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 58c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param); 59c84ff1d6SAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 60c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 61900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver; 62900d495aSAlexey Orishko 63900d495aSAlexey Orishko static void 64900d495aSAlexey Orishko cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 65900d495aSAlexey Orishko { 66900d495aSAlexey Orishko struct usbnet *dev = netdev_priv(net); 67900d495aSAlexey Orishko 687826d43fSJiri Pirko strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); 697826d43fSJiri Pirko strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 707826d43fSJiri Pirko strlcpy(info->fw_version, dev->driver_info->description, 71900d495aSAlexey Orishko sizeof(info->fw_version)); 72900d495aSAlexey Orishko usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 73900d495aSAlexey Orishko } 74900d495aSAlexey Orishko 75900d495aSAlexey Orishko static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) 76900d495aSAlexey Orishko { 77900d495aSAlexey Orishko u32 val; 78900d495aSAlexey Orishko u8 flags; 79900d495aSAlexey Orishko u8 iface_no; 80900d495aSAlexey Orishko int err; 812d1c4310SGreg Suarez int eth_hlen; 8284e77a8bSAlexey Orishko u16 ntb_fmt_supported; 832d1c4310SGreg Suarez u32 min_dgram_size; 842d1c4310SGreg Suarez u32 min_hdr_size; 8590b8b037SMing Lei struct usbnet *dev = netdev_priv(ctx->netdev); 86900d495aSAlexey Orishko 87900d495aSAlexey Orishko iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 88900d495aSAlexey Orishko 8990b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 9036c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 9136c35416SGiuseppe Scrivano |USB_RECIP_INTERFACE, 9236c35416SGiuseppe Scrivano 0, iface_no, &ctx->ncm_parm, 9390b8b037SMing Lei sizeof(ctx->ncm_parm)); 9436c35416SGiuseppe Scrivano if (err < 0) { 95900d495aSAlexey Orishko pr_debug("failed GET_NTB_PARAMETERS\n"); 96900d495aSAlexey Orishko return 1; 97900d495aSAlexey Orishko } 98900d495aSAlexey Orishko 99900d495aSAlexey Orishko /* read correct set of parameters according to device mode */ 100900d495aSAlexey Orishko ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 101900d495aSAlexey Orishko ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 102900d495aSAlexey Orishko ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 103900d495aSAlexey Orishko ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 104900d495aSAlexey Orishko ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 10584e77a8bSAlexey Orishko /* devices prior to NCM Errata shall set this field to zero */ 10684e77a8bSAlexey Orishko ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 10784e77a8bSAlexey Orishko ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); 108900d495aSAlexey Orishko 1092d1c4310SGreg Suarez eth_hlen = ETH_HLEN; 1102d1c4310SGreg Suarez min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE; 1112d1c4310SGreg Suarez min_hdr_size = CDC_NCM_MIN_HDR_SIZE; 1122d1c4310SGreg Suarez if (ctx->mbim_desc != NULL) { 1132d1c4310SGreg Suarez flags = ctx->mbim_desc->bmNetworkCapabilities; 1142d1c4310SGreg Suarez eth_hlen = 0; 1152d1c4310SGreg Suarez min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; 1162d1c4310SGreg Suarez min_hdr_size = 0; 1172d1c4310SGreg Suarez } else if (ctx->func_desc != NULL) { 118900d495aSAlexey Orishko flags = ctx->func_desc->bmNetworkCapabilities; 1192d1c4310SGreg Suarez } else { 120900d495aSAlexey Orishko flags = 0; 1212d1c4310SGreg Suarez } 122900d495aSAlexey Orishko 123900d495aSAlexey Orishko pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " 124900d495aSAlexey Orishko "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " 12584e77a8bSAlexey Orishko "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 126900d495aSAlexey Orishko ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 12784e77a8bSAlexey Orishko ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); 128900d495aSAlexey Orishko 12984e77a8bSAlexey Orishko /* max count of tx datagrams */ 13084e77a8bSAlexey Orishko if ((ctx->tx_max_datagrams == 0) || 13184e77a8bSAlexey Orishko (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 132900d495aSAlexey Orishko ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 133900d495aSAlexey Orishko 134900d495aSAlexey Orishko /* verify maximum size of received NTB in bytes */ 13584e77a8bSAlexey Orishko if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { 13684e77a8bSAlexey Orishko pr_debug("Using min receive length=%d\n", 13784e77a8bSAlexey Orishko USB_CDC_NCM_NTB_MIN_IN_SIZE); 13884e77a8bSAlexey Orishko ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; 13984e77a8bSAlexey Orishko } 14084e77a8bSAlexey Orishko 14184e77a8bSAlexey Orishko if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { 142900d495aSAlexey Orishko pr_debug("Using default maximum receive length=%d\n", 143900d495aSAlexey Orishko CDC_NCM_NTB_MAX_SIZE_RX); 144900d495aSAlexey Orishko ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; 145900d495aSAlexey Orishko } 146900d495aSAlexey Orishko 14784e77a8bSAlexey Orishko /* inform device about NTB input size changes */ 14884e77a8bSAlexey Orishko if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { 14990b8b037SMing Lei __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); 150dad957d7SBjørn Mork 15190b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 15275bc8ef5SJosh Boyer USB_TYPE_CLASS | USB_DIR_OUT 15375bc8ef5SJosh Boyer | USB_RECIP_INTERFACE, 15490b8b037SMing Lei 0, iface_no, &dwNtbInMaxSize, 4); 15536c35416SGiuseppe Scrivano if (err < 0) 15684e77a8bSAlexey Orishko pr_debug("Setting NTB Input Size failed\n"); 15784e77a8bSAlexey Orishko } 15884e77a8bSAlexey Orishko 159900d495aSAlexey Orishko /* verify maximum size of transmitted NTB in bytes */ 160900d495aSAlexey Orishko if ((ctx->tx_max < 1612d1c4310SGreg Suarez (min_hdr_size + min_dgram_size)) || 162900d495aSAlexey Orishko (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { 163900d495aSAlexey Orishko pr_debug("Using default maximum transmit length=%d\n", 164900d495aSAlexey Orishko CDC_NCM_NTB_MAX_SIZE_TX); 165900d495aSAlexey Orishko ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; 166900d495aSAlexey Orishko } 167900d495aSAlexey Orishko 168900d495aSAlexey Orishko /* 169900d495aSAlexey Orishko * verify that the structure alignment is: 170900d495aSAlexey Orishko * - power of two 171900d495aSAlexey Orishko * - not greater than the maximum transmit length 172900d495aSAlexey Orishko * - not less than four bytes 173900d495aSAlexey Orishko */ 174900d495aSAlexey Orishko val = ctx->tx_ndp_modulus; 175900d495aSAlexey Orishko 176900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 177900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 178900d495aSAlexey Orishko pr_debug("Using default alignment: 4 bytes\n"); 179900d495aSAlexey Orishko ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 180900d495aSAlexey Orishko } 181900d495aSAlexey Orishko 182900d495aSAlexey Orishko /* 183900d495aSAlexey Orishko * verify that the payload alignment is: 184900d495aSAlexey Orishko * - power of two 185900d495aSAlexey Orishko * - not greater than the maximum transmit length 186900d495aSAlexey Orishko * - not less than four bytes 187900d495aSAlexey Orishko */ 188900d495aSAlexey Orishko val = ctx->tx_modulus; 189900d495aSAlexey Orishko 190900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 