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Merge mulgrave-w:git/scsi-misc-2.6

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Conflicts:

	drivers/scsi/iscsi_tcp.c
	drivers/scsi/iscsi_tcp.h

Pretty horrible merge between crypto hash consolidation
and crypto_digest_...->crypto_hash_... conversion

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2006-09-23 15:33:43 -05:00
parent 3eeab61aa3 2d2f8d59b1
commit c9802cd957
125 changed files with 25925 additions and 1209 deletions
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56
Documentation/scsi/ChangeLog.arcmsr Normal file
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**************************************************************************
** History
**
** REV# DATE NAME DESCRIPTION
** 1.00.00.00 3/31/2004 Erich Chen First release
** 1.10.00.04 7/28/2004 Erich Chen modify for ioctl
** 1.10.00.06 8/28/2004 Erich Chen modify for 2.6.x
** 1.10.00.08 9/28/2004 Erich Chen modify for x86_64
** 1.10.00.10 10/10/2004 Erich Chen bug fix for SMP & ioctl
** 1.20.00.00 11/29/2004 Erich Chen bug fix with arcmsr_bus_reset when PHY error
** 1.20.00.02 12/09/2004 Erich Chen bug fix with over 2T bytes RAID Volume
** 1.20.00.04 1/09/2005 Erich Chen fits for Debian linux kernel version 2.2.xx
** 1.20.00.05 2/20/2005 Erich Chen cleanly as look like a Linux driver at 2.6.x
** thanks for peoples kindness comment
** Kornel Wieliczek
** Christoph Hellwig
** Adrian Bunk
** Andrew Morton
** Christoph Hellwig
** James Bottomley
** Arjan van de Ven
** 1.20.00.06 3/12/2005 Erich Chen fix with arcmsr_pci_unmap_dma "unsigned long" cast,
** modify PCCB POOL allocated by "dma_alloc_coherent"
** (Kornel Wieliczek's comment)
** 1.20.00.07 3/23/2005 Erich Chen bug fix with arcmsr_scsi_host_template_init
** occur segmentation fault,
** if RAID adapter does not on PCI slot
** and modprobe/rmmod this driver twice.
** bug fix enormous stack usage (Adrian Bunk's comment)
** 1.20.00.08 6/23/2005 Erich Chen bug fix with abort command,
** in case of heavy loading when sata cable
** working on low quality connection
** 1.20.00.09 9/12/2005 Erich Chen bug fix with abort command handling, firmware version check
** and firmware update notify for hardware bug fix
** 1.20.00.10 9/23/2005 Erich Chen enhance sysfs function for change driver's max tag Q number.
** add DMA_64BIT_MASK for backward compatible with all 2.6.x
** add some useful message for abort command
** add ioctl code 'ARCMSR_IOCTL_FLUSH_ADAPTER_CACHE'
** customer can send this command for sync raid volume data
** 1.20.00.11 9/29/2005 Erich Chen by comment of Arjan van de Ven fix incorrect msleep redefine
** cast off sizeof(dma_addr_t) condition for 64bit pci_set_dma_mask
** 1.20.00.12 9/30/2005 Erich Chen bug fix with 64bit platform's ccbs using if over 4G system memory
** change 64bit pci_set_consistent_dma_mask into 32bit
** increcct adapter count if adapter initialize fail.
** miss edit at arcmsr_build_ccb....
** psge += sizeof(struct _SG64ENTRY *) =>
** psge += sizeof(struct _SG64ENTRY)
** 64 bits sg entry would be incorrectly calculated
** thanks Kornel Wieliczek give me kindly notify
** and detail description
** 1.20.00.13 11/15/2005 Erich Chen scheduling pending ccb with FIFO
** change the architecture of arcmsr command queue list
** for linux standard list
** enable usage of pci message signal interrupt
** follow Randy.Danlup kindness suggestion cleanup this code
**************************************************************************

574
Documentation/scsi/arcmsr_spec.txt Normal file
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*******************************************************************************
