| 1 | /* $NetBSD: if_xennet_xenbus.c,v 1.68 2016/06/10 13:27:13 ozaki-r Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2006 Manuel Bouyer. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Copyright (c) 2004 Christian Limpach. |
| 30 | * All rights reserved. |
| 31 | * |
| 32 | * Redistribution and use in source and binary forms, with or without |
| 33 | * modification, are permitted provided that the following conditions |
| 34 | * are met: |
| 35 | * 1. Redistributions of source code must retain the above copyright |
| 36 | * notice, this list of conditions and the following disclaimer. |
| 37 | * 2. Redistributions in binary form must reproduce the above copyright |
| 38 | * notice, this list of conditions and the following disclaimer in the |
| 39 | * documentation and/or other materials provided with the distribution. |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 42 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 43 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 44 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 45 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 47 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 48 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 49 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 50 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | */ |
| 52 | |
| 53 | /* |
| 54 | * This file contains the xennet frontend code required for the network |
| 55 | * communication between two Xen domains. |
| 56 | * It ressembles xbd, but is a little more complex as it must deal with two |
| 57 | * rings: |
| 58 | * - the TX ring, to transmit packets to backend (inside => outside) |
| 59 | * - the RX ring, to receive packets from backend (outside => inside) |
| 60 | * |
| 61 | * Principles are following. |
| 62 | * |
| 63 | * For TX: |
| 64 | * Purpose is to transmit packets to the outside. The start of day is in |
| 65 | * xennet_start() (default output routine of xennet) that schedules a softint, |
| 66 | * xennet_softstart(). xennet_softstart() generates the requests associated |
| 67 | * to the TX mbufs queued (see altq(9)). |
| 68 | * The backend's responses are processed by xennet_tx_complete(), called either |
| 69 | * from: |
| 70 | * - xennet_start() |
| 71 | * - xennet_handler(), during an asynchronous event notification from backend |
| 72 | * (similar to an IRQ). |
| 73 | * |
| 74 | * for RX: |
| 75 | * Purpose is to process the packets received from the outside. RX buffers |
| 76 | * are pre-allocated through xennet_alloc_rx_buffer(), during xennet autoconf |
| 77 | * attach. During pre-allocation, frontend pushes requests in the I/O ring, in |
| 78 | * preparation for incoming packets from backend. |
| 79 | * When RX packets need to be processed, backend takes the requests previously |
| 80 | * offered by frontend and pushes the associated responses inside the I/O ring. |
| 81 | * When done, it notifies frontend through an event notification, which will |
| 82 | * asynchronously call xennet_handler() in frontend. |
| 83 | * xennet_handler() processes the responses, generates the associated mbuf, and |
| 84 | * passes it to the MI layer for further processing. |
| 85 | */ |
| 86 | |
| 87 | #include <sys/cdefs.h> |
| 88 | __KERNEL_RCSID(0, "$NetBSD: if_xennet_xenbus.c,v 1.68 2016/06/10 13:27:13 ozaki-r Exp $" ); |
| 89 | |
| 90 | #include "opt_xen.h" |
| 91 | #include "opt_nfs_boot.h" |
| 92 | |
| 93 | #include <sys/param.h> |
| 94 | #include <sys/device.h> |
| 95 | #include <sys/conf.h> |
| 96 | #include <sys/kernel.h> |
| 97 | #include <sys/proc.h> |
| 98 | #include <sys/systm.h> |
| 99 | #include <sys/intr.h> |
| 100 | #include <sys/rndsource.h> |
| 101 | |
| 102 | #include <net/if.h> |
| 103 | #include <net/if_dl.h> |
| 104 | #include <net/if_ether.h> |
| 105 | #include <net/bpf.h> |
| 106 | #include <net/bpfdesc.h> |
| 107 | |
| 108 | #if defined(NFS_BOOT_BOOTSTATIC) |
| 109 | #include <sys/fstypes.h> |
| 110 | #include <sys/mount.h> |
| 111 | #include <sys/statvfs.h> |
| 112 | #include <netinet/in.h> |
| 113 | #include <nfs/rpcv2.h> |
| 114 | #include <nfs/nfsproto.h> |
| 115 | #include <nfs/nfs.h> |
| 116 | #include <nfs/nfsmount.h> |
| 117 | #include <nfs/nfsdiskless.h> |
| 118 | #include <xen/if_xennetvar.h> |
| 119 | #endif /* defined(NFS_BOOT_BOOTSTATIC) */ |
| 120 | |
| 121 | #include <xen/xennet_checksum.h> |
| 122 | |
| 123 | #include <uvm/uvm.h> |
| 124 | |
| 125 | #include <xen/hypervisor.h> |
| 126 | #include <xen/evtchn.h> |
| 127 | #include <xen/granttables.h> |
| 128 | #include <xen/xen-public/io/netif.h> |
| 129 | #include <xen/xenpmap.h> |
| 130 | |
| 131 | #include <xen/xenbus.h> |
| 132 | #include "locators.h" |
| 133 | |
| 134 | #undef XENNET_DEBUG_DUMP |
| 135 | #undef XENNET_DEBUG |
| 136 | #ifdef XENNET_DEBUG |
| 137 | #define XEDB_FOLLOW 0x01 |
| 138 | #define XEDB_INIT 0x02 |
| 139 | #define XEDB_EVENT 0x04 |
| 140 | #define XEDB_MBUF 0x08 |
| 141 | #define XEDB_MEM 0x10 |
| 142 | int xennet_debug = 0xff; |
| 143 | #define DPRINTF(x) if (xennet_debug) printf x; |
| 144 | #define DPRINTFN(n,x) if (xennet_debug & (n)) printf x; |
| 145 | #else |
| 146 | #define DPRINTF(x) |
| 147 | #define DPRINTFN(n,x) |
| 148 | #endif |
| 149 | |
| 150 | #define GRANT_INVALID_REF -1 /* entry is free */ |
| 151 | |
| 152 | #define NET_TX_RING_SIZE __CONST_RING_SIZE(netif_tx, PAGE_SIZE) |
| 153 | #define NET_RX_RING_SIZE __CONST_RING_SIZE(netif_rx, PAGE_SIZE) |
| 154 | |
| 155 | struct xennet_txreq { |
| 156 | SLIST_ENTRY(xennet_txreq) txreq_next; |
| 157 | uint16_t txreq_id; /* ID passed to backend */ |
| 158 | grant_ref_t txreq_gntref; /* grant ref of this request */ |
| 159 | struct mbuf *txreq_m; /* mbuf being transmitted */ |
| 160 | }; |
| 161 | |
| 162 | struct xennet_rxreq { |
| 163 | SLIST_ENTRY(xennet_rxreq) rxreq_next; |
| 164 | uint16_t rxreq_id; /* ID passed to backend */ |
| 165 | grant_ref_t rxreq_gntref; /* grant ref of this request */ |
| 166 | /* va/pa for this receive buf. ma will be provided by backend */ |
| 167 | paddr_t rxreq_pa; |
| 168 | vaddr_t rxreq_va; |
| 169 | struct xennet_xenbus_softc *rxreq_sc; /* pointer to our interface */ |
| 170 | }; |
| 171 | |
| 172 | struct xennet_xenbus_softc { |
| 173 | device_t sc_dev; |
| 174 | struct ethercom sc_ethercom; |
| 175 | uint8_t sc_enaddr[6]; |
| 176 | struct xenbus_device *sc_xbusd; |
| 177 | |
| 178 | netif_tx_front_ring_t sc_tx_ring; |
| 179 | netif_rx_front_ring_t sc_rx_ring; |
| 180 | |
| 181 | unsigned int sc_evtchn; |
| 182 | void *sc_softintr; |
| 183 | |
| 184 | grant_ref_t sc_tx_ring_gntref; |
| 185 | grant_ref_t sc_rx_ring_gntref; |
| 186 | |
| 187 | kmutex_t sc_tx_lock; /* protects free TX list, below */ |
