TrustedFirmware Git Browser
Code Review Sign In
review.trustedfirmware.org / hafnium / third_party / linux.git / 157378f43faad830e4aa3815bde5fa9f9a9f5be6 / . / arch / sparc / kernel / pci_impl.h
blob: 4e3d15189fa95f10a2e8e8ba4212820979938686 [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
2/* pci_impl.h: Helper definitions for PCI controller support.
3 *
4 * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
5 */
6
7#ifndef PCI_IMPL_H
8#define PCI_IMPL_H
9
10#include <linux/types.h>
11#include <linux/spinlock.h>
12#include <linux/pci.h>
13#include <linux/msi.h>
14#include <linux/of_device.h>
15#include <asm/io.h>
16#include <asm/prom.h>
17#include <asm/iommu.h>
18
19/* The abstraction used here is that there are PCI controllers,
20 * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
21 * underneath. Each PCI bus module uses an IOMMU (shared by both
22 * PBMs of a controller, or per-PBM), and if a streaming buffer
23 * is present, each PCI bus module has it's own. (ie. the IOMMU
24 * might be shared between PBMs, the STC is never shared)
25 * Furthermore, each PCI bus module controls it's own autonomous
26 * PCI bus.
27 */
28
29#define PCI_STC_FLUSHFLAG_INIT(STC) \
30 (*((STC)->strbuf_flushflag) = 0UL)
31#define PCI_STC_FLUSHFLAG_SET(STC) \
32 (*((STC)->strbuf_flushflag) != 0UL)
33
34#ifdef CONFIG_PCI_MSI
35struct pci_pbm_info;
36struct sparc64_msiq_ops {
37 int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
38 unsigned long *head);
39 int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid,
40 unsigned long *head, unsigned long *msi);
41 int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid,
42 unsigned long head);
43 int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid,
44 unsigned long msi, int is_msi64);
45 int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi);
46 int (*msiq_alloc)(struct pci_pbm_info *pbm);
47 void (*msiq_free)(struct pci_pbm_info *pbm);
48 int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid,
49 unsigned long devino);
50};
51
52void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
53 const struct sparc64_msiq_ops *ops);
54
55struct sparc64_msiq_cookie {
56 struct pci_pbm_info *pbm;
57 unsigned long msiqid;
58};
59#endif
60
61struct pci_pbm_info {
62 struct pci_pbm_info *next;
63 struct pci_pbm_info *sibling;
64 int index;
65
66 /* Physical address base of controller registers. */
67 unsigned long controller_regs;
68
69 /* Physical address base of PBM registers. */
70 unsigned long pbm_regs;
71
72 /* Physical address of DMA sync register, if any. */
73 unsigned long sync_reg;
74
75 /* Opaque 32-bit system bus Port ID. */
76 u32 portid;
77
78 /* Opaque 32-bit handle used for hypervisor calls. */
79 u32 devhandle;
80
81 /* Chipset version information. */
82 int chip_type;
83#define PBM_CHIP_TYPE_SABRE 1
84#define PBM_CHIP_TYPE_PSYCHO 2
85#define PBM_CHIP_TYPE_SCHIZO 3
86#define PBM_CHIP_TYPE_SCHIZO_PLUS 4
87#define PBM_CHIP_TYPE_TOMATILLO 5
88 int chip_version;
89 int chip_revision;
90
91 /* Name used for top-level resources. */
92 const char *name;
93
94 /* OBP specific information. */
95 struct platform_device *op;
96 u64 ino_bitmap;
97
98 /* PBM I/O and Memory space resources. */
99 struct resource io_space;
100 struct resource mem_space;
101 struct resource mem64_space;
102 struct resource busn;
103 /* offset */
104 resource_size_t io_offset;
105 resource_size_t mem_offset;
106 resource_size_t mem64_offset;
107
108 /* Base of PCI Config space, can be per-PBM or shared. */
109 unsigned long config_space;
110
111 /* This will be 12 on PCI-E controllers, 8 elsewhere. */
112 unsigned long config_space_reg_bits;
113
114 unsigned long pci_afsr;
115 unsigned long pci_afar;
116 unsigned long pci_csr;
117
118 /* State of 66MHz capabilities on this PBM. */
119 int is_66mhz_capable;
120 int all_devs_66mhz;
121
122#ifdef CONFIG_PCI_MSI
123 /* MSI info. */
124 u32 msiq_num;
125 u32 msiq_ent_count;
126 u32 msiq_first;
127 u32 msiq_first_devino;
128 u32 msiq_rotor;
129 struct sparc64_msiq_cookie *msiq_irq_cookies;
130 u32 msi_num;
131 u32 msi_first;
132 u32 msi_data_mask;
133 u32 msix_data_width;
134 u64 msi32_start;
135 u64 msi64_start;
136 u32 msi32_len;
137 u32 msi64_len;
138 void *msi_queues;
139 unsigned long *msi_bitmap;
140 unsigned int *msi_irq_table;
141 int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev,
142 struct msi_desc *entry);
143 void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev);
144 const struct sparc64_msiq_ops *msi_ops;
145#endif /* !(CONFIG_PCI_MSI) */
146
147 /* This PBM's streaming buffer. */
148 struct strbuf stc;
149
150 /* IOMMU state, potentially shared by both PBM segments. */
151 struct iommu *iommu;
152
153 /* Now things for the actual PCI bus probes. */
154 unsigned int pci_first_busno;
155 unsigned int pci_last_busno;
156 struct pci_bus *pci_bus;
157 struct pci_ops *pci_ops;
158
159 int numa_node;
160};
161
162extern struct pci_pbm_info *pci_pbm_root;
163
164extern int pci_num_pbms;
165
166/* PCI bus scanning and fixup support. */
167void pci_get_pbm_props(struct pci_pbm_info *pbm);
168struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
169 struct device *parent);
170void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
171
172/* Error reporting support. */
173void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
174void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
175void pci_scan_for_parity_error(struct pci_pbm_info *, struct pci_bus *);
176
177/* Configuration space access. */
178void pci_config_read8(u8 *addr, u8 *ret);
179void pci_config_read16(u16 *addr, u16 *ret);
180void pci_config_read32(u32 *addr, u32 *ret);
181void pci_config_write8(u8 *addr, u8 val);
182void pci_config_write16(u16 *addr, u16 val);
183void pci_config_write32(u32 *addr, u32 val);
184
185extern struct pci_ops sun4u_pci_ops;
186extern struct pci_ops sun4v_pci_ops;
187
188extern volatile int pci_poke_in_progress;
189extern volatile int pci_poke_cpu;
190extern volatile int pci_poke_faulted;
191
192#endif /* !(PCI_IMPL_H) */