| /* bnx2i.c: Broadcom NetXtreme II iSCSI driver. |
| * |
| * Copyright (c) 2006 - 2012 Broadcom Corporation |
| * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. |
| * Copyright (c) 2007, 2008 Mike Christie |
| * |
| * 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. |
| * |
| * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) |
| * Maintained by: Eddie Wai (eddie.wai@broadcom.com) |
| */ |
| |
| #include "bnx2i.h" |
| |
| static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list); |
| static u32 adapter_count; |
| |
| #define DRV_MODULE_NAME "bnx2i" |
| #define DRV_MODULE_VERSION "2.7.2.2" |
| #define DRV_MODULE_RELDATE "Apr 25, 2012" |
| |
| static char version[] __devinitdata = |
| "Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \ |
| " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
| |
| |
| MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com> and " |
| "Eddie Wai <eddie.wai@broadcom.com>"); |
| |
| MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711/57712" |
| "/57800/57810/57840 iSCSI Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_MODULE_VERSION); |
| |
| static DEFINE_MUTEX(bnx2i_dev_lock); |
| |
| unsigned int event_coal_min = 24; |
| module_param(event_coal_min, int, 0664); |
| MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands"); |
| |
| unsigned int event_coal_div = 2; |
| module_param(event_coal_div, int, 0664); |
| MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor"); |
| |
| unsigned int en_tcp_dack = 1; |
| module_param(en_tcp_dack, int, 0664); |
| MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK"); |
| |
| unsigned int error_mask1 = 0x00; |
| module_param(error_mask1, uint, 0664); |
| MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1"); |
| |
| unsigned int error_mask2 = 0x00; |
| module_param(error_mask2, uint, 0664); |
| MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2"); |
| |
| unsigned int sq_size; |
| module_param(sq_size, int, 0664); |
| MODULE_PARM_DESC(sq_size, "Configure SQ size"); |
| |
| unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT; |
| module_param(rq_size, int, 0664); |
| MODULE_PARM_DESC(rq_size, "Configure RQ size"); |
| |
| u64 iscsi_error_mask = 0x00; |
| |
| DEFINE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); |
| |
| static int bnx2i_cpu_callback(struct notifier_block *nfb, |
| unsigned long action, void *hcpu); |
| /* notification function for CPU hotplug events */ |
| static struct notifier_block bnx2i_cpu_notifier = { |
| .notifier_call = bnx2i_cpu_callback, |
| }; |
| |
| |
| /** |
| * bnx2i_identify_device - identifies NetXtreme II device type |
| * @hba: Adapter structure pointer |
| * |
| * This function identifies the NX2 device type and sets appropriate |
| * queue mailbox register access method, 5709 requires driver to |
| * access MBOX regs using *bin* mode |
| */ |
| void bnx2i_identify_device(struct bnx2i_hba *hba) |
| { |
| hba->cnic_dev_type = 0; |
| if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) || |
| (hba->pci_did == PCI_DEVICE_ID_NX2_5706S)) |
| set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type); |
| else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) || |
| (hba->pci_did == PCI_DEVICE_ID_NX2_5708S)) |
| set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type); |
| else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) || |
| (hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) { |
| set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type); |
| hba->mail_queue_access = BNX2I_MQ_BIN_MODE; |
