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 __FBSDID("$FreeBSD$"); 107 108 #include "opt_wlan.h" 109 #include "opt_iwm.h" 110 111 #include <sys/param.h> 112 #include <sys/bus.h> 113 #include <sys/conf.h> 114 #include <sys/endian.h> 115 #include <sys/firmware.h> 116 #include <sys/kernel.h> 117 #include <sys/malloc.h> 118 #include <sys/mbuf.h> 119 #include <sys/mutex.h> 120 #include <sys/module.h> 121 #include <sys/proc.h> 122 #include <sys/rman.h> 123 #include <sys/socket.h> 124 #include <sys/sockio.h> 125 #include <sys/sysctl.h> 126 #include <sys/linker.h> 127 128 #include <machine/bus.h> 129 #include <machine/endian.h> 130 #include <machine/resource.h> 131 132 #include <dev/pci/pcivar.h> 133 #include <dev/pci/pcireg.h> 134 135 #include <net/bpf.h> 136 137 #include <net/if.h> 138 #include <net/if_var.h> 139 #include <net/if_arp.h> 140 #include <net/if_dl.h> 141 #include <net/if_media.h> 142 #include <net/if_types.h> 143 144 #include <netinet/in.h> 145 #include <netinet/in_systm.h> 146 #include <netinet/if_ether.h> 147 #include <netinet/ip.h> 148 149 #include <net80211/ieee80211_var.h> 150 #include <net80211/ieee80211_regdomain.h> 151 #include <net80211/ieee80211_ratectl.h> 152 #include <net80211/ieee80211_radiotap.h> 153 154 #include <dev/iwm/if_iwmreg.h> 155 #include <dev/iwm/if_iwmvar.h> 156 #include <dev/iwm/if_iwm_config.h> 157 #include <dev/iwm/if_iwm_debug.h> 158 #include <dev/iwm/if_iwm_binding.h> 159 #include <dev/iwm/if_iwm_util.h> 160 #include <dev/iwm/if_iwm_pcie_trans.h> 161 162 /* 163 * Send a command to the firmware. We try to implement the Linux 164 * driver interface for the routine. 165 * mostly from if_iwn (iwn_cmd()). 166 * 167 * For now, we always copy the first part and map the second one (if it exists). 168 */ 169 int 170 iwm_send_cmd(struct iwm_softc *sc, struct iwm_host_cmd *hcmd) 171 { 172 struct iwm_tx_ring *ring = &sc->txq[IWM_MVM_CMD_QUEUE]; 173 struct iwm_tfd *desc; 174 struct iwm_tx_data *txdata = NULL; 175 struct iwm_device_cmd *cmd; 176 struct mbuf *m; 177 bus_dma_segment_t seg; 178 bus_addr_t paddr; 179 uint32_t addr_lo; 180 int error = 0, i, paylen, off; 181 int code; 182 int async, wantresp; 183 int group_id; 184 int nsegs; 185 size_t hdrlen, datasz; 186 uint8_t *data; 187 188 code = hcmd->id; 189 async = hcmd->flags & IWM_CMD_ASYNC; 190 wantresp = hcmd->flags & IWM_CMD_WANT_SKB; 191 data = NULL; 192 193 for (i = 0, paylen = 0; i < nitems(hcmd->len); i++) { 194 paylen += hcmd->len[i]; 195 } 196 197 /* if the command wants an answer, busy sc_cmd_resp */ 198 if (wantresp) { 199 KASSERT(!async, ("invalid async parameter")); 200 while (sc->sc_wantresp != -1) 201 msleep(&sc->sc_wantresp, &sc->sc_mtx, 0, "iwmcmdsl", 0); 202 sc->sc_wantresp = ring->qid << 16 | ring->cur; 203 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 204 "wantresp is %x\n", sc->sc_wantresp); 205 } 206 207 /* 208 * Is the hardware still available? (after e.g. above wait). 209 */ 210 if (sc->sc_flags & IWM_FLAG_STOPPED) { 211 error = ENXIO; 212 goto out; 213 } 214 215 desc = &ring->desc[ring->cur]; 216 txdata = &ring->data[ring->cur]; 217 218 group_id = iwm_cmd_groupid(code); 219 if (group_id != 0) { 220 hdrlen = sizeof(cmd->hdr_wide); 221 datasz = sizeof(cmd->data_wide); 222 } else { 223 hdrlen = sizeof(cmd->hdr); 224 datasz = sizeof(cmd->data); 225 } 226 227 if (paylen > datasz) { 228 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 229 "large command paylen=%u len0=%u\n", 230 paylen, hcmd->len[0]); 231 /* Command is too large */ 232 size_t totlen = hdrlen + paylen; 233 if (paylen > IWM_MAX_CMD_PAYLOAD_SIZE) { 234 device_printf(sc->sc_dev, 235 "firmware command too long (%zd bytes)\n", 236 totlen); 237 error = EINVAL; 238 goto out; 239 } 240 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, IWM_RBUF_SIZE); 241 if (m == NULL) { 242 error = ENOBUFS; 243 goto out; 244 } 245 246 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 247 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, 248 txdata->map, m, &seg, &nsegs, BUS_DMA_NOWAIT); 249 if (error != 0) { 250 device_printf(sc->sc_dev, 251 "%s: can't map mbuf, error %d\n", __func__, error); 252 m_freem(m); 253 goto out; 254 } 255 txdata->m = m; /* mbuf will be freed in iwm_cmd_done() */ 256 cmd = mtod(m, struct iwm_device_cmd *); 257 paddr = seg.ds_addr; 258 } else { 259 cmd = &ring->cmd[ring->cur]; 260 paddr = txdata->cmd_paddr; 261 } 262 263 if (group_id != 0) { 264 cmd->hdr_wide.opcode = iwm_cmd_opcode(code); 265 cmd->hdr_wide.group_id = group_id; 266 cmd->hdr_wide.qid = ring->qid; 267 cmd->hdr_wide.idx = ring->cur; 268 cmd->hdr_wide.length = htole16(paylen); 269 cmd->hdr_wide.version = iwm_cmd_version(code); 270 data = cmd->data_wide; 271 } else { 272 cmd->hdr.code = iwm_cmd_opcode(code); 273 cmd->hdr.flags = 0; 274 cmd->hdr.qid = ring->qid; 275 cmd->hdr.idx = ring->cur; 276 data = cmd->data; 277 } 278 279 for (i = 0, off = 0; i < nitems(hcmd->data); i++) { 280 if (hcmd->len[i] == 0) 281 continue; 282 memcpy(data + off, hcmd->data[i], hcmd->len[i]); 283 off += hcmd->len[i]; 284 } 285 KASSERT(off == paylen, ("off %d != paylen %d", off, paylen)); 286 287 /* lo field is not aligned */ 288 addr_lo = htole32((uint32_t)paddr); 289 memcpy(&desc->tbs[0].lo, &addr_lo, sizeof(uint32_t)); 290 desc->tbs[0].hi_n_len = htole16(iwm_get_dma_hi_addr(paddr) 291 | ((hdrlen + paylen) << 4)); 292 desc->num_tbs = 1; 293 294 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 295 "iwm_send_cmd 0x%x size=%lu %s\n", 296 code, 297 (unsigned long) (hcmd->len[0] + hcmd->len[1] + hdrlen), 298 async ? " (async)" : ""); 299 300 if (paylen > datasz) { 301 bus_dmamap_sync(ring->data_dmat, txdata->map, 302 BUS_DMASYNC_PREWRITE); 303 } else { 304 bus_dmamap_sync(ring->cmd_dma.tag, ring->cmd_dma.map, 305 BUS_DMASYNC_PREWRITE); 306 } 307 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 308 BUS_DMASYNC_PREWRITE); 309 310 error = iwm_pcie_set_cmd_in_flight(sc); 311 if (error) 312 goto out; 313 ring->queued++; 314 315 #if 0 316 iwm_update_sched(sc, ring->qid, ring->cur, 0, 0); 317 #endif 318 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 319 "sending command 0x%x qid %d, idx %d\n", 320 code, ring->qid, ring->cur); 321 322 /* Kick command ring. */ 323 ring->cur = (ring->cur + 1) % IWM_TX_RING_COUNT; 324 IWM_WRITE(sc, IWM_HBUS_TARG_WRPTR, ring->qid << 8 | ring->cur); 325 326 if (!async) { 327 /* m..m-mmyy-mmyyyy-mym-ym m-my generation */ 328 int generation = sc->sc_generation; 329 error = msleep(desc, &sc->sc_mtx, PCATCH, "iwmcmd", hz); 330 if (error == 0) { 331 /* if hardware is no longer up, return error */ 332 if (generation != sc->sc_generation) { 333 error = ENXIO; 334 } else { 335 hcmd->resp_pkt = (void *)sc->sc_cmd_resp; 336 } 337 } 338 } 339 out: 340 if (wantresp && error != 0) { 341 iwm_free_resp(sc, hcmd); 342 } 343 344 return error; 345 } 346 347 /* iwlwifi: mvm/utils.c */ 348 int 349 iwm_mvm_send_cmd_pdu(struct iwm_softc *sc, uint32_t id, 350 uint32_t flags, uint16_t len, const void *data) 351 { 352 struct iwm_host_cmd cmd = { 353 .id = id, 354 .len = { len, }, 355 .data = { data, }, 356 .flags = flags, 357 }; 358 359 return iwm_send_cmd(sc, &cmd); 