1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Microsemi Switchtec(tm) PCIe Management Driver
4 * Copyright (c) 2017, Microsemi Corporation
5 */
6
7 #include <linux/switchtec.h>
8 #include <linux/switchtec_ioctl.h>
9
10 #include <linux/interrupt.h>
11 #include <linux/module.h>
12 #include <linux/fs.h>
13 #include <linux/uaccess.h>
14 #include <linux/poll.h>
15 #include <linux/wait.h>
16 #include <linux/io-64-nonatomic-lo-hi.h>
17 #include <linux/nospec.h>
18
19 MODULE_DESCRIPTION("Microsemi Switchtec(tm) PCIe Management Driver");
20 MODULE_VERSION("0.1");
21 MODULE_LICENSE("GPL");
22 MODULE_AUTHOR("Microsemi Corporation");
23
24 static int max_devices = 16;
25 module_param(max_devices, int, 0644);
26 MODULE_PARM_DESC(max_devices, "max number of switchtec device instances");
27
28 static bool use_dma_mrpc = true;
29 module_param(use_dma_mrpc, bool, 0644);
30 MODULE_PARM_DESC(use_dma_mrpc,
31 "Enable the use of the DMA MRPC feature");
32
33 static int nirqs = 32;
34 module_param(nirqs, int, 0644);
35 MODULE_PARM_DESC(nirqs, "number of interrupts to allocate (more may be useful for NTB applications)");
36
37 static dev_t switchtec_devt;
38 static DEFINE_IDA(switchtec_minor_ida);
39
40 struct class *switchtec_class;
41 EXPORT_SYMBOL_GPL(switchtec_class);
42
43 enum mrpc_state {
44 MRPC_IDLE = 0,
45 MRPC_QUEUED,
46 MRPC_RUNNING,
47 MRPC_DONE,
48 MRPC_IO_ERROR,
49 };
50
51 struct switchtec_user {
52 struct switchtec_dev *stdev;
53
54 enum mrpc_state state;
55
56 wait_queue_head_t cmd_comp;
57 struct kref kref;
58 struct list_head list;
59
60 bool cmd_done;
61 u32 cmd;
62 u32 status;
63 u32 return_code;
64 size_t data_len;
65 size_t read_len;
66 unsigned char data[SWITCHTEC_MRPC_PAYLOAD_SIZE];
67 int event_cnt;
68 };
69
70 /*
71 * The MMIO reads to the device_id register should always return the device ID
72 * of the device, otherwise the firmware is probably stuck or unreachable
73 * due to a firmware reset which clears PCI state including the BARs and Memory
74 * Space Enable bits.
75 */
is_firmware_running(struct switchtec_dev * stdev)76 static int is_firmware_running(struct switchtec_dev *stdev)
77 {
78 u32 device = ioread32(&stdev->mmio_sys_info->device_id);
79
80 return stdev->pdev->device == device;
81 }
82
stuser_create(struct switchtec_dev * stdev)83 static struct switchtec_user *stuser_create(struct switchtec_dev *stdev)
84 {
85 struct switchtec_user *stuser;
86
87 stuser = kzalloc(sizeof(*stuser), GFP_KERNEL);
88 if (!stuser)
89 return ERR_PTR(-ENOMEM);
90
91 get_device(&stdev->dev);
92 stuser->stdev = stdev;
93 kref_init(&stuser->kref);
94 INIT_LIST_HEAD(&stuser->list);
95 init_waitqueue_head(&stuser->cmd_comp);
96 stuser->event_cnt = atomic_read(&stdev->event_cnt);
97
98 dev_dbg(&stdev->dev, "%s: %p\n", __func__, stuser);
99
100 return stuser;
101 }
102
stuser_free(struct kref * kref)103 static void stuser_free(struct kref *kref)
104 {
105 struct switchtec_user *stuser;
106
107 stuser = container_of(kref, struct switchtec_user, kref);
108
109 dev_dbg(&stuser->stdev->dev, "%s: %p\n", __func__, stuser);
110
111 put_device(&stuser->stdev->dev);
112 kfree(stuser);
113 }
114
stuser_put(struct switchtec_user * stuser)115 static void stuser_put(struct switchtec_user *stuser)
116 {
117 kref_put(&stuser->kref, stuser_free);
118 }
119
stuser_set_state(struct switchtec_user * stuser,enum mrpc_state state)120 static void stuser_set_state(struct switchtec_user *stuser,
121 enum mrpc_state state)
122 {
123 /* requires the mrpc_mutex to already be held when called */
124
125 static const char * const state_names[] = {
126 [MRPC_IDLE] = "IDLE",
127 [MRPC_QUEUED] = "QUEUED",
128 [MRPC_RUNNING] = "RUNNING",
129 [MRPC_DONE] = "DONE",
130 [MRPC_IO_ERROR] = "IO_ERROR",
131 };
132
133 stuser->state = state;
134
135 dev_dbg(&stuser->stdev->dev, "stuser state %p -> %s",
136 stuser, state_names[state]);
137 }
138
139 static void mrpc_complete_cmd(struct switchtec_dev *stdev);
140
flush_wc_buf(struct switchtec_dev * stdev)141 static void flush_wc_buf(struct switchtec_dev *stdev)
142 {
143 struct ntb_dbmsg_regs __iomem *mmio_dbmsg;
144
145 /*
146 * odb (outbound doorbell) register is processed by low latency
147 * hardware and w/o side effect
148 */
149 mmio_dbmsg = (void __iomem *)stdev->mmio_ntb +
150 SWITCHTEC_NTB_REG_DBMSG_OFFSET;
151 ioread32(&mmio_dbmsg->odb);
152 }
153
mrpc_cmd_submit(struct switchtec_dev * stdev)154 static void mrpc_cmd_submit(struct switchtec_dev *stdev)
155 {
156 /* requires the mrpc_mutex to already be held when called */
157
158 struct switchtec_user *stuser;
159
160 if (stdev->mrpc_busy)
161 return;
162
163 if (list_empty(&stdev->mrpc_queue))
164 return;
165
166 stuser = list_entry(stdev->mrpc_queue.next, struct switchtec_user,
167 list);
168
169 if (stdev->dma_mrpc) {
170 stdev->dma_mrpc->status = SWITCHTEC_MRPC_STATUS_INPROGRESS;
171 memset(stdev->dma_mrpc->data, 0xFF, SWITCHTEC_MRPC_PAYLOAD_SIZE);
172 }
173
174 stuser_set_state(stuser, MRPC_RUNNING);
175 stdev->mrpc_busy = 1;
176 memcpy_toio(&stdev->mmio_mrpc->input_data,
177 stuser->data, stuser->data_len);
178 flush_wc_buf(stdev);
179 iowrite32(stuser->cmd, &stdev->mmio_mrpc->cmd);
180
181 schedule_delayed_work(&stdev->mrpc_timeout,
182 msecs_to_jiffies(500));
183 }
184
mrpc_queue_cmd(struct switchtec_user * stuser)185 static int mrpc_queue_cmd(struct switchtec_user *stuser)
186 {
187 /* requires the mrpc_mutex to already be held when called */
188
189 struct switchtec_dev *stdev = stuser->stdev;
190
191 kref_get(&stuser->kref);
192 stuser->read_len = sizeof(stuser->data);
193 stuser_set_state(stuser, MRPC_QUEUED);
194 stuser->cmd_done = false;
195 list_add_tail(&stuser->list, &stdev->mrpc_queue);
196
197 mrpc_cmd_submit(stdev);
198
199 return 0;
200 }
201
mrpc_cleanup_cmd(struct switchtec_dev * stdev)202 static void mrpc_cleanup_cmd(struct switchtec_dev *stdev)
203 {
204 /* requires the mrpc_mutex to already be held when called */
205
206 struct switchtec_user *stuser = list_entry(stdev->mrpc_queue.next,
207 struct switchtec_user, list);
208
209 stuser->cmd_done = true;
210 wake_up_interruptible(&stuser->cmd_comp);
211 list_del_init(&stuser->list);
212 stuser_put(stuser);
213 stdev->mrpc_busy = 0;
214
215 mrpc_cmd_submit(stdev);
216 }
217
mrpc_complete_cmd(struct switchtec_dev * stdev)218 static void mrpc_complete_cmd(struct switchtec_dev *stdev)
219 {
220 /* requires the mrpc_mutex to already be held when called */
221
222 struct switchtec_user *stuser;
223
224 if (list_empty(&stdev->mrpc_queue))
225 return;
226
227 stuser = list_entry(stdev->mrpc_queue.next, struct switchtec_user,
228 list);
229
230 if (stdev->dma_mrpc)
231 stuser->status = stdev->dma_mrpc->status;
232 else
233 stuser->status = ioread32(&stdev->mmio_mrpc->status);
234
235 if (stuser->status == SWITCHTEC_MRPC_STATUS_INPROGRESS)
236 return;
237
238 stuser_set_state(stuser, MRPC_DONE);
239 stuser->return_code = 0;
240
241 if (stuser->status != SWITCHTEC_MRPC_STATUS_DONE &&
242 stuser->status != SWITCHTEC_MRPC_STATUS_ERROR)
243 goto out;
244
245 if (stdev->dma_mrpc)
246 stuser->return_code = stdev->dma_mrpc->rtn_code;
247 else
248 stuser->return_code = ioread32(&stdev->mmio_mrpc->ret_value);
249 if (stuser->return_code != 0)
250 goto out;
251
252 if (stdev->dma_mrpc)
253 memcpy(stuser->data, &stdev->dma_mrpc->data,
254 stuser->read_len);
255 else
256 memcpy_fromio(stuser->data, &stdev->mmio_mrpc->output_data,
257 stuser->read_len);
258 out:
