From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, kuba@kernel.org, gospo@broadcom.com
Subject: [PATCH net-next 07/11] bnxt: change receive ring space parameters
Date: Sun, 20 Mar 2022 02:57:49 -0400 [thread overview]
Message-ID: <1647759473-2414-8-git-send-email-michael.chan@broadcom.com> (raw)
In-Reply-To: <1647759473-2414-1-git-send-email-michael.chan@broadcom.com>
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From: Andy Gospodarek <gospo@broadcom.com>
Modify ring header data split and jumbo parameters to account
for the fact that the design for XDP multibuffer puts close to
the first 4k of data in a page and the remaining portions of
the packet go in the aggregation ring.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 44 +++++++++++++++--------
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 +
2 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 05f4b3fbf2e3..b635b7ce6ba3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -56,6 +56,7 @@
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <net/page_pool.h>
+#include <linux/align.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
@@ -1933,11 +1934,13 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
}
if (agg_bufs) {
- skb = bnxt_rx_agg_pages_skb(bp, cpr, skb, cp_cons, agg_bufs, false);
- if (!skb) {
- cpr->sw_stats.rx.rx_oom_discards += 1;
- rc = -ENOMEM;
- goto next_rx;
+ if (!xdp_active) {
+ skb = bnxt_rx_agg_pages_skb(bp, cpr, skb, cp_cons, agg_bufs, false);
+ if (!skb) {
+ cpr->sw_stats.rx.rx_oom_discards += 1;
+ rc = -ENOMEM;
+ goto next_rx;
+ }
}
}
@@ -3853,7 +3856,7 @@ void bnxt_set_ring_params(struct bnxt *bp)
/* 8 for CRC and VLAN */
rx_size = SKB_DATA_ALIGN(bp->dev->mtu + ETH_HLEN + NET_IP_ALIGN + 8);
- rx_space = rx_size + NET_SKB_PAD +
+ rx_space = rx_size + ALIGN(max(NET_SKB_PAD, XDP_PACKET_HEADROOM), 8) +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
bp->rx_copy_thresh = BNXT_RX_COPY_THRESH;
@@ -3894,9 +3897,17 @@ void bnxt_set_ring_params(struct bnxt *bp)
}
bp->rx_agg_ring_size = agg_ring_size;
bp->rx_agg_ring_mask = (bp->rx_agg_nr_pages * RX_DESC_CNT) - 1;
- rx_size = SKB_DATA_ALIGN(BNXT_RX_COPY_THRESH + NET_IP_ALIGN);
- rx_space = rx_size + NET_SKB_PAD +
- SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+
+ if (BNXT_RX_PAGE_MODE(bp)) {
+ rx_space = PAGE_SIZE;
+ rx_size = rx_space - SKB_DATA_ALIGN(ETH_HLEN + NET_IP_ALIGN + 8) -
+ ALIGN(max(NET_SKB_PAD, XDP_PACKET_HEADROOM), 8) -
+ 2 * SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+ } else {
+ rx_size = SKB_DATA_ALIGN(BNXT_RX_COPY_THRESH + NET_IP_ALIGN);
+ rx_space = rx_size + NET_SKB_PAD +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+ }
}
bp->rx_buf_use_size = rx_size;
@@ -5286,12 +5297,15 @@ static int bnxt_hwrm_vnic_set_hds(struct bnxt *bp, u16 vnic_id)
if (rc)
return rc;
- req->flags = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_JUMBO_PLACEMENT |
- VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV4 |
- VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV6);
- req->enables =
- cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_JUMBO_THRESH_VALID |
- VNIC_PLCMODES_CFG_REQ_ENABLES_HDS_THRESHOLD_VALID);
+ req->flags = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_JUMBO_PLACEMENT);
+ req->enables = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_JUMBO_THRESH_VALID);
+
+ if (BNXT_RX_PAGE_MODE(bp) && !BNXT_RX_JUMBO_MODE(bp)) {
+ req->flags |= cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV4 |
+ VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV6);
+ req->enables |=
+ cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_HDS_THRESHOLD_VALID);
+ }
/* thresholds not implemented in firmware yet */
req->jumbo_thresh = cpu_to_le16(bp->rx_copy_thresh);
req->hds_threshold = cpu_to_le16(bp->rx_copy_thresh);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 447a9406b8a2..9e2dabb58519 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1814,6 +1814,7 @@ struct bnxt {
#define BNXT_SUPPORTS_TPA(bp) (!BNXT_CHIP_TYPE_NITRO_A0(bp) && \
(!((bp)->flags & BNXT_FLAG_CHIP_P5) || \
(bp)->max_tpa_v2) && !is_kdump_kernel())
+#define BNXT_RX_JUMBO_MODE(bp) ((bp)->flags & BNXT_FLAG_JUMBO)
#define BNXT_CHIP_SR2(bp) \
((bp)->chip_num == CHIP_NUM_58818)
--
2.18.1
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next prev parent reply other threads:[~2022-03-20 6:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-20 6:57 [PATCH net-next 00/11] bnxt: Support XDP multi buffer Michael Chan
2022-03-20 6:57 ` [PATCH net-next 01/11] bnxt: refactor bnxt_rx_xdp to separate xdp_init_buff/xdp_prepare_buff Michael Chan
2022-03-20 9:47 ` kernel test robot
2022-03-20 6:57 ` [PATCH net-next 02/11] bnxt: add flag to denote that an xdp program is currently attached Michael Chan
2022-03-20 6:57 ` [PATCH net-next 03/11] bnxt: refactor bnxt_rx_pages operate on skb_shared_info Michael Chan
2022-03-20 6:57 ` [PATCH net-next 04/11] bnxt: rename bnxt_rx_pages to bnxt_rx_agg_pages_skb Michael Chan
2022-03-20 6:57 ` [PATCH net-next 05/11] bnxt: adding bnxt_rx_agg_pages_xdp for aggregated xdp Michael Chan
2022-03-20 6:57 ` [PATCH net-next 06/11] bnxt: set xdp_buff pfmemalloc flag if needed Michael Chan
2022-03-20 6:57 ` Michael Chan [this message]
2022-03-20 6:57 ` [PATCH net-next 08/11] bnxt: add page_pool support for aggregation ring when using xdp Michael Chan
2022-03-20 6:57 ` [PATCH net-next 09/11] bnxt: adding bnxt_xdp_build_skb to build skb from multibuffer xdp_buff Michael Chan
2022-03-20 6:57 ` [PATCH net-next 10/11] bnxt: support transmit and free of aggregation buffers Michael Chan
2022-03-20 10:47 ` kernel test robot
2022-03-20 6:57 ` [PATCH net-next 11/11] bnxt: XDP multibuffer enablement Michael Chan
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