Pull dock-bay into release branch
[linux-2.6] / drivers / scsi / qla2xxx / qla_mid.c
1 /*
2  *                  QLOGIC LINUX SOFTWARE
3  *
4  * QLogic ISP2x00 device driver for Linux 2.6.x
5  * Copyright (C) 2003-2005 QLogic Corporation
6  * (www.qlogic.com)
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2, or (at your option) any
11  * later version.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  */
19 #include "qla_def.h"
20
21 #include <linux/version.h>
22 #include <linux/moduleparam.h>
23 #include <linux/vmalloc.h>
24 #include <linux/smp_lock.h>
25 #include <linux/list.h>
26
27 #include <scsi/scsi_tcq.h>
28 #include <scsi/scsicam.h>
29 #include <linux/delay.h>
30
31 void qla2x00_vp_stop_timer(scsi_qla_host_t *);
32
33 void
34 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
35 {
36         if (vha->parent && vha->timer_active) {
37                 del_timer_sync(&vha->timer);
38                 vha->timer_active = 0;
39         }
40 }
41
42 uint32_t
43 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
44 {
45         uint32_t vp_id;
46         scsi_qla_host_t *ha = vha->parent;
47
48         /* Find an empty slot and assign an vp_id */
49         down(&ha->vport_sem);
50         vp_id = find_first_zero_bit((unsigned long *)ha->vp_idx_map,
51                                 MAX_MULTI_ID_FABRIC);
52         if (vp_id > MAX_MULTI_ID_FABRIC) {
53                 DEBUG15(printk ("vp_id %d is bigger than MAX_MULTI_ID_FABRID\n",
54                     vp_id));
55                 up(&ha->vport_sem);
56                 return vp_id;
57         }
58
59         set_bit(vp_id, (unsigned long *)ha->vp_idx_map);
60         ha->num_vhosts++;
61         vha->vp_idx = vp_id;
62         list_add_tail(&vha->vp_list, &ha->vp_list);
63         up(&ha->vport_sem);
64         return vp_id;
65 }
66
67 void
68 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
69 {
70         uint16_t vp_id;
71         scsi_qla_host_t *ha = vha->parent;
72
73         down(&ha->vport_sem);
74         vp_id = vha->vp_idx;
75         ha->num_vhosts--;
76         clear_bit(vp_id, (unsigned long *)ha->vp_idx_map);
77         list_del(&vha->vp_list);
78         up(&ha->vport_sem);
79 }
80
81 scsi_qla_host_t *
82 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
83 {
84         scsi_qla_host_t *vha;
85
86         /* Locate matching device in database. */
87         list_for_each_entry(vha, &ha->vp_list, vp_list) {
88                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
89                         return vha;
90         }
91         return NULL;
92 }
93
94 /*
95  * qla2x00_mark_vp_devices_dead
96  *      Updates fcport state when device goes offline.
97  *
98  * Input:
99  *      ha = adapter block pointer.
100  *      fcport = port structure pointer.
101  *
102  * Return:
103  *      None.
104  *
105  * Context:
106  */
107 void
108 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
109 {
110         fc_port_t *fcport;
111         scsi_qla_host_t *pha = to_qla_parent(vha);
112
113         list_for_each_entry(fcport, &pha->fcports, list) {
114                 if (fcport->vp_idx != vha->vp_idx)
115                         continue;
116
117                 DEBUG15(printk("scsi(%ld): Marking port dead, "
118                     "loop_id=0x%04x :%x\n",
119                     vha->host_no, fcport->loop_id, fcport->vp_idx));
120
121                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
122                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
123         }
124 }
125
126 int
127 qla24xx_disable_vp(scsi_qla_host_t *vha)
128 {
129         int ret;
130
131         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
132         atomic_set(&vha->loop_state, LOOP_DOWN);
133         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
134
135         /* Delete all vp's fcports from parent's list */
136         qla2x00_mark_vp_devices_dead(vha);
137         atomic_set(&vha->vp_state, VP_FAILED);
138         vha->flags.management_server_logged_in = 0;
139         if (ret == QLA_SUCCESS) {
140                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
141         } else {
142                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
143                 return -1;
144         }
145         return 0;
146 }
147
148 int
149 qla24xx_enable_vp(scsi_qla_host_t *vha)
150 {
151         int ret;
152         scsi_qla_host_t *ha = vha->parent;
153
154         /* Check if physical ha port is Up */
155         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
156                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
157                 vha->vp_err_state =  VP_ERR_PORTDWN;
158                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
159                 goto enable_failed;
160         }
161
162         /* Initialize the new vport unless it is a persistent port */
163         down(&ha->vport_sem);
164         ret = qla24xx_modify_vp_config(vha);
165         up(&ha->vport_sem);
166
167         if (ret != QLA_SUCCESS) {
168                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
169                 goto enable_failed;
170         }
171
172         DEBUG15(qla_printk(KERN_INFO, ha,
173             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
174         return 0;
175
176 enable_failed:
177         DEBUG15(qla_printk(KERN_INFO, ha,
178             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
179         return 1;
180 }
181
182 /**
183  * qla24xx_modify_vport() -  Modifies the virtual fabric port's configuration
184  * @ha: HA context
185  * @vp: pointer to buffer of virtual port parameters.
186  * @ret_code: return error code:
187  *
188  * Returns the virtual port id, or MAX_VSAN_ID, if couldn't create.
189  */
190 uint32_t
191 qla24xx_modify_vhba(scsi_qla_host_t *ha, vport_params_t *vp, uint32_t *vp_id)
192 {
193         scsi_qla_host_t *vha;
194
195         vha = qla24xx_find_vhost_by_name(ha, vp->port_name);
196         if (!vha) {
197                 *vp_id = MAX_NUM_VPORT_LOOP;
198                 return VP_RET_CODE_WWPN;
199         }
200
201         if (qla24xx_enable_vp(vha)) {
202                 scsi_host_put(vha->host);
203                 qla2x00_mem_free(vha);
204                 *vp_id = MAX_NUM_VPORT_LOOP;
205                 return VP_RET_CODE_RESOURCES;
206         }
207
208         *vp_id = vha->vp_idx;
209         return VP_RET_CODE_OK;
210 }
211
212 void
213 qla24xx_configure_vp(scsi_qla_host_t *vha)
214 {
215         struct fc_vport *fc_vport;
216         int ret;
217
218         fc_vport = vha->fc_vport;
219
220         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
221             vha->host_no, __func__));
222         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
223         if (ret != QLA_SUCCESS) {
224                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
225                     " of RSCN requests: 0x%x\n", ret));
226                 return;
227         } else {
228                 /* Corresponds to SCR enabled */
229                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
230         }
231
232         vha->flags.online = 1;
233         if (qla24xx_configure_vhba(vha))
234                 return;
235
236         atomic_set(&vha->vp_state, VP_ACTIVE);
237         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
238 }
239
240 void
241 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
242 {
243         int i, vp_idx_matched;
244         scsi_qla_host_t *vha;
245
246         if (ha->parent)
247                 return;
248
249         i = find_next_bit((unsigned long *)ha->vp_idx_map,
250             MAX_MULTI_ID_FABRIC + 1, 1);
251         for (;i <= MAX_MULTI_ID_FABRIC;
252             i = find_next_bit((unsigned long *)ha->vp_idx_map,
253             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
254                 vp_idx_matched = 0;
255
256                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
257                         if (i == vha->vp_idx) {
258                                 vp_idx_matched = 1;
259                                 break;
260                         }
261                 }
262
263                 if (vp_idx_matched) {
264                         switch (mb[0]) {
265                         case MBA_LIP_OCCURRED:
266                         case MBA_LOOP_UP:
267                         case MBA_LOOP_DOWN:
268                         case MBA_LIP_RESET:
269                         case MBA_POINT_TO_POINT:
270                         case MBA_CHG_IN_CONNECTION:
271                         case MBA_PORT_UPDATE:
272                         case MBA_RSCN_UPDATE:
273                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
274                                     " VP[%d], mb = 0x%x, vha=%p\n",
275                                     vha->host_no, __func__,i, *mb, vha));
276                                 qla2x00_async_event(vha, mb);
277                                 break;
278                         }
279                 }
280         }
281 }
282
283 void
284 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
285 {
286         /*
287          * Physical port will do most of the abort and recovery work. We can
288          * just treat it as a loop down
289          */
290         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
291                 atomic_set(&vha->loop_state, LOOP_DOWN);
292                 qla2x00_mark_all_devices_lost(vha, 0);
293         } else {
294                 if (!atomic_read(&vha->loop_down_timer))
295                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
296         }
297
298         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
299             vha->host_no, vha->vp_idx));
300         qla24xx_enable_vp(vha);
301 }
302
303 int
304 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
305 {
306         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
307                 /* VP acquired. complete port configuration */
308                 qla24xx_configure_vp(vha);
309                 return 0;
310         }
311
312         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
313                 qla2x00_vp_abort_isp(vha);
314
315         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
316             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
317                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
318         }
319
320         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
321                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
322                         qla2x00_loop_resync(vha);
323                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
324                 }
325         }
326
327         return 0;
328 }
329
330 void
331 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
332 {
333         int ret;
334         int i, vp_idx_matched;
335         scsi_qla_host_t *vha;
336
337         if (ha->parent)
338                 return;
339         if (list_empty(&ha->vp_list))
340                 return;
341
342         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
343
