1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic Fibre Channel HBA Driver
4 * Copyright (c) 2003-2014 QLogic Corporation
5 */
6 #include "qla_def.h"
7
8 #include <linux/debugfs.h>
9 #include <linux/seq_file.h>
10
11 static struct dentry *qla2x00_dfs_root;
12 static atomic_t qla2x00_dfs_root_count;
13
14 #define QLA_DFS_RPORT_DEVLOSS_TMO 1
15
16 static int
qla_dfs_rport_get(struct fc_port * fp,int attr_id,u64 * val)17 qla_dfs_rport_get(struct fc_port *fp, int attr_id, u64 *val)
18 {
19 switch (attr_id) {
20 case QLA_DFS_RPORT_DEVLOSS_TMO:
21 /* Only supported for FC-NVMe devices that are registered. */
22 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
23 return -EIO;
24 *val = fp->nvme_remote_port->dev_loss_tmo;
25 break;
26 default:
27 return -EINVAL;
28 }
29 return 0;
30 }
31
32 static int
qla_dfs_rport_set(struct fc_port * fp,int attr_id,u64 val)33 qla_dfs_rport_set(struct fc_port *fp, int attr_id, u64 val)
34 {
35 switch (attr_id) {
36 case QLA_DFS_RPORT_DEVLOSS_TMO:
37 /* Only supported for FC-NVMe devices that are registered. */
38 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
39 return -EIO;
40 #if (IS_ENABLED(CONFIG_NVME_FC))
41 return nvme_fc_set_remoteport_devloss(fp->nvme_remote_port,
42 val);
43 #else /* CONFIG_NVME_FC */
44 return -EINVAL;
45 #endif /* CONFIG_NVME_FC */
46 default:
47 return -EINVAL;
48 }
49 return 0;
50 }
51
52 #define DEFINE_QLA_DFS_RPORT_RW_ATTR(_attr_id, _attr) \
53 static int qla_dfs_rport_##_attr##_get(void *data, u64 *val) \
54 { \
55 struct fc_port *fp = data; \
56 return qla_dfs_rport_get(fp, _attr_id, val); \
57 } \
58 static int qla_dfs_rport_##_attr##_set(void *data, u64 val) \
59 { \
60 struct fc_port *fp = data; \
61 return qla_dfs_rport_set(fp, _attr_id, val); \
62 } \
63 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_##_attr##_fops, \
64 qla_dfs_rport_##_attr##_get, \
65 qla_dfs_rport_##_attr##_set, "%llu\n")
66
67 /*
68 * Wrapper for getting fc_port fields.
69 *
70 * _attr : Attribute name.
71 * _get_val : Accessor macro to retrieve the value.
72 */
73 #define DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val) \
74 static int qla_dfs_rport_field_##_attr##_get(void *data, u64 *val) \
75 { \
76 struct fc_port *fp = data; \
77 *val = _get_val; \
78 return 0; \
79 } \
80 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_field_##_attr##_fops, \
81 qla_dfs_rport_field_##_attr##_get, \
82 NULL, "%llu\n")
83
84 #define DEFINE_QLA_DFS_RPORT_ACCESS(_attr, _get_val) \
85 DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)
86
87 #define DEFINE_QLA_DFS_RPORT_FIELD(_attr) \
88 DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, fp->_attr)
89
90 DEFINE_QLA_DFS_RPORT_RW_ATTR(QLA_DFS_RPORT_DEVLOSS_TMO, dev_loss_tmo);
91
92 DEFINE_QLA_DFS_RPORT_FIELD(disc_state);
93 DEFINE_QLA_DFS_RPORT_FIELD(scan_state);
94 DEFINE_QLA_DFS_RPORT_FIELD(fw_login_state);
95 DEFINE_QLA_DFS_RPORT_FIELD(login_pause);
96 DEFINE_QLA_DFS_RPORT_FIELD(flags);
97 DEFINE_QLA_DFS_RPORT_FIELD(nvme_flag);
98 DEFINE_QLA_DFS_RPORT_FIELD(last_rscn_gen);
99 DEFINE_QLA_DFS_RPORT_FIELD(rscn_gen);
100 DEFINE_QLA_DFS_RPORT_FIELD(login_gen);
101 DEFINE_QLA_DFS_RPORT_FIELD(loop_id);
102 DEFINE_QLA_DFS_RPORT_FIELD_GET(port_id, fp->d_id.b24);
103 DEFINE_QLA_DFS_RPORT_FIELD_GET(sess_kref, kref_read(&fp->sess_kref));
104
105 void
qla2x00_dfs_create_rport(scsi_qla_host_t * vha,struct fc_port * fp)106 qla2x00_dfs_create_rport(scsi_qla_host_t *vha, struct fc_port *fp)
