highlevel.c

IEE1394 火线接口驱动 for linux

        if (retval == 0) {
                kfree(as);
        }

        return retval;
}

int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, u64 start)
{
        int retval = 0;
        struct hpsb_address_serve *as;
        struct list_head *entry;
        unsigned long flags;

        write_lock_irqsave(&addr_space_lock, flags);

        entry = hl->addr_list.next;

        while (entry != &hl->addr_list) {
                as = list_entry(entry, struct hpsb_address_serve, addr_list);
                entry = entry->next;
                if (as->start == start) {
                        list_del(&as->as_list);
                        list_del(&as->addr_list);
                        kfree(as);
                        retval = 1;
                        break;
                }
        }

        write_unlock_irqrestore(&addr_space_lock, flags);

        return retval;
}

int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
                         unsigned int channel)
{
        if (channel > 63) {
                HPSB_ERR("%s called with invalid channel", __FUNCTION__);
                return -EINVAL;
        }

        if (host->iso_listen_count[channel]++ == 0) {
                return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
        }

	return 0;
}

void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host, 
                           unsigned int channel)
{
        if (channel > 63) {
                HPSB_ERR("%s called with invalid channel", __FUNCTION__);
                return;
        }

        if (--host->iso_listen_count[channel] == 0) {
                host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
        }
}


void highlevel_add_host(struct hpsb_host *host)
{
        struct list_head *entry;
        struct hpsb_highlevel *hl;

        read_lock(&hl_drivers_lock);
        list_for_each(entry, &hl_drivers) {
                hl = list_entry(entry, struct hpsb_highlevel, hl_list);
		if (hl->add_host)
			hl->add_host(host);
        }
        read_unlock(&hl_drivers_lock);
}

void highlevel_remove_host(struct hpsb_host *host)
{
        struct list_head *entry;
        struct hpsb_highlevel *hl;

	read_lock(&hl_drivers_lock);
	list_for_each(entry, &hl_drivers) {
                hl = list_entry(entry, struct hpsb_highlevel, hl_list);

		if (hl->remove_host) {
			hl->remove_host(host);
			hpsb_destroy_hostinfo(hl, host);
		}
        }
	read_unlock(&hl_drivers_lock);
}

void highlevel_host_reset(struct hpsb_host *host)
{
        struct list_head *entry;
        struct hpsb_highlevel *hl;

	read_lock(&hl_drivers_lock);
	list_for_each(entry, &hl_drivers) {
                hl = list_entry(entry, struct hpsb_highlevel, hl_list);

                if (hl->host_reset)
                        hl->host_reset(host);
        }
	read_unlock(&hl_drivers_lock);
}

void highlevel_iso_receive(struct hpsb_host *host, void *data,
			   size_t length)
{
        struct list_head *entry;
        struct hpsb_highlevel *hl;
        int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;

        read_lock(&hl_drivers_lock);
        entry = hl_drivers.next;

        while (entry != &hl_drivers) {
                hl = list_entry(entry, struct hpsb_highlevel, hl_list);
                if (hl->iso_receive) {
                        hl->iso_receive(host, channel, data, length);
                }
                entry = entry->next;
        }
        read_unlock(&hl_drivers_lock);
}

void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
			   void *data, size_t length)
{
        struct list_head *entry;
        struct hpsb_highlevel *hl;
        int cts = ((quadlet_t *)data)[0] >> 4;

        read_lock(&hl_drivers_lock);
        entry = hl_drivers.next;

        while (entry != &hl_drivers) {
                hl = list_entry(entry, struct hpsb_highlevel, hl_list);
                if (hl->fcp_request) {
                        hl->fcp_request(host, nodeid, direction, cts, data,
                                            length);
                }
                entry = entry->next;
        }
        read_unlock(&hl_drivers_lock);
}

int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
                   u64 addr, unsigned int length, u16 flags)
{
        struct hpsb_address_serve *as;
        struct list_head *entry;
        unsigned int partlength;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

        entry = addr_space.next;
        as = list_entry(entry, struct hpsb_address_serve, as_list);

        while (as->start <= addr) {
                if (as->end > addr) {
                        partlength = min(as->end - addr, (u64) length);

                        if (as->op->read) {
                                rcode = as->op->read(host, nodeid, data,
						     addr, partlength, flags);
                        } else {
                                rcode = RCODE_TYPE_ERROR;
                        }

			(u8 *)data += partlength;
                        length -= partlength;
                        addr += partlength;

                        if ((rcode != RCODE_COMPLETE) || !length) {
                                break;
                        }
                }

                entry = entry->next;
                as = list_entry(entry, struct hpsb_address_serve, as_list);
        }

        read_unlock(&addr_space_lock);

        if (length && (rcode == RCODE_COMPLETE)) {
                rcode = RCODE_ADDRESS_ERROR;
        }

        return rcode;
}

int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
		    void *data, u64 addr, unsigned int length, u16 flags)
{
        struct hpsb_address_serve *as;
        struct list_head *entry;
        unsigned int partlength;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

        entry = addr_space.next;
        as = list_entry(entry, struct hpsb_address_serve, as_list);

        while (as->start <= addr) {
                if (as->end > addr) {
                        partlength = min(as->end - addr, (u64) length);

                        if (as->op->write) {
                                rcode = as->op->write(host, nodeid, destid,
						      data, addr, partlength, flags);
                        } else {
                                rcode = RCODE_TYPE_ERROR;
                        }

			(u8 *)data += partlength;
                        length -= partlength;
                        addr += partlength;

                        if ((rcode != RCODE_COMPLETE) || !length) {
                                break;
                        }
                }

                entry = entry->next;
                as = list_entry(entry, struct hpsb_address_serve, as_list);
        }

        read_unlock(&addr_space_lock);

        if (length && (rcode == RCODE_COMPLETE)) {
                rcode = RCODE_ADDRESS_ERROR;
        }

        return rcode;
}


int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
                   u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags)
{
        struct hpsb_address_serve *as;
        struct list_head *entry;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

        entry = addr_space.next;
        as = list_entry(entry, struct hpsb_address_serve, as_list);

        while (as->start <= addr) {
                if (as->end > addr) {
                        if (as->op->lock) {
                                rcode = as->op->lock(host, nodeid, store, addr,
                                                     data, arg, ext_tcode, flags);
                        } else {
                                rcode = RCODE_TYPE_ERROR;
                        }

                        break;
                }

                entry = entry->next;
                as = list_entry(entry, struct hpsb_address_serve, as_list);
        }

        read_unlock(&addr_space_lock);

        return rcode;
}

int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
                     u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags)
{
        struct hpsb_address_serve *as;
        struct list_head *entry;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

        entry = addr_space.next;
        as = list_entry(entry, struct hpsb_address_serve, as_list);

        while (as->start <= addr) {
                if (as->end > addr) {
                        if (as->op->lock64) {
                                rcode = as->op->lock64(host, nodeid, store,
                                                       addr, data, arg,
                                                       ext_tcode, flags);
                        } else {
                                rcode = RCODE_TYPE_ERROR;
                        }

                        break;
                }

                entry = entry->next;
                as = list_entry(entry, struct hpsb_address_serve, as_list);
        }

        read_unlock(&addr_space_lock);

        return rcode;
}

void init_hpsb_highlevel(void)
{
        INIT_LIST_HEAD(&dummy_zero_addr.as_list);
        INIT_LIST_HEAD(&dummy_zero_addr.addr_list);
        INIT_LIST_HEAD(&dummy_max_addr.as_list);
        INIT_LIST_HEAD(&dummy_max_addr.addr_list);

        dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;

        dummy_zero_addr.start = dummy_zero_addr.end = 0;
        dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;

        list_add_tail(&dummy_zero_addr.as_list, &addr_space);
        list_add_tail(&dummy_max_addr.as_list, &addr_space);
}