kernel/drivers/misc/mic/host/mic_debugfs.c

   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 */
  32 static 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  */
  40 static 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);
  77 done:
  78         return 0;
  79 }
  80
  81 static 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
  86 static int mic_log_buf_release(struct inode *inode, struct file *file)
  87 {
  88         return single_release(inode, file);
  89 }
  90
  91 static 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
  99 static 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
 123 static 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
 128 static int mic_smpt_debug_release(struct inode *inode, struct file *file)
 129 {
 130         return single_release(inode, file);
 131 }
 132
 133 static 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
 141 static 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
 149 static 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
 154 static int mic_soft_reset_debug_release(struct inode *inode, struct file *file)
 155 {
 156         return single_release(inode, file);
 157 }
 158
 159 static 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
 167 static 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
 176 static 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
 181 static int mic_post_code_debug_release(struct inode *inode, struct file *file)
 182 {
 183         return single_release(inode, file);
 184 }
 185
 186 static 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
 194 static 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
 218         for (i = sizeof(*bootparam); i < MIC_DP_SIZE;
 219              i += mic_total_desc_size(d)) {
 220                 d = mdev->dp + i;
 221                 dc = (void *)d + mic_aligned_desc_size(d);
 222
 223                 /* end of list */
 224                 if (d->type == 0)
 225                         break;
 226
 227                 if (d->type == -1)
 228                         continue;
 229
 230                 seq_printf(s, "Type %d ", d->type);
 231                 seq_printf(s, "Num VQ %d ", d->num_vq);
 232                 seq_printf(s, "Feature Len %d\n", d->feature_len);
 233                 seq_printf(s, "Config Len %d ", d->config_len);
 234                 seq_printf(s, "Shutdown Status %d\n", d->status);
 235
 236                 for (j = 0; j < d->num_vq; j++) {
 237                         vqconfig = mic_vq_config(d) + j;
 238                         seq_printf(s, "vqconfig[%d]: ", j);
 239                         seq_printf(s, "address 0x%llx ", vqconfig->address);
 240                         seq_printf(s, "num %d ", vqconfig->num);
 241                         seq_printf(s, "used address 0x%llx\n",
 242                                    vqconfig->used_address);
 243                 }
 244
 245                 features = (__u32 *)mic_vq_features(d);
 246                 seq_printf(s, "Features: Host 0x%x ", features[0]);
 247                 seq_printf(s, "Guest 0x%x\n", features[1]);
 248
 249                 config = mic_vq_configspace(d);
 250                 for (j = 0; j < d->config_len; j++)
 251                         seq_printf(s, "config[%d]=%d\n", j, config[j]);
 252
 253                 seq_puts(s, "Device control:\n");
 254                 seq_printf(s, "Config Change %d ", dc->config_change);
 255                 seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
 256                 seq_printf(s, "Guest Ack %d ", dc->guest_ack);
 257                 seq_printf(s, "Host ack %d\n", dc->host_ack);
 258                 seq_printf(s, "Used address updated %d ",
 259                            dc->used_address_updated);
 260                 seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
 261                 seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
 262                 seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
 263         }
 264
 265         return 0;
 266 }
 267
 268 static int mic_dp_debug_open(struct inode *inode, struct file *file)
 269 {
 270         return single_open(file, mic_dp_show, inode->i_private);
 271 }
 272
 273 static int mic_dp_debug_release(struct inode *inode, struct file *file)
 274 {
 275         return single_release(inode, file);
 276 }
 277
 278 static const struct file_operations dp_ops = {
 279         .owner   = THIS_MODULE,
 280         .open    = mic_dp_debug_open,
 281         .read    = seq_read,
 282         .llseek  = seq_lseek,
 283         .release = mic_dp_debug_release
