diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_scsi.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_scsi.c | 1396 |
1 files changed, 589 insertions, 807 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index b61d309352c..7b353647cb9 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -1,951 +1,733 @@ -/* - * - * linux/drivers/s390/scsi/zfcp_scsi.c - * - * FCP adapter driver for IBM eServer zSeries - * - * (C) Copyright IBM Corp. 2002, 2004 +/* + * zfcp device driver + * + * Interface to Linux SCSI midlayer. * - * Author(s): Martin Peschke <mpeschke@de.ibm.com> - * Raimund Schroeder <raimund.schroeder@de.ibm.com> - * Aron Zeh - * Wolfgang Taphorn - * Stefan Bader <stefan.bader@de.ibm.com> - * Heiko Carstens <heiko.carstens@de.ibm.com> - * Andreas Herrmann <aherrman@de.ibm.com> - * - * 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. + * Copyright IBM Corp. 2002, 2013 */ -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI - -#define ZFCP_SCSI_REVISION "$Revision: 1.74 $" +#define KMSG_COMPONENT "zfcp" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <scsi/fc/fc_fcp.h> +#include <scsi/scsi_eh.h> +#include <linux/atomic.h> #include "zfcp_ext.h" +#include "zfcp_dbf.h" +#include "zfcp_fc.h" +#include "zfcp_reqlist.h" -static void zfcp_scsi_slave_destroy(struct scsi_device *sdp); -static int zfcp_scsi_slave_alloc(struct scsi_device *sdp); -static int zfcp_scsi_slave_configure(struct scsi_device *sdp); -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 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 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, - }, - .driver_version = ZFCP_VERSION, - /* rest initialised with zeros */ -}; +static unsigned int default_depth = 32; +module_param_named(queue_depth, default_depth, uint, 0600); +MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); -/* Find start of Response Information in FCP response unit*/ -char * -zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) -{ - char *fcp_rsp_info_ptr; +static bool enable_dif; +module_param_named(dif, enable_dif, bool, 0400); +MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); - fcp_rsp_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); +static bool allow_lun_scan = 1; +module_param(allow_lun_scan, bool, 0600); +MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); - return fcp_rsp_info_ptr; +static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, + int reason) +{ + switch (reason) { + case SCSI_QDEPTH_DEFAULT: + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + break; + case SCSI_QDEPTH_QFULL: + scsi_track_queue_full(sdev, depth); + break; + case SCSI_QDEPTH_RAMP_UP: + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + break; + default: + return -EOPNOTSUPP; + } + return sdev->queue_depth; } -/* Find start of Sense Information in FCP response unit*/ -char * -zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) +static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) { - char *fcp_sns_info_ptr; + struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); - fcp_sns_info_ptr = - (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu)); - if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) - fcp_sns_info_ptr = (char *) fcp_sns_info_ptr + - fcp_rsp_iu->fcp_rsp_len; + /* if previous slave_alloc returned early, there is nothing to do */ + if (!zfcp_sdev->port) + return; - return fcp_sns_info_ptr; + zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); + put_device(&zfcp_sdev->port->dev); } -fcp_dl_t * -zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd) +static int zfcp_scsi_slave_configure(struct scsi_device *sdp) { - int additional_length = fcp_cmd->add_fcp_cdb_length << 2; - fcp_dl_t *fcp_dl_addr; - - fcp_dl_addr = (fcp_dl_t *) - ((unsigned char *) fcp_cmd + - sizeof (struct fcp_cmnd_iu) + additional_length); - /* - * 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 - */ - return fcp_dl_addr; + if (sdp->tagged_supported) + scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); + else + scsi_adjust_queue_depth(sdp, 0, 1); + return 0; } -fcp_dl_t -zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd) +static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) { - return *zfcp_get_fcp_dl_ptr(fcp_cmd); + set_host_byte(scpnt, result); + zfcp_dbf_scsi_fail_send(scpnt); + scpnt->scsi_done(scpnt); } -void -zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) +static +int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) { - *zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl; -} + struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); + struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); + int status, scsi_result, ret; -/* - * note: it's a bit-or operation not an assignment - * regarding the specified byte - */ -static inline void -set_byte(u32 * result, char status, char pos) -{ - *result |= status << (pos * 8); -} + /* reset the status for this request */ + scpnt->result = 0; + scpnt->host_scribble = NULL; -void -set_host_byte(u32 * result, char status) -{ - set_byte(result, status, 2); -} + scsi_result = fc_remote_port_chkready(rport); + if (unlikely(scsi_result)) { + scpnt->result = scsi_result; + zfcp_dbf_scsi_fail_send(scpnt); + scpnt->scsi_done(scpnt); + return 0; + } -void -set_driver_byte(u32 * result, char status) -{ - set_byte(result, status, 3); -} + status = atomic_read(&zfcp_sdev->status); + if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && + !(atomic_read(&zfcp_sdev->port->status) & + ZFCP_STATUS_COMMON_ERP_FAILED)) { + /* only LUN access denied, but port is good + * not covered by FC transport, have to fail here */ + zfcp_scsi_command_fail(scpnt, DID_ERROR); + return 0; + } -/* - * function: zfcp_scsi_slave_alloc - * - * purpose: - * - * returns: - */ + if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { + /* This could be either + * open LUN pending: this is temporary, will result in + * open LUN or ERP_FAILED, so retry command + * call to rport_delete pending: mimic retry from + * fc_remote_port_chkready until rport is BLOCKED + */ + zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); + return 0; + } + + ret = zfcp_fsf_fcp_cmnd(scpnt); + if (unlikely(ret == -EBUSY)) + return SCSI_MLQUEUE_DEVICE_BUSY; + else if (unlikely(ret < 0)) + return SCSI_MLQUEUE_HOST_BUSY; -static int -zfcp_scsi_slave_alloc(struct scsi_device *sdp) + return ret; +} + +static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) { - struct zfcp_adapter *adapter; + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct zfcp_adapter *adapter = + (struct zfcp_adapter *) sdev->host->hostdata[0]; + struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); + struct zfcp_port *port; struct zfcp_unit *unit; - unsigned long flags; - int retval = -ENODEV; - - adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; - if (!adapter) - goto out; - - read_lock_irqsave(&zfcp_data.config_lock, flags); - unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); - if (unit) { - sdp->hostdata = unit; - unit->device = sdp; - zfcp_unit_get(unit); - retval = 0; - } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - out: - return retval; -} + int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; -/* - * function: zfcp_scsi_slave_destroy - * - * purpose: - * - * returns: - */ + port = zfcp_get_port_by_wwpn(adapter, rport->port_name); + if (!port) + return -ENXIO; -static void -zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) -{ - struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; - - if (unit) { - sdpnt->hostdata = NULL; - unit->device = NULL; - zfcp_unit_put(unit); - } else { - ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at " - "address %p\n", sdpnt); + unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); + if (unit) + put_device(&unit->dev); + + if (!unit && !(allow_lun_scan && npiv)) { + put_device(&port->dev); + return -ENXIO; } -} -/* - * called from scsi midlayer to allow finetuning of a device. - */ -static int -zfcp_scsi_slave_configure(struct scsi_device *sdp) -{ - if (sdp->tagged_supported) - scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN); - else - scsi_adjust_queue_depth(sdp, 0, 1); + zfcp_sdev->port = port; + zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; + zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; + zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; + zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; + zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; + zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; + spin_lock_init(&zfcp_sdev->latencies.lock); + + zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); + zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); + zfcp_erp_wait(port->adapter); + return 0; } -/** - * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function - * @scpnt: pointer to struct scsi_cmnd where result is set - * @result: result to be set in scpnt (e.g. DID_ERROR) - */ -static void -zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) +static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) { - set_host_byte(&scpnt->result, result); - zfcp_cmd_dbf_event_scsi("failing", scpnt); - /* return directly */ - scpnt->scsi_done(scpnt); -} + struct Scsi_Host *scsi_host = scpnt->device->host; + struct zfcp_adapter *adapter = + (struct zfcp_adapter *) scsi_host->hostdata[0]; + struct zfcp_fsf_req *old_req, *abrt_req; + unsigned long flags; + unsigned long old_reqid = (unsigned long) scpnt->host_scribble; + int retval = SUCCESS, ret; + int retry = 