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* In camisr() clear CAM_SIM_ON_DONEQ flag after camisr_runqueue() purged SIMAlexander Motin2012-06-211-1/+1
| | | | | | | | | | | | | done queue. Clearing it before caused extra SIM queueing in some cases. It was invisible during normal operation, but during USB device unplug and respective SIM destruction it could keep pointer on SIM without having counted reference and as result crash the system by use afer free. Reported by: hselasky MFC after: 1 week Notes: svn path=/head/; revision=237398
* Fix several reference counting and object lifetime issues betweenKenneth D. Merry2012-06-201-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the pass(4) and enc(4) drivers and devfs. The pass(4) driver uses the destroy_dev_sched() routine to schedule its device node for destruction in a separate thread context. It does this because the passcleanup() routine can get called indirectly from the passclose() routine, and that would cause a deadlock if the close routine tried to destroy its own device node. In any case, once a particular passthrough driver number, e.g. pass3, is destroyed, CAM considers that unit number (3 in this case) available for reuse. The problem is that devfs may not be done cleaning up the previous instance of pass3, and will panic if isn't done cleaning up the previous instance. The solution is to get a callback from devfs when the device node is removed, and make sure we hold a reference to the peripheral until that happens. Testing exposed some other cases where we have reference counting issues, and those were also fixed in the pass(4) driver. cam_periph.c: In camperiphfree(), reorder some of the operations. The peripheral destructor needs to be called before the peripheral is removed from the peripheral is removed from the list. This is because once we remove the peripheral from the list, and drop the topology lock, the peripheral number may be reused. But if the destructor hasn't been called yet, there may still be resources hanging around (like devfs nodes) that haven't been fully cleaned up. cam_xpt.c: Add an argument to xpt_remove_periph() to indicate whether the topology lock is already held. scsi_enc.c: Acquire an extra reference to the peripheral during registration, and release it once we get a callback from devfs indicating that the device node is gone. Call destroy_dev_sched_cb() in enc_oninvalidate() instead of calling destroy_dev() in the cleanup routine. scsi_pass.c: Add reference counting to handle peripheral and devfs object lifetime issues. Add a reference to the peripheral and the devfs node in the peripheral registration. Don't attempt to add a physical path alias if the peripheral has been marked invalid. Release the devfs reference once the initial physical path alias taskqueue run has completed. Schedule devfs node destruction in the passoninvalidate(), and release our peripheral reference in a new routine, passdevgonecb() once the devfs node is gone. This allows the peripheral to fully go away, and the peripheral destructor, passcleanup(), will get called. MFC after: 3 days Sponsored by: Spectra Logic Notes: svn path=/head/; revision=237328
* Add CAM_DEBUG_INFO debug messages for periph created/invalidated/destroyedAlexander Motin2012-06-071-3/+25
| | | | | | | and for asyncs sent. Notes: svn path=/head/; revision=236713
* To make CAM debugging easier, compile in some debug flags (CAM_DEBUG_INFO,Alexander Motin2012-06-071-26/+10
| | | | | | | | | | | | | CAM_DEBUG_CDB, CAM_DEBUG_PERIPH and CAM_DEBUG_PROBE) by default. List of these flags can be modified with CAM_DEBUG_COMPILE kernel option. CAMDEBUG kernel option still enables all possible debug, if not overriden. Additional 50KB of kernel size is a good price for the ability to debug problems without rebuilding the kernel. In case where size is important, debugging can be compiled out by setting CAM_DEBUG_COMPILE option to 0. Notes: svn path=/head/; revision=236712
* Replace #ifdef CAMDEBUG + if + panic() with single KASSERT().Alexander Motin2012-06-051-7/+2
| | | | Notes: svn path=/head/; revision=236605
