Update to initiator driver from 2.6.27
[mirror/scst/.git] / qla2x00t / 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/moduleparam.h>
10 #include <linux/vmalloc.h>
11 #include <linux/smp_lock.h>
12 #include <linux/list.h>
13
14 #include <scsi/scsi_tcq.h>
15 #include <scsi/scsicam.h>
16 #include <linux/delay.h>
17
18 void
19 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
20 {
21         if (vha->parent && vha->timer_active) {
22                 del_timer_sync(&vha->timer);
23                 vha->timer_active = 0;
24         }
25 }
26
27 static uint32_t
28 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
29 {
30         uint32_t vp_id;
31         scsi_qla_host_t *ha = vha->parent;
32
33         /* Find an empty slot and assign an vp_id */
34         mutex_lock(&ha->vport_lock);
35         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
36         if (vp_id > ha->max_npiv_vports) {
37                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
38                     vp_id, ha->max_npiv_vports));
39                 mutex_unlock(&ha->vport_lock);
40                 return vp_id;
41         }
42
43         set_bit(vp_id, ha->vp_idx_map);
44         ha->num_vhosts++;
45         ha->cur_vport_count++;
46         vha->vp_idx = vp_id;
47         list_add_tail(&vha->vp_list, &ha->vp_list);
48         mutex_unlock(&ha->vport_lock);
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         mutex_lock(&ha->vport_lock);
59         vp_id = vha->vp_idx;
60         ha->num_vhosts--;
61         ha->cur_vport_count--;
62         clear_bit(vp_id, ha->vp_idx_map);
63         list_del(&vha->vp_list);
64         mutex_unlock(&ha->vport_lock);
65 }
66
67 static scsi_qla_host_t *
68 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
69 {
70         scsi_qla_host_t *vha;
71
72         /* Locate matching device in database. */
73         list_for_each_entry(vha, &ha->vp_list, vp_list) {
74                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
75                         return vha;
76         }
77         return NULL;
78 }
79
80 /*
81  * qla2x00_mark_vp_devices_dead
82  *      Updates fcport state when device goes offline.
83  *
84  * Input:
85  *      ha = adapter block pointer.
86  *      fcport = port structure pointer.
87  *
88  * Return:
89  *      None.
90  *
91  * Context:
92  */
93 static void
94 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
95 {
96         fc_port_t *fcport;
97         scsi_qla_host_t *pha = to_qla_parent(vha);
98
99         list_for_each_entry_rcu(fcport, &pha->fcports, list) {
100                 if (fcport->vp_idx != vha->vp_idx)
101                         continue;
102
103                 DEBUG15(printk("scsi(%ld): Marking port dead, "
104                     "loop_id=0x%04x :%x\n",
105                     vha->host_no, fcport->loop_id, fcport->vp_idx));
106
107                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
108                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
109         }
110 }
111
112 int
113 qla24xx_disable_vp(scsi_qla_host_t *vha)
114 {
115         int ret;
116
117         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
118         atomic_set(&vha->loop_state, LOOP_DOWN);
119         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
120
121         /* Delete all vp's fcports from parent's list */
122         qla2x00_mark_vp_devices_dead(vha);
123         atomic_set(&vha->vp_state, VP_FAILED);
124         vha->flags.management_server_logged_in = 0;
125         if (ret == QLA_SUCCESS) {
126                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
127         } else {
128                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
129                 return -1;
130         }
131         return 0;
132 }
133
134 int
135 qla24xx_enable_vp(scsi_qla_host_t *vha)
136 {
137         int ret;
138         scsi_qla_host_t *ha = vha->parent;
139
140         /* Check if physical ha port is Up */
141         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
142                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
143                 vha->vp_err_state =  VP_ERR_PORTDWN;
144                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
145                 goto enable_failed;
146         }
147
148         /* Initialize the new vport unless it is a persistent port */
149         mutex_lock(&ha->vport_lock);
150         ret = qla24xx_modify_vp_config(vha);
151         mutex_unlock(&ha->vport_lock);
152
153         if (ret != QLA_SUCCESS) {
154                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
155                 goto enable_failed;
156         }
157
158         DEBUG15(qla_printk(KERN_INFO, ha,
159             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
160         return 0;
161
162 enable_failed:
163         DEBUG15(qla_printk(KERN_INFO, ha,
164             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
165         return 1;
166 }
167
168 static void
169 qla24xx_configure_vp(scsi_qla_host_t *vha)
