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Merge tag 'trace-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux/fpc-iii.git] / drivers / fpga / dfl-fme-main.c
blob77ea04d4edbef52cbe272c500448924e5d1785d9
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Driver for FPGA Management Engine (FME)
4 *
5 * Copyright (C) 2017-2018 Intel Corporation, Inc.
6 *
7 * Authors:
8 * Kang Luwei <luwei.kang@intel.com>
9 * Xiao Guangrong <guangrong.xiao@linux.intel.com>
10 * Joseph Grecco <joe.grecco@intel.com>
11 * Enno Luebbers <enno.luebbers@intel.com>
12 * Tim Whisonant <tim.whisonant@intel.com>
13 * Ananda Ravuri <ananda.ravuri@intel.com>
14 * Henry Mitchel <henry.mitchel@intel.com>
15 */
16
17 #include <linux/hwmon.h>
18 #include <linux/hwmon-sysfs.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/uaccess.h>
22 #include <linux/fpga-dfl.h>
23
24 #include "dfl.h"
25 #include "dfl-fme.h"
26
27 static ssize_t ports_num_show(struct device *dev,
28 struct device_attribute *attr, char *buf)
29 {
30 void __iomem *base;
31 u64 v;
32
33 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
34
35 v = readq(base + FME_HDR_CAP);
36
37 return scnprintf(buf, PAGE_SIZE, "%u\n",
38 (unsigned int)FIELD_GET(FME_CAP_NUM_PORTS, v));
39 }
40 static DEVICE_ATTR_RO(ports_num);
41
42 /*
43 * Bitstream (static FPGA region) identifier number. It contains the
44 * detailed version and other information of this static FPGA region.
45 */
46 static ssize_t bitstream_id_show(struct device *dev,
47 struct device_attribute *attr, char *buf)
48 {
49 void __iomem *base;
50 u64 v;
51
52 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
53
54 v = readq(base + FME_HDR_BITSTREAM_ID);
55
56 return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v);
57 }
58 static DEVICE_ATTR_RO(bitstream_id);
59
60 /*
61 * Bitstream (static FPGA region) meta data. It contains the synthesis
62 * date, seed and other information of this static FPGA region.
63 */
64 static ssize_t bitstream_metadata_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66 {
67 void __iomem *base;
68 u64 v;
69
70 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
71
72 v = readq(base + FME_HDR_BITSTREAM_MD);
73
74 return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v);
75 }
76 static DEVICE_ATTR_RO(bitstream_metadata);
77
78 static ssize_t cache_size_show(struct device *dev,
79 struct device_attribute *attr, char *buf)
80 {
81 void __iomem *base;
82 u64 v;
83
84 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
85
86 v = readq(base + FME_HDR_CAP);
87
88 return sprintf(buf, "%u\n",
89 (unsigned int)FIELD_GET(FME_CAP_CACHE_SIZE, v));
90 }
91 static DEVICE_ATTR_RO(cache_size);
92
93 static ssize_t fabric_version_show(struct device *dev,
94 struct device_attribute *attr, char *buf)
95 {
96 void __iomem *base;
97 u64 v;
98
99 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
100
101 v = readq(base + FME_HDR_CAP);
102
103 return sprintf(buf, "%u\n",
104 (unsigned int)FIELD_GET(FME_CAP_FABRIC_VERID, v));
105 }
106 static DEVICE_ATTR_RO(fabric_version);
107
108 static ssize_t socket_id_show(struct device *dev,
