1 /* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
3 * Copyright (c) 2006 - 2010 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)
12 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
17 static struct list_head adapter_list
= LIST_HEAD_INIT(adapter_list
);
18 static u32 adapter_count
;
20 #define DRV_MODULE_NAME "bnx2i"
21 #define DRV_MODULE_VERSION "2.6.2.3"
22 #define DRV_MODULE_RELDATE "Dec 31, 2010"
24 static char version
[] __devinitdata
=
25 "Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
26 " v" DRV_MODULE_VERSION
" (" DRV_MODULE_RELDATE
")\n";
29 MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com> and "
30 "Eddie Wai <eddie.wai@broadcom.com>");
32 MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711/57712"
34 MODULE_LICENSE("GPL");
35 MODULE_VERSION(DRV_MODULE_VERSION
);
37 static DEFINE_MUTEX(bnx2i_dev_lock
);
39 unsigned int event_coal_min
= 24;
40 module_param(event_coal_min
, int, 0664);
41 MODULE_PARM_DESC(event_coal_min
, "Event Coalescing Minimum Commands");
43 unsigned int event_coal_div
= 1;
44 module_param(event_coal_div
, int, 0664);
45 MODULE_PARM_DESC(event_coal_div
, "Event Coalescing Divide Factor");
47 unsigned int en_tcp_dack
= 1;
48 module_param(en_tcp_dack
, int, 0664);
49 MODULE_PARM_DESC(en_tcp_dack
, "Enable TCP Delayed ACK");
51 unsigned int error_mask1
= 0x00;
52 module_param(error_mask1
, int, 0664);
53 MODULE_PARM_DESC(error_mask1
, "Config FW iSCSI Error Mask #1");
55 unsigned int error_mask2
= 0x00;
56 module_param(error_mask2
, int, 0664);
57 MODULE_PARM_DESC(error_mask2
, "Config FW iSCSI Error Mask #2");
60 module_param(sq_size
, int, 0664);
61 MODULE_PARM_DESC(sq_size
, "Configure SQ size");
63 unsigned int rq_size
= BNX2I_RQ_WQES_DEFAULT
;
64 module_param(rq_size
, int, 0664);
65 MODULE_PARM_DESC(rq_size
, "Configure RQ size");
67 u64 iscsi_error_mask
= 0x00;
71 * bnx2i_identify_device - identifies NetXtreme II device type
72 * @hba: Adapter structure pointer
74 * This function identifies the NX2 device type and sets appropriate
75 * queue mailbox register access method, 5709 requires driver to
76 * access MBOX regs using *bin* mode
78 void bnx2i_identify_device(struct bnx2i_hba
*hba
)
80 hba
->cnic_dev_type
= 0;
81 if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5706
) ||
82 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5706S
))
83 set_bit(BNX2I_NX2_DEV_5706
, &hba
->cnic_dev_type
);
84 else if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5708
) ||
85 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5708S
))
86 set_bit(BNX2I_NX2_DEV_5708
, &hba
->cnic_dev_type
);
87 else if ((hba
->pci_did
== PCI_DEVICE_ID_NX2_5709
) ||
88 (hba
->pci_did
== PCI_DEVICE_ID_NX2_5709S
)) {
89 set_bit(BNX2I_NX2_DEV_5709
, &hba
->cnic_dev_type
);
90 hba
->mail_queue_access
= BNX2I_MQ_BIN_MODE
;
91 } else if (hba
->pci_did
== PCI_DEVICE_ID_NX2_57710
||
92 hba
->pci_did
== PCI_DEVICE_ID_NX2_57711
||
93 hba
->pci_did
== PCI_DEVICE_ID_NX2_57711E
||
94 hba
->pci_did
== PCI_DEVICE_ID_NX2_57712
||
95 hba
->pci_did
== PCI_DEVICE_ID_NX2_57712E
)
96 set_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
);
98 printk(KERN_ALERT
"bnx2i: unknown device, 0x%x\n",
104 * get_adapter_list_head - returns head of adapter list
106 struct bnx2i_hba
*get_adapter_list_head(void)
108 struct bnx2i_hba
*hba
= NULL
;
109 struct bnx2i_hba
*tmp_hba
;
114 mutex_lock(&bnx2i_dev_lock
);
115 list_for_each_entry(tmp_hba
, &adapter_list
, link
) {
116 if (tmp_hba
->cnic
&& tmp_hba
->cnic
->cm_select_dev
) {
121 mutex_unlock(&bnx2i_dev_lock
);
128 * bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
