drivers/vme/vme_bridge.h

   1 #ifndef _VME_BRIDGE_H_
   2 #define _VME_BRIDGE_H_
   3
   4 #include <linux/vme.h>
   5
   6 #define VME_CRCSR_BUF_SIZE (508*1024)
   7 /*
   8  * Resource structures
   9  */
  10 struct vme_master_resource {
  11         struct list_head list;
  12         struct vme_bridge *parent;
  13         /*
  14          * We are likely to need to access the VME bus in interrupt context, so
  15          * protect master routines with a spinlock rather than a mutex.
  16          */
  17         spinlock_t lock;
  18         int locked;
  19         int number;
  20         u32 address_attr;
  21         u32 cycle_attr;
  22         u32 width_attr;
  23         struct resource bus_resource;
  24         void __iomem *kern_base;
  25 };
  26
  27 struct vme_slave_resource {
  28         struct list_head list;
  29         struct vme_bridge *parent;
  30         struct mutex mtx;
  31         int locked;
  32         int number;
  33         u32 address_attr;
  34         u32 cycle_attr;
  35 };
  36
  37 struct vme_dma_pattern {
  38         u32 pattern;
  39         u32 type;
  40 };
  41
  42 struct vme_dma_pci {
  43         dma_addr_t address;
  44 };
  45
  46 struct vme_dma_vme {
  47         unsigned long long address;
  48         u32 aspace;
  49         u32 cycle;
  50         u32 dwidth;
  51 };
  52
  53 struct vme_dma_list {
  54         struct list_head list;
  55         struct vme_dma_resource *parent;
  56         struct list_head entries;
  57         struct mutex mtx;
  58 };
  59
  60 struct vme_dma_resource {
  61         struct list_head list;
  62         struct vme_bridge *parent;
  63         struct mutex mtx;
  64         int locked;
  65         int number;
  66         struct list_head pending;
  67         struct list_head running;
  68         u32 route_attr;
  69 };
  70
  71 struct vme_lm_resource {
  72         struct list_head list;
  73         struct vme_bridge *parent;
  74         struct mutex mtx;
  75         int locked;
  76         int number;
  77         int monitors;
  78 };
  79
  80 struct vme_error_handler {
  81         struct list_head list;
  82         unsigned long long start;       /* Beginning of error window */
  83         unsigned long long end;         /* End of error window */
  84         unsigned long long first_error; /* Address of the first error */
  85         u32 aspace;                     /* Address space of error window*/
  86         unsigned num_errors;            /* Number of errors */
  87 };
  88
  89 struct vme_callback {
  90         void (*func)(int, int, void*);
  91         void *priv_data;
  92 };
  93
  94 struct vme_irq {
  95         int count;
  96         struct vme_callback callback[VME_NUM_STATUSID];
  97 };
  98
  99 /* Allow 16 characters for name (including null character) */
 100 #define VMENAMSIZ 16
 101
 102 /* This structure stores all the information about one bridge
 103  * The structure should be dynamically allocated by the driver and one instance
 104  * of the structure should be present for each VME chip present in the system.
 105  */
 106 struct vme_bridge {
 107         char name[VMENAMSIZ];
 108         int num;
 109         struct list_head master_resources;
 110         struct list_head slave_resources;
 111         struct list_head dma_resources;
 112         struct list_head lm_resources;
 113
 114         /* List for registered errors handlers */
 115         struct list_head vme_error_handlers;
 116         /* List of devices on this bridge */
 117         struct list_head devices;
 118
 119         /* Bridge Info - XXX Move to private structure? */
 120         struct device *parent;  /* Parent device (eg. pdev->dev for PCI) */
 121         void *driver_priv;      /* Private pointer for the bridge driver */
 122         struct list_head bus_list; /* list of VME buses */
 123
 124         /* Interrupt callbacks */
 125         struct vme_irq irq[7];
 126         /* Locking for VME irq callback configuration */
 127         struct mutex irq_mtx;
 128
 129         /* Slave Functions */
 130         int (*slave_get) (struct vme_slave_resource *, int *,
 131                 unsigned long long *, unsigned long long *, dma_addr_t *,
 132                 u32 *, u32 *);
 133         int (*slave_set) (struct vme_slave_resource *, int, unsigned long long,
 134                 unsigned long long, dma_addr_t, u32, u32);
 135
 136         /* Master Functions */
 137         int (*master_get) (struct vme_master_resource *, int *,
 138                 unsigned long long *, unsigned long long *, u32 *, u32 *,
 139                 u32 *);
 140         int (*master_set) (struct vme_master_resource *, int,
 141                 unsigned long long, unsigned long long,  u32, u32, u32);
 142         ssize_t (*master_read) (struct vme_master_resource *, void *, size_t,
 143                 loff_t);
 144         ssize_t (*master_write) (struct vme_master_resource *, void *, size_t,
 145                 loff_t);
 146         unsigned int (*master_rmw) (struct vme_master_resource *, unsigned int,
 147                 unsigned int, unsigned int, loff_t);
 148
 149         /* DMA Functions */
 150         int (*dma_list_add) (struct vme_dma_list *, struct vme_dma_attr *,
 151                 struct vme_dma_attr *, size_t);
 152         int (*dma_list_exec) (struct vme_dma_list *);
 153         int (*dma_list_empty) (struct vme_dma_list *);
 154
 155         /* Interrupt Functions */
 156         void (*irq_set) (struct vme_bridge *, int, int, int);
 157         int (*irq_generate) (struct vme_bridge *, int, int);
 158
 159         /* Location monitor functions */
 160         int (*lm_set) (struct vme_lm_resource *, unsigned long long, u32, u32);
 161         int (*lm_get) (struct vme_lm_resource *, unsigned long long *, u32 *,
 162                 u32 *);
 163         int (*lm_attach)(struct vme_lm_resource *, int,
 164                          void (*callback)(void *), void *);
 165         int (*lm_detach) (struct vme_lm_resource *, int);
 166
 167         /* CR/CSR space functions */
 168         int (*slot_get) (struct vme_bridge *);
 169
 170         /* Bridge parent interface */
 171         void *(*alloc_consistent)(struct device *dev, size_t size,
 172                 dma_addr_t *dma);
 173         void (*free_consistent)(struct device *dev, size_t size,
 174                 void *vaddr, dma_addr_t dma);
 175 };
 176
 177 void vme_bus_error_handler(struct vme_bridge *bridge,
 178                            unsigned long long address, int am);
 179 void vme_irq_handler(struct vme_bridge *, int, int);
 180
 181 struct vme_bridge *vme_init_bridge(struct vme_bridge *);
 182 int vme_register_bridge(struct vme_bridge *);
 183 void vme_unregister_bridge(struct vme_bridge *);
 184 struct vme_error_handler *vme_register_error_handler(
 185         struct vme_bridge *bridge, u32 aspace,
 186         unsigned long long address, size_t len);
 187 void vme_unregister_error_handler(struct vme_error_handler *handler);
 188
 189 #endif /* _VME_BRIDGE_H_ */