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1 | /** |
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> | |
8 | * Author: Michael Jung <mijung@de.ibm.com> | |
9 | * 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 | ||
27 | #include <linux/version.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/fs.h> | |
34 | #include <linux/sysfs.h> | |
35 | #include <linux/ctype.h> | |
36 | #include <linux/device.h> | |
37 | ||
38 | #include "card_base.h" | |
39 | #include "card_ddcb.h" | |
40 | ||
41 | static const char * const genwqe_types[] = { | |
42 | [GENWQE_TYPE_ALTERA_230] = "GenWQE4-230", | |
43 | [GENWQE_TYPE_ALTERA_530] = "GenWQE4-530", | |
44 | [GENWQE_TYPE_ALTERA_A4] = "GenWQE5-A4", | |
45 | [GENWQE_TYPE_ALTERA_A7] = "GenWQE5-A7", | |
46 | }; | |
47 | ||
48 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, | |
49 | char *buf) | |
50 | { | |
51 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
52 | const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" }; | |
53 | ||
54 | return sprintf(buf, "%s\n", cs[cd->card_state]); | |
55 | } | |
56 | static DEVICE_ATTR_RO(status); | |
57 | ||
58 | static ssize_t appid_show(struct device *dev, struct device_attribute *attr, | |
59 | char *buf) | |
60 | { | |
61 | char app_name[5]; | |
62 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
63 | ||
64 | genwqe_read_app_id(cd, app_name, sizeof(app_name)); | |
65 | return sprintf(buf, "%s\n", app_name); | |
66 | } | |
67 | static DEVICE_ATTR_RO(appid); | |
68 | ||
69 | static ssize_t version_show(struct device *dev, struct device_attribute *attr, | |
70 | char *buf) | |
71 | { | |
72 | u64 slu_id, app_id; | |
73 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
74 | ||
75 | slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG); | |
76 | app_id = __genwqe_readq(cd, IO_APP_UNITCFG); | |
77 | ||
78 | return sprintf(buf, "%016llx.%016llx\n", slu_id, app_id); | |
79 | } | |
80 | static DEVICE_ATTR_RO(version); | |
81 | ||
82 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, | |
83 | char *buf) | |
84 | { | |
85 | u8 card_type; | |
86 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
87 | ||
88 | card_type = genwqe_card_type(cd); | |
89 | return sprintf(buf, "%s\n", (card_type >= ARRAY_SIZE(genwqe_types)) ? | |
90 | "invalid" : genwqe_types[card_type]); | |
91 | } | |
92 | static DEVICE_ATTR_RO(type); | |
93 | ||
94 | static ssize_t driver_show(struct device *dev, struct device_attribute *attr, | |
95 | char *buf) | |
96 | { | |
97 | return sprintf(buf, "%s\n", DRV_VERS_STRING); | |
98 | } | |
99 | static DEVICE_ATTR_RO(driver); | |
100 | ||
101 | static ssize_t tempsens_show(struct device *dev, struct device_attribute *attr, | |
102 | char *buf) | |
103 | { | |
104 | u64 tempsens; | |
105 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
106 | ||
107 | tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR); | |
108 | return sprintf(buf, "%016llx\n", tempsens); | |
109 | } | |
110 | static DEVICE_ATTR_RO(tempsens); | |
111 | ||
112 | static ssize_t freerunning_timer_show(struct device *dev, | |
113 | struct device_attribute *attr, | |
114 | char *buf) | |
115 | { | |
116 | u64 t; | |
117 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
118 | ||
119 | t = __genwqe_readq(cd, IO_SLC_FREE_RUNNING_TIMER); | |
120 | return sprintf(buf, "%016llx\n", t); | |
121 | } | |
122 | static DEVICE_ATTR_RO(freerunning_timer); | |
123 | ||
124 | static ssize_t queue_working_time_show(struct device *dev, | |
125 | struct device_attribute *attr, | |
126 | char *buf) | |
127 | { | |
128 | u64 t; | |
129 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
130 | ||
131 | t = __genwqe_readq(cd, IO_SLC_QUEUE_WTIME); | |
132 | return sprintf(buf, "%016llx\n", t); | |
133 | } | |
134 | static DEVICE_ATTR_RO(queue_working_time); | |
135 | ||
136 | static ssize_t base_clock_show(struct device *dev, | |
137 | struct device_attribute *attr, | |
138 | char *buf) | |
139 | { | |
140 | u64 base_clock; | |
141 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
142 | ||
143 | base_clock = genwqe_base_clock_frequency(cd); | |
144 | return sprintf(buf, "%lld\n", base_clock); | |
145 | } | |
146 | static DEVICE_ATTR_RO(base_clock); | |
147 | ||
148 | /** | |
149 | * curr_bitstream_show() - Show the current bitstream id | |
150 | * | |
151 | * There is a bug in some old versions of the CPLD which selects the | |
152 | * bitstream, which causes the IO_SLU_BITSTREAM register to report | |
153 | * unreliable data in very rare cases. This makes this sysfs | |
