On 5 Feb 2018, at 13.15, Matias Bjørling [off-list ref] wrote:

Implement the geometry data structures for 2.0 and enable a drive
to be identified as one, including exposing the appropriate 2.0
sysfs entries.

Signed-off-by: Matias Bjørling <redacted>
---
drivers/lightnvm/core.c      |   2 +-
drivers/nvme/host/lightnvm.c | 334 +++++++++++++++++++++++++++++++++++++------
include/linux/lightnvm.h     |  11 +-
3 files changed, 295 insertions(+), 52 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index c72863b36439..250e74dfa120 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c

@@ -934,7 +934,7 @@ static int nvm_init(struct nvm_dev *dev)

	pr_debug("nvm: ver:%x nvm_vendor:%x\n",
			dev->identity.ver_id, dev->identity.vmnt);

-	if (dev->identity.ver_id != 1) {
+	if (dev->identity.ver_id != 1 && dev->identity.ver_id != 2) {
		pr_err("nvm: device not supported by kernel.");
		goto err;
	}

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 6412551ecc65..a9c010655ccc 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c

@@ -184,6 +184,58 @@ struct nvme_nvm_bb_tbl {

	__u8	blk[0];
};

+struct nvme_nvm_id20_addrf {
+	__u8			grp_len;
+	__u8			pu_len;
+	__u8			chk_len;
+	__u8			lba_len;
+	__u8			resv[4];
+};
+
+struct nvme_nvm_id20 {
+	__u8			mjr;
+	__u8			mnr;
+	__u8			resv[6];
+
+	struct nvme_nvm_id20_addrf lbaf;
+
+	__u32			mccap;
+	__u8			resv2[12];
+
+	__u8			wit;
+	__u8			resv3[31];
+
+	/* Geometry */
+	__u16			num_grp;
+	__u16			num_pu;
+	__u32			num_chk;
+	__u32			clba;
+	__u8			resv4[52];
+
+	/* Write data requirements */
+	__u32			ws_min;
+	__u32			ws_opt;
+	__u32			mw_cunits;
+	__u32			maxoc;
+	__u32			maxocpu;
+	__u8			resv5[44];
+
+	/* Performance related metrics */
+	__u32			trdt;
+	__u32			trdm;
+	__u32			twrt;
+	__u32			twrm;
+	__u32			tcrst;
+	__u32			tcrsm;
+	__u8			resv6[40];
+
+	/* Reserved area */
+	__u8			resv7[2816];
+
+	/* Vendor specific */
+	__u8			vs[1024];
+};