[mirror_ubuntu-artful-kernel.git] / arch / s390 / include / asm / pci.h

#ifndef __ASM_S390_PCI_H
#define __ASM_S390_PCI_H

/* must be set before including asm-generic/pci.h */
#define PCI_DMA_BUS_IS_PHYS (0)
/* must be set before including pci_clp.h */
#define PCI_BAR_COUNT	6

#include <linux/pci.h>
#include <linux/mutex.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_DEVFN			0	/* default device number */

/* 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 {
	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;
	};
} __packed __aligned(128);

enum zpci_state {
	ZPCI_FN_STATE_RESERVED,
	ZPCI_FN_STATE_STANDBY,
	ZPCI_FN_STATE_CONFIGURED,
	ZPCI_FN_STATE_ONLINE,
	NR_ZPCI_FN_STATES,
};

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

struct s390_domain;

/* Private data per function */
struct zpci_dev {
	struct pci_bus	*bus;
	struct list_head entry;		/* list of all zpci_devices, needed for hotplug, etc. */

	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 */
	u16		domain;

	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 */
	struct airq_iv *aibv;		/* adapter interrupt bit vector */
	unsigned int	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;

	char res_name[16];
	struct zpci_bar_struct bars[PCI_BAR_COUNT];

	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;

	enum pci_bus_speed max_bus_speed;

	struct dentry	*debugfs_dev;
	struct dentry	*debugfs_perf;

	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[];

/* -----------------------------------------------------------------------------
  Prototypes
----------------------------------------------------------------------------- */
/* Base stuff */
int zpci_create_device(struct zpci_dev *);
int zpci_enable_device(struct zpci_dev *);
int zpci_disable_device(struct zpci_dev *);
void zpci_stop_device(struct zpci_dev *);
int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
int zpci_unregister_ioat(struct zpci_dev *, u8);

/* CLP */
int clp_scan_pci_devices(void);
int clp_rescan_pci_devices(void);
int clp_rescan_pci_devices_simple(void);
int clp_add_pci_device(u32, u32, int);
int clp_enable_fh(struct zpci_dev *, u8);
int clp_disable_fh(struct zpci_dev *);

#ifdef CONFIG_PCI
/* Error handling and recovery */
void zpci_event_error(void *);
void zpci_event_availability(void *);
void zpci_rescan(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) {}
static inline void zpci_rescan(void) {}
#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)
{
	return pdev->sysdata;
}

struct zpci_dev *get_zdev_by_fid(u32);

/* DMA */
int zpci_dma_init(void);
void zpci_dma_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 *);
void zpci_debug_info(struct zpci_dev *, struct seq_file *);

/* Error reporting */
int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);

