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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /lib/test_firmware.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/test_firmware.c')
-rw-r--r--lib/test_firmware.c1569
1 files changed, 1569 insertions, 0 deletions
diff --git a/lib/test_firmware.c b/lib/test_firmware.c
new file mode 100644
index 0000000000..add4699fc6
--- /dev/null
+++ b/lib/test_firmware.c
@@ -0,0 +1,1569 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This module provides an interface to trigger and test firmware loading.
+ *
+ * It is designed to be used for basic evaluation of the firmware loading
+ * subsystem (for example when validating firmware verification). It lacks
+ * any extra dependencies, and will not normally be loaded by the system
+ * unless explicitly requested by name.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/completion.h>
+#include <linux/firmware.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/kstrtox.h>
+#include <linux/kthread.h>
+#include <linux/vmalloc.h>
+#include <linux/efi_embedded_fw.h>
+
+MODULE_IMPORT_NS(TEST_FIRMWARE);
+
+#define TEST_FIRMWARE_NAME "test-firmware.bin"
+#define TEST_FIRMWARE_NUM_REQS 4
+#define TEST_FIRMWARE_BUF_SIZE SZ_1K
+#define TEST_UPLOAD_MAX_SIZE SZ_2K
+#define TEST_UPLOAD_BLK_SIZE 37 /* Avoid powers of two in testing */
+
+static DEFINE_MUTEX(test_fw_mutex);
+static const struct firmware *test_firmware;
+static LIST_HEAD(test_upload_list);
+
+struct test_batched_req {
+ u8 idx;
+ int rc;
+ bool sent;
+ const struct firmware *fw;
+ const char *name;
+ const char *fw_buf;
+ struct completion completion;
+ struct task_struct *task;
+ struct device *dev;
+};
+
+/**
+ * struct test_config - represents configuration for the test for different triggers
+ *
+ * @name: the name of the firmware file to look for
+ * @into_buf: when the into_buf is used if this is true
+ * request_firmware_into_buf() will be used instead.
+ * @buf_size: size of buf to allocate when into_buf is true
+ * @file_offset: file offset to request when calling request_firmware_into_buf
+ * @partial: partial read opt when calling request_firmware_into_buf
+ * @sync_direct: when the sync trigger is used if this is true
+ * request_firmware_direct() will be used instead.
+ * @send_uevent: whether or not to send a uevent for async requests
+ * @num_requests: number of requests to try per test case. This is trigger
+ * specific.
+ * @reqs: stores all requests information
+ * @read_fw_idx: index of thread from which we want to read firmware results
+ * from through the read_fw trigger.
+ * @upload_name: firmware name to be used with upload_read sysfs node
+ * @test_result: a test may use this to collect the result from the call
+ * of the request_firmware*() calls used in their tests. In order of
+ * priority we always keep first any setup error. If no setup errors were
+ * found then we move on to the first error encountered while running the
+ * API. Note that for async calls this typically will be a successful
+ * result (0) unless of course you've used bogus parameters, or the system
+ * is out of memory. In the async case the callback is expected to do a
+ * bit more homework to figure out what happened, unfortunately the only
+ * information passed today on error is the fact that no firmware was
+ * found so we can only assume -ENOENT on async calls if the firmware is
+ * NULL.
+ *
+ * Errors you can expect:
+ *
+ * API specific:
+ *
+ * 0: success for sync, for async it means request was sent
+ * -EINVAL: invalid parameters or request
+ * -ENOENT: files not found
+ *
+ * System environment:
+ *
+ * -ENOMEM: memory pressure on system
+ * -ENODEV: out of number of devices to test
+ * -EINVAL: an unexpected error has occurred
+ * @req_firmware: if @sync_direct is true this is set to
+ * request_firmware_direct(), otherwise request_firmware()
+ */
+struct test_config {
+ char *name;
+ bool into_buf;
+ size_t buf_size;
+ size_t file_offset;
+ bool partial;
+ bool sync_direct;
+ bool send_uevent;
+ u8 num_requests;
+ u8 read_fw_idx;
+ char *upload_name;
+
+ /*
+ * These below don't belong her but we'll move them once we create
+ * a struct fw_test_device and stuff the misc_dev under there later.
