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From: Carlo Pisani <carlojpisani@gmail.com>
To: John David Anglin <dave.anglin@bell.net>
Cc: Parisc List <linux-parisc@vger.kernel.org>
Subject: Re: C3600, sata controller
Date: Tue, 14 May 2019 01:24:47 +0200	[thread overview]
Message-ID: <CA+QBN9BkXRp2hCd4ADXtWOisHz1Fa0JvWo-0iR56ZTDZiaG=Yg@mail.gmail.com> (raw)
In-Reply-To: <66bf0e79-16a4-a411-19ba-cd7d5a232976@bell.net>

> The issue is probably the signalling voltage and clock rate capability.

PCI_X means 64bit, no matter voltage of anything.
You can have PCI_X at 33Mhz, 66Mhz, 100Mhz
You can have PCI_X at 5V, or PCI_X at 3.3V

> TTL logic, it is likely that 3.3V CMOS logic can't provide the high level for 5V TTL logic.

inputs are 5V tolerant, outputs are already ok about their levels

> I suspect the only slot that might work with a PCI-X card is the 3.3V SL2.

the SIL24 PCI_X card has been already checked in that slot, and it
fails in the same way as it fails when it's plugged in one of the 5V
slots

> However, if you see I/O errors in the PIM dump following an HPMC, then it's not compatible.

if things were that way, it wouldn't be a random failure, but rather
an immediate failure

to me, it looks more like a timing error, or something bad with DMA 64bit

it's like to force the card to be "DMA32bit" only, just to check it

  reply	other threads:[~2019-05-13 23:25 UTC|newest]

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 [this message]
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
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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