| 188 | kmutex_t sc_rx_lock; /* protects free RX list, below */ |
| 189 | struct xennet_txreq sc_txreqs[NET_TX_RING_SIZE]; |
| 190 | struct xennet_rxreq sc_rxreqs[NET_RX_RING_SIZE]; |
| 191 | SLIST_HEAD(,xennet_txreq) sc_txreq_head; /* list of free TX requests */ |
| 192 | SLIST_HEAD(,xennet_rxreq) sc_rxreq_head; /* list of free RX requests */ |
| 193 | int sc_free_rxreql; /* number of free receive request struct */ |
| 194 | |
| 195 | int sc_backend_status; /* our status with backend */ |
| 196 | #define BEST_CLOSED 0 |
| 197 | #define BEST_DISCONNECTED 1 |
| 198 | #define BEST_CONNECTED 2 |
| 199 | #define BEST_SUSPENDED 3 |
| 200 | unsigned long sc_rx_feature; |
| 201 | #define FEATURE_RX_FLIP 0 |
| 202 | #define FEATURE_RX_COPY 1 |
| 203 | krndsource_t sc_rnd_source; |
| 204 | }; |
| 205 | #define SC_NLIVEREQ(sc) ((sc)->sc_rx_ring.req_prod_pvt - \ |
| 206 | (sc)->sc_rx_ring.sring->rsp_prod) |
| 207 | |
| 208 | /* too big to be on stack */ |
| 209 | static multicall_entry_t rx_mcl[NET_RX_RING_SIZE+1]; |
| 210 | static u_long xennet_pages[NET_RX_RING_SIZE]; |
| 211 | |
| 212 | static pool_cache_t if_xennetrxbuf_cache; |
| 213 | static int if_xennetrxbuf_cache_inited=0; |
| 214 | |
| 215 | static int xennet_xenbus_match(device_t, cfdata_t, void *); |
| 216 | static void xennet_xenbus_attach(device_t, device_t, void *); |
| 217 | static int xennet_xenbus_detach(device_t, int); |
| 218 | static void xennet_backend_changed(void *, XenbusState); |
| 219 | |
| 220 | static void xennet_alloc_rx_buffer(struct xennet_xenbus_softc *); |
| 221 | static void xennet_free_rx_buffer(struct xennet_xenbus_softc *); |
| 222 | static void xennet_tx_complete(struct xennet_xenbus_softc *); |
| 223 | static void xennet_rx_mbuf_free(struct mbuf *, void *, size_t, void *); |
| 224 | static void xennet_rx_free_req(struct xennet_rxreq *); |
| 225 | static int xennet_handler(void *); |
| 226 | static bool xennet_talk_to_backend(struct xennet_xenbus_softc *); |
| 227 | #ifdef XENNET_DEBUG_DUMP |
| 228 | static void xennet_hex_dump(const unsigned char *, size_t, const char *, int); |
| 229 | #endif |
| 230 | |
| 231 | static int xennet_init(struct ifnet *); |
| 232 | static void xennet_stop(struct ifnet *, int); |
| 233 | static void xennet_reset(struct xennet_xenbus_softc *); |
| 234 | static void xennet_softstart(void *); |
| 235 | static void xennet_start(struct ifnet *); |
| 236 | static int xennet_ioctl(struct ifnet *, u_long, void *); |
| 237 | static void xennet_watchdog(struct ifnet *); |
| 238 | |
| 239 | static bool xennet_xenbus_suspend(device_t dev, const pmf_qual_t *); |
| 240 | static bool xennet_xenbus_resume (device_t dev, const pmf_qual_t *); |
| 241 | |
| 242 | CFATTACH_DECL_NEW(xennet, sizeof(struct xennet_xenbus_softc), |
| 243 | xennet_xenbus_match, xennet_xenbus_attach, xennet_xenbus_detach, NULL); |
| 244 | |
| 245 | static int |
| 246 | xennet_xenbus_match(device_t parent, cfdata_t match, void *aux) |
| 247 | { |
| 248 | struct xenbusdev_attach_args *xa = aux; |
| 249 | |
| 250 | if (strcmp(xa->xa_type, "vif" ) != 0) |
| 251 | return 0; |
| 252 | |
| 253 | if (match->cf_loc[XENBUSCF_ID] != XENBUSCF_ID_DEFAULT && |
| 254 | match->cf_loc[XENBUSCF_ID] != xa->xa_id) |
| 255 | return 0; |
| 256 | |
| 257 | return 1; |
| 258 | } |
| 259 | |
| 260 | static void |
| 261 | xennet_xenbus_attach(device_t parent, device_t self, void *aux) |
| 262 | { |
| 263 | struct xennet_xenbus_softc *sc = device_private(self); |
| 264 | struct xenbusdev_attach_args *xa = aux; |
| 265 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 266 | int err; |
| 267 | netif_tx_sring_t *tx_ring; |
| 268 | netif_rx_sring_t *rx_ring; |
| 269 | RING_IDX i; |
| 270 | char *val, *e, *p; |
| 271 | int s; |
| 272 | extern int ifqmaxlen; /* XXX */ |
| 273 | #ifdef XENNET_DEBUG |
| 274 | char **dir; |
| 275 | int dir_n = 0; |
| 276 | char id_str[20]; |
| 277 | #endif |
| 278 | |
| 279 | aprint_normal(": Xen Virtual Network Interface\n" ); |
| 280 | sc->sc_dev = self; |
| 281 | |
| 282 | #ifdef XENNET_DEBUG |
| 283 | printf("path: %s\n" , xa->xa_xbusd->xbusd_path); |
| 284 | snprintf(id_str, sizeof(id_str), "%d" , xa->xa_id); |
| 285 | err = xenbus_directory(NULL, "device/vif" , id_str, &dir_n, &dir); |
| 286 | if (err) { |
| 287 | aprint_error_dev(self, "xenbus_directory err %d\n" , err); |
| 288 | } else { |
| 289 | printf("%s/\n" , xa->xa_xbusd->xbusd_path); |
| 290 | for (i = 0; i < dir_n; i++) { |
| 291 | printf("\t/%s" , dir[i]); |
| 292 | err = xenbus_read(NULL, xa->xa_xbusd->xbusd_path, |
| 293 | dir[i], NULL, &val); |
| 294 | if (err) { |
| 295 | aprint_error_dev(self, "xenbus_read err %d\n" , |
| 296 | err); |
| 297 | } else { |
| 298 | printf(" = %s\n" , val); |
| 299 | free(val, M_DEVBUF); |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | #endif /* XENNET_DEBUG */ |
| 304 | sc->sc_xbusd = xa->xa_xbusd; |
| 305 | sc->sc_xbusd->xbusd_otherend_changed = xennet_backend_changed; |
| 306 | |
| 307 | /* xenbus ensure 2 devices can't be probed at the same time */ |
| 308 | if (if_xennetrxbuf_cache_inited == 0) { |
| 309 | if_xennetrxbuf_cache = pool_cache_init(PAGE_SIZE, 0, 0, 0, |
| 310 | "xnfrx" , NULL, IPL_VM, NULL, NULL, NULL); |
| 311 | if_xennetrxbuf_cache_inited = 1; |
| 312 | } |
| 313 | |
| 314 | |
| 315 | /* initialize free RX and RX request lists */ |
| 316 | mutex_init(&sc->sc_tx_lock, MUTEX_DEFAULT, IPL_NET); |
| 317 | SLIST_INIT(&sc->sc_txreq_head); |
| 318 | for (i = 0; i < NET_TX_RING_SIZE; i++) { |
| 319 | sc->sc_txreqs[i].txreq_id = i; |
| 320 | SLIST_INSERT_HEAD(&sc->sc_txreq_head, &sc->sc_txreqs[i], |
| 321 | txreq_next); |
| 322 | } |
| 323 | mutex_init(&sc->sc_rx_lock, MUTEX_DEFAULT, IPL_NET); |
| 324 | SLIST_INIT(&sc->sc_rxreq_head); |
| 325 | s = splvm(); |
| 326 | for (i = 0; i < NET_RX_RING_SIZE; i++) { |
| 327 | struct xennet_rxreq *rxreq = &sc->sc_rxreqs[i]; |
| 328 | rxreq->rxreq_id = i; |
| 329 | rxreq->rxreq_sc = sc; |
| 330 | rxreq->rxreq_va = (vaddr_t)pool_cache_get_paddr( |
| 331 | if_xennetrxbuf_cache, PR_WAITOK, &rxreq->rxreq_pa); |
| 332 | if (rxreq->rxreq_va == 0) |
| 333 | break; |
| 334 | rxreq->rxreq_gntref = GRANT_INVALID_REF; |
| 335 | SLIST_INSERT_HEAD(&sc->sc_rxreq_head, rxreq, rxreq_next); |
| 336 | } |
| 337 | splx(s); |
| 338 | sc->sc_free_rxreql = i; |
| 339 | if (sc->sc_free_rxreql == 0) { |
| 340 | aprint_error_dev(self, "failed to allocate rx memory\n" ); |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | /* read mac address */ |
| 345 | err = xenbus_read(NULL, xa->xa_xbusd->xbusd_path, "mac" , NULL, &val); |
| 346 | if (err) { |
| 347 | aprint_error_dev(self, "can't read mac address, err %d\n" , err); |
| 348 | return; |
| 349 | } |
| 350 | for (i = 0, p = val; i < 6; i++) { |
| 351 | sc->sc_enaddr[i] = strtoul(p, &e, 16); |
