diff mbox series

[v2,net-next,7/8] ionic: Use an u16 for rx_copybreak

Message ID 20240619003257.6138-8-shannon.nelson@amd.com (mailing list archive)
State Accepted
Commit f703d56c03050b5d8f9bea6842569798b5407386
Delegated to: Netdev Maintainers
Headers show
Series ionic: rework fix for doorbell miss | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: ahmed.zaki@intel.com
netdev/build_clang success Errors and warnings before: 849 this patch: 849
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 849 this patch: 849
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 50 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-06-19--21-00 (tests: 657)

Commit Message

Nelson, Shannon June 19, 2024, 12:32 a.m. UTC 
From: Brett Creeley <brett.creeley@amd.com>

We only support (u16)-1 size for rx_copybreak, so we can reduce the
field size and move a couple other fields around to save a little
space in the ionic_lif struct.

Before:
	/* size: 17440, cachelines: 273, members: 56 */
	/* sum members: 17403, holes: 9, sum holes: 37 */
	/* last cacheline: 32 bytes */

After:
	/* size: 17424, cachelines: 273, members: 56 */
	/* sum members: 17401, holes: 7, sum holes: 23 */
	/* last cacheline: 16 bytes */

Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
---
 drivers/net/ethernet/pensando/ionic/ionic_ethtool.c | 11 ++++++++++-
 drivers/net/ethernet/pensando/ionic/ionic_lif.h     |  6 +++---
 2 files changed, 13 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 91183965a6b7..185a03514ae3 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -11,6 +11,8 @@ 
 #include "ionic_ethtool.h"
 #include "ionic_stats.h"
 
+#define IONIC_MAX_RX_COPYBREAK	min(U16_MAX, IONIC_MAX_BUF_LEN)
+
 static void ionic_get_stats_strings(struct ionic_lif *lif, u8 *buf)
 {
 	u32 i;
@@ -872,10 +874,17 @@  static int ionic_set_tunable(struct net_device *dev,
 			     const void *data)
 {
 	struct ionic_lif *lif = netdev_priv(dev);
+	u32 rx_copybreak;
 
 	switch (tuna->id) {
 	case ETHTOOL_RX_COPYBREAK:
-		lif->rx_copybreak = *(u32 *)data;
+		rx_copybreak = *(u32 *)data;
+		if (rx_copybreak > IONIC_MAX_RX_COPYBREAK) {
+			netdev_err(dev, "Max supported rx_copybreak size: %u\n",
+				   IONIC_MAX_RX_COPYBREAK);
+			return -EINVAL;
+		}
+		lif->rx_copybreak = (u16)rx_copybreak;
 		break;
 	default:
 		return -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 40b28d0b858f..5bd501355670 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -206,10 +206,10 @@  struct ionic_lif {
 	unsigned int nxqs;
 	unsigned int ntxq_descs;
 	unsigned int nrxq_descs;
-	u32 rx_copybreak;
 	u64 rxq_features;
-	u16 rx_mode;
 	u64 hw_features;
+	u16 rx_copybreak;
+	u16 rx_mode;
 	bool registered;
 	u16 lif_type;
 	unsigned int link_down_count;
@@ -225,11 +225,11 @@  struct ionic_lif {
 	u32 info_sz;
 	struct ionic_qtype_info qtype_info[IONIC_QTYPE_MAX];
 
-	u16 rss_types;
 	u8 rss_hash_key[IONIC_RSS_HASH_KEY_SIZE];
 	u8 *rss_ind_tbl;
 	dma_addr_t rss_ind_tbl_pa;
 	u32 rss_ind_tbl_sz;
+	u16 rss_types;
 
 	struct ionic_rx_filters rx_filters;
 	u32 rx_coalesce_usecs;		/* what the user asked for */