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.Dd April 19, 2023 26.Dt MFI 4 27.Os 28.Sh NAME 29.Nm mfi 30.Nd "LSI MegaRAID SAS driver" 31.Sh SYNOPSIS 32To compile this driver into the kernel, 33place the following lines in your 34kernel configuration file: 35.Bd -ragged -offset indent 36.Cd "device pci" 37.Cd "device mfi" 38.Ed 39.Pp 40Alternatively, to load the driver as a 41module at boot time, place the following line in 42.Xr loader.conf 5 : 43.Bd -literal -offset indent 44mfi_load="YES" 45.Ed 46.Sh DESCRIPTION 47This driver is for LSI's next generation PCI Express SAS RAID controllers. 48Access to RAID arrays (logical disks) from this driver is provided via 49.Pa /dev/mfid? 50device nodes. 51A simple management interface is also provided on a per-controller basis via 52the 53.Pa /dev/mfi? 54device node. 55.Pp 56The 57.Nm 58name is derived from the phrase "MegaRAID Firmware Interface", which is 59substantially different than the old "MegaRAID" interface and thus requires 60a new driver. 61Older SCSI and SATA MegaRAID cards are supported by 62.Xr amr 4 63and will not work with this driver. 64.Pp 65Two sysctls are provided to tune the 66.Nm 67driver's behavior when a request is made to remove a mounted volume. 68By default the driver will disallow any requests to remove a mounted volume. 69If the sysctl 70.Va dev.mfi.%d.delete_busy_volumes 71is set to 1, 72then the driver will allow mounted volumes to be removed. 73.Pp 74A tunable is provided to adjust the 75.Nm 76driver's behaviour when attaching to a card. 77By default the driver will attach to all known cards with high probe priority. 78If the tunable 79.Va hw.mfi.mrsas_enable 80is set to 1, 81then the driver will reduce its probe priority to allow 82.Xr mrsas 4 83to attach to the card instead of 84.Nm . 85.Pp 86.Nm 87does not provide ATA TRIM support. 88Refer to 89.Xr mrsas 4 90if TRIM support is required. 91.Sh HARDWARE 92The 93.Nm 94driver supports the following hardware: 95.Pp 96.Bl -bullet -compact 97.It 98LSI MegaRAID SAS 1078 99.It 100LSI MegaRAID SAS 8408E 101.It 102LSI MegaRAID SAS 8480E 103.It 104LSI MegaRAID SAS 9240 105.It 106LSI MegaRAID SAS 9260 107.It 108Dell PERC5 109.It 110Dell PERC6 111.It 112IBM ServeRAID M1015 SAS/SATA 113.It 114IBM ServeRAID M1115 SAS/SATA 115.It 116IBM ServeRAID M5015 SAS/SATA 117.It 118IBM ServeRAID M5110 SAS/SATA 119.It 120IBM ServeRAID-MR10i 121.It 122Intel RAID Controller SRCSAS18E 123.It 124Intel RAID Controller SROMBSAS18E 125.El 126.Sh FILES 127.Bl -tag -width ".Pa /dev/mfid?" -compact 128.It Pa /dev/mfid? 129array/logical disk interface 130.It Pa /dev/mfi? 131management interface 132.El 133.Sh DIAGNOSTICS 134.Bl -diag 135.It "mfid%d: Unable to delete busy device" 136An attempt was made to remove a mounted volume. 137.El 138.Sh SEE ALSO 139.Xr amr 4 , 140.Xr pci 4 , 141.Xr mfiutil 8 142.Sh HISTORY 143The 144.Nm 145driver first appeared in 146.Fx 6.1 . 147.Sh AUTHORS 148The 149.Nm 150driver and this manual page were written by 151.An Scott Long Aq Mt scottl@FreeBSD.org . 152.Sh BUGS 153The driver does not support big-endian architectures at this time. 154