/*
- * 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
+ * Module interface and handling of zfcp data structures.
*
- * 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, 2008
*/
/*
* Maxim Shchetynin
* Volker Sameske
* Ralph Wuerthner
+ * Michael Loehr
+ * Swen Schillig
+ * Christof Schmitt
+ * Martin Petermann
+ * Sven Schuetz
*/
+#include <linux/miscdevice.h>
#include "zfcp_ext.h"
-/* accumulated log level (module parameter) */
-static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS;
static char *device;
/*********************** FUNCTION PROTOTYPES *********************************/
/* written against the module interface */
static int __init zfcp_module_init(void);
-/* FCP related */
-static void zfcp_ns_gid_pn_handler(unsigned long);
-
-/* miscellaneous */
-static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
-static void zfcp_sg_list_free(struct zfcp_sg_list *);
-static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
- void __user *, size_t);
-static int zfcp_sg_list_copy_to_user(void __user *,
- struct zfcp_sg_list *, size_t);
-static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
-
-#define ZFCP_CFDC_IOC_MAGIC 0xDD
-#define ZFCP_CFDC_IOC \
- _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
-
-
-static const struct file_operations zfcp_cfdc_fops = {
- .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = zfcp_cfdc_dev_ioctl
-#endif
-};
-
-static struct miscdevice zfcp_cfdc_misc = {
- .minor = ZFCP_CFDC_DEV_MINOR,
- .name = ZFCP_CFDC_DEV_NAME,
- .fops = &zfcp_cfdc_fops
-};
-
/*********************** KERNEL/MODULE PARAMETERS ***************************/
/* declare driver module init/cleanup functions */
module_param(device, charp, 0400);
MODULE_PARM_DESC(device, "specify initial device");
-module_param(loglevel, uint, 0400);
-MODULE_PARM_DESC(loglevel,
- "log levels, 8 nibbles: "
- "FC ERP QDIO CIO Config FSF SCSI Other, "
- "levels: 0=none 1=normal 2=devel 3=trace");
-
/****************************************************************/
/************** Functions without logging ***********************/
/****************************************************************/
/****** Functions to handle the request ID hash table ********/
/****************************************************************/
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
-
static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
{
int idx;
return 1;
}
-#undef ZFCP_LOG_AREA
-
/****************************************************************/
/************** Uncategorised Functions *************************/
/****************************************************************/
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
-
/**
* zfcp_device_setup - setup function
* @str: pointer to parameter string
len = strlen(devstr) + 1;
str = kmalloc(len, GFP_KERNEL);
- if (!str)
- goto err_out;
+ if (!str) {
+ pr_err("zfcp: Could not allocate memory for "
+ "device parameter string, device not attached.\n");
+ return 0;
+ }
memcpy(str, devstr, len);
tmp = strchr(str, ',');
return 1;
err_out:
- ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
+ pr_err("zfcp: Parse error for device parameter string %s, "
+ "device not attached.\n", str);
kfree(str);
return 0;
}
if (!zfcp_data.gid_pn_cache)
goto out_gid_cache;
- atomic_set(&zfcp_data.loglevel, loglevel);
-
/* initialize adapter list */
INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
retval = misc_register(&zfcp_cfdc_misc);
if (retval != 0) {
- ZFCP_LOG_INFO("registration of misc device "
- "zfcp_cfdc failed\n");
+ pr_err("zfcp: registration of misc device zfcp_cfdc failed\n");
goto out_misc;
}
- ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
- ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
-
/* Initialise proc semaphores */
sema_init(&zfcp_data.config_sema, 1);
/* setup dynamic I/O */
retval = zfcp_ccw_register();
if (retval) {
- ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
+ pr_err("zfcp: Registration with common I/O layer failed.\n");
goto out_ccw_register;
}
return retval;
}
-/*
- * function: zfcp_cfdc_dev_ioctl
- *
- * purpose: Handle control file upload/download transaction via IOCTL
- * interface
- *
- * returns: 0 - Operation completed successfuly
- * -ENOTTY - Unknown IOCTL command
- * -EINVAL - Invalid sense data record
- * -ENXIO - The FCP adapter is not available
- * -EOPNOTSUPP - The FCP adapter does not have CFDC support
- * -ENOMEM - Insufficient memory
- * -EFAULT - User space memory I/O operation fault
