From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/drivers/base/firmware_loader/fallback.c | 122 +++++++++++++---------------------------
1 files changed, 39 insertions(+), 83 deletions(-)
diff --git a/kernel/drivers/base/firmware_loader/fallback.c b/kernel/drivers/base/firmware_loader/fallback.c
index 821e27b..0fdd18c 100644
--- a/kernel/drivers/base/firmware_loader/fallback.c
+++ b/kernel/drivers/base/firmware_loader/fallback.c
@@ -9,6 +9,7 @@
#include <linux/umh.h>
#include <linux/sysctl.h>
#include <linux/vmalloc.h>
+#include <linux/module.h>
#include "fallback.h"
#include "firmware.h"
@@ -16,6 +17,8 @@
/*
* firmware fallback mechanism
*/
+
+MODULE_IMPORT_NS(FIRMWARE_LOADER_PRIVATE);
extern struct firmware_fallback_config fw_fallback_config;
@@ -120,7 +123,7 @@
static ssize_t timeout_show(struct class *class, struct class_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", __firmware_loading_timeout());
+ return sysfs_emit(buf, "%d\n", __firmware_loading_timeout());
}
/**
@@ -215,21 +218,7 @@
loading = fw_sysfs_loading(fw_sysfs->fw_priv);
mutex_unlock(&fw_lock);
- return sprintf(buf, "%d\n", loading);
-}
-
-/* one pages buffer should be mapped/unmapped only once */
-static int map_fw_priv_pages(struct fw_priv *fw_priv)
-{
- if (!fw_priv->is_paged_buf)
- return 0;
-
- vunmap(fw_priv->data);
- fw_priv->data = vmap(fw_priv->pages, fw_priv->nr_pages, 0,
- PAGE_KERNEL_RO);
- if (!fw_priv->data)
- return -ENOMEM;
- return 0;
+ return sysfs_emit(buf, "%d\n", loading);
}
/**
@@ -253,7 +242,6 @@
struct fw_priv *fw_priv;
ssize_t written = count;
int loading = simple_strtol(buf, NULL, 10);
- int i;
mutex_lock(&fw_lock);
fw_priv = fw_sysfs->fw_priv;
@@ -264,12 +252,7 @@
case 1:
/* discarding any previous partial load */
if (!fw_sysfs_done(fw_priv)) {
- for (i = 0; i < fw_priv->nr_pages; i++)
- __free_page(fw_priv->pages[i]);
- vfree(fw_priv->pages);
- fw_priv->pages = NULL;
- fw_priv->page_array_size = 0;
- fw_priv->nr_pages = 0;
+ fw_free_paged_buf(fw_priv);
fw_state_start(fw_priv);
}
break;
@@ -283,14 +266,14 @@
* see the mapped 'buf->data' once the loading
* is completed.
* */
- rc = map_fw_priv_pages(fw_priv);
+ rc = fw_map_paged_buf(fw_priv);
if (rc)
dev_err(dev, "%s: map pages failed\n",
__func__);
else
- rc = security_kernel_post_read_file(NULL,
- fw_priv->data, fw_priv->size,
- READING_FIRMWARE);
+ rc = security_kernel_post_load_data(fw_priv->data,
+ fw_priv->size,
+ LOADING_FIRMWARE, "blob");
/*
* Same logic as fw_load_abort, only the DONE bit
@@ -304,10 +287,10 @@
}
break;
}
- /* fallthrough */
+ fallthrough;
default:
dev_err(dev, "%s: unexpected value (%d)\n", __func__, loading);
- /* fallthrough */
+ fallthrough;
case -1:
fw_load_abort(fw_sysfs);
break;
@@ -387,40 +370,13 @@
static int fw_realloc_pages(struct fw_sysfs *fw_sysfs, int min_size)
{
- struct fw_priv *fw_priv= fw_sysfs->fw_priv;
- int pages_needed = PAGE_ALIGN(min_size) >> PAGE_SHIFT;
+ int err;
- /* If the array of pages is too small, grow it... */
- if (fw_priv->page_array_size < pages_needed) {
- int new_array_size = max(pages_needed,
- fw_priv->page_array_size * 2);
- struct page **new_pages;
-
- new_pages = vmalloc(array_size(new_array_size, sizeof(void *)));
- if (!new_pages) {
- fw_load_abort(fw_sysfs);
- return -ENOMEM;
- }
- memcpy(new_pages, fw_priv->pages,
- fw_priv->page_array_size * sizeof(void *));
- memset(&new_pages[fw_priv->page_array_size], 0, sizeof(void *) *
- (new_array_size - fw_priv->page_array_size));
- vfree(fw_priv->pages);
- fw_priv->pages = new_pages;
- fw_priv->page_array_size = new_array_size;
- }
-
- while (fw_priv->nr_pages < pages_needed) {
- fw_priv->pages[fw_priv->nr_pages] =
- alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
-
- if (!fw_priv->pages[fw_priv->nr_pages]) {
- fw_load_abort(fw_sysfs);
- return -ENOMEM;
- }
- fw_priv->nr_pages++;
- }
- return 0;
+ err = fw_grow_paged_buf(fw_sysfs->fw_priv,
+ PAGE_ALIGN(min_size) >> PAGE_SHIFT);
+ if (err)
+ fw_load_abort(fw_sysfs);
+ return err;
}
/**
@@ -505,7 +461,7 @@
static struct fw_sysfs *
fw_create_instance(struct firmware *firmware, const char *fw_name,
- struct device *device, enum fw_opt opt_flags)
+ struct device *device, u32 opt_flags)
{
struct fw_sysfs *fw_sysfs;
struct device *f_dev;
@@ -532,13 +488,11 @@
/**
* fw_load_sysfs_fallback() - load a firmware via the sysfs fallback mechanism
* @fw_sysfs: firmware sysfs information for the firmware to load
- * @opt_flags: flags of options, FW_OPT_*
* @timeout: timeout to wait for the load
*
* In charge of constructing a sysfs fallback interface for firmware loading.
