/*
+ * zfcp device driver
*
- * linux/drivers/s390/scsi/zfcp_aux.c
+ * Module interface and handling of zfcp data structures.
*
- * FCP adapter driver for IBM eServer zSeries
- *
- * (C) Copyright IBM Corp. 2002, 2004
- *
- * Author(s): Martin Peschke <mpeschke@de.ibm.com>
- * Raimund Schroeder <raimund.schroeder@de.ibm.com>
+ * Copyright IBM Corporation 2002, 2009
+ */
+
+/*
+ * Driver authors:
+ * Martin Peschke (originator of the driver)
+ * Raimund Schroeder
* 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.
+ * Stefan Bader
+ * Heiko Carstens (kernel 2.6 port of the driver)
+ * Andreas Herrmann
+ * Maxim Shchetynin
+ * Volker Sameske
+ * Ralph Wuerthner
+ * Michael Loehr
+ * Swen Schillig
+ * Christof Schmitt
+ * Martin Petermann
+ * Sven Schuetz
*/
-#define ZFCP_AUX_REVISION "$Revision: 1.145 $"
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/miscdevice.h>
+#include <linux/seq_file.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 inline int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
-static inline void zfcp_sg_list_free(struct zfcp_sg_list *);
-static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
- void __user *, size_t);
-static inline 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 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
-};
+#define ZFCP_BUS_ID_SIZE 20
-/*********************** KERNEL/MODULE PARAMETERS ***************************/
-
-/* declare driver module init/cleanup functions */
-module_init(zfcp_module_init);
-
-MODULE_AUTHOR("Heiko Carstens <heiko.carstens@de.ibm.com>, "
- "Andreas Herrman <aherrman@de.ibm.com>, "
- "Martin Peschke <mpeschke@de.ibm.com>, "
- "Raimund Schroeder <raimund.schroeder@de.ibm.com>, "
- "Wolfgang Taphorn <taphorn@de.ibm.com>, "
- "Aron Zeh <arzeh@de.ibm.com>, "
- "IBM Deutschland Entwicklung GmbH");
-MODULE_DESCRIPTION
- ("FCP (SCSI over Fibre Channel) HBA driver for IBM eServer zSeries");
+MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
+MODULE_DESCRIPTION("FCP HBA driver");
MODULE_LICENSE("GPL");
-module_param(device, charp, 0400);
+static char *init_device;
+module_param_named(device, init_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 ***********************/
-/****************************************************************/
-
-void
-_zfcp_hex_dump(char *addr, int count)
+static struct kmem_cache *zfcp_cache_hw_align(const char *name,
+ unsigned long size)
{
- int i;
- for (i = 0; i < count; i++) {
- printk("%02x", addr[i]);
- if ((i % 4) == 3)
- printk(" ");
- if ((i % 32) == 31)
- printk("\n");
- }
- if (((i-1) % 32) != 31)
- printk("\n");
+ return kmem_cache_create(name, size, roundup_pow_of_two(size), 0, NULL);
}
-/****************************************************************/
-/************** Uncategorised Functions *************************/
-/****************************************************************/
+static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
+{
+ int idx;
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
+ adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head),
+ GFP_KERNEL);
+ if (!adapter->req_list)
+ return -ENOMEM;
+
+ for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
+ INIT_LIST_HEAD(&adapter->req_list[idx]);
+ return 0;
+}
/**
- * zfcp_device_setup - setup function
- * @str: pointer to parameter string
+ * zfcp_reqlist_isempty - is the request list empty
+ * @adapter: pointer to struct zfcp_adapter
*
- * Parse "device=..." parameter string.
+ * Returns: true if list is empty, false otherwise
*/
-static int __init
-zfcp_device_setup(char *devstr)
+int zfcp_reqlist_isempty(struct zfcp_adapter *adapter)
{
- char *tmp, *str;
- size_t len;
-
- if (!devstr)
- return 0;
-
- len = strlen(devstr) + 1;
- str = (char *) kmalloc(len, GFP_KERNEL);
- if (!str)
- goto err_out;
- memcpy(str, devstr, len);
-
- tmp = strchr(str, ',');
- if (!tmp)
- goto err_out;
- *tmp++ = '\0';
- strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
- zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
+ unsigned int idx;
- zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
- if (*tmp++ != ',')
- goto err_out;
- if (*tmp == '\0')
- goto err_out;
-
- zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
- if (*tmp != '\0')
- goto err_out;
- kfree(str);
+ for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
+ if (!list_empty(&adapter->req_list[idx]))
+ return 0;
return 1;
-
- err_out:
- ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
- kfree(str);
- return 0;
}
-static void __init
-zfcp_init_device_configure(void)
+static void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port;
down(&zfcp_data.config_sema);
read_lock_irq(&zfcp_data.config_lock);
- adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid);
+ adapter = zfcp_get_adapter_by_busid(busid);
if (adapter)
zfcp_adapter_get(adapter);
read_unlock_irq(&zfcp_data.config_lock);
- if (adapter == NULL)
+ if (!adapter)
goto out_adapter;
- port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
- if (!port)
+ port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
+ if (IS_ERR(port))
goto out_port;
- unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
- if (!unit)
+ unit = zfcp_unit_enqueue(port, lun);
+ if (IS_ERR(unit))
goto out_unit;
up(&zfcp_data.config_sema);
ccw_device_set_online(adapter->ccw_device);
+
zfcp_erp_wait(adapter);
+ flush_work(&unit->scsi_work);
+
down(&zfcp_data.config_sema);
zfcp_unit_put(unit);
- out_unit:
+out_unit:
zfcp_port_put(port);
- out_port:
+out_port:
zfcp_adapter_put(adapter);
- out_adapter:
+out_adapter:
up(&zfcp_data.config_sema);
return;
}
-static int __init
-zfcp_module_init(void)
+static void __init zfcp_init_device_setup(char *devstr)
{
+ char *token;