| 352 | if ((e[0] == '\0' && i != 5) && e[0] != ':') { |
| 353 | aprint_error_dev(self, |
| 354 | "%s is not a valid mac address\n" , val); |
| 355 | free(val, M_DEVBUF); |
| 356 | return; |
| 357 | } |
| 358 | p = &e[1]; |
| 359 | } |
| 360 | free(val, M_DEVBUF); |
| 361 | aprint_normal_dev(self, "MAC address %s\n" , |
| 362 | ether_sprintf(sc->sc_enaddr)); |
| 363 | /* Initialize ifnet structure and attach interface */ |
| 364 | strlcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); |
| 365 | sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; |
| 366 | ifp->if_softc = sc; |
| 367 | ifp->if_start = xennet_start; |
| 368 | ifp->if_ioctl = xennet_ioctl; |
| 369 | ifp->if_watchdog = xennet_watchdog; |
| 370 | ifp->if_init = xennet_init; |
| 371 | ifp->if_stop = xennet_stop; |
| 372 | ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST; |
| 373 | ifp->if_timer = 0; |
| 374 | ifp->if_snd.ifq_maxlen = max(ifqmaxlen, NET_TX_RING_SIZE * 2); |
| 375 | ifp->if_capabilities = IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_UDPv4_Tx; |
| 376 | IFQ_SET_READY(&ifp->if_snd); |
| 377 | if_attach(ifp); |
| 378 | ether_ifattach(ifp, sc->sc_enaddr); |
| 379 | sc->sc_softintr = softint_establish(SOFTINT_NET, xennet_softstart, sc); |
| 380 | if (sc->sc_softintr == NULL) |
| 381 | panic("%s: can't establish soft interrupt" , |
| 382 | device_xname(self)); |
| 383 | |
| 384 | /* alloc shared rings */ |
| 385 | tx_ring = (void *)uvm_km_alloc(kernel_map, PAGE_SIZE, 0, |
| 386 | UVM_KMF_WIRED); |
| 387 | rx_ring = (void *)uvm_km_alloc(kernel_map, PAGE_SIZE, 0, |
| 388 | UVM_KMF_WIRED); |
| 389 | if (tx_ring == NULL || rx_ring == NULL) |
| 390 | panic("%s: can't alloc rings" , device_xname(self)); |
| 391 | |
| 392 | sc->sc_tx_ring.sring = tx_ring; |
| 393 | sc->sc_rx_ring.sring = rx_ring; |
| 394 | |
| 395 | /* resume shared structures and tell backend that we are ready */ |
| 396 | if (xennet_xenbus_resume(self, PMF_Q_NONE) == false) { |
| 397 | uvm_km_free(kernel_map, (vaddr_t)tx_ring, PAGE_SIZE, |
| 398 | UVM_KMF_WIRED); |
| 399 | uvm_km_free(kernel_map, (vaddr_t)rx_ring, PAGE_SIZE, |
| 400 | UVM_KMF_WIRED); |
| 401 | return; |
| 402 | } |
| 403 | |
| 404 | rnd_attach_source(&sc->sc_rnd_source, device_xname(sc->sc_dev), |
| 405 | RND_TYPE_NET, RND_FLAG_DEFAULT); |
| 406 | |
| 407 | if (!pmf_device_register(self, xennet_xenbus_suspend, |
| 408 | xennet_xenbus_resume)) |
| 409 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 410 | else |
| 411 | pmf_class_network_register(self, ifp); |
| 412 | } |
| 413 | |
| 414 | static int |
| 415 | xennet_xenbus_detach(device_t self, int flags) |
| 416 | { |
| 417 | struct xennet_xenbus_softc *sc = device_private(self); |
| 418 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 419 | int s0, s1; |
| 420 | RING_IDX i; |
| 421 | |
| 422 | DPRINTF(("%s: xennet_xenbus_detach\n" , device_xname(self))); |
| 423 | s0 = splnet(); |
| 424 | xennet_stop(ifp, 1); |
| 425 | event_remove_handler(sc->sc_evtchn, &xennet_handler, sc); |
| 426 | /* wait for pending TX to complete, and collect pending RX packets */ |
| 427 | xennet_handler(sc); |
| 428 | while (sc->sc_tx_ring.sring->rsp_prod != sc->sc_tx_ring.rsp_cons) { |
| 429 | tsleep(xennet_xenbus_detach, PRIBIO, "xnet_detach" , hz/2); |
| 430 | xennet_handler(sc); |
| 431 | } |
| 432 | xennet_free_rx_buffer(sc); |
| 433 | |
| 434 | s1 = splvm(); |
| 435 | for (i = 0; i < NET_RX_RING_SIZE; i++) { |
| 436 | struct xennet_rxreq *rxreq = &sc->sc_rxreqs[i]; |
| 437 | uvm_km_free(kernel_map, rxreq->rxreq_va, PAGE_SIZE, |
| 438 | UVM_KMF_WIRED); |
| 439 | } |
| 440 | splx(s1); |
| 441 | |
| 442 | ether_ifdetach(ifp); |
| 443 | if_detach(ifp); |
| 444 | |
| 445 | /* Unhook the entropy source. */ |
| 446 | rnd_detach_source(&sc->sc_rnd_source); |
| 447 | |
| 448 | while (xengnt_status(sc->sc_tx_ring_gntref)) { |
| 449 | tsleep(xennet_xenbus_detach, PRIBIO, "xnet_txref" , hz/2); |
| 450 | } |
| 451 | xengnt_revoke_access(sc->sc_tx_ring_gntref); |
| 452 | uvm_km_free(kernel_map, (vaddr_t)sc->sc_tx_ring.sring, PAGE_SIZE, |
| 453 | UVM_KMF_WIRED); |
| 454 | while (xengnt_status(sc->sc_rx_ring_gntref)) { |
| 455 | tsleep(xennet_xenbus_detach, PRIBIO, "xnet_rxref" , hz/2); |
| 456 | } |
| 457 | xengnt_revoke_access(sc->sc_rx_ring_gntref); |
| 458 | uvm_km_free(kernel_map, (vaddr_t)sc->sc_rx_ring.sring, PAGE_SIZE, |
| 459 | UVM_KMF_WIRED); |
| 460 | softint_disestablish(sc->sc_softintr); |
| 461 | splx(s0); |
| 462 | |
| 463 | pmf_device_deregister(self); |
| 464 | |
| 465 | DPRINTF(("%s: xennet_xenbus_detach done\n" , device_xname(self))); |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static bool |
| 470 | xennet_xenbus_resume(device_t dev, const pmf_qual_t *qual) |
| 471 | { |
| 472 | struct xennet_xenbus_softc *sc = device_private(dev); |
| 473 | int error; |
| 474 | netif_tx_sring_t *tx_ring; |
| 475 | netif_rx_sring_t *rx_ring; |
| 476 | paddr_t ma; |
| 477 | |
| 478 | /* invalidate the RX and TX rings */ |
| 479 | if (sc->sc_backend_status == BEST_SUSPENDED) { |
| 480 | /* |
| 481 | * Device was suspended, so ensure that access associated to |
| 482 | * the previous RX and TX rings are revoked. |
| 483 | */ |
| 484 | xengnt_revoke_access(sc->sc_tx_ring_gntref); |
| 485 | xengnt_revoke_access(sc->sc_rx_ring_gntref); |
| 486 | } |
| 487 | |
| 488 | sc->sc_tx_ring_gntref = GRANT_INVALID_REF; |
| 489 | sc->sc_rx_ring_gntref = GRANT_INVALID_REF; |
| 490 | |
| 491 | tx_ring = sc->sc_tx_ring.sring; |
| 492 | rx_ring = sc->sc_rx_ring.sring; |
| 493 | |
| 494 | /* Initialize rings */ |
| 495 | memset(tx_ring, 0, PAGE_SIZE); |
| 496 | SHARED_RING_INIT(tx_ring); |
| 497 | FRONT_RING_INIT(&sc->sc_tx_ring, tx_ring, PAGE_SIZE); |
| 498 | |
| 499 | memset(rx_ring, 0, PAGE_SIZE); |
| 500 | SHARED_RING_INIT(rx_ring); |
| 501 | FRONT_RING_INIT(&sc->sc_rx_ring, rx_ring, PAGE_SIZE); |
| 502 | |
| 503 | (void)pmap_extract_ma(pmap_kernel(), (vaddr_t)tx_ring, &ma); |
| 504 | error = xenbus_grant_ring(sc->sc_xbusd, ma, &sc->sc_tx_ring_gntref); |
| 505 | if (error) |
| 506 | goto abort_resume; |
| 507 | (void)pmap_extract_ma(pmap_kernel(), (vaddr_t)rx_ring, &ma); |
| 508 | error = xenbus_grant_ring(sc->sc_xbusd, ma, &sc->sc_rx_ring_gntref); |
| 509 | if (error) |
| 510 | goto abort_resume; |
| 511 | error = xenbus_alloc_evtchn(sc->sc_xbusd, &sc->sc_evtchn); |
| 512 | if (error) |
| 513 | goto abort_resume; |
| 514 | aprint_verbose_dev(dev, "using event channel %d\n" , |
| 515 | sc->sc_evtchn); |
| 516 | event_set_handler(sc->sc_evtchn, &xennet_handler, sc, |
| 517 | IPL_NET, device_xname(dev)); |
| 518 | return true; |
| 519 | |
| 520 | abort_resume: |
| 521 | xenbus_dev_fatal(sc->sc_xbusd, error, "resuming device" ); |
| 522 | return false; |
| 523 | } |
| 524 | |