** ARECA FIRMWARE SPEC
*******************************************************************************
** Usage of IOP331 adapter
** (All In/Out is in IOP331's view)
** 1. Message 0 --> InitThread message and retrun code
** 2. Doorbell is used for RS-232 emulation
** inDoorBell : bit0 -- data in ready
** (DRIVER DATA WRITE OK)
** bit1 -- data out has been read
** (DRIVER DATA READ OK)
** outDooeBell: bit0 -- data out ready
** (IOP331 DATA WRITE OK)
** bit1 -- data in has been read
** (IOP331 DATA READ OK)
** 3. Index Memory Usage
** offset 0xf00 : for RS232 out (request buffer)
** offset 0xe00 : for RS232 in (scratch buffer)
** offset 0xa00 : for inbound message code message_rwbuffer
** (driver send to IOP331)
** offset 0xa00 : for outbound message code message_rwbuffer
** (IOP331 send to driver)
** 4. RS-232 emulation
** Currently 128 byte buffer is used
** 1st uint32_t : Data length (1--124)
** Byte 4--127 : Max 124 bytes of data
** 5. PostQ
** All SCSI Command must be sent through postQ:
** (inbound queue port) Request frame must be 32 bytes aligned
** #bit27--bit31 => flag for post ccb
** #bit0--bit26 => real address (bit27--bit31) of post arcmsr_cdb
** bit31 :
** 0 : 256 bytes frame
** 1 : 512 bytes frame
** bit30 :
** 0 : normal request
** 1 : BIOS request
** bit29 : reserved
** bit28 : reserved
** bit27 : reserved
** ---------------------------------------------------------------------------
** (outbount queue port) Request reply
** #bit27--bit31
** => flag for reply
** #bit0--bit26
** => real address (bit27--bit31) of reply arcmsr_cdb
** bit31 : must be 0 (for this type of reply)
** bit30 : reserved for BIOS handshake
** bit29 : reserved
** bit28 :
** 0 : no error, ignore AdapStatus/DevStatus/SenseData
** 1 : Error, error code in AdapStatus/DevStatus/SenseData
** bit27 : reserved
** 6. BIOS request
** All BIOS request is the same with request from PostQ
** Except :
** Request frame is sent from configuration space
** offset: 0x78 : Request Frame (bit30 == 1)
** offset: 0x18 : writeonly to generate
** IRQ to IOP331
** Completion of request:
** (bit30 == 0, bit28==err flag)
** 7. Definition of SGL entry (structure)
** 8. Message1 Out - Diag Status Code (????)
** 9. Message0 message code :
** 0x00 : NOP
** 0x01 : Get Config
** ->offset 0xa00 :for outbound message code message_rwbuffer
** (IOP331 send to driver)
** Signature 0x87974060(4)
** Request len 0x00000200(4)
** numbers of queue 0x00000100(4)
** SDRAM Size 0x00000100(4)-->256 MB
** IDE Channels 0x00000008(4)
** vendor 40 bytes char
** model 8 bytes char
** FirmVer 16 bytes char
** Device Map 16 bytes char
** FirmwareVersion DWORD <== Added for checking of
** new firmware capability
** 0x02 : Set Config
** ->offset 0xa00 :for inbound message code message_rwbuffer
** (driver send to IOP331)
** Signature 0x87974063(4)
** UPPER32 of Request Frame (4)-->Driver Only
** 0x03 : Reset (Abort all queued Command)
** 0x04 : Stop Background Activity
** 0x05 : Flush Cache
** 0x06 : Start Background Activity
** (re-start if background is halted)
** 0x07 : Check If Host Command Pending
** (Novell May Need This Function)
** 0x08 : Set controller time
** ->offset 0xa00 : for inbound message code message_rwbuffer
** (driver to IOP331)
** byte 0 : 0xaa <-- signature
** byte 1 : 0x55 <-- signature
** byte 2 : year (04)
** byte 3 : month (1..12)
** byte 4 : date (1..31)
** byte 5 : hour (0..23)
** byte 6 : minute (0..59)
** byte 7 : second (0..59)
*******************************************************************************
*******************************************************************************
** RS-232 Interface for Areca Raid Controller
** The low level command interface is exclusive with VT100 terminal
** --------------------------------------------------------------------
** 1. Sequence of command execution
** --------------------------------------------------------------------
** (A) Header : 3 bytes sequence (0x5E, 0x01, 0x61)
** (B) Command block : variable length of data including length,
** command code, data and checksum byte
** (C) Return data : variable length of data
** --------------------------------------------------------------------
** 2. Command block
** --------------------------------------------------------------------
** (A) 1st byte : command block length (low byte)
** (B) 2nd byte : command block length (high byte)
** note ..command block length shouldn't > 2040 bytes,
** length excludes these two bytes
** (C) 3rd byte : command code
** (D) 4th and following bytes : variable length data bytes
** depends on command code
** (E) last byte : checksum byte (sum of 1st byte until last data byte)
** --------------------------------------------------------------------
** 3. Command code and associated data
** --------------------------------------------------------------------
** The following are command code defined in raid controller Command
** code 0x10--0x1? are used for system level management,
** no password checking is needed and should be implemented in separate
** well controlled utility and not for end user access.
