arch/s390/include/asm/pci.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_S390_PCI_H
 #define __ASM_S390_PCI_H

 #include <linux/pci.h>
 #include <linux/mutex.h>
 #include <linux/iommu.h>
 #include <linux/pci_hotplug.h>
 #include <asm-generic/pci.h>
 #include <asm/pci_clp.h>
 #include <asm/pci_debug.h>
 #include <asm/sclp.h>

 #define PCIBIOS_MIN_IO		0x1000
 #define PCIBIOS_MIN_MEM		0x10000000

 #define pcibios_assign_all_busses()	(0)

 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
 void pci_iounmap(struct pci_dev *, void __iomem *);
 int pci_domain_nr(struct pci_bus *);
 int pci_proc_domain(struct pci_bus *);

 #define ZPCI_BUS_NR			0	/* default bus number */

 #define ZPCI_NR_DMA_SPACES		1
 #define ZPCI_NR_DEVICES			CONFIG_PCI_NR_FUNCTIONS
 #define ZPCI_DOMAIN_BITMAP_SIZE		(1 << 16)

 #ifdef PCI
 #if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
 # error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
 #endif
 #endif /* PCI */

 /* PCI Function Controls */
 #define ZPCI_FC_FN_ENABLED		0x80
 #define ZPCI_FC_ERROR			0x40
 #define ZPCI_FC_BLOCKED			0x20
 #define ZPCI_FC_DMA_ENABLED		0x10

 #define ZPCI_FMB_DMA_COUNTER_VALID	(1 << 23)

 struct zpci_fmb_fmt0 {
 	u64 dma_rbytes;
 	u64 dma_wbytes;
 };

 struct zpci_fmb_fmt1 {
 	u64 rx_bytes;
 	u64 rx_packets;
 	u64 tx_bytes;
 	u64 tx_packets;
 };

 struct zpci_fmb_fmt2 {
 	u64 consumed_work_units;
 	u64 max_work_units;
 };

 struct zpci_fmb_fmt3 {
 	u64 tx_bytes;
 };

 struct zpci_fmb {
 	u32 format	: 8;
 	u32 fmt_ind	: 24;
 	u32 samples;
 	u64 last_update;
 	/* common counters */
 	u64 ld_ops;
 	u64 st_ops;
 	u64 stb_ops;
 	u64 rpcit_ops;
 	/* format specific counters */
 	union {
 		struct zpci_fmb_fmt0 fmt0;
 		struct zpci_fmb_fmt1 fmt1;
 		struct zpci_fmb_fmt2 fmt2;
 		struct zpci_fmb_fmt3 fmt3;
 	};
 } __packed __aligned(128);

 enum zpci_state {
 	ZPCI_FN_STATE_STANDBY = 0,
 	ZPCI_FN_STATE_CONFIGURED = 1,
 	ZPCI_FN_STATE_RESERVED = 2,
 };

 struct zpci_bar_struct {
 	struct resource *res;		/* bus resource */
 	void __iomem	*mio_wb;
 	void __iomem	*mio_wt;
 	u32		val;		/* bar start & 3 flag bits */
 	u16		map_idx;	/* index into bar mapping array */
 	u8		size;		/* order 2 exponent */
 };

 struct s390_domain;

 #define ZPCI_FUNCTIONS_PER_BUS 256
 struct zpci_bus {
 	struct kref		kref;
 	struct pci_bus		*bus;
 	struct zpci_dev		*function[ZPCI_FUNCTIONS_PER_BUS];
 	struct list_head	resources;
 	struct list_head	bus_next;
 	struct resource		bus_resource;
 	int			pchid;
 	int			domain_nr;
 	bool			multifunction;
 	enum pci_bus_speed	max_bus_speed;
 };

