lightnvm: move device L2P detection to core

A 1.2 device is able to manage the logical to physical mapping
table internally or leave it to the host.

A target only supports one of those approaches, and therefore must
check on initialization. Move this check to core to avoid each target
implement the check.

Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 68553c7..9643527 100644 (file)
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -355,6 +355,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
                return -EINVAL;
        }
 
+       if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) {
+               pr_err("nvm: device is incompatible with target L2P type.\n");
+               return -EINVAL;
+       }
+
        if (nvm_target_exists(create->tgtname)) {
                pr_err("nvm: target name already exists (%s)\n",
                                                        create->tgtname);

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 537e98f..039f62d 100644 (file)
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -1210,13 +1210,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
                return ERR_PTR(-EINVAL);
        }
 
-       if (geo->version == NVM_OCSSD_SPEC_12 && geo->dom & NVM_RSP_L2P) {
-               pblk_err(pblk, "host-side L2P table not supported. (%x)\n",
-                                                       geo->dom);
-               kfree(pblk);
-               return ERR_PTR(-EINVAL);
-       }
-
        spin_lock_init(&pblk->resubmit_lock);
        spin_lock_init(&pblk->trans_lock);
        spin_lock_init(&pblk->lock);

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 8acc2fe..f4a8469 100644 (file)
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -495,9 +495,15 @@ typedef void (nvm_tgt_exit_fn)(void *, bool);
 typedef int (nvm_tgt_sysfs_init_fn)(struct gendisk *);
 typedef void (nvm_tgt_sysfs_exit_fn)(struct gendisk *);
 
+enum {
+       NVM_TGT_F_DEV_L2P = 0,
+       NVM_TGT_F_HOST_L2P = 1 << 0,
+};
+
 struct nvm_tgt_type {
        const char *name;
        unsigned int version[3];
+       int flags;
 
        /* target entry points */
        nvm_tgt_make_rq_fn *make_rq;