X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fs390%2Fscsi%2Fzfcp_aux.c;h=85093b71f9fa52ebc9f0f95716c16f840111a926;hb=refs%2Fheads%2Fvserver;hp=95b92f317b6fcff2e0a073462d920434b74117aa;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 95b92f317..85093b71f 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -1,18 +1,8 @@ /* + * This file is part of the zfcp device driver for + * FCP adapters for IBM System z9 and zSeries. * - * linux/drivers/s390/scsi/zfcp_aux.c - * - * FCP adapter driver for IBM eServer zSeries - * - * (C) Copyright IBM Corp. 2002, 2004 - * - * Author(s): Martin Peschke - * Raimund Schroeder - * Aron Zeh - * Wolfgang Taphorn - * Stefan Bader - * Heiko Carstens - * Andreas Herrmann + * (C) Copyright IBM Corp. 2002, 2006 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -29,6 +19,20 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +/* + * Driver authors: + * Martin Peschke (originator of the driver) + * Raimund Schroeder + * Aron Zeh + * Wolfgang Taphorn + * Stefan Bader + * Heiko Carstens (kernel 2.6 port of the driver) + * Andreas Herrmann + * Maxim Shchetynin + * Volker Sameske + * Ralph Wuerthner + */ + #include "zfcp_ext.h" /* accumulated log level (module parameter) */ @@ -75,15 +79,9 @@ static struct miscdevice zfcp_cfdc_misc = { /* declare driver module init/cleanup functions */ module_init(zfcp_module_init); -MODULE_AUTHOR("Heiko Carstens , " - "Andreas Herrman , " - "Martin Peschke , " - "Raimund Schroeder , " - "Wolfgang Taphorn , " - "Aron Zeh , " - "IBM Deutschland Entwicklung GmbH"); +MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); MODULE_DESCRIPTION - ("FCP (SCSI over Fibre Channel) HBA driver for IBM eServer zSeries"); + ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries"); MODULE_LICENSE("GPL"); module_param(device, charp, 0400); @@ -114,6 +112,109 @@ _zfcp_hex_dump(char *addr, int count) printk("\n"); } + +/****************************************************************/ +/****** Functions to handle the request ID hash table ********/ +/****************************************************************/ + +#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF + +static int zfcp_reqlist_init(struct zfcp_adapter *adapter) +{ + int i; + + adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head), + GFP_KERNEL); + + if (!adapter->req_list) + return -ENOMEM; + + for (i=0; ireq_list[i]); + + return 0; +} + +static void zfcp_reqlist_free(struct zfcp_adapter *adapter) +{ + struct zfcp_fsf_req *request, *tmp; + unsigned int i; + + for (i=0; ireq_list[i])) + continue; + + list_for_each_entry_safe(request, tmp, + &adapter->req_list[i], list) + list_del(&request->list); + } + + kfree(adapter->req_list); +} + +void zfcp_reqlist_add(struct zfcp_adapter *adapter, + struct zfcp_fsf_req *fsf_req) +{ + unsigned int i; + + i = fsf_req->req_id % REQUEST_LIST_SIZE; + list_add_tail(&fsf_req->list, &adapter->req_list[i]); +} + +void zfcp_reqlist_remove(struct zfcp_adapter *adapter, unsigned long req_id) +{ + struct zfcp_fsf_req *request, *tmp; + unsigned int i, counter; + u64 dbg_tmp[2]; + + i = req_id % REQUEST_LIST_SIZE; + BUG_ON(list_empty(&adapter->req_list[i])); + + counter = 0; + list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list) { + if (request->req_id == req_id) { + dbg_tmp[0] = (u64) atomic_read(&adapter->reqs_active); + dbg_tmp[1] = (u64) counter; + debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16); + list_del(&request->list); + break; + } + counter++; + } +} + +struct zfcp_fsf_req *zfcp_reqlist_ismember(struct zfcp_adapter *adapter, + unsigned long req_id) +{ + struct zfcp_fsf_req *request, *tmp; + unsigned int i; + + /* 0 is reserved as an invalid req_id */ + if (req_id == 0) + return NULL; + + i = req_id % REQUEST_LIST_SIZE; + + list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list) + if (request->req_id == req_id) + return request; + + return NULL; +} + +int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) +{ + unsigned int i; + + for (i=0; ireq_list[i])) + return 0; + + return 1; +} + +#undef ZFCP_LOG_AREA + /****************************************************************/ /************** Uncategorised Functions *************************/ /****************************************************************/ @@ -136,7 +237,7 @@ zfcp_device_setup(char *devstr) return 0; len = strlen(devstr) + 1; - str = (char *) kmalloc(len, GFP_KERNEL); + str = kmalloc(len, GFP_KERNEL); if (!str) goto err_out; memcpy(str, devstr, len); @@ -202,11 +303,45 @@ zfcp_init_device_configure(void) return; } +static int calc_alignment(int size) +{ + int align = 1; + + if (!size) + return 0; + + while ((size - align) > 0) + align <<= 1; + + return align; +} + static int __init zfcp_module_init(void) { + int retval = -ENOMEM; + int size, align; + + size = sizeof(struct zfcp_fsf_req_qtcb); + align = calc_alignment(size); + zfcp_data.fsf_req_qtcb_cache = + kmem_cache_create("zfcp_fsf", size, align, 0, NULL, NULL); + if (!zfcp_data.fsf_req_qtcb_cache) + goto out; - int retval = 0; + size = sizeof(struct fsf_status_read_buffer); + align = calc_alignment(size); + zfcp_data.sr_buffer_cache = + kmem_cache_create("zfcp_sr", size, align, 0, NULL, NULL); + if (!zfcp_data.sr_buffer_cache) + goto out_sr_cache; + + size = sizeof(struct zfcp_gid_pn_data); + align = calc_alignment(size); + zfcp_data.gid_pn_cache = + kmem_cache_create("zfcp_gid", size, align, 0, NULL, NULL); + if (!zfcp_data.gid_pn_cache) + goto out_gid_cache; atomic_set(&zfcp_data.loglevel, loglevel); @@ -216,15 +351,16 @@ zfcp_module_init(void) /* 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; + zfcp_data.scsi_transport_template = + fc_attach_transport(&zfcp_transport_functions); + if (!zfcp_data.scsi_transport_template) + goto out_transport; retval = misc_register(&zfcp_cfdc_misc); if (retval != 0) { ZFCP_LOG_INFO("registration of misc device " "zfcp_cfdc failed\n"); - goto out; + goto