 /* Private data per function */
 struct zpci_dev {
 	struct zpci_bus *zbus;
 	struct list_head entry;		/* list of all zpci_devices, needed for hotplug, etc. */
 	struct list_head bus_next;
 	struct kref kref;
 	struct hotplug_slot hotplug_slot;

 	enum zpci_state state;
 	u32		fid;		/* function ID, used by sclp */
 	u32		fh;		/* function handle, used by insn's */
 	u16		vfn;		/* virtual function number */
 	u16		pchid;		/* physical channel ID */
 	u8		pfgid;		/* function group ID */
 	u8		pft;		/* pci function type */
 	u8		port;
 	u8		rid_available	: 1;
 	u8		has_hp_slot	: 1;
 	u8		has_resources	: 1;
 	u8		is_physfn	: 1;
 	u8		util_str_avail	: 1;
 	u8		irqs_registered	: 1;
 	u8		reserved	: 2;
 	unsigned int	devfn;		/* DEVFN part of the RID*/

 	struct mutex lock;
 	u8 pfip[CLP_PFIP_NR_SEGMENTS];	/* pci function internal path */
 	u32 uid;			/* user defined id */
 	u8 util_str[CLP_UTIL_STR_LEN];	/* utility string */

 	/* IRQ stuff */
 	u64		msi_addr;	/* MSI address */
 	unsigned int	max_msi;	/* maximum number of MSI's */
 	unsigned int	msi_first_bit;
 	unsigned int	msi_nr_irqs;
 	struct airq_iv *aibv;		/* adapter interrupt bit vector */
 	unsigned long	aisb;		/* number of the summary bit */

 	/* DMA stuff */
 	unsigned long	*dma_table;
 	spinlock_t	dma_table_lock;
 	int		tlb_refresh;

 	spinlock_t	iommu_bitmap_lock;
 	unsigned long	*iommu_bitmap;
 	unsigned long	*lazy_bitmap;
 	unsigned long	iommu_size;
 	unsigned long	iommu_pages;
 	unsigned int	next_bit;

 	struct iommu_device iommu_dev;  /* IOMMU core handle */

 	char res_name[16];
 	bool mio_capable;
 	struct zpci_bar_struct bars[PCI_STD_NUM_BARS];

 	u64		start_dma;	/* Start of available DMA addresses */
 	u64		end_dma;	/* End of available DMA addresses */
 	u64		dma_mask;	/* DMA address space mask */

 	/* Function measurement block */
 	struct zpci_fmb *fmb;
 	u16		fmb_update;	/* update interval */
 	u16		fmb_length;
 	/* software counters */
 	atomic64_t allocated_pages;
 	atomic64_t mapped_pages;
 	atomic64_t unmapped_pages;

 	u8		version;
 	enum pci_bus_speed max_bus_speed;

 	struct dentry	*debugfs_dev;

 	struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 };

 static inline bool zdev_enabled(struct zpci_dev *zdev)
 {
 	return (zdev->fh & (1UL << 31)) ? true : false;
 }

 extern const struct attribute_group *zpci_attr_groups[];
 extern unsigned int s390_pci_force_floating __initdata;
 extern unsigned int s390_pci_no_rid;

 /* -----------------------------------------------------------------------------
   Prototypes
 ----------------------------------------------------------------------------- */
 /* Base stuff */
 struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
 int zpci_enable_device(struct zpci_dev *);
 int zpci_disable_device(struct zpci_dev *);
 int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
 int zpci_deconfigure_device(struct zpci_dev *zdev);
 void zpci_device_reserved(struct zpci_dev *zdev);
 bool zpci_is_device_configured(struct zpci_dev *zdev);

 int zpci_hot_reset_device(struct zpci_dev *zdev);
 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 int zpci_unregister_ioat(struct zpci_dev *, u8);
 void zpci_remove_reserved_devices(void);
 void zpci_update_fh(struct zpci_dev *zdev, u32 fh);

 /* CLP */
 int clp_setup_writeback_mio(void);
 int clp_scan_pci_devices(void);
 int clp_query_pci_fn(struct zpci_dev *zdev);
 int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
 int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);
 int clp_get_state(u32 fid, enum zpci_state *state);
 int clp_refresh_fh(u32 fid, u32 *fh);

 /* UID */
 void update_uid_checking(bool new);

 /* IOMMU Interface */
 int zpci_init_iommu(struct zpci_dev *zdev);
 void zpci_destroy_iommu(struct zpci_dev *zdev);

 #ifdef CONFIG_PCI
 static inline bool zpci_use_mio(struct zpci_dev *zdev)
 {
 	return static_branch_likely(&have_mio) && zdev->mio_capable;
 }

