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path: root/drivers/vme/vme.c
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Diffstat (limited to 'drivers/vme/vme.c')
-rw-r--r--drivers/vme/vme.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index 56708915ebbe..72924b0632b7 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -223,6 +223,39 @@ int vme_check_window(u32 aspace, unsigned long long vme_base,
}
EXPORT_SYMBOL(vme_check_window);
+static u32 vme_get_aspace(int am)
+{
+ switch (am) {
+ case 0x29:
+ case 0x2D:
+ return VME_A16;
+ case 0x38:
+ case 0x39:
+ case 0x3A:
+ case 0x3B:
+ case 0x3C:
+ case 0x3D:
+ case 0x3E:
+ case 0x3F:
+ return VME_A24;
+ case 0x8:
+ case 0x9:
+ case 0xA:
+ case 0xB:
+ case 0xC:
+ case 0xD:
+ case 0xE:
+ case 0xF:
+ return VME_A32;
+ case 0x0:
+ case 0x1:
+ case 0x3:
+ return VME_A64;
+ }
+
+ return 0;
+}
+
/*
* Request a slave image with specific attributes, return some unique
* identifier.
@@ -990,6 +1023,63 @@ int vme_dma_free(struct vme_resource *resource)
}
EXPORT_SYMBOL(vme_dma_free);
+void vme_bus_error_handler(struct vme_bridge *bridge,
+ unsigned long long address, int am)
+{
+ struct list_head *handler_pos = NULL;
+ struct vme_error_handler *handler;
+ int handler_triggered = 0;
+ u32 aspace = vme_get_aspace(am);
+
+ list_for_each(handler_pos, &bridge->vme_error_handlers) {
+ handler = list_entry(handler_pos, struct vme_error_handler,
+ list);
+ if ((aspace == handler->aspace) &&
+ (address >= handler->start) &&
+ (address < handler->end)) {
+ if (!handler->num_errors)
+ handler->first_error = address;
+ if (handler->num_errors != UINT_MAX)
+ handler->num_errors++;
+ handler_triggered = 1;
+ }
+ }
+
+ if (!handler_triggered)
+ dev_err(bridge->parent,
+ "Unhandled VME access error at address 0x%llx\n",
+ address);
+}
+EXPORT_SYMBOL(vme_bus_error_handler);
+
+struct vme_error_handler *vme_register_error_handler(
+ struct vme_bridge *bridge, u32 aspace,
+ unsigned long long address, size_t len)
+{
+ struct vme_error_handler *handler;
+
+ handler = kmalloc(sizeof(*handler), GFP_KERNEL);
+ if (!handler)
+ return NULL;
+
+ handler->aspace = aspace;
+ handler->start = address;
+ handler->end = address + len;
+ handler->num_errors = 0;
+ handler->first_error = 0;
+ list_add_tail(&handler->list, &bridge->vme_error_handlers);
+
+ return handler;
+}
+EXPORT_SYMBOL(vme_register_error_handler);
+
+void vme_unregister_error_handler(struct vme_error_handler *handler)
+{
+ list_del(&handler->list);
+ kfree(handler);
+}
+EXPORT_SYMBOL(vme_unregister_error_handler);
+
void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
{
void (*call)(int, int, void *);