/* bnx2i.c: Broadcom NetXtreme II iSCSI driver. | |
* | |
* Copyright (c) 2006 - 2008 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) | |
* Maintain 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 "2.0.1e-05" | |
#define DRV_MODULE_RELDATE "Dec 16, 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> and Eddie Wai <eddie.wai@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_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 = 0; | |
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) ; | |
#ifdef _BNX2I_IOCTL_ | |
extern int bnx2i_ioctl_init(void); | |
extern void bnx2i_ioctl_cleanup(void); | |
#endif | |
/** | |
* 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); | |
} | |
/** | |
* bnx2i_get_tcp_port_requirements - returns num tcp ports to alloc/bind | |
* | |
* driver returns the number of TCP ports to be allocated/bound by 'bnx2id' | |
* daemon. Return value of '0' means driver has everything to support | |
* max iscsi connections on enumerated NX2 devices | |
*/ | |
int bnx2i_get_tcp_port_requirements(void) | |
{ | |
struct bnx2i_hba *hba, *temp; | |
int count = 0; | |
mutex_lock(&bnx2i_dev_lock); | |
list_for_each_entry_safe(hba, temp, &adapter_list, link) | |
count += hba->max_active_conns; | |
mutex_unlock(&bnx2i_dev_lock); | |
return count; | |
} | |
/** | |
* 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 */ | |
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) | |
{ | |
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 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; | |
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); | |
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; | |
} | |
#ifdef _BNX2I_IOCTL_ | |
bnx2i_ioctl_init(); | |
#endif | |
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); | |
#ifdef _BNX2I_IOCTL_ | |
bnx2i_ioctl_cleanup(); | |
#endif | |
} | |
module_init(bnx2i_mod_init); | |
module_exit(bnx2i_mod_exit); |