2005-04-16 22:20:36 +00:00
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/*
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*
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* linux/drivers/s390/scsi/zfcp_scsi.c
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*
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* FCP adapter driver for IBM eServer zSeries
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*
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* (C) Copyright IBM Corp. 2002, 2004
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*
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* Author(s): Martin Peschke <mpeschke@de.ibm.com>
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* Raimund Schroeder <raimund.schroeder@de.ibm.com>
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* Aron Zeh
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* Wolfgang Taphorn
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* Stefan Bader <stefan.bader@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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* Andreas Herrmann <aherrman@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI
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#define ZFCP_SCSI_REVISION "$Revision: 1.74 $"
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#include "zfcp_ext.h"
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static void zfcp_scsi_slave_destroy(struct scsi_device *sdp);
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static int zfcp_scsi_slave_alloc(struct scsi_device *sdp);
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static int zfcp_scsi_slave_configure(struct scsi_device *sdp);
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static int zfcp_scsi_queuecommand(struct scsi_cmnd *,
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void (*done) (struct scsi_cmnd *));
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static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
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static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
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static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *);
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static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
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static int zfcp_task_management_function(struct zfcp_unit *, u8);
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static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, scsi_id_t,
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scsi_lun_t);
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static struct zfcp_port *zfcp_port_lookup(struct zfcp_adapter *, int,
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scsi_id_t);
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static struct device_attribute *zfcp_sysfs_sdev_attrs[];
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struct scsi_transport_template *zfcp_transport_template;
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struct zfcp_data zfcp_data = {
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.scsi_host_template = {
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name: ZFCP_NAME,
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proc_name: "zfcp",
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proc_info: NULL,
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detect: NULL,
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slave_alloc: zfcp_scsi_slave_alloc,
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slave_configure: zfcp_scsi_slave_configure,
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slave_destroy: zfcp_scsi_slave_destroy,
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queuecommand: zfcp_scsi_queuecommand,
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eh_abort_handler: zfcp_scsi_eh_abort_handler,
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eh_device_reset_handler: zfcp_scsi_eh_device_reset_handler,
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eh_bus_reset_handler: zfcp_scsi_eh_bus_reset_handler,
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eh_host_reset_handler: zfcp_scsi_eh_host_reset_handler,
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/* FIXME(openfcp): Tune */
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can_queue: 4096,
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this_id: 0,
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/*
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* FIXME:
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* one less? can zfcp_create_sbale cope with it?
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*/
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sg_tablesize: ZFCP_MAX_SBALES_PER_REQ,
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cmd_per_lun: 1,
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unchecked_isa_dma: 0,
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use_clustering: 1,
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sdev_attrs: zfcp_sysfs_sdev_attrs,
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},
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.driver_version = ZFCP_VERSION,
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/* rest initialised with zeros */
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};
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/* Find start of Response Information in FCP response unit*/
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char *
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zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
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{
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char *fcp_rsp_info_ptr;
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fcp_rsp_info_ptr =
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(unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
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return fcp_rsp_info_ptr;
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}
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/* Find start of Sense Information in FCP response unit*/
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char *
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zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
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{
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char *fcp_sns_info_ptr;
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fcp_sns_info_ptr =
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(unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
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if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)
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fcp_sns_info_ptr = (char *) fcp_sns_info_ptr +
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fcp_rsp_iu->fcp_rsp_len;
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return fcp_sns_info_ptr;
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}
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fcp_dl_t *
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zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd)
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{
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int additional_length = fcp_cmd->add_fcp_cdb_length << 2;
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fcp_dl_t *fcp_dl_addr;
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fcp_dl_addr = (fcp_dl_t *)
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((unsigned char *) fcp_cmd +
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sizeof (struct fcp_cmnd_iu) + additional_length);
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/*
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* fcp_dl_addr = start address of fcp_cmnd structure +
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* size of fixed part + size of dynamically sized add_dcp_cdb field
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* SEE FCP-2 documentation
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*/
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return fcp_dl_addr;
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}
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fcp_dl_t
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zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd)
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{
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return *zfcp_get_fcp_dl_ptr(fcp_cmd);
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}
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void
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zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
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{
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*zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl;
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}
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/*
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* note: it's a bit-or operation not an assignment
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* regarding the specified byte
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*/
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static inline void
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set_byte(u32 * result, char status, char pos)
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{
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*result |= status << (pos * 8);
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}
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void
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set_host_byte(u32 * result, char status)
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{
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set_byte(result, status, 2);
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}
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void
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set_driver_byte(u32 * result, char status)
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{
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set_byte(result, status, 3);
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}
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/*
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* function: zfcp_scsi_slave_alloc
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*
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* purpose:
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*
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* returns:
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*/
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static int
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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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unsigned long flags;
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int retval = -ENODEV;
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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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read_lock_irqsave(&zfcp_data.config_lock, flags);
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unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
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if (unit) {
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sdp->hostdata = unit;
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unit->device = sdp;
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zfcp_unit_get(unit);
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retval = 0;
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}
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read_unlock_irqrestore(&zfcp_data.config_lock, flags);
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out:
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return retval;
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}
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/*
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* function: zfcp_scsi_slave_destroy
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*
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* purpose:
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*
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* returns:
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*/
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static void
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zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
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{
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struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
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if (unit) {
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sdpnt->hostdata = NULL;
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unit->device = NULL;
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zfcp_unit_put(unit);
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} else {
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ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
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"address %p\n", sdpnt);
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}
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}
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/*
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* called from scsi midlayer to allow finetuning of a device.
