Merge branch 'irq-fix' of git://www.modarm9.com/gitsrc/pub/people/ukleinek/linux...
[linux-2.6] / drivers / scsi / qla2xxx / qla_mid.c
1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2008 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 #include "qla_def.h"
8
9 #include <linux/version.h>
10 #include <linux/moduleparam.h>
11 #include <linux/vmalloc.h>
12 #include <linux/smp_lock.h>
13 #include <linux/list.h>
14
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/scsicam.h>
17 #include <linux/delay.h>
18
19 void
20 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
21 {
22         if (vha->parent && vha->timer_active) {
23                 del_timer_sync(&vha->timer);
24                 vha->timer_active = 0;
25         }
26 }
27
28 static uint32_t
29 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
30 {
31         uint32_t vp_id;
32         scsi_qla_host_t *ha = vha->parent;
33
34         /* Find an empty slot and assign an vp_id */
35         down(&ha->vport_sem);
36         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
37         if (vp_id > ha->max_npiv_vports) {
38                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
39                     vp_id, ha->max_npiv_vports));
40                 up(&ha->vport_sem);
41                 return vp_id;
42         }
43
44         set_bit(vp_id, ha->vp_idx_map);
45         ha->num_vhosts++;
46         vha->vp_idx = vp_id;
47         list_add_tail(&vha->vp_list, &ha->vp_list);
48         up(&ha->vport_sem);
49         return vp_id;
50 }
51
52 void
53 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
54 {
55         uint16_t vp_id;
56         scsi_qla_host_t *ha = vha->parent;
57
58         down(&ha->vport_sem);
59         vp_id = vha->vp_idx;
60         ha->num_vhosts--;
61         clear_bit(vp_id, ha->vp_idx_map);
62         list_del(&vha->vp_list);
63         up(&ha->vport_sem);
64 }
65
66 static scsi_qla_host_t *
67 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
68 {
69         scsi_qla_host_t *vha;
70
71         /* Locate matching device in database. */
72         list_for_each_entry(vha, &ha->vp_list, vp_list) {
73                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
74                         return vha;
75         }
76         return NULL;
77 }
78
79 /*
80  * qla2x00_mark_vp_devices_dead
81  *      Updates fcport state when device goes offline.
82  *
83  * Input:
84  *      ha = adapter block pointer.
85  *      fcport = port structure pointer.
86  *
87  * Return:
88  *      None.
89  *
90  * Context:
91  */
92 static void
93 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
94 {
95         fc_port_t *fcport;
96         scsi_qla_host_t *pha = to_qla_parent(vha);
97
98         list_for_each_entry(fcport, &pha->fcports, list) {
99                 if (fcport->vp_idx != vha->vp_idx)
100                         continue;
101
102                 DEBUG15(printk("scsi(%ld): Marking port dead, "
103                     "loop_id=0x%04x :%x\n",
104                     vha->host_no, fcport->loop_id, fcport->vp_idx));
105
106                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
107                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
108         }
109 }
110
111 int
112 qla24xx_disable_vp(scsi_qla_host_t *vha)
113 {
114         int ret;
115
116         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
117         atomic_set(&vha->loop_state, LOOP_DOWN);
118         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
119
120         /* Delete all vp's fcports from parent's list */
121         qla2x00_mark_vp_devices_dead(vha);
122         atomic_set(&vha->vp_state, VP_FAILED);
123         vha->flags.management_server_logged_in = 0;
124         if (ret == QLA_SUCCESS) {
125                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
126         } else {
127                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
128                 return -1;
129         }
130         return 0;
131 }
132
133 int
134 qla24xx_enable_vp(scsi_qla_host_t *vha)
135 {
136         int ret;
137         scsi_qla_host_t *ha = vha->parent;
138
139         /* Check if physical ha port is Up */
140         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
141                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
142                 vha->vp_err_state =  VP_ERR_PORTDWN;
143                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
144                 goto enable_failed;
145         }
146
147         /* Initialize the new vport unless it is a persistent port */
148         down(&ha->vport_sem);
149         ret = qla24xx_modify_vp_config(vha);
150         up(&ha->vport_sem);
151
152         if (ret != QLA_SUCCESS) {
153                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
154                 goto enable_failed;
155         }
156
157         DEBUG15(qla_printk(KERN_INFO, ha,
158             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
159         return 0;
160
161 enable_failed:
162         DEBUG15(qla_printk(KERN_INFO, ha,
163             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
