[SCSI] libfc: Add support for FDMI

This patch adds support for Fabric Device Management
Interface as per FC-GS-4 spec. in libfc. Any driver
making use of libfc can enable fdmi state machine
for a given lport.

If lport has enabled FDMI support the lport state
machine will transition into FDMI after completing
the DNS states and before entering the SCR state.
The FDMI state transition is such that if there is an
error, it won't stop the lport state machine from
transitioning and the it will behave as if there was
no FDMI support.

The FDMI HBA attributes are registed with the Management
server via Register HBA (RHBA) command and the port
attributes are reigstered using the Register Port(RPA)
command.

Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Acked-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 213 insertions, 0 deletions

diff --git a/include/scsi/fc/fc_ms.h b/include/scsi/fc/fc_ms.h
new file mode 100644
index 000000000000..f52b921b5c70
--- /dev/null
+++ b/include/scsi/fc/fc_ms.h
@@ -0,0 +1,213 @@
+/* * Copyright(c) 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FC_MS_H_
+#define _FC_MS_H_
+
+#include <linux/types.h>
+
+/*
+ * Fibre Channel Services - Management Service (MS)
+ * From T11.org FC-GS-4 Rev 7.91 February 4, 2004
+ */
+
+/*
+ * Fabric Device Management Interface
+ */
+
+/*
+ * Common-transport sub-type for FDMI
+ */
+#define FC_FDMI_SUBTYPE     0x10 /* fs_ct_hdr.ct_fs_subtype */
+
+/*
+ * Management server FDMI Requests.
+ */
+enum fc_fdmi_req {
+        FC_FDMI_GRHL = 0x0100,  /* Get Registered HBA List */
+        FC_FDMI_GHAT = 0x0101,  /* Get HBA Attributes */
+        FC_FDMI_GRPL = 0x0102,  /* Get Registered Port List */
+        FC_FDMI_GPAT = 0x0110,  /* Get Port Attributes */
+        FC_FDMI_RHBA = 0x0200,  /* Register HBA */
+        FC_FDMI_RHAT = 0x0201,  /* Register HBA Attributes */
+        FC_FDMI_RPRT = 0x0210,  /* Register Port */
+        FC_FDMI_RPA = 0x0211,   /* Register Port Attributes */
+        FC_FDMI_DHBA = 0x0300,  /* Deregister HBA */
+        FC_FDMI_DHAT = 0x0301,  /* Deregister HBA Attributes */
+        FC_FDMI_DPRT = 0x0310,  /* Deregister Port */
+        FC_FDMI_DPA = 0x0311,   /* Deregister Port Attributes */
+};
+
+/*
+ * HBA Attribute Entry Type
+ */
+enum fc_fdmi_hba_attr_type {
+        FC_FDMI_HBA_ATTR_NODENAME = 0x0001,
+        FC_FDMI_HBA_ATTR_MANUFACTURER = 0x0002,
+        FC_FDMI_HBA_ATTR_SERIALNUMBER = 0x0003,
+        FC_FDMI_HBA_ATTR_MODEL = 0x0004,
+        FC_FDMI_HBA_ATTR_MODELDESCRIPTION = 0x0005,
+        FC_FDMI_HBA_ATTR_HARDWAREVERSION = 0x0006,
+        FC_FDMI_HBA_ATTR_DRIVERVERSION = 0x0007,
+        FC_FDMI_HBA_ATTR_OPTIONROMVERSION = 0x0008,
+        FC_FDMI_HBA_ATTR_FIRMWAREVERSION = 0x0009,
+        FC_FDMI_HBA_ATTR_OSNAMEVERSION = 0x000A,
+        FC_FDMI_HBA_ATTR_MAXCTPAYLOAD = 0x000B,
+};
+
+/*
+ * HBA Attribute Length
+ */
+#define FC_FDMI_HBA_ATTR_NODENAME_LEN           8
+#define FC_FDMI_HBA_ATTR_MANUFACTURER_LEN       64
+#define FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN       64
+#define FC_FDMI_HBA_ATTR_MODEL_LEN              256
+#define FC_FDMI_HBA_ATTR_MODELDESCR_LEN         256
+#define FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN    256
+#define FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN      256
+#define FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN   256