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*/
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static int
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zfcp_scsi_slave_configure(struct scsi_device *sdp)
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{
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if (sdp->tagged_supported)
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scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN);
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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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/**
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* zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function
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* @scpnt: pointer to struct scsi_cmnd where result is set
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* @result: result to be set in scpnt (e.g. DID_ERROR)
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*/
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static void
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zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
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{
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set_host_byte(&scpnt->result, result);
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zfcp_cmd_dbf_event_scsi("failing", scpnt);
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/* return directly */
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scpnt->scsi_done(scpnt);
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}
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/**
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* zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and
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* zfcp_scsi_command_sync
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* @adapter: adapter where scsi command is issued
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* @unit: unit to which scsi command is sent
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* @scpnt: scsi command to be sent
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* @timer: timer to be started if request is successfully initiated
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*
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* Note: In scsi_done function must be set in scpnt.
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*/
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int
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zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit,
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struct scsi_cmnd *scpnt, struct timer_list *timer)
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{
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int tmp;
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int retval;
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retval = 0;
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BUG_ON((adapter == NULL) || (adapter != unit->port->adapter));
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BUG_ON(scpnt->scsi_done == NULL);
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if (unlikely(NULL == unit)) {
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zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
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goto out;
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}
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if (unlikely(
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atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) ||
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!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) {
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ZFCP_LOG_DEBUG("stopping SCSI I/O on unit 0x%016Lx on port "
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"0x%016Lx on adapter %s\n",
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unit->fcp_lun, unit->port->wwpn,
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zfcp_get_busid_by_adapter(adapter));
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zfcp_scsi_command_fail(scpnt, DID_ERROR);
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goto out;
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}
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if (unlikely(
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!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))) {
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ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx "
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"on port 0x%016Lx in recovery\n",
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zfcp_get_busid_by_unit(unit),
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unit->fcp_lun, unit->port->wwpn);
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retval = SCSI_MLQUEUE_DEVICE_BUSY;
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goto out;
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}
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tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, timer,
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ZFCP_REQ_AUTO_CLEANUP);
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if (unlikely(tmp < 0)) {
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ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n");
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retval = SCSI_MLQUEUE_HOST_BUSY;
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}
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out:
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return retval;
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}
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void
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zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt)
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{
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struct completion *wait = (struct completion *) scpnt->SCp.ptr;
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complete(wait);
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}
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/**
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* zfcp_scsi_command_sync - send a SCSI command and wait for completion
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* @unit: unit where command is sent to