107 {
108 char wwn[32];
109
110 #define QLA_CREATE_RPORT_FIELD_ATTR(_attr) \
111 debugfs_create_file(#_attr, 0400, fp->dfs_rport_dir, \
112 fp, &qla_dfs_rport_field_##_attr##_fops)
113
114 if (!vha->dfs_rport_root || fp->dfs_rport_dir)
115 return;
116
117 sprintf(wwn, "pn-%016llx", wwn_to_u64(fp->port_name));
118 fp->dfs_rport_dir = debugfs_create_dir(wwn, vha->dfs_rport_root);
119 if (IS_ERR(fp->dfs_rport_dir))
120 return;
121 if (NVME_TARGET(vha->hw, fp))
122 debugfs_create_file("dev_loss_tmo", 0600, fp->dfs_rport_dir,
123 fp, &qla_dfs_rport_dev_loss_tmo_fops);
124
125 QLA_CREATE_RPORT_FIELD_ATTR(disc_state);
126 QLA_CREATE_RPORT_FIELD_ATTR(scan_state);
127 QLA_CREATE_RPORT_FIELD_ATTR(fw_login_state);
128 QLA_CREATE_RPORT_FIELD_ATTR(login_pause);
129 QLA_CREATE_RPORT_FIELD_ATTR(flags);
130 QLA_CREATE_RPORT_FIELD_ATTR(nvme_flag);
131 QLA_CREATE_RPORT_FIELD_ATTR(last_rscn_gen);
132 QLA_CREATE_RPORT_FIELD_ATTR(rscn_gen);
133 QLA_CREATE_RPORT_FIELD_ATTR(login_gen);
134 QLA_CREATE_RPORT_FIELD_ATTR(loop_id);
135 QLA_CREATE_RPORT_FIELD_ATTR(port_id);
136 QLA_CREATE_RPORT_FIELD_ATTR(sess_kref);
137 }
138
139 void
qla2x00_dfs_remove_rport(scsi_qla_host_t * vha,struct fc_port * fp)140 qla2x00_dfs_remove_rport(scsi_qla_host_t *vha, struct fc_port *fp)
141 {
142 if (!vha->dfs_rport_root || !fp->dfs_rport_dir)
143 return;
144 debugfs_remove_recursive(fp->dfs_rport_dir);
145 fp->dfs_rport_dir = NULL;
146 }
147
148 static int
qla2x00_dfs_tgt_sess_show(struct seq_file * s,void * unused)149 qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
150 {
151 scsi_qla_host_t *vha = s->private;
152 struct qla_hw_data *ha = vha->hw;
153 unsigned long flags;
154 struct fc_port *sess = NULL;
155 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
156
157 seq_printf(s, "%s\n", vha->host_str);
158 if (tgt) {
159 seq_puts(s, "Port ID Port Name Handle\n");
160
161 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
162 list_for_each_entry(sess, &vha->vp_fcports, list)
163 seq_printf(s, "%02x:%02x:%02x %8phC %d\n",
164 sess->d_id.b.domain, sess->d_id.b.area,
165 sess->d_id.b.al_pa, sess->port_name,
166 sess->loop_id);
167 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
168 }
169
170 return 0;
171 }
172
173 DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_sess);
174
175 static int
qla2x00_dfs_tgt_port_database_show(struct seq_file * s,void * unused)176 qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
177 {
178 scsi_qla_host_t *vha = s->private;
179 struct qla_hw_data *ha = vha->hw;
180 struct gid_list_info *gid_list;
181 dma_addr_t gid_list_dma;
182 fc_port_t fc_port;
183 char *id_iter;
184 int rc, i;
185 uint16_t entries, loop_id;
186
187 seq_printf(s, "%s\n", vha->host_str);
188 gid_list = dma_alloc_coherent(&ha->pdev->dev,
189 qla2x00_gid_list_size(ha),
190 &gid_list_dma, GFP_KERNEL);
191 if (!gid_list) {
192 ql_dbg(ql_dbg_user, vha, 0x7018,
193 "DMA allocation failed for %u\n",
194 qla2x00_gid_list_size(ha));
195 return 0;
196 }
197
198 rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma,
199 &entries);
200 if (rc != QLA_SUCCESS)
201 goto out_free_id_list;
202
203 id_iter = (char *)gid_list;
204
205 seq_puts(s, "Port Name Port ID Loop ID\n");
206
207 for (i = 0; i < entries; i++) {
208 struct gid_list_info *gid =
209 (struct gid_list_info *)id_iter;
210 loop_id = le16_to_cpu(gid->loop_id);
211 memset(&fc_port, 0, sizeof(fc_port_t));
212
213 fc_port.loop_id = loop_id;
214
