diff mbox series

[net-next,v2,07/11] bnxt: change receive ring space parameters

Message ID 1647806284-8529-8-git-send-email-michael.chan@broadcom.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series bnxt: Support XDP multi buffer | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/cc_maintainers warning 6 maintainers not CCed: daniel@iogearbox.net ast@kernel.org hawk@kernel.org john.fastabend@gmail.com pabeni@redhat.com bpf@vger.kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/checkpatch warning WARNING: line length of 83 exceeds 80 columns WARNING: line length of 85 exceeds 80 columns WARNING: line length of 87 exceeds 80 columns WARNING: line length of 90 exceeds 80 columns WARNING: line length of 92 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Michael Chan March 20, 2022, 7:58 p.m. UTC 
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 mbox series

Patch

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)