154 | * unreliable up to the point were a new CPLD version is being used. | |
155 | * | |
156 | * Unfortunately there is no automatic way yet to query the CPLD | |
157 | * version, such that you need to manually ensure via programming | |
158 | * tools that you have a recent version of the CPLD software. | |
159 | * | |
160 | * The proposed circumvention is to use a special recovery bitstream | |
161 | * on the backup partition (0) to identify problems while loading the | |
162 | * image. | |
163 | */ | |
164 | static ssize_t curr_bitstream_show(struct device *dev, | |
165 | struct device_attribute *attr, char *buf) | |
166 | { | |
167 | int curr_bitstream; | |
168 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
169 | ||
170 | curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1; | |
171 | return sprintf(buf, "%d\n", curr_bitstream); | |
172 | } | |
173 | static DEVICE_ATTR_RO(curr_bitstream); | |
174 | ||
175 | /** | |
176 | * next_bitstream_show() - Show the next activated bitstream | |
177 | * | |
178 | * IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF. | |
179 | */ | |
180 | static ssize_t next_bitstream_show(struct device *dev, | |
181 | struct device_attribute *attr, char *buf) | |
182 | { | |
183 | int next_bitstream; | |
184 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
185 | ||
186 | switch ((cd->softreset & 0xc) >> 2) { | |
187 | case 0x2: | |
188 | next_bitstream = 0; | |
189 | break; | |
190 | case 0x3: | |
191 | next_bitstream = 1; | |
192 | break; | |
193 | default: | |
194 | next_bitstream = -1; | |
195 | break; /* error */ | |
196 | } | |
197 | return sprintf(buf, "%d\n", next_bitstream); | |
198 | } | |
199 | ||
200 | static ssize_t next_bitstream_store(struct device *dev, | |
201 | struct device_attribute *attr, | |
202 | const char *buf, size_t count) | |
203 | { | |
204 | int partition; | |
205 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
206 | ||
207 | if (kstrtoint(buf, 0, &partition) < 0) | |
208 | return -EINVAL; | |
209 | ||
210 | switch (partition) { | |
211 | case 0x0: | |
212 | cd->softreset = 0x78; | |
213 | break; | |
214 | case 0x1: | |
215 | cd->softreset = 0x7c; | |
216 | break; | |
217 | default: | |
218 | return -EINVAL; | |
219 | } | |
220 | ||
221 | __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset); | |
222 | return count; | |
223 | } | |
224 | static DEVICE_ATTR_RW(next_bitstream); | |
225 | ||
226 | /* | |
227 | * Create device_attribute structures / params: name, mode, show, store | |
228 | * additional flag if valid in VF | |
229 | */ | |
230 | static struct attribute *genwqe_attributes[] = { | |
231 | &dev_attr_tempsens.attr, | |
232 | &dev_attr_next_bitstream.attr, | |
233 | &dev_attr_curr_bitstream.attr, | |
234 | &dev_attr_base_clock.attr, | |
235 | &dev_attr_driver.attr, | |
236 | &dev_attr_type.attr, | |
237 | &dev_attr_version.attr, | |
238 | &dev_attr_appid.attr, | |
239 | &dev_attr_status.attr, | |
240 | &dev_attr_freerunning_timer.attr, | |
241 | &dev_attr_queue_working_time.attr, | |
242 | NULL, | |
243 | }; | |
244 | ||
245 | static struct attribute *genwqe_normal_attributes[] = { | |
246 | &dev_attr_driver.attr, | |
247 | &dev_attr_type.attr, | |
248 | &dev_attr_version.attr, | |
249 | &dev_attr_appid.attr, | |
250 | &dev_attr_status.attr, | |
251 | &dev_attr_freerunning_timer.attr, | |
252 | &dev_attr_queue_working_time.attr, | |
253 | NULL, | |
254 | }; | |
255 | ||
256 | /** | |
257 | * genwqe_is_visible() - Determine if sysfs attribute should be visible or not | |
258 | * | |
259 | * VFs have restricted mmio capabilities, so not all sysfs entries | |
260 | * are allowed in VFs. | |
261 | */ | |
262 | static umode_t genwqe_is_visible(struct kobject *kobj, | |
263 | struct attribute *attr, int n) | |
264 | { | |
265 | unsigned int j; | |
266 | struct device *dev = container_of(kobj, struct device, kobj); | |
267 | struct genwqe_dev *cd = dev_get_drvdata(dev); | |
268 | umode_t mode = attr->mode; | |
269 | ||
270 | if (genwqe_is_privileged(cd)) | |
271 | return mode; | |
272 | ||
273 | for (j = 0; genwqe_normal_attributes[j] != NULL; j++) | |
274 | if (genwqe_normal_attributes[j] == attr) | |
275 | return mode; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static struct attribute_group genwqe_attribute_group = { | |
281 | .is_visible = genwqe_is_visible, | |
282 | .attrs = genwqe_attributes, | |
283 | }; | |
284 | ||
285 | const struct attribute_group *genwqe_attribute_groups[] = { | |
286 | &genwqe_attribute_group, | |
287 | NULL, | |
288 | }; |