- * -EPERM - Cannot create or queue FSF request or create SBALs
- * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
- */
-static long
-zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
- unsigned long buffer)
-{
- struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user;
- struct zfcp_adapter *adapter = NULL;
- struct zfcp_fsf_req *fsf_req = NULL;
- struct zfcp_sg_list *sg_list = NULL;
- u32 fsf_command, option;
- char *bus_id = NULL;
- int retval = 0;
-
- sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
- if (sense_data == NULL) {
- retval = -ENOMEM;
- goto out;
- }
-
- sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
- if (sg_list == NULL) {
- retval = -ENOMEM;
- goto out;
- }
-
- if (command != ZFCP_CFDC_IOC) {
- ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
- retval = -ENOTTY;
- goto out;
- }
-
- if ((sense_data_user = (void __user *) buffer) == NULL) {
- ZFCP_LOG_INFO("sense data record is required\n");
- retval = -EINVAL;
- goto out;
- }
-
- retval = copy_from_user(sense_data, sense_data_user,
- sizeof(struct zfcp_cfdc_sense_data));
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
-
- if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
- ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
- ZFCP_CFDC_SIGNATURE);
- retval = -EINVAL;
- goto out;
- }
-
- switch (sense_data->command) {
-
- case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_NORMAL_MODE;
- break;
-
- case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_FORCE;
- break;
-
- case ZFCP_CFDC_CMND_FULL_ACCESS:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_FULL_ACCESS;
- break;
-
- case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
- break;
-
- case ZFCP_CFDC_CMND_UPLOAD:
- fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
- option = 0;
- break;
-
- default:
- ZFCP_LOG_INFO("invalid command code 0x%08x\n",
- sense_data->command);
- retval = -EINVAL;
- goto out;
- }
-
- bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
- if (bus_id == NULL) {
- retval = -ENOMEM;
- goto out;
- }
- snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x",
- (sense_data->devno >> 24),
- (sense_data->devno >> 16) & 0xFF,
- (sense_data->devno & 0xFFFF));
-
- read_lock_irq(&zfcp_data.config_lock);
- adapter = zfcp_get_adapter_by_busid(bus_id);
- if (adapter)
- zfcp_adapter_get(adapter);
- read_unlock_irq(&zfcp_data.config_lock);
-
- kfree(bus_id);
-
- if (adapter == NULL) {
- ZFCP_LOG_INFO("invalid adapter\n");
- retval = -ENXIO;
- goto out;
- }
-
- if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) {
- retval = zfcp_sg_list_alloc(sg_list,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -ENOMEM;
- goto out;
- }
- }
-
- if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) &&
- (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) {
- retval = zfcp_sg_list_copy_from_user(
- sg_list, &sense_data_user->control_file,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
- }
-
- retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
- option, sg_list);
- if (retval)
- goto out;
-
- if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
- (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
- retval = -ENXIO;
- goto out;
- }
-
- sense_data->fsf_status = fsf_req->qtcb->header.fsf_status;
- memcpy(&sense_data->fsf_status_qual,
- &fsf_req->qtcb->header.fsf_status_qual,
- sizeof(union fsf_status_qual));
- memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256);
-
- retval = copy_to_user(sense_data_user, sense_data,
- sizeof(struct zfcp_cfdc_sense_data));
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
-
- if (sense_data->command & ZFCP_CFDC_UPLOAD) {
- retval = zfcp_sg_list_copy_to_user(
- &sense_data_user->control_file, sg_list,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
- }
-
- out:
- if (fsf_req != NULL)
- zfcp_fsf_req_free(fsf_req);
-
- if ((adapter != NULL) && (retval != -ENXIO))
- zfcp_adapter_put(adapter);
-
- if (sg_list != NULL) {
- zfcp_sg_list_free(sg_list);
- kfree(sg_list);
- }
-
- kfree(sense_data);
-
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_alloc - create a scatter-gather list of the specified size
- * @sg_list: structure describing a scatter gather list
- * @size: size of scatter-gather list
- * Return: 0 on success, else -ENOMEM
- *
- * In sg_list->sg a pointer to the created scatter-gather list is returned,
- * or NULL if we run out of memory. sg_list->count specifies the number of
- * elements of the scatter-gather list. The maximum size of a single element
- * in the scatter-gather list is PAGE_SIZE.