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* @scpnt: scsi command to be sent
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* @timer: timer to be started if request is successfully initiated
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* Return: 0
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*
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* Errors are indicated in scpnt->result
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*/
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int
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zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt,
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struct timer_list *timer)
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{
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int ret;
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DECLARE_COMPLETION(wait);
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scpnt->SCp.ptr = (void *) &wait; /* silent re-use */
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scpnt->scsi_done = zfcp_scsi_command_sync_handler;
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ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, timer);
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if (ret == 0)
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wait_for_completion(&wait);
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scpnt->SCp.ptr = NULL;
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return 0;
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}
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/*
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* function: zfcp_scsi_queuecommand
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*
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* purpose: enqueues a SCSI command to the specified target device
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*
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* returns: 0 - success, SCSI command enqueued
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* !0 - failure
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*/
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int
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zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
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void (*done) (struct scsi_cmnd *))
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{
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struct zfcp_unit *unit;
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struct zfcp_adapter *adapter;
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/* reset the status for this request */
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|
|
scpnt->result = 0;
|
|
|
|
scpnt->host_scribble = NULL;
|
|
|
|
scpnt->scsi_done = done;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* figure out adapter and target device
|
|
|
|
* (stored there by zfcp_scsi_slave_alloc)
|
|
|
|
*/
|
|
|
|
adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
|
|
|
|
unit = (struct zfcp_unit *) scpnt->device->hostdata;
|
|
|
|
|
|
|
|
return zfcp_scsi_command_async(adapter, unit, scpnt, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function: zfcp_unit_lookup
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*
|
|
|
|
* context:
|
|
|
|
*/
|
|
|
|
static struct zfcp_unit *
|
|
|
|
zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id,
|
|
|
|
scsi_lun_t lun)
|
|
|
|
{
|
|
|
|
struct zfcp_port *port;
|
|
|
|
struct zfcp_unit *unit, *retval = NULL;
|
|
|
|
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
|
|
if (id != port->scsi_id)
|
|
|
|
continue;
|
|
|
|
list_for_each_entry(unit, &port->unit_list_head, list) {
|
|
|
|
if (lun == unit->scsi_lun) {
|
|
|
|
retval = unit;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct zfcp_port *
|
|
|
|
zfcp_port_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id)
|
|
|
|
{
|
|
|
|
struct zfcp_port *port;
|
|
|
|
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
|
|
if (id == port->scsi_id)
|
|
|
|
return port;
|
|
|
|
}
|
|
|
|
return (struct zfcp_port *) NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function: zfcp_scsi_eh_abort_handler
|
|
|
|
*
|
|
|
|
* purpose: tries to abort the specified (timed out) SCSI command
|
|
|
|
*
|
|
|
|
* note: We do not need to care for a SCSI command which completes
|
|
|
|
* normally but late during this abort routine runs.
|
|
|
|
* We are allowed to return late commands to the SCSI stack.
|
|
|
|
* It tracks the state of commands and will handle late commands.
|
|
|
|
* (Usually, the normal completion of late commands is ignored with
|
|
|
|
* respect to the running abort operation. Grep for 'done_late'
|
|
|
|
* in the SCSI stacks sources.)
|
|
|
|
*
|
|
|
|
* returns: SUCCESS - command has been aborted and cleaned up in internal
|
|
|
|
* bookkeeping,
|
|
|
|
* SCSI stack won't be called for aborted command
|
|
|
|
* FAILED - otherwise
|
|
|
|
*/
|
|
|
|
int
|
2005-05-28 11:54:40 +00:00
|
|
|
__zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int retval = SUCCESS;
|
|
|
|
struct zfcp_fsf_req *new_fsf_req, *old_fsf_req;
|
|
|
|
struct zfcp_adapter *adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
|
|
|
|
struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
|
|
|
|
struct zfcp_port *port = unit->port;
|
|
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
|
|
union zfcp_req_data *req_data = NULL;
|
|
|
|
unsigned long flags;
|
|
|
|
u32 status = 0;
|
|
|
|
|
|
|
|
/* the components of a abort_dbf record (fixed size record) */
|
|
|
|
u64 dbf_scsi_cmnd = (unsigned long) scpnt;
|
|
|
|
char dbf_opcode[ZFCP_ABORT_DBF_LENGTH];
|
|
|
|
wwn_t dbf_wwn = port->wwpn;
|
|
|
|
fcp_lun_t dbf_fcp_lun = unit->fcp_lun;
|
|
|
|
u64 dbf_retries = scpnt->retries;
|
|
|
|
u64 dbf_allowed = scpnt->allowed;
|
|
|
|
u64 dbf_timeout = 0;
|
|
|
|
u64 dbf_fsf_req = 0;
|
|
|
|
u64 dbf_fsf_status = 0;
|
|
|
|
u64 dbf_fsf_qual[2] = { 0, 0 };
|
|
|
|
char dbf_result[ZFCP_ABORT_DBF_LENGTH] = "##undef";
|
|
|
|
|
|
|
|
memset(dbf_opcode, 0, ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
memcpy(dbf_opcode,
|
|
|
|
scpnt->cmnd,
|
|
|
|
min(scpnt->cmd_len, (unsigned char) ZFCP_ABORT_DBF_LENGTH));
|
|
|
|
|
|
|
|
ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
|
|
|
|
scpnt, zfcp_get_busid_by_adapter(adapter));
|
|
|
|
|
|
|
|
spin_unlock_irq(scsi_host->host_lock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Race condition between normal (late) completion and abort has
|
|
|
|
* to be avoided.
