Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Intel MIC Platform Software Stack (MPSS)
3 *
4 * Copyright(c) 2013 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
17 *
18 * Intel MIC Host driver.
19 *
20 */
21#include <linux/debugfs.h>
22#include <linux/pci.h>
23#include <linux/seq_file.h>
24
25#include <linux/mic_common.h>
26#include "../common/mic_dev.h"
27#include "mic_device.h"
28#include "mic_smpt.h"
29#include "mic_virtio.h"
30
31/* Debugfs parent dir */
32static struct dentry *mic_dbg;
33
34/**
35 * mic_log_buf_show - Display MIC kernel log buffer.
36 *
37 * log_buf addr/len is read from System.map by user space
38 * and populated in sysfs entries.
39 */
40static int mic_log_buf_show(struct seq_file *s, void *unused)
41{
42 void __iomem *log_buf_va;
43 int __iomem *log_buf_len_va;
44 struct mic_device *mdev = s->private;
45 void *kva;
46 int size;
47 unsigned long aper_offset;
48
49 if (!mdev || !mdev->log_buf_addr || !mdev->log_buf_len)
50 goto done;
51 /*
52 * Card kernel will never be relocated and any kernel text/data mapping
53 * can be translated to phys address by subtracting __START_KERNEL_map.
54 */
55 aper_offset = (unsigned long)mdev->log_buf_len - __START_KERNEL_map;
56 log_buf_len_va = mdev->aper.va + aper_offset;
57 aper_offset = (unsigned long)mdev->log_buf_addr - __START_KERNEL_map;
58 log_buf_va = mdev->aper.va + aper_offset;
59 size = ioread32(log_buf_len_va);
60
61 kva = kmalloc(size, GFP_KERNEL);
62 if (!kva)
63 goto done;
64 mutex_lock(&mdev->mic_mutex);
65 memcpy_fromio(kva, log_buf_va, size);
66 switch (mdev->state) {
67 case MIC_ONLINE:
68 /* Fall through */
69 case MIC_SHUTTING_DOWN:
70 seq_write(s, kva, size);
71 break;
72 default:
73 break;
74 }
75 mutex_unlock(&mdev->mic_mutex);
76 kfree(kva);
77done:
78 return 0;
79}
80
81static int mic_log_buf_open(struct inode *inode, struct file *file)
82{
83 return single_open(file, mic_log_buf_show, inode->i_private);
84}
85
86static int mic_log_buf_release(struct inode *inode, struct file *file)
87{
88 return single_release(inode, file);
89}
90
91static const struct file_operations log_buf_ops = {
92 .owner = THIS_MODULE,
93 .open = mic_log_buf_open,
94 .read = seq_read,
95 .llseek = seq_lseek,
96 .release = mic_log_buf_release
97};
98
99static int mic_smpt_show(struct seq_file *s, void *pos)
100{
101 int i;
102 struct mic_device *mdev = s->private;
103 unsigned long flags;
104
105 seq_printf(s, "MIC %-2d |%-10s| %-14s %-10s\n",
106 mdev->id, "SMPT entry", "SW DMA addr", "RefCount");
107 seq_puts(s, "====================================================\n");
108
109 if (mdev->smpt) {
110 struct mic_smpt_info *smpt_info = mdev->smpt;
111 spin_lock_irqsave(&smpt_info->smpt_lock, flags);
112 for (i = 0; i < smpt_info->info.num_reg; i++) {
113 seq_printf(s, "%9s|%-10d| %-#14llx %-10lld\n",
114 " ", i, smpt_info->entry[i].dma_addr,
115 smpt_info->entry[i].ref_count);
116 }
117 spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
118 }
119 seq_puts(s, "====================================================\n");
120 return 0;
121}
122
123static int mic_smpt_debug_open(struct inode *inode, struct file *file)
124{
125 return single_open(file, mic_smpt_show, inode->i_private);
126}
127
128static int mic_smpt_debug_release(struct inode *inode, struct file *file)
129{
130 return single_release(inode, file);
131}
132
133static const struct file_operations smpt_file_ops = {
134 .owner = THIS_MODULE,
135 .open = mic_smpt_debug_open,
136 .read = seq_read,
137 .llseek = seq_lseek,
138 .release = mic_smpt_debug_release
139};
140
141static int mic_soft_reset_show(struct seq_file *s, void *pos)
