Commit-ID: d31eb342409b24e3d2e1989c775f3361e93acc08 Gitweb: http://git.kernel.org/tip/d31eb342409b24e3d2e1989c775f3361e93acc08 Author: Jiang Liu <[email protected]> AuthorDate: Sat, 15 Nov 2014 22:24:03 +0800 Committer: Thomas Gleixner <[email protected]> CommitDate: Sun, 23 Nov 2014 13:01:45 +0100
PCI/MSI: Introduce helpers to hide struct msi_desc implementation details Introduce helpers to hide struct msi_desc implementation details, so we could easily support non-PCI-compliant MSI devices later by moving msi_list into struct device. Signed-off-by: Jiang Liu <[email protected]> Cc: Tony Luck <[email protected]> Cc: [email protected] Cc: Bjorn Helgaas <[email protected]> Cc: Grant Likely <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Yijing Wang <[email protected]> Cc: Yingjoe Chen <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Matthias Brugger <[email protected]> Cc: Alexander Gordeev <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- include/linux/msi.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/msi.h b/include/linux/msi.h index 1dcad0c..e0d0851 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -43,6 +43,25 @@ struct msi_desc { struct msi_msg msg; }; +/* Helpers to hide struct msi_desc implementation details */ +#define msi_desc_to_dev(desc) (&(desc)->dev.dev) +#define dev_to_msi_list(dev) (&to_pci_dev((dev))->msi_list) +#define first_msi_entry(dev) \ + list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list) +#define for_each_msi_entry(desc, dev) \ + list_for_each_entry((desc), dev_to_msi_list((dev)), list) + +#ifdef CONFIG_PCI_MSI +#define first_pci_msi_entry(pdev) first_msi_entry(&(pdev)->dev) +#define for_each_pci_msi_entry(desc, pdev) \ + for_each_msi_entry((desc), &(pdev)->dev) + +static inline struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) +{ + return desc->dev; +} +#endif /* CONFIG_PCI_MSI */ + void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
