1.\" Copyright (c) 2006 Scott Long 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd March 13, 2019 28.Dt MFI 4 29.Os 30.Sh NAME 31.Nm mfi 32.Nd "LSI MegaRAID SAS driver" 33.Sh SYNOPSIS 34To compile this driver into the kernel, 35place the following lines in your 36kernel configuration file: 37.Bd -ragged -offset indent 38.Cd "device pci" 39.Cd "device mfi" 40.Ed 41.Pp 42Alternatively, to load the driver as a 43module at boot time, place the following line in 44.Xr loader.conf 5 : 45.Bd -literal -offset indent 46mfi_load="YES" 47.Ed 48.Sh DESCRIPTION 49This driver is for LSI's next generation PCI Express SAS RAID controllers. 50Access to RAID arrays (logical disks) from this driver is provided via 51.Pa /dev/mfid? 52device nodes. 53A simple management interface is also provided on a per-controller basis via 54the 55.Pa /dev/mfi? 56device node. 57.Pp 58The 59.Nm 60name is derived from the phrase "MegaRAID Firmware Interface", which is 61substantially different than the old "MegaRAID" interface and thus requires 62a new driver. 63Older SCSI and SATA MegaRAID cards are supported by 64.Xr amr 4 65and will not work with this driver. 66.Pp 67Two sysctls are provided to tune the 68.Nm 69driver's behavior when a request is made to remove a mounted volume. 70By default the driver will disallow any requests to remove a mounted volume. 71If the sysctl 72.Va dev.mfi.%d.delete_busy_volumes 73is set to 1, 74then the driver will allow mounted volumes to be removed. 75.Pp 76A tunable is provided to adjust the 77.Nm 78driver's behaviour when attaching to a card. 79By default the driver will attach to all known cards with high probe priority. 80If the tunable 81.Va hw.mfi.mrsas_enable 82is set to 1, 83then the driver will reduce its probe priority to allow 84.Cd mrsas 85to attach to the card instead of 86.Nm . 87.Pp 88.Nm 89does not provide ATA TRIM support. 90Refer to 91.Cd mrsas 92if TRIM support is required. 93.Sh HARDWARE 94The 95.Nm 96driver supports the following hardware: 97.Pp 98.Bl -bullet -compact 99.It 100LSI MegaRAID SAS 1078 101.It 102LSI MegaRAID SAS 8408E 103.It 104LSI MegaRAID SAS 8480E 105.It 106LSI MegaRAID SAS 9240 107.It 108LSI MegaRAID SAS 9260 109.It 110Dell PERC5 111.It 112Dell PERC6 113.It 114IBM ServeRAID M1015 SAS/SATA 115.It 116IBM ServeRAID M1115 SAS/SATA 117.It 118IBM ServeRAID M5015 SAS/SATA 119.It 120IBM ServeRAID M5110 SAS/SATA 121.It 122IBM ServeRAID-MR10i 123.It 124Intel RAID Controller SRCSAS18E 125.It 126Intel RAID Controller SROMBSAS18E 127.El 128.Sh FILES 129.Bl -tag -width ".Pa /dev/mfid?" -compact 130.It Pa /dev/mfid? 131array/logical disk interface 132.It Pa /dev/mfi? 133management interface 134.El 135.Sh DIAGNOSTICS 136.Bl -diag 137.It "mfid%d: Unable to delete busy device" 138An attempt was made to remove a mounted volume. 139.El 140.Sh SEE ALSO 141.Xr amr 4 , 142.Xr pci 4 , 143.Xr mfiutil 8 144.Sh HISTORY 145The 146.Nm 147driver first appeared in 148.Fx 6.1 . 149.Sh AUTHORS 150The 151.Nm 152driver and this manual page were written by 153.An Scott Long Aq Mt scottl@FreeBSD.org . 154.Sh BUGS 155The driver does not support big-endian architectures at this time. 156