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From: "Michael Büsch" <m@bues.ch>
To: b43-dev@lists.infradead.org
Subject: [PATCH 1/3] b43: replace DMA translation workarounds with just a one, commented
Date: Thu, 21 Jul 2011 23:22:25 +0200	[thread overview]
Message-ID: <20110721232225.1b0e1f15@maggie> (raw)
In-Reply-To: <20110721193440.2baeaae3@Nokia-N900>

On Thu, 21 Jul 2011 19:34:40 +0000
Michael B?sch <m@bues.ch> wrote:
> For historical reasons there is unused 64bit dma code in b43legacy. I'm not sure whether it would even work. Probably not. Larry's fixes were most likely not ported over.

So I looked closer at the code now.
The b43legacy 64bit DMA code certainly is dead, unused and broken code.
One could remove it, if someone really cares (I don't).

However, there is another issue.
b43legacy calls ssb_dma_translation() (also on 30/32bit code) for every descriptor.
As our ssb patch adds a SSB register read to ssb_dma_translation(), this adds an unacceptable
amount of overhead. This needs to be addressed before merging the ssb patch.

  reply	other threads:[~2011-07-21 21:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-19 22:12 [PATCH 0/3] b43 & bcma: DMA special (translation) bits Rafał Miłecki
2011-07-19 22:12 ` [PATCH 1/3] b43: replace DMA translation workarounds with just a one, commented Rafał Miłecki
2011-07-19 22:53   ` Larry Finger
2011-07-19 23:15   ` Michael Büsch
2011-07-20  6:16     ` Rafał Miłecki
2011-07-20  8:30       ` Larry Finger
2011-07-20  8:55       ` Michael Büsch
2011-07-20 11:10         ` Rafał Miłecki
2011-07-20 15:35           ` Michael Büsch
     [not found]             ` <4E28422C.60209@gnu.org>
2011-07-21 15:33               ` Rafał Miłecki
2011-07-21 19:34                 ` Michael Büsch
2011-07-21 21:22                   ` Michael Büsch [this message]
2011-07-21 21:31                     ` Rafał Miłecki
2011-07-21 21:40                       ` Michael Büsch
2011-07-21 21:49                         ` Larry Finger
     [not found]                   ` <4E2A7B59.80106@gnu.org>
2011-07-23  8:21                     ` Michael Büsch
2011-07-19 22:12 ` [PATCH 2/3] bcma: inform drivers about translation bits needed for the core Rafał Miłecki
2011-07-19 22:12 ` [PATCH 3/3] b43: bcma: get DMA translation bits Rafał Miłecki

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