From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 24/32] pci: PCIe driver for Marvell Armada 370/XP systems
Date: Sun, 10 Mar 2013 16:06:15 +0100 [thread overview]
Message-ID: <20130310160615.14ba099c@skate> (raw)
In-Reply-To: <513C1473.60600@firmworks.com>
Dear Mitch Bradley,
On Sat, 09 Mar 2013 19:04:51 -1000, Mitch Bradley wrote:
> As stated in my recent reply to Jason, I thing the correct property is
> "ranges". "Ranges" translates mappable child address space addresses
> into parent addresses, and that is exactly what is going on. A specific
> subset of config addresses is mappable into parent MMIO space.
The PCI configuration space is *not* mapped in the MMIO space on
Marvell hardware. In the MMIO space of each PCIe interface, there are
many registers, only *two* of which are dedicated to accessing the PCI
configuration space:
* One register to set the offset in the PCI configuration space.
* One register to read or write a value in the PCI configuration, at
the offset specified in the first register.
See the implementation of mvebu_pcie_hw_rd_conf() and
mvebu_pcie_hw_wr_conf() in the driver.
So really, the values specified in the reg = <...> property are *not*
the PCI configuration spaces mapped in the MMIO space. They represent a
bunch of per PCIe interface registers used to configure them, get the
status of the link... and access, through an indirect mechanism, the
PCI configuration space.
Does this helps?
Thanks,
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:[~2013-03-10 15:06 UTC|newest]
Thread overview: 135+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 16:28 [PATCH v3] PCIe support for the Armada 370 and Armada XP SoCs Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 01/32] of/pci: Provide support for parsing PCI DT ranges property Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 02/32] of/pci: Add of_pci_get_devfn() function Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 03/32] of/pci: Add of_pci_parse_bus_range() function Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 04/32] ARM: pci: Allow passing per-controller private data Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 05/32] lib: devres: don't enclose pcim_*() functions in CONFIG_HAS_IOPORT Thomas Petazzoni
2013-02-12 18:00 ` Arnd Bergmann
2013-02-12 18:58 ` Thomas Petazzoni
2013-02-12 22:36 ` Arnd Bergmann
2013-03-04 16:28 ` Thomas Petazzoni
2013-03-04 20:30 ` Arnd Bergmann
2013-02-12 16:28 ` [PATCH 06/32] arm: pci: add a align_resource hook Thomas Petazzoni
2013-02-12 18:03 ` Arnd Bergmann
2013-02-12 19:01 ` Thomas Petazzoni
2013-02-12 19:49 ` Russell King - ARM Linux
2013-02-12 16:28 ` [PATCH 07/32] arm: mvebu: fix address-cells in mpic DT node Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 08/32] clk: mvebu: create parent-child relation for PCIe clocks on Armada 370 Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 09/32] clk: mvebu: add more PCIe clocks for Armada XP Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 10/32] arm: plat-orion: introduce WIN_CTRL_ENABLE in address mapping code Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 11/32] arm: plat-orion: refactor the orion_disable_wins() function Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 12/32] plat-orion: introduce ORION_ADDR_MAP_NO_REMAP Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 13/32] arm: mach-dove: use ORION_ADDR_MAP_NO_REMAP Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 14/32] arm: mach-kirkwood: " Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 15/32] arm: mach-mvebu: " Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 16/32] arm: mach-orion5x: " Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 17/32] arm: plat-orion: convert 'int remap' to 'u32 remap' Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 18/32] arm: plat-orion: remove __init from addr-map functions needed after boot time Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 19/32] arm: plat-orion: introduce orion_{alloc, free}_cpu_win() functions Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 20/32] arm: plat-orion: remove __init from PCIe functions needed after boot time Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 21/32] arm: mvebu: add functions to alloc/free PCIe decoding windows Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 22/32] arm: plat-orion: make common PCIe code usable on mvebu Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 23/32] pci: infrastructure to add drivers in drivers/pci/host Thomas Petazzoni
