1 files changed, 66 insertions, 0 deletions
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 000000000000..377fe72d86b8
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_fw_util.c
@@ -0,0 +1,66 @@
+// 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;
+}