142{
143 struct mic_device *mdev = s->private;
144
145 mic_stop(mdev, true);
146 return 0;
147}
148
149static int mic_soft_reset_debug_open(struct inode *inode, struct file *file)
150{
151 return single_open(file, mic_soft_reset_show, inode->i_private);
152}
153
154static int mic_soft_reset_debug_release(struct inode *inode, struct file *file)
155{
156 return single_release(inode, file);
157}
158
159static const struct file_operations soft_reset_ops = {
160 .owner = THIS_MODULE,
161 .open = mic_soft_reset_debug_open,
162 .read = seq_read,
163 .llseek = seq_lseek,
164 .release = mic_soft_reset_debug_release
165};
166
167static int mic_post_code_show(struct seq_file *s, void *pos)
168{
169 struct mic_device *mdev = s->private;
170 u32 reg = mdev->ops->get_postcode(mdev);
171
172 seq_printf(s, "%c%c", reg & 0xff, (reg >> 8) & 0xff);
173 return 0;
174}
175
176static int mic_post_code_debug_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, mic_post_code_show, inode->i_private);
179}
180
181static int mic_post_code_debug_release(struct inode *inode, struct file *file)
182{
183 return single_release(inode, file);
184}
185
186static const struct file_operations post_code_ops = {
187 .owner = THIS_MODULE,
188 .open = mic_post_code_debug_open,
189 .read = seq_read,
190 .llseek = seq_lseek,
191 .release = mic_post_code_debug_release
192};
193
194static int mic_dp_show(struct seq_file *s, void *pos)
195{
196 struct mic_device *mdev = s->private;
197 struct mic_device_desc *d;
198 struct mic_device_ctrl *dc;
199 struct mic_vqconfig *vqconfig;
200 __u32 *features;
201 __u8 *config;
202 struct mic_bootparam *bootparam = mdev->dp;
203 int i, j;
204
205 seq_printf(s, "Bootparam: magic 0x%x\n",
206 bootparam->magic);
207 seq_printf(s, "Bootparam: h2c_shutdown_db %d\n",
208 bootparam->h2c_shutdown_db);
209 seq_printf(s, "Bootparam: h2c_config_db %d\n",
210 bootparam->h2c_config_db);
211 seq_printf(s, "Bootparam: c2h_shutdown_db %d\n",
212 bootparam->c2h_shutdown_db);
213 seq_printf(s, "Bootparam: shutdown_status %d\n",
214 bootparam->shutdown_status);
215 seq_printf(s, "Bootparam: shutdown_card %d\n",
216 bootparam->shutdown_card);
217 seq_printf(s, "Bootparam: tot_nodes %d\n",
218 bootparam->tot_nodes);
219 seq_printf(s, "Bootparam: node_id %d\n",
220 bootparam->node_id);
221 seq_printf(s, "Bootparam: c2h_scif_db %d\n",
222 bootparam->c2h_scif_db);
223 seq_printf(s, "Bootparam: h2c_scif_db %d\n",
224 bootparam->h2c_scif_db);
225 seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n",
226 bootparam->scif_host_dma_addr);
227 seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n",
228 bootparam->scif_card_dma_addr);
229
230
231 for (i = sizeof(*bootparam); i < MIC_DP_SIZE;
232 i += mic_total_desc_size(d)) {
233 d = mdev->dp + i;
234 dc = (void *)d + mic_aligned_desc_size(d);
235
236 /* end of list */
237 if (d->type == 0)
238 break;
239
240 if (d->type == -1)
241 continue;
242
243 seq_printf(s, "Type %d ", d->type);
244 seq_printf(s, "Num VQ %d ", d->num_vq);
245 seq_printf(s, "Feature Len %d\n", d->feature_len);
246 seq_printf(s, "Config Len %d ", d->config_len);
247 seq_printf(s, "Shutdown Status %d\n", d->status);
248
249 for (j = 0; j < d->num_vq; j++) {
250 vqconfig = mic_vq_config(d) + j;
251 seq_printf(s, "vqconfig[%d]: ", j);
252 seq_printf(s, "address 0x%llx ", vqconfig->address);
253 seq_printf(s, "num %d ", vqconfig->num);
254 seq_printf(s, "used address 0x%llx\n",
255 vqconfig->used_address);
256 }
257
258 features = (__u32 *)mic_vq_features(d);
259 seq_printf(s, "Features: Host 0x%x ", features[0]);
260 seq_printf(s, "Guest 0x%x\n", features[1]);
