[dpdk-dev] [PATCH 2/3] net/sfc: support runtime VI window size

[Andrew Rybchenko]

Medford2 uses a configurable VI window size, and requires
updates to register accesses to use a runtime VI window size
rather than the *_STEP register constants used for earlier
controllers.

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
Reviewed-by: Andy Moreton <amoreton at solarflare.com>
---
 drivers/net/sfc/sfc_dp_rx.h   | 2 ++
 drivers/net/sfc/sfc_dp_tx.h   | 2 ++
 drivers/net/sfc/sfc_ef10_rx.c | 2 +-
 drivers/net/sfc/sfc_ef10_tx.c | 2 +-
 drivers/net/sfc/sfc_rx.c      | 1 +
 drivers/net/sfc/sfc_tx.c      | 1 +
 6 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/sfc/sfc_dp_rx.h b/drivers/net/sfc/sfc_dp_rx.h
index be725dc..cc9e7c4 100644
--- a/drivers/net/sfc/sfc_dp_rx.h
+++ b/drivers/net/sfc/sfc_dp_rx.h
@@ -78,6 +78,8 @@ struct sfc_dp_rx_qcreate_info {
 	 * doorbell
 	 */
 	volatile void		*mem_bar;
+	/** VI window size shift */
+	unsigned int		vi_window_shift;
 };
 
 /**
diff --git a/drivers/net/sfc/sfc_dp_tx.h b/drivers/net/sfc/sfc_dp_tx.h
index 0c1aad9..a075612 100644
--- a/drivers/net/sfc/sfc_dp_tx.h
+++ b/drivers/net/sfc/sfc_dp_tx.h
@@ -57,6 +57,8 @@ struct sfc_dp_tx_qcreate_info {
 	unsigned int		hw_index;
 	/** Virtual address of the memory-mapped BAR to push Tx doorbell */
 	volatile void		*mem_bar;
+	/** VI window size shift */
+	unsigned int		vi_window_shift;
 };
 
 /**
diff --git a/drivers/net/sfc/sfc_ef10_rx.c b/drivers/net/sfc/sfc_ef10_rx.c
index f31a7e0..0c74926 100644
--- a/drivers/net/sfc/sfc_ef10_rx.c
+++ b/drivers/net/sfc/sfc_ef10_rx.c
@@ -726,7 +726,7 @@ sfc_ef10_rx_qcreate(uint16_t port_id, uint16_t queue_id,
 	rxq->rxq_hw_ring = info->rxq_hw_ring;
 	rxq->doorbell = (volatile uint8_t *)info->mem_bar +
 			ER_DZ_RX_DESC_UPD_REG_OFST +
-			info->hw_index * ER_DZ_RX_DESC_UPD_REG_STEP;
+			(info->hw_index << info->vi_window_shift);
 
 	*dp_rxqp = &rxq->dp;
 	return 0;
diff --git a/drivers/net/sfc/sfc_ef10_tx.c b/drivers/net/sfc/sfc_ef10_tx.c
index 1238797..d0daa3b 100644
--- a/drivers/net/sfc/sfc_ef10_tx.c
+++ b/drivers/net/sfc/sfc_ef10_tx.c
@@ -531,7 +531,7 @@ sfc_ef10_tx_qcreate(uint16_t port_id, uint16_t queue_id,
 	txq->txq_hw_ring = info->txq_hw_ring;
 	txq->doorbell = (volatile uint8_t *)info->mem_bar +
 			ER_DZ_TX_DESC_UPD_REG_OFST +
-			info->hw_index * ER_DZ_TX_DESC_UPD_REG_STEP;
+			(info->hw_index << info->vi_window_shift);
 	txq->evq_hw_ring = info->evq_hw_ring;
 
 	*dp_txqp = &txq->dp;
diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index abc53fb..9e030e2 100644
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -1079,6 +1079,7 @@ sfc_rx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
 	info.evq_hw_ring = evq->mem.esm_base;
 	info.hw_index = rxq->hw_index;
 	info.mem_bar = sa->mem_bar.esb_base;
+	info.vi_window_shift = encp->enc_vi_window_shift;
 
 	rc = sa->dp_rx->qcreate(sa->eth_dev->data->port_id, sw_index,
 				&RTE_ETH_DEV_TO_PCI(sa->eth_dev)->addr,
diff --git a/drivers/net/sfc/sfc_tx.c b/drivers/net/sfc/sfc_tx.c
index 757b03b..4dc1590 100644
--- a/drivers/net/sfc/sfc_tx.c
+++ b/drivers/net/sfc/sfc_tx.c
@@ -229,6 +229,7 @@ sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
 	info.evq_hw_ring = evq->mem.esm_base;
 	info.hw_index = txq->hw_index;
 	info.mem_bar = sa->mem_bar.esb_base;
+	info.vi_window_shift = encp->enc_vi_window_shift;
 
 	rc = sa->dp_tx->qcreate(sa->eth_dev->data->port_id, sw_index,
 				&RTE_ETH_DEV_TO_PCI(sa->eth_dev)->addr,
-- 
2.7.4