From: Sagi Grimberg <sagi@grimberg.me>
Date: Tue, 20 Nov 2018 10:34:19 +0100
Subject: [PATCH] nvmet: expose support for fabrics SQ flow control disable in
treq
Git-commit: 9b95d2fb857f242aacbf4e205656818b0ef067e1
Patch-mainline: v5.0-rc1
References: bsc#1104967,FATE#325924
Technical Proposal introduces an indication for SQ flow control
disable support. Expose it since we are able to operate in this mode.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/nvme/target/configfs.c | 1 +
include/linux/nvme.h | 8 +++++---
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 260a401db01c..db2cb64be7ba 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -1214,6 +1214,7 @@ static struct config_group *nvmet_ports_make(struct config_group *group,
port->inline_data_size = -1; /* < 0 == let the transport choose */
port->disc_addr.portid = cpu_to_le16(portid);
+ port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW;
config_group_init_type_name(&port->group, name, &nvmet_port_type);
config_group_init_type_name(&port->subsys_group,
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 4fc48071e5ea..c03973c215ad 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -58,11 +58,13 @@ enum {
/* Transport Requirements codes for Discovery Log Page entry TREQ field */
enum {
- NVMF_TREQ_NOT_SPECIFIED = 0, /* Not specified */
- NVMF_TREQ_REQUIRED = 1, /* Required */
- NVMF_TREQ_NOT_REQUIRED = 2, /* Not Required */
+ NVMF_TREQ_NOT_SPECIFIED = 0, /* Not specified */
+ NVMF_TREQ_REQUIRED = 1, /* Required */
+ NVMF_TREQ_NOT_REQUIRED = 2, /* Not Required */
#define NVME_TREQ_SECURE_CHANNEL_MASK \
(NVMF_TREQ_REQUIRED | NVMF_TREQ_NOT_REQUIRED)
+
+ NVMF_TREQ_DISABLE_SQFLOW = (1 << 2), /* Supports SQ flow control disable */
};
/* RDMA QP Service Type codes for Discovery Log Page entry TSAS
--
2.16.4