This device cannot cross a 4GB boundary with DMA. Removing the
boundary in r346386 resulted in low frequency memory corruption on
machines with isci(4) controllers.
Submitted by: gallatin@
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D20910
isci(4) uses deferred loading. Typically on amd64 and i386 non-PAE
the tag does not create any restrictions, but on i386 PAE-tables but
non-PAE configs callbacks might be used.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
BIOS always enables PCI busmaster on the isci device, which effectively
worked around this omission. But when passing the isci device through
to a guest VM, the hypervisor will disable busmaster and isci will not
work without calling pci_enable_busmaster().
MFC after: 3 days
Sponsored by: Intel
While here, change ISCI_LED to ISCI_PHY since conceptually the hardware
ties the LEDs to a phy and the LEDs for a given phy cannot be controlled
independently.
Submitted by: Paul Maulberger <Paul.Maulberger at gmx.de> (with modifications)
Device nodes are in the format /dev/led/isci.busX.portY.locate.
Sponsored by: Intel
Requested by: Paul Maulberger <paul dot maulberger at gmx dot de>
MFC after: 1 week
This addresses kernel panic observed when sending SCSI UNMAP
commands to SATA disks attached to isci(4).
1) Flesh out callback routines to allocate/free buffers needed for
translating SCSI UNMAP data to ATA DSM data.
2) Add controller-level pool for storing buffers previously allocated
for UNMAP translation, to lessen chance of no buffer available
under memory pressure.
3) Ensure driver properly handles case where buffer pool is empty
and contigmalloc returns NULL.
Sponsored by: Intel
Reported by: Maksim Yevmenkin <max at netflix dot com>
Discussed with: scottl
MFC after: 3 days
The isci driver is for the integrated SAS controller in the Intel C600
(Patsburg) chipset. Source files in sys/dev/isci directory are
FreeBSD-specific, and sys/dev/isci/scil subdirectory contains
an OS-agnostic library (SCIL) published by Intel to control the SAS
controller. This library is used primarily as-is in this driver, with
some post-processing to better integrate into the kernel build
environment.
isci.4 and a README in the sys/dev/isci directory contain a few
additional details.
This driver is only built for amd64 and i386 targets.
Sponsored by: Intel
Reviewed by: scottl
Approved by: scottl
