The original NVMe API used bit-fields to represent fields in data
structures defined by the specification (e.g. the op-code in the command
data structure). The implementation targeted x86_64 processors and
defined the bit fields for little endian dwords (i.e. 32 bits).
This approach does not work as-is for big endian architectures and was
changed to use a combination of bit shifts and masks to support PowerPC.
Unfortunately, this changed the NVMe API and forces #ifdef's based on
the OS revision level in user space code.
This change reverts to something that looks like the original API, but
it uses bytes instead of bit-fields inside the packed command structure.
As a bonus, this works as-is for both big and little endian CPU
architectures.
Bump __FreeBSD_version to 1200081 due to API change
Reviewed by: imp, kbowling, smh, mav
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D16404
r330951 by smh fixed the mps driver to avoid deadlocks when panicing.
The same code is needed for mpr, so port it here, along with the fix
which allows the CCBs scheduled to complete avoiding at least a scary
message and likely other unintended consequences.
Sponsored by: Netflix
Differential Review: https://reviews.freebsd.org/D16663
opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.
Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.
Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.
Reviewed by: kib, cem, jhb, jtl
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14941
The mps(4) and mpr(4) drivers and hardware handle T10 Protection
Information, which is a system of checksums and guard blocks to protect
data while it is being transferred and while it is on disk. It is also
known as T10 DIF. For more details, see section 4.22 of the SBC-4 spec.
Supporting Type 2 protection requires using 32 byte CDBs, and filling in
the fields in those CDBs. We don't yet support that in the da(4) driver.
Type 1 and Type 3 protection don't require that, and can be handled by
the mps(4)/mpr(4) driver's code and firmware without any additional
input from the da(4) driver.
If a drive has Type 2 protection enabled (you frequently see this with
SAS drives shipped from Dell), don't set the various EEDP fields in the
mps(4)/mpr(4) driver command fields. Otherwise, you wind up with errors
like this that would otherwise make no sense:
(da9:mpr0:0:18:0): READ(10). CDB: 28 00 00 00 00 00 00 02 00 00
(da9:mpr0:0:18:0): CAM status: SCSI Status Error
(da9:mpr0:0:18:0): SCSI status: Check Condition
(da9:mpr0:0:18:0): SCSI sense: ILLEGAL REQUEST asc:20,0 (Invalid command operation code)
(da9:mpr0:0:18:0):
(da9:mpr0:0:18:0): Field Replaceable Unit: 0
(da9:mpr0:0:18:0): Command Specific Info: 0
(da9:mpr0:0:18:0):
(da9:mpr0:0:18:0): Descriptor 0x80: f8 21
(da9:mpr0:0:18:0): Descriptor 0x81: 00 00 00 00 00 00
(da9:mpr0:0:18:0): Error 22, Unretryable error
In other words, what kind of strange SAS hard drive doesn't support a
standard 10 byte SCSI READ command? In this case, one that has Type 2
protection enabled.
We can revisit this when we put Type 2 protection support in the da(4)
driver, but for now this will help people who put Type 2 formatted drives
in a system and wonder what in the world is going on.
MFC after: 3 days
Sponsored by: Spectra Logic
Version 16 is just a number bump, since we already had those changes.
Version 17 introduces new AdapterType value, that allows new user-space
tools from Broadcom to differentiate adapter generations 3 and 3.5.
Version 18 updates headers and adds SAS_DEVICE_DISCOVERY_ERROR reporting.
MFC after: 2 weeks
Chain frames required to satisfy all 2K of declared I/Os of 128KB each take
more then a megabyte of a physical memory, all of which existing code tries
allocate as physically contiguous. This patch removes that physical
contiguousness requirement, leaving only virtual contiguousness. I was
thinking about other ways of allocation, but the less granular allocation
becomes, the bigger is the overhead and/or complexity, reaching about 100%
overhead if allocate each frame separately.
The patch also bumps the chain frames hard limit from 2K to 16K. It is more
than enough for the case of default REQ_FRAMES and MAXPHYS (the drivers will
allocate less than that automatically), while in case of increased MAXPHYS
it will control maximal memory usage.
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D14420
Remove bitfields from defined structures as they are not portable.
Instead use shift and mask macros in the driver and nvmecontrol application.
NVMe is now working on powerpc64 host.
