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review.trustedfirmware.org / hafnium / third_party / linux / b4b6d4a02fa8aa8187d426b508fb7f3b69df0dcc / . / arch / s390 / include / asm / pci.h
blob: 10fe982f2b4bf9ad1479bee371ecb89ddaaaca9c [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_S390_PCI_H
3#define __ASM_S390_PCI_H
4
5/* must be set before including pci_clp.h */
6#define PCI_BAR_COUNT 6
7
8#include <linux/pci.h>
9#include <linux/mutex.h>
10#include <linux/iommu.h>
11#include <asm-generic/pci.h>
12#include <asm/pci_clp.h>
13#include <asm/pci_debug.h>
14#include <asm/sclp.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
35#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
36
37struct zpci_fmb_fmt0 {
38 u64 dma_rbytes;
39 u64 dma_wbytes;
40};
41
42struct zpci_fmb_fmt1 {
43 u64 rx_bytes;
44 u64 rx_packets;
45 u64 tx_bytes;
46 u64 tx_packets;
47};
48
49struct zpci_fmb_fmt2 {
50 u64 consumed_work_units;
51 u64 max_work_units;
52};
53
54struct zpci_fmb_fmt3 {
55 u64 tx_bytes;
56};
57
58struct zpci_fmb {
59 u32 format : 8;
60 u32 fmt_ind : 24;
61 u32 samples;
62 u64 last_update;
63 /* common counters */
64 u64 ld_ops;
65 u64 st_ops;
66 u64 stb_ops;
67 u64 rpcit_ops;
68 /* format specific counters */
69 union {
70 struct zpci_fmb_fmt0 fmt0;
71 struct zpci_fmb_fmt1 fmt1;
72 struct zpci_fmb_fmt2 fmt2;
73 struct zpci_fmb_fmt3 fmt3;
74 };
75} __packed __aligned(128);
76
77enum zpci_state {
78 ZPCI_FN_STATE_STANDBY = 0,
79 ZPCI_FN_STATE_CONFIGURED = 1,
80 ZPCI_FN_STATE_RESERVED = 2,
81 ZPCI_FN_STATE_ONLINE = 3,
82};
83
84struct zpci_bar_struct {
85 struct resource *res; /* bus resource */
86 u32 val; /* bar start & 3 flag bits */
87 u16 map_idx; /* index into bar mapping array */
88 u8 size; /* order 2 exponent */
89};
90
91struct s390_domain;
92
93/* Private data per function */
94struct zpci_dev {
95 struct pci_bus *bus;
96 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
97
98 enum zpci_state state;
99 u32 fid; /* function ID, used by sclp */
100 u32 fh; /* function handle, used by insn's */
101 u16 vfn; /* virtual function number */
102 u16 pchid; /* physical channel ID */
103 u8 pfgid; /* function group ID */
104 u8 pft; /* pci function type */
105 u16 domain;
106
107 struct mutex lock;
108 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
109 u32 uid; /* user defined id */
110 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
111
112 /* IRQ stuff */
113 u64 msi_addr; /* MSI address */
114 unsigned int max_msi; /* maximum number of MSI's */
115 struct airq_iv *aibv; /* adapter interrupt bit vector */
116 unsigned long aisb; /* number of the summary bit */
117
118 /* DMA stuff */
119 unsigned long *dma_table;
120 spinlock_t dma_table_lock;
121 int tlb_refresh;
122
123 spinlock_t iommu_bitmap_lock;
124 unsigned long *iommu_bitmap;
125 unsigned long *lazy_bitmap;
126 unsigned long iommu_size;
127 unsigned long iommu_pages;
128 unsigned int next_bit;
129
130 struct iommu_device iommu_dev; /* IOMMU core handle */
131
132 char res_name[16];
133 struct zpci_bar_struct bars[PCI_BAR_COUNT];
134
135 u64 start_dma; /* Start of available DMA addresses */
136 u64 end_dma; /* End of available DMA addresses */
137 u64 dma_mask; /* DMA address space mask */
138
139 /* Function measurement block */
140 struct zpci_fmb *fmb;
141 u16 fmb_update; /* update interval */