+ */
+ struct test_batched_req *reqs;
+ int test_result;
+ int (*req_firmware)(const struct firmware **fw, const char *name,
+ struct device *device);
+};
+
+struct upload_inject_err {
+ const char *prog;
+ enum fw_upload_err err_code;
+};
+
+struct test_firmware_upload {
+ char *name;
+ struct list_head node;
+ char *buf;
+ size_t size;
+ bool cancel_request;
+ struct upload_inject_err inject;
+ struct fw_upload *fwl;
+};
+
+static struct test_config *test_fw_config;
+
+static struct test_firmware_upload *upload_lookup_name(const char *name)
+{
+ struct test_firmware_upload *tst;
+
+ list_for_each_entry(tst, &test_upload_list, node)
+ if (strncmp(name, tst->name, strlen(tst->name)) == 0)
+ return tst;
+
+ return NULL;
+}
+
+static ssize_t test_fw_misc_read(struct file *f, char __user *buf,
+ size_t size, loff_t *offset)
+{
+ ssize_t rc = 0;
+
+ mutex_lock(&test_fw_mutex);
+ if (test_firmware)
+ rc = simple_read_from_buffer(buf, size, offset,
+ test_firmware->data,
+ test_firmware->size);
+ mutex_unlock(&test_fw_mutex);
+ return rc;
+}
+
+static const struct file_operations test_fw_fops = {
+ .owner = THIS_MODULE,
+ .read = test_fw_misc_read,
+};
+
+static void __test_release_all_firmware(void)
+{
+ struct test_batched_req *req;
+ u8 i;
+
+ if (!test_fw_config->reqs)
+ return;
+
+ for (i = 0; i < test_fw_config->num_requests; i++) {
+ req = &test_fw_config->reqs[i];
+ if (req->fw) {
+ if (req->fw_buf) {
+ kfree_const(req->fw_buf);
+ req->fw_buf = NULL;
+ }
+ release_firmware(req->fw);
+ req->fw = NULL;
+ }
+ }
+
+ vfree(test_fw_config->reqs);
+ test_fw_config->reqs = NULL;
+}
+
+static void test_release_all_firmware(void)
+{
+ mutex_lock(&test_fw_mutex);
+ __test_release_all_firmware();
+ mutex_unlock(&test_fw_mutex);
+}
+
+
+static void __test_firmware_config_free(void)
+{
+ __test_release_all_firmware();
+ kfree_const(test_fw_config->name);
+ test_fw_config->name = NULL;
+}
+
+/*
+ * XXX: move to kstrncpy() once merged.
+ *
+ * Users should use kfree_const() when freeing these.
+ */
+static int __kstrncpy(char **dst, const char *name, size_t count, gfp_t gfp)
+{
+ *dst = kstrndup(name, count, gfp);
+ if (!*dst)
+ return -ENOMEM;
+ return count;
+}
+
+static int __test_firmware_config_init(void)
+{
+ int ret;
+
+ ret = __kstrncpy(&test_fw_config->name, TEST_FIRMWARE_NAME,
+ strlen(TEST_FIRMWARE_NAME), GFP_KERNEL);
+ if (ret < 0)
+ goto out;
+
+ test_fw_config->num_requests = TEST_FIRMWARE_NUM_REQS;
+ test_fw_config->send_uevent = true;
+ test_fw_config->into_buf = false;
+ test_fw_config->buf_size = TEST_FIRMWARE_BUF_SIZE;
+ test_fw_config->file_offset = 0;
+ test_fw_config->partial = false;
+ test_fw_config->sync_direct = false;
+ test_fw_config->req_firmware = request_firmware;
+ test_fw_config->test_result = 0;
+ test_fw_config->reqs = NULL;
+ test_fw_config->upload_name = NULL;
+
+ return 0;
+
+out:
+ __test_firmware_config_free();
+ return ret;
+}
+
+static ssize_t reset_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ mutex_lock(&test_fw_mutex);
+
+ __test_firmware_config_free();
+
+ ret = __test_firmware_config_init();
+ if (ret < 0) {
+ ret = -ENOMEM;
+ pr_err("could not alloc settings for config trigger: %d\n",
+ ret);
+ goto out;
+ }
+
+ pr_info("reset\n");
+ ret = count;
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return ret;
+}
+static DEVICE_ATTR_WO(reset);
+
+static ssize_t config_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int len = 0;
+
+ mutex_lock(&test_fw_mutex);
+
+ len += scnprintf(buf, PAGE_SIZE - len,
+ "Custom trigger configuration for: %s\n",
+ dev_name(dev));
+
+ if (test_fw_config->name)
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "name:\t%s\n",
+ test_fw_config->name);
+ else
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "name:\tEMPTY\n");
+
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "num_requests:\t%u\n", test_fw_config->num_requests);
+
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "send_uevent:\t\t%s\n",
+ test_fw_config->send_uevent ?
+ "FW_ACTION_UEVENT" :
+ "FW_ACTION_NOUEVENT");
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "into_buf:\t\t%s\n",
+ test_fw_config->into_buf ? "true" : "false");
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "buf_size:\t%zu\n", test_fw_config->buf_size);
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "file_offset:\t%zu\n", test_fw_config->file_offset);
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "partial:\t\t%s\n",
+ test_fw_config->partial ? "true" : "false");
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "sync_direct:\t\t%s\n",
+ test_fw_config->sync_direct ? "true" : "false");
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "read_fw_idx:\t%u\n", test_fw_config->read_fw_idx);
+ if (test_fw_config->upload_name)
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "upload_name:\t%s\n",
+ test_fw_config->upload_name);
+ else
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "upload_name:\tEMPTY\n");
+
+ mutex_unlock(&test_fw_mutex);
+
+ return len;
+}
+static DEVICE_ATTR_RO(config);
+
+static ssize_t config_name_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ mutex_lock(&test_fw_mutex);
+ kfree_const(test_fw_config->name);
+ ret = __kstrncpy(&test_fw_config->name, buf, count, GFP_KERNEL);
+ mutex_unlock(&test_fw_mutex);
+
+ return ret;
+}
+
+/*
+ * As per sysfs_kf_seq_show() the buf is max PAGE_SIZE.
