drivers/ieee1394/sbp2.h - kernel/msm-4.9 - Gitiles

 /*
  * sbp2.h - Defines and prototypes for sbp2.c
  *
  * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
  * jamesg@filanet.com
  *
  * 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
  * (at your option) 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */

 #ifndef SBP2_H
 #define SBP2_H

 #define SBP2_DEVICE_NAME		"sbp2"

 /*
  * SBP2 specific structures and defines
  */

 #define ORB_DIRECTION_WRITE_TO_MEDIA    0x0
 #define ORB_DIRECTION_READ_FROM_MEDIA   0x1
 #define ORB_DIRECTION_NO_DATA_TRANSFER  0x2

 #define ORB_SET_NULL_PTR(value)			((value & 0x1) << 31)
 #define ORB_SET_NOTIFY(value)                   ((value & 0x1) << 31)
 #define ORB_SET_RQ_FMT(value)                   ((value & 0x3) << 29)	/* unused ? */
 #define ORB_SET_NODE_ID(value)			((value & 0xffff) << 16)
 #define ORB_SET_DATA_SIZE(value)                (value & 0xffff)
 #define ORB_SET_PAGE_SIZE(value)                ((value & 0x7) << 16)
 #define ORB_SET_PAGE_TABLE_PRESENT(value)       ((value & 0x1) << 19)
 #define ORB_SET_MAX_PAYLOAD(value)              ((value & 0xf) << 20)
 #define ORB_SET_SPEED(value)                    ((value & 0x7) << 24)
 #define ORB_SET_DIRECTION(value)                ((value & 0x1) << 27)

 struct sbp2_command_orb {
 	volatile u32 next_ORB_hi;
 	volatile u32 next_ORB_lo;
 	u32 data_descriptor_hi;
 	u32 data_descriptor_lo;
 	u32 misc;
 	u8 cdb[12];
 };

 #define SBP2_LOGIN_REQUEST		0x0
 #define SBP2_QUERY_LOGINS_REQUEST	0x1
 #define SBP2_RECONNECT_REQUEST		0x3
 #define SBP2_SET_PASSWORD_REQUEST	0x4
 #define SBP2_LOGOUT_REQUEST		0x7
 #define SBP2_ABORT_TASK_REQUEST		0xb
 #define SBP2_ABORT_TASK_SET		0xc
 #define SBP2_LOGICAL_UNIT_RESET		0xe
 #define SBP2_TARGET_RESET_REQUEST	0xf

 #define ORB_SET_LUN(value)                      (value & 0xffff)
 #define ORB_SET_FUNCTION(value)                 ((value & 0xf) << 16)
 #define ORB_SET_RECONNECT(value)                ((value & 0xf) << 20)
 #define ORB_SET_EXCLUSIVE(value)                ((value & 0x1) << 28)
 #define ORB_SET_LOGIN_RESP_LENGTH(value)        (value & 0xffff)
 #define ORB_SET_PASSWD_LENGTH(value)            ((value & 0xffff) << 16)

 struct sbp2_login_orb {
 	u32 password_hi;
 	u32 password_lo;
 	u32 login_response_hi;
 	u32 login_response_lo;
 	u32 lun_misc;
 	u32 passwd_resp_lengths;
 	u32 status_FIFO_hi;
 	u32 status_FIFO_lo;
 };

 #define RESPONSE_GET_LOGIN_ID(value)            (value & 0xffff)
 #define RESPONSE_GET_LENGTH(value)              ((value >> 16) & 0xffff)
 #define RESPONSE_GET_RECONNECT_HOLD(value)      (value & 0xffff)

 struct sbp2_login_response {
 	u32 length_login_ID;
 	u32 command_block_agent_hi;
 	u32 command_block_agent_lo;
 	u32 reconnect_hold;
 };

 #define ORB_SET_LOGIN_ID(value)                 (value & 0xffff)

 #define ORB_SET_QUERY_LOGINS_RESP_LENGTH(value) (value & 0xffff)

 struct sbp2_query_logins_orb {
 	u32 reserved1;
 	u32 reserved2;
 	u32 query_response_hi;
 	u32 query_response_lo;
 	u32 lun_misc;
 	u32 reserved_resp_length;
 	u32 status_FIFO_hi;
 	u32 status_FIFO_lo;
 };

