drivers/vdpa/pds/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright(c) 2023 Advanced Micro Devices, Inc */
   3
   4 #include <linux/pci.h>
   5 #include <linux/vdpa.h>
   6
   7 #include <linux/pds/pds_common.h>
   8 #include <linux/pds/pds_core_if.h>
   9 #include <linux/pds/pds_adminq.h>
  10 #include <linux/pds/pds_auxbus.h>
  11
  12 #include "aux_drv.h"
  13 #include "vdpa_dev.h"
  14 #include "debugfs.h"
  15
  16 static struct dentry *dbfs_dir;
  17
  18 void pds_vdpa_debugfs_create(void)
  19 {
  20         dbfs_dir = debugfs_create_dir(PDS_VDPA_DRV_NAME, NULL);
  21 }
  22
  23 void pds_vdpa_debugfs_destroy(void)
  24 {
  25         debugfs_remove_recursive(dbfs_dir);
  26         dbfs_dir = NULL;
  27 }
  28
  29 #define PRINT_SBIT_NAME(__seq, __f, __name)                     \
  30         do {                                                    \
  31                 if ((__f) & (__name))                               \
  32                         seq_printf(__seq, " %s", &#__name[16]); \
  33         } while (0)
  34
  35 static void print_status_bits(struct seq_file *seq, u8 status)
  36 {
  37         seq_puts(seq, "status:");
  38         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_ACKNOWLEDGE);
  39         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER);
  40         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER_OK);
  41         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FEATURES_OK);
  42         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_NEEDS_RESET);
  43         PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FAILED);
  44         seq_puts(seq, "\n");
  45 }
  46
  47 static void print_feature_bits_all(struct seq_file *seq, u64 features)
  48 {
  49         int i;
  50
  51         seq_puts(seq, "features:");
  52
  53         for (i = 0; i < (sizeof(u64) * 8); i++) {
  54                 u64 mask = BIT_ULL(i);
  55
  56                 switch (features & mask) {
  57                 case BIT_ULL(VIRTIO_NET_F_CSUM):
  58                         seq_puts(seq, " VIRTIO_NET_F_CSUM");
  59                         break;
  60                 case BIT_ULL(VIRTIO_NET_F_GUEST_CSUM):
  61                         seq_puts(seq, " VIRTIO_NET_F_GUEST_CSUM");
  62                         break;
  63                 case BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS):
  64                         seq_puts(seq, " VIRTIO_NET_F_CTRL_GUEST_OFFLOADS");
  65                         break;
  66                 case BIT_ULL(VIRTIO_NET_F_MTU):
  67                         seq_puts(seq, " VIRTIO_NET_F_MTU");
  68                         break;
  69                 case BIT_ULL(VIRTIO_NET_F_MAC):
  70                         seq_puts(seq, " VIRTIO_NET_F_MAC");
  71                         break;
  72                 case BIT_ULL(VIRTIO_NET_F_GUEST_TSO4):
  73                         seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO4");
  74                         break;
  75                 case BIT_ULL(VIRTIO_NET_F_GUEST_TSO6):
  76                         seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO6");
  77                         break;
  78                 case BIT_ULL(VIRTIO_NET_F_GUEST_ECN):
  79                         seq_puts(seq, " VIRTIO_NET_F_GUEST_ECN");
  80                         break;
  81                 case BIT_ULL(VIRTIO_NET_F_GUEST_UFO):
  82                         seq_puts(seq, " VIRTIO_NET_F_GUEST_UFO");
  83                         break;
  84                 case BIT_ULL(VIRTIO_NET_F_HOST_TSO4):
  85                         seq_puts(seq, " VIRTIO_NET_F_HOST_TSO4");
  86                         break;
  87                 case BIT_ULL(VIRTIO_NET_F_HOST_TSO6):
  88                         seq_puts(seq, " VIRTIO_NET_F_HOST_TSO6");
  89                         break;
  90                 case BIT_ULL(VIRTIO_NET_F_HOST_ECN):
  91                         seq_puts(seq, " VIRTIO_NET_F_HOST_ECN");
  92                         break;
  93                 case BIT_ULL(VIRTIO_NET_F_HOST_UFO):
  94                         seq_puts(seq, " VIRTIO_NET_F_HOST_UFO");
  95                         break;
  96                 case BIT_ULL(VIRTIO_NET_F_MRG_RXBUF):
  97                         seq_puts(seq, " VIRTIO_NET_F_MRG_RXBUF");
  98                         break;
