linux-next/drivers/ieee1394/hosts.h

#ifndef _IEEE1394_HOSTS_H
#define _IEEE1394_HOSTS_H

#include <linux/device.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/skbuff.h>

#include <asm/semaphore.h>

#include "ieee1394_types.h"
#include "csr.h"


struct hpsb_packet;
struct hpsb_iso;

struct hpsb_host {
        struct list_head host_list;

        void *hostdata;

        atomic_t generation;

	struct sk_buff_head pending_packet_queue;

	struct timer_list timeout;
	unsigned long timeout_interval;

        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;

	/* Per node tlabel pool allocation */
	struct hpsb_tlabel_pool tpool[64];

        struct hpsb_host_driver *driver;

	struct pci_dev *pdev;

	int id;

	struct device device;
	struct class_device class_dev;

	int update_config_rom;
	struct work_struct delayed_reset;

	unsigned int config_roms;

	struct list_head addr_space;
};



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,

        /* 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 isoctl_cmd {
	/* rawiso API - see iso.h for the meanings of these commands
	   (they correspond exactly to the hpsb_iso_* API functions)
	 * INIT = allocate resources
	 * START = begin transmission/reception
	 * STOP = halt transmission/reception
	 * QUEUE/RELEASE = produce/consume packets
	 * SHUTDOWN = deallocate resources
	 */

	XMIT_INIT,
	XMIT_START,
	XMIT_STOP,
	XMIT_QUEUE,
	XMIT_SHUTDOWN,

	RECV_INIT,
	RECV_LISTEN_CHANNEL,   /* multi-channel only */
	RECV_UNLISTEN_CHANNEL, /* multi-channel only */
	RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
	RECV_START,
	RECV_STOP,
	RECV_RELEASE,
	RECV_SHUTDOWN,
	RECV_FLUSH
};

enum reset_types {
        /* 166 microsecond reset -- only type of reset available on
           non-1394a capable controllers */
        LONG_RESET,

        /* Short (arbitrated) reset -- only available on 1394a capable
           controllers */
        SHORT_RESET,

	/* Variants that set force_root before issueing the bus reset */
	LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,

	/* Variants that clear force_root before issueing the bus reset */
	LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
};

struct hpsb_host_driver {
	struct module *owner;
	const char *name;

	/* The hardware driver may optionally support a function that is used
	 * to set the hardware ConfigROM if the hardware supports handling
	 * reads to the ConfigROM on its own. */
	void (*set_hw_config_rom) (struct hpsb_host *host, quadlet_t *config_rom);

        /* 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 on success, negative errno on 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);

	 /* ISO transmission/reception functions. Return 0 on success, -1
	  * (or -EXXX errno code) on failure. If the low-level driver does not
	  * support the new ISO API, set isoctl to NULL.
	  */
	int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long 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);
};


struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
				  struct device *dev);
int hpsb_add_host(struct hpsb_host *host);
void hpsb_remove_host(struct hpsb_host *h);

/* The following 2 functions are deprecated and will be removed when the
 * raw1394/libraw1394 update is complete. */
int hpsb_update_config_rom(struct hpsb_host *host,
      const quadlet_t *new_rom, size_t size, unsigned char rom_version);
int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer,
      size_t buffersize, size_t *rom_size, unsigned char *rom_version);

/* Updates the configuration rom image of a host.  rom_version must be the
 * current version, otherwise it will fail with return value -1. If this
 * host does not support config-rom-update, it will return -EINVAL.
 * Return value 0 indicates success.
 */
int hpsb_update_config_rom_image(struct hpsb_host *host);

#endif /* _IEEE1394_HOSTS_H */