* Rewrite enabling NCQ for SATA devices in a way more alike to SCSI TCQ.Alexander Motin2012-06-021-3/+9
| | | | | | | | | | This allows to control it with `camcontrol negotiate adaX -T (en|dis)able` on the fly, same as for SCSI devices. Sponsored by: iXsystems, Inc. Notes: svn path=/head/; revision=236437
* Use AC_GETDEV_CHANGED async to notify ada driver about DMA and NCQ statusAlexander Motin2012-06-011-0/+2
| | | | | | | change. Now that allows switching between PIO and DMA modes on the fly. Notes: svn path=/head/; revision=236393
* Allow to change number of openings (used tags) for ATA/SATA devicesAlexander Motin2012-05-291-11/+7
| | | | | | | | | | via `camcontrol tags ... -N ...`. There is no need to tune it in usual cases, but some users want to have it for debugging purposes. MFC after: 2 weeks Notes: svn path=/head/; revision=236234
* MFprojects/zfsd:Alexander Motin2012-05-241-1/+5
| | | | | | | | | | | - Add low-level support for SATA Enclosure Management Bridge (SEMB) devices -- SATA equivalents of the SCSI SES/SAF-TE devices. - Add some utility functions for SCSI SAF-TE devices access. Sponsored by: iXsystems, Inc. Notes: svn path=/head/; revision=235897
* Add two functions xpt_batch_start() and xpt_batch_done() to the CAM SIM KPIAlexander Motin2012-05-121-1/+21
| | | | | | | | | | | | to allow drivers to handle request completion directly without passing them to the CAM SWI thread removing extra context switch. Modify all ATA/SATA drivers to use them. Reviewed by: gibbs, ken MFC after: 2 weeks Notes: svn path=/head/; revision=235333
* Add CAM infrastructure to allow reporting when a drive's long read capacityKenneth D. Merry2012-01-261-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | data changes. cam_ccb.h: Add a new advanced information type, CDAI_TYPE_RCAPLONG, for long read capacity data. cam_xpt_internal.h: Add a read capacity data pointer and length to struct cam_ed. cam_xpt.c: Free the read capacity buffer when a device goes away. While we're here, make sure we don't leak memory for other malloced fields in struct cam_ed. scsi_all.c: Update the scsi_read_capacity_16() to take a uint8_t * and a length instead of just a pointer to the parameter data structure. This will hopefully make this function somewhat immune to future changes in the parameter data. scsi_all.h: Add some extra bit definitions to struct scsi_read_capacity_data_long, and bump up the structure size to the full size specified by SBC-3. Change the prototype for scsi_read_capacity_16(). scsi_da.c: Register changes in read capacity data with the transport layer. This allows the transport layer to send out an async notification to interested parties. Update the dasetgeom() API. Use scsi_extract_sense_len() instead of scsi_extract_sense(). scsi_xpt.c: Add support for the new CDAI_TYPE_RCAPLONG advanced information type. Make sure we set the physpath pointer to NULL after freeing it. This allows blindly freeing it in the struct cam_ed destructor. sys/param.h: Bump __FreeBSD_version from 1000005 to 1000006 to make it easier for third party drivers to determine that the read capacity data async notification is available. camcontrol.c, mptutil/mpt_cam.c: Update these for the new scsi_read_capacity_16() argument structure. Sponsored by: Spectra Logic Notes: svn path=/head/; revision=230590
* Fix a race condition in CAM peripheral free handling, lockingKenneth D. Merry2012-01-121-10/+110
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | in the CAM XPT bus traversal code, and a number of other periph level issues. cam_periph.h, cam_periph.c: Modify cam_periph_acquire() to test the CAM_PERIPH_INVALID flag prior to allowing a reference count to be gained on a peripheral. Callers of this function will receive CAM_REQ_CMP_ERR status in the situation of attempting to reference an invalidated periph. This guarantees that a peripheral scheduled for a deferred free will not be accessed during its wait for destruction. Panic during attempts to drop a reference count on a peripheral that already has a zero reference count. In cam_periph_list(), use a local sbuf with SBUF_FIXEDLEN set so that mallocs do not occur while the xpt topology