u-boot/common/spl/spl_fit.c
Stefan Herbrechtsmeier 77253c50ab spl: fit: Allocate buffers aligned to cache line size
Allocate memory for buffers at a cache-line boundary to avoid
misaligned buffer address for subsequent reads. This avoids an
additional sector-based memory copy in the fat file system driver:

FAT: Misaligned buffer address (...)

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
2022-09-14 15:23:03 -04:00

844 lines
22 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <errno.h>
#include <fpga.h>
#include <gzip.h>
#include <image.h>
#include <log.h>
#include <memalign.h>
#include <mapmem.h>
#include <spl.h>
#include <sysinfo.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
#define CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ (64 * 1024)
#endif
#ifndef CONFIG_SYS_BOOTM_LEN
#define CONFIG_SYS_BOOTM_LEN (64 << 20)
#endif
struct spl_fit_info {
const void *fit; /* Pointer to a valid FIT blob */
size_t ext_data_offset; /* Offset to FIT external data (end of FIT) */
int images_node; /* FDT offset to "/images" node */
int conf_node; /* FDT offset to selected configuration node */
};
__weak void board_spl_fit_post_load(const void *fit)
{
}
__weak ulong board_spl_fit_size_align(ulong size)
{
return size;
}
static int find_node_from_desc(const void *fit, int node, const char *str)
{
int child;
if (node < 0)
return -EINVAL;
/* iterate the FIT nodes and find a matching description */
for (child = fdt_first_subnode(fit, node); child >= 0;
child = fdt_next_subnode(fit, child)) {
int len;
const char *desc = fdt_getprop(fit, child, "description", &len);
if (!desc)
continue;
if (!strcmp(desc, str))
return child;
}
return -ENOENT;
}
/**
* spl_fit_get_image_name(): By using the matching configuration subnode,
* retrieve the name of an image, specified by a property name and an index
* into that.
* @fit: Pointer to the FDT blob.
* @images: Offset of the /images subnode.
* @type: Name of the property within the configuration subnode.
* @index: Index into the list of strings in this property.
* @outname: Name of the image
*
* Return: 0 on success, or a negative error number
*/
static int spl_fit_get_image_name(const struct spl_fit_info *ctx,
const char *type, int index,
const char **outname)
{
struct udevice *sysinfo;
const char *name, *str;
__maybe_unused int node;
int len, i;
bool found = true;
name = fdt_getprop(ctx->fit, ctx->conf_node, type, &len);
if (!name) {
debug("cannot find property '%s': %d\n", type, len);
return -EINVAL;
}
str = name;
for (i = 0; i < index; i++) {
str = strchr(str, '\0') + 1;
if (!str || (str - name >= len)) {
found = false;
break;
}
}
if (!found && CONFIG_IS_ENABLED(SYSINFO) && !sysinfo_get(&sysinfo)) {
int rc;
/*
* no string in the property for this index. Check if the
* sysinfo-level code can supply one.
*/
rc = sysinfo_detect(sysinfo);
if (rc)
return rc;
rc = sysinfo_get_fit_loadable(sysinfo, index - i - 1, type,
&str);
if (rc && rc != -ENOENT)
return rc;
if (!rc) {
/*
* The sysinfo provided a name for a loadable.
* Try to match it against the description properties
* first. If no matching node is found, use it as a
* node name.
*/
int node;
int images = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
node = find_node_from_desc(ctx->fit, images, str);
if (node > 0)
str = fdt_get_name(ctx->fit, node, NULL);
found = true;
}
}
if (!found) {
debug("no string for index %d\n", index);
return -E2BIG;
}
*outname = str;
return 0;
}
/**
* spl_fit_get_image_node(): By using the matching configuration subnode,
* retrieve the name of an image, specified by a property name and an index
* into that.
* @fit: Pointer to the FDT blob.
* @images: Offset of the /images subnode.
* @type: Name of the property within the configuration subnode.
* @index: Index into the list of strings in this property.
