mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Yang Yingliang](/assets/img/avatar_default.png)
If device_register() returns error, the name allocated by dev_set_name()
need be freed. It should use put_device() to give up the reference in the
error path, so that the name can be freed in kobject_cleanup(), and
list_del() is called to delete the port from rio_mports.
Link: https://lkml.kernel.org/r/20221114152636.2939035-3-yangyingliang@huawei.com
Fixes: 2aaf308b95
("rapidio: rework device hierarchy and introduce mport class of devices")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2251 lines
60 KiB
C
2251 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* RapidIO interconnect services
|
|
* (RapidIO Interconnect Specification, http://www.rapidio.org)
|
|
*
|
|
* Copyright 2005 MontaVista Software, Inc.
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
*
|
|
* Copyright 2009 - 2013 Integrated Device Technology, Inc.
|
|
* Alex Bounine <alexandre.bounine@idt.com>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/rio.h>
|
|
#include <linux/rio_drv.h>
|
|
#include <linux/rio_ids.h>
|
|
#include <linux/rio_regs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include "rio.h"
|
|
|
|
/*
|
|
* struct rio_pwrite - RIO portwrite event
|
|
* @node: Node in list of doorbell events
|
|
* @pwcback: Doorbell event callback
|
|
* @context: Handler specific context to pass on event
|
|
*/
|
|
struct rio_pwrite {
|
|
struct list_head node;
|
|
|
|
int (*pwcback)(struct rio_mport *mport, void *context,
|
|
union rio_pw_msg *msg, int step);
|
|
void *context;
|
|
};
|
|
|
|
MODULE_DESCRIPTION("RapidIO Subsystem Core");
|
|
MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
|
|
MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int hdid[RIO_MAX_MPORTS];
|
|
static int ids_num;
|
|
module_param_array(hdid, int, &ids_num, 0);
|
|
MODULE_PARM_DESC(hdid,
|
|
"Destination ID assignment to local RapidIO controllers");
|
|
|
|
static LIST_HEAD(rio_devices);
|
|
static LIST_HEAD(rio_nets);
|
|
static DEFINE_SPINLOCK(rio_global_list_lock);
|
|
|
|
static LIST_HEAD(rio_mports);
|
|
static LIST_HEAD(rio_scans);
|
|
static DEFINE_MUTEX(rio_mport_list_lock);
|
|
static unsigned char next_portid;
|
|
static DEFINE_SPINLOCK(rio_mmap_lock);
|
|
|
|
/**
|
|
* rio_local_get_device_id - Get the base/extended device id for a port
|
|
* @port: RIO master port from which to get the deviceid
|
|
*
|
|
* Reads the base/extended device id from the local device
|
|
* implementing the master port. Returns the 8/16-bit device
|
|
* id.
|
|
*/
|
|
u16 rio_local_get_device_id(struct rio_mport *port)
|
|
{
|
|
u32 result;
|
|
|
|
rio_local_read_config_32(port, RIO_DID_CSR, &result);
|
|
|
|
return (RIO_GET_DID(port->sys_size, result));
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_local_get_device_id);
|
|
|
|
/**
|
|
* rio_query_mport - Query mport device attributes
|
|
* @port: mport device to query
|
|
* @mport_attr: mport attributes data structure
|
|
*
|
|
* Returns attributes of specified mport through the
|
|
* pointer to attributes data structure.
|
|
*/
|
|
int rio_query_mport(struct rio_mport *port,
|
|
struct rio_mport_attr *mport_attr)
|
|
{
|
|
if (!port->ops->query_mport)
|
|
return -ENODATA;
|
|
return port->ops->query_mport(port, mport_attr);
|
|
}
|
|
EXPORT_SYMBOL(rio_query_mport);
|
|
|
|
/**
|
|
* rio_alloc_net- Allocate and initialize a new RIO network data structure
|
|
* @mport: Master port associated with the RIO network
|
|
*
|
|
* Allocates a RIO network structure, initializes per-network
|
|
* list heads, and adds the associated master port to the
|
|
* network list of associated master ports. Returns a
|
|
* RIO network pointer on success or %NULL on failure.
