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Frank Haverkampb2a65132013-12-09 13:30:43 +01001/**
2 * IBM Accelerator Family 'GenWQE'
3 *
4 * (C) Copyright IBM Corp. 2013
5 *
6 * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
7 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
Frank Haverkamp26d8f6f2014-09-10 16:37:48 +02008 * Author: Michael Jung <mijung@gmx.net>
Frank Haverkampb2a65132013-12-09 13:30:43 +01009 * Author: Michael Ruettger <michael@ibmra.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License (version 2 only)
13 * as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 */
20
21/*
22 * Sysfs interfaces for the GenWQE card. There are attributes to query
23 * the version of the bitstream as well as some for the driver. For
24 * debugging, please also see the debugfs interfaces of this driver.
25 */
26
Frank Haverkampb2a65132013-12-09 13:30:43 +010027#include <linux/kernel.h>
28#include <linux/types.h>
29#include <linux/module.h>
30#include <linux/pci.h>
31#include <linux/string.h>
32#include <linux/fs.h>
33#include <linux/sysfs.h>
34#include <linux/ctype.h>
35#include <linux/device.h>
36
37#include "card_base.h"
38#include "card_ddcb.h"
39
40static const char * const genwqe_types[] = {
41 [GENWQE_TYPE_ALTERA_230] = "GenWQE4-230",
42 [GENWQE_TYPE_ALTERA_530] = "GenWQE4-530",
43 [GENWQE_TYPE_ALTERA_A4] = "GenWQE5-A4",
44 [GENWQE_TYPE_ALTERA_A7] = "GenWQE5-A7",
45};
46
47static ssize_t status_show(struct device *dev, struct device_attribute *attr,
48 char *buf)
49{
50 struct genwqe_dev *cd = dev_get_drvdata(dev);
51 const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" };
52
53 return sprintf(buf, "%s\n", cs[cd->card_state]);
54}
55static DEVICE_ATTR_RO(status);
56
57static ssize_t appid_show(struct device *dev, struct device_attribute *attr,
58 char *buf)
59{
60 char app_name[5];
61 struct genwqe_dev *cd = dev_get_drvdata(dev);
62
63 genwqe_read_app_id(cd, app_name, sizeof(app_name));
64 return sprintf(buf, "%s\n", app_name);
65}
66static DEVICE_ATTR_RO(appid);
67
68static ssize_t version_show(struct device *dev, struct device_attribute *attr,
69 char *buf)
70{
71 u64 slu_id, app_id;
72 struct genwqe_dev *cd = dev_get_drvdata(dev);
73
74 slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
75 app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
76
77 return sprintf(buf, "%016llx.%016llx\n", slu_id, app_id);
78}
79static DEVICE_ATTR_RO(version);
80
81static ssize_t type_show(struct device *dev, struct device_attribute *attr,
82 char *buf)
83{
84 u8 card_type;
85 struct genwqe_dev *cd = dev_get_drvdata(dev);
86
87 card_type = genwqe_card_type(cd);
88 return sprintf(buf, "%s\n", (card_type >= ARRAY_SIZE(genwqe_types)) ?
89 "invalid" : genwqe_types[card_type]);
90}
91static DEVICE_ATTR_RO(type);
92
Frank Haverkampb2a65132013-12-09 13:30:43 +010093static ssize_t tempsens_show(struct device *dev, struct device_attribute *attr,
94 char *buf)
95{
96 u64 tempsens;
97 struct genwqe_dev *cd = dev_get_drvdata(dev);
98
99 tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR);
100 return sprintf(buf, "%016llx\n", tempsens);
101}
102static DEVICE_ATTR_RO(tempsens);
103
104static ssize_t freerunning_timer_show(struct device *dev,
105 struct device_attribute *attr,
106 char *buf)
107{
108 u64 t;
109 struct genwqe_dev *cd = dev_get_drvdata(dev);
110
111 t = __genwqe_readq(cd, IO_SLC_FREE_RUNNING_TIMER);
112 return sprintf(buf, "%016llx\n", t);
113}
114static DEVICE_ATTR_RO(freerunning_timer);
115
116static ssize_t queue_working_time_show(struct device *dev,
117 struct device_attribute *attr,
118 char *buf)
119{
120 u64 t;
121 struct genwqe_dev *cd = dev_get_drvdata(dev);
122
123 t = __genwqe_readq(cd, IO_SLC_QUEUE_WTIME);
124 return sprintf(buf, "%016llx\n", t);
125}
126static DEVICE_ATTR_RO(queue_working_time);
127
128static ssize_t base_clock_show(struct device *dev,
129 struct device_attribute *attr,
130 char *buf)
131{
132 u64 base_clock;
133 struct genwqe_dev *cd = dev_get_drvdata(dev);
134
135 base_clock = genwqe_base_clock_frequency(cd);
136 return sprintf(buf, "%lld\n", base_clock);
137}
138static DEVICE_ATTR_RO(base_clock);
139
140/**
141 * curr_bitstream_show() - Show the current bitstream id
142 *
143 * There is a bug in some old versions of the CPLD which selects the
144 * bitstream, which causes the IO_SLU_BITSTREAM register to report
145 * unreliable data in very rare cases. This makes this sysfs
146 * unreliable up to the point were a new CPLD version is being used.
