From: Christoph Hellwig <hch@infradead.org>
To: Ezequiel Garcia <ezequiel@collabora.com>
Cc: linux-media@vger.kernel.org, linux-usb@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Tomasz Figa <tfiga@chromium.org>,
"Matwey V . Kornilov" <matwey@sai.msu.ru>,
Alan Stern <stern@rowland.harvard.edu>,
kernel@collabora.com, Keiichi Watanabe <keiichiw@chromium.org>
Subject: Re: [RFC 2/3] USB: core: Add non-coherent buffer allocation helpers
Date: Thu, 30 Aug 2018 10:58:50 -0700 [thread overview]
Message-ID: <20180830175850.GA11521@infradead.org> (raw)
In-Reply-To: <20180830172030.23344-3-ezequiel@collabora.com>
Please don't introduce new DMA_ATTR_NON_CONSISTENT users, it is
a rather horrible interface, and I plan to kill it off rather sooner
than later. I plan to post some patches for a better interface
that can reuse the normal dma_sync_single_* interfaces for ownership
transfers. I can happily include usb in that initial patch set based
on your work here if that helps.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Ezequiel Garcia <ezequiel@collabora.com>
Cc: linux-media@vger.kernel.org, linux-usb@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Tomasz Figa <tfiga@chromium.org>,
"Matwey V . Kornilov" <matwey@sai.msu.ru>,
Alan Stern <stern@rowland.harvard.edu>,
kernel@collabora.com, Keiichi Watanabe <keiichiw@chromium.org>
Subject: [RFC,2/3] USB: core: Add non-coherent buffer allocation helpers
Date: Thu, 30 Aug 2018 10:58:50 -0700 [thread overview]
Message-ID: <20180830175850.GA11521@infradead.org> (raw)
Please don't introduce new DMA_ATTR_NON_CONSISTENT users, it is
a rather horrible interface, and I plan to kill it off rather sooner
than later. I plan to post some patches for a better interface
that can reuse the normal dma_sync_single_* interfaces for ownership
transfers. I can happily include usb in that initial patch set based
on your work here if that helps.
WARNING: multiple messages have this Message-ID (diff)
From: hch@infradead.org (Christoph Hellwig)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 2/3] USB: core: Add non-coherent buffer allocation helpers
Date: Thu, 30 Aug 2018 10:58:50 -0700 [thread overview]
Message-ID: <20180830175850.GA11521@infradead.org> (raw)
In-Reply-To: <20180830172030.23344-3-ezequiel@collabora.com>
Please don't introduce new DMA_ATTR_NON_CONSISTENT users, it is
a rather horrible interface, and I plan to kill it off rather sooner
than later. I plan to post some patches for a better interface
that can reuse the normal dma_sync_single_* interfaces for ownership
transfers. I can happily include usb in that initial patch set based
on your work here if that helps.
next prev parent reply other threads:[~2018-08-30 17:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 17:20 [RFC 0/3] Introduce usb_{alloc,free}_noncoherent API Ezequiel Garcia
2018-08-30 17:20 ` Ezequiel Garcia
2018-08-30 17:20 ` [RFC 1/3] HACK: ARM: dma-mapping: Get writeback memory for non-consistent mappings Ezequiel Garcia
2018-08-30 17:20 ` Ezequiel Garcia
2018-08-30 17:20 ` [RFC,1/3] " Ezequiel Garcia
2018-08-30 17:20 ` [RFC 2/3] USB: core: Add non-coherent buffer allocation helpers Ezequiel Garcia
2018-08-30 17:20 ` Ezequiel Garcia
2018-08-30 17:20 ` [RFC,2/3] " Ezequiel Garcia
2018-08-30 17:58 ` Christoph Hellwig [this message]
2018-08-30 17:58 ` [RFC 2/3] " Christoph Hellwig
2018-08-30 17:58 ` [RFC,2/3] " Christoph Hellwig
2018-08-30 22:11 ` [RFC 2/3] " Ezequiel Garcia
2018-08-30 22:11 ` Ezequiel Garcia
2018-08-30 22:11 ` [RFC,2/3] " Ezequiel Garcia
2018-08-31 5:50 ` [RFC 2/3] " Christoph Hellwig
2018-08-31 5:50 ` Christoph Hellwig
2018-08-31 5:50 ` [RFC,2/3] " Christoph Hellwig
2018-08-31 6:51 ` [RFC 2/3] " Tomasz Figa
2018-08-31 6:51 ` Tomasz Figa
2018-08-31 6:51 ` [RFC,2/3] " Tomasz Figa
2018-10-31 1:55 ` [RFC 2/3] " Tomasz Figa
2018-10-31 1:55 ` Tomasz Figa
2018-10-31 1:55 ` [RFC,2/3] " Tomasz Figa
2018-08-30 17:20 ` [RFC 3/3] stk1160: Use non-coherent buffers for USB transfers Ezequiel Garcia
2018-08-30 17:20 ` Ezequiel Garcia
2018-08-30 17:20 ` [RFC,3/3] " Ezequiel Garcia
2018-08-30 17:59 ` [RFC 3/3] " Christoph Hellwig
2018-08-30 17:59 ` Christoph Hellwig
2018-08-30 17:59 ` [RFC,3/3] " Christoph Hellwig
2018-09-07 8:54 ` [RFC 3/3] " Tomasz Figa
2018-09-07 8:54 ` Tomasz Figa
2018-09-07 8:54 ` [RFC,3/3] " Tomasz Figa
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