- */
-static int
-zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
-{
- struct scatterlist *sg;
- unsigned int i;
- int retval = 0;
- void *address;
-
- BUG_ON(sg_list == NULL);
-
- sg_list->count = size >> PAGE_SHIFT;
- if (size & ~PAGE_MASK)
- sg_list->count++;
- sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist),
- GFP_KERNEL);
- if (sg_list->sg == NULL) {
- sg_list->count = 0;
- retval = -ENOMEM;
- goto out;
- }
- sg_init_table(sg_list->sg, sg_list->count);
-
- for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
- sg->length = min(size, PAGE_SIZE);
- sg->offset = 0;
- address = (void *) get_zeroed_page(GFP_KERNEL);
- if (address == NULL) {
- sg_list->count = i;
- zfcp_sg_list_free(sg_list);
- retval = -ENOMEM;
- goto out;
- }
- zfcp_address_to_sg(address, sg);
- size -= sg->length;
- }
-
- out:
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_free - free memory of a scatter-gather list
- * @sg_list: structure describing a scatter-gather list
- *
- * Memory for each element in the scatter-gather list is freed.
- * Finally sg_list->sg is freed itself and sg_list->count is reset.
- */
-static void
-zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
-{
- struct scatterlist *sg;
- unsigned int i;
-
- BUG_ON(sg_list == NULL);
-
- for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
- free_page((unsigned long) zfcp_sg_to_address(sg));
-
- sg_list->count = 0;
- kfree(sg_list->sg);
-}
-
-/**
- * zfcp_sg_size - determine size of a scatter-gather list
- * @sg: array of (struct scatterlist)
- * @sg_count: elements in array
- * Return: size of entire scatter-gather list
- */
-static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
-{
- unsigned int i;
- struct scatterlist *p;
- size_t size;
-
- size = 0;
- for (i = 0, p = sg; i < sg_count; i++, p++) {
- BUG_ON(p == NULL);
- size += p->length;
- }
-
- return size;
-}
-
-
-/**
- * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
- * @sg_list: structure describing a scatter-gather list
- * @user_buffer: pointer to buffer in user space
- * @size: number of bytes to be copied
- * Return: 0 on success, -EFAULT if copy_from_user fails.
- */
-static int
-zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
- void __user *user_buffer,
- size_t size)
-{
- struct scatterlist *sg;
- unsigned int length;
- void *zfcp_buffer;
- int retval = 0;
-
- BUG_ON(sg_list == NULL);
-
- if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
- return -EFAULT;
-
- for (sg = sg_list->sg; size > 0; sg++) {
- length = min((unsigned int)size, sg->length);
- zfcp_buffer = zfcp_sg_to_address(sg);
- if (copy_from_user(zfcp_buffer, user_buffer, length)) {
- retval = -EFAULT;
- goto out;
- }
- user_buffer += length;
- size -= length;
- }
-
- out:
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
- * @user_buffer: pointer to buffer in user space
- * @sg_list: structure describing a scatter-gather list
- * @size: number of bytes to be copied
- * Return: 0 on success, -EFAULT if copy_to_user fails
- */
-static int
-zfcp_sg_list_copy_to_user(void __user *user_buffer,
- struct zfcp_sg_list *sg_list,
- size_t size)
-{
- struct scatterlist *sg;
- unsigned int length;
- void *zfcp_buffer;
- int retval = 0;
-
- BUG_ON(sg_list == NULL);
-
- if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
- return -EFAULT;
-
- for (sg = sg_list->sg; size > 0; sg++) {
- length = min((unsigned int) size, sg->length);
- zfcp_buffer = zfcp_sg_to_address(sg);
- if (copy_to_user(user_buffer, zfcp_buffer, length)) {
- retval = -EFAULT;
- goto out;
- }
- user_buffer += length;
- size -= length;
- }
-
- out:
- return retval;
-}
-
-
-#undef ZFCP_LOG_AREA
-
/****************************************************************/
/****** Functions for configuration/set-up of structures ********/
/****************************************************************/
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
-
/**
* zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
* @port: pointer to port to search for unit
unit->sysfs_device.release = zfcp_sysfs_unit_release;
dev_set_drvdata(&unit->sysfs_device, unit);
- init_waitqueue_head(&unit->scsi_scan_wq);
-
/* mark unit unusable as long as sysfs registration is not complete */
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
+ spin_lock_init(&unit->latencies.lock);
+ unit->latencies.write.channel.min = 0xFFFFFFFF;
+ unit->latencies.write.fabric.min = 0xFFFFFFFF;
+ unit->latencies.read.channel.min = 0xFFFFFFFF;
+ unit->latencies.read.fabric.min = 0xFFFFFFFF;
+ unit->latencies.cmd.channel.min = 0xFFFFFFFF;
+ unit->latencies.cmd.fabric.min = 0xFFFFFFFF;
+
if (device_register(&unit->sysfs_device)) {
kfree(unit);
return NULL;
return;
}
+int zfcp_status_read_refill(struct zfcp_adapter *adapter)
+{
+ while (atomic_read(&adapter->stat_miss) > 0)
+ if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL))
+ break;
+ else
+ atomic_dec(&adapter->stat_miss);
+
+ if (ZFCP_STATUS_READS_RECOM <= atomic_read(&adapter->stat_miss)) {
+ zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+static void _zfcp_status_read_scheduler(struct work_struct *work)
+{
+ zfcp_status_read_refill(container_of(work, struct zfcp_adapter,
+ stat_work));
+}
+
+static int zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
+
+ port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
+ ZFCP_DID_DIRECTORY_SERVICE);
+ if (!port)
+ return -ENXIO;
+ zfcp_port_put(port);
+
+ return 0;
+}
+
/*
* Enqueues an adapter at the end of the adapter list in the driver data.
