drivers/misc/mic/vop/vop_debugfs.c

   1 /*
   2  * Intel MIC Platform Software Stack (MPSS)
   3  *
   4  * Copyright(c) 2016 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 Virtio Over PCIe (VOP) driver.
  19  *
  20  */
  21 #include <linux/debugfs.h>
  22 #include <linux/seq_file.h>
  23
  24 #include "vop_main.h"
  25
  26 static int vop_dp_show(struct seq_file *s, void *pos)
  27 {
  28         struct mic_device_desc *d;
  29         struct mic_device_ctrl *dc;
  30         struct mic_vqconfig *vqconfig;
  31         __u32 *features;
  32         __u8 *config;
  33         struct vop_info *vi = s->private;
  34         struct vop_device *vpdev = vi->vpdev;
  35         struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
  36         int j, k;
  37
  38         seq_printf(s, "Bootparam: magic 0x%x\n",
  39                    bootparam->magic);
  40         seq_printf(s, "Bootparam: h2c_config_db %d\n",
  41                    bootparam->h2c_config_db);
  42         seq_printf(s, "Bootparam: node_id %d\n",
  43                    bootparam->node_id);
  44         seq_printf(s, "Bootparam: c2h_scif_db %d\n",
  45                    bootparam->c2h_scif_db);
  46         seq_printf(s, "Bootparam: h2c_scif_db %d\n",
  47                    bootparam->h2c_scif_db);
  48         seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n",
  49                    bootparam->scif_host_dma_addr);
  50         seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n",
  51                    bootparam->scif_card_dma_addr);
  52
  53         for (j = sizeof(*bootparam);
  54                 j < MIC_DP_SIZE; j += mic_total_desc_size(d)) {
  55                 d = (void *)bootparam + j;
  56                 dc = (void *)d + mic_aligned_desc_size(d);
  57
  58                 /* end of list */
  59                 if (d->type == 0)
  60                         break;
  61
  62                 if (d->type == -1)
  63                         continue;
  64
  65                 seq_printf(s, "Type %d ", d->type);
  66                 seq_printf(s, "Num VQ %d ", d->num_vq);
  67                 seq_printf(s, "Feature Len %d\n", d->feature_len);
  68                 seq_printf(s, "Config Len %d ", d->config_len);
  69                 seq_printf(s, "Shutdown Status %d\n", d->status);
  70
  71                 for (k = 0; k < d->num_vq; k++) {
  72                         vqconfig = mic_vq_config(d) + k;
  73                         seq_printf(s, "vqconfig[%d]: ", k);
  74                         seq_printf(s, "address 0x%llx ",
  75                                    vqconfig->address);
  76                         seq_printf(s, "num %d ", vqconfig->num);
  77                         seq_printf(s, "used address 0x%llx\n",
  78                                    vqconfig->used_address);
  79                 }
  80
  81                 features = (__u32 *)mic_vq_features(d);
  82                 seq_printf(s, "Features: Host 0x%x ", features[0]);
  83                 seq_printf(s, "Guest 0x%x\n", features[1]);
  84
  85                 config = mic_vq_configspace(d);
  86                 for (k = 0; k < d->config_len; k++)
  87                         seq_printf(s, "config[%d]=%d\n", k, config[k]);
  88
  89                 seq_puts(s, "Device control:\n");
  90                 seq_printf(s, "Config Change %d ", dc->config_change);
  91                 seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
  92                 seq_printf(s, "Guest Ack %d ", dc->guest_ack);
  93                 seq_printf(s, "Host ack %d\n", dc->host_ack);
  94                 seq_printf(s, "Used address updated %d ",
  95                            dc->used_address_updated);
  96                 seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
  97                 seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
  98                 seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
  99         }
 100         schedule_work(&vi->hotplug_work);
 101         return 0;
 102 }
 103
 104 static int vop_dp_debug_open(struct inode *inode, struct file *file)
 105 {
 106         return single_open(file, vop_dp_show, inode->i_private);
 107 }
 108
 109 static int vop_dp_debug_release(struct inode *inode, struct file *file)
 110 {
 111         return single_release(inode, file);
 112 }
 113
 114 static const struct file_operations dp_ops = {
 115         .owner   = THIS_MODULE,
 116         .open    = vop_dp_debug_open,
 117         .read    = seq_read,
 118         .llseek  = seq_lseek,
 119         .release = vop_dp_debug_release
 120 };
 121
 122 static int vop_vdev_info_show(struct seq_file *s, void *unused)
 123 {
 124         struct vop_info *vi = s->private;
 125         struct list_head *pos, *tmp;
 126         struct vop_vdev *vdev;
 127         int i, j;
 128
 129         mutex_lock(&vi->vop_mutex);
 130         list_for_each_safe(pos, tmp, &vi->vdev_list) {
 131                 vdev = list_entry(pos, struct vop_vdev, list);
 132                 seq_printf(s, "VDEV type %d state %s in %ld out %ld in_dma %ld out_dma %ld\n",
