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[fcp] Add support for describing an FCP device using EDD

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2010-09-22 00:44:27 +01:00
parent f8fa23b183
commit a5a4dcd0c7
1 changed files with 68 additions and 4 deletions
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72
src/net/fcp.c
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@ -36,6 +36,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/uri.h>
#include <ipxe/acpi.h>
#include <ipxe/scsi.h>
#include <ipxe/device.h>
#include <ipxe/edd.h>
#include <ipxe/fc.h>
#include <ipxe/fcels.h>
#include <ipxe/fcp.h>
@ -152,6 +154,11 @@ struct fcp_device {
struct interface scsi;
/** List of active commands */
struct list_head fcpcmds;
/** Fibre Channel WWN (for boot firmware table) */
struct fc_name wwn;
/** SCSI LUN (for boot firmware table) */
struct scsi_lun lun;
};
/** An FCP command */
@ -840,9 +847,9 @@ static size_t fcpdev_window ( struct fcp_device *fcpdev ) {
* @v len Length of ACPI table
* @ret rc Return status code
*/
static int fcpdev_describe ( struct fcp_device *fcpdev,
struct acpi_description_header *acpi,
size_t len ) {
static int fcpdev_acpi_describe ( struct fcp_device *fcpdev,
struct acpi_description_header *acpi,
size_t len ) {
DBGC ( fcpdev, "FCP %p cannot yet describe device in an ACPI table\n",
fcpdev );
@ -851,12 +858,65 @@ static int fcpdev_describe ( struct fcp_device *fcpdev,
return 0;
}
/**
* Describe FCP device using EDD
*
* @v fcpdev FCP device
* @v type EDD interface type
* @v path EDD device path
* @ret rc Return status code
*/
static int fcpdev_edd_describe ( struct fcp_device *fcpdev,
struct edd_interface_type *type,
union edd_device_path *path ) {
union {
struct fc_name fc;
uint64_t u64;
} wwn;
union {
struct scsi_lun scsi;
uint64_t u64;
} lun;
type->type = cpu_to_le64 ( EDD_INTF_TYPE_FIBRE );
memcpy ( &wwn.fc, &fcpdev->wwn, sizeof ( wwn.fc ) );
path->fibre.wwn = be64_to_cpu ( wwn.u64 );
memcpy ( &lun.scsi, &fcpdev->lun, sizeof ( lun.scsi ) );
path->fibre.lun = be64_to_cpu ( lun.u64 );
return 0;
}
/**
* Identify device underlying FCP device
*
* @v fcpdev FCP device
* @ret device Underlying device
*/
static struct device * fcpdev_identify_device ( struct fcp_device *fcpdev ) {
/* We know the underlying device only if the link is up;
* otherwise we don't have a port to examine.
*/
if ( ! fc_link_ok ( &fcpdev->ulp->link ) ) {
DBGC ( fcpdev, "FCP %p doesn't know underlying device "
"until link is up\n", fcpdev );
return NULL;
}
/* Hand off to port's transport interface */
assert ( fcpdev->ulp->peer->port != NULL );
return identify_device ( &fcpdev->ulp->peer->port->transport );
}
/** FCP device SCSI interface operations */
static struct interface_operation fcpdev_scsi_op[] = {
INTF_OP ( scsi_command, struct fcp_device *, fcpdev_scsi_command ),
INTF_OP ( xfer_window, struct fcp_device *, fcpdev_window ),
INTF_OP ( intf_close, struct fcp_device *, fcpdev_close ),
INTF_OP ( acpi_describe, struct fcp_device *, fcpdev_describe ),
INTF_OP ( acpi_describe, struct fcp_device *, fcpdev_acpi_describe ),
INTF_OP ( edd_describe, struct fcp_device *, fcpdev_edd_describe ),
INTF_OP ( identify_device, struct fcp_device *,
fcpdev_identify_device ),
};
/** FCP device SCSI interface descriptor */
@ -898,6 +958,10 @@ static int fcpdev_open ( struct interface *parent, struct fc_name *wwn,
DBGC ( fcpdev, "FCP %p opened for %s\n", fcpdev, fc_ntoa ( wwn ) );
/* Preserve parameters required for boot firmware table */
memcpy ( &fcpdev->wwn, wwn, sizeof ( fcpdev->wwn ) );
memcpy ( &fcpdev->lun, lun, sizeof ( fcpdev->lun ) );
/* Attach SCSI device to parent interface */
if ( ( rc = scsi_open ( parent, &fcpdev->scsi, lun ) ) != 0 ) {
DBGC ( fcpdev, "FCP %p could not create SCSI device: %s\n",