| /* bnx2i.c: Broadcom NetXtreme II iSCSI driver. |
| * |
| * Copyright (c) 2006 - 2009 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) |
| */ |
| |
| #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 "2.1.2" |
| #define DRV_MODULE_RELDATE "Jun 28, 2010" |
| |
| 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>"); |
| MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711" |
| " 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 = 1; |
| 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, int, 0664); |
| MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1"); |
| |
| unsigned int error_mask2 = 0x00; |
| module_param(error_mask2, int, 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; |
| |
| static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) ; |
| |
| |
| /** |
| * 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) |
| 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; |
| |
| bnx2i_send_fw_iscsi_init_msg(hba); |
| while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--) |
| msleep(BNX2I_INIT_POLL_TIME); |
| } |
| |
| |
| /** |
| * 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; |
| struct list_head *pos, *tmp; |
| struct bnx2i_endpoint *bnx2i_ep; |
| int conns_active; |
| |
| /* check if cleanup happened in GOING_DOWN context */ |
| if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN, |
| &hba->adapter_state)) |
| iscsi_host_for_each_session(hba->shost, |
| bnx2i_drop_session); |
| |
| /* 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), |
| hba->hba_shutdown_tmo); |
| if (hba->ofld_conns_active == conns_active) |
| break; |
| } |
| 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: Wait timeout, force all eps " |
| "to disconnect (%d)\n", 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); |
| } |
| mutex_unlock(&hba->net_dev_lock); |
| if (hba->ofld_conns_active) |
| printk(KERN_ERR "bnx2i: EP disconnect timeout (%d)!\n", |
| hba->ofld_conns_active); |
| } |
| |
| /* This flag should be cleared last so that ep_disconnect() gracefully |
| * cleans up connection context |
| */ |
| clear_bit(ADAPTER_STATE_UP, &hba->adapter_state); |
| } |
| |
| /** |
| * bnx2i_register_device - register bnx2i adapter instance with the cnic driver |
| * @hba: Adapter instance to register |
| * |
| * registers bnx2i adapter instance with the cnic driver while holding the |
| * adapter structure lock |
| */ |
| void bnx2i_register_device(struct bnx2i_hba *hba) |
| { |
| int rc; |
| |
| if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || |
| test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
| return; |
| } |
| |
| rc = hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba); |
| |
| if (!rc) |
| set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| } |
| |
| |
| /** |
| * bnx2i_reg_dev_all - registers all adapter instances with the cnic driver |
| * |
| * registers all bnx2i adapter instances with the cnic driver while holding |
| * the global resource lock |
| */ |
| void bnx2i_reg_dev_all(void) |
| { |
| struct bnx2i_hba *hba, *temp; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| list_for_each_entry_safe(hba, temp, &adapter_list, link) |
| bnx2i_register_device(hba); |
| mutex_unlock(&bnx2i_dev_lock); |
| } |
| |
| |
| /** |
| * bnx2i_unreg_one_device - unregister adapter instance with the cnic driver |
| * @hba: Adapter instance to unregister |
| * |
| * registers bnx2i adapter instance with the cnic driver while holding |
| * the adapter structure lock |
| */ |
| static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) |
| { |
| if (hba->ofld_conns_active || |
| !test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) || |
| test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) |
| return; |
| |
| hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI); |
| |
| /* ep_disconnect could come before NETDEV_DOWN, driver won't |
| * see NETDEV_DOWN as it already unregistered itself. |
| */ |
| hba->adapter_state = 0; |
| clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic); |
| } |
| |
| /** |
| * bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver |
| * |
| * unregisters all bnx2i adapter instances with the cnic driver while holding |
| * the global resource lock |
| */ |
| void bnx2i_unreg_dev_all(void) |
| { |
| struct bnx2i_hba *hba, *temp; |
| |
| mutex_lock(&bnx2i_dev_lock); |
| list_for_each_entry_safe(hba, temp, &adapter_list, link) |
| bnx2i_unreg_one_device(hba); |
| mutex_unlock(&bnx2i_dev_lock); |
| } |
| |
| |
| /** |
| * 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); |
| 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); |
| |
| 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_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; |
| |
| 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; |
| } |
| |
| 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; |
| |
| 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)) { |
| 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); |
| |
| iscsi_unregister_transport(&bnx2i_iscsi_transport); |
| cnic_unregister_driver(CNIC_ULP_ISCSI); |
| } |
| |
| module_init(bnx2i_mod_init); |
| module_exit(bnx2i_mod_exit); |