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
dnel...@allantgroup.com
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