1 /*- 2 * Based on BSD-licensed source modules in the Linux iwlwifi driver, 3 * which were used as the reference documentation for this implementation. 4 * 5 * Driver version we are currently based off of is 6 * Linux 4.7.3 (tag id d7f6728f57e3ecbb7ef34eb7d9f564d514775d75) 7 * 8 *********************************************************************** 9 * 10 * This file is provided under a dual BSD/GPLv2 license. When using or 11 * redistributing this file, you may do so under either license. 12 * 13 * GPL LICENSE SUMMARY 14 * 15 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 16 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 17 * Copyright(c) 2016 Intel Deutschland GmbH 18 * 19 * This program is free software; you can redistribute it and/or modify 20 * it under the terms of version 2 of the GNU General Public License as 21 * published by the Free Software Foundation. 22 * 23 * This program is distributed in the hope that it will be useful, but 24 * WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 26 * General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 31 * USA 32 * 33 * The full GNU General Public License is included in this distribution 34 * in the file called COPYING. 35 * 36 * Contact Information: 37 * Intel Linux Wireless <linuxwifi@intel.com> 38 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 39 * 40 * BSD LICENSE 41 * 42 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 43 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 50 * * Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * * Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in 54 * the documentation and/or other materials provided with the 55 * distribution. 56 * * Neither the name Intel Corporation nor the names of its 57 * contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 61 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 62 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 63 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 64 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 65 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 66 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 70 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 #include <sys/cdefs.h> 74 __FBSDID("$FreeBSD$"); 75 76 #include "opt_wlan.h" 77 #include "opt_iwm.h" 78 79 #include <sys/param.h> 80 #include <sys/bus.h> 81 #include <sys/conf.h> 82 #include <sys/endian.h> 83 #include <sys/firmware.h> 84 #include <sys/kernel.h> 85 #include <sys/malloc.h> 86 #include <sys/mbuf.h> 87 #include <sys/mutex.h> 88 #include <sys/module.h> 89 #include <sys/proc.h> 90 #include <sys/rman.h> 91 #include <sys/socket.h> 92 #include <sys/sockio.h> 93 #include <sys/sysctl.h> 94 #include <sys/linker.h> 95 96 #include <machine/bus.h> 97 #include <machine/endian.h> 98 #include <machine/resource.h> 99 100 #include <dev/pci/pcivar.h> 101 #include <dev/pci/pcireg.h> 102 103 #include <net/bpf.h> 104 105 #include <net/if.h> 106 #include <net/if_var.h> 107 #include <net/if_arp.h> 108 #include <net/if_dl.h> 109 #include <net/if_media.h> 110 #include <net/if_types.h> 111 112 #include <netinet/in.h> 113 #include <netinet/in_systm.h> 114 #include <netinet/if_ether.h> 115 #include <netinet/ip.h> 116 117 #include <net80211/ieee80211_var.h> 118 #include <net80211/ieee80211_regdomain.h> 119 #include <net80211/ieee80211_ratectl.h> 120 #include <net80211/ieee80211_radiotap.h> 121 122 #include <dev/iwm/if_iwmreg.h> 123 #include <dev/iwm/if_iwmvar.h> 124 #include <dev/iwm/if_iwm_debug.h> 125 #include <dev/iwm/if_iwm_util.h> 126 #include <dev/iwm/if_iwm_fw.h> 127 128 void 129 iwm_free_fw_paging(struct iwm_softc *sc) 130 { 131 int i; 132 133 if (sc->fw_paging_db[0].fw_paging_block.vaddr == NULL) 134 return; 135 136 for (i = 0; i < IWM_NUM_OF_FW_PAGING_BLOCKS; i++) { 137 iwm_dma_contig_free(&sc->fw_paging_db[i].fw_paging_block); 138 } 139 140 memset(sc->fw_paging_db, 0, sizeof(sc->fw_paging_db)); 141 } 142 143 static int 144 iwm_fill_paging_mem(struct iwm_softc *sc, const struct iwm_fw_sects *image) 145 { 146 int sec_idx, idx; 147 uint32_t offset = 0; 148 149 /* 150 * find where is the paging image start point: 151 * if CPU2 exist and it's in paging format, then the image looks like: 152 * CPU1 sections (2 or more) 153 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2 154 * CPU2 sections (not paged) 155 * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2 156 * non paged to CPU2 paging sec 157 * CPU2 paging CSS 158 * CPU2 paging image (including instruction and data) 159 */ 160 for (sec_idx = 0; sec_idx < IWM_UCODE_SECTION_MAX; sec_idx++) { 161 if (image->fw_sect[sec_idx].offset == IWM_PAGING_SEPARATOR_SECTION) { 162 sec_idx++; 163 break; 164 } 165 } 166 167 /* 168 * If paging is enabled there should be at least 2 more sections left 169 * (one for CSS and one for Paging data) 170 */ 171 if (sec_idx >= nitems(image->fw_sect) - 1) { 172 device_printf(sc->sc_dev, 173 "Paging: Missing CSS and/or paging sections\n"); 174 iwm_free_fw_paging(sc); 175 return EINVAL; 176 } 177 178 /* copy the CSS block to the dram */ 179 IWM_DPRINTF(sc, IWM_DEBUG_FW, 180 "Paging: load paging CSS to FW, sec = %d\n", 181 sec_idx); 182 183 memcpy(sc->fw_paging_db[0].fw_paging_block.vaddr, 184 image->fw_sect[sec_idx].data, 185 sc->fw_paging_db[0].fw_paging_size); 186 187 IWM_DPRINTF(sc, IWM_DEBUG_FW, 188 "Paging: copied %d CSS bytes to first block\n", 189 sc->fw_paging_db[0].fw_paging_size); 190 191 sec_idx++; 192 193 /* 194 * copy the paging blocks to the dram 195 * loop index start from 1 since that CSS block already copied to dram 196 * and CSS index is 0. 197 * loop stop at num_of_paging_blk since that last block is not full. 198 */ 199 for (idx = 1; idx < sc->num_of_paging_blk; idx++) { 200 memcpy(sc->fw_paging_db[idx].fw_paging_block.vaddr, 201 (const char *)image->fw_sect[sec_idx].data + offset, 202 sc->fw_paging_db[idx].fw_paging_size); 203 204 IWM_DPRINTF(sc, IWM_DEBUG_FW, 205 "Paging: copied %d paging bytes to block %d\n", 206 sc->fw_paging_db[idx].fw_paging_size, 207 idx); 208 209 offset += sc->fw_paging_db[idx].fw_paging_size; 210 } 211 212 /* copy the last paging block */ 213 if (sc->num_of_pages_in_last_blk > 0) { 214 memcpy(sc->fw_paging_db[idx].fw_paging_block.vaddr, 215 (const char *)image->fw_sect[sec_idx].data + offset, 216 IWM_FW_PAGING_SIZE * sc->num_of_pages_in_last_blk); 217 218 IWM_DPRINTF(sc, IWM_DEBUG_FW, 219 "Paging: copied %d pages in the last block %d\n", 220 sc->num_of_pages_in_last_blk, idx); 221 } 222 223 return 0; 224 } 225 226 static int 227 iwm_alloc_fw_paging_mem(struct iwm_softc *sc, const struct iwm_fw_sects *image) 228 { 229 int blk_idx = 0; 230 int error, num_of_pages; 231 232 if (sc->fw_paging_db[0].fw_paging_block.vaddr != NULL) { 233 int i; 234 /* Device got reset, and we setup firmware paging again */ 235 for (i = 0; i < sc->num_of_paging_blk + 1; i++) { 236 