+ char *str;
+ char busid[ZFCP_BUS_ID_SIZE];
+ u64 wwpn, lun;
- int retval = 0;
-
- atomic_set(&zfcp_data.loglevel, loglevel);
-
- /* initialize adapter list */
- INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
-
- /* initialize adapters to be removed list head */
- INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
-
- zfcp_transport_template = fc_attach_transport(&zfcp_transport_functions);
- if (!zfcp_transport_template)
- return -ENODEV;
-
- retval = misc_register(&zfcp_cfdc_misc);
- if (retval != 0) {
- ZFCP_LOG_INFO("registration of misc device "
- "zfcp_cfdc failed\n");
- goto out;
- }
-
- 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);
+ /* duplicate devstr and keep the original for sysfs presentation*/
+ str = kmalloc(strlen(devstr) + 1, GFP_KERNEL);
+ if (!str)
+ return;
- /* initialise configuration rw lock */
- rwlock_init(&zfcp_data.config_lock);
+ strcpy(str, devstr);
- /* save address of data structure managing the driver module */
- zfcp_data.scsi_host_template.module = THIS_MODULE;
+ token = strsep(&str, ",");
+ if (!token || strlen(token) >= ZFCP_BUS_ID_SIZE)
+ goto err_out;
+ strncpy(busid, token, ZFCP_BUS_ID_SIZE);
- /* setup dynamic I/O */
- retval = zfcp_ccw_register();
- if (retval) {
- ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
- goto out_ccw_register;
- }
+ token = strsep(&str, ",");
+ if (!token || strict_strtoull(token, 0, (unsigned long long *) &wwpn))
+ goto err_out;
- if (zfcp_device_setup(device))
- zfcp_init_device_configure();
+ token = strsep(&str, ",");
+ if (!token || strict_strtoull(token, 0, (unsigned long long *) &lun))
+ goto err_out;
- goto out;
+ kfree(str);
+ zfcp_init_device_configure(busid, wwpn, lun);
+ return;
- out_ccw_register:
- misc_deregister(&zfcp_cfdc_misc);
- out:
- return retval;
+ err_out:
+ kfree(str);
+ pr_err("%s is not a valid SCSI device\n", devstr);
}
-/*
- * 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)
+static int __init zfcp_module_init(void)
{
- 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;
+ int retval = -ENOMEM;
- sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
- if (sense_data == NULL) {
- retval = -ENOMEM;
+ zfcp_data.gpn_ft_cache = zfcp_cache_hw_align("zfcp_gpn",
+ sizeof(struct ct_iu_gpn_ft_req));
+ if (!zfcp_data.gpn_ft_cache)
goto out;
- }
- sg_list = kmalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
- if (sg_list == NULL) {
- retval = -ENOMEM;
- goto out;
- }
- memset(sg_list, 0, sizeof(*sg_list));
+ zfcp_data.qtcb_cache = zfcp_cache_hw_align("zfcp_qtcb",
+ sizeof(struct fsf_qtcb));
+ if (!zfcp_data.qtcb_cache)
+ goto out_qtcb_cache;
- if (command != ZFCP_CFDC_IOC) {
- ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
- retval = -ENOTTY;
- goto out;
- }
+ zfcp_data.sr_buffer_cache = zfcp_cache_hw_align("zfcp_sr",
+ sizeof(struct fsf_status_read_buffer));
+ if (!zfcp_data.sr_buffer_cache)
+ goto out_sr_cache;
- if ((sense_data_user = (void __user *) buffer) == NULL) {
- ZFCP_LOG_INFO("sense data record is required\n");
- retval = -EINVAL;
- goto out;
- }
+ zfcp_data.gid_pn_cache = zfcp_cache_hw_align("zfcp_gid",
+ sizeof(struct zfcp_gid_pn_data));
+ if (!zfcp_data.gid_pn_cache)
+ goto out_gid_cache;
- 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;
- }
+ sema_init(&zfcp_data.config_sema, 1);
+ rwlock_init(&zfcp_data.config_lock);
- 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);
+ zfcp_data.scsi_transport_template =
+ fc_attach_transport(&zfcp_transport_functions);
+ if (!zfcp_data.scsi_transport_template)
+ goto out_transport;
- retval = copy_to_user(sense_data_user, sense_data,
- sizeof(struct zfcp_cfdc_sense_data));
+ retval = misc_register(&zfcp_cfdc_misc);
if (retval) {
- retval = -EFAULT;
- goto out;
+ pr_err("Registering the misc device zfcp_cfdc failed\n");
+ goto out_misc;
}
- 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 inline 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 = kmalloc(sg_list->count * sizeof(struct scatterlist),
- GFP_KERNEL);
- if (sg_list->sg == NULL) {
- sg_list->count = 0;
- retval = -ENOMEM;
- goto out;
- }
- memset(sg_list->sg, 0, sg_list->count * sizeof(struct scatterlist));
-
- 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 inline 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
- */
-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 inline 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;
+ retval = zfcp_ccw_register();
+ if (retval) {
+ pr_err("The zfcp device driver could not register with "
+ "the common I/O layer\n");
+ goto out_ccw_register;
}
- 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 inline 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;
- }
+ if (init_device)
+ zfcp_init_device_setup(init_device);
+ return 0;
- out:
+out_ccw_register:
+ misc_deregister(&zfcp_cfdc_misc);
+out_misc:
+ fc_release_transport(zfcp_data.scsi_transport_template);
+out_transport:
+ kmem_cache_destroy(zfcp_data.gid_pn_cache);
+out_gid_cache:
+ kmem_cache_destroy(zfcp_data.sr_buffer_cache);
+out_sr_cache:
+ kmem_cache_destroy(zfcp_data.qtcb_cache);
+out_qtcb_cache:
+ kmem_cache_destroy(zfcp_data.gpn_ft_cache);
+out:
return retval;
}
-
-#undef ZFCP_LOG_AREA
-
-/****************************************************************/
-/****** Functions for configuration/set-up of structures ********/
-/****************************************************************/
-
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
+module_init(zfcp_module_init);
/**
* zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
* @port: pointer to port to search for unit
* @fcp_lun: FCP LUN to search for
- * Traverse list of all units of a port and return pointer to a unit
- * with the given FCP LUN.
