/*
- * This file is part of the zfcp device driver for
- * FCP adapters for IBM System z9 and zSeries.
+ * zfcp device driver
*
- * (C) Copyright IBM Corp. 2002, 2006
+ * Interface to Linux SCSI midlayer.
*
- * 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 Corporation 2002, 2009
*/
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-#include "zfcp_ext.h"
#include <asm/atomic.h>
+#include "zfcp_ext.h"
+#include "zfcp_dbf.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_target_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,
- struct scsi_cmnd *);
-
-static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int,
- unsigned int, unsigned int);
-
-static struct device_attribute *zfcp_sysfs_sdev_attrs[];
-
-struct zfcp_data zfcp_data = {
- .scsi_host_template = {
- .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_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
- .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
- .can_queue = 4096,
- .this_id = -1,
- .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
- .cmd_per_lun = 1,
- .use_clustering = 1,
- .sdev_attrs = zfcp_sysfs_sdev_attrs,
- .max_sectors = ZFCP_MAX_SECTORS,
- },
- .driver_version = ZFCP_VERSION,
-};
-
-/* 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;
-
- fcp_rsp_info_ptr =
- (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
-
- return fcp_rsp_info_ptr;
-}
+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 Sense Information in FCP response unit*/
-char *
-zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
+char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
{
char *fcp_sns_info_ptr;
- fcp_sns_info_ptr =
- (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
+ fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1];
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;
+ fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len;
return fcp_sns_info_ptr;
}
-static fcp_dl_t *
-zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd)
+static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth)
{
- 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;
-}
-
-fcp_dl_t
-zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd)
-{
- return *zfcp_get_fcp_dl_ptr(fcp_cmd);
-}
-
-void
-zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
-{
- *zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl;
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ return sdev->queue_depth;
}
-/*
- * note: it's a bit-or operation not an assignment
- * regarding the specified byte
- */
-static inline void
-set_byte(int *result, char status, char pos)
-{
- *result |= status << (pos * 8);
-}
-
-void
-set_host_byte(int *result, char status)
-{
- set_byte(result, status, 2);
-}
-
-void
-set_driver_byte(int *result, char status)
-{
- set_byte(result, status, 3);
-}
-
-static int
-zfcp_scsi_slave_alloc(struct scsi_device *sdp)
-{
- struct zfcp_adapter *adapter;
- struct zfcp_unit *unit;
- unsigned long flags;
- int retval = -ENXIO;
-
- 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 && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
- &unit->status)) {
- sdp->hostdata = unit;
- unit->device = sdp;
- zfcp_unit_get(unit);
- retval = 0;
- }
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- out:
- return retval;
-}
-
-/**
- * zfcp_scsi_slave_destroy - called when scsi device is removed
- *
- * 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)
{
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
- ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
- "address %p\n", sdpnt);
+ unit->device = NULL;
+ zfcp_unit_put(unit);
}
-/*
- * called from scsi midlayer to allow finetuning of a device.
- */
-static int
-zfcp_scsi_slave_configure(struct scsi_device *sdp)
+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);
+ scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
else
scsi_adjust_queue_depth(sdp, 0, 1);
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 void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
{
- set_host_byte(&scpnt->result, result);
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
+ set_host_byte(scpnt, result);
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);
+ zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
/* return directly */
scpnt->scsi_done(scpnt);
}
-/**
- * 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, int use_timer)
-{
- int tmp;
- int retval;
-
- retval = 0;
-
- BUG_ON((adapter == NULL) || (adapter != unit->port->adapter));
- BUG_ON(scpnt->scsi_done == NULL);
-
- if (unlikely(NULL == unit)) {
- zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
- goto out;
- }
-
- 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;
- }
-
- 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);
- zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
- goto out;
- }
-
- if (unlikely(tmp < 0)) {
- ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n");
- retval = SCSI_MLQUEUE_HOST_BUSY;
- }
-
-out:
- return retval;
-}
-
-static void
-zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt)
-{
- struct completion *wait = (struct completion *) scpnt->SCp.ptr;
- complete(wait);
-}
-
-
-/**
- * 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
- * @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,
- int use_timer)
-{
- int ret;
- 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,
- use_timer);
- if (ret == 0)
- wait_for_completion(&wait);
-
- scpnt->SCp.ptr = NULL;
-
- return 0;
-}
-
-/*
- * function: zfcp_scsi_queuecommand
- *
- * purpose: enqueues a SCSI command to the specified target device
- *
- * returns: 0 - success, SCSI command enqueued
- * !0 - failure
- */
-static int
-zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
- void (*done) (struct scsi_cmnd *))