** Command code 0x20--0x?? always check the password,
** password must be entered to enable these command.
** enum
** {
** GUI_SET_SERIAL=0x10,
** GUI_SET_VENDOR,
** GUI_SET_MODEL,
** GUI_IDENTIFY,
** GUI_CHECK_PASSWORD,
** GUI_LOGOUT,
** GUI_HTTP,
** GUI_SET_ETHERNET_ADDR,
** GUI_SET_LOGO,
** GUI_POLL_EVENT,
** GUI_GET_EVENT,
** GUI_GET_HW_MONITOR,
** // GUI_QUICK_CREATE=0x20, (function removed)
** GUI_GET_INFO_R=0x20,
** GUI_GET_INFO_V,
** GUI_GET_INFO_P,
** GUI_GET_INFO_S,
** GUI_CLEAR_EVENT,
** GUI_MUTE_BEEPER=0x30,
** GUI_BEEPER_SETTING,
** GUI_SET_PASSWORD,
** GUI_HOST_INTERFACE_MODE,
** GUI_REBUILD_PRIORITY,
** GUI_MAX_ATA_MODE,
** GUI_RESET_CONTROLLER,
** GUI_COM_PORT_SETTING,
** GUI_NO_OPERATION,
** GUI_DHCP_IP,
** GUI_CREATE_PASS_THROUGH=0x40,
** GUI_MODIFY_PASS_THROUGH,
** GUI_DELETE_PASS_THROUGH,
** GUI_IDENTIFY_DEVICE,
** GUI_CREATE_RAIDSET=0x50,
** GUI_DELETE_RAIDSET,
** GUI_EXPAND_RAIDSET,
** GUI_ACTIVATE_RAIDSET,
** GUI_CREATE_HOT_SPARE,
** GUI_DELETE_HOT_SPARE,
** GUI_CREATE_VOLUME=0x60,
** GUI_MODIFY_VOLUME,
** GUI_DELETE_VOLUME,
** GUI_START_CHECK_VOLUME,
** GUI_STOP_CHECK_VOLUME
** };
** Command description :
** GUI_SET_SERIAL : Set the controller serial#
** byte 0,1 : length
** byte 2 : command code 0x10
** byte 3 : password length (should be 0x0f)
** byte 4-0x13 : should be "ArEcATecHnoLogY"
** byte 0x14--0x23 : Serial number string (must be 16 bytes)
** GUI_SET_VENDOR : Set vendor string for the controller
** byte 0,1 : length
** byte 2 : command code 0x11
** byte 3 : password length (should be 0x08)
** byte 4-0x13 : should be "ArEcAvAr"
** byte 0x14--0x3B : vendor string (must be 40 bytes)
** GUI_SET_MODEL : Set the model name of the controller
** byte 0,1 : length
** byte 2 : command code 0x12
** byte 3 : password length (should be 0x08)
** byte 4-0x13 : should be "ArEcAvAr"
** byte 0x14--0x1B : model string (must be 8 bytes)
** GUI_IDENTIFY : Identify device
** byte 0,1 : length
** byte 2 : command code 0x13
** return "Areca RAID Subsystem "
** GUI_CHECK_PASSWORD : Verify password
** byte 0,1 : length
** byte 2 : command code 0x14
** byte 3 : password length
** byte 4-0x?? : user password to be checked
** GUI_LOGOUT : Logout GUI (force password checking on next command)
** byte 0,1 : length
** byte 2 : command code 0x15
** GUI_HTTP : HTTP interface (reserved for Http proxy service)(0x16)
**
** GUI_SET_ETHERNET_ADDR : Set the ethernet MAC address
** byte 0,1 : length
** byte 2 : command code 0x17
** byte 3 : password length (should be 0x08)
** byte 4-0x13 : should be "ArEcAvAr"
** byte 0x14--0x19 : Ethernet MAC address (must be 6 bytes)
** GUI_SET_LOGO : Set logo in HTTP
** byte 0,1 : length
** byte 2 : command code 0x18
** byte 3 : Page# (0/1/2/3) (0xff --> clear OEM logo)
** byte 4/5/6/7 : 0x55/0xaa/0xa5/0x5a
** byte 8 : TITLE.JPG data (each page must be 2000 bytes)
** note page0 1st 2 byte must be
** actual length of the JPG file
** GUI_POLL_EVENT : Poll If Event Log Changed
** byte 0,1 : length
** byte 2 : command code 0x19
** GUI_GET_EVENT : Read Event
** byte 0,1 : length
** byte 2 : command code 0x1a
** byte 3 : Event Page (0:1st page/1/2/3:last page)
** GUI_GET_HW_MONITOR : Get HW monitor data
** byte 0,1 : length
** byte 2 : command code 0x1b
** byte 3 : # of FANs(example 2)
** byte 4 : # of Voltage sensor(example 3)
** byte 5 : # of temperature sensor(example 2)
** byte 6 : # of power
** byte 7/8 : Fan#0 (RPM)
** byte 9/10 : Fan#1
** byte 11/12 : Voltage#0 original value in *1000
** byte 13/14 : Voltage#0 value
** byte 15/16 : Voltage#1 org
** byte 17/18 : Voltage#1
** byte 19/20 : Voltage#2 org
** byte 21/22 : Voltage#2
** byte 23 : Temp#0
** byte 24 : Temp#1
** byte 25 : Power indicator (bit0 : power#0,
** bit1 : power#1)
** byte 26 : UPS indicator
** GUI_QUICK_CREATE : Quick create raid/volume set
** byte 0,1 : length
** byte 2 : command code 0x20
** byte 3/4/5/6 : raw capacity
** byte 7 : raid level
** byte 8 : stripe size
** byte 9 : spare
** byte 10/11/12/13: device mask (the devices to create raid/volume)
** This function is removed, application like
** to implement quick create function
** need to use GUI_CREATE_RAIDSET and GUI_CREATE_VOLUMESET function.
