hpsb_iso_recv_set_channel_mask(struct hpsb_iso *iso, u64 mask);
-int hpsb_iso_xmit_start(struct hpsb_iso *iso, int start_on_cycle,
- int prebuffer);
-int hpsb_iso_recv_start(struct hpsb_iso *iso, int start_on_cycle,
- int tag_mask, int sync);
-void hpsb_iso_stop(struct hpsb_iso *iso);
-void hpsb_iso_shutdown(struct hpsb_iso *iso);
-int hpsb_iso_xmit_queue_packet(struct hpsb_iso *iso, u32 offset, u16 len,
- u8 tag, u8 sy);
-int hpsb_iso_xmit_sync(struct hpsb_iso *iso);
-int hpsb_iso_recv_release_packets(struct hpsb_iso *recv,
- unsigned int n_packets);
-int hpsb_iso_recv_flush(struct hpsb_iso *iso);
-int hpsb_iso_n_ready(struct hpsb_iso *iso);
-
-/* the following are callbacks available to low-level drivers */
-
-void hpsb_iso_packet_sent(struct hpsb_iso *iso, int cycle, int error);
-void hpsb_iso_packet_received(struct hpsb_iso *iso, u32 offset, u16 len,
- u16 total_len, u16 cycle, u8 channel, u8 tag,
- u8 sy);
-void hpsb_iso_wake(struct hpsb_iso *iso);
-
-#endif /* IEEE1394_ISO_H */
OpenPOWER on IntegriCloud