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