 #define RESPONSE_GET_MAX_LOGINS(value)          (value & 0xffff)
 #define RESPONSE_GET_ACTIVE_LOGINS(value)       ((RESPONSE_GET_LENGTH(value) - 4) / 12)

 struct sbp2_query_logins_response {
 	u32 length_max_logins;
 	u32 misc_IDs;
 	u32 initiator_misc_hi;
 	u32 initiator_misc_lo;
 };

 struct sbp2_reconnect_orb {
 	u32 reserved1;
 	u32 reserved2;
 	u32 reserved3;
 	u32 reserved4;
 	u32 login_ID_misc;
 	u32 reserved5;
 	u32 status_FIFO_hi;
 	u32 status_FIFO_lo;
 };

 struct sbp2_logout_orb {
 	u32 reserved1;
 	u32 reserved2;
 	u32 reserved3;
 	u32 reserved4;
 	u32 login_ID_misc;
 	u32 reserved5;
 	u32 status_FIFO_hi;
 	u32 status_FIFO_lo;
 };

 #define PAGE_TABLE_SET_SEGMENT_BASE_HI(value)   (value & 0xffff)
 #define PAGE_TABLE_SET_SEGMENT_LENGTH(value)    ((value & 0xffff) << 16)

 struct sbp2_unrestricted_page_table {
 	u32 length_segment_base_hi;
 	u32 segment_base_lo;
 };

 #define RESP_STATUS_REQUEST_COMPLETE		0x0
 #define RESP_STATUS_TRANSPORT_FAILURE		0x1
 #define RESP_STATUS_ILLEGAL_REQUEST		0x2
 #define RESP_STATUS_VENDOR_DEPENDENT		0x3

 #define SBP2_STATUS_NO_ADDITIONAL_INFO		0x0
 #define SBP2_STATUS_REQ_TYPE_NOT_SUPPORTED	0x1
 #define SBP2_STATUS_SPEED_NOT_SUPPORTED		0x2
 #define SBP2_STATUS_PAGE_SIZE_NOT_SUPPORTED	0x3
 #define SBP2_STATUS_ACCESS_DENIED		0x4
 #define SBP2_STATUS_LU_NOT_SUPPORTED		0x5
 #define SBP2_STATUS_MAX_PAYLOAD_TOO_SMALL	0x6
 #define SBP2_STATUS_RESOURCES_UNAVAILABLE	0x8
 #define SBP2_STATUS_FUNCTION_REJECTED		0x9
 #define SBP2_STATUS_LOGIN_ID_NOT_RECOGNIZED	0xa
 #define SBP2_STATUS_DUMMY_ORB_COMPLETED		0xb
 #define SBP2_STATUS_REQUEST_ABORTED		0xc
 #define SBP2_STATUS_UNSPECIFIED_ERROR		0xff

 #define SFMT_CURRENT_ERROR			0x0
 #define SFMT_DEFERRED_ERROR			0x1
 #define SFMT_VENDOR_DEPENDENT_STATUS		0x3

 #define SBP2_SCSI_STATUS_GOOD			0x0
 #define SBP2_SCSI_STATUS_CHECK_CONDITION	0x2
 #define SBP2_SCSI_STATUS_CONDITION_MET		0x4
 #define SBP2_SCSI_STATUS_BUSY			0x8
 #define SBP2_SCSI_STATUS_RESERVATION_CONFLICT	0x18
 #define SBP2_SCSI_STATUS_COMMAND_TERMINATED	0x22

 #define SBP2_SCSI_STATUS_SELECTION_TIMEOUT	0xff

 #define STATUS_GET_ORB_OFFSET_HI(value)         (value & 0xffff)
 #define STATUS_GET_SBP_STATUS(value)            ((value >> 16) & 0xff)
 #define STATUS_GET_LENGTH(value)                ((value >> 24) & 0x7)
 #define STATUS_GET_DEAD_BIT(value)              ((value >> 27) & 0x1)
 #define STATUS_GET_RESP(value)                  ((value >> 28) & 0x3)
 #define STATUS_GET_SRC(value)                   ((value >> 30) & 0x3)

 struct sbp2_status_block {
 	u32 ORB_offset_hi_misc;
 	u32 ORB_offset_lo;
 	u8 command_set_dependent[24];
 };

