From: Bitterblue Smith Date: Sun, 16 Jun 2024 19:27:34 +0000 (+0300) Subject: wifi: rtw88: usb: Further limit the TX aggregation X-Git-Tag: v6.11-rc1~163^2~49^2~3^2~26 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d7dd13ea54af8496aca2762a758d817d6813e81c;p=thirdparty%2Flinux.git wifi: rtw88: usb: Further limit the TX aggregation Currently the number of frames sent to the chip in a single USB Request Block is limited only by the size of the TX buffer, which is 20 KiB. 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 Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/cb46ea35-7e59-4742-9c1f-01ceeaad36fb@gmail.com --- diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c index 0dba8aae77160..564f5988ee82a 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 49894331f7b49..49a3fd4fb7dcd 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 b122f226924be..02ef9a77316b4 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 8919f9e11f037..222608de33cde 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 f8df4c84d39f7..3fba4054d45f4 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 fe5d8e1883509..526e8de77b3e8 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 3017a9760da8d..2456ff2428180 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 cd965edc29cea..62376d1cca22f 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 d204d138afe29..057c0ffbe9447 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;