1 /* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
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
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.
11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
16 static struct list_head adapter_list
= LIST_HEAD_INIT(adapter_list
);
17 static u32 adapter_count
;
19 #define DRV_MODULE_NAME "bnx2i"
20 #define DRV_MODULE_VERSION "2.1.2"
21 #define DRV_MODULE_RELDATE "Jun 28, 2010"
23 static char version
[] __devinitdata
=
24 "Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
25 " v" DRV_MODULE_VERSION
" (" DRV_MODULE_RELDATE
")\n";
28 MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com>");
29 MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711"
31 MODULE_LICENSE("GPL");
32 MODULE_VERSION(DRV_MODULE_VERSION
);
34 static DEFINE_MUTEX(bnx2i_dev_lock
);
36 unsigned int event_coal_min
= 24;
37 module_param(event_coal_min
, int, 0664);
38 MODULE_PARM_DESC(event_coal_min
, "Event Coalescing Minimum Commands");
40 unsigned int event_coal_div
= 1;
41 module_param(event_coal_div
, int, 0664);
42 MODULE_PARM_DESC(event_coal_div
, "Event Coalescing Divide Factor");
44 unsigned int en_tcp_dack
= 1;
45 module_param(en_tcp_dack
, int, 0664);
46 MODULE_PARM_DESC(en_tcp_dack
, "Enable TCP Delayed ACK");
48 unsigned int error_mask1
= 0x00;
49 module_param(error_mask1
, int, 0664);
50 MODULE_PARM_DESC(error_mask1
, "Config FW iSCSI Error Mask #1");
52 unsigned int error_mask2
= 0x00;
53 module_param(error_mask2
, int, 0664);
54 MODULE_PARM_DESC(error_mask2
, "Config FW iSCSI Error Mask #2");
57 module_param(sq_size
, int, 0664);
58 MODULE_PARM_DESC(sq_size
, "Configure SQ size");
60 unsigned int rq_size
= BNX2I_RQ_WQES_DEFAULT
;
61 module_param(rq_size
, int, 0664);
62 MODULE_PARM_DESC(rq_size
, "Configure RQ size");
64 u64 iscsi_error_mask
= 0x00;
66 static void bnx2i_unreg_one_device(struct bnx2i_hba
*hba
) ;
70 * bnx2i_identify_device - identifies NetXtreme II device type
71 * @hba: Adapter structure pointer
73 * This function identifies the NX2 device type and sets appropriate
74 * queue mailbox register access method, 5709 requires driver to
75 * access MBOX regs using *bin* mode
77 void bnx2i_identify_device(struct bnx2i_hba
*hba
)
79 hba
->cnic_dev_type
= 0;
80 if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5706
) ||
81 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5706S
))
82 set_bit(BNX2I_NX2_DEV_5706
, &hba
->cnic_dev_type
);
83 else if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5708
) ||
84 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5708S
))
85 set_bit(BNX2I_NX2_DEV_5708
, &hba
->cnic_dev_type
);
86 else if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5709
) ||
87 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5709S
)) {
88 set_bit(BNX2I_NX2_DEV_5709
, &hba
->cnic_dev_type
);
89 hba
->mail_queue_access
= BNX2I_MQ_BIN_MODE
;
90 } else if (hba
->pci_did
== PCI_DEVICE_ID_NX2_57710
||
91 hba
->pci_did
== PCI_DEVICE_ID_NX2_57711
||
92 hba
->pci_did
== PCI_DEVICE_ID_NX2_57711E
)
93 set_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
);
95 printk(KERN_ALERT
"bnx2i: unknown device, 0x%x\n",
101 * get_adapter_list_head - returns head of adapter list
103 struct bnx2i_hba
*get_adapter_list_head(void)
105 struct bnx2i_hba
*hba
= NULL
;
106 struct bnx2i_hba
*tmp_hba
;
111 mutex_lock(&bnx2i_dev_lock
);
112 list_for_each_entry(tmp_hba
, &adapter_list
, link
) {
113 if (tmp_hba
->cnic
&& tmp_hba
->cnic
->cm_select_dev
) {
118 mutex_unlock(&bnx2i_dev_lock
);
125 * bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
126 * @cnic: pointer to cnic device instance
129 struct bnx2i_hba
*bnx2i_find_hba_for_cnic(struct cnic_dev
*cnic
)
131 struct bnx2i_hba
*hba
, *temp
;
133 mutex_lock(&bnx2i_dev_lock
);
134 list_for_each_entry_safe(hba
, temp
, &adapter_list
, link
) {
135 if (hba
->cnic
== cnic
) {
136 mutex_unlock(&bnx2i_dev_lock
);
140 mutex_unlock(&bnx2i_dev_lock
);
146 * bnx2i_start - cnic callback to initialize & start adapter instance
147 * @handle: transparent handle pointing to adapter structure