+ */
+static ssize_t config_test_show_str(char *dst,
+ char *src)
+{
+ int len;
+
+ mutex_lock(&test_fw_mutex);
+ len = snprintf(dst, PAGE_SIZE, "%s\n", src);
+ mutex_unlock(&test_fw_mutex);
+
+ return len;
+}
+
+static inline int __test_dev_config_update_bool(const char *buf, size_t size,
+ bool *cfg)
+{
+ int ret;
+
+ if (kstrtobool(buf, cfg) < 0)
+ ret = -EINVAL;
+ else
+ ret = size;
+
+ return ret;
+}
+
+static int test_dev_config_update_bool(const char *buf, size_t size,
+ bool *cfg)
+{
+ int ret;
+
+ mutex_lock(&test_fw_mutex);
+ ret = __test_dev_config_update_bool(buf, size, cfg);
+ mutex_unlock(&test_fw_mutex);
+
+ return ret;
+}
+
+static ssize_t test_dev_config_show_bool(char *buf, bool val)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static int __test_dev_config_update_size_t(
+ const char *buf,
+ size_t size,
+ size_t *cfg)
+{
+ int ret;
+ long new;
+
+ ret = kstrtol(buf, 10, &new);
+ if (ret)
+ return ret;
+
+ *(size_t *)cfg = new;
+
+ /* Always return full write size even if we didn't consume all */
+ return size;
+}
+
+static ssize_t test_dev_config_show_size_t(char *buf, size_t val)
+{
+ return snprintf(buf, PAGE_SIZE, "%zu\n", val);
+}
+
+static ssize_t test_dev_config_show_int(char *buf, int val)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static int __test_dev_config_update_u8(const char *buf, size_t size, u8 *cfg)
+{
+ u8 val;
+ int ret;
+
+ ret = kstrtou8(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ *(u8 *)cfg = val;
+
+ /* Always return full write size even if we didn't consume all */
+ return size;
+}
+
+static int test_dev_config_update_u8(const char *buf, size_t size, u8 *cfg)
+{
+ int ret;
+
+ mutex_lock(&test_fw_mutex);
+ ret = __test_dev_config_update_u8(buf, size, cfg);
+ mutex_unlock(&test_fw_mutex);
+
+ return ret;
+}
+
+static ssize_t test_dev_config_show_u8(char *buf, u8 val)
+{
+ return snprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static ssize_t config_name_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return config_test_show_str(buf, test_fw_config->name);
+}
+static DEVICE_ATTR_RW(config_name);
+
+static ssize_t config_upload_name_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct test_firmware_upload *tst;
+ int ret = count;
+
+ mutex_lock(&test_fw_mutex);
+ tst = upload_lookup_name(buf);
+ if (tst)
+ test_fw_config->upload_name = tst->name;
+ else
+ ret = -EINVAL;
+ mutex_unlock(&test_fw_mutex);
+
+ return ret;
+}
+
+static ssize_t config_upload_name_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return config_test_show_str(buf, test_fw_config->upload_name);
+}
+static DEVICE_ATTR_RW(config_upload_name);
+
+static ssize_t config_num_requests_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+
+ mutex_lock(&test_fw_mutex);
+ if (test_fw_config->reqs) {
+ pr_err("Must call release_all_firmware prior to changing config\n");
+ rc = -EINVAL;
+ mutex_unlock(&test_fw_mutex);
+ goto out;
+ }
+
+ rc = __test_dev_config_update_u8(buf, count,
+ &test_fw_config->num_requests);
+ mutex_unlock(&test_fw_mutex);
+
+out:
+ return rc;
+}
+
+static ssize_t config_num_requests_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_u8(buf, test_fw_config->num_requests);
+}
+static DEVICE_ATTR_RW(config_num_requests);
+
+static ssize_t config_into_buf_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return test_dev_config_update_bool(buf,
+ count,
+ &test_fw_config->into_buf);
+}
+
+static ssize_t config_into_buf_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_bool(buf, test_fw_config->into_buf);
+}
+static DEVICE_ATTR_RW(config_into_buf);
+
+static ssize_t config_buf_size_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+
+ mutex_lock(&test_fw_mutex);
+ if (test_fw_config->reqs) {
+ pr_err("Must call release_all_firmware prior to changing config\n");
+ rc = -EINVAL;
+ mutex_unlock(&test_fw_mutex);
+ goto out;
+ }
+
+ rc = __test_dev_config_update_size_t(buf, count,
+ &test_fw_config->buf_size);
+ mutex_unlock(&test_fw_mutex);
+
+out:
+ return rc;
+}
+
+static ssize_t config_buf_size_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_size_t(buf, test_fw_config->buf_size);
+}
+static DEVICE_ATTR_RW(config_buf_size);
+
+static ssize_t config_file_offset_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+
+ mutex_lock(&test_fw_mutex);
+ if (test_fw_config->reqs) {
+ pr_err("Must call release_all_firmware prior to changing config\n");
+ rc = -EINVAL;
+ mutex_unlock(&test_fw_mutex);
+ goto out;
+ }
+
+ rc = __test_dev_config_update_size_t(buf, count,
+ &test_fw_config->file_offset);
+ mutex_unlock(&test_fw_mutex);
+
+out:
+ return rc;
+}
+
+static ssize_t config_file_offset_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_size_t(buf, test_fw_config->file_offset);
+}
+static DEVICE_ATTR_RW(config_file_offset);
+
+static ssize_t config_partial_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return test_dev_config_update_bool(buf,
+ count,
+ &test_fw_config->partial);
+}
+
+static ssize_t config_partial_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_bool(buf, test_fw_config->partial);
+}
+static DEVICE_ATTR_RW(config_partial);
+
+static ssize_t config_sync_direct_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc = test_dev_config_update_bool(buf, count,
+ &test_fw_config->sync_direct);
+
+ if (rc == count)
+ test_fw_config->req_firmware = test_fw_config->sync_direct ?
