[deliverable/linux.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	"2.0.1d"
#define DRV_MODULE_RELDATE	"Mar 25, 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_RWLOCK(bnx2i_dev_lock);

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)
		set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
}


/**
 * 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;

	read_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;
		}
	}
	read_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;

	read_lock(&bnx2i_dev_lock);
	list_for_each_entry_safe(hba, temp, &adapter_list, link) {
		if (hba->cnic == cnic) {
			read_unlock(&bnx2i_dev_lock);
			return hba;
		}
	}
	read_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 */
	clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
	if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
				&hba->adapter_state))
		iscsi_host_for_each_session(hba->shost,
					    bnx2i_drop_session);
}

/**
 * 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)
{
	if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
	    test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
		return;
	}

	hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);

	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;

	read_lock(&bnx2i_dev_lock);
	list_for_each_entry_safe(hba, temp, &adapter_list, link)
		bnx2i_register_device(hba);
	read_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;

	read_lock(&bnx2i_dev_lock);
	list_for_each_entry_safe(hba, temp, &adapter_list, link)
		bnx2i_unreg_one_device(hba);
	read_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 and host adapter lock is held during critical sections
 *	below. This routine is called from cnic_register_driver() context and
 *	work horse thread which does majority of device specific initialization
 */
static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
{
	int rc;

	read_lock(&bnx2i_dev_lock);
	if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
		rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
		if (rc)		/* duplicate registration */
			printk(KERN_ERR "bnx2i- dev reg failed\n");

		hba->age++;

		set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	}
	read_unlock(&bnx2i_dev_lock);

	write_lock(&bnx2i_dev_lock);
	list_add_tail(&hba->link, &adapter_list);
	adapter_count++;
	write_unlock(&bnx2i_dev_lock);
	return 0;
}


/**
 * 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;
	}
	write_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);
	}
	write_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 (!is_power_of_2(sq_size))
		sq_size = roundup_pow_of_two(sq_size);

	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;

