summaryrefslogtreecommitdiffstats
path: root/drivers/misc/genwqe/card_sysfs.c
blob: c24c9b7c1dd374eed51254d647dce21fd2587ec8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
/**
 * IBM Accelerator Family 'GenWQE'
 *
 * (C) Copyright IBM Corp. 2013
 *
 * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
 * Author: Michael Jung <mijung@gmx.net>
 * Author: Michael Ruettger <michael@ibmra.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

/*
 * Sysfs interfaces for the GenWQE card. There are attributes to query
 * the version of the bitstream as well as some for the driver. For
 * debugging, please also see the debugfs interfaces of this driver.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/sysfs.h>
#include <linux/ctype.h>
#include <linux/device.h>

#include "card_base.h"
#include "card_ddcb.h"

static const char * const genwqe_types[] = {
	[GENWQE_TYPE_ALTERA_230] = "GenWQE4-230",
	[GENWQE_TYPE_ALTERA_530] = "GenWQE4-530",
	[GENWQE_TYPE_ALTERA_A4]  = "GenWQE5-A4",
	[GENWQE_TYPE_ALTERA_A7]  = "GenWQE5-A7",
};

static ssize_t status_show(struct device *dev, struct device_attribute *attr,
			   char *buf)
{
	struct genwqe_dev *cd = dev_get_drvdata(dev);
	const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" };

	return sprintf(buf, "%s\n", cs[cd->card_state]);
}
static DEVICE_ATTR_RO(status);

static ssize_t appid_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	char app_name[5];
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	genwqe_read_app_id(cd, app_name, sizeof(app_name));
	return sprintf(buf, "%s\n", app_name);
}
static DEVICE_ATTR_RO(appid);

static ssize_t version_show(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	u64 slu_id, app_id;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
	app_id = __genwqe_readq(cd, IO_APP_UNITCFG);

	return sprintf(buf, "%016llx.%016llx\n", slu_id, app_id);
}
static DEVICE_ATTR_RO(version);

static ssize_t type_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	u8 card_type;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	card_type = genwqe_card_type(cd);
	return sprintf(buf, "%s\n", (card_type >= ARRAY_SIZE(genwqe_types)) ?
		       "invalid" : genwqe_types[card_type]);
}
static DEVICE_ATTR_RO(type);

static ssize_t tempsens_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	u64 tempsens;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR);
	return sprintf(buf, "%016llx\n", tempsens);
}
static DEVICE_ATTR_RO(tempsens);

static ssize_t freerunning_timer_show(struct device *dev,
				      struct device_attribute *attr,
				      char *buf)
{
	u64 t;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	t = __genwqe_readq(cd, IO_SLC_FREE_RUNNING_TIMER);
	return sprintf(buf, "%016llx\n", t);
}
static DEVICE_ATTR_RO(freerunning_timer);

static ssize_t queue_working_time_show(struct device *dev,
				       struct device_attribute *attr,
				       char *buf)
{
	u64 t;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	t = __genwqe_readq(cd, IO_SLC_QUEUE_WTIME);
	return sprintf(buf, "%016llx\n", t);
}
static DEVICE_ATTR_RO(queue_working_time);

static ssize_t base_clock_show(struct device *dev,
			       struct device_attribute *attr,
			       char *buf)
{
	u64 base_clock;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	base_clock = genwqe_base_clock_frequency(cd);
	return sprintf(buf, "%lld\n", base_clock);
}
static DEVICE_ATTR_RO(base_clock);

/**
 * curr_bitstream_show() - Show the current bitstream id
 *
 * There is a bug in some old versions of the CPLD which selects the
 * bitstream, which causes the IO_SLU_BITSTREAM register to report
 * unreliable data in very rare cases. This makes this sysfs
 * unreliable up to the point were a new CPLD version is being used.
 *
 * Unfortunately there is no automatic way yet to query the CPLD
 * version, such that you need to manually ensure via programming
 * tools that you have a recent version of the CPLD software.
 *
 * The proposed circumvention is to use a special recovery bitstream
 * on the backup partition (0) to identify problems while loading the
 * image.
 */
static ssize_t curr_bitstream_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	int curr_bitstream;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1;
	return sprintf(buf, "%d\n", curr_bitstream);
}
static DEVICE_ATTR_RO(curr_bitstream);

