From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Bjorn Helgaas <bhelgaas@google.com>,
Lior Amsalem <alior@marvell.com>, Andrew Lunn <andrew@lunn.ch>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Jason Cooper <jason@lakedaemon.net>,
Stephen Warren <swarren@wwwdotorg.org>,
linux-pci@vger.kernel.org,
Thierry Reding <thierry.reding@avionic-design.de>,
Eran Ben-Avi <benavi@marvell.com>,
Nadav Haklai <nadavh@marvell.com>,
Maen Suleiman <maen@marvell.com>,
Shadi Ammouri <shadi@marvell.com>,
Gregory Clement <gregory.clement@free-electrons.com>,
Tawfik Bayouk <tawfik@marvell.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: Giving special alignment/size constraints to the Linux PCI core?
Date: Wed, 13 Feb 2013 20:51:39 +0100 [thread overview]
Message-ID: <20130213205139.77c01873@skate> (raw)
In-Reply-To: <20130213191204.GA15710@obsidianresearch.com>
Dear Jason Gunthorpe,
On Wed, 13 Feb 2013 12:12:04 -0700, Jason Gunthorpe wrote:
> Thomas, what were your test results on your 10 slot system? Did all 10
> P2P bridges appear in lspci? Was there any address space reservation
> for hot plug?
My test system "only" has 6 PCIe slots, so I couldn't test with the
entire 10 possible PCIe interfaces. But 6 PCIe slots is still a good
number :-)
If you look at the cover letter of the PATCHv3, you'll see the output
of lspci -vvv. It shows that I create one PCI-to-PCI bridge for each
PCIe interface, regardless of whether the link is here or not. And for
those where there is nothing behind the bridge, no address space
reservation occurs, so I am not allocating address decoding windows for
those unused PCIe interfaces.
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2013-02-13 19:51 UTC|newest]
Thread overview: 217+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-28 18:56 [PATCH v2] PCIe support for the Armada 370 and Armada XP SoCs Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 01/27] of/pci: Provide support for parsing PCI DT ranges property Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 02/27] of/pci: Add of_pci_get_devfn() function Thomas Petazzoni
2013-01-28 22:00 ` Stephen Warren
2013-01-28 22:16 ` Thierry Reding
2013-01-29 10:04 ` Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 03/27] of/pci: Add of_pci_parse_bus_range() function Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 04/27] ARM: pci: Allow passing per-controller private data Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 05/27] arm: pci: add a align_resource hook Thomas Petazzoni
2013-01-29 15:12 ` Thomas Petazzoni
2013-01-29 15:15 ` Russell King - ARM Linux
2013-01-29 15:23 ` Thomas Petazzoni
2013-01-29 15:25 ` Russell King - ARM Linux
2013-01-29 15:28 ` Thomas Petazzoni
2013-01-29 15:58 ` Russell King - ARM Linux
2013-01-29 16:20 ` Thomas Petazzoni
2013-01-29 16:45 ` Arnd Bergmann
2013-01-29 17:09 ` Thomas Petazzoni
2013-01-29 20:15 ` Arnd Bergmann
2013-01-29 20:33 ` Thomas Petazzoni
