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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright (C) 2012-2014, 2018-2019, 2021 Intel Corporation4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH5 * Copyright (C) 2016-2017 Intel Deutschland GmbH6 */7#include "iwl-drv.h"8#include "runtime.h"9#include "fw/api/commands.h"10 11void 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}38IWL_EXPORT_SYMBOL(iwl_free_fw_paging);39 40static 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 one88 * 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 else100 IWL_DEBUG_FW(fwrt,101 "Paging: allocated 32K bytes (order %d) for firmware paging.\n",102 order);103 }104 105 return 0;106}107 108static 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 CPU2119 * CPU2 sections (not paged)120 * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2121 * non paged to CPU2 paging sec122 * CPU2 paging CSS123 * 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 left134 * (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 starts169 * from 1 since the CSS block (index 0) was already copied to170 * 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 a180 * 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 (const u8 *)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 216err:217 iwl_free_fw_paging(fwrt);218 return ret;219}220 221static 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 */234static 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 = WIDE_ID(IWL_ALWAYS_LONG_GROUP, FW_PAGING_BLOCK_CMD),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 265int 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}296IWL_EXPORT_SYMBOL(iwl_init_paging);297