[RAPIDIO] Add RapidIO multi mport support

The original RapidIO driver suppose there is only one mpc85xx RIO controller
in system. So, some data structures are defined as mpc85xx_rio global, such
as 'regs_win', 'dbell_ring', 'msg_tx_ring'. Now, I changed them to mport's
private members. And you can define multi RIO OF-nodes in dts file for multi
RapidIO controller in one processor, such as PCI/PCI-Ex host controllers in
Freescale's silicon. And the mport operation function declaration should be
changed to know which RapidIO controller is target.

Signed-off-by: Zhang Wei <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/sysdev/fsl_rio.c

···
 /*
  * Freescale MPC85xx/MPC86xx RapidIO support
  *
+ * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
+ * Zhang Wei <[e-mail]>
+ *
  * Copyright 2005 MontaVista Software, Inc.
  * Matt Porter <[e-mail]>
  *
···
 #include <linux/rio_drv.h>
 
 #include <asm/io.h>
+
+/* RapidIO definition irq, which read from OF-tree */
+#define IRQ_RIO_BELL(m)		(((struct rio_priv *)(m->priv))->bellirq)
+#define IRQ_RIO_TX(m)		(((struct rio_priv *)(m->priv))->txirq)
+#define IRQ_RIO_RX(m)		(((struct rio_priv *)(m->priv))->rxirq)
 
 #define RIO_REGS_BASE		(CCSRBAR + 0xc0000)
 #define RIO_ATMU_REGS_OFFSET	0x10c00
···
 	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 {
+struct rio_dbell_ring {
 	void *virt;
 	dma_addr_t phys;
-} dbell_ring;
+};
 
-static struct rio_msg_tx_ring {
+struct rio_msg_tx_ring {
 	void *virt;
 	dma_addr_t phys;
 	void *virt_buffer[RIO_MAX_TX_RING_SIZE];
···
 	int tx_slot;
 	int size;
 	void *dev_id;
-} msg_tx_ring;
+};
 
-static struct rio_msg_rx_ring {
+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;
+};
+
+struct rio_priv {
+	void __iomem *regs_win;
+	struct rio_atmu_regs __iomem *atmu_regs;
+	struct rio_atmu_regs __iomem *maint_atmu_regs;
+	struct rio_atmu_regs __iomem *dbell_atmu_regs;
+	void __iomem *dbell_win;
+	void __iomem *maint_win;
+	struct rio_msg_regs __iomem *msg_regs;
+	struct rio_dbell_ring dbell_ring;
+	struct rio_msg_tx_ring msg_tx_ring;
+	struct rio_msg_rx_ring msg_rx_ring;
+	int bellirq;
+	int txirq;
+	int rxirq;
+};
 
 /**
  * fsl_rio_doorbell_send - Send a MPC85xx doorbell message
···
  * Sends a MPC85xx doorbell message. Returns %0 on success or
  * %-EINVAL on failure.
  */
-static int fsl_rio_doorbell_send(int index, u16 destid, u16 data)
+static int fsl_rio_doorbell_send(struct rio_mport *mport,
+				int index, u16 destid, u16 data)
 {
+	struct rio_priv *priv = mport->priv;
 	pr_debug("fsl_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);
+	out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
+	out_be16(priv->dbell_win, data);
 
 	return 0;
 }
···
  * Generates a MPC85xx local configuration space read. Returns %0 on
  * success or %-EINVAL on failure.
  */
-static int fsl_local_config_read(int index, u32 offset, int len, u32 *data)
+static int fsl_local_config_read(struct rio_mport *mport,
+				int index, u32 offset, int len, u32 *data)
 {
+	struct rio_priv *priv = mport->priv;
 	pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
 		 offset);
-	*data = in_be32((void *)(regs_win + offset));
+	*data = in_be32(priv->regs_win + offset);
 
 	return 0;
 }
···
  * Generates a MPC85xx local configuration space write. Returns %0 on
  * success or %-EINVAL on failure.
  */
-static int fsl_local_config_write(int index, u32 offset, int len, u32 data)
+static int fsl_local_config_write(struct rio_mport *mport,
+				int index, u32 offset, int len, u32 data)
 {
+	struct rio_priv *priv = mport->priv;
 	pr_debug
 	    ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
 	     index, offset, data);
-	out_be32((void *)(regs_win + offset), data);
+	out_be32(priv->regs_win + offset, data);
 
 	return 0;
 }
···
  * success or %-EINVAL on failure.
  */
 static int
-fsl_rio_config_read(int index, u16 destid, u8 hopcount, u32 offset, int len,
-			u32 * val)
+fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
+			u8 hopcount, u32 offset, int len, u32 *val)
 {
+	struct rio_priv *priv = mport->priv;
 	u8 *data;
 
 	pr_debug
 	    ("fsl_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,
+	out_be32(&priv->maint_atmu_regs->rowtar,
 		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
 