149 * This function maps adapter structure to pcidev structure and initiates
150 * firmware handshake to enable/initialize on chip iscsi components
151 * This bnx2i - cnic interface api callback is issued after following
152 * 2 conditions are met -
153 * a) underlying network interface is up (marked by event 'NETDEV_UP'
155 * b) bnx2i adapter instance is registered
157 void bnx2i_start(void *handle
)
159 #define BNX2I_INIT_POLL_TIME (1000 / HZ)
160 struct bnx2i_hba
*hba
= handle
;
163 bnx2i_send_fw_iscsi_init_msg(hba
);
164 while (!test_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
) && i
--)
165 msleep(BNX2I_INIT_POLL_TIME
);
170 * bnx2i_stop - cnic callback to shutdown adapter instance
171 * @handle: transparent handle pointing to adapter structure
173 * driver checks if adapter is already in shutdown mode, if not start
174 * the shutdown process
176 void bnx2i_stop(void *handle
)
178 struct bnx2i_hba
*hba
= handle
;
179 struct list_head
*pos
, *tmp
;
180 struct bnx2i_endpoint
*bnx2i_ep
;
183 /* check if cleanup happened in GOING_DOWN context */
184 if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN
,
185 &hba
->adapter_state
))
186 iscsi_host_for_each_session(hba
->shost
,
189 /* Wait for all endpoints to be torn down, Chip will be reset once
190 * control returns to network driver. So it is required to cleanup and
191 * release all connection resources before returning from this routine.
193 while (hba
->ofld_conns_active
) {
194 conns_active
= hba
->ofld_conns_active
;
195 wait_event_interruptible_timeout(hba
->eh_wait
,
196 (hba
->ofld_conns_active
!= conns_active
),
197 hba
->hba_shutdown_tmo
);
198 if (hba
->ofld_conns_active
== conns_active
)
201 if (hba
->ofld_conns_active
) {
202 /* Stage to force the disconnection
203 * This is the case where the daemon is either slow or
206 printk(KERN_ALERT
"bnx2i: Wait timeout, force all eps "
207 "to disconnect (%d)\n", hba
->ofld_conns_active
);
208 mutex_lock(&hba
->net_dev_lock
);
209 list_for_each_safe(pos
, tmp
, &hba
->ep_active_list
) {
210 bnx2i_ep
= list_entry(pos
, struct bnx2i_endpoint
, link
);
211 /* Clean up the chip only */
212 bnx2i_hw_ep_disconnect(bnx2i_ep
);
214 mutex_unlock(&hba
->net_dev_lock
);
215 if (hba
->ofld_conns_active
)
216 printk(KERN_ERR
"bnx2i: EP disconnect timeout (%d)!\n",
217 hba
->ofld_conns_active
);
220 /* This flag should be cleared last so that ep_disconnect() gracefully
221 * cleans up connection context
223 clear_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
);
227 * bnx2i_register_device - register bnx2i adapter instance with the cnic driver
228 * @hba: Adapter instance to register
230 * registers bnx2i adapter instance with the cnic driver while holding the
231 * adapter structure lock
233 void bnx2i_register_device(struct bnx2i_hba
*hba
)
237 if (test_bit(ADAPTER_STATE_GOING_DOWN
, &hba
->adapter_state
) ||
238 test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
242 rc
= hba
->cnic
->register_device(hba
->cnic
, CNIC_ULP_ISCSI
, hba
);
245 set_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
250 * bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
252 * registers all bnx2i adapter instances with the cnic driver while holding
253 * the global resource lock
255 void bnx2i_reg_dev_all(void)
257 struct bnx2i_hba
*hba
, *temp
;
259 mutex_lock(&bnx2i_dev_lock
);
260 list_for_each_entry_safe(hba
, temp
, &adapter_list
, link
)
261 bnx2i_register_device(hba
);
262 mutex_unlock(&bnx2i_dev_lock
);
267 * bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
268 * @hba: Adapter instance to unregister
270 * registers bnx2i adapter instance with the cnic driver while holding
271 * the adapter structure lock
273 static void bnx2i_unreg_one_device(struct bnx2i_hba
*hba
)
275 if (hba
->ofld_conns_active
||
276 !test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
) ||
277 test_bit(ADAPTER_STATE_GOING_DOWN
, &hba
->adapter_state
))
280 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
282 /* ep_disconnect could come before NETDEV_DOWN, driver won't
283 * see NETDEV_DOWN as it already unregistered itself.