3; + char *dbf_tag; -/** - * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and - * zfcp_scsi_command_sync - * @adapter: adapter where scsi command is issued - * @unit: unit to which scsi command is sent - * @scpnt: scsi command to be sent - * @timer: timer to be started if request is successfully initiated - * - * Note: In scsi_done function must be set in scpnt. - */ -int -zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, - struct scsi_cmnd *scpnt, struct timer_list *timer) -{ - int tmp; - int retval; + /* avoid race condition between late normal completion and abort */ + write_lock_irqsave(&adapter->abort_lock, flags); - retval = 0; + old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); + if (!old_req) { + write_unlock_irqrestore(&adapter->abort_lock, flags); + zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); + return FAILED; /* completion could be in progress */ + } + old_req->data = NULL; - BUG_ON((adapter == NULL) || (adapter != unit->port->adapter)); - BUG_ON(scpnt->scsi_done == NULL); + /* don't access old fsf_req after releasing the abort_lock */ + write_unlock_irqrestore(&adapter->abort_lock, flags); - if (unlikely(NULL == unit)) { - zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); - goto out; + while (retry--) { + abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); + if (abrt_req) + break; + + zfcp_erp_wait(adapter); + ret = fc_block_scsi_eh(scpnt); + if (ret) { + zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); + return ret; + } + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_RUNNING)) { + zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); + return SUCCESS; + } + } + if (!abrt_req) { + zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); + return FAILED; } - if (unlikely( - atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) || - !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) { - ZFCP_LOG_DEBUG("stopping SCSI I/O on 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_command_fail(scpnt, DID_ERROR); - goto out; + wait_for_completion(&abrt_req->completion); + + if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) + dbf_tag = "abrt_ok"; + else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) + dbf_tag = "abrt_nn"; + else { + dbf_tag = "abrt_fa"; + retval = FAILED; } + zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); + zfcp_fsf_req_free(abrt_req); + return retval; +} - if (unlikely( - !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))) { - 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; - goto out; +static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) +{ + struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); + struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; + struct zfcp_fsf_req *fsf_req = NULL; + int retval = SUCCESS, ret; + int retry = 3; + + while (retry--) { + fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); + if (fsf_req) + break; + + zfcp_erp_wait(adapter); + ret = fc_block_scsi_eh(scpnt); + if (ret) + return ret; + + if (!(atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_RUNNING)) { + zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); + return SUCCESS; + } } + if (!fsf_req) + return FAILED; - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, timer, - ZFCP_REQ_AUTO_CLEANUP); + wait_for_completion(&fsf_req->completion); - if (unlikely(tmp < 0)) { - ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n"); - retval = SCSI_MLQUEUE_HOST_BUSY; - } + if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { + zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); + retval = FAILED; + } else + zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); -out: + zfcp_fsf_req_free(fsf_req); return retval; } -void -zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) +static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) { - struct completion *wait = (struct completion *) scpnt->SCp.ptr; - complete(wait); + return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); } +static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) +{ + return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); +} -/** - * 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 - * 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) +static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { + struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); + struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; int ret; - DECLARE_COMPLETION(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); - if (ret == 0) - wait_for_completion(&wait); + zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); + zfcp_erp_wait(adapter); + ret = fc_block_scsi_eh(scpnt); + if (ret) + return ret; - scpnt->SCp.ptr = NULL; - - return 0; + return SUCCESS; } -/* - * function: zfcp_scsi_queuecommand - * - * purpose: enqueues a SCSI command to the specified target device - * - * returns: 0 - success, SCSI command enqueued - * !0 - failure +struct scsi_transport_template *zfcp_scsi_transport_template; + +static struct scsi_host_template zfcp_scsi_host_template = { + .module = THIS_MODULE, + .name = "zfcp", + .queuecommand = zfcp_scsi_queuecommand, + .eh_abort_handler = zfcp_scsi_eh_abort_handler, + .