| 525 | static bool |
| 526 | xennet_talk_to_backend(struct xennet_xenbus_softc *sc) |
| 527 | { |
| 528 | int error; |
| 529 | unsigned long rx_copy; |
| 530 | struct xenbus_transaction *xbt; |
| 531 | const char *errmsg; |
| 532 | |
| 533 | error = xenbus_read_ul(NULL, sc->sc_xbusd->xbusd_otherend, |
| 534 | "feature-rx-copy" , &rx_copy, 10); |
| 535 | if (error) |
| 536 | rx_copy = 0; /* default value if key is absent */ |
| 537 | |
| 538 | if (rx_copy == 1) { |
| 539 | aprint_normal_dev(sc->sc_dev, "using RX copy mode\n" ); |
| 540 | sc->sc_rx_feature = FEATURE_RX_COPY; |
| 541 | } else { |
| 542 | aprint_normal_dev(sc->sc_dev, "using RX flip mode\n" ); |
| 543 | sc->sc_rx_feature = FEATURE_RX_FLIP; |
| 544 | } |
| 545 | |
| 546 | again: |
| 547 | xbt = xenbus_transaction_start(); |
| 548 | if (xbt == NULL) |
| 549 | return false; |
| 550 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 551 | "vifname" , "%s" , device_xname(sc->sc_dev)); |
| 552 | if (error) { |
| 553 | errmsg = "vifname" ; |
| 554 | goto abort_transaction; |
| 555 | } |
| 556 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 557 | "tx-ring-ref" ,"%u" , sc->sc_tx_ring_gntref); |
| 558 | if (error) { |
| 559 | errmsg = "writing tx ring-ref" ; |
| 560 | goto abort_transaction; |
| 561 | } |
| 562 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 563 | "rx-ring-ref" ,"%u" , sc->sc_rx_ring_gntref); |
| 564 | if (error) { |
| 565 | errmsg = "writing rx ring-ref" ; |
| 566 | goto abort_transaction; |
| 567 | } |
| 568 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 569 | "request-rx-copy" , "%lu" , rx_copy); |
| 570 | if (error) { |
| 571 | errmsg = "writing request-rx-copy" ; |
| 572 | goto abort_transaction; |
| 573 | } |
| 574 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 575 | "feature-rx-notify" , "%u" , 1); |
| 576 | if (error) { |
| 577 | errmsg = "writing feature-rx-notify" ; |
| 578 | goto abort_transaction; |
| 579 | } |
| 580 | error = xenbus_printf(xbt, sc->sc_xbusd->xbusd_path, |
| 581 | "event-channel" , "%u" , sc->sc_evtchn); |
| 582 | if (error) { |
| 583 | errmsg = "writing event channel" ; |
| 584 | goto abort_transaction; |
| 585 | } |
| 586 | error = xenbus_transaction_end(xbt, 0); |
| 587 | if (error == EAGAIN) |
| 588 | goto again; |
| 589 | if (error) { |
| 590 | xenbus_dev_fatal(sc->sc_xbusd, error, "completing transaction" ); |
| 591 | return false; |
| 592 | } |
| 593 | mutex_enter(&sc->sc_rx_lock); |
| 594 | xennet_alloc_rx_buffer(sc); |
| 595 | mutex_exit(&sc->sc_rx_lock); |
| 596 | |
| 597 | if (sc->sc_backend_status == BEST_SUSPENDED) { |
| 598 | xenbus_device_resume(sc->sc_xbusd); |
| 599 | } |
| 600 | |
| 601 | sc->sc_backend_status = BEST_CONNECTED; |
| 602 | |
| 603 | return true; |
| 604 | |
| 605 | abort_transaction: |
| 606 | xenbus_transaction_end(xbt, 1); |
| 607 | xenbus_dev_fatal(sc->sc_xbusd, error, "%s" , errmsg); |
| 608 | return false; |
| 609 | } |
| 610 | |
| 611 | static bool |
| 612 | xennet_xenbus_suspend(device_t dev, const pmf_qual_t *qual) |
| 613 | { |
| 614 | int s; |
| 615 | struct xennet_xenbus_softc *sc = device_private(dev); |
| 616 | |
| 617 | /* |
| 618 | * xennet_stop() is called by pmf(9) before xennet_xenbus_suspend(), |
| 619 | * so we do not mask event channel here |
| 620 | */ |
| 621 | |
| 622 | s = splnet(); |
| 623 | /* process any outstanding TX responses, then collect RX packets */ |
| 624 | xennet_handler(sc); |
| 625 | while (sc->sc_tx_ring.sring->rsp_prod != sc->sc_tx_ring.rsp_cons) { |
| 626 | tsleep(xennet_xenbus_suspend, PRIBIO, "xnet_suspend" , hz/2); |
| 627 | xennet_handler(sc); |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | * dom0 may still use references to the grants we gave away |
| 632 | * earlier during RX buffers allocation. So we do not free RX buffers |
| 633 | * here, as dom0 does not expect the guest domain to suddenly revoke |
| 634 | * access to these grants. |
| 635 | */ |
| 636 | |
| 637 | sc->sc_backend_status = BEST_SUSPENDED; |
| 638 | event_remove_handler(sc->sc_evtchn, &xennet_handler, sc); |
| 639 | |
| 640 | splx(s); |
| 641 | |
| 642 | xenbus_device_suspend(sc->sc_xbusd); |
| 643 | aprint_verbose_dev(dev, "removed event channel %d\n" , sc->sc_evtchn); |
| 644 | |
| 645 | return true; |
| 646 | } |
| 647 | |
| 648 | static void xennet_backend_changed(void *arg, XenbusState new_state) |
| 649 | { |
| 650 | struct xennet_xenbus_softc *sc = device_private((device_t)arg); |
| 651 | DPRINTF(("%s: new backend state %d\n" , |
| 652 | device_xname(sc->sc_dev), new_state)); |
| 653 | |
| 654 | switch (new_state) { |
| 655 | case XenbusStateInitialising: |
| 656 | case XenbusStateInitialised: |
| 657 | case XenbusStateConnected: |
| 658 | break; |
| 659 | case XenbusStateClosing: |
| 660 | sc->sc_backend_status = BEST_CLOSED; |
| 661 | xenbus_switch_state(sc->sc_xbusd, NULL, XenbusStateClosed); |
| 662 | break; |
| 663 | case XenbusStateInitWait: |
| 664 | if (sc->sc_backend_status == BEST_CONNECTED) |
| 665 | break; |
| 666 | if (xennet_talk_to_backend(sc)) |
| 667 | xenbus_switch_state(sc->sc_xbusd, NULL, |
| 668 | XenbusStateConnected); |
| 669 | break; |
| 670 | case XenbusStateUnknown: |
| 671 | default: |
| 672 | panic("bad backend state %d" , new_state); |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * Allocate RX buffers and put the associated request structures |
| 678 | * in the ring. This allows the backend to use them to communicate with |
| 679 | * frontend when some data is destined to frontend |
| 680 | */ |
| 681 | |
| 682 | static void |
| 683 | xennet_alloc_rx_buffer(struct xennet_xenbus_softc *sc) |
| 684 | { |
| 685 | RING_IDX req_prod = sc->sc_rx_ring.req_prod_pvt; |
| 686 | RING_IDX i; |
| 687 | struct xennet_rxreq *req; |
| 688 | struct xen_memory_reservation reservation; |
| 689 | int s, otherend_id, notify; |
| 690 | |
| 691 | otherend_id = sc->sc_xbusd->xbusd_otherend_id; |
| 692 | |
| 693 | KASSERT(mutex_owned(&sc->sc_rx_lock)); |
| 694 | for (i = 0; sc->sc_free_rxreql != 0; i++) { |
| 695 | req = SLIST_FIRST(&sc->sc_rxreq_head); |
| 696 | KASSERT(req != NULL); |
| 697 | KASSERT(req == &sc->sc_rxreqs[req->rxreq_id]); |
| 698 | RING_GET_REQUEST(&sc->sc_rx_ring, req_prod + i)->id = |
| 699 | req->rxreq_id; |
| 700 | |
| 701 | switch (sc->sc_rx_feature) { |
| 702 | case FEATURE_RX_COPY: |
| 703 | if (xengnt_grant_access(otherend_id, |
| 704 | xpmap_ptom_masked(req->rxreq_pa), |
| 705 | 0, &req->rxreq_gntref) != 0) { |
| 706 | goto out_loop; |
| 707 | } |
| 708 | break; |
| 709 | case FEATURE_RX_FLIP: |
| 710 | if (xengnt_grant_transfer(otherend_id, |
| 711 | &req->rxreq_gntref) != 0) { |
| 712 | goto out_loop; |
| 713 | } |
| 714 | break; |
| 715 | default: |
| 716 | panic("%s: unsupported RX feature mode: %ld\n" , |