*
* Return: the node offset of the respective image node or a negative
* error number.
*/
static int spl_fit_get_image_node(const struct spl_fit_info *ctx,
const char *type, int index)
{
const char *str;
int err;
int node;
err = spl_fit_get_image_name(ctx, type, index, &str);
if (err)
return err;
debug("%s: '%s'\n", type, str);
node = fdt_subnode_offset(ctx->fit, ctx->images_node, str);
if (node < 0) {
pr_err("cannot find image node '%s': %d\n", str, node);
return -EINVAL;
}
return node;
}
static int get_aligned_image_offset(struct spl_load_info *info, int offset)
{
/*
* If it is a FS read, get the first address before offset which is
* aligned to ARCH_DMA_MINALIGN. If it is raw read return the
* block number to which offset belongs.
*/
if (info->filename)
return offset & ~(ARCH_DMA_MINALIGN - 1);
return offset / info->bl_len;
}
static int get_aligned_image_overhead(struct spl_load_info *info, int offset)
{
/*
* If it is a FS read, get the difference between the offset and
* the first address before offset which is aligned to
* ARCH_DMA_MINALIGN. If it is raw read return the offset within the
* block.
*/
if (info->filename)
return offset & (ARCH_DMA_MINALIGN - 1);
return offset % info->bl_len;
}
static int get_aligned_image_size(struct spl_load_info *info, int data_size,
int offset)
{
data_size = data_size + get_aligned_image_overhead(info, offset);
if (info->filename)
return data_size;
return (data_size + info->bl_len - 1) / info->bl_len;
}
/**
* spl_load_fit_image(): load the image described in a certain FIT node
* @info: points to information about the device to load data from
* @sector: the start sector of the FIT image on the device
* @ctx: points to the FIT context structure
* @node: offset of the DT node describing the image to load (relative
* to @fit)
* @image_info: will be filled with information about the loaded image
* If the FIT node does not contain a "load" (address) property,
* the image gets loaded to the address pointed to by the
* load_addr member in this struct, if load_addr is not 0
*
* Return: 0 on success or a negative error number.
*/
static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
const struct spl_fit_info *ctx, int node,
struct spl_image_info *image_info)
{
int offset;
size_t length;
int len;
ulong size;
ulong load_addr;
void *load_ptr;
void *src;
ulong overhead;
int nr_sectors;
uint8_t image_comp = -1, type = -1;
const void *data;
const void *fit = ctx->fit;
bool external_data = false;
if (IS_ENABLED(CONFIG_SPL_FPGA) ||
(IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP))) {
if (fit_image_get_type(fit, node, &type))
puts("Cannot get image type.\n");
else
debug("%s ", genimg_get_type_name(type));
}
if (IS_ENABLED(CONFIG_SPL_GZIP)) {
fit_image_get_comp(fit, node, &image_comp);
debug("%s ", genimg_get_comp_name(image_comp));
}
if (fit_image_get_load(fit, node, &load_addr)) {
if (!image_info->load_addr) {
printf("Can't load %s: No load address and no buffer\n",
fit_get_name(fit, node, NULL));
return -ENOBUFS;
}
load_addr = image_info->load_addr;
}
if (!fit_image_get_data_position(fit, node, &offset)) {
external_data = true;
} else if (!fit_image_get_data_offset(fit, node, &offset)) {
offset += ctx->ext_data_offset;
external_data = true;
}
if (external_data) {
void *src_ptr;
/* External data */
if (fit_image_get_data_size(fit, node, &len))
return -ENOENT;
/* Dont bother to copy 0 byte data, but warn, though */