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, + .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, + .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, + .slave_alloc = zfcp_scsi_slave_alloc, + .slave_configure = zfcp_scsi_slave_configure, + .slave_destroy = zfcp_scsi_slave_destroy, + .change_queue_depth = zfcp_scsi_change_queue_depth, + .proc_name = "zfcp", + .can_queue = 4096, + .this_id = -1, + .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) + * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), + /* GCD, adjusted later */ + .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) + * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, + /* GCD, adjusted later */ + .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, + .cmd_per_lun = 1, + .use_clustering = 1, + .shost_attrs = zfcp_sysfs_shost_attrs, + .sdev_attrs = zfcp_sysfs_sdev_attrs, +}; + +/** + * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer + * @adapter: The zfcp adapter to register with the SCSI midlayer */ -int -zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, - void (*done) (struct scsi_cmnd *)) +int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) { - struct zfcp_unit *unit; - struct zfcp_adapter *adapter; + struct ccw_dev_id dev_id; - /* reset the status for this request */ - scpnt->result = 0; - scpnt->host_scribble = NULL; - scpnt->scsi_done = done; + if (adapter->scsi_host) + return 0; - /* - * 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; + ccw_device_get_id(adapter->ccw_device, &dev_id); + /* register adapter as SCSI host with mid layer of SCSI stack */ + adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, + sizeof (struct zfcp_adapter *)); + if (!adapter->scsi_host) { + dev_err(&adapter->ccw_device->dev, + "Registering the FCP device with the " + "SCSI stack failed\n"); + return -EIO; + } - return zfcp_scsi_command_async(adapter, unit, scpnt, NULL); + /* tell the SCSI stack some characteristics of this adapter */ + adapter->scsi_host->max_id = 511; + adapter->scsi_host->max_lun = 0xFFFFFFFF; + adapter->scsi_host->max_channel = 0; + adapter->scsi_host->unique_id = dev_id.devno; + adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ + adapter->scsi_host->transportt = zfcp_scsi_transport_template; + + 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); + return -EIO; + } + + return 0; } -/* - * function: zfcp_unit_lookup - * - * purpose: - * - * returns: - * - * context: +/** + * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer + * @adapter: The zfcp adapter to unregister. */ -static struct zfcp_unit * -zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id, - scsi_lun_t lun) +void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) { + struct Scsi_Host *shost; 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; + + shost = adapter->scsi_host; + if (!shost) + return; + + read_lock_irq(&adapter->port_list_lock); + list_for_each_entry(port, &adapter->port_list, list) + port->rport = NULL; + read_unlock_irq(&adapter->port_list_lock); + + fc_remove_host(shost); + scsi_remove_host(shost); + scsi_host_put(shost); + adapter->scsi_host = NULL; } -static struct zfcp_port * -zfcp_port_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id) +static struct fc_host_statistics* +zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) { - struct zfcp_port *port; + struct fc_host_statistics *fc_stats; - list_for_each_entry(port, &adapter->port_list_head, list) { - if (id == port->scsi_id) - return port; + if (!adapter->fc_stats) { + fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); + if (!fc_stats) + return NULL; + adapter->fc_stats = fc_stats; /* freed in adapter_release */ } - return (struct zfcp_port *) NULL; + memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); + return adapter->fc_stats; } -/* - * 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 -__zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) +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) { - 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); + 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; +} - /* - * 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; - } +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; +} - /* Figure out which fsf_req needs to be aborted. */ - old_fsf_req = req_data->send_fcp_command_task.fsf_req; +static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) +{ + struct zfcp_adapter *adapter; + struct fc_host_statistics *fc_stats; + struct fsf_qtcb_bottom_port *data; + int ret; - dbf_fsf_req = (unsigned long) old_fsf_req; - dbf_timeout = - (jiffies - req_data->send_fcp_command_task.start_jiffies) / HZ; + adapter = (struct zfcp_adapter *)host->hostdata[0]; + fc_stats = zfcp_init_fc_host_stats(adapter); + if (!fc_stats) + return NULL; - 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; - } + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return NULL; - /* 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]; - zfcp_fsf_req_free(new_fsf_req); -#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); + ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); + if (ret) { + kfree(data); + return NULL; } - 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; -} + 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); -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; + kfree(data); + return fc_stats; } -/* - * function: zfcp_scsi_eh_device_reset_handler - * - * purpose: - * - * returns: - */ -int -zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) +static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) { - int retval; - struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata; - struct Scsi_Host *scsi_host = scpnt->device->host; + struct zfcp_adapter *adapter; + struct fsf_qtcb_bottom_port *data; + int ret; - 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; + adapter = (struct zfcp_adapter *)shost->hostdata[0]; + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return; + + ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); + if (ret) + kfree(data); + else { + adapter->stats_reset = jiffies/HZ; + kfree(adapter->stats_reset_data); + adapter->stats_reset_data = data; /* finally freed in + adapter_release */ } - out: - return retval; } -static int -zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags) +static void zfcp_get_host_port_state(struct Scsi_Host *shost) { - 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; + struct zfcp_adapter *adapter = + (struct zfcp_adapter *)shost->hostdata[0]; + int status = atomic_read(&adapter->status); + + if ((status & ZFCP_STATUS_COMMON_RUNNING) && + !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) + fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; + else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) + fc_host_port_state(shost) = FC_PORTSTATE_ERROR; else - retval = 0; - out: - return retval; + fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; } -/* - * function: zfcp_scsi_eh_bus_reset_handler - * - * purpose: +static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) +{ + rport->dev_loss_tmo = timeout; +} + +/** + * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport + * @rport: The FC rport where to teminate I/O * - * returns: + * Abort all pending SCSI commands for a port by closing the + * port. Using a reopen avoids a conflict with a shutdown + * overwriting a reopen. The "forced" ensures that a disappeared port + * is not opened again as valid due to the cached plogi data in + * non-NPIV mode. */ -int -zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt) +static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) { - int retval = 0; - struct zfcp_unit *unit; - struct Scsi_Host *scsi_host = scpnt->device->host; + struct zfcp_port *port; + struct Scsi_Host *shost = rport_to_shost(rport); + struct zfcp_adapter *adapter = + (struct zfcp_adapter *)shost->hostdata[0]; - 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; + port = zfcp_get_port_by_wwpn(adapter, rport->port_name); - return retval; + if (port) { + zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); + put_device(&port->dev); + } } -/* - * function: zfcp_scsi_eh_host_reset_handler - * - * purpose: - * - * returns: - */ -int -zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) +static void zfcp_scsi_rport_register(struct zfcp_port *port) { - int retval = 0; - struct zfcp_unit *unit; - struct Scsi_Host *scsi_host = scpnt->device->host; + struct fc_rport_identifiers ids; + struct fc_rport *rport; - 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; + if (port->rport) + return; - return retval; + ids.node_name = port->wwnn; + ids.port_name = port->wwpn; + ids.port_id = port->d_id; + ids.roles = FC_RPORT_ROLE_FCP_TARGET; + + rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); + if (!rport) { + dev_err(&port->adapter->ccw_device->dev, + "Registering port 0x%016Lx failed\n", + (unsigned long long)port->wwpn); + return; + } + + rport->maxframe_size = port->maxframe_size; + rport->supported_classes = port->supported_classes; + port->rport = rport; + port->starget_id = rport->scsi_target_id; + + zfcp_unit_queue_scsi_scan(port); } -/* - * function: - * - * purpose: - * - * returns: - */ -int -zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) +static void zfcp_scsi_rport_block(struct zfcp_port *port) { - int retval = 0; - static unsigned int unique_id = 0; + struct fc_rport *rport = port->rport; - /* 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; + if (rport) { + fc_remote_port_delete(rport); + port->rport = NULL; } - 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; +void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) +{ + get_device(&port->dev); + port->rport_task = RPORT_ADD; - 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; + if (!queue_work(port->adapter->work_queue, &port->rport_work)) + put_device(&port->dev); } -/* - * function: - * - * purpose: - * - * returns: - */ -void -zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) +void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) { - struct Scsi_Host *shost; + get_device(&port->dev); + port->rport_task = RPORT_DEL; - shost = adapter->scsi_host; - if (!shost) + if (port->rport && queue_work(port->adapter->work_queue, + &port->rport_work)) 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; + put_device(&port->dev); } - -void -zfcp_fsf_start_scsi_er_timer(struct zfcp_adapter *adapter) +void zfcp_scsi_schedule_rports_block(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); + unsigned long flags; + struct zfcp_port *port; + + read_lock_irqsave(&adapter->port_list_lock, flags); + list_for_each_entry(port, &adapter->port_list, list) + zfcp_scsi_schedule_rport_block(port); + read_unlock_irqrestore(&adapter->port_list_lock, flags); } -/* - * Support functions for FC transport class - */ -static void -zfcp_get_port_id(struct scsi_target *starget) +void zfcp_scsi_rport_work(struct work_struct *work) { - 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 zfcp_port *port = container_of(work, struct zfcp_port, + rport_work); - 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); + while (port->rport_task) { + if (port->rport_task == RPORT_ADD) { + port->rport_task = RPORT_NONE; + zfcp_scsi_rport_register(port); + } else { + port->rport_task = RPORT_NONE; + zfcp_scsi_rport_block(port); + } + } + + put_device(&port->dev); } -static void -zfcp_get_port_name(struct scsi_target *starget) +/** + * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host + * @adapter: The adapter where to configure DIF/DIX for the SCSI host + */ +void zfcp_scsi_set_prot(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; + unsigned int mask = 0; + unsigned int data_div; + struct Scsi_Host *shost = adapter->scsi_host; + + data_div = atomic_read(&adapter->status) & + ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; + + if (enable_dif && + adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) + mask |= SHOST_DIF_TYPE1_PROTECTION; + + if (enable_dif && data_div && + adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { + mask |= SHOST_DIX_TYPE1_PROTECTION; + scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); + shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; + shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; + shost->max_sectors = shost->sg_tablesize * 8; + } - 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); + scsi_host_set_prot(shost, mask); } -static void -zfcp_get_node_name(struct scsi_target *starget) +/** + * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error + * @scmd: The SCSI command to report the error for + * @ascq: The ASCQ to put in the sense buffer + * + * See the error handling in sd_done for the sense codes used here. + * Set DID_SOFT_ERROR to retry the request, if possible. + */ +void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) { - 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); + scsi_build_sense_buffer(1, scmd->sense_buffer, + ILLEGAL_REQUEST, 0x10, ascq); + set_driver_byte(scmd, DRIVER_SENSE); + scmd->result |= SAM_STAT_CHECK_CONDITION; + set_host_byte(scmd, DID_SOFT_ERROR); } 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_fc4s = 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, + .get_host_port_state = zfcp_get_host_port_state, + .terminate_rport_io = zfcp_scsi_terminate_rport_io, + .show_host_port_state = 1, + .show_host_active_fc4s = 1, + .bsg_request = zfcp_fc_exec_bsg_job, + .bsg_timeout = zfcp_fc_timeout_bsg_job, + /* no functions registered for following dynamic attributes but + directly set by LLDD */ + .show_host_port_type = 1, + .show_host_symbolic_name = 1, + .show_host_speed = 1, + .show_host_port_id = 1, + .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), }; - -/** - * 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 |