lock is held, regardless of the allocation policy of the passed in sbuf. Add a new routine, cam_periph_release_locked_buses(), that can be called when the caller already holds the CAM topology lock. Add some extra debugging for duplicate peripheral allocations in cam_periph_alloc(). Treat CAM_DEV_NOT_THERE much the same as a selection timeout (AC_LOST_DEVICE is emitted), but forgo retries. cam_xpt.c: Revamp the way the EDT traversal code does locking and reference counting. This was broken, since it assumed that the EDT would not change during traversal, but that assumption is no longer valid. So, to prevent devices from going away while we traverse the EDT, make sure we properly lock everything and hold references on devices that we are using. The two peripheral driver traversal routines should be examined. xptpdperiphtraverse() holds the topology lock for the entire time it runs. xptperiphtraverse() is now locked properly, but only holds the topology lock while it is traversing the list, and not while the traversal function is running. The bus locking code in xptbustraverse() should also be revisited at a later time, since it is complex and should probably be simplified. scsi_da.c: Pay attention to the return value from cam_periph_acquire(). Return 0 always from daclose() even if the disk is now gone. Add some rudimentary error injection support. scsi_sg.c: Fix reference counting in the sg(4) driver. The sg driver was calling cam_periph_release() on close, but never called cam_periph_acquire() (which increments the reference count) on open. The periph code correctly complained that the sg(4) driver was trying to decrement the refcount when it was already 0. Sponsored by: Spectra Logic MFC after: 2 weeks Notes: svn path=/head/; revision=230000
* Move the scsi_da_bios_params() prototype from pc98_machdep.h to md_var.hMarius Strobl2011-11-271-4/+0
| | | | | | | | where the prototype for pc98_ata_disk_firmware_geom_adjust() also lives in order to avoid an #ifdef'ed include in cam(4). Notes: svn path=/head/; revision=228027
* For sparc64 also adjust the geometry of da(4) driven disks to not overflowMarius Strobl2011-11-271-1/+7
| | | | | | | | | | | | | | the 16-bit cylinders field of the VTOC8 disk label (at around 502GB). The geometry chosen for disks above that limit allows to use disks up to 2TB, which is the limit of the extended VTOC8 format. The geometry used for disks smaller than the 16-bit cylinders limit stays the same as used by cam_calc_geometry(9) for extended translation. Thanks to Hans-Joerg Sirtl for providing hardware for testing this change. MFC after: 3 days Notes: svn path=/head/; revision=228022
* Introduce CAM_SIM_POLLED SIM flag, indicating that it works in polling mode.Alexander Motin2011-11-171-1/+7
| | | | | | | | | | | | | | It blocks CAM SWI usage on requests completion, unneeded because of polling and denied during kernel dumping because of blocked scheduler. Before r198899 there was periph flag CAM_PERIPH_POLLED, but that was wrong, because there is whole SIM is polled or handled by SWI, not a single periph. Tested by: kib MFC after: 1 month Notes: svn path=/head/; revision=227637
* Fixes for sure bus reference miscounting and potential device andMatt Jacob2011-08-121-15/+56
| | | | | | | | | | | | | | target reference miscounts. It also adds a helper function to get the current reference counts for components of cam_path for debug aid. One minor style(9) change. Partially Obtained from: Chuck Tuffli (Emulex) Reviewed by: scsi@ (ken) Approved by: re (kib) MFC after: 1 month Notes: svn path=/head/; revision=224806
* cam/cam_xpt.c:Justin T. Gibbs2011-06-261-2/+2
| | | | | | | | | | | In camisr_runqueue(), we need to run the sims queue regardless of whether or not the current peripheral has more work to do. This reverts a change mistakenly made in revision 223081. Reported by: ache Notes: svn path=/head/; revision=223556
