2007-09-07 07:15:31 +00:00
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/*
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2008-06-10 16:20:58 +00:00
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* zfcp device driver
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2005-04-16 22:20:36 +00:00
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*
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2008-06-10 16:20:58 +00:00
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* Interface to Linux SCSI midlayer.
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2007-09-07 07:15:31 +00:00
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*
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2010-02-17 10:18:56 +00:00
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* Copyright IBM Corporation 2002, 2010
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2005-04-16 22:20:36 +00:00
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*/
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2008-12-25 12:39:53 +00:00
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#define KMSG_COMPONENT "zfcp"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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2009-11-24 15:54:08 +00:00
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#include <linux/types.h>
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#include <scsi/fc/fc_fcp.h>
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2007-05-08 09:16:52 +00:00
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#include <asm/atomic.h>
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2009-08-18 13:43:08 +00:00
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#include "zfcp_ext.h"
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#include "zfcp_dbf.h"
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2009-11-24 15:54:13 +00:00
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#include "zfcp_fc.h"
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2010-02-17 10:18:50 +00:00
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#include "zfcp_reqlist.h"
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2005-04-16 22:20:36 +00:00
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2009-05-15 11:18:16 +00:00
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static unsigned int default_depth = 32;
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module_param_named(queue_depth, default_depth, uint, 0600);
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MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
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2009-10-16 00:46:39 +00:00
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static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
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int reason)
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2009-05-15 11:18:16 +00:00
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{
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2009-10-16 00:47:11 +00:00
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switch (reason) {
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case SCSI_QDEPTH_DEFAULT:
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scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
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break;
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case SCSI_QDEPTH_QFULL:
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scsi_track_queue_full(sdev, depth);
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break;
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case SCSI_QDEPTH_RAMP_UP:
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scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
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break;
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default:
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2009-10-16 00:46:39 +00:00
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return -EOPNOTSUPP;
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2009-10-16 00:47:11 +00:00
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}
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2009-05-15 11:18:16 +00:00
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return sdev->queue_depth;
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}
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2006-08-02 09:05:52 +00:00
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static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
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2005-04-16 22:20:36 +00:00
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{
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struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
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2008-11-04 15:35:05 +00:00
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unit->device = NULL;
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2010-02-17 10:18:56 +00:00
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put_device(&unit->dev);
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2005-04-16 22:20:36 +00:00
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}
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2008-07-02 08:56:36 +00:00
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static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
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2005-04-16 22:20:36 +00:00
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{
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if (sdp->tagged_supported)
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2009-05-15 11:18:16 +00:00
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scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
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2005-04-16 22:20:36 +00:00
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else
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scsi_adjust_queue_depth(sdp, 0, 1);
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return 0;
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}
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2008-07-02 08:56:36 +00:00
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static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
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2005-04-16 22:20:36 +00:00
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{