|
|
|
|
* The entirity of all accesses to scsi_req have to be atomic.
|
|
|
|
* scsi_req is usually part of the fsf_req and thus we block the
|
|
|
|
* release of fsf_req as long as we need to access scsi_req.
|
|
|
|
*/
|
|
|
|
write_lock_irqsave(&adapter->abort_lock, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check whether command has just completed and can not be aborted.
|
|
|
|
* Even if the command has just been completed late, we can access
|
|
|
|
* scpnt since the SCSI stack does not release it at least until
|
|
|
|
* this routine returns. (scpnt is parameter passed to this routine
|
|
|
|
* and must not disappear during abort even on late completion.)
|
|
|
|
*/
|
|
|
|
req_data = (union zfcp_req_data *) scpnt->host_scribble;
|
|
|
|
/* DEBUG */
|
|
|
|
ZFCP_LOG_DEBUG("req_data=%p\n", req_data);
|
|
|
|
if (!req_data) {
|
|
|
|
ZFCP_LOG_DEBUG("late command completion overtook abort\n");
|
|
|
|
/*
|
|
|
|
* That's it.
|
|
|
|
* Do not initiate abort but return SUCCESS.
|
|
|
|
*/
|
|
|
|
write_unlock_irqrestore(&adapter->abort_lock, flags);
|
|
|
|
retval = SUCCESS;
|
|
|
|
strncpy(dbf_result, "##late1", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Figure out which fsf_req needs to be aborted. */
|
|
|
|
old_fsf_req = req_data->send_fcp_command_task.fsf_req;
|
|
|
|
|
|
|
|
dbf_fsf_req = (unsigned long) old_fsf_req;
|
|
|
|
dbf_timeout =
|
|
|
|
(jiffies - req_data->send_fcp_command_task.start_jiffies) / HZ;
|
|
|
|
|
|
|
|
ZFCP_LOG_DEBUG("old_fsf_req=%p\n", old_fsf_req);
|
|
|
|
if (!old_fsf_req) {
|
|
|
|
write_unlock_irqrestore(&adapter->abort_lock, flags);
|
|
|
|
ZFCP_LOG_NORMAL("bug: no old fsf request found\n");
|
|
|
|
ZFCP_LOG_NORMAL("req_data:\n");
|
|
|
|
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
|
|
|
|
(char *) req_data, sizeof (union zfcp_req_data));
|
|
|
|
ZFCP_LOG_NORMAL("scsi_cmnd:\n");
|
|
|
|
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
|
|
|
|
(char *) scpnt, sizeof (struct scsi_cmnd));
|
|
|
|
retval = FAILED;
|
|
|
|
strncpy(dbf_result, "##bug:r", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
old_fsf_req->data.send_fcp_command_task.scsi_cmnd = NULL;
|
|
|
|
/* mark old request as being aborted */
|
|
|
|
old_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
|
|
|
|
/*
|
|
|
|
* We have to collect all information (e.g. unit) needed by
|
|
|
|
* zfcp_fsf_abort_fcp_command before calling that routine
|
|
|
|
* since that routine is not allowed to access
|
|
|
|
* fsf_req which it is going to abort.
|
|
|
|
* This is because of we need to release fsf_req_list_lock
|
|
|
|
* before calling zfcp_fsf_abort_fcp_command.
|
|
|
|
* Since this lock will not be held, fsf_req may complete
|
|
|
|
* late and may be released meanwhile.
|
|
|
|
*/
|
|
|
|
ZFCP_LOG_DEBUG("unit 0x%016Lx (%p)\n", unit->fcp_lun, unit);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We block (call schedule)
|
|
|
|
* That's why we must release the lock and enable the
|
|
|
|
* interrupts before.
|
|
|
|
* On the other hand we do not need the lock anymore since
|
|
|
|
* all critical accesses to scsi_req are done.
