Messages in this thread Patch in this message | | | From | Jiang Liu <> | Subject | [Patch V1 2/6] PCI, MSI: Introduce helpers to hide struct msi_desc implemenation details | Date | Thu, 13 Nov 2014 19:43:44 +0800 |
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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 <jiang.liu@linux.intel.com> --- include/linux/msi.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/include/linux/msi.h b/include/linux/msi.h index 190c7abbec84..714716a3ffdd 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -44,6 +44,25 @@ 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); -- 1.7.10.4
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