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2009-08-18 13:43:21 +00:00
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struct zfcp_adapter *adapter =
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(struct zfcp_adapter *) scpnt->device->host->hostdata[0];
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2010-02-17 10:18:53 +00:00
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2008-07-02 08:56:35 +00:00
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set_host_byte(scpnt, result);
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2010-02-17 10:18:57 +00:00
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zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
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2005-04-16 22:20:36 +00:00
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scpnt->scsi_done(scpnt);
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}
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2008-07-02 08:56:36 +00:00
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static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
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void (*done) (struct scsi_cmnd *))
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2005-04-16 22:20:36 +00:00
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{
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struct zfcp_unit *unit;
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struct zfcp_adapter *adapter;
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2009-03-02 12:09:08 +00:00
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int status, scsi_result, ret;
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struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
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2005-04-16 22:20:36 +00:00
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/* reset the status for this request */
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scpnt->result = 0;
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scpnt->host_scribble = NULL;
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scpnt->scsi_done = done;
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/*
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* figure out adapter and target device
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* (stored there by zfcp_scsi_slave_alloc)
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*/
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adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
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2008-07-02 08:56:36 +00:00
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unit = scpnt->device->hostdata;
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2009-03-02 12:09:08 +00:00
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scsi_result = fc_remote_port_chkready(rport);
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if (unlikely(scsi_result)) {
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scpnt->result = scsi_result;
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2010-02-17 10:18:57 +00:00
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zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
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2009-03-02 12:09:08 +00:00
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scpnt->scsi_done(scpnt);
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return 0;
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}
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2008-07-02 08:56:36 +00:00
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status = atomic_read(&unit->status);
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2009-11-24 15:54:07 +00:00
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if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
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!(atomic_read(&unit->port->status) &
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ZFCP_STATUS_COMMON_ERP_FAILED)) {
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/* only unit access denied, but port is good
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* not covered by FC transport, have to fail here */
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2008-07-02 08:56:36 +00:00
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zfcp_scsi_command_fail(scpnt, DID_ERROR);
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2009-08-18 18:18:35 +00:00
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return 0;
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2008-07-02 08:56:36 +00:00
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}
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2009-11-24 15:54:07 +00:00
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if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
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/* This could be either
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* open unit pending: this is temporary, will result in
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* open unit or ERP_FAILED, so retry command
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* call to rport_delete pending: mimic retry from
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* fc_remote_port_chkready until rport is BLOCKED
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*/
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zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
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return 0;
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}
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2009-03-02 12:09:00 +00:00
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ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
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2008-07-02 08:56:36 +00:00
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if (unlikely(ret == -EBUSY))
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2008-11-27 10:44:07 +00:00
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return SCSI_MLQUEUE_DEVICE_BUSY;
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2008-07-02 08:56:36 +00:00
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else if (unlikely(ret < 0))
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return SCSI_MLQUEUE_HOST_BUSY;
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2005-04-16 22:20:36 +00:00
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2008-07-02 08:56:36 +00:00
