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![Zhen Lei](/assets/img/avatar_default.png)
Fix some spelling mistakes in comments: permanentely ==> permanently wont ==> won't remaning ==> remaining succed ==> succeed shouldnt ==> shouldn't alpha-numeric ==> alphanumeric storeing ==> storing funtion ==> function documenation ==> documentation Determin ==> Determine intepreted ==> interpreted ammount ==> amount obious ==> obvious interupts ==> interrupts occured ==> occurred asssociated ==> associated taking into acount ==> taking into account squence ==> sequence stil ==> still contiguos ==> contiguous matchs ==> matches Link: https://lkml.kernel.org/r/20210607072555.12416-1-thunder.leizhen@huawei.com Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
879 lines
24 KiB
C
879 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2018-2019, Intel Corporation. */
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#include <asm/unaligned.h>
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#include <linux/crc32.h>
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#include <linux/device.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/pci.h>
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#include <linux/pldmfw.h>
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#include <linux/slab.h>
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#include <linux/uuid.h>
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#include "pldmfw_private.h"
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/* Internal structure used to store details about the PLDM image file as it is
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* being validated and processed.
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*/
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struct pldmfw_priv {
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struct pldmfw *context;
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const struct firmware *fw;
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/* current offset of firmware image */
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size_t offset;
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struct list_head records;
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struct list_head components;
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/* PLDM Firmware Package Header */
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const struct __pldm_header *header;
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u16 total_header_size;
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/* length of the component bitmap */
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u16 component_bitmap_len;
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u16 bitmap_size;
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/* Start of the component image information */
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u16 component_count;
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const u8 *component_start;
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/* Start pf the firmware device id records */
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const u8 *record_start;
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u8 record_count;
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/* The CRC at the end of the package header */
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u32 header_crc;
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struct pldmfw_record *matching_record;
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};
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/**
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* pldm_check_fw_space - Verify that the firmware image has space left
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* @data: pointer to private data
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* @offset: offset to start from
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* @length: length to check for
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*
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* Verify that the firmware data can hold a chunk of bytes with the specified
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* offset and length.
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*
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* Returns: zero on success, or -EFAULT if the image does not have enough
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* space left to fit the expected length.
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*/
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static int
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pldm_check_fw_space(struct pldmfw_priv *data, size_t offset, size_t length)
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{
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size_t expected_size = offset + length;
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struct device *dev = data->context->dev;
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if (data->fw->size < expected_size) {
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dev_dbg(dev, "Firmware file size smaller than expected. Got %zu bytes, needed %zu bytes\n",
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data->fw->size, expected_size);
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return -EFAULT;
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}
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return 0;
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}
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/**
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* pldm_move_fw_offset - Move the current firmware offset forward
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* @data: pointer to private data
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* @bytes_to_move: number of bytes to move the offset forward by
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*
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* Check that there is enough space past the current offset, and then move the
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* offset forward by this amount.
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*
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* Returns: zero on success, or -EFAULT if the image is too small to fit the
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* expected length.
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*/
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static int
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pldm_move_fw_offset(struct pldmfw_priv *data, size_t bytes_to_move)
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{
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int err;
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err = pldm_check_fw_space(data, data->offset, bytes_to_move);
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if (err)
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return err;
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data->offset += bytes_to_move;
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return 0;
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}
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/**
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* pldm_parse_header - Validate and extract details about the PLDM header
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* @data: pointer to private data
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*
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* Performs initial basic verification of the PLDM image, up to the first
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* firmware record.
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*
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* This includes the following checks and extractions
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*
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* * Verify that the UUID at the start of the header matches the expected
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* value as defined in the DSP0267 PLDM specification
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* * Check that the revision is 0x01
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* * Extract the total header_size and verify that the image is large enough
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* to contain at least the length of this header
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* * Extract the size of the component bitmap length
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* * Extract a pointer to the start of the record area
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*
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* Returns: zero on success, or a negative error code on failure.