-	data = (u8 *) maint_win + offset;
+	data = (u8 *) priv->maint_win + offset;
 	switch (len) {
 	case 1:
 		*val = in_8((u8 *) data);
···
  * success or %-EINVAL on failure.
  */
 static int
-fsl_rio_config_write(int index, u16 destid, u8 hopcount, u32 offset,
-			 int len, u32 val)
+fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
+			u8 hopcount, u32 offset, int len, u32 val)
 {
+	struct rio_priv *priv = mport->priv;
 	u8 *data;
 	pr_debug
 	    ("fsl_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,
+	out_be32(&priv->maint_atmu_regs->rowtar,
 		 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
 
-	data = (u8 *) maint_win + offset;
+	data = (u8 *) priv->maint_win + offset;
 	switch (len) {
 	case 1:
 		out_8((u8 *) data, val);
···
 rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
 			void *buffer, size_t len)
 {
+	struct rio_priv *priv = mport->priv;
 	u32 omr;
-	struct rio_tx_desc *desc =
-	    (struct rio_tx_desc *)msg_tx_ring.virt + msg_tx_ring.tx_slot;
+	struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
+					+ priv->msg_tx_ring.tx_slot;
 	int ret = 0;
 
 	pr_debug
···
 	}
 
 	/* Copy and clear rest of buffer */
-	memcpy(msg_tx_ring.virt_buffer[msg_tx_ring.tx_slot], buffer, len);
+	memcpy(priv->msg_tx_ring.virt_buffer[priv->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);
+		memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
+				+ len, 0, RIO_MAX_MSG_SIZE - len);
 
 	/* Set mbox field for message */
 	desc->dport = mbox & 0x3;
···
 	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];
+	desc->saddr = 0x00000004
+		| priv->msg_tx_ring.phys_buffer[priv->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);
+	omr = in_be32(&priv->msg_regs->omr);
+	out_be32(&priv->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;
+	if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
+		priv->msg_tx_ring.tx_slot = 0;
 
       out:
 	return ret;
···
 {
 	int osr;
 	struct rio_mport *port = (struct rio_mport *)dev_instance;
+	struct rio_priv *priv = port->priv;
 
-	osr = in_be32((void *)&msg_regs->osr);
+	osr = in_be32(&priv->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);
+		out_be32(&priv->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);
+		out_be32(&priv->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);
+		u32 dqp = in_be32(&priv->msg_regs->odqdpar);
+		int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
+		port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
+				slot);
 
 		/* Ack the end-of-message interrupt */
-		out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_EOMI);
+		out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
 	}
 
       out:
···
 int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
 {
 	int i, j, rc = 0;
+	struct rio_priv *priv = mport->priv;
 
 	if ((entries < RIO_MIN_TX_RING_SIZE) ||
 	    (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
···
 	}
 
 	/* Initialize shadow copy ring */
-	msg_tx_ring.dev_id = dev_id;
-	msg_tx_ring.size = entries;
+	priv->msg_tx_ring.dev_id = dev_id;
+	priv->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))) {
+	for (i = 0; i < priv->msg_tx_ring.size; i++) {
+		priv->msg_tx_ring.virt_buffer[i] =
+			dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
+				&priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
+		if (!priv->msg_tx_ring.virt_buffer[i]) {
 			rc = -ENOMEM;
-			for (j = 0; j < msg_tx_ring.size; j++)
-				if (msg_tx_ring.virt_buffer[j])
+			for (j = 0; j < priv->msg_tx_ring.size; j++)
+				if (priv->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]);
+							RIO_MSG_BUFFER_SIZE,
+							priv->msg_tx_ring.
+							virt_buffer[j],
+							priv->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))) {
+	priv->msg_tx_ring.virt = dma_alloc_coherent(NULL,
+				priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
+				&priv->msg_tx_ring.phys, GFP_KERNEL);
+	if (!priv->msg_tx_ring.virt) {
 		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;
+	memset(priv->msg_tx_ring.virt, 0,
+			priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
+	priv->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);
+	out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
+	out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
 
 	/* Configure for snooping */
-	out_be32((void *)&msg_regs->osar, 0x00000004);
+	out_be32(&priv->msg_regs->osar, 0x00000004);
 
 	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->osr, 0x000000b3);
+	out_be32(&priv->msg_regs->osr, 0x000000b3);
 