/**
 * next_bitstream_show() - Show the next activated bitstream
 *
 * IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF.
 */
static ssize_t next_bitstream_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	int next_bitstream;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	switch ((cd->softreset & 0xc) >> 2) {
	case 0x2:
		next_bitstream =  0;
		break;
	case 0x3:
		next_bitstream =  1;
		break;
	default:
		next_bitstream = -1;
		break;		/* error */
	}
	return sprintf(buf, "%d\n", next_bitstream);
}

static ssize_t next_bitstream_store(struct device *dev,
				    struct device_attribute *attr,
				    const char *buf, size_t count)
{
	int partition;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	if (kstrtoint(buf, 0, &partition) < 0)
		return -EINVAL;

	switch (partition) {
	case 0x0:
		cd->softreset = 0x78;
		break;
	case 0x1:
		cd->softreset = 0x7c;
		break;
	default:
		return -EINVAL;
	}

	__genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset);
	return count;
}
static DEVICE_ATTR_RW(next_bitstream);

static ssize_t reload_bitstream_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	int reload;
	struct genwqe_dev *cd = dev_get_drvdata(dev);

	if (kstrtoint(buf, 0, &reload) < 0)
		return -EINVAL;

	if (reload == 0x1) {
		if (cd->card_state == GENWQE_CARD_UNUSED ||
		    cd->card_state == GENWQE_CARD_USED)
			cd->card_state = GENWQE_CARD_RELOAD_BITSTREAM;
		else
			return -EIO;
	} else {
		return -EINVAL;
	}

	return count;
}
static DEVICE_ATTR_WO(reload_bitstream);

/*
 * Create device_attribute structures / params: name, mode, show, store
 * additional flag if valid in VF
 */
static struct attribute *genwqe_attributes[] = {
	&dev_attr_tempsens.attr,
	&dev_attr_next_bitstream.attr,
	&dev_attr_curr_bitstream.attr,
	&dev_attr_base_clock.attr,
	&dev_attr_type.attr,
	&dev_attr_version.attr,
	&dev_attr_appid.attr,
	&dev_attr_status.attr,
	&dev_attr_freerunning_timer.attr,
	&dev_attr_queue_working_time.attr,
	&dev_attr_reload_bitstream.attr,
	NULL,
};

static struct attribute *genwqe_normal_attributes[] = {
	&dev_attr_type.attr,
	&dev_attr_version.attr,
	&dev_attr_appid.attr,
	&dev_attr_status.attr,
	&dev_attr_freerunning_timer.attr,
	&dev_attr_queue_working_time.attr,
	NULL,
};

/**
 * genwqe_is_visible() - Determine if sysfs attribute should be visible or not
 *
 * VFs have restricted mmio capabilities, so not all sysfs entries
 * are allowed in VFs.
 */
static umode_t genwqe_is_visible(struct kobject *kobj,
				 struct attribute *attr, int n)
{
	unsigned int j;
	struct device *dev = kobj_to_dev(kobj);
	struct genwqe_dev *cd = dev_get_drvdata(dev);
	umode_t mode = attr->mode;

	if (genwqe_is_privileged(cd))
		return mode;

	for (j = 0; genwqe_normal_attributes[j] != NULL;  j++)
		if (genwqe_normal_attributes[j] == attr)
			return mode;

	return 0;
}

static struct attribute_group genwqe_attribute_group = {
	.is_visible = genwqe_is_visible,
	.attrs      = genwqe_attributes,
};

const struct attribute_group *genwqe_attribute_groups[] = {
	&genwqe_attribute_group,
	NULL,
};
OpenPOWER on IntegriCloud