1900d495aSAlexey Orishko /* 2900d495aSAlexey Orishko * cdc_ncm.c 3900d495aSAlexey Orishko * 4c84ff1d6SAlexey Orishko * Copyright (C) ST-Ericsson 2010-2012 5900d495aSAlexey Orishko * Contact: Alexey Orishko <alexey.orishko@stericsson.com> 6900d495aSAlexey Orishko * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> 7900d495aSAlexey Orishko * 8900d495aSAlexey Orishko * USB Host Driver for Network Control Model (NCM) 9900d495aSAlexey Orishko * http://www.usb.org/developers/devclass_docs/NCM10.zip 10900d495aSAlexey Orishko * 11900d495aSAlexey Orishko * The NCM encoding, decoding and initialization logic 12900d495aSAlexey Orishko * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h 13900d495aSAlexey Orishko * 14900d495aSAlexey Orishko * This software is available to you under a choice of one of two 15900d495aSAlexey Orishko * licenses. You may choose this file to be licensed under the terms 16900d495aSAlexey Orishko * of the GNU General Public License (GPL) Version 2 or the 2-clause 17900d495aSAlexey Orishko * BSD license listed below: 18900d495aSAlexey Orishko * 19900d495aSAlexey Orishko * Redistribution and use in source and binary forms, with or without 20900d495aSAlexey Orishko * modification, are permitted provided that the following conditions 21900d495aSAlexey Orishko * are met: 22900d495aSAlexey Orishko * 1. Redistributions of source code must retain the above copyright 23900d495aSAlexey Orishko * notice, this list of conditions and the following disclaimer. 24900d495aSAlexey Orishko * 2. Redistributions in binary form must reproduce the above copyright 25900d495aSAlexey Orishko * notice, this list of conditions and the following disclaimer in the 26900d495aSAlexey Orishko * documentation and/or other materials provided with the distribution. 27900d495aSAlexey Orishko * 28900d495aSAlexey Orishko * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 29900d495aSAlexey Orishko * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30900d495aSAlexey Orishko * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31900d495aSAlexey Orishko * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 32900d495aSAlexey Orishko * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33900d495aSAlexey Orishko * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34900d495aSAlexey Orishko * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35900d495aSAlexey Orishko * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36900d495aSAlexey Orishko * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37900d495aSAlexey Orishko * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38900d495aSAlexey Orishko * SUCH DAMAGE. 39900d495aSAlexey Orishko */ 40900d495aSAlexey Orishko 41900d495aSAlexey Orishko #include <linux/module.h> 42900d495aSAlexey Orishko #include <linux/init.h> 43900d495aSAlexey Orishko #include <linux/netdevice.h> 44900d495aSAlexey Orishko #include <linux/ctype.h> 45900d495aSAlexey Orishko #include <linux/ethtool.h> 46900d495aSAlexey Orishko #include <linux/workqueue.h> 47900d495aSAlexey Orishko #include <linux/mii.h> 48900d495aSAlexey Orishko #include <linux/crc32.h> 49900d495aSAlexey Orishko #include <linux/usb.h> 50c84ff1d6SAlexey Orishko #include <linux/hrtimer.h> 51900d495aSAlexey Orishko #include <linux/atomic.h> 52900d495aSAlexey Orishko #include <linux/usb/usbnet.h> 53900d495aSAlexey Orishko #include <linux/usb/cdc.h> 54c91ce3b6SBjørn Mork #include <linux/usb/cdc_ncm.h> 55900d495aSAlexey Orishko 56c84ff1d6SAlexey Orishko #define DRIVER_VERSION "14-Mar-2012" 57900d495aSAlexey Orishko 581e8bbe6cSBjørn Mork #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 591e8bbe6cSBjørn Mork static bool prefer_mbim = true; 601e8bbe6cSBjørn Mork #else 611e8bbe6cSBjørn Mork static bool prefer_mbim; 621e8bbe6cSBjørn Mork #endif 631e8bbe6cSBjørn Mork module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 641e8bbe6cSBjørn Mork MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 651e8bbe6cSBjørn Mork 66c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param); 67c84ff1d6SAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 68c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 69900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver; 70900d495aSAlexey Orishko 71900d495aSAlexey Orishko static void 72900d495aSAlexey Orishko cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 73900d495aSAlexey Orishko { 74900d495aSAlexey Orishko struct usbnet *dev = netdev_priv(net); 75900d495aSAlexey Orishko 767826d43fSJiri Pirko strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); 777826d43fSJiri Pirko strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 787826d43fSJiri Pirko strlcpy(info->fw_version, dev->driver_info->description, 79900d495aSAlexey Orishko sizeof(info->fw_version)); 80900d495aSAlexey Orishko usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 81900d495aSAlexey Orishko } 82900d495aSAlexey Orishko 83bed6f762SBjørn Mork static u8 cdc_ncm_setup(struct usbnet *dev) 84900d495aSAlexey Orishko { 85bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 866a9612e2SBjørn Mork struct usb_cdc_ncm_ntb_parameters ncm_parm; 87900d495aSAlexey Orishko u32 val; 88900d495aSAlexey Orishko u8 flags; 89900d495aSAlexey Orishko u8 iface_no; 90900d495aSAlexey Orishko int err; 912d1c4310SGreg Suarez int eth_hlen; 9284e77a8bSAlexey Orishko u16 ntb_fmt_supported; 932d1c4310SGreg Suarez u32 min_dgram_size; 942d1c4310SGreg Suarez u32 min_hdr_size; 95900d495aSAlexey Orishko 96900d495aSAlexey Orishko iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 97900d495aSAlexey Orishko 9890b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 9936c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 10036c35416SGiuseppe Scrivano |USB_RECIP_INTERFACE, 1016a9612e2SBjørn Mork 0, iface_no, &ncm_parm, 1026a9612e2SBjørn Mork sizeof(ncm_parm)); 10336c35416SGiuseppe Scrivano if (err < 0) { 104900d495aSAlexey Orishko pr_debug("failed GET_NTB_PARAMETERS\n"); 105900d495aSAlexey Orishko return 1; 106900d495aSAlexey Orishko } 107900d495aSAlexey Orishko 108900d495aSAlexey Orishko /* read correct set of parameters according to device mode */ 1096a9612e2SBjørn Mork ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize); 1106a9612e2SBjørn Mork ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize); 1116a9612e2SBjørn Mork ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder); 1126a9612e2SBjørn Mork ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor); 1136a9612e2SBjørn Mork ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment); 11484e77a8bSAlexey Orishko /* devices prior to NCM Errata shall set this field to zero */ 1156a9612e2SBjørn Mork ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams); 1166a9612e2SBjørn Mork ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported); 117900d495aSAlexey Orishko 1182d1c4310SGreg Suarez eth_hlen = ETH_HLEN; 1192d1c4310SGreg Suarez min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 1202d1c4310SGreg Suarez min_hdr_size = CDC_NCM_MIN_HDR_SIZE; 1212d1c4310SGreg Suarez if (ctx->mbim_desc != NULL) { 1222d1c4310SGreg Suarez flags = ctx->mbim_desc->bmNetworkCapabilities; 1232d1c4310SGreg Suarez eth_hlen = 0; 1242d1c4310SGreg Suarez min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 1252d1c4310SGreg Suarez min_hdr_size = 0; 1262d1c4310SGreg Suarez } else if (ctx->func_desc != NULL) { 127900d495aSAlexey Orishko flags = ctx->func_desc->bmNetworkCapabilities; 1282d1c4310SGreg Suarez } else { 129900d495aSAlexey Orishko flags = 0; 1302d1c4310SGreg Suarez } 131900d495aSAlexey Orishko 132900d495aSAlexey Orishko pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 133900d495aSAlexey Orishko "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 13484e77a8bSAlexey Orishko "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 135900d495aSAlexey Orishko ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 13684e77a8bSAlexey Orishko ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 137900d495aSAlexey Orishko 13884e77a8bSAlexey Orishko /* max count of tx datagrams */ 13984e77a8bSAlexey Orishko if ((ctx->tx_max_datagrams == 0) || 14084e77a8bSAlexey Orishko (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 141900d495aSAlexey Orishko ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 