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lightnvm: reduce number of nvm_id groups to one

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The number of configuration groups has been limited to one in current
code, even if there is support for up to four. With the introduction
of the open-channel SSD 1.3 specification, only a single
group is exposed onwards. Reflect this in the nvm_id structure.

Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2017-01-31 13:17:15 +01:00 committed by Jens Axboe
parent dab8ee9e8a
commit 19bd6fe73c
4 changed files with 39 additions and 50 deletions
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3
drivers/block/null_blk.c
View File

@ -460,7 +460,6 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id)
id->ver_id = 0x1;
id->vmnt = 0;
id->cgrps = 1;
id->cap = 0x2;
id->dom = 0x1;
@ -479,7 +478,7 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id)
sector_div(size, bs); /* convert size to pages */
size >>= 8; /* concert size to pgs pr blk */
grp = &id->groups[0];
grp = &id->grp;
grp->mtype = 0;
grp->fmtype = 0;
grp->num_ch = 1;

12
drivers/lightnvm/core.c
View File

@ -884,7 +884,7 @@ static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
static int nvm_core_init(struct nvm_dev *dev)
{
struct nvm_id *id = &dev->identity;
struct nvm_id_group *grp = &id->groups[0];
struct nvm_id_group *grp = &id->grp;
struct nvm_geo *geo = &dev->geo;
int ret;
@ -988,20 +988,14 @@ static int nvm_init(struct nvm_dev *dev)
goto err;
}
pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n",
dev->identity.ver_id, dev->identity.vmnt,
dev->identity.cgrps);
pr_debug("nvm: ver:%x nvm_vendor:%x\n",
dev->identity.ver_id, dev->identity.vmnt);
if (dev->identity.ver_id != 1) {
pr_err("nvm: device not supported by kernel.");
goto err;
}
if (dev->identity.cgrps != 1) {
pr_err("nvm: only one group configuration supported.");
goto err;
}
ret = nvm_core_init(dev);
if (ret) {
pr_err("nvm: could not initialize core structures.\n");

13
drivers/nvme/host/lightnvm.c
View File

@ -248,13 +248,12 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
{
struct nvme_nvm_id_group *src;
struct nvm_id_group *dst;
int i, end;
end = min_t(u32, 4, nvm_id->cgrps);
if (nvme_nvm_id->cgrps != 1)
return -EINVAL;
for (i = 0; i < end; i++) {
src = &nvme_nvm_id->groups[i];
dst = &nvm_id->groups[i];
src = &nvme_nvm_id->groups[0];
dst = &nvm_id->grp;
dst->mtype = src->mtype;
dst->fmtype = src->fmtype;
@ -292,7 +291,6 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
memcpy(dst->lptbl.mlc.pairs, src->lptbl.mlc.pairs,
dst->lptbl.mlc.num_pairs);
}
}
return 0;
}
@ -321,7 +319,6 @@ static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id)
nvm_id->ver_id = nvme_nvm_id->ver_id;
nvm_id->vmnt = nvme_nvm_id->vmnt;
nvm_id->cgrps = nvme_nvm_id->cgrps;
nvm_id->cap = le32_to_cpu(nvme_nvm_id->cap);
nvm_id->dom = le32_to_cpu(nvme_nvm_id->dom);
memcpy(&nvm_id->ppaf, &nvme_nvm_id->ppaf,
@ -622,7 +619,7 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
return 0;
id = &ndev->identity;
grp = &id->groups[0];
grp = &id->grp;
attr = &dattr->attr;
if (strcmp(attr->name, "version") == 0) {

3
include/linux/lightnvm.h
View File

@ -200,11 +200,10 @@ struct nvm_addr_format {
struct nvm_id {
u8 ver_id;
u8 vmnt;
u8 cgrps;
u32 cap;
u32 dom;
struct nvm_addr_format ppaf;
struct nvm_id_group groups[4];
struct nvm_id_group grp;
} __packed;
struct nvm_target {