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Message-Id: <1479730237-20797-3-git-send-email-javier@cnexlabs.com>
Date: Mon, 21 Nov 2016 13:10:31 +0100
From: "Javier González" <jg@...htnvm.io>
To: mb@...htnvm.io
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
Javier González <javier@...xlabs.com>
Subject: [PATCH 2/8] lightnvm: remove get_lun operation on gennvm
Since LUNs are managed internally on the target, there is no need for
the media manager to implement a get_lun operation.
Signed-off-by: Javier González <javier@...xlabs.com>
---
drivers/lightnvm/gennvm.c | 13 +------------
drivers/lightnvm/rrpc.c | 23 +++++++++++------------
include/linux/lightnvm.h | 8 ++------
3 files changed, 14 insertions(+), 30 deletions(-)
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 8791a2a..3cf5d59 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -159,7 +159,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
tdisk->fops = &gen_fops;
tdisk->queue = tqueue;
- targetdata = tt->init(tgt_dev, tdisk, s->lun_begin, s->lun_end);
+ targetdata = tt->init(tgt_dev, tdisk, &t->lun_list);
if (IS_ERR(targetdata))
goto err_init;
@@ -613,16 +613,6 @@ static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
return nvm_erase_ppa(dev, &addr, 1, flags);
}
-static struct nvm_lun *gen_get_lun(struct nvm_dev *dev, int lunid)
-{
- struct gen_dev *gn = dev->mp;
-
- if (unlikely(lunid >= dev->geo.nr_luns))
- return NULL;
-
- return &gn->luns[lunid];
-}
-
static void gen_lun_info_print(struct nvm_dev *dev)
{
struct gen_dev *gn = dev->mp;
@@ -655,7 +645,6 @@ static struct nvmm_type gen = {
.mark_blk = gen_mark_blk,
- .get_lun = gen_get_lun,
.lun_info_print = gen_lun_info_print,
.get_area = gen_get_area,
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 5377c7a..165b9d3 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -1199,10 +1199,11 @@ static void rrpc_luns_free(struct rrpc *rrpc)
kfree(rrpc->luns);
}
-static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
+static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
{
struct nvm_tgt_dev *dev = rrpc->dev;
struct nvm_geo *geo = &dev->geo;
+ struct nvm_lun *lun;
struct rrpc_lun *rlun;
int i, j, ret = -EINVAL;
@@ -1218,16 +1219,11 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
if (!rrpc->luns)
return -ENOMEM;
+ i = 0;
+
/* 1:1 mapping */
- for (i = 0; i < rrpc->nr_luns; i++) {
- int lunid = lun_begin + i;
- struct nvm_lun *lun;
-
- lun = dev->mt->get_lun(dev->parent, lunid);
- if (!lun)
- goto err;
-
- rlun = &rrpc->luns[i];
+ list_for_each_entry(lun, lun_list, list) {
+ rlun = &rrpc->luns[i++];
rlun->parent = lun;
rlun->blocks = vzalloc(sizeof(struct rrpc_block) *
geo->blks_per_lun);
@@ -1256,6 +1252,8 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
spin_lock_init(&rlun->lock);
}
+ WARN_ON(i != rrpc->nr_luns);
+
return 0;
err:
return ret;
@@ -1410,12 +1408,13 @@ static int rrpc_luns_configure(struct rrpc *rrpc)
static struct nvm_tgt_type tt_rrpc;
static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
- int lun_begin, int lun_end)
+ struct list_head *lun_list)
{
struct request_queue *bqueue = dev->q;
struct request_queue *tqueue = tdisk->queue;
struct nvm_geo *geo = &dev->geo;
struct rrpc *rrpc;
+ int lun_begin = (list_first_entry(lun_list, struct nvm_lun, list))->id;
sector_t soffset;
int ret;
@@ -1450,7 +1449,7 @@ static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
}
rrpc->soffset = soffset;
- ret = rrpc_luns_init(rrpc, lun_begin, lun_end);
+ ret = rrpc_luns_init(rrpc, lun_list);
if (ret) {
pr_err("nvm: rrpc: could not initialize luns\n");
goto err;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 1f1588c..e56c352 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -504,8 +504,8 @@ static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
typedef sector_t (nvm_tgt_capacity_fn)(void *);
-typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *, int,
- int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
+ struct list_head *lun_list);
typedef void (nvm_tgt_exit_fn)(void *);
struct nvm_tgt_type {
@@ -541,7 +541,6 @@ typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
-typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
@@ -563,9 +562,6 @@ struct nvmm_type {
/* Bad block mgmt */
nvmm_mark_blk_fn *mark_blk;
- /* Configuration management */
- nvmm_get_lun_fn *get_lun;
-
/* Statistics */
nvmm_lun_info_print_fn *lun_info_print;
--
2.7.4
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