164         return 1;
165 }
166
167 static void
168 qla24xx_configure_vp(scsi_qla_host_t *vha)
169 {
170         struct fc_vport *fc_vport;
171         int ret;
172
173         fc_vport = vha->fc_vport;
174
175         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
176             vha->host_no, __func__));
177         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
178         if (ret != QLA_SUCCESS) {
179                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
180                     " of RSCN requests: 0x%x\n", ret));
181                 return;
182         } else {
183                 /* Corresponds to SCR enabled */
184                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
185         }
186
187         vha->flags.online = 1;
188         if (qla24xx_configure_vhba(vha))
189                 return;
190
191         atomic_set(&vha->vp_state, VP_ACTIVE);
192         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
193 }
194
195 void
196 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
197 {
198         int i, vp_idx_matched;
199         scsi_qla_host_t *vha;
200
201         if (ha->parent)
202                 return;
203
204         for_each_mapped_vp_idx(ha, i) {
205                 vp_idx_matched = 0;
206
207                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
208                         if (i == vha->vp_idx) {
209                                 vp_idx_matched = 1;
210                                 break;
211                         }
212                 }
213
214                 if (vp_idx_matched) {
215                         switch (mb[0]) {
216                         case MBA_LIP_OCCURRED:
217                         case MBA_LOOP_UP:
218                         case MBA_LOOP_DOWN:
219                         case MBA_LIP_RESET:
220                         case MBA_POINT_TO_POINT:
221                         case MBA_CHG_IN_CONNECTION:
222                         case MBA_PORT_UPDATE:
223                         case MBA_RSCN_UPDATE:
224                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
225                                     " VP[%d], mb = 0x%x, vha=%p\n",
226                                     vha->host_no, __func__,i, *mb, vha));
227                                 qla2x00_async_event(vha, mb);
228                                 break;
229                         }
230                 }
231         }
232 }
233
234 void
235 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
236 {
237         /*
238          * Physical port will do most of the abort and recovery work. We can
239          * just treat it as a loop down
240          */
241         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
242                 atomic_set(&vha->loop_state, LOOP_DOWN);
243                 qla2x00_mark_all_devices_lost(vha, 0);
244         } else {
245                 if (!atomic_read(&vha->loop_down_timer))
246                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
247         }
248
249         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
250             vha->host_no, vha->vp_idx));
251         qla24xx_enable_vp(vha);
252 }
253
254 static int
255 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
256 {
257         scsi_qla_host_t *ha = vha->parent;
258
259         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
260                 /* VP acquired. complete port configuration */
261                 if (atomic_read(&ha->loop_state) == LOOP_READY) {
262                         qla24xx_configure_vp(vha);
263                 } else {
264                         set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
265                         set_bit(VP_DPC_NEEDED, &ha->dpc_flags);
266                 }
267
268                 return 0;
269         }
270
271         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
272                 qla2x00_vp_abort_isp(vha);
273
274         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
275             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
276                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
277         }
278
279         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
280                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
281                         qla2x00_loop_resync(vha);
282                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
283                 }
284         }
285
286         return 0;
287 }
288
289 void
290 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
291 {
292         int ret;
293         int i, vp_idx_matched;
294         scsi_qla_host_t *vha;
295
296         if (ha->parent)
297                 return;
298         if (list_empty(&ha->vp_list))
299                 return;
300
301         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
302
303         for_each_mapped_vp_idx(ha, i) {
304                 vp_idx_matched = 0;
305
306                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
307                         if (i == vha->vp_idx) {
308                                 vp_idx_matched = 1;