2013-01-29 21:59 ` Thomas Petazzoni
2013-01-29 22:17 ` Stephen Warren
2013-01-30 4:49 ` Jason Gunthorpe
2013-01-29 22:54 ` Arnd Bergmann
2013-01-30 4:21 ` Jason Gunthorpe
2013-01-30 9:55 ` Arnd Bergmann
2013-01-30 11:47 ` Thomas Petazzoni
2013-01-30 16:17 ` Arnd Bergmann
2013-01-30 16:38 ` Thomas Petazzoni
2013-01-30 20:48 ` Bjorn Helgaas
2013-01-30 21:06 ` Jason Gunthorpe
2013-01-30 4:56 ` Jason Gunthorpe
2013-01-30 8:19 ` Thomas Petazzoni
2013-01-30 9:46 ` Arnd Bergmann
2013-01-30 9:54 ` Thomas Petazzoni
2013-01-30 10:03 ` Arnd Bergmann
2013-01-30 11:42 ` Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 06/27] lib: devres: don't enclose pcim_*() functions in CONFIG_HAS_IOPORT Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 07/27] PCI: Add software-emulated host bridge Thomas Petazzoni
2013-01-28 20:18 ` Arnd Bergmann
2013-01-28 22:03 ` Stephen Warren
2013-01-28 22:09 ` Jason Gunthorpe
2013-01-28 22:18 ` Thomas Petazzoni
2013-01-28 22:23 ` Jason Gunthorpe
2013-01-28 22:30 ` Thomas Petazzoni
2013-01-28 22:51 ` Jason Gunthorpe
2013-01-29 10:01 ` Thomas Petazzoni
2013-01-29 17:42 ` Jason Gunthorpe
2013-01-29 17:43 ` Thomas Petazzoni
2013-01-29 2:40 ` Bjorn Helgaas
2013-01-29 6:16 ` Jason Gunthorpe
2013-01-28 22:09 ` Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 08/27] pci: implement an emulated PCI-to-PCI bridge Thomas Petazzoni
2013-01-28 19:35 ` Jason Gunthorpe
2013-01-28 19:39 ` Thomas Petazzoni
2013-01-28 19:55 ` Jason Gunthorpe
2013-01-28 22:06 ` Stephen Warren
2013-01-28 22:16 ` Jason Gunthorpe
2013-01-29 22:35 ` Bjorn Helgaas
2013-01-29 23:06 ` Arnd Bergmann
2013-01-30 4:12 ` Jason Gunthorpe
2013-01-28 18:56 ` [PATCH v2 09/27] pci: infrastructure to add drivers in drivers/pci/host Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 10/27] arm: mvebu: fix address-cells in mpic DT node Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 11/27] clk: mvebu: create parent-child relation for PCIe clocks on Armada 370 Thomas Petazzoni
2013-01-28 22:08 ` Stephen Warren
2013-01-28 22:21 ` Thomas Petazzoni
2013-01-28 22:27 ` Stephen Warren
2013-01-28 22:44 ` Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 12/27] clk: mvebu: add more PCIe clocks for Armada XP Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 13/27] arm: plat-orion: introduce WIN_CTRL_ENABLE in address mapping code Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 14/27] arm: plat-orion: refactor the orion_disable_wins() function Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 15/27] arm: plat-orion: introduce orion_{alloc,free}_cpu_win() functions Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 16/27] arm: mvebu: add functions to alloc/free PCIe decoding windows Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 17/27] arm: plat-orion: make common PCIe code usable on mvebu Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 18/27] arm: plat-orion: add more flexible PCI configuration space read/write functions Thomas Petazzoni