+#define FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN    256
+#define FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN      256
+#define FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN       4
+
+/*
+ * Port Attribute Type
+ */
+enum fc_fdmi_port_attr_type {
+        FC_FDMI_PORT_ATTR_FC4TYPES = 0x0001,
+        FC_FDMI_PORT_ATTR_SUPPORTEDSPEED = 0x0002,
+        FC_FDMI_PORT_ATTR_CURRENTPORTSPEED = 0x0003,
+        FC_FDMI_PORT_ATTR_MAXFRAMESIZE = 0x0004,
+        FC_FDMI_PORT_ATTR_OSDEVICENAME = 0x0005,
+        FC_FDMI_PORT_ATTR_HOSTNAME = 0x0006,
+};
+
+/*
+ * Port Attribute Length
+ */
+#define FC_FDMI_PORT_ATTR_FC4TYPES_LEN          32
+#define FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN    4
+#define FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN  4
+#define FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN      4
+#define FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN      256
+#define FC_FDMI_PORT_ATTR_HOSTNAME_LEN          256
+
+/*
+ * HBA Attribute ID
+ */
+struct fc_fdmi_hba_identifier {
+        __be64          id;
+};
+
+/*
+ * Port Name
+ */
+struct fc_fdmi_port_name {
+        __be64          portname;
+};
+
+/*
+ * Attribute Entry Block for HBA/Port Attributes
+ */
+#define FC_FDMI_ATTR_ENTRY_HEADER_LEN   4
+struct fc_fdmi_attr_entry {
+        __be16          type;
+        __be16          len;
+        __u8            value[1];
+} __attribute__((__packed__));
+
+/*
+ * Common for HBA/Port Attributes
+ */
+struct fs_fdmi_attrs {
+        __be32                          numattrs;
+        struct fc_fdmi_attr_entry       attr[1];
+} __attribute__((__packed__));
+
+/*
+ * Registered Port List
+ */
+struct fc_fdmi_rpl {
+        __be32                          numport;
+        struct fc_fdmi_port_name        port[1];
+} __attribute__((__packed__));
+
+/*
+ * Register HBA (RHBA)
+ */
+struct fc_fdmi_rhba {
+        struct fc_fdmi_hba_identifier hbaid;
+        struct fc_fdmi_rpl               port;
+        struct fs_fdmi_attrs             hba_attrs;
+} __attribute__((__packed__));
+
+/*
+ * Register HBA Attributes (RHAT)
+ */
+struct fc_fdmi_rhat {
+        struct fc_fdmi_hba_identifier hbaid;
+        struct fs_fdmi_attrs             hba_attrs;
+} __attribute__((__packed__));
+
+/*
+ * Register Port (RPRT)
+ */
+struct fc_fdmi_rprt {
+        struct fc_fdmi_hba_identifier hbaid;
+        struct fc_fdmi_port_name         port;
+        struct fs_fdmi_attrs             hba_attrs;
+} __attribute__((__packed__));
+
+/*
+ * Register Port Attributes (RPA)
+ */
+struct fc_fdmi_rpa {
+        struct fc_fdmi_port_name         port;
+        struct fs_fdmi_attrs             hba_attrs;
+} __attribute__((__packed__));
+
+/*
+ * Deregister Port (DPRT)
+ */
+struct fc_fdmi_dprt {
+        struct fc_fdmi_port_name         port;
+} __attribute__((__packed__));
+
+/*
+ * Deregister Port Attributes (DPA)
+ */
+struct fc_fdmi_dpa {
+        struct fc_fdmi_port_name         port;
+        struct fs_fdmi_attrs             hba_attrs;
+} __attribute__((__packed__));
+
+/*
+ * Deregister HBA Attributes (DHAT)
+ */
+struct fc_fdmi_dhat {
+        struct fc_fdmi_hba_identifier hbaid;
+} __attribute__((__packed__));
+
+/*
+ * Deregister HBA (DHBA)
+ */
+struct fc_fdmi_dhba {
+        struct fc_fdmi_hba_identifier hbaid;
+} __attribute__((__packed__));
+
+#endif /* _FC_MS_H_ */