Date: Wed, 23 Mar 2011 16:37:11 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Anton Yuzhaninov <citrin@citrin.ru> Cc: freebsd-questions@freebsd.org Subject: Re: how to enable NCQ on Intel ESB2 AHCI SATA controller/ST31000340NS Message-ID: <20110323213711.GH44561@dan.emsphone.com> In-Reply-To: <im9tec$3a8$1@dough.gmane.org> References: <im9tec$3a8$1@dough.gmane.org>
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In the last episode (Mar 22), Anton Yuzhaninov said: > How to enable NCQ on this controller: > ahci0@pci0:0:31:2: class=0x010601 card=0x808015d9 chip=0x26818086 rev=0x09 hdr=0x00 > vendor = 'Intel Corporation' > device = 'LSI LOGIC, 62089A2, LSISAS1068 B0, T 0620, WE 119200.1 (62089A2)' > class = mass storage > subclass = SATA > bar [10] = type I/O Port, range 32, base 0x18a0, size 8, enabled > bar [14] = type I/O Port, range 32, base 0x1874, size 4, enabled > bar [18] = type I/O Port, range 32, base 0x1878, size 8, enabled > bar [1c] = type I/O Port, range 32, base 0x1870, size 4, enabled > bar [20] = type I/O Port, range 32, base 0x1880, size 32, enabled > bar [24] = type Memory, range 32, base 0xd8700400, size 1024, enabled > cap 01[70] = powerspec 2 supports D0 D3 current D0 > cap 12[a8] = SATA Index-Data Pair > > dmesg: > ahci0: <Intel ESB2 AHCI SATA controller> port 0x18a0-0x18a7,0x1874-0x1877,0x1878-0x187f,0x1870-0x1873,0x1880-0x189f mem 0xd8700400-0xd87007ff irq 19 at device 31.2 on pci0 > ahci0: [ITHREAD] > ahci0: AHCI v1.10 with 6 3Gbps ports, Port Multiplier supported If you do a verbose boot, you should get a couple more lines printed: ahci0: Caps: 64bit NCQ SNTF AL CLO 3Gbps PM PMD SSC PSC 32cmd CCC EM 6ports ahci0: Caps2: ahci0: EM Caps: ALHD XMT SMB LED If you see NCQ in your Caps line, then queueing should be supported by the controller. Looking at the ahci.c source, there is a quirk "AHCI_Q_NONCQ" that disables NCQ, but it it only used for VIA VT8251 chips. -- Dan Nelson dnelson@allantgroup.com
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