1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include "iwl-drv.h" 63 #include "runtime.h" 64 #include "fw/api/commands.h" 65 66 void iwl_free_fw_paging(struct iwl_fw_runtime *fwrt) 67 { 68 int i; 69 70 if (!fwrt->fw_paging_db[0].fw_paging_block) 71 return; 72 73 for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) { 74 struct iwl_fw_paging *paging = &fwrt->fw_paging_db[i]; 75 76 if (!paging->fw_paging_block) { 77 IWL_DEBUG_FW(fwrt, 78 "Paging: block %d already freed, continue to next page\n", 79 i); 80 81 continue; 82 } 83 dma_unmap_page(fwrt->trans->dev, paging->fw_paging_phys, 84 paging->fw_paging_size, DMA_BIDIRECTIONAL); 85 86 __free_pages(paging->fw_paging_block, 87 get_order(paging->fw_paging_size)); 88 paging->fw_paging_block = NULL; 89 } 90 91 memset(fwrt->fw_paging_db, 0, sizeof(fwrt->fw_paging_db)); 92 } 93 IWL_EXPORT_SYMBOL(iwl_free_fw_paging); 94 95 static int iwl_alloc_fw_paging_mem(struct iwl_fw_runtime *fwrt, 96 const struct fw_img *image) 97 { 98 struct page *block; 99 dma_addr_t phys = 0; 100 int blk_idx, order, num_of_pages, size; 101 102 if (fwrt->fw_paging_db[0].fw_paging_block) 103 return 0; 104 105 /* ensure BLOCK_2_EXP_SIZE is power of 2 of PAGING_BLOCK_SIZE */ 106 BUILD_BUG_ON(BIT(BLOCK_2_EXP_SIZE) != PAGING_BLOCK_SIZE); 107 108 num_of_pages = image->paging_mem_size / FW_PAGING_SIZE; 109 fwrt->num_of_paging_blk = 110 DIV_ROUND_UP(num_of_pages, NUM_OF_PAGE_PER_GROUP); 111 fwrt->num_of_pages_in_last_blk = 112 num_of_pages - 113 NUM_OF_PAGE_PER_GROUP * (fwrt->num_of_paging_blk - 1); 114 115 IWL_DEBUG_FW(fwrt, 116 "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n", 117 fwrt->num_of_paging_blk, 118 fwrt->num_of_pages_in_last_blk); 119 120 /* 121 * Allocate CSS and paging blocks in dram. 122 */ 123 for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) { 124 /* For CSS allocate 4KB, for others PAGING_BLOCK_SIZE (32K) */ 125 size = blk_idx ? PAGING_BLOCK_SIZE : FW_PAGING_SIZE; 126 order = get_order(size); 127 block = alloc_pages(GFP_KERNEL, order); 128 if (!block) { 129 /* free all the previous pages since we failed */ 130 iwl_free_fw_paging(fwrt); 131 return -ENOMEM; 132 } 133 134 fwrt->fw_paging_db[blk_idx].fw_paging_block = block; 135 fwrt->fw_paging_db[blk_idx].fw_paging_size = size; 136 137 phys = dma_map_page(fwrt->trans->dev, block, 0, 138 PAGE_SIZE << order, 139 DMA_BIDIRECTIONAL); 140 if (dma_mapping_error(fwrt->trans->dev, phys)) { 141 /* 142 * free the previous pages and the current one 143 * since we failed to map_page. 144 */ 145 iwl_free_fw_paging(fwrt); 146 return -ENOMEM; 147 } 148 fwrt->fw_paging_db[blk_idx].fw_paging_phys = phys; 149 150 if (!blk_idx) 151 IWL_DEBUG_FW(fwrt, 152 "Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n", 153 order); 154 else 155 IWL_DEBUG_FW(fwrt, 156 "Paging: allocated 32K bytes (order %d) for firmware paging.\n", 157 order); 158 } 159 160 return 0; 161 } 162 163 static int iwl_fill_paging_mem(struct iwl_fw_runtime *fwrt, 164 const struct fw_img *image) 165 { 166 int sec_idx, idx; 167 u32 offset = 0; 168 169 /* 170 * find where is the paging image start point: 171 * if CPU2 exist and it's in paging format, then the image looks like: 172 * CPU1 sections (2 or more) 173 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2 174 * CPU2 sections (not paged) 175 * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2 176 * non paged to CPU2 paging sec 177 * CPU2 paging CSS 178 * CPU2 paging image (including instruction and data) 179 */ 180 for (sec_idx = 0; sec_idx < image->num_sec; sec_idx++) { 181 if (image->sec[sec_idx].offset == PAGING_SEPARATOR_SECTION) { 182 sec_idx++; 183 break; 184 } 185 } 186 187 /* 188 * If paging is enabled there should be at least 2 more sections left 189 * (one for CSS and one for Paging data) 190 */ 191 if (sec_idx >= image->num_sec - 1) { 192 IWL_ERR(fwrt, "Paging: Missing CSS and/or paging sections\n"); 193 iwl_free_fw_paging(fwrt); 194 return -EINVAL; 195 } 196 197 /* copy the CSS block to the dram */ 198 IWL_DEBUG_FW(fwrt, "Paging: load paging CSS to FW, sec = %d\n", 199 sec_idx); 200 201 memcpy(page_address(fwrt->fw_paging_db[0].fw_paging_block), 202 image->sec[sec_idx].data, 203 fwrt->fw_paging_db[0].fw_paging_size); 204 dma_sync_single_for_device(fwrt->trans->dev, 205 fwrt->fw_paging_db[0].fw_paging_phys, 206 fwrt->fw_paging_db[0].fw_paging_size, 207 DMA_BIDIRECTIONAL); 208 209 IWL_DEBUG_FW(fwrt, 210 "Paging: copied %d CSS bytes to first block\n", 211 fwrt->fw_paging_db[0].fw_paging_size); 212 213 sec_idx++; 214 215 /* 216 * copy the paging blocks to the dram 217 * loop index start from 1 since that CSS block already copied to dram 218 * and CSS index is 0. 219 * loop stop at num_of_paging_blk since that last block is not full. 220 */ 221 for (idx = 1; idx < fwrt->num_of_paging_blk; idx++) { 222 struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx]; 223 224 memcpy(page_address(block->fw_paging_block), 225 image->sec[sec_idx].data + offset, 226 block->fw_paging_size); 227 dma_sync_single_for_device(fwrt->trans->dev, 228 block->fw_paging_phys, 229 block->fw_paging_size, 230 DMA_BIDIRECTIONAL); 231 232 IWL_DEBUG_FW(fwrt, 233 "Paging: copied %d paging bytes to block %d\n", 234 fwrt->fw_paging_db[idx].fw_paging_size, 235 idx); 236 237 offset += fwrt->fw_paging_db[idx].fw_paging_size; 238 } 239 240 /* copy the last paging block */ 241 if (fwrt->num_of_pages_in_last_blk > 0) { 242 struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx]; 243 244 memcpy(page_address(block->fw_paging_block), 245 image->sec[sec_idx].data + offset, 246 FW_PAGING_SIZE * fwrt->num_of_pages_in_last_blk); 247 dma_sync_single_for_device(fwrt->trans->dev, 248 block->fw_paging_phys, 249 block->fw_paging_size, 250 DMA_BIDIRECTIONAL); 251 252 IWL_DEBUG_FW(fwrt, 253 "Paging: copied %d pages in the last block %d\n", 254 fwrt->num_of_pages_in_last_blk, idx); 255 } 256 257 return 0; 258 } 259 260 static int iwl_save_fw_paging(struct iwl_fw_runtime *fwrt, 261 const struct fw_img *fw) 262 { 263 int ret; 264 265 ret = iwl_alloc_fw_paging_mem(fwrt, fw); 266 if (ret) 267 return ret; 268 269 return iwl_fill_paging_mem(fwrt, fw); 270 } 271 272 /* send paging cmd to FW in case CPU2 has paging image */ 273 static int iwl_send_paging_cmd(struct iwl_fw_runtime *fwrt, 274 const struct fw_img *fw) 275 { 276 struct iwl_fw_paging_cmd paging_cmd = { 277 .flags = cpu_to_le32(PAGING_CMD_IS_SECURED | 278 PAGING_CMD_IS_ENABLED | 279 (fwrt->num_of_pages_in_last_blk << 280 PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)), 281 .block_size = cpu_to_le32(BLOCK_2_EXP_SIZE), 282 .block_num = cpu_to_le32(fwrt->num_of_paging_blk), 283 }; 284 struct iwl_host_cmd hcmd = { 285 .id = iwl_cmd_id(FW_PAGING_BLOCK_CMD, IWL_ALWAYS_LONG_GROUP, 0), 286 .len = { sizeof(paging_cmd), }, 287 .data = { &paging_cmd, }, 288 }; 289 int blk_idx; 290 291 /* loop for for all paging blocks + CSS block */ 292 for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) { 293 dma_addr_t addr = fwrt->fw_paging_db[blk_idx].fw_paging_phys; 294 __le32 phy_addr; 295 296 addr = addr >> PAGE_2_EXP_SIZE; 297 phy_addr = cpu_to_le32(addr); 298 paging_cmd.device_phy_addr[blk_idx] = phy_addr; 299 } 300 301 return iwl_trans_send_cmd(fwrt->trans, &hcmd); 302 } 303 304 int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type) 305 { 306 const struct fw_img *fw = &fwrt->fw->img[type]; 307 int ret; 308 309 if (fwrt->trans->cfg->gen2) 310 return 0; 311 312 /* 313 * Configure and operate fw paging mechanism. 314 * The driver configures the paging flow only once. 315 * The CPU2 paging image is included in the IWL_UCODE_INIT image. 316 */ 317 if (!fw->paging_mem_size) 318 return 0; 319 320 ret = iwl_save_fw_paging(fwrt, fw); 321 if (ret) { 322 IWL_ERR(fwrt, "failed to save the FW paging image\n"); 323 return ret; 324 } 325 326 ret = iwl_send_paging_cmd(fwrt, fw); 327 if (ret) { 328 IWL_ERR(fwrt, "failed to send the paging cmd\n"); 329 iwl_free_fw_paging(fwrt); 330 return ret; 331 } 332 333 return 0; 334 } 335 IWL_EXPORT_SYMBOL(iwl_init_paging); 336