/drivers/scsi/bnx2i/bnx2i_init.c
C | 445 lines | 247 code | 75 blank | 123 comment | 48 complexity | ab744234243ea8bd01dc2fd21fda690b MD5 | raw file
- /* 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 "2.1.0"
- #define DRV_MODULE_RELDATE "Dec 06, 2009"
- 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 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;
- /* 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.
- */
- wait_event_interruptible_timeout(hba->eh_wait,
- (hba->ofld_conns_active == 0),
- hba->hba_shutdown_tmo);
- /* 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);
- 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);
- } else
- hba->cnic = dev;
- }
- /**
- * 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);