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*/
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static int pldm_parse_header(struct pldmfw_priv *data)
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{
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const struct __pldmfw_record_area *record_area;
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struct device *dev = data->context->dev;
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const struct __pldm_header *header;
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size_t header_size;
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int err;
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err = pldm_move_fw_offset(data, sizeof(*header));
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if (err)
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return err;
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header = (const struct __pldm_header *)data->fw->data;
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data->header = header;
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if (!uuid_equal(&header->id, &pldm_firmware_header_id)) {
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dev_dbg(dev, "Invalid package header identifier. Expected UUID %pUB, but got %pUB\n",
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&pldm_firmware_header_id, &header->id);
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return -EINVAL;
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}
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if (header->revision != PACKAGE_HEADER_FORMAT_REVISION) {
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dev_dbg(dev, "Invalid package header revision. Expected revision %u but got %u\n",
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PACKAGE_HEADER_FORMAT_REVISION, header->revision);
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return -EOPNOTSUPP;
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}
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data->total_header_size = get_unaligned_le16(&header->size);
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header_size = data->total_header_size - sizeof(*header);
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err = pldm_check_fw_space(data, data->offset, header_size);
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if (err)
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return err;
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data->component_bitmap_len =
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get_unaligned_le16(&header->component_bitmap_len);
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if (data->component_bitmap_len % 8 != 0) {
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dev_dbg(dev, "Invalid component bitmap length. The length is %u, which is not a multiple of 8\n",
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data->component_bitmap_len);
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return -EINVAL;
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}
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data->bitmap_size = data->component_bitmap_len / 8;
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err = pldm_move_fw_offset(data, header->version_len);
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if (err)
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return err;
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/* extract a pointer to the record area, which just follows the main
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* PLDM header data.
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*/
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record_area = (const struct __pldmfw_record_area *)(data->fw->data +
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data->offset);
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err = pldm_move_fw_offset(data, sizeof(*record_area));
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if (err)
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return err;
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data->record_count = record_area->record_count;
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data->record_start = record_area->records;
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return 0;
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}
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/**
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* pldm_check_desc_tlv_len - Check that the length matches expectation
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* @data: pointer to image details
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* @type: the descriptor type
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* @size: the length from the descriptor header
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*
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* If the descriptor type is one of the documented descriptor types according
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* to the standard, verify that the provided length matches.
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*
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* If the type is not recognized or is VENDOR_DEFINED, return zero.
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*
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* Returns: zero on success, or -EINVAL if the specified size of a standard
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* TLV does not match the expected value defined for that TLV.
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*/
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static int
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pldm_check_desc_tlv_len(struct pldmfw_priv *data, u16 type, u16 size)
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{
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struct device *dev = data->context->dev;
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u16 expected_size;
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switch (type) {
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case PLDM_DESC_ID_PCI_VENDOR_ID:
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case PLDM_DESC_ID_PCI_DEVICE_ID:
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case PLDM_DESC_ID_PCI_SUBVENDOR_ID:
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case PLDM_DESC_ID_PCI_SUBDEV_ID:
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expected_size = 2;
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break;
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case PLDM_DESC_ID_PCI_REVISION_ID:
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expected_size = 1;
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break;
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case PLDM_DESC_ID_PNP_VENDOR_ID:
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expected_size = 3;
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break;
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case PLDM_DESC_ID_IANA_ENTERPRISE_ID:
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case PLDM_DESC_ID_ACPI_VENDOR_ID:
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case PLDM_DESC_ID_PNP_PRODUCT_ID:
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case PLDM_DESC_ID_ACPI_PRODUCT_ID:
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expected_size = 4;
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break;
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case PLDM_DESC_ID_UUID:
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expected_size = 16;
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break;
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case PLDM_DESC_ID_VENDOR_DEFINED:
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return 0;
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default:
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/* Do not report an error on an unexpected TLV */
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dev_dbg(dev, "Found unrecognized TLV type 0x%04x\n", type);
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return 0;
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}
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if (size != expected_size) {
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dev_dbg(dev, "Found TLV type 0x%04x with unexpected length. Got %u bytes, but expected %u bytes\n",
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type, size, expected_size);
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return -EINVAL;
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}
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return 0;
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}
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/**
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* pldm_parse_desc_tlvs - Check and skip past a number of TLVs
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* @data: pointer to private data
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* @record: pointer to the record this TLV belongs too
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* @desc_count: descriptor count
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*
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* From the current offset, read and extract the descriptor TLVs, updating the
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* current offset each time.