 	/* Hook up outbound message handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_TX, fsl_rio_tx_handler, 0,
-			 "msg_tx", (void *)mport)) < 0)
+	rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
+			 "msg_tx", (void *)mport);
+	if (rc < 0)
 		goto out_irq;
 
 	/*
···
 	 *      Chaining mode
 	 *      Disable
 	 */
-	out_be32((void *)&msg_regs->omr, 0x00100220);
+	out_be32(&priv->msg_regs->omr, 0x00100220);
 
 	/* Set number of entries */
-	out_be32((void *)&msg_regs->omr,
-		 in_be32((void *)&msg_regs->omr) |
+	out_be32(&priv->msg_regs->omr,
+		 in_be32(&priv->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_be32(&priv->msg_regs->omr, in_be32(&priv->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);
+	dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
+			  priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
 
       out_dma:
-	for (i = 0; i < msg_tx_ring.size; i++)
+	for (i = 0; i < priv->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]);
+				  priv->msg_tx_ring.virt_buffer[i],
+				  priv->msg_tx_ring.phys_buffer[i]);
 
 	return rc;
 }
···
  */
 void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
 {
+	struct rio_priv *priv = mport->priv;
 	/* Disable inbound message unit */
-	out_be32((void *)&msg_regs->omr, 0);
+	out_be32(&priv->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);
+	dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
+			  priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
 
 	/* Free interrupt */
-	free_irq(MPC85xx_IRQ_RIO_TX, (void *)mport);
+	free_irq(IRQ_RIO_TX(mport), (void *)mport);
 }
 
 /**
···
 {
 	int isr;
 	struct rio_mport *port = (struct rio_mport *)dev_instance;
+	struct rio_priv *priv = port->priv;
 
-	isr = in_be32((void *)&msg_regs->isr);
+	isr = in_be32(&priv->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);
+		out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
 		goto out;
 	}
 
···
 		 * make the callback with an unknown/invalid mailbox number
 		 * argument.
 		 */
-		port->inb_msg[0].mcback(port, msg_rx_ring.dev_id, -1, -1);
+		port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
 
 		/* Ack the queueing interrupt */
-		out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_DIQI);
+		out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
 	}
 
       out:
···
 int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
 {
 	int i, rc = 0;
+	struct rio_priv *priv = mport->priv;
 
 	if ((entries < RIO_MIN_RX_RING_SIZE) ||
 	    (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
···
 	}
 
 	/* 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;
+	priv->msg_rx_ring.dev_id = dev_id;
+	priv->msg_rx_ring.size = entries;
+	priv->msg_rx_ring.rx_slot = 0;
+	for (i = 0; i < priv->msg_rx_ring.size; i++)
+		priv->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))) {
+	priv->msg_rx_ring.virt = dma_alloc_coherent(NULL,
+				priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
+				&priv->msg_rx_ring.phys, GFP_KERNEL);
+	if (!priv->msg_rx_ring.virt) {
 		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);
+	out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
+	out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
 
 	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->isr, 0x00000091);
+	out_be32(&priv->msg_regs->isr, 0x00000091);
 
 	/* Hook up inbound message handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_RX, fsl_rio_rx_handler, 0,
-			 "msg_rx", (void *)mport)) < 0) {
+	rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
+			 "msg_rx", (void *)mport);
+	if (rc < 0) {
 		dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
-				  msg_tx_ring.virt_buffer[i],
-				  msg_tx_ring.phys_buffer[i]);
+				  priv->msg_tx_ring.virt_buffer[i],
+				  priv->msg_tx_ring.phys_buffer[i]);
 		goto out;
 	}
 
···
 	 *      Unmask all interrupt sources
 	 *      Disable
 	 */
-	out_be32((void *)&msg_regs->imr, 0x001b0060);
+	out_be32(&priv->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));
+	setbits32(&priv->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);
+	setbits32(&priv->msg_regs->imr, 0x1);
 
       out:
 	return rc;
···
  */
 void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
 {
+	struct rio_priv *priv = mport->priv;
 	/* Disable inbound message unit */
-	out_be32((void *)&msg_regs->imr, 0);
+	out_be32(&priv->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);
+	dma_free_coherent(NULL, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
+			  priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
 
 	/* Free interrupt */
-	free_irq(MPC85xx_IRQ_RIO_RX, (void *)mport);
+	free_irq(IRQ_RIO_RX(mport), (void *)mport);
 }
 
 /**
···
 int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
 {
 	int rc = 0;
+	struct rio_priv *priv = mport->priv;
 
 	pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
-		 msg_rx_ring.rx_slot);
+		 priv->msg_rx_ring.rx_slot);
 