2013-01-28 19:51 ` Jason Gunthorpe
2013-01-29 8:40 ` Thomas Petazzoni
2013-01-29 17:40 ` Jason Gunthorpe
2013-01-28 18:56 ` [PATCH v2 19/27] pci: PCIe driver for Marvell Armada 370/XP systems Thomas Petazzoni
2013-01-28 22:21 ` Stephen Warren
2013-01-29 8:41 ` Thomas Petazzoni
2013-01-29 9:20 ` Thierry Reding
2013-01-29 9:21 ` Thomas Petazzoni
2013-02-07 10:24 ` Thomas Petazzoni
2013-02-07 15:46 ` Bjorn Helgaas
2013-02-07 16:00 ` Thomas Petazzoni
2013-02-07 18:08 ` Bjorn Helgaas
2013-02-07 18:15 ` Jason Gunthorpe
2013-02-07 18:30 ` Bjorn Helgaas
2013-02-07 18:43 ` Thierry Reding
2013-01-29 19:47 ` Stephen Warren
2013-01-29 3:29 ` Bjorn Helgaas
2013-01-29 5:55 ` Jason Gunthorpe
2013-01-29 8:00 ` Thomas Petazzoni
2013-01-29 17:47 ` Bjorn Helgaas
2013-01-29 18:14 ` Thomas Petazzoni
2013-01-29 18:41 ` Jason Gunthorpe
2013-01-29 19:07 ` Bjorn Helgaas
2013-01-29 19:18 ` Jason Gunthorpe
2013-01-29 19:38 ` Bjorn Helgaas
2013-01-29 22:27 ` Bjorn Helgaas
2013-01-30 4:24 ` Jason Gunthorpe
2013-01-30 9:35 ` Thomas Petazzoni
2013-01-30 18:52 ` Bjorn Helgaas
2013-01-30 22:28 ` Thomas Petazzoni
2013-01-30 23:10 ` Jason Gunthorpe
2013-01-30 23:48 ` Bjorn Helgaas
2013-01-31 16:04 ` Thomas Petazzoni
2013-01-31 16:30 ` Bjorn Helgaas
2013-01-31 16:33 ` Thomas Petazzoni
2013-01-31 17:03 ` Bjorn Helgaas
2013-01-31 16:42 ` Russell King - ARM Linux
2013-01-29 13:22 ` Andrew Murray
2013-01-29 13:45 ` Thomas Petazzoni
2013-01-29 14:05 ` Andrew Murray
2013-01-29 14:20 ` Thierry Reding
2013-01-29 14:29 ` Thomas Petazzoni
2013-01-29 15:02 ` Thierry Reding
2013-01-29 15:08 ` Andrew Murray
2013-01-29 15:10 ` Thomas Petazzoni
2013-02-07 14:37 ` Thomas Petazzoni
2013-02-07 15:51 ` Andrew Murray
2013-02-07 16:19 ` Thomas Petazzoni
2013-02-07 16:40 ` Thomas Petazzoni
2013-02-07 16:53 ` Andrew Murray
2013-02-07 17:14 ` Thomas Petazzoni
2013-02-07 17:29 ` Andrew Murray
2013-02-07 17:37 ` Thomas Petazzoni
2013-02-07 18:21 ` Jason Gunthorpe
2013-02-07 23:25 ` Arnd Bergmann
2013-02-08 0:44 ` Jason Gunthorpe
2013-02-09 22:23 ` Arnd Bergmann
2013-02-12 19:26 ` Jason Gunthorpe
2013-02-07 18:30 ` Andrew Murray
2013-02-07 23:27 ` Arnd Bergmann
2013-01-30 11:32 ` Russell King - ARM Linux
2013-01-30 11:37 ` Thomas Petazzoni
2013-01-30 12:03 ` Thierry Reding
2013-01-30 13:07 ` Thomas Petazzoni
2013-01-30 15:08 ` Russell King - ARM Linux
2013-01-30 15:19 ` Russell King - ARM Linux
2013-01-30 15:36 ` Thomas Petazzoni
2013-01-30 15:46 ` Russell King - ARM Linux
2013-01-31 14:30 ` Thomas Petazzoni
2013-01-31 14:50 ` Russell King - ARM Linux
2013-01-31 14:57 ` Thomas Petazzoni
2013-01-31 15:08 ` Russell King - ARM Linux
2013-01-31 15:22 ` Thomas Petazzoni
2013-01-31 15:36 ` Russell King - ARM Linux
2013-01-31 15:47 ` Thomas Petazzoni
2013-01-31 15:48 ` Russell King - ARM Linux
2013-01-31 16:18 ` Arnd Bergmann
2013-01-31 18:02 ` Jason Gunthorpe
2013-01-31 20:46 ` Arnd Bergmann
2013-01-31 22:44 ` Jason Gunthorpe
2013-02-01 11:30 ` Arnd Bergmann