109 struct device_attribute *attr, char *buf)
110 {
111 void __iomem *base;
112 u64 v;
113
114 base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
115
116 v = readq(base + FME_HDR_CAP);
117
118 return sprintf(buf, "%u\n",
119 (unsigned int)FIELD_GET(FME_CAP_SOCKET_ID, v));
120 }
121 static DEVICE_ATTR_RO(socket_id);
122
123 static struct attribute *fme_hdr_attrs[] = {
124 &dev_attr_ports_num.attr,
125 &dev_attr_bitstream_id.attr,
126 &dev_attr_bitstream_metadata.attr,
127 &dev_attr_cache_size.attr,
128 &dev_attr_fabric_version.attr,
129 &dev_attr_socket_id.attr,
130 NULL,
131 };
132
133 static const struct attribute_group fme_hdr_group = {
134 .attrs = fme_hdr_attrs,
135 };
136
137 static long fme_hdr_ioctl_release_port(struct dfl_feature_platform_data *pdata,
138 unsigned long arg)
139 {
140 struct dfl_fpga_cdev *cdev = pdata->dfl_cdev;
141 int port_id;
142
143 if (get_user(port_id, (int __user *)arg))
144 return -EFAULT;
145
146 return dfl_fpga_cdev_release_port(cdev, port_id);
147 }
148
149 static long fme_hdr_ioctl_assign_port(struct dfl_feature_platform_data *pdata,
150 unsigned long arg)
151 {
152 struct dfl_fpga_cdev *cdev = pdata->dfl_cdev;
153 int port_id;
154
155 if (get_user(port_id, (int __user *)arg))
156 return -EFAULT;
157
158 return dfl_fpga_cdev_assign_port(cdev, port_id);
159 }
160
161 static long fme_hdr_ioctl(struct platform_device *pdev,
162 struct dfl_feature *feature,
163 unsigned int cmd, unsigned long arg)
164 {
165 struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
166
167 switch (cmd) {
168 case DFL_FPGA_FME_PORT_RELEASE:
169 return fme_hdr_ioctl_release_port(pdata, arg);
170 case DFL_FPGA_FME_PORT_ASSIGN:
171 return fme_hdr_ioctl_assign_port(pdata, arg);
172 }
173
174 return -ENODEV;
175 }
176
177 static const struct dfl_feature_id fme_hdr_id_table[] = {
178 {.id = FME_FEATURE_ID_HEADER,},
179 {0,}
180 };
181
182 static const struct dfl_feature_ops fme_hdr_ops = {
183 .ioctl = fme_hdr_ioctl,
184 };
185
186 #define FME_THERM_THRESHOLD 0x8
187 #define TEMP_THRESHOLD1 GENMASK_ULL(6, 0)
188 #define TEMP_THRESHOLD1_EN BIT_ULL(7)
189 #define TEMP_THRESHOLD2 GENMASK_ULL(14, 8)
190 #define TEMP_THRESHOLD2_EN BIT_ULL(15)
191 #define TRIP_THRESHOLD GENMASK_ULL(30, 24)
192 #define TEMP_THRESHOLD1_STATUS BIT_ULL(32) /* threshold1 reached */
193 #define TEMP_THRESHOLD2_STATUS BIT_ULL(33) /* threshold2 reached */
194 /* threshold1 policy: 0 - AP2 (90% throttle) / 1 - AP1 (50% throttle) */
195 #define TEMP_THRESHOLD1_POLICY BIT_ULL(44)
196
197 #define FME_THERM_RDSENSOR_FMT1 0x10
198 #define FPGA_TEMPERATURE GENMASK_ULL(6, 0)
199
200 #define FME_THERM_CAP 0x20
201 #define THERM_NO_THROTTLE BIT_ULL(0)
202
203 #define MD_PRE_DEG
204
205 static bool fme_thermal_throttle_support(void __iomem *base)
206 {
207 u64 v = readq(base + FME_THERM_CAP);
208
209 return FIELD_GET(THERM_NO_THROTTLE, v) ? false : true;
210 }
211
212 static umode_t thermal_hwmon_attrs_visible(const void *drvdata,
213 enum hwmon_sensor_types type,
214 u32 attr, int channel)
215 {
216 const struct dfl_feature *feature = drvdata;
217
218 /* temperature is always supported, and check hardware cap for others */