 /* Error handling and recovery */
 void zpci_event_error(void *);
 void zpci_event_availability(void *);
 bool zpci_is_enabled(void);
 #else /* CONFIG_PCI */
 static inline void zpci_event_error(void *e) {}
 static inline void zpci_event_availability(void *e) {}
 #endif /* CONFIG_PCI */

 #ifdef CONFIG_HOTPLUG_PCI_S390
 int zpci_init_slot(struct zpci_dev *);
 void zpci_exit_slot(struct zpci_dev *);
 #else /* CONFIG_HOTPLUG_PCI_S390 */
 static inline int zpci_init_slot(struct zpci_dev *zdev)
 {
 	return 0;
 }
 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 #endif /* CONFIG_HOTPLUG_PCI_S390 */

 /* Helpers */
 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
 {
 	struct zpci_bus *zbus = pdev->sysdata;

 	return zbus->function[pdev->devfn];
 }

 static inline struct zpci_dev *to_zpci_dev(struct device *dev)
 {
 	return to_zpci(to_pci_dev(dev));
 }

 struct zpci_dev *get_zdev_by_fid(u32);

 /* DMA */
 int zpci_dma_init(void);
 void zpci_dma_exit(void);
 int zpci_dma_init_device(struct zpci_dev *zdev);
 int zpci_dma_exit_device(struct zpci_dev *zdev);

 /* IRQ */
 int __init zpci_irq_init(void);
 void __init zpci_irq_exit(void);

 /* FMB */
 int zpci_fmb_enable_device(struct zpci_dev *);
 int zpci_fmb_disable_device(struct zpci_dev *);

 /* Debug */
 int zpci_debug_init(void);
 void zpci_debug_exit(void);
 void zpci_debug_init_device(struct zpci_dev *, const char *);
 void zpci_debug_exit_device(struct zpci_dev *);

 /* Error handling */
 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
 int zpci_clear_error_state(struct zpci_dev *zdev);
 int zpci_reset_load_store_blocked(struct zpci_dev *zdev);

 #ifdef CONFIG_NUMA

 /* Returns the node based on PCI bus */
 static inline int __pcibus_to_node(const struct pci_bus *bus)
 {
 	return NUMA_NO_NODE;
 }

 static inline const struct cpumask *
 cpumask_of_pcibus(const struct pci_bus *bus)
 {
 	return cpu_online_mask;
 }

 #endif /* CONFIG_NUMA */

 #endif
	/* SPDX-License-Identifier: GPL-2.0 */
	#ifndef __ASM_S390_PCI_H
	#define __ASM_S390_PCI_H

	#include <linux/pci.h>
	#include <linux/mutex.h>
	#include <linux/iommu.h>
	#include <linux/pci_hotplug.h>
	#include <asm-generic/pci.h>
	#include <asm/pci_clp.h>
	#include <asm/pci_debug.h>
	#include <asm/sclp.h>

	#define PCIBIOS_MIN_IO 0x1000
	#define PCIBIOS_MIN_MEM 0x10000000

	#define pcibios_assign_all_busses() (0)

	void __iomem pci_iomap(struct pci_dev , int, unsigned long);
	void pci_iounmap(struct pci_dev , void __iomem );
	int pci_domain_nr(struct pci_bus *);
	int pci_proc_domain(struct pci_bus *);

	#define ZPCI_BUS_NR 0 /* default bus number */

	#define ZPCI_NR_DMA_SPACES 1
	#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
	#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)

	#ifdef PCI
	#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
	# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
	#endif
	#endif /* PCI */

	/* PCI Function Controls */
	#define ZPCI_FC_FN_ENABLED 0x80
	#define ZPCI_FC_ERROR 0x40
	#define ZPCI_FC_BLOCKED 0x20
	#define ZPCI_FC_DMA_ENABLED 0x10

