drivers/lightnvm/sysfs.c

   1 #include <linux/kernel.h>
   2 #include <linux/lightnvm.h>
   3 #include <linux/miscdevice.h>
   4 #include <linux/kobject.h>
   5 #include <linux/blk-mq.h>
   6
   7 #include "lightnvm.h"
   8
   9 static ssize_t nvm_dev_attr_show(struct device *dev,
  10                                  struct device_attribute *dattr, char *page)
  11 {
  12         struct nvm_dev *ndev = container_of(dev, struct nvm_dev, dev);
  13         struct nvm_id *id = &ndev->identity;
  14         struct nvm_id_group *grp = &id->groups[0];
  15         struct attribute *attr = &dattr->attr;
  16
  17         if (strcmp(attr->name, "version") == 0) {
  18                 return scnprintf(page, PAGE_SIZE, "%u\n", id->ver_id);
  19         } else if (strcmp(attr->name, "vendor_opcode") == 0) {
  20                 return scnprintf(page, PAGE_SIZE, "%u\n", id->vmnt);
  21         } else if (strcmp(attr->name, "capabilities") == 0) {
  22                 return scnprintf(page, PAGE_SIZE, "%u\n", id->cap);
  23         } else if (strcmp(attr->name, "device_mode") == 0) {
  24                 return scnprintf(page, PAGE_SIZE, "%u\n", id->dom);
  25         } else if (strcmp(attr->name, "media_manager") == 0) {
  26                 if (!ndev->mt)
  27                         return scnprintf(page, PAGE_SIZE, "%s\n", "none");
  28                 return scnprintf(page, PAGE_SIZE, "%s\n", ndev->mt->name);
  29         } else if (strcmp(attr->name, "ppa_format") == 0) {
  30                 return scnprintf(page, PAGE_SIZE,
  31                         "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
  32                         id->ppaf.ch_offset, id->ppaf.ch_len,
  33                         id->ppaf.lun_offset, id->ppaf.lun_len,
  34                         id->ppaf.pln_offset, id->ppaf.pln_len,
  35                         id->ppaf.blk_offset, id->ppaf.blk_len,
  36                         id->ppaf.pg_offset, id->ppaf.pg_len,
  37                         id->ppaf.sect_offset, id->ppaf.sect_len);
  38         } else if (strcmp(attr->name, "media_type") == 0) {     /* u8 */
  39                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->mtype);
  40         } else if (strcmp(attr->name, "flash_media_type") == 0) {
  41                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->fmtype);
  42         } else if (strcmp(attr->name, "num_channels") == 0) {
  43                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_ch);
  44         } else if (strcmp(attr->name, "num_luns") == 0) {
  45                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_lun);
  46         } else if (strcmp(attr->name, "num_planes") == 0) {
  47                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pln);
  48         } else if (strcmp(attr->name, "num_blocks") == 0) {     /* u16 */
  49                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_blk);
  50         } else if (strcmp(attr->name, "num_pages") == 0) {
  51                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pg);
  52         } else if (strcmp(attr->name, "page_size") == 0) {
  53                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->fpg_sz);
  54         } else if (strcmp(attr->name, "hw_sector_size") == 0) {
  55                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->csecs);
  56         } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
  57                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->sos);
  58         } else if (strcmp(attr->name, "read_typ") == 0) {
  59                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdt);
  60         } else if (strcmp(attr->name, "read_max") == 0) {
  61                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdm);
  62         } else if (strcmp(attr->name, "prog_typ") == 0) {
  63                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprt);
  64         } else if (strcmp(attr->name, "prog_max") == 0) {
  65                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprm);
  66         } else if (strcmp(attr->name, "erase_typ") == 0) {
  67                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbet);
  68         } else if (strcmp(attr->name, "erase_max") == 0) {
  69                 return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbem);
  70         } else if (strcmp(attr->name, "multiplane_modes") == 0) {
  71                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mpos);
