diff options
| author | James Smart <jsmart2021@gmail.com> | 2017-04-11 11:32:28 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-04-21 16:41:48 +0200 |
| commit | 39498faef7c02f9f6de4060ccdc7e8975a6e690b (patch) | |
| tree | 7b464f57fa4b1314c3f874f246864b8a9ce6ab4d /drivers/nvme/target/fcloop.c | |
| parent | 1c05cf9058027dd80630d54aa3527eb2e3152e80 (diff) | |
nvmet_fc: add target feature flags for upcall isr contexts
Two new feature flags were added to control whether upcalls to the
transport result in context switches or stay in the calling context.
NVMET_FCTGTFEAT_CMD_IN_ISR:
By default, if the flag is not set, the transport assumes the
lldd is in a non-isr context and in the cpu context it should be
for the io queue. As such, the cmd handler is called directly in the
calling context.
If the flag is set, indicating the upcall is an isr context, the
transport mandates a transition to a workqueue. The workqueue assigned
to the queue is used for the context.
NVMET_FCTGTFEAT_OPDONE_IN_ISR
By default, if the flag is not set, the transport assumes the
lldd is in a non-isr context and in the cpu context it should be
for the io queue. As such, the fcp operation done callback is called
directly in the calling context.
If the flag is set, indicating the upcall is an isr context, the
transport mandates a transition to a workqueue. The workqueue assigned
to the queue is used for the context.
Updated lpfc for flags
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers/nvme/target/fcloop.c')
| -rw-r--r-- | drivers/nvme/target/fcloop.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c index 4e8e6a22bce1..a5cdeca39013 100644 --- a/drivers/nvme/target/fcloop.c +++ b/drivers/nvme/target/fcloop.c @@ -575,8 +575,9 @@ struct nvmet_fc_target_template tgttemplate = { .max_dif_sgl_segments = FCLOOP_SGL_SEGS, .dma_boundary = FCLOOP_DMABOUND_4G, /* optional features */ - .target_features = NVMET_FCTGTFEAT_READDATA_RSP | - NVMET_FCTGTFEAT_NEEDS_CMD_CPUSCHED, + .target_features = NVMET_FCTGTFEAT_CMD_IN_ISR | + NVMET_FCTGTFEAT_NEEDS_CMD_CPUSCHED | + NVMET_FCTGTFEAT_OPDONE_IN_ISR, /* sizes of additional private data for data structures */ .target_priv_sz = sizeof(struct fcloop_tport), }; |