+ request_firmware_direct :
+ request_firmware;
+ return rc;
+}
+
+static ssize_t config_sync_direct_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_bool(buf, test_fw_config->sync_direct);
+}
+static DEVICE_ATTR_RW(config_sync_direct);
+
+static ssize_t config_send_uevent_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return test_dev_config_update_bool(buf, count,
+ &test_fw_config->send_uevent);
+}
+
+static ssize_t config_send_uevent_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_bool(buf, test_fw_config->send_uevent);
+}
+static DEVICE_ATTR_RW(config_send_uevent);
+
+static ssize_t config_read_fw_idx_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return test_dev_config_update_u8(buf, count,
+ &test_fw_config->read_fw_idx);
+}
+
+static ssize_t config_read_fw_idx_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_u8(buf, test_fw_config->read_fw_idx);
+}
+static DEVICE_ATTR_RW(config_read_fw_idx);
+
+
+static ssize_t trigger_request_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+ char *name;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+
+ pr_info("loading '%s'\n", name);
+
+ mutex_lock(&test_fw_mutex);
+ release_firmware(test_firmware);
+ if (test_fw_config->reqs)
+ __test_release_all_firmware();
+ test_firmware = NULL;
+ rc = request_firmware(&test_firmware, name, dev);
+ if (rc) {
+ pr_info("load of '%s' failed: %d\n", name, rc);
+ goto out;
+ }
+ pr_info("loaded: %zu\n", test_firmware->size);
+ rc = count;
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ kfree(name);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_request);
+
+#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
+extern struct list_head efi_embedded_fw_list;
+extern bool efi_embedded_fw_checked;
+
+static ssize_t trigger_request_platform_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ static const u8 test_data[] = {
+ 0x55, 0xaa, 0x55, 0xaa, 0x01, 0x02, 0x03, 0x04,
+ 0x55, 0xaa, 0x55, 0xaa, 0x05, 0x06, 0x07, 0x08,
+ 0x55, 0xaa, 0x55, 0xaa, 0x10, 0x20, 0x30, 0x40,
+ 0x55, 0xaa, 0x55, 0xaa, 0x50, 0x60, 0x70, 0x80
+ };
+ struct efi_embedded_fw efi_embedded_fw;
+ const struct firmware *firmware = NULL;
+ bool saved_efi_embedded_fw_checked;
+ char *name;
+ int rc;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+
+ pr_info("inserting test platform fw '%s'\n", name);
+ efi_embedded_fw.name = name;
+ efi_embedded_fw.data = (void *)test_data;
+ efi_embedded_fw.length = sizeof(test_data);
+ list_add(&efi_embedded_fw.list, &efi_embedded_fw_list);
+ saved_efi_embedded_fw_checked = efi_embedded_fw_checked;
+ efi_embedded_fw_checked = true;
+
+ pr_info("loading '%s'\n", name);
+ rc = firmware_request_platform(&firmware, name, dev);
+ if (rc) {
+ pr_info("load of '%s' failed: %d\n", name, rc);
+ goto out;
+ }
+ if (firmware->size != sizeof(test_data) ||
+ memcmp(firmware->data, test_data, sizeof(test_data)) != 0) {
+ pr_info("firmware contents mismatch for '%s'\n", name);
+ rc = -EINVAL;
+ goto out;
+ }
+ pr_info("loaded: %zu\n", firmware->size);
+ rc = count;
+
+out:
+ efi_embedded_fw_checked = saved_efi_embedded_fw_checked;
+ release_firmware(firmware);
+ list_del(&efi_embedded_fw.list);
+ kfree(name);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_request_platform);
+#endif
+
+static DECLARE_COMPLETION(async_fw_done);
+
+static void trigger_async_request_cb(const struct firmware *fw, void *context)
+{
+ test_firmware = fw;
+ complete(&async_fw_done);
+}
+
+static ssize_t trigger_async_request_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+ char *name;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+
+ pr_info("loading '%s'\n", name);
+
+ mutex_lock(&test_fw_mutex);
+ release_firmware(test_firmware);
+ test_firmware = NULL;
+ if (test_fw_config->reqs)
+ __test_release_all_firmware();
+ rc = request_firmware_nowait(THIS_MODULE, 1, name, dev, GFP_KERNEL,
+ NULL, trigger_async_request_cb);
+ if (rc) {
+ pr_info("async load of '%s' failed: %d\n", name, rc);
+ kfree(name);
+ goto out;
+ }
+ /* Free 'name' ASAP, to test for race conditions */
+ kfree(name);
+
+ wait_for_completion(&async_fw_done);
+
+ if (test_firmware) {
+ pr_info("loaded: %zu\n", test_firmware->size);
+ rc = count;
+ } else {
+ pr_err("failed to async load firmware\n");
+ rc = -ENOMEM;
+ }
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_async_request);
+
+static ssize_t trigger_custom_fallback_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rc;
+ char *name;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+
+ pr_info("loading '%s' using custom fallback mechanism\n", name);
+