+ *
+ * Returns: pointer to zfcp_unit or NULL
*/
-struct zfcp_unit *
-zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
+struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, u64 fcp_lun)
{
struct zfcp_unit *unit;
- int found = 0;
- list_for_each_entry(unit, &port->unit_list_head, list) {
+ list_for_each_entry(unit, &port->unit_list_head, list)
if ((unit->fcp_lun == fcp_lun) &&
- !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
- {
- found = 1;
- break;
- }
- }
- return found ? unit : NULL;
+ !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE))
+ return unit;
+ return NULL;
}
/**
* zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
* @adapter: pointer to adapter to search for port
* @wwpn: wwpn to search for
- * Traverse list of all ports of an adapter and return pointer to a port
- * with the given wwpn.
+ *
+ * Returns: pointer to zfcp_port or NULL
*/
-struct zfcp_port *
-zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
+struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter,
+ u64 wwpn)
{
struct zfcp_port *port;
- int found = 0;
- list_for_each_entry(port, &adapter->port_list_head, list) {
+ list_for_each_entry(port, &adapter->port_list_head, list)
if ((port->wwpn == wwpn) &&
- !(atomic_read(&port->status) &
- (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
- found = 1;
- break;
- }
- }
- return found ? port : NULL;
+ !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE))
+ return port;
+ return NULL;
}
-/**
- * zfcp_get_port_by_did - find port in port list of adapter by d_id
- * @adapter: pointer to adapter to search for port
- * @d_id: d_id to search for
- * Traverse list of all ports of an adapter and return pointer to a port
- * with the given d_id.
- */
-struct zfcp_port *
-zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
+static void zfcp_sysfs_unit_release(struct device *dev)
{
- struct zfcp_port *port;
- int found = 0;
-
- list_for_each_entry(port, &adapter->port_list_head, list) {
- if ((port->d_id == d_id) &&
- !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
- {
- found = 1;
- break;
- }
- }
- return found ? port : NULL;
-}
-
-/**
- * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
- * @bus_id: bus_id to search for
- * Traverse list of all adapters and return pointer to an adapter
- * with the given bus_id.
- */
-struct zfcp_adapter *
-zfcp_get_adapter_by_busid(char *bus_id)
-{
- struct zfcp_adapter *adapter;
- int found = 0;
-
- list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
- if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
- BUS_ID_SIZE) == 0) &&
- !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
- &adapter->status)){
- found = 1;
- break;
- }
- }
- return found ? adapter : NULL;
+ kfree(container_of(dev, struct zfcp_unit, sysfs_device));
}
/**
* zfcp_unit_enqueue - enqueue unit to unit list of a port.
* @port: pointer to port where unit is added
* @fcp_lun: FCP LUN of unit to be enqueued
- * Return: pointer to enqueued unit on success, NULL on error
+ * Returns: pointer to enqueued unit on success, ERR_PTR on error
* Locks: config_sema must be held to serialize changes to the unit list
*
* Sets up some unit internal structures and creates sysfs entry.
*/
-struct zfcp_unit *
-zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
+struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun)
{
- struct zfcp_unit *unit, *tmp_unit;
- scsi_lun_t scsi_lun;
- int found;
-
- /*
- * check that there is no unit with this FCP_LUN already in list
- * and enqueue it.