215 rc = qla24xx_gpdb_wait(vha, &fc_port, 0);
216 seq_printf(s, "%8phC %02x%02x%02x %d\n",
217 fc_port.port_name, fc_port.d_id.b.domain,
218 fc_port.d_id.b.area, fc_port.d_id.b.al_pa,
219 fc_port.loop_id);
220 id_iter += ha->gid_list_info_size;
221 }
222 out_free_id_list:
223 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
224 gid_list, gid_list_dma);
225
226 return 0;
227 }
228
229 DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_port_database);
230
231 static int
qla_dfs_fw_resource_cnt_show(struct seq_file * s,void * unused)232 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
233 {
234 struct scsi_qla_host *vha = s->private;
235 uint16_t mb[MAX_IOCB_MB_REG];
236 int rc;
237 struct qla_hw_data *ha = vha->hw;
238 u16 iocbs_used, i, exch_used;
239
240 rc = qla24xx_res_count_wait(vha, mb, SIZEOF_IOCB_MB_REG);
241 if (rc != QLA_SUCCESS) {
242 seq_printf(s, "Mailbox Command failed %d, mb %#x", rc, mb[0]);
243 } else {
244 seq_puts(s, "FW Resource count\n\n");
245 seq_printf(s, "Original TGT exchg count[%d]\n", mb[1]);
246 seq_printf(s, "Current TGT exchg count[%d]\n", mb[2]);
247 seq_printf(s, "Current Initiator Exchange count[%d]\n", mb[3]);
248 seq_printf(s, "Original Initiator Exchange count[%d]\n", mb[6]);
249 seq_printf(s, "Current IOCB count[%d]\n", mb[7]);
250 seq_printf(s, "Original IOCB count[%d]\n", mb[10]);
251 seq_printf(s, "MAX VP count[%d]\n", mb[11]);
252 seq_printf(s, "MAX FCF count[%d]\n", mb[12]);
253 seq_printf(s, "Current free pageable XCB buffer cnt[%d]\n",
254 mb[20]);
255 seq_printf(s, "Original Initiator fast XCB buffer cnt[%d]\n",
256 mb[21]);
257 seq_printf(s, "Current free Initiator fast XCB buffer cnt[%d]\n",
258 mb[22]);
259 seq_printf(s, "Original Target fast XCB buffer cnt[%d]\n",
260 mb[23]);
261 }
262
263 if (ql2xenforce_iocb_limit) {
264 /* lock is not require. It's an estimate. */
265 iocbs_used = ha->base_qpair->fwres.iocbs_used;
266 exch_used = ha->base_qpair->fwres.exch_used;
267 for (i = 0; i < ha->max_qpairs; i++) {
268 if (ha->queue_pair_map[i]) {
269 iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
270 exch_used += ha->queue_pair_map[i]->fwres.exch_used;
271 }
272 }
273
274 seq_printf(s, "Driver: estimate iocb used [%d] high water limit [%d]\n",
275 iocbs_used, ha->base_qpair->fwres.iocbs_limit);
276
277 seq_printf(s, "estimate exchange used[%d] high water limit [%d]\n",
278 exch_used, ha->base_qpair->fwres.exch_limit);
279
280 if (ql2xenforce_iocb_limit == 2) {
281 iocbs_used = atomic_read(&ha->fwres.iocb_used);
282 exch_used = atomic_read(&ha->fwres.exch_used);
283 seq_printf(s, " estimate iocb2 used [%d] high water limit [%d]\n",
284 iocbs_used, ha->fwres.iocb_limit);
285
286 seq_printf(s, " estimate exchange2 used[%d] high water limit [%d] \n",
287 exch_used, ha->fwres.exch_limit);
288 }
289 }
290
291 return 0;
292 }
293
294 DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
295
296 static int
qla_dfs_tgt_counters_show(struct seq_file * s,void * unused)297 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
298 {
299 struct scsi_qla_host *vha = s->private;
300 struct qla_qpair *qpair = vha->hw->base_qpair;
301 uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
302 core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
303 num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
304 u16 i;
305 fc_port_t *fcport = NULL;
306
307 if (qla2x00_chip_is_down(vha))
308 return 0;
309
310 qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
