Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 243 insertions, 0 deletions

diff --git a/kernel/include/linux/msi.h b/kernel/include/linux/msi.h
new file mode 100644
index 000000000..8ac4a68ff
--- /dev/null
+++ b/kernel/include/linux/msi.h
@@ -0,0 +1,243 @@
+#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;
+#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);
+	void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
+};
+
+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+
+#include <linux/irqhandler.h>
+#include <asm/msi.h>
+
+struct irq_domain;
+struct irq_chip;
+struct device_node;
+struct msi_domain_info;
+
+/**
+ * struct msi_domain_ops - MSI interrupt domain callbacks
+ * @get_hwirq:		Retrieve the resulting hw irq number
+ * @msi_init:		Domain specific init function for MSI interrupts
+ * @msi_free:		Domain specific function to free a MSI interrupts
+ * @msi_check:		Callback for verification of the domain/info/dev data
+ * @msi_prepare:	Prepare the allocation of the interrupts in the domain
+ * @msi_finish:		Optional callbacl to finalize the allocation
+ * @set_desc:		Set the msi descriptor for an interrupt
+ * @handle_error:	Optional error handler if the allocation fails
+ *
+ * @get_hwirq, @msi_init and @msi_free are callbacks used by
+ * msi_create_irq_domain() and related interfaces
+ *
+ * @msi_check, @msi_prepare, @msi_finish, @set_desc and @handle_error
+ * are callbacks used by msi_irq_domain_alloc_irqs() and related
+ * interfaces which are based on msi_desc.
+ */
+struct msi_domain_ops {
+	irq_hw_number_t	(*get_hwirq)(struct msi_domain_info *info,
+				     msi_alloc_info_t *arg);
+	int		(*msi_init)(struct irq_domain *domain,
+				    struct msi_domain_info *info,
+				    unsigned int virq, irq_hw_number_t hwirq,
+				    msi_alloc_info_t *arg);
+	void		(*msi_free)(struct irq_domain *domain,
+				    struct msi_domain_info *info,
+				    unsigned int virq);
+	int		(*msi_check)(struct irq_domain *domain,
+				     struct msi_domain_info *info,
+				     struct device *dev);
+	int		(*msi_prepare)(struct irq_domain *domain,
+				       struct device *dev, int nvec,
+				       msi_alloc_info_t *arg);
+	void		(*msi_finish)(msi_alloc_info_t *arg, int retval);
+	void		(*set_desc)(msi_alloc_info_t *arg,
+				    struct msi_desc *desc);
+	int		(*handle_error)(struct irq_domain *domain,
+					struct msi_desc *desc, int error);
+};
+
+/**
+ * struct msi_domain_info - MSI interrupt domain data
+ * @flags:		Flags to decribe features and capabilities
+ * @ops:		The callback data structure
+ * @chip:		Optional: associated interrupt chip
+ * @chip_data:		Optional: associated interrupt chip data
+ * @handler:		Optional: associated interrupt flow handler
+ * @handler_data:	Optional: associated interrupt flow handler data
+ * @handler_name:	Optional: associated interrupt flow handler name
+ * @data:		Optional: domain specific data
+ */
+struct msi_domain_info {
+	u32			flags;
+	struct msi_domain_ops	*ops;
+	struct irq_chip		*chip;
+	void			*chip_data;
+	irq_flow_handler_t	handler;
+	void			*handler_data;
+	const char		*handler_name;
+	void			*data;
+};
+
+/* Flags for msi_domain_info */
+enum {
+	/*
+	 * Init non implemented ops callbacks with default MSI domain
+	 * callbacks.
+	 */
+	MSI_FLAG_USE_DEF_DOM_OPS	= (1 << 0),
+	/*
+	 * Init non implemented chip callbacks with default MSI chip
+	 * callbacks.
+	 */
+	MSI_FLAG_USE_DEF_CHIP_OPS	= (1 << 1),
+	/* Build identity map between hwirq and irq */
+	MSI_FLAG_IDENTITY_MAP		= (1 << 2),
+	/* Support multiple PCI MSI interrupts */
+	MSI_FLAG_MULTI_PCI_MSI		= (1 << 3),
+	/* Support PCI MSIX interrupts */
+	MSI_FLAG_PCI_MSIX		= (1 << 4),
+};
+
+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 msi_domain_info *info,
+					 struct irq_domain *parent);
+int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
+			  int nvec);
+void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
+struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
+
+#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 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 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);
+#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
+
+#endif /* LINUX_MSI_H */