highlevel.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 737 行 · 第 1/2 页

	as->host = host;

	write_lock_irqsave(&addr_space_lock, flags);

	list_for_each(entry, &host->addr_space) {
		u64 a1sa, a1ea;
		u64 a2sa, a2ea;

		a1 = list_entry(entry, struct hpsb_address_serve, host_list);
		a2 = list_entry(entry->next, struct hpsb_address_serve, host_list);

		a1sa = a1->start & align_mask;
		a1ea = (a1->end + alignment -1) & align_mask;
		a2sa = a2->start & align_mask;
		a2ea = (a2->end + alignment -1) & align_mask;

		if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) {
			as->start = max(start, a1ea);
			as->end = as->start + size;
			list_add(&as->host_list, entry);
			list_add_tail(&as->hl_list, &hl->addr_list);
			retval = as->start;
			break;
		}
	}

	write_unlock_irqrestore(&addr_space_lock, flags);

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

	return retval;
}

int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
                            struct hpsb_address_ops *ops, u64 start, u64 end)
{
        struct hpsb_address_serve *as;
	struct list_head *lh;
        int retval = 0;
        unsigned long flags;

        if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
                HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
                return 0;
        }

        as = (struct hpsb_address_serve *)
                kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
        if (as == NULL) {
                return 0;
        }

        INIT_LIST_HEAD(&as->host_list);
        INIT_LIST_HEAD(&as->hl_list);
        as->op = ops;
        as->start = start;
        as->end = end;
	as->host = host;

	write_lock_irqsave(&addr_space_lock, flags);

	list_for_each(lh, &host->addr_space) {
		struct hpsb_address_serve *as_this =
			list_entry(lh, struct hpsb_address_serve, host_list);
		struct hpsb_address_serve *as_next =
			list_entry(lh->next, struct hpsb_address_serve, host_list);

		if (as_this->end > as->start)
			break;

		if (as_next->start >= as->end) {
			list_add(&as->host_list, lh);
			list_add_tail(&as->hl_list, &hl->addr_list);
			retval = 1;
			break;
		}
	}
	write_unlock_irqrestore(&addr_space_lock, flags);

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

        return retval;
}

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

        write_lock_irqsave(&addr_space_lock, flags);

	list_for_each_safe (lh, next, &hl->addr_list) {
                as = list_entry(lh, struct hpsb_address_serve, hl_list);
                if (as->start == start && as->host == host) {
			__delete_addr(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);
        }
}

static void init_hpsb_highlevel(struct hpsb_host *host)
{
	INIT_LIST_HEAD(&dummy_zero_addr.host_list);
	INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
	INIT_LIST_HEAD(&dummy_max_addr.host_list);
	INIT_LIST_HEAD(&dummy_max_addr.hl_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.host_list, &host->addr_space);
	list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
}

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

	init_hpsb_highlevel(host);

	down_read(&hl_drivers_sem);
        list_for_each_entry(hl, &hl_drivers, hl_list) {
		if (hl->add_host)
			hl->add_host(host);
        }
	up_read(&hl_drivers_sem);
	if (host->update_config_rom) {
		if (hpsb_update_config_rom_image(host) < 0)
			HPSB_ERR("Failed to generate Configuration ROM image for "
				 "host %s-%d", hl->name, host->id);
	}
}

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

	down_read(&hl_drivers_sem);
	list_for_each_entry(hl, &hl_drivers, hl_list)
		__unregister_host(hl, host, 0);
	up_read(&hl_drivers_sem);
}

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

	read_lock(&hl_irqs_lock);
	list_for_each_entry(hl, &hl_irqs, irq_list) {
                if (hl->host_reset)
                        hl->host_reset(host);
        }
	read_unlock(&hl_irqs_lock);
}

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

        read_lock(&hl_irqs_lock);
	list_for_each_entry(hl, &hl_irqs, irq_list) {
                if (hl->iso_receive)
                        hl->iso_receive(host, channel, data, length);
        }
        read_unlock(&hl_irqs_lock);
}

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

        read_lock(&hl_irqs_lock);
	list_for_each_entry(hl, &hl_irqs, irq_list) {
                if (hl->fcp_request)
                        hl->fcp_request(host, nodeid, direction, cts, data,
					length);
        }
        read_unlock(&hl_irqs_lock);
}

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

        read_lock(&addr_space_lock);

	list_for_each_entry(as, &host->addr_space, host_list) {
		if (as->start > addr)
			break;

                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;
                        }

			data += partlength;
                        length -= partlength;
                        addr += partlength;

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

        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;
        unsigned int partlength;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

	list_for_each_entry(as, &host->addr_space, host_list) {
		if (as->start > addr)
			break;

                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;
                        }

			data += partlength;
                        length -= partlength;
                        addr += partlength;

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

        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;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

	list_for_each_entry(as, &host->addr_space, host_list) {
		if (as->start > addr)
			break;

                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;
                }
        }

        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;
        int rcode = RCODE_ADDRESS_ERROR;

        read_lock(&addr_space_lock);

	list_for_each_entry(as, &host->addr_space, host_list) {
		if (as->start > addr)
			break;

                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;
                }
        }

        read_unlock(&addr_space_lock);

        return rcode;
}