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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/core/blockdev.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/core/blockdev.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/blockdev.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/core/blockdev.c b/qemu/roms/ipxe/src/core/blockdev.c new file mode 100644 index 000000000..9d118cb2f --- /dev/null +++ b/qemu/roms/ipxe/src/core/blockdev.c @@ -0,0 +1,139 @@ +/* + * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <errno.h> +#include <ipxe/interface.h> +#include <ipxe/blockdev.h> + +/** @file + * + * Block devices + * + */ + +/** + * Read from block device + * + * @v control Control interface + * @v data Data interface + * @v lba Starting logical block address + * @v count Number of logical blocks + * @v buffer Data buffer + * @v len Length of data buffer + * @ret rc Return status code + */ +int block_read ( struct interface *control, struct interface *data, + uint64_t lba, unsigned int count, + userptr_t buffer, size_t len ) { + struct interface *dest; + block_read_TYPE ( void * ) *op = + intf_get_dest_op ( control, block_read, &dest ); + void *object = intf_object ( dest ); + int rc; + + if ( op ) { + rc = op ( object, data, lba, count, buffer, len ); + } else { + /* Default is to fail to issue the command */ + rc = -EOPNOTSUPP; + } + + intf_put ( dest ); + return rc; +} + +/** + * Write to block device + * + * @v control Control interface + * @v data Data interface + * @v lba Starting logical block address + * @v count Number of logical blocks + * @v buffer Data buffer + * @v len Length of data buffer + * @ret rc Return status code + */ +int block_write ( struct interface *control, struct interface *data, + uint64_t lba, unsigned int count, + userptr_t buffer, size_t len ) { + struct interface *dest; + block_write_TYPE ( void * ) *op = + intf_get_dest_op ( control, block_write, &dest ); + void *object = intf_object ( dest ); + int rc; + + if ( op ) { + rc = op ( object, data, lba, count, buffer, len ); + } else { + /* Default is to fail to issue the command */ + rc = -EOPNOTSUPP; + } + + intf_put ( dest ); + return rc; +} + +/** + * Read block device capacity + * + * @v control Control interface + * @v data Data interface + * @ret rc Return status code + */ +int block_read_capacity ( struct interface *control, struct interface *data ) { + struct interface *dest; + block_read_capacity_TYPE ( void * ) *op = + intf_get_dest_op ( control, block_read_capacity, &dest ); + void *object = intf_object ( dest ); + int rc; + + if ( op ) { + rc = op ( object, data ); + } else { + /* Default is to fail to issue the command */ + rc = -EOPNOTSUPP; + } + + intf_put ( dest ); + return rc; +} + +/** + * Report block device capacity + * + * @v intf Interface + * @v capacity Block device capacity + */ +void block_capacity ( struct interface *intf, + struct block_device_capacity *capacity ) { + struct interface *dest; + block_capacity_TYPE ( void * ) *op = + intf_get_dest_op ( intf, block_capacity, &dest ); + void *object = intf_object ( dest ); + + if ( op ) { + op ( object, capacity ); + } else { + /* Default is to do nothing */ + } + + intf_put ( dest ); +} |