840 lines
25 KiB
C
840 lines
25 KiB
C
/*
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* This file is part of the zfcp device driver for
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* FCP adapters for IBM System z9 and zSeries.
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*
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* (C) Copyright IBM Corp. 2002, 2006
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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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#include "zfcp_ext.h"
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#include <asm/atomic.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_host_reset_handler(struct scsi_cmnd *);
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static int zfcp_task_management_function(struct zfcp_unit *, u8,
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struct scsi_cmnd *);
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static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int,
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unsigned int, unsigned int);
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static struct device_attribute *zfcp_sysfs_sdev_attrs[];
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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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.module = THIS_MODULE,
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.proc_name = "zfcp",
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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_host_reset_handler,
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.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
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.can_queue = 4096,
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.this_id = -1,
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.sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
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.cmd_per_lun = 1,
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.use_clustering = 1,
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.sdev_attrs = zfcp_sysfs_sdev_attrs,
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.max_sectors = ZFCP_MAX_SECTORS,
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},
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.driver_version = ZFCP_VERSION,
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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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static 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(int *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(int *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(int *result, char status)
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{
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set_byte(result, status, 3);
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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 = -ENXIO;
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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 && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
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&unit->status)) {
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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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* zfcp_scsi_slave_destroy - called when scsi device is removed
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*
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* Remove reference to associated scsi device for an zfcp_unit.
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* Mark zfcp_unit as failed. The scsi device might be deleted via sysfs
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* or a scan for this device might have failed.
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*/
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static void 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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zfcp_erp_wait(unit->port->adapter);
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wait_event(unit->scsi_scan_wq,
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atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING,
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&unit->status) == 0);
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atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
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sdpnt->hostdata = NULL;
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unit->device = NULL;
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zfcp_erp_unit_failed(unit);
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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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* 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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if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
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zfcp_scsi_dbf_event_result("fail", 4,
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(struct zfcp_adapter*) scpnt->device->host->hostdata[0],
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scpnt, NULL);
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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, int use_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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zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
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goto out;
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}
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tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_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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static 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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* @use_timer: indicates whether timer should be setup or not
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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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int use_timer)
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{
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int ret;
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DECLARE_COMPLETION_ONSTACK(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,
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use_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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static 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;
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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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unit = (struct zfcp_unit *) scpnt->device->hostdata;
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return zfcp_scsi_command_async(adapter, unit, scpnt, 0);
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}
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static struct zfcp_unit *
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zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id,
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unsigned int lun)
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{
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struct zfcp_port *port;
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struct zfcp_unit *unit, *retval = NULL;
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list_for_each_entry(port, &adapter->port_list_head, list) {
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if (!port->rport || (id != port->rport->scsi_target_id))
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continue;
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list_for_each_entry(unit, &port->unit_list_head, list)
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if (lun == unit->scsi_lun) {
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retval = unit;
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goto out;
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}
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}
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out:
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return retval;
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}
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/**
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* zfcp_scsi_eh_abort_handler - abort the specified SCSI command
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* @scpnt: pointer to scsi_cmnd to be aborted
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* Return: SUCCESS - command has been aborted and cleaned up in internal
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* bookkeeping, SCSI stack won't be called for aborted command
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* FAILED - otherwise
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*
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* We do not need to care for a SCSI command which completes normally
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* but late during this abort routine runs. We are allowed to return
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* late commands to the SCSI stack. It tracks the state of commands and
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* will handle late commands. (Usually, the normal completion of late
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* commands is ignored with respect to the running abort operation.)
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*/
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static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
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{
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struct Scsi_Host *scsi_host;
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struct zfcp_adapter *adapter;
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struct zfcp_unit *unit;
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struct zfcp_fsf_req *fsf_req;
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unsigned long flags;
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unsigned long old_req_id;
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int retval = SUCCESS;
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scsi_host = scpnt->device->host;
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adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
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unit = (struct zfcp_unit *) scpnt->device->hostdata;
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ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
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scpnt, zfcp_get_busid_by_adapter(adapter));
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/* avoid race condition between late normal completion and abort */
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write_lock_irqsave(&adapter->abort_lock, flags);
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/* Check whether corresponding fsf_req is still pending */
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spin_lock(&adapter->req_list_lock);
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fsf_req = zfcp_reqlist_find(adapter,
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(unsigned long) scpnt->host_scribble);
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spin_unlock(&adapter->req_list_lock);
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if (!fsf_req) {
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
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retval = SUCCESS;
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goto out;
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}
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fsf_req->data = 0;
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fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
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old_req_id = fsf_req->req_id;
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/* don't access old fsf_req after releasing the abort_lock */
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write_unlock_irqrestore(&adapter->abort_lock, flags);
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fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0);
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if (!fsf_req) {
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ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n");
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zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
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old_req_id);
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retval = FAILED;
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goto out;
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}
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__wait_event(fsf_req->completion_wq,
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fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
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if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
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zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0);
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retval = SUCCESS;
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} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
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zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0);
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retval = SUCCESS;
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} else {
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zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0);
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retval = FAILED;
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}
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zfcp_fsf_req_free(fsf_req);
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out:
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return retval;
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}
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static int
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zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
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{
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int retval;
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struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
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if (!unit) {
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ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n");
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retval = SUCCESS;
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goto out;
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}
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ZFCP_LOG_NORMAL("resetting unit 0x%016Lx\n", unit->fcp_lun);
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/*
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* If we do not know whether the unit supports 'logical unit reset'
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* then try 'logical unit reset' and proceed with 'target reset'
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* if 'logical unit reset' fails.
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* 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,
|
|
scpnt);
|
|
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, scpnt);
|
|
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 scsi_cmnd *scpnt)
|
|
{
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
|
struct zfcp_fsf_req *fsf_req;
|
|
int retval = 0;
|
|
|
|
/* 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));
|
|
zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
__wait_event(fsf_req->completion_wq,
|
|
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
|
|
|
|
/*
|
|
* check completion status of task management function
|
|
*/
|
|
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
|
|
zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
|
|
retval = -EIO;
|
|
} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
|
|
zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
|
|
retval = -ENOTSUPP;
|
|
} else
|
|
zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
|
|
|
|
zfcp_fsf_req_free(fsf_req);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* zfcp_scsi_eh_host_reset_handler - handler for host and bus reset
|
|
*/
|
|
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
struct zfcp_adapter *adapter;
|
|
|
|
unit = (struct zfcp_unit*) scpnt->device->hostdata;
|
|
adapter = unit->port->adapter;
|
|
|
|
ZFCP_LOG_NORMAL("host/bus reset because of problems with "
|
|
"unit 0x%016Lx\n", unit->fcp_lun);
|
|
|
|
zfcp_erp_adapter_reopen(adapter, 0);
|
|
zfcp_erp_wait(adapter);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
int
|
|
zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
|
|
{
|
|
int retval = 0;
|
|
static unsigned int unique_id = 0;
|
|
|
|
if (adapter->scsi_host)
|
|
goto out;
|
|
|
|
/* 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_data.scsi_transport_template;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
void
|
|
zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct zfcp_port *port;
|
|
|
|
shost = adapter->scsi_host;
|
|
if (!shost)
|
|
return;
|
|
read_lock_irq(&zfcp_data.config_lock);
|
|
list_for_each_entry(port, &adapter->port_list_head, list)
|
|
if (port->rport)
|
|
port->rport = NULL;
|
|
read_unlock_irq(&zfcp_data.config_lock);
|
|
fc_remove_host(shost);
|
|
scsi_remove_host(shost);
|
|
scsi_host_put(shost);
|
|
adapter->scsi_host = NULL;
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Support functions for FC transport class
|
|
*/
|
|
static struct fc_host_statistics*
|
|
zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
|
|
{
|
|
struct fc_host_statistics *fc_stats;
|
|
|
|
if (!adapter->fc_stats) {
|
|
fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
|
|
if (!fc_stats)
|
|
return NULL;
|
|
adapter->fc_stats = fc_stats; /* freed in adater_dequeue */
|
|
}
|
|
memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
|
|
return adapter->fc_stats;
|
|
}
|
|
|
|
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)
|
|
{
|
|
fc_stats->seconds_since_last_reset = data->seconds_since_last_reset -
|
|
old->seconds_since_last_reset;
|
|
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;
|
|
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;
|
|
fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
|
|
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;
|
|
fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
|
|
fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
|
|
}
|
|
|
|
static void
|
|
zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
|
|
struct fsf_qtcb_bottom_port *data)
|
|
{
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc
|
|
*
|
|
* assumption: scsi_transport_fc synchronizes calls of
|
|
* get_fc_host_stats and reset_fc_host_stats
|
|
* (XXX to be checked otherwise introduce locking)
|
|
*/
|
|
static struct fc_host_statistics *
|
|
zfcp_get_fc_host_stats(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fc_host_statistics *fc_stats;
|
|
struct fsf_qtcb_bottom_port *data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
fc_stats = zfcp_init_fc_host_stats(adapter);
|
|
if (!fc_stats)
|
|
return NULL;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return NULL;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
|
|
if (ret) {
|
|
kfree(data);
|
|
return NULL; /* XXX return zeroed fc_stats? */
|
|
}
|
|
|
|
if (adapter->stats_reset &&
|
|
((jiffies/HZ - adapter->stats_reset) <
|
|
data->seconds_since_last_reset)) {
|
|
zfcp_adjust_fc_host_stats(fc_stats, data,
|
|
adapter->stats_reset_data);
|
|
} else
|
|
zfcp_set_fc_host_stats(fc_stats, data);
|
|
|
|
kfree(data);
|
|
return fc_stats;
|
|
}
|
|
|
|
static void
|
|
zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fsf_qtcb_bottom_port *data, *old_data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
|
|
if (ret) {
|
|
kfree(data);
|
|
} else {
|
|
adapter->stats_reset = jiffies/HZ;
|
|
old_data = adapter->stats_reset_data;
|
|
adapter->stats_reset_data = data; /* finally freed in
|
|
adater_dequeue */
|
|
kfree(old_data);
|
|
}
|
|
}
|
|
|
|
static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
|
|
{
|
|
rport->dev_loss_tmo = timeout;
|
|
}
|
|
|
|
struct fc_function_template zfcp_transport_functions = {
|
|
.show_starget_port_id = 1,
|
|
.show_starget_port_name = 1,
|
|
.show_starget_node_name = 1,
|
|
.show_rport_supported_classes = 1,
|
|
.show_rport_maxframe_size = 1,
|
|
.show_rport_dev_loss_tmo = 1,
|
|
.show_host_node_name = 1,
|
|
.show_host_port_name = 1,
|
|
.show_host_permanent_port_name = 1,
|
|
.show_host_supported_classes = 1,
|
|
.show_host_supported_speeds = 1,
|
|
.show_host_maxframe_size = 1,
|
|
.show_host_serial_number = 1,
|
|
.get_fc_host_stats = zfcp_get_fc_host_stats,
|
|
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
|
|
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
|
|
/* no functions registered for following dynamic attributes but
|
|
directly set by LLDD */
|
|
.show_host_port_type = 1,
|
|
.show_host_speed = 1,
|
|
.show_host_port_id = 1,
|
|
.disable_target_scan = 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) \
|
|
static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \
|
|
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
|