1 /* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2014 genua mbh <info@genua.de> 5 * Copyright (c) 2014 Fixup Software Ltd. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*- 21 * Based on BSD-licensed source modules in the Linux iwlwifi driver, 22 * which were used as the reference documentation for this implementation. 23 * 24 * Driver version we are currently based off of is 25 * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd) 26 * 27 *********************************************************************** 28 * 29 * This file is provided under a dual BSD/GPLv2 license. When using or 30 * redistributing this file, you may do so under either license. 31 * 32 * GPL LICENSE SUMMARY 33 * 34 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved. 35 * 36 * This program is free software; you can redistribute it and/or modify 37 * it under the terms of version 2 of the GNU General Public License as 38 * published by the Free Software Foundation. 39 * 40 * This program is distributed in the hope that it will be useful, but 41 * WITHOUT ANY WARRANTY; without even the implied warranty of 42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 43 * General Public License for more details. 44 * 45 * You should have received a copy of the GNU General Public License 46 * along with this program; if not, write to the Free Software 47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 48 * USA 49 * 50 * The full GNU General Public License is included in this distribution 51 * in the file called COPYING. 52 * 53 * Contact Information: 54 * Intel Linux Wireless <ilw@linux.intel.com> 55 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 56 * 57 * 58 * BSD LICENSE 59 * 60 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. 61 * All rights reserved. 62 * 63 * Redistribution and use in source and binary forms, with or without 64 * modification, are permitted provided that the following conditions 65 * are met: 66 * 67 * * Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * * Redistributions in binary form must reproduce the above copyright 70 * notice, this list of conditions and the following disclaimer in 71 * the documentation and/or other materials provided with the 72 * distribution. 73 * * Neither the name Intel Corporation nor the names of its 74 * contributors may be used to endorse or promote products derived 75 * from this software without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 78 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 79 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 80 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 81 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 82 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 83 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 84 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 85 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 86 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 87 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 88 */ 89 90 /*- 91 * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr> 92 * 93 * Permission to use, copy, modify, and distribute this software for any 94 * purpose with or without fee is hereby granted, provided that the above 95 * copyright notice and this permission notice appear in all copies. 