X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fs390%2Fscsi%2Fzfcp_scsi.c;h=b9daf5c058628720b82c03797ed323878d541a48;hb=ba1724202aafed4bbc4a239ac6fb433f454fddea;hp=fffd12399010dcead35c8802aa1e9948cc970c7a;hpb=059c97d0434834d291eff94669ca2dd3eaac9d28;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index fffd123..b9daf5c 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -1,39 +1,28 @@ -/* - * - * linux/drivers/s390/scsi/zfcp_scsi.c - * - * FCP adapter driver for IBM eServer zSeries - * - * (C) Copyright IBM Corp. 2002, 2004 +/* + * This file is part of the zfcp device driver for + * FCP adapters for IBM System z9 and zSeries. + * + * (C) Copyright IBM Corp. 2002, 2006 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. * - * Author(s): Martin Peschke - * Raimund Schroeder - * Aron Zeh - * Wolfgang Taphorn - * Stefan Bader - * Heiko Carstens - * Andreas Herrmann - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI -#define ZFCP_SCSI_REVISION "$Revision: 1.74 $" - #include "zfcp_ext.h" +#include static void zfcp_scsi_slave_destroy(struct scsi_device *sdp); static int zfcp_scsi_slave_alloc(struct scsi_device *sdp); @@ -42,48 +31,36 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *, void (*done) (struct scsi_cmnd *)); static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *); static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *); static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *); -static int zfcp_task_management_function(struct zfcp_unit *, u8); +static int zfcp_task_management_function(struct zfcp_unit *, u8, + struct scsi_cmnd *); -static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, scsi_id_t, - scsi_lun_t); -static struct zfcp_port *zfcp_port_lookup(struct zfcp_adapter *, int, - scsi_id_t); +static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, + unsigned int, unsigned int); static struct device_attribute *zfcp_sysfs_sdev_attrs[]; -struct scsi_transport_template *zfcp_transport_template; - struct zfcp_data zfcp_data = { .scsi_host_template = { - name: ZFCP_NAME, - proc_name: "zfcp", - proc_info: NULL, - detect: NULL, - slave_alloc: zfcp_scsi_slave_alloc, - slave_configure: zfcp_scsi_slave_configure, - slave_destroy: zfcp_scsi_slave_destroy, - queuecommand: zfcp_scsi_queuecommand, - eh_abort_handler: zfcp_scsi_eh_abort_handler, - eh_device_reset_handler: zfcp_scsi_eh_device_reset_handler, - eh_bus_reset_handler: zfcp_scsi_eh_bus_reset_handler, - eh_host_reset_handler: zfcp_scsi_eh_host_reset_handler, - /* FIXME(openfcp): Tune */ - can_queue: 4096, - this_id: 0, - /* - * FIXME: - * one less? can zfcp_create_sbale cope with it? - */ - sg_tablesize: ZFCP_MAX_SBALES_PER_REQ, - cmd_per_lun: 1, - unchecked_isa_dma: 0, - use_clustering: 1, - sdev_attrs: zfcp_sysfs_sdev_attrs, + .name = ZFCP_NAME, + .module = THIS_MODULE, + .proc_name = "zfcp", + .slave_alloc = zfcp_scsi_slave_alloc, + .slave_configure = zfcp_scsi_slave_configure, + .slave_destroy = zfcp_scsi_slave_destroy, + .queuecommand = zfcp_scsi_queuecommand, + .eh_abort_handler = zfcp_scsi_eh_abort_handler, + .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, + .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, + .can_queue = 4096, + .this_id = -1, + .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, + .cmd_per_lun = 1, + .use_clustering = 1, + .sdev_attrs = zfcp_sysfs_sdev_attrs, + .max_sectors = ZFCP_MAX_SECTORS, }, .driver_version = ZFCP_VERSION, - /* rest initialised with zeros */ }; /* Find start of Response Information in FCP response unit*/ @@ -113,7 +90,7 @@ zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) return fcp_sns_info_ptr; } -fcp_dl_t * +static fcp_dl_t * zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd) { int additional_length = fcp_cmd->add_fcp_cdb_length << 2; @@ -123,7 +100,7 @@ zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd) ((unsigned char *) fcp_cmd + sizeof (struct fcp_cmnd_iu) + additional_length); /* - * fcp_dl_addr = start address of fcp_cmnd structure + + * fcp_dl_addr = start address of fcp_cmnd structure + * size of fixed part + size of dynamically sized add_dcp_cdb field * SEE FCP-2 documentation */ @@ -147,38 +124,30 @@ zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) * regarding the specified byte */ static inline void -set_byte(u32 * result, char status, char pos) +set_byte(int *result, char status, char pos) { *result |= status << (pos * 8); } void -set_host_byte(u32 * result, char status) +set_host_byte(int *result, char status) { set_byte(result, status, 2); } void -set_driver_byte(u32 * result, char status) +set_driver_byte(int *result, char status) { set_byte(result, status, 3); } -/* - * function: zfcp_scsi_slave_alloc - * - * purpose: - * - * returns: - */ - static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) { struct zfcp_adapter *adapter; struct zfcp_unit *unit; unsigned long flags; - int retval = -ENODEV; + int retval = -ENXIO; adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; if (!adapter) @@ -186,7 +155,8 @@ zfcp_scsi_slave_alloc(struct scsi_device *sdp) read_lock_irqsave(&zfcp_data.config_lock, flags); unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); - if (unit) { + if (unit && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED, + &unit->status)) { sdp->hostdata = unit; unit->device = sdp; zfcp_unit_get(unit); @@ -197,30 +167,30 @@ zfcp_scsi_slave_alloc(struct scsi_device *sdp) return retval; } -/* - * function: zfcp_scsi_slave_destroy - * - * purpose: +/** + * zfcp_scsi_slave_destroy - called when scsi device is removed * - * returns: + * Remove reference to associated scsi device for an zfcp_unit. + * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs + * or a scan for this device might have failed. */ - -static void -zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) +static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) { struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; if (unit) { + zfcp_erp_wait(unit->port->adapter); + atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); sdpnt->hostdata = NULL; unit->device = NULL; + zfcp_erp_unit_failed(unit); zfcp_unit_put(unit); - } else { + } else ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at " "address %p\n", sdpnt); - } } -/* +/* * called from scsi midlayer to allow finetuning of a device. */ static int @@ -242,7 +212,10 @@ static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) { set_host_byte(&scpnt->result, result); - zfcp_cmd_dbf_event_scsi("failing", scpnt); + if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) + zfcp_scsi_dbf_event_result("fail", 4, + (struct zfcp_adapter*) scpnt->device->host->hostdata[0], + scpnt, NULL); /* return directly */ scpnt->scsi_done(scpnt); } @@ -259,7 +232,7 @@ zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) */ int zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, - struct scsi_cmnd *scpnt, struct timer_list *timer) + struct scsi_cmnd *scpnt, int use_timer) { int tmp; int retval; @@ -285,19 +258,17 @@ zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, goto out; } - if (unlikely( - !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))) { + tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, + ZFCP_REQ_AUTO_CLEANUP); + if (unlikely(tmp == -EBUSY)) { ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx " "on port 0x%016Lx in recovery\n", zfcp_get_busid_by_unit(unit), unit->fcp_lun, unit->port->wwpn); - retval = SCSI_MLQUEUE_DEVICE_BUSY; + zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); goto out; } - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, timer, - ZFCP_REQ_AUTO_CLEANUP); - if (unlikely(tmp < 0)) { ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n"); retval = SCSI_MLQUEUE_HOST_BUSY; @@ -307,7 +278,7 @@ out: return retval; } -void +static void zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) { struct completion *wait = (struct completion *) scpnt->SCp.ptr; @@ -319,21 +290,22 @@ zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) * zfcp_scsi_command_sync - send a SCSI command and wait for completion * @unit: unit where command is sent to * @scpnt: scsi command to be sent - * @timer: timer to be started if request is successfully initiated + * @use_timer: indicates whether timer should be setup or not * Return: 0 * * Errors are indicated in scpnt->result */ int zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt, - struct timer_list *timer) + int use_timer) { int ret; - DECLARE_COMPLETION(wait); + DECLARE_COMPLETION_ONSTACK(wait); scpnt->SCp.ptr = (void *) &wait; /* silent re-use */ scpnt->scsi_done = zfcp_scsi_command_sync_handler; - ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, timer); + ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, + use_timer); if (ret == 0) wait_for_completion(&wait); @@ -350,7 +322,7 @@ zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt, * returns: 0 - success, SCSI command enqueued * !0 - failure */ -int +static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, void (*done) (struct scsi_cmnd *)) { @@ -369,21 +341,12 @@ zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, 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); + return zfcp_scsi_command_async(adapter, unit, scpnt, 0); } -/* - * 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) +zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id, + unsigned int lun) { struct zfcp_port *port; struct zfcp_unit *unit, *retval = NULL; @@ -391,32 +354,19 @@ zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id, list_for_each_entry(port, &adapter->port_list_head, list) { if (!port->rport || (id != port->rport->scsi_target_id)) continue; - list_for_each_entry(unit, &port->unit_list_head, list) { + 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 (port->rport && (id == port->rport->scsi_target_id)) - return port; - } - return (struct zfcp_port *) NULL; -} - /** * zfcp_scsi_eh_abort_handler - abort the specified SCSI command - * @scpnt: pointer to scsi_cmnd to be aborted + * @scpnt: pointer to scsi_cmnd to be aborted * Return: SUCCESS - command has been aborted and cleaned up in internal * bookkeeping, SCSI stack won't be called for aborted command * FAILED - otherwise @@ -427,15 +377,15 @@ zfcp_port_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id) * will handle late commands. (Usually, the normal completion of late * commands is ignored with respect to the running abort operation.) */ -int -zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) +static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) { struct Scsi_Host *scsi_host; struct zfcp_adapter *adapter; struct zfcp_unit *unit; - int retval = SUCCESS; - struct zfcp_fsf_req *new_fsf_req, *old_fsf_req; + struct zfcp_fsf_req *fsf_req; unsigned long flags; + unsigned long old_req_id; + int retval = SUCCESS; scsi_host = scpnt->device->host; adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; @@ -447,63 +397,52 @@ zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) /* avoid race condition between late normal completion and abort */ 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.) - */ - old_fsf_req = (struct zfcp_fsf_req *) scpnt->host_scribble; - if (!old_fsf_req) { + /* Check whether corresponding fsf_req is still pending */ + spin_lock(&adapter->req_list_lock); + fsf_req = zfcp_reqlist_find(adapter, + (unsigned long) scpnt->host_scribble); + spin_unlock(&adapter->req_list_lock); + if (!fsf_req) { write_unlock_irqrestore(&adapter->abort_lock, flags); - ZFCP_LOG_NORMAL("bug: no old fsf request found\n"); - ZFCP_LOG_NORMAL("scsi_cmnd:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, - (char *) scpnt, sizeof (struct scsi_cmnd)); - retval = FAILED; + zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); + retval = SUCCESS; goto out; } - old_fsf_req->data = 0; - old_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; + fsf_req->data = 0; + fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; + old_req_id = fsf_req->req_id; - /* don't access old_fsf_req after releasing the abort_lock */ + /* don't access old fsf_req after releasing the abort_lock */ 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); - if (!new_fsf_req) { + + fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); + if (!fsf_req) { + ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n"); + zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, + old_req_id); retval = FAILED; - ZFCP_LOG_NORMAL("error: initiation of Abort FCP Cmnd " - "failed\n"); goto out; } - /* wait for completion of abort */ - __wait_event(new_fsf_req->completion_wq, - new_fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - zfcp_fsf_req_free(new_fsf_req); + __wait_event(fsf_req->completion_wq, + fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - /* status should be valid since signals were not permitted */ - if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { + if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { + zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); retval = SUCCESS; - } else if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { + } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { + zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); retval = SUCCESS; } else { + zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); retval = FAILED; } + zfcp_fsf_req_free(fsf_req); out: return retval; } -/* - * function: zfcp_scsi_eh_device_reset_handler - * - * purpose: - * - * returns: - */ -int +static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) { int retval; @@ -514,7 +453,9 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) retval = SUCCESS; goto out; } - ZFCP_LOG_NORMAL("resetting unit 0x%016Lx\n", unit->fcp_lun); + ZFCP_LOG_NORMAL("resetting unit 0x%016Lx on port 0x%016Lx, adapter %s\n", + unit->fcp_lun, unit->port->wwpn, + zfcp_get_busid_by_adapter(unit->port->adapter)); /* * If we do not know whether the unit supports 'logical unit reset' @@ -525,8 +466,9 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) */ if (!atomic_test_mask(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET, &unit->status)) { - retval = - zfcp_task_management_function(unit, FCP_LOGICAL_UNIT_RESET); + 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) @@ -542,7 +484,7 