[POWERPC] Move RapidIO support code from arch/ppc

Do just enough to move the RapidIO support code for 85xx over from arch/ppc
into arch/powerpc and make it still build.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 0 insertions, 932 deletions

diff --git a/arch/ppc/syslib/ppc85xx_rio.c b/arch/ppc/syslib/ppc85xx_rio.c
deleted file mode 100644
index af2425e..0000000
--- a/arch/ppc/syslib/ppc85xx_rio.c
+++ /dev/null
@@ -1,932 +0,0 @@
-/*
- * MPC85xx RapidIO support
- *
- * Copyright 2005 MontaVista Software, Inc.
- * Matt Porter <mporter@kernel.crashing.org>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/rio.h>
-#include <linux/rio_drv.h>
-
-#include <asm/io.h>
-
-#define RIO_REGS_BASE		(CCSRBAR + 0xc0000)
-#define RIO_ATMU_REGS_OFFSET	0x10c00
-#define RIO_MSG_REGS_OFFSET	0x11000
-#define RIO_MAINT_WIN_SIZE	0x400000
-#define RIO_DBELL_WIN_SIZE	0x1000
-
-#define RIO_MSG_OMR_MUI		0x00000002
-#define RIO_MSG_OSR_TE		0x00000080
-#define RIO_MSG_OSR_QOI		0x00000020
-#define RIO_MSG_OSR_QFI		0x00000010
-#define RIO_MSG_OSR_MUB		0x00000004
-#define RIO_MSG_OSR_EOMI	0x00000002
-#define RIO_MSG_OSR_QEI		0x00000001
-
-#define RIO_MSG_IMR_MI		0x00000002
-#define RIO_MSG_ISR_TE		0x00000080
-#define RIO_MSG_ISR_QFI		0x00000010
-#define RIO_MSG_ISR_DIQI	0x00000001
-
-#define RIO_MSG_DESC_SIZE	32
-#define RIO_MSG_BUFFER_SIZE	4096
-#define RIO_MIN_TX_RING_SIZE	2
-#define RIO_MAX_TX_RING_SIZE	2048
-#define RIO_MIN_RX_RING_SIZE	2
-#define RIO_MAX_RX_RING_SIZE	2048
-
-#define DOORBELL_DMR_DI		0x00000002
-#define DOORBELL_DSR_TE		0x00000080
-#define DOORBELL_DSR_QFI	0x00000010
-#define DOORBELL_DSR_DIQI	0x00000001
-#define DOORBELL_TID_OFFSET	0x03
-#define DOORBELL_SID_OFFSET	0x05
-#define DOORBELL_INFO_OFFSET	0x06
-
-#define DOORBELL_MESSAGE_SIZE	0x08
-#define DBELL_SID(x)		(*(u8 *)(x + DOORBELL_SID_OFFSET))
-#define DBELL_TID(x)		(*(u8 *)(x + DOORBELL_TID_OFFSET))
-#define DBELL_INF(x)		(*(u16 *)(x + DOORBELL_INFO_OFFSET))
-
-struct rio_atmu_regs {
-	u32 rowtar;
-	u32 pad1;
-	u32 rowbar;
-	u32 pad2;
-	u32 rowar;
-	u32 pad3[3];
-};
-
-struct rio_msg_regs {
-	u32 omr;
-	u32 osr;
-	u32 pad1;
-	u32 odqdpar;
-	u32 pad2;
-	u32 osar;
-	u32 odpr;
-	u32 odatr;
-	u32 odcr;
-	u32 pad3;
-	u32 odqepar;
-	u32 pad4[13];
-	u32 imr;
-	u32 isr;
-	u32 pad5;
-	u32 ifqdpar;
-	u32 pad6;
-	u32 ifqepar;
-	u32 pad7[250];
-	u32 dmr;
-	u32 dsr;
-	u32 pad8;
-	u32 dqdpar;
-	u32 pad9;
-	u32 dqepar;
-	u32 pad10[26];
-	u32 pwmr;
-	u32 pwsr;
-	u32 pad11;
-	u32 pwqbar;
-};
-
-struct rio_tx_desc {
-	u32 res1;
-	u32 saddr;
-	u32 dport;
-	u32 dattr;
-	u32 res2;
-	u32 res3;
-	u32 dwcnt;
-	u32 res4;
-};
-
-static u32 regs_win;
-static struct rio_atmu_regs *atmu_regs;
-static struct rio_atmu_regs *maint_atmu_regs;
-static struct rio_atmu_regs *dbell_atmu_regs;
-static u32 dbell_win;
-static u32 maint_win;