|
|
*/
|
|
struct rio_net *rio_alloc_net(struct rio_mport *mport)
|
|
{
|
|
struct rio_net *net = kzalloc(sizeof(*net), GFP_KERNEL);
|
|
|
|
if (net) {
|
|
INIT_LIST_HEAD(&net->node);
|
|
INIT_LIST_HEAD(&net->devices);
|
|
INIT_LIST_HEAD(&net->switches);
|
|
INIT_LIST_HEAD(&net->mports);
|
|
mport->net = net;
|
|
}
|
|
return net;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_alloc_net);
|
|
|
|
int rio_add_net(struct rio_net *net)
|
|
{
|
|
int err;
|
|
|
|
err = device_register(&net->dev);
|
|
if (err)
|
|
return err;
|
|
spin_lock(&rio_global_list_lock);
|
|
list_add_tail(&net->node, &rio_nets);
|
|
spin_unlock(&rio_global_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_add_net);
|
|
|
|
void rio_free_net(struct rio_net *net)
|
|
{
|
|
spin_lock(&rio_global_list_lock);
|
|
if (!list_empty(&net->node))
|
|
list_del(&net->node);
|
|
spin_unlock(&rio_global_list_lock);
|
|
if (net->release)
|
|
net->release(net);
|
|
device_unregister(&net->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_free_net);
|
|
|
|
/**
|
|
* rio_local_set_device_id - Set the base/extended device id for a port
|
|
* @port: RIO master port
|
|
* @did: Device ID value to be written
|
|
*
|
|
* Writes the base/extended device id from a device.
|
|
*/
|
|
void rio_local_set_device_id(struct rio_mport *port, u16 did)
|
|
{
|
|
rio_local_write_config_32(port, RIO_DID_CSR,
|
|
RIO_SET_DID(port->sys_size, did));
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_local_set_device_id);
|
|
|
|
/**
|
|
* rio_add_device- Adds a RIO device to the device model
|
|
* @rdev: RIO device
|
|
*
|
|
* Adds the RIO device to the global device list and adds the RIO
|
|
* device to the RIO device list. Creates the generic sysfs nodes
|
|
* for an RIO device.
|
|
*/
|
|
int rio_add_device(struct rio_dev *rdev)
|
|
{
|
|
int err;
|
|
|
|
atomic_set(&rdev->state, RIO_DEVICE_RUNNING);
|
|
err = device_register(&rdev->dev);
|
|
if (err)
|
|
return err;
|
|
|
|
spin_lock(&rio_global_list_lock);
|
|
list_add_tail(&rdev->global_list, &rio_devices);
|
|
if (rdev->net) {
|
|
list_add_tail(&rdev->net_list, &rdev->net->devices);
|
|
if (rdev->pef & RIO_PEF_SWITCH)
|
|
list_add_tail(&rdev->rswitch->node,
|
|
&rdev->net->switches);
|
|
}
|
|
spin_unlock(&rio_global_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_add_device);
|
|
|
|
/*
|
|
* rio_del_device - removes a RIO device from the device model
|
|
* @rdev: RIO device
|
|
* @state: device state to set during removal process
|
|
*
|
|
* Removes the RIO device to the kernel device list and subsystem's device list.
|
|
* Clears sysfs entries for the removed device.
|
|
*/
|
|
void rio_del_device(struct rio_dev *rdev, enum rio_device_state state)
|
|
{
|
|
pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev));
|
|
atomic_set(&rdev->state, state);
|
|
spin_lock(&rio_global_list_lock);
|
|
list_del(&rdev->global_list);
|
|
if (rdev->net) {
|
|
list_del(&rdev->net_list);
|
|
if (rdev->pef & RIO_PEF_SWITCH) {
|
|
list_del(&rdev->rswitch->node);
|
|
kfree(rdev->rswitch->route_table);
|
|
}
|
|
}
|
|
spin_unlock(&rio_global_list_lock);
|
|
device_unregister(&rdev->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_del_device);
|
|
|
|
/**
|
|
* rio_request_inb_mbox - request inbound mailbox service
|
|
* @mport: RIO master port from which to allocate the mailbox resource
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox number to claim
|
|
* @entries: Number of entries in inbound mailbox queue
|
|
* @minb: Callback to execute when inbound message is received
|
|
*
|
|
* Requests ownership of an inbound mailbox resource and binds
|
|
* a callback function to the resource. Returns %0 on success.
