This series is against "next" branch in Bjorn's repo:
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git
Changes from v4 to v5:
- pci_auto_enable_msi* functions renamed to pci_enable_msi* ones;
- pci_enable_msi_range() and pci_enable_msix_range() are the only
basic interfaces left to enable MSI/MSI-X operation;
- pci_enable_msi(), pci_enable_msi_block() and pci_enable_msix() old
interfaces deprecated in favour of pci_enable_msi/msix_range() ones;
description of the old interfaces is removed from the documentation;
- pci_get_msi_vec_count() renamed to pci_msi_vec_count() and
pci_get_msix_vec_count() renamed to pci_msix_vec_count();
Changes from v3 to v4:
- pcim_enable_msi* functions renamed to pci_auto_enable_msi* ones;
- PowerPC patches dropped;
- pci_get_msi_cap() renamed to pci_get_msi_vec_count() and
pci_msix_table_size() renamed to pci_get_msix_vec_count();
Changes from v2 to v3:
- new public interfaces commented in drivers/pci/msi.c;
- patch "Make quota traversing and requesting race-safe" explained;
- pci_enable_msi/msix() 'nvec' arg type changed from 'unsigned int' to 'int';
- pcim_enable_msi*() arg 'nvec' renamed to 'maxvec' when upper limit passed;
- pcim_enable_msi*(..., maxvec, minvec) arg order swapped to minvec, maxvec;
- "PCI: Fail MSI/MSI-X initialization if device is not in PCI_D0" commit
869a161 and "PCI/MSI: Factor out pci_get_msi_cap() interface" patch
conflicts resolved;
This update introduces pci_enable_msi_range() function which
supersedes pci_enable_msi() and pci_enable_msi_block()
interfaces for MSI and pci_enable_msi_range() function which
supersedes pci_enable_msix() interface for MSI-X interrupts.
The plan is to convert all drivers to the new interfaces and
then remove existing pci_enable_msi(), pci_enable_msi_block()
and pci_enable_msix() functions.
The newly introduced functions return either a negative error
code or a number of successfully allocated MSI/MSI-X interrupts.
Unlike the old interfaces where the "third" state indicates
a possible number of MSI interrupts that could have been
allocated, the new interfaces allow device drivers not to deal
with tri-state return values and hide fallback logic behind
the implementation.
As result, device drivers are expected to have more clearer
and straight code.
The tree could be found in "pci-next-msi-v5" branch in repo:
https://github.com/a-gordeev/linux.git
Alexander Gordeev (4):
PCI/MSI: Factor out pci_msi_vec_count() interface
PCI/MSI: Get rid of pci_enable_msi_block_auto() interface
PCI/MSI: Introduce pci_msix_vec_count() interface
PCI/MSI: Introduce pci_enable_msi/msix_range() interfaces
Documentation/PCI/MSI-HOWTO.txt | 308 ++++++++++++++++++++++++++-------------
drivers/ata/ahci.c | 56 +++++---
drivers/pci/msi.c | 150 +++++++++++++++-----
drivers/pci/pcie/portdrv_core.c | 7 +-
include/linux/pci.h | 27 +++-
5 files changed, 385 insertions(+), 163 deletions(-)
--
1.7.7.6
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