Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
[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 static 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(ha->vp_idx_map, ha->max_npiv_vports + 1);
51         if (vp_id > ha->max_npiv_vports) {
52                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
53                     vp_id, ha->max_npiv_vports));
54                 up(&ha->vport_sem);
55                 return vp_id;
56         }
57
58         set_bit(vp_id, ha->vp_idx_map);
59         ha->num_vhosts++;
60         vha->vp_idx = vp_id;
61         list_add_tail(&vha->vp_list, &ha->vp_list);
62         up(&ha->vport_sem);
63         return vp_id;
64 }
65
66 void
67 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
68 {
69         uint16_t vp_id;
70         scsi_qla_host_t *ha = vha->parent;
71
72         down(&ha->vport_sem);
73         vp_id = vha->vp_idx;
74         ha->num_vhosts--;
75         clear_bit(vp_id, ha->vp_idx_map);
76         list_del(&vha->vp_list);
77         up(&ha->vport_sem);
78 }
79
80 static scsi_qla_host_t *
81 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
82 {
83         scsi_qla_host_t *vha;
84
85         /* Locate matching device in database. */
86         list_for_each_entry(vha, &ha->vp_list, vp_list) {
87                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
88                         return vha;
89         }
90         return NULL;
91 }
92
93 /*
94  * qla2x00_mark_vp_devices_dead
95  *      Updates fcport state when device goes offline.
96  *
97  * Input:
98  *      ha = adapter block pointer.
99  *      fcport = port structure pointer.
100  *
101  * Return:
102  *      None.
103  *
104  * Context:
105  */
106 static void
107 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
108 {
109         fc_port_t *fcport;
110         scsi_qla_host_t *pha = to_qla_parent(vha);
111
112         list_for_each_entry(fcport, &pha->fcports, list) {
113                 if (fcport->vp_idx != vha->vp_idx)
114                         continue;
115
116                 DEBUG15(printk("scsi(%ld): Marking port dead, "
117                     "loop_id=0x%04x :%x\n",
118                     vha->host_no, fcport->loop_id, fcport->vp_idx));
119
120                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
121                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
122         }
123 }
124
125 int
126 qla24xx_disable_vp(scsi_qla_host_t *vha)
127 {
128         int ret;
129
130         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
131         atomic_set(&vha->loop_state, LOOP_DOWN);
132         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
133
134         /* Delete all vp's fcports from parent's list */
135         qla2x00_mark_vp_devices_dead(vha);
136         atomic_set(&vha->vp_state, VP_FAILED);
137         vha->flags.management_server_logged_in = 0;
138         if (ret == QLA_SUCCESS) {
139                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
140         } else {
141                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
142                 return -1;
143         }
144         return 0;
145 }
146
147 int
148 qla24xx_enable_vp(scsi_qla_host_t *vha)
149 {
150         int ret;
151         scsi_qla_host_t *ha = vha->parent;
152
153         /* Check if physical ha port is Up */
154         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
155                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
156                 vha->vp_err_state =  VP_ERR_PORTDWN;
157                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
158                 goto enable_failed;
159         }
160
161         /* Initialize the new vport unless it is a persistent port */
162         down(&ha->vport_sem);
163         ret = qla24xx_modify_vp_config(vha);
164         up(&ha->vport_sem);
165
166         if (ret != QLA_SUCCESS) {
167                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
168                 goto enable_failed;
169         }
170
171         DEBUG15(qla_printk(KERN_INFO, ha,
172             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
173         return 0;
174
175 enable_failed:
176         DEBUG15(qla_printk(KERN_INFO, ha,
177             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
178         return 1;
179 }
180
181 static void
182 qla24xx_configure_vp(scsi_qla_host_t *vha)
183 {
184         struct fc_vport *fc_vport;
185         int ret;
186
187         fc_vport = vha->fc_vport;
188
189         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
190             vha->host_no, __func__));
191         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
192         if (ret != QLA_SUCCESS) {
193                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
194                     " of RSCN requests: 0x%x\n", ret));
195                 return;
196         } else {
197                 /* Corresponds to SCR enabled */
198                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
199         }
200
201         vha->flags.online = 1;
202         if (qla24xx_configure_vhba(vha))
203                 return;
204
205         atomic_set(&vha->vp_state, VP_ACTIVE);
206         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
207 }
208
209 void
210 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
211 {
212         int i, vp_idx_matched;
213         scsi_qla_host_t *vha;
214
215         if (ha->parent)
216                 return;
217
218         for_each_mapped_vp_idx(ha, i) {
219                 vp_idx_matched = 0;
220
221                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
222                         if (i == vha->vp_idx) {
223                                 vp_idx_matched = 1;
224                                 break;
225                         }
226                 }
227
228                 if (vp_idx_matched) {
229                         switch (mb[0]) {
230                         case MBA_LIP_OCCURRED:
231                         case MBA_LOOP_UP:
232                         case MBA_LOOP_DOWN:
233                         case MBA_LIP_RESET:
234                         case MBA_POINT_TO_POINT:
235                         case MBA_CHG_IN_CONNECTION:
236                         case MBA_PORT_UPDATE:
237                         case MBA_RSCN_UPDATE:
238                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
239                                     " VP[%d], mb = 0x%x, vha=%p\n",
240                                     vha->host_no, __func__,i, *mb, vha));
241                                 qla2x00_async_event(vha, mb);
242                                 break;
243                         }
244                 }
245         }
246 }
247
248 void
249 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
250 {
251         /*
252          * Physical port will do most of the abort and recovery work. We can
253          * just treat it as a loop down
254          */
255         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
256                 atomic_set(&vha->loop_state, LOOP_DOWN);