261
262 config = mic_vq_configspace(d);
263 for (j = 0; j < d->config_len; j++)
264 seq_printf(s, "config[%d]=%d\n", j, config[j]);
265
266 seq_puts(s, "Device control:\n");
267 seq_printf(s, "Config Change %d ", dc->config_change);
268 seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
269 seq_printf(s, "Guest Ack %d ", dc->guest_ack);
270 seq_printf(s, "Host ack %d\n", dc->host_ack);
271 seq_printf(s, "Used address updated %d ",
272 dc->used_address_updated);
273 seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
274 seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
275 seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
276 }
277
278 return 0;
279}
280
281static int mic_dp_debug_open(struct inode *inode, struct file *file)
282{
283 return single_open(file, mic_dp_show, inode->i_private);
284}
285
286static int mic_dp_debug_release(struct inode *inode, struct file *file)
287{
288 return single_release(inode, file);
289}
290
291static const struct file_operations dp_ops = {
292 .owner = THIS_MODULE,
293 .open = mic_dp_debug_open,
294 .read = seq_read,
295 .llseek = seq_lseek,
296 .release = mic_dp_debug_release
297};
298
299static int mic_vdev_info_show(struct seq_file *s, void *unused)
300{
301 struct mic_device *mdev = s->private;
302 struct list_head *pos, *tmp;
303 struct mic_vdev *mvdev;
304 int i, j;
305
306 mutex_lock(&mdev->mic_mutex);
307 list_for_each_safe(pos, tmp, &mdev->vdev_list) {
308 mvdev = list_entry(pos, struct mic_vdev, list);
309 seq_printf(s, "VDEV type %d state %s in %ld out %ld\n",
310 mvdev->virtio_id,
311 mic_vdevup(mvdev) ? "UP" : "DOWN",
312 mvdev->in_bytes,
313 mvdev->out_bytes);
314 for (i = 0; i < MIC_MAX_VRINGS; i++) {
315 struct vring_desc *desc;
316 struct vring_avail *avail;
317 struct vring_used *used;
318 struct mic_vringh *mvr = &mvdev->mvr[i];
319 struct vringh *vrh = &mvr->vrh;
320 int num = vrh->vring.num;
321 if (!num)
322 continue;
323 desc = vrh->vring.desc;
324 seq_printf(s, "vring i %d avail_idx %d",
325 i, mvr->vring.info->avail_idx & (num - 1));
326 seq_printf(s, " vring i %d avail_idx %d\n",
327 i, mvr->vring.info->avail_idx);
328 seq_printf(s, "vrh i %d weak_barriers %d",
329 i, vrh->weak_barriers);
330 seq_printf(s, " last_avail_idx %d last_used_idx %d",
331 vrh->last_avail_idx, vrh->last_used_idx);
332 seq_printf(s, " completed %d\n", vrh->completed);
333 for (j = 0; j < num; j++) {
334 seq_printf(s, "desc[%d] addr 0x%llx len %d",
335 j, desc->addr, desc->len);
336 seq_printf(s, " flags 0x%x next %d\n",
337 desc->flags, desc->next);
338 desc++;
339 }
340 avail = vrh->vring.avail;
341 seq_printf(s, "avail flags 0x%x idx %d\n",
342 vringh16_to_cpu(vrh, avail->flags),
343 vringh16_to_cpu(vrh, avail->idx) & (num - 1));
344 seq_printf(s, "avail flags 0x%x idx %d\n",
345 vringh16_to_cpu(vrh, avail->flags),
346 vringh16_to_cpu(vrh, avail->idx));
347 for (j = 0; j < num; j++)
348 seq_printf(s, "avail ring[%d] %d\n",
349 j, avail->ring[j]);
350 used = vrh->vring.used;
351 seq_printf(s, "used flags 0x%x idx %d\n",
352 vringh16_to_cpu(vrh, used->flags),
353 vringh16_to_cpu(vrh, used->idx) & (num - 1));
354 seq_printf(s, "used flags 0x%x idx %d\n",
355 vringh16_to_cpu(vrh, used->flags),
356 vringh16_to_cpu(vrh, used->idx));
357 for (j = 0; j < num; j++)
358 seq_printf(s, "used ring[%d] id %d len %d\n",
359 j, vringh32_to_cpu(vrh,
360 used->ring[j].id),
361 vringh32_to_cpu(vrh,
362 used->ring[j].len));
363 }
364 }
365 mutex_unlock(&mdev->mic_mutex);
366
367 return 0;
368}
369
370static int mic_vdev_info_debug_open(struct inode *inode, struct file *file)
371{
372 return single_open(file, mic_vdev_info_show, inode->i_private);