| } else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57711 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57711E || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57712 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57712E || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57800 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57800_MF || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57800_VF || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57810 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57810_MF || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57810_VF || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57840 || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57840_MF || |
| hba->pci_did == PCI_DEVICE_ID_NX2_57840_VF) |
| set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type); |
| else |
| printk(KERN_ALERT "bnx2i: unknown device, 0x%x\n", |
| hba->pci_did); |
| } |
| |
| |
| /** |
| * get_adapter_list_head - returns head of adapter list |
| */ |
| struct bnx2i_hba *get_adapter_list_head(void) |
| { |
| struct bnx2i_hba *hba = NULL; |
| struct bnx2i_hba *tmp_hba; |
| |
| if (!adapter_count) |
| goto hba_not_found; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| list_for_each_entry(tmp_hba, &adapter_list, link) { |
| if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) { |
| hba = tmp_hba; |
| break; |
| } |
| } |
| mutex_unlock(&bnx2i_dev_lock); |
| hba_not_found: |
| return hba; |
| } |
| |
| |
| /** |
| * bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance |
| * @cnic: pointer to cnic device instance |
| * |
| */ |
| struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic) |
| { |
| struct bnx2i_hba *hba, *temp; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| list_for_each_entry_safe(hba, temp, &adapter_list, link) { |
| if (hba->cnic == cnic) { |
| mutex_unlock(&bnx2i_dev_lock); |
| return hba; |
| } |
| } |
| mutex_unlock(&bnx2i_dev_lock); |
| return NULL; |
| } |
| |
| |
| /** |
| * bnx2i_start - cnic callback to initialize & start adapter instance |
| * @handle: transparent handle pointing to adapter structure |
| * |
| * This function maps adapter structure to pcidev structure and initiates |
| * firmware handshake to enable/initialize on chip iscsi components |
| * This bnx2i - cnic interface api callback is issued after following |
| * 2 conditions are met - |
| * a) underlying network interface is up (marked by event 'NETDEV_UP' |
| * from netdev |
| * b) bnx2i adapter instance is registered |
| */ |
| void bnx2i_start(void *handle) |
| { |
| #define BNX2I_INIT_POLL_TIME (1000 / HZ) |
| struct bnx2i_hba *hba = handle; |
| int i = HZ; |
| |
| /* |
| * We should never register devices that don't support iSCSI |
| * (see bnx2i_init_one), so something is wrong if we try to |
| * start a iSCSI adapter on hardware with 0 supported iSCSI |
| * connections |
| */ |
| BUG_ON(!hba->cnic->max_iscsi_conn); |
| |
| bnx2i_send_fw_iscsi_init_msg(hba); |
| while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--) |
| msleep(BNX2I_INIT_POLL_TIME); |
| } |
| |
| |
| /** |
| * bnx2i_chip_cleanup - local routine to handle chip cleanup |
| * @hba: Adapter instance to register |
| * |
| * Driver checks if adapter still has any active connections before |
| * executing the cleanup process |
| */ |
| static void bnx2i_chip_cleanup(struct bnx2i_hba *hba) |
| { |
| struct bnx2i_endpoint *bnx2i_ep; |
| struct list_head *pos, *tmp; |
| |
| if (hba->ofld_conns_active) { |
| /* Stage to force the disconnection |
| * This is the case where the daemon is either slow or |
| * not present |
| */ |
| printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active " |
| "connections\n", hba->netdev->name, |
| hba->ofld_conns_active); |