129 * @cnic: pointer to cnic device instance
132 struct bnx2i_hba
*bnx2i_find_hba_for_cnic(struct cnic_dev
*cnic
)
134 struct bnx2i_hba
*hba
, *temp
;
136 mutex_lock(&bnx2i_dev_lock
);
137 list_for_each_entry_safe(hba
, temp
, &adapter_list
, link
) {
138 if (hba
->cnic
== cnic
) {
139 mutex_unlock(&bnx2i_dev_lock
);
143 mutex_unlock(&bnx2i_dev_lock
);
149 * bnx2i_start - cnic callback to initialize & start adapter instance
150 * @handle: transparent handle pointing to adapter structure
152 * This function maps adapter structure to pcidev structure and initiates
153 * firmware handshake to enable/initialize on chip iscsi components
154 * This bnx2i - cnic interface api callback is issued after following
155 * 2 conditions are met -
156 * a) underlying network interface is up (marked by event 'NETDEV_UP'
158 * b) bnx2i adapter instance is registered
160 void bnx2i_start(void *handle
)
162 #define BNX2I_INIT_POLL_TIME (1000 / HZ)
163 struct bnx2i_hba
*hba
= handle
;
166 if (!hba
->cnic
->max_iscsi_conn
) {
167 printk(KERN_ALERT
"bnx2i: dev %s does not support "
168 "iSCSI\n", hba
->netdev
->name
);
170 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
171 mutex_lock(&bnx2i_dev_lock
);
172 list_del_init(&hba
->link
);
174 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
175 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
176 mutex_unlock(&bnx2i_dev_lock
);
181 bnx2i_send_fw_iscsi_init_msg(hba
);
182 while (!test_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
) && i
--)
183 msleep(BNX2I_INIT_POLL_TIME
);
188 * bnx2i_chip_cleanup - local routine to handle chip cleanup
189 * @hba: Adapter instance to register
191 * Driver checks if adapter still has any active connections before
192 * executing the cleanup process
194 static void bnx2i_chip_cleanup(struct bnx2i_hba
*hba
)
196 struct bnx2i_endpoint
*bnx2i_ep
;
197 struct list_head
*pos
, *tmp
;
199 if (hba
->ofld_conns_active
) {
200 /* Stage to force the disconnection
201 * This is the case where the daemon is either slow or
204 printk(KERN_ALERT
"bnx2i: (%s) chip cleanup for %d active "
205 "connections\n", hba
->netdev
->name
,
206 hba
->ofld_conns_active
);
207 mutex_lock(&hba
->net_dev_lock
);
208 list_for_each_safe(pos
, tmp
, &hba
->ep_active_list
) {
209 bnx2i_ep
= list_entry(pos
, struct bnx2i_endpoint
, link
);
210 /* Clean up the chip only */
211 bnx2i_hw_ep_disconnect(bnx2i_ep
);
212 bnx2i_ep
->cm_sk
= NULL
;
214 mutex_unlock(&hba
->net_dev_lock
);
220 * bnx2i_stop - cnic callback to shutdown adapter instance
221 * @handle: transparent handle pointing to adapter structure
223 * driver checks if adapter is already in shutdown mode, if not start
224 * the shutdown process
226 void bnx2i_stop(void *handle
)
228 struct bnx2i_hba
*hba
= handle
;
230 int wait_delay
= 1 * HZ
;
232 /* check if cleanup happened in GOING_DOWN context */
233 if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN
,
234 &hba
->adapter_state
)) {
235 iscsi_host_for_each_session(hba
->shost
,
237 wait_delay
= hba
->hba_shutdown_tmo
;
239 /* Wait for inflight offload connection tasks to complete before
240 * proceeding. Forcefully terminate all connection recovery in
241 * progress at the earliest, either in bind(), send_pdu(LOGIN),
244 wait_event_interruptible_timeout(hba
->eh_wait
,
245 (list_empty(&hba
->ep_ofld_list
) &&
246 list_empty(&hba
->ep_destroy_list
)),
248 /* Wait for all endpoints to be torn down, Chip will be reset once
249 * control returns to network driver. So it is required to cleanup and
250 * release all connection resources before returning from this routine.