191900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 192900d495aSAlexey Orishko pr_debug("Using default transmit modulus: 4 bytes\n"); 193900d495aSAlexey Orishko ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 194900d495aSAlexey Orishko } 195900d495aSAlexey Orishko 196900d495aSAlexey Orishko /* verify the payload remainder */ 197900d495aSAlexey Orishko if (ctx->tx_remainder >= ctx->tx_modulus) { 198900d495aSAlexey Orishko pr_debug("Using default transmit remainder: 0 bytes\n"); 199900d495aSAlexey Orishko ctx->tx_remainder = 0; 200900d495aSAlexey Orishko } 201900d495aSAlexey Orishko 202900d495aSAlexey Orishko /* adjust TX-remainder according to NCM specification. */ 2032d1c4310SGreg Suarez ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & 204900d495aSAlexey Orishko (ctx->tx_modulus - 1)); 205900d495aSAlexey Orishko 206900d495aSAlexey Orishko /* additional configuration */ 207900d495aSAlexey Orishko 208900d495aSAlexey Orishko /* set CRC Mode */ 20984e77a8bSAlexey Orishko if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { 21090b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 21136c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_OUT 21236c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 21336c35416SGiuseppe Scrivano USB_CDC_NCM_CRC_NOT_APPENDED, 21490b8b037SMing Lei iface_no, NULL, 0); 21536c35416SGiuseppe Scrivano if (err < 0) 216900d495aSAlexey Orishko pr_debug("Setting CRC mode off failed\n"); 21784e77a8bSAlexey Orishko } 218900d495aSAlexey Orishko 21984e77a8bSAlexey Orishko /* set NTB format, if both formats are supported */ 22084e77a8bSAlexey Orishko if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { 22190b8b037SMing Lei err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 22290b8b037SMing Lei USB_TYPE_CLASS | USB_DIR_OUT 22390b8b037SMing Lei | USB_RECIP_INTERFACE, 22436c35416SGiuseppe Scrivano USB_CDC_NCM_NTB16_FORMAT, 22590b8b037SMing Lei iface_no, NULL, 0); 22636c35416SGiuseppe Scrivano if (err < 0) 227900d495aSAlexey Orishko pr_debug("Setting NTB format to 16-bit failed\n"); 22884e77a8bSAlexey Orishko } 22984e77a8bSAlexey Orishko 2302d1c4310SGreg Suarez ctx->max_datagram_size = min_dgram_size; 231900d495aSAlexey Orishko 232900d495aSAlexey Orishko /* set Max Datagram Size (MTU) */ 23384e77a8bSAlexey Orishko if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { 23490b8b037SMing Lei __le16 max_datagram_size; 2352d1c4310SGreg Suarez u16 eth_max_sz; 2362d1c4310SGreg Suarez if (ctx->ether_desc != NULL) 2372d1c4310SGreg Suarez eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 2382d1c4310SGreg Suarez else if (ctx->mbim_desc != NULL) 2392d1c4310SGreg Suarez eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 2402d1c4310SGreg Suarez else 2412d1c4310SGreg Suarez goto max_dgram_err; 24275bc8ef5SJosh Boyer 24390b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 24436c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 24536c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 24690b8b037SMing Lei 0, iface_no, &max_datagram_size, 2); 24736c35416SGiuseppe Scrivano if (err < 0) { 24884e77a8bSAlexey Orishko pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", 2492d1c4310SGreg Suarez min_dgram_size); 250900d495aSAlexey Orishko } else { 25175bc8ef5SJosh Boyer ctx->max_datagram_size = 25290b8b037SMing Lei le16_to_cpu(max_datagram_size); 25384e77a8bSAlexey Orishko /* Check Eth descriptor value */ 25484e77a8bSAlexey Orishko if (ctx->max_datagram_size > eth_max_sz) 25584e77a8bSAlexey Orishko ctx->max_datagram_size = eth_max_sz; 2563f658cdeSAlexey Orishko 2573f658cdeSAlexey Orishko if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) 2582d1c4310SGreg Suarez ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; 259900d495aSAlexey Orishko 2602d1c4310SGreg Suarez if (ctx->max_datagram_size < min_dgram_size) 2612d1c4310SGreg Suarez ctx->max_datagram_size = min_dgram_size; 26284e77a8bSAlexey Orishko 26384e77a8bSAlexey Orishko /* if value changed, update device */ 2643f658cdeSAlexey Orishko if (ctx->max_datagram_size != 26590b8b037SMing Lei le16_to_cpu(max_datagram_size)) { 26690b8b037SMing Lei err = usbnet_write_cmd(dev, 26736c35416SGiuseppe Scrivano USB_CDC_SET_MAX_DATAGRAM_SIZE, 26836c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_OUT 26936c35416SGiuseppe Scrivano | USB_RECIP_INTERFACE, 27036c35416SGiuseppe Scrivano 0, 27190b8b037SMing Lei iface_no, &max_datagram_size, 27290b8b037SMing Lei 2); 27336c35416SGiuseppe Scrivano if (err < 0) 2743f658cdeSAlexey Orishko pr_debug("SET_MAX_DGRAM_SIZE failed\n"); 2753f658cdeSAlexey Orishko } 2763f658cdeSAlexey Orishko } 27784e77a8bSAlexey Orishko } 27884e77a8bSAlexey Orishko 2793f658cdeSAlexey Orishko max_dgram_err: 2802d1c4310SGreg Suarez if (ctx->netdev->mtu != (ctx->max_datagram_size - eth_hlen)) 2812d1c4310SGreg Suarez ctx->netdev->mtu = ctx->max_datagram_size - eth_hlen; 282900d495aSAlexey Orishko 283900d495aSAlexey Orishko return 0; 284900d495aSAlexey Orishko } 285900d495aSAlexey Orishko 286900d495aSAlexey Orishko static void 287900d495aSAlexey Orishko cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) 288900d495aSAlexey Orishko { 289900d495aSAlexey Orishko struct usb_host_endpoint *e; 290900d495aSAlexey Orishko u8 ep; 291900d495aSAlexey Orishko 292900d495aSAlexey Orishko for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 293900d495aSAlexey Orishko 294900d495aSAlexey Orishko e = intf->cur_altsetting->endpoint + ep; 295900d495aSAlexey Orishko switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 296900d495aSAlexey Orishko case USB_ENDPOINT_XFER_INT: 297900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 298900d495aSAlexey Orishko if (ctx->status_ep == NULL) 299900d495aSAlexey Orishko ctx->status_ep = e; 300900d495aSAlexey Orishko } 301900d495aSAlexey Orishko break; 302900d495aSAlexey Orishko 303900d495aSAlexey Orishko case USB_ENDPOINT_XFER_BULK: 304900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 305900d495aSAlexey Orishko if (ctx->in_ep == NULL) 306900d495aSAlexey Orishko ctx->in_ep = e; 307900d495aSAlexey Orishko } else { 308900d495aSAlexey Orishko if (ctx->out_ep == NULL) 309900d495aSAlexey Orishko ctx->out_ep = e; 310900d495aSAlexey Orishko } 311900d495aSAlexey Orishko break; 312900d495aSAlexey Orishko 313900d495aSAlexey Orishko default: 314900d495aSAlexey Orishko break; 315900d495aSAlexey Orishko } 316900d495aSAlexey Orishko } 317900d495aSAlexey Orishko } 318900d495aSAlexey Orishko 319900d495aSAlexey Orishko static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 320900d495aSAlexey Orishko { 321900d495aSAlexey Orishko if (ctx == NULL) 322900d495aSAlexey Orishko return; 323900d495aSAlexey Orishko 324900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 325900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 326900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 327900d495aSAlexey Orishko } 328900d495aSAlexey Orishko 329900d495aSAlexey Orishko if (ctx->tx_curr_skb != NULL) { 330900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_curr_skb); 331900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 332900d495aSAlexey Orishko } 333900d495aSAlexey Orishko 334900d495aSAlexey Orishko kfree(ctx); 335900d495aSAlexey Orishko } 336900d495aSAlexey Orishko 337f94898eaSDan Williams static const struct ethtool_ops cdc_ncm_ethtool_ops = { 338f94898eaSDan Williams .get_drvinfo = cdc_ncm_get_drvinfo, 339f94898eaSDan Williams .get_link = usbnet_get_link, 340f94898eaSDan Williams .get_msglevel = usbnet_get_msglevel, 341f94898eaSDan Williams .set_msglevel = usbnet_set_msglevel, 342f94898eaSDan Williams .get_settings = usbnet_get_settings, 343f94898eaSDan Williams .set_settings = usbnet_set_settings, 344f94898eaSDan Williams .nway_reset = usbnet_nway_reset, 345f94898eaSDan Williams }; 346f94898eaSDan Williams 347c91ce3b6SBjørn Mork int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) 348900d495aSAlexey Orishko { 349900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 350900d495aSAlexey Orishko struct usb_driver *driver; 351900d495aSAlexey Orishko u8 *buf; 352900d495aSAlexey Orishko int len; 353900d495aSAlexey Orishko int temp; 354900d495aSAlexey Orishko u8 iface_no; 355900d495aSAlexey Orishko 356c796984fSThomas Meyer ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 357900d495aSAlexey Orishko if (ctx == NULL) 35819694ac8SAlexey Orishko return -ENODEV; 359900d495aSAlexey Orishko 360c84ff1d6SAlexey Orishko hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 361c84ff1d6SAlexey Orishko ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 362c84ff1d6SAlexey Orishko ctx->bh.data = (unsigned long)ctx; 363c84ff1d6SAlexey Orishko ctx->bh.func = cdc_ncm_txpath_bh; 364c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 0); 365900d495aSAlexey Orishko spin_lock_init(&ctx->mtx); 366900d495aSAlexey Orishko ctx->netdev = dev->net; 367900d495aSAlexey Orishko 368900d495aSAlexey Orishko /* store ctx pointer in device data field */ 369900d495aSAlexey Orishko dev->data[0] = (unsigned long)ctx; 370900d495aSAlexey Orishko 371900d495aSAlexey Orishko /* get some pointers */ 372900d495aSAlexey Orishko driver = driver_of(intf); 373900d495aSAlexey Orishko buf = intf->cur_altsetting->extra; 374900d495aSAlexey Orishko len = intf->cur_altsetting->extralen; 375900d495aSAlexey Orishko 376900d495aSAlexey Orishko ctx->udev = dev->udev; 377900d495aSAlexey Orishko ctx->intf = intf; 378900d495aSAlexey Orishko 379900d495aSAlexey Orishko /* parse through descriptors associated with control interface */ 380900d495aSAlexey Orishko while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { 381900d495aSAlexey Orishko 382900d495aSAlexey Orishko if (buf[1] != USB_DT_CS_INTERFACE) 383900d495aSAlexey Orishko goto advance; 384900d495aSAlexey Orishko 385900d495aSAlexey Orishko switch (buf[2]) { 386900d495aSAlexey Orishko case USB_CDC_UNION_TYPE: 387900d495aSAlexey Orishko if (buf[0] < sizeof(*(ctx->union_desc))) 388900d495aSAlexey Orishko break; 389900d495aSAlexey Orishko 390900d495aSAlexey Orishko ctx->union_desc = 391900d495aSAlexey Orishko (const struct usb_cdc_union_desc *)buf; 392900d495aSAlexey Orishko 393900d495aSAlexey Orishko ctx->control = usb_ifnum_to_if(dev->udev, 394900d495aSAlexey Orishko ctx->union_desc->bMasterInterface0); 395900d495aSAlexey Orishko ctx->data = usb_ifnum_to_if(dev->udev, 396900d495aSAlexey Orishko ctx->union_desc->bSlaveInterface0); 397900d495aSAlexey Orishko break; 398900d495aSAlexey Orishko 399900d495aSAlexey Orishko case USB_CDC_ETHERNET_TYPE: 400900d495aSAlexey Orishko if (buf[0] < sizeof(*(ctx->ether_desc))) 401900d495aSAlexey Orishko break; 402900d495aSAlexey Orishko 403900d495aSAlexey Orishko ctx->ether_desc = 404900d495aSAlexey Orishko (const struct usb_cdc_ether_desc *)buf; 405900d495aSAlexey Orishko dev->hard_mtu = 406900d495aSAlexey Orishko le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 407900d495aSAlexey Orishko 40884e77a8bSAlexey Orishko if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) 40984e77a8bSAlexey Orishko dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; 41084e77a8bSAlexey Orishko else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) 41184e77a8bSAlexey Orishko dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; 412900d495aSAlexey Orishko break; 413900d495aSAlexey Orishko 414900d495aSAlexey Orishko case USB_CDC_NCM_TYPE: 415900d495aSAlexey Orishko if (buf[0] < sizeof(*(ctx->func_desc))) 416900d495aSAlexey Orishko break; 417900d495aSAlexey Orishko 418900d495aSAlexey Orishko ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; 419900d495aSAlexey Orishko break; 420900d495aSAlexey Orishko 42138396e4cSGreg Suarez case USB_CDC_MBIM_TYPE: 42238396e4cSGreg Suarez if (buf[0] < sizeof(*(ctx->mbim_desc))) 42338396e4cSGreg Suarez break; 42438396e4cSGreg Suarez 42538396e4cSGreg Suarez ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; 42638396e4cSGreg Suarez break; 42738396e4cSGreg Suarez 428900d495aSAlexey Orishko default: 429900d495aSAlexey Orishko break; 430900d495aSAlexey Orishko } 431900d495aSAlexey Orishko advance: 432900d495aSAlexey Orishko /* advance to next descriptor */ 433900d495aSAlexey Orishko temp = buf[0]; 434900d495aSAlexey Orishko buf += temp; 435900d495aSAlexey Orishko len -= temp; 436900d495aSAlexey Orishko } 437900d495aSAlexey Orishko 438900d495aSAlexey Orishko /* check if we got everything */ 439900d495aSAlexey Orishko if ((ctx->control == NULL) || (ctx->data == NULL) || 44038396e4cSGreg Suarez ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf)))) 441900d495aSAlexey Orishko goto error; 442900d495aSAlexey Orishko 443bbc8d922SBjørn Mork /* claim data interface, if different from control */ 444bbc8d922SBjørn Mork if (ctx->data != ctx->control) { 445900d495aSAlexey Orishko temp = usb_driver_claim_interface(driver, ctx->data, dev); 446900d495aSAlexey Orishko if (temp) 447900d495aSAlexey Orishko goto error; 448bbc8d922SBjørn Mork } 449900d495aSAlexey Orishko 450900d495aSAlexey Orishko iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 451900d495aSAlexey Orishko 452900d495aSAlexey Orishko /* reset data interface */ 453900d495aSAlexey Orishko temp = usb_set_interface(dev->udev, iface_no, 0); 454900d495aSAlexey Orishko if (temp) 45519694ac8SAlexey Orishko goto error2; 456900d495aSAlexey Orishko 457900d495aSAlexey Orishko /* initialize data interface */ 458900d495aSAlexey Orishko if (cdc_ncm_setup(ctx)) 45919694ac8SAlexey Orishko goto error2; 460900d495aSAlexey Orishko 461900d495aSAlexey Orishko /* configure data interface */ 46238396e4cSGreg Suarez temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 463900d495aSAlexey Orishko if (temp) 46419694ac8SAlexey Orishko goto error2; 465900d495aSAlexey Orishko 466900d495aSAlexey Orishko cdc_ncm_find_endpoints(ctx, ctx->data); 467900d495aSAlexey Orishko cdc_ncm_find_endpoints(ctx, ctx->control); 468900d495aSAlexey Orishko 469900d495aSAlexey Orishko if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || 470900d495aSAlexey Orishko (ctx->status_ep == NULL)) 47119694ac8SAlexey Orishko goto error2; 472900d495aSAlexey Orishko 473900d495aSAlexey Orishko dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 474900d495aSAlexey Orishko 475900d495aSAlexey Orishko usb_set_intfdata(ctx->data, dev); 476900d495aSAlexey Orishko usb_set_intfdata(ctx->control, dev); 477900d495aSAlexey Orishko usb_set_intfdata(ctx->intf, dev); 478900d495aSAlexey Orishko 47938396e4cSGreg Suarez if (ctx->ether_desc) { 480900d495aSAlexey Orishko temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 481900d495aSAlexey Orishko if (temp) 48219694ac8SAlexey Orishko goto error2; 483517cd81cSDanny Kukawka dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 48438396e4cSGreg Suarez } 48538396e4cSGreg Suarez 486900d495aSAlexey Orishko 487900d495aSAlexey Orishko dev->in = usb_rcvbulkpipe(dev->udev, 488900d495aSAlexey Orishko ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 489900d495aSAlexey Orishko dev->out = usb_sndbulkpipe(dev->udev, 