373}
374
375static int mic_vdev_info_debug_release(struct inode *inode, struct file *file)
376{
377 return single_release(inode, file);
378}
379
380static const struct file_operations vdev_info_ops = {
381 .owner = THIS_MODULE,
382 .open = mic_vdev_info_debug_open,
383 .read = seq_read,
384 .llseek = seq_lseek,
385 .release = mic_vdev_info_debug_release
386};
387
388static int mic_msi_irq_info_show(struct seq_file *s, void *pos)
389{
390 struct mic_device *mdev = s->private;
391 int reg;
392 int i, j;
393 u16 entry;
394 u16 vector;
395 struct pci_dev *pdev = container_of(mdev->sdev->parent,
396 struct pci_dev, dev);
397
398 if (pci_dev_msi_enabled(pdev)) {
399 for (i = 0; i < mdev->irq_info.num_vectors; i++) {
400 if (pdev->msix_enabled) {
401 entry = mdev->irq_info.msix_entries[i].entry;
402 vector = mdev->irq_info.msix_entries[i].vector;
403 } else {
404 entry = 0;
405 vector = pdev->irq;
406 }
407
408 reg = mdev->intr_ops->read_msi_to_src_map(mdev, entry);
409
410 seq_printf(s, "%s %-10d %s %-10d MXAR[%d]: %08X\n",
411 "IRQ:", vector, "Entry:", entry, i, reg);
412
413 seq_printf(s, "%-10s", "offset:");
414 for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
415 seq_printf(s, "%4d ", j);
416 seq_puts(s, "\n");
417
418
419 seq_printf(s, "%-10s", "count:");
420 for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
421 seq_printf(s, "%4d ",
422 (mdev->irq_info.mic_msi_map[i] &
423 BIT(j)) ? 1 : 0);
424 seq_puts(s, "\n\n");
425 }
426 } else {
427 seq_puts(s, "MSI/MSIx interrupts not enabled\n");
428 }
429
430 return 0;
431}
432
433static int mic_msi_irq_info_debug_open(struct inode *inode, struct file *file)
434{
435 return single_open(file, mic_msi_irq_info_show, inode->i_private);
436}
437
438static int
439mic_msi_irq_info_debug_release(struct inode *inode, struct file *file)
440{
441 return single_release(inode, file);
442}
443
444static const struct file_operations msi_irq_info_ops = {
445 .owner = THIS_MODULE,
446 .open = mic_msi_irq_info_debug_open,
447 .read = seq_read,
448 .llseek = seq_lseek,
449 .release = mic_msi_irq_info_debug_release
450};
451
452/**
453 * mic_create_debug_dir - Initialize MIC debugfs entries.
454 */
455void mic_create_debug_dir(struct mic_device *mdev)
456{
457 if (!mic_dbg)
458 return;
459
460 mdev->dbg_dir = debugfs_create_dir(dev_name(mdev->sdev), mic_dbg);
461 if (!mdev->dbg_dir)
462 return;
463
464 debugfs_create_file("log_buf", 0444, mdev->dbg_dir, mdev, &log_buf_ops);
465
466 debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev, &smpt_file_ops);
467
468 debugfs_create_file("soft_reset", 0444, mdev->dbg_dir, mdev,
469 &soft_reset_ops);
470
471 debugfs_create_file("post_code", 0444, mdev->dbg_dir, mdev,
472 &post_code_ops);
473
474 debugfs_create_file("dp", 0444, mdev->dbg_dir, mdev, &dp_ops);
475
476 debugfs_create_file("vdev_info", 0444, mdev->dbg_dir, mdev,
477 &vdev_info_ops);
478
479 debugfs_create_file("msi_irq_info", 0444, mdev->dbg_dir, mdev,
480 &msi_irq_info_ops);
481}
482
483/**
484 * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
485 */
486void mic_delete_debug_dir(struct mic_device *mdev)
487{
488 if (!mdev->dbg_dir)
489 return;
490
491 debugfs_remove_recursive(mdev->dbg_dir);
492}
493
494/**
495 * mic_init_debugfs - Initialize global debugfs entry.
496 */
497void __init mic_init_debugfs(void)
498{
499 mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
500 if (!mic_dbg)
501 pr_err("can't create debugfs dir\n");
502}
503
504/**
505 * mic_exit_debugfs - Uninitialize global debugfs entry
506 */
507void mic_exit_debugfs(void)
508{
509 debugfs_remove(mic_dbg);
510}