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linux-next/drivers/ieee1394/sbp2.h
Al Viro 631e8a1398 [SCSI] TYPE_RBC cache fixes (sbp2.c affected) 
a) TYPE_SDAD renamed to TYPE_RBC and taken to scsi.h
	b) in sbp2.c remapping of TYPE_RPB to TYPE_DISK turned off
	c) relevant places in midlayer and sd.c taught to accept TYPE_RBC
	d) sd.c::sd_read_cache_type() looks into page 6 when dealing with
TYPE_RBC - these guys have writeback cache flag there and are not guaranteed
to have page 8 at all.
	e) sd_read_cache_type() got an extra sanity check - it checks that
it got the page it asked for before using its contents.  And screams if
mismatch had happened.  Rationale: there are broken devices out there that
are "helpful" enough to go for "I don't have a page you've asked for, here,
have another one".  For example, PL3507 had been caught doing just that...
	f) sbp2 sets sdev->use_10_for_rw and sdev->use_10_for_ms instead
of bothering to remap READ6/WRITE6/MOD_SENSE, so most of the conversions
in there are gone now.

	Incidentally, I wonder if USB storage devices that have no
mode page 8 are simply RBC ones.  I haven't touched that, but it might
be interesting to check...

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-26 08:41:15 -05:00

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/*
* 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_DEVICE_TYPE(q) (((q) >> 16) & 0x1f)
#define SBP2_DEVICE_LUN(q) ((q) & 0xffff)
#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
#define SBP2_DEVICE_TYPE_LUN_UNINITIALIZED 0xffffffff
/*
* 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 */
/*
* SCSI direction table...
* (now used as a back-up in case the direction passed down from above is "unknown")
*
* DIN = IN data direction
* DOU = OUT data direction
* DNO = No data transfer
* DUN = Unknown data direction
*
* Opcode 0xec (Teac specific "opc execute") possibly should be DNO,
* but we'll change it when somebody reports a problem with this.
*/
#define DIN ORB_DIRECTION_READ_FROM_MEDIA
#define DOU ORB_DIRECTION_WRITE_TO_MEDIA
#define DNO ORB_DIRECTION_NO_DATA_TRANSFER
#define DUN DIN
static unchar sbp2scsi_direction_table[0x100] = {
DNO,DNO,DIN,DIN,DOU,DIN,DIN,DOU,DIN,DUN,DOU,DOU,DUN,DUN,DUN,DIN,
DNO,DIN,DIN,DOU,DIN,DOU,DNO,DNO,DOU,DNO,DIN,DNO,DIN,DOU,DNO,DUN,
DIN,DUN,DIN,DIN,DOU,DIN,DUN,DUN,DIN,DIN,DOU,DNO,DUN,DIN,DOU,DOU,
DOU,DOU,DOU,DNO,DIN,DNO,DNO,DIN,DOU,DOU,DOU,DOU,DIN,DOU,DIN,DOU,
DOU,DOU,DIN,DIN,DIN,DNO,DIN,DNO,DNO,DNO,DUN,DNO,DOU,DIN,DNO,DUN,
DUN,DIN,DIN,DNO,DNO,DOU,DUN,DUN,DNO,DIN,DIN,DNO,DIN,DOU,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DNO,DOU,DOU,DIN,DNO,DNO,DNO,DIN,DNO,DOU,DUN,DNO,DIN,DOU,DOU,
DOU,DOU,DOU,DNO,DUN,DIN,DOU,DIN,DIN,DIN,DNO,DNO,DNO,DIN,DIN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DOU,DUN,DUN,DUN,DUN,DUN,
DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN
};
/* This should be safe */
#define SBP2_MAX_CMDS 8
/* 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_device_type_and_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_create_command_orb(struct scsi_id_instance_data *scsi_id,
struct sbp2_command_info *command,
unchar *scsi_cmd,
unsigned int scsi_use_sg,
unsigned int scsi_request_bufflen,
void *scsi_request_buffer,
enum dma_data_direction dma_dir);
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_command(struct scsi_id_instance_data *scsi_id, unchar *cmd);
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 */
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