|
|
|
|
*/
|
|
|
|
write_unlock_irqrestore(&adapter->abort_lock, flags);
|
|
|
|
/* call FSF routine which does the abort */
|
|
|
|
new_fsf_req = zfcp_fsf_abort_fcp_command((unsigned long) old_fsf_req,
|
|
|
|
adapter, unit, 0);
|
|
|
|
ZFCP_LOG_DEBUG("new_fsf_req=%p\n", new_fsf_req);
|
|
|
|
if (!new_fsf_req) {
|
|
|
|
retval = FAILED;
|
|
|
|
ZFCP_LOG_NORMAL("error: initiation of Abort FCP Cmnd "
|
|
|
|
"failed\n");
|
|
|
|
strncpy(dbf_result, "##nores", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* wait for completion of abort */
|
|
|
|
ZFCP_LOG_DEBUG("waiting for cleanup...\n");
|
|
|
|
#if 1
|
|
|
|
/*
|
|
|
|
* FIXME:
|
|
|
|
* copying zfcp_fsf_req_wait_and_cleanup code is not really nice
|
|
|
|
*/
|
|
|
|
__wait_event(new_fsf_req->completion_wq,
|
|
|
|
new_fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
|
|
|
|
status = new_fsf_req->status;
|
|
|
|
dbf_fsf_status = new_fsf_req->qtcb->header.fsf_status;
|
|
|
|
/*
|
|
|
|
* Ralphs special debug load provides timestamps in the FSF
|
|
|
|
* status qualifier. This might be specified later if being
|
|
|
|
* useful for debugging aborts.
|
|
|
|
*/
|
|
|
|
dbf_fsf_qual[0] =
|
|
|
|
*(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[0];
|
|
|
|
dbf_fsf_qual[1] =
|
|
|
|
*(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[2];
|
2005-06-13 11:20:35 +00:00
|
|
|
zfcp_fsf_req_free(new_fsf_req);
|
2005-04-16 22:20:36 +00:00
|
|
|
#else
|
|
|
|
retval = zfcp_fsf_req_wait_and_cleanup(new_fsf_req,
|
|
|
|
ZFCP_UNINTERRUPTIBLE, &status);
|
|
|
|
#endif
|
|
|
|
ZFCP_LOG_DEBUG("Waiting for cleanup complete, status=0x%x\n", status);
|
|
|
|
/* status should be valid since signals were not permitted */
|
|
|
|
if (status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
|
|
|
|
retval = SUCCESS;
|
|
|
|
strncpy(dbf_result, "##succ", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
} else if (status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
|
|
|
|
retval = SUCCESS;
|
|
|
|
strncpy(dbf_result, "##late2", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
} else {
|
|
|
|
retval = FAILED;
|
|
|
|
strncpy(dbf_result, "##fail", ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_scsi_cmnd, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_opcode, ZFCP_ABORT_DBF_LENGTH);
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_wwn, sizeof (wwn_t));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_fcp_lun, sizeof (fcp_lun_t));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_retries, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_allowed, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_timeout, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_fsf_req, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_fsf_status, sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_fsf_qual[0], sizeof (u64));
|
|
|
|
debug_event(adapter->abort_dbf, 1, &dbf_fsf_qual[1], sizeof (u64));
|
|
|
|
debug_text_event(adapter->abort_dbf, 1, dbf_result);
|
|
|
|
|
|
|
|
spin_lock_irq(scsi_host->host_lock);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2005-05-28 11:54:40 +00:00
|
|
|
int
|
|
|
|
zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
|
|
spin_lock_irq(scsi_host->host_lock);
|
|
|
|
rc = __zfcp_scsi_eh_abort_handler(scpnt);
|
|
|
|
spin_unlock_irq(scsi_host->host_lock);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* function: zfcp_scsi_eh_device_reset_handler
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
|
|
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
|
|
|
|
|
|
if (!unit) {
|
|
|
|
ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n");
|
|
|
|
retval = SUCCESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
ZFCP_LOG_NORMAL("resetting unit 0x%016Lx\n", unit->fcp_lun);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we do not know whether the unit supports 'logical unit reset'
|
|
|
|
* then try 'logical unit reset' and proceed with 'target reset'
|
|
|
|
* if 'logical unit reset' fails.
|
|
|
|
* If the unit is known not to support 'logical unit reset' then
|
|
|
|
* skip 'logical unit reset' and try 'target reset' immediately.