311 core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
312 qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
313 core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
314 qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
315 core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
316 num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
317 num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
318 num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
319
320 for (i = 0; i < vha->hw->max_qpairs; i++) {
321 qpair = vha->hw->queue_pair_map[i];
322 if (!qpair)
323 continue;
324 qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
325 core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
326 qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
327 core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
328 qla_core_ret_sta_ctio +=
329 qpair->tgt_counters.qla_core_ret_sta_ctio;
330 core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
331 num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
332 num_alloc_iocb_failed +=
333 qpair->tgt_counters.num_alloc_iocb_failed;
334 num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
335 }
336
337 seq_puts(s, "Target Counters\n");
338 seq_printf(s, "qla_core_sbt_cmd = %lld\n",
339 qla_core_sbt_cmd);
340 seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
341 qla_core_ret_sta_ctio);
342 seq_printf(s, "qla_core_ret_ctio = %lld\n",
343 qla_core_ret_ctio);
344 seq_printf(s, "core_qla_que_buf = %lld\n",
345 core_qla_que_buf);
346 seq_printf(s, "core_qla_snd_status = %lld\n",
347 core_qla_snd_status);
348 seq_printf(s, "core_qla_free_cmd = %lld\n",
349 core_qla_free_cmd);
350 seq_printf(s, "num alloc iocb failed = %lld\n",
351 num_alloc_iocb_failed);
352 seq_printf(s, "num term exchange sent = %lld\n",
353 num_term_xchg_sent);
354 seq_printf(s, "num Q full sent = %lld\n",
355 num_q_full_sent);
356
357 /* DIF stats */
358 seq_printf(s, "DIF Inp Bytes = %lld\n",
359 vha->qla_stats.qla_dif_stats.dif_input_bytes);
360 seq_printf(s, "DIF Outp Bytes = %lld\n",
361 vha->qla_stats.qla_dif_stats.dif_output_bytes);
362 seq_printf(s, "DIF Inp Req = %lld\n",
363 vha->qla_stats.qla_dif_stats.dif_input_requests);
364 seq_printf(s, "DIF Outp Req = %lld\n",
365 vha->qla_stats.qla_dif_stats.dif_output_requests);
366 seq_printf(s, "DIF Guard err = %d\n",
367 vha->qla_stats.qla_dif_stats.dif_guard_err);
368 seq_printf(s, "DIF Ref tag err = %d\n",
369 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
370 seq_printf(s, "DIF App tag err = %d\n",
371 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
372
373 seq_puts(s, "\n");
374 seq_puts(s, "Initiator Error Counters\n");
375 seq_printf(s, "HW Error Count = %14lld\n",
376 vha->hw_err_cnt);
377 seq_printf(s, "Link Down Count = %14lld\n",
378 vha->short_link_down_cnt);
379 seq_printf(s, "Interface Err Count = %14lld\n",
380 vha->interface_err_cnt);
381 seq_printf(s, "Cmd Timeout Count = %14lld\n",
382 vha->cmd_timeout_cnt);
383 seq_printf(s, "Reset Count = %14lld\n",
384 vha->reset_cmd_err_cnt);
385 seq_puts(s, "\n");
386
387 list_for_each_entry(fcport, &vha->vp_fcports, list) {
388 if (!fcport->rport)
389 continue;
390
391 seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
392 fcport->rport->number, fcport->tgt_short_link_down_cnt);
393 }
394 seq_puts(s, "\n");
395
396 return 0;
397 }
398
399 DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
400
