659a5d63467dc335a570f62e20f4d874bbbabe23
[linux-2.6.git] / drivers / scsi / qla2xxx / qla_attr.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/vmalloc.h>
22 #include <scsi/scsi_transport_fc.h>
23
24 /* SYSFS attributes --------------------------------------------------------- */
25
26 static ssize_t
27 qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf, loff_t off,
28     size_t count)
29 {
30         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
31             struct device, kobj)));
32
33         if (ha->fw_dump_reading == 0)
34                 return 0;
35         if (off > ha->fw_dump_buffer_len)
36                 return 0;
37         if (off + count > ha->fw_dump_buffer_len)
38                 count = ha->fw_dump_buffer_len - off;
39
40         memcpy(buf, &ha->fw_dump_buffer[off], count);
41
42         return (count);
43 }
44
45 static ssize_t
46 qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf, loff_t off,
47     size_t count)
48 {
49         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
50             struct device, kobj)));
51         int reading;
52         uint32_t dump_size;
53
54         if (off != 0)
55                 return (0);
56
57         reading = simple_strtol(buf, NULL, 10);
58         switch (reading) {
59         case 0:
60                 if (ha->fw_dump_reading == 1) {
61                         qla_printk(KERN_INFO, ha,
62                             "Firmware dump cleared on (%ld).\n",
63                             ha->host_no);
64
65                         vfree(ha->fw_dump_buffer);
66                         if (!IS_QLA24XX(ha) && !IS_QLA25XX(ha))
67                                 free_pages((unsigned long)ha->fw_dump,
68                                     ha->fw_dump_order);
69
70                         ha->fw_dump_reading = 0;
71                         ha->fw_dump_buffer = NULL;
72                         ha->fw_dump = NULL;
73                         ha->fw_dumped = 0;
74                 }
75                 break;
76         case 1:
77                 if ((ha->fw_dump || ha->fw_dumped) && !ha->fw_dump_reading) {
78                         ha->fw_dump_reading = 1;
79
80                         if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
81                                 dump_size = FW_DUMP_SIZE_24XX;
82                         else {
83                                 dump_size = FW_DUMP_SIZE_1M;
84                                 if (ha->fw_memory_size < 0x20000)
85                                         dump_size = FW_DUMP_SIZE_128K;
86                                 else if (ha->fw_memory_size < 0x80000)
87                                         dump_size = FW_DUMP_SIZE_512K;
88                         }
89                         ha->fw_dump_buffer = (char *)vmalloc(dump_size);
90                         if (ha->fw_dump_buffer == NULL) {
91                                 qla_printk(KERN_WARNING, ha,
92                                     "Unable to allocate memory for firmware "
93                                     "dump buffer (%d).\n", dump_size);
94
95                                 ha->fw_dump_reading = 0;
96                                 return (count);
97                         }
98                         qla_printk(KERN_INFO, ha,
99                             "Firmware dump ready for read on (%ld).\n",
100                             ha->host_no);
101                         memset(ha->fw_dump_buffer, 0, dump_size);
102                         ha->isp_ops.ascii_fw_dump(ha);
103                         ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
104                 }
105                 break;
106         }
107         return (count);
108 }
109
110 static struct bin_attribute sysfs_fw_dump_attr = {
111         .attr = {
112                 .name = "fw_dump",
113                 .mode = S_IRUSR | S_IWUSR,
114                 .owner = THIS_MODULE,
115         },
116         .size = 0,
117         .read = qla2x00_sysfs_read_fw_dump,
118         .write = qla2x00_sysfs_write_fw_dump,
119 };
120
121 static ssize_t
122 qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf, loff_t off,
123     size_t count)
124 {
125         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
126             struct device, kobj)));
127         unsigned long   flags;
128
129         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
130                 return 0;
131
132         /* Read NVRAM. */
133         spin_lock_irqsave(&ha->hardware_lock, flags);
134         ha->isp_ops.read_nvram(ha, (uint8_t *)buf, ha->nvram_base,
135             ha->nvram_size);
136         spin_unlock_irqrestore(&ha->hardware_lock, flags);
137
138         return (count);
139 }
140
141 static ssize_t
142 qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf, loff_t off,
143     size_t count)
144 {
145         struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
146             struct device, kobj)));
147         unsigned long   flags;
148         uint16_t        cnt;
149
150         if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
151                 return 0;
152
153         /* Checksum NVRAM. */
154         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
155                 uint32_t *iter;
156                 uint32_t chksum;
157
158                 iter = (uint32_t *)buf;
159                 chksum = 0;
160                 for (cnt = 0; cnt < ((count >> 2) - 1); cnt++)
161                         chksum += le32_to_cpu(*iter++);
162                 chksum = ~chksum + 1;
163                 *iter = cpu_to_le32(chksum);