#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
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_S390_PCI_H
	2	#define __ASM_S390_PCI_H
	3
cd248341	4	/* must be set before including asm-generic/pci.h */
1da177e4	5	#define PCI_DMA_BUS_IS_PHYS (0)
cd248341 JG	6	/* must be set before including pci_clp.h */
cd248341 JG	7	#define PCI_BAR_COUNT 6
1da177e4	8
57b5918c	9	#include <linux/pci.h>
80ed156a	10	#include <linux/mutex.h>
cd248341	11	#include <asm-generic/pci.h>
a755a45d	12	#include <asm/pci_clp.h>
d0b08853	13	#include <asm/pci_debug.h>
bd3a1725	14	#include <asm/sclp.h>
1da177e4	15
cd248341 JG	16	#define PCIBIOS_MIN_IO 0x1000
	17	#define PCIBIOS_MIN_MEM 0x10000000
	18
	19	#define pcibios_assign_all_busses() (0)
	20
	21	void __iomem pci_iomap(struct pci_dev , int, unsigned long);
	22	void pci_iounmap(struct pci_dev , void __iomem );
	23	int pci_domain_nr(struct pci_bus *);
	24	int pci_proc_domain(struct pci_bus *);
	25
	26	#define ZPCI_BUS_NR 0 /* default bus number */
	27	#define ZPCI_DEVFN 0 /* default device number */
	28
	29	/* PCI Function Controls */
	30	#define ZPCI_FC_FN_ENABLED 0x80
	31	#define ZPCI_FC_ERROR 0x40
	32	#define ZPCI_FC_BLOCKED 0x20
	33	#define ZPCI_FC_DMA_ENABLED 0x10
	34
f9dc447e SO	35	#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
	36
	37	struct zpci_fmb_fmt0 {
	38	u64 dma_rbytes;
	39	u64 dma_wbytes;
	40	};
	41
	42	struct zpci_fmb_fmt1 {
	43	u64 rx_bytes;
	44	u64 rx_packets;
	45	u64 tx_bytes;
	46	u64 tx_packets;
	47	};
	48
	49	struct zpci_fmb_fmt2 {
	50	u64 consumed_work_units;
	51	u64 max_work_units;
	52	};
	53
d0b08853	54	struct zpci_fmb {
f9dc447e SO	55	u32 format : 8;
f9dc447e SO	56	u32 fmt_ind : 24;
d0b08853 JG	57	u32 samples;
d0b08853 JG	58	u64 last_update;
f9dc447e	59	/* common counters */
d0b08853 JG	60	u64 ld_ops;
	61	u64 st_ops;
	62	u64 stb_ops;
	63	u64 rpcit_ops;
f9dc447e SO	64	/* format specific counters */
	65	union {
	66	struct zpci_fmb_fmt0 fmt0;
	67	struct zpci_fmb_fmt1 fmt1;
	68	struct zpci_fmb_fmt2 fmt2;
	69	};
9d89d9e6	70	} __packed __aligned(128);
d0b08853	71
cd248341 JG	72	enum zpci_state {
	73	ZPCI_FN_STATE_RESERVED,
	74	ZPCI_FN_STATE_STANDBY,
	75	ZPCI_FN_STATE_CONFIGURED,
	76	ZPCI_FN_STATE_ONLINE,
	77	NR_ZPCI_FN_STATES,
	78	};
	79
	80	struct zpci_bar_struct {
7a572a3a	81	struct resource res; / bus resource */
cd248341	82	u32 val; /* bar start & 3 flag bits */
cd248341	83	u16 map_idx; /* index into bar mapping array */
7a572a3a	84	u8 size; /* order 2 exponent */
cd248341 JG	85	};
cd248341 JG	86
8128f23c GS	87	struct s390_domain;
8128f23c GS	88
cd248341 JG	89	/* Private data per function */
cd248341 JG	90	struct zpci_dev {
cd248341 JG	91	struct pci_bus *bus;
	92	struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
	93
	94	enum zpci_state state;
	95	u32 fid; /* function ID, used by sclp */
	96	u32 fh; /* function handle, used by insn's */
ac4995b9	97	u16 vfn; /* virtual function number */
cd248341 JG	98	u16 pchid; /* physical channel ID */
cd248341 JG	99	u8 pfgid; /* function group ID */
ac4995b9	100	u8 pft; /* pci function type */
cd248341 JG	101	u16 domain;
cd248341 JG	102
80ed156a	103	struct mutex lock;
ac4995b9 SO	104	u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
	105	u32 uid; /* user defined id */
	106	u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
	107
9a4da8a5 JG	108	/* IRQ stuff */
9a4da8a5 JG	109	u64 msi_addr; /* MSI address */
b19148f6	110	unsigned int max_msi; /* maximum number of MSI's */
5d0d8f43	111	struct airq_iv aibv; / adapter interrupt bit vector */
9a4da8a5 JG	112	unsigned int aisb; /* number of the summary bit */
9a4da8a5 JG	113
828b35f6 JG	114	/* DMA stuff */
	115	unsigned long *dma_table;
	116	spinlock_t dma_table_lock;
	117	int tlb_refresh;
	118
	119	spinlock_t iommu_bitmap_lock;
	120	unsigned long *iommu_bitmap;
13954fd6	121	unsigned long *lazy_bitmap;
828b35f6 JG	122	unsigned long iommu_size;
	123	unsigned long iommu_pages;
	124	unsigned int next_bit;
	125
7a572a3a	126	char res_name[16];
cd248341 JG	127	struct zpci_bar_struct bars[PCI_BAR_COUNT];