259 mrpc_cleanup_cmd(stdev);
260 }
261
mrpc_event_work(struct work_struct * work)262 static void mrpc_event_work(struct work_struct *work)
263 {
264 struct switchtec_dev *stdev;
265
266 stdev = container_of(work, struct switchtec_dev, mrpc_work);
267
268 dev_dbg(&stdev->dev, "%s\n", __func__);
269
270 mutex_lock(&stdev->mrpc_mutex);
271 cancel_delayed_work(&stdev->mrpc_timeout);
272 mrpc_complete_cmd(stdev);
273 mutex_unlock(&stdev->mrpc_mutex);
274 }
275
mrpc_error_complete_cmd(struct switchtec_dev * stdev)276 static void mrpc_error_complete_cmd(struct switchtec_dev *stdev)
277 {
278 /* requires the mrpc_mutex to already be held when called */
279
280 struct switchtec_user *stuser;
281
282 if (list_empty(&stdev->mrpc_queue))
283 return;
284
285 stuser = list_entry(stdev->mrpc_queue.next,
286 struct switchtec_user, list);
287
288 stuser_set_state(stuser, MRPC_IO_ERROR);
289
290 mrpc_cleanup_cmd(stdev);
291 }
292
mrpc_timeout_work(struct work_struct * work)293 static void mrpc_timeout_work(struct work_struct *work)
294 {
295 struct switchtec_dev *stdev;
296 u32 status;
297
298 stdev = container_of(work, struct switchtec_dev, mrpc_timeout.work);
299
300 dev_dbg(&stdev->dev, "%s\n", __func__);
301
302 mutex_lock(&stdev->mrpc_mutex);
303
304 if (!is_firmware_running(stdev)) {
305 mrpc_error_complete_cmd(stdev);
306 goto out;
307 }
308
309 if (stdev->dma_mrpc)
310 status = stdev->dma_mrpc->status;
311 else
312 status = ioread32(&stdev->mmio_mrpc->status);
313 if (status == SWITCHTEC_MRPC_STATUS_INPROGRESS) {
314 schedule_delayed_work(&stdev->mrpc_timeout,
315 msecs_to_jiffies(500));
316 goto out;
317 }
318
319 mrpc_complete_cmd(stdev);
320 out:
321 mutex_unlock(&stdev->mrpc_mutex);
322 }
323
device_version_show(struct device * dev,struct device_attribute * attr,char * buf)324 static ssize_t device_version_show(struct device *dev,
325 struct device_attribute *attr, char *buf)
326 {
327 struct switchtec_dev *stdev = to_stdev(dev);
328 u32 ver;
329
330 ver = ioread32(&stdev->mmio_sys_info->device_version);
331
332 return sysfs_emit(buf, "%x\n", ver);
333 }
334 static DEVICE_ATTR_RO(device_version);
335
fw_version_show(struct device * dev,struct device_attribute * attr,char * buf)336 static ssize_t fw_version_show(struct device *dev,
337 struct device_attribute *attr, char *buf)
338 {
339 struct switchtec_dev *stdev = to_stdev(dev);
340 u32 ver;
341
342 ver = ioread32(&stdev->mmio_sys_info->firmware_version);
343
344 return sysfs_emit(buf, "%08x\n", ver);
345 }
346 static DEVICE_ATTR_RO(fw_version);
347
io_string_show(char * buf,void __iomem * attr,size_t len)348 static ssize_t io_string_show(char *buf, void __iomem *attr, size_t len)
349 {
350 int i;
351
352 memcpy_fromio(buf, attr, len);
353 buf[len] = '\n';
354 buf[len + 1] = 0;
355
356 for (i = len - 1; i > 0; i--) {
357 if (buf[i] != ' ')
358 break;
359 buf[i] = '\n';
360 buf[i + 1] = 0;
361 }
362
363 return strlen(buf);
364 }
365
366 #define DEVICE_ATTR_SYS_INFO_STR(field) \
367 static ssize_t field ## _show(struct device *dev, \
368 struct device_attribute *attr, char *buf) \
369 { \
370 struct switchtec_dev *stdev = to_stdev(dev); \
371 struct sys_info_regs __iomem *si = stdev->mmio_sys_info; \
372 if (stdev->gen == SWITCHTEC_GEN3) \
373 return io_string_show(buf, &si->gen3.field, \
374 sizeof(si->gen3.field)); \
375 else if (stdev->gen == SWITCHTEC_GEN4) \
376 return io_string_show(buf, &si->gen4.field, \
377 sizeof(si->gen4.field)); \
378 else \
379 return -EOPNOTSUPP; \
380 } \
381 \
382 static DEVICE_ATTR_RO(field)
383
384 DEVICE_ATTR_SYS_INFO_STR(vendor_id);
385 DEVICE_ATTR_SYS_INFO_STR(product_id);
386 DEVICE_ATTR_SYS_INFO_STR(product_revision);
387
component_vendor_show(struct device * dev,struct device_attribute * attr,char * buf)388 static ssize_t component_vendor_show(struct device *dev,
389 struct device_attribute *attr, char *buf)
390 {
391 struct switchtec_dev *stdev = to_stdev(dev);
392 struct sys_info_regs __iomem *si = stdev->mmio_sys_info;
393
394 /* component_vendor field not supported after gen3 */
395 if (stdev->gen != SWITCHTEC_GEN3)
396 return sysfs_emit(buf, "none\n");
397
398 return io_string_show(buf, &si->gen3.component_vendor,
399 sizeof(si->gen3.component_vendor));
400 }
401 static DEVICE_ATTR_RO(component_vendor);
402
component_id_show(struct device * dev,struct device_attribute * attr,char * buf)403 static ssize_t component_id_show(struct device *dev,
404 struct device_attribute *attr, char *buf)
405 {
406 struct switchtec_dev *stdev = to_stdev(dev);
407 int id = ioread16(&stdev->mmio_sys_info->gen3.component_id);
408
409 /* component_id field not supported after gen3 */
410 if (stdev->gen != SWITCHTEC_GEN3)
411 return sysfs_emit(buf, "none\n");
412
413 return sysfs_emit(buf, "PM%04X\n", id);
414 }
415 static DEVICE_ATTR_RO(component_id);
416
component_revision_show(struct device * dev,struct device_attribute * attr,char * buf)417 static ssize_t component_revision_show(struct device *dev,
418 struct device_attribute *attr, char *buf)
419 {
420 struct switchtec_dev *stdev = to_stdev(dev);
421 int rev = ioread8(&stdev->mmio_sys_info->gen3.component_revision);
422
423 /* component_revision field not supported after gen3 */
424 if (stdev->gen != SWITCHTEC_GEN3)
425 return sysfs_emit(buf, "255\n");
426
427 return sysfs_emit(buf, "%d\n", rev);
428 }
429 static DEVICE_ATTR_RO(component_revision);
430
partition_show(struct device * dev,struct device_attribute * attr,char * buf)431 static ssize_t partition_show(struct device *dev,
432 struct device_attribute *attr, char *buf)
433 {
434 struct switchtec_dev *stdev = to_stdev(dev);
435
436 return sysfs_emit(buf, "%d\n", stdev->partition);
437 }
438 static DEVICE_ATTR_RO(partition);
439
partition_count_show(struct device * dev,struct device_attribute * attr,char * buf)440 static ssize_t partition_count_show(struct device *dev,
441 struct device_attribute *attr, char *buf)
442 {
443 struct switchtec_dev *stdev = to_stdev(dev);
444
445 return sysfs_emit(buf, "%d\n", stdev->partition_count);
446 }
447 static DEVICE_ATTR_RO(partition_count);
448
449 static struct attribute *switchtec_device_attrs[] = {
450 &dev_attr_device_version.attr,
451 &dev_attr_fw_version.attr,
452 &dev_attr_vendor_id.attr,
453 &dev_attr_product_id.attr,
454 &dev_attr_product_revision.attr,
455 &dev_attr_component_vendor.attr,
456 &dev_attr_component_id.attr,
457 &dev_attr_component_revision.attr,
458 &dev_attr_partition.attr,
459 &dev_attr_partition_count.attr,
460 NULL,
461 };
462
463 ATTRIBUTE_GROUPS(switchtec_device);
464
switchtec_dev_open(struct inode * inode,struct file * filp)465 static int switchtec_dev_open(struct inode *inode, struct file *filp)
466 {
467 struct switchtec_dev *stdev;
468 struct switchtec_user *stuser;
469
470 stdev = container_of(inode->i_cdev, struct switchtec_dev, cdev);
471
472 stuser = stuser_create(stdev);
473 if (IS_ERR(stuser))
474 return PTR_ERR(stuser);
475
476 filp->private_data = stuser;
477 stream_open(inode, filp);
478
479 dev_dbg(&stdev->dev, "%s: %p\n", __func__, stuser);
480
481 return 0;
482 }
483
switchtec_dev_release(struct inode * inode,struct file * filp)484 static int switchtec_dev_release(struct inode *inode, struct file *filp)
485 {
486 struct switchtec_user *stuser = filp->private_data;
487
488 stuser_put(stuser);
489
490 return 0;
491 }
492
lock_mutex_and_test_alive(struct switchtec_dev * stdev)493 static int lock_mutex_and_test_alive(struct switchtec_dev *stdev)
