[linux-2.6-block.git] / drivers / scsi / bnx2i / bnx2i_init.c

/* 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);
Commit	Line	Data
cf4e6363 MC	1	/* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
	2	*
	3	* Copyright (c) 2006 - 2009 Broadcom Corporation
	4	* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
	5	* Copyright (c) 2007, 2008 Mike Christie
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation.
	10	*
	11	* Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
	12	*/
	13
	14	#include "bnx2i.h"
	15
	16	static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
	17	static u32 adapter_count;
cf4e6363 MC	18
cf4e6363 MC	19	#define DRV_MODULE_NAME "bnx2i"
45ca38e7 AV	20	#define DRV_MODULE_VERSION "2.1.0"
45ca38e7 AV	21	#define DRV_MODULE_RELDATE "Dec 06, 2009"
cf4e6363 MC	22
	23	static char version[] __devinitdata =
	24	"Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
	25	" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
	26
	27
	28	MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com>");
	29	MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709 iSCSI Driver");
	30	MODULE_LICENSE("GPL");
	31	MODULE_VERSION(DRV_MODULE_VERSION);
	32
3be924fb	33	static DEFINE_MUTEX(bnx2i_dev_lock);
cf4e6363	34
8776193b AV	35	unsigned int event_coal_min = 24;
	36	module_param(event_coal_min, int, 0664);
	37	MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands");
	38
cf4e6363 MC	39	unsigned int event_coal_div = 1;
	40	module_param(event_coal_div, int, 0664);
	41	MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
	42
	43	unsigned int en_tcp_dack = 1;
	44	module_param(en_tcp_dack, int, 0664);
	45	MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
	46
	47	unsigned int error_mask1 = 0x00;
	48	module_param(error_mask1, int, 0664);
	49	MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
	50
	51	unsigned int error_mask2 = 0x00;
	52	module_param(error_mask2, int, 0664);
	53	MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
	54
	55	unsigned int sq_size;
	56	module_param(sq_size, int, 0664);
	57	MODULE_PARM_DESC(sq_size, "Configure SQ size");
	58
	59	unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
	60	module_param(rq_size, int, 0664);
	61	MODULE_PARM_DESC(rq_size, "Configure RQ size");
	62
	63	u64 iscsi_error_mask = 0x00;
	64
	65	static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) ;
	66
	67
	68	/**
	69	* bnx2i_identify_device - identifies NetXtreme II device type
	70	* @hba: Adapter structure pointer
	71	*
	72	* This function identifies the NX2 device type and sets appropriate
	73	* queue mailbox register access method, 5709 requires driver to
	74	* access MBOX regs using bin mode
	75	*/
	76	void bnx2i_identify_device(struct bnx2i_hba *hba)
	77	{
	78	hba->cnic_dev_type = 0;
	79	if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) \|\|
	80	(hba->pci_did == PCI_DEVICE_ID_NX2_5706S))
	81	set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
	82	else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) \|\|
	83	(hba->pci_did == PCI_DEVICE_ID_NX2_5708S))
	84	set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
	85	else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) \|\|
	86	(hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) {
	87	set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
	88	hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
	89	} else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 \|\|
5d9e1fa9 AV	90	hba->pci_did == PCI_DEVICE_ID_NX2_57711 \|\|
5d9e1fa9 AV	91	hba->pci_did == PCI_DEVICE_ID_NX2_57711E)
cf4e6363	92	set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
5d9e1fa9 AV	93	else
	94	printk(KERN_ALERT "bnx2i: unknown device, 0x%x\n",
	95	hba->pci_did);
cf4e6363 MC	96	}
	97
	98
	99	/**
	100	* get_adapter_list_head - returns head of adapter list
	101	*/
	102	struct bnx2i_hba *get_adapter_list_head(void)
	103	{
	104	struct bnx2i_hba *hba = NULL;
	105	struct bnx2i_hba *tmp_hba;
	106
	107	if (!adapter_count)
	108	goto hba_not_found;
	109
3be924fb	110	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	111	list_for_each_entry(tmp_hba, &adapter_list, link) {
	112	if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
	113	hba = tmp_hba;
	114	break;
	115	}
	116	}
3be924fb	117	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	118	hba_not_found:
	119	return hba;
	120	}
	121
	122
	123	/**
	124	* bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
	125	* @cnic: pointer to cnic device instance
	126	*
	127	*/
	128	struct bnx2i_hba bnx2i_find_hba_for_cnic(struct cnic_dev cnic)
	129	{
	130	struct bnx2i_hba hba, temp;
	131
3be924fb	132	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	133	list_for_each_entry_safe(hba, temp, &adapter_list, link) {
cf4e6363 MC	134	if (hba->cnic == cnic) {
3be924fb	135	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	136	return hba;
	137	}
	138	}
3be924fb	139	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	140	return NULL;
	141	}
	142
	143
	144	/**
	145	* bnx2i_start - cnic callback to initialize & start adapter instance
	146	* @handle: transparent handle pointing to adapter structure
	147	*
	148	* This function maps adapter structure to pcidev structure and initiates
	149	* firmware handshake to enable/initialize on chip iscsi components
	150	* This bnx2i - cnic interface api callback is issued after following
	151	* 2 conditions are met -
	152	* a) underlying network interface is up (marked by event 'NETDEV_UP'
	153	* from netdev
	154	* b) bnx2i adapter instance is registered
	155	*/
	156	void bnx2i_start(void *handle)
	157	{
	158	#define BNX2I_INIT_POLL_TIME (1000 / HZ)
	159	struct bnx2i_hba *hba = handle;
	160	int i = HZ;
	161
	162	bnx2i_send_fw_iscsi_init_msg(hba);
	163	while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
	164	msleep(BNX2I_INIT_POLL_TIME);
	165	}
	166
	167
	168	/**
	169	* bnx2i_stop - cnic callback to shutdown adapter instance
	170	* @handle: transparent handle pointing to adapter structure
	171	*
	172	* driver checks if adapter is already in shutdown mode, if not start
	173	* the shutdown process
	174	*/
	175	void bnx2i_stop(void *handle)
	176	{
	177	struct bnx2i_hba *hba = handle;
	178
	179	/* check if cleanup happened in GOING_DOWN context */
cf4e6363 MC	180	if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
	181	&hba->adapter_state))
	182	iscsi_host_for_each_session(hba->shost,
	183	bnx2i_drop_session);
490475a9 AV	184
	185	/* Wait for all endpoints to be torn down, Chip will be reset once
	186	* control returns to network driver. So it is required to cleanup and
	187	* release all connection resources before returning from this routine.