401 static int
qla2x00_dfs_fce_show(struct seq_file * s,void * unused)402 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
403 {
404 scsi_qla_host_t *vha = s->private;
405 uint32_t cnt;
406 uint32_t *fce;
407 uint64_t fce_start;
408 struct qla_hw_data *ha = vha->hw;
409
410 mutex_lock(&ha->fce_mutex);
411
412 seq_puts(s, "FCE Trace Buffer\n");
413 seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
414 seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
415 seq_puts(s, "FCE Enable Registers\n");
416 seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
417 ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
418 ha->fce_mb[5], ha->fce_mb[6]);
419
420 fce = (uint32_t *) ha->fce;
421 fce_start = (unsigned long long) ha->fce_dma;
422 for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
423 if (cnt % 8 == 0)
424 seq_printf(s, "\n%llx: ",
425 (unsigned long long)((cnt * 4) + fce_start));
426 else
427 seq_putc(s, ' ');
428 seq_printf(s, "%08x", *fce++);
429 }
430
431 seq_puts(s, "\nEnd\n");
432
433 mutex_unlock(&ha->fce_mutex);
434
435 return 0;
436 }
437
438 static int
qla2x00_dfs_fce_open(struct inode * inode,struct file * file)439 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
440 {
441 scsi_qla_host_t *vha = inode->i_private;
442 struct qla_hw_data *ha = vha->hw;
443 int rval;
444
445 if (!ha->flags.fce_enabled)
446 goto out;
447
448 mutex_lock(&ha->fce_mutex);
449
450 /* Pause tracing to flush FCE buffers. */
451 rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
452 if (rval)
453 ql_dbg(ql_dbg_user, vha, 0x705c,
454 "DebugFS: Unable to disable FCE (%d).\n", rval);
455
456 ha->flags.fce_enabled = 0;
457
458 mutex_unlock(&ha->fce_mutex);
459 out:
460 return single_open(file, qla2x00_dfs_fce_show, vha);
461 }
462
463 static int
qla2x00_dfs_fce_release(struct inode * inode,struct file * file)464 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
465 {
466 scsi_qla_host_t *vha = inode->i_private;
467 struct qla_hw_data *ha = vha->hw;
468 int rval;
469
470 if (ha->flags.fce_enabled)
471 goto out;
472
473 mutex_lock(&ha->fce_mutex);
474
475 /* Re-enable FCE tracing. */
476 ha->flags.fce_enabled = 1;
477 memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
478 rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
479 ha->fce_mb, &ha->fce_bufs);
480 if (rval) {
481 ql_dbg(ql_dbg_user, vha, 0x700d,
482 "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
483 ha->flags.fce_enabled = 0;
484 }
485
486 mutex_unlock(&ha->fce_mutex);
487 out:
488 return single_release(inode, file);
489 }
490
491 static const struct file_operations dfs_fce_ops = {
492 .open = qla2x00_dfs_fce_open,
493 .read = seq_read,
494 .llseek = seq_lseek,
495 .release = qla2x00_dfs_fce_release,
496 };
497
498 static int
qla_dfs_naqp_show(struct seq_file * s,void * unused)499 qla_dfs_naqp_show(struct seq_file *s, void *unused)
500 {
501 struct scsi_qla_host *vha = s->private;
502 struct qla_hw_data *ha = vha->hw;
503
504 seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
505 return 0;
506 }
507
508 /*
509 * Helper macros for setting up debugfs entries.
510 * _name: The name of the debugfs entry
511 * _ctx_struct: The context that was passed when creating the debugfs file
512 *
513 * QLA_DFS_SETUP_RD could be used when there is only a show function.
514 * - show function take the name qla_dfs_<sysfs-name>_show
515 *
516 * QLA_DFS_SETUP_RW could be used when there are both show and write functions.
