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From: John David Anglin <dave.anglin@bell.net>
To: Carlo Pisani <carlojpisani@gmail.com>
Cc: linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: C3600, sata controller
Date: Tue, 14 May 2019 08:10:40 -0400
Message-ID: <44c01dbf-4b6c-c37d-d5cc-844e5679dea5@bell.net> (raw)
In-Reply-To: <CA+QBN9CgMRFmv+isvH-Y=FCCFwKhmD5_5s5u32xg+wk-gTLK5A@mail.gmail.com>

On 2019-05-14 4:15 a.m., Carlo Pisani wrote:
> I am surprised that a PCI-X chip isn't able to switch into PCI64 mode.
> Cards are usually declared "backward compatible", and it would be just
> a matter of "how" to handle the finite state machine that drives the
> PCI, plus the onboard PLL and synchronization.
I agree but it appears fallback requires BIOS or a QUIRK to configure card.  One would have to
look at driver and/or BIOS to see what is/can done. Maybe OpenBIOS has something.

There is ENABLE_HARDFAIL config option in lba_pci.c which determines whether HPMC occurs.
Soft fail might be useful to debug.  However, I doubt there's enough public information to configure
card given what Alan said.
>
>
>> Here are some Adaptec 64-bit cards that I found.
>> https://storage.microsemi.com/en-us/support/raid/sata/aar-2410sa/
>> https://storage.microsemi.com/en-us/support/raid/sata/aar-21610sa/
> as written here (1), we have already tested Adaptec 2410SA, and I have
> also recently received an email by AlanCox confirming that the card is
> x86-only!
>
>         Subsystem: Adaptec AAR-2410SA PCI SATA 4ch (Jaguar II)
>
> It fails on every non-x86 machine because it relies on PC-BIOS
> extension for the initialization of the onboard Intel i960 chip, and
> we do not have any Linux kernel driver able to do what the PC-BIOS
> does.
I had listed these cards because they are PCI64 and the Adaptec site didn't say Intel
architecture was required.  There was one card that claimed to be PCI-X and PCI64
(both 3.3 and 5V signalling) but it required Intel or AMD architecture.

Dave

-- 
John David Anglin  dave.anglin@bell.net


  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-01 21:45 linux-next: Signed-off-by missing for commit in the parisc-hd tree Stephen Rothwell
2019-05-02  5:48 ` Helge Deller
2019-05-12 20:44   ` C3600, sata controller Carlo Pisani
2019-05-12 20:49     ` Carlo Pisani
2019-05-12 21:10     ` John David Anglin
2019-05-12 21:15       ` Carlo Pisani
2019-05-13 23:14         ` John David Anglin
2019-05-13 23:24           ` Carlo Pisani
2019-05-13 23:47             ` Carlo Pisani
2019-05-14  1:50               ` John David Anglin
2019-05-14  8:22                 ` Carlo Pisani
     [not found]                 ` <CA+QBN9CgMRFmv+isvH-Y=FCCFwKhmD5_5s5u32xg+wk-gTLK5A@mail.gmail.com>
2019-05-14 12:10                   ` John David Anglin [this message]
2019-05-14 12:29                     ` Carlo Pisani
2019-05-14 12:57                       ` C3600, optical Fibre Channel, any card? Carlo Pisani
2019-05-14 13:01                       ` C3600, sata controller Sven Schnelle
2019-05-14 14:23                         ` John David Anglin
2019-05-17 15:43                           ` Carlo Pisani
2019-05-17 17:21                             ` Helge Deller
2019-05-17 18:05                               ` John David Anglin
2019-05-17 18:25                                 ` Carlo Pisani
2019-05-13 15:10     ` Carlo Pisani
2019-05-13 21:58       ` Carlo Pisani
2019-05-17 17:31     ` Carlo Pisani
2019-05-25  8:59     ` Carlo Pisani

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