qla_rscn.c

linux-2.6.15.6

	mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	fc_port_t *remote_fcport;

	remote_fcport = iodesc->remote_fcport;

	/* Ensure the port IDs are consistent. */
	if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
		    "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
		    ha->host_no, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa));

		return (QLA_SUCCESS);
	}

	/* Only process the last command. */
	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
		    "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
		    iodesc->idx));

		return (QLA_SUCCESS);
	}

	if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
		    "[%x/%02x%02x%02x] online.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));

		atomic_set(&remote_fcport->state, FCS_ONLINE);
	} else {
		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
		    "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
		    le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));

		if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
			atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
	}
	remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;

	return (QLA_SUCCESS);
}


/**
 * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build fabric port logout mailbox IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
	    "status=%x mb0=%x mb1=%x.\n", ha->host_no,
	    iodesc->remote_fcport->loop_id,
	    iodesc->remote_fcport->d_id.b.domain,
	    iodesc->remote_fcport->d_id.b.area,
	    iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
	    le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));

	return (QLA_SUCCESS);
}


/**
 * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 * @ha: HA context
 * @iodesc: io descriptor
 * @d_id: port id for device
 * @ha_locked: is function called with the hardware lock
 *
 * Returns QLA_SUCCESS if the IOCB was issued.
 */
static int
qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    port_id_t *d_id, int ha_locked)
{
	unsigned long flags = 0;
	struct mbx_entry *mbxentry;

	/* Send marker if required. */
	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
		return (QLA_FUNCTION_FAILED);

	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Build fabric port login mailbox IOCB. */
	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
	if (mbxentry == NULL) {
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);

		return (QLA_FUNCTION_FAILED);
	}
	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
	mbxentry->mb1 = mbxentry->loop_id.extended =
	    cpu_to_le16(iodesc->remote_fcport->loop_id);
	mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
	mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
	wmb();

	qla2x00_add_iodesc_timer(iodesc);

	/* Issue command to ISP. */
	qla2x00_isp_cmd(ha);

	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

	DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
	    "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
	    iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
	    d_id->b.al_pa));

	return (QLA_SUCCESS);
}

/**
 * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 * @ha: HA context
 * @iodesc: io descriptor
 * @mbxstat: mailbox status IOCB
 *
 * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 * will be used for a retry.
 */
static int
qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
    struct mbx_entry *mbxstat)
{
	int rval;
	fc_port_t *fcport, *remote_fcport, *exist_fcport;
	struct io_descriptor *abort_iodesc, *login_iodesc;
	uint16_t status, mb[8];
	uint16_t reuse;
	uint16_t remote_loopid;
	port_id_t remote_did, inuse_did;

	remote_fcport = iodesc->remote_fcport;

	/* Only process the last command. */
	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
		DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
		    "[%02x%02x%02x], expected %x, received %x.\n",
		    ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
		    iodesc->idx));

		/* Free RSCN fcport resources. */
		if (remote_fcport->port_type == FCT_RSCN) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
			    "fcport %p [%x/%02x%02x%02x] given ignored Login "
			    "IOCB.\n", ha->host_no, remote_fcport,
			    remote_fcport->loop_id,
			    remote_fcport->d_id.b.domain,
			    remote_fcport->d_id.b.area,
			    remote_fcport->d_id.b.al_pa));

			list_del(&remote_fcport->list);
			kfree(remote_fcport);
		}
		return (QLA_SUCCESS);
	}

	status = le16_to_cpu(mbxstat->status);
	mb[0] = le16_to_cpu(mbxstat->mb0);
	mb[1] = le16_to_cpu(mbxstat->mb1);
	mb[2] = le16_to_cpu(mbxstat->mb2);
	mb[6] = le16_to_cpu(mbxstat->mb6);
	mb[7] = le16_to_cpu(mbxstat->mb7);

	/* Good status? */
	if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
	    mb[0] == MBS_COMMAND_COMPLETE) {

		DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
		    "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
		    mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
		    mbxstat->port_name[2], mbxstat->port_name[3],
		    mbxstat->port_name[4], mbxstat->port_name[5],
		    mbxstat->port_name[6], mbxstat->port_name[7]));

		memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
		memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);

		/* Is the device already in our fcports list? */
		if (remote_fcport->port_type != FCT_RSCN) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
			    "[%x/%02x%02x%02x] online.\n", ha->host_no,
			    remote_fcport->loop_id,
			    remote_fcport->d_id.b.domain,
			    remote_fcport->d_id.b.area,
			    remote_fcport->d_id.b.al_pa));

			qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);

			return (QLA_SUCCESS);
		}

		/* Does the RSCN portname already exist in our fcports list? */
		exist_fcport = NULL;
		list_for_each_entry(fcport, &ha->fcports, list) {
			if (memcmp(remote_fcport->port_name, fcport->port_name,
			    WWN_SIZE) == 0) {
				exist_fcport = fcport;
				break;
			}
		}
		if (exist_fcport != NULL) {
			DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
			    "fcport in fcports list [%p].\n", ha->host_no,
			    exist_fcport));