-static struct rio_msg_regs *msg_regs;
-
-static struct rio_dbell_ring {
-	void *virt;
-	dma_addr_t phys;
-} dbell_ring;
-
-static struct rio_msg_tx_ring {
-	void *virt;
-	dma_addr_t phys;
-	void *virt_buffer[RIO_MAX_TX_RING_SIZE];
-	dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
-	int tx_slot;
-	int size;
-	void *dev_id;
-} msg_tx_ring;
-
-static struct rio_msg_rx_ring {
-	void *virt;
-	dma_addr_t phys;
-	void *virt_buffer[RIO_MAX_RX_RING_SIZE];
-	int rx_slot;
-	int size;
-	void *dev_id;
-} msg_rx_ring;
-
-/**
- * mpc85xx_rio_doorbell_send - Send a MPC85xx doorbell message
- * @index: ID of RapidIO interface
- * @destid: Destination ID of target device
- * @data: 16-bit info field of RapidIO doorbell message
- *
- * Sends a MPC85xx doorbell message. Returns %0 on success or
- * %-EINVAL on failure.
- */
-static int mpc85xx_rio_doorbell_send(int index, u16 destid, u16 data)
-{
-	pr_debug("mpc85xx_doorbell_send: index %d destid %4.4x data %4.4x\n",
-		 index, destid, data);
-	out_be32((void *)&dbell_atmu_regs->rowtar, destid << 22);
-	out_be16((void *)(dbell_win), data);
-
-	return 0;
-}
-
-/**
- * mpc85xx_local_config_read - Generate a MPC85xx local config space read
- * @index: ID of RapdiIO interface
- * @offset: Offset into configuration space
- * @len: Length (in bytes) of the maintenance transaction
- * @data: Value to be read into
- *
- * Generates a MPC85xx local configuration space read. Returns %0 on
- * success or %-EINVAL on failure.
- */
-static int mpc85xx_local_config_read(int index, u32 offset, int len, u32 * data)
-{
-	pr_debug("mpc85xx_local_config_read: index %d offset %8.8x\n", index,
-		 offset);
-	*data = in_be32((void *)(regs_win + offset));
-
-	return 0;
-}
-
-/**
- * mpc85xx_local_config_write - Generate a MPC85xx local config space write
- * @index: ID of RapdiIO interface
- * @offset: Offset into configuration space
- * @len: Length (in bytes) of the maintenance transaction
- * @data: Value to be written
- *
- * Generates a MPC85xx local configuration space write. Returns %0 on
- * success or %-EINVAL on failure.
- */
-static int mpc85xx_local_config_write(int index, u32 offset, int len, u32 data)
-{
-	pr_debug
-	    ("mpc85xx_local_config_write: index %d offset %8.8x data %8.8x\n",
-	     index, offset, data);
-	out_be32((void *)(regs_win + offset), data);
-
-	return 0;
-}
-
-/**
- * mpc85xx_rio_config_read - Generate a MPC85xx read maintenance transaction
- * @index: ID of RapdiIO interface
- * @destid: Destination ID of transaction
- * @hopcount: Number of hops to target device
- * @offset: Offset into configuration space
- * @len: Length (in bytes) of the maintenance transaction
- * @val: Location to be read into
- *
- * Generates a MPC85xx read maintenance transaction. Returns %0 on
- * success or %-EINVAL on failure.
