From mboxrd@z Thu Jan 1 00:00:00 1970 From: jiang.liu@linux.intel.com (Jiang Liu) Date: Mon, 17 Nov 2014 19:03:18 +0800 Subject: [Patch V3 5/9] PCI, MSI: Introduce helpers to hide struct msi_desc implementation details In-Reply-To: <1416222202-28002-1-git-send-email-jiang.liu@linux.intel.com> References: <1416222202-28002-1-git-send-email-jiang.liu@linux.intel.com> Message-ID: <1416222202-28002-6-git-send-email-jiang.liu@linux.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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