| // 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/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; |
| struct completion completion; |
| struct task_struct *task; |
| struct device *dev; |
| }; |
| |
| /** |
| * 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) |
| release_firmware(req->fw); |
| } |
| |
| 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 -ENOSPC; |
| 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:\tEMTPY\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:\tEMTPY\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 int test_dev_config_update_bool(const char *buf, size_t size, |
| bool *cfg) |
| { |
| int ret; |
| |
| mutex_lock(&test_fw_mutex); |
| if (strtobool(buf, cfg) < 0) |
| ret = -EINVAL; |
| else |
| ret = size; |
| 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; |
| |
| mutex_lock(&test_fw_mutex); |
| *(size_t *)cfg = new; |
| mutex_unlock(&test_fw_mutex); |
| |
| /* 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; |
| |
| mutex_lock(&test_fw_mutex); |
| *(u8 *)cfg = val; |
| mutex_unlock(&test_fw_mutex); |
| |
| /* Always return full write size even if we didn't consume all */ |
| return size; |
| } |
| |
| 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; |
| } |
| mutex_unlock(&test_fw_mutex); |
| |
| rc = test_dev_config_update_u8(buf, count, |
| &test_fw_config->num_requests); |
| |
| 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; |
| } |
| mutex_unlock(&test_fw_mutex); |
| |
| rc = test_dev_config_update_size_t(buf, count, |
| &test_fw_config->buf_size); |
| |
| 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; |
| } |
| mutex_unlock(&test_fw_mutex); |
| |
| rc = test_dev_config_update_size_t(buf, count, |
| &test_fw_config->file_offset); |
| |
| 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 -ENOSPC; |
| |
| pr_info("loading '%s'\n", name); |
| |
| mutex_lock(&test_fw_mutex); |
| release_firmware(test_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 -ENOSPC; |
| |
| 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 -ENOSPC; |
| |
| pr_info("loading '%s'\n", name); |
| |
| mutex_lock(&test_fw_mutex); |
| release_firmware(test_firmware); |
| test_firmware = NULL; |
| 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 -ENOSPC; |
| |
| pr_info("loading '%s' using custom fallback mechanism\n", name); |
| |
| mutex_lock(&test_fw_mutex); |
| release_firmware(test_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 -ENOSPC; |
| |
| 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->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); |
| |
| 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->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); |
| |
| 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 = 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"); |