From patchwork Wed Jan 10 13:46:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bitterblue Smith X-Patchwork-Id: 762182 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30012495C5 for ; Wed, 10 Jan 2024 13:46:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EEyNnEQ+" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-40e4d64a431so20277165e9.0 for ; Wed, 10 Jan 2024 05:46:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704894398; x=1705499198; darn=vger.kernel.org; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=1vJ3uVgacrcDR1lT55/ZpNp2hlDHlF2p+h6Jub1OjAA=; b=EEyNnEQ+O6aMO5Q2s8p945EDIAUDMN+Ys5ijkiCq+9U+hI8c6zkc+AeVZpyVZ+R2MC wWz0EHJne8CdNxINMceOxILXkr9xwKnAiYbmBb56Qp94hHjaLid2Xs+3iLfTyS3VMY4u 2OgVCaFnJLtrYiOZ0bT1n9xef8DVtV+IZzwhv5cx3udS84skYSnvn3NWQlA/O05UQISt sJDFh3MPV/PmUZ/nswdP3LKVrocM6H61QMMTTyUJtwOFc3Y4HqOJEOtbsB0E/Hn8w0mr ig7OVUp0pn2VMg5+9BNwJs0QHQwqTWikENWGP4kpRVpeN4lXZaHJOD8QvjPfXHwyoIly FA8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704894398; x=1705499198; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=1vJ3uVgacrcDR1lT55/ZpNp2hlDHlF2p+h6Jub1OjAA=; b=M8rKELGJ+tiQWh2ed9i5LBxmMwboaidxodpJom7TRRSq3VO34imW8NFfZltSCfGz2s poCJ9CXV6+Xuv5uwyCsPeSCVwwz+VS2Z5tG5+E8SQCPZins5buE1yzmZ8X/0dVTWvN34 fPcH9CK3WB0Sjrnq/U2Vz0qPEXXo3ujMJPnDCjgX7W/RR71menyFCk7xzgO73sge8A+0 sbNP812TFEyv7DEzmSj7YxdeeTj5aw6z/qSI4ofuXimMuVz2Nv3Mb6e2wm/PR+Wlf72D 28YiBP4TivwrIajR/XJEfY3SuDTVwzgwsMBvAVEbjbJXbPZZYilt59bCueUQQYkvBzwO BJ6w== X-Gm-Message-State: AOJu0Yy1rrtAlr5ItJrMLzlYPKHrLINhUnpVovrQN6bctO8OihI3qnt+ fSAVaqRf8ISfWX8zc14Rv+8Y9Tt7Ds0= X-Google-Smtp-Source: AGHT+IE8ilBR3Vy/0FbBILbH/K3QY9Ru6WbjAA3X74c5m2mOpkCFl6ZvnPU7ww5ZD6F4U5y7ZTvvBw== X-Received: by 2002:a05:600c:468a:b0:40e:3d8d:4cc1 with SMTP id p10-20020a05600c468a00b0040e3d8d4cc1mr622382wmo.71.1704894398080; Wed, 10 Jan 2024 05:46:38 -0800 (PST) Received: from [192.168.1.50] ([81.196.40.51]) by smtp.gmail.com with ESMTPSA id k38-20020a05600c1ca600b0040e5945307esm1128716wms.40.2024.01.10.05.46.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Jan 2024 05:46:37 -0800 (PST) Message-ID: <400ec3ff-2ab7-469f-b32f-43dfd62621f9@gmail.com> Date: Wed, 10 Jan 2024 15:46:35 +0200 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: "linux-wireless@vger.kernel.org" Cc: Ping-Ke Shih , Larry Finger From: Bitterblue Smith Subject: [PATCH v2] wifi: rtlwifi: rtl_usb: Use sync register writes Currently rtl_usb performs register writes using the async usb_submit_urb() function. This appears to work fine for the RTL8192CU, but the RTL8192DU (soon to be supported by rtlwifi) has a problem: it transmits everything at the 1M rate in the 2.4 GHz band. (The 5 GHz band is still untested.) With this patch, rtl_usb performs the register writes using the synchronous usb_control_msg() function, and the RTL8192DU works normally. The RTL8192CU still works. The vendor drivers use the async writes in only one function, rtl8192du_trigger_gpio_0 / rtl8192cu_trigger_gpio_0, which probably doesn't even run in real life. They use sync writes everywhere else. Also, remove "sync" and "async" from the names of the members of struct rtl_io to avoid confusion: write{8,16,32}_async -> write{8,16,32} read{8,16,32}_sync -> read{8,16,32} Signed-off-by: Bitterblue Smith --- v2: - Rename the members of struct rtl_io. --- drivers/net/wireless/realtek/rtlwifi/pci.c | 12 +- drivers/net/wireless/realtek/rtlwifi/usb.c | 163 ++++++-------------- drivers/net/wireless/realtek/rtlwifi/wifi.h | 30 ++-- 3 files changed, 66 insertions(+), 139 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c b/drivers/net/wireless/realtek/rtlwifi/pci.c index 96ce05bcf0b3..d059cfe5a2a9 100644 --- a/drivers/net/wireless/realtek/rtlwifi/pci.c +++ b/drivers/net/wireless/realtek/rtlwifi/pci.c @@ -378,13 +378,13 @@ static void _rtl_pci_io_handler_init(struct device *dev, rtlpriv->io.dev = dev; - rtlpriv->io.write8_async = pci_write8_async; - rtlpriv->io.write16_async = pci_write16_async; - rtlpriv->io.write32_async = pci_write32_async; + rtlpriv->io.write8 = pci_write8_async; + rtlpriv->io.write16 = pci_write16_async; + rtlpriv->io.write32 = pci_write32_async; - rtlpriv->io.read8_sync = pci_read8_sync; - rtlpriv->io.read16_sync = pci_read16_sync; - rtlpriv->io.read32_sync = pci_read32_sync; + rtlpriv->io.read8 = pci_read8_sync; + rtlpriv->io.read16 = pci_read16_sync; + rtlpriv->io.read32 = pci_read32_sync; } static bool _rtl_update_earlymode_info(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/realtek/rtlwifi/usb.c b/drivers/net/wireless/realtek/rtlwifi/usb.c index 30bf2775a335..7b91d882f969 100644 --- a/drivers/net/wireless/realtek/rtlwifi/usb.c +++ b/drivers/net/wireless/realtek/rtlwifi/usb.c @@ -23,86 +23,23 @@ MODULE_DESCRIPTION("USB basic driver for rtlwifi"); #define MAX_USBCTRL_VENDORREQ_TIMES 10 -static void usbctrl_async_callback(struct urb *urb) -{ - if (urb) { - /* free dr */ - kfree(urb->setup_packet); - /* free databuf */ - kfree(urb->transfer_buffer); - } -} - -static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request, - u16 value, u16 index, void *pdata, - u16 len) -{ - int rc; - unsigned int pipe; - u8 reqtype; - struct usb_ctrlrequest *dr; - struct urb *urb; - const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE; - u8 *databuf; - - if (WARN_ON_ONCE(len > databuf_maxlen)) - len = databuf_maxlen; - - pipe = usb_sndctrlpipe(udev, 0); /* write_out */ - reqtype = REALTEK_USB_VENQT_WRITE; - - dr = kzalloc(sizeof(*dr), GFP_ATOMIC); - if (!dr) - return -ENOMEM; - - databuf = kzalloc(databuf_maxlen, GFP_ATOMIC); - if (!databuf) { - kfree(dr); - return -ENOMEM; - } - - urb = usb_alloc_urb(0, GFP_ATOMIC); - if (!urb) { - kfree(databuf); - kfree(dr); - return -ENOMEM; - } - - dr->bRequestType = reqtype; - dr->bRequest = request; - dr->wValue = cpu_to_le16(value); - dr->wIndex = cpu_to_le16(index); - dr->wLength = cpu_to_le16(len); - /* data are already in little-endian order */ - memcpy(databuf, pdata, len); - usb_fill_control_urb(urb, udev, pipe, - (unsigned char *)dr, databuf, len, - usbctrl_async_callback, NULL); - rc = usb_submit_urb(urb, GFP_ATOMIC); - if (rc < 0) { - kfree(databuf); - kfree(dr); - } - usb_free_urb(urb); - return rc; -} - -static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, - u16 value, u16 index, void *pdata, - u16 len) +static void _usbctrl_vendorreq_sync(struct usb_device *udev, u8 reqtype, + u16 value, void *pdata, u16 len) { unsigned int pipe; int status; - u8 reqtype; int vendorreq_times = 0; static int count; - pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ - reqtype = REALTEK_USB_VENQT_READ; + if (reqtype == REALTEK_USB_VENQT_READ) + pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ + else + pipe = usb_sndctrlpipe(udev, 0); /* write_out */ do { - status = usb_control_msg(udev, pipe, request, reqtype, value, - index, pdata, len, 