**/
-static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs,
- enum fw_opt opt_flags, long timeout)
+static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, long timeout)
{
int retval = 0;
struct device *f_dev = &fw_sysfs->dev;
@@ -565,7 +519,7 @@
list_add(&fw_priv->pending_list, &pending_fw_head);
mutex_unlock(&fw_lock);
- if (opt_flags & FW_OPT_UEVENT) {
+ if (fw_priv->opt_flags & FW_OPT_UEVENT) {
fw_priv->need_uevent = true;
dev_set_uevent_suppress(f_dev, false);
dev_dbg(f_dev, "firmware: requesting %s\n", fw_priv->fw_name);
@@ -596,7 +550,7 @@
static int fw_load_from_user_helper(struct firmware *firmware,
const char *name, struct device *device,
- enum fw_opt opt_flags)
+ u32 opt_flags)
{
struct fw_sysfs *fw_sysfs;
long timeout;
@@ -626,10 +580,10 @@
}
fw_sysfs->fw_priv = firmware->priv;
- ret = fw_load_sysfs_fallback(fw_sysfs, opt_flags, timeout);
+ ret = fw_load_sysfs_fallback(fw_sysfs, timeout);
if (!ret)
- ret = assign_fw(firmware, device, opt_flags);
+ ret = assign_fw(firmware, device);
out_unlock:
usermodehelper_read_unlock();
@@ -637,7 +591,7 @@
return ret;
}
-static bool fw_force_sysfs_fallback(enum fw_opt opt_flags)
+static bool fw_force_sysfs_fallback(u32 opt_flags)
{
if (fw_fallback_config.force_sysfs_fallback)
return true;
@@ -646,7 +600,7 @@
return true;
}
-static bool fw_run_sysfs_fallback(enum fw_opt opt_flags)
+static bool fw_run_sysfs_fallback(u32 opt_flags)
{
int ret;
@@ -655,11 +609,11 @@
return false;
}
- if ((opt_flags & FW_OPT_NOFALLBACK))
+ if ((opt_flags & FW_OPT_NOFALLBACK_SYSFS))
return false;
/* Also permit LSMs and IMA to fail firmware sysfs fallback */
- ret = security_kernel_load_data(LOADING_FIRMWARE);
+ ret = security_kernel_load_data(LOADING_FIRMWARE, true);
if (ret < 0)
return false;
@@ -671,31 +625,33 @@
* @fw: pointer to firmware image
* @name: name of firmware file to look for
* @device: device for which firmware is being loaded
- * @opt_flags: options to control firmware loading behaviour
+ * @opt_flags: options to control firmware loading behaviour, as defined by
+ * &enum fw_opt
* @ret: return value from direct lookup which triggered the fallback mechanism
*
* This function is called if direct lookup for the firmware failed, it enables
* a fallback mechanism through userspace by exposing a sysfs loading
- * interface. Userspace is in charge of loading the firmware through the syfs
- * loading interface. This syfs fallback mechanism may be disabled completely
+ * interface. Userspace is in charge of loading the firmware through the sysfs
+ * loading interface. This sysfs fallback mechanism may be disabled completely
* on a system by setting the proc sysctl value ignore_sysfs_fallback to true.
- * If this false we check if the internal API caller set the @FW_OPT_NOFALLBACK
- * flag, if so it would also disable the fallback mechanism. A system may want
- * to enfoce the sysfs fallback mechanism at all times, it can do this by
- * setting ignore_sysfs_fallback to false and force_sysfs_fallback to true.
+ * If this is false we check if the internal API caller set the
+ * @FW_OPT_NOFALLBACK_SYSFS flag, if so it would also disable the fallback
+ * mechanism. A system may want to enforce the sysfs fallback mechanism at all
+ * times, it can do this by setting ignore_sysfs_fallback to false and
+ * force_sysfs_fallback to true.
* Enabling force_sysfs_fallback is functionally equivalent to build a kernel
* with CONFIG_FW_LOADER_USER_HELPER_FALLBACK.
**/
int firmware_fallback_sysfs(struct firmware *fw, const char *name,
struct device *device,
- enum fw_opt opt_flags,
+ u32 opt_flags,
int ret)
{
if (!fw_run_sysfs_fallback(opt_flags))
return ret;
if (!(opt_flags & FW_OPT_NO_WARN))
- dev_warn(device, "Falling back to syfs fallback for: %s\n",
+ dev_warn(device, "Falling back to sysfs fallback for: %s\n",
name);
else
dev_dbg(device, "Falling back to sysfs fallback for: %s\n",
--
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