out_misc; } ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", @@ -236,9 +372,6 @@ zfcp_module_init(void) /* initialise configuration rw lock */ rwlock_init(&zfcp_data.config_lock); - /* save address of data structure managing the driver module */ - zfcp_data.scsi_host_template.module = THIS_MODULE; - /* setup dynamic I/O */ retval = zfcp_ccw_register(); if (retval) { @@ -253,6 +386,14 @@ zfcp_module_init(void) 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.fsf_req_qtcb_cache); out: return retval; } @@ -291,12 +432,11 @@ zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, goto out; } - sg_list = kmalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); + sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); if (sg_list == NULL) { retval = -ENOMEM; goto out; } - memset(sg_list, 0, sizeof(*sg_list)); if (command != ZFCP_CFDC_IOC) { ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); @@ -478,14 +618,13 @@ zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) sg_list->count = size >> PAGE_SHIFT; if (size & ~PAGE_MASK) sg_list->count++; - sg_list->sg = kmalloc(sg_list->count * sizeof(struct scatterlist), + 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; } - 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); @@ -744,7 +883,7 @@ struct zfcp_unit * zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) { struct zfcp_unit *unit, *tmp_unit; - scsi_lun_t scsi_lun; + unsigned int scsi_lun; int found; /* @@ -758,10 +897,9 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) if (unit) return NULL; - 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)); /* initialise reference count stuff */ atomic_set(&unit->refcount, 0); @@ -829,18 +967,6 @@ zfcp_unit_dequeue(struct zfcp_unit *unit) 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. @@ -853,51 +979,39 @@ 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) + mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR, + zfcp_data.fsf_req_qtcb_cache); + if (!adapter->pool.fsf_req_erp) 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) + mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR, + zfcp_data.fsf_req_qtcb_cache); + if (!adapter->pool.fsf_req_scsi) 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) + mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR, + zfcp_data.fsf_req_qtcb_cache); + if (!adapter->pool.fsf_req_abort) 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) + mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, + sizeof(struct zfcp_fsf_req)); + if (!adapter->pool.fsf_req_status_read) 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)); - - if (NULL == adapter->pool.data_status_read) + mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR, + zfcp_data.sr_buffer_cache); + if (!adapter->pool.data_status_read) 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)); - - if (NULL == adapter->pool.data_gid_pn) + mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR, + zfcp_data.gid_pn_cache); + if (!adapter->pool.data_gid_pn) return -ENOMEM; return 0; @@ -953,13 +1067,12 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) */ /* try to allocate new adapter data structure (zeroed) */ - adapter = kmalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); + adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); if (!adapter) { ZFCP_LOG_INFO("error: allocation of base adapter " "structure failed\n"); goto out; } - memset(adapter, 0, sizeof (struct zfcp_adapter)); ccw_device->handler = NULL; @@ -991,8 +1104,12 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) 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); + spin_lock_init(&adapter->req_list_lock); + retval = zfcp_reqlist_init(adapter); + if (retval) { + ZFCP_LOG_INFO("request list initialization failed\n"); + goto failed_low_mem_buffers; + } /* initialize debug locks */ @@ -1018,15 +1135,6 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) /* initialize lock of associated request queue */ rwlock_init(&adapter->request_queue.queue_lock); - /* intitialise SCSI ER timer */ - init_timer(&adapter->scsi_er_timer); - - /* set FC service class used per default */ - adapter->fc_service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; - - sprintf(adapter->name, "%s", zfcp_get_busid_by_adapter(adapter)); - ASCEBC(adapter->name, strlen(adapter->name)); - /* mark adapter unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); @@ -1077,8 +1185,6 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) * !0 - struct zfcp_adapter data structure could not be removed * (e.g. still used) * 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) @@ -1090,14 +1196,14 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); 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) { + spin_lock_irqsave(&adapter->req_list_lock, flags); + 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->fsf_reqs_active)); + atomic_read(&adapter->reqs_active)); retval = -EBUSY; goto out; } @@ -1123,6 +1229,7 @@ zfcp_adapter_dequeue(struct zfcp_adapter *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"); @@ -1163,10 +1270,9 @@ zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, 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)); /* initialise reference count stuff */ atomic_set(&port->refcount, 0); @@ -1378,18 +1484,19 @@ 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 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_logi->nport_wwn)) + 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_logi->nport_wwn))) { + if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) { ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " "with d_id 0x%08x on adapter %s\n", status_buffer->d_id, @@ -1543,7 +1650,6 @@ zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) 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, @@ -1784,4 +1890,25 @@ zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) 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