  99                 case BIT_ULL(VIRTIO_NET_F_STATUS):
 100                         seq_puts(seq, " VIRTIO_NET_F_STATUS");
 101                         break;
 102                 case BIT_ULL(VIRTIO_NET_F_CTRL_VQ):
 103                         seq_puts(seq, " VIRTIO_NET_F_CTRL_VQ");
 104                         break;
 105                 case BIT_ULL(VIRTIO_NET_F_CTRL_RX):
 106                         seq_puts(seq, " VIRTIO_NET_F_CTRL_RX");
 107                         break;
 108                 case BIT_ULL(VIRTIO_NET_F_CTRL_VLAN):
 109                         seq_puts(seq, " VIRTIO_NET_F_CTRL_VLAN");
 110                         break;
 111                 case BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA):
 112                         seq_puts(seq, " VIRTIO_NET_F_CTRL_RX_EXTRA");
 113                         break;
 114                 case BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE):
 115                         seq_puts(seq, " VIRTIO_NET_F_GUEST_ANNOUNCE");
 116                         break;
 117                 case BIT_ULL(VIRTIO_NET_F_MQ):
 118                         seq_puts(seq, " VIRTIO_NET_F_MQ");
 119                         break;
 120                 case BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR):
 121                         seq_puts(seq, " VIRTIO_NET_F_CTRL_MAC_ADDR");
 122                         break;
 123                 case BIT_ULL(VIRTIO_NET_F_HASH_REPORT):
 124                         seq_puts(seq, " VIRTIO_NET_F_HASH_REPORT");
 125                         break;
 126                 case BIT_ULL(VIRTIO_NET_F_RSS):
 127                         seq_puts(seq, " VIRTIO_NET_F_RSS");
 128                         break;
 129                 case BIT_ULL(VIRTIO_NET_F_RSC_EXT):
 130                         seq_puts(seq, " VIRTIO_NET_F_RSC_EXT");
 131                         break;
 132                 case BIT_ULL(VIRTIO_NET_F_STANDBY):
 133                         seq_puts(seq, " VIRTIO_NET_F_STANDBY");
 134                         break;
 135                 case BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX):
 136                         seq_puts(seq, " VIRTIO_NET_F_SPEED_DUPLEX");
 137                         break;
 138                 case BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY):
 139                         seq_puts(seq, " VIRTIO_F_NOTIFY_ON_EMPTY");
 140                         break;
 141                 case BIT_ULL(VIRTIO_F_ANY_LAYOUT):
 142                         seq_puts(seq, " VIRTIO_F_ANY_LAYOUT");
 143                         break;
 144                 case BIT_ULL(VIRTIO_F_VERSION_1):
 145                         seq_puts(seq, " VIRTIO_F_VERSION_1");
 146                         break;
 147                 case BIT_ULL(VIRTIO_F_ACCESS_PLATFORM):
 148                         seq_puts(seq, " VIRTIO_F_ACCESS_PLATFORM");
 149                         break;
 150                 case BIT_ULL(VIRTIO_F_RING_PACKED):
 151                         seq_puts(seq, " VIRTIO_F_RING_PACKED");
 152                         break;
 153                 case BIT_ULL(VIRTIO_F_ORDER_PLATFORM):
 154                         seq_puts(seq, " VIRTIO_F_ORDER_PLATFORM");
 155                         break;
 156                 case BIT_ULL(VIRTIO_F_SR_IOV):
 157                         seq_puts(seq, " VIRTIO_F_SR_IOV");
 158                         break;
 159                 case 0:
 160                         break;
 161                 default:
 162                         seq_printf(seq, " bit_%d", i);
 163                         break;
 164                 }
 165         }
 166
 167         seq_puts(seq, "\n");
 168 }
 169
 170 void pds_vdpa_debugfs_add_pcidev(struct pds_vdpa_aux *vdpa_aux)
 171 {
 172         vdpa_aux->dentry = debugfs_create_dir(pci_name(vdpa_aux->padev->vf_pdev), dbfs_dir);
 173 }
 174
 175 static int identity_show(struct seq_file *seq, void *v)
 176 {
 177         struct pds_vdpa_aux *vdpa_aux = seq->private;
 178         struct vdpa_mgmt_dev *mgmt;
 179         u64 hw_features;
 180
 181         seq_printf(seq, "aux_dev:            %s\n",
 182                    dev_name(&vdpa_aux->padev->aux_dev.dev));
 183
 184         mgmt = &vdpa_aux->vdpa_mdev;
 185         seq_printf(seq, "max_vqs:            %d\n", mgmt->max_supported_vqs);
 186         seq_printf(seq, "config_attr_mask:   %#llx\n", mgmt->config_attr_mask);