+ mutex_lock(&test_fw_mutex);
+ release_firmware(test_firmware);
+ if (test_fw_config->reqs)
+ __test_release_all_firmware();
+ test_firmware = NULL;
+ rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOUEVENT, name,
+ dev, GFP_KERNEL, NULL,
+ trigger_async_request_cb);
+ if (rc) {
+ pr_info("async load of '%s' failed: %d\n", name, rc);
+ kfree(name);
+ goto out;
+ }
+ /* Free 'name' ASAP, to test for race conditions */
+ kfree(name);
+
+ wait_for_completion(&async_fw_done);
+
+ if (test_firmware) {
+ pr_info("loaded: %zu\n", test_firmware->size);
+ rc = count;
+ } else {
+ pr_err("failed to async load firmware\n");
+ rc = -ENODEV;
+ }
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_custom_fallback);
+
+static int test_fw_run_batch_request(void *data)
+{
+ struct test_batched_req *req = data;
+
+ if (!req) {
+ test_fw_config->test_result = -EINVAL;
+ return -EINVAL;
+ }
+
+ if (test_fw_config->into_buf) {
+ void *test_buf;
+
+ test_buf = kzalloc(TEST_FIRMWARE_BUF_SIZE, GFP_KERNEL);
+ if (!test_buf)
+ return -ENOMEM;
+
+ if (test_fw_config->partial)
+ req->rc = request_partial_firmware_into_buf
+ (&req->fw,
+ req->name,
+ req->dev,
+ test_buf,
+ test_fw_config->buf_size,
+ test_fw_config->file_offset);
+ else
+ req->rc = request_firmware_into_buf
+ (&req->fw,
+ req->name,
+ req->dev,
+ test_buf,
+ test_fw_config->buf_size);
+ if (!req->fw)
+ kfree(test_buf);
+ else
+ req->fw_buf = test_buf;
+ } else {
+ req->rc = test_fw_config->req_firmware(&req->fw,
+ req->name,
+ req->dev);
+ }
+
+ if (req->rc) {
+ pr_info("#%u: batched sync load failed: %d\n",
+ req->idx, req->rc);
+ if (!test_fw_config->test_result)
+ test_fw_config->test_result = req->rc;
+ } else if (req->fw) {
+ req->sent = true;
+ pr_info("#%u: batched sync loaded %zu\n",
+ req->idx, req->fw->size);
+ }
+ complete(&req->completion);
+
+ req->task = NULL;
+
+ return 0;
+}
+
+/*
+ * We use a kthread as otherwise the kernel serializes all our sync requests
+ * and we would not be able to mimic batched requests on a sync call. Batched
+ * requests on a sync call can for instance happen on a device driver when
+ * multiple cards are used and firmware loading happens outside of probe.
+ */
+static ssize_t trigger_batched_requests_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct test_batched_req *req;
+ int rc;
+ u8 i;
+
+ mutex_lock(&test_fw_mutex);
+
+ if (test_fw_config->reqs) {
+ rc = -EBUSY;
+ goto out_bail;
+ }
+
+ test_fw_config->reqs =
+ vzalloc(array3_size(sizeof(struct test_batched_req),
+ test_fw_config->num_requests, 2));
+ if (!test_fw_config->reqs) {
+ rc = -ENOMEM;
+ goto out_unlock;
+ }
+
+ pr_info("batched sync firmware loading '%s' %u times\n",
+ test_fw_config->name, test_fw_config->num_requests);
+
+ for (i = 0; i < test_fw_config->num_requests; i++) {
+ req = &test_fw_config->reqs[i];
+ req->fw = NULL;
+ req->idx = i;
+ req->name = test_fw_config->name;
+ req->fw_buf = NULL;
+ req->dev = dev;
+ init_completion(&req->completion);
+ req->task = kthread_run(test_fw_run_batch_request, req,
+ "%s-%u", KBUILD_MODNAME, req->idx);
+ if (!req->task || IS_ERR(req->task)) {
+ pr_err("Setting up thread %u failed\n", req->idx);
+ req->task = NULL;
+ rc = -ENOMEM;
+ goto out_bail;
+ }
+ }
+
+ rc = count;
+
+ /*
+ * We require an explicit release to enable more time and delay of
+ * calling release_firmware() to improve our chances of forcing a
+ * batched request. If we instead called release_firmware() right away
+ * then we might miss on an opportunity of having a successful firmware
+ * request pass on the opportunity to be come a batched request.
+ */
+
+out_bail:
+ for (i = 0; i < test_fw_config->num_requests; i++) {
+ req = &test_fw_config->reqs[i];
+ if (req->task || req->sent)
+ wait_for_completion(&req->completion);
+ }
+
+ /* Override any worker error if we had a general setup error */
+ if (rc < 0)
+ test_fw_config->test_result = rc;
+
+out_unlock:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_batched_requests);
+
+/*
+ * We wait for each callback to return with the lock held, no need to lock here
+ */
+static void trigger_batched_cb(const struct firmware *fw, void *context)
+{
+ struct test_batched_req *req = context;
+
+ if (!req) {
+ test_fw_config->test_result = -EINVAL;
+ return;
+ }
+
+ /* forces *some* batched requests to queue up */
+ if (!req->idx)
+ ssleep(2);
+
+ req->fw = fw;
+
+ /*
+ * Unfortunately the firmware API gives us nothing other than a null FW
+ * if the firmware was not found on async requests. Best we can do is
+ * just assume -ENOENT. A better API would pass the actual return
+ * value to the callback.