- */
-static int
-mpc85xx_rio_config_read(int index, u16 destid, u8 hopcount, u32 offset, int len,
-			u32 * val)
-{
-	u8 *data;
-
-	pr_debug
-	    ("mpc85xx_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
-	     index, destid, hopcount, offset, len);
-	out_be32((void *)&maint_atmu_regs->rowtar,
-		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
-
-	data = (u8 *) maint_win + offset;
-	switch (len) {
-	case 1:
-		*val = in_8((u8 *) data);
-		break;
-	case 2:
-		*val = in_be16((u16 *) data);
-		break;
-	default:
-		*val = in_be32((u32 *) data);
-		break;
-	}
-
-	return 0;
-}
-
-/**
- * mpc85xx_rio_config_write - Generate a MPC85xx write maintenance transaction
- * @index: ID of RapdiIO interface
- * @destid: Destination ID of transaction
- * @hopcount: Number of hops to target device
- * @offset: Offset into configuration space
- * @len: Length (in bytes) of the maintenance transaction
- * @val: Value to be written
- *
- * Generates an MPC85xx write maintenance transaction. Returns %0 on
- * success or %-EINVAL on failure.
- */
-static int
-mpc85xx_rio_config_write(int index, u16 destid, u8 hopcount, u32 offset,
-			 int len, u32 val)
-{
-	u8 *data;
-	pr_debug
-	    ("mpc85xx_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
-	     index, destid, hopcount, offset, len, val);
-	out_be32((void *)&maint_atmu_regs->rowtar,
-		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
-
-	data = (u8 *) maint_win + offset;
-	switch (len) {
-	case 1:
-		out_8((u8 *) data, val);
-		break;
-	case 2:
-		out_be16((u16 *) data, val);
-		break;
-	default:
-		out_be32((u32 *) data, val);
-		break;
-	}
-
-	return 0;
-}
-
-/**
- * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
- * @mport: Master port with outbound message queue
- * @rdev: Target of outbound message
- * @mbox: Outbound mailbox
- * @buffer: Message to add to outbound queue
- * @len: Length of message
- *
- * Adds the @buffer message to the MPC85xx outbound message queue. Returns
- * %0 on success or %-EINVAL on failure.
- */
-int
-rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
-			void *buffer, size_t len)
-{
-	u32 omr;
-	struct rio_tx_desc *desc =
-	    (struct rio_tx_desc *)msg_tx_ring.virt + msg_tx_ring.tx_slot;
-	int ret = 0;
-
-	pr_debug
-	    ("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
-	     rdev->destid, mbox, (int)buffer, len);
-
-	if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* Copy and clear rest of buffer */
-	memcpy(msg_tx_ring.virt_buffer[msg_tx_ring.tx_slot], buffer, len);
-	if (len < (RIO_MAX_MSG_SIZE - 4))
-		memset((void *)((u32) msg_tx_ring.
-				virt_buffer[msg_tx_ring.tx_slot] + len), 0,
-		       RIO_MAX_MSG_SIZE - len);
-
-	/* Set mbox field for message */
-	desc->dport = mbox & 0x3;
-
-	/* Enable EOMI interrupt, set priority, and set destid */
-	desc->dattr = 0x28000000 | (rdev->destid << 2);
-
-	/* Set transfer size aligned to next power of 2 (in double words) */
-	desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
-
-	/* Set snooping and source buffer address */
-	desc->saddr = 0x00000004 | msg_tx_ring.phys_buffer[msg_tx_ring.tx_slot];
-
-	/* Increment enqueue pointer */
-	omr = in_be32((void *)&msg_regs->omr);
-	out_be32((void *)&msg_regs->omr, omr | RIO_MSG_OMR_MUI);
-
-	/* Go to next descriptor */
-	if (++msg_tx_ring.tx_slot == msg_tx_ring.size)
-		msg_tx_ring.tx_slot = 0;
-
-      out:
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
-
-/**
- * mpc85xx_rio_tx_handler - MPC85xx outbound message interrupt handler
- * @irq: Linux interrupt number
- * @dev_instance: Pointer to interrupt-specific data
- *
- * Handles outbound message interrupts. Executes a register outbound
- * mailbox event handler and acks the interrupt occurrence.
