1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2019, 2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include "iwl-drv.h" 8 #include "runtime.h" 9 #include "fw/api/commands.h" 10 11 void iwl_free_fw_paging(struct iwl_fw_runtime *fwrt) 12 { 13 int i; 14 15 if (!fwrt->fw_paging_db[0].fw_paging_block) 16 return; 17 18 for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) { 19 struct iwl_fw_paging *paging = &fwrt->fw_paging_db[i]; 20 21 if (!paging->fw_paging_block) { 22 IWL_DEBUG_FW(fwrt, 23 "Paging: block %d already freed, continue to next page\n", 24 i); 25 26 continue; 27 } 28 dma_unmap_page(fwrt->trans->dev, paging->fw_paging_phys, 29 paging->fw_paging_size, DMA_BIDIRECTIONAL); 30 31 __free_pages(paging->fw_paging_block, 32 get_order(paging->fw_paging_size)); 33 paging->fw_paging_block = NULL; 34 } 35 36 memset(fwrt->fw_paging_db, 0, sizeof(fwrt->fw_paging_db)); 37 } 38 IWL_EXPORT_SYMBOL(iwl_free_fw_paging); 39 40 static int iwl_alloc_fw_paging_mem(struct iwl_fw_runtime *fwrt, 41 const struct fw_img *image) 42 { 43 struct page *block; 44 dma_addr_t phys = 0; 45 int blk_idx, order, num_of_pages, size; 46 47 if (fwrt->fw_paging_db[0].fw_paging_block) 48 return 0; 49 50 /* ensure BLOCK_2_EXP_SIZE is power of 2 of PAGING_BLOCK_SIZE */ 51 BUILD_BUG_ON(BIT(BLOCK_2_EXP_SIZE) != PAGING_BLOCK_SIZE); 52 53 num_of_pages = image->paging_mem_size / FW_PAGING_SIZE; 54 fwrt->num_of_paging_blk = 55 DIV_ROUND_UP(num_of_pages, NUM_OF_PAGE_PER_GROUP); 56 fwrt->num_of_pages_in_last_blk = 57 num_of_pages - 58 NUM_OF_PAGE_PER_GROUP * (fwrt->num_of_paging_blk - 1); 59 60 IWL_DEBUG_FW(fwrt, 61 "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n", 62 fwrt->num_of_paging_blk, 63 fwrt->num_of_pages_in_last_blk); 64 65 /* 66 * Allocate CSS and paging blocks in dram. 67 */ 68 for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) { 69 /* For CSS allocate 4KB, for others PAGING_BLOCK_SIZE (32K) */ 70 size = blk_idx ? PAGING_BLOCK_SIZE : FW_PAGING_SIZE; 71 order = get_order(size); 72 block = alloc_pages(GFP_KERNEL, order); 73 if (!block) { 74 /* free all the previous pages since we failed */ 75 iwl_free_fw_paging(fwrt); 76 return -ENOMEM; 77 } 78 79 fwrt->fw_paging_db[blk_idx].fw_paging_block = block; 80 fwrt->fw_paging_db[blk_idx].fw_paging_size = size; 81 82 phys = dma_map_page(fwrt->trans->dev, block, 0, 83 PAGE_SIZE << order, 84 DMA_BIDIRECTIONAL); 85 if (dma_mapping_error(fwrt->trans->dev, phys)) { 86 /* 87 * free the previous pages and the current one 88 * since we failed to map_page. 89 */ 90 iwl_free_fw_paging(fwrt); 91 return -ENOMEM; 92 } 93 fwrt->fw_paging_db[blk_idx].fw_paging_phys = phys; 94 95 if (!blk_idx) 96 IWL_DEBUG_FW(fwrt, 97 "Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n", 98 order); 99 else 100 IWL_DEBUG_FW(fwrt, 101 "Paging: allocated 32K bytes (order %d) for firmware paging.\n", 102 order); 103 } 104 105 return 0; 106 } 107 108 static int iwl_fill_paging_mem(struct iwl_fw_runtime *fwrt, 109 const struct fw_img *image) 110 { 111 int sec_idx, idx, ret; 112 u32 offset = 0; 113 114 /* 115 * find where is the paging image start point: 116 * if CPU2 exist and it's in paging format, then the image looks like: 117 * CPU1 sections (2 or more) 118 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2 119 * CPU2 sections (not paged) 120 * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2 121 * non paged to CPU2 paging sec 122 * CPU2 paging CSS 123 * CPU2 paging image (including instruction and data) 124 */ 125 for (sec_idx = 0; sec_idx < image->num_sec; sec_idx++) { 126 if (image->sec[sec_idx].offset == PAGING_SEPARATOR_SECTION) { 127 sec_idx++; 128 break; 129 } 130 } 131 132 /* 133 * If paging is enabled there should be at least 2 more sections left 134 * (one for CSS and one for Paging data) 135 */ 136 if (sec_idx >= image->num_sec - 1) { 137 IWL_ERR(fwrt, "Paging: Missing CSS and/or paging sections\n"); 138 ret = -EINVAL; 139 goto err; 140 } 141 142 /* copy the CSS block to the dram */ 143 IWL_DEBUG_FW(fwrt, "Paging: load paging CSS to FW, sec = %d\n", 144 sec_idx); 145 146 if (image->sec[sec_idx].len > fwrt->fw_paging_db[0].fw_paging_size) { 147 IWL_ERR(fwrt, "CSS block is larger than paging size\n"); 148 