 187         hw_features = le64_to_cpu(vdpa_aux->ident.hw_features);
 188         seq_printf(seq, "hw_features:        %#llx\n", hw_features);
 189         print_feature_bits_all(seq, hw_features);
 190
 191         return 0;
 192 }
 193 DEFINE_SHOW_ATTRIBUTE(identity);
 194
 195 void pds_vdpa_debugfs_add_ident(struct pds_vdpa_aux *vdpa_aux)
 196 {
 197         debugfs_create_file("identity", 0400, vdpa_aux->dentry,
 198                             vdpa_aux, &identity_fops);
 199 }
 200
 201 static int config_show(struct seq_file *seq, void *v)
 202 {
 203         struct pds_vdpa_device *pdsv = seq->private;
 204         struct virtio_net_config vc;
 205         u8 status;
 206
 207         memcpy_fromio(&vc, pdsv->vdpa_aux->vd_mdev.device,
 208                       sizeof(struct virtio_net_config));
 209
 210         seq_printf(seq, "mac:                  %pM\n", vc.mac);
 211         seq_printf(seq, "max_virtqueue_pairs:  %d\n",
 212                    __virtio16_to_cpu(true, vc.max_virtqueue_pairs));
 213         seq_printf(seq, "mtu:                  %d\n", __virtio16_to_cpu(true, vc.mtu));
 214         seq_printf(seq, "speed:                %d\n", le32_to_cpu(vc.speed));
 215         seq_printf(seq, "duplex:               %d\n", vc.duplex);
 216         seq_printf(seq, "rss_max_key_size:     %d\n", vc.rss_max_key_size);
 217         seq_printf(seq, "rss_max_indirection_table_length: %d\n",
 218                    le16_to_cpu(vc.rss_max_indirection_table_length));
 219         seq_printf(seq, "supported_hash_types: %#x\n",
 220                    le32_to_cpu(vc.supported_hash_types));
 221         seq_printf(seq, "vn_status:            %#x\n",
 222                    __virtio16_to_cpu(true, vc.status));
 223
 224         status = vp_modern_get_status(&pdsv->vdpa_aux->vd_mdev);
 225         seq_printf(seq, "dev_status:           %#x\n", status);
 226         print_status_bits(seq, status);
 227         seq_printf(seq, "negotiated_features:  %#llx\n", pdsv->negotiated_features);
 228         print_feature_bits_all(seq, pdsv->negotiated_features);
 229         seq_printf(seq, "vdpa_index:           %d\n", pdsv->vdpa_index);
 230         seq_printf(seq, "num_vqs:              %d\n", pdsv->num_vqs);
 231
 232         return 0;
 233 }
 234 DEFINE_SHOW_ATTRIBUTE(config);
 235
 236 static int vq_show(struct seq_file *seq, void *v)
 237 {
 238         struct pds_vdpa_vq_info *vq = seq->private;
 239
 240         seq_printf(seq, "ready:      %d\n", vq->ready);
 241         seq_printf(seq, "desc_addr:  %#llx\n", vq->desc_addr);
 242         seq_printf(seq, "avail_addr: %#llx\n", vq->avail_addr);
 243         seq_printf(seq, "used_addr:  %#llx\n", vq->used_addr);
 244         seq_printf(seq, "q_len:      %d\n", vq->q_len);
 245         seq_printf(seq, "qid:        %d\n", vq->qid);
 246
 247         seq_printf(seq, "doorbell:   %#llx\n", vq->doorbell);
 248         seq_printf(seq, "avail_idx:  %d\n", vq->avail_idx);
 249         seq_printf(seq, "used_idx:   %d\n", vq->used_idx);
 250         seq_printf(seq, "irq:        %d\n", vq->irq);
 251         seq_printf(seq, "irq-name:   %s\n", vq->irq_name);
 252
 253         return 0;
 254 }
 255 DEFINE_SHOW_ATTRIBUTE(vq);
 256
 257 void pds_vdpa_debugfs_add_vdpadev(struct pds_vdpa_aux *vdpa_aux)
 258 {
 259         int i;
 260
 261         debugfs_create_file("config", 0400, vdpa_aux->dentry, vdpa_aux->pdsv, &config_fops);
 262
 263         for (i = 0; i < vdpa_aux->pdsv->num_vqs; i++) {
 264                 char name[16];
 265
 266                 snprintf(name, sizeof(name), "vq%02d", i);
 267                 debugfs_create_file(name, 0400, vdpa_aux->dentry,
 268                                     &vdpa_aux->pdsv->vqs[i], &vq_fops);
 269         }
 270 }
 271
 272 void pds_vdpa_debugfs_del_vdpadev(struct pds_vdpa_aux *vdpa_aux)
 273 {
 274         debugfs_remove_recursive(vdpa_aux->dentry);
 275         vdpa_aux->dentry = NULL;
 276 }
 277
 278 void pds_vdpa_debugfs_reset_vdpadev(struct pds_vdpa_aux *vdpa_aux)
 279 {
 280         /* we don't keep track of the entries, so remove it all
 281          * then rebuild the basics
 282          */
 283         pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
 284         pds_vdpa_debugfs_add_pcidev(vdpa_aux);
 285         pds_vdpa_debugfs_add_ident(vdpa_aux);
 286 }