1000); + status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ, + reqtype, value, REALTEK_USB_VENQT_CMD_IDX, + pdata, len, 1000); if (status < 0) { /* firmware download is checksumed, don't retry */ if ((value >= FW_8192C_START_ADDRESS && @@ -114,18 +51,15 @@ static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); if (status < 0 && count++ < 4) - pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n", - value, status, *(u32 *)pdata); - return status; + pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n", + value, status, *(u32 *)pdata, reqtype); } static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) { struct device *dev = rtlpriv->io.dev; struct usb_device *udev = to_usb_device(dev); - u8 request; u16 wvalue; - u16 index; __le32 *data; unsigned long flags; @@ -134,14 +68,33 @@ static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) rtlpriv->usb_data_index = 0; data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); - request = REALTEK_USB_VENQT_CMD_REQ; - index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ wvalue = (u16)addr; - _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len); + _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len); return le32_to_cpu(*data); } + +static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len) +{ + struct device *dev = rtlpriv->io.dev; + struct usb_device *udev = to_usb_device(dev); + unsigned long flags; + __le32 *data; + u16 wvalue; + + spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); + if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) + rtlpriv->usb_data_index = 0; + data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; + spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); + + wvalue = (u16)(addr & 0x0000ffff); + *data = cpu_to_le32(val); + + _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len); +} + static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) { return (u8)_usb_read_sync(rtlpriv, addr, 1); @@ -157,45 +110,19 @@ static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) return _usb_read_sync(rtlpriv, addr, 4); } -static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val, - u16 len) -{ - u8 request; - u16 wvalue; - u16 index; - __le32 data; - int ret; - - request = REALTEK_USB_VENQT_CMD_REQ; - index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ - wvalue = (u16)(addr&0x0000ffff); - data = cpu_to_le32(val); - - ret = _usbctrl_vendorreq_async_write(udev, request, wvalue, - index, &data, len); - if (ret < 0) - dev_err(&udev->dev, "error %d writing at 0x%x\n", ret, addr); -} - -static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val) +static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val) { - struct device *dev = rtlpriv->io.dev; - - _usb_write_async(to_usb_device(dev), addr, val, 1); + _usb_write_sync(rtlpriv, addr, val, 1); } -static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val) +static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val) { - struct device *dev = rtlpriv->io.dev; - - _usb_write_async(to_usb_device(dev), addr, val, 2); + _usb_write_sync(rtlpriv, addr, val, 2); } -static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) +static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val) { - struct device *dev = rtlpriv->io.dev; - - _usb_write_async(to_usb_device(dev), addr, val, 4); + _usb_write_sync(rtlpriv, addr, val, 4); } static void _rtl_usb_io_handler_init(struct device *dev, @@ -205,12 +132,12 @@ static void _rtl_usb_io_handler_init(struct device *dev, rtlpriv->io.dev = dev; mutex_init(&rtlpriv->io.bb_mutex); - rtlpriv->io.write8_async = _usb_write8_async; - rtlpriv->io.write16_async = _usb_write16_async; - rtlpriv->io.write32_async = _usb_write32_async; - rtlpriv->io.read8_sync = _usb_read8_sync; - rtlpriv->io.read16_sync = _usb_read16_sync; - rtlpriv->io.read32_sync = _usb_read32_sync; + rtlpriv->io.write8 = _usb_write8_sync; + rtlpriv->io.write16 = _usb_write16_sync; + rtlpriv->io.write32 = _usb_write32_sync; + rtlpriv->io.read8 = _usb_read8_sync; + rtlpriv->io.read16 = _usb_read16_sync; + rtlpriv->io.read32 = _usb_read32_sync; } static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h index d87cd2252eac..53af324f3807 100644 --- a/drivers/net/wireless/realtek/rtlwifi/wifi.h +++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h @@ -1447,13 +1447,13 @@ struct rtl_io { /*PCI IO map */ unsigned long pci_base_addr; /*device I/O address */ - void (*write8_async)(struct rtl_priv *rtlpriv, u32 addr, u8 val); - void (*write16_async)(struct rtl_priv *rtlpriv, u32 addr, u16 val); - void (*write32_async)(struct rtl_priv *rtlpriv, u32 addr, u32 val); + void (*write8)(struct rtl_priv *rtlpriv, u32 addr, u8 val); + void (*write16)(struct rtl_priv *rtlpriv, u32 addr, u16 val); + void (*write32)(struct rtl_priv *rtlpriv, u32 addr, u32 val); - u8 (*read8_sync)(struct rtl_priv *rtlpriv, u32 addr); - u16 (*read16_sync)(struct rtl_priv *rtlpriv, u32 addr); - u32 (*read32_sync)(struct rtl_priv *rtlpriv, u32 addr); + u8 (*read8)(struct rtl_priv *rtlpriv, u32 addr); + u16 (*read16)(struct rtl_priv *rtlpriv, u32 addr); + u32 (*read32)(struct rtl_priv *rtlpriv, u32 addr); }; @@ -2916,25 +2916,25 @@ extern u8 channel5g_80m[CHANNEL_MAX_NUMBER_5G_80M]; static inline u8 rtl_read_byte(struct rtl_priv *rtlpriv, u32 addr) { - return rtlpriv->io.read8_sync(rtlpriv, addr); + return rtlpriv->io.read8(rtlpriv, addr); } static inline u16 rtl_read_word(struct rtl_priv *rtlpriv, u32 addr) { - return rtlpriv->io.read16_sync(rtlpriv, addr); + return rtlpriv->io.read16(rtlpriv, addr); } static inline u32 rtl_read_dword(struct rtl_priv *rtlpriv, u32 addr) { - return rtlpriv->io.read32_sync(rtlpriv, addr); + return rtlpriv->io.read32(rtlpriv, addr); } static inline void rtl_write_byte(struct rtl_priv *rtlpriv, u32 addr, u8 val8) { - rtlpriv->io.write8_async(rtlpriv, addr, val8); + rtlpriv->io.write8(rtlpriv, addr, val8); if (rtlpriv->cfg->write_readback) - rtlpriv->io.read8_sync(rtlpriv, addr); + rtlpriv->io.read8(rtlpriv, addr); } static inline void rtl_write_byte_with_val32(struct ieee80211_hw *hw, @@ -2947,19 +2947,19 @@ static inline void rtl_write_byte_with_val32(struct ieee80211_hw *hw, static inline void rtl_write_word(struct rtl_priv *rtlpriv, u32 addr, u16 val16) { - rtlpriv->io.write16_async(rtlpriv, addr, val16); + rtlpriv->io.write16(rtlpriv, addr, val16); if (rtlpriv->cfg->write_readback) - rtlpriv->io.read16_sync(rtlpriv, addr); + rtlpriv->io.read16(rtlpriv, addr); } static inline void rtl_write_dword(struct rtl_priv *rtlpriv, u32 addr, u32 val32) { - rtlpriv->io.write32_async(rtlpriv, addr, val32); + rtlpriv->io.write32(rtlpriv, addr, val32); if (rtlpriv->cfg->write_readback) - rtlpriv->io.read32_sync(rtlpriv, addr); + rtlpriv->io.read32(rtlpriv, addr); } static inline u32 rtl_get_bbreg(struct ieee80211_hw *hw,