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nvme: remove handling of multiple AEN requests 

The driver can handle tracking only one AEN request, so this patch
removes handling for multiple ones.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart  <james.smart@broadcom.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Keith Busch 2017-11-07 15:13:12 -07:00 committed by Jens Axboe
parent 08e1507544
commit ad22c355b7
6 changed files with 11 additions and 40 deletions
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28
drivers/nvme/host/core.c
View File

@ -2670,15 +2670,7 @@ static void nvme_async_event_work(struct work_struct *work)
struct nvme_ctrl *ctrl =
container_of(work, struct nvme_ctrl, async_event_work);
spin_lock_irq(&ctrl->lock);
while (ctrl->state == NVME_CTRL_LIVE && ctrl->event_limit > 0) {
int aer_idx = --ctrl->event_limit;
spin_unlock_irq(&ctrl->lock);
ctrl->ops->submit_async_event(ctrl, aer_idx);
spin_lock_irq(&ctrl->lock);
}
spin_unlock_irq(&ctrl->lock);
ctrl->ops->submit_async_event(ctrl);
}
static bool nvme_ctrl_pp_status(struct nvme_ctrl *ctrl)
@ -2745,22 +2737,8 @@ void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
union nvme_result *res)
{
u32 result = le32_to_cpu(res->u32);
bool done = true;
switch (le16_to_cpu(status) >> 1) {
case NVME_SC_SUCCESS:
done = false;
/*FALLTHRU*/
case NVME_SC_ABORT_REQ:
++ctrl->event_limit;
if (ctrl->state == NVME_CTRL_LIVE)
queue_work(nvme_wq, &ctrl->async_event_work);
break;
default:
break;
}
if (done)
if (le16_to_cpu(status) >> 1 != NVME_SC_SUCCESS)
return;
switch (result & 0xff07) {
@ -2774,12 +2752,12 @@ void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
default:
dev_warn(ctrl->device, "async event result %08x\n", result);
}
queue_work(nvme_wq, &ctrl->async_event_work);
}
EXPORT_SYMBOL_GPL(nvme_complete_async_event);
void nvme_queue_async_events(struct nvme_ctrl *ctrl)
{
ctrl->event_limit = NVME_NR_AEN_COMMANDS;
queue_work(nvme_wq, &ctrl->async_event_work);
}
EXPORT_SYMBOL_GPL(nvme_queue_async_events);

9
drivers/nvme/host/fc.c
View File

@ -2382,7 +2382,7 @@ nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
}
static void
nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
nvme_fc_submit_async_event(struct nvme_ctrl *arg)
{
struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg);
struct nvme_fc_fcp_op *aen_op;
@ -2390,9 +2390,6 @@ nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
bool terminating = false;
blk_status_t ret;
if (aer_idx > NVME_NR_AEN_COMMANDS)
return;
spin_lock_irqsave(&ctrl->lock, flags);
if (ctrl->flags & FCCTRL_TERMIO)
terminating = true;
@ -2401,13 +2398,13 @@ nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
if (terminating)
return;
aen_op = &ctrl->aen_ops[aer_idx];
aen_op = &ctrl->aen_ops[0];
ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0,
NVMEFC_FCP_NODATA);
if (ret)
dev_err(ctrl->ctrl.device,
"failed async event work [%d]\n", aer_idx);
"failed async event work\n");
}
static void

3
drivers/nvme/host/nvme.h
View File

@ -162,7 +162,6 @@ struct nvme_ctrl {
u16 nssa;
u16 nr_streams;
atomic_t abort_limit;
u8 event_limit;
u8 vwc;
u32 vs;
u32 sgls;
@ -237,7 +236,7 @@ struct nvme_ctrl_ops {
int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
void (*free_ctrl)(struct nvme_ctrl *ctrl);
void (*submit_async_event)(struct nvme_ctrl *ctrl, int aer_idx);
void (*submit_async_event)(struct nvme_ctrl *ctrl);
void (*delete_ctrl)(struct nvme_ctrl *ctrl);
int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
int (*reinit_request)(void *data, struct request *rq);

4
drivers/nvme/host/pci.c
View File

@ -1043,7 +1043,7 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
return __nvme_poll(nvmeq, tag);
}
static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx)
static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl)
{
struct nvme_dev *dev = to_nvme_dev(ctrl);
struct nvme_queue *nvmeq = dev->queues[0];
@ -1051,7 +1051,7 @@ static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx)
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_async_event;
c.common.command_id = NVME_AQ_BLK_MQ_DEPTH + aer_idx;
c.common.command_id = NVME_AQ_BLK_MQ_DEPTH;
spin_lock_irq(&nvmeq->q_lock);
__nvme_submit_cmd(nvmeq, &c);

5
drivers/nvme/host/rdma.c
View File

@ -1293,7 +1293,7 @@ static struct blk_mq_tags *nvme_rdma_tagset(struct nvme_rdma_queue *queue)
return queue->ctrl->tag_set.tags[queue_idx - 1];
}
static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg)
{
struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(arg);
struct nvme_rdma_queue *queue = &ctrl->queues[0];
@ -1303,9 +1303,6 @@ static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
struct ib_sge sge;
int ret;
if (WARN_ON_ONCE(aer_idx != 0))
return;
ib_dma_sync_single_for_cpu(dev, sqe->dma, sizeof(*cmd), DMA_TO_DEVICE);
memset(cmd, 0, sizeof(*cmd));

2
drivers/nvme/target/loop.c
View File

@ -184,7 +184,7 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_STS_OK;
}
static void nvme_loop_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
static void nvme_loop_submit_async_event(struct nvme_ctrl *arg)
{
struct nvme_loop_ctrl *ctrl = to_loop_ctrl(arg);
struct nvme_loop_queue *queue = &ctrl->queues[0];