- * Note: Unlike for the adapter and the port, this is an error
- */
- read_lock_irq(&zfcp_data.config_lock);
- unit = zfcp_get_unit_by_lun(port, fcp_lun);
- read_unlock_irq(&zfcp_data.config_lock);
- if (unit)
- return NULL;
+ struct zfcp_unit *unit;
- unit = kmalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
+ unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL);
if (!unit)
- return NULL;
- memset(unit, 0, sizeof (struct zfcp_unit));
+ return ERR_PTR(-ENOMEM);
- /* initialise reference count stuff */
atomic_set(&unit->refcount, 0);
init_waitqueue_head(&unit->remove_wq);
+ INIT_WORK(&unit->scsi_work, zfcp_scsi_scan);
unit->port = port;
unit->fcp_lun = fcp_lun;
- /* setup for sysfs registration */
- snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
+ dev_set_name(&unit->sysfs_device, "0x%016llx",
+ (unsigned long long) fcp_lun);
unit->sysfs_device.parent = &port->sysfs_device;
unit->sysfs_device.release = zfcp_sysfs_unit_release;
dev_set_drvdata(&unit->sysfs_device, unit);
/* mark unit unusable as long as sysfs registration is not complete */
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
- if (device_register(&unit->sysfs_device)) {
- kfree(unit);
- return NULL;
+ 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;
+
+ read_lock_irq(&zfcp_data.config_lock);
+ if (zfcp_get_unit_by_lun(port, fcp_lun)) {
+ read_unlock_irq(&zfcp_data.config_lock);
+ goto err_out_free;
}
+ read_unlock_irq(&zfcp_data.config_lock);
- if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
+ if (device_register(&unit->sysfs_device))
+ goto err_out_free;
+
+ if (sysfs_create_group(&unit->sysfs_device.kobj,
+ &zfcp_sysfs_unit_attrs)) {
device_unregister(&unit->sysfs_device);
- return NULL;
+ return ERR_PTR(-EIO);
}
zfcp_unit_get(unit);
- scsi_lun = 0;
- found = 0;
write_lock_irq(&zfcp_data.config_lock);
- list_for_each_entry(tmp_unit, &port->unit_list_head, list) {
- if (tmp_unit->scsi_lun != scsi_lun) {
- found = 1;
- break;
- }
- scsi_lun++;
- }
- unit->scsi_lun = scsi_lun;
- if (found)
- list_add_tail(&unit->list, &tmp_unit->list);
- else
- list_add_tail(&unit->list, &port->unit_list_head);
+ list_add_tail(&unit->list, &port->unit_list_head);
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
+
write_unlock_irq(&zfcp_data.config_lock);
- port->units++;
zfcp_port_get(port);
return unit;
+
+err_out_free:
+ kfree(unit);
+ return ERR_PTR(-EINVAL);
}
-void
-zfcp_unit_dequeue(struct zfcp_unit *unit)
+/**
+ * zfcp_unit_dequeue - dequeue unit
+ * @unit: pointer to zfcp_unit
+ *
+ * waits until all work is done on unit and removes it then from the unit->list
+ * of the associated port.
+ */
+void zfcp_unit_dequeue(struct zfcp_unit *unit)
{
- zfcp_unit_wait(unit);
+ wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
write_lock_irq(&zfcp_data.config_lock);
list_del(&unit->list);
write_unlock_irq(&zfcp_data.config_lock);
- unit->port->units--;
zfcp_port_put(unit->port);
- zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
+ sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs);
device_unregister(&unit->sysfs_device);
}
-static void *
-zfcp_mempool_alloc(gfp_t gfp_mask, void *size)
-{
- return kmalloc((size_t) size, gfp_mask);
-}
-
-static void
-zfcp_mempool_free(void *element, void *size)
-{
- kfree(element);
-}
-
-/*
- * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
- * commands.
- * It also genrates fcp-nameserver request/response buffer and unsolicited
- * status read fsf_req buffers.
- *
- * locks: must only be called with zfcp_data.config_sema taken
- */
-static int
-zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
+static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
{
- adapter->pool.fsf_req_erp =
- mempool_create(ZFCP_POOL_FSF_REQ_ERP_NR,
- zfcp_mempool_alloc, zfcp_mempool_free, (void *)
- sizeof(struct zfcp_fsf_req_pool_element));
-
- if (NULL == adapter->pool.fsf_req_erp)
+ /* must only be called with zfcp_data.config_sema taken */
+ adapter->pool.erp_req =
+ mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+ if (!adapter->pool.erp_req)
return -ENOMEM;
- adapter->pool.fsf_req_scsi =
- mempool_create(ZFCP_POOL_FSF_REQ_SCSI_NR,
- zfcp_mempool_alloc, zfcp_mempool_free, (void *)
- sizeof(struct zfcp_fsf_req_pool_element));
-
- if (NULL == adapter->pool.fsf_req_scsi)
+ adapter->pool.gid_pn_req =
+ mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+ if (!adapter->pool.gid_pn_req)
return -ENOMEM;
- adapter->pool.fsf_req_abort =
- mempool_create(ZFCP_POOL_FSF_REQ_ABORT_NR,
- zfcp_mempool_alloc, zfcp_mempool_free, (void *)
- sizeof(struct zfcp_fsf_req_pool_element));
-
- if (NULL == adapter->pool.fsf_req_abort)
+ adapter->pool.scsi_req =
+ mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+ if (!adapter->pool.scsi_req)
