rapidio: add architecture specific callbacks

This set of patches eliminates RapidIO dependency on PowerPC architecture
and makes it available to other architectures (x86 and MIPS).  It also
enables support of new platform independent RapidIO controllers such as
PCI-to-SRIO and PCI Express-to-SRIO.

This patch:

Extend number of mport callback functions to eliminate direct linking of
architecture specific mport operations.

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>

1 files changed, 26 insertions, 12 deletions

diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index cc2a3b74d0f0..d520dbaede80 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -68,9 +68,13 @@ int rio_request_inb_mbox(struct rio_mport *mport,
 			 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
 				       int slot))
 {
-	int rc = 0;
+	int rc = -ENOSYS;
+	struct resource *res;
 
-	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+	if (mport->ops->open_inb_mbox == NULL)
+		goto out;
+
+	res = kmalloc(sizeof(struct resource), GFP_KERNEL);
 
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
@@ -88,7 +92,7 @@ int rio_request_inb_mbox(struct rio_mport *mport,
 		/* Hook the inbound message callback */
 		mport->inb_msg[mbox].mcback = minb;
 
-		rc = rio_open_inb_mbox(mport, dev_id, mbox, entries);
+		rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries);
 	} else
 		rc = -ENOMEM;
 
@@ -106,10 +110,13 @@ int rio_request_inb_mbox(struct rio_mport *mport,
  */
 int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
 {
-	rio_close_inb_mbox(mport, mbox);
+	if (mport->ops->close_inb_mbox) {
+		mport->ops->close_inb_mbox(mport, mbox);
 
-	/* Release the mailbox resource */
-	return release_resource(mport->inb_msg[mbox].res);
+		/* Release the mailbox resource */
+		return release_resource(mport->inb_msg[mbox].res);
+	} else
+		return -ENOSYS;
 }
 
 /**
@@ -129,9 +136,13 @@ int rio_request_outb_mbox(struct rio_mport *mport,
 			  int entries,
 			  void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
 {
-	int rc = 0;
+	int rc = -ENOSYS;
+	struct resource *res;
 
-	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+	if (mport->ops->open_outb_mbox == NULL)
+		goto out;
+
+	res = kmalloc(sizeof(struct resource), GFP_KERNEL);
 
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
@@ -149,7 +160,7 @@ int rio_request_outb_mbox(struct rio_mport *mport,
 		/* Hook the inbound message callback */
 		mport->outb_msg[mbox].mcback = moutb;
 
-		rc = rio_open_outb_mbox(mport, dev_id, mbox, entries);
+		rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries);
 	} else
 		rc = -ENOMEM;
 
@@ -167,10 +178,13 @@ int rio_request_outb_mbox(struct rio_mport *mport,
  */
 int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
 {
-	rio_close_outb_mbox(mport, mbox);
+	if (mport->ops->close_outb_mbox) {
+		mport->ops->close_outb_mbox(mport, mbox);
 
-	/* Release the mailbox resource */
-	return release_resource(mport->outb_msg[mbox].res);
+		/* Release the mailbox resource */
+		return release_resource(mport->outb_msg[mbox].res);
+	} else
+		return -ENOSYS;
 }
 
 /**