1 .\" Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
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33 .Nd Marvell Serial ATA Host Controller driver
35 To compile this driver into the kernel,
36 place the following lines in your
37 kernel configuration file:
38 .Bd -ragged -offset indent
44 Alternatively, to load the driver as a
45 module at boot time, place the following line in
47 .Bd -literal -offset indent
51 The following tunables are settable from the
54 .It Va hint.mvs. Ns Ar X Ns Va .msi
55 controls Message Signaled Interrupts (MSI) usage by the specified controller.
56 .It Va hint.mvs. Ns Ar X Ns Va .ccc
57 controls Command Completion Coalescing (CCC) usage by the specified controller.
58 Non-zero value enables CCC and defines maximum time (in us), request can wait
60 CCC reduces number of context switches on systems with many parallel requests,
61 but it can decrease disk performance on some workloads due to additional
63 .It Va hint.mvs. Ns Ar X Ns Va .cccc
64 defines number of completed commands for CCC, which trigger interrupt without
65 waiting for specified coalescing timeout.
66 .It Va hint.mvs. Ns Ar X Ns Va .pm_level
67 controls SATA interface Power Management for the specified channel,
68 allowing some power to be saved at the cost of additional command
73 interface Power Management is disabled (default);
75 device is allowed to initiate PM state change, host is passive;
77 driver initiates PARTIAL PM state transition 1ms after port becomes idle;
79 driver initiates SLUMBER PM state transition 125ms after port becomes idle.
82 Note that interface Power Management is not compatible with
83 device presence detection.
84 A manual bus reset is needed on device hot-plug.
85 .It Va hint.mvs. Ns Ar X Ns Va .sata_rev
86 setting to nonzero value limits maximum SATA revision (speed).
87 Values 1, 2 and 3 are respectively 1.5, 3 and 6Gbps.
90 This driver provides the
92 subsystem with native access to the
94 ports of several generations (Gen-I/II/IIe) of Marvell SATA controllers.
95 Each SATA port found is represented to CAM as a separate bus with one
96 target, or, if HBA supports Port Multipliers (Gen-II/IIe), 16 targets.
97 Most of the bus-management details are handled by the SATA-specific
99 Connected ATA disks are handled by the ATA protocol disk peripheral driver
101 ATAPI devices are handled by the SCSI protocol peripheral drivers
107 Driver features include support for Serial ATA and ATAPI devices,
108 Port Multipliers (including FIS-based switching, when supported),
109 hardware command queues (up to 31 command per port),
110 Native Command Queuing, SATA interface Power Management, device hot-plug
111 and Message Signaled Interrupts.
113 Same hardware is also supported by atamarvell and ataadaptec drivers from
116 If both drivers are loaded at the same time, this one will be
117 given precedence as the more functional of the two.
121 driver supports the following controllers:
123 .It Gen-I (SATA 1.5Gbps):
134 .It Gen-II (SATA 3Gbps, NCQ, PMP):
139 88SX6041 (including Adaptec 1420SA)
145 .It Gen-IIe (SATA 3Gbps, NCQ, PMP with FBS):
150 88SX7042 (including Adaptec 1430SA)
159 Note, that this hardware supports command queueing and FIS-based switching
160 only for ATA DMA commands. ATAPI and non-DMA ATA commands executed one by one
173 driver first appeared in
176 .An Alexander Motin Aq mav@FreeBSD.org .