	write_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);
		}

		write_unlock(&bnx2i_dev_lock);
		bnx2i_free_hba(hba);
		write_lock(&bnx2i_dev_lock);
	}
	write_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
	19	#define DRV_MODULE_NAME "bnx2i"
	20	#define DRV_MODULE_VERSION "2.0.1d"
	21	#define DRV_MODULE_RELDATE "Mar 25, 2009"
	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
	33	static DEFINE_RWLOCK(bnx2i_dev_lock);
	34
	35	unsigned int event_coal_div = 1;
	36	module_param(event_coal_div, int, 0664);
	37	MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
	38
	39	unsigned int en_tcp_dack = 1;
	40	module_param(en_tcp_dack, int, 0664);
	41	MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
	42
	43	unsigned int error_mask1 = 0x00;
	44	module_param(error_mask1, int, 0664);
	45	MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
	46
	47	unsigned int error_mask2 = 0x00;
	48	module_param(error_mask2, int, 0664);
	49	MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
	50
	51	unsigned int sq_size;
	52	module_param(sq_size, int, 0664);
	53	MODULE_PARM_DESC(sq_size, "Configure SQ size");
	54
	55	unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
	56	module_param(rq_size, int, 0664);
	57	MODULE_PARM_DESC(rq_size, "Configure RQ size");
	58
	59	u64 iscsi_error_mask = 0x00;
	60
	61	static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) ;
	62
	63
	64	/**
	65	* bnx2i_identify_device - identifies NetXtreme II device type
	66	* @hba: Adapter structure pointer
	67	*
	68	* This function identifies the NX2 device type and sets appropriate
	69	* queue mailbox register access method, 5709 requires driver to
	70	* access MBOX regs using bin mode
	71	*/
	72	void bnx2i_identify_device(struct bnx2i_hba *hba)
	73	{
	74	hba->cnic_dev_type = 0;
	75	if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) \|\|
	76	(hba->pci_did == PCI_DEVICE_ID_NX2_5706S))
	77	set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
	78	else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) \|\|
	79	(hba->pci_did == PCI_DEVICE_ID_NX2_5708S))
	80	set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
	81	else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) \|\|
82	(hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) {
83	set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
84	hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
85	} else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 \|\|
86	hba->pci_did == PCI_DEVICE_ID_NX2_57711)
87	set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
88	}
89
90
91	/**
92	* get_adapter_list_head - returns head of adapter list
93	*/
94	struct bnx2i_hba *get_adapter_list_head(void)
95	{
96	struct bnx2i_hba *hba = NULL;
97	struct bnx2i_hba *tmp_hba;
98
99	if (!adapter_count)
100	goto hba_not_found;
101
102	read_lock(&bnx2i_dev_lock);
103	list_for_each_entry(tmp_hba, &adapter_list, link) {
104	if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
105	hba = tmp_hba;
106	break;
107	}
108	}
109	read_unlock(&bnx2i_dev_lock);
110	hba_not_found:
111	return hba;
112	}
113
114
115	/**
116	* bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
117	* @cnic: pointer to cnic device instance
118	*
119	*/
120	struct bnx2i_hba bnx2i_find_hba_for_cnic(struct cnic_dev cnic)
121	{
122	struct bnx2i_hba hba, temp;
123
124	read_lock(&bnx2i_dev_lock);
125	list_for_each_entry_safe(hba, temp, &adapter_list, link) {
126	if (hba->cnic == cnic) {
127	read_unlock(&bnx2i_dev_lock);
128	return hba;
129	}
130	}
131	read_unlock(&bnx2i_dev_lock);
132	return NULL;
133	}
134
135
136	/**
137	* bnx2i_start - cnic callback to initialize & start adapter instance
138	* @handle: transparent handle pointing to adapter structure
139	*
140	* This function maps adapter structure to pcidev structure and initiates
141	* firmware handshake to enable/initialize on chip iscsi components
142	* This bnx2i - cnic interface api callback is issued after following
143	* 2 conditions are met -
144	* a) underlying network interface is up (marked by event 'NETDEV_UP'
145	* from netdev
146	* b) bnx2i adapter instance is registered
147	*/
148	void bnx2i_start(void *handle)
149	{
150	#define BNX2I_INIT_POLL_TIME (1000 / HZ)
151	struct bnx2i_hba *hba = handle;
152	int i = HZ;
153
154	bnx2i_send_fw_iscsi_init_msg(hba);
155	while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
156	msleep(BNX2I_INIT_POLL_TIME);
157	}
158
159
160	/**
161	* bnx2i_stop - cnic callback to shutdown adapter instance
162	* @handle: transparent handle pointing to adapter structure
163	*
164	* driver checks if adapter is already in shutdown mode, if not start
165	* the shutdown process
166	*/
167	void bnx2i_stop(void *handle)
168	{
169	struct bnx2i_hba *hba = handle;
170
171	/* check if cleanup happened in GOING_DOWN context */
172	clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
173	if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
174	&hba->adapter_state))
175	iscsi_host_for_each_session(hba->shost,
176	bnx2i_drop_session);
177	}
178
179	/**
180	* bnx2i_register_device - register bnx2i adapter instance with the cnic driver
181	* @hba: Adapter instance to register
182	*
183	* registers bnx2i adapter instance with the cnic driver while holding the
184	* adapter structure lock
185	*/
186	void bnx2i_register_device(struct bnx2i_hba *hba)
187	{
188	if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) \|\|
189	test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
190	return;
191	}
192
193	hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
194
cf4e6363 MC	195	set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	196	}
	197
	198
	199	/**
	200	* bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
	201	*
	202	* registers all bnx2i adapter instances with the cnic driver while holding
	203	* the global resource lock
	204	*/
	205	void bnx2i_reg_dev_all(void)
	206	{
	207	struct bnx2i_hba hba, temp;
	208
	209	read_lock(&bnx2i_dev_lock);
	210	list_for_each_entry_safe(hba, temp, &adapter_list, link)
	211	bnx2i_register_device(hba);
	212	read_unlock(&bnx2i_dev_lock);
	213	}
	214
	215
	216	/**
	217	* bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