* All adapter internal structures are set up.
* Proc-fs entries are also created.
*
+ * FIXME: Use -ENOMEM as return code for allocation failures
+ *
* returns: 0 if a new adapter was successfully enqueued
* ZFCP_KNOWN if an adapter with this devno was already present
* -ENOMEM if alloc failed
struct zfcp_adapter *
zfcp_adapter_enqueue(struct ccw_device *ccw_device)
{
- int retval = 0;
struct zfcp_adapter *adapter;
/*
/* try to allocate new adapter data structure (zeroed) */
adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
- if (!adapter) {
- ZFCP_LOG_INFO("error: allocation of base adapter "
- "structure failed\n");
+ if (!adapter)
goto out;
- }
ccw_device->handler = NULL;
/* save ccw_device pointer */
adapter->ccw_device = ccw_device;
- retval = zfcp_qdio_allocate_queues(adapter);
- if (retval)
- goto queues_alloc_failed;
-
- retval = zfcp_qdio_allocate(adapter);
- if (retval)
+ if (zfcp_qdio_allocate(adapter))
goto qdio_allocate_failed;
- retval = zfcp_allocate_low_mem_buffers(adapter);
- if (retval) {
- ZFCP_LOG_INFO("error: pool allocation failed\n");
+ if (zfcp_allocate_low_mem_buffers(adapter))
goto failed_low_mem_buffers;
- }
/* initialise reference count stuff */
atomic_set(&adapter->refcount, 0);
/* initialize list of fsf requests */
spin_lock_init(&adapter->req_list_lock);
- retval = zfcp_reqlist_alloc(adapter);
- if (retval) {
- ZFCP_LOG_INFO("request list initialization failed\n");
+ if (zfcp_reqlist_alloc(adapter))
goto failed_low_mem_buffers;
- }
/* initialize debug locks */
- spin_lock_init(&adapter->erp_dbf_lock);
spin_lock_init(&adapter->hba_dbf_lock);
spin_lock_init(&adapter->san_dbf_lock);
spin_lock_init(&adapter->scsi_dbf_lock);
+ spin_lock_init(&adapter->rec_dbf_lock);
- retval = zfcp_adapter_debug_register(adapter);
- if (retval)
+ if (zfcp_adapter_debug_register(adapter))
goto debug_register_failed;
/* initialize error recovery stuff */
init_waitqueue_head(&adapter->erp_done_wqh);
/* initialize lock of associated request queue */
- rwlock_init(&adapter->request_queue.queue_lock);
+ rwlock_init(&adapter->req_q.lock);
+ INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
+ INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later);
/* mark adapter unusable as long as sysfs registration is not complete */
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
zfcp_data.adapters++;
+ zfcp_nameserver_enqueue(adapter);
+
goto out;
generic_services_failed:
zfcp_reqlist_free(adapter);
failed_low_mem_buffers:
zfcp_free_low_mem_buffers(adapter);
- if (qdio_free(ccw_device) != 0)
- ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
- zfcp_get_busid_by_adapter(adapter));
qdio_allocate_failed:
- zfcp_qdio_free_queues(adapter);
- queues_alloc_failed:
+ zfcp_qdio_free(adapter);
kfree(adapter);
adapter = NULL;
out:
int retval = 0;
unsigned long flags;
+ cancel_work_sync(&adapter->scan_work);
+ cancel_work_sync(&adapter->stat_work);
zfcp_adapter_scsi_unregister(adapter);
device_unregister(&adapter->generic_services);
zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
retval = zfcp_reqlist_isempty(adapter);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
if (!retval) {
- ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
- "%i requests outstanding\n",
- zfcp_get_busid_by_adapter(adapter), adapter,
- atomic_read(&adapter->reqs_active));
retval = -EBUSY;
goto out;
}
/* decrease number of adapters in list */
zfcp_data.adapters--;
- ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
- "%i adapters still in list\n",
