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authorDmitry Kalinkin <dmitry.kalinkin@gmail.com>2015-09-17 23:01:42 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-04 18:50:57 (GMT)
commite2c6393fda98dde5534dd6f83bd15f76abed6555 (patch)
tree73f94bb441c10040c6527b07c86e74d4a2eb1b37 /drivers/vme/vme.c
parentda5ae8a991d35d73b3875de0298afaf033d85363 (diff)
downloadlinux-e2c6393fda98dde5534dd6f83bd15f76abed6555.tar.xz
vme: move tsi148 error handling into VME subsystem
Error handling code found in tsi148 is not device specific. In fact it already relies on shared vme_bus_error struct and vme_bridge.vme_errors field. The other bridge driver could reuse this code if it is shared. This introduces a slight behavior change: vme error message won't be triggered in a rare case when err_chk=1 and kmalloc fails. Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com> Cc: Igor Alekseev <igor.alekseev@itep.ru> Acked-by: Martyn Welch <martyn@welchs.me.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/vme/vme.c')
-rw-r--r--drivers/vme/vme.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index 5670891..6803744 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -990,6 +990,92 @@ 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, u32 attributes)
+{
+ struct vme_bus_error *error;
+
+ error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC);
+ if (error) {
+ error->address = address;
+ error->attributes = attributes;
+ list_add_tail(&error->list, &bridge->vme_errors);
+ } else {
+ dev_err(bridge->parent,
+ "Unable to alloc memory for VMEbus Error reporting\n");
+ }
+}
+EXPORT_SYMBOL(vme_bus_error_handler);
+
+/*
+ * Find the first error in this address range
+ */
+struct vme_bus_error *vme_find_error(struct vme_bridge *bridge, u32 aspace,
+ unsigned long long address, size_t count)
+{
+ struct list_head *err_pos;
+ struct vme_bus_error *vme_err, *valid = NULL;
+ unsigned long long bound;
+
+ bound = address + count;
+
+ /*
+ * XXX We are currently not looking at the address space when parsing
+ * for errors. This is because parsing the Address Modifier Codes
+ * is going to be quite resource intensive to do properly. We
+ * should be OK just looking at the addresses and this is certainly
+ * much better than what we had before.
+ */
+ err_pos = NULL;
+ /* Iterate through errors */
+ list_for_each(err_pos, &bridge->vme_errors) {
+ vme_err = list_entry(err_pos, struct vme_bus_error, list);
+ if ((vme_err->address >= address) &&
+ (vme_err->address < bound)) {
+
+ valid = vme_err;
+ break;
+ }
+ }
+
+ return valid;
+}
+EXPORT_SYMBOL(vme_find_error);
+
+/*
+ * Clear errors in the provided address range.
+ */
+void vme_clear_errors(struct vme_bridge *bridge, u32 aspace,
+ unsigned long long address, size_t count)
+{
+ struct list_head *err_pos, *temp;
+ struct vme_bus_error *vme_err;
+ unsigned long long bound;
+
+ bound = address + count;
+
+ /*
+ * XXX We are currently not looking at the address space when parsing
+ * for errors. This is because parsing the Address Modifier Codes
+ * is going to be quite resource intensive to do properly. We
+ * should be OK just looking at the addresses and this is certainly
+ * much better than what we had before.
+ */
+ err_pos = NULL;
+ /* Iterate through errors */
+ list_for_each_safe(err_pos, temp, &bridge->vme_errors) {
+ vme_err = list_entry(err_pos, struct vme_bus_error, list);
+
+ if ((vme_err->address >= address) &&
+ (vme_err->address < bound)) {
+
+ list_del(err_pos);
+ kfree(vme_err);
+ }
+ }
+}
+EXPORT_SYMBOL(vme_clear_errors);
+
void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
{
void (*call)(int, int, void *);