490900d495aSAlexey Orishko ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 491900d495aSAlexey Orishko dev->status = ctx->status_ep; 492900d495aSAlexey Orishko dev->rx_urb_size = ctx->rx_max; 493900d495aSAlexey Orishko 494900d495aSAlexey Orishko ctx->tx_speed = ctx->rx_speed = 0; 495900d495aSAlexey Orishko return 0; 496900d495aSAlexey Orishko 49719694ac8SAlexey Orishko error2: 49819694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 49919694ac8SAlexey Orishko usb_set_intfdata(ctx->data, NULL); 50019694ac8SAlexey Orishko usb_driver_release_interface(driver, ctx->data); 501900d495aSAlexey Orishko error: 502900d495aSAlexey Orishko cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 503900d495aSAlexey Orishko dev->data[0] = 0; 50419694ac8SAlexey Orishko dev_info(&dev->udev->dev, "bind() failure\n"); 505900d495aSAlexey Orishko return -ENODEV; 506900d495aSAlexey Orishko } 507c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 508900d495aSAlexey Orishko 509c91ce3b6SBjørn Mork void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 510900d495aSAlexey Orishko { 511900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 51219694ac8SAlexey Orishko struct usb_driver *driver = driver_of(intf); 513900d495aSAlexey Orishko 514900d495aSAlexey Orishko if (ctx == NULL) 515900d495aSAlexey Orishko return; /* no setup */ 516900d495aSAlexey Orishko 517c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 1); 518c84ff1d6SAlexey Orishko 519c84ff1d6SAlexey Orishko if (hrtimer_active(&ctx->tx_timer)) 520c84ff1d6SAlexey Orishko hrtimer_cancel(&ctx->tx_timer); 521c84ff1d6SAlexey Orishko 522c84ff1d6SAlexey Orishko tasklet_kill(&ctx->bh); 523c84ff1d6SAlexey Orishko 524bbc8d922SBjørn Mork /* handle devices with combined control and data interface */ 525bbc8d922SBjørn Mork if (ctx->control == ctx->data) 526bbc8d922SBjørn Mork ctx->data = NULL; 527bbc8d922SBjørn Mork 52819694ac8SAlexey Orishko /* disconnect master --> disconnect slave */ 52919694ac8SAlexey Orishko if (intf == ctx->control && ctx->data) { 530900d495aSAlexey Orishko usb_set_intfdata(ctx->data, NULL); 531900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->data); 53219694ac8SAlexey Orishko ctx->data = NULL; 533900d495aSAlexey Orishko 53419694ac8SAlexey Orishko } else if (intf == ctx->data && ctx->control) { 53519694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 536900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->control); 53719694ac8SAlexey Orishko ctx->control = NULL; 538900d495aSAlexey Orishko } 539900d495aSAlexey Orishko 54019694ac8SAlexey Orishko usb_set_intfdata(ctx->intf, NULL); 541900d495aSAlexey Orishko cdc_ncm_free(ctx); 542900d495aSAlexey Orishko } 543c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 544900d495aSAlexey Orishko 54538396e4cSGreg Suarez static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 54638396e4cSGreg Suarez { 54738396e4cSGreg Suarez int ret; 54838396e4cSGreg Suarez 549bd329e12SBjørn Mork /* The MBIM spec defines a NCM compatible default altsetting, 550bd329e12SBjørn Mork * which we may have matched: 551bd329e12SBjørn Mork * 552bd329e12SBjørn Mork * "Functions that implement both NCM 1.0 and MBIM (an 553bd329e12SBjørn Mork * “NCM/MBIM function”) according to this recommendation 554bd329e12SBjørn Mork * shall provide two alternate settings for the 555bd329e12SBjørn Mork * Communication Interface. Alternate setting 0, and the 556bd329e12SBjørn Mork * associated class and endpoint descriptors, shall be 557bd329e12SBjørn Mork * constructed according to the rules given for the 558bd329e12SBjørn Mork * Communication Interface in section 5 of [USBNCM10]. 559bd329e12SBjørn Mork * Alternate setting 1, and the associated class and 560bd329e12SBjørn Mork * endpoint descriptors, shall be constructed according to 561bd329e12SBjørn Mork * the rules given in section 6 (USB Device Model) of this 562bd329e12SBjørn Mork * specification." 563bd329e12SBjørn Mork * 564bd329e12SBjørn Mork * Do not bind to such interfaces, allowing cdc_mbim to handle 565bd329e12SBjørn Mork * them 566bd329e12SBjørn Mork */ 567bd329e12SBjørn Mork #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 568bd329e12SBjørn Mork if ((intf->num_altsetting == 2) && 569bd329e12SBjørn Mork !usb_set_interface(dev->udev, 570bd329e12SBjørn Mork intf->cur_altsetting->desc.bInterfaceNumber, 571bd329e12SBjørn Mork CDC_NCM_COMM_ALTSETTING_MBIM) && 572bd329e12SBjørn Mork cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) 573bd329e12SBjørn Mork return -ENODEV; 574bd329e12SBjørn Mork #endif 575bd329e12SBjørn Mork 57638396e4cSGreg Suarez /* NCM data altsetting is always 1 */ 57738396e4cSGreg Suarez ret = cdc_ncm_bind_common(dev, intf, 1); 57838396e4cSGreg Suarez 57938396e4cSGreg Suarez /* 58038396e4cSGreg Suarez * We should get an event when network connection is "connected" or 58138396e4cSGreg Suarez * "disconnected". Set network connection in "disconnected" state 58238396e4cSGreg Suarez * (carrier is OFF) during attach, so the IP network stack does not 58338396e4cSGreg Suarez * start IPv6 negotiation and more. 58438396e4cSGreg Suarez */ 58538396e4cSGreg Suarez netif_carrier_off(dev->net); 58638396e4cSGreg Suarez return ret; 58738396e4cSGreg Suarez } 58838396e4cSGreg Suarez 589c78b7c58SBjørn Mork static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 590900d495aSAlexey Orishko { 591c78b7c58SBjørn Mork size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 592c78b7c58SBjørn Mork 593c78b7c58SBjørn Mork if (skb->len + align > max) 594c78b7c58SBjørn Mork align = max - skb->len; 595c78b7c58SBjørn Mork if (align && skb_tailroom(skb) >= align) 596c78b7c58SBjørn Mork memset(skb_put(skb, align), 0, align); 597c78b7c58SBjørn Mork } 598c78b7c58SBjørn Mork 599c78b7c58SBjørn Mork /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 600c78b7c58SBjørn Mork * allocating a new one within skb 601c78b7c58SBjørn Mork */ 602c78b7c58SBjørn Mork static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 603c78b7c58SBjørn Mork { 604c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 605c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 606c78b7c58SBjørn Mork size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 607c78b7c58SBjørn Mork 608c78b7c58SBjørn Mork /* follow the chain of NDPs, looking for a match */ 609c78b7c58SBjørn Mork while (ndpoffset) { 610c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 611c78b7c58SBjørn Mork if (ndp16->dwSignature == sign) 612c78b7c58SBjørn Mork return ndp16; 613c78b7c58SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 614c78b7c58SBjørn Mork } 615c78b7c58SBjørn Mork 616c78b7c58SBjørn Mork /* align new NDP */ 617c78b7c58SBjørn Mork cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 618c78b7c58SBjørn Mork 619c78b7c58SBjørn Mork /* verify that there is room for the NDP and the datagram (reserve) */ 620c78b7c58SBjørn Mork if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) 621c78b7c58SBjørn Mork return NULL; 622c78b7c58SBjørn Mork 623c78b7c58SBjørn Mork /* link to it */ 624c78b7c58SBjørn Mork if (ndp16) 625c78b7c58SBjørn Mork ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 626c78b7c58SBjørn Mork else 627c78b7c58SBjørn Mork nth16->wNdpIndex = cpu_to_le16(skb->len); 628c78b7c58SBjørn Mork 629c78b7c58SBjørn Mork /* push a new empty NDP */ 630c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); 631c78b7c58SBjørn Mork ndp16->dwSignature = sign; 632c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 633c78b7c58SBjørn Mork