The following patch for megaraid_sas updates the driver version to
v06.803.01.00-rc1, and updates Documentation/scsi/ChangeLog.megaraid_sas.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The following patch for megaraid_sas adds Dell PowerEdge VRTS SR-IOV VF
support (Device ID 0x002f).

This patch has some > 80 column lines that need to be left in place
for code readability purposes.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Host lock is added back around queuecommand. Host lock removal can create race
conditon between ISR path(when RAID map update interrupt is raised) and IO
build path of driver, since IO build path is making use of RAID map, and in
case of RAID map update interrupt, old RAID map copy is memset to zero, which
some IOs may be referencing in build IO path.  Changes done for performance
boost- 1) Added code to set SMP IRQ affinity per CPU.  2) Pass MSI-x index,
while issuing sysPD IO.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

If consistent DMA mask is set to 64 bit, fall back to 32bit DMA mask and 32bit consistent DMA mask.
64bit consistent DMA mask may be set on some 64bit DMA slot, which causes DMA offset "10000000000000" and
MFI_INIT and IOCTL frames will have high memory addresses, leads to firmware FAULT.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Don't wait forever for firmware response for internal DCMDs sent from driver
firmware. Such DCMDs will be posted to firmware with timeout. Timeout is also
introduced for DCMD sent to abort the commands. DCMD sent via IOCTL path will
still be always blocking to keep the IOCTL design intact.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

When megasas_get_pd_list() fails we cannot detect any drives,
so we should be checking the return value accordingly.

[jejb: checkpatch fix]
Signed-off-by: NHannes Reinecke <hare@suse.de>
Acked-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The assumption that sizeof(long) >= sizeof(resource_size_t) can lead to
truncation of the PCI resource address, meaning this driver didn't work
on 32-bit systems with 64-bit PCI adressing ranges.
Signed-off-by: NBen Collins <ben.c@servergy.com>
Acked-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Some host adapters do not pass commands through to the target disk
directly. Instead they provide an emulated target which may or may not
accurately report its capabilities. In some cases the physical device
characteristics are reported even when the host adapter is processing
commands on the device's behalf. This can lead to adapter firmware hangs
or excessive I/O errors.

This patch disables WRITE SAME for devices connected to host adapters
that provide an emulated target. Driver writers can disable WRITE SAME
by setting the no_write_same flag in the host adapter template.

[jejb: fix up rejections due to eh_deadline patch]
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Cc: stable@kernel.org
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

There is syncronization problem between sysPD IO path and AEN path. Driver
maintains instance->pd_list[] array, which will get updated(by calling
function megasas_get_pd_list[]), whenever any of below events occurs-

MR_EVT_PD_INSERTED
MR_EVT_PD_REMOVED
MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED
MR_EVT_FOREIGN_CFG_IMPORTED

At same time running sysPD IO will be accessing the same array
instance->pd_list[], which is getting updated in AEN path, because of this IO
may not get correct PD info from instance->pd_list[] array.
Signed-off-by: NAdam Radford <adam.radford@lsi.com>
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Fixed two issues in this patch-
1) In function megasas_get_pd_list(), data read(pd_addr->deviceId) from DMAed memory is converted to CPU's endianess.
2) While register AEN, removed some endianness conversion on some fields, since their endianess is already converted.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Since commit 0998d063
(device-core: Ensure drvdata = NULL when no driver is bound),
the driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

This patch will add big endian architecture support to megaraid_sas
driver. The support added is for LSI MegaRAID all generation controllers-
(3Gb/s, 6Gb/s and 12 Gb/s controllers).

We have done basic sanity test @ppc64 arch and @x86_64. Additional
testing/observations are welcome.

[jejb: fix up rejections]
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Problem: When Hardware IOMMU is on, megaraid_sas driver initialization fails
in kdump kernel with LSI MegaRAID controller(device id-0x73).

Actually this issue needs fix in firmware, but for firmware running in field,
this driver fix is proposed to resolve the issue.  At firmware initialization
time, if firmware does not come to ready state, driver will reset the adapter
and retry for firmware transition to ready state unconditionally(not only
executed for kdump kernel).
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Cc: stable@vger.kernel.org
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

commit 98cb7e44 ([SCSI] megaraid_sas: Sanity check user
supplied length before passing it to dma_alloc_coherent())
introduced a memory leak.  Memory allocated for entries
following zero length SGL entries will not be freed.

Reference: http://bugs.debian.org/688198Signed-off-by: NBjørn Mork <bjorn@mork.no>
Cc: <stable@vger.kernel.org>
Acked-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This looks like a cut and paste typo to me. Both of the
megasas_read_fw_status_reg_* functions involved are identical though, so
there was no bad behaviour. I changed it for consistency and clarity.
Signed-off-by: NJames Georgas <soulpa7ch@gmail.com>
Acked-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Add support to differentiate between iMR(no external memory) and MR(with
external memory) controllers.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

MegaRAID older Firmware does not support uneven span configuration for PRL11.
E.g User wants to create 34 Driver PRL11 config, it was not possible using old
firmware, since it was not supported configuration in old firmware

Old Firmware expect even number of Drives in each span and same number of
physical drives at each span.  Considering above design, 17 Drives at Span-0
and 17 drives at span-1 was not possible.

Now, using this new feature Firmware and Driver both required changes.  New
Firmware can allow user to create 16 Drives at span-0 and 18 Drives at
span-1. This will allow user to create 34 Drives Uneven span PRL11.

RAID map is interface between Driver and FW to fetch all required
fields(attributes) for each Virtual Drives.  Since legacy RAID map consider
Even Span design, there was no place to keep Uneven span information in
existing Raid map.  Because of this limitation, for Uneven span VD, driver can
not use RAID map.

This patch address the changes required in Driver to support Uneven span PRL11
support.

1. Driver will find if Firmware has UnevenSpanSupport or not by reading
   Controller Info.
2. If Firmware has UnvenSpan PRL11 support, then Driver will inform about its
   capability of handling UnevenSpan PRL11 to the firmware.
3. Driver will update its copy of span info on each time Raid map update is
   called.
4. Follow different IO path if it is Uneven Span. (For Uneven Span, Driver
   uses Span Set info to find relavent fields for that particular Virtual
   Disk)

More verbose prints will be available by setting "SPAN_DEBUG" to 1 at
compilation time.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This Driver will use more than 8 MSI-x support provided by Invader/Fury max
upto 128 MSI-x.

[jejb: fix checkpatch warning]
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Free event detail memory from more common place, instead of doing it for
limited device types.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Do not return SCSI_MLQUEUE_HOST_BUSY, but send DID_ERROR to SCSI mid-layer, if
adapter is in critical error state.  "SCSI_MLQUEUE_HOST_BUSY" will keep same
SCSI command in loop and it is not a right return value, if controller is
hardware critical error.
Signed-off-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

We should unlock here before returning.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Previously we used PCI_MSI_FLAGS to locate a register in the MSI-X
capability.  This did work because the MSI and MSI-X flags happen
to be at the same offsets, but was confusing.

PCI_MSIX_FLAGS_ENABLE is already defined in include/uapi/linux/pci_regs.h,
so no need to define it again.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NAdam Radford <aradford@gmail.com>

This patch updates the megaraid_sas driver version and updates
Documentation/scsi/ChangeLog.megaraid_sas.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Adam Radford <linuxraid@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

megaraid use INIT_WORK to declare a hotplug_work, but cast the
hotplug_work from work_struct to delayed_work and
schedule_delayed_work on it.  This is very dangerous, as other part of
delayed_work might be kernel memories allocated by others.

With commit 8852aac2 ("workqueue: mod_delayed_work_on() shouldn't queue
timer on 0 delay"), schedule_delayed_work() will check dwork->timer
before queue_work even when @delay is 0, this causes megaraid code to
hit the BUG_ON() in workqueue code.  Change megaraid code to use
delayed work.
Signed-off-by: NXiaotian Feng <dannyfeng@tencent.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Neela Syam Kolli <megaraidlinux@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-scsi@vger.kernel.org

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This allows a user to adjust the wait time in seconds after I/O timeout before
resetting the adapter.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This allows a user to adjust the queue depth of the adapter when throttled due
to I/O timeout.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The following patch moves the poll_aen_lock initializer from
megasas_probe_one() to megasas_init().  This prevents a crash when a user
loads the driver and tries to issue a poll() system call on the ioctl
interface with no adapters present.
Signed-off-by: NKashyap Desai <Kashyap.Desai@lsi.com>
Signed-off-by: NAdam Radford <aradford@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The following patch for megaraid_sas updates the driver version to
v00.00.06.15-rc1, and updates Documentation/scsi/ChangeLog.megaraid_sas.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

This code has never worked correctly, doesn't disable interrupts when
set as a module parameter, doesn't disable interrupts when set after
driver load time in sysfs node, etc.
Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>