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 "2.1.3"
21 #define DRV_MODULE_RELDATE "Aug 10, 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> and "
29 "Eddie Wai <eddie.wai@broadcom.com>");
31 MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711"
33 MODULE_LICENSE("GPL");
34 MODULE_VERSION(DRV_MODULE_VERSION);
36 static DEFINE_MUTEX(bnx2i_dev_lock);
38 unsigned int event_coal_min = 24;
39 module_param(event_coal_min, int, 0664);
40 MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands");
42 unsigned int event_coal_div = 1;
43 module_param(event_coal_div, int, 0664);
44 MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
46 unsigned int en_tcp_dack = 1;
47 module_param(en_tcp_dack, int, 0664);
48 MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
50 unsigned int error_mask1 = 0x00;
51 module_param(error_mask1, int, 0664);
52 MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
54 unsigned int error_mask2 = 0x00;
55 module_param(error_mask2, int, 0664);
56 MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
59 module_param(sq_size, int, 0664);
60 MODULE_PARM_DESC(sq_size, "Configure SQ size");
62 unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
63 module_param(rq_size, int, 0664);
64 MODULE_PARM_DESC(rq_size, "Configure RQ size");
66 u64 iscsi_error_mask = 0x00;
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_chip_cleanup - local routine to handle chip cleanup
171 * @hba: Adapter instance to register
173 * Driver checks if adapter still has any active connections before
174 * executing the cleanup process
176 static void bnx2i_chip_cleanup(struct bnx2i_hba *hba)
178 struct bnx2i_endpoint *bnx2i_ep;
179 struct list_head *pos, *tmp;
181 if (hba->ofld_conns_active) {
182 /* Stage to force the disconnection
183 * This is the case where the daemon is either slow or
186 printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active "
187 "connections\n", hba->netdev->name,
188 hba->ofld_conns_active);
189 mutex_lock(&hba->net_dev_lock);
190 list_for_each_safe(pos, tmp, &hba->ep_active_list) {
191 bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);
192 /* Clean up the chip only */
193 bnx2i_hw_ep_disconnect(bnx2i_ep);
194 bnx2i_ep->cm_sk = NULL;
196 mutex_unlock(&hba->net_dev_lock);
202 * bnx2i_stop - cnic callback to shutdown adapter instance
203 * @handle: transparent handle pointing to adapter structure
205 * driver checks if adapter is already in shutdown mode, if not start
206 * the shutdown process
208 void bnx2i_stop(void *handle)
210 struct bnx2i_hba *hba = handle;
213 /* check if cleanup happened in GOING_DOWN context */
214 if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
215 &hba->adapter_state))
216 iscsi_host_for_each_session(hba->shost,
219 /* Wait for all endpoints to be torn down, Chip will be reset once
220 * control returns to network driver. So it is required to cleanup and
221 * release all connection resources before returning from this routine.
223 while (hba->ofld_conns_active) {
224 conns_active = hba->ofld_conns_active;
225 wait_event_interruptible_timeout(hba->eh_wait,
226 (hba->ofld_conns_active != conns_active),
227 hba->hba_shutdown_tmo);
228 if (hba->ofld_conns_active == conns_active)
231 bnx2i_chip_cleanup(hba);
233 /* This flag should be cleared last so that ep_disconnect() gracefully
234 * cleans up connection context
236 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
240 * bnx2i_init_one - initialize an adapter instance and allocate memory resources
241 * @hba: bnx2i adapter instance
242 * @cnic: cnic device handle
244 * Global resource lock is held during critical sections below. This routine is
245 * called from either cnic_register_driver() or device hot plug context and
246 * and does majority of device specific initialization
248 static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
252 mutex_lock(&bnx2i_dev_lock);
254 rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
257 set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
258 list_add_tail(&hba->link, &adapter_list);
260 } else if (rc == -EBUSY) /* duplicate registration */
261 printk(KERN_ALERT "bnx2i, duplicate registration"
262 "hba=%p, cnic=%p\n", hba, cnic);
263 else if (rc == -EAGAIN)
264 printk(KERN_ERR "bnx2i, driver not registered\n");
265 else if (rc == -EINVAL)
266 printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
268 printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
270 mutex_unlock(&bnx2i_dev_lock);
277 * bnx2i_ulp_init - initialize an adapter instance
278 * @dev: cnic device handle
280 * Called from cnic_register_driver() context to initialize all enumerated
281 * cnic devices. This routine allocate adapter structure and other
282 * device specific resources.
284 void bnx2i_ulp_init(struct cnic_dev *dev)
286 struct bnx2i_hba *hba;
288 /* Allocate a HBA structure for this device */
289 hba = bnx2i_alloc_hba(dev);
291 printk(KERN_ERR "bnx2i init: hba initialization failed\n");
295 /* Get PCI related information and update hba struct members */
296 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
297 if (bnx2i_init_one(hba, dev)) {
298 printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
305 * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
306 * @dev: cnic device handle
309 void bnx2i_ulp_exit(struct cnic_dev *dev)
311 struct bnx2i_hba *hba;
313 hba = bnx2i_find_hba_for_cnic(dev);
315 printk(KERN_INFO "bnx2i_ulp_exit: hba not "
316 "found, dev 0x%p\n", dev);
319 mutex_lock(&bnx2i_dev_lock);
320 list_del_init(&hba->link);
323 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
324 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
325 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
327 mutex_unlock(&bnx2i_dev_lock);
334 * bnx2i_mod_init - module init entry point
336 * initialize any driver wide global data structures such as endpoint pool,
337 * tcp port manager/queue, sysfs. finally driver will register itself
338 * with the cnic module
340 static int __init bnx2i_mod_init(void)
344 printk(KERN_INFO "%s", version);
346 if (sq_size && !is_power_of_2(sq_size))
347 sq_size = roundup_pow_of_two(sq_size);
349 mutex_init(&bnx2i_dev_lock);
351 bnx2i_scsi_xport_template =
352 iscsi_register_transport(&bnx2i_iscsi_transport);
353 if (!bnx2i_scsi_xport_template) {
354 printk(KERN_ERR "Could not register bnx2i transport.\n");
359 err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
361 printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
368 iscsi_unregister_transport(&bnx2i_iscsi_transport);
375 * bnx2i_mod_exit - module cleanup/exit entry point
377 * Global resource lock and host adapter lock is held during critical sections
378 * in this function. Driver will browse through the adapter list, cleans-up
379 * each instance, unregisters iscsi transport name and finally driver will
380 * unregister itself with the cnic module
382 static void __exit bnx2i_mod_exit(void)
384 struct bnx2i_hba *hba;
386 mutex_lock(&bnx2i_dev_lock);
387 while (!list_empty(&adapter_list)) {
388 hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
389 list_del(&hba->link);
392 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
393 bnx2i_chip_cleanup(hba);
394 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
395 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
400 mutex_unlock(&bnx2i_dev_lock);
402 iscsi_unregister_transport(&bnx2i_iscsi_transport);
403 cnic_unregister_driver(CNIC_ULP_ISCSI);
406 module_init(bnx2i_mod_init);
407 module_exit(bnx2i_mod_exit);