return ndp16; 634900d495aSAlexey Orishko } 635900d495aSAlexey Orishko 636c91ce3b6SBjørn Mork struct sk_buff * 637c78b7c58SBjørn Mork cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign) 638900d495aSAlexey Orishko { 639c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16; 640c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 641900d495aSAlexey Orishko struct sk_buff *skb_out; 642c78b7c58SBjørn Mork u16 n = 0, index, ndplen; 64384e77a8bSAlexey Orishko u8 ready2send = 0; 644900d495aSAlexey Orishko 645900d495aSAlexey Orishko /* if there is a remaining skb, it gets priority */ 646c78b7c58SBjørn Mork if (skb != NULL) { 647900d495aSAlexey Orishko swap(skb, ctx->tx_rem_skb); 648c78b7c58SBjørn Mork swap(sign, ctx->tx_rem_sign); 649c78b7c58SBjørn Mork } else { 65084e77a8bSAlexey Orishko ready2send = 1; 651c78b7c58SBjørn Mork } 652900d495aSAlexey Orishko 653900d495aSAlexey Orishko /* check if we are resuming an OUT skb */ 654900d495aSAlexey Orishko skb_out = ctx->tx_curr_skb; 655900d495aSAlexey Orishko 656c78b7c58SBjørn Mork /* allocate a new OUT skb */ 657c78b7c58SBjørn Mork if (!skb_out) { 6586c60408eSAlexey Orishko skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); 659900d495aSAlexey Orishko if (skb_out == NULL) { 660900d495aSAlexey Orishko if (skb != NULL) { 661900d495aSAlexey Orishko dev_kfree_skb_any(skb); 662900d495aSAlexey Orishko ctx->netdev->stats.tx_dropped++; 663900d495aSAlexey Orishko } 664900d495aSAlexey Orishko goto exit_no_skb; 665900d495aSAlexey Orishko } 666c78b7c58SBjørn Mork /* fill out the initial 16-bit NTB header */ 667c78b7c58SBjørn 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)); 668c78b7c58SBjørn Mork nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 669c78b7c58SBjørn Mork nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 670c78b7c58SBjørn Mork nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 671900d495aSAlexey Orishko 672c78b7c58SBjørn Mork /* count total number of frames in this NTB */ 673900d495aSAlexey Orishko ctx->tx_curr_frame_num = 0; 674900d495aSAlexey Orishko } 675900d495aSAlexey Orishko 676c78b7c58SBjørn Mork for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 677c78b7c58SBjørn Mork /* send any remaining skb first */ 678900d495aSAlexey Orishko if (skb == NULL) { 679900d495aSAlexey Orishko skb = ctx->tx_rem_skb; 680c78b7c58SBjørn Mork sign = ctx->tx_rem_sign; 681900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 682900d495aSAlexey Orishko 683900d495aSAlexey Orishko /* check for end of skb */ 684900d495aSAlexey Orishko if (skb == NULL) 685900d495aSAlexey Orishko break; 686900d495aSAlexey Orishko } 687900d495aSAlexey Orishko 688c78b7c58SBjørn Mork /* get the appropriate NDP for this skb */ 689c78b7c58SBjørn Mork ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 690c78b7c58SBjørn Mork 691c78b7c58SBjørn Mork /* align beginning of next frame */ 692c78b7c58SBjørn Mork cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 693c78b7c58SBjørn Mork 694c78b7c58SBjørn Mork /* check if we had enough room left for both NDP and frame */ 695c78b7c58SBjørn Mork if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { 696900d495aSAlexey Orishko if (n == 0) { 697900d495aSAlexey Orishko /* won't fit, MTU problem? */ 698900d495aSAlexey Orishko dev_kfree_skb_any(skb); 699900d495aSAlexey Orishko skb = NULL; 700900d495aSAlexey Orishko ctx->netdev->stats.tx_dropped++; 701900d495aSAlexey Orishko } else { 702900d495aSAlexey Orishko /* no room for skb - store for later */ 703900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 704900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 705900d495aSAlexey Orishko ctx->netdev->stats.tx_dropped++; 706900d495aSAlexey Orishko } 707900d495aSAlexey Orishko ctx->tx_rem_skb = skb; 708c78b7c58SBjørn Mork ctx->tx_rem_sign = sign; 709900d495aSAlexey Orishko skb = NULL; 71084e77a8bSAlexey Orishko ready2send = 1; 711900d495aSAlexey Orishko } 712900d495aSAlexey Orishko break; 713900d495aSAlexey Orishko } 714900d495aSAlexey Orishko 715c78b7c58SBjørn Mork /* calculate frame number withing this NDP */ 716c78b7c58SBjørn Mork ndplen = le16_to_cpu(ndp16->wLength); 717c78b7c58SBjørn Mork index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 718900d495aSAlexey Orishko 719c78b7c58SBjørn Mork /* OK, add this skb */ 720c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 721c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 722c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 723c78b7c58SBjørn Mork memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 724900d495aSAlexey Orishko dev_kfree_skb_any(skb); 725900d495aSAlexey Orishko skb = NULL; 726c78b7c58SBjørn Mork 727c78b7c58SBjørn Mork /* send now if this NDP is full */ 728c78b7c58SBjørn Mork if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 729c78b7c58SBjørn Mork ready2send = 1; 730c78b7c58SBjørn Mork break; 731c78b7c58SBjørn Mork } 732900d495aSAlexey Orishko } 733900d495aSAlexey Orishko 734900d495aSAlexey Orishko /* free up any dangling skb */ 735900d495aSAlexey Orishko if (skb != NULL) { 736900d495aSAlexey Orishko dev_kfree_skb_any(skb); 737900d495aSAlexey Orishko skb = NULL; 738900d495aSAlexey Orishko ctx->netdev->stats.tx_dropped++; 739900d495aSAlexey Orishko } 740900d495aSAlexey Orishko 741900d495aSAlexey Orishko ctx->tx_curr_frame_num = n; 742900d495aSAlexey Orishko 743900d495aSAlexey Orishko if (n == 0) { 744900d495aSAlexey Orishko /* wait for more frames */ 745900d495aSAlexey Orishko /* push variables */ 746900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 747900d495aSAlexey Orishko goto exit_no_skb; 748900d495aSAlexey Orishko 74984e77a8bSAlexey Orishko } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { 750900d495aSAlexey Orishko /* wait for more frames */ 751900d495aSAlexey Orishko /* push variables */ 752900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 753900d495aSAlexey Orishko /* set the pending count */ 754900d495aSAlexey Orishko if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 755c84ff1d6SAlexey Orishko ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 756900d495aSAlexey Orishko goto exit_no_skb; 757900d495aSAlexey Orishko 758900d495aSAlexey Orishko } else { 759900d495aSAlexey Orishko /* frame goes out */ 760900d495aSAlexey Orishko /* variables will be reset at next call */ 761900d495aSAlexey Orishko } 762900d495aSAlexey Orishko 763900d495aSAlexey Orishko /* 764900d495aSAlexey Orishko * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, 765900d495aSAlexey Orishko * we send buffers as it is. If we get more data, it would be more 766900d495aSAlexey Orishko * efficient for USB HS mobile device with DMA engine to receive a full 767900d495aSAlexey Orishko * size NTB, than canceling DMA transfer and receiving a short packet. 