** GUI_GET_INFO_R : Get Raid Set Information
** byte 0,1 : length
** byte 2 : command code 0x20
** byte 3 : raidset#
** typedef struct sGUI_RAIDSET
** {
** BYTE grsRaidSetName[16];
** DWORD grsCapacity;
** DWORD grsCapacityX;
** DWORD grsFailMask;
** BYTE grsDevArray[32];
** BYTE grsMemberDevices;
** BYTE grsNewMemberDevices;
** BYTE grsRaidState;
** BYTE grsVolumes;
** BYTE grsVolumeList[16];
** BYTE grsRes1;
** BYTE grsRes2;
** BYTE grsRes3;
** BYTE grsFreeSegments;
** DWORD grsRawStripes[8];
** DWORD grsRes4;
** DWORD grsRes5; // Total to 128 bytes
** DWORD grsRes6; // Total to 128 bytes
** } sGUI_RAIDSET, *pGUI_RAIDSET;
** GUI_GET_INFO_V : Get Volume Set Information
** byte 0,1 : length
** byte 2 : command code 0x21
** byte 3 : volumeset#
** typedef struct sGUI_VOLUMESET
** {
** BYTE gvsVolumeName[16]; // 16
** DWORD gvsCapacity;
** DWORD gvsCapacityX;
** DWORD gvsFailMask;
** DWORD gvsStripeSize;
** DWORD gvsNewFailMask;
** DWORD gvsNewStripeSize;
** DWORD gvsVolumeStatus;
** DWORD gvsProgress; // 32
** sSCSI_ATTR gvsScsi;
** BYTE gvsMemberDisks;
** BYTE gvsRaidLevel; // 8
** BYTE gvsNewMemberDisks;
** BYTE gvsNewRaidLevel;
** BYTE gvsRaidSetNumber;
** BYTE gvsRes0; // 4
** BYTE gvsRes1[4]; // 64 bytes
** } sGUI_VOLUMESET, *pGUI_VOLUMESET;
** GUI_GET_INFO_P : Get Physical Drive Information
** byte 0,1 : length
** byte 2 : command code 0x22
** byte 3 : drive # (from 0 to max-channels - 1)
** typedef struct sGUI_PHY_DRV
** {
** BYTE gpdModelName[40];
** BYTE gpdSerialNumber[20];
** BYTE gpdFirmRev[8];
** DWORD gpdCapacity;
** DWORD gpdCapacityX; // Reserved for expansion
** BYTE gpdDeviceState;
** BYTE gpdPioMode;
** BYTE gpdCurrentUdmaMode;
** BYTE gpdUdmaMode;
** BYTE gpdDriveSelect;
** BYTE gpdRaidNumber; // 0xff if not belongs to a raid set
** sSCSI_ATTR gpdScsi;
** BYTE gpdReserved[40]; // Total to 128 bytes
** } sGUI_PHY_DRV, *pGUI_PHY_DRV;
** GUI_GET_INFO_S : Get System Information
** byte 0,1 : length
** byte 2 : command code 0x23
** typedef struct sCOM_ATTR
** {
** BYTE comBaudRate;
** BYTE comDataBits;
** BYTE comStopBits;
** BYTE comParity;
** BYTE comFlowControl;
** } sCOM_ATTR, *pCOM_ATTR;
** typedef struct sSYSTEM_INFO
** {
** BYTE gsiVendorName[40];
** BYTE gsiSerialNumber[16];
** BYTE gsiFirmVersion[16];
** BYTE gsiBootVersion[16];
** BYTE gsiMbVersion[16];
** BYTE gsiModelName[8];
** BYTE gsiLocalIp[4];
** BYTE gsiCurrentIp[4];
** DWORD gsiTimeTick;
** DWORD gsiCpuSpeed;
** DWORD gsiICache;
** DWORD gsiDCache;
** DWORD gsiScache;
** DWORD gsiMemorySize;
** DWORD gsiMemorySpeed;
** DWORD gsiEvents;
** BYTE gsiMacAddress[6];
** BYTE gsiDhcp;
** BYTE gsiBeeper;
** BYTE gsiChannelUsage;
** BYTE gsiMaxAtaMode;
** BYTE gsiSdramEcc; // 1:if ECC enabled
** BYTE gsiRebuildPriority;
** sCOM_ATTR gsiComA; // 5 bytes
** sCOM_ATTR gsiComB; // 5 bytes
** BYTE gsiIdeChannels;
** BYTE gsiScsiHostChannels;
** BYTE gsiIdeHostChannels;
** BYTE gsiMaxVolumeSet;
** BYTE gsiMaxRaidSet;
** BYTE gsiEtherPort; // 1:if ether net port supported
** BYTE gsiRaid6Engine; // 1:Raid6 engine supported
** BYTE gsiRes[75];
** } sSYSTEM_INFO, *pSYSTEM_INFO;
** GUI_CLEAR_EVENT : Clear System Event
** byte 0,1 : length
** byte 2 : command code 0x24
** GUI_MUTE_BEEPER : Mute current beeper
** byte 0,1 : length
** byte 2 : command code 0x30
** GUI_BEEPER_SETTING : Disable beeper
** byte 0,1 : length
** byte 2 : command code 0x31
** byte 3 : 0->disable, 1->enable
** GUI_SET_PASSWORD : Change password
** byte 0,1 : length
** byte 2 : command code 0x32
** byte 3 : pass word length ( must <= 15 )
** byte 4 : password (must be alpha-numerical)
** GUI_HOST_INTERFACE_MODE : Set host interface mode
** byte 0,1 : length
** byte 2 : command code 0x33
** byte 3 : 0->Independent, 1->cluster
** GUI_REBUILD_PRIORITY : Set rebuild priority
** byte 0,1 : length
** byte 2 : command code 0x34
** byte 3 : 0/1/2/3 (low->high)
** GUI_MAX_ATA_MODE : Set maximum ATA mode to be used
** byte 0,1 : length
** byte 2 : command code 0x35
** byte 3 : 0/1/2/3 (133/100/66/33)
** GUI_RESET_CONTROLLER : Reset Controller
** byte 0,1 : length
** byte 2 : command code 0x36
** *Response with VT100 screen (discard it)
** GUI_COM_PORT_SETTING : COM port setting
** byte 0,1 : length
** byte 2 : command code 0x37
** byte 3 : 0->COMA (term port),
** 1->COMB (debug port)
** byte 4 : 0/1/2/3/4/5/6/7
** (1200/2400/4800/9600/19200/38400/57600/115200)
** byte 5 : data bit
** (0:7 bit, 1:8 bit : must be 8 bit)
** byte 6 : stop bit (0:1, 1:2 stop bits)
** byte 7 : parity (0:none, 1:off, 2:even)
** byte 8 : flow control
** (0:none, 1:xon/xoff, 2:hardware => must use none)
** GUI_NO_OPERATION : No operation
** byte 0,1 : length
** byte 2 : command code 0x38
** GUI_DHCP_IP : Set DHCP option and local IP address
** byte 0,1 : length
** byte 2 : command code 0x39
** byte 3 : 0:dhcp disabled, 1:dhcp enabled
** byte 4/5/6/7 : IP address
** GUI_CREATE_PASS_THROUGH : Create pass through disk
** byte 0,1 : length
** byte 2 : command code 0x40
** byte 3 : device #
** byte 4 : scsi channel (0/1)
** byte 5 : scsi id (0-->15)
** byte 6 : scsi lun (0-->7)
** byte 7 : tagged queue (1 : enabled)
** byte 8 : cache mode (1 : enabled)
** byte 9 : max speed (0/1/2/3/4,
** async/20/40/80/160 for scsi)
** (0/1/2/3/4, 33/66/100/133/150 for ide )
** GUI_MODIFY_PASS_THROUGH : Modify pass through disk
** byte 0,1 : length
** byte 2 : command code 0x41
** byte 3 : device #
** byte 4 : scsi channel (0/1)
** byte 5 : scsi id (0-->15)
** byte 6 : scsi lun (0-->7)