360 } 361 362 /* iwlwifi: mvm/utils.c */ 363 int 364 iwm_mvm_send_cmd_status(struct iwm_softc *sc, 365 struct iwm_host_cmd *cmd, uint32_t *status) 366 { 367 struct iwm_rx_packet *pkt; 368 struct iwm_cmd_response *resp; 369 int error, resp_len; 370 371 KASSERT((cmd->flags & IWM_CMD_WANT_SKB) == 0, 372 ("invalid command")); 373 cmd->flags |= IWM_CMD_SYNC | IWM_CMD_WANT_SKB; 374 375 if ((error = iwm_send_cmd(sc, cmd)) != 0) 376 return error; 377 pkt = cmd->resp_pkt; 378 379 /* Can happen if RFKILL is asserted */ 380 if (!pkt) { 381 error = 0; 382 goto out_free_resp; 383 } 384 385 if (pkt->hdr.flags & IWM_CMD_FAILED_MSK) { 386 error = EIO; 387 goto out_free_resp; 388 } 389 390 resp_len = iwm_rx_packet_payload_len(pkt); 391 if (resp_len != sizeof(*resp)) { 392 error = EIO; 393 goto out_free_resp; 394 } 395 396 resp = (void *)pkt->data; 397 *status = le32toh(resp->status); 398 out_free_resp: 399 iwm_free_resp(sc, cmd); 400 return error; 401 } 402 403 /* iwlwifi/mvm/utils.c */ 404 int 405 iwm_mvm_send_cmd_pdu_status(struct iwm_softc *sc, uint32_t id, 406 uint16_t len, const void *data, uint32_t *status) 407 { 408 struct iwm_host_cmd cmd = { 409 .id = id, 410 .len = { len, }, 411 .data = { data, }, 412 }; 413 414 return iwm_mvm_send_cmd_status(sc, &cmd, status); 415 } 416 417 void 418 iwm_free_resp(struct iwm_softc *sc, struct iwm_host_cmd *hcmd) 419 { 420 KASSERT(sc->sc_wantresp != -1, ("already freed")); 421 KASSERT((hcmd->flags & (IWM_CMD_WANT_SKB|IWM_CMD_SYNC)) 422 == (IWM_CMD_WANT_SKB|IWM_CMD_SYNC), ("invalid flags")); 423 sc->sc_wantresp = -1; 424 wakeup(&sc->sc_wantresp); 425 } 426 427 static void 428 iwm_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 429 { 430 if (error != 0) 431 return; 432 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 433 *(bus_addr_t *)arg = segs[0].ds_addr; 434 } 435 436 int 437 iwm_dma_contig_alloc(bus_dma_tag_t tag, struct iwm_dma_info *dma, 438 bus_size_t size, bus_size_t alignment) 439 { 440 int error; 441 442 dma->tag = NULL; 443 dma->map = NULL; 444 dma->size = size; 445 dma->vaddr = NULL; 446 447 error = bus_dma_tag_create(tag, alignment, 448 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, size, 449 1, size, 0, NULL, NULL, &dma->tag); 450 if (error != 0) 451 goto fail; 452 453 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr, 454 BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_COHERENT, &dma->map); 455 if (error != 0) 456 goto fail; 457 458 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr, size, 459 iwm_dma_map_addr, &dma->paddr, BUS_DMA_NOWAIT); 460 if (error != 0) { 461 bus_dmamem_free(dma->tag, dma->vaddr, dma->map); 462 dma->vaddr = NULL; 463 goto fail; 464 } 465 466 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 467 468 return 0; 469 470 fail: 471 iwm_dma_contig_free(dma); 472 473 return error; 474 } 475 476 void 477 iwm_dma_contig_free(struct iwm_dma_info *dma) 478 { 479 if (dma->vaddr != NULL) { 480 bus_dmamap_sync(dma->tag, dma->map, 481 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 482 bus_dmamap_unload(dma->tag, dma->map); 483 bus_dmamem_free(dma->tag, dma->vaddr, dma->map); 484 dma->vaddr = NULL; 485 } 486 if (dma->tag != NULL) { 487 bus_dma_tag_destroy(dma->tag); 488 dma->tag = NULL; 489 } 490 } 491 492 boolean_t 493 iwm_mvm_rx_diversity_allowed(struct iwm_softc *sc) 494 { 495 if (num_of_ant(iwm_mvm_get_valid_rx_ant(sc)) == 1) 496 return FALSE; 497 498 /* 499 * XXX Also return FALSE when SMPS (Spatial Multiplexing Powersave) 500 * is used on any vap (in the future). 501 */ 502 503 return TRUE; 504 } 505