219 if (attr == hwmon_temp_input)
220 return 0444;
221
222 return fme_thermal_throttle_support(feature->ioaddr) ? 0444 : 0;
223 }
224
225 static int thermal_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
226 u32 attr, int channel, long *val)
227 {
228 struct dfl_feature *feature = dev_get_drvdata(dev);
229 u64 v;
230
231 switch (attr) {
232 case hwmon_temp_input:
233 v = readq(feature->ioaddr + FME_THERM_RDSENSOR_FMT1);
234 *val = (long)(FIELD_GET(FPGA_TEMPERATURE, v) * 1000);
235 break;
236 case hwmon_temp_max:
237 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
238 *val = (long)(FIELD_GET(TEMP_THRESHOLD1, v) * 1000);
239 break;
240 case hwmon_temp_crit:
241 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
242 *val = (long)(FIELD_GET(TEMP_THRESHOLD2, v) * 1000);
243 break;
244 case hwmon_temp_emergency:
245 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
246 *val = (long)(FIELD_GET(TRIP_THRESHOLD, v) * 1000);
247 break;
248 case hwmon_temp_max_alarm:
249 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
250 *val = (long)FIELD_GET(TEMP_THRESHOLD1_STATUS, v);
251 break;
252 case hwmon_temp_crit_alarm:
253 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
254 *val = (long)FIELD_GET(TEMP_THRESHOLD2_STATUS, v);
255 break;
256 default:
257 return -EOPNOTSUPP;
258 }
259
260 return 0;
261 }
262
263 static const struct hwmon_ops thermal_hwmon_ops = {
264 .is_visible = thermal_hwmon_attrs_visible,
265 .read = thermal_hwmon_read,
266 };
267
268 static const struct hwmon_channel_info *thermal_hwmon_info[] = {
269 HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_EMERGENCY |
270 HWMON_T_MAX | HWMON_T_MAX_ALARM |
271 HWMON_T_CRIT | HWMON_T_CRIT_ALARM),
272 NULL
273 };
274
275 static const struct hwmon_chip_info thermal_hwmon_chip_info = {
276 .ops = &thermal_hwmon_ops,
277 .info = thermal_hwmon_info,
278 };
279
280 static ssize_t temp1_max_policy_show(struct device *dev,
281 struct device_attribute *attr, char *buf)
282 {
283 struct dfl_feature *feature = dev_get_drvdata(dev);
284 u64 v;
285
286 v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
287
288 return sprintf(buf, "%u\n",
289 (unsigned int)FIELD_GET(TEMP_THRESHOLD1_POLICY, v));
290 }
291
292 static DEVICE_ATTR_RO(temp1_max_policy);
293
294 static struct attribute *thermal_extra_attrs[] = {
295 &dev_attr_temp1_max_policy.attr,
296 NULL,
297 };
298
299 static umode_t thermal_extra_attrs_visible(struct kobject *kobj,
300 struct attribute *attr, int index)
301 {
302 struct device *dev = kobj_to_dev(kobj);
303 struct dfl_feature *feature = dev_get_drvdata(dev);
304
305 return fme_thermal_throttle_support(feature->ioaddr) ? attr->mode : 0;
306 }
307
308 static const struct attribute_group thermal_extra_group = {
309 .attrs = thermal_extra_attrs,
310 .is_visible = thermal_extra_attrs_visible,
311 };
312 __ATTRIBUTE_GROUPS(thermal_extra);
313
314 static int fme_thermal_mgmt_init(struct platform_device *pdev,
315 struct dfl_feature *feature)
316 {
317 struct device *hwmon;
318
319 /*
320 * create hwmon to allow userspace monitoring temperature and other
321 * threshold information.