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*
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* Returns: zero on success, or a negative error code on failure.
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*/
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static int
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pldm_parse_desc_tlvs(struct pldmfw_priv *data, struct pldmfw_record *record, u8 desc_count)
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{
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const struct __pldmfw_desc_tlv *__desc;
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const u8 *desc_start;
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u8 i;
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desc_start = data->fw->data + data->offset;
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pldm_for_each_desc_tlv(i, __desc, desc_start, desc_count) {
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struct pldmfw_desc_tlv *desc;
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int err;
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u16 type, size;
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err = pldm_move_fw_offset(data, sizeof(*__desc));
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if (err)
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return err;
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type = get_unaligned_le16(&__desc->type);
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/* According to DSP0267, this only includes the data field */
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size = get_unaligned_le16(&__desc->size);
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err = pldm_check_desc_tlv_len(data, type, size);
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if (err)
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return err;
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/* check that we have space and move the offset forward */
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err = pldm_move_fw_offset(data, size);
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if (err)
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return err;
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desc = kzalloc(sizeof(*desc), GFP_KERNEL);
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if (!desc)
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return -ENOMEM;
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desc->type = type;
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desc->size = size;
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desc->data = __desc->data;
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list_add_tail(&desc->entry, &record->descs);
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}
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return 0;
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}
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/**
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* pldm_parse_one_record - Verify size of one PLDM record
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* @data: pointer to image details
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* @__record: pointer to the record to check
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*
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* This function checks that the record size does not exceed either the size
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* of the firmware file or the total length specified in the header section.
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*
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* It also verifies that the recorded length of the start of the record
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* matches the size calculated by adding the static structure length, the
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* component bitmap length, the version string length, the length of all
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* descriptor TLVs, and the length of the package data.
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*
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* Returns: zero on success, or a negative error code on failure.
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*/
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static int
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pldm_parse_one_record(struct pldmfw_priv *data,
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const struct __pldmfw_record_info *__record)
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{
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struct pldmfw_record *record;
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size_t measured_length;
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int err;
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const u8 *bitmap_ptr;
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u16 record_len;
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int i;
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/* Make a copy and insert it into the record list */
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record = kzalloc(sizeof(*record), GFP_KERNEL);
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if (!record)
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return -ENOMEM;
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INIT_LIST_HEAD(&record->descs);
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list_add_tail(&record->entry, &data->records);
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/* Then check that we have space and move the offset */
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err = pldm_move_fw_offset(data, sizeof(*__record));
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if (err)
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return err;
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record_len = get_unaligned_le16(&__record->record_len);
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record->package_data_len = get_unaligned_le16(&__record->package_data_len);
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record->version_len = __record->version_len;
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record->version_type = __record->version_type;
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bitmap_ptr = data->fw->data + data->offset;
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/* check that we have space for the component bitmap length */
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err = pldm_move_fw_offset(data, data->bitmap_size);
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if (err)
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return err;
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record->component_bitmap_len = data->component_bitmap_len;
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record->component_bitmap = bitmap_zalloc(record->component_bitmap_len,
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GFP_KERNEL);
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if (!record->component_bitmap)
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return -ENOMEM;
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for (i = 0; i < data->bitmap_size; i++)
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bitmap_set_value8(record->component_bitmap, bitmap_ptr[i], i * 8);
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record->version_string = data->fw->data + data->offset;
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err = pldm_move_fw_offset(data, record->version_len);
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if (err)
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return err;
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/* Scan through the descriptor TLVs and find the end */
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err = pldm_parse_desc_tlvs(data, record, __record->descriptor_count);
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if (err)
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return err;
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record->package_data = data->fw->data + data->offset;
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err = pldm_move_fw_offset(data, record->package_data_len);
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if (err)
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return err;
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measured_length = data->offset - ((const u8 *)__record - data->fw->data);
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if (measured_length != record_len) {
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dev_dbg(data->context->dev, "Unexpected record length. Measured record length is %zu bytes, expected length is %u bytes\n",
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measured_length, record_len);
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return -EFAULT;
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}
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return 0;
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}
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/**
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* pldm_parse_records - Locate the start of the component area
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* @data: pointer to private data
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*
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* Extract the record count, and loop through each record, searching for the
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* component area.