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return ret;
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2005-04-16 22:20:36 +00:00
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}
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2008-07-02 08:56:36 +00:00
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static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
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2009-11-24 15:53:58 +00:00
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unsigned int id, u64 lun)
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2005-04-16 22:20:36 +00:00
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{
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2009-11-24 15:53:58 +00:00
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unsigned long flags;
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2005-04-16 22:20:36 +00:00
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struct zfcp_port *port;
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2009-11-24 15:53:58 +00:00
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struct zfcp_unit *unit = NULL;
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2005-04-16 22:20:36 +00:00
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2009-11-24 15:53:58 +00:00
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read_lock_irqsave(&adapter->port_list_lock, flags);
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list_for_each_entry(port, &adapter->port_list, list) {
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2005-08-27 18:07:54 +00:00
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if (!port->rport || (id != port->rport->scsi_target_id))
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2005-04-16 22:20:36 +00:00
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continue;
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2009-11-24 15:53:58 +00:00
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unit = zfcp_get_unit_by_lun(port, lun);
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if (unit)
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break;
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2005-04-16 22:20:36 +00:00
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}
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2009-11-24 15:53:58 +00:00
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read_unlock_irqrestore(&adapter->port_list_lock, flags);
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2008-07-02 08:56:36 +00:00
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2009-11-24 15:53:58 +00:00
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return unit;
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2008-07-02 08:56:36 +00:00
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}
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static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
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{
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struct zfcp_adapter *adapter;
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struct zfcp_unit *unit;
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2009-11-24 15:53:58 +00:00
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u64 lun;
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2008-07-02 08:56:36 +00:00
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adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
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if (!adapter)
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goto out;
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2009-11-24 15:53:58 +00:00
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int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun);
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unit = zfcp_unit_lookup(adapter, sdp->id, lun);
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2009-03-02 12:08:55 +00:00
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if (unit) {
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2008-07-02 08:56:36 +00:00
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sdp->hostdata = unit;
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unit->device = sdp;
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2009-11-24 15:53:58 +00:00
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return 0;
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2008-07-02 08:56:36 +00:00
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}
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out:
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2009-11-24 15:53:58 +00:00
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return -ENXIO;
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2005-04-16 22:20:36 +00:00
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}
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2007-02-05 20:16:47 +00:00
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static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
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2005-04-16 22:20:36 +00:00
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{
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2009-03-02 12:09:00 +00:00
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struct Scsi_Host *scsi_host = scpnt->device->host;
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struct zfcp_adapter *adapter =
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(struct zfcp_adapter *) scsi_host->hostdata[0];
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struct zfcp_unit *unit = scpnt->device->hostdata;
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struct zfcp_fsf_req *old_req, *abrt_req;
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2005-04-16 22:20:36 +00:00
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unsigned long flags;
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2009-07-13 13:06:14 +00:00
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unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
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2006-09-18 20:29:20 +00:00
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int retval = SUCCESS;
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2009-03-02 12:09:00 +00:00
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int retry = 3;
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2009-07-13 13:06:14 +00:00