142900d495aSAlexey Orishko 143900d495aSAlexey Orishko /* verify maximum size of received NTB in bytes */ 14484e77a8bSAlexey Orishko if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 14584e77a8bSAlexey Orishko pr_debug("Using min receive length=%d\n", 14684e77a8bSAlexey Orishko USB_CDC_NCM_NTB_MIN_IN_SIZE); 14784e77a8bSAlexey Orishko ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 14884e77a8bSAlexey Orishko } 14984e77a8bSAlexey Orishko 15084e77a8bSAlexey Orishko if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 151900d495aSAlexey Orishko pr_debug("Using default maximum receive length=%d\n", 152900d495aSAlexey Orishko CDC_NCM_NTB_MAX_SIZE_RX); 153900d495aSAlexey Orishko ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 154900d495aSAlexey Orishko } 155900d495aSAlexey Orishko 15684e77a8bSAlexey Orishko /* inform device about NTB input size changes */ 1576a9612e2SBjørn Mork if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) { 15890b8b037SMing Lei __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 159dad957d7SBjørn Mork 16090b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 16175bc8ef5SJosh Boyer USB_TYPE_CLASS | USB_DIR_OUT 16275bc8ef5SJosh Boyer | USB_RECIP_INTERFACE, 16390b8b037SMing Lei 0, iface_no, &dwNtbInMaxSize, 4); 16436c35416SGiuseppe Scrivano if (err < 0) 16584e77a8bSAlexey Orishko pr_debug("Setting NTB Input Size failed\n"); 16684e77a8bSAlexey Orishko } 16784e77a8bSAlexey Orishko 168900d495aSAlexey Orishko /* verify maximum size of transmitted NTB in bytes */ 169900d495aSAlexey Orishko if ((ctx->tx_max < 1702d1c4310SGreg Suarez (min_hdr_size + min_dgram_size)) || 171900d495aSAlexey Orishko (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 172900d495aSAlexey Orishko pr_debug("Using default maximum transmit length=%d\n", 173900d495aSAlexey Orishko CDC_NCM_NTB_MAX_SIZE_TX); 174900d495aSAlexey Orishko ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 1756a9612e2SBjørn Mork 1766a9612e2SBjørn Mork /* Adding a pad byte here simplifies the handling in 1776a9612e2SBjørn Mork * cdc_ncm_fill_tx_frame, by making tx_max always 1786a9612e2SBjørn Mork * represent the real skb max size. 1796a9612e2SBjørn Mork */ 1806a9612e2SBjørn Mork if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) 1816a9612e2SBjørn Mork ctx->tx_max++; 1826a9612e2SBjørn Mork 183900d495aSAlexey Orishko } 184900d495aSAlexey Orishko 185900d495aSAlexey Orishko /* 186900d495aSAlexey Orishko * verify that the structure alignment is: 187900d495aSAlexey Orishko * - power of two 188900d495aSAlexey Orishko * - not greater than the maximum transmit length 189900d495aSAlexey Orishko * - not less than four bytes 190900d495aSAlexey Orishko */ 191900d495aSAlexey Orishko val = ctx->tx_ndp_modulus; 192900d495aSAlexey Orishko 193900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 194900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 195900d495aSAlexey Orishko pr_debug("Using default alignment: 4 bytes\n"); 196900d495aSAlexey Orishko ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 197900d495aSAlexey Orishko } 198900d495aSAlexey Orishko 199900d495aSAlexey Orishko /* 200900d495aSAlexey Orishko * verify that the payload alignment is: 201900d495aSAlexey Orishko * - power of two 202900d495aSAlexey Orishko * - not greater than the maximum transmit length 203900d495aSAlexey Orishko * - not less than four bytes 204900d495aSAlexey Orishko */ 205900d495aSAlexey Orishko val = ctx->tx_modulus; 206900d495aSAlexey Orishko 207900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 208900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 209900d495aSAlexey Orishko pr_debug("Using default transmit modulus: 4 bytes\n"); 210900d495aSAlexey Orishko ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 211900d495aSAlexey Orishko } 212900d495aSAlexey Orishko 213900d495aSAlexey Orishko /* verify the payload remainder */ 214900d495aSAlexey Orishko if (ctx->tx_remainder >= ctx->tx_modulus) { 215900d495aSAlexey Orishko pr_debug("Using default transmit remainder: 0 bytes\n"); 216900d495aSAlexey Orishko ctx->tx_remainder = 0; 217900d495aSAlexey Orishko } 218900d495aSAlexey Orishko 219900d495aSAlexey Orishko /* adjust TX-remainder according to NCM specification. */ 2202d1c4310SGreg Suarez ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 221900d495aSAlexey Orishko (ctx->tx_modulus - 1)); 222900d495aSAlexey Orishko 223900d495aSAlexey Orishko /* additional configuration */ 224900d495aSAlexey Orishko 225900d495aSAlexey Orishko /* set CRC Mode */ 22684e77a8bSAlexey Orishko if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 22790b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 22836c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_OUT 22936c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 23036c35416SGiuseppe Scrivano USB_CDC_NCM_CRC_NOT_APPENDED, 23190b8b037SMing Lei iface_no, NULL, 0); 23236c35416SGiuseppe Scrivano if (err < 0) 233900d495aSAlexey Orishko pr_debug("Setting CRC mode off failed\n"); 23484e77a8bSAlexey Orishko } 235900d495aSAlexey Orishko 23684e77a8bSAlexey Orishko /* set NTB format, if both formats are supported */ 23784e77a8bSAlexey Orishko if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 23890b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 23990b8b037SMing Lei USB_TYPE_CLASS | USB_DIR_OUT 24090b8b037SMing Lei | USB_RECIP_INTERFACE, 24136c35416SGiuseppe Scrivano USB_CDC_NCM_NTB16_FORMAT, 24290b8b037SMing Lei iface_no, NULL, 0); 24336c35416SGiuseppe Scrivano if (err < 0) 244900d495aSAlexey Orishko pr_debug("Setting NTB format to 16-bit failed\n"); 24584e77a8bSAlexey Orishko } 24684e77a8bSAlexey Orishko 2472d1c4310SGreg Suarez ctx->max_datagram_size = min_dgram_size; 248900d495aSAlexey Orishko 249900d495aSAlexey Orishko /* set Max Datagram Size (MTU) */ 25084e77a8bSAlexey Orishko if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 25190b8b037SMing Lei __le16 max_datagram_size; 2522d1c4310SGreg Suarez u16 eth_max_sz; 2532d1c4310SGreg Suarez if (ctx->ether_desc != NULL) 2542d1c4310SGreg Suarez eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 2552d1c4310SGreg Suarez else if (ctx->mbim_desc != NULL) 2562d1c4310SGreg Suarez eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 2572d1c4310SGreg Suarez else 2582d1c4310SGreg Suarez goto max_dgram_err; 25975bc8ef5SJosh Boyer 26090b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 26136c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 26236c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 26390b8b037SMing Lei 0, iface_no, &max_datagram_size, 2); 26436c35416SGiuseppe Scrivano if (err < 0) { 26584e77a8bSAlexey Orishko pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 2662d1c4310SGreg Suarez min_dgram_size); 267900d495aSAlexey Orishko } else { 26875bc8ef5SJosh Boyer ctx->max_datagram_size = 26990b8b037SMing Lei le16_to_cpu(max_datagram_size); 27084e77a8bSAlexey Orishko /* Check Eth descriptor value */ 27184e77a8bSAlexey Orishko if (ctx->max_datagram_size > eth_max_sz) 27284e77a8bSAlexey Orishko ctx->max_datagram_size = eth_max_sz; 2733f658cdeSAlexey Orishko 2743f658cdeSAlexey Orishko if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 2752d1c4310SGreg Suarez ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 276900d495aSAlexey Orishko 2772d1c4310SGreg Suarez if (ctx->max_datagram_size < min_dgram_size) 2782d1c4310SGreg Suarez ctx->max_datagram_size = min_dgram_size; 27984e77a8bSAlexey Orishko 28084e77a8bSAlexey Orishko /* if value changed, update device */ 2813f658cdeSAlexey Orishko if (ctx->max_datagram_size != 28290b8b037SMing Lei le16_to_cpu(max_datagram_size)) { 2831b5287a7SBjørn Mork max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 28490b8b037SMing Lei err = usbnet_write_cmd(dev, 28536c35416SGiuseppe Scrivano USB_CDC_SET_MAX_DATAGRAM_SIZE, 28636c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_OUT 28736c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 28836c35416SGiuseppe Scrivano 0, 28990b8b037SMing Lei iface_no, &max_datagram_size, 29090b8b037SMing Lei 2); 29136c35416SGiuseppe Scrivano if (err < 0) 2923f658cdeSAlexey Orishko pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 2933f658cdeSAlexey Orishko } 2943f658cdeSAlexey Orishko } 29584e77a8bSAlexey Orishko } 29684e77a8bSAlexey