[V4,10/10] net/bnxt: fix to cap max rings to minimum of compl rings and stat contexts
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Commit Message
From: Somnath Kotur <somnath.kotur@broadcom.com>
Max Tx rings count could be lesser than max Rx rings in some
cases, so take this into account as well.
Account for stat contexts available(one for each ring) along with
no: of completion rings(one for each ring) to cap the max no: of
Tx /Rx rings that can be possibly created.
Fixes: f03e66cb ("net/bnxt: limit queue count for NS3/Stingray devices")
Cc: stable@dpdk.org
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
---
drivers/net/bnxt/bnxt.h | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
@@ -622,12 +622,19 @@ struct bnxt {
uint16_t max_tx_rings;
uint16_t max_rx_rings;
#define MAX_STINGRAY_RINGS 128U
-#define BNXT_MAX_RINGS(bp) \
+/* For sake of symmetry, max Tx rings == max Rx rings, one stat ctx for each */
+#define BNXT_MAX_RX_RINGS(bp) \
(BNXT_STINGRAY(bp) ? RTE_MIN(RTE_MIN(bp->max_rx_rings, \
MAX_STINGRAY_RINGS), \
- bp->max_stat_ctx) : \
- RTE_MIN(bp->max_rx_rings, bp->max_stat_ctx))
+ bp->max_stat_ctx / 2U) : \
+ RTE_MIN(bp->max_rx_rings, \
+ bp->max_stat_ctx / 2U))
+#define BNXT_MAX_TX_RINGS(bp) \
+ (RTE_MIN((bp)->max_tx_rings, BNXT_MAX_RX_RINGS(bp)))
+#define BNXT_MAX_RINGS(bp) \
+ (RTE_MIN((((bp)->max_cp_rings - BNXT_NUM_ASYNC_CPR(bp)) / 2U), \
+ BNXT_MAX_TX_RINGS(bp)))
uint16_t max_nq_rings;
uint16_t max_l2_ctx;
uint16_t max_rx_em_flows;