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Message-ID:
<TYCPR01MB84370EDD86F8EA76F79F1DE898D52@TYCPR01MB8437.jpnprd01.prod.outlook.com>
Date: Sat, 8 Mar 2025 02:18:05 +0800
From: Shengyu Qu <wiagn233@...look.com>
To: nbd@....name, lorenzo@...nel.org, ryder.lee@...iatek.com,
shayne.chen@...iatek.com, sean.wang@...iatek.com, pkshih@...ltek.com,
johannes@...solutions.net, matthias.bgg@...il.com,
angelogioacchino.delregno@...labora.com, miriam.rachel.korenblit@...el.com,
michael-cy.lee@...iatek.com, sujuan.chen@...iatek.com,
benjamin-jw.lin@...iatek.com, emmanuel.grumbach@...el.com,
howard-yh.hsu@...iatek.com, nicolas.cavallari@...en-communications.fr,
chui-hao.chiu@...iatek.com, quic_adisi@...cinc.com, deren.wu@...iatek.com,
gustavoars@...nel.org, bo.jiao@...iatek.com, linux-wireless@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Cc: wiagn233@...look.com
Subject: Re: [PATCH v9] wifi: mt76: mt7915: add wds support when wed is
enabled
Seems I forgot to add the changelist:
Changes since v1:
- Drop duplicate setting in mmio
- Reduce the patch size by redefining mt76_wcid_alloc
Changes since v2:
- Rework wds wcid getting flow
Changes since v3:
- Rebase to next-20240703
- Sync with downstream patch
Changes since v4:
- Rebase to next-20240802
Changes since v5:
- Fixed build test error reported by robot
- Rebase to next-20240805
Changes since v6:
- Fix potential race conditions on tx/rx packets during the transition
- Rebase to Felix's newest codebase
Changes since v7:
- Fix build fail
Changes since v8:
- Changed code as Shih advised
Best regards,
Shengyu
在 2025/3/8 02:13, Shengyu Qu 写道:
> The current WED only supports 256 wcid, whereas mt7986 can support up to
> 512 entries, so firmware provides a rule to get sta_info by DA when wcid
> is set to 0x3ff by txd. Also, WED provides a register to overwrite txd
> wcid, that is, wcid[9:8] can be overwritten by 0x3 and wcid[7:0] is set
> to 0xff by host driver.
>
> However, firmware is unable to get sta_info from DA as DA != RA for
> 4addr cases, so firmware and wifi host driver both use wcid (256 - 271)
> and (768 ~ 783) for sync up to get correct sta_info.
>
> Currently WDS+WED config is completely broken on MT7986/7981 devices if
> without this patch.
>
> Tested-by: Sujuan Chen <sujuan.chen@...iatek.com>
> Co-developed-by: Bo Jiao <bo.jiao@...iatek.com>
> Signed-off-by: Bo Jiao <bo.jiao@...iatek.com>
> Signed-off-by: Sujuan Chen <sujuan.chen@...iatek.com>
> Signed-off-by: Shengyu Qu <wiagn233@...look.com>
> ---
> drivers/net/wireless/mediatek/mt76/mt76.h | 9 ++++
> .../net/wireless/mediatek/mt76/mt7915/main.c | 51 +++++++++++++++++--
> .../net/wireless/mediatek/mt76/mt7915/mcu.c | 18 +++++--
> .../net/wireless/mediatek/mt76/mt7915/mcu.h | 1 +
> drivers/net/wireless/mediatek/mt76/util.c | 37 ++++++++++++--
> drivers/net/wireless/mediatek/mt76/util.h | 7 ++-
> 6 files changed, 112 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
> index 132148f7b1070..638ee9fae0c73 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt76.h
> @@ -28,6 +28,9 @@
>
> #define MT76_TOKEN_FREE_THR 64
>
> +#define MT76_WED_WDS_MIN 256
> +#define MT76_WED_WDS_MAX 272
> +
> #define MT_QFLAG_WED_RING GENMASK(1, 0)
> #define MT_QFLAG_WED_TYPE GENMASK(4, 2)
> #define MT_QFLAG_WED BIT(5)
> @@ -73,6 +76,12 @@ enum mt76_wed_type {
> MT76_WED_RRO_Q_IND,
> };
>
> +enum mt76_wed_state {
> + MT76_WED_DEFAULT,
> + MT76_WED_ACTIVE,
> + MT76_WED_WDS_ACTIVE,
> +};
> +
> struct mt76_bus_ops {
> u32 (*rr)(struct mt76_dev *dev, u32 offset);
> void (*wr)(struct mt76_dev *dev, u32 offset, u32 val);
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> index 3aa31c5cefa6a..c951675f907b8 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> @@ -1,6 +1,7 @@
> // SPDX-License-Identifier: ISC
> /* Copyright (C) 2020 MediaTek Inc. */
>
> +#include "linux/fortify-string.h"
> #include <linux/etherdevice.h>
> #include <linux/platform_device.h>
> #include <linux/pci.h>
> @@ -745,8 +746,15 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
> struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
> bool ext_phy = mvif->phy != &dev->phy;
> int idx;
> + u8 flags = MT76_WED_DEFAULT;
>
> - idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA);
> + if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> + !is_mt7915(&dev->mt76)) {
> + flags = test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ?
