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" 109 110 #include <sys/param.h> 111 #include <sys/bus.h> 112 #include <sys/conf.h> 113 #include <sys/endian.h> 114 #include <sys/firmware.h> 115 #include <sys/kernel.h> 116 #include <sys/malloc.h> 117 #include <sys/mbuf.h> 118 #include <sys/mutex.h> 119 #include <sys/module.h> 120 #include <sys/proc.h> 121 #include <sys/rman.h> 122 #include <sys/socket.h> 123 #include <sys/sockio.h> 124 #include <sys/sysctl.h> 125 #include <sys/linker.h> 126 127 #include <machine/bus.h> 128 #include <machine/endian.h> 129 #include <machine/resource.h> 130 131 #include <dev/pci/pcivar.h> 132 #include <dev/pci/pcireg.h> 133 134 #include <net/bpf.h> 135 136 #include <net/if.h> 137 #include <net/if_var.h> 138 #include <net/if_arp.h> 139 #include <net/if_dl.h> 140 #include <net/if_media.h> 141 #include <net/if_types.h> 142 143 #include <netinet/in.h> 144 #include <netinet/in_systm.h> 145 #include <netinet/if_ether.h> 146 #include <netinet/ip.h> 147 148 #include <net80211/ieee80211_var.h> 149 #include <net80211/ieee80211_regdomain.h> 150 #include <net80211/ieee80211_ratectl.h> 151 #include <net80211/ieee80211_radiotap.h> 152 153 #include <dev/iwm/if_iwmreg.h> 154 #include <dev/iwm/if_iwmvar.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_MVM_CMD_QUEUE]; 171 struct iwm_tfd *desc; 172 struct iwm_tx_data *data; 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 nsegs; 182 183 code = hcmd->id; 184 async = hcmd->flags & IWM_CMD_ASYNC; 185 wantresp = hcmd->flags & IWM_CMD_WANT_SKB; 186 187 for (i = 0, paylen = 0; i < nitems(hcmd->len); i++) { 188 paylen += hcmd->len[i]; 189 } 190 191 /* if the command wants an answer, busy sc_cmd_resp */ 192 if (wantresp) { 193 KASSERT(!async, ("invalid async parameter")); 194 while (sc->sc_wantresp != -1) 195 msleep(&sc->sc_wantresp, &sc->sc_mtx, 0, "iwmcmdsl", 0); 196 sc->sc_wantresp = ring->qid << 16 | ring->cur; 197 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 198 "wantresp is %x\n", sc->sc_wantresp); 199 } 200 201 /* 202 * Is the hardware still available? (after e.g. above wait). 203 */ 204 if (sc->sc_flags & IWM_FLAG_STOPPED) { 205 error = ENXIO; 206 goto out; 207 } 208 209 desc = &ring->desc[ring->cur]; 210 data = &ring->data[ring->cur]; 211 212 if (paylen > sizeof(cmd->data)) { 213 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 214 "large command paylen=%u len0=%u\n", 215 paylen, hcmd->len[0]); 216 /* Command is too large */ 217 if (paylen > IWM_MAX_CMD_PAYLOAD_SIZE) { 218 device_printf(sc->sc_dev, 219 "firmware command too long (%zd bytes)\n", 220 paylen + sizeof(cmd->hdr)); 221 error = EINVAL; 222 goto out; 223 } 224 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, IWM_RBUF_SIZE); 225 if (m == NULL) { 226 error = ENOBUFS; 227 goto out; 228 } 229 230 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 231 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, 232 data->map, m, &seg, &nsegs, BUS_DMA_NOWAIT); 233 if (error != 0) { 234 device_printf(sc->sc_dev, 235 "%s: can't map mbuf, error %d\n", __func__, error); 236 m_freem(m); 237 goto out; 238 } 239 data->m = m; /* mbuf will be freed in iwm_cmd_done() */ 240 cmd = mtod(m, struct iwm_device_cmd *); 241 paddr = seg.ds_addr; 242 } else { 243 cmd = &ring->cmd[ring->cur]; 244 paddr = data->cmd_paddr; 245 } 246 247 cmd->hdr.code = code; 248 cmd->hdr.flags = 0; 249 cmd->hdr.qid = ring->qid; 250 cmd->hdr.idx = ring->cur; 251 252 for (i = 0, off = 0; i < nitems(hcmd->data); i++) { 253 if (hcmd->len[i] == 0) 254 continue; 255 memcpy(cmd->data + off, hcmd->data[i], hcmd->len[i]); 256 off += hcmd->len[i]; 257 } 258 KASSERT(off == paylen, ("off %d != paylen %d", off, paylen)); 259 260 /* lo field is not aligned */ 261 addr_lo = htole32((uint32_t)paddr); 262 memcpy(&desc->tbs[0].lo, &addr_lo, sizeof(uint32_t)); 263 desc->tbs[0].hi_n_len = htole16(iwm_get_dma_hi_addr(paddr) 264 | ((sizeof(cmd->hdr) + paylen) << 4)); 265 desc->num_tbs = 1; 266 267 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 268 "%s: iwm_send_cmd 0x%x size=%lu %s\n", 269 __func__, 270 code, 271 (unsigned long) (hcmd->len[0] + hcmd->len[1] + sizeof(cmd->hdr)), 272 async ? " (async)" : ""); 273 274 if (paylen > sizeof(cmd->data)) { 275 bus_dmamap_sync(ring->data_dmat, data->map, 276 BUS_DMASYNC_PREWRITE); 277 } else { 278 bus_dmamap_sync(ring->cmd_dma.tag, ring->cmd_dma.map, 279 BUS_DMASYNC_PREWRITE); 280 } 281 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 282 BUS_DMASYNC_PREWRITE); 283 284 IWM_SETBITS(sc, IWM_CSR_GP_CNTRL, 285 IWM_CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 286 if (!iwm_poll_bit(sc, IWM_CSR_GP_CNTRL, 287 IWM_CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, 288 (IWM_CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | 289 IWM_CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000)) { 290 device_printf(sc->sc_dev, 291 "%s: acquiring device failed\n", __func__); 292 error = EBUSY; 293 goto out; 294 } 295 296 #if 0 297 iwm_update_sched(sc, ring->qid, ring->cur, 0, 0); 298 #endif 299 IWM_DPRINTF(sc, IWM_DEBUG_CMD, 300 "sending command 0x%x qid %d, idx %d\n", 301 code, ring->qid, ring->cur); 302 303 /* Kick command ring. */ 304 ring->cur = (ring->cur + 1) % IWM_TX_RING_COUNT; 305 IWM_WRITE(sc, IWM_HBUS_TARG_WRPTR, ring->qid << 8 | ring->cur); 306 307 if (!async) { 308 /* m..m-mmyy-mmyyyy-mym-ym m-my generation */ 309 int generation = sc->sc_generation; 310 error = msleep(desc, &sc->sc_mtx, PCATCH, "iwmcmd", hz); 311 if (error == 0) { 312 /* if hardware is no longer up, return error */ 313 if (generation != sc->sc_generation) { 314 error = ENXIO; 315 } else { 316 hcmd->resp_pkt = (void *)sc->sc_cmd_resp; 317 } 318 } 319 } 320 out: 321 if (wantresp && error != 0) { 322 iwm_free_resp(sc, hcmd); 323 } 324 325 return error; 326 } 327 328 /* iwlwifi: mvm/utils.c */ 329 int 330 iwm_mvm_send_cmd_pdu(struct iwm_softc *sc, uint8_t id, 331 uint32_t flags, uint16_t len, const void *data) 332 { 333 struct iwm_host_cmd cmd = { 334 .id = id, 335 .len = { len, }, 336 .data = { data, }, 337 .flags = flags, 338 }; 339 340 return iwm_send_cmd(sc, &cmd); 341 } 342 343 /* iwlwifi: mvm/utils.c */ 344 int 345 iwm_mvm_send_cmd_status(struct iwm_softc *sc, 346 struct iwm_host_cmd *cmd, uint32_t *status) 347 { 348 struct iwm_rx_packet *pkt; 349 struct iwm_cmd_response *resp; 350 int error, resp_len; 351 352 KASSERT((cmd->flags & IWM_CMD_WANT_SKB) == 0, 353 ("invalid command")); 354 cmd->flags |= IWM_CMD_SYNC | IWM_CMD_WANT_SKB; 355 356 if ((error = iwm_send_cmd(sc, cmd)) != 0) 357 return error; 358 pkt = cmd->resp_pkt; 359 360 /* Can happen if RFKILL is asserted */ 361 if (!pkt) { 362 error = 0; 363 goto out_free_resp; 364 } 365 366 if (pkt->hdr.flags & IWM_CMD_FAILED_MSK) { 367 error = EIO; 368 goto out_free_resp; 369 } 370 371 resp_len = iwm_rx_packet_payload_len(pkt); 372 if (resp_len != sizeof(*resp)) { 373 error = EIO; 374 goto out_free_resp; 375 } 376 377 resp = (void *)pkt->data; 378 *status = le32toh(resp->status); 379 out_free_resp: 380 iwm_free_resp(sc, cmd); 381 return error; 382 } 383 384 /* iwlwifi/mvm/utils.c */ 385 int 386 iwm_mvm_send_cmd_pdu_status(struct iwm_softc *sc, uint8_t id, 387 uint16_t len, const void *data, uint32_t *status) 388 { 389 struct iwm_host_cmd cmd = { 390 .id = id, 391 .len = { len, }, 392 .data = { data, }, 393 }; 394 395 return iwm_mvm_send_cmd_status(sc, &cmd, status); 396 } 397 398 void 399 iwm_free_resp(struct iwm_softc *sc, struct iwm_host_cmd *hcmd) 400 { 401 KASSERT(sc->sc_wantresp != -1, ("already freed")); 402 KASSERT((hcmd->flags & (IWM_CMD_WANT_SKB|IWM_CMD_SYNC)) 403 == (IWM_CMD_WANT_SKB|IWM_CMD_SYNC), ("invalid flags")); 404 sc->sc_wantresp = -1; 405 wakeup(&sc->sc_wantresp); 406 } 407