309                                 break;
310                         }
311                 }
312
313                 if (vp_idx_matched)
314                         ret = qla2x00_do_dpc_vp(vha);
315         }
316 }
317
318 int
319 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
320 {
321         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
322         scsi_qla_host_t *vha;
323         uint8_t port_name[WWN_SIZE];
324
325         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
326                 return VPCERR_UNSUPPORTED;
327
328         /* Check up the F/W and H/W support NPIV */
329         if (!ha->flags.npiv_supported)
330                 return VPCERR_UNSUPPORTED;
331
332         /* Check up whether npiv supported switch presented */
333         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
334                 return VPCERR_NO_FABRIC_SUPP;
335
336         /* Check up unique WWPN */
337         u64_to_wwn(fc_vport->port_name, port_name);
338         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
339                 return VPCERR_BAD_WWN;
340         vha = qla24xx_find_vhost_by_name(ha, port_name);
341         if (vha)
342                 return VPCERR_BAD_WWN;
343
344         /* Check up max-npiv-supports */
345         if (ha->num_vhosts > ha->max_npiv_vports) {
346                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
347                     "max_npv_vports %ud.\n", ha->host_no,
348                     ha->num_vhosts, ha->max_npiv_vports));
349                 return VPCERR_UNSUPPORTED;
350         }
351         return 0;
352 }
353
354 scsi_qla_host_t *
355 qla24xx_create_vhost(struct fc_vport *fc_vport)
356 {
357         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
358         scsi_qla_host_t *vha;
359         struct Scsi_Host *host;
360
361         host = scsi_host_alloc(&qla24xx_driver_template,
362             sizeof(scsi_qla_host_t));
363         if (!host) {
364                 printk(KERN_WARNING
365                     "qla2xxx: scsi_host_alloc() failed for vport\n");
366                 return(NULL);
367         }
368
369         vha = shost_priv(host);
370
371         /* clone the parent hba */
372         memcpy(vha, ha, sizeof (scsi_qla_host_t));
373
374         fc_vport->dd_data = vha;
375
376         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
377         if (!vha->node_name)
378                 goto create_vhost_failed_1;
379
380         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
381         if (!vha->port_name)
382                 goto create_vhost_failed_2;
383
384         /* New host info */
385         u64_to_wwn(fc_vport->node_name, vha->node_name);
386         u64_to_wwn(fc_vport->port_name, vha->port_name);
387
388         vha->host = host;
389         vha->host_no = host->host_no;
390         vha->parent = ha;
391         vha->fc_vport = fc_vport;
392         vha->device_flags = 0;
393         vha->instance = num_hosts;
394         vha->vp_idx = qla24xx_allocate_vp_id(vha);
395         if (vha->vp_idx > ha->max_npiv_vports) {
396                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
397                         vha->host_no));
398                 goto create_vhost_failed_3;
399         }
400         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
401
402         init_completion(&vha->mbx_cmd_comp);
403         complete(&vha->mbx_cmd_comp);
404         init_completion(&vha->mbx_intr_comp);
405
406         INIT_LIST_HEAD(&vha->list);
407         INIT_LIST_HEAD(&vha->fcports);
408         INIT_LIST_HEAD(&vha->vp_fcports);
409
410         vha->dpc_flags = 0L;
411         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
412         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
413
414         /*
415          * To fix the issue of processing a parent's RSCN for the vport before
416          * its SCR is complete.
417          */
418         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
419         atomic_set(&vha->loop_state, LOOP_DOWN);
420         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
421
422         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
423
424         host->can_queue = vha->request_q_length + 128;
425         host->this_id = 255;
426         host->cmd_per_lun = 3;
427         host->max_cmd_len = MAX_CMDSZ;
428         host->max_channel = MAX_BUSES - 1;
429         host->max_lun = MAX_LUNS;
430         host->unique_id = vha->instance;
431         host->max_id = MAX_TARGETS_2200;
432         host->transportt = qla2xxx_transport_vport_template;
433
434         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
435             vha->host_no, vha));
436
437         vha->flags.init_done = 1;
438         num_hosts++;
439
440         down(&ha->vport_sem);
441         set_bit(vha->vp_idx, ha->vp_idx_map);
442         ha->cur_vport_count++;
443         up(&ha->vport_sem);
444
445         return vha;
446
447 create_vhost_failed_3:
448         kfree(vha->port_name);
449
450 create_vhost_failed_2:
451         kfree(vha->node_name);
452
453 create_vhost_failed_1:
454         return NULL;
455 }