- zfcp_get_busid_by_adapter(adapter),
- adapter, zfcp_data.adapters);
-
- retval = qdio_free(adapter->ccw_device);
- if (retval)
- ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
- zfcp_get_busid_by_adapter(adapter));
+ zfcp_qdio_free(adapter);
zfcp_free_low_mem_buffers(adapter);
- /* free memory of adapter data structure and queues */
- zfcp_qdio_free_queues(adapter);
zfcp_reqlist_free(adapter);
kfree(adapter->fc_stats);
kfree(adapter->stats_reset_data);
- ZFCP_LOG_TRACE("freeing adapter structure\n");
kfree(adapter);
out:
return;
kfree(port);
return NULL;
}
- port->d_id = d_id;
port->sysfs_device.parent = &adapter->generic_services;
} else {
snprintf(port->sysfs_device.bus_id,
BUS_ID_SIZE, "0x%016llx", wwpn);
port->sysfs_device.parent = &adapter->ccw_device->dev;
}
+
+ port->d_id = d_id;
+
port->sysfs_device.release = zfcp_sysfs_port_release;
dev_set_drvdata(&port->sysfs_device, port);
device_unregister(&port->sysfs_device);
}
-/* Enqueues a nameserver port */
-int
-zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
-{
- struct zfcp_port *port;
-
- port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
- ZFCP_DID_DIRECTORY_SERVICE);
- if (!port) {
- ZFCP_LOG_INFO("error: enqueue of nameserver port for "
- "adapter %s failed\n",
- zfcp_get_busid_by_adapter(adapter));
- return -ENXIO;
- }
- zfcp_port_put(port);
-
- return 0;
-}
-
-#undef ZFCP_LOG_AREA
-
-/****************************************************************/
-/******* Fibre Channel Standard related Functions **************/
-/****************************************************************/
-
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
-
-static void
-zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter,
- struct fsf_status_read_buffer *status_buffer)
-{
- struct fcp_rscn_head *fcp_rscn_head;
- struct fcp_rscn_element *fcp_rscn_element;
- struct zfcp_port *port;
- u16 i;
- u16 no_entries;
- u32 range_mask;
- unsigned long flags;
-
- fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
- fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
-
- /* see FC-FS */
- no_entries = (fcp_rscn_head->payload_len / 4);
-
- for (i = 1; i < no_entries; i++) {
- /* skip head and start with 1st element */
- fcp_rscn_element++;
- switch (fcp_rscn_element->addr_format) {
- case ZFCP_PORT_ADDRESS:
- range_mask = ZFCP_PORTS_RANGE_PORT;
- break;
- case ZFCP_AREA_ADDRESS:
- range_mask = ZFCP_PORTS_RANGE_AREA;
- break;
- case ZFCP_DOMAIN_ADDRESS:
- range_mask = ZFCP_PORTS_RANGE_DOMAIN;
- break;
- case ZFCP_FABRIC_ADDRESS:
- range_mask = ZFCP_PORTS_RANGE_FABRIC;
- break;
- default:
- ZFCP_LOG_INFO("incoming RSCN with unknown "
- "address format\n");
- continue;
- }
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- list_for_each_entry(port, &adapter->port_list_head, list) {
- if (atomic_test_mask
- (ZFCP_STATUS_PORT_WKA, &port->status))
- continue;
- /* Do we know this port? If not skip it. */
- if (!atomic_test_mask
- (ZFCP_STATUS_PORT_DID_DID, &port->status)) {
- ZFCP_LOG_INFO("incoming RSCN, trying to open "
- "port 0x%016Lx\n", port->wwpn);
- zfcp_erp_port_reopen(port,
- ZFCP_STATUS_COMMON_ERP_FAILED);
- continue;
- }
-
- /*
- * FIXME: race: d_id might being invalidated
- * (...DID_DID reset)
- */
- if ((port->d_id & range_mask)
- == (fcp_rscn_element->nport_did & range_mask)) {
- ZFCP_LOG_TRACE("reopen did 0x%08x\n",
- fcp_rscn_element->nport_did);
- /*
- * Unfortunately, an RSCN does not specify the
- * type of change a target underwent. We assume
- * that it makes sense to reopen the link.