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) goto out; } } - retval = zfcp_task_management_function(unit, FCP_TARGET_RESET); + retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt); if (retval) { ZFCP_LOG_DEBUG("target reset failed (unit=%p)\n", unit); retval = FAILED; @@ -555,12 +497,12 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) } static int -zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags) +zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, + struct scsi_cmnd *scpnt) { struct zfcp_adapter *adapter = unit->port->adapter; - int retval; - int status; struct zfcp_fsf_req *fsf_req; + int retval = 0; /* issue task management function */ fsf_req = zfcp_fsf_send_fcp_command_task_management @@ -570,85 +512,62 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags) "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; } - retval = zfcp_fsf_req_wait_and_cleanup(fsf_req, - ZFCP_UNINTERRUPTIBLE, &status); + __wait_event(fsf_req->completion_wq, + fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + /* * check completion status of task management function - * (status should always be valid since no signals permitted) */ - if (status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) + if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { + zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); retval = -EIO; - else if (status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) + } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { + zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); retval = -ENOTSUPP; - else - retval = 0; + } else + zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); + + zfcp_fsf_req_free(fsf_req); out: return retval; } -/* - * function: zfcp_scsi_eh_bus_reset_handler - * - * purpose: - * - * returns: +/** + * zfcp_scsi_eh_host_reset_handler - handler for host reset */ -int -zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt) +static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { - int retval = 0; struct zfcp_unit *unit; + struct zfcp_adapter *adapter; - 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; + unit = (struct zfcp_unit*) scpnt->device->hostdata; + adapter = unit->port->adapter; - 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; + "unit 0x%016Lx on port 0x%016Lx, adapter %s\n", + unit->fcp_lun, unit->port->wwpn, + zfcp_get_busid_by_adapter(unit->port->adapter)); - return retval; + zfcp_erp_adapter_reopen(adapter, 0); + zfcp_erp_wait(adapter); + + return SUCCESS; } -/* - * function: - * - * purpose: - * - * returns: - */ 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 *)); @@ -667,11 +586,7 @@ zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) 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; + adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; /* * save a pointer to our own adapter data structure within @@ -689,119 +604,201 @@ zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) return retval; } -/* - * function: - * - * purpose: - * - * returns: - */ 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; - 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) +static struct fc_host_statistics* +zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) { - 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; + struct fc_host_statistics *fc_stats; - 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); + 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_get_port_name(struct scsi_target *starget) +zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data, + struct fsf_qtcb_bottom_port *old) { - 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); + 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_get_node_name(struct scsi_target *starget) +zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, + struct fsf_qtcb_bottom_port *data) { - 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; + 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; +} - 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); +/** + * 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; } -void -zfcp_set_fc_host_attrs(struct zfcp_adapter *adapter) +static void +zfcp_reset_fc_host_stats(struct Scsi_Host *shost) { - struct Scsi_Host *shost = adapter->scsi_host; + struct zfcp_adapter *adapter; + struct fsf_qtcb_bottom_port *data, *old_data; + int ret; - fc_host_node_name(shost) = adapter->wwnn; - fc_host_port_name(shost) = adapter->wwpn; - strncpy(fc_host_serial_number(shost), adapter->serial_number, - min(FC_SERIAL_NUMBER_SIZE, 32)); - fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; + 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 = { - .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, .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, }; /**