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authorMatias Bjørling <m@bjorling.me>2015-11-16 15:34:44 +0100
committerJens Axboe <axboe@fb.com>2015-11-16 15:20:34 -0700
commit7386af270c72be65c7cb2ba4ad0d4e70dc373106 (patch)
treec7974069275f06d340ad7b14f0cb69479bad6110 /drivers/lightnvm
parentc1480ad5943261e01a62eaa7132eab76f9c490e0 (diff)
downloadlinux-7386af270c72be65c7cb2ba4ad0d4e70dc373106.tar.bz2
lightnvm: remove linear and device addr modes
The linear and device specific address modes can be replaced with a simple offset and bit length conversion that is generic across all devices. This both simplifies the specification and removes the special case for qemu nvme, that previously relied on the linear address mapping. 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.c3
-rw-r--r--drivers/lightnvm/gennvm.c12
-rw-r--r--drivers/lightnvm/rrpc.c32
3 files changed, 38 insertions, 9 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 899f6b9a9f68..790b1d7a8d43 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -174,8 +174,7 @@ static int nvm_core_init(struct nvm_dev *dev)
dev->sec_size = grp->csecs;
dev->oob_size = grp->sos;
dev->sec_per_pg = grp->fpg_sz / grp->csecs;
- dev->addr_mode = id->ppat;
- dev->addr_format = id->ppaf;
+ memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
dev->plane_mode = NVM_PLANE_SINGLE;
dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 8cfc0114ff13..c0d0eb2357a8 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -73,7 +73,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
struct nvm_block *blk;
int i;
- ppa = addr_to_generic_mode(gn->dev, ppa);
+ ppa = dev_to_generic_addr(gn->dev, ppa);
lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun];
for (i = 0; i < nr_blocks; i++) {
@@ -179,7 +179,7 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
ppa.ppa = 0;
ppa.g.ch = lun->vlun.chnl_id;
ppa.g.lun = lun->vlun.id;
- ppa = generic_to_addr_mode(dev, ppa);
+ ppa = generic_to_dev_addr(dev, ppa);
ret = dev->ops->get_bb_tbl(dev->q, ppa,
dev->blks_per_lun,
@@ -304,10 +304,10 @@ static void gennvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
- rqd->ppa_list[i] = addr_to_generic_mode(dev,
+ rqd->ppa_list[i] = dev_to_generic_addr(dev,
rqd->ppa_list[i]);
} else {
- rqd->ppa_addr = addr_to_generic_mode(dev, rqd->ppa_addr);
+ rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
}
}
@@ -317,10 +317,10 @@ static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
- rqd->ppa_list[i] = generic_to_addr_mode(dev,
+ rqd->ppa_list[i] = generic_to_dev_addr(dev,
rqd->ppa_list[i]);
} else {
- rqd->ppa_addr = generic_to_addr_mode(dev, rqd->ppa_addr);
+ rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
}
}
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 7ba64c87ba1c..75e59c3a3f96 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -123,12 +123,42 @@ static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
return blk->id * rrpc->dev->pgs_per_blk;
}
+static struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
+ struct ppa_addr r)
+{
+ struct ppa_addr l;
+ int secs, pgs, blks, luns;
+ sector_t ppa = r.ppa;
+
+ l.ppa = 0;
+
+ div_u64_rem(ppa, dev->sec_per_pg, &secs);
+ l.g.sec = secs;
+
+ sector_div(ppa, dev->sec_per_pg);
+ div_u64_rem(ppa, dev->sec_per_blk, &pgs);
+ l.g.pg = pgs;
+
+ sector_div(ppa, dev->pgs_per_blk);
+ div_u64_rem(ppa, dev->blks_per_lun, &blks);
+ l.g.blk = blks;
+
+ sector_div(ppa, dev->blks_per_lun);
+ div_u64_rem(ppa, dev->luns_per_chnl, &luns);
+ l.g.lun = luns;
+
+ sector_div(ppa, dev->luns_per_chnl);
+ l.g.ch = ppa;
+
+ return l;
+}
+
static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_dev *dev, u64 addr)
{
struct ppa_addr paddr;
paddr.ppa = addr;
- return __linear_to_generic_addr(dev, paddr);
+ return linear_to_generic_addr(dev, paddr);
}
/* requires lun->lock taken */