if (!len) {
log_warning("%s: Skip load '%s': image size is 0!\n",
__func__, fit_get_name(fit, node, NULL));
return 0;
}
src_ptr = map_sysmem(ALIGN(load_addr, ARCH_DMA_MINALIGN), len);
length = len;
overhead = get_aligned_image_overhead(info, offset);
nr_sectors = get_aligned_image_size(info, length, offset);
if (info->read(info,
sector + get_aligned_image_offset(info, offset),
nr_sectors, src_ptr) != nr_sectors)
return -EIO;
debug("External data: dst=%p, offset=%x, size=%lx\n",
src_ptr, offset, (unsigned long)length);
src = src_ptr + overhead;
} else {
/* Embedded data */
if (fit_image_get_data(fit, node, &data, &length)) {
puts("Cannot get image data/size\n");
return -ENOENT;
}
debug("Embedded data: dst=%lx, size=%lx\n", load_addr,
(unsigned long)length);
src = (void *)data; /* cast away const */
}
if (CONFIG_IS_ENABLED(FIT_SIGNATURE)) {
printf("## Checking hash(es) for Image %s ... ",
fit_get_name(fit, node, NULL));
if (!fit_image_verify_with_data(fit, node, gd_fdt_blob(), src,
length))
return -EPERM;
puts("OK\n");
}
if (CONFIG_IS_ENABLED(FIT_IMAGE_POST_PROCESS))
board_fit_image_post_process(fit, node, &src, &length);
load_ptr = map_sysmem(load_addr, length);
if (IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) {
size = length;
if (gunzip(load_ptr, CONFIG_SYS_BOOTM_LEN, src, &size)) {
puts("Uncompressing error\n");
return -EIO;
}
length = size;
} else {
memcpy(load_ptr, src, length);
}
if (image_info) {
ulong entry_point;
image_info->load_addr = load_addr;
image_info->size = length;
if (!fit_image_get_entry(fit, node, &entry_point))
image_info->entry_point = entry_point;
else
image_info->entry_point = FDT_ERROR;
}
return 0;
}
static bool os_takes_devicetree(uint8_t os)
{
switch (os) {
case IH_OS_U_BOOT:
return true;
case IH_OS_LINUX:
return IS_ENABLED(CONFIG_SPL_OS_BOOT);
default:
return false;
}
}
static int spl_fit_append_fdt(struct spl_image_info *spl_image,
struct spl_load_info *info, ulong sector,
const struct spl_fit_info *ctx)
{
struct spl_image_info image_info;
int node, ret = 0, index = 0;
/*
* Use the address following the image as target address for the
* device tree.
*/
image_info.load_addr = spl_image->load_addr + spl_image->size;
/* Figure out which device tree the board wants to use */
node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index++);
if (node < 0) {
debug("%s: cannot find FDT node\n", __func__);
/*
* U-Boot did not find a device tree inside the FIT image. Use
* the U-Boot device tree instead.
*/
if (gd->fdt_blob)
memcpy((void *)image_info.load_addr, gd->fdt_blob,
fdt_totalsize(gd->fdt_blob));
else
return node;
} else {
ret = spl_load_fit_image(info, sector, ctx, node,
&image_info);
if (ret < 0)
return ret;
}
/* Make the load-address of the FDT available for the SPL framework */
spl_image->fdt_addr = map_sysmem(image_info.load_addr, 0);
if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
return 0;
if (CONFIG_IS_ENABLED(LOAD_FIT_APPLY_OVERLAY)) {
void *tmpbuffer = NULL;
for (; ; index++) {
node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index);
if (node == -E2BIG) {
debug("%s: No additional FDT node\n", __func__);
break;
} else if (node < 0) {
debug("%s: unable to find FDT node %d\n",
__func__, index);
continue;
}
if (!tmpbuffer) {
/*
* allocate memory to store the DT overlay
* before it is applied. It may not be used
* depending on how the overlay is stored, so
* don't fail yet if the allocation failed.