322 *
323 * temp1_input -> FPGA device temperature
324 * temp1_max -> hardware threshold 1 -> 50% or 90% throttling
325 * temp1_crit -> hardware threshold 2 -> 100% throttling
326 * temp1_emergency -> hardware trip_threshold to shutdown FPGA
327 * temp1_max_alarm -> hardware threshold 1 alarm
328 * temp1_crit_alarm -> hardware threshold 2 alarm
329 *
330 * create device specific sysfs interfaces, e.g. read temp1_max_policy
331 * to understand the actual hardware throttling action (50% vs 90%).
332 *
333 * If hardware doesn't support automatic throttling per thresholds,
334 * then all above sysfs interfaces are not visible except temp1_input
335 * for temperature.
336 */
337 hwmon = devm_hwmon_device_register_with_info(&pdev->dev,
338 "dfl_fme_thermal", feature,
339 &thermal_hwmon_chip_info,
340 thermal_extra_groups);
341 if (IS_ERR(hwmon)) {
342 dev_err(&pdev->dev, "Fail to register thermal hwmon\n");
343 return PTR_ERR(hwmon);
344 }
345
346 return 0;
347 }
348
349 static const struct dfl_feature_id fme_thermal_mgmt_id_table[] = {
350 {.id = FME_FEATURE_ID_THERMAL_MGMT,},
351 {0,}
352 };
353
354 static const struct dfl_feature_ops fme_thermal_mgmt_ops = {
355 .init = fme_thermal_mgmt_init,
356 };
357
358 #define FME_PWR_STATUS 0x8
359 #define FME_LATENCY_TOLERANCE BIT_ULL(18)
360 #define PWR_CONSUMED GENMASK_ULL(17, 0)
361
362 #define FME_PWR_THRESHOLD 0x10
363 #define PWR_THRESHOLD1 GENMASK_ULL(6, 0) /* in Watts */
364 #define PWR_THRESHOLD2 GENMASK_ULL(14, 8) /* in Watts */
365 #define PWR_THRESHOLD_MAX 0x7f /* in Watts */
366 #define PWR_THRESHOLD1_STATUS BIT_ULL(16)
367 #define PWR_THRESHOLD2_STATUS BIT_ULL(17)
368
369 #define FME_PWR_XEON_LIMIT 0x18
370 #define XEON_PWR_LIMIT GENMASK_ULL(14, 0) /* in 0.1 Watts */
371 #define XEON_PWR_EN BIT_ULL(15)
372 #define FME_PWR_FPGA_LIMIT 0x20
373 #define FPGA_PWR_LIMIT GENMASK_ULL(14, 0) /* in 0.1 Watts */
374 #define FPGA_PWR_EN BIT_ULL(15)
375
376 static int power_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
377 u32 attr, int channel, long *val)
378 {
379 struct dfl_feature *feature = dev_get_drvdata(dev);
380 u64 v;
381
382 switch (attr) {
383 case hwmon_power_input:
384 v = readq(feature->ioaddr + FME_PWR_STATUS);
385 *val = (long)(FIELD_GET(PWR_CONSUMED, v) * 1000000);
386 break;
387 case hwmon_power_max:
388 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
389 *val = (long)(FIELD_GET(PWR_THRESHOLD1, v) * 1000000);
390 break;
391 case hwmon_power_crit:
392 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
393 *val = (long)(FIELD_GET(PWR_THRESHOLD2, v) * 1000000);
394 break;
395 case hwmon_power_max_alarm:
396 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
397 *val = (long)FIELD_GET(PWR_THRESHOLD1_STATUS, v);
398 break;
399 case hwmon_power_crit_alarm:
400 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
401 *val = (long)FIELD_GET(PWR_THRESHOLD2_STATUS, v);
402 break;
403 default:
404 return -EOPNOTSUPP;
405 }
406
407 return 0;
408 }
409
410 static int power_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
411 u32 attr, int channel, long val)
412 {
413 struct dfl_feature_platform_data *pdata = dev_get_platdata(dev->parent);
