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

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