diff options
Diffstat (limited to 'drivers/ieee1394/ieee1394_transactions.h')
| -rw-r--r-- | drivers/ieee1394/ieee1394_transactions.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/ieee1394/ieee1394_transactions.h b/drivers/ieee1394/ieee1394_transactions.h new file mode 100644 index 000000000..136d4f7d9 --- /dev/null +++ b/drivers/ieee1394/ieee1394_transactions.h @@ -0,0 +1,69 @@ +#ifndef _IEEE1394_TRANSACTIONS_H +#define _IEEE1394_TRANSACTIONS_H + +#include "ieee1394_core.h" + + +/* + * Utility functions to fill out packet headers. + */ +void fill_async_readquad(struct hpsb_packet *packet, u64 addr); +void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode, + quadlet_t data); +void fill_async_readblock(struct hpsb_packet *packet, u64 addr, int length); +void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode, + int length); +void fill_async_writequad(struct hpsb_packet *packet, u64 addr, quadlet_t data); +void fill_async_writeblock(struct hpsb_packet *packet, u64 addr, int length); +void fill_async_write_resp(struct hpsb_packet *packet, int rcode); +void fill_async_lock(struct hpsb_packet *packet, u64 addr, int extcode, + int length); +void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode, + int length); +void fill_iso_packet(struct hpsb_packet *packet, int length, int channel, + int tag, int sync); + +/* + * Get and free transaction labels. + */ +int get_tlabel(struct hpsb_host *host, nodeid_t nodeid, int wait); +void free_tlabel(struct hpsb_host *host, nodeid_t nodeid, int tlabel); + +struct hpsb_packet *hpsb_make_readqpacket(struct hpsb_host *host, nodeid_t node, + u64 addr); +struct hpsb_packet *hpsb_make_readbpacket(struct hpsb_host *host, nodeid_t node, + u64 addr, size_t length); +struct hpsb_packet *hpsb_make_writeqpacket(struct hpsb_host *host, + nodeid_t node, u64 addr, + quadlet_t data); +struct hpsb_packet *hpsb_make_writebpacket(struct hpsb_host *host, + nodeid_t node, u64 addr, + size_t length); + +/* + * hpsb_packet_success - Make sense of the ack and reply codes and + * return more convenient error codes: + * 0 success + * -EBUSY node is busy, try again + * -EAGAIN error which can probably resolved by retry + * -EREMOTEIO node suffers from an internal error + * -EACCES this transaction is not allowed on requested address + * -EINVAL invalid address at node + */ +int hpsb_packet_success(struct hpsb_packet *packet); + + +/* + * The generic read, write and lock functions. All recognize the local node ID + * and act accordingly. Read and write automatically use quadlet commands if + * length == 4 and and block commands otherwise (however, they do not yet + * support lengths that are not a multiple of 4). + */ +int hpsb_read(struct hpsb_host *host, nodeid_t node, u64 addr, + quadlet_t *buffer, size_t length); +int hpsb_write(struct hpsb_host *host, nodeid_t node, u64 addr, + quadlet_t *buffer, size_t length); +int hpsb_lock(struct hpsb_host *host, nodeid_t node, u64 addr, int extcode, + quadlet_t *data, quadlet_t arg); + +#endif /* _IEEE1394_TRANSACTIONS_H */ |