164         } else {
165                 uint8_t *iter;
166                 uint8_t chksum;
167
168                 iter = (uint8_t *)buf;
169                 chksum = 0;
170                 for (cnt = 0; cnt < count - 1; cnt++)
171                         chksum += *iter++;
172                 chksum = ~chksum + 1;
173                 *iter = chksum;
174         }
175
176         /* Write NVRAM. */
177         spin_lock_irqsave(&ha->hardware_lock, flags);
178         ha->isp_ops.write_nvram(ha, (uint8_t *)buf, ha->nvram_base, count);
179         spin_unlock_irqrestore(&ha->hardware_lock, flags);
180
181         return (count);
182 }
183
184 static struct bin_attribute sysfs_nvram_attr = {
185         .attr = {
186                 .name = "nvram",
187                 .mode = S_IRUSR | S_IWUSR,
188                 .owner = THIS_MODULE,
189         },
190         .size = 0,
191         .read = qla2x00_sysfs_read_nvram,
192         .write = qla2x00_sysfs_write_nvram,
193 };
194
195 void
196 qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
197 {
198         struct Scsi_Host *host = ha->host;
199
200         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
201         sysfs_nvram_attr.size = ha->nvram_size;
202         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
203 }
204
205 void
206 qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
207 {
208         struct Scsi_Host *host = ha->host;
209
210         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
211         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
212 }
213
214 /* Host attributes. */
215
216 static void
217 qla2x00_get_host_port_id(struct Scsi_Host *shost)
218 {
219         scsi_qla_host_t *ha = to_qla_host(shost);
220
221         fc_host_port_id(shost) = ha->d_id.b.domain << 16 |
222             ha->d_id.b.area << 8 | ha->d_id.b.al_pa;
223 }
224
225 static void
226 qla2x00_get_starget_node_name(struct scsi_target *starget)
227 {
228         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
229         scsi_qla_host_t *ha = to_qla_host(host);
230         fc_port_t *fcport;
231         uint64_t node_name = 0;
232
233         list_for_each_entry(fcport, &ha->fcports, list) {
234                 if (starget->id == fcport->os_target_id) {
235                         node_name = *(uint64_t *)fcport->node_name;
236                         break;
237                 }
238         }
239
240         fc_starget_node_name(starget) = be64_to_cpu(node_name);
241 }
242
243 static void
244 qla2x00_get_starget_port_name(struct scsi_target *starget)
245 {
246         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
247         scsi_qla_host_t *ha = to_qla_host(host);
248         fc_port_t *fcport;
249         uint64_t port_name = 0;
250
251         list_for_each_entry(fcport, &ha->fcports, list) {
252                 if (starget->id == fcport->os_target_id) {
253                         port_name = *(uint64_t *)fcport->port_name;
254                         break;
255                 }
256         }
257
258         fc_starget_port_name(starget) = be64_to_cpu(port_name);
259 }
260
261 static void
262 qla2x00_get_starget_port_id(struct scsi_target *starget)
263 {
264         struct Scsi_Host *host = dev_to_shost(starget->dev.parent);
265         scsi_qla_host_t *ha = to_qla_host(host);
266         fc_port_t *fcport;
267         uint32_t port_id = ~0U;
268
269         list_for_each_entry(fcport, &ha->fcports, list) {
270                 if (starget->id == fcport->os_target_id) {
271                         port_id = fcport->d_id.b.domain << 16 |
272                             fcport->d_id.b.area << 8 | fcport->d_id.b.al_pa;
273                         break;
274                 }
275         }
276
277         fc_starget_port_id(starget) = port_id;
278 }
279
280 static void
281 qla2x00_get_rport_loss_tmo(struct fc_rport *rport)
282 {
283         struct Scsi_Host *host = rport_to_shost(rport);
284         scsi_qla_host_t *ha = to_qla_host(host);
285
286         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
287 }
288
289 static void
290 qla2x00_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
291 {
292         struct Scsi_Host *host = rport_to_shost(rport);
293         scsi_qla_host_t *ha = to_qla_host(host);
294
295         if (timeout)
296                 ha->port_down_retry_count = timeout;
297         else
298                 ha->port_down_retry_count = 1;
299
300         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
301 }
302
303 struct fc_function_template qla2xxx_transport_functions = {
304
305         .show_host_node_name = 1,
306         .show_host_port_name = 1,
307         .get_host_port_id = qla2x00_get_host_port_id,
308         .show_host_port_id = 1,
309
310         .dd_fcrport_size = sizeof(struct fc_port *),
311
312         .get_starget_node_name = qla2x00_get_starget_node_name,
313         .show_starget_node_name = 1,
314         .get_starget_port_name = qla2x00_get_starget_port_name,
315         .show_starget_port_name = 1,
316         .get_starget_port_id  = qla2x00_get_starget_port_id,
317         .show_starget_port_id = 1,
318
319         .get_rport_dev_loss_tmo = qla2x00_get_rport_loss_tmo,
320         .set_rport_dev_loss_tmo = qla2x00_set_rport_loss_tmo,
321         .show_rport_dev_loss_tmo = 1,
322
323 };
324
325 void
326 qla2x00_init_host_attr(scsi_qla_host_t *ha)
327 {
328         fc_host_node_name(ha->host) =
329             be64_to_cpu(*(uint64_t *)ha->init_cb->node_name);
330         fc_host_port_name(ha->host) =
331             be64_to_cpu(*(uint64_t *)ha->init_cb->port_name);
332 }