252 while (hba
->ofld_conns_active
) {
253 conns_active
= hba
->ofld_conns_active
;
254 wait_event_interruptible_timeout(hba
->eh_wait
,
255 (hba
->ofld_conns_active
!= conns_active
),
257 if (hba
->ofld_conns_active
== conns_active
)
260 bnx2i_chip_cleanup(hba
);
262 /* This flag should be cleared last so that ep_disconnect() gracefully
263 * cleans up connection context
265 clear_bit(ADAPTER_STATE_GOING_DOWN
, &hba
->adapter_state
);
266 clear_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
);
271 * bnx2i_init_one - initialize an adapter instance and allocate memory resources
272 * @hba: bnx2i adapter instance
273 * @cnic: cnic device handle
275 * Global resource lock is held during critical sections below. This routine is
276 * called from either cnic_register_driver() or device hot plug context and
277 * and does majority of device specific initialization
279 static int bnx2i_init_one(struct bnx2i_hba
*hba
, struct cnic_dev
*cnic
)
283 mutex_lock(&bnx2i_dev_lock
);
285 rc
= cnic
->register_device(cnic
, CNIC_ULP_ISCSI
, hba
);
288 set_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
289 list_add_tail(&hba
->link
, &adapter_list
);
291 } else if (rc
== -EBUSY
) /* duplicate registration */
292 printk(KERN_ALERT
"bnx2i, duplicate registration"
293 "hba=%p, cnic=%p\n", hba
, cnic
);
294 else if (rc
== -EAGAIN
)
295 printk(KERN_ERR
"bnx2i, driver not registered\n");
296 else if (rc
== -EINVAL
)
297 printk(KERN_ERR
"bnx2i, invalid type %d\n", CNIC_ULP_ISCSI
);
299 printk(KERN_ERR
"bnx2i dev reg, unknown error, %d\n", rc
);
301 mutex_unlock(&bnx2i_dev_lock
);
308 * bnx2i_ulp_init - initialize an adapter instance
309 * @dev: cnic device handle
311 * Called from cnic_register_driver() context to initialize all enumerated
312 * cnic devices. This routine allocate adapter structure and other
313 * device specific resources.
315 void bnx2i_ulp_init(struct cnic_dev
*dev
)
317 struct bnx2i_hba
*hba
;
319 /* Allocate a HBA structure for this device */
320 hba
= bnx2i_alloc_hba(dev
);
322 printk(KERN_ERR
"bnx2i init: hba initialization failed\n");
326 /* Get PCI related information and update hba struct members */
327 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
328 if (bnx2i_init_one(hba
, dev
)) {
329 printk(KERN_ERR
"bnx2i - hba %p init failed\n", hba
);
336 * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
337 * @dev: cnic device handle
340 void bnx2i_ulp_exit(struct cnic_dev
*dev
)
342 struct bnx2i_hba
*hba
;
344 hba
= bnx2i_find_hba_for_cnic(dev
);
346 printk(KERN_INFO
"bnx2i_ulp_exit: hba not "
347 "found, dev 0x%p\n", dev
);
350 mutex_lock(&bnx2i_dev_lock
);
351 list_del_init(&hba
->link
);
354 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
355 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
356 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
358 mutex_unlock(&bnx2i_dev_lock
);
365 * bnx2i_mod_init - module init entry point
367 * initialize any driver wide global data structures such as endpoint pool,
368 * tcp port manager/queue, sysfs. finally driver will register itself
369 * with the cnic module
371 static int __init
bnx2i_mod_init(void)
375 printk(KERN_INFO
"%s", version
);
377 if (sq_size
&& !is_power_of_2(sq_size
))
378 sq_size
= roundup_pow_of_two(sq_size
);
380 mutex_init(&bnx2i_dev_lock
);
382 bnx2i_scsi_xport_template
=
383 iscsi_register_transport(&bnx2i_iscsi_transport
);
384 if (!bnx2i_scsi_xport_template
) {
385 printk(KERN_ERR
"Could not register bnx2i transport.\n");
390 err
= cnic_register_driver(CNIC_ULP_ISCSI
, &bnx2i_cnic_cb
);
392 printk(KERN_ERR
"Could not register bnx2i cnic driver.\n");
399 iscsi_unregister_transport(&bnx2i_iscsi_transport
);
406 * bnx2i_mod_exit - module cleanup/exit entry point
408 * Global resource lock and host adapter lock is held during critical sections
409 * in this function. Driver will browse through the adapter list, cleans-up
410 * each instance, unregisters iscsi transport name and finally driver will
411 * unregister itself with the cnic module
413 static void __exit
bnx2i_mod_exit(void)
415 struct bnx2i_hba
*hba
;
417 mutex_lock(&bnx2i_dev_lock
);
418 while (!list_empty(&adapter_list
)) {
419 hba
= list_entry(adapter_list
.next
, struct bnx2i_hba
, link
);
420 list_del(&hba
->link
);
423 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
424 bnx2i_chip_cleanup(hba
);
425 hba
->cnic
->unregister_device(hba
->cnic
, CNIC_ULP_ISCSI
);
426 clear_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
);
431 mutex_unlock(&bnx2i_dev_lock
);
433 iscsi_unregister_transport(&bnx2i_iscsi_transport
);
434 cnic_unregister_driver(CNIC_ULP_ISCSI
);
437 module_init(bnx2i_mod_init
);
438 module_exit(bnx2i_mod_exit
);