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Testing reveals that as many as 13 frames get aggregated. This is more than what any of the chips would like to receive. RTL8822CU, RTL8822BU, and RTL8821CU want at most 3 frames, and RTL8723DU wants only 1 frame per URB. RTL8723DU in particular reliably malfunctions during a speed test if it receives more than 1 frame per URB. All traffic seems to stop. Pinging the AP no longer works. Fix this problem by limiting the number of frames sent to the chip in a single URB according to what each chip likes. Also configure RTL8822CU, RTL8822BU, and RTL8821CU to expect 3 frames per URB. RTL8703B may or may not be found in USB devices. Declare that it wants only 1 frame per URB, just in case. Tested with RTL8723DU and RTL8811CU. Cc: stable@vger.kernel.org Signed-off-by: Bitterblue Smith Acked-by: Ping-Ke Shih --- v3: - Don't sort the members of rtw{8703b,8723d,8821c,8822b,8822c}_hw_spec. - Put usb_tx_agg_desc_num in rtw{8723d,8821c,8822b,8822c}_hw_spec in a better position. - Explicitly say that RTL8723DU malfunctions if it receives more than 1 frame per URB. v2: - Use rtw_write8_mask and GENMASK. - Initialise the members of rtw{8703b,8723d,8821c,8822b,8822c}_hw_spec in the same order they are declared. --- drivers/net/wireless/realtek/rtw88/mac.c | 9 +++++++++ drivers/net/wireless/realtek/rtw88/main.h | 2 ++ drivers/net/wireless/realtek/rtw88/reg.h | 1 + drivers/net/wireless/realtek/rtw88/rtw8703b.c | 1 + drivers/net/wireless/realtek/rtw88/rtw8723d.c | 1 + drivers/net/wireless/realtek/rtw88/rtw8821c.c | 1 + drivers/net/wireless/realtek/rtw88/rtw8822b.c | 1 + drivers/net/wireless/realtek/rtw88/rtw8822c.c | 1 + drivers/net/wireless/realtek/rtw88/usb.c | 4 +++- 9 files changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c index 0dba8aae7716..564f5988ee82 100644 --- a/drivers/net/wireless/realtek/rtw88/mac.c +++ b/drivers/net/wireless/realtek/rtw88/mac.c @@ -1201,6 +1201,15 @@ static int __priority_queue_cfg(struct rtw_dev *rtwdev, rtw_write16(rtwdev, REG_FIFOPAGE_CTRL_2 + 2, fifo->rsvd_boundary); rtw_write16(rtwdev, REG_BCNQ1_BDNY_V1, fifo->rsvd_boundary); rtw_write32(rtwdev, REG_RXFF_BNDY, chip->rxff_size - C2H_PKT_BUF - 1); + + if (rtwdev->hci.type == RTW_HCI_TYPE_USB) { + rtw_write8_mask(rtwdev, REG_AUTO_LLT_V1, BIT_MASK_BLK_DESC_NUM, + chip->usb_tx_agg_desc_num); + + rtw_write8(rtwdev, REG_AUTO_LLT_V1 + 3, chip->usb_tx_agg_desc_num); + rtw_write8_set(rtwdev, REG_TXDMA_OFFSET_CHK + 1, BIT(1)); + } + rtw_write8_set(rtwdev, REG_AUTO_LLT_V1, BIT_AUTO_INIT_LLT_V1); if (!check_hw_ready(rtwdev, REG_AUTO_LLT_V1, BIT_AUTO_INIT_LLT_V1, 0)) diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index 49894331f7b4..49a3fd4fb7dc 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -1197,6 +1197,8 @@ struct rtw_chip_info { u16 fw_fifo_addr[RTW_FW_FIFO_MAX]; const struct rtw_fwcd_segs *fwcd_segs; + u8 usb_tx_agg_desc_num; + u8 default_1ss_tx_path; bool path_div_supported; diff --git a/drivers/net/wireless/realtek/rtw88/reg.h b/drivers/net/wireless/realtek/rtw88/reg.h index b122f226924b..02ef9a77316b 100644 --- a/drivers/net/wireless/realtek/rtw88/reg.h +++ b/drivers/net/wireless/realtek/rtw88/reg.h @@ -270,6 +270,7 @@ #define BIT_MASK_BCN_HEAD_1_V1 0xfff #define REG_AUTO_LLT_V1 0x0208 #define BIT_AUTO_INIT_LLT_V1 BIT(0) +#define BIT_MASK_BLK_DESC_NUM GENMASK(7, 4) #define REG_DWBCN0_CTRL 0x0208 #define BIT_BCN_VALID BIT(16) #define REG_TXDMA_OFFSET_CHK 0x020C diff --git a/drivers/net/wireless/realtek/rtw88/rtw8703b.c b/drivers/net/wireless/realtek/rtw88/rtw8703b.c index 8919f9e11f03..222608de33cd 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8703b.