[PATCH v2 3/7] dmaengine: idxd: move interrupt handle assignment
STALE1777d
LANDED: 2 (2M)
From: Dave Jiang <dave.jiang@intel.com>
Date: 2021-10-26 21:36:19
Subsystem:
dma generic offload engine subsystem, intel idxd driver, the rest · Maintainers:
Vinod Koul, Vinicius Costa Gomes, Linus Torvalds
1 review trailer; landed in mainline as eb0cf33a91b4 on 2021-11-22.
In preparation of supporting interrupt handle revoke event, move the interrupt handle assignment to right before the descriptor to be submitted. This allows the interrupt handle revoke logic to assign the latest interrupt handle on submission. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- drivers/dma/idxd/submit.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index d4688f369bc2..df02c5c814e7 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c@@ -21,15 +21,6 @@ static struct idxd_desc *__get_desc(struct idxd_wq *wq, int idx, int cpu) if (device_pasid_enabled(idxd)) desc->hw->pasid = idxd->pasid; - /* - * On host, MSIX vecotr 0 is used for misc interrupt. Therefore when we match - * vector 1:1 to the WQ id, we need to add 1 - */ - if (wq->ie->int_handle == INVALID_INT_HANDLE) - desc->hw->int_handle = wq->id + 1; - else - desc->hw->int_handle = wq->ie->int_handle; - return desc; }
@@ -160,6 +151,11 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc) */ if (desc->hw->flags & IDXD_OP_FLAG_RCI) { ie = wq->ie; + if (ie->int_handle == INVALID_INT_HANDLE) + desc->hw->int_handle = ie->id; + else + desc->hw->int_handle = ie->int_handle; + llist_add(&desc->llnode, &ie->pending_llist); }