414 struct dfl_feature *feature = dev_get_drvdata(dev);
415 int ret = 0;
416 u64 v;
417
418 val = clamp_val(val / 1000000, 0, PWR_THRESHOLD_MAX);
419
420 mutex_lock(&pdata->lock);
421
422 switch (attr) {
423 case hwmon_power_max:
424 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
425 v &= ~PWR_THRESHOLD1;
426 v |= FIELD_PREP(PWR_THRESHOLD1, val);
427 writeq(v, feature->ioaddr + FME_PWR_THRESHOLD);
428 break;
429 case hwmon_power_crit:
430 v = readq(feature->ioaddr + FME_PWR_THRESHOLD);
431 v &= ~PWR_THRESHOLD2;
432 v |= FIELD_PREP(PWR_THRESHOLD2, val);
433 writeq(v, feature->ioaddr + FME_PWR_THRESHOLD);
434 break;
435 default:
436 ret = -EOPNOTSUPP;
437 break;
438 }
439
440 mutex_unlock(&pdata->lock);
441
442 return ret;
443 }
444
445 static umode_t power_hwmon_attrs_visible(const void *drvdata,
446 enum hwmon_sensor_types type,
447 u32 attr, int channel)
448 {
449 switch (attr) {
450 case hwmon_power_input:
451 case hwmon_power_max_alarm:
452 case hwmon_power_crit_alarm:
453 return 0444;
454 case hwmon_power_max:
455 case hwmon_power_crit:
456 return 0644;
457 }
458
459 return 0;
460 }
461
462 static const struct hwmon_ops power_hwmon_ops = {
463 .is_visible = power_hwmon_attrs_visible,
464 .read = power_hwmon_read,
465 .write = power_hwmon_write,
466 };
467
468 static const struct hwmon_channel_info *power_hwmon_info[] = {
469 HWMON_CHANNEL_INFO(power, HWMON_P_INPUT |
470 HWMON_P_MAX | HWMON_P_MAX_ALARM |
471 HWMON_P_CRIT | HWMON_P_CRIT_ALARM),
472 NULL
473 };
474
475 static const struct hwmon_chip_info power_hwmon_chip_info = {
476 .ops = &power_hwmon_ops,
477 .info = power_hwmon_info,
478 };
479
480 static ssize_t power1_xeon_limit_show(struct device *dev,
481 struct device_attribute *attr, char *buf)
482 {
483 struct dfl_feature *feature = dev_get_drvdata(dev);
484 u16 xeon_limit = 0;
485 u64 v;
486
487 v = readq(feature->ioaddr + FME_PWR_XEON_LIMIT);
488
489 if (FIELD_GET(XEON_PWR_EN, v))
490 xeon_limit = FIELD_GET(XEON_PWR_LIMIT, v);
491
492 return sprintf(buf, "%u\n", xeon_limit * 100000);
493 }
494
495 static ssize_t power1_fpga_limit_show(struct device *dev,
496 struct device_attribute *attr, char *buf)
497 {
498 struct dfl_feature *feature = dev_get_drvdata(dev);
499 u16 fpga_limit = 0;
500 u64 v;
501
502 v = readq(feature->ioaddr + FME_PWR_FPGA_LIMIT);
503
504 if (FIELD_GET(FPGA_PWR_EN, v))
505 fpga_limit = FIELD_GET(FPGA_PWR_LIMIT, v);
506
507 return sprintf(buf, "%u\n", fpga_limit * 100000);
508 }
509
510 static ssize_t power1_ltr_show(struct device *dev,
511 struct device_attribute *attr, char *buf)
512 {
513 struct dfl_feature *feature = dev_get_drvdata(dev);
514 u64 v;
515
516 v = readq(feature->ioaddr + FME_PWR_STATUS);
517
518 return sprintf(buf, "%u\n",
519 (unsigned int)FIELD_GET(FME_LATENCY_TOLERANCE, v));
520 }
521
522 static DEVICE_ATTR_RO(power1_xeon_limit);
523 static DEVICE_ATTR_RO(power1_fpga_limit);
524 static DEVICE_ATTR_RO(power1_ltr);
525
526 static struct attribute *power_extra_attrs[] = {
527 &dev_attr_power1_xeon_limit.attr,
528 &dev_attr_power1_fpga_limit.attr,
529 &dev_attr_power1_ltr.attr,
530 NULL
531 };
532
533 ATTRIBUTE_GROUPS(power_extra);
