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.
WARNING: multiple messages have this Message-ID (diff)
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 19:05:58 +0000 [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.
next prev parent reply other threads:[~2015-04-03 19:06 UTC|newest]
Thread overview: 104+ 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 ` Yinghai Lu
2015-04-01 2:57 ` [PATCH 1/3] PCI: Introduce pci_bus_addr_t Yinghai Lu
2015-04-01 2:57 ` Yinghai Lu
2015-04-03 18:59 ` Bjorn Helgaas
2015-04-03 18:59 ` Bjorn Helgaas
2015-04-03 19:05 ` David Miller [this message]
2015-04-03 19:05 ` David Miller
2015-04-04 3:40 ` Yinghai Lu
2015-04-04 3:40 ` Yinghai Lu
2015-04-03 19:32 ` Bjorn Helgaas
2015-04-03 19:32 ` Bjorn Helgaas
2015-04-03 20:52 ` Bjorn Helgaas
2015-04-03 20:52 ` Bjorn Helgaas
2015-04-03 20:52 ` Bjorn Helgaas
2015-04-03 20:52 ` Bjorn Helgaas
2015-04-04 3:34 ` Yinghai Lu
2015-04-04 3:34 ` Yinghai Lu
2015-04-04 3:34 ` Yinghai Lu
2015-04-04 3:34 ` Yinghai Lu
2015-04-04 3:34 ` Yinghai Lu
2015-04-04 12:46 ` Bjorn Helgaas
2015-04-04 12:46 ` Bjorn Helgaas
2015-04-04 12:46 ` Bjorn Helgaas
2015-04-04 12:46 ` Bjorn Helgaas
2015-04-04 12:46 ` Bjorn Helgaas
2015-04-04 19:48 ` Rob Herring
2015-04-04 19:48 ` Rob Herring
2015-04-04 19:48 ` Rob Herring
2015-04-04 19:48 ` Rob Herring
2015-04-04 19:48 ` Rob Herring
2015-04-05 3:25 ` Bjorn Helgaas
2015-04-05 3:25 ` Bjorn Helgaas
2015-04-05 3:25 ` Bjorn Helgaas
2015-04-05 3:25 ` Bjorn Helgaas
2015-04-05 3:25 ` Bjorn Helgaas
2015-04-06 13:05 ` Rob Herring
2015-04-06 13:05 ` Rob Herring
2015-04-06 13:05 ` Rob Herring
2015-04-06 13:05 ` Rob Herring
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
2015-04-01 2:57 ` Yinghai Lu
2015-04-03 20:46 ` Bjorn Helgaas
2015-04-03 20:46 ` Bjorn Helgaas
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
2015-04-01 2:57 ` Yinghai Lu
2015-04-06 22:06 ` Bjorn Helgaas
2015-04-06 22:06 ` Bjorn Helgaas
2015-04-06 22:35 ` Yinghai Lu
2015-04-06 22:35 ` Yinghai Lu
2015-04-06 22:49 ` Bjorn Helgaas
2015-04-06 22:49 ` Bjorn Helgaas
2015-04-07 1:13 ` Yinghai Lu
2015-04-07 1:13 ` Yinghai Lu
2015-04-07 3:43 ` Bjorn Helgaas
2015-04-07 3:43 ` Bjorn Helgaas
2015-04-07 5:23 ` Yinghai Lu
2015-04-07 5:23 ` Yinghai Lu
2015-04-07 12:18 ` Bjorn Helgaas
2015-04-07 12:18 ` Bjorn Helgaas
2015-04-07 0:35 ` David Miller
2015-04-07 0:35 ` David Miller
2015-04-07 16:48 ` Bjorn Helgaas
2015-04-07 16:48 ` Bjorn Helgaas
2015-04-08 15:47 ` Bjorn Helgaas
2015-04-08 15:47 ` Bjorn Helgaas
2015-04-08 16:08 ` David Miller
2015-04-08 16:08 ` David Miller
2015-04-08 21:12 ` Benjamin Herrenschmidt
2015-04-08 21:12 ` Benjamin Herrenschmidt
2015-04-09 0:06 ` Yinghai Lu
2015-04-09 0:06 ` Yinghai Lu
2015-04-09 3:17 ` Benjamin Herrenschmidt
2015-04-09 3:17 ` Benjamin Herrenschmidt
2015-04-09 4:11 ` Yinghai Lu
2015-04-09 4:11 ` Yinghai Lu
2015-04-09 8:56 ` Benjamin Herrenschmidt
2015-04-09 8:56 ` Benjamin Herrenschmidt
2015-04-09 4:26 ` Bjorn Helgaas
2015-04-09 4:26 ` Bjorn Helgaas
2015-04-09 8:54 ` Benjamin Herrenschmidt
2015-04-09 8:54 ` Benjamin Herrenschmidt
2015-04-09 18:31 ` Yinghai Lu
2015-04-09 18:31 ` Yinghai Lu
2015-04-09 23:31 ` Benjamin Herrenschmidt
2015-04-09 23:31 ` Benjamin Herrenschmidt
2015-04-10 4:13 ` Yinghai Lu
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 20:37 ` David Miller
2015-04-02 22:07 ` Yinghai Lu
2015-04-02 22:07 ` Yinghai Lu
2015-04-02 22:13 ` Bjorn Helgaas
2015-04-02 22:13 ` Bjorn Helgaas
2015-04-03 0:42 ` David Miller
2015-04-03 0:42 ` David Miller
2015-05-16 15:25 ` Bjorn Helgaas
2015-05-16 15:25 ` Bjorn Helgaas
2015-05-16 15:28 ` Bjorn Helgaas
2015-05-16 15:28 ` Bjorn Helgaas
2015-05-27 23:27 ` Yinghai Lu
2015-05-27 23:27 ` Yinghai Lu
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