return -ENOMEM;
- adapter->pool.fsf_req_status_read =
- mempool_create(ZFCP_POOL_STATUS_READ_NR,
- zfcp_mempool_alloc, zfcp_mempool_free,
- (void *) sizeof(struct zfcp_fsf_req));
-
- if (NULL == adapter->pool.fsf_req_status_read)
+ adapter->pool.scsi_abort =
+ mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+ if (!adapter->pool.scsi_abort)
return -ENOMEM;
- adapter->pool.data_status_read =
- mempool_create(ZFCP_POOL_STATUS_READ_NR,
- zfcp_mempool_alloc, zfcp_mempool_free,
- (void *) sizeof(struct fsf_status_read_buffer));
+ adapter->pool.status_read_req =
+ mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM,
+ sizeof(struct zfcp_fsf_req));
+ if (!adapter->pool.status_read_req)
+ return -ENOMEM;
- if (NULL == adapter->pool.data_status_read)
+ adapter->pool.qtcb_pool =
+ mempool_create_slab_pool(4, zfcp_data.qtcb_cache);
+ if (!adapter->pool.qtcb_pool)
return -ENOMEM;
- adapter->pool.data_gid_pn =
- mempool_create(ZFCP_POOL_DATA_GID_PN_NR,
- zfcp_mempool_alloc, zfcp_mempool_free, (void *)
- sizeof(struct zfcp_gid_pn_data));
+ adapter->pool.status_read_data =
+ mempool_create_slab_pool(FSF_STATUS_READS_RECOM,
+ zfcp_data.sr_buffer_cache);
+ if (!adapter->pool.status_read_data)
+ return -ENOMEM;
- if (NULL == adapter->pool.data_gid_pn)
+ adapter->pool.gid_pn_data =
+ mempool_create_slab_pool(1, zfcp_data.gid_pn_cache);
+ if (!adapter->pool.gid_pn_data)
return -ENOMEM;
return 0;
}
+static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
+{
+ /* zfcp_data.config_sema must be held */
+ if (adapter->pool.erp_req)
+ mempool_destroy(adapter->pool.erp_req);
+ if (adapter->pool.scsi_req)
+ mempool_destroy(adapter->pool.scsi_req);
+ if (adapter->pool.scsi_abort)
+ mempool_destroy(adapter->pool.scsi_abort);
+ if (adapter->pool.qtcb_pool)
+ mempool_destroy(adapter->pool.qtcb_pool);
+ if (adapter->pool.status_read_req)
+ mempool_destroy(adapter->pool.status_read_req);
+ if (adapter->pool.status_read_data)
+ mempool_destroy(adapter->pool.status_read_data);
+ if (adapter->pool.gid_pn_data)
+ mempool_destroy(adapter->pool.gid_pn_data);
+}
+
/**
- * zfcp_free_low_mem_buffers - free memory pools of an adapter
- * @adapter: pointer to zfcp_adapter for which memory pools should be freed
- * locking: zfcp_data.config_sema must be held
+ * zfcp_status_read_refill - refill the long running status_read_requests
+ * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled
+ *
+ * Returns: 0 on success, 1 otherwise
+ *
+ * if there are 16 or more status_read requests missing an adapter_reopen
+ * is triggered
*/
-static void
-zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
+int zfcp_status_read_refill(struct zfcp_adapter *adapter)
+{
+ while (atomic_read(&adapter->stat_miss) > 0)
+ if (zfcp_fsf_status_read(adapter->qdio)) {
+ if (atomic_read(&adapter->stat_miss) >= 16) {
+ zfcp_erp_adapter_reopen(adapter, 0, "axsref1",
+ NULL);
+ return 1;
+ }
+ break;
+ } else
+ atomic_dec(&adapter->stat_miss);
+ return 0;
+}
+
+static void _zfcp_status_read_scheduler(struct work_struct *work)
{
- if (adapter->pool.fsf_req_erp)
- mempool_destroy(adapter->pool.fsf_req_erp);
- if (adapter->pool.fsf_req_scsi)
- mempool_destroy(adapter->pool.fsf_req_scsi);
- if (adapter->pool.fsf_req_abort)
- mempool_destroy(adapter->pool.fsf_req_abort);
- if (adapter->pool.fsf_req_status_read)
- mempool_destroy(adapter->pool.fsf_req_status_read);
- if (adapter->pool.data_status_read)
- mempool_destroy(adapter->pool.data_status_read);
- if (adapter->pool.data_gid_pn)
- mempool_destroy(adapter->pool.data_gid_pn);
+ zfcp_status_read_refill(container_of(work, struct zfcp_adapter,
+ stat_work));
}
-void
-zfcp_dummy_release(struct device *dev)
+static void zfcp_print_sl(struct seq_file *m, struct service_level *sl)
{
- return;
+ struct zfcp_adapter *adapter =
+ container_of(sl, struct zfcp_adapter, service_level);
+
+ seq_printf(m, "zfcp: %s microcode level %x\n",
+ dev_name(&adapter->ccw_device->dev),
+ adapter->fsf_lic_version);
}
-/*
+static int zfcp_setup_adapter_work_queue(struct zfcp_adapter *adapter)
+{
+ char name[TASK_COMM_LEN];
+
+ snprintf(name, sizeof(name), "zfcp_q_%s",
+ dev_name(&adapter->ccw_device->dev));
+ adapter->work_queue = create_singlethread_workqueue(name);
+
+ if (adapter->work_queue)
+ return 0;
+ return -ENOMEM;
+}
+
+static void zfcp_destroy_adapter_work_queue(struct zfcp_adapter *adapter)
+{
+ if (adapter->work_queue)
+ destroy_workqueue(adapter->work_queue);
+ adapter->work_queue = NULL;
+
+}
+
+/**
+ * zfcp_adapter_enqueue - enqueue a new adapter to the list
+ * @ccw_device: pointer to the struct cc_device
+ *
+ * Returns: 0 if a new adapter was successfully enqueued
+ * -ENOMEM if alloc failed
* 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.