+ */
+ if (!fw && !test_fw_config->test_result)
+ test_fw_config->test_result = -ENOENT;
+
+ complete(&req->completion);
+}
+
+static
+ssize_t trigger_batched_requests_async_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct test_batched_req *req;
+ bool send_uevent;
+ int rc;
+ u8 i;
+
+ mutex_lock(&test_fw_mutex);
+
+ if (test_fw_config->reqs) {
+ rc = -EBUSY;
+ goto out_bail;
+ }
+
+ test_fw_config->reqs =
+ vzalloc(array3_size(sizeof(struct test_batched_req),
+ test_fw_config->num_requests, 2));
+ if (!test_fw_config->reqs) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ pr_info("batched loading '%s' custom fallback mechanism %u times\n",
+ test_fw_config->name, test_fw_config->num_requests);
+
+ send_uevent = test_fw_config->send_uevent ? FW_ACTION_UEVENT :
+ FW_ACTION_NOUEVENT;
+
+ for (i = 0; i < test_fw_config->num_requests; i++) {
+ req = &test_fw_config->reqs[i];
+ req->name = test_fw_config->name;
+ req->fw_buf = NULL;
+ req->fw = NULL;
+ req->idx = i;
+ init_completion(&req->completion);
+ rc = request_firmware_nowait(THIS_MODULE, send_uevent,
+ req->name,
+ dev, GFP_KERNEL, req,
+ trigger_batched_cb);
+ if (rc) {
+ pr_info("#%u: batched async load failed setup: %d\n",
+ i, rc);
+ req->rc = rc;
+ goto out_bail;
+ } else
+ req->sent = true;
+ }
+
+ rc = count;
+
+out_bail:
+
+ /*
+ * We require an explicit release to enable more time and delay of
+ * calling release_firmware() to improve our chances of forcing a
+ * batched request. If we instead called release_firmware() right away
+ * then we might miss on an opportunity of having a successful firmware
+ * request pass on the opportunity to be come a batched request.
+ */
+
+ for (i = 0; i < test_fw_config->num_requests; i++) {
+ req = &test_fw_config->reqs[i];
+ if (req->sent)
+ wait_for_completion(&req->completion);
+ }
+
+ /* Override any worker error if we had a general setup error */
+ if (rc < 0)
+ test_fw_config->test_result = rc;
+
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_WO(trigger_batched_requests_async);
+
+static void upload_release(struct test_firmware_upload *tst)
+{
+ firmware_upload_unregister(tst->fwl);
+ kfree(tst->buf);
+ kfree(tst->name);
+ kfree(tst);
+}
+
+static void upload_release_all(void)
+{
+ struct test_firmware_upload *tst, *tmp;
+
+ list_for_each_entry_safe(tst, tmp, &test_upload_list, node) {
+ list_del(&tst->node);
+ upload_release(tst);
+ }
+ test_fw_config->upload_name = NULL;
+}
+
+/*
+ * This table is replicated from .../firmware_loader/sysfs_upload.c
+ * and needs to be kept in sync.
+ */
+static const char * const fw_upload_err_str[] = {
+ [FW_UPLOAD_ERR_NONE] = "none",
+ [FW_UPLOAD_ERR_HW_ERROR] = "hw-error",
+ [FW_UPLOAD_ERR_TIMEOUT] = "timeout",
+ [FW_UPLOAD_ERR_CANCELED] = "user-abort",
+ [FW_UPLOAD_ERR_BUSY] = "device-busy",
+ [FW_UPLOAD_ERR_INVALID_SIZE] = "invalid-file-size",
+ [FW_UPLOAD_ERR_RW_ERROR] = "read-write-error",
+ [FW_UPLOAD_ERR_WEAROUT] = "flash-wearout",
+};
+
+static void upload_err_inject_error(struct test_firmware_upload *tst,
+ const u8 *p, const char *prog)
+{
+ enum fw_upload_err err;
+
+ for (err = FW_UPLOAD_ERR_NONE + 1; err < FW_UPLOAD_ERR_MAX; err++) {
+ if (strncmp(p, fw_upload_err_str[err],
+ strlen(fw_upload_err_str[err])) == 0) {
+ tst->inject.prog = prog;
+ tst->inject.err_code = err;
+ return;
+ }
+ }
+}
+
+static void upload_err_inject_prog(struct test_firmware_upload *tst,
+ const u8 *p)
+{
+ static const char * const progs[] = {
+ "preparing:", "transferring:", "programming:"
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(progs); i++) {
+ if (strncmp(p, progs[i], strlen(progs[i])) == 0) {
+ upload_err_inject_error(tst, p + strlen(progs[i]),
+ progs[i]);
+ return;
+ }
+ }
+}
+
+#define FIVE_MINUTES_MS (5 * 60 * 1000)
+static enum fw_upload_err
+fw_upload_wait_on_cancel(struct test_firmware_upload *tst)
+{
+ int ms_delay;
+
+ for (ms_delay = 0; ms_delay < FIVE_MINUTES_MS; ms_delay += 100) {
+ msleep(100);
+ if (tst->cancel_request)
+ return FW_UPLOAD_ERR_CANCELED;
+ }
+ return FW_UPLOAD_ERR_NONE;
+}
+
+static enum fw_upload_err test_fw_upload_prepare(struct fw_upload *fwl,
+ const u8 *data, u32 size)
+{
+ struct test_firmware_upload *tst = fwl->dd_handle;
+ enum fw_upload_err ret = FW_UPLOAD_ERR_NONE;
+ const char *progress = "preparing:";
+
+ tst->cancel_request = false;
+
+ if (!size || size > TEST_UPLOAD_MAX_SIZE) {
+ ret = FW_UPLOAD_ERR_INVALID_SIZE;
+ goto err_out;
+ }
+
+ if (strncmp(data, "inject:", strlen("inject:")) == 0)
+ upload_err_inject_prog(tst, data + strlen("inject:"));
+
+ memset(tst->buf, 0, TEST_UPLOAD_MAX_SIZE);
+ tst->size = size;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_NONE ||
+ strncmp(tst->inject.prog, progress, strlen(progress)) != 0)
+ return FW_UPLOAD_ERR_NONE;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_CANCELED)
+ ret = fw_upload_wait_on_cancel(tst);
+ else
+ ret = tst->inject.err_code;
+
+err_out:
+ /*
+ * The cleanup op only executes if the prepare op succeeds.
