diff options
Diffstat (limited to 'Documentation/scsi')
| -rw-r--r-- | Documentation/scsi/ChangeLog.arcmsr | 56 | ||||
| -rw-r--r-- | Documentation/scsi/ChangeLog.megaraid | 123 | ||||
| -rw-r--r-- | Documentation/scsi/ChangeLog.megaraid_sas | 16 | ||||
| -rw-r--r-- | Documentation/scsi/aacraid.txt | 53 | ||||
| -rw-r--r-- | Documentation/scsi/arcmsr_spec.txt | 574 | ||||
| -rw-r--r-- | Documentation/scsi/libsas.txt | 484 | ||||
| -rw-r--r-- | Documentation/scsi/ppa.txt | 2 | ||||
| -rw-r--r-- | Documentation/scsi/tmscsim.txt | 2 |
8 files changed, 1284 insertions, 26 deletions
diff --git a/Documentation/scsi/ChangeLog.arcmsr b/Documentation/scsi/ChangeLog.arcmsr new file mode 100644 index 00000000000..162c47fdf45 --- /dev/null +++ b/Documentation/scsi/ChangeLog.arcmsr @@ -0,0 +1,56 @@ +************************************************************************** +** 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 +**************************************************************************
\ No newline at end of file diff --git a/Documentation/scsi/ChangeLog.megaraid b/Documentation/scsi/ChangeLog.megaraid index c173806c91f..a056bbe67c7 100644 --- a/Documentation/scsi/ChangeLog.megaraid +++ b/Documentation/scsi/ChangeLog.megaraid @@ -1,3 +1,126 @@ +Release Date : Fri May 19 09:31:45 EST 2006 - Seokmann Ju <sju@lsil.com> +Current Version : 2.20.4.9 (scsi module), 2.20.2.6 (cmm module) +Older Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module) + +1. Fixed a bug in megaraid_init_mbox(). + Customer reported "garbage in file on x86_64 platform". + Root Cause: the driver registered controllers as 64-bit DMA capable + for those which are not support it. + Fix: Made change in the function inserting identification machanism + identifying 64-bit DMA capable controllers. + + > -----Original Message----- + > From: Vasily Averin [mailto:vvs@sw.ru] + > Sent: Thursday, May 04, 2006 2:49 PM + > To: linux-scsi@vger.kernel.org; Kolli, Neela; Mukker, Atul; + > Ju, Seokmann; Bagalkote, Sreenivas; + > James.Bottomley@SteelEye.com; devel@openvz.org + > Subject: megaraid_mbox: garbage in file + > + > Hello all, + > + > I've investigated customers claim on the unstable work of + > their node and found a + > strange effect: reading from some files leads to the + > "attempt to access beyond end of device" messages. + > + > I've checked filesystem, memory on the node, motherboard BIOS + > version, but it + > does not help and issue still has been reproduced by simple + > file reading. + > + > Reproducer is simple: + > + > echo 0xffffffff >/proc/sys/dev/scsi/logging_level ; + > cat /vz/private/101/root/etc/ld.so.cache >/tmp/ttt ; + > echo 0 >/proc/sys/dev/scsi/logging + > + > It leads to the following messages in dmesg + > + > sd_init_command: disk=sda, block=871769260, count=26 + > sda : block=871769260 + > sda : reading 26/26 512 byte blocks. + > scsi_add_timer: scmd: f79ed980, time: 7500, (c02b1420) + > sd 0:1:0:0: send 0xf79ed980 sd 0:1:0:0: + > command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00 + > buffer = 0xf7cfb540, bufflen = 13312, done = 0xc0366b40, + > queuecommand 0xc0344010 + > leaving scsi_dispatch_cmnd() + > scsi_delete_timer: scmd: f79ed980, rtn: 1 + > sd 0:1:0:0: done 0xf79ed980 