user/sven/linux.git/include/linux/msi.h, branch v3.10.106

PCI: Remove "extern" from function declarations

2013-04-23T15:50:30Z

We had an inconsistent mix of using and omitting the "extern" keyword on function declarations in header files. This removes them all. Signed-off-by: Bjorn Helgaas

PCI/sysfs: add per pci device msi[x] irq listing (v5)

2011-12-05T18:21:44Z

This patch adds a per-pci-device subdirectory in sysfs called: /sys/bus/pci/devices//msi_irqs This sub-directory exports the set of msi vectors allocated by a given pci device, by creating a numbered sub-directory for each vector beneath msi_irqs. For each vector various attributes can be exported. Currently the only attribute is called mode, which tracks the operational mode of that vector (msi vs. msix) Acked-by: Greg Kroah-Hartman Signed-off-by: Jesse Barnes

pci: Cleanup the irq_desc mess in msi

2010-10-12T14:53:34Z

Handing down irq_desc to msi just so that msi can access irq_desc.irq_data.msi_desc is a pretty stupid idea. The calling code can hand down a pointer to msi_desc so msi code does not need to know about the irq descriptor at all. Signed-off-by: Thomas Gleixner Reviewed-by: Ingo Molnar Acked-by: Jesse Barnes

pci: Convert msi to new irq_chip functions

2010-10-12T14:53:34Z

Signed-off-by: Thomas Gleixner Reviewed-by: Ingo Molnar Acked-by: Jesse Barnes Cc: Benjamin Herrenschmidt Cc: "David S. Miller" Cc: Tony Luck Cc: Russell King

PCI: MSI: Restore read_msi_msg_desc(); add get_cached_msi_msg_desc()

2010-07-30T16:41:39Z

commit 2ca1af9aa3285c6a5f103ed31ad09f7399fc65d7 "PCI: MSI: Remove unsafe and unnecessary hardware access" changed read_msi_msg_desc() to return the last MSI message written instead of reading it from the device, since it may be called while the device is in a reduced power state. However, the pSeries platform code really does need to read messages from the device, since they are initially written by firmware. Therefore: - Restore the previous behaviour of read_msi_msg_desc() - Add new functions get_cached_msi_msg{,_desc}() which return the last MSI message written - Use the new functions where appropriate Acked-by: Michael Ellerman Signed-off-by: Ben Hutchings Signed-off-by: Jesse Barnes

PCI MSI: Add support for multiple MSI

2009-03-20T17:48:14Z

Add the new API pci_enable_msi_block() to allow drivers to request multiple MSI and reimplement pci_enable_msi in terms of pci_enable_msi_block. Ensure that the architecture back ends don't have to know about multiple MSI. Signed-off-by: Matthew Wilcox Signed-off-by: Jesse Barnes

PCI MSI: Refactor interrupt masking code

2009-03-20T17:48:13Z

Since most of the callers already know whether they have an MSI or an MSI-X capability, split msi_set_mask_bits() into msi_mask_irq() and msix_mask_irq(). The only callers which don't (mask_msi_irq() and unmask_msi_irq()) can share code in msi_set_mask_bit(). This then becomes the only caller of msix_flush_writes(), so we can inline it. The flushing read can be to any address that belongs to the device, so we can eliminate the calculation too. We can also get rid of maskbits_mask from struct msi_desc and simply recalculate it on the rare occasion that we need it. The single-bit 'masked' element is replaced by a copy of the 32-bit 'masked' register, so this patch does not affect the size of msi_desc. Signed-off-by: Matthew Wilcox Signed-off-by: Jesse Barnes

PCI MSI: Use mask_pos instead of mask_base when appropriate

2009-03-20T17:48:13Z

MSI interrupts have a mask_pos where MSI-X have a mask_base. Use a transparent union to get rid of some ugly casts. Signed-off-by: Matthew Wilcox Signed-off-by: Jesse Barnes

PCI MSI: Replace 'type' with 'is_msix'

2009-03-20T17:48:12Z

By changing from a 5-bit field to a 1-bit field, we free up some bits that can be used by a later patch. Also rearrange the fields for better packing on 64-bit platforms (reducing the size of msi_desc from 72 bytes to 64 bytes). Signed-off-by: Matthew Wilcox Signed-off-by: Jesse Barnes

x86, MSI: pass irq_cfg and irq_desc

2008-12-08T13:31:59Z

Impact: simplify code Pass irq_desc and cfg around, instead of raw IRQ numbers - this way we dont have to look it up again and again. Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar