[SPARC64]: Abstract out mdesc accesses for better MD update handling.
Since we have to be able to handle MD updates, having an in-tree
set of data structures representing the MD objects actually makes
things more painful.
The MD itself is easy to parse, and we can implement the existing
interfaces using direct parsing of the MD binary image.
The MD is now reference counted, so accesses have to now take the
form:
handle = mdesc_grab();
... operations on MD ...
mdesc_release(handle);
The only remaining issue are cases where code holds on to references
to MD property values. mdesc_get_property() returns a direct pointer
to the property value, most cases just pull in the information they
need and discard the pointer, but there are few that use the pointer
directly over a long lifetime. Those will be fixed up in a subsequent
changeset.
A preliminary handler for MD update events from domain services is
there, it is rudimentry but it works and handles all of the reference
counting. It does not check the generation number of the MDs,
and it does not generate a "add/delete" list for notification to
interesting parties about MD changes but that will be forthcoming.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/asm-sparc64/vio.h b/include/asm-sparc64/vio.h
index 47c3da7..a8a53e6 100644
--- a/include/asm-sparc64/vio.h
+++ b/include/asm-sparc64/vio.h
@@ -265,13 +265,18 @@
}
struct vio_dev {
- struct mdesc_node *mp;
+ u64 mp;
struct device_node *dp;
const char *type;
const char *compat;
int compat_len;
+ unsigned long channel_id;
+
+ unsigned int tx_irq;
+ unsigned int rx_irq;
+
struct device dev;
};
@@ -345,16 +350,10 @@
struct vio_dev *vdev;
- unsigned long channel_id;
- unsigned int tx_irq;
- unsigned int rx_irq;
-
struct timer_list timer;
struct vio_version ver;
- struct mdesc_node *endpoint;
-
struct vio_version *ver_table;
int ver_table_entries;
@@ -365,7 +364,8 @@
#define viodbg(TYPE, f, a...) \
do { if (vio->debug & VIO_DEBUG_##TYPE) \
- printk(KERN_INFO "vio: ID[%lu] " f, vio->channel_id, ## a); \
+ printk(KERN_INFO "vio: ID[%lu] " f, \
+ vio->vdev->channel_id, ## a); \
} while (0)
extern int vio_register_driver(struct vio_driver *drv);
@@ -392,11 +392,10 @@
struct ldc_channel_config *base_cfg, void *event_arg);
extern void vio_ldc_free(struct vio_driver_state *vio);
extern int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
- u8 dev_class, struct mdesc_node *channel_endpoint,
- struct vio_version *ver_table, int ver_table_size,
- struct vio_driver_ops *ops, char *name);
+ u8 dev_class, struct vio_version *ver_table,
+ int ver_table_size, struct vio_driver_ops *ops,
+ char *name);
-extern struct mdesc_node *vio_find_endpoint(struct vio_dev *vdev);
extern void vio_port_up(struct vio_driver_state *vio);
#endif /* _SPARC64_VIO_H */