All of lore.kernel.org
 help / color / mirror / Atom feed
From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, kuba@kernel.org, gospo@broadcom.com,
	bpf@vger.kernel.org, john.fastabend@gmail.com, toke@redhat.com,
	lorenzo@kernel.org, ast@kernel.org, daniel@iogearbox.net,
	echaudro@redhat.com, pabeni@redhat.com
Subject: [PATCH net-next v3 07/11] bnxt: change receive ring space parameters
Date: Tue,  5 Apr 2022 22:53:49 -0400	[thread overview]
Message-ID: <1649213633-7662-8-git-send-email-michael.chan@broadcom.com> (raw)
In-Reply-To: <1649213633-7662-1-git-send-email-michael.chan@broadcom.com>

[-- Attachment #1: Type: text/plain, Size: 4133 bytes --]

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.

v3: Simplified code around initial buffer size calculation

Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 42 +++++++++++++++--------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  1 +
 2 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6e1d43410e8c..2a919905f256 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;
+			}
 		}
 	}
 
@@ -3854,7 +3857,7 @@ 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;
@@ -3895,9 +3898,15 @@ 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 = BNXT_PAGE_MODE_BUF_SIZE;
+			rx_size = BNXT_MAX_PAGE_MODE_MTU;
+		} 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;
@@ -5287,12 +5296,15 @@ 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 0f35459d5206..319d6851eecc 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1819,6 +1819,7 @@ 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


[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4209 bytes --]

  parent reply	other threads:[~2022-04-06 16:33 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-06  2:53 [PATCH net-next v3 00/11] bnxt: Support XDP multi buffer Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 01/11] bnxt: refactor bnxt_rx_xdp to separate xdp_init_buff/xdp_prepare_buff Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 02/11] bnxt: add flag to denote that an xdp program is currently attached Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 03/11] bnxt: refactor bnxt_rx_pages operate on skb_shared_info Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 04/11] bnxt: rename bnxt_rx_pages to bnxt_rx_agg_pages_skb Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 05/11] bnxt: adding bnxt_rx_agg_pages_xdp for aggregated xdp Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 06/11] bnxt: set xdp_buff pfmemalloc flag if needed Michael Chan
2022-04-06  2:53 ` Michael Chan [this message]
2022-04-06  2:53 ` [PATCH net-next v3 08/11] bnxt: add page_pool support for aggregation ring when using xdp Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 09/11] bnxt: adding bnxt_xdp_build_skb to build skb from multibuffer xdp_buff Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 10/11] bnxt: support transmit and free of aggregation buffers Michael Chan
2022-04-06  2:53 ` [PATCH net-next v3 11/11] bnxt: XDP multibuffer enablement Michael Chan
2022-04-06 12:55 ` [PATCH net-next v3 00/11] bnxt: Support XDP multi buffer David Miller
2022-04-07  2:48   ` Michael Chan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1649213633-7662-8-git-send-email-michael.chan@broadcom.com \
    --to=michael.chan@broadcom.com \
    --cc=ast@kernel.org \
    --cc=bpf@vger.kernel.org \
    --cc=daniel@iogearbox.net \
    --cc=davem@davemloft.net \
    --cc=echaudro@redhat.com \
    --cc=gospo@broadcom.com \
    --cc=john.fastabend@gmail.com \
    --cc=kuba@kernel.org \
    --cc=lorenzo@kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pabeni@redhat.com \
    --cc=toke@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.