Commit bf643185 authored by Matias Bjørling's avatar Matias Bjørling Committed by Jens Axboe

lightnvm: allow to force mm initialization

System block allows the device to initialize with its configured media
manager. The system blocks is written to disk, and read again when media
manager is determined. For this to work, the backend must store the
data. Device drivers, such as null_blk, does not have any backend
storage. This patch allows the media manager to be initialized without a
storage backend.

It also fix incorrect configuration of capabilities in null_blk, as it
does not support get/set bad block interface.
Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 6dde1d6c
...@@ -478,7 +478,7 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) ...@@ -478,7 +478,7 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id)
id->ver_id = 0x1; id->ver_id = 0x1;
id->vmnt = 0; id->vmnt = 0;
id->cgrps = 1; id->cgrps = 1;
id->cap = 0x3; id->cap = 0x2;
id->dom = 0x1; id->dom = 0x1;
id->ppaf.blk_offset = 0; id->ppaf.blk_offset = 0;
......
...@@ -572,11 +572,13 @@ int nvm_register(struct request_queue *q, char *disk_name, ...@@ -572,11 +572,13 @@ int nvm_register(struct request_queue *q, char *disk_name,
} }
} }
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
ret = nvm_get_sysblock(dev, &dev->sb); ret = nvm_get_sysblock(dev, &dev->sb);
if (!ret) if (!ret)
pr_err("nvm: device not initialized.\n"); pr_err("nvm: device not initialized.\n");
else if (ret < 0) else if (ret < 0)
pr_err("nvm: err (%d) on device initialization\n", ret); pr_err("nvm: err (%d) on device initialization\n", ret);
}
/* register device with a supported media manager */ /* register device with a supported media manager */
down_write(&nvm_lock); down_write(&nvm_lock);
...@@ -1055,9 +1057,11 @@ static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) ...@@ -1055,9 +1057,11 @@ static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
info.fs_ppa.ppa = -1; info.fs_ppa.ppa = -1;
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
ret = nvm_init_sysblock(dev, &info); ret = nvm_init_sysblock(dev, &info);
if (ret) if (ret)
return ret; return ret;
}
memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
...@@ -1117,7 +1121,10 @@ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) ...@@ -1117,7 +1121,10 @@ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
dev->mt = NULL; dev->mt = NULL;
} }
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT)
return nvm_dev_factory(dev, fact.flags); return nvm_dev_factory(dev, fact.flags);
return 0;
} }
static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
......
...@@ -135,6 +135,10 @@ enum { ...@@ -135,6 +135,10 @@ enum {
/* Memory types */ /* Memory types */
NVM_ID_FMTYPE_SLC = 0, NVM_ID_FMTYPE_SLC = 0,
NVM_ID_FMTYPE_MLC = 1, NVM_ID_FMTYPE_MLC = 1,
/* Device capabilities */
NVM_ID_DCAP_BBLKMGMT = 0x1,
NVM_UD_DCAP_ECC = 0x2,
}; };
struct nvm_id_lp_mlc { struct nvm_id_lp_mlc {
......
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