*/
size_t size = CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ;
tmpbuffer = malloc_cache_aligned(size);
if (!tmpbuffer)
debug("%s: unable to allocate space for overlays\n",
__func__);
}
image_info.load_addr = (ulong)tmpbuffer;
ret = spl_load_fit_image(info, sector, ctx,
node, &image_info);
if (ret < 0)
break;
/* Make room in FDT for changes from the overlay */
ret = fdt_increase_size(spl_image->fdt_addr,
image_info.size);
if (ret < 0)
break;
ret = fdt_overlay_apply_verbose(spl_image->fdt_addr,
(void *)image_info.load_addr);
if (ret) {
pr_err("failed to apply DT overlay %s\n",
fit_get_name(ctx->fit, node, NULL));
break;
}
debug("%s: DT overlay %s applied\n", __func__,
fit_get_name(ctx->fit, node, NULL));
}
free(tmpbuffer);
if (ret)
return ret;
}
/* Try to make space, so we can inject details on the loadables */
ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);
if (ret < 0)
return ret;
return ret;
}
static int spl_fit_record_loadable(const struct spl_fit_info *ctx, int index,
void *blob, struct spl_image_info *image)
{
int ret = 0;
const char *name;
int node;
if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
return 0;
ret = spl_fit_get_image_name(ctx, "loadables", index, &name);
if (ret < 0)
return ret;
node = spl_fit_get_image_node(ctx, "loadables", index);
ret = fdt_record_loadable(blob, index, name, image->load_addr,
image->size, image->entry_point,
fdt_getprop(ctx->fit, node, "type", NULL),
fdt_getprop(ctx->fit, node, "os", NULL),
fdt_getprop(ctx->fit, node, "arch", NULL));
return ret;
}
static int spl_fit_image_is_fpga(const void *fit, int node)
{
const char *type;
if (!IS_ENABLED(CONFIG_SPL_FPGA))
return 0;
type = fdt_getprop(fit, node, FIT_TYPE_PROP, NULL);
if (!type)
return 0;
return !strcmp(type, "fpga");
}
static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os)
{
if (!CONFIG_IS_ENABLED(FIT_IMAGE_TINY) || CONFIG_IS_ENABLED(OS_BOOT))
return fit_image_get_os(fit, noffset, os);
const char *name = fdt_getprop(fit, noffset, FIT_OS_PROP, NULL);
if (!name)
return -ENOENT;
/*
* We don't care what the type of the image actually is,
* only whether or not it is U-Boot. This saves some
* space by omitting the large table of OS types.
*/
if (!strcmp(name, "u-boot"))
*os = IH_OS_U_BOOT;
else
*os = IH_OS_INVALID;
return 0;
}
/*
* The purpose of the FIT load buffer is to provide a memory location that is
* independent of the load address of any FIT component.
*/
static void *spl_get_fit_load_buffer(size_t size)
{
void *buf;
buf = malloc_cache_aligned(size);
if (!buf) {
pr_err("Could not get FIT buffer of %lu bytes\n", (ulong)size);
pr_err("\tcheck CONFIG_SYS_SPL_MALLOC_SIZE\n");
buf = spl_get_load_buffer(0, size);
}
return buf;
}
__weak void *board_spl_fit_buffer_addr(ulong fit_size, int sectors, int bl_len)
{
return spl_get_fit_load_buffer(sectors * bl_len);
}
/*
* Weak default function to allow customizing SPL fit loading for load-only
* use cases by allowing to skip the parsing/processing of the FIT contents
* (so that this can be done separately in a more customized fashion)
*/
__weak bool spl_load_simple_fit_skip_processing(void)
{
return false;
}
/*
* Weak default function to allow fixes after fit header
* is loaded.