147 *
148 * Unfortunately there is no automatic way yet to query the CPLD
149 * version, such that you need to manually ensure via programming
150 * tools that you have a recent version of the CPLD software.
151 *
152 * The proposed circumvention is to use a special recovery bitstream
153 * on the backup partition (0) to identify problems while loading the
154 * image.
155 */
156static ssize_t curr_bitstream_show(struct device *dev,
157 struct device_attribute *attr, char *buf)
158{
159 int curr_bitstream;
160 struct genwqe_dev *cd = dev_get_drvdata(dev);
161
162 curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1;
163 return sprintf(buf, "%d\n", curr_bitstream);
164}
165static DEVICE_ATTR_RO(curr_bitstream);
166
167/**
168 * next_bitstream_show() - Show the next activated bitstream
169 *
170 * IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF.
171 */
172static ssize_t next_bitstream_show(struct device *dev,
173 struct device_attribute *attr, char *buf)
174{
175 int next_bitstream;
176 struct genwqe_dev *cd = dev_get_drvdata(dev);
177
178 switch ((cd->softreset & 0xc) >> 2) {
179 case 0x2:
180 next_bitstream = 0;
181 break;
182 case 0x3:
183 next_bitstream = 1;
184 break;
185 default:
186 next_bitstream = -1;
187 break; /* error */
188 }
189 return sprintf(buf, "%d\n", next_bitstream);
190}
191
192static ssize_t next_bitstream_store(struct device *dev,
193 struct device_attribute *attr,
194 const char *buf, size_t count)
195{
196 int partition;
197 struct genwqe_dev *cd = dev_get_drvdata(dev);
198
199 if (kstrtoint(buf, 0, &partition) < 0)
200 return -EINVAL;
201
202 switch (partition) {
203 case 0x0:
204 cd->softreset = 0x78;
205 break;
206 case 0x1:
207 cd->softreset = 0x7c;
208 break;
209 default:
210 return -EINVAL;
211 }
212
213 __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset);
214 return count;
215}
216static DEVICE_ATTR_RW(next_bitstream);
217
Kleber Sacilotto de Souzac1f732a2014-06-04 10:57:50 -0300218static ssize_t reload_bitstream_store(struct device *dev,
219 struct device_attribute *attr,
220 const char *buf, size_t count)
221{
222 int reload;
223 struct genwqe_dev *cd = dev_get_drvdata(dev);
224
225 if (kstrtoint(buf, 0, &reload) < 0)
226 return -EINVAL;
227
228 if (reload == 0x1) {
229 if (cd->card_state == GENWQE_CARD_UNUSED ||
230 cd->card_state == GENWQE_CARD_USED)
231 cd->card_state = GENWQE_CARD_RELOAD_BITSTREAM;
232 else
233 return -EIO;
234 } else {
235 return -EINVAL;
236 }
237
238 return count;
239}
240static DEVICE_ATTR_WO(reload_bitstream);
241
Frank Haverkampb2a65132013-12-09 13:30:43 +0100242/*
243 * Create device_attribute structures / params: name, mode, show, store
244 * additional flag if valid in VF
245 */
246static struct attribute *genwqe_attributes[] = {
247 &dev_attr_tempsens.attr,
248 &dev_attr_next_bitstream.attr,
249 &dev_attr_curr_bitstream.attr,
250 &dev_attr_base_clock.attr,
Frank Haverkampb2a65132013-12-09 13:30:43 +0100251 &dev_attr_type.attr,
252 &dev_attr_version.attr,
253 &dev_attr_appid.attr,
254 &dev_attr_status.attr,
255 &dev_attr_freerunning_timer.attr,
256 &dev_attr_queue_working_time.attr,
Kleber Sacilotto de Souzac1f732a2014-06-04 10:57:50 -0300257 &dev_attr_reload_bitstream.attr,
Frank Haverkampb2a65132013-12-09 13:30:43 +0100258 NULL,
259};
260
261static struct attribute *genwqe_normal_attributes[] = {
Frank Haverkampb2a65132013-12-09 13:30:43 +0100262 &dev_attr_type.attr,
263 &dev_attr_version.attr,
264 &dev_attr_appid.attr,
265 &dev_attr_status.attr,
266 &dev_attr_freerunning_timer.attr,
267 &dev_attr_queue_working_time.attr,
268 NULL,
269};
270
271/**
272 * genwqe_is_visible() - Determine if sysfs attribute should be visible or not
273 *
274 * VFs have restricted mmio capabilities, so not all sysfs entries
275 * are allowed in VFs.
276 */
277static umode_t genwqe_is_visible(struct kobject *kobj,
278 struct attribute *attr, int n)
279{
280 unsigned int j;
281 struct device *dev = container_of(kobj, struct device, kobj);
282 struct genwqe_dev *cd = dev_get_drvdata(dev);
283 umode_t mode = attr->mode;
284
285 if (genwqe_is_privileged(cd))
286 return mode;
287
288 for (j = 0; genwqe_normal_attributes[j] != NULL; j++)
289 if (genwqe_normal_attributes[j] == attr)
290 return mode;
291
292 return 0;
293}
294
295static struct attribute_group genwqe_attribute_group = {
296 .is_visible = genwqe_is_visible,
297 .attrs = genwqe_attributes,
298};
299
300const struct attribute_group *genwqe_attribute_groups[] = {
301 &genwqe_attribute_group,
302 NULL,
303};