- */
-static irqreturn_t
-mpc85xx_rio_tx_handler(int irq, void *dev_instance)
-{
-	int osr;
-	struct rio_mport *port = (struct rio_mport *)dev_instance;
-
-	osr = in_be32((void *)&msg_regs->osr);
-
-	if (osr & RIO_MSG_OSR_TE) {
-		pr_info("RIO: outbound message transmission error\n");
-		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_TE);
-		goto out;
-	}
-
-	if (osr & RIO_MSG_OSR_QOI) {
-		pr_info("RIO: outbound message queue overflow\n");
-		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_QOI);
-		goto out;
-	}
-
-	if (osr & RIO_MSG_OSR_EOMI) {
-		u32 dqp = in_be32((void *)&msg_regs->odqdpar);
-		int slot = (dqp - msg_tx_ring.phys) >> 5;
-		port->outb_msg[0].mcback(port, msg_tx_ring.dev_id, -1, slot);
-
-		/* Ack the end-of-message interrupt */
-		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_EOMI);
-	}
-
-      out:
-	return IRQ_HANDLED;
-}
-
-/**
- * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
- * @mport: Master port implementing the outbound message unit
- * @dev_id: Device specific pointer to pass on event
- * @mbox: Mailbox to open
- * @entries: Number of entries in the outbound mailbox ring
- *
- * Initializes buffer ring, request the outbound message interrupt,
- * and enables the outbound message unit. Returns %0 on success and
- * %-EINVAL or %-ENOMEM on failure.
- */
-int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
-{
-	int i, j, rc = 0;
-
-	if ((entries < RIO_MIN_TX_RING_SIZE) ||
-	    (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	/* Initialize shadow copy ring */
-	msg_tx_ring.dev_id = dev_id;
-	msg_tx_ring.size = entries;
-
-	for (i = 0; i < msg_tx_ring.size; i++) {
-		if (!
-		    (msg_tx_ring.virt_buffer[i] =
-		     dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
-					&msg_tx_ring.phys_buffer[i],
-					GFP_KERNEL))) {
-			rc = -ENOMEM;
-			for (j = 0; j < msg_tx_ring.size; j++)
-				if (msg_tx_ring.virt_buffer[j])
-					dma_free_coherent(NULL,
-							  RIO_MSG_BUFFER_SIZE,
-							  msg_tx_ring.
-							  virt_buffer[j],
-							  msg_tx_ring.