96 * 97 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 98 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 99 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 100 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 101 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 102 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 103 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 104 */ 105 #include <sys/cdefs.h> 106 #include "opt_wlan.h" 107 #include "opt_iwm.h" 108 109 #include <sys/param.h> 110 #include <sys/bus.h> 111 #include <sys/conf.h> 112 #include <sys/endian.h> 113 #include <sys/firmware.h> 114 #include <sys/kernel.h> 115 #include <sys/malloc.h> 116 #include <sys/mbuf.h> 117 #include <sys/mutex.h> 118 #include <sys/module.h> 119 #include <sys/proc.h> 120 #include <sys/rman.h> 121 #include <sys/socket.h> 122 #include <sys/sockio.h> 123 #include <sys/sysctl.h> 124 #include <sys/linker.h> 125 126 #include <machine/bus.h> 127 #include <machine/endian.h> 128 #include <machine/resource.h> 129 130 #include <dev/pci/pcivar.h> 131 #include <dev/pci/pcireg.h> 132 133 #include <net/bpf.h> 134 135 #include <net/if.h> 136 #include <net/if_var.h> 137 #include <net/if_arp.h> 138 #include <net/if_dl.h> 139 #include <net/if_media.h> 140 #include <net/if_types.h> 141 142 #include <netinet/in.h> 143 #include <netinet/in_systm.h> 144 #include <netinet/if_ether.h> 145 #include <netinet/ip.h> 146 147 #include <net80211/ieee80211_var.h> 148 #include <net80211/ieee80211_regdomain.h> 149 #include <net80211/ieee80211_ratectl.h> 150 #include <net80211/ieee80211_radiotap.h> 151 152 #include <dev/iwm/if_iwmreg.h> 153 #include <dev/iwm/if_iwmvar.h> 154 #include <dev/iwm/if_iwm_config.h> 155 #include <dev/iwm/if_iwm_debug.h> 156 #include <dev/iwm/if_iwm_binding.h> 157 #include <dev/iwm/if_iwm_util.h> 158 #include <dev/iwm/if_iwm_pcie_trans.h> 159 160 /* 161 * Send a command to the firmware. We try to implement the Linux 162 * driver interface for the routine. 163 * mostly from if_iwn (iwn_cmd()). 164 * 165 * For now, we always copy the first part and map the second one (if it exists). 166 */ 167 int 168 iwm_send_cmd(struct iwm_softc *sc, struct iwm_host_cmd *hcmd) 169 { 170 struct iwm_tx_ring *ring = &sc->txq[IWM_CMD_QUEUE]; 171 struct iwm_tfd *desc; 172 struct iwm_tx_data *txdata = NULL; 173 struct iwm_device_cmd *cmd; 174 struct mbuf *m; 175 bus_dma_segment_t seg; 176 bus_addr_t paddr; 177 uint32_t addr_lo; 178 int error = 0, i, paylen, off; 179 int code; 180 int async, wantresp; 181 int group_id; 182 int nsegs; 183 size_t hdrlen, datasz; 184 uint8_t *data; 185 186 code = hcmd->id; 187 async = hcmd->flags & IWM_CMD_ASYNC; 188 wantresp = hcmd->flags & IWM_CMD_WANT_SKB; 189 data = NULL; 190 191 for (i = 0, paylen = 0; i < nitems(hcmd->len); i++) { 192 paylen += hcmd->len[i]; 193 } 194 195 /* if the command wants an answer, busy sc_cmd_resp */ 196 if (wantresp) { 197 KASSERT(!async, ("invalid async parameter")); 198 while (sc->sc_wantresp != -1) 199 msleep(&sc->sc_wantresp, &sc->sc_mtx, 0, "iwmcmdsl", 0); 200 sc->sc_wantresp = ring->qid << 16 | ring->cur; 201 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 202 "wantresp is %x\n", sc->sc_wantresp); 203 } 204 205 /* 206 * Is the hardware still available? (after e.g. above wait). 207 */ 208 if (sc->sc_flags & IWM_FLAG_STOPPED) { 209 error = ENXIO; 210 goto out; 211 } 212 213 desc = &ring->desc[ring->cur]; 214 txdata = &ring->data[ring->cur]; 215 216 group_id = iwm_cmd_groupid(code); 217 if (group_id != 0) { 218 hdrlen = sizeof(cmd->hdr_wide); 219 datasz = sizeof(cmd->data_wide); 220 } else { 221 hdrlen = sizeof(cmd->hdr); 222 datasz = sizeof(cmd->data); 223 } 224 225 if (paylen > datasz) { 226 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 227 "large command paylen=%u len0=%u\n", 228 paylen, hcmd->len[0]); 229 /* Command is too large */ 230 size_t totlen = hdrlen + paylen; 231 if (paylen > IWM_MAX_CMD_PAYLOAD_SIZE) { 232 device_printf(sc->sc_dev, 233 "firmware command too long (%zd bytes)\n", 234 totlen); 235 error = EINVAL; 236 goto out; 237 } 238 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, IWM_RBUF_SIZE); 239 if (m == NULL) { 240 error = ENOBUFS; 241 goto out; 242 } 243 244 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 