summaryrefslogtreecommitdiff
path: root/drivers/lightnvm
diff options
context:
space:
mode:
authorMatias Bjørling <m@bjorling.me>2016-01-12 09:49:38 +0300
committerJens Axboe <axboe@fb.com>2016-01-12 18:21:18 +0300
commitb769207678176d590ea61ce7a64c9100925668b7 (patch)
tree74cd968a5a847b6d74fbf42a9b76ce0826ca8eda /drivers/lightnvm
parent5569615424613aa006005f18b03a3a12738a47d7 (diff)
downloadlinux-b769207678176d590ea61ce7a64c9100925668b7.tar.xz
lightnvm: use system block for mm initialization
Use system block information to register the appropriate media manager. This enables the LightNVM subsystem to instantiate a media manager selected by the user, instead of relying on automatic detection by each media manager loaded in the kernel. A device must now be initialized before it can proceed to initialize its media manager. Upon initialization, the configured media manager is automatically initialized as well. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index ee08fac6f327..9e5712dda062 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -106,6 +106,9 @@ struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
lockdep_assert_held(&nvm_lock);
list_for_each_entry(mt, &nvm_mgrs, list) {
+ if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN))
+ continue;
+
ret = mt->register_mgr(dev);
if (ret < 0) {
pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
@@ -569,9 +572,16 @@ int nvm_register(struct request_queue *q, char *disk_name,
}
}
+ ret = nvm_get_sysblock(dev, &dev->sb);
+ if (!ret)
+ pr_err("nvm: device not initialized.\n");
+ else if (ret < 0)
+ pr_err("nvm: err (%d) on device initialization\n", ret);
+
/* register device with a supported media manager */
down_write(&nvm_lock);
- dev->mt = nvm_init_mgr(dev);
+ if (ret > 0)
+ dev->mt = nvm_init_mgr(dev);
list_add(&dev->devices, &nvm_devices);
up_write(&nvm_lock);
@@ -1030,6 +1040,7 @@ static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
{
struct nvm_dev *dev;
struct nvm_sb_info info;
+ int ret;
down_write(&nvm_lock);
dev = nvm_find_nvm_dev(init->dev);
@@ -1044,7 +1055,17 @@ static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
info.fs_ppa.ppa = -1;
- return nvm_init_sysblock(dev, &info);
+ ret = nvm_init_sysblock(dev, &info);
+ if (ret)
+ return ret;
+
+ memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
+
+ down_write(&nvm_lock);
+ dev->mt = nvm_init_mgr(dev);
+ up_write(&nvm_lock);
+
+ return 0;
}
static long nvm_ioctl_dev_init(struct file *file, void __user *arg)