494 {
495 if (mutex_lock_interruptible(&stdev->mrpc_mutex))
496 return -EINTR;
497
498 if (!stdev->alive) {
499 mutex_unlock(&stdev->mrpc_mutex);
500 return -ENODEV;
501 }
502
503 return 0;
504 }
505
switchtec_dev_write(struct file * filp,const char __user * data,size_t size,loff_t * off)506 static ssize_t switchtec_dev_write(struct file *filp, const char __user *data,
507 size_t size, loff_t *off)
508 {
509 struct switchtec_user *stuser = filp->private_data;
510 struct switchtec_dev *stdev = stuser->stdev;
511 int rc;
512
513 if (size < sizeof(stuser->cmd) ||
514 size > sizeof(stuser->cmd) + sizeof(stuser->data))
515 return -EINVAL;
516
517 stuser->data_len = size - sizeof(stuser->cmd);
518
519 rc = lock_mutex_and_test_alive(stdev);
520 if (rc)
521 return rc;
522
523 if (stuser->state != MRPC_IDLE) {
524 rc = -EBADE;
525 goto out;
526 }
527
528 rc = copy_from_user(&stuser->cmd, data, sizeof(stuser->cmd));
529 if (rc) {
530 rc = -EFAULT;
531 goto out;
532 }
533 if (((MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_WRITE) ||
534 (MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_READ)) &&
535 !capable(CAP_SYS_ADMIN)) {
536 rc = -EPERM;
537 goto out;
538 }
539
540 data += sizeof(stuser->cmd);
541 rc = copy_from_user(&stuser->data, data, size - sizeof(stuser->cmd));
542 if (rc) {
543 rc = -EFAULT;
544 goto out;
545 }
546
547 rc = mrpc_queue_cmd(stuser);
548
549 out:
550 mutex_unlock(&stdev->mrpc_mutex);
551
552 if (rc)
553 return rc;
554
555 return size;
556 }
557
switchtec_dev_read(struct file * filp,char __user * data,size_t size,loff_t * off)558 static ssize_t switchtec_dev_read(struct file *filp, char __user *data,
559 size_t size, loff_t *off)
560 {
561 struct switchtec_user *stuser = filp->private_data;
562 struct switchtec_dev *stdev = stuser->stdev;
563 int rc;
564
565 if (size < sizeof(stuser->cmd) ||
566 size > sizeof(stuser->cmd) + sizeof(stuser->data))
567 return -EINVAL;
568
569 rc = lock_mutex_and_test_alive(stdev);
570 if (rc)
571 return rc;
572
573 if (stuser->state == MRPC_IDLE) {
574 mutex_unlock(&stdev->mrpc_mutex);
575 return -EBADE;
576 }
577
578 stuser->read_len = size - sizeof(stuser->return_code);
579
580 mutex_unlock(&stdev->mrpc_mutex);
581
582 if (filp->f_flags & O_NONBLOCK) {
583 if (!stuser->cmd_done)
584 return -EAGAIN;
585 } else {
586 rc = wait_event_interruptible(stuser->cmd_comp,
587 stuser->cmd_done);
588 if (rc < 0)
589 return rc;
590 }
591
592 rc = lock_mutex_and_test_alive(stdev);
593 if (rc)
594 return rc;
595
596 if (stuser->state == MRPC_IO_ERROR) {
597 mutex_unlock(&stdev->mrpc_mutex);
598 return -EIO;
599 }
600
601 if (stuser->state != MRPC_DONE) {
602 mutex_unlock(&stdev->mrpc_mutex);
603 return -EBADE;
604 }
605
606 rc = copy_to_user(data, &stuser->return_code,
607 sizeof(stuser->return_code));
608 if (rc) {
609 rc = -EFAULT;
610 goto out;
611 }
612
613 data += sizeof(stuser->return_code);
614 rc = copy_to_user(data, &stuser->data,
615 size - sizeof(stuser->return_code));
616 if (rc) {
617 rc = -EFAULT;
618 goto out;
619 }
620
621 stuser_set_state(stuser, MRPC_IDLE);
622
623 out:
624 mutex_unlock(&stdev->mrpc_mutex);
625
626 if (stuser->status == SWITCHTEC_MRPC_STATUS_DONE ||
627 stuser->status == SWITCHTEC_MRPC_STATUS_ERROR)
628 return size;
629 else if (stuser->status == SWITCHTEC_MRPC_STATUS_INTERRUPTED)
630 return -ENXIO;
631 else
632 return -EBADMSG;
633 }
634
switchtec_dev_poll(struct file * filp,poll_table * wait)635 static __poll_t switchtec_dev_poll(struct file *filp, poll_table *wait)
636 {
637 struct switchtec_user *stuser = filp->private_data;
638 struct switchtec_dev *stdev = stuser->stdev;
639 __poll_t ret = 0;
640
641 poll_wait(filp, &stuser->cmd_comp, wait);
642 poll_wait(filp, &stdev->event_wq, wait);
643
644 if (lock_mutex_and_test_alive(stdev))
645 return EPOLLIN | EPOLLRDHUP | EPOLLOUT | EPOLLERR | EPOLLHUP;
646
647 mutex_unlock(&stdev->mrpc_mutex);
648
649 if (stuser->cmd_done)
650 ret |= EPOLLIN | EPOLLRDNORM;
651
652 if (stuser->event_cnt != atomic_read(&stdev->event_cnt))
653 ret |= EPOLLPRI | EPOLLRDBAND;
654
655 return ret;
656 }
657
ioctl_flash_info(struct switchtec_dev * stdev,struct switchtec_ioctl_flash_info __user * uinfo)658 static int ioctl_flash_info(struct switchtec_dev *stdev,
659 struct switchtec_ioctl_flash_info __user *uinfo)
660 {
661 struct switchtec_ioctl_flash_info info = {0};
662 struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
663
664 if (stdev->gen == SWITCHTEC_GEN3) {
665 info.flash_length = ioread32(&fi->gen3.flash_length);
666 info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN3;
667 } else if (stdev->gen == SWITCHTEC_GEN4) {
668 info.flash_length = ioread32(&fi->gen4.flash_length);
669 info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN4;
670 } else {
671 return -EOPNOTSUPP;
672 }
673
674 if (copy_to_user(uinfo, &info, sizeof(info)))
675 return -EFAULT;
676
677 return 0;
678 }
679
set_fw_info_part(struct switchtec_ioctl_flash_part_info * info,struct partition_info __iomem * pi)680 static void set_fw_info_part(struct switchtec_ioctl_flash_part_info *info,
681 struct partition_info __iomem *pi)
682 {
683 info->address = ioread32(&pi->address);
684 info->length = ioread32(&pi->length);
685 }
686
flash_part_info_gen3(struct switchtec_dev * stdev,struct switchtec_ioctl_flash_part_info * info)687 static int flash_part_info_gen3(struct switchtec_dev *stdev,
688 struct switchtec_ioctl_flash_part_info *info)
689 {
690 struct flash_info_regs_gen3 __iomem *fi =
691 &stdev->mmio_flash_info->gen3;
692 struct sys_info_regs_gen3 __iomem *si = &stdev->mmio_sys_info->gen3;
693 u32 active_addr = -1;
694
695 switch (info->flash_partition) {
696 case SWITCHTEC_IOCTL_PART_CFG0:
697 active_addr = ioread32(&fi->active_cfg);
698 set_fw_info_part(info, &fi->cfg0);
699 if (ioread16(&si->cfg_running) == SWITCHTEC_GEN3_CFG0_RUNNING)
700 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
701 break;
702 case SWITCHTEC_IOCTL_PART_CFG1:
703 active_addr = ioread32(&fi->active_cfg);
704 set_fw_info_part(info, &fi->cfg1);
705 if (ioread16(&si->cfg_running) == SWITCHTEC_GEN3_CFG1_RUNNING)
706 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
707 break;
708 case SWITCHTEC_IOCTL_PART_IMG0:
709 active_addr = ioread32(&fi->active_img);
710 set_fw_info_part(info, &fi->img0);
711 if (ioread16(&si->img_running) == SWITCHTEC_GEN3_IMG0_RUNNING)
712 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
713 break;
714 case SWITCHTEC_IOCTL_PART_IMG1:
715 active_addr = ioread32(&fi->active_img);
716 set_fw_info_part(info, &fi->img1);
717 if (ioread16(&si->img_running) == SWITCHTEC_GEN3_IMG1_RUNNING)
718 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
719 break;
720 case SWITCHTEC_IOCTL_PART_NVLOG:
721 set_fw_info_part(info, &fi->nvlog);
722 break;
723 case SWITCHTEC_IOCTL_PART_VENDOR0:
724 set_fw_info_part(info, &fi->vendor[0]);
725 break;
726 case SWITCHTEC_IOCTL_PART_VENDOR1:
727 set_fw_info_part(info, &fi->vendor[1]);
728 break;
729 case SWITCHTEC_IOCTL_PART_VENDOR2:
730 set_fw_info_part(info, &fi->vendor[2]);
731 break;
732 case SWITCHTEC_IOCTL_PART_VENDOR3:
733 set_fw_info_part(info, &fi->vendor[3]);
734 break;
735 case SWITCHTEC_IOCTL_PART_VENDOR4:
736 set_fw_info_part(info, &fi->vendor[4]);
737 break;
738 case SWITCHTEC_IOCTL_PART_VENDOR5:
739 set_fw_info_part(info, &fi->vendor[5]);
740 break;
741 case SWITCHTEC_IOCTL_PART_VENDOR6:
742 set_fw_info_part(info, &fi->vendor[6]);
743 break;
