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From: David Miller <davem@davemloft.net>
To: bhelgaas@google.com
Cc: yinghai@kernel.org, david.ahern@oracle.com,
	linux-pci@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH 1/3] PCI: Introduce pci_bus_addr_t
Date: Fri, 03 Apr 2015 15:05:58 -0400 (EDT)	[thread overview]
Message-ID: <20150403.150558.188543237134528987.davem@davemloft.net> (raw)
In-Reply-To: <20150403185939.GC10892@google.com>

From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 3 Apr 2015 13:59:39 -0500

> On Tue, Mar 31, 2015 at 07:57:47PM -0700, Yinghai Lu wrote:
>> David Ahern found commit d63e2e1f3df9 ("sparc/PCI: Clip bridge windows
>> to fit in upstream windows") broke booting on sparc/T5-8.
>> 
>> In the boot log, there is
>>   pci 0000:06:00.0: reg 0x184: can't handle BAR above 4GB (bus address
>>   0x110204000)
>> but that only could happen when dma_addr_t is 32-bit.
>> 
>> According to David Miller, all DMA occurs behind an IOMMU and these
>> IOMMUs only support 32-bit addressing, therefore dma_addr_t is
>> 32-bit on sparc64.
>> 
>> Let's introduce pci_bus_addr_t instead of using dma_addr_t,
>> and pci_bus_addr_t will be 64-bit on 64-bit platform or X86_PAE.
> 
> I propose the following doc updates (I can just fold them into this patch
> if you approve):

No objection.

  reply	other threads:[~2015-04-03 19:06 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-01  2:57 [PATCH 0/3] PCI/sparc: Fix booting with T5-8 Yinghai Lu
2015-04-01  2:57 ` [PATCH 1/3] PCI: Introduce pci_bus_addr_t Yinghai Lu
2015-04-03 18:59   ` Bjorn Helgaas
2015-04-03 19:05     ` David Miller [this message]
2015-04-04  3:40     ` Yinghai Lu
2015-04-03 19:32   ` Bjorn Helgaas
2015-04-03 20:52     ` Bjorn Helgaas
2015-04-04  3:34       ` Yinghai Lu
2015-04-04 12:46         ` Bjorn Helgaas
2015-04-04 19:48           ` Rob Herring
2015-04-05  3:25             ` Bjorn Helgaas
2015-04-06 13:05               ` Rob Herring
2015-04-01  2:57 ` [PATCH 2/3] sparc/PCI: Add mem64 resource parsing for root bus Yinghai Lu
2015-04-03 20:46   ` Bjorn Helgaas
2015-04-01  2:57 ` [PATCH 3/3] PCI: Set pref for mem64 resource of pcie device Yinghai Lu
2015-04-06 22:06   ` Bjorn Helgaas
2015-04-06 22:35     ` Yinghai Lu
2015-04-06 22:49       ` Bjorn Helgaas
2015-04-07  1:13         ` Yinghai Lu
2015-04-07  3:43           ` Bjorn Helgaas
2015-04-07  5:23             ` Yinghai Lu
2015-04-07 12:18               ` Bjorn Helgaas
2015-04-07  0:35     ` David Miller
2015-04-07 16:48       ` Bjorn Helgaas
2015-04-08 15:47         ` Bjorn Helgaas
2015-04-08 16:08           ` David Miller
2015-04-08 21:12           ` Benjamin Herrenschmidt
2015-04-09  0:06             ` Yinghai Lu
2015-04-09  3:17               ` Benjamin Herrenschmidt
2015-04-09  4:11                 ` Yinghai Lu
2015-04-09  8:56                   ` Benjamin Herrenschmidt
2015-04-09  4:26                 ` Bjorn Helgaas
2015-04-09  8:54                   ` Benjamin Herrenschmidt
2015-04-09 18:31                     ` Yinghai Lu
2015-04-09 23:31                       ` Benjamin Herrenschmidt
2015-04-10  4:13                         ` Yinghai Lu
2015-04-02 20:37 ` [PATCH 0/3] PCI/sparc: Fix booting with T5-8 David Miller
2015-04-02 22:07   ` Yinghai Lu
2015-04-02 22:13     ` Bjorn Helgaas
2015-04-03  0:42     ` David Miller
2015-05-16 15:25 ` Bjorn Helgaas
2015-05-16 15:28   ` Bjorn Helgaas
2015-05-27 23:27     ` Yinghai Lu

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