 284 };
 285
 286 static int mic_vdev_info_show(struct seq_file *s, void *unused)
 287 {
 288         struct mic_device *mdev = s->private;
 289         struct list_head *pos, *tmp;
 290         struct mic_vdev *mvdev;
 291         int i, j;
 292
 293         mutex_lock(&mdev->mic_mutex);
 294         list_for_each_safe(pos, tmp, &mdev->vdev_list) {
 295                 mvdev = list_entry(pos, struct mic_vdev, list);
 296                 seq_printf(s, "VDEV type %d state %s in %ld out %ld\n",
 297                            mvdev->virtio_id,
 298                            mic_vdevup(mvdev) ? "UP" : "DOWN",
 299                            mvdev->in_bytes,
 300                            mvdev->out_bytes);
 301                 for (i = 0; i < MIC_MAX_VRINGS; i++) {
 302                         struct vring_desc *desc;
 303                         struct vring_avail *avail;
 304                         struct vring_used *used;
 305                         struct mic_vringh *mvr = &mvdev->mvr[i];
 306                         struct vringh *vrh = &mvr->vrh;
 307                         int num = vrh->vring.num;
 308                         if (!num)
 309                                 continue;
 310                         desc = vrh->vring.desc;
 311                         seq_printf(s, "vring i %d avail_idx %d",
 312                                    i, mvr->vring.info->avail_idx & (num - 1));
 313                         seq_printf(s, " vring i %d avail_idx %d\n",
 314                                    i, mvr->vring.info->avail_idx);
 315                         seq_printf(s, "vrh i %d weak_barriers %d",
 316                                    i, vrh->weak_barriers);
 317                         seq_printf(s, " last_avail_idx %d last_used_idx %d",
 318                                    vrh->last_avail_idx, vrh->last_used_idx);
 319                         seq_printf(s, " completed %d\n", vrh->completed);
 320                         for (j = 0; j < num; j++) {
 321                                 seq_printf(s, "desc[%d] addr 0x%llx len %d",
 322                                            j, desc->addr, desc->len);
 323                                 seq_printf(s, " flags 0x%x next %d\n",
 324                                            desc->flags, desc->next);
 325                                 desc++;
 326                         }
 327                         avail = vrh->vring.avail;
 328                         seq_printf(s, "avail flags 0x%x idx %d\n",
 329                                    vringh16_to_cpu(vrh, avail->flags),
 330                                    vringh16_to_cpu(vrh, avail->idx) & (num - 1));
 331                         seq_printf(s, "avail flags 0x%x idx %d\n",
 332                                    vringh16_to_cpu(vrh, avail->flags),
 333                                    vringh16_to_cpu(vrh, avail->idx));
 334                         for (j = 0; j < num; j++)
 335                                 seq_printf(s, "avail ring[%d] %d\n",
 336                                            j, avail->ring[j]);
 337                         used = vrh->vring.used;
 338                         seq_printf(s, "used flags 0x%x idx %d\n",
 339                                    vringh16_to_cpu(vrh, used->flags),
 340                                    vringh16_to_cpu(vrh, used->idx) & (num - 1));
 341                         seq_printf(s, "used flags 0x%x idx %d\n",
 342                                    vringh16_to_cpu(vrh, used->flags),
 343                                    vringh16_to_cpu(vrh, used->idx));
 344                         for (j = 0; j < num; j++)
 345                                 seq_printf(s, "used ring[%d] id %d len %d\n",
 346                                            j, vringh32_to_cpu(vrh,
 347                                                               used->ring[j].id),
 348                                            vringh32_to_cpu(vrh,
 349                                                            used->ring[j].len));
 350                 }
 351         }
 352         mutex_unlock(&mdev->mic_mutex);
 353
 354         return 0;
 355 }
 356
 357 static int mic_vdev_info_debug_open(struct inode *inode, struct file *file)
 358 {
 359         return single_open(file, mic_vdev_info_show, inode->i_private);
 360 }
 361
 362 static int mic_vdev_info_debug_release(struct inode *inode, struct file *file)
 363 {
 364         return single_release(inode, file);
 365 }
 366
 367 static const struct file_operations vdev_info_ops = {
 368         .owner   = THIS_MODULE,
