[PATCH net-next v1 5/8] net: dsa: realtek: rtl8365mb: store the egress queue count per chip
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From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: 2026-10-02 11:58:58
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Subsystem:
networking drivers, networking [dsa], realtek rtl83xx smi dsa router chips, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Linus Walleij, Luiz Angelo Daros de Luca, Linus Torvalds
Store the number of egress queues in the per-chip info structure and advertise it through ds->num_tx_queues, following the ksz driver (struct ksz_chip_data.num_tx_queues). The queue count is a per-chip hardware property, and this driver supports several chips of the rtl8367c family. All currently-supported chips expose eight queues, but keeping the count in chip_info lets the QoS code that follows program the priority-to-queue map via the ieee8021q helpers for whatever queue count a chip carries, so the 802.1Q collapse is correct rather than hard-coded to eight. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- drivers/net/dsa/realtek/rtl8365mb_main.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/net/dsa/realtek/rtl8365mb_main.c b/drivers/net/dsa/realtek/rtl8365mb_main.c
index 87ec924a0611..0924d31790e0 100644
--- a/drivers/net/dsa/realtek/rtl8365mb_main.c
+++ b/drivers/net/dsa/realtek/rtl8365mb_main.c@@ -708,6 +708,7 @@ struct rtl8365mb_extint { * @extints: available external interfaces * @jam_table: chip-specific initialization jam table * @jam_size: size of the chip's jam table + * @num_tx_queues: number of egress queues exposed by the chip * * These data are specific to a given chip in the family of switches supported * by this driver. When adding support for another chip in the family, a new
@@ -720,6 +721,7 @@ struct rtl8365mb_chip_info { const struct rtl8365mb_extint extints[RTL8365MB_MAX_NUM_EXTINTS]; const struct rtl8365mb_jam_tbl_entry *jam_table; size_t jam_size; + unsigned int num_tx_queues; }; /* Chip info for each supported switch in the family */
@@ -735,6 +737,7 @@ static const struct rtl8365mb_chip_info rtl8365mb_chip_infos[] = { }, .jam_table = rtl8365mb_init_jam_8365mb_vc, .jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc), + .num_tx_queues = 8, }, { .name = "RTL8367S",
@@ -747,6 +750,7 @@ static const struct rtl8365mb_chip_info rtl8365mb_chip_infos[] = { }, .jam_table = rtl8365mb_init_jam_8365mb_vc, .jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc), + .num_tx_queues = 8, }, { .name = "RTL8367SB",
@@ -761,6 +765,7 @@ static const struct rtl8365mb_chip_info rtl8365mb_chip_infos[] = { }, .jam_table = rtl8365mb_init_jam_8365mb_vc, .jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc), + .num_tx_queues = 8, }, { .name = "RTL8367RB-VB",
@@ -774,6 +779,7 @@ static const struct rtl8365mb_chip_info rtl8365mb_chip_infos[] = { }, .jam_table = rtl8365mb_init_jam_8365mb_vc, .jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc), + .num_tx_queues = 8, }, };
@@ -3262,6 +3268,12 @@ static int rtl8365mb_setup(struct dsa_switch *ds) goto out_teardown_irq; } + /* The rtl8367c family this driver supports exposes a fixed number of + * egress queues per chip; advertise that count to DSA so the QoS code + * programs the priority-to-queue map for the right number of queues. + */ + ds->num_tx_queues = mb->chip_info->num_tx_queues; + /* Start statistics counter polling */ ret = rtl8365mb_stats_setup(priv); if (ret) {
--
2.47.3