			/* Abort any ADISC that could have been sent. */
			if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
			    exist_fcport->iodesc_idx_sent <
			    MAX_IO_DESCRIPTORS &&
			    ha->io_descriptors[exist_fcport->iodesc_idx_sent].
			    cb_idx == ADISC_PORT_IOCB_CB) {

				abort_iodesc = qla2x00_alloc_iodesc(ha);
				if (abort_iodesc) {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- issuing abort to outstanding "
					    "Adisc [%x/%02x%02x%02x].\n",
					    ha->host_no, remote_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					abort_iodesc->cb_idx = ABORT_IOCB_CB;
					abort_iodesc->d_id.b24 =
					    exist_fcport->d_id.b24;
					abort_iodesc->remote_fcport =
					    exist_fcport;
					exist_fcport->iodesc_idx_sent =
					    abort_iodesc->idx;
					qla2x00_send_abort_iocb(ha,
					    abort_iodesc, ha->io_descriptors[
					     exist_fcport->iodesc_idx_sent].
					      signature, 1);
				} else {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- unable to abort outstanding "
					    "Adisc [%x/%02x%02x%02x].\n",
					    ha->host_no, remote_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));
				}
			}

			/*
			 * If the existing fcport is waiting to send an ADISC
			 * or LOGIN, then reuse remote fcport (RSCN) to
			 * continue waiting.
			 */
			reuse = 0;
			remote_loopid = remote_fcport->loop_id;
			remote_did.b24 = remote_fcport->d_id.b24;
			if (exist_fcport->iodesc_idx_sent ==
			    IODESC_ADISC_NEEDED ||
			    exist_fcport->iodesc_idx_sent ==
			    IODESC_LOGIN_NEEDED) {
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "existing fcport [%x/%02x%02x%02x] "
				    "waiting for IO descriptor, reuse RSCN "
				    "fcport.\n", ha->host_no,
				    exist_fcport->loop_id,
				    exist_fcport->d_id.b.domain,
				    exist_fcport->d_id.b.area,
				    exist_fcport->d_id.b.al_pa));

				reuse++;
				remote_fcport->iodesc_idx_sent =
				    exist_fcport->iodesc_idx_sent;
				exist_fcport->iodesc_idx_sent =
				    IODESC_INVALID_INDEX;
				remote_fcport->loop_id = exist_fcport->loop_id;
				remote_fcport->d_id.b24 =
				    exist_fcport->d_id.b24;
			}

			/* Logout the old loopid. */
			if (!reuse &&
			    exist_fcport->loop_id != remote_fcport->loop_id &&
			    exist_fcport->loop_id != FC_NO_LOOP_ID) {
				login_iodesc = qla2x00_alloc_iodesc(ha);
				if (login_iodesc) {
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- issuing logout to free old "
					    "loop id [%x/%02x%02x%02x].\n",
					    ha->host_no, exist_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					login_iodesc->cb_idx =
					    LOGOUT_PORT_IOCB_CB;
					login_iodesc->d_id.b24 =
					    exist_fcport->d_id.b24;
					login_iodesc->remote_fcport =
					    exist_fcport;
					exist_fcport->iodesc_idx_sent =
					    login_iodesc->idx;
					qla2x00_send_logout_iocb(ha,
					    login_iodesc, 1);
				} else {
					/* Ran out of IO descriptiors. */
					DEBUG14(printk("scsi(%ld): Login IOCB "
					    "-- unable to logout to free old "
					    "loop id [%x/%02x%02x%02x].\n",
					    ha->host_no, exist_fcport->loop_id,
					    exist_fcport->d_id.b.domain,
					    exist_fcport->d_id.b.area,
					    exist_fcport->d_id.b.al_pa));

					exist_fcport->iodesc_idx_sent =
					    IODESC_INVALID_INDEX;
				}

			}

			/* Update existing fcport with remote fcport info. */
			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
			    "existing fcport [%x/%02x%02x%02x] online.\n",
			    ha->host_no, remote_loopid, remote_did.b.domain,
			    remote_did.b.area, remote_did.b.al_pa));

			memcpy(exist_fcport->node_name,
			    remote_fcport->node_name, WWN_SIZE);
			exist_fcport->loop_id = remote_loopid;
			exist_fcport->d_id.b24 = remote_did.b24;
			qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);

			/* Finally, free the remote (RSCN) fcport. */
			if (!reuse) {
				DEBUG14(printk("scsi(%ld): Login IOCB -- "
				    "Freeing RSCN fcport %p "
				    "[%x/%02x%02x%02x].\n", ha->host_no,
				    remote_fcport, remote_fcport->loop_id,
				    remote_fcport->d_id.b.domain,
				    remote_fcport->d_id.b.area,
				    remote_fcport->d_id.b.al_pa));

				list_del(&remote_fcport->list);
				kfree(remote_fcport);
			}

			return (QLA_SUCCESS);
		}

		/*
		 * A new device has been added, move the RSCN fcport to our
		 * fcports list.
		 */
		DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
		    "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));

		list_del(&remote_fcport->list);
		remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
		qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
		list_add_tail(&remote_fcport->list, &ha->fcports);
		set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
	} else {
		/* Handle login failure. */
		if (remote_fcport->login_retry != 0) {
			if (mb[0] == MBS_LOOP_ID_USED) {
				inuse_did.b.domain = LSB(mb[1]);
				inuse_did.b.area = MSB(mb[2]);
				inuse_did.b.al_pa = LSB(mb[2]);

				DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
				    "id [%x] used by port id [%02x%02x%02x].\n",
				    ha->host_no, remote_fcport->loop_id,
				    inuse_did.b.domain, inuse_did.b.area,
				    inuse_did.b.al_pa));

				if (remote_fcport->d_id.b24 ==
				    INVALID_PORT_ID) {
					/*
					 * Invalid port id means we are trying