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[16/19] lightnvm: define chunk states

Message ID 1519651038-16845-17-git-send-email-javier@cnexlabs.com (mailing list archive)
State New, archived
Headers show

Commit Message

=?UTF-8?q?Javier=20Gonz=C3=A1lez?= Feb. 26, 2018, 1:17 p.m. UTC 
Define chunk states as given in the 2.0 spec. Also, add an extra chunk
state that signals that the chunk is in use by the host. This allows for
the chunk metadata to be "owned" by a target when active, thus
completing the chunk state machine from the host perspective and
facilitating sanity checks. This state is transparent for the device.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 include/linux/lightnvm.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
diff mbox

Patch

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 776ffdc2e137..74830d5dbd6e 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -232,6 +232,20 @@  struct nvm_addr_format {
 	u64	rsv_mask[2];
 };
 
+enum {
+	/* Chunk states */
+	NVM_CHK_ST_FREE =	1 << 0,
+	NVM_CHK_ST_CLOSED =	1 << 1,
+	NVM_CHK_ST_OPEN =	1 << 2,
+	NVM_CHK_ST_OFFLINE =	1 << 3,
+	NVM_CHK_ST_HOST_USE =	1 << 7,
+
+	/* Chunk types */
+	NVM_CHK_TP_W_SEQ =	1 << 0,
+	NVM_CHK_TP_W_RAN =	1 << 1,
+	NVM_CHK_TP_SZ_SPEC =	1 << 4,
+};
+
 /*
  * Note: The structure size is linked to nvme_nvm_chk_meta such that the same
  * buffer can be used when converting from little endian to cpu addressing.