Orishko 2973f658cdeSAlexey Orishko max_dgram_err: 298bed6f762SBjørn Mork if (dev->net->mtu != (ctx->max_datagram_size - eth_hlen)) 299bed6f762SBjørn Mork dev->net->mtu = ctx->max_datagram_size - eth_hlen; 300900d495aSAlexey Orishko 301900d495aSAlexey Orishko return 0; 302900d495aSAlexey Orishko } 303900d495aSAlexey Orishko 304900d495aSAlexey Orishko static void 305ff1632aaSBjørn Mork cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 306900d495aSAlexey Orishko { 307ff1632aaSBjørn Mork struct usb_host_endpoint *e, *in = NULL, *out = NULL; 308900d495aSAlexey Orishko u8 ep; 309900d495aSAlexey Orishko 310900d495aSAlexey Orishko for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 311900d495aSAlexey Orishko 312900d495aSAlexey Orishko e = intf->cur_altsetting->endpoint + ep; 313900d495aSAlexey Orishko switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 314900d495aSAlexey Orishko case USB_ENDPOINT_XFER_INT: 315900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 316ff1632aaSBjørn Mork if (!dev->status) 317ff1632aaSBjørn Mork dev->status = e; 318900d495aSAlexey Orishko } 319900d495aSAlexey Orishko break; 320900d495aSAlexey Orishko 321900d495aSAlexey Orishko case USB_ENDPOINT_XFER_BULK: 322900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 323ff1632aaSBjørn Mork if (!in) 324ff1632aaSBjørn Mork in = e; 325900d495aSAlexey Orishko } else { 326ff1632aaSBjørn Mork if (!out) 327ff1632aaSBjørn Mork out = e; 328900d495aSAlexey Orishko } 329900d495aSAlexey Orishko break; 330900d495aSAlexey Orishko 331900d495aSAlexey Orishko default: 332900d495aSAlexey Orishko break; 333900d495aSAlexey Orishko } 334900d495aSAlexey Orishko } 335ff1632aaSBjørn Mork if (in && !dev->in) 336ff1632aaSBjørn Mork dev->in = usb_rcvbulkpipe(dev->udev, 337ff1632aaSBjørn Mork in->desc.bEndpointAddress & 338ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 339ff1632aaSBjørn Mork if (out && !dev->out) 340ff1632aaSBjørn Mork dev->out = usb_sndbulkpipe(dev->udev, 341ff1632aaSBjørn Mork out->desc.bEndpointAddress & 342ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 343900d495aSAlexey Orishko } 344900d495aSAlexey Orishko 345900d495aSAlexey Orishko static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 346900d495aSAlexey Orishko { 347900d495aSAlexey Orishko if (ctx == NULL) 348900d495aSAlexey Orishko return; 349900d495aSAlexey Orishko 350900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 351900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 352900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 353900d495aSAlexey Orishko } 354900d495aSAlexey Orishko 355900d495aSAlexey Orishko if (ctx->tx_curr_skb != NULL) { 356900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_curr_skb); 357900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 358900d495aSAlexey Orishko } 359900d495aSAlexey Orishko 360900d495aSAlexey Orishko kfree(ctx); 361900d495aSAlexey Orishko } 362900d495aSAlexey Orishko 363f94898eaSDan Williams static const struct ethtool_ops cdc_ncm_ethtool_ops = { 364f94898eaSDan Williams .get_drvinfo = cdc_ncm_get_drvinfo, 365f94898eaSDan Williams .get_link = usbnet_get_link, 366f94898eaSDan Williams .get_msglevel = usbnet_get_msglevel, 367f94898eaSDan Williams .set_msglevel = usbnet_set_msglevel, 368f94898eaSDan Williams .get_settings = usbnet_get_settings, 369f94898eaSDan Williams .set_settings = usbnet_set_settings, 370f94898eaSDan Williams .nway_reset = usbnet_nway_reset, 371f94898eaSDan Williams }; 372f94898eaSDan Williams 373c91ce3b6SBjørn Mork int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 374900d495aSAlexey Orishko { 37583292236SBjørn Mork const struct usb_cdc_union_desc *union_desc = NULL; 376900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 377900d495aSAlexey Orishko struct usb_driver *driver; 378900d495aSAlexey Orishko u8 *buf; 379900d495aSAlexey Orishko int len; 380900d495aSAlexey Orishko int temp; 381900d495aSAlexey Orishko u8 iface_no; 382900d495aSAlexey Orishko 383c796984fSThomas Meyer ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 3848f0923c1SDevendra Naga if (!ctx) 3858f0923c1SDevendra Naga return -ENOMEM; 386900d495aSAlexey Orishko 387c84ff1d6SAlexey Orishko hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 388c84ff1d6SAlexey Orishko ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 389bed6f762SBjørn Mork ctx->bh.data = (unsigned long)dev; 390c84ff1d6SAlexey Orishko ctx->bh.func = cdc_ncm_txpath_bh; 391c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 0); 392900d495aSAlexey Orishko spin_lock_init(&ctx->mtx); 393900d495aSAlexey Orishko 394900d495aSAlexey Orishko /* store ctx pointer in device data field */ 395900d495aSAlexey Orishko dev->data[0] = (unsigned long)ctx; 396900d495aSAlexey Orishko 3979fe0234cSBjørn Mork /* only the control interface can be successfully probed */ 3989fe0234cSBjørn Mork ctx->control = intf; 3999fe0234cSBjørn Mork 400900d495aSAlexey Orishko /* get some pointers */ 401900d495aSAlexey Orishko driver = driver_of(intf); 402900d495aSAlexey Orishko buf = intf->cur_altsetting->extra; 403900d495aSAlexey Orishko len = intf->cur_altsetting->extralen; 404900d495aSAlexey Orishko 405900d495aSAlexey Orishko /* parse through descriptors associated with control interface */ 406900d495aSAlexey Orishko while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 407900d495aSAlexey Orishko 408900d495aSAlexey Orishko if (buf[1] != USB_DT_CS_INTERFACE) 409900d495aSAlexey Orishko goto advance; 410900d495aSAlexey Orishko 411900d495aSAlexey Orishko switch (buf[2]) { 412900d495aSAlexey Orishko case USB_CDC_UNION_TYPE: 41383292236SBjørn Mork if (buf[0] < sizeof(*union_desc)) 414900d495aSAlexey Orishko break; 415900d495aSAlexey Orishko 41683292236SBjørn Mork union_desc = (const struct usb_cdc_union_desc *)buf; 4179fe0234cSBjørn Mork /* the master must be the interface we are probing */ 4189fe0234cSBjørn Mork if (intf->cur_altsetting->desc.bInterfaceNumber != 4199fe0234cSBjørn Mork union_desc->bMasterInterface0) 4209fe0234cSBjørn Mork goto error; 421900d495aSAlexey Orishko ctx->data = usb_ifnum_to_if(dev->udev, 42283292236SBjørn Mork union_desc->bSlaveInterface0); 423900d495aSAlexey Orishko break; 424900d495aSAlexey Orishko 425900d495aSAlexey Orishko case USB_CDC_ETHERNET_TYPE: 426900d495aSAlexey Orishko if (buf[0] < sizeof(*(ctx->ether_desc))) 427900d495aSAlexey Orishko break; 428900d495aSAlexey Orishko 429900d495aSAlexey Orishko ctx->ether_desc = 430900d495aSAlexey Orishko (const struct usb_cdc_ether_desc *)buf; 431900d495aSAlexey Orishko dev->hard_mtu = 432900d495aSAlexey Orishko le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 433900d495aSAlexey Orishko 43484e77a8bSAlexey Orishko if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 43584e77a8bSAlexey Orishko dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 43684e77a8bSAlexey Orishko else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 43784e77a8bSAlexey Orishko dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 438900d495aSAlexey Orishko break; 439900d495aSAlexey Orishko 440900d495aSAlexey Orishko case USB_CDC_NCM_TYPE: 441900d495aSAlexey Orishko if (buf[0] < sizeof(*(ctx->func_desc))) 442900d495aSAlexey Orishko break; 443900d495aSAlexey Orishko 444900d495aSAlexey Orishko ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 445900d495aSAlexey Orishko break; 446900d495aSAlexey Orishko 44738396e4cSGreg Suarez case USB_CDC_MBIM_TYPE: 44838396e4cSGreg Suarez if (buf[0] < sizeof(*(ctx->mbim_desc))) 44938396e4cSGreg Suarez break; 45038396e4cSGreg Suarez 45138396e4cSGreg Suarez ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 45238396e4cSGreg Suarez break; 45338396e4cSGreg Suarez 454900d495aSAlexey Orishko default: 455900d495aSAlexey Orishko break; 456900d495aSAlexey Orishko } 457900d495aSAlexey Orishko advance: 458900d495aSAlexey Orishko /* advance to next descriptor */ 459900d495aSAlexey Orishko temp = buf[0]; 460900d495aSAlexey Orishko buf += temp; 461900d495aSAlexey Orishko len -= temp; 462900d495aSAlexey Orishko } 463900d495aSAlexey Orishko 4649992c2e2SBjørn Mork /* some buggy devices have an IAD but no CDC Union */ 46583292236SBjørn Mork if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 46656a666dcSBjørn Mork ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 