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Linux/arch/s390/include/asm/pci.h

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  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 
 21 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
 22 void pci_iounmap(struct pci_dev *, void __iomem *);
 23 int pci_domain_nr(struct pci_bus *);
 24 int 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 struct 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 
 50 enum 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 
 58 struct 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 */
 66 struct 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 
123 static inline bool zdev_enabled(struct zpci_dev *zdev)
124 {
125         return (zdev->fh & (1UL << 31)) ? true : false;
126 }
127 
128 extern const struct attribute_group *zpci_attr_groups[];
129 
130 /* -----------------------------------------------------------------------------
131   Prototypes
132 ----------------------------------------------------------------------------- */
133 /* Base stuff */
134 int zpci_create_device(struct zpci_dev *);
135 int zpci_enable_device(struct zpci_dev *);
136 int zpci_disable_device(struct zpci_dev *);
137 void zpci_stop_device(struct zpci_dev *);
138 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
139 int zpci_unregister_ioat(struct zpci_dev *, u8);
140 
141 /* CLP */
142 int clp_scan_pci_devices(void);
143 int clp_rescan_pci_devices(void);
144 int clp_rescan_pci_devices_simple(void);
145 int clp_add_pci_device(u32, u32, int);
146 int clp_enable_fh(struct zpci_dev *, u8);
147 int clp_disable_fh(struct zpci_dev *);
148 
149 #ifdef CONFIG_PCI
150 /* Error handling and recovery */
151 void zpci_event_error(void *);
152 void zpci_event_availability(void *);
153 void zpci_rescan(void);
154 bool zpci_is_enabled(void);
155 #else /* CONFIG_PCI */
156 static inline void zpci_event_error(void *e) {}
157 static inline void zpci_event_availability(void *e) {}
158 static inline void zpci_rescan(void) {}
159 #endif /* CONFIG_PCI */
160 
161 #ifdef CONFIG_HOTPLUG_PCI_S390
162 int zpci_init_slot(struct zpci_dev *);
163 void zpci_exit_slot(struct zpci_dev *);
164 #else /* CONFIG_HOTPLUG_PCI_S390 */
165 static inline int zpci_init_slot(struct zpci_dev *zdev)
166 {
167         return 0;
168 }
169 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
170 #endif /* CONFIG_HOTPLUG_PCI_S390 */
171 
172 /* Helpers */
173 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
174 {
175         return pdev->sysdata;
176 }
177 
178 struct zpci_dev *get_zdev_by_fid(u32);
179 
180 /* DMA */
181 int zpci_dma_init(void);
182 void zpci_dma_exit(void);
183 
184 /* FMB */
185 int zpci_fmb_enable_device(struct zpci_dev *);
186 int zpci_fmb_disable_device(struct zpci_dev *);
187 
188 /* Debug */
189 int zpci_debug_init(void);
190 void zpci_debug_exit(void);
191 void zpci_debug_init_device(struct zpci_dev *);
192 void zpci_debug_exit_device(struct zpci_dev *);
193 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
194 
195 #ifdef CONFIG_NUMA
196 
197 /* Returns the node based on PCI bus */
198 static inline int __pcibus_to_node(const struct pci_bus *bus)
199 {
200         return NUMA_NO_NODE;
201 }
202 
203 static inline const struct cpumask *
204 cpumask_of_pcibus(const struct pci_bus *bus)
205 {
206         return cpu_online_mask;
207 }
208 
209 #endif /* CONFIG_NUMA */
210 
211 #endif
212 

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