  72         } else if (strcmp(attr->name, "media_capabilities") == 0) {
  73                 return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mccap);
  74         } else if (strcmp(attr->name, "max_phys_secs") == 0) {
  75                 return scnprintf(page, PAGE_SIZE, "%u\n",
  76                                 ndev->ops->max_phys_sect);
  77         } else {
  78                 return scnprintf(page,
  79                                  PAGE_SIZE,
  80                                  "Unhandled attr(%s) in `nvm_dev_attr_show`\n",
  81                                  attr->name);
  82         }
  83 }
  84
  85 #define NVM_DEV_ATTR_RO(_name)                                          \
  86         DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
  87
  88 static NVM_DEV_ATTR_RO(version);
  89 static NVM_DEV_ATTR_RO(vendor_opcode);
  90 static NVM_DEV_ATTR_RO(capabilities);
  91 static NVM_DEV_ATTR_RO(device_mode);
  92 static NVM_DEV_ATTR_RO(ppa_format);
  93 static NVM_DEV_ATTR_RO(media_manager);
  94
  95 static NVM_DEV_ATTR_RO(media_type);
  96 static NVM_DEV_ATTR_RO(flash_media_type);
  97 static NVM_DEV_ATTR_RO(num_channels);
  98 static NVM_DEV_ATTR_RO(num_luns);
  99 static NVM_DEV_ATTR_RO(num_planes);
 100 static NVM_DEV_ATTR_RO(num_blocks);
 101 static NVM_DEV_ATTR_RO(num_pages);
 102 static NVM_DEV_ATTR_RO(page_size);
 103 static NVM_DEV_ATTR_RO(hw_sector_size);
 104 static NVM_DEV_ATTR_RO(oob_sector_size);
 105 static NVM_DEV_ATTR_RO(read_typ);
 106 static NVM_DEV_ATTR_RO(read_max);
 107 static NVM_DEV_ATTR_RO(prog_typ);
 108 static NVM_DEV_ATTR_RO(prog_max);
 109 static NVM_DEV_ATTR_RO(erase_typ);
 110 static NVM_DEV_ATTR_RO(erase_max);
 111 static NVM_DEV_ATTR_RO(multiplane_modes);
 112 static NVM_DEV_ATTR_RO(media_capabilities);
 113 static NVM_DEV_ATTR_RO(max_phys_secs);
 114
 115 #define NVM_DEV_ATTR(_name) (dev_attr_##_name##)
 116
 117 static struct attribute *nvm_dev_attrs[] = {
 118         &dev_attr_version.attr,
 119         &dev_attr_vendor_opcode.attr,
 120         &dev_attr_capabilities.attr,
 121         &dev_attr_device_mode.attr,
 122         &dev_attr_media_manager.attr,
 123
 124         &dev_attr_ppa_format.attr,
 125         &dev_attr_media_type.attr,
 126         &dev_attr_flash_media_type.attr,
 127         &dev_attr_num_channels.attr,
 128         &dev_attr_num_luns.attr,
 129         &dev_attr_num_planes.attr,
 130         &dev_attr_num_blocks.attr,
 131         &dev_attr_num_pages.attr,
 132         &dev_attr_page_size.attr,
 133         &dev_attr_hw_sector_size.attr,
 134         &dev_attr_oob_sector_size.attr,
 135         &dev_attr_read_typ.attr,
 136         &dev_attr_read_max.attr,
 137         &dev_attr_prog_typ.attr,
 138         &dev_attr_prog_max.attr,
 139         &dev_attr_erase_typ.attr,
 140         &dev_attr_erase_max.attr,
 141         &dev_attr_multiplane_modes.attr,
 142         &dev_attr_media_capabilities.attr,
 143         &dev_attr_max_phys_secs.attr,
 144         NULL,
 145 };
 146
 147 static struct attribute_group nvm_dev_attr_group = {
 148         .name = "lightnvm",
 149         .attrs = nvm_dev_attrs,
 150 };
 151
 152 static const struct attribute_group *nvm_dev_attr_groups[] = {
 153         &nvm_dev_attr_group,
 154         NULL,
 155 };
 156
 157 static void nvm_dev_release(struct device *device)
 158 {
 159         struct nvm_dev *dev = container_of(device, struct nvm_dev, dev);
 160         struct request_queue *q = dev->q;
 161
 162         pr_debug("nvm/sysfs: `nvm_dev_release`\n");
 163
 164         blk_mq_unregister_dev(device, q);
 165
 166         nvm_free(dev);
 167 }
 168
 169 static struct device_type nvm_type = {
 170         .name           = "lightnvm",
 171         .groups         = nvm_dev_attr_groups,
 172         .release        = nvm_dev_release,
 173 };
 174
 175 int nvm_sysfs_register_dev(struct nvm_dev *dev)
 176 {
 177         int ret;
 178
 179         if (!dev->parent_dev)
 180                 return 0;
 181
 182         dev->dev.parent = dev->parent_dev;
 183         dev_set_name(&dev->dev, "%s", dev->name);
 184         dev->dev.type = &nvm_type;
 185         device_initialize(&dev->dev);
 186         ret = device_add(&dev->dev);
 187
 188         if (!ret)
 189                 blk_mq_register_dev(&dev->dev, dev->q);
 190
 191         return ret;
 192 }
 193
 194 void nvm_sysfs_unregister_dev(struct nvm_dev *dev)
 195 {
 196         if (dev && dev->parent_dev)
 197                 kobject_put(&dev->dev.kobj);
 198 }