bus_dmamap_sync(sc->sc_dmat, 237 sc->fw_paging_db[i].fw_paging_block.map, 238 BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD); 239 } 240 return 0; 241 } 242 243 /* ensure IWM_BLOCK_2_EXP_SIZE is power of 2 of IWM_PAGING_BLOCK_SIZE */ 244 _Static_assert((1 << IWM_BLOCK_2_EXP_SIZE) == IWM_PAGING_BLOCK_SIZE, 245 "IWM_BLOCK_2_EXP_SIZE must be power of 2 of IWM_PAGING_BLOCK_SIZE"); 246 247 num_of_pages = image->paging_mem_size / IWM_FW_PAGING_SIZE; 248 sc->num_of_paging_blk = ((num_of_pages - 1) / 249 IWM_NUM_OF_PAGE_PER_GROUP) + 1; 250 251 sc->num_of_pages_in_last_blk = 252 num_of_pages - 253 IWM_NUM_OF_PAGE_PER_GROUP * (sc->num_of_paging_blk - 1); 254 255 IWM_DPRINTF(sc, IWM_DEBUG_FW, 256 "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n", 257 sc->num_of_paging_blk, 258 sc->num_of_pages_in_last_blk); 259 260 /* allocate block of 4Kbytes for paging CSS */ 261 error = iwm_dma_contig_alloc(sc->sc_dmat, 262 &sc->fw_paging_db[blk_idx].fw_paging_block, IWM_FW_PAGING_SIZE, 263 4096); 264 if (error) { 265 /* free all the previous pages since we failed */ 266 iwm_free_fw_paging(sc); 267 return ENOMEM; 268 } 269 270 sc->fw_paging_db[blk_idx].fw_paging_size = IWM_FW_PAGING_SIZE; 271 272 IWM_DPRINTF(sc, IWM_DEBUG_FW, 273 "Paging: allocated 4K(CSS) bytes for firmware paging.\n"); 274 275 /* 276 * allocate blocks in dram. 277 * since that CSS allocated in fw_paging_db[0] loop start from index 1 278 */ 279 for (blk_idx = 1; blk_idx < sc->num_of_paging_blk + 1; blk_idx++) { 280 /* allocate block of IWM_PAGING_BLOCK_SIZE (32K) */ 281 /* XXX Use iwm_dma_contig_alloc for allocating */ 282 error = iwm_dma_contig_alloc(sc->sc_dmat, 283 &sc->fw_paging_db[blk_idx].fw_paging_block, 284 IWM_PAGING_BLOCK_SIZE, 4096); 285 if (error) { 286 /* free all the previous pages since we failed */ 287 iwm_free_fw_paging(sc); 288 return ENOMEM; 289 } 290 291 sc->fw_paging_db[blk_idx].fw_paging_size = IWM_PAGING_BLOCK_SIZE; 292 293 IWM_DPRINTF(sc, IWM_DEBUG_FW, 294 "Paging: allocated 32K bytes for firmware paging.\n"); 295 } 296 297 return 0; 298 } 299 300 int 301 iwm_save_fw_paging(struct iwm_softc *sc, const struct iwm_fw_sects *fw) 302 { 303 int ret; 304 305 ret = iwm_alloc_fw_paging_mem(sc, fw); 306 if (ret) 307 return ret; 308 309 return iwm_fill_paging_mem(sc, fw); 310 } 311 312 /* send paging cmd to FW in case CPU2 has paging image */ 313 int 314 iwm_send_paging_cmd(struct iwm_softc *sc, const struct iwm_fw_sects *fw) 315 { 316 int blk_idx; 317 uint32_t dev_phy_addr; 318 struct iwm_fw_paging_cmd fw_paging_cmd = { 319 .flags = 320 htole32(IWM_PAGING_CMD_IS_SECURED | 321 IWM_PAGING_CMD_IS_ENABLED | 322 (sc->num_of_pages_in_last_blk << 323 IWM_PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)), 324 .block_size = htole32(IWM_BLOCK_2_EXP_SIZE), 325 .block_num = htole32(sc->num_of_paging_blk), 326 }; 327 328 /* loop for for all paging blocks + CSS block */ 329 for (blk_idx = 0; blk_idx < sc->num_of_paging_blk + 1; blk_idx++) { 330 dev_phy_addr = htole32( 331 sc->fw_paging_db[blk_idx].fw_paging_block.paddr >> 332 IWM_PAGE_2_EXP_SIZE); 333 fw_paging_cmd.device_phy_addr[blk_idx] = dev_phy_addr; 334 bus_dmamap_sync(sc->sc_dmat, 335 sc->fw_paging_db[blk_idx].fw_paging_block.map, 336 BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); 337 } 338 339 return iwm_mvm_send_cmd_pdu(sc, iwm_cmd_id(IWM_FW_PAGING_BLOCK_CMD, 340 IWM_ALWAYS_LONG_GROUP, 0), 341 0, sizeof(fw_paging_cmd), &fw_paging_cmd); 342 } 343