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-<table class="head">
- <tr>
- <td class="head-ltitle">MVS(4)</td>
- <td class="head-vol">Device Drivers Manual</td>
- <td class="head-rtitle">MVS(4)</td>
- </tr>
-</table>
-<div class="manual-text">
-<section class="Sh">
-<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
-<p class="Pp"><code class="Nm">mvs</code> &#x2014; <span class="Nd">Marvell
- Serial ATA Host Controller driver</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp">To compile this driver into the kernel, place the following lines
- in your kernel configuration file:</p>
-<div class="Bd Pp Bd-indent"><code class="Cd">device pci</code>
-<br/>
-<code class="Cd">device scbus</code>
-<br/>
-<code class="Cd">device mvs</code></div>
-<p class="Pp">Alternatively, to load the driver as a module at boot time, place
- the following line in <a class="Xr">loader.conf(5)</a>:</p>
-<div class="Bd Pp Bd-indent Li">
-<pre>mvs_load=&quot;YES&quot;</pre>
-</div>
-<p class="Pp">The following tunables are settable from the
- <a class="Xr">loader(8)</a>:</p>
-<dl class="Bl-ohang">
- <dt id="hint.mvs."><var class="Va">hint.mvs.</var><var class="Ar">X</var><var class="Va">.msi</var></dt>
- <dd>controls Message Signaled Interrupts (MSI) usage by the specified
- controller.</dd>
- <dt id="hint.mvs.~2"><var class="Va">hint.mvs.</var><var class="Ar">X</var><var class="Va">.ccc</var></dt>
- <dd>controls Command Completion Coalescing (CCC) usage by the specified
- controller. Non-zero value enables CCC and defines maximum time (in us),
- request can wait for interrupt. CCC reduces number of context switches on
- systems with many parallel requests, but it can decrease disk performance
- on some workloads due to additional command latency.</dd>
- <dt id="hint.mvs.~3"><var class="Va">hint.mvs.</var><var class="Ar">X</var><var class="Va">.cccc</var></dt>
- <dd>defines number of completed commands for CCC, which trigger interrupt
- without waiting for specified coalescing timeout.</dd>
- <dt id="hint.mvsch."><var class="Va">hint.mvsch.</var><var class="Ar">X</var><var class="Va">.pm_level</var></dt>
- <dd>controls SATA interface Power Management for the specified channel,
- allowing some power to be saved at the cost of additional command latency.
- Possible values:
- <p class="Pp"></p>
- <div class="Bd-indent">
- <dl class="Bl-tag Bl-compact">
- <dt>0</dt>
- <dd>interface Power Management is disabled (default);</dd>
- <dt>1</dt>
- <dd>device is allowed to initiate PM state change, host is passive;</dd>
- <dt>4</dt>
- <dd>driver initiates PARTIAL PM state transition 1ms after port becomes
- idle;</dd>
- <dt>5</dt>
- <dd>driver initiates SLUMBER PM state transition 125ms after port becomes
- idle.</dd>
- </dl>
- </div>
- <p class="Pp">Note that interface Power Management is not compatible with
- device presence detection. A manual bus reset is needed on device
- hot-plug.</p>
- </dd>
- <dt id="hint.mvsch.~2"><var class="Va">hint.mvsch.</var><var class="Ar">X</var><var class="Va">.sata_rev</var></dt>
- <dd>setting to nonzero value limits maximum SATA revision (speed). Values 1, 2
- and 3 are respectively 1.5, 3 and 6Gbps.</dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">This driver provides the <a class="Xr">CAM(4)</a> subsystem with
- native access to the SATA ports of several generations (Gen-I/II/IIe) of
- Marvell SATA controllers. Each SATA port found is represented to CAM as a
- separate bus with one target, or, if HBA supports Port Multipliers
- (Gen-II/IIe), 16 targets. Most of the bus-management details are handled by
- the SATA-specific transport of CAM. Connected ATA disks are handled by the
- ATA protocol disk peripheral driver <a class="Xr">ada(4)</a>. ATAPI devices
- are handled by the SCSI protocol peripheral drivers <a class="Xr">cd(4)</a>,
- <a class="Xr">da(4)</a>, <a class="Xr">sa(4)</a>, etc.</p>
-<p class="Pp">Driver features include support for Serial ATA and ATAPI devices,
- Port Multipliers (including FIS-based switching, when supported), hardware
- command queues (up to 31 command per port), Native Command Queuing, SATA
- interface Power Management, device hot-plug and Message Signaled
- Interrupts.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HARDWARE"><a class="permalink" href="#HARDWARE">HARDWARE</a></h1>
-<p class="Pp">The <code class="Nm">mvs</code> driver supports the following
- controllers:</p>
-<p class="Pp">Gen-I (SATA 1.5Gbps):</p>
-<ul class="Bl-bullet Bd-indent Bl-compact">
- <li>88SX5040</li>
- <li>88SX5041</li>
- <li>88SX5080</li>
- <li>88SX5081</li>
-</ul>
-<p class="Pp">Gen-II (SATA 3Gbps, NCQ, PMP):</p>
-<ul class="Bl-bullet Bd-indent Bl-compact">
- <li>88SX6040</li>
- <li>88SX6041 (including Adaptec 1420SA)</li>
- <li>88SX6080</li>
- <li>88SX6081</li>
-</ul>
-<p class="Pp">Gen-IIe (SATA 3Gbps, NCQ, PMP with FBS):</p>
-<ul class="Bl-bullet Bd-indent Bl-compact">
- <li>88SX6042</li>
- <li>88SX7042 (including Adaptec 1430SA)</li>
- <li>88F5182 SoC</li>
- <li>88F6281 SoC</li>
- <li>MV78100 SoC</li>
-</ul>
-<p class="Pp">Note, that this hardware supports command queueing and FIS-based
- switching only for ATA DMA commands. ATAPI and non-DMA ATA commands executed
- one by one for each port.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
- ALSO</a></h1>
-<p class="Pp"><a class="Xr">ada(4)</a>, <a class="Xr">ata(4)</a>,
- <a class="Xr">cam(4)</a>, <a class="Xr">cd(4)</a>, <a class="Xr">da(4)</a>,
- <a class="Xr">sa(4)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
-<p class="Pp">The <code class="Nm">mvs</code> driver first appeared in
- <span class="Ux">FreeBSD 8.1</span>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
-<p class="Pp"><span class="An">Alexander Motin</span>
- &lt;<a class="Mt" href="mailto:mav@FreeBSD.org">mav@FreeBSD.org</a>&gt;</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">March 23, 2015</td>
- <td class="foot-os">FreeBSD 15.0</td>
- </tr>
-</table>