- * FIXME: Shall we try to find out more about
- * the target and link state before closing it?
- * How to accomplish this? (nameserver?)
- * Where would such code be put in?
- * (inside or outside erp)
- */
- ZFCP_LOG_INFO("incoming RSCN, trying to open "
- "port 0x%016Lx\n", port->wwpn);
- zfcp_test_link(port);
- }
- }
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- }
-}
-
-static void
-zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter,
- struct fsf_status_read_buffer *status_buffer)
+void zfcp_sg_free_table(struct scatterlist *sg, int count)
{
- struct fsf_plogi *els_plogi;
- struct zfcp_port *port;
- unsigned long flags;
-
- els_plogi = (struct fsf_plogi *) status_buffer->payload;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- list_for_each_entry(port, &adapter->port_list_head, list) {
- if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn))
- break;
- }
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) {
- ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
- "with d_id 0x%06x on adapter %s\n",
- status_buffer->d_id,
- zfcp_get_busid_by_adapter(adapter));
- } else {
- zfcp_erp_port_forced_reopen(port, 0);
- }
-}
-
-static void
-zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter,
- struct fsf_status_read_buffer *status_buffer)
-{
- struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
- struct zfcp_port *port;
- unsigned long flags;
+ int i;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- list_for_each_entry(port, &adapter->port_list_head, list) {
- if (port->wwpn == els_logo->nport_wwpn)
+ for (i = 0; i < count; i++, sg++)
+ if (sg)
+ free_page((unsigned long) sg_virt(sg));
+ else
break;
- }
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- if (!port || (port->wwpn != els_logo->nport_wwpn)) {
- ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
- "with d_id 0x%06x on adapter %s\n",
- status_buffer->d_id,
- zfcp_get_busid_by_adapter(adapter));
- } else {
- zfcp_erp_port_forced_reopen(port, 0);
- }
-}
-
-static void
-zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
- struct fsf_status_read_buffer *status_buffer)
-{
- ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
- "for adapter %s\n", *(u32 *) (status_buffer->payload),
- zfcp_get_busid_by_adapter(adapter));
-
-}
-
-void
-zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
-{
- struct fsf_status_read_buffer *status_buffer;
- u32 els_type;
- struct zfcp_adapter *adapter;
-
- status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
- els_type = *(u32 *) (status_buffer->payload);
- adapter = fsf_req->adapter;
-
- zfcp_san_dbf_event_incoming_els(fsf_req);
- if (els_type == LS_PLOGI)
- zfcp_fsf_incoming_els_plogi(adapter, status_buffer);
- else if (els_type == LS_LOGO)
- zfcp_fsf_incoming_els_logo(adapter, status_buffer);
- else if ((els_type & 0xffff0000) == LS_RSCN)
- /* we are only concerned with the command, not the length */
- zfcp_fsf_incoming_els_rscn(adapter, status_buffer);
- else
- zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
}
-
-/**
- * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
- * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
- * @pool: pointer to mempool_t if non-null memory pool is used for allocation
- */
-static int
-zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
+int zfcp_sg_setup_table(struct scatterlist *sg, int count)
{
- struct zfcp_gid_pn_data *data;
+ void *addr;
+ int i;
- if (pool != NULL) {
- data = mempool_alloc(pool, GFP_ATOMIC);
- if (likely(data != NULL)) {
- data->ct.pool = pool;
+ sg_init_table(sg, count);
+ for (i = 0; i < count; i++, sg++) {
+ addr = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!addr) {
+ zfcp_sg_free_table(sg, i);
+ return -ENOMEM;
}
- } else {
- data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC);
+ sg_set_buf(sg, addr, PAGE_SIZE);
}
-
- if (NULL == data)
- return -ENOMEM;
-
- memset(data, 0, sizeof(*data));
- data->ct.req = &data->req;
- data->ct.resp = &data->resp;
- data->ct.req_count = data->ct.resp_count = 1;
- zfcp_address_to_sg(&data->ct_iu_req, &data->req);
- zfcp_address_to_sg(&data->ct_iu_resp, &data->resp);
- data->req.length = sizeof(struct ct_iu_gid_pn_req);
- data->resp.length = sizeof(struct ct_iu_gid_pn_resp);
-
- *gid_pn = data;
return 0;
}
-
-/**
- * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
- * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
- */
-static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
-{
- if (gid_pn->ct.pool)
- mempool_free(gid_pn, gid_pn->ct.pool);
- else
- kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn);
