ieee1394: extend lowlevel API for address range properties
Host adapter hardware imposes certain restrictions and features on
address ranges. Instead of hard-wire such ranges into the ieee1394
core or even into protocol drivers, let lowlevel drivers specify
these ranges via struct hpsb_host.
Patch "ohci1394: set address range properties" must be applied too,
else hpsb_allocate_and_register_addrspace() won't work properly.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
diff --git a/drivers/ieee1394/highlevel.c b/drivers/ieee1394/highlevel.c
index 491e603..29c5255 100644
--- a/drivers/ieee1394/highlevel.c
+++ b/drivers/ieee1394/highlevel.c
@@ -312,8 +312,10 @@
return retval;
}
+ /* default range,
+ * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
if (start == ~0ULL && end == ~0ULL) {
- start = CSR1212_ALL_SPACE_BASE + 0xffff00000000ULL; /* ohci1394.c limit */
+ start = host->middle_addr_space;
end = CSR1212_ALL_SPACE_END;
}
diff --git a/drivers/ieee1394/hosts.h b/drivers/ieee1394/hosts.h
index 9ddc662..9ad4b24 100644
--- a/drivers/ieee1394/hosts.h
+++ b/drivers/ieee1394/hosts.h
@@ -73,6 +73,8 @@
unsigned int config_roms;
struct list_head addr_space;
+ u64 low_addr_space; /* upper bound of physical DMA area */
+ u64 middle_addr_space; /* upper bound of posted write area */
};