rapidio: add udev notification

Add RapidIO-specific modalias generation to enable udev notifications
about RapidIO-specific events.

The RapidIO modalias string format is shown below:

"rapidio:vNNNNdNNNNavNNNNadNNNN"

Where:
v  - Device Vendor ID (16 bit),
d  - Device ID (16 bit),
av - Assembly Vendor ID (16 bit),
ad - Assembly ID (16 bit),

as they are reported in corresponding Capability Registers (CARs)
of each RapidIO device.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@Prodrive.nl>
Cc: Micha Nelissen <micha.nelissen@Prodrive.nl>
Cc: Stef van Os <stef.van.os@Prodrive.nl>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 45f9a3377dcd..d9e67b719f08 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1145,6 +1145,26 @@ static int do_mei_entry(const char *filename, void *symval,
 }
 ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
 
+/* Looks like: rapidio:vNdNavNadN */
+static int do_rio_entry(const char *filename,
+                        void *symval, char *alias)
+{
+        DEF_FIELD(symval, rio_device_id, did);
+        DEF_FIELD(symval, rio_device_id, vid);
+        DEF_FIELD(symval, rio_device_id, asm_did);
+        DEF_FIELD(symval, rio_device_id, asm_vid);
+
+        strcpy(alias, "rapidio:");
+        ADD(alias, "v", vid != RIO_ANY_ID, vid);
+        ADD(alias, "d", did != RIO_ANY_ID, did);
+        ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
+        ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
+
+        add_wildcard(alias);
+        return 1;
+}
+ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
+
 /* Does namelen bytes of name exactly match the symbol? */
 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
 {