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From: Michael Ellerman <mpe@ellerman.id.au>
To: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	mikey@neuling.org, stewart@linux.vnet.ibm.com,
	apopple@au1.ibm.com, hbabu@us.ibm.com, oohall@gmail.com,
	linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 07/12] powerpc/vas: Define vas_win_paste_addr()
Date: Fri, 25 Aug 2017 19:36:57 +1000	[thread overview]
Message-ID: <8760dcugxy.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1503556688-15412-8-git-send-email-sukadev@linux.vnet.ibm.com>

Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> writes:

> Define an interface that the NX drivers can use to find the physical
> paste address of a send window. This interface is expected to be used
> with the mmap() operation of the NX driver's device. i.e the user space
> process can use driver's mmap() operation to map the send window's paste
> address into their address space and then use copy and paste instructions
> to submit the CRBs to the NX engine.
>
> Note that kernel drivers will use vas_paste_crb() directly and don't need
> this interface.

AFAICS this is not used. And if it was that would be a problem because
there are implications in letting userspace do paste, so can you drop
this from the series for now.

cheers

  reply	other threads:[~2017-08-25  9:37 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-24  6:37 [PATCH v7 00/12] Enable VAS Sukadev Bhattiprolu
2017-08-24  6:37 ` [PATCH v7 01/12] powerpc/vas: Define macros, register fields and structures Sukadev Bhattiprolu
2017-08-25  9:47   ` Michael Ellerman
2017-08-24  6:37 ` [PATCH v7 02/12] Move GET_FIELD/SET_FIELD to vas.h Sukadev Bhattiprolu
2017-08-24  6:37 ` [PATCH v7 03/12] powerpc/vas: Define vas_init() and vas_exit() Sukadev Bhattiprolu
2017-08-24 11:51   ` Michael Ellerman
2017-08-24 21:43     ` Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 04/12] powerpc/vas: Define helpers to access MMIO regions Sukadev Bhattiprolu
2017-08-25  3:38   ` Michael Ellerman
2017-08-28  4:36     ` Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 05/12] powerpc/vas: Define helpers to init window context Sukadev Bhattiprolu
2017-08-25  9:25   ` Michael Ellerman
2017-08-28  4:44     ` Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 06/12] powerpc/vas: Define helpers to alloc/free windows Sukadev Bhattiprolu
2017-08-25  9:35   ` Michael Ellerman
2017-08-28  4:52     ` Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 07/12] powerpc/vas: Define vas_win_paste_addr() Sukadev Bhattiprolu
2017-08-25  9:36   ` Michael Ellerman [this message]
2017-08-24  6:38 ` [PATCH v7 08/12] powerpc/vas: Define vas_win_id() Sukadev Bhattiprolu
2017-08-25  9:37   ` Michael Ellerman
2017-08-28  4:53     ` Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 09/12] powerpc/vas: Define vas_rx_win_open() interface Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 10/12] powerpc/vas: Define vas_win_close() interface Sukadev Bhattiprolu
2017-08-25 10:02   ` Michael Ellerman
2017-08-28  5:14     ` Sukadev Bhattiprolu
2017-08-28 11:43       ` Michael Ellerman
2017-08-24  6:38 ` [PATCH v7 11/12] powerpc/vas: Define vas_tx_win_open() Sukadev Bhattiprolu
2017-08-24  6:38 ` [PATCH v7 12/12] powerpc/vas: Define copy/paste interfaces Sukadev Bhattiprolu
2017-08-25 10:56   ` Michael Ellerman
2017-08-28  5:20     ` Sukadev Bhattiprolu
2017-08-28 11:45       ` Michael Ellerman

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