	#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)

	struct zpci_fmb_fmt0 {
	u64 dma_rbytes;
	u64 dma_wbytes;
	};

	struct zpci_fmb_fmt1 {
	u64 rx_bytes;
	u64 rx_packets;
	u64 tx_bytes;
	u64 tx_packets;
	};

	struct zpci_fmb_fmt2 {
	u64 consumed_work_units;
	u64 max_work_units;
	};

	struct zpci_fmb_fmt3 {
	u64 tx_bytes;
	};

	struct zpci_fmb {
	u32 format : 8;
	u32 fmt_ind : 24;
	u32 samples;
	u64 last_update;
	/* common counters */
	u64 ld_ops;
	u64 st_ops;
	u64 stb_ops;
	u64 rpcit_ops;
	/* format specific counters */
	union {
	struct zpci_fmb_fmt0 fmt0;
	struct zpci_fmb_fmt1 fmt1;
	struct zpci_fmb_fmt2 fmt2;
	struct zpci_fmb_fmt3 fmt3;
	};
	} __packed __aligned(128);

	enum zpci_state {
	ZPCI_FN_STATE_STANDBY = 0,
	ZPCI_FN_STATE_CONFIGURED = 1,
	ZPCI_FN_STATE_RESERVED = 2,
	};

	struct zpci_bar_struct {
	struct resource res; / bus resource */
	void __iomem *mio_wb;
	void __iomem *mio_wt;
	u32 val; /* bar start & 3 flag bits */
	u16 map_idx; /* index into bar mapping array */
	u8 size; /* order 2 exponent */
	};

	struct s390_domain;

	#define ZPCI_FUNCTIONS_PER_BUS 256
	struct zpci_bus {
	struct kref kref;
	struct pci_bus *bus;
	struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
	struct list_head resources;
	struct list_head bus_next;
	struct resource bus_resource;
	int pchid;
	int domain_nr;
	bool multifunction;
	enum pci_bus_speed max_bus_speed;
	};

	/* Private data per function */
	struct zpci_dev {
	struct zpci_bus *zbus;
	struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
	struct list_head bus_next;
	struct kref kref;
	struct hotplug_slot hotplug_slot;

	enum zpci_state state;
	u32 fid; /* function ID, used by sclp */
	u32 fh; /* function handle, used by insn's */
	u16 vfn; /* virtual function number */
	u16 pchid; /* physical channel ID */
	u8 pfgid; /* function group ID */
	u8 pft; /* pci function type */
	u8 port;
	u8 rid_available : 1;
	u8 has_hp_slot : 1;
	u8 has_resources : 1;
	u8 is_physfn : 1;
	u8 util_str_avail : 1;
	u8 irqs_registered : 1;
	u8 reserved : 2;
	unsigned int devfn; /* DEVFN part of the RID*/

	struct mutex lock;
	u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
	u32 uid; /* user defined id */
	u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */

	/* IRQ stuff */
	u64 msi_addr; /* MSI address */
	unsigned int max_msi; /* maximum number of MSI's */
	unsigned int msi_first_bit;
	unsigned int msi_nr_irqs;
	struct airq_iv aibv; / adapter interrupt bit vector */
	unsigned long aisb; /* number of the summary bit */

	/* DMA stuff */
	unsigned long *dma_table;
	spinlock_t dma_table_lock;
	int tlb_refresh;

	spinlock_t iommu_bitmap_lock;
	unsigned long *iommu_bitmap;
	unsigned long *lazy_bitmap;
	unsigned long iommu_size;
	unsigned long iommu_pages;
	unsigned int next_bit;

	struct iommu_device iommu_dev; /* IOMMU core handle */

	char res_name[16];
	bool mio_capable;
	struct zpci_bar_struct bars[PCI_STD_NUM_BARS];

	u64 start_dma; /* Start of available DMA addresses */
	u64 end_dma; /* End of available DMA addresses */
	u64 dma_mask; /* DMA address space mask */

	/* Function measurement block */
	struct zpci_fmb *fmb;
	u16 fmb_update; /* update interval */
	u16 fmb_length;
	/* software counters */
	atomic64_t allocated_pages;
	atomic64_t mapped_pages;
	atomic64_t unmapped_pages;

	u8 version;
	enum pci_bus_speed max_bus_speed;

	struct dentry *debugfs_dev;

	struct s390_domain s390_domain; / s390 IOMMU domain data */
	};

	static inline bool zdev_enabled(struct zpci_dev *zdev)
	{
	return (zdev->fh & (1UL << 31)) ? true : false;
	}

	extern const struct attribute_group *zpci_attr_groups[];
	extern unsigned int s390_pci_force_floating __initdata;
	extern unsigned int s390_pci_no_rid;

