lightnvm: store rrpc->soffset in device sector size

Since we mainly use soffset in device sector size, we therefore store
this value in rrpc->soffset, instead of the offset in 512byte sector
size. This eliminates the "(ilog2(dev->sec_size) - 9)" calculation on
each I/O.

Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Updated patch description.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index c0e303c..3143b98 100644 (file)
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -1039,11 +1039,8 @@ static int rrpc_map_init(struct rrpc *rrpc)
 {
        struct nvm_dev *dev = rrpc->dev;
        sector_t i;
-       u64 slba;
        int ret;
 
-       slba = rrpc->soffset >> (ilog2(dev->sec_size) - 9);
-
        rrpc->trans_map = vzalloc(sizeof(struct rrpc_addr) * rrpc->nr_sects);
        if (!rrpc->trans_map)
                return -ENOMEM;
@@ -1065,8 +1062,8 @@ static int rrpc_map_init(struct rrpc *rrpc)
                return 0;
 
        /* Bring up the mapping table from device */
-       ret = dev->ops->get_l2p_tbl(dev, slba, rrpc->nr_sects, rrpc_l2p_update,
-                                                                       rrpc);
+       ret = dev->ops->get_l2p_tbl(dev, rrpc->soffset, rrpc->nr_sects,
+                                       rrpc_l2p_update, rrpc);
        if (ret) {
                pr_err("nvm: rrpc: could not read L2P table.\n");
                return -EINVAL;
@@ -1220,18 +1217,24 @@ static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
        struct nvm_dev *dev = rrpc->dev;
        struct nvmm_type *mt = dev->mt;
        sector_t size = rrpc->nr_sects * dev->sec_size;
+       int ret;
 
        size >>= 9;
 
-       return mt->get_area(dev, begin, size);
+       ret = mt->get_area(dev, begin, size);
+       if (!ret)
+               *begin >>= (ilog2(dev->sec_size) - 9);
+
+       return ret;
 }
 
 static void rrpc_area_free(struct rrpc *rrpc)
 {
        struct nvm_dev *dev = rrpc->dev;
        struct nvmm_type *mt = dev->mt;
+       sector_t begin = rrpc->soffset << (ilog2(dev->sec_size) - 9);
 
-       mt->put_area(dev, rrpc->soffset);
+       mt->put_area(dev, begin);
 }
 
 static void rrpc_free(struct rrpc *rrpc)