 /*
  * Miscellaneous SBP2 related config rom defines
  */

 /* The status fifo address definition below is used as a base for each
  * node, which a chunk seperately assigned to each unit directory in the
  * node.  For example, 0xfffe00000000ULL is used for the first sbp2 device
  * detected on node 0, 0xfffe00000020ULL for the next sbp2 device on node
  * 0, and so on.
  *
  * Note: We could use a single status fifo address for all sbp2 devices,
  * and figure out which sbp2 device the status belongs to by looking at
  * the source node id of the status write... but, using separate addresses
  * for each sbp2 unit directory allows for better code and the ability to
  * support multiple luns within a single 1394 node.
  *
  * Also note that we choose the address range below as it is a region
  * specified for write posting, where the ohci controller will
  * automatically send an ack_complete when the status is written by the
  * sbp2 device... saving a split transaction.   =)
  */
 #define SBP2_STATUS_FIFO_ADDRESS				0xfffe00000000ULL
 #define SBP2_STATUS_FIFO_ADDRESS_HI                             0xfffe
 #define SBP2_STATUS_FIFO_ADDRESS_LO                             0x0

 #define SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(entry)			((entry) << 5)
 #define SBP2_STATUS_FIFO_OFFSET_TO_ENTRY(offset)		((offset) >> 5)

 #define SBP2_UNIT_DIRECTORY_OFFSET_KEY				0xd1
 #define SBP2_CSR_OFFSET_KEY					0x54
 #define SBP2_UNIT_SPEC_ID_KEY					0x12
 #define SBP2_UNIT_SW_VERSION_KEY				0x13
 #define SBP2_COMMAND_SET_SPEC_ID_KEY				0x38
 #define SBP2_COMMAND_SET_KEY					0x39
 #define SBP2_UNIT_CHARACTERISTICS_KEY				0x3a
 #define SBP2_DEVICE_TYPE_AND_LUN_KEY				0x14
 #define SBP2_FIRMWARE_REVISION_KEY				0x3c

 #define SBP2_AGENT_STATE_OFFSET					0x00ULL
 #define SBP2_AGENT_RESET_OFFSET					0x04ULL
 #define SBP2_ORB_POINTER_OFFSET					0x08ULL
 #define SBP2_DOORBELL_OFFSET					0x10ULL
 #define SBP2_UNSOLICITED_STATUS_ENABLE_OFFSET			0x14ULL
 #define SBP2_UNSOLICITED_STATUS_VALUE				0xf

 #define SBP2_BUSY_TIMEOUT_ADDRESS				0xfffff0000210ULL
 #define SBP2_BUSY_TIMEOUT_VALUE					0xf

 #define SBP2_AGENT_RESET_DATA					0xf

 /*
  * Unit spec id and sw version entry for SBP-2 devices
  */

 #define SBP2_UNIT_SPEC_ID_ENTRY					0x0000609e
 #define SBP2_SW_VERSION_ENTRY					0x00010483

 /*
  * Other misc defines
  */
 #define SBP2_128KB_BROKEN_FIRMWARE				0xa0b800

 /*
  * SCSI specific stuff
  */

 #define SBP2_MAX_SG_ELEMENT_LENGTH	0xf000
 #define SBP2_MAX_UDS_PER_NODE		16	/* Maximum scsi devices per node */
 #define SBP2_MAX_SECTORS		255	/* Max sectors supported */
 #define SBP2_MAX_CMDS			8	/* This should be safe */

 /* This is the two dma types we use for cmd_dma below */
 enum cmd_dma_types {
 	CMD_DMA_NONE,
 	CMD_DMA_PAGE,
 	CMD_DMA_SINGLE
 };

 /*
  * Encapsulates all the info necessary for an outstanding command.
  */
 struct sbp2_command_info {

 	struct list_head list;
 	struct sbp2_command_orb command_orb ____cacheline_aligned;
 	dma_addr_t command_orb_dma ____cacheline_aligned;
 	struct scsi_cmnd *Current_SCpnt;
 	void (*Current_done)(struct scsi_cmnd *);