|
|
*/
|
|
int rio_request_inb_mbox(struct rio_mport *mport,
|
|
void *dev_id,
|
|
int mbox,
|
|
int entries,
|
|
void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
|
|
int slot))
|
|
{
|
|
int rc = -ENOSYS;
|
|
struct resource *res;
|
|
|
|
if (!mport->ops->open_inb_mbox)
|
|
goto out;
|
|
|
|
res = kzalloc(sizeof(*res), GFP_KERNEL);
|
|
if (res) {
|
|
rio_init_mbox_res(res, mbox, mbox);
|
|
|
|
/* Make sure this mailbox isn't in use */
|
|
rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
|
|
res);
|
|
if (rc < 0) {
|
|
kfree(res);
|
|
goto out;
|
|
}
|
|
|
|
mport->inb_msg[mbox].res = res;
|
|
|
|
/* Hook the inbound message callback */
|
|
mport->inb_msg[mbox].mcback = minb;
|
|
|
|
rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries);
|
|
if (rc) {
|
|
mport->inb_msg[mbox].mcback = NULL;
|
|
mport->inb_msg[mbox].res = NULL;
|
|
release_resource(res);
|
|
kfree(res);
|
|
}
|
|
} else
|
|
rc = -ENOMEM;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
|
|
|
|
/**
|
|
* rio_release_inb_mbox - release inbound mailbox message service
|
|
* @mport: RIO master port from which to release the mailbox resource
|
|
* @mbox: Mailbox number to release
|
|
*
|
|
* Releases ownership of an inbound mailbox resource. Returns 0
|
|
* if the request has been satisfied.
|
|
*/
|
|
int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
int rc;
|
|
|
|
if (!mport->ops->close_inb_mbox || !mport->inb_msg[mbox].res)
|
|
return -EINVAL;
|
|
|
|
mport->ops->close_inb_mbox(mport, mbox);
|
|
mport->inb_msg[mbox].mcback = NULL;
|
|
|
|
rc = release_resource(mport->inb_msg[mbox].res);
|
|
if (rc)
|
|
return rc;
|
|
|
|
kfree(mport->inb_msg[mbox].res);
|
|
mport->inb_msg[mbox].res = NULL;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
|
|
|
|
/**
|
|
* rio_request_outb_mbox - request outbound mailbox service
|
|
* @mport: RIO master port from which to allocate the mailbox resource
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox number to claim
|
|
* @entries: Number of entries in outbound mailbox queue
|
|
* @moutb: Callback to execute when outbound message is sent
|
|
*
|
|
* Requests ownership of an outbound mailbox resource and binds
|
|
* a callback function to the resource. Returns 0 on success.
|
|
*/
|
|
int rio_request_outb_mbox(struct rio_mport *mport,
|
|
void *dev_id,
|
|
int mbox,
|
|
int entries,
|
|
void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
|
|
{
|
|
int rc = -ENOSYS;
|
|
struct resource *res;
|
|
|
|
if (!mport->ops->open_outb_mbox)
|
|
goto out;
|
|
|
|
res = kzalloc(sizeof(*res), GFP_KERNEL);
|
|
if (res) {
|
|
rio_init_mbox_res(res, mbox, mbox);
|
|
|
|
/* Make sure this outbound mailbox isn't in use */
|
|
rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
|
|
res);
|
|
if (rc < 0) {
|
|
kfree(res);
|
|
goto out;
|
|
}
|
|
|
|
mport->outb_msg[mbox].res = res;
|
|
|
|
/* Hook the inbound message callback */
|
|
mport->outb_msg[mbox].mcback = moutb;
|
|
|
|
rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries);
|
|
if (rc) {
|
|
mport->outb_msg[mbox].mcback = NULL;
|
|
mport->outb_msg[mbox].res = NULL;
|
|
release_resource(res);
|
|
kfree(res);
|
|
}
|
|
} else
|
|
rc = -ENOMEM;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
|
|
|
|
/**
|
|
* rio_release_outb_mbox - release outbound mailbox message service
|
|
* @mport: RIO master port from which to release the mailbox resource
|
|
* @mbox: Mailbox number to release
|
|
*
|
|
* Releases ownership of an inbound mailbox resource. Returns 0
|
|
* if the request has been satisfied.
|
|
*/
|
|
int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
int rc;
|
|
|
|
if (!mport->ops->close_outb_mbox || !mport->outb_msg[mbox].res)
|
|
return -EINVAL;
|
|
|
|
mport->ops->close_outb_mbox(mport, mbox);
|
|
mport->outb_msg[mbox].mcback = NULL;
|
|
|
|
rc = release_resource(mport->outb_msg[mbox].res);
|
|
if (rc)
|
|
return rc;
|
|
|
|
kfree(mport->outb_msg[mbox].res);
|
|
mport->outb_msg[mbox].res = NULL;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
|
|
|
|
/**
|
|
* rio_setup_inb_dbell - bind inbound doorbell callback
|
|
* @mport: RIO master port to bind the doorbell callback
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @res: Doorbell message resource
|
|
* @dinb: Callback to execute when doorbell is received
|
|
*
|
|
* Adds a doorbell resource/callback pair into a port's
|
|
* doorbell event list. Returns 0 if the request has been
|
|
* satisfied.