-							  phys_buffer[j]);
-			goto out;
-		}
-	}
-
-	/* Initialize outbound message descriptor ring */
-	if (!(msg_tx_ring.virt = dma_alloc_coherent(NULL,
-						    msg_tx_ring.size *
-						    RIO_MSG_DESC_SIZE,
-						    &msg_tx_ring.phys,
-						    GFP_KERNEL))) {
-		rc = -ENOMEM;
-		goto out_dma;
-	}
-	memset(msg_tx_ring.virt, 0, msg_tx_ring.size * RIO_MSG_DESC_SIZE);
-	msg_tx_ring.tx_slot = 0;
-
-	/* Point dequeue/enqueue pointers at first entry in ring */
-	out_be32((void *)&msg_regs->odqdpar, msg_tx_ring.phys);
-	out_be32((void *)&msg_regs->odqepar, msg_tx_ring.phys);
-
-	/* Configure for snooping */
-	out_be32((void *)&msg_regs->osar, 0x00000004);
-
-	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->osr, 0x000000b3);
-
-	/* Hook up outbound message handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_TX, mpc85xx_rio_tx_handler, 0,
-			 "msg_tx", (void *)mport)) < 0)
-		goto out_irq;
-
-	/*
-	 * Configure outbound message unit
-	 *      Snooping
-	 *      Interrupts (all enabled, except QEIE)
-	 *      Chaining mode
-	 *      Disable
-	 */
-	out_be32((void *)&msg_regs->omr, 0x00100220);
-
-	/* Set number of entries */
-	out_be32((void *)&msg_regs->omr,
-		 in_be32((void *)&msg_regs->omr) |
-		 ((get_bitmask_order(entries) - 2) << 12));
-
-	/* Now enable the unit */
-	out_be32((void *)&msg_regs->omr, in_be32((void *)&msg_regs->omr) | 0x1);
-
-      out:
-	return rc;
-
-      out_irq:
-	dma_free_coherent(NULL, msg_tx_ring.size * RIO_MSG_DESC_SIZE,
-			  msg_tx_ring.virt, msg_tx_ring.phys);
-
-      out_dma:
-	for (i = 0; i < msg_tx_ring.size; i++)
-		dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
-				  msg_tx_ring.virt_buffer[i],
-				  msg_tx_ring.phys_buffer[i]);
-
-	return rc;
-}
-
-/**
- * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
- * @mport: Master port implementing the outbound message unit
- * @mbox: Mailbox to close
- *
- * Disables the outbound message unit, free all buffers, and
- * frees the outbound message interrupt.
- */
-void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
-{
-	/* Disable inbound message unit */
-	out_be32((void *)&msg_regs->omr, 0);
-
-	/* Free ring */
-	dma_free_coherent(NULL, msg_tx_ring.size * RIO_MSG_DESC_SIZE,
-			  msg_tx_ring.virt, msg_tx_ring.phys);
-
-	/* Free interrupt */
-	free_irq(MPC85xx_IRQ_RIO_TX, (void *)mport);
-}
-
-/**
- * mpc85xx_rio_rx_handler - MPC85xx inbound message interrupt handler
- * @irq: Linux interrupt number
- * @dev_instance: Pointer to interrupt-specific data
- *
- * Handles inbound message interrupts. Executes a registered inbound
- * mailbox event handler and acks the interrupt occurrence.
- */
-static irqreturn_t
-mpc85xx_rio_rx_handler(int irq, void *dev_instance)
-{
-	int isr;
-	struct rio_mport *port = (struct rio_mport *)dev_instance;
-
-	isr = in_be32((void *)&msg_regs->isr);
-
-	if (isr & RIO_MSG_ISR_TE) {
-		pr_info("RIO: inbound message reception error\n");
-		out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_TE);
-		goto out;
-	}
-
-	/* XXX Need to check/dispatch until queue empty */
-	if (isr & RIO_MSG_ISR_DIQI) {
-		/*
-		 * We implement *only* mailbox 0, but can receive messages
-		 * for any mailbox/letter to that mailbox destination. So,
-		 * make the callback with an unknown/invalid mailbox number
-		 * argument.
-		 */
-		port->inb_msg[0].mcback(port, msg_rx_ring.dev_id, -1, -1);
-
-		/* Ack the queueing interrupt */
-		out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_DIQI);
-	}
-
-      out:
-	return IRQ_HANDLED;
-}
-
-/**
- * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
- * @mport: Master port implementing the inbound message unit
- * @dev_id: Device specific pointer to pass on event
- * @mbox: Mailbox to open
- * @entries: Number of entries in the inbound mailbox ring
- *
- * Initializes buffer ring, request the inbound message interrupt,
- * and enables the inbound message unit. Returns %0 on success
- * and %-EINVAL or %-ENOMEM on failure.