-	if (msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot]) {
+	if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
 		printk(KERN_ERR
 		       "RIO: error adding inbound buffer %d, buffer exists\n",
-		       msg_rx_ring.rx_slot);
+		       priv->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;
+	priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
+	if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
+		priv->msg_rx_ring.rx_slot = 0;
 
       out:
 	return rc;
···
  */
 void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
 {
-	u32 imr;
+	struct rio_priv *priv = mport->priv;
 	u32 phys_buf, virt_buf;
 	void *buf = NULL;
 	int buf_idx;
 
-	phys_buf = in_be32((void *)&msg_regs->ifqdpar);
+	phys_buf = in_be32(&priv->msg_regs->ifqdpar);
 
 	/* If no more messages, then bail out */
-	if (phys_buf == in_be32((void *)&msg_regs->ifqepar))
+	if (phys_buf == in_be32(&priv->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];
+	virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
+						- priv->msg_rx_ring.phys);
+	buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
+	buf = priv->msg_rx_ring.virt_buffer[buf_idx];
 
 	if (!buf) {
 		printk(KERN_ERR
···
 	memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
 
 	/* Clear the available buffer */
-	msg_rx_ring.virt_buffer[buf_idx] = NULL;
+	priv->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);
+	setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
 
       out2:
 	return buf;
···
 {
 	int dsr;
 	struct rio_mport *port = (struct rio_mport *)dev_instance;
+	struct rio_priv *priv = port->priv;
 
-	dsr = in_be32((void *)&msg_regs->dsr);
+	dsr = in_be32(&priv->msg_regs->dsr);
 
 	if (dsr & DOORBELL_DSR_TE) {
 		pr_info("RIO: doorbell reception error\n");
-		out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_TE);
+		out_be32(&priv->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);
+		out_be32(&priv->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;
+		    (u32) priv->dbell_ring.virt +
+		    (in_be32(&priv->msg_regs->dqdpar) & 0xfff);
 		struct rio_dbell *dbell;
 		int found = 0;
 
···
 			    ("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);
+		setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
+		out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
 	}
 
       out:
···
  */
 static int fsl_rio_doorbell_init(struct rio_mport *mport)
 {
+	struct rio_priv *priv = mport->priv;
 	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))) {
+	priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
+			    RIO_DBELL_WIN_SIZE);
+	if (!priv->dbell_win) {
 		printk(KERN_ERR
 		       "RIO: unable to map outbound doorbell window\n");
 		rc = -ENOMEM;
···
 	}
 
 	/* Initialize inbound doorbells */
-	if (!(dbell_ring.virt = dma_alloc_coherent(NULL,
-						   512 * DOORBELL_MESSAGE_SIZE,
-						   &dbell_ring.phys,
-						   GFP_KERNEL))) {
+	priv->dbell_ring.virt = dma_alloc_coherent(NULL, 512 *
+		    DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
+	if (!priv->dbell_ring.virt) {
 		printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
 		rc = -ENOMEM;
-		iounmap((void *)dbell_win);
+		iounmap(priv->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);
+	out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
+	out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
 
 	/* Clear interrupt status */
-	out_be32((void *)&msg_regs->dsr, 0x00000091);
+	out_be32(&priv->msg_regs->dsr, 0x00000091);
 
 	/* Hook up doorbell handler */
-	if ((rc =
-	     request_irq(MPC85xx_IRQ_RIO_BELL, fsl_rio_dbell_handler, 0,
-			 "dbell_rx", (void *)mport) < 0)) {
-		iounmap((void *)dbell_win);
+	rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
+			 "dbell_rx", (void *)mport);
+	if (rc < 0) {
+		iounmap(priv->dbell_win);
 		dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
-				  dbell_ring.virt, dbell_ring.phys);
+				  priv->dbell_ring.virt, priv->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_be32(&priv->msg_regs->dmr, 0x00108161);
 
       out:
 	return rc;
···
 {
 	struct rio_ops *ops;
 	struct rio_mport *port;
+	struct rio_priv *priv = NULL;
+	int rc;
 
 	ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
 	ops->lcread = fsl_local_config_read;
···
 	ops->cwrite = fsl_rio_config_write;
 	ops->dsend = fsl_rio_doorbell_send;
 
-	port = kmalloc(sizeof(struct rio_mport), GFP_KERNEL);
+	port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
 	port->id = 0;
 	port->index = 0;
+
+	priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
+	if (!priv) {
+		printk(KERN_ERR "Can't alloc memory for 'priv'\n");
+		rc = -ENOMEM;
+		goto err;
+	}
+
 	INIT_LIST_HEAD(&port->dbells);
 	port->iores.start = law_start;
 	port->iores.end = law_start + law_size;
···
 	port->ops = ops;
 	port->host_deviceid = fsl_rio_get_hdid(port->id);
 
