2 * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL
);
27 #include <ipxe/interface.h>
28 #include <ipxe/blockdev.h>
37 * Read from block device
39 * @v control Control interface
40 * @v data Data interface
41 * @v lba Starting logical block address
42 * @v count Number of logical blocks
43 * @v buffer Data buffer
44 * @v len Length of data buffer
45 * @ret rc Return status code
47 int block_read ( struct interface
*control
, struct interface
*data
,
48 uint64_t lba
, unsigned int count
,
49 userptr_t buffer
, size_t len
) {
50 struct interface
*dest
;
51 block_read_TYPE ( void * ) *op
=
52 intf_get_dest_op ( control
, block_read
, &dest
);
53 void *object
= intf_object ( dest
);
57 rc
= op ( object
, data
, lba
, count
, buffer
, len
);
59 /* Default is to fail to issue the command */
68 * Write to block device
70 * @v control Control interface
71 * @v data Data interface
72 * @v lba Starting logical block address
73 * @v count Number of logical blocks
74 * @v buffer Data buffer
75 * @v len Length of data buffer
76 * @ret rc Return status code
78 int block_write ( struct interface
*control
, struct interface
*data
,
79 uint64_t lba
, unsigned int count
,
80 userptr_t buffer
, size_t len
) {
81 struct interface
*dest
;
82 block_write_TYPE ( void * ) *op
=
83 intf_get_dest_op ( control
, block_write
, &dest
);
84 void *object
= intf_object ( dest
);
88 rc
= op ( object
, data
, lba
, count
, buffer
, len
);
90 /* Default is to fail to issue the command */
99 * Read block device capacity
101 * @v control Control interface
102 * @v data Data interface
103 * @ret rc Return status code
105 int block_read_capacity ( struct interface
*control
, struct interface
*data
) {
106 struct interface
*dest
;
107 block_read_capacity_TYPE ( void * ) *op
=
108 intf_get_dest_op ( control
, block_read_capacity
, &dest
);
109 void *object
= intf_object ( dest
);
113 rc
= op ( object
, data
);
115 /* Default is to fail to issue the command */
124 * Report block device capacity
127 * @v capacity Block device capacity
129 void block_capacity ( struct interface
*intf
,
130 struct block_device_capacity
*capacity
) {
131 struct interface
*dest
;
132 block_capacity_TYPE ( void * ) *op
=
133 intf_get_dest_op ( intf
, block_capacity
, &dest
);
134 void *object
= intf_object ( dest
);
137 op ( object
, capacity
);
139 /* Default is to do nothing */