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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2014-11-15 22:24:03 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-23 13:01:45 +0100 |
| commit | d31eb342409b24e3d2e1989c775f3361e93acc08 (patch) | |
| tree | 3111e846abcb5cbbc6fcfbe81cc81cefdfd2e391 | |
| parent | 280510f1060b4fb2f5853a92b7723e5330529338 (diff) | |
| download | lwn-d31eb342409b24e3d2e1989c775f3361e93acc08.tar.gz lwn-d31eb342409b24e3d2e1989c775f3361e93acc08.zip | |
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 <jiang.liu@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Alexander Gordeev <agordeev@redhat.com>
Link: http://lkml.kernel.org/r/1416061447-9472-6-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/linux/msi.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 1dcad0c1e806..e0d08517bd3d 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); |