 	/* Also need s/g structure for each sbp2 command */
 	struct sbp2_unrestricted_page_table scatter_gather_element[SG_ALL] ____cacheline_aligned;
 	dma_addr_t sge_dma ____cacheline_aligned;
 	void *sge_buffer;
 	dma_addr_t cmd_dma;
 	enum cmd_dma_types dma_type;
 	unsigned long dma_size;
 	int dma_dir;

 };

 /* A list of flags for detected oddities and brokeness. */
 #define SBP2_BREAKAGE_128K_MAX_TRANSFER		0x1
 #define SBP2_BREAKAGE_INQUIRY_HACK		0x2

 struct sbp2scsi_host_info;

 /*
  * Information needed on a per scsi id basis (one for each sbp2 device)
  */
 struct scsi_id_instance_data {
 	/*
 	 * Various sbp2 specific structures
 	 */
 	struct sbp2_command_orb *last_orb;
 	dma_addr_t last_orb_dma;
 	struct sbp2_login_orb *login_orb;
 	dma_addr_t login_orb_dma;
 	struct sbp2_login_response *login_response;
 	dma_addr_t login_response_dma;
 	struct sbp2_query_logins_orb *query_logins_orb;
 	dma_addr_t query_logins_orb_dma;
 	struct sbp2_query_logins_response *query_logins_response;
 	dma_addr_t query_logins_response_dma;
 	struct sbp2_reconnect_orb *reconnect_orb;
 	dma_addr_t reconnect_orb_dma;
 	struct sbp2_logout_orb *logout_orb;
 	dma_addr_t logout_orb_dma;
 	struct sbp2_status_block status_block;

 	/*
 	 * Stuff we need to know about the sbp2 device itself
 	 */
 	u64 sbp2_management_agent_addr;
 	u64 sbp2_command_block_agent_addr;
 	u32 speed_code;
 	u32 max_payload_size;

 	/*
 	 * Values pulled from the device's unit directory
 	 */
 	u32 sbp2_command_set_spec_id;
 	u32 sbp2_command_set;
 	u32 sbp2_unit_characteristics;
 	u32 sbp2_lun;
 	u32 sbp2_firmware_revision;

 	/*
 	 * Variable used for logins, reconnects, logouts, query logins
 	 */
 	atomic_t sbp2_login_complete;

 	/*
 	 * Pool of command orbs, so we can have more than overlapped command per id
 	 */
 	spinlock_t sbp2_command_orb_lock;
 	struct list_head sbp2_command_orb_inuse;
 	struct list_head sbp2_command_orb_completed;

 	struct list_head scsi_list;

 	/* Node entry, as retrieved from NodeMgr entries */
 	struct node_entry *ne;
 	struct unit_directory *ud;

 	/* A backlink to our host_info */
 	struct sbp2scsi_host_info *hi;

 	/* SCSI related pointers */
 	struct scsi_device *sdev;
 	struct Scsi_Host *scsi_host;

 	/* Device specific workarounds/brokeness */
 	u32 workarounds;
 };

 /* Sbp2 host data structure (one per IEEE1394 host) */
 struct sbp2scsi_host_info {
 	struct hpsb_host *host;		/* IEEE1394 host */
 	struct list_head scsi_ids;	/* List of scsi ids on this host */
 };

 /*
  * Function prototypes
  */

 /*
  * Various utility prototypes
  */
 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id);
 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id);
 static struct sbp2_command_info *sbp2util_find_command_for_orb(struct scsi_id_instance_data *scsi_id, dma_addr_t orb);
 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt);
 static struct sbp2_command_info *sbp2util_allocate_command_orb(struct scsi_id_instance_data *scsi_id,
 							  struct scsi_cmnd *Current_SCpnt,
 							  void (*Current_done)(struct scsi_cmnd *));
 static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id,
 		struct sbp2_command_info *command);


 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id);
 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id);

 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
                                      u64 addr, size_t length, u16 flags);
 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
                                     u64 addr, size_t length, u16 flags);
 #endif

 /*
  * SBP-2 protocol related prototypes
  */
 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id);
 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id);
 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id);
 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id);
 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
 				    quadlet_t *data, u64 addr, size_t length, u16 flags);
 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait);
 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
 				 struct sbp2_command_info *command);
 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
 			     struct scsi_cmnd *SCpnt,
 			     void (*done)(struct scsi_cmnd *));
 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data);
 static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
 				     struct scsi_cmnd *SCpnt);
 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
 				      struct unit_directory *ud);
 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id);
 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id);

