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// SPDX-License-Identifier: GPL-2.0-only OR MIT
/* Copyright (c) 2024 Imagination Technologies Ltd. */
#include "pvr_device.h"
#include "pvr_fw.h"
#include <drm/drm_device.h>
#include <drm/drm_print.h>
#include <linux/elf.h>
#include <linux/string.h>
#include <linux/types.h>
/**
* pvr_fw_process_elf_command_stream() - Process ELF firmware image and populate
* firmware sections
* @pvr_dev: Device pointer.
* @fw: Pointer to firmware image.
* @fw_code_ptr: Pointer to FW code section.
* @fw_data_ptr: Pointer to FW data section.
* @fw_core_code_ptr: Pointer to FW coremem code section.
* @fw_core_data_ptr: Pointer to FW coremem data section.
*
* Returns :
* * 0 on success, or
* * -EINVAL on any error in ELF command stream.
*/
int
pvr_fw_process_elf_command_stream(struct pvr_device *pvr_dev, const u8 *fw,
u8 *fw_code_ptr, u8 *fw_data_ptr,
u8 *fw_core_code_ptr, u8 *fw_core_data_ptr)
{
struct elf32_hdr *header = (struct elf32_hdr *)fw;
struct elf32_phdr *program_header = (struct elf32_phdr *)(fw + header->e_phoff);
struct drm_device *drm_dev = from_pvr_device(pvr_dev);
int err;
for (u32 entry = 0; entry < header->e_phnum; entry++, program_header++) {
void *write_addr;
/* Only consider loadable entries in the ELF segment table */
if (program_header->p_type != PT_LOAD)
continue;
err = pvr_fw_find_mmu_segment(pvr_dev, program_header->p_vaddr,
program_header->p_memsz, fw_code_ptr, fw_data_ptr,
fw_core_code_ptr, fw_core_data_ptr, &write_addr);
if (err) {
drm_err(drm_dev,
"Addr 0x%x (size: %d) not found in any firmware segment",
program_header->p_vaddr, program_header->p_memsz);
return err;
}
/* Write to FW allocation only if available */
if (write_addr) {
memcpy(write_addr, fw + program_header->p_offset,
program_header->p_filesz);
memset((u8 *)write_addr + program_header->p_filesz, 0,
program_header->p_memsz - program_header->p_filesz);
}
}
return 0;
}
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