| mutex_lock(&hba->net_dev_lock); |
| list_for_each_safe(pos, tmp, &hba->ep_active_list) { |
| bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link); |
| /* Clean up the chip only */ |
| bnx2i_hw_ep_disconnect(bnx2i_ep); |
| bnx2i_ep->cm_sk = NULL; |
| } |
| mutex_unlock(&hba->net_dev_lock); |
| } |
| } |
| |
| |
| /** |
| * bnx2i_stop - cnic callback to shutdown adapter instance |
| * @handle: transparent handle pointing to adapter structure |
| * |
| * driver checks if adapter is already in shutdown mode, if not start |
| * the shutdown process |
| */ |
| void bnx2i_stop(void *handle) |
| { |
| struct bnx2i_hba *hba = handle; |
| int conns_active; |
| int wait_delay = 1 * HZ; |
| |
| /* check if cleanup happened in GOING_DOWN context */ |
| if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN, |
| &hba->adapter_state)) { |
| iscsi_host_for_each_session(hba->shost, |
| bnx2i_drop_session); |
| wait_delay = hba->hba_shutdown_tmo; |
| } |
| /* Wait for inflight offload connection tasks to complete before |
| * proceeding. Forcefully terminate all connection recovery in |
| * progress at the earliest, either in bind(), send_pdu(LOGIN), |
| * or conn_start() |
| */ |
| wait_event_interruptible_timeout(hba->eh_wait, |
| (list_empty(&hba->ep_ofld_list) && |
| list_empty(&hba->ep_destroy_list)), |
| 2 * HZ); |
| /* Wait for all endpoints to be torn down, Chip will be reset once |
| * control returns to network driver. So it is required to cleanup and |
| * release all connection resources before returning from this routine. |
| */ |
| while (hba->ofld_conns_active) { |
| conns_active = hba->ofld_conns_active; |
| wait_event_interruptible_timeout(hba->eh_wait, |
| (hba->ofld_conns_active != conns_active), |
| wait_delay); |
| if (hba->ofld_conns_active == conns_active) |
| break; |
| } |
| bnx2i_chip_cleanup(hba); |
| |
| /* This flag should be cleared last so that ep_disconnect() gracefully |
| * cleans up connection context |
| */ |
| clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state); |
| clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); |
| } |
| |
| |
| /** |
| * bnx2i_init_one - initialize an adapter instance and allocate memory resources |
| * @hba: bnx2i adapter instance |
| * @cnic: cnic device handle |
| * |
| * Global resource lock is held during critical sections below. This routine is |
| * called from either cnic_register_driver() or device hot plug context and |
| * and does majority of device specific initialization |
| */ |
| static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic) |
| { |
| int rc; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| if (!cnic->max_iscsi_conn) { |
| printk(KERN_ALERT "bnx2i: dev %s does not support " |
| "iSCSI\n", hba->netdev->name); |
| rc = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| hba->cnic = cnic; |
| rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba); |
| if (!rc) { |
| hba->age++; |
| set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| list_add_tail(&hba->link, &adapter_list); |
| adapter_count++; |
| } else if (rc == -EBUSY) /* duplicate registration */ |
| printk(KERN_ALERT "bnx2i, duplicate registration" |
| "hba=%p, cnic=%p\n", hba, cnic); |
| else if (rc == -EAGAIN) |
| printk(KERN_ERR "bnx2i, driver not registered\n"); |
| else if (rc == -EINVAL) |
| printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI); |
| else |
| printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc); |
| |
| out: |
| mutex_unlock(&bnx2i_dev_lock); |
| |
| return rc; |
| } |
| |
| |
| /** |
| * bnx2i_ulp_init - initialize an adapter instance |
| * @dev: cnic device handle |
| * |