** byte 7 : tagged queue (1 : enabled)
** byte 8 : cache mode (1 : enabled)
** byte 9 : max speed (0/1/2/3/4,
** async/20/40/80/160 for scsi)
** (0/1/2/3/4, 33/66/100/133/150 for ide )
** GUI_DELETE_PASS_THROUGH : Delete pass through disk
** byte 0,1 : length
** byte 2 : command code 0x42
** byte 3 : device# to be deleted
** GUI_IDENTIFY_DEVICE : Identify Device
** byte 0,1 : length
** byte 2 : command code 0x43
** byte 3 : Flash Method
** (0:flash selected, 1:flash not selected)
** byte 4/5/6/7 : IDE device mask to be flashed
** note .... no response data available
** GUI_CREATE_RAIDSET : Create Raid Set
** byte 0,1 : length
** byte 2 : command code 0x50
** byte 3/4/5/6 : device mask
** byte 7-22 : raidset name (if byte 7 == 0:use default)
** GUI_DELETE_RAIDSET : Delete Raid Set
** byte 0,1 : length
** byte 2 : command code 0x51
** byte 3 : raidset#
** GUI_EXPAND_RAIDSET : Expand Raid Set
** byte 0,1 : length
** byte 2 : command code 0x52
** byte 3 : raidset#
** byte 4/5/6/7 : device mask for expansion
** byte 8/9/10 : (8:0 no change, 1 change, 0xff:terminate,
** 9:new raid level,
** 10:new stripe size
** 0/1/2/3/4/5->4/8/16/32/64/128K )
** byte 11/12/13 : repeat for each volume in the raidset
** GUI_ACTIVATE_RAIDSET : Activate incomplete raid set
** byte 0,1 : length
** byte 2 : command code 0x53
** byte 3 : raidset#
** GUI_CREATE_HOT_SPARE : Create hot spare disk
** byte 0,1 : length
** byte 2 : command code 0x54
** byte 3/4/5/6 : device mask for hot spare creation
** GUI_DELETE_HOT_SPARE : Delete hot spare disk
** byte 0,1 : length
** byte 2 : command code 0x55
** byte 3/4/5/6 : device mask for hot spare deletion
** GUI_CREATE_VOLUME : Create volume set
** byte 0,1 : length
** byte 2 : command code 0x60
** byte 3 : raidset#
** byte 4-19 : volume set name
** (if byte4 == 0, use default)
** byte 20-27 : volume capacity (blocks)
** byte 28 : raid level
** byte 29 : stripe size
** (0/1/2/3/4/5->4/8/16/32/64/128K)
** byte 30 : channel
** byte 31 : ID
** byte 32 : LUN
** byte 33 : 1 enable tag
** byte 34 : 1 enable cache
** byte 35 : speed
** (0/1/2/3/4->async/20/40/80/160 for scsi)
** (0/1/2/3/4->33/66/100/133/150 for IDE )
** byte 36 : 1 to select quick init
**
** GUI_MODIFY_VOLUME : Modify volume Set
** byte 0,1 : length
** byte 2 : command code 0x61
** byte 3 : volumeset#
** byte 4-19 : new volume set name
** (if byte4 == 0, not change)
** byte 20-27 : new volume capacity (reserved)
** byte 28 : new raid level
** byte 29 : new stripe size
** (0/1/2/3/4/5->4/8/16/32/64/128K)
** byte 30 : new channel
** byte 31 : new ID
** byte 32 : new LUN
** byte 33 : 1 enable tag
** byte 34 : 1 enable cache
** byte 35 : speed
** (0/1/2/3/4->async/20/40/80/160 for scsi)
** (0/1/2/3/4->33/66/100/133/150 for IDE )
** GUI_DELETE_VOLUME : Delete volume set
** byte 0,1 : length
** byte 2 : command code 0x62
** byte 3 : volumeset#
** GUI_START_CHECK_VOLUME : Start volume consistency check
** byte 0,1 : length
** byte 2 : command code 0x63
** byte 3 : volumeset#
** GUI_STOP_CHECK_VOLUME : Stop volume consistency check
** byte 0,1 : length
** byte 2 : command code 0x64
** ---------------------------------------------------------------------
** 4. Returned data
** ---------------------------------------------------------------------
** (A) Header : 3 bytes sequence (0x5E, 0x01, 0x61)
** (B) Length : 2 bytes
** (low byte 1st, excludes length and checksum byte)
** (C) status or data :
** <1> If length == 1 ==> 1 byte status code
** #define GUI_OK 0x41
** #define GUI_RAIDSET_NOT_NORMAL 0x42
** #define GUI_VOLUMESET_NOT_NORMAL 0x43
** #define GUI_NO_RAIDSET 0x44
** #define GUI_NO_VOLUMESET 0x45
** #define GUI_NO_PHYSICAL_DRIVE 0x46
** #define GUI_PARAMETER_ERROR 0x47
** #define GUI_UNSUPPORTED_COMMAND 0x48
** #define GUI_DISK_CONFIG_CHANGED 0x49
** #define GUI_INVALID_PASSWORD 0x4a
** #define GUI_NO_DISK_SPACE 0x4b
** #define GUI_CHECKSUM_ERROR 0x4c
** #define GUI_PASSWORD_REQUIRED 0x4d
** <2> If length > 1 ==>
** data block returned from controller
** and the contents depends on the command code
** (E) Checksum : checksum of length and status or data byte
**************************************************************************

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SAS Layer
---------
The SAS Layer is a management infrastructure which manages
SAS LLDDs. It sits between SCSI Core and SAS LLDDs. The
layout is as follows: while SCSI Core is concerned with
SAM/SPC issues, and a SAS LLDD+sequencer is concerned with
phy/OOB/link management, the SAS layer is concerned with:
* SAS Phy/Port/HA event management (LLDD generates,
SAS Layer processes),
* SAS Port management (creation/destruction),
* SAS Domain discovery and revalidation,
* SAS Domain device management,
* SCSI Host registration/unregistration,
* Device registration with SCSI Core (SAS) or libata
(SATA), and
* Expander management and exporting expander control
to user space.