+static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
+ void (*done) (struct scsi_cmnd *))
{
struct zfcp_unit *unit;
struct zfcp_adapter *adapter;
+ int status, scsi_result, ret;
+ struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
/* reset the status for this request */
scpnt->result = 0;
* (stored there by zfcp_scsi_slave_alloc)
*/
adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
- unit = (struct zfcp_unit *) scpnt->device->hostdata;
+ unit = scpnt->device->hostdata;
+
+ BUG_ON(!adapter || (adapter != unit->port->adapter));
+ BUG_ON(!scpnt->scsi_done);
+
+ if (unlikely(!unit)) {
+ zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
+ return 0;
+ }
- return zfcp_scsi_command_async(adapter, unit, scpnt, 0);
+ scsi_result = fc_remote_port_chkready(rport);
+ if (unlikely(scsi_result)) {
+ scpnt->result = scsi_result;
+ zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
+ scpnt->scsi_done(scpnt);
+ return 0;
+ }
+
+ status = atomic_read(&unit->status);
+ if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
+ !(status & ZFCP_STATUS_COMMON_RUNNING))) {
+ zfcp_scsi_command_fail(scpnt, DID_ERROR);
+ return 0;
+ }
+
+ ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
+ if (unlikely(ret == -EBUSY))
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ else if (unlikely(ret < 0))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ return ret;
}
-static struct zfcp_unit *
-zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id,
- unsigned int lun)
+static struct zfcp_unit *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;
+ struct zfcp_unit *unit;
+ int scsi_lun;
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)
- if (lun == unit->scsi_lun) {
- retval = unit;
- goto out;
- }
+ list_for_each_entry(unit, &port->unit_list_head, list) {
+ scsi_lun = scsilun_to_int(
+ (struct scsi_lun *)&unit->fcp_lun);
+ if (lun == scsi_lun)
+ return unit;
+ }
}
- out:
- return retval;
+
+ return NULL;
}
-/**
- * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
- * @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
- *
- * 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.)
- */
-static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
+static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
{
- struct Scsi_Host *scsi_host;
- struct zfcp_adapter *adapter;
+ struct zfcp_adapter *adapter;
struct zfcp_unit *unit;
- struct zfcp_fsf_req *fsf_req;
unsigned long flags;
- unsigned long old_req_id;
- int retval = SUCCESS;
+ int retval = -ENXIO;
- scsi_host = scpnt->device->host;
- adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
- unit = (struct zfcp_unit *) scpnt->device->hostdata;
+ adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
+ if (!adapter)
+ goto out;
- ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
- scpnt, zfcp_get_busid_by_adapter(adapter));
+ 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;
+}
+
+static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
+{
+ struct Scsi_Host *scsi_host = scpnt->device->host;
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *) scsi_host->hostdata[0];
+ struct zfcp_unit *unit = scpnt->device->hostdata;
+ struct zfcp_fsf_req *old_req, *abrt_req;
+ unsigned long flags;
+ unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
+ int retval = SUCCESS;
+ int retry = 3;
+ char *dbf_tag;
/* avoid race condition between late normal completion and abort */
write_lock_irqsave(&adapter->abort_lock, flags);
- /* 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);
+ old_req = zfcp_reqlist_find(adapter, old_reqid);
spin_unlock(&adapter->req_list_lock);
- if (!fsf_req) {
+ if (!old_req) {
write_unlock_irqrestore(&adapter->abort_lock, flags);
- zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
- retval = SUCCESS;
- goto out;
+ zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
+ old_reqid);
+ return FAILED; /* completion could be in progress */
}
- fsf_req->data = 0;
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
- old_req_id = fsf_req->req_id;
+ old_req->data = NULL;
/* don't access old fsf_req after releasing the abort_lock */
write_unlock_irqrestore(&adapter->abort_lock, flags);
- 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;
- goto out;
+ while (retry--) {
+ abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
+ if (abrt_req)
+ break;
+
+ zfcp_erp_wait(adapter);
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_COMMON_RUNNING)) {
+ zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
+ old_reqid);
+ return SUCCESS;
+ }
}
+ if (!abrt_req)
+ return FAILED;
- __wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
- zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0);
- retval = SUCCESS;
- } 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);
+ wait_for_completion(&abrt_req->completion);
+
+ if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
+ dbf_tag = "okay";
+ else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
+ dbf_tag = "lte2";
+ else {
+ dbf_tag = "fail";
retval = FAILED;
}
- zfcp_fsf_req_free(fsf_req);
- out:
+ zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
+ zfcp_fsf_req_free(abrt_req);
return retval;
}
-static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
+static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
{
- int retval;
struct zfcp_unit *unit = scpnt->device->hostdata;
-
- if (!unit) {
- WARN_ON(1);
- return SUCCESS;
- }
- retval = zfcp_task_management_function(unit,
- FCP_LOGICAL_UNIT_RESET,
- scpnt);
- return retval ? FAILED : SUCCESS;
-}
-
-static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
-{
- int retval;
- struct zfcp_unit *unit = scpnt->device->hostdata;
-
- if (!unit) {
- WARN_ON(1);
- return SUCCESS;
- }
- retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt);