| * Called from cnic_register_driver() context to initialize all enumerated |
| * cnic devices. This routine allocate adapter structure and other |
| * device specific resources. |
| */ |
| void bnx2i_ulp_init(struct cnic_dev *dev) |
| { |
| struct bnx2i_hba *hba; |
| |
| /* Allocate a HBA structure for this device */ |
| hba = bnx2i_alloc_hba(dev); |
| if (!hba) { |
| printk(KERN_ERR "bnx2i init: hba initialization failed\n"); |
| return; |
| } |
| |
| /* Get PCI related information and update hba struct members */ |
| clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| if (bnx2i_init_one(hba, dev)) { |
| printk(KERN_ERR "bnx2i - hba %p init failed\n", hba); |
| bnx2i_free_hba(hba); |
| } |
| } |
| |
| |
| /** |
| * bnx2i_ulp_exit - shuts down adapter instance and frees all resources |
| * @dev: cnic device handle |
| * |
| */ |
| void bnx2i_ulp_exit(struct cnic_dev *dev) |
| { |
| struct bnx2i_hba *hba; |
| |
| hba = bnx2i_find_hba_for_cnic(dev); |
| if (!hba) { |
| printk(KERN_INFO "bnx2i_ulp_exit: hba not " |
| "found, dev 0x%p\n", dev); |
| return; |
| } |
| mutex_lock(&bnx2i_dev_lock); |
| list_del_init(&hba->link); |
| adapter_count--; |
| |
| if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
| hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI); |
| clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| } |
| mutex_unlock(&bnx2i_dev_lock); |
| |
| bnx2i_free_hba(hba); |
| } |
| |
| |
| /** |
| * bnx2i_get_stats - Retrieve various statistic from iSCSI offload |
| * @handle: bnx2i_hba |
| * |
| * function callback exported via bnx2i - cnic driver interface to |
| * retrieve various iSCSI offload related statistics. |
| */ |
| int bnx2i_get_stats(void *handle) |
| { |
| struct bnx2i_hba *hba = handle; |
| struct iscsi_stats_info *stats; |
| |
| if (!hba) |
| return -EINVAL; |
| |
| stats = (struct iscsi_stats_info *)hba->cnic->stats_addr; |
| |
| if (!stats) |
| return -ENOMEM; |
| |
| strlcpy(stats->version, DRV_MODULE_VERSION, sizeof(stats->version)); |
| memcpy(stats->mac_add1 + 2, hba->cnic->mac_addr, ETH_ALEN); |
| |
| stats->max_frame_size = hba->netdev->mtu; |
| stats->txq_size = hba->max_sqes; |
| stats->rxq_size = hba->max_cqes; |
| |
| stats->txq_avg_depth = 0; |
| stats->rxq_avg_depth = 0; |
| |
| GET_STATS_64(hba, stats, rx_pdus); |
| GET_STATS_64(hba, stats, rx_bytes); |
| |
| GET_STATS_64(hba, stats, tx_pdus); |
| GET_STATS_64(hba, stats, tx_bytes); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * bnx2i_percpu_thread_create - Create a receive thread for an |
| * online CPU |
| * |
| * @cpu: cpu index for the online cpu |
| */ |
| static void bnx2i_percpu_thread_create(unsigned int cpu) |
| { |
| struct bnx2i_percpu_s *p; |
| struct task_struct *thread; |
| |
| p = &per_cpu(bnx2i_percpu, cpu); |
| |
| thread = kthread_create_on_node(bnx2i_percpu_io_thread, (void *)p, |
| cpu_to_node(cpu), |
| "bnx2i_thread/%d", cpu); |
| /* bind thread to the cpu */ |
| if (likely(!IS_ERR(thread))) { |
| kthread_bind(thread, cpu); |
| p->iothread = thread; |
| wake_up_process(thread); |
| } |
| } |
| |
| |
| static void bnx2i_percpu_thread_destroy(unsigned int cpu) |
| { |
| struct bnx2i_percpu_s *p; |
| struct task_struct *thread; |
| struct bnx2i_work *work, *tmp; |
| |
| /* Prevent any new work from being queued for this CPU */ |
| p = &per_cpu(bnx2i_percpu, cpu); |
| spin_lock_bh(&p->p_work_lock); |
| thread = p->iothread; |
| p->iothread = NULL; |
| |
| /* Free all work in the list */ |
| list_for_each_entry_safe(work, tmp, &p->work_list, list) { |
| list_del_init(&work->list); |
| bnx2i_process_scsi_cmd_resp(work->session, |
| work->bnx2i_conn, &work->cqe); |
| kfree(work); |
| } |
| |