 369         .open    = mic_vdev_info_debug_open,
 370         .read    = seq_read,
 371         .llseek  = seq_lseek,
 372         .release = mic_vdev_info_debug_release
 373 };
 374
 375 static int mic_msi_irq_info_show(struct seq_file *s, void *pos)
 376 {
 377         struct mic_device *mdev  = s->private;
 378         int reg;
 379         int i, j;
 380         u16 entry;
 381         u16 vector;
 382         struct pci_dev *pdev = container_of(mdev->sdev->parent,
 383                 struct pci_dev, dev);
 384
 385         if (pci_dev_msi_enabled(pdev)) {
 386                 for (i = 0; i < mdev->irq_info.num_vectors; i++) {
 387                         if (pdev->msix_enabled) {
 388                                 entry = mdev->irq_info.msix_entries[i].entry;
 389                                 vector = mdev->irq_info.msix_entries[i].vector;
 390                         } else {
 391                                 entry = 0;
 392                                 vector = pdev->irq;
 393                         }
 394
 395                         reg = mdev->intr_ops->read_msi_to_src_map(mdev, entry);
 396
 397                         seq_printf(s, "%s %-10d %s %-10d MXAR[%d]: %08X\n",
 398                                    "IRQ:", vector, "Entry:", entry, i, reg);
 399
 400                         seq_printf(s, "%-10s", "offset:");
 401                         for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
 402                                 seq_printf(s, "%4d ", j);
 403                         seq_puts(s, "\n");
 404
 405
 406                         seq_printf(s, "%-10s", "count:");
 407                         for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
 408                                 seq_printf(s, "%4d ",
 409                                            (mdev->irq_info.mic_msi_map[i] &
 410                                            BIT(j)) ? 1 : 0);
 411                         seq_puts(s, "\n\n");
 412                 }
 413         } else {
 414                 seq_puts(s, "MSI/MSIx interrupts not enabled\n");
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int mic_msi_irq_info_debug_open(struct inode *inode, struct file *file)
 421 {
 422         return single_open(file, mic_msi_irq_info_show, inode->i_private);
 423 }
 424
 425 static int
 426 mic_msi_irq_info_debug_release(struct inode *inode, struct file *file)
 427 {
 428         return single_release(inode, file);
 429 }
 430
 431 static const struct file_operations msi_irq_info_ops = {
 432         .owner   = THIS_MODULE,
 433         .open    = mic_msi_irq_info_debug_open,
 434         .read    = seq_read,
 435         .llseek  = seq_lseek,
 436         .release = mic_msi_irq_info_debug_release
 437 };
 438
 439 /**
 440  * mic_create_debug_dir - Initialize MIC debugfs entries.
 441  */
 442 void mic_create_debug_dir(struct mic_device *mdev)
 443 {
 444         if (!mic_dbg)
 445                 return;
 446
 447         mdev->dbg_dir = debugfs_create_dir(dev_name(mdev->sdev), mic_dbg);
 448         if (!mdev->dbg_dir)
 449                 return;
 450
 451         debugfs_create_file("log_buf", 0444, mdev->dbg_dir, mdev, &log_buf_ops);
 452
 453         debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev, &smpt_file_ops);
 454
 455         debugfs_create_file("soft_reset", 0444, mdev->dbg_dir, mdev,
 456                             &soft_reset_ops);
 457
 458         debugfs_create_file("post_code", 0444, mdev->dbg_dir, mdev,
 459                             &post_code_ops);
 460
 461         debugfs_create_file("dp", 0444, mdev->dbg_dir, mdev, &dp_ops);
 462
 463         debugfs_create_file("vdev_info", 0444, mdev->dbg_dir, mdev,
 464                             &vdev_info_ops);
 465
 466         debugfs_create_file("msi_irq_info", 0444, mdev->dbg_dir, mdev,
 467                             &msi_irq_info_ops);
 468 }
 469
 470 /**
 471  * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
 472  */
 473 void mic_delete_debug_dir(struct mic_device *mdev)
 474 {
 475         if (!mdev->dbg_dir)
 476                 return;
 477
 478         debugfs_remove_recursive(mdev->dbg_dir);
 479 }
 480
 481 /**
 482  * mic_init_debugfs - Initialize global debugfs entry.
 483  */
 484 void __init mic_init_debugfs(void)
 485 {
 486         mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
 487         if (!mic_dbg)
 488                 pr_err("can't create debugfs dir\n");
 489 }
 490
 491 /**
 492  * mic_exit_debugfs - Uninitialize global debugfs entry
 493  */
 494 void mic_exit_debugfs(void)
 495 {
 496         debugfs_remove(mic_dbg);
 497 }