- */
-int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
-{
-	int i, rc = 0;
-
-	if ((entries < RIO_MIN_RX_RING_SIZE) ||
-	    (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	/* Initialize client buffer ring */
-	msg_rx_ring.dev_id = dev_id;
-	msg_rx_ring.size = entries;
-	msg_rx_ring.rx_slot = 0;
-	for (i = 0; i < msg_rx_ring.size; i++)
-		msg_rx_ring.virt_buffer[i] = NULL;
-
-	/* Initialize inbound message ring */
-	if (!(msg_rx_ring.virt = dma_alloc_coherent(NULL,
-						    msg_rx_ring.size *
-						    RIO_MAX_MSG_SIZE,
-						    &msg_rx_ring.phys,
-						    GFP_KERNEL))) {
-		rc = -ENOMEM;
-		goto out;
-	}
-
-	/* Point dequeue/enqueue pointers at first entry in ring */
-	out_be32((void *)&msg_regs->ifqdpar, (u32) msg_rx_ring.phys);
-	out_be32((void *)&msg_regs->ifqepar, (u32) msg_rx_ring.phys);
-
-	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->isr, 0x00000091);
-
-	/* Hook up inbound message handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_RX, mpc85xx_rio_rx_handler, 0,
-			 "msg_rx", (void *)mport)) < 0) {
-		dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
-				  msg_tx_ring.virt_buffer[i],
-				  msg_tx_ring.phys_buffer[i]);
-		goto out;
-	}
-
-	/*
-	 * Configure inbound message unit:
-	 *      Snooping
-	 *      4KB max message size
-	 *      Unmask all interrupt sources
-	 *      Disable
-	 */
-	out_be32((void *)&msg_regs->imr, 0x001b0060);
-
-	/* Set number of queue entries */
-	out_be32((void *)&msg_regs->imr,
-		 in_be32((void *)&msg_regs->imr) |
-		 ((get_bitmask_order(entries) - 2) << 12));
-
-	/* Now enable the unit */
-	out_be32((void *)&msg_regs->imr, in_be32((void *)&msg_regs->imr) | 0x1);
-
-      out:
-	return rc;
-}
-
-/**
- * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
- * @mport: Master port implementing the inbound message unit
- * @mbox: Mailbox to close
- *
- * Disables the inbound message unit, free all buffers, and
- * frees the inbound message interrupt.
- */
-void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
-{
-	/* Disable inbound message unit */
-	out_be32((void *)&msg_regs->imr, 0);
-
-	/* Free ring */
-	dma_free_coherent(NULL, msg_rx_ring.size * RIO_MAX_MSG_SIZE,
-			  msg_rx_ring.virt, msg_rx_ring.phys);
-
-	/* Free interrupt */
-	free_irq(MPC85xx_IRQ_RIO_RX, (void *)mport);
-}
-
-/**
- * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
- * @mport: Master port implementing the inbound message unit
- * @mbox: Inbound mailbox number
- * @buf: Buffer to add to inbound queue
- *
- * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
- * %0 on success or %-EINVAL on failure.
- */
-int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
-{
-	int rc = 0;
-
-	pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
-		 msg_rx_ring.rx_slot);
-
-	if (msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot]) {
-		printk(KERN_ERR
-		       "RIO: error adding inbound buffer %d, buffer exists\n",
-		       msg_rx_ring.rx_slot);
-		rc = -EINVAL;
-		goto out;
-	}
-
-	msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot] = buf;
-	if (++msg_rx_ring.rx_slot == msg_rx_ring.size)
-		msg_rx_ring.rx_slot = 0;
-
-      out:
-	return rc;
-}
-
-EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
-
-/**
- * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
- * @mport: Master port implementing the inbound message unit
- * @mbox: Inbound mailbox number
- *
- * Gets the next available inbound message from the inbound message queue.
- * A pointer to the message is returned on success or NULL on failure.