+ * If the prepare op fails, it must do it's own clean-up.
+ */
+ tst->inject.err_code = FW_UPLOAD_ERR_NONE;
+ tst->inject.prog = NULL;
+
+ return ret;
+}
+
+static enum fw_upload_err test_fw_upload_write(struct fw_upload *fwl,
+ const u8 *data, u32 offset,
+ u32 size, u32 *written)
+{
+ struct test_firmware_upload *tst = fwl->dd_handle;
+ const char *progress = "transferring:";
+ u32 blk_size;
+
+ if (tst->cancel_request)
+ return FW_UPLOAD_ERR_CANCELED;
+
+ blk_size = min_t(u32, TEST_UPLOAD_BLK_SIZE, size);
+ memcpy(tst->buf + offset, data + offset, blk_size);
+
+ *written = blk_size;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_NONE ||
+ strncmp(tst->inject.prog, progress, strlen(progress)) != 0)
+ return FW_UPLOAD_ERR_NONE;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_CANCELED)
+ return fw_upload_wait_on_cancel(tst);
+
+ return tst->inject.err_code;
+}
+
+static enum fw_upload_err test_fw_upload_complete(struct fw_upload *fwl)
+{
+ struct test_firmware_upload *tst = fwl->dd_handle;
+ const char *progress = "programming:";
+
+ if (tst->cancel_request)
+ return FW_UPLOAD_ERR_CANCELED;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_NONE ||
+ strncmp(tst->inject.prog, progress, strlen(progress)) != 0)
+ return FW_UPLOAD_ERR_NONE;
+
+ if (tst->inject.err_code == FW_UPLOAD_ERR_CANCELED)
+ return fw_upload_wait_on_cancel(tst);
+
+ return tst->inject.err_code;
+}
+
+static void test_fw_upload_cancel(struct fw_upload *fwl)
+{
+ struct test_firmware_upload *tst = fwl->dd_handle;
+
+ tst->cancel_request = true;
+}
+
+static void test_fw_cleanup(struct fw_upload *fwl)
+{
+ struct test_firmware_upload *tst = fwl->dd_handle;
+
+ tst->inject.err_code = FW_UPLOAD_ERR_NONE;
+ tst->inject.prog = NULL;
+}
+
+static const struct fw_upload_ops upload_test_ops = {
+ .prepare = test_fw_upload_prepare,
+ .write = test_fw_upload_write,
+ .poll_complete = test_fw_upload_complete,
+ .cancel = test_fw_upload_cancel,
+ .cleanup = test_fw_cleanup
+};
+
+static ssize_t upload_register_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct test_firmware_upload *tst;
+ struct fw_upload *fwl;
+ char *name;
+ int ret;
+
+ name = kstrndup(buf, count, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+
+ mutex_lock(&test_fw_mutex);
+ tst = upload_lookup_name(name);
+ if (tst) {
+ ret = -EEXIST;
+ goto free_name;
+ }
+
+ tst = kzalloc(sizeof(*tst), GFP_KERNEL);
+ if (!tst) {
+ ret = -ENOMEM;
+ goto free_name;
+ }
+
+ tst->name = name;
+ tst->buf = kzalloc(TEST_UPLOAD_MAX_SIZE, GFP_KERNEL);
+ if (!tst->buf) {
+ ret = -ENOMEM;
+ goto free_tst;
+ }
+
+ fwl = firmware_upload_register(THIS_MODULE, dev, tst->name,
+ &upload_test_ops, tst);
+ if (IS_ERR(fwl)) {
+ ret = PTR_ERR(fwl);
+ goto free_buf;
+ }
+
+ tst->fwl = fwl;
+ list_add_tail(&tst->node, &test_upload_list);
+ mutex_unlock(&test_fw_mutex);
+ return count;
+
+free_buf:
+ kfree(tst->buf);
+
+free_tst:
+ kfree(tst);
+
+free_name:
+ mutex_unlock(&test_fw_mutex);
+ kfree(name);
+
+ return ret;
+}
+static DEVICE_ATTR_WO(upload_register);
+
+static ssize_t upload_unregister_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct test_firmware_upload *tst;
+ int ret = count;
+
+ mutex_lock(&test_fw_mutex);
+ tst = upload_lookup_name(buf);
+ if (!tst) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (test_fw_config->upload_name == tst->name)
+ test_fw_config->upload_name = NULL;
+
+ list_del(&tst->node);
+ upload_release(tst);
+
+out:
+ mutex_unlock(&test_fw_mutex);
+ return ret;
+}
+static DEVICE_ATTR_WO(upload_unregister);
+
+static ssize_t test_result_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return test_dev_config_show_int(buf, test_fw_config->test_result);
+}
+static DEVICE_ATTR_RO(test_result);
+
+static ssize_t release_all_firmware_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ test_release_all_firmware();
+ return count;
+}
+static DEVICE_ATTR_WO(release_all_firmware);
+
+static ssize_t read_firmware_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct test_batched_req *req;
+ u8 idx;
+ ssize_t rc = 0;
+
+ mutex_lock(&test_fw_mutex);