cd248341 JG	128
828b35f6 JG	129	u64 start_dma; /* Start of available DMA addresses */
	130	u64 end_dma; /* End of available DMA addresses */
	131	u64 dma_mask; /* DMA address space mask */
	132
d0b08853 JG	133	/* Function measurement block */
	134	struct zpci_fmb *fmb;
	135	u16 fmb_update; /* update interval */
0b7589ec	136	u16 fmb_length;
6001018a SO	137	/* software counters */
	138	atomic64_t allocated_pages;
	139	atomic64_t mapped_pages;
	140	atomic64_t unmapped_pages;
d0b08853	141
cd248341	142	enum pci_bus_speed max_bus_speed;
d0b08853 JG	143
	144	struct dentry *debugfs_dev;
	145	struct dentry *debugfs_perf;
8128f23c GS	146
8128f23c GS	147	struct s390_domain s390_domain; / s390 IOMMU domain data */
cd248341 JG	148	};
	149
	150	static inline bool zdev_enabled(struct zpci_dev *zdev)
	151	{
	152	return (zdev->fh & (1UL << 31)) ? true : false;
	153	}
	154
93065d04 SO	155	extern const struct attribute_group *zpci_attr_groups[];
93065d04 SO	156
cd248341 JG	157	/* -----------------------------------------------------------------------------
	158	Prototypes
	159	----------------------------------------------------------------------------- */
	160	/* Base stuff */
cd248341 JG	161	int zpci_create_device(struct zpci_dev *);
cd248341 JG	162	int zpci_enable_device(struct zpci_dev *);
cb65a669	163	int zpci_disable_device(struct zpci_dev *);
cd248341	164	void zpci_stop_device(struct zpci_dev *);
828b35f6 JG	165	int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
828b35f6 JG	166	int zpci_unregister_ioat(struct zpci_dev *, u8);
cd248341	167
a755a45d	168	/* CLP */
1d578966 SO	169	int clp_scan_pci_devices(void);
1d578966 SO	170	int clp_rescan_pci_devices(void);
57b5918c	171	int clp_rescan_pci_devices_simple(void);
a755a45d JG	172	int clp_add_pci_device(u32, u32, int);
	173	int clp_enable_fh(struct zpci_dev *, u8);
	174	int clp_disable_fh(struct zpci_dev *);
	175
9a17e972	176	#ifdef CONFIG_PCI
cbc0dd1f JG	177	/* Error handling and recovery */
	178	void zpci_event_error(void *);
	179	void zpci_event_availability(void *);
57b5918c	180	void zpci_rescan(void);
aa3b7c29	181	bool zpci_is_enabled(void);
9a17e972 SO	182	#else /* CONFIG_PCI */
	183	static inline void zpci_event_error(void *e) {}
	184	static inline void zpci_event_availability(void *e) {}
57b5918c	185	static inline void zpci_rescan(void) {}
9a17e972	186	#endif /* CONFIG_PCI */
cbc0dd1f	187
67f43f38 SO	188	#ifdef CONFIG_HOTPLUG_PCI_S390
	189	int zpci_init_slot(struct zpci_dev *);
	190	void zpci_exit_slot(struct zpci_dev *);
	191	#else /* CONFIG_HOTPLUG_PCI_S390 */
	192	static inline int zpci_init_slot(struct zpci_dev *zdev)
	193	{
	194	return 0;
	195	}
	196	static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
	197	#endif /* CONFIG_HOTPLUG_PCI_S390 */
	198
cd248341	199	/* Helpers */
198a5278 SO	200	static inline struct zpci_dev to_zpci(struct pci_dev pdev)
	201	{
	202	return pdev->sysdata;
	203	}
	204
cd248341	205	struct zpci_dev *get_zdev_by_fid(u32);
cd248341	206
828b35f6 JG	207	/* DMA */
	208	int zpci_dma_init(void);
	209	void zpci_dma_exit(void);
	210
d0b08853 JG	211	/* FMB */
	212	int zpci_fmb_enable_device(struct zpci_dev *);
	213	int zpci_fmb_disable_device(struct zpci_dev *);
	214
	215	/* Debug */
	216	int zpci_debug_init(void);
	217	void zpci_debug_exit(void);
9a99649f	218	void zpci_debug_init_device(struct zpci_dev , const char );
d0b08853 JG	219	void zpci_debug_exit_device(struct zpci_dev *);
	220	void zpci_debug_info(struct zpci_dev , struct seq_file );
	221
bd3a1725 MS	222	/* Error reporting */
	223	int zpci_report_error(struct pci_dev , struct zpci_report_error_header );
	224
3a368f74 PH	225	#ifdef CONFIG_NUMA
	226
	227	/* Returns the node based on PCI bus */
	228	static inline int __pcibus_to_node(const struct pci_bus *bus)
	229	{
	230	return NUMA_NO_NODE;
	231	}
	232
	233	static inline const struct cpumask *
	234	cpumask_of_pcibus(const struct pci_bus *bus)
	235	{
	236	return cpu_online_mask;
	237	}
	238
	239	#endif /* CONFIG_NUMA */
	240
cd248341	241	#endif