ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/soc/qcom/mdt_loader.c b/marvell/linux/drivers/soc/qcom/mdt_loader.c
new file mode 100644
index 0000000..6034cd8
--- /dev/null
+++ b/marvell/linux/drivers/soc/qcom/mdt_loader.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Qualcomm Peripheral Image Loader
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2015 Sony Mobile Communications Inc
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/device.h>
+#include <linux/elf.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/qcom_scm.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/soc/qcom/mdt_loader.h>
+
+static bool mdt_phdr_valid(const struct elf32_phdr *phdr)
+{
+ if (phdr->p_type != PT_LOAD)
+ return false;
+
+ if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
+ return false;
+
+ if (!phdr->p_memsz)
+ return false;
+
+ return true;
+}
+
+/**
+ * qcom_mdt_get_size() - acquire size of the memory region needed to load mdt
+ * @fw: firmware object for the mdt file
+ *
+ * Returns size of the loaded firmware blob, or -EINVAL on failure.
+ */
+ssize_t qcom_mdt_get_size(const struct firmware *fw)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_phdr *phdr;
+ const struct elf32_hdr *ehdr;
+ phys_addr_t min_addr = PHYS_ADDR_MAX;
+ phys_addr_t max_addr = 0;
+ int i;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = &phdrs[i];
+
+ if (!mdt_phdr_valid(phdr))
+ continue;
+
+ if (phdr->p_paddr < min_addr)
+ min_addr = phdr->p_paddr;
+
+ if (phdr->p_paddr + phdr->p_memsz > max_addr)
+ max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
+ }
+
+ return min_addr < max_addr ? max_addr - min_addr : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
+
+/**
+ * qcom_mdt_read_metadata() - read header and metadata from mdt or mbn
+ * @fw: firmware of mdt header or mbn
+ * @data_len: length of the read metadata blob
+ *
+ * The mechanism that performs the authentication of the loading firmware
+ * expects an ELF header directly followed by the segment of hashes, with no
+ * padding inbetween. This function allocates a chunk of memory for this pair
+ * and copy the two pieces into the buffer.
+ *
+ * In the case of split firmware the hash is found directly following the ELF
+ * header, rather than at p_offset described by the second program header.
+ *
+ * The caller is responsible to free (kfree()) the returned pointer.
+ *
+ * Return: pointer to data, or ERR_PTR()
+ */
+void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_hdr *ehdr;
+ size_t hash_offset;
+ size_t hash_size;
+ size_t ehdr_size;
+ void *data;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ if (ehdr->e_phnum < 2)
+ return ERR_PTR(-EINVAL);
+
+ if (phdrs[0].p_type == PT_LOAD)
+ return ERR_PTR(-EINVAL);
+
+ if ((phdrs[1].p_flags & QCOM_MDT_TYPE_MASK) != QCOM_MDT_TYPE_HASH)
+ return ERR_PTR(-EINVAL);
+
+ ehdr_size = phdrs[0].p_filesz;
+ hash_size = phdrs[1].p_filesz;
+
+ data = kmalloc(ehdr_size + hash_size, GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ /* Is the header and hash already packed */
+ if (ehdr_size + hash_size == fw->size)
+ hash_offset = phdrs[0].p_filesz;
+ else
+ hash_offset = phdrs[1].p_offset;
+
+ memcpy(data, fw->data, ehdr_size);
+ memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
+
+ *data_len = ehdr_size + hash_size;
+
+ return data;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
+
+static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
+ const char *firmware, int pas_id, void *mem_region,
+ phys_addr_t mem_phys, size_t mem_size,
+ phys_addr_t *reloc_base, bool pas_init)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_phdr *phdr;
+ const struct elf32_hdr *ehdr;
+ const struct firmware *seg_fw;
+ phys_addr_t mem_reloc;
+ phys_addr_t min_addr = PHYS_ADDR_MAX;
+ phys_addr_t max_addr = 0;
+ size_t metadata_len;
+ size_t fw_name_len;
+ ssize_t offset;
+ void *metadata;
+ char *fw_name;
+ bool relocate = false;
+ void *ptr;
+ int ret = 0;
+ int i;
+
+ if (!fw || !mem_region || !mem_phys || !mem_size)
+ return -EINVAL;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ fw_name_len = strlen(firmware);
+ if (fw_name_len <= 4)
+ return -EINVAL;
+
+ fw_name = kstrdup(firmware, GFP_KERNEL);
+ if (!fw_name)
+ return -ENOMEM;
+
+ if (pas_init) {
+ metadata = qcom_mdt_read_metadata(fw, &metadata_len);
+ if (IS_ERR(metadata)) {
+ ret = PTR_ERR(metadata);
+ goto out;
+ }
+
+ ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len);
+
+ kfree(metadata);
+ if (ret) {
+ dev_err(dev, "invalid firmware metadata\n");
+ goto out;
+ }
+ }
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = &phdrs[i];
+
+ if (!mdt_phdr_valid(phdr))
+ continue;
+
+ if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
+ relocate = true;
+
+ if (phdr->p_paddr < min_addr)
+ min_addr = phdr->p_paddr;
+
+ if (phdr->p_paddr + phdr->p_memsz > max_addr)
+ max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
+ }
+
+ if (relocate) {
+ if (pas_init) {
+ ret = qcom_scm_pas_mem_setup(pas_id, mem_phys,
+ max_addr - min_addr);
+ if (ret) {
+ dev_err(dev, "unable to setup relocation\n");
+ goto out;
+ }
+ }
+
+ /*
+ * The image is relocatable, so offset each segment based on
+ * the lowest segment address.