+
+ idx = test_fw_config->read_fw_idx;
+ if (idx >= test_fw_config->num_requests) {
+ rc = -ERANGE;
+ goto out;
+ }
+
+ if (!test_fw_config->reqs) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ req = &test_fw_config->reqs[idx];
+ if (!req->fw) {
+ pr_err("#%u: failed to async load firmware\n", idx);
+ rc = -ENOENT;
+ goto out;
+ }
+
+ pr_info("#%u: loaded %zu\n", idx, req->fw->size);
+
+ if (req->fw->size > PAGE_SIZE) {
+ pr_err("Testing interface must use PAGE_SIZE firmware for now\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(buf, req->fw->data, req->fw->size);
+
+ rc = req->fw->size;
+out:
+ mutex_unlock(&test_fw_mutex);
+
+ return rc;
+}
+static DEVICE_ATTR_RO(read_firmware);
+
+static ssize_t upload_read_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct test_firmware_upload *tst = NULL;
+ struct test_firmware_upload *tst_iter;
+ int ret = -EINVAL;
+
+ if (!test_fw_config->upload_name) {
+ pr_err("Set config_upload_name before using upload_read\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&test_fw_mutex);
+ list_for_each_entry(tst_iter, &test_upload_list, node)
+ if (tst_iter->name == test_fw_config->upload_name) {
+ tst = tst_iter;
+ break;
+ }
+
+ if (!tst) {
+ pr_err("Firmware name not found: %s\n",
+ test_fw_config->upload_name);
+ goto out;
+ }
+
+ if (tst->size > PAGE_SIZE) {
+ pr_err("Testing interface must use PAGE_SIZE firmware for now\n");
+ goto out;
+ }
+
+ memcpy(buf, tst->buf, tst->size);
+ ret = tst->size;
+out:
+ mutex_unlock(&test_fw_mutex);
+ return ret;
+}
+static DEVICE_ATTR_RO(upload_read);
+
+#define TEST_FW_DEV_ATTR(name) &dev_attr_##name.attr
+
+static struct attribute *test_dev_attrs[] = {
+ TEST_FW_DEV_ATTR(reset),
+
+ TEST_FW_DEV_ATTR(config),
+ TEST_FW_DEV_ATTR(config_name),
+ TEST_FW_DEV_ATTR(config_num_requests),
+ TEST_FW_DEV_ATTR(config_into_buf),
+ TEST_FW_DEV_ATTR(config_buf_size),
+ TEST_FW_DEV_ATTR(config_file_offset),
+ TEST_FW_DEV_ATTR(config_partial),
+ TEST_FW_DEV_ATTR(config_sync_direct),
+ TEST_FW_DEV_ATTR(config_send_uevent),
+ TEST_FW_DEV_ATTR(config_read_fw_idx),
+ TEST_FW_DEV_ATTR(config_upload_name),
+
+ /* These don't use the config at all - they could be ported! */
+ TEST_FW_DEV_ATTR(trigger_request),
+ TEST_FW_DEV_ATTR(trigger_async_request),
+ TEST_FW_DEV_ATTR(trigger_custom_fallback),
+#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
+ TEST_FW_DEV_ATTR(trigger_request_platform),
+#endif
+
+ /* These use the config and can use the test_result */
+ TEST_FW_DEV_ATTR(trigger_batched_requests),
+ TEST_FW_DEV_ATTR(trigger_batched_requests_async),
+
+ TEST_FW_DEV_ATTR(release_all_firmware),
+ TEST_FW_DEV_ATTR(test_result),
+ TEST_FW_DEV_ATTR(read_firmware),
+ TEST_FW_DEV_ATTR(upload_read),
+ TEST_FW_DEV_ATTR(upload_register),
+ TEST_FW_DEV_ATTR(upload_unregister),
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(test_dev);
+
+static struct miscdevice test_fw_misc_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "test_firmware",
+ .fops = &test_fw_fops,
+ .groups = test_dev_groups,
+};
+
+static int __init test_firmware_init(void)
+{
+ int rc;
+
+ test_fw_config = kzalloc(sizeof(struct test_config), GFP_KERNEL);
+ if (!test_fw_config)
+ return -ENOMEM;
+
+ rc = __test_firmware_config_init();
+ if (rc) {
+ kfree(test_fw_config);
+ pr_err("could not init firmware test config: %d\n", rc);
+ return rc;
+ }
+
+ rc = misc_register(&test_fw_misc_device);
+ if (rc) {
+ __test_firmware_config_free();
+ kfree(test_fw_config);
+ pr_err("could not register misc device: %d\n", rc);
+ return rc;
+ }
+
+ pr_warn("interface ready\n");
+
+ return 0;
+}
+
+module_init(test_firmware_init);
+
+static void __exit test_firmware_exit(void)
+{
+ mutex_lock(&test_fw_mutex);
+ release_firmware(test_firmware);
+ misc_deregister(&test_fw_misc_device);
+ upload_release_all();
+ __test_firmware_config_free();
+ kfree(test_fw_config);
+ mutex_unlock(&test_fw_mutex);
+
+ pr_warn("removed interface\n");
+}
+
+module_exit(test_firmware_exit);
+
+MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
+MODULE_LICENSE("GPL");