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*
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* Returns: zero on success, or a negative error code on failure.
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*/
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static int pldm_parse_records(struct pldmfw_priv *data)
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{
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const struct __pldmfw_component_area *component_area;
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const struct __pldmfw_record_info *record;
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int err;
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u8 i;
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pldm_for_each_record(i, record, data->record_start, data->record_count) {
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err = pldm_parse_one_record(data, record);
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if (err)
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return err;
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}
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/* Extract a pointer to the component area, which just follows the
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* PLDM device record data.
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*/
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component_area = (const struct __pldmfw_component_area *)(data->fw->data + data->offset);
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err = pldm_move_fw_offset(data, sizeof(*component_area));
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if (err)
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return err;
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data->component_count =
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get_unaligned_le16(&component_area->component_image_count);
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data->component_start = component_area->components;
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return 0;
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}
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/**
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* pldm_parse_components - Locate the CRC header checksum
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* @data: pointer to private data
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*
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* Extract the component count, and find the pointer to the component area.
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* Scan through each component searching for the end, which should point to
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* the package header checksum.
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*
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* Extract the package header CRC and save it for verification.
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*
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* Returns: zero on success, or a negative error code on failure.
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*/
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static int pldm_parse_components(struct pldmfw_priv *data)
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{
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const struct __pldmfw_component_info *__component;
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struct device *dev = data->context->dev;
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const u8 *header_crc_ptr;
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int err;
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u8 i;
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pldm_for_each_component(i, __component, data->component_start, data->component_count) {
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struct pldmfw_component *component;
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u32 offset, size;
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err = pldm_move_fw_offset(data, sizeof(*__component));
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if (err)
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return err;
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err = pldm_move_fw_offset(data, __component->version_len);
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if (err)
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return err;
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offset = get_unaligned_le32(&__component->location_offset);
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size = get_unaligned_le32(&__component->size);
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err = pldm_check_fw_space(data, offset, size);
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if (err)
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return err;
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component = kzalloc(sizeof(*component), GFP_KERNEL);
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if (!component)
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return -ENOMEM;
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component->index = i;
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component->classification = get_unaligned_le16(&__component->classification);
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component->identifier = get_unaligned_le16(&__component->identifier);
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component->comparison_stamp = get_unaligned_le32(&__component->comparison_stamp);
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component->options = get_unaligned_le16(&__component->options);
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component->activation_method = get_unaligned_le16(&__component->activation_method);
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component->version_type = __component->version_type;
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component->version_len = __component->version_len;
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component->version_string = __component->version_string;
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component->component_data = data->fw->data + offset;
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component->component_size = size;
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list_add_tail(&component->entry, &data->components);
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}
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header_crc_ptr = data->fw->data + data->offset;
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err = pldm_move_fw_offset(data, sizeof(data->header_crc));
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if (err)
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return err;
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/* Make sure that we reached the expected offset */
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if (data->offset != data->total_header_size) {
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dev_dbg(dev, "Invalid firmware header size. Expected %u but got %zu\n",
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data->total_header_size, data->offset);
|
|
return -EFAULT;
|
|
}
|
|
|
|
data->header_crc = get_unaligned_le32(header_crc_ptr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pldm_verify_header_crc - Verify that the CRC in the header matches
|
|
* @data: pointer to private data
|
|
*
|
|
* Calculates the 32-bit CRC using the standard IEEE 802.3 CRC polynomial and
|
|
* compares it to the value stored in the header.
|
|
*
|
|
* Returns: zero on success if the CRC matches, or -EBADMSG on an invalid CRC.