- return retval ? FAILED : SUCCESS;
-}
-
-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;
+ struct zfcp_fsf_req *fsf_req = NULL;
+ int retval = SUCCESS;
+ int retry = 3;
+
+ while (retry--) {
+ fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
+ if (fsf_req)
+ break;
+
+ zfcp_erp_wait(adapter);
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_COMMON_RUNNING)) {
+ zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
+ return SUCCESS;
+ }
}
+ if (!fsf_req)
+ return FAILED;
- __wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ wait_for_completion(&fsf_req->completion);
- /*
- * 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;
+ zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
+ retval = FAILED;
} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
- zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
- retval = -ENOTSUPP;
+ zfcp_dbf_scsi_devreset("nsup", tm_flags, unit, scpnt);
+ retval = FAILED;
} else
- zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
+ zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
zfcp_fsf_req_free(fsf_req);
- out:
return retval;
}
-/**
- * zfcp_scsi_eh_host_reset_handler - handler for host reset
- */
-static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
+static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
{
- struct zfcp_unit *unit;
- struct zfcp_adapter *adapter;
+ return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET);
+}
- unit = (struct zfcp_unit*) scpnt->device->hostdata;
- adapter = unit->port->adapter;
+static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
+{
+ return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET);
+}
- ZFCP_LOG_NORMAL("host reset because of problems with "
- "unit 0x%016Lx on port 0x%016Lx, adapter %s\n",
- unit->fcp_lun, unit->port->wwpn,
- zfcp_get_busid_by_adapter(unit->port->adapter));
+static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
+{
+ struct zfcp_unit *unit = scpnt->device->hostdata;
+ struct zfcp_adapter *adapter = unit->port->adapter;
- zfcp_erp_adapter_reopen(adapter, 0);
+ zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
zfcp_erp_wait(adapter);
return SUCCESS;
}
-int
-zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
+int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
{
- int retval = 0;
- static unsigned int unique_id = 0;
+ struct ccw_dev_id dev_id;
if (adapter->scsi_host)
- goto out;
+ return 0;
+ 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_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;
+ dev_err(&adapter->ccw_device->dev,
+ "Registering the FCP device with the "
+ "SCSI stack failed\n");
+ return -EIO;
}
- 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->unique_id = dev_id.devno;
+ adapter->scsi_host->max_cmd_len = 255;
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;
+ return -EIO;
}
- atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
- out:
- return retval;
+
+ return 0;
}
-void
-zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
+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)
{
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)
+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->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->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->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_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)
+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->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)
+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;
- adapter = (struct zfcp_adapter *)shost->hostdata[0];
+ adapter = (struct zfcp_adapter *)host->hostdata[0];
fc_stats = zfcp_init_fc_host_stats(adapter);
if (!fc_stats)
return NULL;
if (!data)
return NULL;
- ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
+ ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
if (ret) {
kfree(data);
- return NULL; /* XXX return zeroed fc_stats? */
+ return NULL;
}
if (adapter->stats_reset &&
((jiffies/HZ - adapter->stats_reset) <
- data->seconds_since_last_reset)) {
+ data->seconds_since_last_reset))
zfcp_adjust_fc_host_stats(fc_stats, data,
adapter->stats_reset_data);
- } else
+ 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)
+static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
{
struct zfcp_adapter *adapter;
- struct fsf_qtcb_bottom_port *data, *old_data;
+ struct fsf_qtcb_bottom_port *data;
int ret;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!data)
return;
- ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
- if (ret) {
+ ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
+ if (ret)
kfree(data);
- } else {
+ else {
adapter->stats_reset = jiffies/HZ;
- old_data = adapter->stats_reset_data;
+ kfree(adapter->stats_reset_data);
adapter->stats_reset_data = data; /* finally freed in
- adater_dequeue */
- kfree(old_data);
+ adapter_dequeue */
}
}
+static void zfcp_get_host_port_state(struct Scsi_Host *shost)
+{
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *)shost->hostdata[0];
+ int status = atomic_read(&adapter->status);
+
+ if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
+ !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
+ fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+ else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
+ fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
+ else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
+ fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
+ else
+ fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
+}
+
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
+ *
+ * Abort all pending SCSI commands for a port by closing the
+ * port. Using a reopen for avoids a conflict with a shutdown
+ * overwriting a reopen.
