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From: Carlo Pisani <carlojpisani@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: C3600, sata controller
Date: Fri, 17 May 2019 20:25:47 +0200
Message-ID: <CA+QBN9ALLJLmcszQ3Xfhv3UQzgHh11Y3mffJhOG=G7qseMtR7A@mail.gmail.com> (raw)
In-Reply-To: <9e67ee59-4e13-40be-6c1d-2b3409127515@bell.net>

> > Random failure could happen because of missing calls to DMA syncs in the driver.

we have tested several drivers and cards, these show the same behavior
-a- Highpoint RocketRAID 1640 HTP374 (PCI)
-b- HighPoint RocketRAID 2224Marvell MV88SX6081 (PCI-X)
-c- SYBA-SY-PCX40009Silicon Image Sil3124 (PCI-X)

I don't know about the HTP374 because it hasn't yet been tested on our
PowerMac-G4, but about other cards:
- they perfectly work on the PowerMacG4 MDD
- they perfectly work on our x86-box (intel core duo)
- they randomly fail in the same way on the C3600

this might mean something. I Don't know.

Anyway, even the I/O performance is not good on our C3600: none of the
above move more than 20Mbyte/sec, while the internal SCSI moves
60Mbyte/sec.

So I wonder if there is something really really wrong with the DMA:
it's too slow!

  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
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 [this message]
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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