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| author | Michael Brown | 2010-09-03 17:11:51 +0200 |
|---|---|---|
| committer | Michael Brown | 2010-09-14 21:37:15 +0200 |
| commit | 220495f8bf2222e1dc1aa7db554d23997b545546 (patch) | |
| tree | f04aa0d123a0b643fc41e178db81cfe63ba913bf /src/config/defaults | |
| parent | [hermon] Use correct alignment for doorbell records (diff) | |
| download | ipxe-220495f8bf2222e1dc1aa7db554d23997b545546.tar.gz ipxe-220495f8bf2222e1dc1aa7db554d23997b545546.tar.xz ipxe-220495f8bf2222e1dc1aa7db554d23997b545546.zip | |
[block] Replace gPXE block-device API with an iPXE asynchronous interface
The block device interface used in gPXE predates the invention of even
the old gPXE data-transfer interface, let alone the current iPXE
generic asynchronous interface mechanism. Bring this old code up to
date, with the following benefits:
o Block device commands can be cancelled by the requestor. The INT 13
layer uses this to provide a global timeout on all INT 13 calls,
with the result that an unexpected passive failure mode (such as
an iSCSI target ACKing the request but never sending a response)
will lead to a timeout that gets reported back to the INT 13 user,
rather than simply freezing the system.
o INT 13,00 (reset drive) is now able to reset the underlying block
device. INT 13 users, such as DOS, that use INT 13,00 as a method
for error recovery now have a chance of recovering.
o All block device commands are tagged, with a numerical tag that
will show up in debugging output and in packet captures; this will
allow easier interpretation of bug reports that include both
sources of information.
o The extremely ugly hacks used to generate the boot firmware tables
have been eradicated and replaced with a generic acpi_describe()
method (exploiting the ability of iPXE interfaces to pass through
methods to an underlying interface). The ACPI tables are now
built in a shared data block within .bss16, rather than each
requiring dedicated space in .data16.
o The architecture-independent concept of a SAN device has been
exposed to the iPXE core through the sanboot API, which provides
calls to hook, unhook, boot, and describe SAN devices. This
allows for much more flexible usage patterns (such as hooking an
empty SAN device and then running an OS installer via TFTP).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/config/defaults')
| -rw-r--r-- | src/config/defaults/efi.h | 1 | ||||
| -rw-r--r-- | src/config/defaults/linux.h | 1 | ||||
| -rw-r--r-- | src/config/defaults/pcbios.h | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/src/config/defaults/efi.h b/src/config/defaults/efi.h index 35e5fde9..9c3f3ff3 100644 --- a/src/config/defaults/efi.h +++ b/src/config/defaults/efi.h @@ -15,6 +15,7 @@ #define NAP_EFIX86 #define UMALLOC_EFI #define SMBIOS_EFI +#define SANBOOT_NULL #define IMAGE_EFI /* EFI image support */ #define IMAGE_SCRIPT /* iPXE script image support */ diff --git a/src/config/defaults/linux.h b/src/config/defaults/linux.h index 901097fd..647dc0a5 100644 --- a/src/config/defaults/linux.h +++ b/src/config/defaults/linux.h @@ -13,6 +13,7 @@ #define UMALLOC_LINUX #define NAP_LINUX #define SMBIOS_LINUX +#define SANBOOT_NULL #define DRIVERS_LINUX diff --git a/src/config/defaults/pcbios.h b/src/config/defaults/pcbios.h index 246a8cd9..d2ffc3d2 100644 --- a/src/config/defaults/pcbios.h +++ b/src/config/defaults/pcbios.h @@ -17,6 +17,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define NAP_PCBIOS #define UMALLOC_MEMTOP #define SMBIOS_PCBIOS +#define SANBOOT_PCBIOS #define IMAGE_ELF /* ELF image support */ #define IMAGE_MULTIBOOT /* MultiBoot image support */ |