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8703b.c @@ -2013,6 +2013,7 @@ const struct rtw_chip_info rtw8703b_hw_spec = { .tx_stbc = false, .max_power_index = 0x3f, .ampdu_density = IEEE80211_HT_MPDU_DENSITY_16, + .usb_tx_agg_desc_num = 1, /* Not sure if this chip has USB interface */ .path_div_supported = false, .ht_supported = true, diff --git a/drivers/net/wireless/realtek/rtw88/rtw8723d.c b/drivers/net/wireless/realtek/rtw88/rtw8723d.c index f8df4c84d39f..3fba4054d45f 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8723d.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8723d.c @@ -2171,6 +2171,7 @@ const struct rtw_chip_info rtw8723d_hw_spec = { .band = RTW_BAND_2G, .page_size = TX_PAGE_SIZE, .dig_min = 0x20, + .usb_tx_agg_desc_num = 1, .ht_supported = true, .vht_supported = false, .lps_deep_mode_supported = 0, diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c index fe5d8e188350..526e8de77b3e 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c @@ -2008,6 +2008,7 @@ const struct rtw_chip_info rtw8821c_hw_spec = { .band = RTW_BAND_2G | RTW_BAND_5G, .page_size = TX_PAGE_SIZE, .dig_min = 0x1c, + .usb_tx_agg_desc_num = 3, .ht_supported = true, .vht_supported = true, .lps_deep_mode_supported = BIT(LPS_DEEP_MODE_LCLK), diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822b.c b/drivers/net/wireless/realtek/rtw88/rtw8822b.c index 3017a9760da8..2456ff242818 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8822b.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8822b.c @@ -2548,6 +2548,7 @@ const struct rtw_chip_info rtw8822b_hw_spec = { .band = RTW_BAND_2G | RTW_BAND_5G, .page_size = TX_PAGE_SIZE, .dig_min = 0x1c, + .usb_tx_agg_desc_num = 3, .ht_supported = true, .vht_supported = true, .lps_deep_mode_supported = BIT(LPS_DEEP_MODE_LCLK), diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c index cd965edc29ce..62376d1cca22 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c @@ -5366,6 +5366,7 @@ const struct rtw_chip_info rtw8822c_hw_spec = { .band = RTW_BAND_2G | RTW_BAND_5G, .page_size = TX_PAGE_SIZE, .dig_min = 0x20, + .usb_tx_agg_desc_num = 3, .default_1ss_tx_path = BB_PATH_A, .path_div_supported = true, .ht_supported = true, diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c index d204d138afe2..057c0ffbe944 100644 --- a/drivers/net/wireless/realtek/rtw88/usb.c +++ b/drivers/net/wireless/realtek/rtw88/usb.c @@ -379,7 +379,9 @@ static bool rtw_usb_tx_agg_skb(struct rtw_usb *rtwusb, struct sk_buff_head *list skb_iter = skb_peek(list); - if (skb_iter && skb_iter->len + skb_head->len <= RTW_USB_MAX_XMITBUF_SZ) + if (skb_iter && + skb_iter->len + skb_head->len <= RTW_USB_MAX_XMITBUF_SZ && + agg_num < rtwdev->chip->usb_tx_agg_desc_num) __skb_unlink(skb_iter, list); else skb_iter = NULL;