summaryrefslogtreecommitdiff
path: root/arch/sparc/kernel/pci_impl.h
blob: e20ed5f06e9c999652af80a730b15455aa6bb773 (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
/* pci_impl.h: Helper definitions for PCI controller support.
 *
 * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
 */

#ifndef PCI_IMPL_H
#define PCI_IMPL_H

#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/msi.h>
#include <linux/of_device.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/iommu.h>

/* The abstraction used here is that there are PCI controllers,
 * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
 * underneath.  Each PCI bus module uses an IOMMU (shared by both
 * PBMs of a controller, or per-PBM), and if a streaming buffer
 * is present, each PCI bus module has it's own. (ie. the IOMMU
 * might be shared between PBMs, the STC is never shared)
 * Furthermore, each PCI bus module controls it's own autonomous
 * PCI bus.
 */

#define PCI_STC_FLUSHFLAG_INIT(STC) \
	(*((STC)->strbuf_flushflag) = 0UL)
#define PCI_STC_FLUSHFLAG_SET(STC) \
	(*((STC)->strbuf_flushflag) != 0UL)

#ifdef CONFIG_PCI_MSI
struct pci_pbm_info;
struct sparc64_msiq_ops {
	int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
			unsigned long *head);
	int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
			   unsigned long *head, unsigned long *msi);
	int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
			unsigned long head);
	int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
			 unsigned long msi, int is_msi64);
	int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
	int (*msiq_alloc)(struct pci_pbm_info *pbm);
	void (*msiq_free)(struct pci_pbm_info *pbm);
	int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
			      unsigned long devino);
};

extern void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
				 const struct sparc64_msiq_ops *ops);

struct sparc64_msiq_cookie {
	struct pci_pbm_info *pbm;
	unsigned long msiqid;
};
#endif

struct pci_pbm_info {
	struct pci_pbm_info		*next;
	struct pci_pbm_info		*sibling;
	int				index;

	/* Physical address base of controller registers. */
	unsigned long			controller_regs;

	/* Physical address base of PBM registers. */
	unsigned long			pbm_regs;

	/* Physical address of DMA sync register, if any.  */
	unsigned long			sync_reg;

	/* Opaque 32-bit system bus Port ID. */
	u32				portid;

	/* Opaque 32-bit handle used for hypervisor calls.  */
	u32				devhandle;

	/* Chipset version information. */
	int				chip_type;
#define PBM_CHIP_TYPE_SABRE		1
#define PBM_CHIP_TYPE_PSYCHO		2
#define PBM_CHIP_TYPE_SCHIZO		3
#define PBM_CHIP_TYPE_SCHIZO_PLUS	4
#define PBM_CHIP_TYPE_TOMATILLO		5
	int				chip_version;
	int				chip_revision;

	/* Name used for top-level resources. */
	char				*name;

	/* OBP specific information. */
	struct platform_device		*op;
	u64				ino_bitmap;

	/* PBM I/O and Memory space resources. */
	struct resource			io_space;
	struct resource			mem_space;

	/* Base of PCI Config space, can be per-PBM or shared. */
	unsigned long			config_space;

	/* This will be 12 on PCI-E controllers, 8 elsewhere.  */
	unsigned long			config_space_reg_bits;

	unsigned long			pci_afsr;
	unsigned long			pci_afar;
	unsigned long			pci_csr;

	/* State of 66MHz capabilities on this PBM. */
	int				is_66mhz_capable;
	int				all_devs_66mhz;

#ifdef CONFIG_PCI_MSI
	/* MSI info.  */
	u32				msiq_num;
	u32				msiq_ent_count;
	u32				msiq_first;
	u32				msiq_first_devino;
	u32				msiq_rotor;
	struct sparc64_msiq_cookie	*msiq_irq_cookies;
	u32				msi_num;
	u32				msi_first;
	u32				msi_data_mask;
	u32				msix_data_width;
	u64				msi32_start;
	u64				msi64_start;
	u32				msi32_len;
	u32				msi64_len;
	void				*msi_queues;
	unsigned long			*msi_bitmap;
	unsigned int			*msi_irq_table;
	int (*setup_msi_irq)(unsigned int *virt_irq_p, struct pci_dev *pdev,
			     struct msi_desc *entry);
	void (*teardown_msi_irq)(unsigned int virt_irq, struct pci_dev *pdev);
	const struct sparc64_msiq_ops	*msi_ops;
#endif /* !(CONFIG_PCI_MSI) */

	/* This PBM's streaming buffer. */
	struct strbuf			stc;

	/* IOMMU state, potentially shared by both PBM segments. */
	struct iommu			*iommu;

	/* Now things for the actual PCI bus probes. */
	unsigned int			pci_first_busno;
	unsigned int			pci_last_busno;
	struct pci_bus			*pci_bus;
	struct pci_ops			*pci_ops;

	int				numa_node;
};

extern struct pci_pbm_info *pci_pbm_root;

extern int pci_num_pbms;

/* PCI bus scanning and fixup support. */
extern void pci_get_pbm_props(struct pci_pbm_info *pbm);
extern struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
					struct device *parent);
extern void pci_determine_mem_io_space(struct pci_pbm_info *pbm);

/* Error reporting support. */
extern void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
extern void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
extern void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);

/* Configuration space access. */
extern void pci_config_read8(u8 *addr, u8 *ret);
extern void pci_config_read16(u16 *addr, u16 *ret);
extern void pci_config_read32(u32 *addr, u32 *ret);
extern void pci_config_write8(u8 *addr, u8 val);
extern void pci_config_write16(u16 *addr, u16 val);
extern void pci_config_write32(u32 *addr, u32 val);

extern struct pci_ops sun4u_pci_ops;
extern struct pci_ops sun4v_pci_ops;

extern volatile int pci_poke_in_progress;
extern volatile int pci_poke_cpu;
extern volatile int pci_poke_faulted;

#endif /* !(PCI_IMPL_H) */