| 717 | __func__, sc->sc_rx_feature); |
| 718 | } |
| 719 | |
| 720 | RING_GET_REQUEST(&sc->sc_rx_ring, req_prod + i)->gref = |
| 721 | req->rxreq_gntref; |
| 722 | |
| 723 | SLIST_REMOVE_HEAD(&sc->sc_rxreq_head, rxreq_next); |
| 724 | sc->sc_free_rxreql--; |
| 725 | |
| 726 | if (sc->sc_rx_feature == FEATURE_RX_FLIP) { |
| 727 | /* unmap the page */ |
| 728 | MULTI_update_va_mapping(&rx_mcl[i], |
| 729 | req->rxreq_va, 0, 0); |
| 730 | /* |
| 731 | * Remove this page from pseudo phys map before |
| 732 | * passing back to Xen. |
| 733 | */ |
| 734 | xennet_pages[i] = |
| 735 | xpmap_ptom(req->rxreq_pa) >> PAGE_SHIFT; |
| 736 | xpmap_ptom_unmap(req->rxreq_pa); |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | out_loop: |
| 741 | if (i == 0) { |
| 742 | return; |
| 743 | } |
| 744 | |
| 745 | if (sc->sc_rx_feature == FEATURE_RX_FLIP) { |
| 746 | /* also make sure to flush all TLB entries */ |
| 747 | rx_mcl[i-1].args[MULTI_UVMFLAGS_INDEX] = |
| 748 | UVMF_TLB_FLUSH | UVMF_ALL; |
| 749 | /* |
| 750 | * We may have allocated buffers which have entries |
| 751 | * outstanding in the page update queue -- make sure we flush |
| 752 | * those first! |
| 753 | */ |
| 754 | s = splvm(); |
| 755 | xpq_flush_queue(); |
| 756 | splx(s); |
| 757 | /* now decrease reservation */ |
| 758 | set_xen_guest_handle(reservation.extent_start, xennet_pages); |
| 759 | reservation.nr_extents = i; |
| 760 | reservation.extent_order = 0; |
| 761 | reservation.address_bits = 0; |
| 762 | reservation.domid = DOMID_SELF; |
| 763 | rx_mcl[i].op = __HYPERVISOR_memory_op; |
| 764 | rx_mcl[i].args[0] = XENMEM_decrease_reservation; |
| 765 | rx_mcl[i].args[1] = (unsigned long)&reservation; |
| 766 | HYPERVISOR_multicall(rx_mcl, i+1); |
| 767 | if (__predict_false(rx_mcl[i].result != i)) { |
| 768 | panic("xennet_alloc_rx_buffer: " |
| 769 | "XENMEM_decrease_reservation" ); |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | sc->sc_rx_ring.req_prod_pvt = req_prod + i; |
| 774 | RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&sc->sc_rx_ring, notify); |
| 775 | if (notify) |
| 776 | hypervisor_notify_via_evtchn(sc->sc_evtchn); |
| 777 | return; |
| 778 | } |
| 779 | |
| 780 | /* |
| 781 | * Reclaim all RX buffers used by the I/O ring between frontend and backend |
| 782 | */ |
| 783 | static void |
| 784 | xennet_free_rx_buffer(struct xennet_xenbus_softc *sc) |
| 785 | { |
| 786 | paddr_t ma, pa; |
| 787 | vaddr_t va; |
| 788 | RING_IDX i; |
| 789 | mmu_update_t mmu[1]; |
| 790 | multicall_entry_t mcl[2]; |
| 791 | |
| 792 | mutex_enter(&sc->sc_rx_lock); |
| 793 | |
| 794 | DPRINTF(("%s: xennet_free_rx_buffer\n" , device_xname(sc->sc_dev))); |
| 795 | /* get back memory from RX ring */ |
| 796 | for (i = 0; i < NET_RX_RING_SIZE; i++) { |
| 797 | struct xennet_rxreq *rxreq = &sc->sc_rxreqs[i]; |
| 798 | |
| 799 | if (rxreq->rxreq_gntref != GRANT_INVALID_REF) { |
| 800 | /* |
| 801 | * this req is still granted. Get back the page or |
| 802 | * allocate a new one, and remap it. |
| 803 | */ |
| 804 | SLIST_INSERT_HEAD(&sc->sc_rxreq_head, rxreq, |
| 805 | rxreq_next); |
| 806 | sc->sc_free_rxreql++; |
| 807 | |
| 808 | switch (sc->sc_rx_feature) { |
| 809 | case FEATURE_RX_COPY: |
| 810 | xengnt_revoke_access(rxreq->rxreq_gntref); |
| 811 | rxreq->rxreq_gntref = GRANT_INVALID_REF; |
| 812 | break; |
| 813 | case FEATURE_RX_FLIP: |
| 814 | ma = xengnt_revoke_transfer( |
| 815 | rxreq->rxreq_gntref); |
| 816 | rxreq->rxreq_gntref = GRANT_INVALID_REF; |
| 817 | if (ma == 0) { |
| 818 | u_long pfn; |
| 819 | struct xen_memory_reservation xenres; |
| 820 | /* |
| 821 | * transfer not complete, we lost the page. |
| 822 | * Get one from hypervisor |
| 823 | */ |
| 824 | set_xen_guest_handle( |
| 825 | xenres.extent_start, &pfn); |
| 826 | xenres.nr_extents = 1; |
| 827 | xenres.extent_order = 0; |
| 828 | xenres.address_bits = 31; |
| 829 | xenres.domid = DOMID_SELF; |
| 830 | if (HYPERVISOR_memory_op( |
| 831 | XENMEM_increase_reservation, &xenres) < 0) { |
| 832 | panic("xennet_free_rx_buffer: " |
| 833 | "can't get memory back" ); |
| 834 | } |
| 835 | ma = pfn; |
| 836 | KASSERT(ma != 0); |
| 837 | } |
| 838 | pa = rxreq->rxreq_pa; |
| 839 | va = rxreq->rxreq_va; |
| 840 | /* remap the page */ |
| 841 | mmu[0].ptr = (ma << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE; |
| 842 | mmu[0].val = pa >> PAGE_SHIFT; |
| 843 | MULTI_update_va_mapping(&mcl[0], va, |
| 844 | (ma << PAGE_SHIFT) | PG_V | PG_KW, |
| 845 | UVMF_TLB_FLUSH|UVMF_ALL); |
| 846 | xpmap_ptom_map(pa, ptoa(ma)); |
| 847 | mcl[1].op = __HYPERVISOR_mmu_update; |
| 848 | mcl[1].args[0] = (unsigned long)mmu; |
| 849 | mcl[1].args[1] = 1; |
| 850 | mcl[1].args[2] = 0; |
| 851 | mcl[1].args[3] = DOMID_SELF; |
| 852 | HYPERVISOR_multicall(mcl, 2); |
| 853 | break; |
| 854 | default: |
| 855 | panic("%s: unsupported RX feature mode: %ld\n" , |
| 856 | __func__, sc->sc_rx_feature); |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | } |
| 861 | mutex_exit(&sc->sc_rx_lock); |
| 862 | DPRINTF(("%s: xennet_free_rx_buffer done\n" , device_xname(sc->sc_dev))); |
| 863 | } |
| 864 | |
| 865 | /* |
| 866 | * Clears a used RX request when its associated mbuf has been processed |
| 867 | */ |
| 868 | static void |
| 869 | xennet_rx_mbuf_free(struct mbuf *m, void *buf, size_t size, void *arg) |
| 870 | { |
| 871 | int s = splnet(); |
| 872 | KASSERT(buf == m->m_ext.ext_buf); |
| 873 | KASSERT(arg == NULL); |
| 874 | KASSERT(m != NULL); |
| 875 | vaddr_t va = (vaddr_t)(buf) & ~((vaddr_t)PAGE_MASK); |
| 876 | pool_cache_put_paddr(if_xennetrxbuf_cache, |
| 877 | (void *)va, m->m_ext.ext_paddr); |
| 878 | pool_cache_put(mb_cache, m); |
| 879 | splx(s); |
| 880 | }; |
| 881 | |
| 882 | static void |
| 883 | xennet_rx_free_req(struct xennet_rxreq *req) |
| 884 | { |
| 885 | struct xennet_xenbus_softc *sc = req->rxreq_sc; |
| 886 | |
| 887 | KASSERT(mutex_owned(&sc->sc_rx_lock)); |
| 888 | |
| 889 | /* puts back the RX request in the list of free RX requests */ |
| 890 | SLIST_INSERT_HEAD(&sc->sc_rxreq_head, req, rxreq_next); |
| 891 | sc->sc_free_rxreql++; |
| 892 | |
| 893 | /* |
| 894 | * ring needs more requests to be pushed in, allocate some |
| 895 | * RX buffers to catch-up with backend's consumption |
| 896 | */ |
| 897 | req->rxreq_gntref = GRANT_INVALID_REF; |
| 898 | |
| 899 | if (sc->sc_free_rxreql >= (NET_RX_RING_SIZE * 4 / 5) && |
| 900 | __predict_true(sc->sc_backend_status == BEST_CONNECTED)) { |
| 901 | xennet_alloc_rx_buffer(sc); |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * Process responses associated to the TX mbufs sent previously through |
| 907 | * xennet_softstart() |
| 908 | * Called at splnet. |
| 909 | */ |
| 910 | static void |
