test_firmware: add support for firmware_request_platform

Add support for testing firmware_request_platform through a new
trigger_request_platform trigger.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20200115163554.101315-6-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 251213c..0c7fbcf 100644 (file)
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -24,6 +24,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/vmalloc.h>
+#include <linux/efi_embedded_fw.h>
 
 #define TEST_FIRMWARE_NAME     "test-firmware.bin"
 #define TEST_FIRMWARE_NUM_REQS 4
@@ -507,6 +508,57 @@ out:
 }
 static DEVICE_ATTR_WO(trigger_request);
 
+#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
+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;
+       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);
+
+       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:
+       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)
@@ -903,6 +955,9 @@ static struct attribute *test_dev_attrs[] = {
        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),