- *
- * returns: 0 if a new adapter was successfully enqueued
- * ZFCP_KNOWN if an adapter with this devno was already present
- * -ENOMEM if alloc failed
* locks: config_sema must be held to serialise changes to the adapter list
*/
-struct zfcp_adapter *
-zfcp_adapter_enqueue(struct ccw_device *ccw_device)
+int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
{
- int retval = 0;
struct zfcp_adapter *adapter;
/*
- * Note: It is safe to release the list_lock, as any list changes
+ * Note: It is safe to release the list_lock, as any list changes
* are protected by the config_sema, which must be held to get here
*/
- /* try to allocate new adapter data structure (zeroed) */
- adapter = kmalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
- if (!adapter) {
- ZFCP_LOG_INFO("error: allocation of base adapter "
- "structure failed\n");
- goto out;
+ adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL);
+ if (!adapter)
+ return -ENOMEM;
+
+ adapter->gs = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL);
+ if (!adapter->gs) {
+ kfree(adapter);
+ return -ENOMEM;
}
- memset(adapter, 0, sizeof (struct zfcp_adapter));
- ccw_device->handler = NULL;
+ adapter->qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL);
+ if (!adapter->qdio)
+ goto qdio_mem_failed;
- /* save ccw_device pointer */
- adapter->ccw_device = ccw_device;
+ adapter->qdio->adapter = adapter;
- retval = zfcp_qdio_allocate_queues(adapter);
- if (retval)
- goto queues_alloc_failed;
+ ccw_device->handler = NULL;
+ adapter->ccw_device = ccw_device;
+ atomic_set(&adapter->refcount, 0);
- retval = zfcp_qdio_allocate(adapter);
- if (retval)
+ if (zfcp_qdio_allocate(adapter->qdio, ccw_device))
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);
- init_waitqueue_head(&adapter->remove_wq);
-
- /* initialise list of ports */
- INIT_LIST_HEAD(&adapter->port_list_head);
-
- /* initialise list of ports to be removed */
- INIT_LIST_HEAD(&adapter->port_remove_lh);
- /* initialize list of fsf requests */
- spin_lock_init(&adapter->fsf_req_list_lock);
- INIT_LIST_HEAD(&adapter->fsf_req_list_head);
+ if (zfcp_reqlist_alloc(adapter))
+ goto failed_low_mem_buffers;
- /* initialize debug locks */
+ if (zfcp_dbf_adapter_register(adapter))
+ goto debug_register_failed;
- 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);
+ if (zfcp_setup_adapter_work_queue(adapter))
+ goto work_queue_failed;
- /* initialize error recovery stuff */
+ init_waitqueue_head(&adapter->remove_wq);
+ init_waitqueue_head(&adapter->erp_thread_wqh);
+ init_waitqueue_head(&adapter->erp_done_wqh);
- rwlock_init(&adapter->erp_lock);
- sema_init(&adapter->erp_ready_sem, 0);
+ INIT_LIST_HEAD(&adapter->port_list_head);
INIT_LIST_HEAD(&adapter->erp_ready_head);
INIT_LIST_HEAD(&adapter->erp_running_head);
- /* initialize abort lock */
- rwlock_init(&adapter->abort_lock);
+ spin_lock_init(&adapter->req_list_lock);
- /* initialise some erp stuff */
- init_waitqueue_head(&adapter->erp_thread_wqh);
- init_waitqueue_head(&adapter->erp_done_wqh);
+ spin_lock_init(&adapter->qdio->req_q_lock);
+ spin_lock_init(&adapter->qdio->stat_lock);
- /* initialize lock of associated request queue */
- rwlock_init(&adapter->request_queue.queue_lock);
+ rwlock_init(&adapter->erp_lock);
+ rwlock_init(&adapter->abort_lock);
- /* intitialise SCSI ER timer */
- init_timer(&adapter->scsi_er_timer);
+ sema_init(&adapter->erp_ready_sem, 0);
- /* set FC service class used per default */
- adapter->fc_service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
+ INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
+ INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later);
- sprintf(adapter->name, "%s", zfcp_get_busid_by_adapter(adapter));
- ASCEBC(adapter->name, strlen(adapter->name));
+ adapter->service_level.seq_print = zfcp_print_sl;
/* mark adapter unusable as long as sysfs registration is not complete */
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
- adapter->ccw_device = ccw_device;
dev_set_drvdata(&ccw_device->dev, adapter);
- if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
+ if (sysfs_create_group(&ccw_device->dev.kobj,
+ &zfcp_sysfs_adapter_attrs))
goto sysfs_failed;
- adapter->generic_services.parent = &adapter->ccw_device->dev;
- adapter->generic_services.release = zfcp_dummy_release;
- snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE,
- "generic_services");
-
- if (device_register(&adapter->generic_services))
- goto generic_services_failed;
-
- /* put allocated adapter at list tail */
- write_lock_irq(&zfcp_data.config_lock);
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
- list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
- write_unlock_irq(&zfcp_data.config_lock);
-
- zfcp_data.adapters++;
+ zfcp_fc_wka_ports_init(adapter);
- goto out;
+ if (!zfcp_adapter_scsi_register(adapter))
+ return 0;
- generic_services_failed:
- zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
- sysfs_failed:
+sysfs_failed:
+ zfcp_destroy_adapter_work_queue(adapter);
+work_queue_failed:
+ zfcp_dbf_adapter_unregister(adapter->dbf);
+debug_register_failed:
dev_set_drvdata(&ccw_device->dev, NULL);
- failed_low_mem_buffers:
+ kfree(adapter->req_list);
+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:
+qdio_allocate_failed:
+ zfcp_qdio_free(adapter->qdio);
+ kfree(adapter->qdio);
+qdio_mem_failed:
kfree(adapter);
- adapter = NULL;
- out:
- return adapter;
+ return -ENOMEM;
}
-/*
- * returns: 0 - struct zfcp_adapter data structure successfully removed
- * !0 - struct zfcp_adapter data structure could not be removed
- * (e.g. still used)
+/**
+ * zfcp_adapter_dequeue - remove the adapter from the resource list
+ * @adapter: pointer to struct zfcp_adapter which should be removed
* locks: adapter list write lock is assumed to be held by caller
- * adapter->fsf_req_list_lock is taken and released within this
- * function and must not be held on entry
*/
-void
-zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
+void zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
{
int retval = 0;
unsigned long flags;
- device_unregister(&adapter->generic_services);
- zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
+ cancel_work_sync(&adapter->scan_work);
+ cancel_work_sync(&adapter->stat_work);
+ zfcp_fc_wka_ports_force_offline(adapter->gs);
+ zfcp_adapter_scsi_unregister(adapter);
+ sysfs_remove_group(&adapter->ccw_device->dev.kobj,
+ &zfcp_sysfs_adapter_attrs);
dev_set_drvdata(&adapter->ccw_device->dev, NULL);
/* sanity check: no pending FSF requests */
- spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
- retval = !list_empty(&adapter->fsf_req_list_head);
- spin_unlock_irqrestore(&adapter->fsf_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->fsf_reqs_active));
- retval = -EBUSY;
- goto out;
- }
-
- /* remove specified adapter data structure from list */
- write_lock_irq(&zfcp_data.config_lock);
- list_del(&adapter->list);
- write_unlock_irq(&zfcp_data.config_lock);
-
- /* 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));
-
+ spin_lock_irqsave(&adapter->req_list_lock, flags);
+ retval = zfcp_reqlist_isempty(adapter);
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+ if (!retval)
+ return;
+
+ zfcp_destroy_adapter_work_queue(adapter);
+ zfcp_dbf_adapter_unregister(adapter->dbf);
+ zfcp_qdio_free(adapter->qdio);
zfcp_free_low_mem_buffers(adapter);
- /* free memory of adapter data structure and queues */
- zfcp_qdio_free_queues(adapter);
- ZFCP_LOG_TRACE("freeing adapter structure\n");
+ kfree(adapter->req_list);
+ kfree(adapter->fc_stats);
+ kfree(adapter->stats_reset_data);
+ kfree(adapter->gs);
+ kfree(adapter->qdio);
kfree(adapter);
- out:
- return;
+}
+
+static void zfcp_sysfs_port_release(struct device *dev)
+{
+ kfree(container_of(dev, struct zfcp_port, sysfs_device));
}
/**
* @wwpn: WWPN of the remote port to be enqueued
* @status: initial status for the port
* @d_id: destination id of the remote port to be enqueued
- * Return: pointer to enqueued port on success, NULL on error
+ * Returns: pointer to enqueued port on success, ERR_PTR on error
* Locks: config_sema must be held to serialize changes to the port list
*
* All port internal structures are set up and the sysfs entry is generated.
* d_id is used to enqueue ports with a well known address like the Directory
* Service for nameserver lookup.
*/
-struct zfcp_port *
-zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
- u32 d_id)
+struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
+ u32 status, u32 d_id)
{
struct zfcp_port *port;
- int check_wwpn;
+ int retval;
- check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
- /*
- * check that there is no port with this WWPN already in list
- */
- if (check_wwpn) {
- read_lock_irq(&zfcp_data.config_lock);
- port = zfcp_get_port_by_wwpn(adapter, wwpn);
- read_unlock_irq(&zfcp_data.config_lock);
- if (port)
- return NULL;
- }
-
- port = kmalloc(sizeof (struct zfcp_port), GFP_KERNEL);
+ port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL);
if (!port)
- return NULL;
- memset(port, 0, sizeof (struct zfcp_port));
+ return ERR_PTR(-ENOMEM);
- /* initialise reference count stuff */
- atomic_set(&port->refcount, 0);
init_waitqueue_head(&port->remove_wq);
-
INIT_LIST_HEAD(&port->unit_list_head);
- INIT_LIST_HEAD(&port->unit_remove_lh);
+ INIT_WORK(&port->gid_pn_work, zfcp_fc_port_did_lookup);
+ INIT_WORK(&port->test_link_work, zfcp_fc_link_test_work);
+ INIT_WORK(&port->rport_work, zfcp_scsi_rport_work);
port->adapter = adapter;
+ port->d_id = d_id;
+ port->wwpn = wwpn;
+ port->rport_task = RPORT_NONE;
- if (check_wwpn)
- port->wwpn = wwpn;
+ /* mark port unusable as long as sysfs registration is not complete */
+ atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
+ atomic_set(&port->refcount, 0);
- atomic_set_mask(status, &port->status);
+ dev_set_name(&port->sysfs_device, "0x%016llx",
+ (unsigned long long)wwpn);
+ port->sysfs_device.parent = &adapter->ccw_device->dev;
- /* setup for sysfs registration */
- if (status & ZFCP_STATUS_PORT_WKA) {
- switch (d_id) {
- case ZFCP_DID_DIRECTORY_SERVICE:
- snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
- "directory");
- break;
- case ZFCP_DID_MANAGEMENT_SERVICE:
- snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
- "management");
- break;
- case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
- snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
- "key_distribution");
- break;
- case ZFCP_DID_ALIAS_SERVICE:
- snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
- "alias");
- break;
- case ZFCP_DID_TIME_SERVICE:
- snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
- "time");
- break;
- default:
- 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->sysfs_device.release = zfcp_sysfs_port_release;
dev_set_drvdata(&port->sysfs_device, port);
- /* mark port unusable as long as sysfs registration is not complete */
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
-
- if (device_register(&port->sysfs_device)) {
- kfree(port);
- return NULL;
+ read_lock_irq(&zfcp_data.config_lock);
+ if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
+ read_unlock_irq(&zfcp_data.config_lock);
+ goto err_out_free;
}
+ read_unlock_irq(&zfcp_data.config_lock);
- if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
+ if (device_register(&port->sysfs_device))
+ goto err_out_free;
+
+ retval = sysfs_create_group(&port->sysfs_device.kobj,
+ &zfcp_sysfs_port_attrs);
+
+ if (retval) {
device_unregister(&port->sysfs_device);
- return NULL;
+ goto err_out;
}
zfcp_port_get(port);
list_add_tail(&port->list, &adapter->port_list_head);
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
- if (d_id == ZFCP_DID_DIRECTORY_SERVICE)
- if (!adapter->nameserver_port)
- adapter->nameserver_port = port;
- adapter->ports++;
+
write_unlock_irq(&zfcp_data.config_lock);
zfcp_adapter_get(adapter);
-
return port;
+
+err_out_free:
+ kfree(port);
+err_out:
+ return ERR_PTR(-EINVAL);
}
-void
-zfcp_port_dequeue(struct zfcp_port *port)
+/**
+ * zfcp_port_dequeue - dequeues a port from the port list of the adapter
+ * @port: pointer to struct zfcp_port which should be removed
+ */
+void zfcp_port_dequeue(struct zfcp_port *port)
{
- zfcp_port_wait(port);
write_lock_irq(&zfcp_data.config_lock);
list_del(&port->list);
- port->adapter->ports--;
write_unlock_irq(&zfcp_data.config_lock);
- if (port->rport)
- fc_remote_port_delete(port->rport);
- port->rport = NULL;
+ if (port->rport) {
+ port->rport->dd_data = NULL;
+ port->rport = NULL;
+ }
+ wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
+ cancel_work_sync(&port->rport_work); /* usually not necessary */
zfcp_adapter_put(port->adapter);
- zfcp_sysfs_port_remove_files(&port->sysfs_device,
- atomic_read(&port->status));
+ sysfs_remove_group(&port->sysfs_device.kobj, &zfcp_sysfs_port_attrs);
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
-
-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)
-{
- logi *els_logi = (logi *) status_buffer->payload;
- struct zfcp_port *port;
- unsigned long flags;
-
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- list_for_each_entry(port, &adapter->port_list_head, list) {
- if (port->wwpn == (*(wwn_t *) & els_logi->nport_wwn))
- break;
- }
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- if (!port || (port->wwpn != (*(wwn_t *) & els_logi->nport_wwn))) {
- ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
- "with d_id 0x%08x 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;
-
- 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)
- 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%08x 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
+ * zfcp_sg_free_table - free memory used by scatterlists
+ * @sg: pointer to scatterlist
+ * @count: number of scatterlist which are to be free'ed
+ * the scatterlist are expected to reference pages always
*/
-static int
-zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
+void zfcp_sg_free_table(struct scatterlist *sg, int count)
{
- struct zfcp_gid_pn_data *data;
-
- if (pool != NULL) {
- data = mempool_alloc(pool, GFP_ATOMIC);
- if (likely(data != NULL)) {
- data->ct.pool = pool;
- }
- } else {
- data = kmalloc(sizeof(struct zfcp_gid_pn_data), GFP_ATOMIC);
- }
-
- 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 != 0))
- mempool_free(gid_pn, gid_pn->ct.pool);
- else
- kfree(gid_pn);
-
- return;
-}
-
-/**
- * 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->ct.timer = &erp_action->timer;
- 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%08x\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 inline const char *
-zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
-{
- const char *descr = "unknown reason code";
+ int i;
- do {
- if (code == rc_table->code) {
- descr = rc_table->description;
+ for (i = 0; i < count; i++, sg++)
+ if (sg)
+ free_page((unsigned long) sg_virt(sg));
+ else
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
+ * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers
+ * @sg: pointer to struct scatterlist
+ * @count: number of scatterlists which should be assigned with buffers
+ * of size page
+ *
+ * Returns: 0 on success, -ENOMEM otherwise
*/
-int
-zfcp_check_ct_response(struct ct_hdr *rjt)
+int zfcp_sg_setup_table(struct scatterlist *sg, int count)
{
- if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
- return 0;
+ void *addr;
+ int i;
- 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;
+ 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;
+ }
+ sg_set_buf(sg, addr, PAGE_SIZE);
}
-
- 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 inline 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;
+ return 0;
}
-
-#undef ZFCP_LOG_AREA
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff