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Message-Id: <1298926265-5381-2-git-send-email-alexandre.bounine@idt.com>
Date: Mon, 28 Feb 2011 15:51:01 -0500
From: Alexandre Bounine <alexandre.bounine@....com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org
Cc: Alexandre Bounine <alexandre.bounine@....com>,
Kumar Gala <galak@...nel.crashing.org>,
Matt Porter <mporter@...nel.crashing.org>,
Li Yang <leoli@...escale.com>,
Thomas Moll <thomas.moll@...go.com>,
Micha Nelissen <micha@...i.hopto.org>
Subject: [PATCH 1/5] RapidIO: Add architecture specific callbacks
Extend number of mport callback functions to eliminate direct linking of
architecture specific mport operations.
Signed-off-by: Alexandre Bounine <alexandre.bounine@....com>
---
arch/powerpc/sysdev/fsl_rio.c | 52 +++++++++++++++++++++-------------------
drivers/rapidio/rio.c | 38 ++++++++++++++++++++---------
include/linux/rio.h | 23 ++++++++++++++----
include/linux/rio_drv.h | 7 +++--
4 files changed, 75 insertions(+), 45 deletions(-)
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 8c6cab0..4c28226 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -482,7 +482,7 @@ fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
}
/**
- * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
+ * fsl_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
@@ -492,8 +492,8 @@ fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
* 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,
+static int
+fsl_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
void *buffer, size_t len)
{
struct rio_priv *priv = mport->priv;
@@ -502,9 +502,8 @@ rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
+ priv->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);
+ pr_debug("RIO: fsl_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;
@@ -554,8 +553,6 @@ rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
return ret;
}
-EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
-
/**
* fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
* @irq: Linux interrupt number
@@ -600,7 +597,7 @@ fsl_rio_tx_handler(int irq, void *dev_instance)
}
/**
- * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
+ * fsl_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
@@ -610,7 +607,8 @@ fsl_rio_tx_handler(int irq, void *dev_instance)
* 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)
+static int
+fsl_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;
@@ -706,14 +704,14 @@ int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entr
}
/**
- * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
+ * fsl_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)
+static void fsl_close_outb_mbox(struct rio_mport *mport, int mbox)
{
struct rio_priv *priv = mport->priv;
/* Disable inbound message unit */
@@ -770,7 +768,7 @@ fsl_rio_rx_handler(int irq, void *dev_instance)
}
/**
- * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
+ * fsl_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
@@ -780,7 +778,8 @@ fsl_rio_rx_handler(int irq, void *dev_instance)
* 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)
+static int
+fsl_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
{
int i, rc = 0;
struct rio_priv *priv = mport->priv;
@@ -844,14 +843,14 @@ int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entri
}
/**
- * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
+ * fsl_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)
+static void fsl_close_inb_mbox(struct rio_mport *mport, int mbox)
{
struct rio_priv *priv = mport->priv;
/* Disable inbound message unit */
@@ -866,7 +865,7 @@ void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
}
/**
- * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
+ * fsl_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
@@ -874,12 +873,12 @@ void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
* 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)
+static int fsl_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",
+ pr_debug("RIO: fsl_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
priv->msg_rx_ring.rx_slot);
if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
@@ -898,17 +897,15 @@ int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
return rc;
}
-EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
-
/**
- * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
+ * fsl_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)
+static void *fsl_get_inb_message(struct rio_mport *mport, int mbox)
{
struct rio_priv *priv = mport->priv;
u32 phys_buf, virt_buf;
@@ -945,8 +942,6 @@ void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
return buf;
}
-EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
-
/**
* fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
* @irq: Linux interrupt number
@@ -1431,6 +1426,13 @@ int fsl_rio_setup(struct platform_device *dev)
ops->cwrite = fsl_rio_config_write;
ops->dsend = fsl_rio_doorbell_send;
ops->pwenable = fsl_rio_pw_enable;
+ ops->open_outb_mbox = fsl_open_outb_mbox;
+ ops->open_inb_mbox = fsl_open_inb_mbox;
+ ops->close_outb_mbox = fsl_close_outb_mbox;
+ ops->close_inb_mbox = fsl_close_inb_mbox;
+ ops->add_outb_message = fsl_add_outb_message;
+ ops->add_inb_buffer = fsl_add_inb_buffer;
+ ops->get_inb_message = fsl_get_inb_message;
port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
if (!port) {
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index cc2a3b7..d520dba 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;
}
/**
diff --git a/include/linux/rio.h b/include/linux/rio.h
index ff681eb..efed116 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -241,7 +241,7 @@ struct rio_mport {
struct rio_msg inb_msg[RIO_MAX_MBOX];
struct rio_msg outb_msg[RIO_MAX_MBOX];
int host_deviceid; /* Host device ID */
- struct rio_ops *ops; /* maintenance transaction functions */
+ struct rio_ops *ops; /* low-level architecture-dependent routines */
unsigned char id; /* port ID, unique among all ports */
unsigned char index; /* port index, unique among all port
interfaces of the same type */
@@ -285,6 +285,13 @@ struct rio_net {
* @cwrite: Callback to perform network write of config space.
* @dsend: Callback to send a doorbell message.
* @pwenable: Callback to enable/disable port-write message handling.
+ * @open_outb_mbox: Callback to initialize outbound mailbox.
+ * @close_outb_mbox: Callback to shut down outbound mailbox.
+ * @open_inb_mbox: Callback to initialize inbound mailbox.
+ * @close_inb_mbox: Callback to shut down inbound mailbox.
+ * @add_outb_message: Callback to add a message to an outbound mailbox queue.
+ * @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue.
+ * @get_inb_message: Callback to get a message from an inbound mailbox queue.
*/
struct rio_ops {
int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
@@ -297,6 +304,16 @@ struct rio_ops {
u8 hopcount, u32 offset, int len, u32 data);
int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
int (*pwenable) (struct rio_mport *mport, int enable);
+ int (*open_outb_mbox)(struct rio_mport *mport, void *dev_id,
+ int mbox, int entries);
+ void (*close_outb_mbox)(struct rio_mport *mport, int mbox);
+ int (*open_inb_mbox)(struct rio_mport *mport, void *dev_id,
+ int mbox, int entries);
+ void (*close_inb_mbox)(struct rio_mport *mport, int mbox);
+ int (*add_outb_message)(struct rio_mport *mport, struct rio_dev *rdev,
+ int mbox, void *buffer, size_t len);
+ int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
+ void *(*get_inb_message)(struct rio_mport *mport, int mbox);
};
#define RIO_RESOURCE_MEM 0x00000100
@@ -380,10 +397,6 @@ union rio_pw_msg {
/* Architecture and hardware-specific functions */
extern int rio_init_mports(void);
extern void rio_register_mport(struct rio_mport *);
-extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
- void *, size_t);
-extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
-extern void *rio_hw_get_inb_message(struct rio_mport *, int);
extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
extern void rio_close_inb_mbox(struct rio_mport *, int);
extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
diff --git a/include/linux/rio_drv.h b/include/linux/rio_drv.h
index e09e565..229b3ca 100644
--- a/include/linux/rio_drv.h
+++ b/include/linux/rio_drv.h
@@ -317,7 +317,8 @@ static inline int rio_add_outb_message(struct rio_mport *mport,
struct rio_dev *rdev, int mbox,
void *buffer, size_t len)
{
- return rio_hw_add_outb_message(mport, rdev, mbox, buffer, len);
+ return mport->ops->add_outb_message(mport, rdev, mbox,
+ buffer, len);
}
extern int rio_request_inb_mbox(struct rio_mport *, void *, int, int,
@@ -336,7 +337,7 @@ extern int rio_release_inb_mbox(struct rio_mport *, int);
static inline int rio_add_inb_buffer(struct rio_mport *mport, int mbox,
void *buffer)
{
- return rio_hw_add_inb_buffer(mport, mbox, buffer);
+ return mport->ops->add_inb_buffer(mport, mbox, buffer);
}
/**
@@ -348,7 +349,7 @@ static inline int rio_add_inb_buffer(struct rio_mport *mport, int mbox,
*/
static inline void *rio_get_inb_message(struct rio_mport *mport, int mbox)
{
- return rio_hw_get_inb_message(mport, mbox);
+ return mport->ops->get_inb_message(mport, mbox);
}
/* Doorbell management */
--
1.7.3.1
--
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