From 0c30dc6bc5f26e7011ddfcda34d7adac653464cf Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Fri, 17 Jul 2009 22:11:42 +0100
Subject: [infiniband] Add support for SRP over Infiniband

SRP is the SCSI RDMA Protocol.  It allows for a method of SAN booting
whereby the target is responsible for reading and writing data using
Remote DMA directly to the initiator's memory.  The software initiator
merely sends and receives SCSI commands; it never has to touch the
actual data.
---
 src/arch/i386/interface/pcbios/ib_srpboot.c | 63 +++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/arch/i386/interface/pcbios/ib_srpboot.c

(limited to 'src/arch')

diff --git a/src/arch/i386/interface/pcbios/ib_srpboot.c b/src/arch/i386/interface/pcbios/ib_srpboot.c
new file mode 100644
index 000000000..ab90c44fe
--- /dev/null
+++ b/src/arch/i386/interface/pcbios/ib_srpboot.c
@@ -0,0 +1,63 @@
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <gpxe/sanboot.h>
+#include <int13.h>
+#include <gpxe/srp.h>
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+static int ib_srpboot ( const char *root_path ) {
+	struct scsi_device *scsi;
+	struct int13_drive *drive;
+	int rc;
+
+	scsi = zalloc ( sizeof ( *scsi ) );
+	if ( ! scsi ) {
+		rc = -ENOMEM;
+		goto err_alloc_scsi;
+	}
+	drive = zalloc ( sizeof ( *drive ) );
+	if ( ! drive ) {
+		rc = -ENOMEM;
+		goto err_alloc_drive;
+	}
+
+	if ( ( rc = srp_attach ( scsi, root_path ) ) != 0 ) {
+		printf ( "Could not attach IB_SRP device: %s\n",
+			 strerror ( rc ) );
+		goto err_attach;
+	}
+	if ( ( rc = init_scsidev ( scsi ) ) != 0 ) {
+		printf ( "Could not initialise IB_SRP device: %s\n",
+			 strerror ( rc ) );
+		goto err_init;
+	}
+
+	drive->blockdev = &scsi->blockdev;
+
+	register_int13_drive ( drive );
+	printf ( "Registered as BIOS drive %#02x\n", drive->drive );
+	printf ( "Booting from BIOS drive %#02x\n", drive->drive );
+	rc = int13_boot ( drive->drive );
+	printf ( "Boot failed\n" );
+
+	printf ( "Unregistering BIOS drive %#02x\n", drive->drive );
+	unregister_int13_drive ( drive );
+
+ err_init:
+	srp_detach ( scsi );
+ err_attach:
+	free ( drive );
+ err_alloc_drive:
+	free ( scsi );
+ err_alloc_scsi:
+	return rc;
+}
+
+struct sanboot_protocol ib_srp_sanboot_protocol __sanboot_protocol = {
+	.prefix = "ib_srp:",
+	.boot = ib_srpboot,
+};
-- 
cgit v1.2.3-55-g7522