* Lay groundwork in CAM for recording and reporting physical path andJustin T. Gibbs2011-06-141-43/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | other device attributes stored in the CAM Existing Device Table (EDT). This includes some infrastructure requried by the enclosure services driver to export physical path information. Make the CAM device advanced info interface accept store requests. sys/cam/scsi/scsi_all.c: sys/cam/scsi/scsi_all.h: - Replace scsi_get_sas_addr() with a scsi_get_devid() which takes a callback that decides whether to accept a particular descriptor. Provide callbacks for NAA IEEE Registered addresses and for SAS addresses, replacing the old function. This is needed because the old function doesn't work for an enclosure address for a SAS device, which is not flagged as a SAS address, but is NAA IEEE Registered. It may be worthwhile merging this interface with the devid match interface. - Add a few more defines for some device ID fields. sbin/camcontrol/camcontrol.c: - Update for the CCB_DEV_ADVINFO interface change. cam/cam_xpt_internal.h: - Add the new fields for the physical path string to the CAM EDT. cam/cam_ccb.h: - Rename CCB_GDEV_ADVINFO to simply CCB_DEV_ADVINFO, and the ccb structure to ccb_dev_advinfo. - Add a flag that changes this CCB's action to store, rather than the default, retrieve. - Add a new buffer type, CDAI_TYPE_PHYS_PATH, for the new CAM EDT physpath field. - Remove the never-implemented transport & proto flags. cam/cam_xpt.c: cam/cam_xpt.h: - Add xpt_getattr(), which provides a wrapper for fetching a device's attribute using the GEOM strings as key. This method currently supports "GEOM::ident" and "GEOM::physpath". Submitted by: will Reviewed by : gibbs Extend the XPT_DEV_MATCH api to allow a device search by device ID. As far as the API is concerned, device ID is a binary blob to be interpreted by the transport layer. The SCSI implementation assumes it is an array of VPD device ID descriptors. sys/cam/cam_ccb.h: Create a new structure, device_id_match_pattern, and update the XPT_DEV_MATCH datastructures and flags so that this pattern type can be used. sys/cam/cam_xpt.c: - A single pattern matching on both inquiry data and device ID is invalid. Report any violators. - Pass device ID match requests through to the new routine scsi_devid_match(). The direct call of a SCSI routine is a layering violation, but no worse than the one a few lines up that checks inquiry data. Defer cleaning this up until our future, larger, rototilling of CAM. - Zero out cam_ed and cam_et nodes on allocation. Prior to this change, device_id_len and device_id were not inialized, preventing proper detection of the presence of this information. sys/cam/scsi/scsi_all.c: sys/cam/scsi/scsi_all.h: Add the scsi_match_devid() routine. Add a helper function for extracting peripherial driver names sys/cam/cam_periph.c: sys/cam/cam_periph.h: Add the cam_periph_list() method which fills an sbuf with a comma delimited list of the peripheral instances associated with a given CAM path. Add a helper functions for SCSI commands used by the SES driver. sys/cam/scsi/scsi_all.c: sys/cam/scsi/scsi_all.h: Add structure definitions and csio filling functions for the receive diagnostic results and send diagnostic commands. Misc CAM XPT cleanups. sys/cam/cam_xpt.c: Broadcast AC_FOUND_DEVICE and AC_PATH_REGISTERED events at the time async event handlers are attached even when registering just for events on a partitular SIM. Previously, you had to register for these events on all SIMs in the system in order to get the initial broadcast even though subsequent device and path arrivals would be delivered. sys/cam/cam_xpt.c: Remove SIM mutex held asserts from path accessors. CAM paths are reference counted and it is this reference count, not the sim mutex, that garantees they are stable. Sponsored by: Spectra Logic Corporation Notes: svn path=/head/; revision=223081
* Do not report legacy unit numbers (do not create legacy aliases) for disksAlexander Motin2011-05-031-3/+6
| | | | | | | | on port multiplier ports above first two. They don't fit into ATA_STATIC_ID scheme and so can't be mapped properly. No need to pollute dev. Notes: svn path=/head/; revision=221384
* Make CAM_DEBUG_CDB also dump ATA commands in addition to SCSI.Alexander Motin2011-04-291-28/+29
| | | | Notes: svn path=/head/; revision=221201
