0e622e8019
qcom_mdt_load function loads the mdt type firmware and initialises the secure memory as well. Make the initialisation only when requested by the caller, so that the function can be used by self-authenticating remoteproc as well. Acked-by: Andy Gross <andy.gross@linaro.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
246 lines
6.4 KiB
C
246 lines
6.4 KiB
C
/*
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* Qualcomm Peripheral Image Loader
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*
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* Copyright (C) 2016 Linaro Ltd
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* Copyright (C) 2015 Sony Mobile Communications Inc
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/device.h>
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#include <linux/elf.h>
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#include <linux/firmware.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/qcom_scm.h>
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/soc/qcom/mdt_loader.h>
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static bool mdt_phdr_valid(const struct elf32_phdr *phdr)
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{
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if (phdr->p_type != PT_LOAD)
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return false;
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if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
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return false;
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if (!phdr->p_memsz)
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return false;
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return true;
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}
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/**
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* qcom_mdt_get_size() - acquire size of the memory region needed to load mdt
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* @fw: firmware object for the mdt file
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*
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* Returns size of the loaded firmware blob, or -EINVAL on failure.
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*/
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ssize_t qcom_mdt_get_size(const struct firmware *fw)
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{
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const struct elf32_phdr *phdrs;
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const struct elf32_phdr *phdr;
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const struct elf32_hdr *ehdr;
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phys_addr_t min_addr = PHYS_ADDR_MAX;
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phys_addr_t max_addr = 0;
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int i;
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ehdr = (struct elf32_hdr *)fw->data;
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phdrs = (struct elf32_phdr *)(ehdr + 1);
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for (i = 0; i < ehdr->e_phnum; i++) {
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phdr = &phdrs[i];
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if (!mdt_phdr_valid(phdr))
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continue;
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if (phdr->p_paddr < min_addr)
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min_addr = phdr->p_paddr;
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if (phdr->p_paddr + phdr->p_memsz > max_addr)
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max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
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}
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return min_addr < max_addr ? max_addr - min_addr : -EINVAL;
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}
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EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
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static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
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const char *firmware, int pas_id, void *mem_region,
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phys_addr_t mem_phys, size_t mem_size,
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phys_addr_t *reloc_base, bool pas_init)
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{
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const struct elf32_phdr *phdrs;
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const struct elf32_phdr *phdr;
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const struct elf32_hdr *ehdr;
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const struct firmware *seg_fw;
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phys_addr_t mem_reloc;
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phys_addr_t min_addr = PHYS_ADDR_MAX;
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phys_addr_t max_addr = 0;
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size_t fw_name_len;
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ssize_t offset;
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char *fw_name;
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bool relocate = false;
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void *ptr;
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int ret;
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int i;
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if (!fw || !mem_region || !mem_phys || !mem_size)
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return -EINVAL;
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ehdr = (struct elf32_hdr *)fw->data;
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phdrs = (struct elf32_phdr *)(ehdr + 1);
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fw_name_len = strlen(firmware);
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if (fw_name_len <= 4)
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return -EINVAL;
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fw_name = kstrdup(firmware, GFP_KERNEL);
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if (!fw_name)
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return -ENOMEM;
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if (pas_init) {
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ret = qcom_scm_pas_init_image(pas_id, fw->data, fw->size);
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if (ret) {
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dev_err(dev, "invalid firmware metadata\n");
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goto out;
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}
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}
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for (i = 0; i < ehdr->e_phnum; i++) {
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phdr = &phdrs[i];
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if (!mdt_phdr_valid(phdr))
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continue;
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if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
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relocate = true;
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if (phdr->p_paddr < min_addr)
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min_addr = phdr->p_paddr;
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if (phdr->p_paddr + phdr->p_memsz > max_addr)
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max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
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}
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if (relocate) {
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if (pas_init) {
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ret = qcom_scm_pas_mem_setup(pas_id, mem_phys,
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max_addr - min_addr);
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if (ret) {
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dev_err(dev, "unable to setup relocation\n");
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goto out;
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}
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}
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/*
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* The image is relocatable, so offset each segment based on
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* the lowest segment address.
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*/
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mem_reloc = min_addr;
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} else {
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/*
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* Image is not relocatable, so offset each segment based on
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* the allocated physical chunk of memory.
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*/
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mem_reloc = mem_phys;
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}
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for (i = 0; i < ehdr->e_phnum; i++) {
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phdr = &phdrs[i];
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if (!mdt_phdr_valid(phdr))
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continue;
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offset = phdr->p_paddr - mem_reloc;
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if (offset < 0 || offset + phdr->p_memsz > mem_size) {
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dev_err(dev, "segment outside memory range\n");
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ret = -EINVAL;
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break;
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}
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ptr = mem_region + offset;
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if (phdr->p_filesz) {
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sprintf(fw_name + fw_name_len - 3, "b%02d", i);
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ret = request_firmware_into_buf(&seg_fw, fw_name, dev,
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ptr, phdr->p_filesz);
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if (ret) {
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dev_err(dev, "failed to load %s\n", fw_name);
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break;
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}
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release_firmware(seg_fw);
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}
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if (phdr->p_memsz > phdr->p_filesz)
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memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
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}
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if (reloc_base)
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*reloc_base = mem_reloc;
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out:
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kfree(fw_name);
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return ret;
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}
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/**
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* qcom_mdt_load() - load the firmware which header is loaded as fw
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* @dev: device handle to associate resources with
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* @fw: firmware object for the mdt file
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* @firmware: name of the firmware, for construction of segment file names
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* @pas_id: PAS identifier
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* @mem_region: allocated memory region to load firmware into
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* @mem_phys: physical address of allocated memory region
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* @mem_size: size of the allocated memory region
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* @reloc_base: adjusted physical address after relocation
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*
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* Returns 0 on success, negative errno otherwise.
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*/
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int qcom_mdt_load(struct device *dev, const struct firmware *fw,
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const char *firmware, int pas_id, void *mem_region,
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phys_addr_t mem_phys, size_t mem_size,
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phys_addr_t *reloc_base)
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{
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return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
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mem_size, reloc_base, true);
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}
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EXPORT_SYMBOL_GPL(qcom_mdt_load);
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/**
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* qcom_mdt_load_no_init() - load the firmware which header is loaded as fw
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* @dev: device handle to associate resources with
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* @fw: firmware object for the mdt file
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* @firmware: name of the firmware, for construction of segment file names
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* @pas_id: PAS identifier
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* @mem_region: allocated memory region to load firmware into
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* @mem_phys: physical address of allocated memory region
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* @mem_size: size of the allocated memory region
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* @reloc_base: adjusted physical address after relocation
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*
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* Returns 0 on success, negative errno otherwise.
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*/
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int qcom_mdt_load_no_init(struct device *dev, const struct firmware *fw,
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const char *firmware, int pas_id,
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void *mem_region, phys_addr_t mem_phys,
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size_t mem_size, phys_addr_t *reloc_base)
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{
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return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
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mem_size, reloc_base, false);
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}
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EXPORT_SYMBOL_GPL(qcom_mdt_load_no_init);
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MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
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MODULE_LICENSE("GPL v2");
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