 #endif /* SBP2_H */
	/*
	* sbp2.h - Defines and prototypes for sbp2.c
	*
	* Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
	* jamesg@filanet.com
	*
	* 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
	* (at your option) 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*/

	#ifndef SBP2_H
	#define SBP2_H

	#define SBP2_DEVICE_NAME "sbp2"

	/*
	* SBP2 specific structures and defines
	*/

	#define ORB_DIRECTION_WRITE_TO_MEDIA 0x0
	#define ORB_DIRECTION_READ_FROM_MEDIA 0x1
	#define ORB_DIRECTION_NO_DATA_TRANSFER 0x2

	#define ORB_SET_NULL_PTR(value) ((value & 0x1) << 31)
	#define ORB_SET_NOTIFY(value) ((value & 0x1) << 31)
	#define ORB_SET_RQ_FMT(value) ((value & 0x3) << 29) /* unused ? */
	#define ORB_SET_NODE_ID(value) ((value & 0xffff) << 16)
	#define ORB_SET_DATA_SIZE(value) (value & 0xffff)
	#define ORB_SET_PAGE_SIZE(value) ((value & 0x7) << 16)
	#define ORB_SET_PAGE_TABLE_PRESENT(value) ((value & 0x1) << 19)
	#define ORB_SET_MAX_PAYLOAD(value) ((value & 0xf) << 20)
	#define ORB_SET_SPEED(value) ((value & 0x7) << 24)
	#define ORB_SET_DIRECTION(value) ((value & 0x1) << 27)

	struct sbp2_command_orb {
	volatile u32 next_ORB_hi;
	volatile u32 next_ORB_lo;
	u32 data_descriptor_hi;
	u32 data_descriptor_lo;
	u32 misc;
	u8 cdb[12];
	};

	#define SBP2_LOGIN_REQUEST 0x0
	#define SBP2_QUERY_LOGINS_REQUEST 0x1
	#define SBP2_RECONNECT_REQUEST 0x3
	#define SBP2_SET_PASSWORD_REQUEST 0x4
	#define SBP2_LOGOUT_REQUEST 0x7
	#define SBP2_ABORT_TASK_REQUEST 0xb
	#define SBP2_ABORT_TASK_SET 0xc
	#define SBP2_LOGICAL_UNIT_RESET 0xe
	#define SBP2_TARGET_RESET_REQUEST 0xf

	#define ORB_SET_LUN(value) (value & 0xffff)
	#define ORB_SET_FUNCTION(value) ((value & 0xf) << 16)
	#define ORB_SET_RECONNECT(value) ((value & 0xf) << 20)
	#define ORB_SET_EXCLUSIVE(value) ((value & 0x1) << 28)
	#define ORB_SET_LOGIN_RESP_LENGTH(value) (value & 0xffff)
	#define ORB_SET_PASSWD_LENGTH(value) ((value & 0xffff) << 16)

	struct sbp2_login_orb {
	u32 password_hi;
	u32 password_lo;
	u32 login_response_hi;
	u32 login_response_lo;
	u32 lun_misc;
	u32 passwd_resp_lengths;
	u32 status_FIFO_hi;
	u32 status_FIFO_lo;
	};

	#define RESPONSE_GET_LOGIN_ID(value) (value & 0xffff)
	#define RESPONSE_GET_LENGTH(value) ((value >> 16) & 0xffff)
	#define RESPONSE_GET_RECONNECT_HOLD(value) (value & 0xffff)

	struct sbp2_login_response {
	u32 length_login_ID;
	u32 command_block_agent_hi;
	u32 command_block_agent_lo;
	u32 reconnect_hold;
	};

	#define ORB_SET_LOGIN_ID(value) (value & 0xffff)

	#define ORB_SET_QUERY_LOGINS_RESP_LENGTH(value) (value & 0xffff)

	struct sbp2_query_logins_orb {
	u32 reserved1;
	u32 reserved2;
	u32 query_response_hi;
	u32 query_response_lo;
	u32 lun_misc;
	u32 reserved_resp_length;
	u32 status_FIFO_hi;
	u32 status_FIFO_lo;
	};

	#define RESPONSE_GET_MAX_LOGINS(value) (value & 0xffff)
	#define RESPONSE_GET_ACTIVE_LOGINS(value) ((RESPONSE_GET_LENGTH(value) - 4) / 12)

	struct sbp2_query_logins_response {
	u32 length_max_logins;
	u32 misc_IDs;
	u32 initiator_misc_hi;
	u32 initiator_misc_lo;
	};

	struct sbp2_reconnect_orb {
	u32 reserved1;
	u32 reserved2;
	u32 reserved3;
	u32 reserved4;
	u32 login_ID_misc;
	u32 reserved5;
	u32 status_FIFO_hi;
	u32 status_FIFO_lo;
	};

	struct sbp2_logout_orb {
	u32 reserved1;
	u32 reserved2;
	u32 reserved3;
	u32 reserved4;
	u32 login_ID_misc;
	u32 reserved5;
	u32 status_FIFO_hi;
	u32 status_FIFO_lo;
	};

	#define PAGE_TABLE_SET_SEGMENT_BASE_HI(value) (value & 0xffff)
	#define PAGE_TABLE_SET_SEGMENT_LENGTH(value) ((value & 0xffff) << 16)

	struct sbp2_unrestricted_page_table {
	u32 length_segment_base_hi;
	u32 segment_base_lo;
	};

	#define RESP_STATUS_REQUEST_COMPLETE 0x0
	#define RESP_STATUS_TRANSPORT_FAILURE 0x1
	#define RESP_STATUS_ILLEGAL_REQUEST 0x2
	#define RESP_STATUS_VENDOR_DEPENDENT 0x3

	#define SBP2_STATUS_NO_ADDITIONAL_INFO 0x0
	#define SBP2_STATUS_REQ_TYPE_NOT_SUPPORTED 0x1
	#define SBP2_STATUS_SPEED_NOT_SUPPORTED 0x2
	#define SBP2_STATUS_PAGE_SIZE_NOT_SUPPORTED 0x3
	#define SBP2_STATUS_ACCESS_DENIED 0x4
	#define SBP2_STATUS_LU_NOT_SUPPORTED 0x5
	#define SBP2_STATUS_MAX_PAYLOAD_TOO_SMALL 0x6
	#define SBP2_STATUS_RESOURCES_UNAVAILABLE 0x8
	#define SBP2_STATUS_FUNCTION_REJECTED 0x9
	#define SBP2_STATUS_LOGIN_ID_NOT_RECOGNIZED 0xa
	#define SBP2_STATUS_DUMMY_ORB_COMPLETED 0xb
	#define SBP2_STATUS_REQUEST_ABORTED 0xc
	#define SBP2_STATUS_UNSPECIFIED_ERROR 0xff

	#define SFMT_CURRENT_ERROR 0x0
	#define SFMT_DEFERRED_ERROR 0x1
	#define SFMT_VENDOR_DEPENDENT_STATUS 0x3

	#define SBP2_SCSI_STATUS_GOOD 0x0
	#define SBP2_SCSI_STATUS_CHECK_CONDITION 0x2
	#define SBP2_SCSI_STATUS_CONDITION_MET 0x4
	#define SBP2_SCSI_STATUS_BUSY 0x8
	#define SBP2_SCSI_STATUS_RESERVATION_CONFLICT 0x18
	#define SBP2_SCSI_STATUS_COMMAND_TERMINATED 0x22

	#define SBP2_SCSI_STATUS_SELECTION_TIMEOUT 0xff

	#define STATUS_GET_ORB_OFFSET_HI(value) (value & 0xffff)
	#define STATUS_GET_SBP_STATUS(value) ((value >> 16) & 0xff)
	#define STATUS_GET_LENGTH(value) ((value >> 24) & 0x7)
	#define STATUS_GET_DEAD_BIT(value) ((value >> 27) & 0x1)
	#define STATUS_GET_RESP(value) ((value >> 28) & 0x3)
	#define STATUS_GET_SRC(value) ((value >> 30) & 0x3)

	struct sbp2_status_block {
	u32 ORB_offset_hi_misc;
	u32 ORB_offset_lo;
	u8 command_set_dependent[24];
	};

	/*
	* Miscellaneous SBP2 related config rom defines
	*/

	/* The status fifo address definition below is used as a base for each
	* node, which a chunk seperately assigned to each unit directory in the
	* node. For example, 0xfffe00000000ULL is used for the first sbp2 device
	* detected on node 0, 0xfffe00000020ULL for the next sbp2 device on node
	* 0, and so on.
	*
	* Note: We could use a single status fifo address for all sbp2 devices,
	* and figure out which sbp2 device the status belongs to by looking at
	* the source node id of the status write... but, using separate addresses
	* for each sbp2 unit directory allows for better code and the ability to
	* support multiple luns within a single 1394 node.
	*
	* Also note that we choose the address range below as it is a region
	* specified for write posting, where the ohci controller will
	* automatically send an ack_complete when the status is written by the
	* sbp2 device... saving a split transaction. =)
	*/
	#define SBP2_STATUS_FIFO_ADDRESS 0xfffe00000000ULL
	#define SBP2_STATUS_FIFO_ADDRESS_HI 0xfffe
	#define SBP2_STATUS_FIFO_ADDRESS_LO 0x0

	#define SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(entry) ((entry) << 5)
	#define SBP2_STATUS_FIFO_OFFSET_TO_ENTRY(offset) ((offset) >> 5)

	#define SBP2_UNIT_DIRECTORY_OFFSET_KEY 0xd1
	#define SBP2_CSR_OFFSET_KEY 0x54
	#define SBP2_UNIT_SPEC_ID_KEY 0x12
	#define SBP2_UNIT_SW_VERSION_KEY 0x13
	#define SBP2_COMMAND_SET_SPEC_ID_KEY 0x38
	#define SBP2_COMMAND_SET_KEY 0x39
	#define SBP2_UNIT_CHARACTERISTICS_KEY 0x3a
	#define SBP2_DEVICE_TYPE_AND_LUN_KEY 0x14
	#define SBP2_FIRMWARE_REVISION_KEY 0x3c

	#define SBP2_AGENT_STATE_OFFSET 0x00ULL
	#define SBP2_AGENT_RESET_OFFSET 0x04ULL
	#define SBP2_ORB_POINTER_OFFSET 0x08ULL
	#define SBP2_DOORBELL_OFFSET 0x10ULL
	#define SBP2_UNSOLICITED_STATUS_ENABLE_OFFSET 0x14ULL
	#define SBP2_UNSOLICITED_STATUS_VALUE 0xf

	#define SBP2_BUSY_TIMEOUT_ADDRESS 0xfffff0000210ULL
	#define SBP2_BUSY_TIMEOUT_VALUE 0xf

	#define SBP2_AGENT_RESET_DATA 0xf

	/*
	* Unit spec id and sw version entry for SBP-2 devices
	*/

	#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
	#define SBP2_SW_VERSION_ENTRY 0x00010483

	/*
	* Other misc defines
	*/
	#define SBP2_128KB_BROKEN_FIRMWARE 0xa0b800

	/*
	* SCSI specific stuff
	*/

	#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
	#define SBP2_MAX_UDS_PER_NODE 16 /* Maximum scsi devices per node */
	#define SBP2_MAX_SECTORS 255 /* Max sectors supported */
	#define SBP2_MAX_CMDS 8 /* This should be safe */

	/* This is the two dma types we use for cmd_dma below */
	enum cmd_dma_types {
	CMD_DMA_NONE,
	CMD_DMA_PAGE,
	CMD_DMA_SINGLE
	};

	/*
	* Encapsulates all the info necessary for an outstanding command.
	*/
	struct sbp2_command_info {

	struct list_head list;
	struct sbp2_command_orb command_orb ____cacheline_aligned;
	dma_addr_t command_orb_dma ____cacheline_aligned;
	struct scsi_cmnd *Current_SCpnt;
	void (Current_done)(struct scsi_cmnd );

	/* Also need s/g structure for each sbp2 command */
	struct sbp2_unrestricted_page_table scatter_gather_element[SG_ALL] ____cacheline_aligned;
	dma_addr_t sge_dma ____cacheline_aligned;
	void *sge_buffer;
	dma_addr_t cmd_dma;
	enum cmd_dma_types dma_type;
	unsigned long dma_size;
	int dma_dir;

	};

	/* A list of flags for detected oddities and brokeness. */
	#define SBP2_BREAKAGE_128K_MAX_TRANSFER 0x1
	#define SBP2_BREAKAGE_INQUIRY_HACK 0x2

	struct sbp2scsi_host_info;