- */
-void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
-{
-	u32 imr;
-	u32 phys_buf, virt_buf;
-	void *buf = NULL;
-	int buf_idx;
-
-	phys_buf = in_be32((void *)&msg_regs->ifqdpar);
-
-	/* If no more messages, then bail out */
-	if (phys_buf == in_be32((void *)&msg_regs->ifqepar))
-		goto out2;
-
-	virt_buf = (u32) msg_rx_ring.virt + (phys_buf - msg_rx_ring.phys);
-	buf_idx = (phys_buf - msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
-	buf = msg_rx_ring.virt_buffer[buf_idx];
-
-	if (!buf) {
-		printk(KERN_ERR
-		       "RIO: inbound message copy failed, no buffers\n");
-		goto out1;
-	}
-
-	/* Copy max message size, caller is expected to allocate that big */
-	memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
-
-	/* Clear the available buffer */
-	msg_rx_ring.virt_buffer[buf_idx] = NULL;
-
-      out1:
-	imr = in_be32((void *)&msg_regs->imr);
-	out_be32((void *)&msg_regs->imr, imr | RIO_MSG_IMR_MI);
-
-      out2:
-	return buf;
-}
-
-EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
-
-/**
- * mpc85xx_rio_dbell_handler - MPC85xx doorbell interrupt handler
- * @irq: Linux interrupt number
- * @dev_instance: Pointer to interrupt-specific data
- *
- * Handles doorbell interrupts. Parses a list of registered
- * doorbell event handlers and executes a matching event handler.
- */
-static irqreturn_t
-mpc85xx_rio_dbell_handler(int irq, void *dev_instance)
-{
-	int dsr;
-	struct rio_mport *port = (struct rio_mport *)dev_instance;
-
-	dsr = in_be32((void *)&msg_regs->dsr);
-
-	if (dsr & DOORBELL_DSR_TE) {
-		pr_info("RIO: doorbell reception error\n");
-		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_TE);
-		goto out;
-	}
-
-	if (dsr & DOORBELL_DSR_QFI) {
-		pr_info("RIO: doorbell queue full\n");
-		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_QFI);
-		goto out;
-	}
-
-	/* XXX Need to check/dispatch until queue empty */
-	if (dsr & DOORBELL_DSR_DIQI) {
-		u32 dmsg =
-		    (u32) dbell_ring.virt +
-		    (in_be32((void *)&msg_regs->dqdpar) & 0xfff);
-		u32 dmr;
-		struct rio_dbell *dbell;
-		int found = 0;
-
-		pr_debug
-		    ("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
-		     DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
-
-		list_for_each_entry(dbell, &port->dbells, node) {
-			if ((dbell->res->start <= DBELL_INF(dmsg)) &&
-			    (dbell->res->end >= DBELL_INF(dmsg))) {
-				found = 1;
-				break;
-			}
-		}
-		if (found) {
-			dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
-				    DBELL_INF(dmsg));
-		} else {
-			pr_debug
-			    ("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
-			     DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
-		}
-		dmr = in_be32((void *)&msg_regs->dmr);
-		out_be32((void *)&msg_regs->dmr, dmr | DOORBELL_DMR_DI);
-		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_DIQI);
-	}
-
-      out:
-	return IRQ_HANDLED;
-}
-
-/**
- * mpc85xx_rio_doorbell_init - MPC85xx doorbell interface init
- * @mport: Master port implementing the inbound doorbell unit
- *
- * Initializes doorbell unit hardware and inbound DMA buffer
- * ring. Called from mpc85xx_rio_setup(). Returns %0 on success
- * or %-ENOMEM on failure.
