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nvme: cache struct nvme_ctrl reference to struct nvme_request 

We will need to reference the controller in the setup and completion
time for tracing and future traffic based keep alive support.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
hifive-unleashed-5.1
Sagi Grimberg 2018-06-29 16:50:00 -06:00 committed by Christoph Hellwig
parent 202093848c
commit 59e29ce66b
5 changed files with 6 additions and 0 deletions
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1
drivers/nvme/host/fc.c
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@ -1737,6 +1737,7 @@ nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq,
int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0;
struct nvme_fc_queue *queue = &ctrl->queues[queue_idx];
nvme_req(rq)->ctrl = &ctrl->ctrl;
return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++);
}

1
drivers/nvme/host/nvme.h
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@ -102,6 +102,7 @@ struct nvme_request {
u8 retries;
u8 flags;
u16 status;
struct nvme_ctrl *ctrl;
};
/*

2
drivers/nvme/host/pci.c
View File

@ -418,6 +418,8 @@ static int nvme_init_request(struct blk_mq_tag_set *set, struct request *req,
BUG_ON(!nvmeq);
iod->nvmeq = nvmeq;
nvme_req(req)->ctrl = &dev->ctrl;
return 0;
}

1
drivers/nvme/host/rdma.c
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@ -288,6 +288,7 @@ static int nvme_rdma_init_request(struct blk_mq_tag_set *set,
struct ib_device *ibdev = dev->dev;
int ret;
nvme_req(rq)->ctrl = &ctrl->ctrl;
ret = nvme_rdma_alloc_qe(ibdev, &req->sqe, sizeof(struct nvme_command),
DMA_TO_DEVICE);
if (ret)

1
drivers/nvme/target/loop.c
View File

@ -227,6 +227,7 @@ static int nvme_loop_init_request(struct blk_mq_tag_set *set,
{
struct nvme_loop_ctrl *ctrl = set->driver_data;
nvme_req(req)->ctrl = &ctrl->ctrl;
return nvme_loop_init_iod(ctrl, blk_mq_rq_to_pdu(req),
(set == &ctrl->tag_set) ? hctx_idx + 1 : 0);
}