Submitted by: Michal Stanek <mst@semihalf.com>
Obtained from: Semihalf
Reviewed by: imp, wma
Sponsored by: IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D13916
This is a first part of the change. It makes the drivers to calculate
the required number of chain frames to satisfy worst case scenarios, but
it does not change existing overly strict limits on them. The next step
will be to rewrite the allocator to not require megabytes of physically
contiguous address space, that may be problematic if done after boot,
after doing which the limits can be removed. Until that this code can
just correct user set limits, if they are set too high.
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D14261
a bit in the normal operation of the driver. Covert it to represent bytes
instead of 32bit words. Fix what I believe to be is a bug in this respect
with the Tri-mode cards.
Sponsored by: Netflix
Both drivers were found to report CAM bigger queue depth then they really
can handle. It made them later under high load with many disks return
some of submitted requests back with CAM_REQUEUE_REQ status for later
resubmission.
Reviewed by: scottl
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D14215
In mp{r,s}_diag_register(), which is used to register diagnostic
buffers with the mp{r,s}(4) firmware, we allocate DMAable memory.
There were several issues here:
o No checking of the bus_dmamap_load() return value. If the load
failed or got deferred, mp{r,s}_diag_register() continued on as if
nothing had happened. We now check the return value and bail
out if it fails.
o No waiting for a deferred load callback. bus_dmamap_load()
calls a supplied callback when the mapping is done. This is
generally done immediately, but it can be deferred.
mp{r,s}_diag_register() did not check to see whether the callback
was already done before proceeding on. We now sleep until the
callback is done if it is deferred.
o No call to bus_dmamap_sync(... BUS_DMASYNC_PREREAD) after the
memory is allocated and loaded. This is necessary on some
platforms to synchronize host memory that is going to be updated
by a device.
Both drivers would also panic if the firmware was reinitialized while
a diagnostic buffer operation was in progress. This fixes that problem
as well. (The driver will reinitialize the firmware in various
circumstances, but the problem I ran into was that the firmware would
generate an IOC Fault due to a PCIe error.)
mp{r,s}var.h:
Add a new structure, struct mpr_busdma_context, that is
used for deferred busdma load callbacks.
Add a prototype for mp{r,s}_memaddr_wait_cb().
mp{r,s}.c:
Add a new busdma callback function, mp{r,s}_memaddr_wait_cb().
This provides synchronization for callers that want to
wait on a deferred bus_dmamap_load() callback.
mp{r,s}_user.c:
In bus_dmamap_register(), add a call to bus_dmamap_sync()
with the BUS_DMASYNC_PREREAD flag set after an allocation
is loaded.
Also, check the return value of bus_dmamap_load(). If it
fails, bail out. If it is EINPROGRESS, wait for the
callback to happen. We use an interruptible sleep (msleep
with PCATCH) and let the callback clean things up if we get
interrupted.
In mpr_diag_read_buffer() and mps_diag_read_buffer(), call
bus_dmamap_sync(..., BUS_DMASYNC_POSTREAD) before copying
the data out to make sure the data is in stable storage.
In mp{r,s}_post_fw_diag_buffer() and
mp{r,s}_release_fw_diag_buffer(), check the reply to see
whether it is NULL. It can be NULL (and the command non-NULL)
if the controller gets reinitialized while we're waiting for
the command to complete but the driver structures aren't
reallocated. The driver structures generally won't be
reallocated unless there is a firmware upgrade that changes
one of the IOCFacts.
When freeing diagnostic buffers in mp{r,s}_diag_register()
and mp{r,s}_diag_unregister(), zero/NULL out the buffer after
freeing it. This will prevent a duplicate free in some
situations.
Sponsored by: Spectra Logic
Reviewed by: mav, scottl
MFC after: 1 week
Differential Revision: D13453
Summary:
Some architectures use large (36-bit) physical addresses, with smaller
virtual addresses. Casting between vm_paddr_t (or bus_addr_t) and void * is
considered illegal, so cast through uintptr_t. No functional change on existing
platforms.
Reviewed By: scottl
Differential Revision: https://reviews.freebsd.org/D14042
Uses of mallocarray(9).
The use of mallocarray(9) has rocketed the required swap to build FreeBSD.
This is likely caused by the allocation size attributes which put extra pressure
on the compiler.
Given that most of these checks are superfluous we have to choose better
where to use mallocarray(9). We still have more uses of mallocarray(9) but
hopefully this is enough to bring swap usage to a reasonable level.
Reported by: wosch
PR: 225197
Focus on code where we are doing multiplications within malloc(9). None of
these is likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.
This initial sweep only covers malloc(9) calls with M_NOWAIT. No good
reason but I started doing the changes before r327796 and at that time it
was convenient to make sure the sorrounding code could handle NULL values.
would attempt to re-allocate interrupts during a chip reset without
first de-allocating them. Doing that right is going to be tricky, so
just band-aid it for now so that a re-init doesn't guarantee a failure
due to resource re-use.
Reported by: gallatin
Sponsored by: Netflix
sys/dev/mpr/mpr_mapping.c
If _mapping_process_dpm_pg0 detects inconsistencies in the drive
mapping table (stored in the HBA's NVRAM), abort reading it and
continue to boot as if the mapping table were blank. I observed
such inconsistencies in several HBAs after upgrading firmware from
14.0.0.0 to 15.0.0.0.
Reviewed by: slm
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D12901
needed, but it silences an erroneous Coverity warning and makes the code a
little more logically consistent. Also mark the sysctl as MPSAFE.
Sponsored by: Netflix
commit it to make initiazation less chatty in the normal case, and more useful
and informative when real debugging is turned on.
Reviewed by: ken (earlier version)
Sponsored by: Netflix
When the mps(4) and mpr(4) drivers need to reinitialize the
firmware, they sometimes need to reallocate all of the memory
allocated by the driver. The reallocation happens whenever the IOC
Facts change. That should only happen after a firmware upgrade.
If the reinitialization happens as a result of a timed out command
sent to the card, the command that timed out and triggered the
reinit may have been freed if iocfacts_allocate() reallocated all
memory. If the caller attempts to access the command after that,
the kernel will panic because the caller will be dereferencing
freed memory.
The solution is to set a flag in the softc when we reallocate,
and avoid dereferencing the command strucure if we've reallocated.
The changes are largely the same in both drivers, since mpr(4) is a
derivative of mps(4).
o In iocfacts_allocate(), if the IOC Facts have changed and we
need to reallocate, set the REALLOCATED flag in the softc.
o Change wait_command() to take a struct mps_command ** instead of
a struct mps_command *. This allows us to NULL out the caller's
command pointer if we have to reinit the controller and the data
structures get reallocated. (The REALLOCATED flag will be set
in the softc if that has happened.)
o In every place that calls wait_command(), make sure we handle
the case where the command is NULL after the call.
o The mpr(4) driver has mpr_request_polled() which can also
reinitialize the card. Also check for reallocation there.
Reviewed by: scottl, slm
MFC after: 1 week
Sponsored by: Spectra Logic
the informational print functions. Collapse the debug API a bit to be
more generic and not require as much code duplication. While here, fix
a bug in MPS that was already fixed in MPR.
Do the allocation before requesting the IOCFacts message. This triggers
the LSI firmware to recognize the multiqueue should be enabled if available.
Multiqueue isn't used by the driver yet, but this also fixes a problem with
the cached IOCFacts not matching latter checks, leading to potential problems
with error recovery.
As a side-effect, fetch the driver tunables as early as possible.
Reviewed by: slm
Obtained from: Netflix
Differential Revision: D9243
mps_wait_command() and mpr_wait_command() were using getmicrotime() to
determine elapsed time when checking for a timeout in polled mode.
getmicrotime() isn't guaranteed to monotonically increase, and that
caused spurious timeouts occasionally.
Switch to using getmicrouptime(), which does increase monotonically.
This fixes the spurious timeouts in my test case.
Reviewed by: slm, scottl
MFC after: 3 days
Sponsored by: Spectra Logic
This includes NVMe device support and adds support for the following adapters:
SAS 3408
SAS 3416
SAS 3508
SAS 3516
SAS 3616
SAS 3708
SAS 3716
Reviewed by: ken, scottl, asomers, mav
Approved by: ken, scottl, mav
MFC after: 2 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D10095
This is mostly a version bump to stay in version number sync with firmware.
The only change there was cosmetic: Display degraded speed message upon
receiving Active Cable Exception Event with DEGRADED reason code.
Discussed with: slm@
MFC after: 1 week
Thought it's difficult to reproduce, I think this variable was responsible
for a use-after-free panic when a SATA disk timed out responding to a SATA
identify command during boot.
Submitted by: slm
Reviewed by: slm
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D9364
All of the printing from the tables file now has wrappers so that the
handling is cleaner and it's possible to print something out (say, during
development) without having to fight the global debug flags. This re-org
will also make it easier to have the tables be compiled out at build time
if desired.
Other than fixing some minor bugs, there are no user-visible changes from
this change
Sponsored by: Netflix, Inc.
Differential Revision: D9238
The sim_vid, hba_vid, and dev_name fields of struct ccb_pathinq are
fixed-length strings. AFAICT the only place they're read is in
sbin/camcontrol/camcontrol.c, which assumes they'll be null-terminated.
However, the kernel doesn't null-terminate them. A bunch of copy-pasted code
uses strncpy to write them, and doesn't guarantee null-termination. For at
least 4 drivers (mpr, mps, ciss, and hyperv), the hba_vid field actually
overflows. You can see the result by doing "camcontrol negotiate da0 -v".
This change null-terminates those fields everywhere they're set in the
kernel. It also shortens a few strings to ensure they'll fit within the
16-character field.
PR: 215474
Reported by: Coverity
CID: 1009997 1010000 1010001 1010002 1010003 1010004 1010005
CID: 1331519 1010006 1215097 1010007 1288967 1010008 1306000
CID: 1211924 1010009 1010010 1010011 1010012 1010013 1010014
CID: 1147190 1010017 1010016 1010018 1216435 1010020 1010021
CID: 1010022 1009666 1018185 1010023 1010025 1010026 1010027
CID: 1010028 1010029 1010030 1010031 1010033 1018186 1018187
CID: 1010035 1010036 1010042 1010041 1010040 1010039
Reviewed by: imp, sephe, slm
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D9037
Differential Revision: https://reviews.freebsd.org/D9038
that are apparently misconfigured by the manufacturer and cause the mapping
logic to fail. The fallback allows drive numbers to be assigned based on the
PHY number that they're attached to. Add sysctls and tunables to overrid
this new behavior, but they should be considered only necessary for debugging.
Reviewed by: imp, smh
Obtained from: Netflix
MFC after: 3 days
Sponsored by: D8403
This is due to the DevHandle not being released, which causes the Firmware to
not allow that disk to be re-added.
Reviewed by: ken, scottl, ambrisko, asomers
Approved by: ken, scottl, ambrisko
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6102
To prevent this, move check for done_ccb == NULL to before done_ccb is used in
mprsas_stop_unit_done().
Reviewed by: ken, scottl, ambrisko, asomers
Approved by: ken, scottl, ambrisko
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6099
It was possible to use an invalid pointer to get the target ID value. To fix
this, initialize a local Target ID variable to an invalid value and change that
variable to a valid value only if the pointer to the Target ID is not NULL.
Reviewed by: ken, scottl, ambrisko, asomers
Approved by: ken, scottl, ambrisko
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6100
Use MPI2_IOCSTATUS_MASK when checking IOCStatus to mask off the log bit, and
make a few more things endian-safe.
Reviewed by: ken, scottl, ambrisko, asomers
Approved by: ken, scottl, ambrisko
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6097
rounddown2 tends to produce longer lines than the original code
and when the code has a high indentation level it was not really
advantageous to do the replacement.
This tries to strike a balance between readability using the macros
and flexibility of having the expressions, so not everything is
converted.
sys/dev/mpr/mpr_sas_lsi.c
sys/dev/mps/mps_sas_lsi.c
When mp[rs]sas_get_sata_identify returns
MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR, don't bother retrying. Protocol
errors aren't likely to be fixed by sleeping.
Without this change, a system that generated may protocol errors due
to signal integrity issues was taking more than an hour to boot, due
to all the retries.
Reviewed by: slm
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4553
- Updated all files with 2015 Avago copyright, and updated LSI's copyright
dates.
- Changed all of the PCI device strings from LSI to Avago Technologies (LSI).
- Added a sysctl variable to control how StartStopUnit behavior works. User can
select to spin down disks based on if disk is SSD or HDD.
- Inquiry data is required to tell if a disk will support SSU at shutdown or
not. Due to the addition of mpssas_async, which gets Advanced Info but not
Inquiry data, the setting of supports_SSU was moved to the
mpssas_scsiio_complete function, which snoops for any Inquiry commands. And,
since disks are shutdown as a target and not a LUN, this process was
simplified by basing it on targets and not LUNs.
- Added a sysctl variable that sets the amount of time to retry after sending a
failed SATA ID command. This helps with some bad disks and large disks that
require a lot of time to spin up. Part of this change was to add a callout to
handle timeouts with the SATA ID command. The callout function is called
mpssas_ata_id_timeout(). (Fixes PR 191348)
- Changed the way resets work by allowing I/O to continue to devices that are
not currently under a reset condition. This uses devq's instead of simq's and
makes use of the MPSSAS_TARGET_INRESET flag. This change also adds a function
called mpssas_prepare_tm().
- Some changes were made to reduce code duplication when getting a SAS address
for a SATA disk.
- Fixed some formatting and whitespace.
- Bump version of mps driver to 9.255.01.00-fbsd
PR: 191348
Reviewed by: ken, scottl
Approved by: ken, scottl
MFC after: 1 week
message synced to the changes in r283632, those changes are now backed out.
Another commit will be done that is exactly the same as r283632 except it will
have to correct commit message.
Approved by: ken, scottl, asomers, gibbs
CDAI_FLAG_NONE advanced information CCB flag.
Support for the flag was merged to stable/10 in r279329, and the
__FreeBSD_version in stable/10 was bumped to 1001510.
Check for that version in the mps(4) and mpr(4) drivers when determining
whether to use the flag.
Sponsored by: Spectra Logic
MFC after: 3 days
properly.
If there is garbage in the flags field, it can sometimes include a
set CDAI_FLAG_STORE flag, which may cause either an error or
perhaps result in overwriting the field that was intended to be
read.
sys/cam/cam_ccb.h:
Add a new flag to the XPT_DEV_ADVINFO CCB, CDAI_FLAG_NONE,
that callers can use to set the flags field when no store
is desired.
sys/cam/scsi/scsi_enc_ses.c:
In ses_setphyspath_callback(), explicitly set the
XPT_DEV_ADVINFO flags to CDAI_FLAG_NONE when fetching the
physical path information. Instead of ORing in the
CDAI_FLAG_STORE flag when storing the physical path, set
the flags field to CDAI_FLAG_STORE.
sys/cam/scsi/scsi_sa.c:
Set the XPT_DEV_ADVINFO flags field to CDAI_FLAG_NONE when
fetching extended inquiry information.
sys/cam/scsi/scsi_da.c:
When storing extended READ CAPACITY information, set the
XPT_DEV_ADVINFO flags field to CDAI_FLAG_STORE instead of
ORing it into a field that isn't initialized.
sys/dev/mpr/mpr_sas.c,
sys/dev/mps/mps_sas.c:
When fetching extended READ CAPACITY information, set the
XPT_DEV_ADVINFO flags field to CDAI_FLAG_NONE instead of
setting it to 0.
sbin/camcontrol/camcontrol.c:
When fetching a device ID, set the XPT_DEV_ADVINFO flags
field to CDAI_FLAG_NONE instead of 0.
sys/sys/param.h:
Bump __FreeBSD_version to 1100061 for the new XPT_DEV_ADVINFO
CCB flag, CDAI_FLAG_NONE.
Sponsored by: Spectra Logic
MFC after: 1 week
Previously, any timeout value for which (timeout * hz) will overflow the
signed integer, will give weird results, since callout(9) routines will
convert negative values of ticks to '1'. For unsigned integer overflow we
will get sufficiently smaller timeout values than expected.
Switch from callout_reset, which requires conversion to int based ticks
to callout_reset_sbt to avoid this.
Also correct isci to correctly resolve ccb timeout.
This was based on the original work done by Eygene Ryabinkin
<rea@freebsd.org> back in 5 Aug 2011 which used a macro to help avoid
the overlow.
Differential Revision: https://reviews.freebsd.org/D1157
Reviewed by: mav, davide
MFC after: 1 month
Sponsored by: Multiplay
- Wrong integer type was specified.
- Wrong or missing "access" specifier. The "access" specifier
sometimes included the SYSCTL type, which it should not, except for
procedural SYSCTL nodes.
- Logical OR where binary OR was expected.
- Properly assert the "access" argument passed to all SYSCTL macros,
using the CTASSERT macro. This applies to both static- and dynamically
created SYSCTLs.
- Properly assert the the data type for both static and dynamic
SYSCTLs. In the case of static SYSCTLs we only assert that the data
pointed to by the SYSCTL data pointer has the correct size, hence
there is no easy way to assert types in the C language outside a
C-function.
- Rewrote some code which doesn't pass a constant "access" specifier
when creating dynamic SYSCTL nodes, which is now a requirement.
- Updated "EXAMPLES" section in SYSCTL manual page.
MFC after: 3 days
Sponsored by: Mellanox Technologies
Idle priority is not even time-share, so if system is busy in any way,
those events may never be executed. Since in some cases system waits
for events processed by that thread, that may cause deadlocks.
have implemented the PIM_NOSCAN rescan functionality will have it
enabled.
This is a no-op for head.
Reviewed by: slm
Sponsored by: Spectra Logic Corporation
MFC after: 3 days
TLR is necessary for reliable communication with SAS tape drives.
This was broken by change 246713 in the mps(4) driver. It changed the
cm_data field for SCSI I/O requests to point to the CCB instead of the data
buffer. So, instead, look at the CCB's data pointer to determine whether
or not we're talking to a tape drive.
Also, take the residual into account to make sure that we don't go off the
end of the request.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
mprsas_SSU_to_SATA_devices().
This fixes an assertion on shutdown with INVARIANTS enabled with SATA
drives present on an IR firmware controller.
Reviewed by: Steve McConnell <stephen.mcconnell@avagotech.com>.
MFC after: 3 days
This problem only occurs on versions of FreeBSD prior to the recent CAM
locking changes. (i.e. stable/9 and older versions of stable/10) This
change should be a no-op for head and stable/10.
If a path isn't specified, xpt_register_async() will create a fully
wildcarded path and acquire a lock (the XPT lock in older versions,
and via xpt_path_lock() in newer versions) to call xpt_action() for the
XPT_SASYNC_CB CCB. It will then drop the lock and if the requested event
includes AC_FOUND_DEVICE or AC_PATH_REGISTERED, it will get the caller up
to date with any device arrivals or path registrations.
The issue is that before the locking changes, each SIM lock would get
acquired in turn during the EDT tree traversal process. If a path is
specified for xpt_register_async(), it won't acquire and drop its own lock,
but instead expects the caller to hold its own SIM lock. That works for
the first part of xpt_register_async(), but causes a recursive lock
acquisition once the EDT traversal happens and it comes to the SIM in
question. And it isn't possible to call xpt_action() without holding a SIM
lock.
The locking changes fix this by using the XPT topology lock for EDT
traversal, so it is no longer an issue to hold the SIM lock while calling
xpt_register_async().
The solution for FreeBSD versions before the locking changes is to request
notification of all device arrivals (so we pass a NULL path into
xpt_register_async()) and then filter out the arrivals that are not ours.
MFC After: 3 days
Sponsored by: Spectra Logic Corporation
reflect when unmapped I/O support was added.
For FreeBSD 10, it arrived just prior to __FreeBSD_version 1000028.
For FreeBSD 9, it arrived just prior to __FreeBSD_version 902001.
Also, fix compiler warnings in mprsas_send_smpcmd() that happen in the
i386 PAE build for non-unmapped I/O builds. These were fixed in mps(4)
in revision 241145, but didn't make it into the mpr(4) driver. This
change should only affect FreeBSD versions outside the above revisions,
and thus doesn't affect head.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
This is derived from the mps(4) driver, but it supports only the 12Gb
IT and IR hardware including the SAS 3004, SAS 3008 and SAS 3108.
Some notes about this driver:
o The 12Gb hardware can do "FastPath" I/O, and that capability is included in
this driver.
o WarpDrive functionality has been removed, since it isn't supported in
the 12Gb driver interface.
o The Scatter/Gather list handling code is significantly different between
the 6Gb and 12Gb hardware. The 12Gb boards support IEEE Scatter/Gather
lists.
Thanks to LSI for developing and testing this driver for FreeBSD.
share/man/man4/mpr.4:
mpr(4) man page.
sys/dev/mpr/*:
mpr(4) driver files.
sys/modules/Makefile,
sys/modules/mpr/Makefile:
Add a module Makefile for the mpr(4) driver.
sys/conf/files:
Add the mpr(4) driver.
sys/amd64/conf/GENERIC,
sys/i386/conf/GENERIC,
sys/mips/conf/OCTEON1,
sys/sparc64/conf/GENERIC:
Add the mpr(4) driver to all config files that currently
have the mps(4) driver.
sys/ia64/conf/GENERIC:
Add the mps(4) and mpr(4) drivers to the ia64 GENERIC
config file.
sys/i386/conf/XEN:
Exclude the mpr module from building here.
Submitted by: Steve McConnell <Stephen.McConnell@lsi.com>
MFC after: 3 days
Tested by: Chris Reeves <chrisr@spectralogic.com>
Sponsored by: LSI, Spectra Logic
Relnotes: LSI 12Gb SAS driver mpr(4) added
