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[RAPIDIO] Add RapidIO multi mport support

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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 <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Zhang Wei 2008-04-18 13:33:41 -07:00 committed by Paul Mackerras
parent 5a7b60ed88
commit ad1e9380b1
3 changed files with 237 additions and 184 deletions
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393
arch/powerpc/sysdev/fsl_rio.c
View file

@ -1,6 +1,9 @@
/*
* Freescale MPC85xx/MPC86xx RapidIO support
*
* Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
* Zhang Wei <wei.zhang@freescale.com>
*
* Copyright 2005 MontaVista Software, Inc.
* Matt Porter <mporter@kernel.crashing.org>
*
@ -20,6 +23,11 @@
#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
#define RIO_MSG_REGS_OFFSET 0x11000
@ -112,20 +120,12 @@ struct rio_tx_desc {
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];
@ -133,16 +133,32 @@ static struct rio_msg_tx_ring {
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
@ -153,12 +169,14 @@ static struct rio_msg_rx_ring {
* 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;
}
@ -173,11 +191,13 @@ static int fsl_rio_doorbell_send(int index, u16 destid, u16 data)
* 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;
}
@ -192,12 +212,14 @@ static int fsl_local_config_read(int index, u32 offset, int len, u32 *data)
* 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;
}
@ -215,18 +237,19 @@ static int fsl_local_config_write(int index, u32 offset, int len, u32 data)
* 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);
@ -255,17 +278,18 @@ fsl_rio_config_read(int index, u16 destid, u8 hopcount, u32 offset, int len,
* 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);
@ -296,9 +320,10 @@ int
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
@ -311,11 +336,11 @@ rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
}
/* 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;
@ -327,15 +352,16 @@ rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
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;
@ -356,28 +382,30 @@ fsl_rio_tx_handler(int irq, void *dev_instance)
{
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:
@ -398,6 +426,7 @@ fsl_rio_tx_handler(int irq, void *dev_instance)
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))) {
@ -406,54 +435,53 @@ int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entr
}
/* 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;
/*
@ -463,28 +491,28 @@ int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entr
* 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;
}
@ -499,15 +527,16 @@ int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entr
*/
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);
}
/**
@ -523,12 +552,13 @@ fsl_rio_rx_handler(int irq, void *dev_instance)
{
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;
}
@ -540,10 +570,10 @@ fsl_rio_rx_handler(int irq, void *dev_instance)
* 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:
@ -564,6 +594,7 @@ fsl_rio_rx_handler(int irq, void *dev_instance)
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))) {
@ -572,36 +603,35 @@ int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entri
}
/* 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;
}
@ -612,15 +642,13 @@ int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entri
* 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;
@ -636,15 +664,16 @@ int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entri
*/
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);
}
/**
@ -659,21 +688,22 @@ void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
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;
@ -691,20 +721,21 @@ EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
*/
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
@ -716,11 +747,10 @@ void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
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;
@ -741,27 +771,27 @@ fsl_rio_dbell_handler(int irq, void *dev_instance)
{
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;
@ -784,9 +814,8 @@ fsl_rio_dbell_handler(int irq, void *dev_instance)
("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:
@ -803,12 +832,13 @@ fsl_rio_dbell_handler(int irq, void *dev_instance)
*/
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;
@ -816,37 +846,36 @@ static int fsl_rio_doorbell_init(struct rio_mport *mport)
}
/* 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;
@ -887,6 +916,8 @@ void fsl_rio_setup(int law_start, int law_size)
{
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;
@ -895,9 +926,17 @@ void fsl_rio_setup(int law_start, int law_size)
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;
@ -911,22 +950,32 @@ void fsl_rio_setup(int law_start, int 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);
}

10
drivers/rapidio/rio-access.c
View file

@ -48,7 +48,7 @@ int __rio_local_read_config_##size \
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; \
@ -71,7 +71,7 @@ int __rio_local_write_config_##size \
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; \
}
@ -108,7 +108,7 @@ int rio_mport_read_config_##size \
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; \
@ -131,7 +131,7 @@ int rio_mport_write_config_##size \
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; \
}
@ -166,7 +166,7 @@ int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)
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;

18
include/linux/rio.h
View file

@ -163,6 +163,7 @@ struct rio_dbell {
* @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 */
@ -178,6 +179,7 @@ struct rio_mport {
unsigned char index; /* port index, unique among all port
interfaces of the same type */
unsigned char name[40];
void *priv; /* Master port private data */
};
/**
@ -229,13 +231,15 @@ struct rio_switch {
* @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