344         i = find_next_bit((unsigned long *)ha->vp_idx_map,
345             MAX_MULTI_ID_FABRIC + 1, 1);
346         for (;i <= MAX_MULTI_ID_FABRIC;
347             i = find_next_bit((unsigned long *)ha->vp_idx_map,
348             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
349                 vp_idx_matched = 0;
350
351                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
352                         if (i == vha->vp_idx) {
353                                 vp_idx_matched = 1;
354                                 break;
355                         }
356                 }
357
358                 if (vp_idx_matched)
359                         ret = qla2x00_do_dpc_vp(vha);
360         }
361 }
362
363 int
364 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
365 {
366         scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
367         scsi_qla_host_t *vha;
368         uint8_t port_name[WWN_SIZE];
369
370         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
371                 return VPCERR_UNSUPPORTED;
372
373         /* Check up the F/W and H/W support NPIV */
374         if (!ha->flags.npiv_supported)
375                 return VPCERR_UNSUPPORTED;
376
377         /* Check up whether npiv supported switch presented */
378         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
379                 return VPCERR_NO_FABRIC_SUPP;
380
381         /* Check up unique WWPN */
382         u64_to_wwn(fc_vport->port_name, port_name);
383         vha = qla24xx_find_vhost_by_name(ha, port_name);
384         if (vha)
385                 return VPCERR_BAD_WWN;
386
387         /* Check up max-npiv-supports */
388         if (ha->num_vhosts > ha->max_npiv_vports) {
389                 DEBUG15(printk("scsi(%ld): num_vhosts %d is bigger than "
390                     "max_npv_vports %d.\n", ha->host_no,
391                     (uint16_t) ha->num_vhosts, (int) ha->max_npiv_vports));
392                 return VPCERR_UNSUPPORTED;
393         }
394         return 0;
395 }
396
397 scsi_qla_host_t *
398 qla24xx_create_vhost(struct fc_vport *fc_vport)
399 {
400         scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
401         scsi_qla_host_t *vha;
402         struct Scsi_Host *host;
403
404         host = scsi_host_alloc(&qla24xx_driver_template,
405             sizeof(scsi_qla_host_t));
406         if (!host) {
407                 printk(KERN_WARNING
408                     "qla2xxx: scsi_host_alloc() failed for vport\n");
409                 return(NULL);
410         }
411
412         vha = (scsi_qla_host_t *)host->hostdata;
413
414         /* clone the parent hba */
415         memcpy(vha, ha, sizeof (scsi_qla_host_t));
416
417         fc_vport->dd_data = vha;
418
419         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
420         if (!vha->node_name)
421                 goto create_vhost_failed_1;
422
423         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
424         if (!vha->port_name)
425                 goto create_vhost_failed_2;
426
427         /* New host info */
428         u64_to_wwn(fc_vport->node_name, vha->node_name);
429         u64_to_wwn(fc_vport->port_name, vha->port_name);
430
431         vha->host = host;
432         vha->host_no = host->host_no;
433         vha->parent = ha;
434         vha->fc_vport = fc_vport;
435         vha->device_flags = 0;
436         vha->instance = num_hosts;
437         vha->vp_idx = qla24xx_allocate_vp_id(vha);
438         if (vha->vp_idx > ha->max_npiv_vports) {
439                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
440                         vha->host_no));
441                 goto create_vhost_failed_3;
442         }
443         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
444
445         init_MUTEX(&vha->mbx_cmd_sem);
446         init_MUTEX_LOCKED(&vha->mbx_intr_sem);
447
448         INIT_LIST_HEAD(&vha->list);
449         INIT_LIST_HEAD(&vha->fcports);
450         INIT_LIST_HEAD(&vha->vp_fcports);
451
452         vha->dpc_flags = 0L;
453         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
454         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
455
456         /*
457          * To fix the issue of processing a parent's RSCN for the vport before
458          * its SCR is complete.
459          */
460         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
461         atomic_set(&vha->loop_state, LOOP_DOWN);
462         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
463
464         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
465
466         host->can_queue = vha->request_q_length + 128;
467         host->this_id = 255;
468         host->cmd_per_lun = 3;
469         host->max_cmd_len = MAX_CMDSZ;
470         host->max_channel = MAX_BUSES - 1;
471         host->max_lun = MAX_LUNS;
472         host->unique_id = vha->instance;
473         host->max_id = MAX_TARGETS_2200;
474         host->transportt = qla2xxx_transport_vport_template;
475
476         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
477             vha->host_no, vha));
478
479         vha->flags.init_done = 1;
480         num_hosts++;
481
482         down(&ha->vport_sem);
483         set_bit(vha->vp_idx, (unsigned long *)ha->vp_idx_map);
484         ha->cur_vport_count++;
485         up(&ha->vport_sem);
486
487         return vha;
488
489 create_vhost_failed_3:
490         kfree(vha->port_name);
491
492 create_vhost_failed_2:
493         kfree(vha->node_name);
494
495 create_vhost_failed_1:
496         return NULL;
497 }