744 case SWITCHTEC_IOCTL_PART_VENDOR7:
745 set_fw_info_part(info, &fi->vendor[7]);
746 break;
747 default:
748 return -EINVAL;
749 }
750
751 if (info->address == active_addr)
752 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
753
754 return 0;
755 }
756
flash_part_info_gen4(struct switchtec_dev * stdev,struct switchtec_ioctl_flash_part_info * info)757 static int flash_part_info_gen4(struct switchtec_dev *stdev,
758 struct switchtec_ioctl_flash_part_info *info)
759 {
760 struct flash_info_regs_gen4 __iomem *fi = &stdev->mmio_flash_info->gen4;
761 struct sys_info_regs_gen4 __iomem *si = &stdev->mmio_sys_info->gen4;
762 struct active_partition_info_gen4 __iomem *af = &fi->active_flag;
763
764 switch (info->flash_partition) {
765 case SWITCHTEC_IOCTL_PART_MAP_0:
766 set_fw_info_part(info, &fi->map0);
767 break;
768 case SWITCHTEC_IOCTL_PART_MAP_1:
769 set_fw_info_part(info, &fi->map1);
770 break;
771 case SWITCHTEC_IOCTL_PART_KEY_0:
772 set_fw_info_part(info, &fi->key0);
773 if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY0_ACTIVE)
774 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
775 if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY0_RUNNING)
776 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
777 break;
778 case SWITCHTEC_IOCTL_PART_KEY_1:
779 set_fw_info_part(info, &fi->key1);
780 if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY1_ACTIVE)
781 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
782 if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY1_RUNNING)
783 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
784 break;
785 case SWITCHTEC_IOCTL_PART_BL2_0:
786 set_fw_info_part(info, &fi->bl2_0);
787 if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_0_ACTIVE)
788 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
789 if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_0_RUNNING)
790 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
791 break;
792 case SWITCHTEC_IOCTL_PART_BL2_1:
793 set_fw_info_part(info, &fi->bl2_1);
794 if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_1_ACTIVE)
795 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
796 if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_1_RUNNING)
797 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
798 break;
799 case SWITCHTEC_IOCTL_PART_CFG0:
800 set_fw_info_part(info, &fi->cfg0);
801 if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG0_ACTIVE)
802 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
803 if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG0_RUNNING)
804 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
805 break;
806 case SWITCHTEC_IOCTL_PART_CFG1:
807 set_fw_info_part(info, &fi->cfg1);
808 if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG1_ACTIVE)
809 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
810 if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG1_RUNNING)
811 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
812 break;
813 case SWITCHTEC_IOCTL_PART_IMG0:
814 set_fw_info_part(info, &fi->img0);
815 if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG0_ACTIVE)
816 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
817 if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG0_RUNNING)
818 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
819 break;
820 case SWITCHTEC_IOCTL_PART_IMG1:
821 set_fw_info_part(info, &fi->img1);
822 if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG1_ACTIVE)
823 info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
824 if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG1_RUNNING)
825 info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
826 break;
827 case SWITCHTEC_IOCTL_PART_NVLOG:
828 set_fw_info_part(info, &fi->nvlog);
829 break;
830 case SWITCHTEC_IOCTL_PART_VENDOR0:
831 set_fw_info_part(info, &fi->vendor[0]);
832 break;
833 case SWITCHTEC_IOCTL_PART_VENDOR1:
834 set_fw_info_part(info, &fi->vendor[1]);
835 break;
836 case SWITCHTEC_IOCTL_PART_VENDOR2:
837 set_fw_info_part(info, &fi->vendor[2]);
838 break;
839 case SWITCHTEC_IOCTL_PART_VENDOR3:
840 set_fw_info_part(info, &fi->vendor[3]);
841 break;
842 case SWITCHTEC_IOCTL_PART_VENDOR4:
843 set_fw_info_part(info, &fi->vendor[4]);
844 break;
845 case SWITCHTEC_IOCTL_PART_VENDOR5:
846 set_fw_info_part(info, &fi->vendor[5]);
847 break;
848 case SWITCHTEC_IOCTL_PART_VENDOR6:
849 set_fw_info_part(info, &fi->vendor[6]);
850 break;
851 case SWITCHTEC_IOCTL_PART_VENDOR7:
852 set_fw_info_part(info, &fi->vendor[7]);
853 break;
854 default:
855 return -EINVAL;
856 }
857
858 return 0;
859 }
860
ioctl_flash_part_info(struct switchtec_dev * stdev,struct switchtec_ioctl_flash_part_info __user * uinfo)861 static int ioctl_flash_part_info(struct switchtec_dev *stdev,
862 struct switchtec_ioctl_flash_part_info __user *uinfo)
863 {
864 int ret;
865 struct switchtec_ioctl_flash_part_info info = {0};
866
867 if (copy_from_user(&info, uinfo, sizeof(info)))
868 return -EFAULT;
869
870 if (stdev->gen == SWITCHTEC_GEN3) {
871 ret = flash_part_info_gen3(stdev, &info);
872 if (ret)
873 return ret;
874 } else if (stdev->gen == SWITCHTEC_GEN4) {
875 ret = flash_part_info_gen4(stdev, &info);
876 if (ret)
877 return ret;
878 } else {
879 return -EOPNOTSUPP;
880 }
881
882 if (copy_to_user(uinfo, &info, sizeof(info)))
883 return -EFAULT;
884
885 return 0;
886 }
887
ioctl_event_summary(struct switchtec_dev * stdev,struct switchtec_user * stuser,struct switchtec_ioctl_event_summary __user * usum,size_t size)888 static int ioctl_event_summary(struct switchtec_dev *stdev,
889 struct switchtec_user *stuser,
890 struct switchtec_ioctl_event_summary __user *usum,
891 size_t size)
892 {
893 struct switchtec_ioctl_event_summary *s;
894 int i;
895 u32 reg;
896 int ret = 0;
897
898 s = kzalloc(sizeof(*s), GFP_KERNEL);
899 if (!s)
900 return -ENOMEM;
901
902 s->global = ioread32(&stdev->mmio_sw_event->global_summary);
903 s->part_bitmap = ioread64(&stdev->mmio_sw_event->part_event_bitmap);
904 s->local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
905
906 for (i = 0; i < stdev->partition_count; i++) {
907 reg = ioread32(&stdev->mmio_part_cfg_all[i].part_event_summary);
908 s->part[i] = reg;
909 }
910
911 for (i = 0; i < stdev->pff_csr_count; i++) {
912 reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
913 s->pff[i] = reg;
914 }
915
916 if (copy_to_user(usum, s, size)) {
917 ret = -EFAULT;
918 goto error_case;
919 }
920
921 stuser->event_cnt = atomic_read(&stdev->event_cnt);
922
923 error_case:
924 kfree(s);
925 return ret;
926 }
927
global_ev_reg(struct switchtec_dev * stdev,size_t offset,int index)928 static u32 __iomem *global_ev_reg(struct switchtec_dev *stdev,
929 size_t offset, int index)
930 {
931 return (void __iomem *)stdev->mmio_sw_event + offset;
932 }
933
part_ev_reg(struct switchtec_dev * stdev,size_t offset,int index)934 static u32 __iomem *part_ev_reg(struct switchtec_dev *stdev,
935 size_t offset, int index)
936 {
937 return (void __iomem *)&stdev->mmio_part_cfg_all[index] + offset;
938 }
939
pff_ev_reg(struct switchtec_dev * stdev,size_t offset,int index)940 static u32 __iomem *pff_ev_reg(struct switchtec_dev *stdev,
941 size_t offset, int index)
942 {
943 return (void __iomem *)&stdev->mmio_pff_csr[index] + offset;
944 }
945
946 #define EV_GLB(i, r)[i] = {offsetof(struct sw_event_regs, r), global_ev_reg}
947 #define EV_PAR(i, r)[i] = {offsetof(struct part_cfg_regs, r), part_ev_reg}
948 #define EV_PFF(i, r)[i] = {offsetof(struct pff_csr_regs, r), pff_ev_reg}
949
950 static const struct event_reg {
951 size_t offset;
952 u32 __iomem *(*map_reg)(struct switchtec_dev *stdev,
953 size_t offset, int index);
954 } event_regs[] = {
955 EV_GLB(SWITCHTEC_IOCTL_EVENT_STACK_ERROR, stack_error_event_hdr),
956 EV_GLB(SWITCHTEC_IOCTL_EVENT_PPU_ERROR, ppu_error_event_hdr),
957 EV_GLB(SWITCHTEC_IOCTL_EVENT_ISP_ERROR, isp_error_event_hdr),
958 EV_GLB(SWITCHTEC_IOCTL_EVENT_SYS_RESET, sys_reset_event_hdr),
959 EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_EXC, fw_exception_hdr),
960 EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NMI, fw_nmi_hdr),
961 EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NON_FATAL, fw_non_fatal_hdr),
962 EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_FATAL, fw_fatal_hdr),
963 EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP, twi_mrpc_comp_hdr),
964 EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP_ASYNC,
965 twi_mrpc_comp_async_hdr),
966 EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP, cli_mrpc_comp_hdr),
967 EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP_ASYNC,
968 cli_mrpc_comp_async_hdr),
969 EV_GLB(SWITCHTEC_IOCTL_EVENT_GPIO_INT, gpio_interrupt_hdr),
970 EV_GLB(SWITCHTEC_IOCTL_EVENT_GFMS, gfms_event_hdr),
971 EV_PAR(SWITCHTEC_IOCTL_EVENT_PART_RESET, part_reset_hdr),
972 EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP, mrpc_comp_hdr),
973 EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP_ASYNC, mrpc_comp_async_hdr),
974 EV_PAR(SWITCHTEC_IOCTL_EVENT_DYN_PART_BIND_COMP, dyn_binding_hdr),
975 EV_PAR(SWITCHTEC_IOCTL_EVENT_INTERCOMM_REQ_NOTIFY,
976 intercomm_notify_hdr),
977 EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_P2P, aer_in_p2p_hdr),
978 EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_VEP, aer_in_vep_hdr),
979 EV_PFF(SWITCHTEC_IOCTL_EVENT_DPC, dpc_hdr),
980 EV_PFF(SWITCHTEC_IOCTL_EVENT_CTS, cts_hdr),
981 EV_PFF(SWITCHTEC_IOCTL_EVENT_UEC, uec_hdr),
982 EV_PFF(SWITCHTEC_IOCTL_EVENT_HOTPLUG, hotplug_hdr),
983 EV_PFF(SWITCHTEC_IOCTL_EVENT_IER, ier_hdr),
984 EV_PFF(SWITCHTEC_IOCTL_EVENT_THRESH, threshold_hdr),
985 EV_PFF(SWITCHTEC_IOCTL_EVENT_POWER_MGMT, power_mgmt_hdr),
986 EV_PFF(SWITCHTEC_IOCTL_EVENT_TLP_THROTTLING, tlp_throttling_hdr),
987 EV_PFF(SWITCHTEC_IOCTL_EVENT_FORCE_SPEED, force_speed_hdr),
988 EV_PFF(SWITCHTEC_IOCTL_EVENT_CREDIT_TIMEOUT, credit_timeout_hdr),
989 EV_PFF(SWITCHTEC_IOCTL_EVENT_LINK_STATE, link_state_hdr),
990 };
991
event_hdr_addr(struct switchtec_dev * stdev,int event_id,int index)992 static u32 __iomem *event_hdr_addr(struct switchtec_dev *stdev,
993 int event_id, int index)
994 {
995 size_t off;
996
997 if (event_id < 0 || event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
998 return (u32 __iomem *)ERR_PTR(-EINVAL);
999
1000 off = event_regs[event_id].offset;
1001
1002 if (event_regs[event_id].map_reg == part_ev_reg) {
1003 if (index == SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX)
1004 index = stdev->partition;
1005 else if (index < 0 || index >= stdev->partition_count)
1006 return (u32 __iomem *)ERR_PTR(-EINVAL);
1007 } else if (event_regs[event_id].map_reg == pff_ev_reg) {
1008 if (index < 0 || index >= stdev->pff_csr_count)
1009 return (u32 __iomem *)ERR_PTR(-EINVAL);
1010 }
1011
1012 return event_regs[event_id].map_reg(stdev, off, index);
1013 }
1014
event_ctl(struct switchtec_dev * stdev,struct switchtec_ioctl_event_ctl * ctl)1015 static int event_ctl(struct switchtec_dev *stdev,
1016 struct switchtec_ioctl_event_ctl *ctl)
1017 {
1018 int i;
1019 u32 __iomem *reg;
1020 u32 hdr;
1021
1022 reg = event_hdr_addr(stdev, ctl->event_id, ctl->index);
1023 if (IS_ERR(reg))
1024 return PTR_ERR(reg);
1025
1026 hdr = ioread32(reg);
1027 if (hdr & SWITCHTEC_EVENT_NOT_SUPP)
1028 return -EOPNOTSUPP;
1029
1030 for (i = 0; i < ARRAY_SIZE(ctl->data); i++)
1031 ctl->data[i] = ioread32(®[i + 1]);
1032
1033 ctl->occurred = hdr & SWITCHTEC_EVENT_OCCURRED;
1034 ctl->count = (hdr >> 5) & 0xFF;
1035
1036 if (!(ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_CLEAR))
1037 hdr &= ~SWITCHTEC_EVENT_CLEAR;
1038 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL)
1039 hdr |= SWITCHTEC_EVENT_EN_IRQ;
1040 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_POLL)
1041 hdr &= ~SWITCHTEC_EVENT_EN_IRQ;
1042 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_LOG)
1043 hdr |= SWITCHTEC_EVENT_EN_LOG;
1044 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_LOG)
1045 hdr &= ~SWITCHTEC_EVENT_EN_LOG;
1046 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_CLI)
1047 hdr |= SWITCHTEC_EVENT_EN_CLI;
1048 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_CLI)
1049 hdr &= ~SWITCHTEC_EVENT_EN_CLI;
1050 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_FATAL)
1051 hdr |= SWITCHTEC_EVENT_FATAL;
1052 if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_FATAL)
1053 hdr &= ~SWITCHTEC_EVENT_FATAL;
1054
1055 if (ctl->flags)
1056 iowrite32(hdr, reg);
1057
1058 ctl->flags = 0;
1059 if (hdr & SWITCHTEC_EVENT_EN_IRQ)
1060 ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL;
1061 if (hdr & SWITCHTEC_EVENT_EN_LOG)
1062 ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_LOG;
1063 if (hdr & SWITCHTEC_EVENT_EN_CLI)
1064 ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_CLI;
1065 if (hdr & SWITCHTEC_EVENT_FATAL)
1066 ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_FATAL;
1067
1068 return 0;
1069 }
1070
ioctl_event_ctl(struct switchtec_dev * stdev,struct switchtec_ioctl_event_ctl __user * uctl)1071 static int ioctl_event_ctl(struct switchtec_dev *stdev,
1072 struct switchtec_ioctl_event_ctl __user *uctl)
1073 {
1074 int ret;
1075 int nr_idxs;
1076 unsigned int event_flags;
1077 struct switchtec_ioctl_event_ctl ctl;
1078
1079 if (copy_from_user(&ctl, uctl, sizeof(ctl)))
1080 return -EFAULT;
1081
1082 if (ctl.event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
1083 return -EINVAL;
1084
1085 if (ctl.flags & SWITCHTEC_IOCTL_EVENT_FLAG_UNUSED)
1086 return -EINVAL;
1087
1088 if (ctl.index == SWITCHTEC_IOCTL_EVENT_IDX_ALL) {
1089 if (event_regs[ctl.event_id].map_reg == global_ev_reg)
1090 nr_idxs = 1;
1091 else if (event_regs[ctl.event_id].map_reg == part_ev_reg)
1092 nr_idxs = stdev->partition_count;
1093 else if (event_regs[ctl.event_id].map_reg == pff_ev_reg)
1094 nr_idxs = stdev->pff_csr_count;
1095 else
1096 return -EINVAL;
1097
1098 event_flags = ctl.flags;
1099 for (ctl.index = 0; ctl.index < nr_idxs; ctl.index++) {
1100 ctl.flags = event_flags;
1101 ret = event_ctl(stdev, &ctl);
1102 if (ret < 0 && ret != -EOPNOTSUPP)
1103 return ret;
1104 }
1105 } else {
1106 ret = event_ctl(stdev, &ctl);
1107 if (ret < 0)
1108 return ret;
1109 }
1110
1111 if (copy_to_user(uctl, &ctl, sizeof(ctl)))
1112 return -EFAULT;
1113
1114 return 0;
1115 }
1116
ioctl_pff_to_port(struct switchtec_dev * stdev,struct switchtec_ioctl_pff_port __user * up)1117 static int ioctl_pff_to_port(struct switchtec_dev *stdev,
1118 struct switchtec_ioctl_pff_port __user *up)
1119 {
1120 int i, part;
1121 u32 reg;
1122 struct part_cfg_regs __iomem *pcfg;
1123 struct switchtec_ioctl_pff_port p;
1124
1125 if (copy_from_user(&p, up, sizeof(p)))
1126 return -EFAULT;
1127
1128 p.port = -1;
1129 for (part = 0; part < stdev->partition_count; part++) {
1130 pcfg = &stdev->mmio_part_cfg_all[part];
1131 p.partition = part;
1132
1133 reg = ioread32(&pcfg->usp_pff_inst_id);
1134 if (reg == p.pff) {
