drivers/misc/mic/vop/vop_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel MIC Platform Software Stack (MPSS)
   4  *
   5  * Copyright(c) 2016 Intel Corporation.
   6  *
   7  * Intel Virtio Over PCIe (VOP) driver.
   8  */
   9 #include <linux/debugfs.h>
  10 #include <linux/seq_file.h>
  11
  12 #include "vop_main.h"
  13
  14 static int vop_dp_show(struct seq_file *s, void *pos)
  15 {
  16         struct mic_device_desc *d;
  17         struct mic_device_ctrl *dc;
  18         struct mic_vqconfig *vqconfig;
  19         __u32 *features;
  20         __u8 *config;
  21         struct vop_info *vi = s->private;
  22         struct vop_device *vpdev = vi->vpdev;
  23         struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
  24         int j, k;
  25
  26         seq_printf(s, "Bootparam: magic 0x%x\n",
  27                    bootparam->magic);
  28         seq_printf(s, "Bootparam: h2c_config_db %d\n",
  29                    bootparam->h2c_config_db);
  30         seq_printf(s, "Bootparam: node_id %d\n",
  31                    bootparam->node_id);
  32         seq_printf(s, "Bootparam: c2h_scif_db %d\n",
  33                    bootparam->c2h_scif_db);
  34         seq_printf(s, "Bootparam: h2c_scif_db %d\n",
  35                    bootparam->h2c_scif_db);
  36         seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n",
  37                    bootparam->scif_host_dma_addr);
  38         seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n",
  39                    bootparam->scif_card_dma_addr);
  40
  41         for (j = sizeof(*bootparam);
  42                 j < MIC_DP_SIZE; j += mic_total_desc_size(d)) {
  43                 d = (void *)bootparam + j;
  44                 dc = (void *)d + mic_aligned_desc_size(d);
  45
  46                 /* end of list */
  47                 if (d->type == 0)
  48                         break;
  49
  50                 if (d->type == -1)
  51                         continue;
  52
  53                 seq_printf(s, "Type %d ", d->type);
  54                 seq_printf(s, "Num VQ %d ", d->num_vq);
  55                 seq_printf(s, "Feature Len %d\n", d->feature_len);
  56                 seq_printf(s, "Config Len %d ", d->config_len);
  57                 seq_printf(s, "Shutdown Status %d\n", d->status);
  58
  59                 for (k = 0; k < d->num_vq; k++) {
  60                         vqconfig = mic_vq_config(d) + k;
  61                         seq_printf(s, "vqconfig[%d]: ", k);
  62                         seq_printf(s, "address 0x%llx ",
  63                                    vqconfig->address);
  64                         seq_printf(s, "num %d ", vqconfig->num);
  65                         seq_printf(s, "used address 0x%llx\n",
  66                                    vqconfig->used_address);
  67                 }
  68
  69                 features = (__u32 *)mic_vq_features(d);
  70                 seq_printf(s, "Features: Host 0x%x ", features[0]);
  71                 seq_printf(s, "Guest 0x%x\n", features[1]);
  72
  73                 config = mic_vq_configspace(d);
  74                 for (k = 0; k < d->config_len; k++)
  75                         seq_printf(s, "config[%d]=%d\n", k, config[k]);
  76
  77                 seq_puts(s, "Device control:\n");
  78                 seq_printf(s, "Config Change %d ", dc->config_change);
  79                 seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
  80                 seq_printf(s, "Guest Ack %d ", dc->guest_ack);
  81                 seq_printf(s, "Host ack %d\n", dc->host_ack);
  82                 seq_printf(s, "Used address updated %d ",
  83                            dc->used_address_updated);
  84                 seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
  85                 seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
  86                 seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
  87         }
  88         schedule_work(&vi->hotplug_work);
  89         return 0;
  90 }
  91
  92 DEFINE_SHOW_ATTRIBUTE(vop_dp);
  93
  94 static int vop_vdev_info_show(struct seq_file *s, void *unused)
  95 {
  96         struct vop_info *vi = s->private;
  97         struct list_head *pos, *tmp;
  98         struct vop_vdev *vdev;
  99         int i, j;
 100
 101         mutex_lock(&vi->vop_mutex);
 102         list_for_each_safe(pos, tmp, &vi->vdev_list) {
 103                 vdev = list_entry(pos, struct vop_vdev, list);