	/* -----------------------------------------------------------------------------
	Prototypes
	----------------------------------------------------------------------------- */
	/* Base stuff */
	struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
	int zpci_enable_device(struct zpci_dev *);
	int zpci_disable_device(struct zpci_dev *);
	int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
	int zpci_deconfigure_device(struct zpci_dev *zdev);
	void zpci_device_reserved(struct zpci_dev *zdev);
	bool zpci_is_device_configured(struct zpci_dev *zdev);

	int zpci_hot_reset_device(struct zpci_dev *zdev);
	int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
	int zpci_unregister_ioat(struct zpci_dev *, u8);
	void zpci_remove_reserved_devices(void);
	void zpci_update_fh(struct zpci_dev *zdev, u32 fh);

	/* CLP */
	int clp_setup_writeback_mio(void);
	int clp_scan_pci_devices(void);
	int clp_query_pci_fn(struct zpci_dev *zdev);
	int clp_enable_fh(struct zpci_dev zdev, u32 fh, u8 nr_dma_as);
	int clp_disable_fh(struct zpci_dev zdev, u32 fh);
	int clp_get_state(u32 fid, enum zpci_state *state);
	int clp_refresh_fh(u32 fid, u32 *fh);

	/* UID */
	void update_uid_checking(bool new);

	/* IOMMU Interface */
	int zpci_init_iommu(struct zpci_dev *zdev);
	void zpci_destroy_iommu(struct zpci_dev *zdev);

	#ifdef CONFIG_PCI
	static inline bool zpci_use_mio(struct zpci_dev *zdev)
	{
	return static_branch_likely(&have_mio) && zdev->mio_capable;
	}

	/* Error handling and recovery */
	void zpci_event_error(void *);
	void zpci_event_availability(void *);
	bool zpci_is_enabled(void);
	#else /* CONFIG_PCI */
	static inline void zpci_event_error(void *e) {}
	static inline void zpci_event_availability(void *e) {}
	#endif /* CONFIG_PCI */

	#ifdef CONFIG_HOTPLUG_PCI_S390
	int zpci_init_slot(struct zpci_dev *);
	void zpci_exit_slot(struct zpci_dev *);
	#else /* CONFIG_HOTPLUG_PCI_S390 */
	static inline int zpci_init_slot(struct zpci_dev *zdev)
	{
	return 0;
	}
	static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
	#endif /* CONFIG_HOTPLUG_PCI_S390 */

	/* Helpers */
	static inline struct zpci_dev to_zpci(struct pci_dev pdev)
	{
	struct zpci_bus *zbus = pdev->sysdata;

	return zbus->function[pdev->devfn];
	}

	static inline struct zpci_dev to_zpci_dev(struct device dev)
	{
	return to_zpci(to_pci_dev(dev));
	}

	struct zpci_dev *get_zdev_by_fid(u32);

	/* DMA */
	int zpci_dma_init(void);
	void zpci_dma_exit(void);
	int zpci_dma_init_device(struct zpci_dev *zdev);
	int zpci_dma_exit_device(struct zpci_dev *zdev);

	/* IRQ */
	int __init zpci_irq_init(void);
	void __init zpci_irq_exit(void);

	/* FMB */
	int zpci_fmb_enable_device(struct zpci_dev *);
	int zpci_fmb_disable_device(struct zpci_dev *);

	/* Debug */
	int zpci_debug_init(void);
	void zpci_debug_exit(void);
	void zpci_debug_init_device(struct zpci_dev , const char );
	void zpci_debug_exit_device(struct zpci_dev *);

	/* Error handling */
	int zpci_report_error(struct pci_dev , struct zpci_report_error_header );
	int zpci_clear_error_state(struct zpci_dev *zdev);
	int zpci_reset_load_store_blocked(struct zpci_dev *zdev);

	#ifdef CONFIG_NUMA

	/* Returns the node based on PCI bus */
	static inline int __pcibus_to_node(const struct pci_bus *bus)
	{
	return NUMA_NO_NODE;
	}

	static inline const struct cpumask *
	cpumask_of_pcibus(const struct pci_bus *bus)
	{
	return cpu_online_mask;
	}

	#endif /* CONFIG_NUMA */

	#endif