534
535 static int fme_power_mgmt_init(struct platform_device *pdev,
536 struct dfl_feature *feature)
537 {
538 struct device *hwmon;
539
540 hwmon = devm_hwmon_device_register_with_info(&pdev->dev,
541 "dfl_fme_power", feature,
542 &power_hwmon_chip_info,
543 power_extra_groups);
544 if (IS_ERR(hwmon)) {
545 dev_err(&pdev->dev, "Fail to register power hwmon\n");
546 return PTR_ERR(hwmon);
547 }
548
549 return 0;
550 }
551
552 static const struct dfl_feature_id fme_power_mgmt_id_table[] = {
553 {.id = FME_FEATURE_ID_POWER_MGMT,},
554 {0,}
555 };
556
557 static const struct dfl_feature_ops fme_power_mgmt_ops = {
558 .init = fme_power_mgmt_init,
559 };
560
561 static struct dfl_feature_driver fme_feature_drvs[] = {
562 {
563 .id_table = fme_hdr_id_table,
564 .ops = &fme_hdr_ops,
565 },
566 {
567 .id_table = fme_pr_mgmt_id_table,
568 .ops = &fme_pr_mgmt_ops,
569 },
570 {
571 .id_table = fme_global_err_id_table,
572 .ops = &fme_global_err_ops,
573 },
574 {
575 .id_table = fme_thermal_mgmt_id_table,
576 .ops = &fme_thermal_mgmt_ops,
577 },
578 {
579 .id_table = fme_power_mgmt_id_table,
580 .ops = &fme_power_mgmt_ops,
581 },
582 {
583 .id_table = fme_perf_id_table,
584 .ops = &fme_perf_ops,
585 },
586 {
587 .ops = NULL,
588 },
589 };
590
591 static long fme_ioctl_check_extension(struct dfl_feature_platform_data *pdata,
592 unsigned long arg)
593 {
594 /* No extension support for now */
595 return 0;
596 }
597
598 static int fme_open(struct inode *inode, struct file *filp)
599 {
600 struct platform_device *fdev = dfl_fpga_inode_to_feature_dev(inode);
601 struct dfl_feature_platform_data *pdata = dev_get_platdata(&fdev->dev);
602 int ret;
603
604 if (WARN_ON(!pdata))
605 return -ENODEV;
606
607 mutex_lock(&pdata->lock);
608 ret = dfl_feature_dev_use_begin(pdata, filp->f_flags & O_EXCL);
609 if (!ret) {
610 dev_dbg(&fdev->dev, "Device File Opened %d Times\n",
611 dfl_feature_dev_use_count(pdata));
612 filp->private_data = pdata;
613 }
614 mutex_unlock(&pdata->lock);
615
616 return ret;
617 }
618
619 static int fme_release(struct inode *inode, struct file *filp)
620 {
621 struct dfl_feature_platform_data *pdata = filp->private_data;
622 struct platform_device *pdev = pdata->dev;
623 struct dfl_feature *feature;
624
625 dev_dbg(&pdev->dev, "Device File Release\n");
626
627 mutex_lock(&pdata->lock);
628 dfl_feature_dev_use_end(pdata);
629
630 if (!dfl_feature_dev_use_count(pdata))
631 dfl_fpga_dev_for_each_feature(pdata, feature)
632 dfl_fpga_set_irq_triggers(feature, 0,
633 feature->nr_irqs, NULL);
634 mutex_unlock(&pdata->lock);
635
636 return 0;
637 }
638
639 static long fme_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
640 {
641 struct dfl_feature_platform_data *pdata = filp->private_data;
642 struct platform_device *pdev = pdata->dev;
643 struct dfl_feature *f;
644 long ret;
645
646 dev_dbg(&pdev->dev, "%s cmd 0x%x\n", __func__, cmd);
647
648 switch (cmd) {
649 case DFL_FPGA_GET_API_VERSION:
650 return DFL_FPGA_API_VERSION;
651 case DFL_FPGA_CHECK_EXTENSION:
652 return fme_ioctl_check_extension(pdata, arg);
653 default:
654 /*
655 * Let sub-feature's ioctl function to handle the cmd.
656 * Sub-feature's ioctl returns -ENODEV when cmd is not
657 * handled in this sub feature, and returns 0 or other
658 * error code if cmd is handled.
659 */
660 dfl_fpga_dev_for_each_feature(pdata, f) {
661 if (f->ops && f->ops->ioctl) {
662 ret = f->ops->ioctl(pdev, f, cmd, arg);
663 if (ret != -ENODEV)
664 return ret;
665 }
666 }
667 }
668
669 return -EINVAL;
670 }
671
672 static int fme_dev_init(struct platform_device *pdev)
673 {
674 struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
675 struct dfl_fme *fme;
676
677 fme = devm_kzalloc(&pdev->dev, sizeof(*fme), GFP_KERNEL);
678 if (!fme)
679 return -ENOMEM;
680
681 fme->pdata = pdata;
682
683 mutex_lock(&pdata->lock);
684 dfl_fpga_pdata_set_private(pdata, fme);
685 mutex_unlock(&pdata->lock);
686
687 return 0;
688 }
689
690 static void fme_dev_destroy(struct platform_device *pdev)
691 {
692 struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
693
694 mutex_lock(&pdata->lock);
695 dfl_fpga_pdata_set_private(pdata, NULL);
696 mutex_unlock(&pdata->lock);
697 }
698
699 static const struct file_operations fme_fops = {
700 .owner = THIS_MODULE,
701 .open = fme_open,
702 .release = fme_release,
703 .unlocked_ioctl = fme_ioctl,
704 };
705
706 static int fme_probe(struct platform_device *pdev)
707 {
708 int ret;
709
710 ret = fme_dev_init(pdev);
711 if (ret)
712 goto exit;
713
714 ret = dfl_fpga_dev_feature_init(pdev, fme_feature_drvs);
715 if (ret)
716 goto dev_destroy;
717
718 ret = dfl_fpga_dev_ops_register(pdev, &fme_fops, THIS_MODULE);
719 if (ret)
720 goto feature_uinit;
721
722 return 0;
723
724 feature_uinit:
725 dfl_fpga_dev_feature_uinit(pdev);
726 dev_destroy:
727 fme_dev_destroy(pdev);
728 exit:
729 return ret;
730 }
731
732 static int fme_remove(struct platform_device *pdev)
733 {
734 dfl_fpga_dev_ops_unregister(pdev);
735 dfl_fpga_dev_feature_uinit(pdev);
736 fme_dev_destroy(pdev);
737
738 return 0;
739 }
740
741 static const struct attribute_group *fme_dev_groups[] = {
742 &fme_hdr_group,
743 &fme_global_err_group,
744 NULL
745 };
746
747 static struct platform_driver fme_driver = {
748 .driver = {
749 .name = DFL_FPGA_FEATURE_DEV_FME,
750 .dev_groups = fme_dev_groups,
751 },
752 .probe = fme_probe,
753 .remove = fme_remove,
754 };
755
756 module_platform_driver(fme_driver);
757
758 MODULE_DESCRIPTION("FPGA Management Engine driver");
759 MODULE_AUTHOR("Intel Corporation");
760 MODULE_LICENSE("GPL v2");
761 MODULE_ALIAS("platform:dfl-fme");
Linux with added FPC-III support