 104                 seq_printf(s, "VDEV type %d state %s in %ld out %ld in_dma %ld out_dma %ld\n",
 105                            vdev->virtio_id,
 106                            vop_vdevup(vdev) ? "UP" : "DOWN",
 107                            vdev->in_bytes,
 108                            vdev->out_bytes,
 109                            vdev->in_bytes_dma,
 110                            vdev->out_bytes_dma);
 111                 for (i = 0; i < MIC_MAX_VRINGS; i++) {
 112                         struct vring_desc *desc;
 113                         struct vring_avail *avail;
 114                         struct vring_used *used;
 115                         struct vop_vringh *vvr = &vdev->vvr[i];
 116                         struct vringh *vrh = &vvr->vrh;
 117                         int num = vrh->vring.num;
 118
 119                         if (!num)
 120                                 continue;
 121                         desc = vrh->vring.desc;
 122                         seq_printf(s, "vring i %d avail_idx %d",
 123                                    i, vvr->vring.info->avail_idx & (num - 1));
 124                         seq_printf(s, " vring i %d avail_idx %d\n",
 125                                    i, vvr->vring.info->avail_idx);
 126                         seq_printf(s, "vrh i %d weak_barriers %d",
 127                                    i, vrh->weak_barriers);
 128                         seq_printf(s, " last_avail_idx %d last_used_idx %d",
 129                                    vrh->last_avail_idx, vrh->last_used_idx);
 130                         seq_printf(s, " completed %d\n", vrh->completed);
 131                         for (j = 0; j < num; j++) {
 132                                 seq_printf(s, "desc[%d] addr 0x%llx len %d",
 133                                            j, desc->addr, desc->len);
 134                                 seq_printf(s, " flags 0x%x next %d\n",
 135                                            desc->flags, desc->next);
 136                                 desc++;
 137                         }
 138                         avail = vrh->vring.avail;
 139                         seq_printf(s, "avail flags 0x%x idx %d\n",
 140                                    vringh16_to_cpu(vrh, avail->flags),
 141                                    vringh16_to_cpu(vrh,
 142                                                    avail->idx) & (num - 1));
 143                         seq_printf(s, "avail flags 0x%x idx %d\n",
 144                                    vringh16_to_cpu(vrh, avail->flags),
 145                                    vringh16_to_cpu(vrh, avail->idx));
 146                         for (j = 0; j < num; j++)
 147                                 seq_printf(s, "avail ring[%d] %d\n",
 148                                            j, avail->ring[j]);
 149                         used = vrh->vring.used;
 150                         seq_printf(s, "used flags 0x%x idx %d\n",
 151                                    vringh16_to_cpu(vrh, used->flags),
 152                                    vringh16_to_cpu(vrh, used->idx) & (num - 1));
 153                         seq_printf(s, "used flags 0x%x idx %d\n",
 154                                    vringh16_to_cpu(vrh, used->flags),
 155                                    vringh16_to_cpu(vrh, used->idx));
 156                         for (j = 0; j < num; j++)
 157                                 seq_printf(s, "used ring[%d] id %d len %d\n",
 158                                            j, vringh32_to_cpu(vrh,
 159                                                               used->ring[j].id),
 160                                            vringh32_to_cpu(vrh,
 161                                                            used->ring[j].len));
 162                 }
 163         }
 164         mutex_unlock(&vi->vop_mutex);
 165
 166         return 0;
 167 }
 168
 169 DEFINE_SHOW_ATTRIBUTE(vop_vdev_info);
 170
 171 void vop_init_debugfs(struct vop_info *vi)
 172 {
 173         char name[16];
 174
 175         snprintf(name, sizeof(name), "%s%d", KBUILD_MODNAME, vi->vpdev->dnode);
 176         vi->dbg = debugfs_create_dir(name, NULL);
 177         debugfs_create_file("dp", 0444, vi->dbg, vi, &vop_dp_fops);
 178         debugfs_create_file("vdev_info", 0444, vi->dbg, vi, &vop_vdev_info_fops);
 179 }
 180
 181 void vop_exit_debugfs(struct vop_info *vi)
 182 {
 183         debugfs_remove_recursive(vi->dbg);
 184 }