1#ifndef __ASM_S390_PCI_H
2#define __ASM_S390_PCI_H
3
4/* must be set before including asm-generic/pci.h */
5#define PCI_DMA_BUS_IS_PHYS (0)
6/* must be set before including pci_clp.h */
7#define PCI_BAR_COUNT	6
8
9#include <linux/pci.h>
10#include <linux/mutex.h>
11#include <asm-generic/pci.h>
12#include <asm-generic/pci-dma-compat.h>
13#include <asm/pci_clp.h>
14#include <asm/pci_debug.h>
15
16#define PCIBIOS_MIN_IO		0x1000
17#define PCIBIOS_MIN_MEM		0x10000000
18
19#define pcibios_assign_all_busses()	(0)
20
21void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
22void pci_iounmap(struct pci_dev *, void __iomem *);
23int pci_domain_nr(struct pci_bus *);
24int 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
35struct zpci_fmb {
36	u32 format	:  8;
37	u32 dma_valid	:  1;
38	u32		: 23;
39	u32 samples;
40	u64 last_update;
41	/* hardware counters */
42	u64 ld_ops;
43	u64 st_ops;
44	u64 stb_ops;
45	u64 rpcit_ops;
46	u64 dma_rbytes;
47	u64 dma_wbytes;
48	u64 pad[2];
49} __packed __aligned(128);
50
51enum zpci_state {
52	ZPCI_FN_STATE_RESERVED,
53	ZPCI_FN_STATE_STANDBY,
54	ZPCI_FN_STATE_CONFIGURED,
55	ZPCI_FN_STATE_ONLINE,
56	NR_ZPCI_FN_STATES,
57};
58
59struct zpci_bar_struct {
60	struct resource *res;		/* bus resource */
61	u32		val;		/* bar start & 3 flag bits */
62	u16		map_idx;	/* index into bar mapping array */
63	u8		size;		/* order 2 exponent */
64};
65
66/* Private data per function */
67struct zpci_dev {
68	struct pci_dev	*pdev;
69	struct pci_bus	*bus;
70	struct list_head entry;		/* list of all zpci_devices, needed for hotplug, etc. */
71
72	enum zpci_state state;
73	u32		fid;		/* function ID, used by sclp */
74	u32		fh;		/* function handle, used by insn's */
75	u16		vfn;		/* virtual function number */
76	u16		pchid;		/* physical channel ID */
77	u8		pfgid;		/* function group ID */
78	u8		pft;		/* pci function type */
79	u16		domain;
80
81	struct mutex lock;
82	u8 pfip[CLP_PFIP_NR_SEGMENTS];	/* pci function internal path */
83	u32 uid;			/* user defined id */
84	u8 util_str[CLP_UTIL_STR_LEN];	/* utility string */
85
86	/* IRQ stuff */
87	u64		msi_addr;	/* MSI address */
88	unsigned int	max_msi;	/* maximum number of MSI's */
89	struct airq_iv *aibv;		/* adapter interrupt bit vector */
90	unsigned int	aisb;		/* number of the summary bit */
91
92	/* DMA stuff */
93	unsigned long	*dma_table;
94	spinlock_t	dma_table_lock;
95	int		tlb_refresh;
96
97	spinlock_t	iommu_bitmap_lock;
98	unsigned long	*iommu_bitmap;
99	unsigned long	iommu_size;
100	unsigned long	iommu_pages;
101	unsigned int	next_bit;
102
103	char res_name[16];
104	struct zpci_bar_struct bars[PCI_BAR_COUNT];
105
106	u64		start_dma;	/* Start of available DMA addresses */
107	u64		end_dma;	/* End of available DMA addresses */
108	u64		dma_mask;	/* DMA address space mask */
109
110	/* Function measurement block */
111	struct zpci_fmb *fmb;
112	u16		fmb_update;	/* update interval */
113	/* software counters */
114	atomic64_t allocated_pages;
115	atomic64_t mapped_pages;
116	atomic64_t unmapped_pages;
117
118	enum pci_bus_speed max_bus_speed;
119
120	struct dentry	*debugfs_dev;
121	struct dentry	*debugfs_perf;
122};
123
124static inline bool zdev_enabled(struct zpci_dev *zdev)
125{
126	return (zdev->fh & (1UL << 31)) ? true : false;
127}
128
129extern const struct attribute_group *zpci_attr_groups[];
130
131/* -----------------------------------------------------------------------------
132  Prototypes
133----------------------------------------------------------------------------- */
134/* Base stuff */
135int zpci_create_device(struct zpci_dev *);
136int zpci_enable_device(struct zpci_dev *);
137int zpci_disable_device(struct zpci_dev *);
138void zpci_stop_device(struct zpci_dev *);
139int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
140int zpci_unregister_ioat(struct zpci_dev *, u8);
141
142/* CLP */
143int clp_scan_pci_devices(void);
144int clp_rescan_pci_devices(void);
145int clp_rescan_pci_devices_simple(void);
146int clp_add_pci_device(u32, u32, int);
147int clp_enable_fh(struct zpci_dev *, u8);
148int clp_disable_fh(struct zpci_dev *);
149
150#ifdef CONFIG_PCI
151/* Error handling and recovery */
152void zpci_event_error(void *);
153void zpci_event_availability(void *);
154void zpci_rescan(void);
155bool zpci_is_enabled(void);
156#else /* CONFIG_PCI */
157static inline void zpci_event_error(void *e) {}
158static inline void zpci_event_availability(void *e) {}
159static inline void zpci_rescan(void) {}
160#endif /* CONFIG_PCI */
161
162#ifdef CONFIG_HOTPLUG_PCI_S390
163int zpci_init_slot(struct zpci_dev *);
164void zpci_exit_slot(struct zpci_dev *);
165#else /* CONFIG_HOTPLUG_PCI_S390 */
166static inline int zpci_init_slot(struct zpci_dev *zdev)
167{
168	return 0;
169}
170static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
171#endif /* CONFIG_HOTPLUG_PCI_S390 */
172
173/* Helpers */
174struct zpci_dev *get_zdev(struct pci_dev *);
175struct zpci_dev *get_zdev_by_fid(u32);
176
177/* DMA */
178int zpci_dma_init(void);
179void zpci_dma_exit(void);
180
181/* FMB */
182int zpci_fmb_enable_device(struct zpci_dev *);
183int zpci_fmb_disable_device(struct zpci_dev *);
184
185/* Debug */
186int zpci_debug_init(void);
187void zpci_debug_exit(void);
188void zpci_debug_init_device(struct zpci_dev *);
189void zpci_debug_exit_device(struct zpci_dev *);
190void zpci_debug_info(struct zpci_dev *, struct seq_file *);
191
192#endif
193