mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-11 23:50:25 +00:00
d31eb34240
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>
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
#ifndef LINUX_MSI_H
|
|
#define LINUX_MSI_H
|
|
|
|
#include <linux/kobject.h>
|
|
#include <linux/list.h>
|
|
|
|
struct msi_msg {
|
|
u32 address_lo; /* low 32 bits of msi message address */
|
|
u32 address_hi; /* high 32 bits of msi message address */
|
|
u32 data; /* 16 bits of msi message data */
|
|
};
|
|
|
|
extern int pci_msi_ignore_mask;
|
|
/* Helper functions */
|
|
struct irq_data;
|
|
struct msi_desc;
|
|
void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
|
|
void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
|
|
|
|
struct msi_desc {
|
|
struct {
|
|
__u8 is_msix : 1;
|
|
__u8 multiple: 3; /* log2 num of messages allocated */
|
|
__u8 multi_cap : 3; /* log2 num of messages supported */
|
|
__u8 maskbit : 1; /* mask-pending bit supported ? */
|
|
__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
|
|
__u16 entry_nr; /* specific enabled entry */
|
|
unsigned default_irq; /* default pre-assigned irq */
|
|
} msi_attrib;
|
|
|
|
u32 masked; /* mask bits */
|
|
unsigned int irq;
|
|
unsigned int nvec_used; /* number of messages */
|
|
struct list_head list;
|
|
|
|
union {
|
|
void __iomem *mask_base;
|
|
u8 mask_pos;
|
|
};
|
|
struct pci_dev *dev;
|
|
|
|
/* Last set MSI message */
|
|
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);
|
|
|
|
u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag);
|
|
u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag);
|
|
void pci_msi_mask_irq(struct irq_data *data);
|
|
void pci_msi_unmask_irq(struct irq_data *data);
|
|
|
|
/* Conversion helpers. Should be removed after merging */
|
|
static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
|
|
{
|
|
__pci_write_msi_msg(entry, msg);
|
|
}
|
|
static inline void write_msi_msg(int irq, struct msi_msg *msg)
|
|
{
|
|
pci_write_msi_msg(irq, msg);
|
|
}
|
|
static inline void mask_msi_irq(struct irq_data *data)
|
|
{
|
|
pci_msi_mask_irq(data);
|
|
}
|
|
static inline void unmask_msi_irq(struct irq_data *data)
|
|
{
|
|
pci_msi_unmask_irq(data);
|
|
}
|
|
|
|
/*
|
|
* The arch hooks to setup up msi irqs. Those functions are
|
|
* implemented as weak symbols so that they /can/ be overriden by
|
|
* architecture specific code if needed.
|
|
*/
|
|
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
|
|
void arch_teardown_msi_irq(unsigned int irq);
|
|
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
|
|
void arch_teardown_msi_irqs(struct pci_dev *dev);
|
|
void arch_restore_msi_irqs(struct pci_dev *dev);
|
|
|
|
void default_teardown_msi_irqs(struct pci_dev *dev);
|
|
void default_restore_msi_irqs(struct pci_dev *dev);
|
|
|
|
struct msi_controller {
|
|
struct module *owner;
|
|
struct device *dev;
|
|
struct device_node *of_node;
|
|
struct list_head list;
|
|
|
|
int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
|
|
struct msi_desc *desc);
|
|
void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
|
|
};
|
|
|
|
#endif /* LINUX_MSI_H */
|