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authorMax Gurtovoy <mgurtovoy@nvidia.com>2021-09-23 00:55:36 +0300
committerChristoph Hellwig <hch@lst.de>2021-10-20 20:16:01 +0300
commit6d1555cc41c088d738b4968009b32aaeda8542a3 (patch)
tree4c7c2848a45e7e96afc1b85b36181c5d7d55c6de /drivers/nvme/target/core.c
parent44c3c6257e99c6284f312206de73783575fc8906 (diff)
downloadlinux-6d1555cc41c088d738b4968009b32aaeda8542a3.tar.xz
nvmet: add get_max_queue_size op for controllers
Some transports, such as RDMA, would like to set the queue size according to device/port/ctrl characteristics. Add a new nvmet transport op that is called during ctrl initialization. This will not effect transports that don't implement this option. Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target/core.c')
-rw-r--r--drivers/nvme/target/core.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index b8425fa34300..93107af3310d 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -1205,7 +1205,10 @@ static void nvmet_init_cap(struct nvmet_ctrl *ctrl)
/* CC.EN timeout in 500msec units: */
ctrl->cap |= (15ULL << 24);
/* maximum queue entries supported: */
- ctrl->cap |= NVMET_QUEUE_SIZE - 1;
+ if (ctrl->ops->get_max_queue_size)
+ ctrl->cap |= ctrl->ops->get_max_queue_size(ctrl) - 1;
+ else
+ ctrl->cap |= NVMET_QUEUE_SIZE - 1;
if (nvmet_is_passthru_subsys(ctrl->subsys))
nvmet_passthrough_override_cap(ctrl);
@@ -1367,6 +1370,7 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
mutex_init(&ctrl->lock);
ctrl->port = req->port;
+ ctrl->ops = req->ops;
INIT_WORK(&ctrl->async_event_work, nvmet_async_event_work);
INIT_LIST_HEAD(&ctrl->async_events);
@@ -1405,8 +1409,6 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
}
ctrl->cntlid = ret;
- ctrl->ops = req->ops;
-
/*
* Discovery controllers may use some arbitrary high value
* in order to cleanup stale discovery sessions