/* Helper functions */
struct irq_data;
struct msi_desc;
+struct pci_dev;
+struct platform_msi_priv_data;
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);
+typedef void (*irq_write_msi_msg_t)(struct msi_desc *desc,
+ struct msi_msg *msg);
+
+/**
+ * platform_msi_desc - Platform device specific msi descriptor data
+ * @msi_priv_data: Pointer to platform private data
+ * @msi_index: The index of the MSI descriptor for multi MSI
+ */
+struct platform_msi_desc {
+ struct platform_msi_priv_data *msi_priv_data;
+ u16 msi_index;
+};
+
+/**
+ * struct msi_desc - Descriptor structure for MSI based interrupts
+ * @list: List head for management
+ * @irq: The base interrupt number
+ * @nvec_used: The number of vectors used
+ * @dev: Pointer to the device which uses this descriptor
+ * @msg: The last set MSI message cached for reuse
+ *
+ * @masked: [PCI MSI/X] Mask bits
+ * @is_msix: [PCI MSI/X] True if MSI-X
+ * @multiple: [PCI MSI/X] log2 num of messages allocated
+ * @multi_cap: [PCI MSI/X] log2 num of messages supported
+ * @maskbit: [PCI MSI/X] Mask-Pending bit supported?
+ * @is_64: [PCI MSI/X] Address size: 0=32bit 1=64bit
+ * @entry_nr: [PCI MSI/X] Entry which is described by this descriptor
+ * @default_irq:[PCI MSI/X] The default pre-assigned non-MSI irq
+ * @mask_pos: [PCI MSI] Mask register position
+ * @mask_base: [PCI MSI-X] Mask register base address
+ * @platform: [platform] Platform device specific msi descriptor data
+ */
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;
+ /* Shared device/bus type independent data */
+ struct list_head list;
+ unsigned int irq;
+ unsigned int nvec_used;
+ struct device *dev;
+ struct msi_msg msg;
union {
- void __iomem *mask_base;
- u8 mask_pos;
- };
- struct pci_dev *dev;
+ /* PCI MSI/X specific data */
+ struct {
+ u32 masked;
+ struct {
+ __u8 is_msix : 1;
+ __u8 multiple : 3;
+ __u8 multi_cap : 3;
+ __u8 maskbit : 1;
+ __u8 is_64 : 1;
+ __u16 entry_nr;
+ unsigned default_irq;
+ } msi_attrib;
+ union {
+ u8 mask_pos;
+ void __iomem *mask_base;
+ };
+ };
- /* Last set MSI message */
- struct msi_msg msg;
+ /*
+ * Non PCI variants add their data structure here. New
+ * entries need to use a named structure. We want
+ * proper name spaces for this. The PCI part is
+ * anonymous for now as it would require an immediate
+ * tree wide cleanup.
+ */
+ struct platform_msi_desc platform;
+ };
};
/* 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 msi_desc_to_dev(desc) ((desc)->dev)
+#define dev_to_msi_list(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) \
#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)
+struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
+void *msi_desc_to_pci_sysdata(struct msi_desc *desc);
+#else /* CONFIG_PCI_MSI */
+static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
{
- return desc->dev;
+ return NULL;
}
#endif /* CONFIG_PCI_MSI */
+struct msi_desc *alloc_msi_entry(struct device *dev);
+void free_msi_entry(struct msi_desc *entry);
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);
struct device *dev;
struct device_node *of_node;
struct list_head list;
-#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
- struct irq_domain *domain;
-#endif
int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
struct msi_desc *desc);
+ int (*setup_irqs)(struct msi_controller *chip, struct pci_dev *dev,
+ int nvec, int type);
void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
};
struct irq_domain;
struct irq_chip;
struct device_node;
+struct fwnode_handle;
struct msi_domain_info;
/**
int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force);
-struct irq_domain *msi_create_irq_domain(struct device_node *of_node,
+struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info,
struct irq_domain *parent);
int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
+struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
+ struct msi_domain_info *info,
+ struct irq_domain *parent);
+int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg);
+void platform_msi_domain_free_irqs(struct device *dev);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg);
-struct irq_domain *pci_msi_create_irq_domain(struct device_node *node,
+struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info,
struct irq_domain *parent);
int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev,
int nvec, int type);
void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev);
-struct irq_domain *pci_msi_create_default_irq_domain(struct device_node *node,
+struct irq_domain *pci_msi_create_default_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info, struct irq_domain *parent);
irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
struct msi_desc *desc);
int pci_msi_domain_check_cap(struct irq_domain *domain,
struct msi_domain_info *info, struct device *dev);
+u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev);
+struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev);
+#else
+static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
+{
+ return NULL;
+}
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
#endif /* LINUX_MSI_H */
Code Review / kvmfornfv.git / blobdiff