SUCCESS 0 sd 0:1:0:0: + > command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00 + > scsi host busy 1 failed 0 + > sd 0:1:0:0: Notifying upper driver of completion (result 0) + > sd_rw_intr: sda: res=0x0 + > 26 sectors total, 13312 bytes done. + > use_sg is 4 + > attempt to access beyond end of device + > sda6: rw=0, want=1044134458, limit=951401367 + > Buffer I/O error on device sda6, logical block 522067228 + > attempt to access beyond end of device + +2. When INQUIRY with EVPD bit set issued to the MegaRAID controller, + system memory gets corrupted. + Root Cause: MegaRAID F/W handle the INQUIRY with EVPD bit set + incorrectly. + Fix: MegaRAID F/W has fixed the problem and being process of release, + soon. Meanwhile, driver will filter out the request. + +3. One of member in the data structure of the driver leads unaligne + issue on 64-bit platform. + Customer reporeted "kernel unaligned access addrss" issue when + application communicates with MegaRAID HBA driver. + Root Cause: in uioc_t structure, one of member had misaligned and it + led system to display the error message. + Fix: A patch submitted to community from following folk. + + > -----Original Message----- + > From: linux-scsi-owner@vger.kernel.org + > [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Sakurai Hiroomi + > Sent: Wednesday, July 12, 2006 4:20 AM + > To: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org + > Subject: Re: Help: strange messages from kernel on IA64 platform + > + > Hi, + > + > I saw same message. + > + > When GAM(Global Array Manager) is started, The following + > message output. + > kernel: kernel unaligned access to 0xe0000001fe1080d4, + > ip=0xa000000200053371 + > + > The uioc structure used by ioctl is defined by packed, + > the allignment of each member are disturbed. + > In a 64 bit structure, the allignment of member doesn't fit 64 bit + > boundary. this causes this messages. + > In a 32 bit structure, we don't see the message because the allinment + > of member fit 32 bit boundary even if packed is specified. + > + > patch + > I Add 32 bit dummy member to fit 64 bit boundary. I tested. + > We confirmed this patch fix the problem by IA64 server. + > + > ************************************************************** + > **************** + > --- linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h.orig + > 2006-04-03 17:13:03.000000000 +0900 + > +++ linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h + > 2006-04-03 17:14:09.000000000 +0900 + > @@ -132,6 +132,10 @@ + > /* Driver Data: */ + > void __user * user_data; + > uint32_t user_data_len; + > + + > + /* 64bit alignment */ + > + uint32_t pad_0xBC; + > + + > mraid_passthru_t __user *user_pthru; + > + > mraid_passthru_t *pthru32; + > ************************************************************** + > **************** + Release Date : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com> Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module) Older Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module) diff --git a/Documentation/scsi/ChangeLog.megaraid_sas b/Documentation/scsi/ChangeLog.megaraid_sas index 0a85a7e8120..d9e5960dafd 100644 --- a/Documentation/scsi/ChangeLog.megaraid_sas +++ b/Documentation/scsi/ChangeLog.megaraid_sas @@ -1,4 +1,20 @@ +1 Release Date : Sun May 14 22:49:52 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com> +2 Current Version : 00.00.03.01 +3 Older Version : 00.00.02.04 + +i. Added support for ZCR controller. + + New device id 0x413 added. + +ii. Bug fix : Disable controller interrupt before firing INIT cmd to FW. + + Interrupt is enabled after required initialization is over. + This is done to ensure that driver is ready to handle interrupts when + it is generated by the controller. + + -Sumant Patro <Sumant.Patro@lsil.com> + 1 Release Date : Wed Feb 03 14:31:44 PST 2006 - Sumant Patro <Sumant.Patro@lsil.com> 2 Current Version : 00.00.02.04 3 Older Version : 00.00.02.04 diff --git a/Documentation/scsi/aacraid.txt b/Documentation/scsi/aacraid.txt index be55670851a..ee03678c802 100644 --- a/Documentation/scsi/aacraid.txt +++ b/Documentation/scsi/aacraid.txt @@ -11,38 +11,43 @@ the original). Supported Cards/Chipsets ------------------------- PCI ID (pci.ids) OEM Product - 9005:0285:9005:028a Adaptec 2020ZCR (Skyhawk) - 9005:0285:9005:028e Adaptec 2020SA (Skyhawk) - 9005:0285:9005:028b Adaptec 2025ZCR (Terminator) - 9005:0285:9005:028f Adaptec 2025SA (Terminator) - 9005:0285:9005:0286 Adaptec 2120S (Crusader) - 9005:0286:9005:028d Adaptec 2130S (Lancer) + 9005:0283:9005:0283 Adaptec Catapult (3210S with arc firmware) + 9005:0284:9005:0284 Adaptec Tomcat (3410S with arc firmware) 9005:0285:9005:0285 Adaptec 2200S (Vulcan) + 9005:0285:9005:0286 Adaptec 2120S (Crusader) 9005:0285:9005:0287 Adaptec 2200S (Vulcan-2m) + 9005:0285:9005:0288 Adaptec 3230S (Harrier) + 9005:0285:9005:0289 Adaptec 3240S (Tornado) + 9005:0285:9005:028a Adaptec 2020ZCR (Skyhawk) + 9005:0285:9005:028b Adaptec 2025ZCR (Terminator) 9005:0286:9005:028c Adaptec 2230S (Lancer) 9005:0286:9005:028c Adaptec 2230SLP (Lancer) - 9005:0285:9005:0296 Adaptec 2240S (SabreExpress) + 9005:0286:9005:028d Adaptec 2130S (Lancer) + 9005:0285:9005:028e Adaptec 2020SA (Skyhawk) + 9005:0285:9005:028f Adaptec 2025SA (Terminator) 9005:0285:9005:0290 Adaptec 2410SA (Jaguar) - 9005:0285:9005:0293 Adaptec 21610SA (Corsair-16) 9005:0285:103c:3227 Adaptec 2610SA (Bearcat HP release) + 9005:0285:9005:0293 Adaptec 21610SA (Corsair-16) + 9005:0285:9005:0296 Adaptec 2240S (SabreExpress) 9005:0285:9005:0292 Adaptec 2810SA (Corsair-8) 9005:0285:9005:0294 Adaptec Prowler - 9005:0286:9005:029d Adaptec 2420SA (Intruder HP release) - 9005:0286:9005:029c Adaptec 2620SA (Intruder) - 9005:0286:9005:029b Adaptec 2820SA (Intruder) - 9005:0286:9005:02a7 Adaptec 2830SA (Skyray) - 9005:0286:9005:02a8 Adaptec 2430SA (Skyray) - 9005:0285:9005:0288 Adaptec 3230S (Harrier) - 9005:0285:9005:0289 Adaptec 3240S (Tornado) - 9005:0285:9005:0298 Adaptec 4000SAS (BlackBird) 9005:0285:9005:0297 Adaptec 4005SAS (AvonPark) + 9005:0285:9005:0298 Adaptec 4000SAS (BlackBird) 9005:0285:9005:0299 Adaptec 4800SAS (Marauder-X) 9005:0285:9005:029a Adaptec 4805SAS (Marauder-E) + 9005:0286:9005:029b Adaptec 2820SA (Intruder) + 9005:0286:9005:029c Adaptec 2620SA (Intruder) + 9005:0286:9005:029d Adaptec 2420SA (Intruder HP release) 9005:0286:9005:02a2 Adaptec 3800SAS (Hurricane44) + 9005:0286:9005:02a7 Adaptec 3805SAS (Hurricane80) + 9005:0286:9005:02a8 Adaptec 3400SAS (Hurricane40) + 9005:0286:9005:02ac Adaptec 1800SAS (Typhoon44) + 9005:0286:9005:02b3 Adaptec 2400SAS (Hurricane40lm) + 9005:0285:9005:02b5 Adaptec ASR5800 (Voodoo44) + 9005:0285:9005:02b6 Adaptec ASR5805 (Voodoo80) + 9005:0285:9005:02b7 Adaptec ASR5808 (Voodoo08) 1011:0046:9005:0364 Adaptec 5400S (Mustang) 1011:0046:9005:0365 Adaptec 5400S (Mustang) - 9005:0283:9005:0283 Adaptec Catapult (3210S with arc firmware) - 9005:0284:9005:0284 Adaptec Tomcat (3410S with arc firmware) 9005:0287:9005:0800 Adaptec Themisto (Jupiter) 9005:0200:9005:0200 Adaptec Themisto (Jupiter) 9005:0286:9005:0800 Adaptec Callisto (Jupiter) @@ -64,18 +69,20 @@ Supported Cards/Chipsets 9005:0285:9005:0290 IBM ServeRAID 7t (Jaguar) 9005:0285:1014:02F2 IBM ServeRAID 8i (AvonPark) 9005:0285:1014:0312 IBM ServeRAID 8i (AvonParkLite) - 9005:0286:1014:9580 IBM ServeRAID 8k/8k-l8 (Aurora) 9005:0286:1014:9540 IBM ServeRAID 8k/8k-l4 (AuroraLite) - 9005:0286:9005:029f ICP ICP9014R0 (Lancer) + 9005:0286:1014:9580 IBM ServeRAID 8k/8k-l8 (Aurora) + 9005:0286:1014:034d IBM ServeRAID 8s (Hurricane) 9005:0286:9005:029e ICP ICP9024R0 (Lancer) + 9005:0286:9005:029f ICP ICP9014R0 (Lancer) 9005:0286:9005:02a0 ICP ICP9047MA (Lancer) 9005:0286:9005:02a1 ICP ICP9087MA (Lancer) + 9005:0286:9005:02a3 ICP ICP5445AU (Hurricane44) 9005:0286:9005:02a4 ICP ICP9085LI (Marauder-X) 9005:0286:9005:02a5 ICP ICP5085BR (Marauder-E) - 9005:0286:9005:02a3 ICP ICP5445AU (Hurricane44) 9005:0286:9005:02a6 ICP ICP9067MA (Intruder-6) - 9005:0286:9005:02a9 ICP ICP5087AU (Skyray) - 9005:0286:9005:02aa ICP ICP5047AU (Skyray) + 9005:0286:9005:02a9 ICP ICP5085AU (Hurricane80) + 9005:0286:9005:02aa ICP ICP5045AU (Hurricane40) + 9005:0286:9005:02b4 ICP ICP5045AL (Hurricane40lm) People ------------------------- diff --git a/Documentation/scsi/arcmsr_spec.txt b/Documentation/scsi/arcmsr_spec.txt new file mode 100644 index 00000000000..5e0042340fd --- /dev/null +++ b/Documentation/scsi/arcmsr_spec.txt @@ -0,0 +1,574 @@ +******************************************************************************* +** 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 +************************************************************************** diff --git a/Documentation/scsi/libsas.txt b/Documentation/scsi/libsas.txt new file mode 100644 index 00000000000..9e2078b2a61 --- /dev/null +++ b/Documentation/scsi/libsas.txt @@ -0,0 +1,484 @@ +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. diff --git a/Documentation/scsi/ppa.txt b/Documentation/scsi/ppa.txt index 0dac88d86d8..5d9223bc1bd 100644 --- a/Documentation/scsi/ppa.txt +++ b/Documentation/scsi/ppa.txt @@ -12,5 +12,3 @@ http://www.torque.net/parport/ Email list for Linux Parport linux-parport@torque.net -Email for problems with ZIP or ZIP Plus drivers -campbell@torque.net diff --git a/Documentation/scsi/tmscsim.txt b/Documentation/scsi/tmscsim.txt index e165229adf5..df7a02bfb5b 100644 --- a/Documentation/scsi/tmscsim.txt +++ b/Documentation/scsi/tmscsim.txt @@ -109,7 +109,7 @@ than the 33.33 MHz being in the PCI spec. If you want to share the IRQ with another device and the driver refuses to do so, you might succeed with changing the DC390_IRQ type in tmscsim.c to -SA_SHIRQ | SA_INTERRUPT. +IRQF_SHARED | IRQF_DISABLED. 3.Features |