768900d495aSAlexey Orishko */ 769c78b7c58SBjørn Mork if (skb_out->len > CDC_NCM_MIN_TX_PKT) 770900d495aSAlexey Orishko /* final zero padding */ 771c78b7c58SBjørn Mork memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len); 772900d495aSAlexey Orishko 773c78b7c58SBjørn Mork /* do we need to prevent a ZLP? */ 774c78b7c58SBjørn Mork if (((skb_out->len % le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0) && 775c78b7c58SBjørn Mork (skb_out->len < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)) && skb_tailroom(skb_out)) 776c78b7c58SBjørn Mork *skb_put(skb_out, 1) = 0; /* force short packet */ 777900d495aSAlexey Orishko 778c78b7c58SBjørn Mork /* set final frame length */ 779c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 780c78b7c58SBjørn Mork nth16->wBlockLength = cpu_to_le16(skb_out->len); 781900d495aSAlexey Orishko 782900d495aSAlexey Orishko /* return skb */ 783900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 784c84ff1d6SAlexey Orishko ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; 785900d495aSAlexey Orishko return skb_out; 786900d495aSAlexey Orishko 787900d495aSAlexey Orishko exit_no_skb: 788c84ff1d6SAlexey Orishko /* Start timer, if there is a remaining skb */ 789c84ff1d6SAlexey Orishko if (ctx->tx_curr_skb != NULL) 790c84ff1d6SAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 791900d495aSAlexey Orishko return NULL; 792900d495aSAlexey Orishko } 793c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 794900d495aSAlexey Orishko 795900d495aSAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 796900d495aSAlexey Orishko { 797900d495aSAlexey Orishko /* start timer, if not already started */ 798c84ff1d6SAlexey Orishko if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 799c84ff1d6SAlexey Orishko hrtimer_start(&ctx->tx_timer, 800c84ff1d6SAlexey Orishko ktime_set(0, CDC_NCM_TIMER_INTERVAL), 801c84ff1d6SAlexey Orishko HRTIMER_MODE_REL); 802900d495aSAlexey Orishko } 803900d495aSAlexey Orishko 804c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 805900d495aSAlexey Orishko { 806c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = 807c84ff1d6SAlexey Orishko container_of(timer, struct cdc_ncm_ctx, tx_timer); 808900d495aSAlexey Orishko 809c84ff1d6SAlexey Orishko if (!atomic_read(&ctx->stop)) 810c84ff1d6SAlexey Orishko tasklet_schedule(&ctx->bh); 811c84ff1d6SAlexey Orishko return HRTIMER_NORESTART; 812c84ff1d6SAlexey Orishko } 813c84ff1d6SAlexey Orishko 814c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param) 815c84ff1d6SAlexey Orishko { 816c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; 817c84ff1d6SAlexey Orishko 818c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 819900d495aSAlexey Orishko if (ctx->tx_timer_pending != 0) { 820900d495aSAlexey Orishko ctx->tx_timer_pending--; 821900d495aSAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 822c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 823f742aa8aSAlexey Orishko } else if (ctx->netdev != NULL) { 824c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 825c84ff1d6SAlexey Orishko netif_tx_lock_bh(ctx->netdev); 826900d495aSAlexey Orishko usbnet_start_xmit(NULL, ctx->netdev); 827c84ff1d6SAlexey Orishko netif_tx_unlock_bh(ctx->netdev); 8287b1e0cbaSBjørn Mork } else { 8297b1e0cbaSBjørn Mork spin_unlock_bh(&ctx->mtx); 830900d495aSAlexey Orishko } 831f742aa8aSAlexey Orishko } 832900d495aSAlexey Orishko 833900d495aSAlexey Orishko static struct sk_buff * 834900d495aSAlexey Orishko cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 835900d495aSAlexey Orishko { 836900d495aSAlexey Orishko struct sk_buff *skb_out; 837900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 838900d495aSAlexey Orishko 839900d495aSAlexey Orishko /* 840900d495aSAlexey Orishko * The Ethernet API we are using does not support transmitting 841900d495aSAlexey Orishko * multiple Ethernet frames in a single call. This driver will 842900d495aSAlexey Orishko * accumulate multiple Ethernet frames and send out a larger 843900d495aSAlexey Orishko * USB frame when the USB buffer is full or when a single jiffies 844900d495aSAlexey Orishko * timeout happens. 845900d495aSAlexey Orishko */ 846900d495aSAlexey Orishko if (ctx == NULL) 847900d495aSAlexey Orishko goto error; 848900d495aSAlexey Orishko 849c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 850c78b7c58SBjørn Mork skb_out = cdc_ncm_fill_tx_frame(ctx, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 851c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 852900d495aSAlexey Orishko return skb_out; 853900d495aSAlexey Orishko 854900d495aSAlexey Orishko error: 855900d495aSAlexey Orishko if (skb != NULL) 856900d495aSAlexey Orishko dev_kfree_skb_any(skb); 857900d495aSAlexey Orishko 858900d495aSAlexey Orishko return NULL; 859900d495aSAlexey Orishko } 860900d495aSAlexey Orishko 861ff06ab13SBjørn Mork /* verify NTB header and return offset of first NDP, or negative error */ 862c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 863900d495aSAlexey Orishko { 864d5ddb4a5SAlexey Orishko struct usb_cdc_ncm_nth16 *nth16; 865ff06ab13SBjørn Mork int len; 866ff06ab13SBjørn Mork int ret = -EINVAL; 867900d495aSAlexey Orishko 868900d495aSAlexey Orishko if (ctx == NULL) 869900d495aSAlexey Orishko goto error; 870900d495aSAlexey Orishko 871d5ddb4a5SAlexey Orishko if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 872d5ddb4a5SAlexey Orishko sizeof(struct usb_cdc_ncm_ndp16))) { 873900d495aSAlexey Orishko pr_debug("frame too short\n"); 874900d495aSAlexey Orishko goto error; 875900d495aSAlexey Orishko } 876900d495aSAlexey Orishko 877d5ddb4a5SAlexey Orishko nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 878900d495aSAlexey Orishko 879d5ddb4a5SAlexey Orishko if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { 880900d495aSAlexey Orishko pr_debug("invalid NTH16 signature <%u>\n", 881d5ddb4a5SAlexey Orishko le32_to_cpu(nth16->dwSignature)); 882900d495aSAlexey Orishko goto error; 883900d495aSAlexey Orishko } 884900d495aSAlexey Orishko 885d5ddb4a5SAlexey Orishko len = le16_to_cpu(nth16->wBlockLength); 886d5ddb4a5SAlexey Orishko if (len > ctx->rx_max) { 887d5ddb4a5SAlexey Orishko pr_debug("unsupported NTB block length %u/%u\n", len, 888d5ddb4a5SAlexey Orishko ctx->rx_max); 889900d495aSAlexey Orishko goto error; 890900d495aSAlexey Orishko } 891900d495aSAlexey Orishko 892d5ddb4a5SAlexey Orishko if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 893d5ddb4a5SAlexey Orishko (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 894d5ddb4a5SAlexey Orishko !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 895d5ddb4a5SAlexey Orishko pr_debug("sequence number glitch prev=%d curr=%d\n", 896d5ddb4a5SAlexey Orishko ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 897d5ddb4a5SAlexey Orishko } 898d5ddb4a5SAlexey Orishko ctx->rx_seq = le16_to_cpu(nth16->wSequence); 899d5ddb4a5SAlexey Orishko 900ff06ab13SBjørn Mork ret = le16_to_cpu(nth16->wNdpIndex); 901ff06ab13SBjørn Mork error: 902ff06ab13SBjørn Mork return ret; 903ff06ab13SBjørn Mork } 904c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 905ff06ab13SBjørn Mork 906ff06ab13SBjørn Mork /* verify NDP header and return number of datagrams, or negative error */ 907c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 908ff06ab13SBjørn Mork { 909ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 910ff06ab13SBjørn Mork int ret = -EINVAL; 911ff06ab13SBjørn Mork 91275d67d35SBjørn Mork if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 91375d67d35SBjørn Mork pr_debug("invalid NDP offset <%u>\n", ndpoffset); 914900d495aSAlexey Orishko goto error; 915900d495aSAlexey Orishko } 91675d67d35SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 917900d495aSAlexey Orishko 918ff06ab13SBjørn Mork if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 919ff06ab13SBjørn Mork pr_debug("invalid DPT16 length <%u>\n", 920ff06ab13SBjørn Mork le32_to_cpu(ndp16->dwSignature)); 921ff06ab13SBjørn Mork goto error; 922ff06ab13SBjørn Mork } 923ff06ab13SBjørn Mork 924ff06ab13SBjørn Mork ret = ((le16_to_cpu(ndp16->wLength) - 925ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_ndp16)) / 926ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_dpe16)); 927ff06ab13SBjørn Mork