|
|
*/
|
|
static int pldm_verify_header_crc(struct pldmfw_priv *data)
|
|
{
|
|
struct device *dev = data->context->dev;
|
|
u32 calculated_crc;
|
|
size_t length;
|
|
|
|
/* Calculate the 32-bit CRC of the header header contents up to but
|
|
* not including the checksum. Note that the Linux crc32_le function
|
|
* does not perform an expected final XOR.
|
|
*/
|
|
length = data->offset - sizeof(data->header_crc);
|
|
calculated_crc = crc32_le(~0, data->fw->data, length) ^ ~0;
|
|
|
|
if (calculated_crc != data->header_crc) {
|
|
dev_dbg(dev, "Invalid CRC in firmware header. Got 0x%08x but expected 0x%08x\n",
|
|
calculated_crc, data->header_crc);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pldmfw_free_priv - Free memory allocated while parsing the PLDM image
|
|
* @data: pointer to the PLDM data structure
|
|
*
|
|
* Loops through and clears all allocated memory associated with each
|
|
* allocated descriptor, record, and component.
|
|
*/
|
|
static void pldmfw_free_priv(struct pldmfw_priv *data)
|
|
{
|
|
struct pldmfw_component *component, *c_safe;
|
|
struct pldmfw_record *record, *r_safe;
|
|
struct pldmfw_desc_tlv *desc, *d_safe;
|
|
|
|
list_for_each_entry_safe(component, c_safe, &data->components, entry) {
|
|
list_del(&component->entry);
|
|
kfree(component);
|
|
}
|
|
|
|
list_for_each_entry_safe(record, r_safe, &data->records, entry) {
|
|
list_for_each_entry_safe(desc, d_safe, &record->descs, entry) {
|
|
list_del(&desc->entry);
|
|
kfree(desc);
|
|
}
|
|
|
|
if (record->component_bitmap) {
|
|
bitmap_free(record->component_bitmap);
|
|
record->component_bitmap = NULL;
|
|
}
|
|
|
|
list_del(&record->entry);
|
|
kfree(record);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pldm_parse_image - parse and extract details from PLDM image
|
|
* @data: pointer to private data
|
|
*
|
|
* Verify that the firmware file contains valid data for a PLDM firmware
|
|
* file. Extract useful pointers and data from the firmware file and store
|
|
* them in the data structure.
|
|
*
|
|
* The PLDM firmware file format is defined in DMTF DSP0267 1.0.0. Care
|
|
* should be taken to use get_unaligned_le* when accessing data from the
|
|
* pointers in data.
|
|
*
|
|
* Returns: zero on success, or a negative error code on failure.
|
|
*/
|
|
static int pldm_parse_image(struct pldmfw_priv *data)
|
|
{
|
|
int err;
|
|
|
|
if (WARN_ON(!(data->context->dev && data->fw->data && data->fw->size)))
|
|
return -EINVAL;
|
|
|
|
err = pldm_parse_header(data);
|
|
if (err)
|
|
return err;
|
|
|
|
err = pldm_parse_records(data);
|
|
if (err)
|
|
return err;
|
|
|
|
err = pldm_parse_components(data);
|
|
if (err)
|
|
return err;
|
|
|
|
return pldm_verify_header_crc(data);
|
|
}
|
|
|
|
/* these are u32 so that we can store PCI_ANY_ID */
|
|
struct pldm_pci_record_id {
|
|
int vendor;
|
|
int device;
|
|
int subsystem_vendor;
|
|
int subsystem_device;
|
|
};
|
|
|
|
/**
|
|
* pldmfw_op_pci_match_record - Check if a PCI device matches the record
|
|
* @context: PLDM fw update structure
|
|
* @record: list of records extracted from the PLDM image
|
|
*
|
|
* Determine of the PCI device associated with this device matches the record
|
|
* data provided.
|
|
*
|
|
* Searches the descriptor TLVs and extracts the relevant descriptor data into
|
|
* a pldm_pci_record_id. This is then compared against the PCI device ID
|
|
* information.
|
|
*
|
|
* Returns: true if the device matches the record, false otherwise.
