1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _VME_BRIDGE_H_ 3 #define _VME_BRIDGE_H_ 4 5 #include "vme.h" 6 7 #define VME_CRCSR_BUF_SIZE (508 * 1024) 8 /* 9 * Resource structures 10 */ 11 struct vme_master_resource { 12 struct list_head list; 13 struct vme_bridge *parent; 14 /* 15 * We are likely to need to access the VME bus in interrupt context, so 16 * protect master routines with a spinlock rather than a mutex. 17 */ 18 spinlock_t lock; 19 int locked; 20 int number; 21 u32 address_attr; 22 u32 cycle_attr; 23 u32 width_attr; 24 struct resource bus_resource; 25 void __iomem *kern_base; 26 }; 27 28 struct vme_slave_resource { 29 struct list_head list; 30 struct vme_bridge *parent; 31 struct mutex mtx; 32 int locked; 33 int number; 34 u32 address_attr; 35 u32 cycle_attr; 36 }; 37 38 struct vme_dma_pattern { 39 u32 pattern; 40 u32 type; 41 }; 42 43 struct vme_dma_pci { 44 dma_addr_t address; 45 }; 46 47 struct vme_dma_vme { 48 unsigned long long address; 49 u32 aspace; 50 u32 cycle; 51 u32 dwidth; 52 }; 53 54 struct vme_dma_list { 55 struct list_head list; 56 struct vme_dma_resource *parent; 57 struct list_head entries; 58 struct mutex mtx; 59 }; 60 61 struct vme_dma_resource { 62 struct list_head list; 63 struct vme_bridge *parent; 64 struct mutex mtx; 65 int locked; 66 int number; 67 struct list_head pending; 68 struct list_head running; 69 u32 route_attr; 70 }; 71 72 struct vme_lm_resource { 73 struct list_head list; 74 struct vme_bridge *parent; 75 struct mutex mtx; 76 int locked; 77 int number; 78 int monitors; 79 }; 80 81 struct vme_error_handler { 82 struct list_head list; 83 unsigned long long start; /* Beginning of error window */ 84 unsigned long long end; /* End of error window */ 85 unsigned long long first_error; /* Address of the first error */ 86 u32 aspace; /* Address space of error window*/ 87 unsigned int num_errors; /* Number of errors */ 88 }; 89 90 struct vme_callback { 91 void (*func)(int, int, void*); 92 void *priv_data; 93 }; 94 95 struct vme_irq { 96 int count; 97 struct vme_callback callback[VME_NUM_STATUSID]; 98 }; 99 100 /* Allow 16 characters for name (including null character) */ 101 #define VMENAMSIZ 16 102 103 /* This structure stores all the information about one bridge 104 * The structure should be dynamically allocated by the driver and one instance 105 * of the structure should be present for each VME chip present in the system. 106 */ 107 struct vme_bridge { 108 char name[VMENAMSIZ]; 109 int num; 110 struct list_head master_resources; 111 struct list_head slave_resources; 112 struct list_head dma_resources; 113 struct list_head lm_resources; 114 115 /* List for registered errors handlers */ 116 struct list_head vme_error_handlers; 117 /* List of devices on this bridge */ 118 struct list_head devices; 119 120 /* Bridge Info - XXX Move to private structure? */ 121 struct device *parent; /* Parent device (eg. pdev->dev for PCI) */ 122 void *driver_priv; /* Private pointer for the bridge driver */ 123 struct list_head bus_list; /* list of VME buses */ 124 125 /* Interrupt callbacks */ 126 struct vme_irq irq[7]; 127 /* Locking for VME irq callback configuration */ 128 struct mutex irq_mtx; 129 130 /* Slave Functions */ 131 int (*slave_get)(struct vme_slave_resource *image, int *enabled, 132 unsigned long long *vme_base, unsigned long long *size, 133 dma_addr_t *buf_base, u32 *aspace, u32 *cycle); 134 int (*slave_set)(struct vme_slave_resource *image, int enabled, 135 unsigned long long vme_base, unsigned long long size, 136 dma_addr_t buf_base, u32 aspace, u32 cycle); 137 138 /* Master Functions */ 139 int (*master_get)(struct vme_master_resource *image, int *enabled, 140 unsigned long long *vme_base, unsigned long long *size, 141 u32 *aspace, u32 *cycle, u32 *dwidth); 142 int (*master_set)(struct vme_master_resource *image, int enabled, 143 unsigned long long vme_base, unsigned long long size, 144 u32 aspace, u32 cycle, u32 dwidth); 145 ssize_t (*master_read)(struct vme_master_resource *image, void *buf, 146 size_t count, loff_t offset); 147 ssize_t (*master_write)(struct vme_master_resource *image, void *buf, 148 size_t count, loff_t offset); 149 unsigned int (*master_rmw)(struct vme_master_resource *image, 150 unsigned int mask, unsigned int compare, 151 unsigned int swap, loff_t offset); 152 153 /* DMA Functions */ 154 int (*dma_list_add)(struct vme_dma_list *list, struct vme_dma_attr *src, 155 struct vme_dma_attr *dest, size_t count); 156 int (*dma_list_exec)(struct vme_dma_list *list); 157 int (*dma_list_empty)(struct vme_dma_list *list); 158 159 /* Interrupt Functions */ 160 void (*irq_set)(struct vme_bridge *bridge, int level, int state, int sync); 161 int (*irq_generate)(struct vme_bridge *bridge, int level, int statid); 162 163 /* Location monitor functions */ 164 int (*lm_set)(struct vme_lm_resource *lm, unsigned long long lm_base, 165 u32 aspace, u32 cycle); 166 int (*lm_get)(struct vme_lm_resource *lm, unsigned long long *lm_base, 167 u32 *aspace, u32 *cycle); 168 int (*lm_attach)(struct vme_lm_resource *lm, int monitor, 169 void (*callback)(void *), void *data); 170 int (*lm_detach)(struct vme_lm_resource *lm, int monitor); 171 172 /* CR/CSR space functions */ 173 int (*slot_get)(struct vme_bridge *bridge); 174 175 /* Bridge parent interface */ 176 void *(*alloc_consistent)(struct device *dev, size_t size, dma_addr_t *dma); 177 void (*free_consistent)(struct device *dev, size_t size, void *vaddr, dma_addr_t dma); 178 }; 179 180 void vme_bus_error_handler(struct vme_bridge *bridge, unsigned long long address, int am); 181 void vme_irq_handler(struct vme_bridge *, int, int); 182 183 struct vme_bridge *vme_init_bridge(struct vme_bridge *); 184 int vme_register_bridge(struct vme_bridge *); 185 void vme_unregister_bridge(struct vme_bridge *); 186 struct vme_error_handler *vme_register_error_handler(struct vme_bridge *bridge, u32 aspace, 187 unsigned long long address, size_t len); 188 void vme_unregister_error_handler(struct vme_error_handler *handler); 189 190 #endif /* _VME_BRIDGE_H_ */ 191