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char *dbf_tag;
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2005-04-16 22:20:36 +00:00
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2005-09-13 19:47:52 +00:00
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/* avoid race condition between late normal completion and abort */
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2005-04-16 22:20:36 +00:00
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write_lock_irqsave(&adapter->abort_lock, flags);
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2010-02-17 10:18:50 +00:00
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old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
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2009-03-02 12:09:00 +00:00
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if (!old_req) {
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2005-04-16 22:20:36 +00:00
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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2009-08-18 13:43:21 +00:00
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zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
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old_reqid);
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2009-04-17 13:08:11 +00:00
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return FAILED; /* completion could be in progress */
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2005-04-16 22:20:36 +00:00
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}
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2009-03-02 12:09:00 +00:00
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old_req->data = NULL;
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2005-04-16 22:20:36 +00:00
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2006-09-18 20:29:20 +00:00
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/* don't access old fsf_req after releasing the abort_lock */
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2005-04-16 22:20:36 +00:00
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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2006-09-18 20:29:20 +00:00
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2009-03-02 12:09:00 +00:00
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while (retry--) {
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2009-07-13 13:06:14 +00:00
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abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
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2009-03-02 12:09:00 +00:00
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if (abrt_req)
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break;
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zfcp_erp_wait(adapter);
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2009-11-24 15:54:16 +00:00
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fc_block_scsi_eh(scpnt);
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2009-03-02 12:09:00 +00:00
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_COMMON_RUNNING)) {
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2009-08-18 13:43:21 +00:00
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zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
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old_reqid);
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2009-03-02 12:09:00 +00:00
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return SUCCESS;
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}
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2005-04-16 22:20:36 +00:00
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}
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2009-03-02 12:09:00 +00:00
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if (!abrt_req)
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return FAILED;
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2005-04-16 22:20:36 +00:00
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2009-08-18 13:43:14 +00:00
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wait_for_completion(&abrt_req->completion);
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2005-09-13 19:47:52 +00:00
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2009-03-02 12:09:00 +00:00
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if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
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2009-07-13 13:06:14 +00:00
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dbf_tag = "okay";
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2009-03-02 12:09:00 +00:00
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else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
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2009-07-13 13:06:14 +00:00
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dbf_tag = "lte2";
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2009-03-02 12:09:00 +00:00
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else {
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2009-07-13 13:06:14 +00:00
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dbf_tag = "fail";
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2005-04-16 22:20:36 +00:00
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retval = FAILED;
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}
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2009-08-18 13:43:21 +00:00
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zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
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2009-03-02 12:09:00 +00:00
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zfcp_fsf_req_free(abrt_req);
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2008-07-02 08:56:36 +00:00
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return retval;
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2005-04-16 22:20:36 +00:00
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}
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2009-03-02 12:09:00 +00:00
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static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
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2005-04-16 22:20:36 +00:00
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{
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2009-03-02 12:09:00 +00:00
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struct zfcp_unit *unit = scpnt->device->hostdata;