* - Add shim to simplify migration to the CAM-based ATA. For each new adaXAlexander Motin2011-04-261-0/+36
| | | | | | | | | | | | device in /dev/ create symbolic link with adY name, trying to mimic old ATA numbering. Imitation is not complete, but should be enough in most cases to mount file systems without touching /etc/fstab. - To know what behavior to mimic, restore ATA_STATIC_ID option in cases where it was present before. - Add some more details to UPDATING. Notes: svn path=/head/; revision=221071
* Remove some used variables.Alexander Motin2011-04-181-4/+0
| | | | | | | Found with: Clang Static Analyzer Notes: svn path=/head/; revision=220785
* Fix typos - remove duplicate "the".Rebecca Cran2011-02-211-2/+2
| | | | | | | | | PR: bin/154928 Submitted by: Eitan Adler <lists at eitanadler.com> MFC after: 3 days Notes: svn path=/head/; revision=218909
* Fix up a few more sysctl(9) mis-typing found in various LINT builds.Matthew D Fleming2011-01-131-2/+2
| | | | Notes: svn path=/head/; revision=217368
* Add Serial Management Protocol (SMP) passthrough support to CAM.Kenneth D. Merry2010-11-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This includes support in the kernel, camcontrol(8), libcam and the mps(4) driver for SMP passthrough. The CAM SCSI probe code has been modified to fetch Inquiry VPD page 0x00 to determine supported pages, and will now fetch page 0x83 in addition to page 0x80 if supported. Add two new CAM CCBs, XPT_SMP_IO, and XPT_GDEV_ADVINFO. The SMP CCB is intended for SMP requests and responses. The ADVINFO is currently used to fetch cached VPD page 0x83 data from the transport layer, but is intended to be extensible to fetch other types of device-specific data. SMP-only devices are not currently represented in the CAM topology, and so the current semantics are that the SIM will route SMP CCBs to either the addressed device, if it contains an SMP target, or its parent, if it contains an SMP target. (This is noted in cam_ccb.h, since it will change later once we have the ability to have SMP-only devices in CAM's topology.) smp_all.c, smp_all.h: New helper routines for SMP. This includes SMP request building routines, response parsing routines, error decoding routines, and structure definitions for a number of SMP commands. libcam/Makefile: Add smp_all.c to libcam, so that SMP functionality is available to userland applications. camcontrol.8, camcontrol.c: Add smp passthrough support to camcontrol. Several new subcommands are now available: 'smpcmd' functions much like 'cmd', except that it allows the user to send generic SMP commands. 'smprg' sends the SMP report general command, and displays the decoded output. It will automatically fetch extended output if it is available. 'smppc' sends the SMP phy control command, with any number of potential options. Among other things, this allows the user to reset a phy on a SAS expander, or disable a phy on an expander. 'smpmaninfo' sends the SMP report manufacturer information and displays the decoded output. 'smpphylist' displays a list of phys on an expander, and the CAM devices attached to those phys, if any. cam.h, cam.c: Add a status value for SMP errors (CAM_SMP_STATUS_ERROR). Add a missing description for CAM_SCSI_IT_NEXUS_LOST. Add support for SMP commands to cam_error_string(). cam_ccb.h: Rename the CAM_DIR_RESV flag to CAM_DIR_BOTH. SMP commands are by nature bi-directional, and we may need to support bi-directional SCSI commands later. Add the XPT_SMP_IO CCB. Since SMP commands are bi-directional, there are pointers for both the request and response. Add a fill routine for SMP CCBs. Add the XPT_GDEV_ADVINFO CCB. This is currently used to fetch cached page 0x83 data from the transport later, but is extensible to fetch many other types of data. cam_periph.c: Add support in cam_periph_mapmem() for XPT_SMP_IO and XPT_GDEV_ADVINFO CCBs. cam_xpt.c: Add support for executing XPT_SMP_IO CCBs. cam_xpt_internal.h: Add fields for VPD pages 0x00 and 0x83 in struct cam_ed. scsi_all.c: Add scsi_get_sas_addr(), a function that parses VPD page 0x83 data and pulls out a SAS address. scsi_all.h: Add VPD page 0x00 and 0x83 structures, and a prototype for scsi_get_sas_addr(). scsi_pass.c: Add support for mapping buffers in XPT_SMP_IO and XPT_GDEV_ADVINFO CCBs. scsi_xpt.c: In the SCSI probe code, first ask the device for VPD page 0x00. If any VPD pages are supported, that page is required to be implemented. Based on the response, we may probe for the serial number (page 0x80) or device id (page 0x83). Add support for the XPT_GDEV_ADVINFO CCB. sys/conf/files: Add smp_all.c. mps.c: Add support for passing in a uio in mps_map_command(), so we can map a S/G list at once. Add support for SMP passthrough commands in mps_data_cb(). SMP is a special case, because the first buffer in the S/G list is outbound and the second buffer is inbound. Add support for warning the user if the busdma code comes back with more buffers than will work for the command. This will, for example, help the user determine why an SMP command failed if busdma comes back with three buffers. mps_pci.c: Add sys/uio.h. mps_sas.c: Add the SAS address and the parent handle to the list of fields we pull from device page 0 and cache in struct mpssas_target. These are needed for SMP passthrough. Add support for the XPT_SMP_IO CCB. For now, this CCB is routed to the addressed device if it supports SMP, or to its parent if it does not and the parent does. This is necessary because CAM does not currently support SMP-only nodes in the topology. Make SMP passthrough support conditional on __FreeBSD_version >= 900026. This will make it easier to MFC this change to the driver without MFCing the CAM changes as well. mps_user.c: Un-staticize mpi_init_sge() so we can use it for the SMP passthrough code. mpsvar.h: Add a uio and iovecs into struct mps_command for SMP passthrough commands. Add a cm_max_segs field to struct mps_command so that we can warn the user if busdma comes back with too many segments. Clear the cm_reply when a command gets freed. If it is not cleared, reply frames will eventually get freed into the pool multiple times and corrupt the pool. (This fix is from scottl.) Add a prototype for mpi_init_sge(). sys/param.h: Bump __FreeBSD_version to 900026 for the for the inclusion of the XPT_GDEV_ADVINFO and XPT_SMP_IO CAM CCBs. Notes: svn path=/head/; revision=216088
* Mostly revert r203420, and add similar functionality into ada(4) since theRebecca Cran2010-10-241-93/+0
| | | | | | | | | | | | | | | | | | | | existing code caused problems with some SCSI controllers. A new sysctl kern.cam.ada.spindown_shutdown has been added that controls whether or not to spin-down disks when shutting down. Spinning down the disks unloads/parks the heads - this is much better than removing power when the disk is still spinning because otherwise an Emergency Unload occurs which may cause damage to the actuator. PR: kern/140752 Submitted by: olli Reviewed by: arundel Discussed with: mav MFC after: 2 weeks Notes: svn path=/head/; revision=214279
* Decrease poll interval from 1000 to 100us. This significantly reducesAlexander Motin2010-09-221-3/+3
| | | | | | | kernel dump time, especially with minidump. Notes: svn path=/head/; revision=212991
* Don't lock buses around a call to xptperiphlistmatch- the buses will beMatt Jacob2010-06-291-2/+0
| | | | | | | | | | locked at appropriate places. MFC after: 1 week X-MFC: 208752 Notes: svn path=/head/; revision=209590
* Implement the usage of Report Luns as part of SCSI probing for SCP3 orMatt Jacob2010-06-081-6/+14
| | | | | | | | | | | | | | better devices. This can be disabled on a per-device basis using quirks as well. This also handles the case where there is actually no connected LUN 0 (which can definitely be the case for storage arrays). Reviewed by: scsi@ MFC after: 1 month Notes: svn path=/head/; revision=208911
* Protect periph drivers list and rearrange things to minimize the chance ofMatt Jacob2010-06-021-2/+7
| | | | | | | | | | | | | stepping oneself during probing. Don't blindly decrement a periph probe count. Reviewed by: scsi@ Obtained from: Alexander Motin, Atillio Rao, Others MFC after: 1 month Notes: svn path=/head/; revision=208752
* Add a new primitive, XPT_SCAN_TGT, to cover the range between scanning aMatt Jacob2010-05-261-10/+33