1135 p.port = 0;
1136 break;
1137 }
1138
1139 reg = ioread32(&pcfg->vep_pff_inst_id) & 0xFF;
1140 if (reg == p.pff) {
1141 p.port = SWITCHTEC_IOCTL_PFF_VEP;
1142 break;
1143 }
1144
1145 for (i = 0; i < ARRAY_SIZE(pcfg->dsp_pff_inst_id); i++) {
1146 reg = ioread32(&pcfg->dsp_pff_inst_id[i]);
1147 if (reg != p.pff)
1148 continue;
1149
1150 p.port = i + 1;
1151 break;
1152 }
1153
1154 if (p.port != -1)
1155 break;
1156 }
1157
1158 if (copy_to_user(up, &p, sizeof(p)))
1159 return -EFAULT;
1160
1161 return 0;
1162 }
1163
ioctl_port_to_pff(struct switchtec_dev * stdev,struct switchtec_ioctl_pff_port __user * up)1164 static int ioctl_port_to_pff(struct switchtec_dev *stdev,
1165 struct switchtec_ioctl_pff_port __user *up)
1166 {
1167 struct switchtec_ioctl_pff_port p;
1168 struct part_cfg_regs __iomem *pcfg;
1169
1170 if (copy_from_user(&p, up, sizeof(p)))
1171 return -EFAULT;
1172
1173 if (p.partition == SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX)
1174 pcfg = stdev->mmio_part_cfg;
1175 else if (p.partition < stdev->partition_count)
1176 pcfg = &stdev->mmio_part_cfg_all[p.partition];
1177 else
1178 return -EINVAL;
1179
1180 switch (p.port) {
1181 case 0:
1182 p.pff = ioread32(&pcfg->usp_pff_inst_id);
1183 break;
1184 case SWITCHTEC_IOCTL_PFF_VEP:
1185 p.pff = ioread32(&pcfg->vep_pff_inst_id) & 0xFF;
1186 break;
1187 default:
1188 if (p.port > ARRAY_SIZE(pcfg->dsp_pff_inst_id))
1189 return -EINVAL;
1190 p.port = array_index_nospec(p.port,
1191 ARRAY_SIZE(pcfg->dsp_pff_inst_id) + 1);
1192 p.pff = ioread32(&pcfg->dsp_pff_inst_id[p.port - 1]);
1193 break;
1194 }
1195
1196 if (copy_to_user(up, &p, sizeof(p)))
1197 return -EFAULT;
1198
1199 return 0;
1200 }
1201
switchtec_dev_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1202 static long switchtec_dev_ioctl(struct file *filp, unsigned int cmd,
1203 unsigned long arg)
1204 {
1205 struct switchtec_user *stuser = filp->private_data;
1206 struct switchtec_dev *stdev = stuser->stdev;
1207 int rc;
1208 void __user *argp = (void __user *)arg;
1209
1210 rc = lock_mutex_and_test_alive(stdev);
1211 if (rc)
1212 return rc;
1213
1214 switch (cmd) {
1215 case SWITCHTEC_IOCTL_FLASH_INFO:
1216 rc = ioctl_flash_info(stdev, argp);
1217 break;
1218 case SWITCHTEC_IOCTL_FLASH_PART_INFO:
1219 rc = ioctl_flash_part_info(stdev, argp);
1220 break;
1221 case SWITCHTEC_IOCTL_EVENT_SUMMARY_LEGACY:
1222 rc = ioctl_event_summary(stdev, stuser, argp,
1223 sizeof(struct switchtec_ioctl_event_summary_legacy));
1224 break;
1225 case SWITCHTEC_IOCTL_EVENT_CTL:
1226 rc = ioctl_event_ctl(stdev, argp);
1227 break;
1228 case SWITCHTEC_IOCTL_PFF_TO_PORT:
1229 rc = ioctl_pff_to_port(stdev, argp);
1230 break;
1231 case SWITCHTEC_IOCTL_PORT_TO_PFF:
1232 rc = ioctl_port_to_pff(stdev, argp);
1233 break;
1234 case SWITCHTEC_IOCTL_EVENT_SUMMARY:
1235 rc = ioctl_event_summary(stdev, stuser, argp,
1236 sizeof(struct switchtec_ioctl_event_summary));
1237 break;
1238 default:
1239 rc = -ENOTTY;
1240 break;
1241 }
1242
1243 mutex_unlock(&stdev->mrpc_mutex);
1244 return rc;
1245 }
1246
1247 static const struct file_operations switchtec_fops = {
1248 .owner = THIS_MODULE,
1249 .open = switchtec_dev_open,
1250 .release = switchtec_dev_release,
1251 .write = switchtec_dev_write,
1252 .read = switchtec_dev_read,
1253 .poll = switchtec_dev_poll,
1254 .unlocked_ioctl = switchtec_dev_ioctl,
1255 .compat_ioctl = compat_ptr_ioctl,
1256 };
1257
link_event_work(struct work_struct * work)1258 static void link_event_work(struct work_struct *work)
1259 {
1260 struct switchtec_dev *stdev;
1261
1262 stdev = container_of(work, struct switchtec_dev, link_event_work);
1263
1264 if (stdev->link_notifier)
1265 stdev->link_notifier(stdev);
1266 }
1267
check_link_state_events(struct switchtec_dev * stdev)1268 static void check_link_state_events(struct switchtec_dev *stdev)
1269 {
1270 int idx;
1271 u32 reg;
1272 int count;
1273 int occurred = 0;
1274
1275 for (idx = 0; idx < stdev->pff_csr_count; idx++) {
1276 reg = ioread32(&stdev->mmio_pff_csr[idx].link_state_hdr);
1277 dev_dbg(&stdev->dev, "link_state: %d->%08x\n", idx, reg);
1278 count = (reg >> 5) & 0xFF;
1279
1280 if (count != stdev->link_event_count[idx]) {
1281 occurred = 1;
1282 stdev->link_event_count[idx] = count;
1283 }
1284 }
1285
1286 if (occurred)
1287 schedule_work(&stdev->link_event_work);
1288 }
1289
enable_link_state_events(struct switchtec_dev * stdev)1290 static void enable_link_state_events(struct switchtec_dev *stdev)
1291 {
1292 int idx;
1293
1294 for (idx = 0; idx < stdev->pff_csr_count; idx++) {
1295 iowrite32(SWITCHTEC_EVENT_CLEAR |
1296 SWITCHTEC_EVENT_EN_IRQ,
1297 &stdev->mmio_pff_csr[idx].link_state_hdr);
1298 }
1299 }
1300
enable_dma_mrpc(struct switchtec_dev * stdev)1301 static void enable_dma_mrpc(struct switchtec_dev *stdev)
1302 {
1303 writeq(stdev->dma_mrpc_dma_addr, &stdev->mmio_mrpc->dma_addr);
1304 flush_wc_buf(stdev);
1305 iowrite32(SWITCHTEC_DMA_MRPC_EN, &stdev->mmio_mrpc->dma_en);
1306 }
1307
stdev_release(struct device * dev)1308 static void stdev_release(struct device *dev)
1309 {
1310 struct switchtec_dev *stdev = to_stdev(dev);
1311
1312 if (stdev->dma_mrpc) {
1313 iowrite32(0, &stdev->mmio_mrpc->dma_en);
1314 flush_wc_buf(stdev);
1315 writeq(0, &stdev->mmio_mrpc->dma_addr);
1316 dma_free_coherent(&stdev->pdev->dev, sizeof(*stdev->dma_mrpc),
1317 stdev->dma_mrpc, stdev->dma_mrpc_dma_addr);
1318 }
1319 kfree(stdev);
1320 }
1321
stdev_kill(struct switchtec_dev * stdev)1322 static void stdev_kill(struct switchtec_dev *stdev)
1323 {
1324 struct switchtec_user *stuser, *tmpuser;
1325
1326 pci_clear_master(stdev->pdev);
1327
1328 cancel_delayed_work_sync(&stdev->mrpc_timeout);
1329
1330 /* Mark the hardware as unavailable and complete all completions */
1331 mutex_lock(&stdev->mrpc_mutex);
1332 stdev->alive = false;
1333
1334 /* Wake up and kill any users waiting on an MRPC request */
1335 list_for_each_entry_safe(stuser, tmpuser, &stdev->mrpc_queue, list) {
1336 stuser->cmd_done = true;
1337 wake_up_interruptible(&stuser->cmd_comp);
1338 list_del_init(&stuser->list);
1339 stuser_put(stuser);
1340 }
1341
1342 mutex_unlock(&stdev->mrpc_mutex);
1343
1344 /* Wake up any users waiting on event_wq */
1345 wake_up_interruptible(&stdev->event_wq);
1346 }
1347
stdev_create(struct pci_dev * pdev)1348 static struct switchtec_dev *stdev_create(struct pci_dev *pdev)
1349 {
1350 struct switchtec_dev *stdev;
1351 int minor;
1352 struct device *dev;
1353 struct cdev *cdev;
1354 int rc;
1355
1356 stdev = kzalloc_node(sizeof(*stdev), GFP_KERNEL,
1357 dev_to_node(&pdev->dev));
1358 if (!stdev)
1359 return ERR_PTR(-ENOMEM);
1360
1361 stdev->alive = true;
1362 stdev->pdev = pdev;
1363 INIT_LIST_HEAD(&stdev->mrpc_queue);
1364 mutex_init(&stdev->mrpc_mutex);
1365 stdev->mrpc_busy = 0;
1366 INIT_WORK(&stdev->mrpc_work, mrpc_event_work);
1367 INIT_DELAYED_WORK(&stdev->mrpc_timeout, mrpc_timeout_work);
1368 INIT_WORK(&stdev->link_event_work, link_event_work);
1369 init_waitqueue_head(&stdev->event_wq);
1370 atomic_set(&stdev->event_cnt, 0);
1371
1372 dev = &stdev->dev;
1373 device_initialize(dev);
1374 dev->class = switchtec_class;
1375 dev->parent = &pdev->dev;
1376 dev->groups = switchtec_device_groups;
1377 dev->release = stdev_release;
1378
1379 minor = ida_alloc(&switchtec_minor_ida, GFP_KERNEL);
1380 if (minor < 0) {
1381 rc = minor;
1382 goto err_put;
1383 }
1384
1385 dev->devt = MKDEV(MAJOR(switchtec_devt), minor);