- */
-static int mpc85xx_rio_doorbell_init(struct rio_mport *mport)
-{
-	int rc = 0;
-
-	/* Map outbound doorbell window immediately after maintenance window */
-	if (!(dbell_win =
-	      (u32) ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
-			    RIO_DBELL_WIN_SIZE))) {
-		printk(KERN_ERR
-		       "RIO: unable to map outbound doorbell window\n");
-		rc = -ENOMEM;
-		goto out;
-	}
-
-	/* Initialize inbound doorbells */
-	if (!(dbell_ring.virt = dma_alloc_coherent(NULL,
-						   512 * DOORBELL_MESSAGE_SIZE,
-						   &dbell_ring.phys,
-						   GFP_KERNEL))) {
-		printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
-		rc = -ENOMEM;
-		iounmap((void *)dbell_win);
-		goto out;
-	}
-
-	/* Point dequeue/enqueue pointers at first entry in ring */
-	out_be32((void *)&msg_regs->dqdpar, (u32) dbell_ring.phys);
-	out_be32((void *)&msg_regs->dqepar, (u32) dbell_ring.phys);
-
-	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->dsr, 0x00000091);
-
-	/* Hook up doorbell handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_BELL, mpc85xx_rio_dbell_handler, 0,
-			 "dbell_rx", (void *)mport) < 0)) {
-		iounmap((void *)dbell_win);
-		dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
-				  dbell_ring.virt, dbell_ring.phys);
-		printk(KERN_ERR
-		       "MPC85xx RIO: unable to request inbound doorbell irq");
-		goto out;
-	}
-
-	/* Configure doorbells for snooping, 512 entries, and enable */
-	out_be32((void *)&msg_regs->dmr, 0x00108161);
-
-      out:
-	return rc;
-}
-
-static char *cmdline = NULL;
-
-static int mpc85xx_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 mpc85xx_rio_get_cmdline(char *s)
-{
-	if (!s)
-		return 0;
-
-	cmdline = s;
-	return 1;
-}
-
-__setup("riohdid=", mpc85xx_rio_get_cmdline);
-
-/**
- * mpc85xx_rio_setup - Setup MPC85xx RapidIO interface
- * @law_start: Starting physical address of RapidIO LAW
- * @law_size: Size of RapidIO LAW
- *
- * Initializes MPC85xx RapidIO hardware interface, configures
- * master port with system-specific info, and registers the
- * master port with the RapidIO subsystem.
- */
-void mpc85xx_rio_setup(int law_start, int law_size)
-{
-	struct rio_ops *ops;
-	struct rio_mport *port;
-
-	ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
-	ops->lcread = mpc85xx_local_config_read;
-	ops->lcwrite = mpc85xx_local_config_write;
-	ops->cread = mpc85xx_rio_config_read;
-	ops->cwrite = mpc85xx_rio_config_write;
-	ops->dsend = mpc85xx_rio_doorbell_send;
-
-	port = kmalloc(sizeof(struct rio_mport), GFP_KERNEL);
-	port->id = 0;
-	port->index = 0;
-	INIT_LIST_HEAD(&port->dbells);
-	port->iores.start = law_start;
-	port->iores.end = law_start + law_size;
-	port->iores.flags = IORESOURCE_MEM;
-
-	rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
-	rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
-	rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
-	strcpy(port->name, "RIO0 mport");
-
-	port->ops = ops;
-	port->host_deviceid = mpc85xx_rio_get_hdid(port->id);
-
-	rio_register_mport(port);
-
-	regs_win = (u32) ioremap(RIO_REGS_BASE, 0x20000);
-	atmu_regs = (struct rio_atmu_regs *)(regs_win + RIO_ATMU_REGS_OFFSET);
-	maint_atmu_regs = atmu_regs + 1;
-	dbell_atmu_regs = atmu_regs + 2;
-	msg_regs = (struct rio_msg_regs *)(regs_win + RIO_MSG_REGS_OFFSET);
-
-	/* Configure maintenance transaction window */
-	out_be32((void *)&maint_atmu_regs->rowbar, 0x000c0000);
-	out_be32((void *)&maint_atmu_regs->rowar, 0x80077015);
-
-	maint_win = (u32) ioremap(law_start, RIO_MAINT_WIN_SIZE);
-
-	/* Configure outbound doorbell window */
-	out_be32((void *)&dbell_atmu_regs->rowbar, 0x000c0400);
-	out_be32((void *)&dbell_atmu_regs->rowar, 0x8004200b);
-	mpc85xx_rio_doorbell_init(port);
-}