517 * - show function take the name qla_dfs_<sysfs-name>_show
518 * - write function take the name qla_dfs_<sysfs-name>_write
519 *
520 * To have a new debugfs entry, do:
521 * 1. Create a "struct dentry *" in the appropriate structure in the format
522 * dfs_<sysfs-name>
523 * 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW
524 * 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE
525 * or QLA_DFS_ROOT_CREATE_FILE
526 * 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE
527 * or QLA_DFS_ROOT_REMOVE_FILE
528 *
529 * Example for creating "TEST" sysfs file:
530 * 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
531 * 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t);
532 * 3. In qla2x00_dfs_setup():
533 * QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
534 * 4. In qla2x00_dfs_remove():
535 * QLA_DFS_REMOVE_FILE(ha, TEST);
536 */
537 #define QLA_DFS_SETUP_RD(_name, _ctx_struct) \
538 static int \
539 qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
540 { \
541 _ctx_struct *__ctx = inode->i_private; \
542 \
543 return single_open(file, qla_dfs_##_name##_show, __ctx); \
544 } \
545 \
546 static const struct file_operations qla_dfs_##_name##_ops = { \
547 .open = qla_dfs_##_name##_open, \
548 .read = seq_read, \
549 .llseek = seq_lseek, \
550 .release = single_release, \
551 };
552
553 #define QLA_DFS_SETUP_RW(_name, _ctx_struct) \
554 static int \
555 qla_dfs_##_name##_open(struct inode *inode, struct file *file) \
556 { \
557 _ctx_struct *__ctx = inode->i_private; \
558 \
559 return single_open(file, qla_dfs_##_name##_show, __ctx); \
560 } \
561 \
562 static const struct file_operations qla_dfs_##_name##_ops = { \
563 .open = qla_dfs_##_name##_open, \
564 .read = seq_read, \
565 .llseek = seq_lseek, \
566 .release = single_release, \
567 .write = qla_dfs_##_name##_write, \
568 };
569
570 #define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx) \
571 do { \
572 if (!qla_dfs_##_name) \
573 qla_dfs_##_name = debugfs_create_file(#_name, \
574 _perm, qla2x00_dfs_root, _ctx, \
575 &qla_dfs_##_name##_ops); \
576 } while (0)
577
578 #define QLA_DFS_ROOT_REMOVE_FILE(_name) \
579 do { \
580 if (qla_dfs_##_name) { \
581 debugfs_remove(qla_dfs_##_name); \
582 qla_dfs_##_name = NULL; \
583 } \
584 } while (0)
585
586 #define QLA_DFS_CREATE_FILE(_struct, _name, _perm, _parent, _ctx) \
587 do { \
588 (_struct)->dfs_##_name = debugfs_create_file(#_name, \
589 _perm, _parent, _ctx, \
590 &qla_dfs_##_name##_ops) \
591 } while (0)
592
593 #define QLA_DFS_REMOVE_FILE(_struct, _name) \
594 do { \
595 if ((_struct)->dfs_##_name) { \
596 debugfs_remove((_struct)->dfs_##_name); \
597 (_struct)->dfs_##_name = NULL; \
598 } \
599 } while (0)
600
601 static int
qla_dfs_naqp_open(struct inode * inode,struct file * file)602 qla_dfs_naqp_open(struct inode *inode, struct file *file)
603 {
604 struct scsi_qla_host *vha = inode->i_private;
605
606 return single_open(file, qla_dfs_naqp_show, vha);
607 }
608
609 static ssize_t
qla_dfs_naqp_write(struct file * file,const char __user * buffer,size_t count,loff_t * pos)610 qla_dfs_naqp_write(struct file *file, const char __user *buffer,
611 size_t count, loff_t *pos)
612 {
613 struct seq_file *s = file->private_data;
614 struct scsi_qla_host *vha = s->private;
615 struct qla_hw_data *ha = vha->hw;
616 char *buf;
617 int rc = 0;
618 unsigned long num_act_qp;
619
620 if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
621 pr_err("host%ld: this adapter does not support Multi Q.",
622 vha->host_no);
623 return -EINVAL;
624 }
625
626 if (!vha->flags.qpairs_available) {
627 pr_err("host%ld: Driver is not setup with Multi Q.",
628 vha->host_no);
629 return -EINVAL;
630 }
631 buf = memdup_user_nul(buffer, count);
632 if (IS_ERR(buf)) {