| spin_unlock_bh(&p->p_work_lock); |
| if (thread) |
| kthread_stop(thread); |
| } |
| |
| |
| /** |
| * bnx2i_cpu_callback - Handler for CPU hotplug events |
| * |
| * @nfb: The callback data block |
| * @action: The event triggering the callback |
| * @hcpu: The index of the CPU that the event is for |
| * |
| * This creates or destroys per-CPU data for iSCSI |
| * |
| * Returns NOTIFY_OK always. |
| */ |
| static int bnx2i_cpu_callback(struct notifier_block *nfb, |
| unsigned long action, void *hcpu) |
| { |
| unsigned cpu = (unsigned long)hcpu; |
| |
| switch (action) { |
| case CPU_ONLINE: |
| case CPU_ONLINE_FROZEN: |
| printk(KERN_INFO "bnx2i: CPU %x online: Create Rx thread\n", |
| cpu); |
| bnx2i_percpu_thread_create(cpu); |
| break; |
| case CPU_DEAD: |
| case CPU_DEAD_FROZEN: |
| printk(KERN_INFO "CPU %x offline: Remove Rx thread\n", cpu); |
| bnx2i_percpu_thread_destroy(cpu); |
| break; |
| default: |
| break; |
| } |
| return NOTIFY_OK; |
| } |
| |
| |
| /** |
| * bnx2i_mod_init - module init entry point |
| * |
| * initialize any driver wide global data structures such as endpoint pool, |
| * tcp port manager/queue, sysfs. finally driver will register itself |
| * with the cnic module |
| */ |
| static int __init bnx2i_mod_init(void) |
| { |
| int err; |
| unsigned cpu = 0; |
| struct bnx2i_percpu_s *p; |
| |
| printk(KERN_INFO "%s", version); |
| |
| if (sq_size && !is_power_of_2(sq_size)) |
| sq_size = roundup_pow_of_two(sq_size); |
| |
| mutex_init(&bnx2i_dev_lock); |
| |
| bnx2i_scsi_xport_template = |
| iscsi_register_transport(&bnx2i_iscsi_transport); |
| if (!bnx2i_scsi_xport_template) { |
| printk(KERN_ERR "Could not register bnx2i transport.\n"); |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb); |
| if (err) { |
| printk(KERN_ERR "Could not register bnx2i cnic driver.\n"); |
| goto unreg_xport; |
| } |
| |
| /* Create percpu kernel threads to handle iSCSI I/O completions */ |
| for_each_possible_cpu(cpu) { |
| p = &per_cpu(bnx2i_percpu, cpu); |
| INIT_LIST_HEAD(&p->work_list); |
| spin_lock_init(&p->p_work_lock); |
| p->iothread = NULL; |
| } |
| |
| for_each_online_cpu(cpu) |
| bnx2i_percpu_thread_create(cpu); |
| |
| /* Initialize per CPU interrupt thread */ |
| register_hotcpu_notifier(&bnx2i_cpu_notifier); |
| |
| return 0; |
| |
| unreg_xport: |
| iscsi_unregister_transport(&bnx2i_iscsi_transport); |
| out: |
| return err; |
| } |
| |
| |
| /** |
| * bnx2i_mod_exit - module cleanup/exit entry point |
| * |
| * Global resource lock and host adapter lock is held during critical sections |
| * in this function. Driver will browse through the adapter list, cleans-up |
| * each instance, unregisters iscsi transport name and finally driver will |
| * unregister itself with the cnic module |
| */ |
| static void __exit bnx2i_mod_exit(void) |
| { |
| struct bnx2i_hba *hba; |
| unsigned cpu = 0; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| while (!list_empty(&adapter_list)) { |
| hba = list_entry(adapter_list.next, struct bnx2i_hba, link); |
| list_del(&hba->link); |
| adapter_count--; |
| |
| if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
| bnx2i_chip_cleanup(hba); |
| hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI); |
| clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| } |
| |
| bnx2i_free_hba(hba); |
| } |
| mutex_unlock(&bnx2i_dev_lock); |
| |
| unregister_hotcpu_notifier(&bnx2i_cpu_notifier); |
| |
| for_each_online_cpu(cpu) |
| bnx2i_percpu_thread_destroy(cpu); |
| |
| iscsi_unregister_transport(&bnx2i_iscsi_transport); |
| cnic_unregister_driver(CNIC_ULP_ISCSI); |
| } |
| |
| module_init(bnx2i_mod_init); |
| module_exit(bnx2i_mod_exit); |