|
2005-04-16 22:20:36 +00:00
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struct zfcp_adapter *adapter = unit->port->adapter;
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2009-08-18 13:43:19 +00:00
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struct zfcp_fsf_req *fsf_req = NULL;
|
2008-07-02 08:56:36 +00:00
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int retval = SUCCESS;
|
2009-03-02 12:09:00 +00:00
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int retry = 3;
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while (retry--) {
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fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
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if (fsf_req)
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break;
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zfcp_erp_wait(adapter);
|
2009-11-24 15:54:16 +00:00
|
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fc_block_scsi_eh(scpnt);
|
2009-03-02 12:09:00 +00:00
|
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_COMMON_RUNNING)) {
|
2009-08-18 13:43:21 +00:00
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zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
|
2009-03-02 12:09:00 +00:00
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return SUCCESS;
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}
|
2005-04-16 22:20:36 +00:00
|
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}
|
2009-03-02 12:09:00 +00:00
|
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if (!fsf_req)
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return FAILED;
|
2005-04-16 22:20:36 +00:00
|
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|
2009-08-18 13:43:14 +00:00
|
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wait_for_completion(&fsf_req->completion);
|
2005-09-13 19:48:33 +00:00
|
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|
2005-09-13 19:50:38 +00:00
|
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if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
|
2009-08-18 13:43:21 +00:00
|
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|
zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
|
2008-07-02 08:56:36 +00:00
|
|
|
retval = FAILED;
|
2005-09-13 19:50:38 +00:00
|
|
|
} else
|
2009-08-18 13:43:21 +00:00
|
|
|
zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
|
2005-09-13 19:48:33 +00:00
|
|
|
|
|
|
|
zfcp_fsf_req_free(fsf_req);
|
2005-04-16 22:20:36 +00:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
2009-11-24 15:54:08 +00:00
|
|
|
return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
|
2008-07-02 08:56:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
2009-11-24 15:54:08 +00:00
|
|
|
return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
|
2008-07-02 08:56:36 +00:00
|
|
|
}
|
|
|
|
|
2007-02-05 20:16:47 +00:00
|
|
|
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-03-02 12:09:00 +00:00
|
|
|
struct zfcp_unit *unit = scpnt->device->hostdata;
|
|
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-03-02 12:09:04 +00:00
|
|
|
zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
|
2006-09-18 20:30:36 +00:00
|
|
|
zfcp_erp_wait(adapter);
|
2009-11-24 15:54:16 +00:00
|
|
|
fc_block_scsi_eh(scpnt);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-09-13 19:49:52 +00:00
|
|
|
return SUCCESS;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-07-02 08:56:36 +00:00
|
|
|
struct ccw_dev_id dev_id;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-05-09 09:01:24 +00:00
|
|
|
if (adapter->scsi_host)
|
2008-07-02 08:56:36 +00:00
|
|
|
return 0;
|
2007-05-09 09:01:24 +00:00
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
ccw_device_get_id(adapter->ccw_device, &dev_id);
|
2005-04-16 22:20:36 +00:00
|
|
|
/* register adapter as SCSI host with mid layer of SCSI stack */
|
|
|
|
adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
|
|
|
|
sizeof (struct zfcp_adapter *));
|
|
|
|
if (!adapter->scsi_host) {
|
2008-06-10 16:20:58 +00:00
|
|
|
dev_err(&adapter->ccw_device->dev,
|
2008-10-01 10:42:15 +00:00
|
|
|
"Registering the FCP device with the "
|
|
|
|
"SCSI stack failed\n");
|
2008-07-02 08:56:36 +00:00
|
|
|
return -EIO;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* tell the SCSI stack some characteristics of this adapter */
|
|
|
|
adapter->scsi_host->max_id = 1;
|
|
|
|
adapter->scsi_host->max_lun = 1;
|
|
|
|
adapter->scsi_host->max_channel = 0;
|
2008-07-02 08:56:36 +00:00
|
|
|
adapter->scsi_host->unique_id = dev_id.devno;
|
2009-11-24 15:54:08 +00:00
|
|
|
adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
|
2006-09-18 20:28:49 +00:00
|
|
|
adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
|
|
|
|
|
|
|
|
if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
|
|
|
|
scsi_host_put(adapter->scsi_host);
|
2008-07-02 08:56:36 +00:00
|
|
|
return -EIO;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2008-07-02 08:56:36 +00:00
|
|
|
|
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct Scsi_Host *shost;
|
2005-09-19 14:56:17 +00:00
|
|
|
struct zfcp_port *port;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
shost = adapter->scsi_host;
|
|
|
|
if (!shost)
|
|
|
|
return;
|
2008-07-02 08:56:36 +00:00
|
|
|
|
2009-11-24 15:53:58 +00:00
|
|
|
read_lock_irq(&adapter->port_list_lock);
|
|
|
|
list_for_each_entry(port, &adapter->port_list, list)
|
2009-11-24 15:53:59 +00:00
|
|
|
port->rport = NULL;
|
2009-11-24 15:53:58 +00:00
|
|
|
read_unlock_irq(&adapter->port_list_lock);
|
2008-07-02 08:56:36 +00:00
|
|
|
|
2005-08-27 18:07:54 +00:00
|
|
|
fc_remove_host(shost);
|
2005-04-16 22:20:36 +00:00
|
|
|
scsi_remove_host(shost);
|
|
|
|
scsi_host_put(shost);
|
|
|
|
adapter->scsi_host = NULL;
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2006-01-05 08:59:34 +00:00
|
|
|
static struct fc_host_statistics*
|
|
|
|
zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-01-05 08:59:34 +00:00
|
|
|
struct fc_host_statistics *fc_stats;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-05 08:59:34 +00:00
|
|
|
if (!adapter->fc_stats) {
|
|
|
|
fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
|
|
|
|
if (!fc_stats)
|
|
|
|
return NULL;
|
2009-11-24 15:53:59 +00:00
|
|
|
adapter->fc_stats = fc_stats; /* freed in adapter_release */
|
2006-01-05 08:59:34 +00:00
|
|
|
}
|
|
|
|
memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
|
|
|
|
return adapter->fc_stats;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
|
|
|
|
struct fsf_qtcb_bottom_port *data,
|
|
|
|
struct fsf_qtcb_bottom_port *old)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-07-02 08:56:36 +00:00
|
|
|
fc_stats->seconds_since_last_reset =
|
|
|
|
data->seconds_since_last_reset - old->seconds_since_last_reset;
|
2006-01-05 08:59:34 +00:00
|
|
|
fc_stats->tx_frames = data->tx_frames - old->tx_frames;
|
|
|
|
fc_stats->tx_words = data->tx_words - old->tx_words;
|
|
|
|
fc_stats->rx_frames = data->rx_frames - old->rx_frames;
|
|
|
|
fc_stats->rx_words = data->rx_words - old->rx_words;
|
|
|
|
fc_stats->lip_count = data->lip - old->lip;
|
|
|
|
fc_stats->nos_count = data->nos - old->nos;
|
|
|
|
fc_stats->error_frames = data->error_frames - old->error_frames;
|
|
|
|
fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
|
|
|
|
fc_stats->link_failure_count = data->link_failure - old->link_failure;
|
|
|
|
fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
|
2008-07-02 08:56:36 +00:00
|
|
|
fc_stats->loss_of_signal_count =
|
|
|
|
data->loss_of_signal - old->loss_of_signal;
|
|
|
|
fc_stats->prim_seq_protocol_err_count =
|
|
|
|
data->psp_error_counts - old->psp_error_counts;
|
|
|
|
fc_stats->invalid_tx_word_count =
|
|
|
|
data->invalid_tx_words - old->invalid_tx_words;
|
2006-01-05 08:59:34 +00:00
|
|
|
fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
|
2008-07-02 08:56:36 +00:00
|
|
|
fc_stats->fcp_input_requests =
|
|
|
|
data->input_requests - old->input_requests;
|
|
|
|
fc_stats->fcp_output_requests =
|
|
|
|
data->output_requests - old->output_requests;
|
|
|
|
fc_stats->fcp_control_requests =
|
|
|
|
data->control_requests - old->control_requests;
|
2006-01-05 08:59:34 +00:00
|
|
|
fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
|
|
|
|
fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
|
|
|
|
struct fsf_qtcb_bottom_port *data)
|
2006-01-05 08:59:34 +00:00
|
|
|
{
|
|
|
|
fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
|
|
|
|
fc_stats->tx_frames = data->tx_frames;
|
|
|
|
fc_stats->tx_words = data->tx_words;
|
|
|
|
fc_stats->rx_frames = data->rx_frames;
|
|
|
|
fc_stats->rx_words = data->rx_words;
|
|
|
|
fc_stats->lip_count = data->lip;
|
|
|
|
fc_stats->nos_count = data->nos;
|
|
|
|
fc_stats->error_frames = data->error_frames;
|
|
|
|
fc_stats->dumped_frames = data->dumped_frames;
|
|
|
|
fc_stats->link_failure_count = data->link_failure;
|
|
|
|
fc_stats->loss_of_sync_count = data->loss_of_sync;
|
|
|
|
fc_stats->loss_of_signal_count = data->loss_of_signal;
|
|
|
|
fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
|
|
|
|
fc_stats->invalid_tx_word_count = data->invalid_tx_words;
|
|
|
|
fc_stats->invalid_crc_count = data->invalid_crcs;
|
|
|
|
fc_stats->fcp_input_requests = data->input_requests;
|
|
|
|
fc_stats->fcp_output_requests = data->output_requests;
|
|
|
|
fc_stats->fcp_control_requests = data->control_requests;
|
|
|
|
fc_stats->fcp_input_megabytes = data->input_mb;
|
|
|
|
fc_stats->fcp_output_megabytes = data->output_mb;
|
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
|
2006-01-05 08:59:34 +00:00
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter;
|
|
|
|
struct fc_host_statistics *fc_stats;
|
|
|
|
struct fsf_qtcb_bottom_port *data;
|
|
|
|
int ret;
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
adapter = (struct zfcp_adapter *)host->hostdata[0];
|
2006-01-05 08:59:34 +00:00
|
|
|
fc_stats = zfcp_init_fc_host_stats(adapter);
|
|
|
|
if (!fc_stats)
|
|
|
|
return NULL;
|
|
|
|
|
2006-05-22 16:17:30 +00:00
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
2006-01-05 08:59:34 +00:00
|
|
|
if (!data)
|
|
|
|
return NULL;
|
|
|
|
|
2009-08-18 13:43:19 +00:00
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
2006-01-05 08:59:34 +00:00
|
|
|
if (ret) {
|
|
|
|
kfree(data);
|
2008-07-02 08:56:36 +00:00
|
|
|
return NULL;
|
2006-01-05 08:59:34 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (adapter->stats_reset &&
|
|
|
|
((jiffies/HZ - adapter->stats_reset) <
|
2008-07-02 08:56:36 +00:00
|
|
|
data->seconds_since_last_reset))
|
2006-01-05 08:59:34 +00:00
|
|
|
zfcp_adjust_fc_host_stats(fc_stats, data,
|
|
|
|
adapter->stats_reset_data);
|
2008-07-02 08:56:36 +00:00
|
|
|
else
|
2006-01-05 08:59:34 +00:00
|
|
|
zfcp_set_fc_host_stats(fc_stats, data);
|
|
|
|
|
|
|
|
kfree(data);
|
|
|
|
return fc_stats;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-01-05 08:59:34 +00:00
|
|
|
struct zfcp_adapter *adapter;
|
2008-07-02 08:56:36 +00:00
|
|
|
struct fsf_qtcb_bottom_port *data;
|
2006-01-05 08:59:34 +00:00
|
|
|
int ret;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-05 08:59:34 +00:00
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
2006-05-22 16:17:30 +00:00
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
2006-01-05 08:59:34 +00:00
|
|
|
if (!data)
|
|
|
|
return;
|
|
|
|
|
2009-08-18 13:43:19 +00:00
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
2008-07-02 08:56:36 +00:00
|
|
|
if (ret)
|
2007-08-08 08:47:02 +00:00
|
|
|
kfree(data);
|
2008-07-02 08:56:36 +00:00
|
|
|
else {
|
2006-01-05 08:59:34 +00:00
|
|
|
adapter->stats_reset = jiffies/HZ;
|
2008-07-02 08:56:36 +00:00
|
|
|
kfree(adapter->stats_reset_data);
|
2006-01-05 08:59:34 +00:00
|
|
|
adapter->stats_reset_data = data; /* finally freed in
|
2009-11-24 15:53:59 +00:00
|
|
|
adapter_release */
|
2006-01-05 08:59:34 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-06-10 16:20:59 +00:00
|
|
|
static void zfcp_get_host_port_state(struct Scsi_Host *shost)
|
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter =
|
|
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
int status = atomic_read(&adapter->status);
|
|
|
|
|
|
|
|
if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
|
|
|
|
!(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
|
|
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
|
|
|
|
else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
|
|
|
|
fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
|
|
|
|
else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
|
|
|
|
else
|
|
|
|
fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
|
|
|
|
}
|
|
|
|
|
2006-05-22 16:25:56 +00:00
|
|
|
static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
|
|
|
|
{
|
|
|
|
rport->dev_loss_tmo = timeout;
|
|
|
|
}
|
|
|
|
|
2009-03-02 12:09:08 +00:00
|
|
|
/**
|
|
|
|
* zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
|
|
|
|
* @rport: The FC rport where to teminate I/O
|
|
|
|
*
|
|
|
|
* Abort all pending SCSI commands for a port by closing the
|
2009-11-24 15:53:58 +00:00
|
|
|
* port. Using a reopen avoiding a conflict with a shutdown
|
2009-03-02 12:09:08 +00:00
|
|
|
* overwriting a reopen.
|
|
|
|
*/
|
|
|
|
static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
|
|
|
|
{
|
2009-04-17 13:08:15 +00:00
|
|
|
struct zfcp_port *port;
|
2009-08-18 13:43:24 +00:00
|
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
|
|
struct zfcp_adapter *adapter =
|
|
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
2009-04-17 13:08:15 +00:00
|
|
|
|
2009-08-18 13:43:24 +00:00
|
|
|
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
|
2009-03-02 12:09:08 +00:00
|
|
|
|
2009-04-17 13:08:15 +00:00
|
|
|
if (port) {
|
|
|
|
zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
|
2010-02-17 10:18:56 +00:00
|
|
|
put_device(&port->dev);
|
2009-04-17 13:08:15 +00:00
|
|
|
}
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void zfcp_scsi_rport_register(struct zfcp_port *port)
|
|
|
|
{
|
|
|
|
struct fc_rport_identifiers ids;
|
|
|
|
struct fc_rport *rport;
|
|
|
|
|
2009-07-13 13:06:11 +00:00
|
|
|
if (port->rport)
|
|
|
|
return;
|
|
|
|
|
2009-03-02 12:09:08 +00:00
|
|
|
ids.node_name = port->wwnn;
|
|
|
|
ids.port_name = port->wwpn;
|
|
|
|
ids.port_id = port->d_id;
|
|
|
|
ids.roles = FC_RPORT_ROLE_FCP_TARGET;
|
|
|
|
|
|
|
|
rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
|
|
|
|
if (!rport) {
|
|
|
|
dev_err(&port->adapter->ccw_device->dev,
|
|
|
|
"Registering port 0x%016Lx failed\n",
|
|
|
|
(unsigned long long)port->wwpn);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
rport->maxframe_size = port->maxframe_size;
|
|
|
|
rport->supported_classes = port->supported_classes;
|
|
|
|
port->rport = rport;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void zfcp_scsi_rport_block(struct zfcp_port *port)
|
|
|
|
{
|
2009-04-17 13:08:15 +00:00
|
|
|
struct fc_rport *rport = port->rport;
|
|
|
|
|
2009-07-13 13:06:11 +00:00
|
|
|
if (rport) {
|
2009-04-17 13:08:15 +00:00
|
|
|
fc_remote_port_delete(rport);
|
2009-07-13 13:06:11 +00:00
|
|
|
port->rport = NULL;
|
|
|
|
}
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
|
|
|
|
{
|
2010-02-17 10:18:56 +00:00
|
|
|
get_device(&port->dev);
|
2009-03-02 12:09:08 +00:00
|
|
|
port->rport_task = RPORT_ADD;
|
|
|
|
|
2009-08-18 13:43:17 +00:00
|
|
|
if (!queue_work(port->adapter->work_queue, &port->rport_work))
|
2010-02-17 10:18:56 +00:00
|
|
|
put_device(&port->dev);
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
|
|
|
|
{
|
2010-02-17 10:18:56 +00:00
|
|
|
get_device(&port->dev);
|
2009-03-02 12:09:08 +00:00
|
|
|
port->rport_task = RPORT_DEL;
|
|
|
|
|
2009-08-18 13:43:17 +00:00
|
|
|
if (port->rport && queue_work(port->adapter->work_queue,
|
|
|
|
&port->rport_work))
|
2009-08-18 13:43:06 +00:00
|
|
|
return;
|
|
|
|
|
2010-02-17 10:18:56 +00:00
|
|
|
put_device(&port->dev);
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
|
|
|
|
{
|
2009-11-24 15:53:58 +00:00
|
|
|
unsigned long flags;
|
2009-03-02 12:09:08 +00:00
|
|
|
struct zfcp_port *port;
|
|
|
|
|
2009-11-24 15:53:58 +00:00
|
|
|
read_lock_irqsave(&adapter->port_list_lock, flags);
|
|
|
|
list_for_each_entry(port, &adapter->port_list, list)
|
2009-03-02 12:09:08 +00:00
|
|
|
zfcp_scsi_schedule_rport_block(port);
|
2009-11-24 15:53:58 +00:00
|
|
|
read_unlock_irqrestore(&adapter->port_list_lock, flags);
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void zfcp_scsi_rport_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct zfcp_port *port = container_of(work, struct zfcp_port,
|
|
|
|
rport_work);
|
|
|
|
|
|
|
|
while (port->rport_task) {
|
|
|
|
if (port->rport_task == RPORT_ADD) {
|
|
|
|
port->rport_task = RPORT_NONE;
|
|
|
|
zfcp_scsi_rport_register(port);
|
|
|
|
} else {
|
|
|
|
port->rport_task = RPORT_NONE;
|
|
|
|
zfcp_scsi_rport_block(port);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-02-17 10:18:56 +00:00
|
|
|
put_device(&port->dev);
|