633 pr_err("host%ld: fail to copy user buffer.",
634 vha->host_no);
635 return PTR_ERR(buf);
636 }
637
638 num_act_qp = simple_strtoul(buf, NULL, 0);
639
640 if (num_act_qp >= vha->hw->max_qpairs) {
641 pr_err("User set invalid number of qpairs %lu. Max = %d",
642 num_act_qp, vha->hw->max_qpairs);
643 rc = -EINVAL;
644 goto out_free;
645 }
646
647 if (num_act_qp != ha->tgt.num_act_qpairs) {
648 ha->tgt.num_act_qpairs = num_act_qp;
649 qlt_clr_qp_table(vha);
650 }
651 rc = count;
652 out_free:
653 kfree(buf);
654 return rc;
655 }
656
657 static const struct file_operations dfs_naqp_ops = {
658 .open = qla_dfs_naqp_open,
659 .read = seq_read,
660 .llseek = seq_lseek,
661 .release = single_release,
662 .write = qla_dfs_naqp_write,
663 };
664
665
666 int
qla2x00_dfs_setup(scsi_qla_host_t * vha)667 qla2x00_dfs_setup(scsi_qla_host_t *vha)
668 {
669 struct qla_hw_data *ha = vha->hw;
670
671 if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
672 !IS_QLA27XX(ha) && !IS_QLA28XX(ha))
673 goto out;
674 if (!ha->fce)
675 goto out;
676
677 if (qla2x00_dfs_root)
678 goto create_dir;
679
680 atomic_set(&qla2x00_dfs_root_count, 0);
681 qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
682
683 create_dir:
684 if (ha->dfs_dir)
685 goto create_nodes;
686
687 mutex_init(&ha->fce_mutex);
688 ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
689
690 atomic_inc(&qla2x00_dfs_root_count);
691
692 create_nodes:
693 ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
694 S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
695
696 ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
697 ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
698
699 ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
700 S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
701
702 ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
703 &dfs_fce_ops);
704
705 ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
706 S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
707
708 if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
709 ha->tgt.dfs_naqp = debugfs_create_file("naqp",
710 0400, ha->dfs_dir, vha, &dfs_naqp_ops);
711 if (IS_ERR(ha->tgt.dfs_naqp)) {
712 ql_log(ql_log_warn, vha, 0xd011,
713 "Unable to create debugFS naqp node.\n");
714 goto out;
715 }
716 }
717 vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
718 if (IS_ERR(vha->dfs_rport_root)) {
719 ql_log(ql_log_warn, vha, 0xd012,
720 "Unable to create debugFS rports node.\n");
721 goto out;
722 }
723 out:
724 return 0;
725 }
726
727 int
qla2x00_dfs_remove(scsi_qla_host_t * vha)728 qla2x00_dfs_remove(scsi_qla_host_t *vha)
729 {
730 struct qla_hw_data *ha = vha->hw;
731
732 if (ha->tgt.dfs_naqp) {
733 debugfs_remove(ha->tgt.dfs_naqp);
734 ha->tgt.dfs_naqp = NULL;
735 }
736
737 if (ha->tgt.dfs_tgt_sess) {
738 debugfs_remove(ha->tgt.dfs_tgt_sess);
739 ha->tgt.dfs_tgt_sess = NULL;
740 }
741
742 if (ha->tgt.dfs_tgt_port_database) {
743 debugfs_remove(ha->tgt.dfs_tgt_port_database);
744 ha->tgt.dfs_tgt_port_database = NULL;
745 }
746
747 if (ha->dfs_fw_resource_cnt) {
748 debugfs_remove(ha->dfs_fw_resource_cnt);
749 ha->dfs_fw_resource_cnt = NULL;
750 }
751
752 if (ha->dfs_tgt_counters) {
753 debugfs_remove(ha->dfs_tgt_counters);
754 ha->dfs_tgt_counters = NULL;
755 }
756
757 if (ha->dfs_fce) {
758 debugfs_remove(ha->dfs_fce);
759 ha->dfs_fce = NULL;
760 }
761
762 if (vha->dfs_rport_root) {
763 debugfs_remove_recursive(vha->dfs_rport_root);
764 vha->dfs_rport_root = NULL;
765 }
766
767 if (ha->dfs_dir) {
768 debugfs_remove(ha->dfs_dir);
769 ha->dfs_dir = NULL;
770 atomic_dec(&qla2x00_dfs_root_count);
771 }
772
773 if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
774 qla2x00_dfs_root) {
775 debugfs_remove(qla2x00_dfs_root);
776 qla2x00_dfs_root = NULL;
777 }
778
779 return 0;
780 }
781