245 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, 246 txdata->map, m, &seg, &nsegs, BUS_DMA_NOWAIT); 247 if (error != 0) { 248 device_printf(sc->sc_dev, 249 "%s: can't map mbuf, error %d\n", __func__, error); 250 m_freem(m); 251 goto out; 252 } 253 txdata->m = m; /* mbuf will be freed in iwm_cmd_done() */ 254 cmd = mtod(m, struct iwm_device_cmd *); 255 paddr = seg.ds_addr; 256 } else { 257 cmd = &ring->cmd[ring->cur]; 258 paddr = txdata->cmd_paddr; 259 } 260 261 if (group_id != 0) { 262 cmd->hdr_wide.opcode = iwm_cmd_opcode(code); 263 cmd->hdr_wide.group_id = group_id; 264 cmd->hdr_wide.qid = ring->qid; 265 cmd->hdr_wide.idx = ring->cur; 266 cmd->hdr_wide.length = htole16(paylen); 267 cmd->hdr_wide.version = iwm_cmd_version(code); 268 data = cmd->data_wide; 269 } else { 270 cmd->hdr.code = iwm_cmd_opcode(code); 271 cmd->hdr.flags = 0; 272 cmd->hdr.qid = ring->qid; 273 cmd->hdr.idx = ring->cur; 274 data = cmd->data; 275 } 276 277 for (i = 0, off = 0; i < nitems(hcmd->data); i++) { 278 if (hcmd->len[i] == 0) 279 continue; 280 memcpy(data + off, hcmd->data[i], hcmd->len[i]); 281 off += hcmd->len[i]; 282 } 283 KASSERT(off == paylen, ("off %d != paylen %d", off, paylen)); 284 285 /* lo field is not aligned */ 286 addr_lo = htole32((uint32_t)paddr); 287 memcpy(&desc->tbs[0].lo, &addr_lo, sizeof(uint32_t)); 288 desc->tbs[0].hi_n_len = htole16(iwm_get_dma_hi_addr(paddr) 289 | ((hdrlen + paylen) << 4)); 290 desc->num_tbs = 1; 291 292 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 293 "iwm_send_cmd 0x%x size=%lu %s\n", 294 code, 295 (unsigned long) (hcmd->len[0] + hcmd->len[1] + hdrlen), 296 async ? " (async)" : ""); 297 298 if (paylen > datasz) { 299 bus_dmamap_sync(ring->data_dmat, txdata->map, 300 BUS_DMASYNC_PREWRITE); 301 } else { 302 bus_dmamap_sync(ring->cmd_dma.tag, ring->cmd_dma.map, 303 BUS_DMASYNC_PREWRITE); 304 } 305 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 306 BUS_DMASYNC_PREWRITE); 307 308 error = iwm_pcie_set_cmd_in_flight(sc); 309 if (error) 310 goto out; 311 ring->queued++; 312 313 #if 0 314 iwm_update_sched(sc, ring->qid, ring->cur, 0, 0); 315 #endif 316 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 317 "sending command 0x%x qid %d, idx %d\n", 318 code, ring->qid, ring->cur); 319 320 /* Kick command ring. */ 321 ring->cur = (ring->cur + 1) % IWM_TX_RING_COUNT; 322 IWM_WRITE(sc, IWM_HBUS_TARG_WRPTR, ring->qid << 8 | ring->cur); 323 324 if (!async) { 325 /* m..m-mmyy-mmyyyy-mym-ym m-my generation */ 326 int generation = sc->sc_generation; 327 error = msleep(desc, &sc->sc_mtx, PCATCH, "iwmcmd", hz); 328 if (error == 0) { 329 /* if hardware is no longer up, return error */ 330 if (generation != sc->sc_generation) { 331 error = ENXIO; 332 } else { 333 hcmd->resp_pkt = (void *)sc->sc_cmd_resp; 334 } 335 } 336 } 337 out: 338 if (wantresp && error != 0) { 339 iwm_free_resp(sc, hcmd); 340 } 341 342 return error; 343 } 344 345 /* iwlwifi: mvm/utils.c */ 346 int 347 iwm_send_cmd_pdu(struct iwm_softc *sc, uint32_t id, 348 uint32_t flags, uint16_t len, const void *data) 349 { 350 struct iwm_host_cmd cmd = { 351 .id = id, 352 .len = { len, }, 353 .data = { data, }, 354 .flags = flags, 355 }; 356 357 return iwm_send_cmd(sc, &cmd); 358 } 359 360 /* iwlwifi: mvm/utils.c */ 361 int 362 iwm_send_cmd_status(struct iwm_softc *sc, 363 struct iwm_host_cmd *cmd, uint32_t *status) 364 { 365 struct iwm_rx_packet *pkt; 366 struct iwm_cmd_response *resp; 367 int error, resp_len; 368 369 KASSERT((cmd->flags & IWM_CMD_WANT_SKB) == 0, 370 ("invalid command")); 371 cmd->flags |= IWM_CMD_SYNC | IWM_CMD_WANT_SKB; 372 373 if ((error = iwm_send_cmd(sc, cmd)) != 0) 374 return error; 375 pkt = cmd->resp_pkt; 376 377 /* Can happen if RFKILL is asserted */ 378 if (!pkt) { 379 error = 0; 380 goto