257                 qla2x00_mark_all_devices_lost(vha, 0);
258         } else {
259                 if (!atomic_read(&vha->loop_down_timer))
260                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
261         }
262
263         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
264             vha->host_no, vha->vp_idx));
265         qla24xx_enable_vp(vha);
266 }
267
268 static int
269 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
270 {
271         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
272                 /* VP acquired. complete port configuration */
273                 qla24xx_configure_vp(vha);
274                 return 0;
275         }
276
277         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
278                 qla2x00_vp_abort_isp(vha);
279
280         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
281             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
282                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
283         }
284
285         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
286                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
287                         qla2x00_loop_resync(vha);
288                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
289                 }
290         }
291
292         return 0;
293 }
294
295 void
296 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
297 {
298         int ret;
299         int i, vp_idx_matched;
300         scsi_qla_host_t *vha;
301
302         if (ha->parent)
303                 return;
304         if (list_empty(&ha->vp_list))
305                 return;
306
307         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
308
309         for_each_mapped_vp_idx(ha, i) {
310                 vp_idx_matched = 0;
311
312                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
313                         if (i == vha->vp_idx) {
314                                 vp_idx_matched = 1;
315                                 break;
316                         }
317                 }
318
319                 if (vp_idx_matched)
320                         ret = qla2x00_do_dpc_vp(vha);
321         }
322 }
323
324 int
325 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
326 {
327         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
328         scsi_qla_host_t *vha;
329         uint8_t port_name[WWN_SIZE];
330
331         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
332                 return VPCERR_UNSUPPORTED;
333
334         /* Check up the F/W and H/W support NPIV */
335         if (!ha->flags.npiv_supported)
336                 return VPCERR_UNSUPPORTED;
337
338         /* Check up whether npiv supported switch presented */
339         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
340                 return VPCERR_NO_FABRIC_SUPP;
341
342         /* Check up unique WWPN */
343         u64_to_wwn(fc_vport->port_name, port_name);
344         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
345                 return VPCERR_BAD_WWN;
346         vha = qla24xx_find_vhost_by_name(ha, port_name);
347         if (vha)
348                 return VPCERR_BAD_WWN;
349
350         /* Check up max-npiv-supports */
351         if (ha->num_vhosts > ha->max_npiv_vports) {
352                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
353                     "max_npv_vports %ud.\n", ha->host_no,
354                     ha->num_vhosts, ha->max_npiv_vports));
355                 return VPCERR_UNSUPPORTED;
356         }
357         return 0;
358 }
359
360 scsi_qla_host_t *
361 qla24xx_create_vhost(struct fc_vport *fc_vport)
362 {
363         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
364         scsi_qla_host_t *vha;
365         struct Scsi_Host *host;
366
367         host = scsi_host_alloc(&qla24xx_driver_template,
368             sizeof(scsi_qla_host_t));
369         if (!host) {
370                 printk(KERN_WARNING
371                     "qla2xxx: scsi_host_alloc() failed for vport\n");
372                 return(NULL);
373         }
374
375         vha = shost_priv(host);
376
377         /* clone the parent hba */
378         memcpy(vha, ha, sizeof (scsi_qla_host_t));
379
380         fc_vport->dd_data = vha;
381
382         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
383         if (!vha->node_name)
384                 goto create_vhost_failed_1;
385
386         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
387         if (!vha->port_name)
388                 goto create_vhost_failed_2;
389
390         /* New host info */
391         u64_to_wwn(fc_vport->node_name, vha->node_name);
392         u64_to_wwn(fc_vport->port_name, vha->port_name);
393
394         vha->host = host;
395         vha->host_no = host->host_no;
396         vha->parent = ha;
397         vha->fc_vport = fc_vport;
398         vha->device_flags = 0;
399         vha->instance = num_hosts;
400         vha->vp_idx = qla24xx_allocate_vp_id(vha);
401         if (vha->vp_idx > ha->max_npiv_vports) {
402                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
403                         vha->host_no));
404                 goto create_vhost_failed_3;
405         }
406         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
407
408         init_completion(&vha->mbx_cmd_comp);
409         complete(&vha->mbx_cmd_comp);
410         init_completion(&vha->mbx_intr_comp);
411
412         INIT_LIST_HEAD(&vha->list);
413         INIT_LIST_HEAD(&vha->fcports);
414         INIT_LIST_HEAD(&vha->vp_fcports);
415
416         vha->dpc_flags = 0L;
417         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
418         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
419
420         /*
421          * To fix the issue of processing a parent's RSCN for the vport before
422          * its SCR is complete.
423          */
424         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
425         atomic_set(&vha->loop_state, LOOP_DOWN);
426         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
427
428         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
429
430         host->can_queue = vha->request_q_length + 128;
431         host->this_id = 255;
432         host->cmd_per_lun = 3;
433         host->max_cmd_len = MAX_CMDSZ;
434         host->max_channel = MAX_BUSES - 1;
435         host->max_lun = MAX_LUNS;
436         host->unique_id = vha->instance;
437         host->max_id = MAX_TARGETS_2200;
438         host->transportt = qla2xxx_transport_vport_template;
439
440         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
441             vha->host_no, vha));
442
443         vha->flags.init_done = 1;
444         num_hosts++;
445
446         down(&ha->vport_sem);
447         set_bit(vha->vp_idx, ha->vp_idx_map);
448         ha->cur_vport_count++;
449         up(&ha->vport_sem);
450
451         return vha;
452
453 create_vhost_failed_3:
454         kfree(vha->port_name);
455
456 create_vhost_failed_2:
457         kfree(vha->node_name);
458
459 create_vhost_failed_1:
460         return NULL;
461 }