A SAS LLDD is a PCI device driver. It is concerned with
phy/OOB management, and vendor specific tasks and generates
events to the SAS layer.
The SAS Layer does most SAS tasks as outlined in the SAS 1.1
spec.
The sas_ha_struct describes the SAS LLDD to the SAS layer.
Most of it is used by the SAS Layer but a few fields need to
be initialized by the LLDDs.
After initializing your hardware, from the probe() function
you call sas_register_ha(). It will register your LLDD with
the SCSI subsystem, creating a SCSI host and it will
register your SAS driver with the sysfs SAS tree it creates.
It will then return. Then you enable your phys to actually
start OOB (at which point your driver will start calling the
notify_* event callbacks).
Structure descriptions:
struct sas_phy --------------------
Normally this is statically embedded to your driver's
phy structure:
struct my_phy {
blah;
struct sas_phy sas_phy;
bleh;
};
And then all the phys are an array of my_phy in your HA
struct (shown below).
Then as you go along and initialize your phys you also
initialize the sas_phy struct, along with your own
phy structure.
In general, the phys are managed by the LLDD and the ports
are managed by the SAS layer. So the phys are initialized
and updated by the LLDD and the ports are initialized and
updated by the SAS layer.
There is a scheme where the LLDD can RW certain fields,
and the SAS layer can only read such ones, and vice versa.
The idea is to avoid unnecessary locking.
enabled -- must be set (0/1)
id -- must be set [0,MAX_PHYS)
class, proto, type, role, oob_mode, linkrate -- must be set
oob_mode -- you set this when OOB has finished and then notify
the SAS Layer.
sas_addr -- this normally points to an array holding the sas
address of the phy, possibly somewhere in your my_phy
struct.
attached_sas_addr -- set this when you (LLDD) receive an
IDENTIFY frame or a FIS frame, _before_ notifying the SAS
layer. The idea is that sometimes the LLDD may want to fake
or provide a different SAS address on that phy/port and this
allows it to do this. At best you should copy the sas
address from the IDENTIFY frame or maybe generate a SAS
address for SATA directly attached devices. The Discover
process may later change this.
frame_rcvd -- this is where you copy the IDENTIFY/FIS frame
when you get it; you lock, copy, set frame_rcvd_size and
unlock the lock, and then call the event. It is a pointer
since there's no way to know your hw frame size _exactly_,
so you define the actual array in your phy struct and let
this pointer point to it. You copy the frame from your
DMAable memory to that area holding the lock.
sas_prim -- this is where primitives go when they're
received. See sas.h. Grab the lock, set the primitive,
release the lock, notify.
port -- this points to the sas_port if the phy belongs
to a port -- the LLDD only reads this. It points to the
sas_port this phy is part of. Set by the SAS Layer.
ha -- may be set; the SAS layer sets it anyway.
lldd_phy -- you should set this to point to your phy so you
can find your way around faster when the SAS layer calls one
of your callbacks and passes you a phy. If the sas_phy is
embedded you can also use container_of -- whatever you
prefer.
struct sas_port --------------------
The LLDD doesn't set any fields of this struct -- it only
reads them. They should be self explanatory.
phy_mask is 32 bit, this should be enough for now, as I
haven't heard of a HA having more than 8 phys.
lldd_port -- I haven't found use for that -- maybe other
LLDD who wish to have internal port representation can make
use of this.
struct sas_ha_struct --------------------
It normally is statically declared in your own LLDD
structure describing your adapter:
struct my_sas_ha {
blah;
struct sas_ha_struct sas_ha;
struct my_phy phys[MAX_PHYS];
struct sas_port sas_ports[MAX_PHYS]; /* (1) */
bleh;
};
(1) If your LLDD doesn't have its own port representation.
What needs to be initialized (sample function given below).
pcidev
sas_addr -- since the SAS layer doesn't want to mess with
memory allocation, etc, this points to statically
allocated array somewhere (say in your host adapter
structure) and holds the SAS address of the host
adapter as given by you or the manufacturer, etc.
sas_port
sas_phy -- an array of pointers to structures. (see
note above on sas_addr).
These must be set. See more notes below.
num_phys -- the number of phys present in the sas_phy array,
and the number of ports present in the sas_port
array. There can be a maximum num_phys ports (one per
port) so we drop the num_ports, and only use
num_phys.