out_free_resp; 381 } 382 383 if (pkt->hdr.flags & IWM_CMD_FAILED_MSK) { 384 error = EIO; 385 goto out_free_resp; 386 } 387 388 resp_len = iwm_rx_packet_payload_len(pkt); 389 if (resp_len != sizeof(*resp)) { 390 error = EIO; 391 goto out_free_resp; 392 } 393 394 resp = (void *)pkt->data; 395 *status = le32toh(resp->status); 396 out_free_resp: 397 iwm_free_resp(sc, cmd); 398 return error; 399 } 400 401 /* iwlwifi/mvm/utils.c */ 402 int 403 iwm_send_cmd_pdu_status(struct iwm_softc *sc, uint32_t id, 404 uint16_t len, const void *data, uint32_t *status) 405 { 406 struct iwm_host_cmd cmd = { 407 .id = id, 408 .len = { len, }, 409 .data = { data, }, 410 }; 411 412 return iwm_send_cmd_status(sc, &cmd, status); 413 } 414 415 void 416 iwm_free_resp(struct iwm_softc *sc, struct iwm_host_cmd *hcmd) 417 { 418 KASSERT(sc->sc_wantresp != -1, ("already freed")); 419 KASSERT((hcmd->flags & (IWM_CMD_WANT_SKB|IWM_CMD_SYNC)) 420 == (IWM_CMD_WANT_SKB|IWM_CMD_SYNC), ("invalid flags")); 421 sc->sc_wantresp = -1; 422 wakeup(&sc->sc_wantresp); 423 } 424 425 static void 426 iwm_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 427 { 428 if (error != 0) 429 return; 430 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 431 *(bus_addr_t *)arg = segs[0].ds_addr; 432 } 433 434 int 435 iwm_dma_contig_alloc(bus_dma_tag_t tag, struct iwm_dma_info *dma, 436 bus_size_t size, bus_size_t alignment) 437 { 438 int error; 439 440 dma->tag = NULL; 441 dma->map = NULL; 442 dma->size = size; 443 dma->vaddr = NULL; 444 445 error = bus_dma_tag_create(tag, alignment, 446 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, size, 447 1, size, 0, NULL, NULL, &dma->tag); 448 if (error != 0) 449 goto fail; 450 451 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr, 452 BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_COHERENT, &dma->map); 453 if (error != 0) 454 goto fail; 455 456 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr, size, 457 iwm_dma_map_addr, &dma->paddr, BUS_DMA_NOWAIT); 458 if (error != 0) { 459 bus_dmamem_free(dma->tag, dma->vaddr, dma->map); 460 dma->vaddr = NULL; 461 goto fail; 462 } 463 464 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 465 466 return 0; 467 468 fail: 469 iwm_dma_contig_free(dma); 470 471 return error; 472 } 473 474 void 475 iwm_dma_contig_free(struct iwm_dma_info *dma) 476 { 477 if (dma->vaddr != NULL) { 478 bus_dmamap_sync(dma->tag, dma->map, 479 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 480 bus_dmamap_unload(dma->tag, dma->map); 481 bus_dmamem_free(dma->tag, dma->vaddr, dma->map); 482 dma->vaddr = NULL; 483 } 484 if (dma->tag != NULL) { 485 bus_dma_tag_destroy(dma->tag); 486 dma->tag = NULL; 487 } 488 } 489 490 /** 491 * iwm_send_lq_cmd() - Send link quality command 492 * @init: This command is sent as part of station initialization right 493 * after station has been added. 494 * 495 * The link quality command is sent as the last step of station creation. 496 * This is the special case in which init is set and we call a callback in 497 * this case to clear the state indicating that station creation is in 498 * progress. 499 */ 500 int 501 iwm_send_lq_cmd(struct iwm_softc *sc, struct iwm_lq_cmd *lq, boolean_t init) 502 { 503 struct iwm_host_cmd cmd = { 504 .id = IWM_LQ_CMD, 505 .len = { sizeof(struct iwm_lq_cmd), }, 506 .flags = init ? 0 : IWM_CMD_ASYNC, 507 .data = { lq, }, 508 }; 509 510 if (lq->sta_id == IWM_STATION_COUNT) 511 return EINVAL; 512 513 return iwm_send_cmd(sc, &cmd); 514 } 515 516 boolean_t 517 iwm_rx_diversity_allowed(struct iwm_softc *sc) 518 { 519 if (num_of_ant(iwm_get_valid_rx_ant(sc)) == 1) 520 return FALSE; 521 522 /* 523 * XXX Also return FALSE when SMPS (Spatial Multiplexing Powersave) 524 * is used on any vap (in the future). 525 */ 526 527 return TRUE; 528 } 529