1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2019 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 dma_sync_single_for_device(fwrt->trans->dev, 156 fwrt->fw_paging_db[0].fw_paging_phys, 157 fwrt->fw_paging_db[0].fw_paging_size, 158 DMA_BIDIRECTIONAL); 159 160 IWL_DEBUG_FW(fwrt, 161 "Paging: copied %d CSS bytes to first block\n", 162 fwrt->fw_paging_db[0].fw_paging_size); 163 164 sec_idx++; 165 166 /* 167 * Copy the paging blocks to the dram. The loop index starts 168 * from 1 since the CSS block (index 0) was already copied to 169 * dram. We use num_of_paging_blk + 1 to account for that. 170 */ 171 for (idx = 1; idx < fwrt->num_of_paging_blk + 1; idx++) { 172 struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx]; 173 int remaining = image->sec[sec_idx].len - offset; 174 int len = block->fw_paging_size; 175 176 /* 177 * For the last block, we copy all that is remaining, 178 * for all other blocks, we copy fw_paging_size at a 179 * time. */ 180 if (idx == fwrt->num_of_paging_blk) { 181 len = remaining; 182 if (remaining != 183 fwrt->num_of_pages_in_last_blk * FW_PAGING_SIZE) { 184 IWL_ERR(fwrt, 185 "Paging: last block contains more data than expected %d\n", 186 remaining); 187 ret = -EINVAL; 188 goto err; 189 } 190 } else if (block->fw_paging_size > remaining) { 191 IWL_ERR(fwrt, 192 "Paging: not enough data in other in block %d (%d)\n", 193 idx, remaining); 194 ret = -EINVAL; 195 goto err; 196 } 197 198 memcpy(page_address(block->fw_paging_block), 199 image->sec[sec_idx].data + offset, len); 200 dma_sync_single_for_device(fwrt->trans->dev, 201 block->fw_paging_phys, 202 block->fw_paging_size, 203 DMA_BIDIRECTIONAL); 204 205 IWL_DEBUG_FW(fwrt, 206 "Paging: copied %d paging bytes to block %d\n", 207 len, idx); 208 209 offset += block->fw_paging_size; 210 } 211 212 return 0; 213 214 err: 215 iwl_free_fw_paging(fwrt); 216 return ret; 217 } 218 219 static int iwl_save_fw_paging(struct iwl_fw_runtime *fwrt, 220 const struct fw_img *fw) 221 { 222 int ret; 223 224 ret = iwl_alloc_fw_paging_mem(fwrt, fw); 225 if (ret) 226 return ret; 227 228 return iwl_fill_paging_mem(fwrt, fw); 229 } 230 231 /* send paging cmd to FW in case CPU2 has paging image */ 232 static int iwl_send_paging_cmd(struct iwl_fw_runtime *fwrt, 233 const struct fw_img *fw) 234 { 235 struct iwl_fw_paging_cmd paging_cmd = { 236 .flags = cpu_to_le32(PAGING_CMD_IS_SECURED | 237 PAGING_CMD_IS_ENABLED | 238 (fwrt->num_of_pages_in_last_blk << 239 PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)), 240 .block_size = cpu_to_le32(BLOCK_2_EXP_SIZE), 241 .block_num = cpu_to_le32(fwrt->num_of_paging_blk), 242 }; 243 struct iwl_host_cmd hcmd = { 244 .id = iwl_cmd_id(FW_PAGING_BLOCK_CMD, IWL_ALWAYS_LONG_GROUP, 0), 245 .len = { sizeof(paging_cmd), }, 246 .data = { &paging_cmd, }, 247 }; 248 int blk_idx; 249 250 /* loop for for all paging blocks + CSS block */ 251 for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) { 252 dma_addr_t addr = fwrt->fw_paging_db[blk_idx].fw_paging_phys; 253 __le32 phy_addr; 254 255 addr = addr >> PAGE_2_EXP_SIZE; 256 phy_addr = cpu_to_le32(addr); 257 paging_cmd.device_phy_addr[blk_idx] = phy_addr; 258 } 259 260 return iwl_trans_send_cmd(fwrt->trans, &hcmd); 261 } 262 263 int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type) 264 { 265 const struct fw_img *fw = &fwrt->fw->img[type]; 266 int ret; 267 268 if (fwrt->trans->trans_cfg->gen2) 269 return 0; 270 271 /* 272 * Configure and operate fw paging mechanism. 273 * The driver configures the paging flow only once. 274 * The CPU2 paging image is included in the IWL_UCODE_INIT image. 275 */ 276 if (!fw->paging_mem_size) 277 return 0; 278 279 ret = iwl_save_fw_paging(fwrt, fw); 280 if (ret) { 281 IWL_ERR(fwrt, "failed to save the FW paging image\n"); 282 return ret; 283 } 284 285 ret = iwl_send_paging_cmd(fwrt, fw); 286 if (ret) { 287 IWL_ERR(fwrt, "failed to send the paging cmd\n"); 288 iwl_free_fw_paging(fwrt); 289 return ret; 290 } 291 292 return 0; 293 } 294 IWL_EXPORT_SYMBOL(iwl_init_paging); 295