The event interface:
/* LLDD calls these to notify the class of an event. */
void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
void (*notify_port_event)(struct sas_phy *, enum port_event);
void (*notify_phy_event)(struct sas_phy *, enum phy_event);
When sas_register_ha() returns, those are set and can be
called by the LLDD to notify the SAS layer of such events
the SAS layer.
The port notification:
/* The class calls these to notify the LLDD of an event. */
void (*lldd_port_formed)(struct sas_phy *);
void (*lldd_port_deformed)(struct sas_phy *);
If the LLDD wants notification when a port has been formed
or deformed it sets those to a function satisfying the type.
A SAS LLDD should also implement at least one of the Task
Management Functions (TMFs) described in SAM:
/* Task Management Functions. Must be called from process context. */
int (*lldd_abort_task)(struct sas_task *);
int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
int (*lldd_I_T_nexus_reset)(struct domain_device *);
int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
int (*lldd_query_task)(struct sas_task *);
For more information please read SAM from T10.org.
Port and Adapter management:
/* Port and Adapter management */
int (*lldd_clear_nexus_port)(struct sas_port *);
int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
A SAS LLDD should implement at least one of those.
Phy management:
/* Phy management */
int (*lldd_control_phy)(struct sas_phy *, enum phy_func);
lldd_ha -- set this to point to your HA struct. You can also
use container_of if you embedded it as shown above.
A sample initialization and registration function
can look like this (called last thing from probe())
*but* before you enable the phys to do OOB:
static int register_sas_ha(struct my_sas_ha *my_ha)
{
int i;
static struct sas_phy *sas_phys[MAX_PHYS];
static struct sas_port *sas_ports[MAX_PHYS];
my_ha->sas_ha.sas_addr = &my_ha->sas_addr[0];
for (i = 0; i < MAX_PHYS; i++) {
sas_phys[i] = &my_ha->phys[i].sas_phy;
sas_ports[i] = &my_ha->sas_ports[i];
}
my_ha->sas_ha.sas_phy = sas_phys;
my_ha->sas_ha.sas_port = sas_ports;
my_ha->sas_ha.num_phys = MAX_PHYS;
my_ha->sas_ha.lldd_port_formed = my_port_formed;
my_ha->sas_ha.lldd_dev_found = my_dev_found;
my_ha->sas_ha.lldd_dev_gone = my_dev_gone;
my_ha->sas_ha.lldd_max_execute_num = lldd_max_execute_num; (1)
my_ha->sas_ha.lldd_queue_size = ha_can_queue;
my_ha->sas_ha.lldd_execute_task = my_execute_task;
my_ha->sas_ha.lldd_abort_task = my_abort_task;
my_ha->sas_ha.lldd_abort_task_set = my_abort_task_set;
my_ha->sas_ha.lldd_clear_aca = my_clear_aca;
my_ha->sas_ha.lldd_clear_task_set = my_clear_task_set;
my_ha->sas_ha.lldd_I_T_nexus_reset= NULL; (2)
my_ha->sas_ha.lldd_lu_reset = my_lu_reset;
my_ha->sas_ha.lldd_query_task = my_query_task;
my_ha->sas_ha.lldd_clear_nexus_port = my_clear_nexus_port;
my_ha->sas_ha.lldd_clear_nexus_ha = my_clear_nexus_ha;
my_ha->sas_ha.lldd_control_phy = my_control_phy;
return sas_register_ha(&my_ha->sas_ha);
}
(1) This is normally a LLDD parameter, something of the
lines of a task collector. What it tells the SAS Layer is
whether the SAS layer should run in Direct Mode (default:
value 0 or 1) or Task Collector Mode (value greater than 1).
In Direct Mode, the SAS Layer calls Execute Task as soon as
it has a command to send to the SDS, _and_ this is a single
command, i.e. not linked.
Some hardware (e.g. aic94xx) has the capability to DMA more
than one task at a time (interrupt) from host memory. Task
Collector Mode is an optional feature for HAs which support
this in their hardware. (Again, it is completely optional
even if your hardware supports it.)
In Task Collector Mode, the SAS Layer would do _natural_
coalescing of tasks and at the appropriate moment it would
call your driver to DMA more than one task in a single HA
interrupt. DMBS may want to use this by insmod/modprobe
setting the lldd_max_execute_num to something greater than
1.
(2) SAS 1.1 does not define I_T Nexus Reset TMF.
Events
------
Events are _the only way_ a SAS LLDD notifies the SAS layer
of anything. There is no other method or way a LLDD to tell
the SAS layer of anything happening internally or in the SAS
domain.
Phy events:
PHYE_LOSS_OF_SIGNAL, (C)
PHYE_OOB_DONE,
PHYE_OOB_ERROR, (C)
PHYE_SPINUP_HOLD.
Port events, passed on a _phy_:
PORTE_BYTES_DMAED, (M)
PORTE_BROADCAST_RCVD, (E)
PORTE_LINK_RESET_ERR, (C)
PORTE_TIMER_EVENT, (C)
PORTE_HARD_RESET.
Host Adapter event:
HAE_RESET
A SAS LLDD should be able to generate
- at least one event from group C (choice),
- events marked M (mandatory) are mandatory (only one),
- events marked E (expander) if it wants the SAS layer
to handle domain revalidation (only one such).
- Unmarked events are optional.
Meaning:
HAE_RESET -- when your HA got internal error and was reset.