1386 dev_set_name(dev, "switchtec%d", minor);
1387
1388 cdev = &stdev->cdev;
1389 cdev_init(cdev, &switchtec_fops);
1390 cdev->owner = THIS_MODULE;
1391
1392 return stdev;
1393
1394 err_put:
1395 put_device(&stdev->dev);
1396 return ERR_PTR(rc);
1397 }
1398
mask_event(struct switchtec_dev * stdev,int eid,int idx)1399 static int mask_event(struct switchtec_dev *stdev, int eid, int idx)
1400 {
1401 size_t off = event_regs[eid].offset;
1402 u32 __iomem *hdr_reg;
1403 u32 hdr;
1404
1405 hdr_reg = event_regs[eid].map_reg(stdev, off, idx);
1406 hdr = ioread32(hdr_reg);
1407
1408 if (hdr & SWITCHTEC_EVENT_NOT_SUPP)
1409 return 0;
1410
1411 if (!(hdr & SWITCHTEC_EVENT_OCCURRED && hdr & SWITCHTEC_EVENT_EN_IRQ))
1412 return 0;
1413
1414 dev_dbg(&stdev->dev, "%s: %d %d %x\n", __func__, eid, idx, hdr);
1415 hdr &= ~(SWITCHTEC_EVENT_EN_IRQ | SWITCHTEC_EVENT_OCCURRED);
1416 iowrite32(hdr, hdr_reg);
1417
1418 return 1;
1419 }
1420
mask_all_events(struct switchtec_dev * stdev,int eid)1421 static int mask_all_events(struct switchtec_dev *stdev, int eid)
1422 {
1423 int idx;
1424 int count = 0;
1425
1426 if (event_regs[eid].map_reg == part_ev_reg) {
1427 for (idx = 0; idx < stdev->partition_count; idx++)
1428 count += mask_event(stdev, eid, idx);
1429 } else if (event_regs[eid].map_reg == pff_ev_reg) {
1430 for (idx = 0; idx < stdev->pff_csr_count; idx++) {
1431 if (!stdev->pff_local[idx])
1432 continue;
1433
1434 count += mask_event(stdev, eid, idx);
1435 }
1436 } else {
1437 count += mask_event(stdev, eid, 0);
1438 }
1439
1440 return count;
1441 }
1442
switchtec_event_isr(int irq,void * dev)1443 static irqreturn_t switchtec_event_isr(int irq, void *dev)
1444 {
1445 struct switchtec_dev *stdev = dev;
1446 u32 reg;
1447 irqreturn_t ret = IRQ_NONE;
1448 int eid, event_count = 0;
1449
1450 reg = ioread32(&stdev->mmio_part_cfg->mrpc_comp_hdr);
1451 if (reg & SWITCHTEC_EVENT_OCCURRED) {
1452 dev_dbg(&stdev->dev, "%s: mrpc comp\n", __func__);
1453 ret = IRQ_HANDLED;
1454 schedule_work(&stdev->mrpc_work);
1455 iowrite32(reg, &stdev->mmio_part_cfg->mrpc_comp_hdr);
1456 }
1457
1458 check_link_state_events(stdev);
1459
1460 for (eid = 0; eid < SWITCHTEC_IOCTL_MAX_EVENTS; eid++) {
1461 if (eid == SWITCHTEC_IOCTL_EVENT_LINK_STATE ||
1462 eid == SWITCHTEC_IOCTL_EVENT_MRPC_COMP)
1463 continue;
1464
1465 event_count += mask_all_events(stdev, eid);
1466 }
1467
1468 if (event_count) {
1469 atomic_inc(&stdev->event_cnt);
1470 wake_up_interruptible(&stdev->event_wq);
1471 dev_dbg(&stdev->dev, "%s: %d events\n", __func__,
1472 event_count);
1473 return IRQ_HANDLED;
1474 }
1475
1476 return ret;
1477 }
1478
1479
switchtec_dma_mrpc_isr(int irq,void * dev)1480 static irqreturn_t switchtec_dma_mrpc_isr(int irq, void *dev)
1481 {
1482 struct switchtec_dev *stdev = dev;
1483 irqreturn_t ret = IRQ_NONE;
1484
1485 iowrite32(SWITCHTEC_EVENT_CLEAR |
1486 SWITCHTEC_EVENT_EN_IRQ,
1487 &stdev->mmio_part_cfg->mrpc_comp_hdr);
1488 schedule_work(&stdev->mrpc_work);
1489
1490 ret = IRQ_HANDLED;
1491 return ret;
1492 }
1493
switchtec_init_isr(struct switchtec_dev * stdev)1494 static int switchtec_init_isr(struct switchtec_dev *stdev)
1495 {
1496 int nvecs;
1497 int event_irq;
1498 int dma_mrpc_irq;
1499 int rc;
1500
1501 if (nirqs < 4)
1502 nirqs = 4;
1503
1504 nvecs = pci_alloc_irq_vectors(stdev->pdev, 1, nirqs,
1505 PCI_IRQ_MSIX | PCI_IRQ_MSI |
1506 PCI_IRQ_VIRTUAL);
1507 if (nvecs < 0)
1508 return nvecs;
1509
1510 event_irq = ioread16(&stdev->mmio_part_cfg->vep_vector_number);
1511 if (event_irq < 0 || event_irq >= nvecs)
1512 return -EFAULT;
1513
1514 event_irq = pci_irq_vector(stdev->pdev, event_irq);
1515 if (event_irq < 0)
1516 return event_irq;
1517
1518 rc = devm_request_irq(&stdev->pdev->dev, event_irq,
1519 switchtec_event_isr, 0,
1520 KBUILD_MODNAME, stdev);
1521
1522 if (rc)
1523 return rc;
1524
1525 if (!stdev->dma_mrpc)
1526 return rc;
1527
1528 dma_mrpc_irq = ioread32(&stdev->mmio_mrpc->dma_vector);
1529 if (dma_mrpc_irq < 0 || dma_mrpc_irq >= nvecs)
1530 return -EFAULT;
1531
1532 dma_mrpc_irq = pci_irq_vector(stdev->pdev, dma_mrpc_irq);
1533 if (dma_mrpc_irq < 0)
1534 return dma_mrpc_irq;
1535
1536 rc = devm_request_irq(&stdev->pdev->dev, dma_mrpc_irq,
1537 switchtec_dma_mrpc_isr, 0,
1538 KBUILD_MODNAME, stdev);
1539
1540 return rc;
1541 }
1542
init_pff(struct switchtec_dev * stdev)1543 static void init_pff(struct switchtec_dev *stdev)
1544 {
1545 int i;
1546 u32 reg;
1547 struct part_cfg_regs __iomem *pcfg = stdev->mmio_part_cfg;
1548
1549 for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
1550 reg = ioread16(&stdev->mmio_pff_csr[i].vendor_id);
1551 if (reg != PCI_VENDOR_ID_MICROSEMI)
1552 break;
1553 }
1554
1555 stdev->pff_csr_count = i;
1556
1557 reg = ioread32(&pcfg->usp_pff_inst_id);
1558 if (reg < stdev->pff_csr_count)
1559 stdev->pff_local[reg] = 1;
1560
1561 reg = ioread32(&pcfg->vep_pff_inst_id) & 0xFF;
1562 if (reg < stdev->pff_csr_count)
1563 stdev->pff_local[reg] = 1;
1564
1565 for (i = 0; i < ARRAY_SIZE(pcfg->dsp_pff_inst_id); i++) {
1566 reg = ioread32(&pcfg->dsp_pff_inst_id[i]);
1567 if (reg < stdev->pff_csr_count)
1568 stdev->pff_local[reg] = 1;
1569 }
1570 }
1571
switchtec_init_pci(struct switchtec_dev * stdev,struct pci_dev * pdev)1572 static int switchtec_init_pci(struct switchtec_dev *stdev,
1573 struct pci_dev *pdev)
1574 {
1575 int rc;
1576 void __iomem *map;
1577 unsigned long res_start, res_len;
1578 u32 __iomem *part_id;
1579
1580 rc = pcim_enable_device(pdev);
1581 if (rc)
1582 return rc;
1583
1584 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
1585 if (rc)
1586 return rc;
1587
1588 pci_set_master(pdev);
1589
1590 res_start = pci_resource_start(pdev, 0);
1591 res_len = pci_resource_len(pdev, 0);
1592
1593 if (!devm_request_mem_region(&pdev->dev, res_start,
1594 res_len, KBUILD_MODNAME))
1595 return -EBUSY;
1596
1597 stdev->mmio_mrpc = devm_ioremap_wc(&pdev->dev, res_start,
1598 SWITCHTEC_GAS_TOP_CFG_OFFSET);
1599 if (!stdev->mmio_mrpc)
1600 return -ENOMEM;
1601
1602 map = devm_ioremap(&pdev->dev,
1603 res_start + SWITCHTEC_GAS_TOP_CFG_OFFSET,
1604 res_len - SWITCHTEC_GAS_TOP_CFG_OFFSET);
1605 if (!map)
1606 return -ENOMEM;
1607
1608 stdev->mmio = map - SWITCHTEC_GAS_TOP_CFG_OFFSET;
1609 stdev->mmio_sw_event = stdev->mmio + SWITCHTEC_GAS_SW_EVENT_OFFSET;
1610 stdev->mmio_sys_info = stdev->mmio + SWITCHTEC_GAS_SYS_INFO_OFFSET;
1611 stdev->mmio_flash_info = stdev->mmio + SWITCHTEC_GAS_FLASH_INFO_OFFSET;
1612 stdev->mmio_ntb = stdev->mmio + SWITCHTEC_GAS_NTB_OFFSET;
1613
1614 if (stdev->gen == SWITCHTEC_GEN3)
1615 part_id = &stdev->mmio_sys_info->gen3.partition_id;
1616 else if (stdev->gen == SWITCHTEC_GEN4)
1617 part_id = &stdev->mmio_sys_info->gen4.partition_id;
1618 else
1619 return -EOPNOTSUPP;
1620
1621 stdev->partition = ioread8(part_id);
1622 stdev->partition_count = ioread8(&stdev->mmio_ntb->partition_count);
1623 stdev->mmio_part_cfg_all = stdev->mmio + SWITCHTEC_GAS_PART_CFG_OFFSET;
1624 stdev->mmio_part_cfg = &stdev->mmio_part_cfg_all[stdev->partition];
1625 stdev->mmio_pff_csr = stdev->mmio + SWITCHTEC_GAS_PFF_CSR_OFFSET;
1626
1627 if (stdev->partition_count < 1)
1628 stdev->partition_count = 1;
1629
1630 init_pff(stdev);
1631
1632 pci_set_drvdata(pdev, stdev);
1633
1634 if (!use_dma_mrpc)
1635 return 0;
1636
1637 if (ioread32(&stdev->mmio_mrpc->dma_ver) == 0)
1638 return 0;
1639
1640 stdev->dma_mrpc = dma_alloc_coherent(&stdev->pdev->dev,
1641 sizeof(*stdev->dma_mrpc),
1642 &stdev->dma_mrpc_dma_addr,