+ */
+static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
+{
+ struct zfcp_port *port;
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *)shost->hostdata[0];
+
+ write_lock_irq(&zfcp_data.config_lock);
+ port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
+ if (port)
+ zfcp_port_get(port);
+ write_unlock_irq(&zfcp_data.config_lock);
+
+ if (port) {
+ zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
+ zfcp_port_put(port);
+ }
+}
+
+static void zfcp_scsi_rport_register(struct zfcp_port *port)
+{
+ struct fc_rport_identifiers ids;
+ struct fc_rport *rport;
+
+ if (port->rport)
+ return;
+
+ ids.node_name = port->wwnn;
+ ids.port_name = port->wwpn;
+ ids.port_id = port->d_id;
+ ids.roles = FC_RPORT_ROLE_FCP_TARGET;
+
+ rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
+ if (!rport) {
+ dev_err(&port->adapter->ccw_device->dev,
+ "Registering port 0x%016Lx failed\n",
+ (unsigned long long)port->wwpn);
+ return;
+ }
+
+ rport->maxframe_size = port->maxframe_size;
+ rport->supported_classes = port->supported_classes;
+ port->rport = rport;
+}
+
+static void zfcp_scsi_rport_block(struct zfcp_port *port)
+{
+ struct fc_rport *rport = port->rport;
+
+ if (rport) {
+ fc_remote_port_delete(rport);
+ port->rport = NULL;
+ }
+}
+
+void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
+{
+ zfcp_port_get(port);
+ port->rport_task = RPORT_ADD;
+
+ if (!queue_work(port->adapter->work_queue, &port->rport_work))
+ zfcp_port_put(port);
+}
+
+void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
+{
+ zfcp_port_get(port);
+ port->rport_task = RPORT_DEL;
+
+ if (port->rport && queue_work(port->adapter->work_queue,
+ &port->rport_work))
+ return;
+
+ zfcp_port_put(port);
+}
+
+void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
+
+ list_for_each_entry(port, &adapter->port_list_head, list)
+ zfcp_scsi_schedule_rport_block(port);
+}
+
+void zfcp_scsi_rport_work(struct work_struct *work)
+{
+ struct zfcp_port *port = container_of(work, struct zfcp_port,
+ rport_work);
+
+ while (port->rport_task) {
+ if (port->rport_task == RPORT_ADD) {
+ port->rport_task = RPORT_NONE;
+ zfcp_scsi_rport_register(port);
+ } else {
+ port->rport_task = RPORT_NONE;
+ zfcp_scsi_rport_block(port);
+ }
+ }
+
+ zfcp_port_put(port);
+}
+
+
+void zfcp_scsi_scan(struct work_struct *work)
+{
+ struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
+ scsi_work);
+ struct fc_rport *rport;
+
+ flush_work(&unit->port->rport_work);
+ rport = unit->port->rport;
+
+ if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
+ scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
+ scsilun_to_int((struct scsi_lun *)
+ &unit->fcp_lun), 0);
+
+ zfcp_unit_put(unit);
+}
+
+static int zfcp_execute_fc_job(struct fc_bsg_job *job)
+{
+ switch (job->request->msgcode) {
+ case FC_BSG_RPT_ELS:
+ case FC_BSG_HST_ELS_NOLOGIN:
+ return zfcp_fc_execute_els_fc_job(job);
+ case FC_BSG_RPT_CT:
+ case FC_BSG_HST_CT:
+ return zfcp_fc_execute_ct_fc_job(job);
+ default:
+ return -EINVAL;
+ }
+}
+
struct fc_function_template zfcp_transport_functions = {
.show_starget_port_id = 1,
.show_starget_port_name = 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,
+ .bsg_request = zfcp_execute_fc_job,
/* no functions registered for following dynamic attributes but
directly set by LLDD */
.show_host_port_type = 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
+struct zfcp_data zfcp_data = {
+ .scsi_host_template = {
+ .name = "zfcp",
+ .module = THIS_MODULE,
+ .proc_name = "zfcp",
+ .change_queue_depth = zfcp_scsi_change_queue_depth,
+ .slave_alloc = zfcp_scsi_slave_alloc,
+ .slave_configure = zfcp_scsi_slave_configure,
+ .slave_destroy = zfcp_scsi_slave_destroy,
+ .queuecommand = zfcp_scsi_queuecommand,
+ .eh_abort_handler = zfcp_scsi_eh_abort_handler,
+ .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
+ .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
+ .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
+ .can_queue = 4096,
+ .this_id = -1,
+ .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
+ .cmd_per_lun = 1,
+ .use_clustering = 1,
+ .sdev_attrs = zfcp_sysfs_sdev_attrs,
+ .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8),
+ .shost_attrs = zfcp_sysfs_shost_attrs,
+ },
};
-
-#undef ZFCP_LOG_AREA
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff