src-test/sys/dev/mvs/mvs.h, branch main

Make MAXPHYS tunable. Bump MAXPHYS to 1M.

2020-11-28T12:12:51Z

Replace MAXPHYS by runtime variable maxphys. It is initialized from MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys. Make b_pages[] array in struct buf flexible. Size b_pages[] for buffer cache buffers exactly to atop(maxbcachebuf) (currently it is sized to atop(MAXPHYS)), and b_pages[] for pbufs is sized to atop(maxphys) + 1. The +1 for pbufs allow several pbuf consumers, among them vmapbuf(), to use unaligned buffers still sized to maxphys, esp. when such buffers come from userspace (*). Overall, we save significant amount of otherwise wasted memory in b_pages[] for buffer cache buffers, while bumping MAXPHYS to desired high value. Eliminate all direct uses of the MAXPHYS constant in kernel and driver sources, except a place which initialize maxphys. Some random (and arguably weird) uses of MAXPHYS, e.g. in linuxolator, are converted straight. Some drivers, which use MAXPHYS to size embeded structures, get private MAXPHYS-like constant; their convertion is out of scope for this work. Changes to cam/, dev/ahci, dev/ata, dev/mpr, dev/mpt, dev/mvs, dev/siis, where either submitted by, or based on changes by mav. Suggested by: mav (*) Reviewed by: imp, mav, imp, mckusick, scottl (intermediate versions) Tested by: pho Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D27225

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

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.

sys/dev: minor spelling fixes.

2016-05-03T03:41:25Z

Most affect comments, very few have user-visible effects.

Fix SATA Gen3 speed constants.

2015-03-13T20:08:35Z

MFC after: 1 week

Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this

2013-11-30T22:17:27Z

shifts into the sign bit. Instead use (1U << 31) which gets the expected result. This fix is not ideal as it assumes a 32 bit int, but does fix the issue for most cases. A similar change was made in OpenBSD. Discussed with: -arch, rdivacky Reviewed by: cperciva

- Limit r214102 workaround to only x86. On arm it causes more problems

2012-06-12T11:08:51Z

then solves because of cache coherency issues. This fixes periodic error messages on console and command timeouts. - Patch SATA PHY configuration for 65nm SoCs to improve SNR same as Linux does. MFC after: 2 weeks

Adjust mvs(4) to handle interrupt cause reg depending on the actual number of

2012-02-01T13:39:52Z

channels available - current code treats bits 4:7 in 'SATAHC interrupt mask' and 'SATAHC interrupt cause' as flags for SATA channels 2 and 3 - for embedded SATA controllers (SoC) these bits have been marked as reserved in datasheets so far, but for some new and upcoming chips they are used for purposes other than SATA Submitted by: Lukasz Plachno Reviewed by: mav Obtained from: Semihalf MFC after: 2 weeks

Fix some English grammar.

2011-04-19T10:57:40Z

Refactor hard-reset implementation in mvs(4).

2011-04-14T07:49:45Z

Instead of spinning in a tight loop for up to 15 seconds, polling for device readiness while it spins up, return reset completion just after PHY reports "connect well" or 100ms connection timeout. If device was found, use callout for checking device readiness with 100ms period up to full 31 second timeout. This fixes system freeze for 5-10 seconds on drives hot plug-in.

Implement automatic SCSI sense fetching for mvs(4).

2011-04-12T16:01:27Z

Make few improvements/changes to ATAPI PIO support to pass most of scgcheck (cdrtools) tests.