> + MT76_WED_WDS_ACTIVE : MT76_WED_ACTIVE;
> + }
> +
> + idx = __mt76_wcid_alloc(mdev->wcid_mask, MT7915_WTBL_STA, flags);
> if (idx < 0)
> return -ENOSPC;
>
> @@ -1271,6 +1279,11 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
> {
> struct mt7915_dev *dev = mt7915_hw_dev(hw);
> struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
> + int min = MT76_WED_WDS_MIN, max = MT76_WED_WDS_MAX;
> + struct ieee80211_sta *pre_sta;
> + struct mt7915_sta *pre_msta;
> + u8 flags = MT76_WED_DEFAULT;
> + int tmp_idx;
>
> if (enabled)
> set_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags);
> @@ -1280,6 +1293,34 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
> if (!msta->wcid.sta)
> return;
>
> + if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> + !is_mt7915(&dev->mt76) &&
> + (msta->wcid.idx < min || msta->wcid.idx > max - 1)) {
> + pre_sta = kmemdup(sta, sizeof(*sta) + sizeof(*msta), GFP_KERNEL | __GFP_ZERO);
> + pre_msta = (struct mt7915_sta *)pre_sta->drv_priv;
> +
> + flags = test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ?
> + MT76_WED_WDS_ACTIVE : MT76_WED_ACTIVE;
> +
> + tmp_idx = __mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA, flags);
> + if (tmp_idx == -1)
> + goto error;
> + pre_msta->wcid.idx = (u16)tmp_idx;
> + mt7915_mac_sta_add(&dev->mt76, vif, pre_sta);
> + rcu_assign_pointer(dev->mt76.wcid[tmp_idx], &msta->wcid);
> +
> + tmp_idx = msta->wcid.idx;
> + msta->wcid.idx = pre_msta->wcid.idx;
> + pre_msta->wcid.idx = (u16)tmp_idx;
> + rcu_assign_pointer(dev->mt76.wcid[tmp_idx], NULL);
> +
> + synchronize_rcu();
> + mt7915_mac_sta_remove(&dev->mt76, vif, pre_sta);
> +
> +error:
> + kfree(pre_sta);
> + }
> +
> mt76_connac_mcu_wtbl_update_hdr_trans(&dev->mt76, vif, sta);
> }
>
> @@ -1726,15 +1767,19 @@ mt7915_net_fill_forward_path(struct ieee80211_hw *hw,
> if (!mtk_wed_device_active(wed))
> return -ENODEV;
>
> - if (msta->wcid.idx > 0xff)
> + if (msta->wcid.idx > MT7915_WTBL_STA)
> return -EIO;
>
> path->type = DEV_PATH_MTK_WDMA;
> path->dev = ctx->dev;
> path->mtk_wdma.wdma_idx = wed->wdma_idx;
> path->mtk_wdma.bss = mvif->mt76.idx;
> - path->mtk_wdma.wcid = is_mt7915(&dev->mt76) ? msta->wcid.idx : 0x3ff;
> path->mtk_wdma.queue = phy != &dev->phy;
> + if (test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ||
> + is_mt7915(&dev->mt76))
> + path->mtk_wdma.wcid = msta->wcid.idx;
> + else
> + path->mtk_wdma.wcid = 0x3ff;
>
> ctx->dev = NULL;
>
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> index 9d790f234e82c..32c5aa1a361e8 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> @@ -2385,10 +2385,20 @@ int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
>
> mt76_connac_mcu_del_wtbl_all(&dev->mt76);
>
> - if ((mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> - is_mt7915(&dev->mt76)) ||
> - !mtk_wed_get_rx_capa(&dev->mt76.mmio.wed))
> - mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(CAPABILITY), 0, 0, 0);