|
|
*/
|
|
bool pldmfw_op_pci_match_record(struct pldmfw *context, struct pldmfw_record *record)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(context->dev);
|
|
struct pldm_pci_record_id id = {
|
|
.vendor = PCI_ANY_ID,
|
|
.device = PCI_ANY_ID,
|
|
.subsystem_vendor = PCI_ANY_ID,
|
|
.subsystem_device = PCI_ANY_ID,
|
|
};
|
|
struct pldmfw_desc_tlv *desc;
|
|
|
|
list_for_each_entry(desc, &record->descs, entry) {
|
|
u16 value;
|
|
int *ptr;
|
|
|
|
switch (desc->type) {
|
|
case PLDM_DESC_ID_PCI_VENDOR_ID:
|
|
ptr = &id.vendor;
|
|
break;
|
|
case PLDM_DESC_ID_PCI_DEVICE_ID:
|
|
ptr = &id.device;
|
|
break;
|
|
case PLDM_DESC_ID_PCI_SUBVENDOR_ID:
|
|
ptr = &id.subsystem_vendor;
|
|
break;
|
|
case PLDM_DESC_ID_PCI_SUBDEV_ID:
|
|
ptr = &id.subsystem_device;
|
|
break;
|
|
default:
|
|
/* Skip unrelated TLVs */
|
|
continue;
|
|
}
|
|
|
|
value = get_unaligned_le16(desc->data);
|
|
/* A value of zero for one of the descriptors is sometimes
|
|
* used when the record should ignore this field when matching
|
|
* device. For example if the record applies to any subsystem
|
|
* device or vendor.
|
|
*/
|
|
if (value)
|
|
*ptr = (int)value;
|
|
else
|
|
*ptr = PCI_ANY_ID;
|
|
}
|
|
|
|
if ((id.vendor == PCI_ANY_ID || id.vendor == pdev->vendor) &&
|
|
(id.device == PCI_ANY_ID || id.device == pdev->device) &&
|
|
(id.subsystem_vendor == PCI_ANY_ID || id.subsystem_vendor == pdev->subsystem_vendor) &&
|
|
(id.subsystem_device == PCI_ANY_ID || id.subsystem_device == pdev->subsystem_device))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL(pldmfw_op_pci_match_record);
|
|
|
|
/**
|
|
* pldm_find_matching_record - Find the first matching PLDM record
|
|
* @data: pointer to private data
|
|
*
|
|
* Search through PLDM records and find the first matching entry. It is
|
|
* expected that only one entry matches.
|
|
*
|
|
* Store a pointer to the matching record, if found.
|
|
*
|
|
* Returns: zero on success, or -ENOENT if no matching record is found.
|
|
*/
|
|
static int pldm_find_matching_record(struct pldmfw_priv *data)
|
|
{
|
|
struct pldmfw_record *record;
|
|
|
|
list_for_each_entry(record, &data->records, entry) {
|
|
if (data->context->ops->match_record(data->context, record)) {
|
|
data->matching_record = record;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
/**
|
|
* pldm_send_package_data - Send firmware the package data for the record
|
|
* @data: pointer to private data
|
|
*
|
|
* Send the package data associated with the matching record to the firmware,
|
|
* using the send_pkg_data operation.
|
|
*
|
|
* Returns: zero on success, or a negative error code on failure.
|
|
*/
|
|
static int
|
|
pldm_send_package_data(struct pldmfw_priv *data)
|
|
{
|
|
struct pldmfw_record *record = data->matching_record;
|
|
const struct pldmfw_ops *ops = data->context->ops;
|
|
|
|
return ops->send_package_data(data->context, record->package_data,
|
|
record->package_data_len);
|
|
}
|
|
|
|
/**
|
|
* pldm_send_component_tables - Send component table information to firmware
|
|
* @data: pointer to private data
|
|
*
|
|
* Loop over each component, sending the applicable components to the firmware
|
|
* via the send_component_table operation.
|
|
*
|
|
* Returns: zero on success, or a negative error code on failure.