46756a666dcSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 4689992c2e2SBjørn Mork } 4699992c2e2SBjørn Mork 470900d495aSAlexey Orishko /* check if we got everything */ 4719fe0234cSBjørn Mork if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) 472900d495aSAlexey Orishko goto error; 473900d495aSAlexey Orishko 474bbc8d922SBjørn Mork /* claim data interface, if different from control */ 475bbc8d922SBjørn Mork if (ctx->data != ctx->control) { 476900d495aSAlexey Orishko temp = usb_driver_claim_interface(driver, ctx->data, dev); 477900d495aSAlexey Orishko if (temp) 478900d495aSAlexey Orishko goto error; 479bbc8d922SBjørn Mork } 480900d495aSAlexey Orishko 481900d495aSAlexey Orishko iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 482900d495aSAlexey Orishko 483900d495aSAlexey Orishko /* reset data interface */ 484900d495aSAlexey Orishko temp = usb_set_interface(dev->udev, iface_no, 0); 485900d495aSAlexey Orishko if (temp) 48619694ac8SAlexey Orishko goto error2; 487900d495aSAlexey Orishko 488900d495aSAlexey Orishko /* configure data interface */ 48938396e4cSGreg Suarez temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 490900d495aSAlexey Orishko if (temp) 49119694ac8SAlexey Orishko goto error2; 492900d495aSAlexey Orishko 493ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->data); 494ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->control); 495ff1632aaSBjørn Mork if (!dev->in || !dev->out || !dev->status) 49619694ac8SAlexey Orishko goto error2; 497900d495aSAlexey Orishko 4986a9612e2SBjørn Mork /* initialize data interface */ 4996a9612e2SBjørn Mork if (cdc_ncm_setup(dev)) 5006a9612e2SBjørn Mork goto error2; 5016a9612e2SBjørn Mork 502900d495aSAlexey Orishko dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 503900d495aSAlexey Orishko 504900d495aSAlexey Orishko usb_set_intfdata(ctx->data, dev); 505900d495aSAlexey Orishko usb_set_intfdata(ctx->control, dev); 506900d495aSAlexey Orishko 50738396e4cSGreg Suarez if (ctx->ether_desc) { 508900d495aSAlexey Orishko temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 509900d495aSAlexey Orishko if (temp) 51019694ac8SAlexey Orishko goto error2; 511517cd81cSDanny Kukawka dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 51238396e4cSGreg Suarez } 51338396e4cSGreg Suarez 514900d495aSAlexey Orishko dev->rx_urb_size = ctx->rx_max; 515900d495aSAlexey Orishko 516900d495aSAlexey Orishko return 0; 517900d495aSAlexey Orishko 51819694ac8SAlexey Orishko error2: 51919694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 52019694ac8SAlexey Orishko usb_set_intfdata(ctx->data, NULL); 5216b4ef602SBjørn Mork if (ctx->data != ctx->control) 52219694ac8SAlexey Orishko usb_driver_release_interface(driver, ctx->data); 523900d495aSAlexey Orishko error: 524900d495aSAlexey Orishko cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 525900d495aSAlexey Orishko dev->data[0] = 0; 52619694ac8SAlexey Orishko dev_info(&dev->udev->dev, "bind() failure\n"); 527900d495aSAlexey Orishko return -ENODEV; 528900d495aSAlexey Orishko } 529c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 530900d495aSAlexey Orishko 531c91ce3b6SBjørn Mork void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 532900d495aSAlexey Orishko { 533900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 53419694ac8SAlexey Orishko struct usb_driver *driver = driver_of(intf); 535900d495aSAlexey Orishko 536900d495aSAlexey Orishko if (ctx == NULL) 537900d495aSAlexey Orishko return; /* no setup */ 538900d495aSAlexey Orishko 539c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 1); 540c84ff1d6SAlexey Orishko 541c84ff1d6SAlexey Orishko if (hrtimer_active(&ctx->tx_timer)) 542c84ff1d6SAlexey Orishko hrtimer_cancel(&ctx->tx_timer); 543c84ff1d6SAlexey Orishko 544c84ff1d6SAlexey Orishko tasklet_kill(&ctx->bh); 545c84ff1d6SAlexey Orishko 546bbc8d922SBjørn Mork /* handle devices with combined control and data interface */ 547bbc8d922SBjørn Mork if (ctx->control == ctx->data) 548bbc8d922SBjørn Mork ctx->data = NULL; 549bbc8d922SBjørn Mork 55019694ac8SAlexey Orishko /* disconnect master --> disconnect slave */ 55119694ac8SAlexey Orishko if (intf == ctx->control && ctx->data) { 552900d495aSAlexey Orishko usb_set_intfdata(ctx->data, NULL); 553900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->data); 55419694ac8SAlexey Orishko ctx->data = NULL; 555900d495aSAlexey Orishko 55619694ac8SAlexey Orishko } else if (intf == ctx->data && ctx->control) { 55719694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 558900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->control); 55919694ac8SAlexey Orishko ctx->control = NULL; 560900d495aSAlexey Orishko } 561900d495aSAlexey Orishko 5623e515665SBjørn Mork usb_set_intfdata(intf, NULL); 563900d495aSAlexey Orishko cdc_ncm_free(ctx); 564900d495aSAlexey Orishko } 565c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 566900d495aSAlexey Orishko 5671e8bbe6cSBjørn Mork /* Select the MBIM altsetting iff it is preferred and available, 5681e8bbe6cSBjørn Mork * returning the number of the corresponding data interface altsetting 5691e8bbe6cSBjørn Mork */ 5701e8bbe6cSBjørn Mork u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) 57138396e4cSGreg Suarez { 5721e8bbe6cSBjørn Mork struct usb_host_interface *alt; 57338396e4cSGreg Suarez 574bd329e12SBjørn Mork /* The MBIM spec defines a NCM compatible default altsetting, 575bd329e12SBjørn Mork * which we may have matched: 576bd329e12SBjørn Mork * 577bd329e12SBjørn Mork * "Functions that implement both NCM 1.0 and MBIM (an 578bd329e12SBjørn Mork * “NCM/MBIM function”) according to this recommendation 579bd329e12SBjørn Mork * shall provide two alternate settings for the 580bd329e12SBjørn Mork * Communication Interface. Alternate setting 0, and the 581bd329e12SBjørn Mork * associated class and endpoint descriptors, shall be 582bd329e12SBjørn Mork * constructed according to the rules given for the 583bd329e12SBjørn Mork * Communication Interface in section 5 of [USBNCM10]. 584bd329e12SBjørn Mork * Alternate setting 1, and the associated class and 585bd329e12SBjørn Mork * endpoint descriptors, shall be constructed according to 586bd329e12SBjørn Mork * the rules given in section 6 (USB Device Model) of this 587bd329e12SBjørn Mork * specification." 588bd329e12SBjørn Mork */ 5891e8bbe6cSBjørn Mork if (prefer_mbim && intf->num_altsetting == 2) { 5901e8bbe6cSBjørn Mork alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 5911e8bbe6cSBjørn Mork if (alt && cdc_ncm_comm_intf_is_mbim(alt) && 592bd329e12SBjørn Mork !usb_set_interface(dev->udev, 593bd329e12SBjørn Mork intf->cur_altsetting->desc.bInterfaceNumber, 5941e8bbe6cSBjørn Mork CDC_NCM_COMM_ALTSETTING_MBIM)) 5951e8bbe6cSBjørn Mork return CDC_NCM_DATA_ALTSETTING_MBIM; 5961e8bbe6cSBjørn Mork } 5971e8bbe6cSBjørn Mork return CDC_NCM_DATA_ALTSETTING_NCM; 5981e8bbe6cSBjørn Mork } 5991e8bbe6cSBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 6001e8bbe6cSBjørn Mork 6011e8bbe6cSBjørn Mork static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 6021e8bbe6cSBjørn Mork { 6031e8bbe6cSBjørn Mork int ret; 6041e8bbe6cSBjørn Mork 6051e8bbe6cSBjørn Mork /* MBIM backwards compatible function? */ 6061e8bbe6cSBjørn Mork cdc_ncm_select_altsetting(dev, intf); 607f350ca03SBjørn Mork if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 608bd329e12SBjørn Mork return -ENODEV; 609bd329e12SBjørn Mork 61038396e4cSGreg Suarez /* NCM data altsetting is always 1 */ 61138396e4cSGreg Suarez ret = cdc_ncm_bind_common(dev, intf, 1); 61238396e4cSGreg Suarez 61338396e4cSGreg Suarez /* 61438396e4cSGreg Suarez * We should get an event when network connection is "connected" or 61538396e4cSGreg Suarez * "disconnected". Set network connection in "disconnected" state 61638396e4cSGreg Suarez * (carrier is OFF) during attach, so the IP network stack does not 61738396e4cSGreg Suarez * start IPv6 negotiation and more. 61838396e4cSGreg Suarez */ 6198a34b0aeSMing Lei usbnet_link_change(dev, 0, 0); 62038396e4cSGreg Suarez return ret; 62138396e4cSGreg Suarez } 62238396e4cSGreg Suarez 623c78b7c58SBjørn Mork static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 624900d495aSAlexey Orishko { 625c78b7c58SBjørn Mork size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 626c78b7c58SBjørn Mork 627c78b7c58SBjørn Mork if (skb->len + align > max) 628c78b7c58SBjørn Mork align = max - skb->len; 629c78b7c58SBjørn Mork if (align && skb_tailroom(skb) >= align) 630c78b7c58SBjørn Mork memset(skb_put(skb, align), 0, align); 631c78b7c58SBjørn Mork } 632c78b7c58SBjørn Mork 633c78b7c58SBjørn Mork /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 634c78b7c58SBjørn Mork * allocating a new one within skb 635c78b7c58SBjørn Mork */ 636c78b7c58SBjørn Mork static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 637c78b7c58SBjørn Mork { 638c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 639c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 640c78b7c58SBjørn Mork size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 641c78b7c58SBjørn Mork 642c78b7c58SBjørn Mork /* follow the chain of NDPs, looking for a match */ 643c78b7c58SBjørn Mork while (ndpoffset) { 644c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 645c78b7c58SBjørn Mork if (ndp16->dwSignature == sign) 646c78b7c58SBjørn Mork return ndp16; 647c78b7c58SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 648c78b7c58SBjørn Mork } 649c78b7c58SBjørn Mork 650c78b7c58SBjørn Mork /* align new NDP */ 651c78b7c58SBjørn Mork cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 652c78b7c58SBjørn Mork 653c78b7c58SBjørn Mork /* verify that there is room for the NDP and the datagram (reserve) */ 654c78b7c58SBjørn Mork if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 655c78b7c58SBjørn Mork return NULL; 656c78b7c58SBjørn Mork 657c78b7c58SBjørn Mork /* link to it */ 658c78b7c58SBjørn Mork if (ndp16) 659c78b7c58SBjørn Mork ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 660c78b7c58SBjørn Mork else 661c78b7c58SBjørn Mork nth16->wNdpIndex = cpu_to_le16(skb->len); 662c78b7c58SBjørn Mork 663c78b7c58SBjørn Mork /* push a new empty NDP */ 664c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 665c78b7c58SBjørn Mork ndp16->dwSignature = sign; 666c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 667c78b7c58SBjørn Mork return ndp16; 668900d495aSAlexey Orishko } 669900d495aSAlexey Orishko 670c91ce3b6SBjørn Mork struct sk_buff * 671bed6f762SBjørn Mork cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 672900d495aSAlexey Orishko { 673bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 674c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16; 675c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 676900d495aSAlexey Orishko struct sk_buff *skb_out; 677c78b7c58SBjørn Mork u16 n = 0, index, ndplen; 67884e77a8bSAlexey Orishko u8 ready2send = 0; 679900d495aSAlexey Orishko 680900d495aSAlexey Orishko /* if there is a remaining skb, it gets priority */ 681c78b7c58SBjørn Mork if (skb != NULL) { 682900d495aSAlexey Orishko swap(skb, ctx->tx_rem_skb); 683c78b7c58SBjørn Mork swap(sign, ctx->tx_rem_sign); 684c78b7c58SBjørn Mork } else { 68584e77a8bSAlexey Orishko ready2send = 1; 686c78b7c58SBjørn Mork } 687900d495aSAlexey Orishko 688900d495aSAlexey Orishko /* check if we are resuming an OUT skb */ 689900d495aSAlexey Orishko skb_out = ctx->tx_curr_skb; 690900d495aSAlexey Orishko 691c78b7c58SBjørn Mork /* allocate a new OUT skb */ 692c78b7c58SBjørn Mork if (!skb_out) { 69320572226SBjørn Mork skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 694900d495aSAlexey Orishko if (skb_out == NULL) { 695900d495aSAlexey Orishko if (skb != NULL) { 696900d495aSAlexey Orishko dev_kfree_skb_any(skb); 697bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 698900d495aSAlexey Orishko } 699900d495aSAlexey Orishko goto exit_no_skb; 700900d495aSAlexey Orishko } 701c78b7c58SBjørn Mork /* fill out the initial 16-bit NTB header */ 702c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 703c78b7c58SBjørn Mork nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 704c78b7c58SBjørn Mork nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 705c78b7c58SBjørn Mork nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 706900d495aSAlexey Orishko 707c78b7c58SBjørn Mork /* count total number of frames in this NTB */ 708900d495aSAlexey Orishko ctx->tx_curr_frame_num = 0; 709900d495aSAlexey Orishko } 710900d495aSAlexey Orishko 711c78b7c58SBjørn Mork for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 712c78b7c58SBjørn Mork /* send any remaining skb first */ 713900d495aSAlexey Orishko if (skb == NULL) { 714900d495aSAlexey Orishko skb = ctx->tx_rem_skb; 715c78b7c58SBjørn Mork sign = ctx->tx_rem_sign; 716900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 717900d495aSAlexey Orishko 718900d495aSAlexey Orishko /* check for end of skb */ 719900d495aSAlexey Orishko if (skb == NULL) 720900d495aSAlexey Orishko break; 721900d495aSAlexey Orishko } 722900d495aSAlexey Orishko 723c78b7c58SBjørn Mork /* get the appropriate NDP for this skb */ 724c78b7c58SBjørn Mork ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 725c78b7c58SBjørn Mork 726c78b7c58SBjørn Mork /* align beginning of next frame */ 727c78b7c58SBjørn Mork cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 728c78b7c58SBjørn Mork 729c78b7c58SBjørn Mork /* check if we had enough room left for both NDP and frame */ 730c78b7c58SBjørn Mork if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 731900d495aSAlexey Orishko if (n == 0) { 732900d495aSAlexey Orishko /* won't fit, MTU problem? */ 733900d495aSAlexey Orishko dev_kfree_skb_any(skb); 734900d495aSAlexey Orishko skb = NULL; 735bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 736900d495aSAlexey Orishko } else { 737900d495aSAlexey Orishko /* no room for skb - store for later */ 738900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 739900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 740bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 741900d495aSAlexey Orishko } 742900d495aSAlexey Orishko ctx->tx_rem_skb = skb; 743c78b7c58SBjørn Mork ctx->tx_rem_sign = sign; 744900d495aSAlexey Orishko skb = NULL; 74584e77a8bSAlexey Orishko ready2send = 1; 746900d495aSAlexey Orishko } 747900d495aSAlexey Orishko break; 748900d495aSAlexey Orishko } 749900d495aSAlexey Orishko 750c78b7c58SBjørn Mork /* calculate frame number withing this NDP */ 751c78b7c58SBjørn Mork ndplen = le16_to_cpu(ndp16->wLength); 752c78b7c58SBjørn Mork index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 753900d495aSAlexey Orishko 754c78b7c58SBjørn Mork /* OK, add this skb */ 755c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 756c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 757c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 758c78b7c58SBjørn Mork memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 759900d495aSAlexey Orishko dev_kfree_skb_any(skb); 760900d495aSAlexey Orishko skb = NULL; 761c78b7c58SBjørn Mork 762c78b7c58SBjørn Mork /* send now if this NDP is full */ 763c78b7c58SBjørn Mork if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 764c78b7c58SBjørn Mork ready2send = 1; 765c78b7c58SBjørn Mork break; 766c78b7c58SBjørn Mork } 767900d495aSAlexey Orishko } 768900d495aSAlexey Orishko 769900d495aSAlexey Orishko /* free up any dangling skb */ 770900d495aSAlexey Orishko if (skb != NULL) { 771900d495aSAlexey Orishko dev_kfree_skb_any(skb); 772900d495aSAlexey Orishko skb = NULL; 773bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 774900d495aSAlexey Orishko } 775900d495aSAlexey Orishko 776900d495aSAlexey Orishko ctx->tx_curr_frame_num = n; 777900d495aSAlexey Orishko 778900d495aSAlexey Orishko if (n == 0) { 779900d495aSAlexey Orishko /* wait for more frames */ 780900d495aSAlexey Orishko /* push variables */ 781900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 782900d495aSAlexey Orishko goto exit_no_skb; 783900d495aSAlexey Orishko 78484e77a8bSAlexey Orishko } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 785900d495aSAlexey Orishko /* wait for more frames */ 786900d495aSAlexey Orishko /* push variables */ 787900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 788900d495aSAlexey Orishko /* set the pending count */ 789900d495aSAlexey Orishko if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 790c84ff1d6SAlexey Orishko ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 791900d495aSAlexey Orishko goto exit_no_skb; 792900d495aSAlexey Orishko 793900d495aSAlexey Orishko } else { 794900d495aSAlexey Orishko /* frame goes out */ 795900d495aSAlexey Orishko /* variables will be reset at next call */ 796900d495aSAlexey Orishko } 797900d495aSAlexey Orishko 79820572226SBjørn Mork /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT 79920572226SBjørn Mork * bytes, we send buffers as it is. If we get more data, it 80020572226SBjørn Mork * would be more efficient for USB HS mobile device with DMA 80120572226SBjørn Mork * engine to receive a full size NTB, than canceling DMA 80220572226SBjørn Mork * transfer and receiving a short packet. 