linux-kernel - [PATCH v2 09/10] efi: Add EFI file I/O data types

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Date:	Mon, 12 Sep 2011 15:34:53 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	linux-kernel@...r.kernel.org
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Matthew Garrett <mjg@...hat.com>, x86@...nel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Matt Fleming <matt.fleming@...el.com>
Subject: [PATCH v2 09/10] efi: Add EFI file I/O data types

From: Matt Fleming <matt.fleming@...el.com>

The x86 EFI stub needs to access files, for example when loading
initrd's. Add the required data types.

Cc: Matthew Garrett <mjg@...hat.com>
Cc: "H. Peter Anvin" <hpa@...ux.intel.com>
Signed-off-by: Matt Fleming <matt.fleming@...el.com>
---

v2: use __aligned_u64 because x86 only aligns 64-bit data types on a
   4-byte boundary unless instructed otherwise.

 include/linux/efi.h |   40 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)

diff --git a/include/linux/efi.h b/include/linux/efi.h
index d407c88..37c3007 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -307,6 +307,12 @@ typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 #define EFI_PCI_IO_PROTOCOL_GUID \
     EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 
+#define EFI_FILE_INFO_ID \
+    EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
+
+#define EFI_FILE_SYSTEM_GUID \
+    EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
+
 typedef struct {
 	efi_guid_t guid;
 	unsigned long table;
@@ -362,6 +368,40 @@ typedef struct {
 	unsigned long unload;
 } efi_loaded_image_t;
 
+typedef struct {
+	u64 revision;
+	void *open_volume;
+} efi_file_io_interface_t;
+
+typedef struct {
+	u64 size;
+	u64 file_size;
+	u64 phys_size;
+	efi_time_t create_time;
+	efi_time_t last_access_time;
+	efi_time_t modification_time;
+	__aligned_u64 attribute;
+	efi_char16_t filename[1];
+} efi_file_info_t;
+
+typedef struct {
+	u64 revision;
+	void *open;
+	void *close;
+	void *delete;
+	void *read;
+	void *write;
+	void *get_position;
+	void *set_position;
+	void *get_info;
+	void *set_info;
+	void *flush;
+} efi_file_handle_t;
+
+#define EFI_FILE_MODE_READ	0x0000000000000001
+#define EFI_FILE_MODE_WRITE	0x0000000000000002
+#define EFI_FILE_MODE_CREATE	0x8000000000000000
+
 #define EFI_INVALID_TABLE_ADDR		(~0UL)
 
 /*
-- 
1.7.4.4

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