BMC/Intel-BMC/linux.git/arch/tile/kernel/pci_gx.c, branch dev

PCI: Assign resources before drivers claim devices (pci_scan_root_bus())

2015-03-19T15:17:13+00:00

Previously, pci_scan_root_bus() created a root PCI bus, enumerated the devices on it, and called pci_bus_add_devices(), which made the devices available for drivers to claim them. Most callers assigned resources to devices after pci_scan_root_bus() returns, which may be after drivers have claimed the devices. This is incorrect; the PCI core should not change device resources while a driver is managing the device. Remove pci_bus_add_devices() from pci_scan_root_bus() and do it after any resource assignment in the callers. Note that ARM's pci_common_init_dev() already called pci_bus_add_devices() after pci_scan_root_bus(), so we only need to remove the first call: pci_common_init_dev pcibios_init_hw pci_scan_root_bus pci_bus_add_devices # first call pci_bus_assign_resources pci_bus_add_devices # second call [bhelgaas: changelog, drop "root_bus" var in alpha common_init_pci(), return failure earlier in mn10300, add "return" in x86 pcibios_scan_root(), return early if xtensa platform_pcibios_fixup() fails] Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas CC: Richard Henderson CC: Ivan Kokshaysky CC: Matt Turner CC: David Howells CC: Tony Luck CC: Michal Simek CC: Ralf Baechle CC: Koichi Yasutake CC: Sebastian Ott CC: "David S. Miller" CC: Chris Metcalf CC: Chris Zankel CC: Max Filippov CC: Thomas Gleixner

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2014-12-16T21:54:16+00:00

Pull arch/tile updates from Chris Metcalf: "Note that one of the changes converts my old cmetcalf@tilera.com email in MAINTAINERS to the cmetcalf@ezchip.com email that you see on this email" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: arch/tile: update MAINTAINERS email to EZchip tile: avoid undefined behavior with regs[TREG_TP] etc arch: tile: kernel: kgdb.c: Use memcpy() instead of pointer copy one by one tile: Use the more common pr_warn instead of pr_warning arch: tile: gxio: Export symbols for module using in 'mpipe.c' arch: tile: kernel: signal.c: Use __copy_from/to_user() instead of __get/put_user()

PCI/MSI: Rename mask/unmask_msi_irq treewide

2014-11-23T12:01:45+00:00

The PCI/MSI irq chip callbacks mask/unmask_msi_irq have been renamed to pci_msi_mask/unmask_irq to mark them PCI specific. Rename all usage sites. The conversion helper functions are kept around to avoid conflicts in next and will be removed after merging into mainline. Coccinelle assisted conversion. No functional change. Signed-off-by: Thomas Gleixner Cc: Bjorn Helgaas Cc: Russell King Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Heiko Carstens Cc: "David S. Miller" Cc: Chris Metcalf Cc: x86@kernel.org Cc: Jiang Liu Cc: Jason Cooper Cc: Murali Karicheri Cc: Thierry Reding Cc: Mohit Kumar Cc: Simon Horman Cc: Michal Simek Cc: Yijing Wang

PCI/MSI: Rename write_msi_msg() to pci_write_msi_msg()

2014-11-23T12:01:45+00:00

Rename write_msi_msg() to pci_write_msi_msg() to mark it as PCI specific. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner

tile: Use the more common pr_warn instead of pr_warning

2014-11-11T20:51:42+00:00

And other message logging neatening. Other miscellanea: o coalesce formats o realign arguments o standardize a couple of macros o use __func__ instead of embedding the function name Signed-off-by: Joe Perches Signed-off-by: Chris Metcalf

tile: pci: Use irq_alloc/free_hwirq()

2014-05-16T12:05:21+00:00

No functional change. Just convert to the new interface. Signed-off-by: Thomas Gleixner Reviewed-by: Grant Likely Cc: Tony Luck Cc: Peter Zijlstra Acked-by: Chris Metcalf Link: http://lkml.kernel.org/r/20140507154338.132662495@linutronix.de Signed-off-by: Thomas Gleixner

tile PCI RC: Use default pcibios_enable_device()

2014-03-19T21:00:15+00:00

We don't need anything arch-specific in pcibios_enable_device(), so drop the arch implementation and use the default generic one. Note: pci_enable_resources() checks that r->parent is non-NULL, which basically checks that pci_claim_resource() or request_resource() has been called for each BAR. I don't see where that happens for tile, but this patch doesn't change that behavior, so if it worked before, it should still work. Signed-off-by: Bjorn Helgaas Acked-by: Chris Metcalf

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2013-09-06T18:14:33+00:00

Pull Tile arch updates from Chris Metcalf: "These changes bring in a bunch of new functionality that has been maintained internally at Tilera over the last year, plus other stray bits of work that I've taken into the tile tree from other folks. The changes include some PCI root complex work, interrupt-driven console support, support for performing fast-path unaligned data fixups by kernel-based JIT code generation, CONFIG_PREEMPT support, vDSO support for gettimeofday(), a serial driver for the tilegx on-chip UART, KGDB support, more optimized string routines, support for ftrace and kprobes, improved ASLR, and many bug fixes. We also remove support for the old TILE64 chip, which is no longer buildable" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: (85 commits) tile: refresh tile defconfig files tile: rework tile PCI RC: make default consistent DMA mask 32-bit tile: add null check for kzalloc in tile/kernel/setup.c tile: make __write_once a synonym for __read_mostly tile: remove support for TILE64 tile: use asm-generic/bitops/builtin-*.h tile: eliminate no-op "noatomichash" boot argument tile: use standard tile_bundle_bits type in traps.c tile: simplify code referencing hypervisor API addresses tile: change to in comments tile: mark pcibios_init() as __init tile: check for correct compiler earlier in asm-offsets.c tile: use standard 'generic-y' model for tile: use asm-generic version of tile PCI RC: add comment about "PCI hole" problem tile: remove DEBUG_EXTRA_FLAGS kernel config option tile: add virt_to_kpte() API and clean up and document behavior tile: support FRAME_POINTER tile: support reporting Tilera hypervisor statistics ...

tile PCI RC: make default consistent DMA mask 32-bit

2013-09-03T18:53:37+00:00

This change sets the PCI devices' initial DMA capabilities conservatively and promotes them at the request of the driver, as opposed to assuming advanced DMA capabilities. The old design runs the risk of breaking drivers that assume default capabilities. Signed-off-by: Chris Metcalf

tile: mark pcibios_init() as __init

2013-09-03T18:53:15+00:00

It was bombed away because it was previously marked as __devinit, but it should be an __init function. Signed-off-by: Chris Metcalf