8034d619f62SBjørn Mork * 8044d619f62SBjørn Mork * This optimization support is pointless if we end up sending 8054d619f62SBjørn Mork * a ZLP after full sized NTBs. 806900d495aSAlexey Orishko */ 8074d619f62SBjørn Mork if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 8084d619f62SBjørn Mork skb_out->len > CDC_NCM_MIN_TX_PKT) 80920572226SBjørn Mork memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 81020572226SBjørn Mork ctx->tx_max - skb_out->len); 81120572226SBjørn Mork else if ((skb_out->len % dev->maxpacket) == 0) 812c78b7c58SBjørn Mork *skb_put(skb_out, 1) = 0; /* force short packet */ 813900d495aSAlexey Orishko 814c78b7c58SBjørn Mork /* set final frame length */ 815c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 816c78b7c58SBjørn Mork nth16->wBlockLength = cpu_to_le16(skb_out->len); 817900d495aSAlexey Orishko 818900d495aSAlexey Orishko /* return skb */ 819900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 820bed6f762SBjørn Mork dev->net->stats.tx_packets += ctx->tx_curr_frame_num; 821900d495aSAlexey Orishko return skb_out; 822900d495aSAlexey Orishko 823900d495aSAlexey Orishko exit_no_skb: 824c84ff1d6SAlexey Orishko /* Start timer, if there is a remaining skb */ 825c84ff1d6SAlexey Orishko if (ctx->tx_curr_skb != NULL) 826c84ff1d6SAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 827900d495aSAlexey Orishko return NULL; 828900d495aSAlexey Orishko } 829c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 830900d495aSAlexey Orishko 831900d495aSAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 832900d495aSAlexey Orishko { 833900d495aSAlexey Orishko /* start timer, if not already started */ 834c84ff1d6SAlexey Orishko if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 835c84ff1d6SAlexey Orishko hrtimer_start(&ctx->tx_timer, 836c84ff1d6SAlexey Orishko ktime_set(0, CDC_NCM_TIMER_INTERVAL), 837c84ff1d6SAlexey Orishko HRTIMER_MODE_REL); 838900d495aSAlexey Orishko } 839900d495aSAlexey Orishko 840c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 841900d495aSAlexey Orishko { 842c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = 843c84ff1d6SAlexey Orishko container_of(timer, struct cdc_ncm_ctx, tx_timer); 844900d495aSAlexey Orishko 845c84ff1d6SAlexey Orishko if (!atomic_read(&ctx->stop)) 846c84ff1d6SAlexey Orishko tasklet_schedule(&ctx->bh); 847c84ff1d6SAlexey Orishko return HRTIMER_NORESTART; 848c84ff1d6SAlexey Orishko } 849c84ff1d6SAlexey Orishko 850c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param) 851c84ff1d6SAlexey Orishko { 852bed6f762SBjørn Mork struct usbnet *dev = (struct usbnet *)param; 853bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 854c84ff1d6SAlexey Orishko 855c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 856900d495aSAlexey Orishko if (ctx->tx_timer_pending != 0) { 857900d495aSAlexey Orishko ctx->tx_timer_pending--; 858900d495aSAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 859c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 860bed6f762SBjørn Mork } else if (dev->net != NULL) { 861c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 862bed6f762SBjørn Mork netif_tx_lock_bh(dev->net); 863bed6f762SBjørn Mork usbnet_start_xmit(NULL, dev->net); 864bed6f762SBjørn Mork netif_tx_unlock_bh(dev->net); 8657b1e0cbaSBjørn Mork } else { 8667b1e0cbaSBjørn Mork spin_unlock_bh(&ctx->mtx); 867900d495aSAlexey Orishko } 868f742aa8aSAlexey Orishko } 869900d495aSAlexey Orishko 870900d495aSAlexey Orishko static struct sk_buff * 871900d495aSAlexey Orishko cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 872900d495aSAlexey Orishko { 873900d495aSAlexey Orishko struct sk_buff *skb_out; 874900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 875900d495aSAlexey Orishko 876900d495aSAlexey Orishko /* 877900d495aSAlexey Orishko * The Ethernet API we are using does not support transmitting 878900d495aSAlexey Orishko * multiple Ethernet frames in a single call. This driver will 879900d495aSAlexey Orishko * accumulate multiple Ethernet frames and send out a larger 880900d495aSAlexey Orishko * USB frame when the USB buffer is full or when a single jiffies 881900d495aSAlexey Orishko * timeout happens. 882900d495aSAlexey Orishko */ 883900d495aSAlexey Orishko if (ctx == NULL) 884900d495aSAlexey Orishko goto error; 885900d495aSAlexey Orishko 886c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 887bed6f762SBjørn Mork skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 888c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 889900d495aSAlexey Orishko return skb_out; 890900d495aSAlexey Orishko 891900d495aSAlexey Orishko error: 892900d495aSAlexey Orishko if (skb != NULL) 893900d495aSAlexey Orishko dev_kfree_skb_any(skb); 894900d495aSAlexey Orishko 895900d495aSAlexey Orishko return NULL; 896900d495aSAlexey Orishko } 897900d495aSAlexey Orishko 898ff06ab13SBjørn Mork /* verify NTB header and return offset of first NDP, or negative error */ 899c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 900900d495aSAlexey Orishko { 901d5ddb4a5SAlexey Orishko struct usb_cdc_ncm_nth16 *nth16; 902ff06ab13SBjørn Mork int len; 903ff06ab13SBjørn Mork int ret = -EINVAL; 904900d495aSAlexey Orishko 905900d495aSAlexey Orishko if (ctx == NULL) 906900d495aSAlexey Orishko goto error; 907900d495aSAlexey Orishko 908d5ddb4a5SAlexey Orishko if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 909d5ddb4a5SAlexey Orishko sizeof(struct usb_cdc_ncm_ndp16))) { 910900d495aSAlexey Orishko pr_debug("frame too short\n"); 911900d495aSAlexey Orishko goto error; 912900d495aSAlexey Orishko } 913900d495aSAlexey Orishko 914d5ddb4a5SAlexey Orishko nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 915900d495aSAlexey Orishko 916d5ddb4a5SAlexey Orishko if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 917900d495aSAlexey Orishko pr_debug("invalid NTH16 signature <%u>\n", 918d5ddb4a5SAlexey Orishko le32_to_cpu(nth16->dwSignature)); 919900d495aSAlexey Orishko goto error; 920900d495aSAlexey Orishko } 921900d495aSAlexey Orishko 922d5ddb4a5SAlexey Orishko len = le16_to_cpu(nth16->wBlockLength); 923d5ddb4a5SAlexey Orishko if (len > ctx->rx_max) { 924d5ddb4a5SAlexey Orishko pr_debug("unsupported NTB block length %u/%u\n", len, 925d5ddb4a5SAlexey Orishko ctx->rx_max); 926900d495aSAlexey Orishko goto error; 927900d495aSAlexey Orishko } 928900d495aSAlexey Orishko 929d5ddb4a5SAlexey Orishko if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 930d5ddb4a5SAlexey Orishko (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 931d5ddb4a5SAlexey Orishko !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 932d5ddb4a5SAlexey Orishko pr_debug("sequence number glitch prev=%d curr=%d\n", 933d5ddb4a5SAlexey Orishko ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 934d5ddb4a5SAlexey Orishko } 935d5ddb4a5SAlexey Orishko ctx->rx_seq = le16_to_cpu(nth16->wSequence); 936d5ddb4a5SAlexey Orishko 937ff06ab13SBjørn Mork ret = le16_to_cpu(nth16->wNdpIndex); 938ff06ab13SBjørn Mork error: 939ff06ab13SBjørn Mork return ret; 940ff06ab13SBjørn Mork } 941c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 942ff06ab13SBjørn Mork 943ff06ab13SBjørn Mork /* verify NDP header and return number of datagrams, or negative error */ 944c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 945ff06ab13SBjørn Mork { 946ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 947ff06ab13SBjørn Mork int ret = -EINVAL; 948ff06ab13SBjørn Mork 94975d67d35SBjørn Mork if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 95075d67d35SBjørn Mork pr_debug("invalid NDP offset <%u>\n", ndpoffset); 951900d495aSAlexey Orishko goto error; 952900d495aSAlexey Orishko } 95375d67d35SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 954900d495aSAlexey Orishko 955ff06ab13SBjørn Mork if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 956ff06ab13SBjørn Mork