hosts.h
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:6k
- #ifndef _IEEE1394_HOSTS_H
- #define _IEEE1394_HOSTS_H
- #include <linux/wait.h>
- #include <linux/tqueue.h>
- #include <linux/list.h>
- #include <asm/semaphore.h>
- #include "ieee1394_types.h"
- #include "csr.h"
- struct hpsb_packet;
- struct hpsb_host {
- struct list_head host_list;
- void *hostdata;
- atomic_t generation;
- int refcount;
- struct list_head pending_packets;
- spinlock_t pending_pkt_lock;
- struct tq_struct timeout_tq;
- /* A bitmask where a set bit means that this tlabel is in use.
- * FIXME - should be handled per node instead of per bus. */
- u32 tlabel_pool[2];
- struct semaphore tlabel_count;
- spinlock_t tlabel_lock;
- u32 tlabel_current;
- unsigned char iso_listen_count[64];
- int node_count; /* number of identified nodes on this bus */
- int selfid_count; /* total number of SelfIDs received */
- int nodes_active; /* number of nodes that are actually active */
- nodeid_t node_id; /* node ID of this host */
- nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
- nodeid_t busmgr_id; /* ID of this bus' bus manager */
- /* this nodes state */
- unsigned in_bus_reset:1;
- unsigned is_shutdown:1;
- /* this nodes' duties on the bus */
- unsigned is_root:1;
- unsigned is_cycmst:1;
- unsigned is_irm:1;
- unsigned is_busmgr:1;
- int reset_retries;
- quadlet_t *topology_map;
- u8 *speed_map;
- struct csr_control csr;
- struct hpsb_host_driver *driver;
- struct pci_dev *pdev;
- };
- enum devctl_cmd {
- /* Host is requested to reset its bus and cancel all outstanding async
- * requests. If arg == 1, it shall also attempt to become root on the
- * bus. Return void. */
- RESET_BUS,
- /* Arg is void, return value is the hardware cycle counter value. */
- GET_CYCLE_COUNTER,
- /* Set the hardware cycle counter to the value in arg, return void.
- * FIXME - setting is probably not required. */
- SET_CYCLE_COUNTER,
- /* Configure hardware for new bus ID in arg, return void. */
- SET_BUS_ID,
- /* If arg true, start sending cycle start packets, stop if arg == 0.
- * Return void. */
- ACT_CYCLE_MASTER,
- /* Cancel all outstanding async requests without resetting the bus.
- * Return void. */
- CANCEL_REQUESTS,
- /* Decrease host usage count if arg == 0, increase otherwise. Return
- * 1 for success, 0 for failure. Increase usage may fail if the driver
- * is in the process of shutting itself down. Decrease usage can not
- * fail. */
- MODIFY_USAGE,
- /* Start or stop receiving isochronous channel in arg. Return void.
- * This acts as an optimization hint, hosts are not required not to
- * listen on unrequested channels. */
- ISO_LISTEN_CHANNEL,
- ISO_UNLISTEN_CHANNEL
- };
- enum reset_types {
- /* 166 microsecond reset -- only type of reset available on
- non-1394a capable IEEE 1394 controllers */
- LONG_RESET,
- /* Short (arbitrated) reset -- only available on 1394a capable
- IEEE 1394 capable controllers */
- SHORT_RESET
- };
- struct hpsb_host_driver {
- const char *name;
- /* This function must store a pointer to the configuration ROM into the
- * location referenced to by pointer and return the size of the ROM. It
- * may not fail. If any allocation is required, it must be done
- * earlier.
- */
- size_t (*get_rom) (struct hpsb_host *host, const quadlet_t **pointer);
- /* This function shall implement packet transmission based on
- * packet->type. It shall CRC both parts of the packet (unless
- * packet->type == raw) and do byte-swapping as necessary or instruct
- * the hardware to do so. It can return immediately after the packet
- * was queued for sending. After sending, hpsb_sent_packet() has to be
- * called. Return 0 for failure.
- * NOTE: The function must be callable in interrupt context.
- */
- int (*transmit_packet) (struct hpsb_host *host,
- struct hpsb_packet *packet);
- /* This function requests miscellanous services from the driver, see
- * above for command codes and expected actions. Return -1 for unknown
- * command, though that should never happen.
- */
- int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg);
- /* This function is mainly to redirect local CSR reads/locks to the iso
- * management registers (bus manager id, bandwidth available, channels
- * available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
- * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
- * as OHCI uses). data and compare are the new data and expected data
- * respectively, return value is the old value.
- */
- quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
- quadlet_t data, quadlet_t compare);
- };
- /* core internal use */
- void register_builtin_lowlevels(void);
- /* high level internal use */
- struct hpsb_highlevel;
- void hl_all_hosts(void (*function)(struct hpsb_host*));
- /*
- * In order to prevent hosts from unloading, use hpsb_ref_host(). This prevents
- * the host from going away (e.g. makes module unloading of the driver
- * impossible), but still can not guarantee it (e.g. PC-Card being pulled by the
- * user). hpsb_ref_host() returns false if host could not be locked. If it is
- * successful, host is valid as a pointer until hpsb_unref_host() (not just
- * until after remove_host).
- */
- int hpsb_ref_host(struct hpsb_host *host);
- void hpsb_unref_host(struct hpsb_host *host);
- struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra);
- void hpsb_add_host(struct hpsb_host *host);
- void hpsb_remove_host(struct hpsb_host *h);
- #endif /* _IEEE1394_HOSTS_H */