	/*
	* Information needed on a per scsi id basis (one for each sbp2 device)
	*/
	struct scsi_id_instance_data {
	/*
	* Various sbp2 specific structures
	*/
	struct sbp2_command_orb *last_orb;
	dma_addr_t last_orb_dma;
	struct sbp2_login_orb *login_orb;
	dma_addr_t login_orb_dma;
	struct sbp2_login_response *login_response;
	dma_addr_t login_response_dma;
	struct sbp2_query_logins_orb *query_logins_orb;
	dma_addr_t query_logins_orb_dma;
	struct sbp2_query_logins_response *query_logins_response;
	dma_addr_t query_logins_response_dma;
	struct sbp2_reconnect_orb *reconnect_orb;
	dma_addr_t reconnect_orb_dma;
	struct sbp2_logout_orb *logout_orb;
	dma_addr_t logout_orb_dma;
	struct sbp2_status_block status_block;

	/*
	* Stuff we need to know about the sbp2 device itself
	*/
	u64 sbp2_management_agent_addr;
	u64 sbp2_command_block_agent_addr;
	u32 speed_code;
	u32 max_payload_size;

	/*
	* Values pulled from the device's unit directory
	*/
	u32 sbp2_command_set_spec_id;
	u32 sbp2_command_set;
	u32 sbp2_unit_characteristics;
	u32 sbp2_lun;
	u32 sbp2_firmware_revision;

	/*
	* Variable used for logins, reconnects, logouts, query logins
	*/
	atomic_t sbp2_login_complete;

	/*
	* Pool of command orbs, so we can have more than overlapped command per id
	*/
	spinlock_t sbp2_command_orb_lock;
	struct list_head sbp2_command_orb_inuse;
	struct list_head sbp2_command_orb_completed;

	struct list_head scsi_list;

	/* Node entry, as retrieved from NodeMgr entries */
	struct node_entry *ne;
	struct unit_directory *ud;

	/* A backlink to our host_info */
	struct sbp2scsi_host_info *hi;

	/* SCSI related pointers */
	struct scsi_device *sdev;
	struct Scsi_Host *scsi_host;

	/* Device specific workarounds/brokeness */
	u32 workarounds;
	};

	/* Sbp2 host data structure (one per IEEE1394 host) */
	struct sbp2scsi_host_info {
	struct hpsb_host host; / IEEE1394 host */
	struct list_head scsi_ids; /* List of scsi ids on this host */
	};

	/*
	* Function prototypes
	*/

	/*
	* Various utility prototypes
	*/
	static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id);
	static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id);
	static struct sbp2_command_info sbp2util_find_command_for_orb(struct scsi_id_instance_data scsi_id, dma_addr_t orb);
	static struct sbp2_command_info sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data scsi_id, void *SCpnt);
	static struct sbp2_command_info sbp2util_allocate_command_orb(struct scsi_id_instance_data scsi_id,
	struct scsi_cmnd *Current_SCpnt,
	void (Current_done)(struct scsi_cmnd ));
	static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id,
	struct sbp2_command_info *command);


	static int sbp2_start_device(struct scsi_id_instance_data *scsi_id);
	static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id);

	#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
	static int sbp2_handle_physdma_write(struct hpsb_host host, int nodeid, int destid, quadlet_t data,
	u64 addr, size_t length, u16 flags);
	static int sbp2_handle_physdma_read(struct hpsb_host host, int nodeid, quadlet_t data,
	u64 addr, size_t length, u16 flags);
	#endif

	/*
	* SBP-2 protocol related prototypes
	*/
	static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id);
	static int sbp2_login_device(struct scsi_id_instance_data *scsi_id);
	static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id);
	static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id);
	static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
	quadlet_t *data, u64 addr, size_t length, u16 flags);
	static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait);
	static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
	struct sbp2_command_info *command);
	static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
	struct scsi_cmnd *SCpnt,
	void (done)(struct scsi_cmnd ));
	static unsigned int sbp2_status_to_sense_data(unchar sbp2_status, unchar sense_data);
	static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
	struct scsi_cmnd *SCpnt);
	static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
	struct unit_directory *ud);
	static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id);
	static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id);

	#endif /* SBP2_H */