+ */
+ mem_reloc = min_addr;
+ } else {
+ /*
+ * Image is not relocatable, so offset each segment based on
+ * the allocated physical chunk of memory.
+ */
+ mem_reloc = mem_phys;
+ }
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = &phdrs[i];
+
+ if (!mdt_phdr_valid(phdr))
+ continue;
+
+ offset = phdr->p_paddr - mem_reloc;
+ if (offset < 0 || offset + phdr->p_memsz > mem_size) {
+ dev_err(dev, "segment outside memory range\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ if (phdr->p_filesz > phdr->p_memsz) {
+ dev_err(dev,
+ "refusing to load segment %d with p_filesz > p_memsz\n",
+ i);
+ ret = -EINVAL;
+ break;
+ }
+
+ ptr = mem_region + offset;
+
+ if (phdr->p_filesz && phdr->p_offset < fw->size) {
+ /* Firmware is large enough to be non-split */
+ if (phdr->p_offset + phdr->p_filesz > fw->size) {
+ dev_err(dev,
+ "failed to load segment %d from truncated file %s\n",
+ i, firmware);
+ ret = -EINVAL;
+ break;
+ }
+
+ memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz);
+ } else if (phdr->p_filesz) {
+ /* Firmware not large enough, load split-out segments */
+ sprintf(fw_name + fw_name_len - 3, "b%02d", i);
+ ret = request_firmware_into_buf(&seg_fw, fw_name, dev,
+ ptr, phdr->p_filesz);
+ if (ret) {
+ dev_err(dev, "failed to load %s\n", fw_name);
+ break;
+ }
+
+ if (seg_fw->size != phdr->p_filesz) {
+ dev_err(dev,
+ "failed to load segment %d from truncated file %s\n",
+ i, fw_name);
+ release_firmware(seg_fw);
+ ret = -EINVAL;
+ break;
+ }
+
+ release_firmware(seg_fw);
+ }
+
+ if (phdr->p_memsz > phdr->p_filesz)
+ memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
+ }
+
+ if (reloc_base)
+ *reloc_base = mem_reloc;
+
+out:
+ kfree(fw_name);
+
+ return ret;
+}
+
+/**
+ * qcom_mdt_load() - load the firmware which header is loaded as fw
+ * @dev: device handle to associate resources with
+ * @fw: firmware object for the mdt file
+ * @firmware: name of the firmware, for construction of segment file names
+ * @pas_id: PAS identifier
+ * @mem_region: allocated memory region to load firmware into
+ * @mem_phys: physical address of allocated memory region
+ * @mem_size: size of the allocated memory region
+ * @reloc_base: adjusted physical address after relocation
+ *
+ * Returns 0 on success, negative errno otherwise.
+ */
+int qcom_mdt_load(struct device *dev, const struct firmware *fw,
+ const char *firmware, int pas_id, void *mem_region,
+ phys_addr_t mem_phys, size_t mem_size,
+ phys_addr_t *reloc_base)
+{
+ return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
+ mem_size, reloc_base, true);
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_load);
+
+/**
+ * qcom_mdt_load_no_init() - load the firmware which header is loaded as fw
+ * @dev: device handle to associate resources with
+ * @fw: firmware object for the mdt file
+ * @firmware: name of the firmware, for construction of segment file names
+ * @pas_id: PAS identifier
+ * @mem_region: allocated memory region to load firmware into
+ * @mem_phys: physical address of allocated memory region
+ * @mem_size: size of the allocated memory region
+ * @reloc_base: adjusted physical address after relocation
+ *
+ * Returns 0 on success, negative errno otherwise.
+ */
+int qcom_mdt_load_no_init(struct device *dev, const struct firmware *fw,
+ const char *firmware, int pas_id,
+ void *mem_region, phys_addr_t mem_phys,
+ size_t mem_size, phys_addr_t *reloc_base)
+{
+ return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
+ mem_size, reloc_base, false);
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_load_no_init);
+
+MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
+MODULE_LICENSE("GPL v2");