*/
__weak void *spl_load_simple_fit_fix_load(const void *fit)
{
return (void *)fit;
}
static void warn_deprecated(const char *msg)
{
printf("DEPRECATED: %s\n", msg);
printf("\tSee doc/uImage.FIT/source_file_format.txt\n");
}
static int spl_fit_upload_fpga(struct spl_fit_info *ctx, int node,
struct spl_image_info *fpga_image)
{
const char *compatible;
int ret;
int devnum = 0;
int flags = 0;
debug("FPGA bitstream at: %x, size: %x\n",
(u32)fpga_image->load_addr, fpga_image->size);
compatible = fdt_getprop(ctx->fit, node, "compatible", NULL);
if (!compatible) {
warn_deprecated("'fpga' image without 'compatible' property");
} else {
if (CONFIG_IS_ENABLED(FPGA_LOAD_SECURE))
flags = fpga_compatible2flag(devnum, compatible);
if (strcmp(compatible, "u-boot,fpga-legacy"))
debug("Ignoring compatible = %s property\n",
compatible);
}
ret = fpga_load(devnum, (void *)fpga_image->load_addr,
fpga_image->size, BIT_FULL, flags);
if (ret) {
printf("%s: Cannot load the image to the FPGA\n", __func__);
return ret;
}
puts("FPGA image loaded from FIT\n");
return 0;
}
static int spl_fit_load_fpga(struct spl_fit_info *ctx,
struct spl_load_info *info, ulong sector)
{
int node, ret;
struct spl_image_info fpga_image = {
.load_addr = 0,
};
node = spl_fit_get_image_node(ctx, "fpga", 0);
if (node < 0)
return node;
warn_deprecated("'fpga' property in config node. Use 'loadables'");
/* Load the image and set up the fpga_image structure */
ret = spl_load_fit_image(info, sector, ctx, node, &fpga_image);
if (ret) {
printf("%s: Cannot load the FPGA: %i\n", __func__, ret);
return ret;
}
return spl_fit_upload_fpga(ctx, node, &fpga_image);
}
static int spl_simple_fit_read(struct spl_fit_info *ctx,
struct spl_load_info *info, ulong sector,
const void *fit_header)
{
unsigned long count, size;
int sectors;
void *buf;
/*
* For FIT with external data, figure out where the external images
* start. This is the base for the data-offset properties in each
* image.
*/
size = ALIGN(fdt_totalsize(fit_header), 4);
size = board_spl_fit_size_align(size);
ctx->ext_data_offset = ALIGN(size, 4);
/*
* So far we only have one block of data from the FIT. Read the entire
* thing, including that first block.
*
* For FIT with data embedded, data is loaded as part of FIT image.
* For FIT with external data, data is not loaded in this step.
*/
sectors = get_aligned_image_size(info, size, 0);
buf = board_spl_fit_buffer_addr(size, sectors, info->bl_len);
count = info->read(info, sector, sectors, buf);
ctx->fit = buf;
debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu, size=0x%lx\n",
sector, sectors, buf, count, size);
return (count == 0) ? -EIO : 0;
}
static int spl_simple_fit_parse(struct spl_fit_info *ctx)
{
/* Find the correct subnode under "/configurations" */
ctx->conf_node = fit_find_config_node(ctx->fit);
if (ctx->conf_node < 0)
return -EINVAL;
if (IS_ENABLED(CONFIG_SPL_FIT_SIGNATURE)) {
printf("## Checking hash(es) for config %s ... ",
fit_get_name(ctx->fit, ctx->conf_node, NULL));
if (fit_config_verify(ctx->fit, ctx->conf_node))
return -EPERM;
puts("OK\n");
}
/* find the node holding the images information */
ctx->images_node = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
if (ctx->images_node < 0) {
debug("%s: Cannot find /images node: %d\n", __func__,
ctx->images_node);
return -EINVAL;
}
return 0;
}
int spl_load_simple_fit(struct spl_image_info *spl_image,
struct spl_load_info *info, ulong sector, void *fit)
{
struct spl_image_info image_info;
struct spl_fit_info ctx;
int node = -1;
int ret;
int index = 0;
int firmware_node;
ret = spl_simple_fit_read(&ctx, info, sector, fit);
if (ret < 0)
return ret;
/* skip further processing if requested to enable load-only use cases */
if (spl_load_simple_fit_skip_processing())
return 0;
ctx.fit = spl_load_simple_fit_fix_load(ctx.fit);
ret = spl_simple_fit_parse(&ctx);
if (ret < 0)
return ret;
if (IS_ENABLED(CONFIG_SPL_FPGA))
spl_fit_load_fpga(&ctx, info, sector);
/*
* Find the U-Boot image using the following search order:
* - start at 'firmware' (e.g. an ARM Trusted Firmware)
* - fall back 'kernel' (e.g. a Falcon-mode OS boot
* - fall back to using the first 'loadables' entry
*/
if (node < 0)
node = spl_fit_get_image_node(&ctx, FIT_FIRMWARE_PROP, 0);
if (node < 0 && IS_ENABLED(CONFIG_SPL_OS_BOOT))
node = spl_fit_get_image_node(&ctx, FIT_KERNEL_PROP, 0);
if (node < 0) {
debug("could not find firmware image, trying loadables...\n");
node = spl_fit_get_image_node(&ctx, "loadables", 0);
/*
* If we pick the U-Boot image from "loadables", start at
* the second image when later loading additional images.
