[U-Boot] [PATCH] nvme: add accessor to namespace id and eui64

[Patrick Wildt <patrick@blueri.se>]

This adds a function which can be used by e.g. EFI to retrieve
the namespace identifier and EUI64.  For that it adds the EUI64
to its driver internal namespace structure and copies the EUI64
during namespace identification.

Signed-off-by: Patrick Wildt <patrick@blueri.se>

diff --git a/drivers/nvme/nvme.c b/drivers/nvme/nvme.c
index 47f101e280..e9994ae5d4 100644
--- a/drivers/nvme/nvme.c
+++ b/drivers/nvme/nvme.c
@@ -621,6 +621,14 @@ static int nvme_get_info_from_identify(struct nvme_dev *dev)
 	return 0;
 }
 
+u32 nvme_get_namespace_id(struct udevice *udev, u8 *eui64)
+{
+	struct nvme_ns *ns = dev_get_priv(udev);
+	if (eui64)
+		memcpy(eui64, ns->eui64, sizeof(ns->eui64));
+	return ns->ns_id;
+}
+
 int nvme_scan_namespace(void)
 {
 	struct uclass *uc;
@@ -657,6 +665,7 @@ static int nvme_blk_probe(struct udevice *udev)
 	if (nvme_identify(ndev, ns->ns_id, 0, (dma_addr_t)(long)id))
 		return -EIO;
 
+	memcpy(&ns->eui64, &id->eui64, sizeof(id->eui64));
 	flbas = id->flbas & NVME_NS_FLBAS_LBA_MASK;
 	ns->flbas = flbas;
 	ns->lba_shift = id->lbaf[flbas].ds;
diff --git a/drivers/nvme/nvme.h b/drivers/nvme/nvme.h
index 922f7abfe8..0e8cb221a7 100644
--- a/drivers/nvme/nvme.h
+++ b/drivers/nvme/nvme.h
@@ -637,6 +637,7 @@ struct nvme_ns {
 	struct list_head list;
 	struct nvme_dev *dev;
 	unsigned ns_id;
+	u8 eui64[8];
 	int devnum;
 	int lba_shift;
 	u8 flbas;
diff --git a/include/nvme.h b/include/nvme.h
index 2c3d14d241..c8fdd44da0 100644
--- a/include/nvme.h
+++ b/include/nvme.h
@@ -78,4 +78,15 @@ int nvme_scan_namespace(void);
  */
 int nvme_print_info(struct udevice *udev);
 
+/**
+ * nvme_get_namespace_id - return namespace identifier
+ *
+ * This returns the namespace identifier.
+ *
+ * @udev:	NVMe controller device
+ * @eui64:	IEEE Extended Unique Identifier
+ * @return:	namespace identifier
+ */
+u32 nvme_get_namespace_id(struct udevice *udev, u8 *eui64);
+
 #endif /* __NVME_H__ */