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);