| | | | | | | | | | | | | | whole bus (XPT_SCAN_BUS) and a single lun on that bus (XPT_SCAN_LUN). It's less resource comsumptive than scanning a whole bus when the caller knows only one target has changes. Reviewed by: scsi@ Sponsored by: Panasas MFC after: 1 month Notes: svn path=/head/; revision=208582
* Add xpt_schedule_dev_sendq() call, lost at r203108. It is not needed inAlexander Motin2010-05-021-0/+2
| | | | | | | | | | usual operation, but required in some conditions to make queue running after being shrinked. MFC after: 3 days Notes: svn path=/head/; revision=207490
* Revert r198705.Alexander Motin2010-04-301-28/+1
| | | | | | | | | | | | | | As scottl@ noticed, max_target/max_lun was intended to be only a hint for existing bus scanner. Some FC/SAS SIMs report fake values there, that are smaller then maximum supported IDs. In that case this check makes impossible manual scan outside hinted range. For ATA/SATA SIMs respective check was instead implemented at SIM level. Newer SCSI SIMs expected to have these checks at driver or firmware level. Some older SCSI SIMs have no this check and the issues will get back there. Notes: svn path=/head/; revision=207433
* For unhandled actions in xpt_action_default, remember to callMatt Jacob2010-03-311-2/+5
| | | | | | | | | | | | | xpt_done for queued requests. This solves the problem of indefinite hangs for unspecified transports when XPT_SCAN_BUS is called. A few minor cosmetics elsewhere. MFC after: 1 week Notes: svn path=/head/; revision=205993
* Fix newlines broken at r204220.Alexander Motin2010-02-261-1/+1
| | | | Notes: svn path=/head/; revision=204353
* Make xpt_rescan() more correct, as it was before r197208: do not useAlexander Motin2010-02-231-1/+2
| | | | | | | XPT_SCAN_LUN for wildcard LUN, fall back to XPT_SCAN_BUS. Notes: svn path=/head/; revision=204253
* Virtualize transport part of periph announcement.Alexander Motin2010-02-221-148/+7
| | | | Notes: svn path=/head/; revision=204220
* Improve output for controllers that doesn't report SATA speed.Alexander Motin2010-02-221-0/+2
| | | | Notes: svn path=/head/; revision=204195
* Disable kern.cam.power_down ATM. It doesn't work fine on some controllers.Alexander Motin2010-02-031-1/+1
| | | | Notes: svn path=/head/; revision=203440
* MFp4:Alexander Motin2010-02-031-2/+94
| | | | | | | | | Make CAM to stop all attached devices on system shutdown. It allows devices to park heads, reducing stress on power loss. Add `kern.cam.power_down` tunable and sysctl to controll it. Notes: svn path=/head/; revision=203420
* Change the way in which fake async events generated. Do not useAlexander Motin2010-02-021-60/+24
| | | | | | | taskqueue for lock decoupling, as it causes unwanted races. Notes: svn path=/head/; revision=203386
* Some missed parts for r203376.Alexander Motin2010-02-021-2/+6
| | | | Notes: svn path=/head/; revision=203384
* MFp4: Large set of CAM inprovements.Alexander Motin2010-01-281-376/+284
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Unify bus reset/probe sequence. Whenever bus attached at boot or later, CAM will automatically reset and scan it. It allows to remove duplicate code from many drivers. - Any bus, attached before CAM completed it's boot-time initialization, will equally join to the process, delaying boot if needed. - New kern.cam.boot_delay loader tunable should help controllers that are still unable to register their buses in time (such as slow USB/ PCCard/ CardBus devices), by adding one more event to wait on boot. - To allow synchronization between different CAM levels, concept of requests priorities was extended. Priorities now split between several "run levels". Device can be freezed at specified level, allowing higher priority requests to pass. For example, no payload requests allowed, until PMP driver enable port. ATA XPT negotiate transfer parameters, periph driver configure caching and so on. - Frozen requests are no more counted by request allocation scheduler. It fixes deadlocks, when frozen low priority payload requests occupying slots, required by higher levels to manage theit execution. - Two last changes were holding proper ATA reinitialization and error recovery implementation. Now it is done: SATA controllers and Port Multipliers now implement automatic hot-plug and should correctly recover from timeouts and bus resets. - Improve SCSI error recovery for devices on buses without automatic sense reporting, such as ATAPI or USB. For example, it allows CAM to wait, while CD drive loads disk, instead of immediately return error status. - Decapitalize diagnostic messages and make them more readable and sensible. - Teach PMP driver to limit maximum speed on fan-out ports. - Make boot wait for PMP scan completes, and make rescan more reliable. - Fix pass driver, to return CCB to user level in case of error. - Increase number of retries in cd driver, as device may return several UAs. Notes: svn path=/head/; revision=203108
* MFp4:Alexander Motin2009-11-241-4/+21
| | | | | | | | | | | | | | | - Extend XPT-SIM transfer settings control API. Now it allows to report to SATA SIM number of tags supported by each device, implement ATA mode and SATA revision negotiation for both SATA and PATA SIMs. - Make ahci(4) and siis(4) to use submitted maximum tag number, when scheduling requests. It allows to support NCQ on devices with lower tags count then controller supports. - Make PMP driver to report attached devices connection speeds. - Implement ATA mode negotiation between user settings, device and controller capabilities. Notes: svn path=/head/; revision=199747
* MFp4:Alexander Motin2009-11-141-37/+3
| | | | | | | | | Remove code that years ago was closing race between request submission to SIM and device/SIM freeze. That race become impossible after moving from spl to mutex locking, while this workaround causes some unexpected effects. Notes: svn path=/head/; revision=199280
* MFp4:Alexander Motin2009-11-111-8/+52
| | | | | | | | | | | | | - Move tagged queueing control from ADA to ATA XPT. It allows to control device command queue length correctly. First step to support < 32 tags. - Limit queue for non-tagged devices by 2 slots for ahci(4) and siis(4). - Implement quirk matching for ATA devices. - Move xpt_schedule_dev_sendq() from header to source file. - Move delayed queue shrinking to the more expected place - element freeing. - Remove some SCSIsms in ATA. Notes: svn path=/head/; revision=199178
* MFp4:Alexander Motin2009-11-041-19/+12
| | | | | | | | | | | | - Remove CAM_PERIPH_POLLED flag. It is broken by design. Polling can't be periph flag. May be SIM, may be CCB, but now it works fine just without it. - Remove check unused for at least five years. If we will ever have non-BIO devices in CAM, this check is smallest of what we will need. - If several controllers complete requests same time, call swi_sched() only once. Notes: svn path=/head/; revision=198899
* The async callback could free the device. If it is a broadcast async,Alexander Motin2009-11-021-1/+7
| | | | | | | | | it doesn't hold device reference, so take our own reference. Submitted by: thompsa Notes: svn path=/head/; revision=198782
* MFp4:Alexander Motin2009-11-011-21/+24
| | | | | | | | | | | | Fix reference counting bug, when device unreferenced before then invalidated. To do it, do not handle validity flag as another reference, but explicitly modify reference count each time flag is modified. Discovered by: thompsa Notes: svn path=/head/; revision=198748
* MFp4:Alexander Motin2009-10-311-8/+38
| | | | | | | | | | | | | | | - Reduce code duplication in ATA XPT and PMP driver. - Move PIO size setting from ada driver to ATA XPT. It is XPT business to negotiate transfer details. ada driver is now stateless. - Report PIO size to SIM. It is required for correct PATA SIM operation. - Tune PMP scan timings. It workarounds some problems with SiI. - If reset hapens during PMP initialization - restart it. - Introduce early-initialized periph drivers, which are used during initial scan process. Use it for xpt, probe, aprobe and pmp. It gives pmp chance to finish scan before mountroot and numerate devices in right order. Notes: svn path=/head/; revision=198708
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