summaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/pci.h
blob: be41f4f885ce21bc434c2bf767248341b26d9c77 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
#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 <asm-generic/pci.h>
#include <asm-generic/pci-dma-compat.h>
#include <asm/pci_clp.h>
#include <asm/pci_debug.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 *);

/* MSI arch hooks */
#define arch_setup_msi_irqs	arch_setup_msi_irqs
#define arch_teardown_msi_irqs	arch_teardown_msi_irqs

#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

struct zpci_fmb {
	u32 format	:  8;
	u32 dma_valid	:  1;
	u32		: 23;
	u32 samples;
	u64 last_update;
	/* hardware counters */
	u64 ld_ops;
	u64 st_ops;
	u64 stb_ops;
	u64 rpcit_ops;
	u64 dma_rbytes;
	u64 dma_wbytes;
	/* software counters */
	atomic64_t allocated_pages;
	atomic64_t mapped_pages;
	atomic64_t unmapped_pages;
} __packed __aligned(16);

struct msi_map {
	unsigned long irq;
	struct msi_desc *msi;
	struct hlist_node msi_chain;
};

#define ZPCI_NR_MSI_VECS	64
#define ZPCI_MSI_MASK		(ZPCI_NR_MSI_VECS - 1)

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

/* Private data per function */
struct zpci_dev {
	struct pci_dev	*pdev;
	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		pchid;		/* physical channel ID */
	u8		pfgid;		/* function group ID */
	u16		domain;

	/* IRQ stuff */
	u64		msi_addr;	/* MSI address */
	struct zdev_irq_map *irq_map;
	struct msi_map *msi_map[ZPCI_NR_MSI_VECS];
	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	iommu_size;
	unsigned long	iommu_pages;
	unsigned int	next_bit;

	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 */

	enum pci_bus_speed max_bus_speed;

	struct dentry	*debugfs_dev;
	struct dentry	*debugfs_perf;
	struct dentry	*debugfs_debug;
};

struct pci_hp_callback_ops {
	int (*create_slot)	(struct zpci_dev *zdev);
	void (*remove_slot)	(struct zpci_dev *zdev);
};

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

/* -----------------------------------------------------------------------------
  Prototypes
----------------------------------------------------------------------------- */
/* Base stuff */
struct zpci_dev *zpci_alloc_device(void);
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 *);
void zpci_free_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_find_pci_devices(void);
int clp_add_pci_device(u32, u32, int);
int clp_enable_fh(struct zpci_dev *, u8);
int clp_disable_fh(struct zpci_dev *);

/* MSI */
struct msi_desc *__irq_get_msi_desc(unsigned int);
int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32);
int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int);
void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
int zpci_msihash_init(void);
void zpci_msihash_exit(void);

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

/* Helpers */
struct zpci_dev *get_zdev(struct pci_dev *);
struct zpci_dev *get_zdev_by_fid(u32);
bool zpci_fid_present(u32);

/* sysfs */
int zpci_sysfs_add_device(struct device *);
void zpci_sysfs_remove_device(struct device *);

/* DMA */
int zpci_dma_init(void);
void zpci_dma_exit(void);

/* Hotplug */
extern struct mutex zpci_list_lock;
extern struct list_head zpci_list;
extern unsigned int s390_pci_probe;

void zpci_register_hp_ops(struct pci_hp_callback_ops *);
void zpci_deregister_hp_ops(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 *);
void zpci_debug_exit_device(struct zpci_dev *);
void zpci_debug_info(struct zpci_dev *, struct seq_file *);

#endif