1643 GFP_KERNEL);
1644 if (stdev->dma_mrpc == NULL)
1645 return -ENOMEM;
1646
1647 return 0;
1648 }
1649
switchtec_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)1650 static int switchtec_pci_probe(struct pci_dev *pdev,
1651 const struct pci_device_id *id)
1652 {
1653 struct switchtec_dev *stdev;
1654 int rc;
1655
1656 if (pdev->class == (PCI_CLASS_BRIDGE_OTHER << 8))
1657 request_module_nowait("ntb_hw_switchtec");
1658
1659 stdev = stdev_create(pdev);
1660 if (IS_ERR(stdev))
1661 return PTR_ERR(stdev);
1662
1663 stdev->gen = id->driver_data;
1664
1665 rc = switchtec_init_pci(stdev, pdev);
1666 if (rc)
1667 goto err_put;
1668
1669 rc = switchtec_init_isr(stdev);
1670 if (rc) {
1671 dev_err(&stdev->dev, "failed to init isr.\n");
1672 goto err_put;
1673 }
1674
1675 iowrite32(SWITCHTEC_EVENT_CLEAR |
1676 SWITCHTEC_EVENT_EN_IRQ,
1677 &stdev->mmio_part_cfg->mrpc_comp_hdr);
1678 enable_link_state_events(stdev);
1679
1680 if (stdev->dma_mrpc)
1681 enable_dma_mrpc(stdev);
1682
1683 rc = cdev_device_add(&stdev->cdev, &stdev->dev);
1684 if (rc)
1685 goto err_devadd;
1686
1687 dev_info(&stdev->dev, "Management device registered.\n");
1688
1689 return 0;
1690
1691 err_devadd:
1692 stdev_kill(stdev);
1693 err_put:
1694 ida_free(&switchtec_minor_ida, MINOR(stdev->dev.devt));
1695 put_device(&stdev->dev);
1696 return rc;
1697 }
1698
switchtec_pci_remove(struct pci_dev * pdev)1699 static void switchtec_pci_remove(struct pci_dev *pdev)
1700 {
1701 struct switchtec_dev *stdev = pci_get_drvdata(pdev);
1702
1703 pci_set_drvdata(pdev, NULL);
1704
1705 cdev_device_del(&stdev->cdev, &stdev->dev);
1706 ida_free(&switchtec_minor_ida, MINOR(stdev->dev.devt));
1707 dev_info(&stdev->dev, "unregistered.\n");
1708 stdev_kill(stdev);
1709 put_device(&stdev->dev);
1710 }
1711
1712 #define SWITCHTEC_PCI_DEVICE(device_id, gen) \
1713 { \
1714 .vendor = PCI_VENDOR_ID_MICROSEMI, \
1715 .device = device_id, \
1716 .subvendor = PCI_ANY_ID, \
1717 .subdevice = PCI_ANY_ID, \
1718 .class = (PCI_CLASS_MEMORY_OTHER << 8), \
1719 .class_mask = 0xFFFFFFFF, \
1720 .driver_data = gen, \
1721 }, \
1722 { \
1723 .vendor = PCI_VENDOR_ID_MICROSEMI, \
1724 .device = device_id, \
1725 .subvendor = PCI_ANY_ID, \
1726 .subdevice = PCI_ANY_ID, \
1727 .class = (PCI_CLASS_BRIDGE_OTHER << 8), \
1728 .class_mask = 0xFFFFFFFF, \
1729 .driver_data = gen, \
1730 }
1731
1732 static const struct pci_device_id switchtec_pci_tbl[] = {
1733 SWITCHTEC_PCI_DEVICE(0x8531, SWITCHTEC_GEN3), //PFX 24xG3
1734 SWITCHTEC_PCI_DEVICE(0x8532, SWITCHTEC_GEN3), //PFX 32xG3
1735 SWITCHTEC_PCI_DEVICE(0x8533, SWITCHTEC_GEN3), //PFX 48xG3
1736 SWITCHTEC_PCI_DEVICE(0x8534, SWITCHTEC_GEN3), //PFX 64xG3
1737 SWITCHTEC_PCI_DEVICE(0x8535, SWITCHTEC_GEN3), //PFX 80xG3
1738 SWITCHTEC_PCI_DEVICE(0x8536, SWITCHTEC_GEN3), //PFX 96xG3
1739 SWITCHTEC_PCI_DEVICE(0x8541, SWITCHTEC_GEN3), //PSX 24xG3
1740 SWITCHTEC_PCI_DEVICE(0x8542, SWITCHTEC_GEN3), //PSX 32xG3
1741 SWITCHTEC_PCI_DEVICE(0x8543, SWITCHTEC_GEN3), //PSX 48xG3
1742 SWITCHTEC_PCI_DEVICE(0x8544, SWITCHTEC_GEN3), //PSX 64xG3
1743 SWITCHTEC_PCI_DEVICE(0x8545, SWITCHTEC_GEN3), //PSX 80xG3
1744 SWITCHTEC_PCI_DEVICE(0x8546, SWITCHTEC_GEN3), //PSX 96xG3
1745 SWITCHTEC_PCI_DEVICE(0x8551, SWITCHTEC_GEN3), //PAX 24XG3
1746 SWITCHTEC_PCI_DEVICE(0x8552, SWITCHTEC_GEN3), //PAX 32XG3
1747 SWITCHTEC_PCI_DEVICE(0x8553, SWITCHTEC_GEN3), //PAX 48XG3
1748 SWITCHTEC_PCI_DEVICE(0x8554, SWITCHTEC_GEN3), //PAX 64XG3
1749 SWITCHTEC_PCI_DEVICE(0x8555, SWITCHTEC_GEN3), //PAX 80XG3
1750 SWITCHTEC_PCI_DEVICE(0x8556, SWITCHTEC_GEN3), //PAX 96XG3
1751 SWITCHTEC_PCI_DEVICE(0x8561, SWITCHTEC_GEN3), //PFXL 24XG3
1752 SWITCHTEC_PCI_DEVICE(0x8562, SWITCHTEC_GEN3), //PFXL 32XG3
1753 SWITCHTEC_PCI_DEVICE(0x8563, SWITCHTEC_GEN3), //PFXL 48XG3
1754 SWITCHTEC_PCI_DEVICE(0x8564, SWITCHTEC_GEN3), //PFXL 64XG3
1755 SWITCHTEC_PCI_DEVICE(0x8565, SWITCHTEC_GEN3), //PFXL 80XG3
1756 SWITCHTEC_PCI_DEVICE(0x8566, SWITCHTEC_GEN3), //PFXL 96XG3
1757 SWITCHTEC_PCI_DEVICE(0x8571, SWITCHTEC_GEN3), //PFXI 24XG3
1758 SWITCHTEC_PCI_DEVICE(0x8572, SWITCHTEC_GEN3), //PFXI 32XG3
1759 SWITCHTEC_PCI_DEVICE(0x8573, SWITCHTEC_GEN3), //PFXI 48XG3
1760 SWITCHTEC_PCI_DEVICE(0x8574, SWITCHTEC_GEN3), //PFXI 64XG3
1761 SWITCHTEC_PCI_DEVICE(0x8575, SWITCHTEC_GEN3), //PFXI 80XG3
1762 SWITCHTEC_PCI_DEVICE(0x8576, SWITCHTEC_GEN3), //PFXI 96XG3
1763 SWITCHTEC_PCI_DEVICE(0x4000, SWITCHTEC_GEN4), //PFX 100XG4
1764 SWITCHTEC_PCI_DEVICE(0x4084, SWITCHTEC_GEN4), //PFX 84XG4
1765 SWITCHTEC_PCI_DEVICE(0x4068, SWITCHTEC_GEN4), //PFX 68XG4
1766 SWITCHTEC_PCI_DEVICE(0x4052, SWITCHTEC_GEN4), //PFX 52XG4
1767 SWITCHTEC_PCI_DEVICE(0x4036, SWITCHTEC_GEN4), //PFX 36XG4
1768 SWITCHTEC_PCI_DEVICE(0x4028, SWITCHTEC_GEN4), //PFX 28XG4
1769 SWITCHTEC_PCI_DEVICE(0x4100, SWITCHTEC_GEN4), //PSX 100XG4
1770 SWITCHTEC_PCI_DEVICE(0x4184, SWITCHTEC_GEN4), //PSX 84XG4
1771 SWITCHTEC_PCI_DEVICE(0x4168, SWITCHTEC_GEN4), //PSX 68XG4
1772 SWITCHTEC_PCI_DEVICE(0x4152, SWITCHTEC_GEN4), //PSX 52XG4
1773 SWITCHTEC_PCI_DEVICE(0x4136, SWITCHTEC_GEN4), //PSX 36XG4
1774 SWITCHTEC_PCI_DEVICE(0x4128, SWITCHTEC_GEN4), //PSX 28XG4
1775 SWITCHTEC_PCI_DEVICE(0x4200, SWITCHTEC_GEN4), //PAX 100XG4
1776 SWITCHTEC_PCI_DEVICE(0x4284, SWITCHTEC_GEN4), //PAX 84XG4
1777 SWITCHTEC_PCI_DEVICE(0x4268, SWITCHTEC_GEN4), //PAX 68XG4
1778 SWITCHTEC_PCI_DEVICE(0x4252, SWITCHTEC_GEN4), //PAX 52XG4
1779 SWITCHTEC_PCI_DEVICE(0x4236, SWITCHTEC_GEN4), //PAX 36XG4
1780 SWITCHTEC_PCI_DEVICE(0x4228, SWITCHTEC_GEN4), //PAX 28XG4
1781 SWITCHTEC_PCI_DEVICE(0x4352, SWITCHTEC_GEN4), //PFXA 52XG4
1782 SWITCHTEC_PCI_DEVICE(0x4336, SWITCHTEC_GEN4), //PFXA 36XG4
1783 SWITCHTEC_PCI_DEVICE(0x4328, SWITCHTEC_GEN4), //PFXA 28XG4
1784 SWITCHTEC_PCI_DEVICE(0x4452, SWITCHTEC_GEN4), //PSXA 52XG4
1785 SWITCHTEC_PCI_DEVICE(0x4436, SWITCHTEC_GEN4), //PSXA 36XG4
1786 SWITCHTEC_PCI_DEVICE(0x4428, SWITCHTEC_GEN4), //PSXA 28XG4
1787 SWITCHTEC_PCI_DEVICE(0x4552, SWITCHTEC_GEN4), //PAXA 52XG4
1788 SWITCHTEC_PCI_DEVICE(0x4536, SWITCHTEC_GEN4), //PAXA 36XG4
1789 SWITCHTEC_PCI_DEVICE(0x4528, SWITCHTEC_GEN4), //PAXA 28XG4
1790 {0}
1791 };
1792 MODULE_DEVICE_TABLE(pci, switchtec_pci_tbl);
1793
1794 static struct pci_driver switchtec_pci_driver = {
1795 .name = KBUILD_MODNAME,
1796 .id_table = switchtec_pci_tbl,
1797 .probe = switchtec_pci_probe,
1798 .remove = switchtec_pci_remove,
1799 };
1800
switchtec_init(void)1801 static int __init switchtec_init(void)
1802 {
1803 int rc;
1804
1805 rc = alloc_chrdev_region(&switchtec_devt, 0, max_devices,
1806 "switchtec");
1807 if (rc)
1808 return rc;
1809
1810 switchtec_class = class_create(THIS_MODULE, "switchtec");
1811 if (IS_ERR(switchtec_class)) {
1812 rc = PTR_ERR(switchtec_class);
1813 goto err_create_class;
1814 }
1815
1816 rc = pci_register_driver(&switchtec_pci_driver);
1817 if (rc)
1818 goto err_pci_register;
1819
1820 pr_info(KBUILD_MODNAME ": loaded.\n");
1821
1822 return 0;
1823
1824 err_pci_register:
1825 class_destroy(switchtec_class);
1826
1827 err_create_class:
1828 unregister_chrdev_region(switchtec_devt, max_devices);
1829
1830 return rc;
1831 }
1832 module_init(switchtec_init);
1833
switchtec_exit(void)1834 static void __exit switchtec_exit(void)
1835 {
1836 pci_unregister_driver(&switchtec_pci_driver);
1837 class_destroy(switchtec_class);
1838 unregister_chrdev_region(switchtec_devt, max_devices);
1839 ida_destroy(&switchtec_minor_ida);
1840
1841 pr_info(KBUILD_MODNAME ": unloaded.\n");
1842 }
1843 module_exit(switchtec_exit);
1844
