rapidio: modify mport ID assignment

Changes mport ID and host destination ID assignment to implement unified
method common to all mport drivers.  Makes "riohdid=" kernel command line
parameter common for all architectures with support for more that one host
destination ID assignment.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 576b806..8d26533 100644 (file)
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -1288,28 +1288,6 @@ err_out:
        return rc;
 }
 
-static char *cmdline = NULL;
-
-static int fsl_rio_get_hdid(int index)
-{
-       /* XXX Need to parse multiple entries in some format */
-       if (!cmdline)
-               return -1;
-
-       return simple_strtol(cmdline, NULL, 0);
-}
-
-static int fsl_rio_get_cmdline(char *s)
-{
-       if (!s)
-               return 0;
-
-       cmdline = s;
-       return 1;
-}
-
-__setup("riohdid=", fsl_rio_get_cmdline);
-
 static inline void fsl_rio_info(struct device *dev, u32 ccsr)
 {
        const char *str;
@@ -1439,7 +1417,6 @@ int fsl_rio_setup(struct platform_device *dev)
                rc = -ENOMEM;
                goto err_port;
        }
-       port->id = 0;
        port->index = 0;
 
        priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
@@ -1470,8 +1447,6 @@ int fsl_rio_setup(struct platform_device *dev)
        priv->dev = &dev->dev;
 
        port->ops = ops;
-       port->host_deviceid = fsl_rio_get_hdid(port->id);
-
        port->priv = priv;
        port->phys_efptr = 0x100;
        rio_register_mport(port);

diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index f861b72..9a7b216 100644 (file)
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -32,6 +32,7 @@
 #include "rio.h"
 
 static LIST_HEAD(rio_mports);
+static unsigned char next_portid;
 
 /**
  * rio_local_get_device_id - Get the base/extended device id for a port
@@ -1164,8 +1165,33 @@ int __devinit rio_init_mports(void)
 
 device_initcall_sync(rio_init_mports);
 
+static int hdids[RIO_MAX_MPORTS + 1];
+
+static int rio_get_hdid(int index)
+{
+       if (!hdids[0] || hdids[0] <= index || index >= RIO_MAX_MPORTS)
+               return -1;
+
+       return hdids[index + 1];
+}
+
+static int rio_hdid_setup(char *str)
+{
+       (void)get_options(str, ARRAY_SIZE(hdids), hdids);
+       return 1;
+}
+
+__setup("riohdid=", rio_hdid_setup);
+
 void rio_register_mport(struct rio_mport *port)
 {
+       if (next_portid >= RIO_MAX_MPORTS) {
+               pr_err("RIO: reached specified max number of mports\n");
+               return;
+       }
+
+       port->id = next_portid++;
+       port->host_deviceid = rio_get_hdid(port->id);
        list_add_tail(&port->node, &rio_mports);
 }
 

diff --git a/include/linux/rio.h b/include/linux/rio.h
index b6bcb16..4e37a7c 100644 (file)
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -24,6 +24,7 @@
 #define RIO_NO_HOPCOUNT                -1
 #define RIO_INVALID_DESTID     0xffff
 
+#define RIO_MAX_MPORTS         8
 #define RIO_MAX_MPORT_RESOURCES        16
 #define RIO_MAX_DEV_RESOURCES  16