| 911 | xennet_tx_complete(struct xennet_xenbus_softc *sc) |
| 912 | { |
| 913 | struct xennet_txreq *req; |
| 914 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 915 | RING_IDX resp_prod, i; |
| 916 | |
| 917 | DPRINTFN(XEDB_EVENT, ("xennet_tx_complete prod %d cons %d\n" , |
| 918 | sc->sc_tx_ring.sring->rsp_prod, sc->sc_tx_ring.rsp_cons)); |
| 919 | |
| 920 | again: |
| 921 | resp_prod = sc->sc_tx_ring.sring->rsp_prod; |
| 922 | xen_rmb(); |
| 923 | mutex_enter(&sc->sc_tx_lock); |
| 924 | for (i = sc->sc_tx_ring.rsp_cons; i != resp_prod; i++) { |
| 925 | req = &sc->sc_txreqs[RING_GET_RESPONSE(&sc->sc_tx_ring, i)->id]; |
| 926 | KASSERT(req->txreq_id == |
| 927 | RING_GET_RESPONSE(&sc->sc_tx_ring, i)->id); |
| 928 | if (__predict_false(xengnt_status(req->txreq_gntref))) { |
| 929 | aprint_verbose_dev(sc->sc_dev, |
| 930 | "grant still used by backend\n" ); |
| 931 | sc->sc_tx_ring.rsp_cons = i; |
| 932 | goto end; |
| 933 | } |
| 934 | if (__predict_false( |
| 935 | RING_GET_RESPONSE(&sc->sc_tx_ring, i)->status != |
| 936 | NETIF_RSP_OKAY)) |
| 937 | ifp->if_oerrors++; |
| 938 | else |
| 939 | ifp->if_opackets++; |
| 940 | xengnt_revoke_access(req->txreq_gntref); |
| 941 | m_freem(req->txreq_m); |
| 942 | SLIST_INSERT_HEAD(&sc->sc_txreq_head, req, txreq_next); |
| 943 | } |
| 944 | mutex_exit(&sc->sc_tx_lock); |
| 945 | |
| 946 | sc->sc_tx_ring.rsp_cons = resp_prod; |
| 947 | /* set new event and check for race with rsp_cons update */ |
| 948 | sc->sc_tx_ring.sring->rsp_event = |
| 949 | resp_prod + ((sc->sc_tx_ring.sring->req_prod - resp_prod) >> 1) + 1; |
| 950 | ifp->if_timer = 0; |
| 951 | xen_wmb(); |
| 952 | if (resp_prod != sc->sc_tx_ring.sring->rsp_prod) |
| 953 | goto again; |
| 954 | end: |
| 955 | if (ifp->if_flags & IFF_OACTIVE) { |
| 956 | ifp->if_flags &= ~IFF_OACTIVE; |
| 957 | xennet_softstart(sc); |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | /* |
| 962 | * Xennet event handler. |
| 963 | * Get outstanding responses of TX packets, then collect all responses of |
| 964 | * pending RX packets |
| 965 | * Called at splnet. |
| 966 | */ |
| 967 | static int |
| 968 | xennet_handler(void *arg) |
| 969 | { |
| 970 | struct xennet_xenbus_softc *sc = arg; |
| 971 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 972 | RING_IDX resp_prod, i; |
| 973 | struct xennet_rxreq *req; |
| 974 | paddr_t ma, pa; |
| 975 | vaddr_t va; |
| 976 | mmu_update_t mmu[1]; |
| 977 | multicall_entry_t mcl[2]; |
| 978 | struct mbuf *m; |
| 979 | void *pktp; |
| 980 | int more_to_do; |
| 981 | |
| 982 | if (sc->sc_backend_status != BEST_CONNECTED) |
| 983 | return 1; |
| 984 | |
| 985 | xennet_tx_complete(sc); |
| 986 | |
| 987 | rnd_add_uint32(&sc->sc_rnd_source, sc->sc_tx_ring.req_prod_pvt); |
| 988 | |
| 989 | again: |
| 990 | DPRINTFN(XEDB_EVENT, ("xennet_handler prod %d cons %d\n" , |
| 991 | sc->sc_rx_ring.sring->rsp_prod, sc->sc_rx_ring.rsp_cons)); |
| 992 | |
| 993 | mutex_enter(&sc->sc_rx_lock); |
| 994 | resp_prod = sc->sc_rx_ring.sring->rsp_prod; |
| 995 | xen_rmb(); /* ensure we see replies up to resp_prod */ |
| 996 | |
| 997 | for (i = sc->sc_rx_ring.rsp_cons; i != resp_prod; i++) { |
| 998 | netif_rx_response_t *rx = RING_GET_RESPONSE(&sc->sc_rx_ring, i); |
| 999 | req = &sc->sc_rxreqs[rx->id]; |
| 1000 | KASSERT(req->rxreq_gntref != GRANT_INVALID_REF); |
| 1001 | KASSERT(req->rxreq_id == rx->id); |
| 1002 | |
| 1003 | ma = 0; |
| 1004 | switch (sc->sc_rx_feature) { |
| 1005 | case FEATURE_RX_COPY: |
| 1006 | xengnt_revoke_access(req->rxreq_gntref); |
| 1007 | break; |
| 1008 | case FEATURE_RX_FLIP: |
| 1009 | ma = xengnt_revoke_transfer(req->rxreq_gntref); |
| 1010 | if (ma == 0) { |
| 1011 | DPRINTFN(XEDB_EVENT, ("xennet_handler ma == 0\n" )); |
| 1012 | /* |
| 1013 | * the remote could't send us a packet. |
| 1014 | * we can't free this rxreq as no page will be mapped |
| 1015 | * here. Instead give it back immediatly to backend. |
| 1016 | */ |
| 1017 | ifp->if_ierrors++; |
| 1018 | RING_GET_REQUEST(&sc->sc_rx_ring, |
| 1019 | sc->sc_rx_ring.req_prod_pvt)->id = req->rxreq_id; |
| 1020 | RING_GET_REQUEST(&sc->sc_rx_ring, |
| 1021 | sc->sc_rx_ring.req_prod_pvt)->gref = |
| 1022 | req->rxreq_gntref; |
| 1023 | sc->sc_rx_ring.req_prod_pvt++; |
| 1024 | RING_PUSH_REQUESTS(&sc->sc_rx_ring); |
| 1025 | continue; |
| 1026 | } |
| 1027 | break; |
| 1028 | default: |
| 1029 | panic("%s: unsupported RX feature mode: %ld\n" , |
| 1030 | __func__, sc->sc_rx_feature); |
| 1031 | } |
| 1032 | |
| 1033 | pa = req->rxreq_pa; |
| 1034 | va = req->rxreq_va; |
| 1035 | |
| 1036 | if (sc->sc_rx_feature == FEATURE_RX_FLIP) { |
| 1037 | /* remap the page */ |
| 1038 | mmu[0].ptr = (ma << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE; |
| 1039 | mmu[0].val = pa >> PAGE_SHIFT; |
| 1040 | MULTI_update_va_mapping(&mcl[0], va, |
| 1041 | (ma << PAGE_SHIFT) | PG_V | PG_KW, UVMF_TLB_FLUSH|UVMF_ALL); |
| 1042 | xpmap_ptom_map(pa, ptoa(ma)); |
| 1043 | mcl[1].op = __HYPERVISOR_mmu_update; |
| 1044 | mcl[1].args[0] = (unsigned long)mmu; |
| 1045 | mcl[1].args[1] = 1; |
| 1046 | mcl[1].args[2] = 0; |
| 1047 | mcl[1].args[3] = DOMID_SELF; |
| 1048 | HYPERVISOR_multicall(mcl, 2); |
| 1049 | } |
| 1050 | |
| 1051 | pktp = (void *)(va + rx->offset); |
| 1052 | #ifdef XENNET_DEBUG_DUMP |
| 1053 | xennet_hex_dump(pktp, rx->status, "r" , rx->id); |
| 1054 | #endif |
| 1055 | if ((ifp->if_flags & IFF_PROMISC) == 0) { |
| 1056 | struct ether_header *eh = pktp; |
| 1057 | if (ETHER_IS_MULTICAST(eh->ether_dhost) == 0 && |
| 1058 | memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, |
| 1059 | ETHER_ADDR_LEN) != 0) { |
| 1060 | DPRINTFN(XEDB_EVENT, |
| 1061 | ("xennet_handler bad dest\n" )); |
| 1062 | /* packet not for us */ |
| 1063 | xennet_rx_free_req(req); |
| 1064 | continue; |
| 1065 | } |
| 1066 | } |
| 1067 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 1068 | if (__predict_false(m == NULL)) { |
| 1069 | printf("%s: rx no mbuf\n" , ifp->if_xname); |
| 1070 | ifp->if_ierrors++; |
| 1071 | xennet_rx_free_req(req); |
| 1072 | continue; |
| 1073 | } |
| 1074 | MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner); |
| 1075 | |
| 1076 | m_set_rcvif(m, ifp); |
| 1077 | req->rxreq_va = (vaddr_t)pool_cache_get_paddr( |
| 1078 | if_xennetrxbuf_cache, PR_NOWAIT, &req->rxreq_pa); |
| 1079 | if (__predict_false(req->rxreq_va == 0)) { |
| 1080 | printf("%s: rx no buf\n" , ifp->if_xname); |
| 1081 | ifp->if_ierrors++; |
| 1082 | req->rxreq_va = va; |
| 1083 | req->rxreq_pa = pa; |
| 1084 | xennet_rx_free_req(req); |
| 1085 | m_freem(m); |
| 1086 | continue; |
| 1087 | } |
| 1088 | m->m_len = m->m_pkthdr.len = rx->status; |
| 1089 | MEXTADD(m, pktp, rx->status, |
| 1090 | M_DEVBUF, xennet_rx_mbuf_free, NULL); |
| 1091 | m->m_flags |= M_EXT_RW; /* we own the buffer */ |