-}
-
-/**
- * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
- * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
- */
-int
-zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
-{
- int ret;
- struct ct_iu_gid_pn_req *ct_iu_req;
- struct zfcp_gid_pn_data *gid_pn;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
- if (ret < 0) {
- ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
- "request failed for adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- goto out;
- }
-
- /* setup nameserver request */
- ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req);
- ct_iu_req->header.revision = ZFCP_CT_REVISION;
- ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
- ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
- ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS;
- ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN;
- ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE;
- ct_iu_req->wwpn = erp_action->port->wwpn;
-
- /* setup parameters for send generic command */
- gid_pn->ct.port = adapter->nameserver_port;
- gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
- gid_pn->ct.handler_data = (unsigned long) gid_pn;
- gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
- gid_pn->port = erp_action->port;
-
- ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
- erp_action);
- if (ret) {
- ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
- "failed for adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
-
- zfcp_gid_pn_buffers_free(gid_pn);
- }
-
- out:
- return ret;
-}
-
-/**
- * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
- * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
- */
-static void zfcp_ns_gid_pn_handler(unsigned long data)
-{
- struct zfcp_port *port;
- struct zfcp_send_ct *ct;
- struct ct_iu_gid_pn_req *ct_iu_req;
- struct ct_iu_gid_pn_resp *ct_iu_resp;
- struct zfcp_gid_pn_data *gid_pn;
-
-
- gid_pn = (struct zfcp_gid_pn_data *) data;
- port = gid_pn->port;
- ct = &gid_pn->ct;
- ct_iu_req = zfcp_sg_to_address(ct->req);
- ct_iu_resp = zfcp_sg_to_address(ct->resp);
-
- if (ct->status != 0)
- goto failed;
-
- if (zfcp_check_ct_response(&ct_iu_resp->header)) {
- /* FIXME: do we need some specific erp entry points */
- atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
- goto failed;
- }
- /* paranoia */
- if (ct_iu_req->wwpn != port->wwpn) {
- ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
- "lookup does not match expected wwpn 0x%016Lx "
- "for adapter %s\n", ct_iu_req->wwpn, port->wwpn,
- zfcp_get_busid_by_port(port));
- goto mismatch;
- }
-
- /* looks like a valid d_id */
- port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
- atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
- ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n",
- zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
- goto out;
-
- mismatch:
- ZFCP_LOG_DEBUG("CT IUs do not match:\n");
- ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req,
- sizeof(struct ct_iu_gid_pn_req));
- ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp,
- sizeof(struct ct_iu_gid_pn_resp));
-
- failed:
- ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
- "0x%016Lx for adapter %s\n",
- port->wwpn, zfcp_get_busid_by_port(port));
- out:
- zfcp_gid_pn_buffers_free(gid_pn);
- return;
-}
-
-/* reject CT_IU reason codes acc. to FC-GS-4 */
-static const struct zfcp_rc_entry zfcp_ct_rc[] = {
- {0x01, "invalid command code"},
- {0x02, "invalid version level"},
- {0x03, "logical error"},
- {0x04, "invalid CT_IU size"},
- {0x05, "logical busy"},
- {0x07, "protocol error"},
- {0x09, "unable to perform command request"},
- {0x0b, "command not supported"},
- {0x0d, "server not available"},
- {0x0e, "session could not be established"},
- {0xff, "vendor specific error"},
- {0, NULL},
-};
-
-/* LS_RJT reason codes acc. to FC-FS */
-static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = {
- {0x01, "invalid LS_Command code"},
- {0x03, "logical error"},
- {0x05, "logical busy"},
- {0x07, "protocol error"},
- {0x09, "unable to perform command request"},
- {0x0b, "command not supported"},
- {0x0e, "command already in progress"},
- {0xff, "vendor specific error"},
- {0, NULL},
-};
-
-/* reject reason codes according to FC-PH/FC-FS */
-static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = {
- {0x01, "invalid D_ID"},
- {0x02, "invalid S_ID"},
- {0x03, "Nx_Port not available, temporary"},
- {0x04, "Nx_Port not available, permament"},
- {0x05, "class not supported"},
- {0x06, "delimiter usage error"},
- {0x07, "TYPE not supported"},