+	port->priv = priv;
 	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);
+	priv->regs_win = ioremap(RIO_REGS_BASE, 0x20000);
+	priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
+					+ RIO_ATMU_REGS_OFFSET);
+	priv->maint_atmu_regs = priv->atmu_regs + 1;
+	priv->dbell_atmu_regs = priv->atmu_regs + 2;
+	priv->msg_regs = (struct rio_msg_regs *)(priv->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);
+	out_be32(&priv->maint_atmu_regs->rowbar, 0x000c0000);
+	out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);
 
-	maint_win = (u32) ioremap(law_start, RIO_MAINT_WIN_SIZE);
+	priv->maint_win = 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);
+	out_be32(&priv->dbell_atmu_regs->rowbar, 0x000c0400);
+	out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
 	fsl_rio_doorbell_init(port);
+
+	return;
+err:
+	if (priv)
+		iounmap(priv->regs_win);
+	kfree(priv);
+	kfree(port);
 }

drivers/rapidio/rio-access.c

···
 	u32 data = 0;							\
 	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
 	spin_lock_irqsave(&rio_config_lock, flags);			\
-	res = mport->ops->lcread(mport->id, offset, len, &data);	\
+	res = mport->ops->lcread(mport, mport->id, offset, len, &data);	\
 	*value = (type)data;						\
 	spin_unlock_irqrestore(&rio_config_lock, flags);		\
 	return res;							\
···
 	unsigned long flags;						\
 	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
 	spin_lock_irqsave(&rio_config_lock, flags);			\
-	res = mport->ops->lcwrite(mport->id, offset, len, value);	\
+	res = mport->ops->lcwrite(mport, mport->id, offset, len, value);\
 	spin_unlock_irqrestore(&rio_config_lock, flags);		\
 	return res;							\
 }
···
 	u32 data = 0;							\
 	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
 	spin_lock_irqsave(&rio_config_lock, flags);			\
-	res = mport->ops->cread(mport->id, destid, hopcount, offset, len, &data); \
+	res = mport->ops->cread(mport, mport->id, destid, hopcount, offset, len, &data); \
 	*value = (type)data;						\
 	spin_unlock_irqrestore(&rio_config_lock, flags);		\
 	return res;							\
···
 	unsigned long flags;						\
 	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
 	spin_lock_irqsave(&rio_config_lock, flags);			\
-	res = mport->ops->cwrite(mport->id, destid, hopcount, offset, len, value); \
+	res = mport->ops->cwrite(mport, mport->id, destid, hopcount, offset, len, value); \
 	spin_unlock_irqrestore(&rio_config_lock, flags);		\
 	return res;							\
 }
···
 	unsigned long flags;
 
 	spin_lock_irqsave(&rio_doorbell_lock, flags);
-	res = mport->ops->dsend(mport->id, destid, data);
+	res = mport->ops->dsend(mport, mport->id, destid, data);
 	spin_unlock_irqrestore(&rio_doorbell_lock, flags);
 
 	return res;

include/linux/rio.h

···
  * @id: Port ID, unique among all ports
  * @index: Port index, unique among all port interfaces of the same type
  * @name: Port name string
+ * @priv: Master port private data
  */
 struct rio_mport {
 	struct list_head dbells;	/* list of doorbell events */
···
 	unsigned char index;	/* port index, unique among all port
 				   interfaces of the same type */
 	unsigned char name[40];
+	void *priv;		/* Master port private data */
 };
 
 /**
···
  * @dsend: Callback to send a doorbell message.
  */
 struct rio_ops {
-	int (*lcread) (int index, u32 offset, int len, u32 * data);
-	int (*lcwrite) (int index, u32 offset, int len, u32 data);
-	int (*cread) (int index, u16 destid, u8 hopcount, u32 offset, int len,
-		      u32 * data);
-	int (*cwrite) (int index, u16 destid, u8 hopcount, u32 offset, int len,
-		       u32 data);
-	int (*dsend) (int index, u16 destid, u16 data);
+	int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
+			u32 *data);
+	int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
+			u32 data);
+	int (*cread) (struct rio_mport *mport, int index, u16 destid,
+			u8 hopcount, u32 offset, int len, u32 *data);
+	int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
+			u8 hopcount, u32 offset, int len, u32 data);
+	int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
 };
 
 #define RIO_RESOURCE_MEM	0x00000100