170 {
171         struct fc_vport *fc_vport;
172         int ret;
173
174         fc_vport = vha->fc_vport;
175
176         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
177             vha->host_no, __func__));
178         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
179         if (ret != QLA_SUCCESS) {
180                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
181                     " of RSCN requests: 0x%x\n", ret));
182                 return;
183         } else {
184                 /* Corresponds to SCR enabled */
185                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
186         }
187
188         vha->flags.online = 1;
189         if (qla24xx_configure_vhba(vha))
190                 return;
191
192         atomic_set(&vha->vp_state, VP_ACTIVE);
193         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
194 }
195
196 void
197 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
198 {
199         int i, vp_idx_matched;
200         scsi_qla_host_t *vha;
201
202         if (ha->parent)
203                 return;
204
205         for_each_mapped_vp_idx(ha, i) {
206                 vp_idx_matched = 0;
207
208                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
209                         if (i == vha->vp_idx) {
210                                 vp_idx_matched = 1;
211                                 break;
212                         }
213                 }
214
215                 if (vp_idx_matched) {
216                         switch (mb[0]) {
217                         case MBA_LIP_OCCURRED:
218                         case MBA_LOOP_UP:
219                         case MBA_LOOP_DOWN:
220                         case MBA_LIP_RESET:
221                         case MBA_POINT_TO_POINT:
222                         case MBA_CHG_IN_CONNECTION:
223                         case MBA_PORT_UPDATE:
224                         case MBA_RSCN_UPDATE:
225                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
226                                     " VP[%d], mb = 0x%x, vha=%p\n",
227                                     vha->host_no, __func__,i, *mb, vha));
228                                 qla2x00_async_event(vha, mb);
229                                 break;
230                         }
231                 }
232         }
233 }
234
235 void
236 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
237 {
238         /*
239          * Physical port will do most of the abort and recovery work. We can
240          * just treat it as a loop down
241          */
242         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
243                 atomic_set(&vha->loop_state, LOOP_DOWN);
244                 qla2x00_mark_all_devices_lost(vha, 0);
245         } else {
246                 if (!atomic_read(&vha->loop_down_timer))
247                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
248         }
249
250         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
251             vha->host_no, vha->vp_idx));
252         qla24xx_enable_vp(vha);
253 }
254
255 static int
256 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
257 {
258         scsi_qla_host_t *ha = vha->parent;
259
260         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
261                 /* VP acquired. complete port configuration */
262                 if (atomic_read(&ha->loop_state) == LOOP_READY) {
263                         qla24xx_configure_vp(vha);
264                 } else {
265                         set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
266                         set_bit(VP_DPC_NEEDED, &ha->dpc_flags);
267                 }
268
269                 return 0;
270         }
271
272         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
273                 qla2x00_vp_abort_isp(vha);
274
275         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
276             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
277                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
278         }
279
280         if (atomic_read(&vha->vp_state) == VP_ACTIVE &&
281             test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
282                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
283                         qla2x00_loop_resync(vha);
284                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
285                 }
286         }
287
288         return 0;
289 }
290
291 void
292 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
293 {
294         int ret;
295         int i, vp_idx_matched;
296         scsi_qla_host_t *vha;
297
298         if (ha->parent)
299                 return;
300         if (list_empty(&ha->vp_list))
301                 return;
302
303         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
304
305         for_each_mapped_vp_idx(ha, i) {
306                 vp_idx_matched = 0;
307
308                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
309                         if (i == vha->vp_idx) {