ret--; /* we process NDP entries except for the last one */ 928ff06ab13SBjørn Mork 929ff06ab13SBjørn Mork if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > 930ff06ab13SBjørn Mork skb_in->len) { 931ff06ab13SBjørn Mork pr_debug("Invalid nframes = %d\n", ret); 932ff06ab13SBjørn Mork ret = -EINVAL; 933ff06ab13SBjørn Mork } 934ff06ab13SBjørn Mork 935ff06ab13SBjørn Mork error: 936ff06ab13SBjørn Mork return ret; 937ff06ab13SBjørn Mork } 938c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 939ff06ab13SBjørn Mork 940ff06ab13SBjørn Mork static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 941ff06ab13SBjørn Mork { 942ff06ab13SBjørn Mork struct sk_buff *skb; 943ff06ab13SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 944ff06ab13SBjørn Mork int len; 945ff06ab13SBjørn Mork int nframes; 946ff06ab13SBjørn Mork int x; 947ff06ab13SBjørn Mork int offset; 948ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 949ff06ab13SBjørn Mork struct usb_cdc_ncm_dpe16 *dpe16; 950ff06ab13SBjørn Mork int ndpoffset; 951ff06ab13SBjørn Mork int loopcount = 50; /* arbitrary max preventing infinite loop */ 952ff06ab13SBjørn Mork 953ff06ab13SBjørn Mork ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 954ff06ab13SBjørn Mork if (ndpoffset < 0) 955ff06ab13SBjørn Mork goto error; 956ff06ab13SBjørn Mork 957ff06ab13SBjørn Mork next_ndp: 958ff06ab13SBjørn Mork nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 959ff06ab13SBjørn Mork if (nframes < 0) 960ff06ab13SBjørn Mork goto error; 961ff06ab13SBjørn Mork 962ff06ab13SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 963ff06ab13SBjørn Mork 964d5ddb4a5SAlexey Orishko if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { 965900d495aSAlexey Orishko pr_debug("invalid DPT16 signature <%u>\n", 966d5ddb4a5SAlexey Orishko le32_to_cpu(ndp16->dwSignature)); 96775d67d35SBjørn Mork goto err_ndp; 968900d495aSAlexey Orishko } 969ff06ab13SBjørn Mork dpe16 = ndp16->dpe16; 970900d495aSAlexey Orishko 971d5ddb4a5SAlexey Orishko for (x = 0; x < nframes; x++, dpe16++) { 972d5ddb4a5SAlexey Orishko offset = le16_to_cpu(dpe16->wDatagramIndex); 973d5ddb4a5SAlexey Orishko len = le16_to_cpu(dpe16->wDatagramLength); 974900d495aSAlexey Orishko 975900d495aSAlexey Orishko /* 976900d495aSAlexey Orishko * CDC NCM ch. 3.7 977900d495aSAlexey Orishko * All entries after first NULL entry are to be ignored 978900d495aSAlexey Orishko */ 979d5ddb4a5SAlexey Orishko if ((offset == 0) || (len == 0)) { 980900d495aSAlexey Orishko if (!x) 98175d67d35SBjørn Mork goto err_ndp; /* empty NTB */ 982900d495aSAlexey Orishko break; 983900d495aSAlexey Orishko } 984900d495aSAlexey Orishko 985900d495aSAlexey Orishko /* sanity checking */ 986d5ddb4a5SAlexey Orishko if (((offset + len) > skb_in->len) || 987d5ddb4a5SAlexey Orishko (len > ctx->rx_max) || (len < ETH_HLEN)) { 988900d495aSAlexey Orishko pr_debug("invalid frame detected (ignored)" 989900d495aSAlexey Orishko "offset[%u]=%u, length=%u, skb=%p\n", 990d5ddb4a5SAlexey Orishko x, offset, len, skb_in); 991900d495aSAlexey Orishko if (!x) 99275d67d35SBjørn Mork goto err_ndp; 993900d495aSAlexey Orishko break; 994900d495aSAlexey Orishko 995900d495aSAlexey Orishko } else { 996900d495aSAlexey Orishko skb = skb_clone(skb_in, GFP_ATOMIC); 9979e56790aSJesper Juhl if (!skb) 9989e56790aSJesper Juhl goto error; 999d5ddb4a5SAlexey Orishko skb->len = len; 1000900d495aSAlexey Orishko skb->data = ((u8 *)skb_in->data) + offset; 1001d5ddb4a5SAlexey Orishko skb_set_tail_pointer(skb, len); 1002900d495aSAlexey Orishko usbnet_skb_return(dev, skb); 1003900d495aSAlexey Orishko } 1004900d495aSAlexey Orishko } 100575d67d35SBjørn Mork err_ndp: 100675d67d35SBjørn Mork /* are there more NDPs to process? */ 100775d67d35SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 100875d67d35SBjørn Mork if (ndpoffset && loopcount--) 100975d67d35SBjørn Mork goto next_ndp; 101075d67d35SBjørn Mork 1011900d495aSAlexey Orishko return 1; 1012900d495aSAlexey Orishko error: 1013900d495aSAlexey Orishko return 0; 1014900d495aSAlexey Orishko } 1015900d495aSAlexey Orishko 1016900d495aSAlexey Orishko static void 1017900d495aSAlexey Orishko cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, 101884e77a8bSAlexey Orishko struct usb_cdc_speed_change *data) 1019900d495aSAlexey Orishko { 102084e77a8bSAlexey Orishko uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 102184e77a8bSAlexey Orishko uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1022900d495aSAlexey Orishko 1023900d495aSAlexey Orishko /* 1024900d495aSAlexey Orishko * Currently the USB-NET API does not support reporting the actual 1025900d495aSAlexey Orishko * device speed. Do print it instead. 1026900d495aSAlexey Orishko */ 1027900d495aSAlexey Orishko if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { 1028900d495aSAlexey Orishko ctx->tx_speed = tx_speed; 1029900d495aSAlexey Orishko ctx->rx_speed = rx_speed; 1030900d495aSAlexey Orishko 1031900d495aSAlexey Orishko if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1032900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME 1033900d495aSAlexey Orishko ": %s: %u mbit/s downlink " 1034900d495aSAlexey Orishko "%u mbit/s uplink\n", 1035900d495aSAlexey Orishko ctx->netdev->name, 1036900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000000U), 1037900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000000U)); 1038900d495aSAlexey Orishko } else { 1039900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME 1040900d495aSAlexey Orishko ": %s: %u kbit/s downlink " 1041900d495aSAlexey Orishko "%u kbit/s uplink\n", 1042900d495aSAlexey Orishko ctx->netdev->name, 1043900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000U), 1044900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000U)); 1045900d495aSAlexey Orishko } 1046900d495aSAlexey Orishko } 1047900d495aSAlexey Orishko } 1048900d495aSAlexey Orishko 1049900d495aSAlexey Orishko static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1050900d495aSAlexey Orishko { 1051900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1052900d495aSAlexey Orishko struct usb_cdc_notification *event; 1053900d495aSAlexey Orishko 1054900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1055900d495aSAlexey Orishko 1056900d495aSAlexey Orishko if (urb->actual_length < sizeof(*event)) 1057900d495aSAlexey Orishko return; 1058900d495aSAlexey Orishko 1059900d495aSAlexey Orishko /* test for split data in 8-byte chunks */ 1060900d495aSAlexey Orishko if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1061900d495aSAlexey Orishko cdc_ncm_speed_change(ctx, 106284e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)urb->transfer_buffer); 1063900d495aSAlexey Orishko return; 1064900d495aSAlexey Orishko } 1065900d495aSAlexey Orishko 1066900d495aSAlexey Orishko event = urb->transfer_buffer; 1067900d495aSAlexey Orishko 1068900d495aSAlexey Orishko switch (event->bNotificationType) { 1069900d495aSAlexey Orishko case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1070900d495aSAlexey Orishko /* 1071900d495aSAlexey Orishko * According to the CDC NCM specification ch.7.1 1072900d495aSAlexey Orishko * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1073900d495aSAlexey Orishko * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1074900d495aSAlexey Orishko */ 10751a7c6cc6SBjørn Mork ctx->connected = le16_to_cpu(event->wValue); 1076900d495aSAlexey Orishko 1077900d495aSAlexey Orishko printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" 1078900d495aSAlexey Orishko " %sconnected\n", 1079900d495aSAlexey Orishko ctx->netdev->name, ctx->connected ? "" : "dis"); 1080900d495aSAlexey Orishko 1081900d495aSAlexey Orishko if (ctx->connected) 1082900d495aSAlexey Orishko netif_carrier_on(dev->net); 1083900d495aSAlexey Orishko else { 1084900d495aSAlexey Orishko netif_carrier_off(dev->net); 1085900d495aSAlexey Orishko ctx->tx_speed = ctx->rx_speed = 0; 1086900d495aSAlexey Orishko } 1087900d495aSAlexey Orishko break; 1088900d495aSAlexey Orishko 1089900d495aSAlexey Orishko case USB_CDC_NOTIFY_SPEED_CHANGE: 109084e77a8bSAlexey Orishko if (urb->actual_length < (sizeof(*event) + 109184e77a8bSAlexey Orishko sizeof(struct usb_cdc_speed_change))) 1092900d495aSAlexey Orishko set_bit(EVENT_STS_SPLIT, &dev->flags); 1093900d495aSAlexey Orishko else 1094900d495aSAlexey Orishko cdc_ncm_speed_change(ctx, 109584e77a8bSAlexey Orishko (struct usb_cdc_speed_change *) &event[1]); 1096900d495aSAlexey Orishko break; 1097900d495aSAlexey Orishko 1098900d495aSAlexey Orishko default: 1099900d495aSAlexey Orishko dev_err(&dev->udev->dev, "NCM: unexpected " 1100900d495aSAlexey Orishko "notification 0x%02x!