ret = -EINVAL; 149 goto err; 150 } 151 152 memcpy(page_address(fwrt->fw_paging_db[0].fw_paging_block), 153 image->sec[sec_idx].data, 154 image->sec[sec_idx].len); 155 fwrt->fw_paging_db[0].fw_offs = image->sec[sec_idx].offset; 156 dma_sync_single_for_device(fwrt->trans->dev, 157 fwrt->fw_paging_db[0].fw_paging_phys, 158 fwrt->fw_paging_db[0].fw_paging_size, 159 DMA_BIDIRECTIONAL); 160 161 IWL_DEBUG_FW(fwrt, 162 "Paging: copied %d CSS bytes to first block\n", 163 fwrt->fw_paging_db[0].fw_paging_size); 164 165 sec_idx++; 166 167 /* 168 * Copy the paging blocks to the dram. The loop index starts 169 * from 1 since the CSS block (index 0) was already copied to 170 * dram. We use num_of_paging_blk + 1 to account for that. 171 */ 172 for (idx = 1; idx < fwrt->num_of_paging_blk + 1; idx++) { 173 struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx]; 174 int remaining = image->sec[sec_idx].len - offset; 175 int len = block->fw_paging_size; 176 177 /* 178 * For the last block, we copy all that is remaining, 179 * for all other blocks, we copy fw_paging_size at a 180 * time. */ 181 if (idx == fwrt->num_of_paging_blk) { 182 len = remaining; 183 if (remaining != 184 fwrt->num_of_pages_in_last_blk * FW_PAGING_SIZE) { 185 IWL_ERR(fwrt, 186 "Paging: last block contains more data than expected %d\n", 187 remaining); 188 ret = -EINVAL; 189 goto err; 190 } 191 } else if (block->fw_paging_size > remaining) { 192 IWL_ERR(fwrt, 193 "Paging: not enough data in other in block %d (%d)\n", 194 idx, remaining); 195 ret = -EINVAL; 196 goto err; 197 } 198 199 memcpy(page_address(block->fw_paging_block), 200 image->sec[sec_idx].data + offset, len); 201 block->fw_offs = image->sec[sec_idx].offset + offset; 202 dma_sync_single_for_device(fwrt->trans->dev, 203 block->fw_paging_phys, 204 block->fw_paging_size, 205 DMA_BIDIRECTIONAL); 206 207 IWL_DEBUG_FW(fwrt, 208 "Paging: copied %d paging bytes to block %d\n", 209 len, idx); 210 211 offset += block->fw_paging_size; 212 } 213 214 return 0; 215 216 err: 217 iwl_free_fw_paging(fwrt); 218 return ret; 219 } 220 221 static int iwl_save_fw_paging(struct iwl_fw_runtime *fwrt, 222 const struct fw_img *fw) 223 { 224 int ret; 225 226 ret = iwl_alloc_fw_paging_mem(fwrt, fw); 227 if (ret) 228 return ret; 229 230 return iwl_fill_paging_mem(fwrt, fw); 231 } 232 233 /* send paging cmd to FW in case CPU2 has paging image */ 234 static int iwl_send_paging_cmd(struct iwl_fw_runtime *fwrt, 235 const struct fw_img *fw) 236 { 237 struct iwl_fw_paging_cmd paging_cmd = { 238 .flags = cpu_to_le32(PAGING_CMD_IS_SECURED | 239 PAGING_CMD_IS_ENABLED | 240 (fwrt->num_of_pages_in_last_blk << 241 PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)), 242 .block_size = cpu_to_le32(BLOCK_2_EXP_SIZE), 243 .block_num = cpu_to_le32(fwrt->num_of_paging_blk), 244 }; 245 struct iwl_host_cmd hcmd = { 246 .id = iwl_cmd_id(FW_PAGING_BLOCK_CMD, IWL_ALWAYS_LONG_GROUP, 0), 247 .len = { sizeof(paging_cmd), }, 248 .data = { &paging_cmd, }, 249 }; 250 int blk_idx; 251 252 /* loop for for all paging blocks + CSS block */ 253 for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) { 254 dma_addr_t addr = fwrt->fw_paging_db[blk_idx].fw_paging_phys; 255 __le32 phy_addr; 256 257 addr = addr >> PAGE_2_EXP_SIZE; 258 phy_addr = cpu_to_le32(addr); 259 paging_cmd.device_phy_addr[blk_idx] = phy_addr; 260 } 261 262 return iwl_trans_send_cmd(fwrt->trans, &hcmd); 263 } 264 265 int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type) 266 { 267 const struct fw_img *fw = &fwrt->fw->img[type]; 268 int ret; 269 270 if (fwrt->trans->trans_cfg->gen2) 271 return 0; 272 273 /* 274 * Configure and operate fw paging mechanism. 275 * The driver configures the paging flow only once. 276 * The CPU2 paging image is included in the IWL_UCODE_INIT image. 277 */ 278 if (!fw->paging_mem_size) 279 return 0; 280 281 ret = iwl_save_fw_paging(fwrt, fw); 282 if (ret) { 283 IWL_ERR(fwrt, "failed to save the FW paging image\n"); 284 return ret; 285 } 286 287 ret = iwl_send_paging_cmd(fwrt, fw); 288 if (ret) { 289 IWL_ERR(fwrt, "failed to send the paging cmd\n"); 290 iwl_free_fw_paging(fwrt); 291 return ret; 292 } 293 294 return 0; 295 } 296 IWL_EXPORT_SYMBOL(iwl_init_paging); 297