*/
index = 1;
}
if (node < 0) {
debug("%s: Cannot find u-boot image node: %d\n",
__func__, node);
return -1;
}
/* Load the image and set up the spl_image structure */
ret = spl_load_fit_image(info, sector, &ctx, node, spl_image);
if (ret)
return ret;
/*
* For backward compatibility, we treat the first node that is
* as a U-Boot image, if no OS-type has been declared.
*/
if (!spl_fit_image_get_os(ctx.fit, node, &spl_image->os))
debug("Image OS is %s\n", genimg_get_os_name(spl_image->os));
else if (!IS_ENABLED(CONFIG_SPL_OS_BOOT))
spl_image->os = IH_OS_U_BOOT;
/*
* Booting a next-stage U-Boot may require us to append the FDT.
* We allow this to fail, as the U-Boot image might embed its FDT.
*/
if (os_takes_devicetree(spl_image->os)) {
ret = spl_fit_append_fdt(spl_image, info, sector, &ctx);
if (ret < 0 && spl_image->os != IH_OS_U_BOOT)
return ret;
}
firmware_node = node;
/* Now check if there are more images for us to load */
for (; ; index++) {
uint8_t os_type = IH_OS_INVALID;
node = spl_fit_get_image_node(&ctx, "loadables", index);
if (node < 0)
break;
/*
* if the firmware is also a loadable, skip it because
* it already has been loaded. This is typically the case with
* u-boot.img generated by mkimage.
*/
if (firmware_node == node)
continue;
image_info.load_addr = 0;
ret = spl_load_fit_image(info, sector, &ctx, node, &image_info);
if (ret < 0) {
printf("%s: can't load image loadables index %d (ret = %d)\n",
__func__, index, ret);
return ret;
}
if (spl_fit_image_is_fpga(ctx.fit, node))
spl_fit_upload_fpga(&ctx, node, &image_info);
if (!spl_fit_image_get_os(ctx.fit, node, &os_type))
debug("Loadable is %s\n", genimg_get_os_name(os_type));
if (os_takes_devicetree(os_type)) {
spl_fit_append_fdt(&image_info, info, sector, &ctx);
spl_image->fdt_addr = image_info.fdt_addr;
}
/*
* If the "firmware" image did not provide an entry point,
* use the first valid entry point from the loadables.
*/
if (spl_image->entry_point == FDT_ERROR &&
image_info.entry_point != FDT_ERROR)
spl_image->entry_point = image_info.entry_point;
/* Record our loadables into the FDT */
if (spl_image->fdt_addr)
spl_fit_record_loadable(&ctx, index,
spl_image->fdt_addr,
&image_info);
}
/*
* If a platform does not provide CONFIG_SYS_UBOOT_START, U-Boot's
* Makefile will set it to 0 and it will end up as the entry point
* here. What it actually means is: use the load address.
*/
if (spl_image->entry_point == FDT_ERROR || spl_image->entry_point == 0)
spl_image->entry_point = spl_image->load_addr;
spl_image->flags |= SPL_FIT_FOUND;
if (IS_ENABLED(CONFIG_IMX_HAB))
board_spl_fit_post_load(ctx.fit);
return 0;
}