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lightnvm: implement get log report chunk helpers

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The 2.0 spec provides a report chunk log page that can be retrieved
using the stangard nvme get log page. This replaces the dedicated
get/put bad block table in 1.2.

This patch implements the helper functions to allow targets retrieve the
chunk metadata using get log page. It makes nvme_get_log_ext available
outside of nvme core so that we can use it form lightnvm.

Signed-off-by: Javier González <[email protected]>
Signed-off-by: Matias Bjørling <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Javier González 2018-03-30 00:05:17 +02:00 • committed by Jens Axboe
commit a294c19945
4 changed files with 111 additions and 2 deletions
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4
drivers/nvme/host/core.c
View file

@ -2219,8 +2219,8 @@ out_unlock:
}
int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
u8 log_page, void *log,
size_t size, size_t offset)
u8 log_page, void *log,
size_t size, size_t offset)
{
struct nvme_command c = { };
unsigned long dwlen = size / 4 - 1;

74
drivers/nvme/host/lightnvm.c
View file

@ -35,6 +35,10 @@ enum nvme_nvm_admin_opcode {
nvme_nvm_admin_set_bb_tbl = 0xf1,
};
enum nvme_nvm_log_page {
NVME_NVM_LOG_REPORT_CHUNK = 0xca,
};
struct nvme_nvm_ph_rw {
__u8 opcode;
__u8 flags;
@ -236,6 +240,16 @@ struct nvme_nvm_id20 {
__u8 vs[1024];
};
struct nvme_nvm_chk_meta {
__u8 state;
__u8 type;
__u8 wi;
__u8 rsvd[5];
__le64 slba;
__le64 cnlb;
__le64 wp;
};
/*
* Check we didn't inadvertently grow the command struct
*/
@ -252,6 +266,9 @@ static inline void _nvme_nvm_check_size(void)
BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_id20_addrf) != 8);
BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE);
BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) != 32);
BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) !=
sizeof(struct nvm_chk_meta));
}
static void nvme_nvm_set_addr_12(struct nvm_addrf_12 *dst,
@ -552,6 +569,61 @@ static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
return ret;
}
/*
* Expect the lba in device format
*/
static int nvme_nvm_get_chk_meta(struct nvm_dev *ndev,
struct nvm_chk_meta *meta,
sector_t slba, int nchks)
{
struct nvm_geo *geo = &ndev->geo;
struct nvme_ns *ns = ndev->q->queuedata;
struct nvme_ctrl *ctrl = ns->ctrl;
struct nvme_nvm_chk_meta *dev_meta = (struct nvme_nvm_chk_meta *)meta;
struct ppa_addr ppa;
size_t left = nchks * sizeof(struct nvme_nvm_chk_meta);
size_t log_pos, offset, len;
int ret, i;
/* Normalize lba address space to obtain log offset */
ppa.ppa = slba;
ppa = dev_to_generic_addr(ndev, ppa);
log_pos = ppa.m.chk;
log_pos += ppa.m.pu * geo->num_chk;
log_pos += ppa.m.grp * geo->num_lun * geo->num_chk;
offset = log_pos * sizeof(struct nvme_nvm_chk_meta);
while (left) {
len = min_t(unsigned int, left, ctrl->max_hw_sectors << 9);
ret = nvme_get_log_ext(ctrl, ns, NVME_NVM_LOG_REPORT_CHUNK,
dev_meta, len, offset);
if (ret) {
dev_err(ctrl->device, "Get REPORT CHUNK log error\n");
break;
}
for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) {
meta->state = dev_meta->state;
meta->type = dev_meta->type;
meta->wi = dev_meta->wi;
meta->slba = le64_to_cpu(dev_meta->slba);
meta->cnlb = le64_to_cpu(dev_meta->cnlb);
meta->wp = le64_to_cpu(dev_meta->wp);
meta++;
dev_meta++;
}
offset += len;
left -= len;
}
return ret;
}
static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
struct nvme_nvm_command *c)
{
@ -683,6 +755,8 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
.get_bb_tbl = nvme_nvm_get_bb_tbl,
.set_bb_tbl = nvme_nvm_set_bb_tbl,
.get_chk_meta = nvme_nvm_get_chk_meta,
.submit_io = nvme_nvm_submit_io,
.submit_io_sync = nvme_nvm_submit_io_sync,