 133                            vdev->virtio_id,
 134                            vop_vdevup(vdev) ? "UP" : "DOWN",
 135                            vdev->in_bytes,
 136                            vdev->out_bytes,
 137                            vdev->in_bytes_dma,
 138                            vdev->out_bytes_dma);
 139                 for (i = 0; i < MIC_MAX_VRINGS; i++) {
 140                         struct vring_desc *desc;
 141                         struct vring_avail *avail;
 142                         struct vring_used *used;
 143                         struct vop_vringh *vvr = &vdev->vvr[i];
 144                         struct vringh *vrh = &vvr->vrh;
 145                         int num = vrh->vring.num;
 146
 147                         if (!num)
 148                                 continue;
 149                         desc = vrh->vring.desc;
 150                         seq_printf(s, "vring i %d avail_idx %d",
 151                                    i, vvr->vring.info->avail_idx & (num - 1));
 152                         seq_printf(s, " vring i %d avail_idx %d\n",
 153                                    i, vvr->vring.info->avail_idx);
 154                         seq_printf(s, "vrh i %d weak_barriers %d",
 155                                    i, vrh->weak_barriers);
 156                         seq_printf(s, " last_avail_idx %d last_used_idx %d",
 157                                    vrh->last_avail_idx, vrh->last_used_idx);
 158                         seq_printf(s, " completed %d\n", vrh->completed);
 159                         for (j = 0; j < num; j++) {
 160                                 seq_printf(s, "desc[%d] addr 0x%llx len %d",
 161                                            j, desc->addr, desc->len);
 162                                 seq_printf(s, " flags 0x%x next %d\n",
 163                                            desc->flags, desc->next);
 164                                 desc++;
 165                         }
 166                         avail = vrh->vring.avail;
 167                         seq_printf(s, "avail flags 0x%x idx %d\n",
 168                                    vringh16_to_cpu(vrh, avail->flags),
 169                                    vringh16_to_cpu(vrh,
 170                                                    avail->idx) & (num - 1));
 171                         seq_printf(s, "avail flags 0x%x idx %d\n",
 172                                    vringh16_to_cpu(vrh, avail->flags),
 173                                    vringh16_to_cpu(vrh, avail->idx));
 174                         for (j = 0; j < num; j++)
 175                                 seq_printf(s, "avail ring[%d] %d\n",
 176                                            j, avail->ring[j]);
 177                         used = vrh->vring.used;
 178                         seq_printf(s, "used flags 0x%x idx %d\n",
 179                                    vringh16_to_cpu(vrh, used->flags),
 180                                    vringh16_to_cpu(vrh, used->idx) & (num - 1));
 181                         seq_printf(s, "used flags 0x%x idx %d\n",
 182                                    vringh16_to_cpu(vrh, used->flags),
 183                                    vringh16_to_cpu(vrh, used->idx));
 184                         for (j = 0; j < num; j++)
 185                                 seq_printf(s, "used ring[%d] id %d len %d\n",
 186                                            j, vringh32_to_cpu(vrh,
 187                                                               used->ring[j].id),
 188                                            vringh32_to_cpu(vrh,
 189                                                            used->ring[j].len));
 190                 }
 191         }
 192         mutex_unlock(&vi->vop_mutex);
 193
 194         return 0;
 195 }
 196
 197 static int vop_vdev_info_debug_open(struct inode *inode, struct file *file)
 198 {
 199         return single_open(file, vop_vdev_info_show, inode->i_private);
 200 }
 201
 202 static int vop_vdev_info_debug_release(struct inode *inode, struct file *file)
 203 {
 204         return single_release(inode, file);
 205 }
 206
 207 static const struct file_operations vdev_info_ops = {
 208         .owner   = THIS_MODULE,
 209         .open    = vop_vdev_info_debug_open,
 210         .read    = seq_read,
 211         .llseek  = seq_lseek,
 212         .release = vop_vdev_info_debug_release
 213 };
 214
 215 void vop_init_debugfs(struct vop_info *vi)
 216 {
 217         char name[16];
 218
 219         snprintf(name, sizeof(name), "%s%d", KBUILD_MODNAME, vi->vpdev->dnode);
 220         vi->dbg = debugfs_create_dir(name, NULL);
 221         if (!vi->dbg) {
 222                 pr_err("can't create debugfs dir vop\n");
 223                 return;
 224         }
 225         debugfs_create_file("dp", 0444, vi->dbg, vi, &dp_ops);
 226         debugfs_create_file("vdev_info", 0444, vi->dbg, vi, &vdev_info_ops);
 227 }
 228
 229 void vop_exit_debugfs(struct vop_info *vi)
 230 {
 231         debugfs_remove_recursive(vi->dbg);
 232 }