|
|
|
|
*/
|
|
|
|
if (!atomic_test_mask(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET,
|
|
|
|
&unit->status)) {
|
|
|
|
retval =
|
|
|
|
zfcp_task_management_function(unit, FCP_LOGICAL_UNIT_RESET);
|
|
|
|
if (retval) {
|
|
|
|
ZFCP_LOG_DEBUG("unit reset failed (unit=%p)\n", unit);
|
|
|
|
if (retval == -ENOTSUPP)
|
|
|
|
atomic_set_mask
|
|
|
|
(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET,
|
|
|
|
&unit->status);
|
|
|
|
/* fall through and try 'target reset' next */
|
|
|
|
} else {
|
|
|
|
ZFCP_LOG_DEBUG("unit reset succeeded (unit=%p)\n",
|
|
|
|
unit);
|
|
|
|
/* avoid 'target reset' */
|
|
|
|
retval = SUCCESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
retval = zfcp_task_management_function(unit, FCP_TARGET_RESET);
|
|
|
|
if (retval) {
|
|
|
|
ZFCP_LOG_DEBUG("target reset failed (unit=%p)\n", unit);
|
|
|
|
retval = FAILED;
|
|
|
|
} else {
|
|
|
|
ZFCP_LOG_DEBUG("target reset succeeded (unit=%p)\n", unit);
|
|
|
|
retval = SUCCESS;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags)
|
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
|
|
|
int retval;
|
|
|
|
int status;
|
|
|
|
struct zfcp_fsf_req *fsf_req;
|
|
|
|
|
|
|
|
/* issue task management function */
|
|
|
|
fsf_req = zfcp_fsf_send_fcp_command_task_management
|
|
|
|
(adapter, unit, tm_flags, 0);
|
|
|
|
if (!fsf_req) {
|
|
|
|
ZFCP_LOG_INFO("error: creation of task management request "
|
|
|
|
"failed for unit 0x%016Lx on port 0x%016Lx on "
|
|
|
|
"adapter %s\n", unit->fcp_lun, unit->port->wwpn,
|
|
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
|
|
retval = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
retval = zfcp_fsf_req_wait_and_cleanup(fsf_req,
|
|
|
|
ZFCP_UNINTERRUPTIBLE, &status);
|
|
|
|
/*
|
|
|
|
* check completion status of task management function
|
|
|
|
* (status should always be valid since no signals permitted)
|
|
|
|
*/
|
|
|
|
if (status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED)
|
|
|
|
retval = -EIO;
|
|
|
|
else if (status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP)
|
|
|
|
retval = -ENOTSUPP;
|
|
|
|
else
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function: zfcp_scsi_eh_bus_reset_handler
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
|
|
|
int retval = 0;
|
|
|
|
struct zfcp_unit *unit;
|
|
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
|
|
|
|
|
|
unit = (struct zfcp_unit *) scpnt->device->hostdata;
|
|
|
|
ZFCP_LOG_NORMAL("bus reset because of problems with "
|
|
|
|
"unit 0x%016Lx\n", unit->fcp_lun);
|
|
|
|
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
|
|
|
|
zfcp_erp_wait(unit->port->adapter);
|
|
|
|
retval = SUCCESS;
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function: zfcp_scsi_eh_host_reset_handler
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
|
|
|
|
{
|
|
|
|
int retval = 0;
|
|
|
|
struct zfcp_unit *unit;
|
|
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
|
|
|
|
|
|
unit = (struct zfcp_unit *) scpnt->device->hostdata;
|
|
|
|
ZFCP_LOG_NORMAL("host reset because of problems with "
|
|
|
|
"unit 0x%016Lx\n", unit->fcp_lun);
|
|
|
|
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
|
|
|
|
zfcp_erp_wait(unit->port->adapter);
|
|
|
|
retval = SUCCESS;
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function:
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
|
|
|
|
{
|
|
|
|
int retval = 0;
|
|
|
|
static unsigned int unique_id = 0;
|
|
|
|
|
|
|
|
/* 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) {
|
|
|
|
ZFCP_LOG_NORMAL("error: registration with SCSI stack failed "
|
|
|
|
"for adapter %s ",
|
|
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
|
|
retval = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
ZFCP_LOG_DEBUG("host registered, scsi_host=%p\n", adapter->scsi_host);
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
adapter->scsi_host->unique_id = unique_id++; /* FIXME */
|
|
|
|
adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH;
|
|
|
|
adapter->scsi_host->transportt = zfcp_transport_template;
|
|
|
|
/*
|
|
|
|
* Reverse mapping of the host number to avoid race condition
|
|
|
|
*/
|
|
|
|
adapter->scsi_host_no = adapter->scsi_host->host_no;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* save a pointer to our own adapter data structure within
|
|
|
|
* hostdata field of SCSI host data structure
|
|
|
|
*/
|
|
|
|
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);
|
|
|
|
retval = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* function:
|
|
|
|
*
|
|
|
|
* purpose:
|
|
|
|
*
|
|
|
|
* returns:
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost;
|
|
|
|
|
|
|
|
shost = adapter->scsi_host;
|
|
|
|
if (!shost)
|
|
|
|
return;
|
|
|
|
scsi_remove_host(shost);
|
|
|
|
scsi_host_put(shost);
|
|
|
|
adapter->scsi_host = NULL;
|
|
|
|
adapter->scsi_host_no = 0;
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
zfcp_fsf_start_scsi_er_timer(struct zfcp_adapter *adapter)
|
|
|
|
{
|
|
|
|
adapter->scsi_er_timer.function = zfcp_fsf_scsi_er_timeout_handler;
|
|
|
|
adapter->scsi_er_timer.data = (unsigned long) adapter;
|
|
|
|
adapter->scsi_er_timer.expires = jiffies + ZFCP_SCSI_ER_TIMEOUT;
|
|
|
|
add_timer(&adapter->scsi_er_timer);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Support functions for FC transport class
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
zfcp_get_port_id(struct scsi_target *starget)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
|
struct zfcp_adapter *adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
struct zfcp_port *port;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
port = zfcp_port_lookup(adapter, starget->channel, starget->id);
|
|
|
|
if (port)
|
|
|
|
fc_starget_port_id(starget) = port->d_id;
|
|
|
|
else
|
|
|
|
fc_starget_port_id(starget) = -1;
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
zfcp_get_port_name(struct scsi_target *starget)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
|
struct zfcp_adapter *adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
struct zfcp_port *port;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
port = zfcp_port_lookup(adapter, starget->channel, starget->id);
|
|
|
|
if (port)
|
|
|
|
fc_starget_port_name(starget) = port->wwpn;
|
|
|
|
else
|
|
|
|
fc_starget_port_name(starget) = -1;
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
zfcp_get_node_name(struct scsi_target *starget)
|
|
|
|
{
|
|
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
|
struct zfcp_adapter *adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
struct zfcp_port *port;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
port = zfcp_port_lookup(adapter, starget->channel, starget->id);
|
|
|
|
if (port)
|
|
|
|
fc_starget_node_name(starget) = port->wwnn;
|
|
|
|
else
|
|
|
|
fc_starget_node_name(starget) = -1;
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct fc_function_template zfcp_transport_functions = {
|
|
|
|
.get_starget_port_id = zfcp_get_port_id,
|
|
|
|
.get_starget_port_name = zfcp_get_port_name,
|
|
|
|
.get_starget_node_name = zfcp_get_node_name,
|
|
|
|
.show_starget_port_id = 1,
|
|
|
|
.show_starget_port_name = 1,
|
|
|
|
.show_starget_node_name = 1,
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ZFCP_DEFINE_SCSI_ATTR
|
|
|
|
* @_name: name of show attribute
|
|
|
|
* @_format: format string
|
|
|
|
* @_value: value to print
|
|
|
|
*
|
|
|
|
* Generates attribute for a unit.
|
|
|
|
*/
|
|
|
|
#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
|
2005-05-17 10:43:37 +00:00
|
|
|
static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \
|
2005-04-16 22:20:36 +00:00
|
|
|
char *buf) \
|
|
|
|
{ \
|
|
|
|
struct scsi_device *sdev; \
|
|
|
|
struct zfcp_unit *unit; \
|
|
|
|
\
|
|
|
|
sdev = to_scsi_device(dev); \
|
|
|
|
unit = sdev->hostdata; \
|
|
|
|
return sprintf(buf, _format, _value); \
|
|
|
|
} \
|
|
|
|
\
|
|
|
|
static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
|
|
|
|
|
|
|
|
ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", zfcp_get_busid_by_unit(unit));
|
|
|
|
ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
|
|
|
|
ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
|
|
|
|
|
|
|
|
static struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
|
|
|
|
&dev_attr_fcp_lun,
|
|
|
|
&dev_attr_wwpn,
|
|
|
|
&dev_attr_hba_id,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
#undef ZFCP_LOG_AREA
|