pr_debug("invalid DPT16 length <%u>\n", 957ff06ab13SBjørn Mork le32_to_cpu(ndp16->dwSignature)); 958ff06ab13SBjørn Mork goto error; 959ff06ab13SBjørn Mork } 960ff06ab13SBjørn Mork 961ff06ab13SBjørn Mork ret = ((le16_to_cpu(ndp16->wLength) - 962ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_ndp16)) / 963ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_dpe16)); 964ff06ab13SBjørn Mork ret--; /* we process NDP entries except for the last one */ 965ff06ab13SBjørn Mork 966ff06ab13SBjørn Mork if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > 967ff06ab13SBjørn Mork skb_in->len) { 968ff06ab13SBjørn Mork pr_debug("Invalid nframes = %d\n", ret); 969ff06ab13SBjørn Mork ret = -EINVAL; 970ff06ab13SBjørn Mork } 971ff06ab13SBjørn Mork 972ff06ab13SBjørn Mork error: 973ff06ab13SBjørn Mork return ret; 974ff06ab13SBjørn Mork } 975c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 976ff06ab13SBjørn Mork 977ff06ab13SBjørn Mork static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 978ff06ab13SBjørn Mork { 979ff06ab13SBjørn Mork struct sk_buff *skb; 980ff06ab13SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 981ff06ab13SBjørn Mork int len; 982ff06ab13SBjørn Mork int nframes; 983ff06ab13SBjørn Mork int x; 984ff06ab13SBjørn Mork int offset; 985ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 986ff06ab13SBjørn Mork struct usb_cdc_ncm_dpe16 *dpe16; 987ff06ab13SBjørn Mork int ndpoffset; 988ff06ab13SBjørn Mork int loopcount = 50; /* arbitrary max preventing infinite loop */ 989ff06ab13SBjørn Mork 990ff06ab13SBjørn Mork ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 991ff06ab13SBjørn Mork if (ndpoffset < 0) 992ff06ab13SBjørn Mork goto error; 993ff06ab13SBjørn Mork 994ff06ab13SBjørn Mork next_ndp: 995ff06ab13SBjørn Mork nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 996ff06ab13SBjørn Mork if (nframes < 0) 997ff06ab13SBjørn Mork goto error; 998ff06ab13SBjørn Mork 999ff06ab13SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1000ff06ab13SBjørn Mork 1001d5ddb4a5SAlexey Orishko if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 1002900d495aSAlexey Orishko pr_debug("invalid DPT16 signature <%u>\n", 1003d5ddb4a5SAlexey Orishko le32_to_cpu(ndp16->dwSignature)); 100475d67d35SBjørn Mork goto err_ndp; 1005900d495aSAlexey Orishko } 1006ff06ab13SBjørn Mork dpe16 = ndp16->dpe16; 1007900d495aSAlexey Orishko 1008d5ddb4a5SAlexey Orishko for (x = 0; x < nframes; x++, dpe16++) { 1009d5ddb4a5SAlexey Orishko offset = le16_to_cpu(dpe16->wDatagramIndex); 1010d5ddb4a5SAlexey Orishko len = le16_to_cpu(dpe16->wDatagramLength); 1011900d495aSAlexey Orishko 1012900d495aSAlexey Orishko /* 1013900d495aSAlexey Orishko * CDC NCM ch. 3.7 1014900d495aSAlexey Orishko * All entries after first NULL entry are to be ignored 1015900d495aSAlexey Orishko */ 1016d5ddb4a5SAlexey Orishko if ((offset == 0) || (len == 0)) { 1017900d495aSAlexey Orishko if (!x) 101875d67d35SBjørn Mork goto err_ndp; /* empty NTB */ 1019900d495aSAlexey Orishko break; 1020900d495aSAlexey Orishko } 1021900d495aSAlexey Orishko 1022900d495aSAlexey Orishko /* sanity checking */ 1023d5ddb4a5SAlexey Orishko if (((offset + len) > skb_in->len) || 1024d5ddb4a5SAlexey Orishko (len > ctx->rx_max) || (len < ETH_HLEN)) { 1025900d495aSAlexey Orishko pr_debug("invalid frame detected (ignored)" 1026900d495aSAlexey Orishko "offset[%u]=%u, length=%u, skb=%p\n", 1027d5ddb4a5SAlexey Orishko x, offset, len, skb_in); 1028900d495aSAlexey Orishko if (!x) 102975d67d35SBjørn Mork goto err_ndp; 1030900d495aSAlexey Orishko break; 1031900d495aSAlexey Orishko 1032900d495aSAlexey Orishko } else { 1033900d495aSAlexey Orishko skb = skb_clone(skb_in, GFP_ATOMIC); 10349e56790aSJesper Juhl if (!skb) 10359e56790aSJesper Juhl goto error; 1036d5ddb4a5SAlexey Orishko skb->len = len; 1037900d495aSAlexey Orishko skb->data = ((u8 *)skb_in->data) + offset; 1038d5ddb4a5SAlexey Orishko skb_set_tail_pointer(skb, len); 1039900d495aSAlexey Orishko usbnet_skb_return(dev, skb); 1040900d495aSAlexey Orishko } 1041900d495aSAlexey Orishko } 104275d67d35SBjørn Mork err_ndp: 104375d67d35SBjørn Mork /* are there more NDPs to process? */ 104475d67d35SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 104575d67d35SBjørn Mork if (ndpoffset && loopcount--) 104675d67d35SBjørn Mork goto next_ndp; 104775d67d35SBjørn Mork 1048900d495aSAlexey Orishko return 1; 1049900d495aSAlexey Orishko error: 1050900d495aSAlexey Orishko return 0; 1051900d495aSAlexey Orishko } 1052900d495aSAlexey Orishko 1053900d495aSAlexey Orishko static void 1054bed6f762SBjørn Mork cdc_ncm_speed_change(struct usbnet *dev, 105584e77a8bSAlexey Orishko struct usb_cdc_speed_change *data) 1056900d495aSAlexey Orishko { 105784e77a8bSAlexey Orishko uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 105884e77a8bSAlexey Orishko uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1059900d495aSAlexey Orishko 1060900d495aSAlexey Orishko /* 1061900d495aSAlexey Orishko * Currently the USB-NET API does not support reporting the actual 1062900d495aSAlexey Orishko * device speed. Do print it instead. 1063900d495aSAlexey Orishko */ 1064900d495aSAlexey Orishko if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1065900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME 1066900d495aSAlexey Orishko ": %s: %u mbit/s downlink " 1067900d495aSAlexey Orishko "%u mbit/s uplink\n", 1068bed6f762SBjørn Mork dev->net->name, 1069900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000000U), 1070900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000000U)); 1071900d495aSAlexey Orishko } else { 1072900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME 1073900d495aSAlexey Orishko ": %s: %u kbit/s downlink " 1074900d495aSAlexey Orishko "%u kbit/s uplink\n", 1075bed6f762SBjørn Mork dev->net->name, 1076900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000U), 1077900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000U)); 1078900d495aSAlexey Orishko } 1079900d495aSAlexey Orishko } 1080900d495aSAlexey Orishko 1081900d495aSAlexey Orishko static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1082900d495aSAlexey Orishko { 1083900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1084900d495aSAlexey Orishko struct usb_cdc_notification *event; 1085900d495aSAlexey Orishko 1086900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1087900d495aSAlexey Orishko 1088900d495aSAlexey Orishko if (urb->actual_length < sizeof(*event)) 1089900d495aSAlexey Orishko return; 1090900d495aSAlexey Orishko 1091900d495aSAlexey Orishko /* test for split data in 8-byte chunks */ 1092900d495aSAlexey Orishko if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1093bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 109484e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)urb->transfer_buffer); 1095900d495aSAlexey Orishko return; 1096900d495aSAlexey Orishko } 1097900d495aSAlexey Orishko 1098900d495aSAlexey Orishko event = urb->transfer_buffer; 1099900d495aSAlexey Orishko 1100900d495aSAlexey Orishko switch (event->bNotificationType) { 1101900d495aSAlexey Orishko case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1102900d495aSAlexey Orishko /* 1103900d495aSAlexey Orishko * According to the CDC NCM specification ch.7.1 1104900d495aSAlexey Orishko * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1105900d495aSAlexey Orishko * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1106900d495aSAlexey Orishko */ 11071a7c6cc6SBjørn Mork ctx->connected = le16_to_cpu(event->wValue); 1108900d495aSAlexey Orishko 1109900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1110900d495aSAlexey Orishko " %sconnected\n", 1111bed6f762SBjørn Mork dev->net->name, ctx->connected ? "" : "dis"); 1112900d495aSAlexey Orishko 11138a34b0aeSMing Lei usbnet_link_change(dev, ctx->connected, 0); 1114900d495aSAlexey Orishko break; 1115900d495aSAlexey Orishko 1116900d495aSAlexey Orishko case USB_CDC_NOTIFY_SPEED_CHANGE: 111784e77a8bSAlexey Orishko if (urb->actual_length < (sizeof(*event) + 111884e77a8bSAlexey Orishko sizeof(struct usb_cdc_speed_change))) 1119900d495aSAlexey Orishko set_bit(EVENT_STS_SPLIT, &dev->flags); 1120900d495aSAlexey Orishko else 1121bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 112284e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)&event[1]); 1123900d495aSAlexey Orishko break; 1124900d495aSAlexey Orishko 1125900d495aSAlexey Orishko default: 112667a36606SBjørn Mork dev_dbg(&dev->udev->dev, 112767a36606SBjørn Mork "NCM: unexpected notification 0x%02x!