2013-02-12 16:28 ` [PATCH 24/32] pci: PCIe driver for Marvell Armada 370/XP systems Thomas Petazzoni
2013-02-12 18:30 ` Arnd Bergmann
2013-02-12 19:22 ` Thomas Petazzoni
2013-02-12 19:49 ` Jason Gunthorpe
2013-02-12 22:59 ` Arnd Bergmann
2013-02-13 0:41 ` Jason Gunthorpe
2013-02-13 9:18 ` Arnd Bergmann
2013-02-13 9:31 ` Thomas Petazzoni
2013-02-13 10:23 ` Arnd Bergmann
2013-02-13 8:23 ` Thomas Petazzoni
2013-02-13 9:29 ` Arnd Bergmann
2013-02-13 9:40 ` Thomas Petazzoni
2013-02-13 10:37 ` Arnd Bergmann
2013-03-06 9:50 ` Thomas Petazzoni
2013-03-06 10:43 ` Arnd Bergmann
2013-02-12 22:35 ` Jason Gunthorpe
2013-02-13 8:57 ` Thomas Petazzoni
2013-02-13 18:04 ` Jason Gunthorpe
2013-02-13 19:33 ` Arnd Bergmann
2013-03-06 9:54 ` Thomas Petazzoni
2013-03-06 12:11 ` Thierry Reding
2013-03-06 18:09 ` Jason Gunthorpe
2013-03-07 8:08 ` Thierry Reding
2013-03-07 17:49 ` Jason Gunthorpe
2013-03-07 19:48 ` Thierry Reding
2013-03-07 20:02 ` Jason Gunthorpe
2013-03-07 20:47 ` Thierry Reding
2013-03-08 0:05 ` Rob Herring
2013-03-08 7:14 ` Thierry Reding
2013-03-08 16:52 ` Jason Gunthorpe
2013-03-08 19:12 ` Thierry Reding
2013-03-08 19:43 ` Mitch Bradley
2013-03-08 20:02 ` Jason Gunthorpe
2013-03-08 20:13 ` Thierry Reding
2013-03-10 15:09 ` Thomas Petazzoni
2013-03-11 8:08 ` Thierry Reding
2013-03-08 23:46 ` Mitch Bradley
2013-03-09 1:31 ` Jason Gunthorpe
2013-03-10 4:52 ` Mitch Bradley
2013-03-10 6:55 ` Jason Gunthorpe
2013-03-11 5:46 ` Mitch Bradley
2013-03-11 7:46 ` Thierry Reding
2013-03-11 18:04 ` Mitch Bradley
2013-03-11 18:23 ` Jason Gunthorpe
2013-03-11 19:49 ` Mitch Bradley
2013-03-11 18:15 ` Jason Gunthorpe
2013-03-11 21:50 ` Mitch Bradley
2013-03-11 23:25 ` Jason Gunthorpe
2013-03-11 23:38 ` Mitch Bradley
2013-03-12 7:08 ` Thierry Reding
2013-03-12 15:57 ` Jason Gunthorpe
2013-03-12 20:38 ` Thierry Reding
2013-03-12 21:03 ` Jason Gunthorpe
2013-03-12 21:30 ` Thierry Reding
2013-03-12 22:08 ` Jason Gunthorpe
2013-03-12 23:25 ` Mitch Bradley
2013-03-13 8:18 ` Thierry Reding
2013-03-13 17:02 ` Jason Gunthorpe
2013-03-13 19:26 ` Thierry Reding
2013-03-13 19:59 ` Jason Gunthorpe
2013-03-13 20:54 ` Thierry Reding
2013-03-13 20:58 ` Mitch Bradley
2013-03-13 21:33 ` Thierry Reding
2013-03-13 22:48 ` Mitch Bradley
2013-03-14 0:43 ` Rob Herring
2013-03-14 1:20 ` Mitch Bradley
2013-03-14 7:11 ` Thierry Reding
2013-03-14 4:56 ` Stephen Warren
2013-03-13 22:02 ` Thierry Reding
2013-03-13 22:21 ` Jason Gunthorpe
2013-03-14 9:01 ` Thierry Reding
2013-03-14 17:25 ` Jason Gunthorpe
2013-03-14 20:38 ` Thierry Reding
2013-03-14 21:05 ` Jason Gunthorpe
2013-03-14 21:10 ` Mitch Bradley
2013-03-14 21:09 ` Thierry Reding
2013-03-14 21:29 ` Jason Gunthorpe
2013-03-14 21:37 ` Thierry Reding
2013-03-13 22:22 ` Jason Gunthorpe
2013-03-09 8:58 ` Thomas Petazzoni
2013-03-08 23:12 ` Rob Herring
2013-03-09 11:10 ` Thierry Reding
2013-03-10 5:04 ` Mitch Bradley
2013-03-10 15:06 ` Thomas Petazzoni [this message]
2013-03-10 18:33 ` Mitch Bradley
2013-02-15 0:36 ` Bjorn Helgaas
2013-02-15 5:06 ` Thomas Petazzoni
2013-02-15 16:26 ` Bjorn Helgaas
2013-02-15 16:44 ` Jason Gunthorpe
2013-02-12 16:28 ` [PATCH 25/32] arm: mvebu: PCIe support is now available on mvebu Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 26/32] arm: mvebu: add PCIe Device Tree informations for Armada 370 Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 27/32] arm: mvebu: add PCIe Device Tree informations for Armada XP Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 28/32] arm: mvebu: PCIe Device Tree informations for OpenBlocks AX3-4 Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 29/32] arm: mvebu: PCIe Device Tree informations for Armada XP DB Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 30/32] arm: mvebu: PCIe Device Tree informations for Armada 370 Mirabox Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 31/32] arm: mvebu: PCIe Device Tree informations for Armada 370 DB Thomas Petazzoni
2013-02-12 16:29 ` [PATCH 32/32] arm: mvebu: update defconfig with PCI and USB support Thomas Petazzoni
2013-02-12 18:12 ` [PATCH v3] PCIe support for the Armada 370 and Armada XP SoCs Arnd Bergmann
2013-02-12 19:04 ` Thomas Petazzoni
2013-02-13 8:50 ` Thomas Petazzoni
2013-02-13 9:37 ` Arnd Bergmann
2013-02-13 15:27 ` Christophe Vu-Brugier
2013-02-13 15:30 ` Thomas Petazzoni
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