From: Harman Kalra <hka...@marvell.com>
An errata exists whereby, in certain cases NIX may use an
incorrect QINT_IDX for SQ interrupts. As a result, the
interrupt may not be delivered to software, or may not be
associated with the correct SQ.
When NIX uses an incorrect QINT_IDX :
1. NIX_LF_QINT(0..63)_CNT[COUNT] will be incremented for
incorrect QINT.
2. NIX_LF_QINT(0..63)_INT[INTR] will be set for incorrect
QINT.
Signed-off-by: Harman Kalra <hka...@marvell.com>
Acked-by: Jerin Jacob <jer...@marvell.com>
---
drivers/common/cnxk/roc_nix_queue.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/common/cnxk/roc_nix_queue.c
b/drivers/common/cnxk/roc_nix_queue.c
index c638cd4..80e1c9f 100644
--- a/drivers/common/cnxk/roc_nix_queue.c
+++ b/drivers/common/cnxk/roc_nix_queue.c
@@ -690,7 +690,11 @@ sq_cn9k_init(struct nix *nix, struct roc_nix_sq *sq,
uint32_t rr_quantum,
aq->sq.sq_int_ena |= BIT(NIX_SQINT_MNQ_ERR);
/* Many to one reduction */
- aq->sq.qint_idx = sq->qid % nix->qints;
+ /* Assigning QINT 0 to all the SQs, an errata exists where NIXTX can
+ * send incorrect QINT_IDX when reporting queue interrupt (QINT). This
+ * might result in software missing the interrupt.
+ */
+ aq->sq.qint_idx = 0;
}
static int
@@ -789,8 +793,11 @@ sq_init(struct nix *nix, struct roc_nix_sq *sq, uint32_t
rr_quantum,
aq->sq.sq_int_ena |= BIT(NIX_SQINT_SEND_ERR);
aq->sq.sq_int_ena |= BIT(NIX_SQINT_MNQ_ERR);
- /* Many to one reduction */
- aq->sq.qint_idx = sq->qid % nix->qints;
+ /* Assigning QINT 0 to all the SQs, an errata exists where NIXTX can
+ * send incorrect QINT_IDX when reporting queue interrupt (QINT). This
+ * might result in software missing the interrupt.
+ */
+ aq->sq.qint_idx = 0;
}
static int
--
2.8.4