\n", 112867a36606SBjørn Mork event->bNotificationType); 1129900d495aSAlexey Orishko break; 1130900d495aSAlexey Orishko } 1131900d495aSAlexey Orishko } 1132900d495aSAlexey Orishko 1133900d495aSAlexey Orishko static int cdc_ncm_check_connect(struct usbnet *dev) 1134900d495aSAlexey Orishko { 1135900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1136900d495aSAlexey Orishko 1137900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1138900d495aSAlexey Orishko if (ctx == NULL) 1139900d495aSAlexey Orishko return 1; /* disconnected */ 1140900d495aSAlexey Orishko 1141900d495aSAlexey Orishko return !ctx->connected; 1142900d495aSAlexey Orishko } 1143900d495aSAlexey Orishko 1144900d495aSAlexey Orishko static int 1145900d495aSAlexey Orishko cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1146900d495aSAlexey Orishko { 1147900d495aSAlexey Orishko return usbnet_probe(udev, prod); 1148900d495aSAlexey Orishko } 1149900d495aSAlexey Orishko 1150900d495aSAlexey Orishko static void cdc_ncm_disconnect(struct usb_interface *intf) 1151900d495aSAlexey Orishko { 1152900d495aSAlexey Orishko struct usbnet *dev = usb_get_intfdata(intf); 1153900d495aSAlexey Orishko 1154900d495aSAlexey Orishko if (dev == NULL) 1155900d495aSAlexey Orishko return; /* already disconnected */ 1156900d495aSAlexey Orishko 1157900d495aSAlexey Orishko usbnet_disconnect(intf); 1158900d495aSAlexey Orishko } 1159900d495aSAlexey Orishko 1160900d495aSAlexey Orishko static const struct driver_info cdc_ncm_info = { 1161900d495aSAlexey Orishko .description = "CDC NCM", 1162c261344dSArnd Bergmann .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1163900d495aSAlexey Orishko .bind = cdc_ncm_bind, 1164900d495aSAlexey Orishko .unbind = cdc_ncm_unbind, 1165900d495aSAlexey Orishko .check_connect = cdc_ncm_check_connect, 1166a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1167900d495aSAlexey Orishko .status = cdc_ncm_status, 1168900d495aSAlexey Orishko .rx_fixup = cdc_ncm_rx_fixup, 1169900d495aSAlexey Orishko .tx_fixup = cdc_ncm_tx_fixup, 1170900d495aSAlexey Orishko }; 1171900d495aSAlexey Orishko 1172f94898eaSDan Williams /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1173f94898eaSDan Williams static const struct driver_info wwan_info = { 1174f94898eaSDan Williams .description = "Mobile Broadband Network Device", 1175f94898eaSDan Williams .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1176f94898eaSDan Williams | FLAG_WWAN, 1177f94898eaSDan Williams .bind = cdc_ncm_bind, 1178f94898eaSDan Williams .unbind = cdc_ncm_unbind, 1179f94898eaSDan Williams .check_connect = cdc_ncm_check_connect, 1180a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1181f94898eaSDan Williams .status = cdc_ncm_status, 1182f94898eaSDan Williams .rx_fixup = cdc_ncm_rx_fixup, 1183f94898eaSDan Williams .tx_fixup = cdc_ncm_tx_fixup, 1184f94898eaSDan Williams }; 1185f94898eaSDan Williams 11862f62d5aaSWei Shuai /* Same as wwan_info, but with FLAG_NOARP */ 11872f62d5aaSWei Shuai static const struct driver_info wwan_noarp_info = { 11882f62d5aaSWei Shuai .description = "Mobile Broadband Network Device (NO ARP)", 11892f62d5aaSWei Shuai .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 11902f62d5aaSWei Shuai | FLAG_WWAN | FLAG_NOARP, 11912f62d5aaSWei Shuai .bind = cdc_ncm_bind, 11922f62d5aaSWei Shuai .unbind = cdc_ncm_unbind, 11932f62d5aaSWei Shuai .check_connect = cdc_ncm_check_connect, 11942f62d5aaSWei Shuai .manage_power = usbnet_manage_power, 11952f62d5aaSWei Shuai .status = cdc_ncm_status, 11962f62d5aaSWei Shuai .rx_fixup = cdc_ncm_rx_fixup, 11972f62d5aaSWei Shuai .tx_fixup = cdc_ncm_tx_fixup, 11982f62d5aaSWei Shuai }; 11992f62d5aaSWei Shuai 1200f94898eaSDan Williams static const struct usb_device_id cdc_devs[] = { 1201f94898eaSDan Williams /* Ericsson MBM devices like F5521gw */ 1202f94898eaSDan Williams { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1203f94898eaSDan Williams | USB_DEVICE_ID_MATCH_VENDOR, 1204f94898eaSDan Williams .idVendor = 0x0bdb, 1205f94898eaSDan Williams .bInterfaceClass = USB_CLASS_COMM, 1206f94898eaSDan Williams .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1207f94898eaSDan Williams .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1208f94898eaSDan Williams .driver_info = (unsigned long) &wwan_info, 1209f94898eaSDan Williams }, 1210f94898eaSDan Williams 1211f3a1ef9cSPeter Meiser /* Dell branded MBM devices like DW5550 */ 1212f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1213f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1214f3a1ef9cSPeter Meiser .idVendor = 0x413c, 1215f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1216f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1217f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1218f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1219f3a1ef9cSPeter Meiser }, 1220f3a1ef9cSPeter Meiser 1221f3a1ef9cSPeter Meiser /* Toshiba branded MBM devices */ 1222f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1223f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1224f3a1ef9cSPeter Meiser .idVendor = 0x0930, 1225f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1226f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1227f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1228f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1229f3a1ef9cSPeter Meiser }, 1230f3a1ef9cSPeter Meiser 12311f84eab4SBjørn Mork /* tag Huawei devices as wwan */ 12321f84eab4SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 12331f84eab4SBjørn Mork USB_CLASS_COMM, 12341f84eab4SBjørn Mork USB_CDC_SUBCLASS_NCM, 12351f84eab4SBjørn Mork USB_CDC_PROTO_NONE), 12361f84eab4SBjørn Mork .driver_info = (unsigned long)&wwan_info, 12371f84eab4SBjørn Mork }, 12381f84eab4SBjørn Mork 1239bbc8d922SBjørn Mork /* Huawei NCM devices disguised as vendor specific */ 1240bbc8d922SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), 1241bbc8d922SBjørn Mork .driver_info = (unsigned long)&wwan_info, 1242bbc8d922SBjørn Mork }, 1243bbc8d922SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), 1244bbc8d922SBjørn Mork .driver_info = (unsigned long)&wwan_info, 1245bbc8d922SBjørn Mork }, 124696316c59SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76), 124796316c59SBjørn Mork .driver_info = (unsigned long)&wwan_info, 124896316c59SBjørn Mork }, 1249bbc8d922SBjørn Mork 12502f62d5aaSWei Shuai /* Infineon(now Intel) HSPA Modem platform */ 12512f62d5aaSWei Shuai { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 12522f62d5aaSWei Shuai USB_CLASS_COMM, 12532f62d5aaSWei Shuai USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 12542f62d5aaSWei Shuai .driver_info = (unsigned long)&wwan_noarp_info, 12552f62d5aaSWei Shuai }, 12562f62d5aaSWei Shuai 1257f94898eaSDan Williams /* Generic CDC-NCM devices */ 1258f94898eaSDan Williams { USB_INTERFACE_INFO(USB_CLASS_COMM, 1259f94898eaSDan Williams USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1260f94898eaSDan Williams .driver_info = (unsigned long)&cdc_ncm_info, 1261f94898eaSDan Williams }, 1262f94898eaSDan Williams { 1263f94898eaSDan Williams }, 1264f94898eaSDan Williams }; 1265f94898eaSDan Williams MODULE_DEVICE_TABLE(usb, cdc_devs); 1266f94898eaSDan Williams 1267900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver = { 1268900d495aSAlexey Orishko .name = "cdc_ncm", 1269900d495aSAlexey Orishko .id_table = cdc_devs, 1270900d495aSAlexey Orishko .probe = cdc_ncm_probe, 1271900d495aSAlexey Orishko .disconnect = cdc_ncm_disconnect, 1272900d495aSAlexey Orishko .suspend = usbnet_suspend, 1273900d495aSAlexey Orishko .resume = usbnet_resume, 127485e3c65fSStefan Metzmacher .reset_resume = usbnet_resume, 1275900d495aSAlexey Orishko .supports_autosuspend = 1, 1276e1f12eb6SSarah Sharp .disable_hub_initiated_lpm = 1, 1277900d495aSAlexey Orishko }; 1278900d495aSAlexey Orishko 1279d632eb1bSGreg Kroah-Hartman module_usb_driver(cdc_ncm_driver); 1280900d495aSAlexey Orishko 1281900d495aSAlexey Orishko MODULE_AUTHOR("Hans Petter Selasky"); 1282900d495aSAlexey Orishko MODULE_DESCRIPTION("USB CDC NCM host driver"); 1283900d495aSAlexey Orishko MODULE_LICENSE("Dual BSD/GPL"); 1284