> +#ifdef CONFIG_NET_MEDIATEK_SOC_WED
> + if (mtk_wed_device_active(&dev->mt76.mmio.wed)) {
> + if (is_mt7915(&dev->mt76) ||
> + !mtk_wed_get_rx_capa(&dev->mt76.mmio.wed))
> + ret = mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(CAPABILITY),
> + 0, 0, 0);
> + else
> + ret = mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
> + MCU_WA_PARAM_WED_VERSION,
> + dev->mt76.mmio.wed.rev_id, 0);
> + if (ret)
> + return ret;
> + }
> +#endif
>
> ret = mt7915_mcu_set_mwds(dev, 1);
> if (ret)
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> index 49476a4182fd1..c3dd0cb4a5d38 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> @@ -278,6 +278,7 @@ enum {
> MCU_WA_PARAM_PDMA_RX = 0x04,
> MCU_WA_PARAM_CPU_UTIL = 0x0b,
> MCU_WA_PARAM_RED = 0x0e,
> + MCU_WA_PARAM_WED_VERSION = 0x32,
> MCU_WA_PARAM_RED_SETTING = 0x40,
> };
>
> diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c
> index 95b3dc96e4c45..7fac9c79ebdf3 100644
> --- a/drivers/net/wireless/mediatek/mt76/util.c
> +++ b/drivers/net/wireless/mediatek/mt76/util.c
> @@ -42,9 +42,11 @@ bool ____mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
> }
> EXPORT_SYMBOL_GPL(____mt76_poll_msec);
>
> -int mt76_wcid_alloc(u32 *mask, int size)
> +int __mt76_wcid_alloc(u32 *mask, int size, u8 flag)
> {
> int i, idx = 0, cur;
> + int min = MT76_WED_WDS_MIN;
> + int max = MT76_WED_WDS_MAX;
>
> for (i = 0; i < DIV_ROUND_UP(size, 32); i++) {
> idx = ffs(~mask[i]);
> @@ -53,16 +55,45 @@ int mt76_wcid_alloc(u32 *mask, int size)
>
> idx--;
> cur = i * 32 + idx;
> - if (cur >= size)
> +
> + switch (flag) {
> + case MT76_WED_ACTIVE:
> + if (cur >= min && cur < max)
> + continue;
> +
> + if (cur >= size) {
> + u32 end = max - min - 1;
> +
> + i = min / 32;
> + idx = ffs(~mask[i] & GENMASK(end, 0));
> + if (!idx)
> + goto error;
> + idx--;
> + cur = min + idx;
> + }
> +
> break;
> + case MT76_WED_WDS_ACTIVE:
> + if (cur < min)
> + continue;
> + if (cur >= max)
> + goto error;
> +
> + break;
> + default:
> + if (cur >= size)
> + goto error;
> + break;
> + }
>
> mask[i] |= BIT(idx);
> return cur;
> }
>
> +error:
> return -1;
> }
> -EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
> +EXPORT_SYMBOL_GPL(__mt76_wcid_alloc);
>
> int mt76_get_min_avg_rssi(struct mt76_dev *dev, u8 phy_idx)
> {
> diff --git a/drivers/net/wireless/mediatek/mt76/util.h b/drivers/net/wireless/mediatek/mt76/util.h
> index 260965dde94cf..99b7263c0a205 100644
> --- a/drivers/net/wireless/mediatek/mt76/util.h
> +++ b/drivers/net/wireless/mediatek/mt76/util.h
> @@ -27,7 +27,12 @@ enum {
> #define MT76_INCR(_var, _size) \
> (_var = (((_var) + 1) % (_size)))
>
> -int mt76_wcid_alloc(u32 *mask, int size);
> +int __mt76_wcid_alloc(u32 *mask, int size, u8 flags);
> +
> +static inline int mt76_wcid_alloc(u32 *mask, int size)
> +{
> + return __mt76_wcid_alloc(mask, size, 0);
> +}
>
> static inline void
> mt76_wcid_mask_set(u32 *mask, int idx)
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