	188	*/
	189	wait_event_interruptible_timeout(hba->eh_wait,
	190	(hba->ofld_conns_active == 0),
	191	hba->hba_shutdown_tmo);
	192	/* This flag should be cleared last so that ep_disconnect() gracefully
	193	* cleans up connection context
	194	*/
	195	clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
cf4e6363 MC	196	}
	197
	198	/**
	199	* bnx2i_register_device - register bnx2i adapter instance with the cnic driver
	200	* @hba: Adapter instance to register
	201	*
	202	* registers bnx2i adapter instance with the cnic driver while holding the
	203	* adapter structure lock
	204	*/
	205	void bnx2i_register_device(struct bnx2i_hba *hba)
	206	{
fac3cc45 AV	207	int rc;
fac3cc45 AV	208
cf4e6363 MC	209	if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) \|\|
	210	test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
	211	return;
	212	}
	213
fac3cc45	214	rc = hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
cf4e6363	215
fac3cc45 AV	216	if (!rc)
fac3cc45 AV	217	set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
cf4e6363 MC	218	}
	219
	220
	221	/**
	222	* bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
	223	*
	224	* registers all bnx2i adapter instances with the cnic driver while holding
	225	* the global resource lock
	226	*/
	227	void bnx2i_reg_dev_all(void)
	228	{
	229	struct bnx2i_hba hba, temp;
	230
3be924fb	231	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	232	list_for_each_entry_safe(hba, temp, &adapter_list, link)
cf4e6363 MC	233	bnx2i_register_device(hba);
3be924fb	234	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	235	}
	236
	237
	238	/**
	239	* bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
	240	* @hba: Adapter instance to unregister
	241	*
	242	* registers bnx2i adapter instance with the cnic driver while holding
	243	* the adapter structure lock
	244	*/
	245	static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
	246	{
	247	if (hba->ofld_conns_active \|\|
	248	!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) \|\|
	249	test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state))
	250	return;
	251
	252	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
	253
cf4e6363 MC	254	/* ep_disconnect could come before NETDEV_DOWN, driver won't
	255	* see NETDEV_DOWN as it already unregistered itself.
	256	*/
	257	hba->adapter_state = 0;
	258	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	259	}
	260
	261	/**
	262	* bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
	263	*
	264	* unregisters all bnx2i adapter instances with the cnic driver while holding
	265	* the global resource lock
	266	*/
	267	void bnx2i_unreg_dev_all(void)
	268	{
	269	struct bnx2i_hba hba, temp;
	270
3be924fb	271	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	272	list_for_each_entry_safe(hba, temp, &adapter_list, link)
cf4e6363 MC	273	bnx2i_unreg_one_device(hba);
3be924fb	274	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	275	}
	276
	277
	278	/**
	279	* bnx2i_init_one - initialize an adapter instance and allocate memory resources
	280	* @hba: bnx2i adapter instance
	281	* @cnic: cnic device handle
	282	*
3be924fb AV	283	* Global resource lock is held during critical sections below. This routine is
	284	* called from either cnic_register_driver() or device hot plug context and
	285	* and does majority of device specific initialization
cf4e6363 MC	286	*/
	287	static int bnx2i_init_one(struct bnx2i_hba hba, struct cnic_dev cnic)
	288	{
	289	int rc;
	290
3be924fb	291	mutex_lock(&bnx2i_dev_lock);
4e85f151 AV	292	rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
4e85f151 AV	293	if (!rc) {
cf4e6363	294	hba->age++;
cf4e6363	295	set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
3be924fb AV	296	list_add_tail(&hba->link, &adapter_list);
3be924fb AV	297	adapter_count++;
4e85f151 AV	298	} else if (rc == -EBUSY) /* duplicate registration */
	299	printk(KERN_ALERT "bnx2i, duplicate registration"
	300	"hba=%p, cnic=%p\n", hba, cnic);
	301	else if (rc == -EAGAIN)
	302	printk(KERN_ERR "bnx2i, driver not registered\n");
	303	else if (rc == -EINVAL)
	304	printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
	305	else
	306	printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
cf4e6363	307
3be924fb	308	mutex_unlock(&bnx2i_dev_lock);
4e85f151 AV	309
4e85f151 AV	310	return rc;
cf4e6363 MC	311	}
	312
	313
	314	/**
	315	* bnx2i_ulp_init - initialize an adapter instance
	316	* @dev: cnic device handle
	317	*
	318	* Called from cnic_register_driver() context to initialize all enumerated
	319	* cnic devices. This routine allocate adapter structure and other
	320	* device specific resources.
	321	*/
	322	void bnx2i_ulp_init(struct cnic_dev *dev)
	323	{
	324	struct bnx2i_hba *hba;
	325
	326	/* Allocate a HBA structure for this device */
	327	hba = bnx2i_alloc_hba(dev);
	328	if (!hba) {
	329	printk(KERN_ERR "bnx2i init: hba initialization failed\n");
	330	return;
	331	}
	332
	333	/* Get PCI related information and update hba struct members */
	334	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	335	if (bnx2i_init_one(hba, dev)) {
	336	printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
	337	bnx2i_free_hba(hba);
	338	} else
	339	hba->cnic = dev;
	340	}
	341
	342
	343	/**
	344	* bnx2i_ulp_exit - shuts down adapter instance and frees all resources
	345	* @dev: cnic device handle
	346	*
	347	*/
	348	void bnx2i_ulp_exit(struct cnic_dev *dev)
	349	{
	350	struct bnx2i_hba *hba;
	351
	352	hba = bnx2i_find_hba_for_cnic(dev);
	353	if (!hba) {
	354	printk(KERN_INFO "bnx2i_ulp_exit: hba not "
	355	"found, dev 0x%p\n", dev);
	356	return;
	357	}
3be924fb	358	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	359	list_del_init(&hba->link);
	360	adapter_count--;
	361
	362	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
	363	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
	364	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
cf4e6363	365	}
3be924fb	366	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	367
	368	bnx2i_free_hba(hba);
	369	}
	370
	371
	372	/**
	373	* bnx2i_mod_init - module init entry point
	374	*
	375	* initialize any driver wide global data structures such as endpoint pool,
	376	* tcp port manager/queue, sysfs. finally driver will register itself
	377	* with the cnic module
	378	*/
	379	static int __init bnx2i_mod_init(void)
	380	{
	381	int err;
	382
	383	printk(KERN_INFO "%s", version);
	384
f8c9abe7	385	if (sq_size && !is_power_of_2(sq_size))
cf4e6363 MC	386	sq_size = roundup_pow_of_two(sq_size);
cf4e6363 MC	387
3be924fb AV	388	mutex_init(&bnx2i_dev_lock);
3be924fb AV	389
cf4e6363 MC	390	bnx2i_scsi_xport_template =
	391	iscsi_register_transport(&bnx2i_iscsi_transport);
	392	if (!bnx2i_scsi_xport_template) {
	393	printk(KERN_ERR "Could not register bnx2i transport.\n");
	394	err = -ENOMEM;
	395	goto out;
	396	}
	397
	398	err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
	399	if (err) {
	400	printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
	401	goto unreg_xport;
	402	}
	403
	404	return 0;
	405
	406	unreg_xport:
	407	iscsi_unregister_transport(&bnx2i_iscsi_transport);
	408	out:
	409	return err;
	410	}
	411
	412
	413	/**
	414	* bnx2i_mod_exit - module cleanup/exit entry point
	415	*
	416	* Global resource lock and host adapter lock is held during critical sections
	417	* in this function. Driver will browse through the adapter list, cleans-up
	418	* each instance, unregisters iscsi transport name and finally driver will
	419	* unregister itself with the cnic module
	420	*/
	421	static void __exit bnx2i_mod_exit(void)
	422	{
	423	struct bnx2i_hba *hba;
	424
3be924fb	425	mutex_lock(&bnx2i_dev_lock);
cf4e6363 MC	426	while (!list_empty(&adapter_list)) {
	427	hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
	428	list_del(&hba->link);
	429	adapter_count--;
	430
	431	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
	432	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
	433	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
cf4e6363 MC	434	}
cf4e6363 MC	435
cf4e6363	436	bnx2i_free_hba(hba);
cf4e6363	437	}
3be924fb	438	mutex_unlock(&bnx2i_dev_lock);
cf4e6363 MC	439
	440	iscsi_unregister_transport(&bnx2i_iscsi_transport);
	441	cnic_unregister_driver(CNIC_ULP_ISCSI);
	442	}
	443
	444	module_init(bnx2i_mod_init);
	445	module_exit(bnx2i_mod_exit);