2013-02-01 19:52 ` Jason Gunthorpe
2013-02-06 16:51 ` Thomas Petazzoni
2013-02-06 17:09 ` Jason Gunthorpe
2013-02-06 17:18 ` Thomas Petazzoni
2013-02-06 17:50 ` Jason Gunthorpe
2013-02-06 18:02 ` Thomas Petazzoni
2013-02-06 18:22 ` Stephen Warren
2013-02-06 18:39 ` Jason Gunthorpe
2013-02-06 18:42 ` Thomas Petazzoni
2013-02-06 22:04 ` Arnd Bergmann
2013-02-07 15:50 ` Giving special alignment/size constraints to the Linux PCI core? Thomas Petazzoni
2013-02-07 23:33 ` Arnd Bergmann
2013-02-08 4:21 ` Bjorn Helgaas
2013-02-08 8:14 ` Thomas Petazzoni
2013-02-12 16:00 ` Arnd Bergmann
2013-02-12 18:41 ` Jason Gunthorpe
2013-02-12 19:02 ` Arnd Bergmann
2013-02-12 19:38 ` Jason Gunthorpe
2013-02-12 23:05 ` Arnd Bergmann
2013-02-13 0:32 ` Jason Gunthorpe
2013-02-13 18:53 ` Arnd Bergmann
2013-02-13 19:12 ` Jason Gunthorpe
2013-02-13 19:51 ` Thomas Petazzoni [this message]
2013-02-13 21:10 ` Arnd Bergmann
2013-02-13 21:20 ` Yinghai Lu
2013-02-13 22:24 ` Arnd Bergmann
2013-02-13 21:02 ` Yinghai Lu
2013-01-31 7:10 ` [PATCH v2 19/27] pci: PCIe driver for Marvell Armada 370/XP systems Thierry Reding
2013-02-01 0:34 ` Stephen Warren
2013-02-01 1:41 ` Jason Gunthorpe
2013-02-01 2:21 ` Stephen Warren
2013-02-01 3:51 ` Jason Gunthorpe
2013-02-01 9:03 ` Thomas Petazzoni
2013-02-01 16:07 ` Arnd Bergmann
2013-02-01 16:26 ` Russell King - ARM Linux
2013-02-01 17:45 ` Arnd Bergmann
2013-02-01 19:58 ` Jason Gunthorpe
2013-02-01 8:46 ` Thomas Petazzoni
2013-02-01 16:02 ` Arnd Bergmann
2013-02-01 17:57 ` Stephen Warren
2013-02-01 19:39 ` Jason Gunthorpe
2013-02-01 20:30 ` Stephen Warren
2013-01-28 18:56 ` [PATCH v2 20/27] arm: mvebu: PCIe support is now available on mvebu Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 21/27] arm: mvebu: add PCIe Device Tree informations for Armada 370 Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 22/27] arm: mvebu: add PCIe Device Tree informations for Armada XP Thomas Petazzoni
2013-02-06 22:41 ` Arnd Bergmann
2013-02-06 23:07 ` Thomas Petazzoni
2013-02-07 8:04 ` Arnd Bergmann
2013-02-07 8:45 ` Thomas Petazzoni
2013-02-07 9:09 ` Arnd Bergmann
2013-02-07 1:05 ` Jason Gunthorpe
2013-02-07 7:28 ` Thierry Reding
2013-02-07 17:49 ` Jason Gunthorpe
2013-02-07 8:24 ` Arnd Bergmann
2013-02-07 17:00 ` Jason Gunthorpe
2013-02-07 23:44 ` Arnd Bergmann
2013-01-28 18:56 ` [PATCH v2 23/27] arm: mvebu: PCIe Device Tree informations for OpenBlocks AX3-4 Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 24/27] arm: mvebu: PCIe Device Tree informations for Armada XP DB Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 25/27] arm: mvebu: PCIe Device Tree informations for Armada 370 Mirabox Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 26/27] arm: mvebu: PCIe Device Tree informations for Armada 370 DB Thomas Petazzoni
2013-01-28 18:56 ` [PATCH v2 27/27] arm: mvebu: update defconfig with PCI and USB support Thomas Petazzoni
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