| 1092 | m->m_ext.ext_paddr = pa; |
| 1093 | if ((rx->flags & NETRXF_csum_blank) != 0) { |
| 1094 | xennet_checksum_fill(&m); |
| 1095 | if (m == NULL) { |
| 1096 | ifp->if_ierrors++; |
| 1097 | continue; |
| 1098 | } |
| 1099 | } |
| 1100 | /* free req may overwrite *rx, better doing it late */ |
| 1101 | xennet_rx_free_req(req); |
| 1102 | /* |
| 1103 | * Pass packet to bpf if there is a listener. |
| 1104 | */ |
| 1105 | bpf_mtap(ifp, m); |
| 1106 | |
| 1107 | ifp->if_ipackets++; |
| 1108 | |
| 1109 | /* Pass the packet up. */ |
| 1110 | if_percpuq_enqueue(ifp->if_percpuq, m); |
| 1111 | } |
| 1112 | xen_rmb(); |
| 1113 | sc->sc_rx_ring.rsp_cons = i; |
| 1114 | RING_FINAL_CHECK_FOR_RESPONSES(&sc->sc_rx_ring, more_to_do); |
| 1115 | mutex_exit(&sc->sc_rx_lock); |
| 1116 | |
| 1117 | if (more_to_do) |
| 1118 | goto again; |
| 1119 | |
| 1120 | return 1; |
| 1121 | } |
| 1122 | |
| 1123 | /* |
| 1124 | * The output routine of a xennet interface |
| 1125 | * Called at splnet. |
| 1126 | */ |
| 1127 | void |
| 1128 | xennet_start(struct ifnet *ifp) |
| 1129 | { |
| 1130 | struct xennet_xenbus_softc *sc = ifp->if_softc; |
| 1131 | |
| 1132 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_start()\n" , device_xname(sc->sc_dev))); |
| 1133 | |
| 1134 | rnd_add_uint32(&sc->sc_rnd_source, sc->sc_tx_ring.req_prod_pvt); |
| 1135 | |
| 1136 | xennet_tx_complete(sc); |
| 1137 | |
| 1138 | if (__predict_false( |
| 1139 | (ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)) |
| 1140 | return; |
| 1141 | |
| 1142 | /* |
| 1143 | * The Xen communication channel is much more efficient if we can |
| 1144 | * schedule batch of packets for domain0. To achieve this, we |
| 1145 | * schedule a soft interrupt, and just return. This way, the network |
| 1146 | * stack will enqueue all pending mbufs in the interface's send queue |
| 1147 | * before it is processed by xennet_softstart(). |
| 1148 | */ |
| 1149 | softint_schedule(sc->sc_softintr); |
| 1150 | return; |
| 1151 | } |
| 1152 | |
| 1153 | /* |
| 1154 | * Prepares mbufs for TX, and notify backend when finished |
| 1155 | * Called at splsoftnet |
| 1156 | */ |
| 1157 | void |
| 1158 | xennet_softstart(void *arg) |
| 1159 | { |
| 1160 | struct xennet_xenbus_softc *sc = arg; |
| 1161 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 1162 | struct mbuf *m, *new_m; |
| 1163 | netif_tx_request_t *txreq; |
| 1164 | RING_IDX req_prod; |
| 1165 | paddr_t pa, pa2; |
| 1166 | struct xennet_txreq *req; |
| 1167 | int notify; |
| 1168 | int do_notify = 0; |
| 1169 | |
| 1170 | mutex_enter(&sc->sc_tx_lock); |
| 1171 | if (__predict_false( |
| 1172 | (ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)) { |
| 1173 | mutex_exit(&sc->sc_tx_lock); |
| 1174 | return; |
| 1175 | } |
| 1176 | |
| 1177 | req_prod = sc->sc_tx_ring.req_prod_pvt; |
| 1178 | while (/*CONSTCOND*/1) { |
| 1179 | uint16_t txflags; |
| 1180 | |
| 1181 | req = SLIST_FIRST(&sc->sc_txreq_head); |
| 1182 | if (__predict_false(req == NULL)) { |
| 1183 | ifp->if_flags |= IFF_OACTIVE; |
| 1184 | break; |
| 1185 | } |
| 1186 | IFQ_POLL(&ifp->if_snd, m); |
| 1187 | if (m == NULL) |
| 1188 | break; |
| 1189 | |
| 1190 | switch (m->m_flags & (M_EXT|M_EXT_CLUSTER)) { |
| 1191 | case M_EXT|M_EXT_CLUSTER: |
| 1192 | KASSERT(m->m_ext.ext_paddr != M_PADDR_INVALID); |
| 1193 | pa = m->m_ext.ext_paddr + |
| 1194 | (m->m_data - m->m_ext.ext_buf); |
| 1195 | break; |
| 1196 | case 0: |
| 1197 | KASSERT(m->m_paddr != M_PADDR_INVALID); |
| 1198 | pa = m->m_paddr + M_BUFOFFSET(m) + |
| 1199 | (m->m_data - M_BUFADDR(m)); |
| 1200 | break; |
| 1201 | default: |
| 1202 | if (__predict_false( |
| 1203 | !pmap_extract(pmap_kernel(), (vaddr_t)m->m_data, |
| 1204 | &pa))) { |
| 1205 | panic("xennet_start: no pa" ); |
| 1206 | } |
| 1207 | break; |
| 1208 | } |
| 1209 | |
| 1210 | if ((m->m_pkthdr.csum_flags & |
| 1211 | (M_CSUM_TCPv4 | M_CSUM_UDPv4)) != 0) { |
| 1212 | txflags = NETTXF_csum_blank; |
| 1213 | } else { |
| 1214 | txflags = 0; |
| 1215 | } |
| 1216 | |
| 1217 | if (m->m_pkthdr.len != m->m_len || |
| 1218 | (pa ^ (pa + m->m_pkthdr.len - 1)) & PG_FRAME) { |
| 1219 | |
| 1220 | MGETHDR(new_m, M_DONTWAIT, MT_DATA); |
| 1221 | if (__predict_false(new_m == NULL)) { |
| 1222 | printf("%s: cannot allocate new mbuf\n" , |
| 1223 | device_xname(sc->sc_dev)); |
| 1224 | break; |
| 1225 | } |
| 1226 | if (m->m_pkthdr.len > MHLEN) { |
| 1227 | MCLGET(new_m, M_DONTWAIT); |
| 1228 | if (__predict_false( |
| 1229 | (new_m->m_flags & M_EXT) == 0)) { |
| 1230 | DPRINTF(("%s: no mbuf cluster\n" , |
| 1231 | device_xname(sc->sc_dev))); |
| 1232 | m_freem(new_m); |
| 1233 | break; |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | m_copydata(m, 0, m->m_pkthdr.len, mtod(new_m, void *)); |
| 1238 | new_m->m_len = new_m->m_pkthdr.len = m->m_pkthdr.len; |
| 1239 | |
| 1240 | if ((new_m->m_flags & M_EXT) != 0) { |
| 1241 | pa = new_m->m_ext.ext_paddr; |
| 1242 | KASSERT(new_m->m_data == new_m->m_ext.ext_buf); |
| 1243 | KASSERT(pa != M_PADDR_INVALID); |
| 1244 | } else { |
| 1245 | pa = new_m->m_paddr; |
| 1246 | KASSERT(pa != M_PADDR_INVALID); |
| 1247 | KASSERT(new_m->m_data == M_BUFADDR(new_m)); |
| 1248 | pa += M_BUFOFFSET(new_m); |
| 1249 | } |
| 1250 | if (__predict_false(xengnt_grant_access( |
| 1251 | sc->sc_xbusd->xbusd_otherend_id, |
| 1252 | xpmap_ptom_masked(pa), |
| 1253 | GNTMAP_readonly, &req->txreq_gntref) != 0)) { |
| 1254 | m_freem(new_m); |
| 1255 | ifp->if_flags |= IFF_OACTIVE; |
| 1256 | break; |
| 1257 | } |
| 1258 | /* we will be able to send new_m */ |
| 1259 | IFQ_DEQUEUE(&ifp->if_snd, m); |
| 1260 | m_freem(m); |
| 1261 | m = new_m; |
| 1262 | } else { |
| 1263 | if (__predict_false(xengnt_grant_access( |
| 1264 | sc->sc_xbusd->xbusd_otherend_id, |
| 1265 | xpmap_ptom_masked(pa), |
| 1266 | GNTMAP_readonly, &req->txreq_gntref) != 0)) { |
| 1267 | ifp->if_flags |= IFF_OACTIVE; |
| 1268 | break; |
| 1269 | } |
| 1270 | /* we will be able to send m */ |
| 1271 | IFQ_DEQUEUE(&ifp->if_snd, m); |
| 1272 | } |
| 1273 | MCLAIM(m, &sc->sc_ethercom.ec_tx_mowner); |
| 1274 | |
| 1275 | KASSERT(((pa ^ (pa + m->m_pkthdr.len - 1)) & PG_FRAME) == 0); |
| 1276 | |
| 1277 | SLIST_REMOVE_HEAD(&sc->sc_txreq_head, txreq_next); |
| 1278 | req->txreq_m = m; |
| 1279 | |
| 1280 | DPRINTFN(XEDB_MBUF, ("xennet_start id %d, " |
| 1281 | "mbuf %p, buf %p/%p/%p, size %d\n" , |
| 1282 | req->txreq_id, m, mtod(m, void *), (void *)pa, |
| 1283 | (void *)xpmap_ptom_masked(pa), m->m_pkthdr.len)); |
| 1284 | pmap_extract_ma(pmap_kernel(), mtod(m, vaddr_t), &pa2); |
| 1285 | DPRINTFN(XEDB_MBUF, ("xennet_start pa %p ma %p/%p\n" , |
| 1286 | (void *)pa, (void *)xpmap_ptom_masked(pa), (void *)pa2)); |
| 1287 | #ifdef XENNET_DEBUG_DUMP |