|
|
*/
|
|
static int
|
|
pldm_send_component_tables(struct pldmfw_priv *data)
|
|
{
|
|
unsigned long *bitmap = data->matching_record->component_bitmap;
|
|
struct pldmfw_component *component;
|
|
int err;
|
|
|
|
list_for_each_entry(component, &data->components, entry) {
|
|
u8 index = component->index, transfer_flag = 0;
|
|
|
|
/* Skip components which are not intended for this device */
|
|
if (!test_bit(index, bitmap))
|
|
continue;
|
|
|
|
/* determine whether this is the start, middle, end, or both
|
|
* the start and end of the component tables
|
|
*/
|
|
if (index == find_first_bit(bitmap, data->component_bitmap_len))
|
|
transfer_flag |= PLDM_TRANSFER_FLAG_START;
|
|
if (index == find_last_bit(bitmap, data->component_bitmap_len))
|
|
transfer_flag |= PLDM_TRANSFER_FLAG_END;
|
|
if (!transfer_flag)
|
|
transfer_flag = PLDM_TRANSFER_FLAG_MIDDLE;
|
|
|
|
err = data->context->ops->send_component_table(data->context,
|
|
component,
|
|
transfer_flag);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pldm_flash_components - Program each component to device flash
|
|
* @data: pointer to private data
|
|
*
|
|
* Loop through each component that is active for the matching device record,
|
|
* and send it to the device driver for flashing.
|
|
*
|
|
* Returns: zero on success, or a negative error code on failure.
|
|
*/
|
|
static int pldm_flash_components(struct pldmfw_priv *data)
|
|
{
|
|
unsigned long *bitmap = data->matching_record->component_bitmap;
|
|
struct pldmfw_component *component;
|
|
int err;
|
|
|
|
list_for_each_entry(component, &data->components, entry) {
|
|
u8 index = component->index;
|
|
|
|
/* Skip components which are not intended for this device */
|
|
if (!test_bit(index, bitmap))
|
|
continue;
|
|
|
|
err = data->context->ops->flash_component(data->context, component);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pldm_finalize_update - Finalize the device flash update
|
|
* @data: pointer to private data
|
|
*
|
|
* Tell the device driver to perform any remaining logic to complete the
|
|
* device update.
|
|
*
|
|
* Returns: zero on success, or a PLFM_FWU error indicating the reason for
|
|
* failure.
|
|
*/
|
|
static int pldm_finalize_update(struct pldmfw_priv *data)
|
|
{
|
|
if (data->context->ops->finalize_update)
|
|
return data->context->ops->finalize_update(data->context);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pldmfw_flash_image - Write a PLDM-formatted firmware image to the device
|
|
* @context: ops and data for firmware update
|
|
* @fw: firmware object pointing to the relevant firmware file to program
|
|
*
|
|
* Parse the data for a given firmware file, verifying that it is a valid PLDM
|
|
* formatted image that matches this device.
|
|
*
|
|
* Extract the device record Package Data and Component Tables and send them
|
|
* to the device firmware. Extract and write the flash data for each of the
|
|
* components indicated in the firmware file.
|
|
*
|
|
* Returns: zero on success, or a negative error code on failure.
|
|
*/
|
|
int pldmfw_flash_image(struct pldmfw *context, const struct firmware *fw)
|
|
{
|
|
struct pldmfw_priv *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&data->records);
|
|
INIT_LIST_HEAD(&data->components);
|
|
|
|
data->fw = fw;
|
|
data->context = context;
|
|
|
|
err = pldm_parse_image(data);
|
|
if (err)
|
|
goto out_release_data;
|
|
|
|
err = pldm_find_matching_record(data);
|
|
if (err)
|
|
goto out_release_data;
|
|
|
|
err = pldm_send_package_data(data);
|
|
if (err)
|
|
goto out_release_data;
|
|
|
|
err = pldm_send_component_tables(data);
|
|
if (err)
|
|
goto out_release_data;
|
|
|
|
err = pldm_flash_components(data);
|
|
if (err)
|
|
goto out_release_data;
|
|
|
|
err = pldm_finalize_update(data);
|
|
|
|
out_release_data:
|
|
pldmfw_free_priv(data);
|
|
kfree(data);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(pldmfw_flash_image);
|
|
|
|
MODULE_AUTHOR("Jacob Keller <jacob.e.keller@intel.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("PLDM firmware flash update library");
|