	218	* @hba: Adapter instance to unregister
	219	*
	220	* registers bnx2i adapter instance with the cnic driver while holding
	221	* the adapter structure lock
	222	*/
	223	static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
	224	{
	225	if (hba->ofld_conns_active \|\|
	226	!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) \|\|
	227	test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state))
	228	return;
	229
	230	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
	231
cf4e6363 MC	232	/* ep_disconnect could come before NETDEV_DOWN, driver won't
	233	* see NETDEV_DOWN as it already unregistered itself.
	234	*/
	235	hba->adapter_state = 0;
	236	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	237	}
	238
	239	/**
	240	* bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
	241	*
	242	* unregisters all bnx2i adapter instances with the cnic driver while holding
	243	* the global resource lock
	244	*/
	245	void bnx2i_unreg_dev_all(void)
	246	{
	247	struct bnx2i_hba hba, temp;
	248
	249	read_lock(&bnx2i_dev_lock);
	250	list_for_each_entry_safe(hba, temp, &adapter_list, link)
	251	bnx2i_unreg_one_device(hba);
	252	read_unlock(&bnx2i_dev_lock);
	253	}
	254
	255
	256	/**
	257	* bnx2i_init_one - initialize an adapter instance and allocate memory resources
	258	* @hba: bnx2i adapter instance
	259	* @cnic: cnic device handle
	260	*
	261	* Global resource lock and host adapter lock is held during critical sections
	262	* below. This routine is called from cnic_register_driver() context and
	263	* work horse thread which does majority of device specific initialization
	264	*/
	265	static int bnx2i_init_one(struct bnx2i_hba hba, struct cnic_dev cnic)
	266	{
	267	int rc;
	268
	269	read_lock(&bnx2i_dev_lock);
1ed0f6a3	270	if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
cf4e6363 MC	271	rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
	272	if (rc) /* duplicate registration */
	273	printk(KERN_ERR "bnx2i- dev reg failed\n");
	274
cf4e6363	275	hba->age++;
cf4e6363 MC	276
	277	set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	278	}
	279	read_unlock(&bnx2i_dev_lock);
	280
	281	write_lock(&bnx2i_dev_lock);
	282	list_add_tail(&hba->link, &adapter_list);
	283	adapter_count++;
	284	write_unlock(&bnx2i_dev_lock);
	285	return 0;
	286	}
	287
	288
	289	/**
	290	* bnx2i_ulp_init - initialize an adapter instance
	291	* @dev: cnic device handle
	292	*
	293	* Called from cnic_register_driver() context to initialize all enumerated
	294	* cnic devices. This routine allocate adapter structure and other
	295	* device specific resources.
	296	*/
	297	void bnx2i_ulp_init(struct cnic_dev *dev)
	298	{
	299	struct bnx2i_hba *hba;
	300
	301	/* Allocate a HBA structure for this device */
	302	hba = bnx2i_alloc_hba(dev);
	303	if (!hba) {
	304	printk(KERN_ERR "bnx2i init: hba initialization failed\n");
	305	return;
	306	}
	307
	308	/* Get PCI related information and update hba struct members */
	309	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
	310	if (bnx2i_init_one(hba, dev)) {
	311	printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
	312	bnx2i_free_hba(hba);
	313	} else
	314	hba->cnic = dev;
	315	}
	316
	317
	318	/**
	319	* bnx2i_ulp_exit - shuts down adapter instance and frees all resources
	320	* @dev: cnic device handle
	321	*
	322	*/
	323	void bnx2i_ulp_exit(struct cnic_dev *dev)
	324	{
	325	struct bnx2i_hba *hba;
	326
	327	hba = bnx2i_find_hba_for_cnic(dev);
	328	if (!hba) {
	329	printk(KERN_INFO "bnx2i_ulp_exit: hba not "
	330	"found, dev 0x%p\n", dev);
	331	return;
	332	}
	333	write_lock(&bnx2i_dev_lock);
	334	list_del_init(&hba->link);
	335	adapter_count--;
	336
	337	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
	338	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
	339	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
cf4e6363 MC	340	}
	341	write_unlock(&bnx2i_dev_lock);
	342
	343	bnx2i_free_hba(hba);
	344	}
	345
	346
	347	/**
	348	* bnx2i_mod_init - module init entry point
	349	*
	350	* initialize any driver wide global data structures such as endpoint pool,
	351	* tcp port manager/queue, sysfs. finally driver will register itself
	352	* with the cnic module
	353	*/
	354	static int __init bnx2i_mod_init(void)
	355	{
	356	int err;
	357
	358	printk(KERN_INFO "%s", version);
	359
	360	if (!is_power_of_2(sq_size))
	361	sq_size = roundup_pow_of_two(sq_size);
	362
	363	bnx2i_scsi_xport_template =
	364	iscsi_register_transport(&bnx2i_iscsi_transport);
	365	if (!bnx2i_scsi_xport_template) {
	366	printk(KERN_ERR "Could not register bnx2i transport.\n");
	367	err = -ENOMEM;
	368	goto out;
	369	}
	370
	371	err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
	372	if (err) {
	373	printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
	374	goto unreg_xport;
	375	}
	376
	377	return 0;
	378
	379	unreg_xport:
	380	iscsi_unregister_transport(&bnx2i_iscsi_transport);
	381	out:
	382	return err;
	383	}
	384
	385
	386	/**
	387	* bnx2i_mod_exit - module cleanup/exit entry point
	388	*
	389	* Global resource lock and host adapter lock is held during critical sections
	390	* in this function. Driver will browse through the adapter list, cleans-up
	391	* each instance, unregisters iscsi transport name and finally driver will
	392	* unregister itself with the cnic module
	393	*/
	394	static void __exit bnx2i_mod_exit(void)
	395	{
	396	struct bnx2i_hba *hba;
	397
	398	write_lock(&bnx2i_dev_lock);
	399	while (!list_empty(&adapter_list)) {
	400	hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
	401	list_del(&hba->link);
	402	adapter_count--;
	403
404	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
405	hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
406	clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
cf4e6363 MC	407	}
	408
	409	write_unlock(&bnx2i_dev_lock);
	410	bnx2i_free_hba(hba);
	411	write_lock(&bnx2i_dev_lock);
	412	}
	413	write_unlock(&bnx2i_dev_lock);
	414
	415	iscsi_unregister_transport(&bnx2i_iscsi_transport);
	416	cnic_unregister_driver(CNIC_ULP_ISCSI);
	417	}
	418
	419	module_init(bnx2i_mod_init);
	420	module_exit(bnx2i_mod_exit);