| 1288 | xennet_hex_dump(mtod(m, u_char *), m->m_pkthdr.len, "s" , |
| 1289 | req->txreq_id); |
| 1290 | #endif |
| 1291 | |
| 1292 | txreq = RING_GET_REQUEST(&sc->sc_tx_ring, req_prod); |
| 1293 | txreq->id = req->txreq_id; |
| 1294 | txreq->gref = req->txreq_gntref; |
| 1295 | txreq->offset = pa & ~PG_FRAME; |
| 1296 | txreq->size = m->m_pkthdr.len; |
| 1297 | txreq->flags = txflags; |
| 1298 | |
| 1299 | req_prod++; |
| 1300 | sc->sc_tx_ring.req_prod_pvt = req_prod; |
| 1301 | RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&sc->sc_tx_ring, notify); |
| 1302 | if (notify) |
| 1303 | do_notify = 1; |
| 1304 | |
| 1305 | #ifdef XENNET_DEBUG |
| 1306 | DPRINTFN(XEDB_MEM, ("packet addr %p/%p, physical %p/%p, " |
| 1307 | "m_paddr %p, len %d/%d\n" , M_BUFADDR(m), mtod(m, void *), |
| 1308 | (void *)*kvtopte(mtod(m, vaddr_t)), |
| 1309 | (void *)xpmap_mtop(*kvtopte(mtod(m, vaddr_t))), |
| 1310 | (void *)m->m_paddr, m->m_pkthdr.len, m->m_len)); |
| 1311 | DPRINTFN(XEDB_MEM, ("id %d gref %d offset %d size %d flags %d" |
| 1312 | " prod %d\n" , |
| 1313 | txreq->id, txreq->gref, txreq->offset, txreq->size, |
| 1314 | txreq->flags, req_prod)); |
| 1315 | #endif |
| 1316 | |
| 1317 | /* |
| 1318 | * Pass packet to bpf if there is a listener. |
| 1319 | */ |
| 1320 | bpf_mtap(ifp, m); |
| 1321 | } |
| 1322 | |
| 1323 | if (do_notify) { |
| 1324 | hypervisor_notify_via_evtchn(sc->sc_evtchn); |
| 1325 | ifp->if_timer = 5; |
| 1326 | } |
| 1327 | |
| 1328 | mutex_exit(&sc->sc_tx_lock); |
| 1329 | |
| 1330 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_start() done\n" , |
| 1331 | device_xname(sc->sc_dev))); |
| 1332 | } |
| 1333 | |
| 1334 | int |
| 1335 | xennet_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
| 1336 | { |
| 1337 | #ifdef XENNET_DEBUG |
| 1338 | struct xennet_xenbus_softc *sc = ifp->if_softc; |
| 1339 | #endif |
| 1340 | int s, error = 0; |
| 1341 | |
| 1342 | s = splnet(); |
| 1343 | |
| 1344 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_ioctl()\n" , |
| 1345 | device_xname(sc->sc_dev))); |
| 1346 | error = ether_ioctl(ifp, cmd, data); |
| 1347 | if (error == ENETRESET) |
| 1348 | error = 0; |
| 1349 | splx(s); |
| 1350 | |
| 1351 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_ioctl() returning %d\n" , |
| 1352 | device_xname(sc->sc_dev), error)); |
| 1353 | |
| 1354 | return error; |
| 1355 | } |
| 1356 | |
| 1357 | void |
| 1358 | xennet_watchdog(struct ifnet *ifp) |
| 1359 | { |
| 1360 | aprint_verbose_ifnet(ifp, "xennet_watchdog\n" ); |
| 1361 | } |
| 1362 | |
| 1363 | int |
| 1364 | xennet_init(struct ifnet *ifp) |
| 1365 | { |
| 1366 | struct xennet_xenbus_softc *sc = ifp->if_softc; |
| 1367 | mutex_enter(&sc->sc_rx_lock); |
| 1368 | |
| 1369 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_init()\n" , |
| 1370 | device_xname(sc->sc_dev))); |
| 1371 | |
| 1372 | if ((ifp->if_flags & IFF_RUNNING) == 0) { |
| 1373 | sc->sc_rx_ring.sring->rsp_event = |
| 1374 | sc->sc_rx_ring.rsp_cons + 1; |
| 1375 | hypervisor_enable_event(sc->sc_evtchn); |
| 1376 | hypervisor_notify_via_evtchn(sc->sc_evtchn); |
| 1377 | xennet_reset(sc); |
| 1378 | } |
| 1379 | ifp->if_flags |= IFF_RUNNING; |
| 1380 | ifp->if_flags &= ~IFF_OACTIVE; |
| 1381 | ifp->if_timer = 0; |
| 1382 | mutex_exit(&sc->sc_rx_lock); |
| 1383 | return 0; |
| 1384 | } |
| 1385 | |
| 1386 | void |
| 1387 | xennet_stop(struct ifnet *ifp, int disable) |
| 1388 | { |
| 1389 | struct xennet_xenbus_softc *sc = ifp->if_softc; |
| 1390 | |
| 1391 | ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); |
| 1392 | hypervisor_mask_event(sc->sc_evtchn); |
| 1393 | xennet_reset(sc); |
| 1394 | } |
| 1395 | |
| 1396 | void |
| 1397 | xennet_reset(struct xennet_xenbus_softc *sc) |
| 1398 | { |
| 1399 | |
| 1400 | DPRINTFN(XEDB_FOLLOW, ("%s: xennet_reset()\n" , |
| 1401 | device_xname(sc->sc_dev))); |
| 1402 | } |
| 1403 | |
| 1404 | #if defined(NFS_BOOT_BOOTSTATIC) |
| 1405 | int |
| 1406 | xennet_bootstatic_callback(struct nfs_diskless *nd) |
| 1407 | { |
| 1408 | #if 0 |
| 1409 | struct ifnet *ifp = nd->nd_ifp; |
| 1410 | struct xennet_xenbus_softc *sc = |
| 1411 | (struct xennet_xenbus_softc *)ifp->if_softc; |
| 1412 | #endif |
| 1413 | int flags = 0; |
| 1414 | union xen_cmdline_parseinfo xcp; |
| 1415 | struct sockaddr_in *sin; |
| 1416 | |
| 1417 | memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); |
| 1418 | xcp.xcp_netinfo.xi_ifno = /* XXX sc->sc_ifno */ 0; |
| 1419 | xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; |
| 1420 | xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); |
| 1421 | |
| 1422 | if (xcp.xcp_netinfo.xi_root[0] != '\0') { |
| 1423 | flags |= NFS_BOOT_HAS_SERVER; |
| 1424 | if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) |
| 1425 | flags |= NFS_BOOT_HAS_ROOTPATH; |
| 1426 | } |
| 1427 | |
| 1428 | nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); |
| 1429 | nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); |
| 1430 | nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); |
| 1431 | |
| 1432 | sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; |
| 1433 | memset((void *)sin, 0, sizeof(*sin)); |
| 1434 | sin->sin_len = sizeof(*sin); |
| 1435 | sin->sin_family = AF_INET; |
| 1436 | sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); |
| 1437 | |
| 1438 | if (nd->nd_myip.s_addr) |
| 1439 | flags |= NFS_BOOT_HAS_MYIP; |
| 1440 | if (nd->nd_gwip.s_addr) |
| 1441 | flags |= NFS_BOOT_HAS_GWIP; |
| 1442 | if (nd->nd_mask.s_addr) |
| 1443 | flags |= NFS_BOOT_HAS_MASK; |
| 1444 | if (sin->sin_addr.s_addr) |
| 1445 | flags |= NFS_BOOT_HAS_SERVADDR; |
| 1446 | |
| 1447 | return flags; |
| 1448 | } |
| 1449 | #endif /* defined(NFS_BOOT_BOOTSTATIC) */ |
| 1450 | |
| 1451 | #ifdef XENNET_DEBUG_DUMP |
| 1452 | #define XCHR(x) hexdigits[(x) & 0xf] |
| 1453 | static void |
| 1454 | xennet_hex_dump(const unsigned char *pkt, size_t len, const char *type, int id) |
| 1455 | { |
| 1456 | size_t i, j; |
| 1457 | |
| 1458 | printf("pkt %p len %zd/%zx type %s id %d\n" , pkt, len, len, type, id); |
| 1459 | printf("00000000 " ); |
| 1460 | for(i=0; i<len; i++) { |
| 1461 | printf("%c%c " , XCHR(pkt[i]>>4), XCHR(pkt[i])); |
| 1462 | if ((i+1) % 16 == 8) |
| 1463 | printf(" " ); |
| 1464 | if ((i+1) % 16 == 0) { |
| 1465 | printf(" %c" , '|'); |
| 1466 | for(j=0; j<16; j++) |
| 1467 | printf("%c" , pkt[i-15+j]>=32 && |
| 1468 | pkt[i-15+j]<127?pkt[i-15+j]:'.'); |
| 1469 | printf("%c\n%c%c%c%c%c%c%c%c " , '|', |
| 1470 | XCHR((i+1)>>28), XCHR((i+1)>>24), |
| 1471 | XCHR((i+1)>>20), XCHR((i+1)>>16), |
| 1472 | XCHR((i+1)>>12), XCHR((i+1)>>8), |
| 1473 | XCHR((i+1)>>4), XCHR(i+1)); |
| 1474 | } |
| 1475 | } |
| 1476 | printf("\n" ); |
| 1477 | } |
| 1478 | #undef XCHR |
| 1479 | #endif |
| 1480 | |