- {0x08, "invalid Link_Control"},
- {0x09, "invalid R_CTL field"},
- {0x0a, "invalid F_CTL field"},
- {0x0b, "invalid OX_ID"},
- {0x0c, "invalid RX_ID"},
- {0x0d, "invalid SEQ_ID"},
- {0x0e, "invalid DF_CTL"},
- {0x0f, "invalid SEQ_CNT"},
- {0x10, "invalid parameter field"},
- {0x11, "exchange error"},
- {0x12, "protocol error"},
- {0x13, "incorrect length"},
- {0x14, "unsupported ACK"},
- {0x15, "class of service not supported by entity at FFFFFE"},
- {0x16, "login required"},
- {0x17, "excessive sequences attempted"},
- {0x18, "unable to establish exchange"},
- {0x1a, "fabric path not available"},
- {0x1b, "invalid VC_ID (class 4)"},
- {0x1c, "invalid CS_CTL field"},
- {0x1d, "insufficient resources for VC (class 4)"},
- {0x1f, "invalid class of service"},
- {0x20, "preemption request rejected"},
- {0x21, "preemption not enabled"},
- {0x22, "multicast error"},
- {0x23, "multicast error terminate"},
- {0x24, "process login required"},
- {0xff, "vendor specific reject"},
- {0, NULL},
-};
-
-/**
- * zfcp_rc_description - return description for given reaon code
- * @code: reason code
- * @rc_table: table of reason codes and descriptions
- */
-static const char *
-zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
-{
- const char *descr = "unknown reason code";
-
- do {
- if (code == rc_table->code) {
- descr = rc_table->description;
- break;
- }
- rc_table++;
- } while (rc_table->code && rc_table->description);
-
- return descr;
-}
-
-/**
- * zfcp_check_ct_response - evaluate reason code for CT_IU
- * @rjt: response payload to an CT_IU request
- * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
- */
-int
-zfcp_check_ct_response(struct ct_hdr *rjt)
-{
- if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
- return 0;
-
- if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
- ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
- "response code (0x%04hx)\n",
- rjt->cmd_rsp_code);
- return 1;
- }
-
- ZFCP_LOG_INFO("Generic Service command rejected\n");
- ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
- zfcp_rc_description(rjt->reason_code, zfcp_ct_rc),
- (u32) rjt->reason_code, (u32) rjt->reason_code_expl,
- (u32) rjt->vendor_unique);
-
- return 1;
-}
-
-/**
- * zfcp_print_els_rjt - print reject parameter and description for ELS reject
- * @rjt_par: reject parameter acc. to FC-PH/FC-FS
- * @rc_table: table of reason codes and descriptions
- */
-static void
-zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
- const struct zfcp_rc_entry *rc_table)
-{
- ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
- zfcp_rc_description(rjt_par->reason_code, rc_table),
- (u32) rjt_par->action, (u32) rjt_par->reason_code,
- (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique);
-}
-
-/**
- * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
- * @sq: status qualifier word
- * @rjt_par: reject parameter as described in FC-PH and FC-FS
- * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
- */
-int
-zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
-{
- int ret = -EIO;
-
- if (sq == FSF_IOSTAT_NPORT_RJT) {
- ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
- zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
- /* invalid d_id */
- if (rjt_par->reason_code == 0x01)
- ret = -EREMCHG;
- } else if (sq == FSF_IOSTAT_FABRIC_RJT) {
- ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
- zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
- /* invalid d_id */
- if (rjt_par->reason_code == 0x01)
- ret = -EREMCHG;
- } else if (sq == FSF_IOSTAT_LS_RJT) {
- ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
- zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc);
- ret = -EREMOTEIO;
- } else
- ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
-
- return ret;
-}
-
-/**
- * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
- * into zfcp_port structure
- * @port: zfcp_port structure
- * @plogi: plogi payload
- */
-void
-zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
-{
- port->maxframe_size = plogi->serv_param.common_serv_param[7] |
- ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
- if (plogi->serv_param.class1_serv_param[0] & 0x80)
- port->supported_classes |= FC_COS_CLASS1;
- if (plogi->serv_param.class2_serv_param[0] & 0x80)
- port->supported_classes |= FC_COS_CLASS2;
- if (plogi->serv_param.class3_serv_param[0] & 0x80)
- port->supported_classes |= FC_COS_CLASS3;
- if (plogi->serv_param.class4_serv_param[0] & 0x80)
- port->supported_classes |= FC_COS_CLASS4;
-}
-
-#undef ZFCP_LOG_AREA
projects / linux-2.6-omap-h63xx.git / blobdiff