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 "2.1.1"
21 #define DRV_MODULE_RELDATE "Mar 24, 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;
180 /* check if cleanup happened in GOING_DOWN context */
181 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
182 if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
183 &hba->adapter_state))
184 iscsi_host_for_each_session(hba->shost,
189 * bnx2i_register_device - register bnx2i adapter instance with the cnic driver
190 * @hba: Adapter instance to register
192 * registers bnx2i adapter instance with the cnic driver while holding the
193 * adapter structure lock
195 void bnx2i_register_device(struct bnx2i_hba *hba)
199 if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
200 test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
204 rc = hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
207 set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
212 * bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
214 * registers all bnx2i adapter instances with the cnic driver while holding
215 * the global resource lock
217 void bnx2i_reg_dev_all(void)
219 struct bnx2i_hba *hba, *temp;
221 mutex_lock(&bnx2i_dev_lock);
222 list_for_each_entry_safe(hba, temp, &adapter_list, link)
223 bnx2i_register_device(hba);
224 mutex_unlock(&bnx2i_dev_lock);
229 * bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
230 * @hba: Adapter instance to unregister
232 * registers bnx2i adapter instance with the cnic driver while holding
233 * the adapter structure lock
235 static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
237 if (hba->ofld_conns_active ||
238 !test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) ||
239 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state))
242 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
244 /* ep_disconnect could come before NETDEV_DOWN, driver won't
245 * see NETDEV_DOWN as it already unregistered itself.
247 hba->adapter_state = 0;
248 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
252 * bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
254 * unregisters all bnx2i adapter instances with the cnic driver while holding
255 * the global resource lock
257 void bnx2i_unreg_dev_all(void)
259 struct bnx2i_hba *hba, *temp;
261 mutex_lock(&bnx2i_dev_lock);
262 list_for_each_entry_safe(hba, temp, &adapter_list, link)
263 bnx2i_unreg_one_device(hba);
264 mutex_unlock(&bnx2i_dev_lock);
269 * bnx2i_init_one - initialize an adapter instance and allocate memory resources
270 * @hba: bnx2i adapter instance
271 * @cnic: cnic device handle
273 * Global resource lock is held during critical sections below. This routine is
274 * called from either cnic_register_driver() or device hot plug context and
275 * and does majority of device specific initialization
277 static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
281 mutex_lock(&bnx2i_dev_lock);
283 rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
286 set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
287 list_add_tail(&hba->link, &adapter_list);
289 } else if (rc == -EBUSY) /* duplicate registration */
290 printk(KERN_ALERT "bnx2i, duplicate registration"
291 "hba=%p, cnic=%p\n", hba, cnic);
292 else if (rc == -EAGAIN)
293 printk(KERN_ERR "bnx2i, driver not registered\n");
294 else if (rc == -EINVAL)
295 printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
297 printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
299 mutex_unlock(&bnx2i_dev_lock);
306 * bnx2i_ulp_init - initialize an adapter instance
307 * @dev: cnic device handle
309 * Called from cnic_register_driver() context to initialize all enumerated
310 * cnic devices. This routine allocate adapter structure and other
311 * device specific resources.
313 void bnx2i_ulp_init(struct cnic_dev *dev)
315 struct bnx2i_hba *hba;
317 /* Allocate a HBA structure for this device */
318 hba = bnx2i_alloc_hba(dev);
320 printk(KERN_ERR "bnx2i init: hba initialization failed\n");
324 /* Get PCI related information and update hba struct members */
325 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
326 if (bnx2i_init_one(hba, dev)) {
327 printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
334 * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
335 * @dev: cnic device handle
338 void bnx2i_ulp_exit(struct cnic_dev *dev)
340 struct bnx2i_hba *hba;
342 hba = bnx2i_find_hba_for_cnic(dev);
344 printk(KERN_INFO "bnx2i_ulp_exit: hba not "
345 "found, dev 0x%p\n", dev);
348 mutex_lock(&bnx2i_dev_lock);
349 list_del_init(&hba->link);
352 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
353 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
354 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
356 mutex_unlock(&bnx2i_dev_lock);
363 * bnx2i_mod_init - module init entry point
365 * initialize any driver wide global data structures such as endpoint pool,
366 * tcp port manager/queue, sysfs. finally driver will register itself
367 * with the cnic module
369 static int __init bnx2i_mod_init(void)
373 printk(KERN_INFO "%s", version);
375 if (sq_size && !is_power_of_2(sq_size))
376 sq_size = roundup_pow_of_two(sq_size);
378 mutex_init(&bnx2i_dev_lock);
380 bnx2i_scsi_xport_template =
381 iscsi_register_transport(&bnx2i_iscsi_transport);
382 if (!bnx2i_scsi_xport_template) {
383 printk(KERN_ERR "Could not register bnx2i transport.\n");
388 err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
390 printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
397 iscsi_unregister_transport(&bnx2i_iscsi_transport);
404 * bnx2i_mod_exit - module cleanup/exit entry point
406 * Global resource lock and host adapter lock is held during critical sections
407 * in this function. Driver will browse through the adapter list, cleans-up
408 * each instance, unregisters iscsi transport name and finally driver will
409 * unregister itself with the cnic module
411 static void __exit bnx2i_mod_exit(void)
413 struct bnx2i_hba *hba;
415 mutex_lock(&bnx2i_dev_lock);
416 while (!list_empty(&adapter_list)) {
417 hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
418 list_del(&hba->link);
421 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
422 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
423 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
428 mutex_unlock(&bnx2i_dev_lock);
430 iscsi_unregister_transport(&bnx2i_iscsi_transport);
431 cnic_unregister_driver(CNIC_ULP_ISCSI);
434 module_init(bnx2i_mod_init);
435 module_exit(bnx2i_mod_exit);