285 hba
->adapter_state
= 0;
286 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
290 * bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
292 * unregisters all bnx2i adapter instances with the cnic driver while holding
293 * the global resource lock
295 void bnx2i_unreg_dev_all(void)
297 struct bnx2i_hba
*hba
, *temp
;
299 mutex_lock(&bnx2i_dev_lock
);
300 list_for_each_entry_safe(hba
, temp
, &adapter_list
, link
)
301 bnx2i_unreg_one_device(hba
);
302 mutex_unlock(&bnx2i_dev_lock
);
307 * bnx2i_init_one - initialize an adapter instance and allocate memory resources
308 * @hba: bnx2i adapter instance
309 * @cnic: cnic device handle
311 * Global resource lock is held during critical sections below. This routine is
312 * called from either cnic_register_driver() or device hot plug context and
313 * and does majority of device specific initialization
315 static int bnx2i_init_one(struct bnx2i_hba
*hba
, struct cnic_dev
*cnic
)
319 mutex_lock(&bnx2i_dev_lock
);
321 rc
= cnic
->register_device(cnic
, CNIC_ULP_ISCSI
, hba
);
324 set_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
325 list_add_tail(&hba
->link
, &adapter_list
);
327 } else if (rc
== -EBUSY
) /* duplicate registration */
328 printk(KERN_ALERT
"bnx2i, duplicate registration"
329 "hba=%p, cnic=%p\n", hba
, cnic
);
330 else if (rc
== -EAGAIN
)
331 printk(KERN_ERR
"bnx2i, driver not registered\n");
332 else if (rc
== -EINVAL
)
333 printk(KERN_ERR
"bnx2i, invalid type %d\n", CNIC_ULP_ISCSI
);
335 printk(KERN_ERR
"bnx2i dev reg, unknown error, %d\n", rc
);
337 mutex_unlock(&bnx2i_dev_lock
);
344 * bnx2i_ulp_init - initialize an adapter instance
345 * @dev: cnic device handle
347 * Called from cnic_register_driver() context to initialize all enumerated
348 * cnic devices. This routine allocate adapter structure and other
349 * device specific resources.
351 void bnx2i_ulp_init(struct cnic_dev
*dev
)
353 struct bnx2i_hba
*hba
;
355 /* Allocate a HBA structure for this device */
356 hba
= bnx2i_alloc_hba(dev
);
358 printk(KERN_ERR
"bnx2i init: hba initialization failed\n");
362 /* Get PCI related information and update hba struct members */
363 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
364 if (bnx2i_init_one(hba
, dev
)) {
365 printk(KERN_ERR
"bnx2i - hba %p init failed\n", hba
);
372 * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
373 * @dev: cnic device handle
376 void bnx2i_ulp_exit(struct cnic_dev
*dev
)
378 struct bnx2i_hba
*hba
;
380 hba
= bnx2i_find_hba_for_cnic(dev
);
382 printk(KERN_INFO
"bnx2i_ulp_exit: hba not "
383 "found, dev 0x%p\n", dev
);
386 mutex_lock(&bnx2i_dev_lock
);
387 list_del_init(&hba
->link
);
390 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
391 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
392 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
394 mutex_unlock(&bnx2i_dev_lock
);
401 * bnx2i_mod_init - module init entry point
403 * initialize any driver wide global data structures such as endpoint pool,
404 * tcp port manager/queue, sysfs. finally driver will register itself
405 * with the cnic module
407 static int __init
bnx2i_mod_init(void)
411 printk(KERN_INFO
"%s", version
);
413 if (sq_size
&& !is_power_of_2(sq_size
))
414 sq_size
= roundup_pow_of_two(sq_size
);
416 mutex_init(&bnx2i_dev_lock
);
418 bnx2i_scsi_xport_template
=
419 iscsi_register_transport(&bnx2i_iscsi_transport
);
420 if (!bnx2i_scsi_xport_template
) {
421 printk(KERN_ERR
"Could not register bnx2i transport.\n");
426 err
= cnic_register_driver(CNIC_ULP_ISCSI
, &bnx2i_cnic_cb
);
428 printk(KERN_ERR
"Could not register bnx2i cnic driver.\n");
435 iscsi_unregister_transport(&bnx2i_iscsi_transport
);
442 * bnx2i_mod_exit - module cleanup/exit entry point
444 * Global resource lock and host adapter lock is held during critical sections
445 * in this function. Driver will browse through the adapter list, cleans-up
446 * each instance, unregisters iscsi transport name and finally driver will
447 * unregister itself with the cnic module
449 static void __exit
bnx2i_mod_exit(void)
451 struct bnx2i_hba
*hba
;
453 mutex_lock(&bnx2i_dev_lock
);
454 while (!list_empty(&adapter_list
)) {
455 hba
= list_entry(adapter_list
.next
, struct bnx2i_hba
, link
);
456 list_del(&hba
->link
);
459 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
460 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
461 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
466 mutex_unlock(&bnx2i_dev_lock
);
468 iscsi_unregister_transport(&bnx2i_iscsi_transport
);
469 cnic_unregister_driver(CNIC_ULP_ISCSI
);
472 module_init(bnx2i_mod_init
);
473 module_exit(bnx2i_mod_exit
);