2009-03-02 12:09:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-04-17 13:08:04 +00:00
|
|
|
void zfcp_scsi_scan(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
|
|
|
|
scsi_work);
|
|
|
|
struct fc_rport *rport;
|
|
|
|
|
|
|
|
flush_work(&unit->port->rport_work);
|
|
|
|
rport = unit->port->rport;
|
|
|
|
|
|
|
|
if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
|
|
|
|
scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
|
|
|
|
scsilun_to_int((struct scsi_lun *)
|
|
|
|
&unit->fcp_lun), 0);
|
|
|
|
|
2010-02-17 10:18:56 +00:00
|
|
|
put_device(&unit->dev);
|
2009-04-17 13:08:04 +00:00
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
struct fc_function_template zfcp_transport_functions = {
|
|
|
|
.show_starget_port_id = 1,
|
|
|
|
.show_starget_port_name = 1,
|
|
|
|
.show_starget_node_name = 1,
|
2005-08-27 18:07:54 +00:00
|
|
|
.show_rport_supported_classes = 1,
|
2006-05-22 16:24:33 +00:00
|
|
|
.show_rport_maxframe_size = 1,
|
2006-05-22 16:25:56 +00:00
|
|
|
.show_rport_dev_loss_tmo = 1,
|
2005-08-27 18:07:54 +00:00
|
|
|
.show_host_node_name = 1,
|
|
|
|
.show_host_port_name = 1,
|
2006-01-13 01:26:11 +00:00
|
|
|
.show_host_permanent_port_name = 1,
|
2005-08-27 18:07:54 +00:00
|
|
|
.show_host_supported_classes = 1,
|
2009-11-24 15:54:17 +00:00
|
|
|
.show_host_supported_fc4s = 1,
|
2006-01-13 01:26:11 +00:00
|
|
|
.show_host_supported_speeds = 1,
|
2005-09-19 14:56:17 +00:00
|
|
|
.show_host_maxframe_size = 1,
|
2005-08-27 18:07:54 +00:00
|
|
|
.show_host_serial_number = 1,
|
2006-01-05 08:59:34 +00:00
|
|
|
.get_fc_host_stats = zfcp_get_fc_host_stats,
|
|
|
|
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
|
2006-05-22 16:25:56 +00:00
|
|
|
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
|
2008-06-10 16:20:59 +00:00
|
|
|
.get_host_port_state = zfcp_get_host_port_state,
|
2009-03-02 12:09:08 +00:00
|
|
|
.terminate_rport_io = zfcp_scsi_terminate_rport_io,
|
2008-06-10 16:20:59 +00:00
|
|
|
.show_host_port_state = 1,
|
2009-11-24 15:54:17 +00:00
|
|
|
.show_host_active_fc4s = 1,
|
2009-11-24 15:54:13 +00:00
|
|
|
.bsg_request = zfcp_fc_exec_bsg_job,
|
2010-01-14 16:19:01 +00:00
|
|
|
.bsg_timeout = zfcp_fc_timeout_bsg_job,
|
2006-01-05 08:59:34 +00:00
|
|
|
/* no functions registered for following dynamic attributes but
|
|
|
|
directly set by LLDD */
|
2006-01-13 01:26:11 +00:00
|
|
|
.show_host_port_type = 1,
|
2005-09-19 14:56:17 +00:00
|
|
|
.show_host_speed = 1,
|
|
|
|
.show_host_port_id = 1,
|
2007-08-28 07:31:09 +00:00
|
|
|
.disable_target_scan = 1,
|
2009-11-24 15:54:13 +00:00
|
|
|
.dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
2008-07-02 08:56:36 +00:00
|
|
|
struct zfcp_data zfcp_data = {
|
|
|
|
.scsi_host_template = {
|
|
|
|
.name = "zfcp",
|
|
|
|
.module = THIS_MODULE,
|
|
|
|
.proc_name = "zfcp",
|
2009-05-15 11:18:16 +00:00
|
|
|
.change_queue_depth = zfcp_scsi_change_queue_depth,
|
2008-07-02 08:56:36 +00:00
|
|
|
.slave_alloc = zfcp_scsi_slave_alloc,
|
|
|
|
.slave_configure = zfcp_scsi_slave_configure,
|
|
|
|
.slave_destroy = zfcp_scsi_slave_destroy,
|
|
|
|
.queuecommand = zfcp_scsi_queuecommand,
|
|
|
|
.eh_abort_handler = zfcp_scsi_eh_abort_handler,
|
|
|
|
.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
|
|
|
|
.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
|
|
|
|
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
|
|
|
|
.can_queue = 4096,
|
|
|
|
.this_id = -1,
|
|
|
|
.sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
|
|
|
|
.cmd_per_lun = 1,
|
|
|
|
.use_clustering = 1,
|
|
|
|
.sdev_attrs = zfcp_sysfs_sdev_attrs,
|
|
|
|
.max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8),
|
2008-07-02 08:56:38 +00:00
|
|
|
.shost_attrs = zfcp_sysfs_shost_attrs,
|
2008-07-02 08:56:36 +00:00
|
|
|
},
|
|
|
|
};
|