PORTE_BYTES_DMAED -- on receiving an IDENTIFY/FIS frame
PORTE_BROADCAST_RCVD -- on receiving a primitive
PORTE_LINK_RESET_ERR -- timer expired, loss of signal, loss
of DWS, etc. (*)
PORTE_TIMER_EVENT -- DWS reset timeout timer expired (*)
PORTE_HARD_RESET -- Hard Reset primitive received.
PHYE_LOSS_OF_SIGNAL -- the device is gone (*)
PHYE_OOB_DONE -- OOB went fine and oob_mode is valid
PHYE_OOB_ERROR -- Error while doing OOB, the device probably
got disconnected. (*)
PHYE_SPINUP_HOLD -- SATA is present, COMWAKE not sent.
(*) should set/clear the appropriate fields in the phy,
or alternatively call the inlined sas_phy_disconnected()
which is just a helper, from their tasklet.
The Execute Command SCSI RPC:
int (*lldd_execute_task)(struct sas_task *, int num,
unsigned long gfp_flags);
Used to queue a task to the SAS LLDD. @task is the tasks to
be executed. @num should be the number of tasks being
queued at this function call (they are linked listed via
task::list), @gfp_mask should be the gfp_mask defining the
context of the caller.
This function should implement the Execute Command SCSI RPC,
or if you're sending a SCSI Task as linked commands, you
should also use this function.
That is, when lldd_execute_task() is called, the command(s)
go out on the transport *immediately*. There is *no*
queuing of any sort and at any level in a SAS LLDD.
The use of task::list is two-fold, one for linked commands,
the other discussed below.
It is possible to queue up more than one task at a time, by
initializing the list element of struct sas_task, and
passing the number of tasks enlisted in this manner in num.
Returns: -SAS_QUEUE_FULL, -ENOMEM, nothing was queued;
0, the task(s) were queued.
If you want to pass num > 1, then either
A) you're the only caller of this function and keep track
of what you've queued to the LLDD, or
B) you know what you're doing and have a strategy of
retrying.
As opposed to queuing one task at a time (function call),
batch queuing of tasks, by having num > 1, greatly
simplifies LLDD code, sequencer code, and _hardware design_,
and has some performance advantages in certain situations
(DBMS).
The LLDD advertises if it can take more than one command at
a time at lldd_execute_task(), by setting the
lldd_max_execute_num parameter (controlled by "collector"
module parameter in aic94xx SAS LLDD).
You should leave this to the default 1, unless you know what
you're doing.
This is a function of the LLDD, to which the SAS layer can
cater to.
int lldd_queue_size
The host adapter's queue size. This is the maximum
number of commands the lldd can have pending to domain
devices on behalf of all upper layers submitting through
lldd_execute_task().
You really want to set this to something (much) larger than
1.
This _really_ has absolutely nothing to do with queuing.
There is no queuing in SAS LLDDs.
struct sas_task {
dev -- the device this task is destined to
list -- must be initialized (INIT_LIST_HEAD)
task_proto -- _one_ of enum sas_proto
scatter -- pointer to scatter gather list array
num_scatter -- number of elements in scatter
total_xfer_len -- total number of bytes expected to be transfered
data_dir -- PCI_DMA_...
task_done -- callback when the task has finished execution
};
When an external entity, entity other than the LLDD or the
SAS Layer, wants to work with a struct domain_device, it
_must_ call kobject_get() when getting a handle on the
device and kobject_put() when it is done with the device.
This does two things:
A) implements proper kfree() for the device;
B) increments/decrements the kref for all players:
domain_device
all domain_device's ... (if past an expander)
port
host adapter
pci device
and up the ladder, etc.
DISCOVERY
---------
The sysfs tree has the following purposes:
a) It shows you the physical layout of the SAS domain at
the current time, i.e. how the domain looks in the
physical world right now.
b) Shows some device parameters _at_discovery_time_.
This is a link to the tree(1) program, very useful in
viewing the SAS domain:
ftp://mama.indstate.edu/linux/tree/
I expect user space applications to actually create a
graphical interface of this.
That is, the sysfs domain tree doesn't show or keep state if
you e.g., change the meaning of the READY LED MEANING
setting, but it does show you the current connection status
of the domain device.
Keeping internal device state changes is responsibility of
upper layers (Command set drivers) and user space.
When a device or devices are unplugged from the domain, this
is reflected in the sysfs tree immediately, and the device(s)
removed from the system.
The structure domain_device describes any device in the SAS
domain. It is completely managed by the SAS layer. A task
points to a domain device, this is how the SAS LLDD knows
where to send the task(s) to. A SAS LLDD only reads the
contents of the domain_device structure, but it never creates
or destroys one.
Expander management from User Space
-----------------------------------
In each expander directory in sysfs, there is a file called
"smp_portal". It is a binary sysfs attribute file, which
implements an SMP portal (Note: this is *NOT* an SMP port),
to which user space applications can send SMP requests and
receive SMP responses.
Functionality is deceptively simple:
1. Build the SMP frame you want to send. The format and layout
is described in the SAS spec. Leave the CRC field equal 0.
open(2)
2. Open the expander's SMP portal sysfs file in RW mode.
write(2)
3. Write the frame you built in 1.
read(2)
4. Read the amount of data you expect to receive for the frame you built.
If you receive different amount of data you expected to receive,
then there was some kind of error.
close(2)
All this process is shown in detail in the function do_smp_func()
and its callers, in the file "expander_conf.c".
The kernel functionality is implemented in the file
"sas_expander.c".
The program "expander_conf.c" implements this. It takes one
argument, the sysfs file name of the SMP portal to the
expander, and gives expander information, including routing
tables.
The SMP portal gives you complete control of the expander,
so please be careful.