\n", event->bNotificationType); 1101900d495aSAlexey Orishko break; 1102900d495aSAlexey Orishko } 1103900d495aSAlexey Orishko } 1104900d495aSAlexey Orishko 1105900d495aSAlexey Orishko static int cdc_ncm_check_connect(struct usbnet *dev) 1106900d495aSAlexey Orishko { 1107900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1108900d495aSAlexey Orishko 1109900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1110900d495aSAlexey Orishko if (ctx == NULL) 1111900d495aSAlexey Orishko return 1; /* disconnected */ 1112900d495aSAlexey Orishko 1113900d495aSAlexey Orishko return !ctx->connected; 1114900d495aSAlexey Orishko } 1115900d495aSAlexey Orishko 1116900d495aSAlexey Orishko static int 1117900d495aSAlexey Orishko cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) 1118900d495aSAlexey Orishko { 1119900d495aSAlexey Orishko return usbnet_probe(udev, prod); 1120900d495aSAlexey Orishko } 1121900d495aSAlexey Orishko 1122900d495aSAlexey Orishko static void cdc_ncm_disconnect(struct usb_interface *intf) 1123900d495aSAlexey Orishko { 1124900d495aSAlexey Orishko struct usbnet *dev = usb_get_intfdata(intf); 1125900d495aSAlexey Orishko 1126900d495aSAlexey Orishko if (dev == NULL) 1127900d495aSAlexey Orishko return; /* already disconnected */ 1128900d495aSAlexey Orishko 1129900d495aSAlexey Orishko usbnet_disconnect(intf); 1130900d495aSAlexey Orishko } 1131900d495aSAlexey Orishko 1132900d495aSAlexey Orishko static const struct driver_info cdc_ncm_info = { 1133900d495aSAlexey Orishko .description = "CDC NCM", 1134c261344dSArnd Bergmann .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1135900d495aSAlexey Orishko .bind = cdc_ncm_bind, 1136900d495aSAlexey Orishko .unbind = cdc_ncm_unbind, 1137900d495aSAlexey Orishko .check_connect = cdc_ncm_check_connect, 1138a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1139900d495aSAlexey Orishko .status = cdc_ncm_status, 1140900d495aSAlexey Orishko .rx_fixup = cdc_ncm_rx_fixup, 1141900d495aSAlexey Orishko .tx_fixup = cdc_ncm_tx_fixup, 1142900d495aSAlexey Orishko }; 1143900d495aSAlexey Orishko 1144f94898eaSDan Williams /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1145f94898eaSDan Williams static const struct driver_info wwan_info = { 1146f94898eaSDan Williams .description = "Mobile Broadband Network Device", 1147f94898eaSDan Williams .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1148f94898eaSDan Williams | FLAG_WWAN, 1149f94898eaSDan Williams .bind = cdc_ncm_bind, 1150f94898eaSDan Williams .unbind = cdc_ncm_unbind, 1151f94898eaSDan Williams .check_connect = cdc_ncm_check_connect, 1152a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1153f94898eaSDan Williams .status = cdc_ncm_status, 1154f94898eaSDan Williams .rx_fixup = cdc_ncm_rx_fixup, 1155f94898eaSDan Williams .tx_fixup = cdc_ncm_tx_fixup, 1156f94898eaSDan Williams }; 1157f94898eaSDan Williams 1158f94898eaSDan Williams static const struct usb_device_id cdc_devs[] = { 1159f94898eaSDan Williams /* Ericsson MBM devices like F5521gw */ 1160f94898eaSDan Williams { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1161f94898eaSDan Williams | USB_DEVICE_ID_MATCH_VENDOR, 1162f94898eaSDan Williams .idVendor = 0x0bdb, 1163f94898eaSDan Williams .bInterfaceClass = USB_CLASS_COMM, 1164f94898eaSDan Williams .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1165f94898eaSDan Williams .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1166f94898eaSDan Williams .driver_info = (unsigned long) &wwan_info, 1167f94898eaSDan Williams }, 1168f94898eaSDan Williams 1169f3a1ef9cSPeter Meiser /* Dell branded MBM devices like DW5550 */ 1170f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1171f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1172f3a1ef9cSPeter Meiser .idVendor = 0x413c, 1173f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1174f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1175f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1176f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1177f3a1ef9cSPeter Meiser }, 1178f3a1ef9cSPeter Meiser 1179f3a1ef9cSPeter Meiser /* Toshiba branded MBM devices */ 1180f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1181f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1182f3a1ef9cSPeter Meiser .idVendor = 0x0930, 1183f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1184f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1185f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1186f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1187f3a1ef9cSPeter Meiser }, 1188f3a1ef9cSPeter Meiser 1189bbc8d922SBjørn Mork /* Huawei NCM devices disguised as vendor specific */ 1190bbc8d922SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), 1191bbc8d922SBjørn Mork .driver_info = (unsigned long)&wwan_info, 1192bbc8d922SBjørn Mork }, 1193bbc8d922SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), 1194bbc8d922SBjørn Mork .driver_info = (unsigned long)&wwan_info, 1195bbc8d922SBjørn Mork }, 1196bbc8d922SBjørn Mork 1197f94898eaSDan Williams /* Generic CDC-NCM devices */ 1198f94898eaSDan Williams { USB_INTERFACE_INFO(USB_CLASS_COMM, 1199f94898eaSDan Williams USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1200f94898eaSDan Williams .driver_info = (unsigned long)&cdc_ncm_info, 1201f94898eaSDan Williams }, 1202f94898eaSDan Williams { 1203f94898eaSDan Williams }, 1204f94898eaSDan Williams }; 1205f94898eaSDan Williams MODULE_DEVICE_TABLE(usb, cdc_devs); 1206f94898eaSDan Williams 1207900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver = { 1208900d495aSAlexey Orishko .name = "cdc_ncm", 1209900d495aSAlexey Orishko .id_table = cdc_devs, 1210900d495aSAlexey Orishko .probe = cdc_ncm_probe, 1211900d495aSAlexey Orishko .disconnect = cdc_ncm_disconnect, 1212900d495aSAlexey Orishko .suspend = usbnet_suspend, 1213900d495aSAlexey Orishko .resume = usbnet_resume, 121485e3c65fSStefan Metzmacher .reset_resume = usbnet_resume, 1215900d495aSAlexey Orishko .supports_autosuspend = 1, 1216e1f12eb6SSarah Sharp .disable_hub_initiated_lpm = 1, 1217900d495aSAlexey Orishko }; 1218900d495aSAlexey Orishko 1219d632eb1bSGreg Kroah-Hartman module_usb_driver(cdc_ncm_driver); 1220900d495aSAlexey Orishko 1221900d495aSAlexey Orishko MODULE_AUTHOR("Hans Petter Selasky"); 1222900d495aSAlexey Orishko MODULE_DESCRIPTION("USB CDC NCM host driver"); 1223900d495aSAlexey Orishko MODULE_LICENSE("Dual BSD/GPL"); 1224