1 /*- 2 * Copyright (c) 1990, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from the Stanford/CMU enet packet filter, 6 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 7 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 8 * Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/bus.h> 40 #include <sys/fcntl.h> 41 #include <sys/malloc.h> 42 #include <sys/proc.h> 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <net/if.h> 46 #include <net/if_types.h> 47 #include <net/bpf.h> 48 49 #include <dev/usb/usb.h> 50 #include <dev/usb/usbdi.h> 51 #include <dev/usb/usb_busdma.h> 52 #include <dev/usb/usb_controller.h> 53 #include <dev/usb/usb_core.h> 54 #include <dev/usb/usb_process.h> 55 #include <dev/usb/usb_device.h> 56 #include <dev/usb/usb_bus.h> 57 #include <dev/usb/usb_pf.h> 58 #include <dev/usb/usb_transfer.h> 59 60 void 61 usbpf_attach(struct usb_bus *ubus) 62 { 63 struct ifnet *ifp; 64 65 ifp = ubus->ifp = if_alloc(IFT_USB); 66 if_initname(ifp, "usbus", device_get_unit(ubus->bdev)); 67 ifp->if_flags = IFF_CANTCONFIG; 68 if_attach(ifp); 69 if_up(ifp); 70 71 KASSERT(sizeof(struct usbpf_pkthdr) == USBPF_HDR_LEN, 72 ("wrong USB pf header length (%zd)", sizeof(struct usbpf_pkthdr))); 73 74 /* 75 * XXX According to the specification of DLT_USB, it indicates packets 76 * beginning with USB setup header. But not sure all packets would be. 77 */ 78 bpfattach(ifp, DLT_USB, USBPF_HDR_LEN); 79 80 if (bootverbose) 81 device_printf(ubus->parent, "usbpf attached\n"); 82 } 83 84 void 85 usbpf_detach(struct usb_bus *ubus) 86 { 87 struct ifnet *ifp = ubus->ifp; 88 89 if (ifp != NULL) { 90 bpfdetach(ifp); 91 if_down(ifp); 92 if_detach(ifp); 93 if_free(ifp); 94 } 95 ubus->ifp = NULL; 96 } 97 98 static uint32_t 99 usbpf_aggregate_xferflags(struct usb_xfer_flags *flags) 100 { 101 uint32_t val = 0; 102 103 if (flags->force_short_xfer == 1) 104 val |= USBPF_FLAG_FORCE_SHORT_XFER; 105 if (flags->short_xfer_ok == 1) 106 val |= USBPF_FLAG_SHORT_XFER_OK; 107 if (flags->short_frames_ok == 1) 108 val |= USBPF_FLAG_SHORT_FRAMES_OK; 109 if (flags->pipe_bof == 1) 110 val |= USBPF_FLAG_PIPE_BOF; 111 if (flags->proxy_buffer == 1) 112 val |= USBPF_FLAG_PROXY_BUFFER; 113 if (flags->ext_buffer == 1) 114 val |= USBPF_FLAG_EXT_BUFFER; 115 if (flags->manual_status == 1) 116 val |= USBPF_FLAG_MANUAL_STATUS; 117 if (flags->no_pipe_ok == 1) 118 val |= USBPF_FLAG_NO_PIPE_OK; 119 if (flags->stall_pipe == 1) 120 val |= USBPF_FLAG_STALL_PIPE; 121 return (val); 122 } 123 124 static uint32_t 125 usbpf_aggregate_status(struct usb_xfer_flags_int *flags) 126 { 127 uint32_t val = 0; 128 129 if (flags->open == 1) 130 val |= USBPF_STATUS_OPEN; 131 if (flags->transferring == 1) 132 val |= USBPF_STATUS_TRANSFERRING; 133 if (flags->did_dma_delay == 1) 134 val |= USBPF_STATUS_DID_DMA_DELAY; 135 if (flags->did_close == 1) 136 val |= USBPF_STATUS_DID_CLOSE; 137 if (flags->draining == 1) 138 val |= USBPF_STATUS_DRAINING; 139 if (flags->started == 1) 140 val |= USBPF_STATUS_STARTED; 141 if (flags->bandwidth_reclaimed == 1) 142 val |= USBPF_STATUS_BW_RECLAIMED; 143 if (flags->control_xfr == 1) 144 val |= USBPF_STATUS_CONTROL_XFR; 145 if (flags->control_hdr == 1) 146 val |= USBPF_STATUS_CONTROL_HDR; 147 if (flags->control_act == 1) 148 val |= USBPF_STATUS_CONTROL_ACT; 149 if (flags->control_stall == 1) 150 val |= USBPF_STATUS_CONTROL_STALL; 151 if (flags->short_frames_ok == 1) 152 val |= USBPF_STATUS_SHORT_FRAMES_OK; 153 if (flags->short_xfer_ok == 1) 154 val |= USBPF_STATUS_SHORT_XFER_OK; 155 #if USB_HAVE_BUSDMA 156 if (flags->bdma_enable == 1) 157 val |= USBPF_STATUS_BDMA_ENABLE; 158 if (flags->bdma_no_post_sync == 1) 159 val |= USBPF_STATUS_BDMA_NO_POST_SYNC; 160 if (flags->bdma_setup == 1) 161 val |= USBPF_STATUS_BDMA_SETUP; 162 #endif 163 if (flags->isochronous_xfr == 1) 164 val |= USBPF_STATUS_ISOCHRONOUS_XFR; 165 if (flags->curr_dma_set == 1) 166 val |= USBPF_STATUS_CURR_DMA_SET; 167 if (flags->can_cancel_immed == 1) 168 val |= USBPF_STATUS_CAN_CANCEL_IMMED; 169 if (flags->doing_callback == 1) 170 val |= USBPF_STATUS_DOING_CALLBACK; 171 172 return (val); 173 } 174 175 void 176 usbpf_xfertap(struct usb_xfer *xfer, int type) 177 { 178 struct usb_endpoint *ep = xfer->endpoint; 179 struct usb_page_search res; 180 struct usb_xfer_root *info = xfer->xroot; 181 struct usb_bus *bus = info->bus; 182 struct usbpf_pkthdr *up; 183 usb_frlength_t isoc_offset = 0; 184 int i; 185 char *buf, *ptr, *end; 186 187 if (!bpf_peers_present(bus->ifp->if_bpf)) 188 return; 189 190 /* 191 * XXX TODO 192 * Allocating the buffer here causes copy operations twice what's 193 * really inefficient. Copying usbpf_pkthdr and data is for USB packet 194 * read filter to pass a virtually linear buffer. 195 */ 196 buf = ptr = malloc(sizeof(struct usbpf_pkthdr) + (USB_PAGE_SIZE * 5), 197 M_TEMP, M_NOWAIT); 198 if (buf == NULL) { 199 printf("usbpf_xfertap: out of memory\n"); /* XXX */ 200 return; 201 } 202 end = buf + sizeof(struct usbpf_pkthdr) + (USB_PAGE_SIZE * 5); 203 204 bzero(ptr, sizeof(struct usbpf_pkthdr)); 205 up = (struct usbpf_pkthdr *)ptr; 206 up->up_busunit = htole32(device_get_unit(bus->bdev)); 207 up->up_type = type; 208 up->up_xfertype = ep->edesc->bmAttributes & UE_XFERTYPE; 209 up->up_address = xfer->address; 210 up->up_endpoint = xfer->endpointno; 211 up->up_flags = htole32(usbpf_aggregate_xferflags(&xfer->flags)); 212 up->up_status = htole32(usbpf_aggregate_status(&xfer->flags_int)); 213 switch (type) { 214 case USBPF_XFERTAP_SUBMIT: 215 up->up_length = htole32(xfer->sumlen); 216 up->up_frames = htole32(xfer->nframes); 217 break; 218 case USBPF_XFERTAP_DONE: 219 up->up_length = htole32(xfer->actlen); 220 up->up_frames = htole32(xfer->aframes); 221 break; 222 default: 223 panic("wrong usbpf type (%d)", type); 224 } 225 226 up->up_error = htole32(xfer->error); 227 up->up_interval = htole32(xfer->interval); 228 ptr += sizeof(struct usbpf_pkthdr); 229 230 for (i = 0; i < up->up_frames; i++) { 231 if (ptr + sizeof(uint32_t) >= end) 232 goto done; 233 *((uint32_t *)ptr) = htole32(xfer->frlengths[i]); 234 ptr += sizeof(uint32_t); 235 236 if (ptr + xfer->frlengths[i] >= end) 237 goto done; 238 if (xfer->flags_int.isochronous_xfr == 1) { 239 usbd_get_page(&xfer->frbuffers[0], isoc_offset, &res); 240 isoc_offset += xfer->frlengths[i]; 241 } else 242 usbd_get_page(&xfer->frbuffers[i], 0, &res); 243 bcopy(res.buffer, ptr, xfer->frlengths[i]); 244 ptr += xfer->frlengths[i]; 245 } 246 247 bpf_tap(bus->ifp->if_bpf, buf, ptr - buf); 248 done: 249 free(buf, M_TEMP); 250 } 251