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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 <asm-generic/pci.h>
 11 #include <asm-generic/pci-dma-compat.h>
 12 #include <asm/pci_clp.h>
 13 #include <asm/pci_debug.h>
 14 
 15 #define PCIBIOS_MIN_IO          0x1000
 16 #define PCIBIOS_MIN_MEM         0x10000000
 17 
 18 #define pcibios_assign_all_busses()     (0)
 19 
 20 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
 21 void pci_iounmap(struct pci_dev *, void __iomem *);
 22 int pci_domain_nr(struct pci_bus *);
 23 int pci_proc_domain(struct pci_bus *);
 24 
 25 #define ZPCI_BUS_NR                     0       /* default bus number */
 26 #define ZPCI_DEVFN                      0       /* default device number */
 27 
 28 /* PCI Function Controls */
 29 #define ZPCI_FC_FN_ENABLED              0x80
 30 #define ZPCI_FC_ERROR                   0x40
 31 #define ZPCI_FC_BLOCKED                 0x20
 32 #define ZPCI_FC_DMA_ENABLED             0x10
 33 
 34 struct zpci_fmb {
 35         u32 format      :  8;
 36         u32 dma_valid   :  1;
 37         u32             : 23;
 38         u32 samples;
 39         u64 last_update;
 40         /* hardware counters */
 41         u64 ld_ops;
 42         u64 st_ops;
 43         u64 stb_ops;
 44         u64 rpcit_ops;
 45         u64 dma_rbytes;
 46         u64 dma_wbytes;
 47         /* software counters */
 48         atomic64_t allocated_pages;
 49         atomic64_t mapped_pages;
 50         atomic64_t unmapped_pages;
 51 } __packed __aligned(16);
 52 
 53 #define ZPCI_MSI_VEC_BITS       11
 54 #define ZPCI_MSI_VEC_MAX        (1 << ZPCI_MSI_VEC_BITS)
 55 #define ZPCI_MSI_VEC_MASK       (ZPCI_MSI_VEC_MAX - 1)
 56 
 57 enum zpci_state {
 58         ZPCI_FN_STATE_RESERVED,
 59         ZPCI_FN_STATE_STANDBY,
 60         ZPCI_FN_STATE_CONFIGURED,
 61         ZPCI_FN_STATE_ONLINE,
 62         NR_ZPCI_FN_STATES,
 63 };
 64 
 65 struct zpci_bar_struct {
 66         struct resource *res;           /* bus resource */
 67         u32             val;            /* bar start & 3 flag bits */
 68         u16             map_idx;        /* index into bar mapping array */
 69         u8              size;           /* order 2 exponent */
 70 };
 71 
 72 /* Private data per function */
 73 struct zpci_dev {
 74         struct pci_dev  *pdev;
 75         struct pci_bus  *bus;
 76         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
 77 
 78         enum zpci_state state;
 79         u32             fid;            /* function ID, used by sclp */
 80         u32             fh;             /* function handle, used by insn's */
 81         u16             pchid;          /* physical channel ID */
 82         u8              pfgid;          /* function group ID */
 83         u16             domain;
 84 
 85         /* IRQ stuff */
 86         u64             msi_addr;       /* MSI address */
 87         struct airq_iv *aibv;           /* adapter interrupt bit vector */
 88         unsigned int    aisb;           /* number of the summary bit */
 89 
 90         /* DMA stuff */
 91         unsigned long   *dma_table;
 92         spinlock_t      dma_table_lock;
 93         int             tlb_refresh;
 94 
 95         spinlock_t      iommu_bitmap_lock;
 96         unsigned long   *iommu_bitmap;
 97         unsigned long   iommu_size;
 98         unsigned long   iommu_pages;
 99         unsigned int    next_bit;
100 
101         char res_name[16];
102         struct zpci_bar_struct bars[PCI_BAR_COUNT];
103 
104         u64             start_dma;      /* Start of available DMA addresses */
105         u64             end_dma;        /* End of available DMA addresses */
106         u64             dma_mask;       /* DMA address space mask */
107 
108         /* Function measurement block */
109         struct zpci_fmb *fmb;
110         u16             fmb_update;     /* update interval */
111 
112         enum pci_bus_speed max_bus_speed;
113 
114         struct dentry   *debugfs_dev;
115         struct dentry   *debugfs_perf;
116 };
117 
118 static inline bool zdev_enabled(struct zpci_dev *zdev)
119 {
120         return (zdev->fh & (1UL << 31)) ? true : false;
121 }
122 
123 /* -----------------------------------------------------------------------------
124   Prototypes
125 ----------------------------------------------------------------------------- */
126 /* Base stuff */
127 int zpci_create_device(struct zpci_dev *);
128 int zpci_enable_device(struct zpci_dev *);
129 int zpci_disable_device(struct zpci_dev *);
130 void zpci_stop_device(struct zpci_dev *);
131 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
132 int zpci_unregister_ioat(struct zpci_dev *, u8);
133 
134 /* CLP */
135 int clp_scan_pci_devices(void);
136 int clp_rescan_pci_devices(void);
137 int clp_rescan_pci_devices_simple(void);
138 int clp_add_pci_device(u32, u32, int);
139 int clp_enable_fh(struct zpci_dev *, u8);
140 int clp_disable_fh(struct zpci_dev *);
141 
142 #ifdef CONFIG_PCI
143 /* Error handling and recovery */
144 void zpci_event_error(void *);
145 void zpci_event_availability(void *);
146 void zpci_rescan(void);
147 bool zpci_is_enabled(void);
148 #else /* CONFIG_PCI */
149 static inline void zpci_event_error(void *e) {}
150 static inline void zpci_event_availability(void *e) {}
151 static inline void zpci_rescan(void) {}
152 #endif /* CONFIG_PCI */
153 
154 #ifdef CONFIG_HOTPLUG_PCI_S390
155 int zpci_init_slot(struct zpci_dev *);
156 void zpci_exit_slot(struct zpci_dev *);
157 #else /* CONFIG_HOTPLUG_PCI_S390 */
158 static inline int zpci_init_slot(struct zpci_dev *zdev)
159 {
160         return 0;
161 }
162 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
163 #endif /* CONFIG_HOTPLUG_PCI_S390 */
164 
165 /* Helpers */
166 struct zpci_dev *get_zdev(struct pci_dev *);
167 struct zpci_dev *get_zdev_by_fid(u32);
168 
169 /* sysfs */
170 int zpci_sysfs_add_device(struct device *);
171 void zpci_sysfs_remove_device(struct device *);
172 
173 /* DMA */
174 int zpci_dma_init(void);
175 void zpci_dma_exit(void);
176 
177 /* FMB */
178 int zpci_fmb_enable_device(struct zpci_dev *);
179 int zpci_fmb_disable_device(struct zpci_dev *);
180 
181 /* Debug */
182 int zpci_debug_init(void);
183 void zpci_debug_exit(void);
184 void zpci_debug_init_device(struct zpci_dev *);
185 void zpci_debug_exit_device(struct zpci_dev *);
186 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
187 
188 #endif
189 

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