310                                 vp_idx_matched = 1;
311                                 break;
312                         }
313                 }
314
315                 if (vp_idx_matched)
316                         ret = qla2x00_do_dpc_vp(vha);
317         }
318 }
319
320 int
321 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
322 {
323         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
324         scsi_qla_host_t *vha;
325         uint8_t port_name[WWN_SIZE];
326
327         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
328                 return VPCERR_UNSUPPORTED;
329
330         /* Check up the F/W and H/W support NPIV */
331         if (!ha->flags.npiv_supported)
332                 return VPCERR_UNSUPPORTED;
333
334         /* Check up whether npiv supported switch presented */
335         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
336                 return VPCERR_NO_FABRIC_SUPP;
337
338         /* Check up unique WWPN */
339         u64_to_wwn(fc_vport->port_name, port_name);
340         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
341                 return VPCERR_BAD_WWN;
342         vha = qla24xx_find_vhost_by_name(ha, port_name);
343         if (vha)
344                 return VPCERR_BAD_WWN;
345
346         /* Check up max-npiv-supports */
347         if (ha->num_vhosts > ha->max_npiv_vports) {
348                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
349                     "max_npv_vports %ud.\n", ha->host_no,
350                     ha->num_vhosts, ha->max_npiv_vports));
351                 return VPCERR_UNSUPPORTED;
352         }
353         return 0;
354 }
355
356 scsi_qla_host_t *
357 qla24xx_create_vhost(struct fc_vport *fc_vport)
358 {
359         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
360         scsi_qla_host_t *vha;
361         struct Scsi_Host *host;
362
363         host = scsi_host_alloc(&qla24xx_driver_template,
364             sizeof(scsi_qla_host_t));
365         if (!host) {
366                 printk(KERN_WARNING
367                     "qla2xxx: scsi_host_alloc() failed for vport\n");
368                 return(NULL);
369         }
370
371         vha = shost_priv(host);
372
373         /* clone the parent hba */
374         memcpy(vha, ha, sizeof (scsi_qla_host_t));
375
376         fc_vport->dd_data = vha;
377
378         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
379         if (!vha->node_name)
380                 goto create_vhost_failed_1;
381
382         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
383         if (!vha->port_name)
384                 goto create_vhost_failed_2;
385
386         /* New host info */
387         u64_to_wwn(fc_vport->node_name, vha->node_name);
388         u64_to_wwn(fc_vport->port_name, vha->port_name);
389
390         vha->host = host;
391         vha->host_no = host->host_no;
392         vha->parent = ha;
393         vha->fc_vport = fc_vport;
394         vha->device_flags = 0;
395         vha->vp_idx = qla24xx_allocate_vp_id(vha);
396         if (vha->vp_idx > ha->max_npiv_vports) {
397                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
398                         vha->host_no));
399                 goto create_vhost_failed_3;
400         }
401         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
402
403         init_completion(&vha->mbx_cmd_comp);
404         complete(&vha->mbx_cmd_comp);
405         init_completion(&vha->mbx_intr_comp);
406
407         INIT_LIST_HEAD(&vha->list);
408         INIT_LIST_HEAD(&vha->fcports);
409         INIT_LIST_HEAD(&vha->vp_fcports);
410         INIT_LIST_HEAD(&vha->work_list);
411
412         vha->dpc_flags = 0L;
413         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
414         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
415
416         /*
417          * To fix the issue of processing a parent's RSCN for the vport before
418          * its SCR is complete.
419          */
420         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
421         atomic_set(&vha->loop_state, LOOP_DOWN);
422         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
423
424         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
425
426         host->can_queue = vha->request_q_length + 128;
427         host->this_id = 255;
428         host->cmd_per_lun = 3;
429         host->max_cmd_len = MAX_CMDSZ;
430         host->max_channel = MAX_BUSES - 1;
431         host->max_lun = MAX_LUNS;
432         host->unique_id = host->host_no;
433         host->max_id = MAX_TARGETS_2200;
434         host->transportt = qla2xxx_transport_vport_template;
435
436         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
437             vha->host_no, vha));
438
439         vha->flags.init_done = 1;
440
441         return vha;
442
443 create_vhost_failed_3:
444         kfree(vha->port_name);
445
446 create_vhost_failed_2:
447         kfree(vha->node_name);
448
449 create_vhost_failed_1:
450         return NULL;
451 }