Currently only MIPS firmware processors use ELF-formatted firmware. When adding support for RISC-V firmware processors, it will be useful to have ELF handling functions ready to go.
Signed-off-by: Matt Coster <matt.cos...@imgtec.com> --- Changes in v4: - None - Link to v3: https://lore.kernel.org/r/20250310-sets-bxs-4-64-patch-v1-v3-13-143b3dbef...@imgtec.com Changes in v3: - None - Link to v2: https://lore.kernel.org/r/20241118-sets-bxs-4-64-patch-v1-v2-16-3fd45d9fb...@imgtec.com Changes in v2: - None - Link to v1: https://lore.kernel.org/r/20241105-sets-bxs-4-64-patch-v1-v1-16-4ed30e865...@imgtec.com --- drivers/gpu/drm/imagination/Makefile | 1 + drivers/gpu/drm/imagination/pvr_fw.h | 5 +++ drivers/gpu/drm/imagination/pvr_fw_mips.c | 59 +-------------------------- drivers/gpu/drm/imagination/pvr_fw_util.c | 67 +++++++++++++++++++++++++++++++ 4 files changed, 75 insertions(+), 57 deletions(-) diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile index 9bc6a3884c2239e44265f3cdebee149841b270de..077e4762c7c383b6e339da1584c3865d830ef8d6 100644 --- a/drivers/gpu/drm/imagination/Makefile +++ b/drivers/gpu/drm/imagination/Makefile @@ -16,6 +16,7 @@ powervr-y := \ pvr_fw_mips.o \ pvr_fw_startstop.o \ pvr_fw_trace.o \ + pvr_fw_util.o \ pvr_gem.o \ pvr_hwrt.o \ pvr_job.o \ diff --git a/drivers/gpu/drm/imagination/pvr_fw.h b/drivers/gpu/drm/imagination/pvr_fw.h index ab69f40a7fbc6304171f16dd16d825a68b0362a5..e120eae06bf78633b5bae79a77adac63aa5e06d3 100644 --- a/drivers/gpu/drm/imagination/pvr_fw.h +++ b/drivers/gpu/drm/imagination/pvr_fw.h @@ -478,4 +478,9 @@ pvr_fw_object_get_fw_addr(struct pvr_fw_object *fw_obj, u32 *fw_addr_out) pvr_fw_object_get_fw_addr_offset(fw_obj, 0, fw_addr_out); } +/* Util functions defined in pvr_fw_util.c. These are intended for use in pvr_fw_<arch>.c files. */ +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); + #endif /* PVR_FW_H */ diff --git a/drivers/gpu/drm/imagination/pvr_fw_mips.c b/drivers/gpu/drm/imagination/pvr_fw_mips.c index 524a9bd0a20b64c509f5708cc61d93b4c864b835..7f341ceb0661c61ac059654faeec91e149036467 100644 --- a/drivers/gpu/drm/imagination/pvr_fw_mips.c +++ b/drivers/gpu/drm/imagination/pvr_fw_mips.c @@ -8,7 +8,6 @@ #include "pvr_rogue_mips.h" #include "pvr_vm_mips.h" -#include <linux/elf.h> #include <linux/err.h> #include <linux/types.h> @@ -16,60 +15,6 @@ #define ROGUE_FW_HEAP_MIPS_SHIFT 24 /* 16 MB */ #define ROGUE_FW_HEAP_MIPS_RESERVED_SIZE SZ_1M -/** - * 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. - */ -static int -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); - u32 entry; - int err; - - for (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; -} - static int pvr_mips_init(struct pvr_device *pvr_dev) { @@ -100,8 +45,8 @@ pvr_mips_fw_process(struct pvr_device *pvr_dev, const u8 *fw, u32 page_nr; int err; - err = process_elf_command_stream(pvr_dev, fw, fw_code_ptr, fw_data_ptr, fw_core_code_ptr, - fw_core_data_ptr); + err = pvr_fw_process_elf_command_stream(pvr_dev, fw, fw_code_ptr, fw_data_ptr, + fw_core_code_ptr, fw_core_data_ptr); if (err) return err; diff --git a/drivers/gpu/drm/imagination/pvr_fw_util.c b/drivers/gpu/drm/imagination/pvr_fw_util.c new file mode 100644 index 0000000000000000000000000000000000000000..7bc8a5c48e9b0eed2045607ab2cfed80a60a32b5 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_fw_util.c @@ -0,0 +1,67 @@ +// 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); + u32 entry; + int err; + + for (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; +} -- 2.49.0