142 u16 fmb_length;
143 /* software counters */
144 atomic64_t allocated_pages;
145 atomic64_t mapped_pages;
146 atomic64_t unmapped_pages;
147
148 enum pci_bus_speed max_bus_speed;
149
150 struct dentry *debugfs_dev;
151 struct dentry *debugfs_perf;
152
153 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
154};
155
156static inline bool zdev_enabled(struct zpci_dev *zdev)
157{
158 return (zdev->fh & (1UL << 31)) ? true : false;
159}
160
161extern const struct attribute_group *zpci_attr_groups[];
162
163/* -----------------------------------------------------------------------------
164 Prototypes
165----------------------------------------------------------------------------- */
166/* Base stuff */
167int zpci_create_device(struct zpci_dev *);
168void zpci_remove_device(struct zpci_dev *zdev);
169int zpci_enable_device(struct zpci_dev *);
170int zpci_disable_device(struct zpci_dev *);
171int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
172int zpci_unregister_ioat(struct zpci_dev *, u8);
173void zpci_remove_reserved_devices(void);
174
175/* CLP */
176int clp_scan_pci_devices(void);
177int clp_rescan_pci_devices(void);
178int clp_rescan_pci_devices_simple(void);
179int clp_add_pci_device(u32, u32, int);
180int clp_enable_fh(struct zpci_dev *, u8);
181int clp_disable_fh(struct zpci_dev *);
182int clp_get_state(u32 fid, enum zpci_state *state);
183
184/* IOMMU Interface */
185int zpci_init_iommu(struct zpci_dev *zdev);
186void zpci_destroy_iommu(struct zpci_dev *zdev);
187
188#ifdef CONFIG_PCI
189/* Error handling and recovery */
190void zpci_event_error(void *);
191void zpci_event_availability(void *);
192void zpci_rescan(void);
193bool zpci_is_enabled(void);
194#else /* CONFIG_PCI */
195static inline void zpci_event_error(void *e) {}
196static inline void zpci_event_availability(void *e) {}
197static inline void zpci_rescan(void) {}
198#endif /* CONFIG_PCI */
199
200#ifdef CONFIG_HOTPLUG_PCI_S390
201int zpci_init_slot(struct zpci_dev *);
202void zpci_exit_slot(struct zpci_dev *);
203#else /* CONFIG_HOTPLUG_PCI_S390 */
204static inline int zpci_init_slot(struct zpci_dev *zdev)
205{
206 return 0;
207}
208static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
209#endif /* CONFIG_HOTPLUG_PCI_S390 */
210
211/* Helpers */
212static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
213{
214 return pdev->sysdata;
215}
216
217struct zpci_dev *get_zdev_by_fid(u32);
218
219/* DMA */
220int zpci_dma_init(void);
221void zpci_dma_exit(void);
222
223/* FMB */
224int zpci_fmb_enable_device(struct zpci_dev *);
225int zpci_fmb_disable_device(struct zpci_dev *);
226
227/* Debug */
228int zpci_debug_init(void);
229void zpci_debug_exit(void);
230void zpci_debug_init_device(struct zpci_dev *, const char *);
231void zpci_debug_exit_device(struct zpci_dev *);
232void zpci_debug_info(struct zpci_dev *, struct seq_file *);
233
234/* Error reporting */
235int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
236
237#ifdef CONFIG_NUMA
238
239/* Returns the node based on PCI bus */
240static inline int __pcibus_to_node(const struct pci_bus *bus)
241{
242 return NUMA_NO_NODE;
243}
244
245static inline const struct cpumask *
246cpumask_of_pcibus(const struct pci_bus *bus)
247{
248 return cpu_online_mask;
249}
250
251#endif /* CONFIG_NUMA */
252
253#endif