|
|
*/
|
|
static int
|
|
rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
|
|
void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
|
|
u16 info))
|
|
{
|
|
struct rio_dbell *dbell = kmalloc(sizeof(*dbell), GFP_KERNEL);
|
|
|
|
if (!dbell)
|
|
return -ENOMEM;
|
|
|
|
dbell->res = res;
|
|
dbell->dinb = dinb;
|
|
dbell->dev_id = dev_id;
|
|
|
|
mutex_lock(&mport->lock);
|
|
list_add_tail(&dbell->node, &mport->dbells);
|
|
mutex_unlock(&mport->lock);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rio_request_inb_dbell - request inbound doorbell message service
|
|
* @mport: RIO master port from which to allocate the doorbell resource
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @start: Doorbell info range start
|
|
* @end: Doorbell info range end
|
|
* @dinb: Callback to execute when doorbell is received
|
|
*
|
|
* Requests ownership of an inbound doorbell resource and binds
|
|
* a callback function to the resource. Returns 0 if the request
|
|
* has been satisfied.
|
|
*/
|
|
int rio_request_inb_dbell(struct rio_mport *mport,
|
|
void *dev_id,
|
|
u16 start,
|
|
u16 end,
|
|
void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
|
|
u16 dst, u16 info))
|
|
{
|
|
int rc;
|
|
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
|
|
|
|
if (res) {
|
|
rio_init_dbell_res(res, start, end);
|
|
|
|
/* Make sure these doorbells aren't in use */
|
|
rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
|
|
res);
|
|
if (rc < 0) {
|
|
kfree(res);
|
|
goto out;
|
|
}
|
|
|
|
/* Hook the doorbell callback */
|
|
rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
|
|
} else
|
|
rc = -ENOMEM;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
|
|
|
|
/**
|
|
* rio_release_inb_dbell - release inbound doorbell message service
|
|
* @mport: RIO master port from which to release the doorbell resource
|
|
* @start: Doorbell info range start
|
|
* @end: Doorbell info range end
|
|
*
|
|
* Releases ownership of an inbound doorbell resource and removes
|
|
* callback from the doorbell event list. Returns 0 if the request
|
|
* has been satisfied.
|
|
*/
|
|
int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
|
|
{
|
|
int rc = 0, found = 0;
|
|
struct rio_dbell *dbell;
|
|
|
|
mutex_lock(&mport->lock);
|
|
list_for_each_entry(dbell, &mport->dbells, node) {
|
|
if ((dbell->res->start == start) && (dbell->res->end == end)) {
|
|
list_del(&dbell->node);
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&mport->lock);
|
|
|
|
/* If we can't find an exact match, fail */
|
|
if (!found) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Release the doorbell resource */
|
|
rc = release_resource(dbell->res);
|
|
|
|
/* Free the doorbell event */
|
|
kfree(dbell);
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
|
|
|
|
/**
|
|
* rio_request_outb_dbell - request outbound doorbell message range
|
|
* @rdev: RIO device from which to allocate the doorbell resource
|
|
* @start: Doorbell message range start
|
|
* @end: Doorbell message range end
|
|
*
|
|
* Requests ownership of a doorbell message range. Returns a resource
|
|
* if the request has been satisfied or %NULL on failure.
|
|
*/
|
|
struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
|
|
u16 end)
|
|
{
|
|
struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL);
|
|
|
|
if (res) {
|
|
rio_init_dbell_res(res, start, end);
|
|
|
|
/* Make sure these doorbells aren't in use */
|
|
if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
|
|
< 0) {
|
|
kfree(res);
|
|
res = NULL;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
|
|
|
|
/**
|
|
* rio_release_outb_dbell - release outbound doorbell message range
|
|
* @rdev: RIO device from which to release the doorbell resource
|
|
* @res: Doorbell resource to be freed
|
|
*
|
|
* Releases ownership of a doorbell message range. Returns 0 if the
|
|
* request has been satisfied.
|
|
*/
|
|
int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
|
|
{
|
|
int rc = release_resource(res);
|
|
|
|
kfree(res);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
|
|
|
|
/**
|
|
* rio_add_mport_pw_handler - add port-write message handler into the list
|
|
* of mport specific pw handlers
|
|
* @mport: RIO master port to bind the portwrite callback
|
|
* @context: Handler specific context to pass on event
|
|
* @pwcback: Callback to execute when portwrite is received
|
|
*
|
|
* Returns 0 if the request has been satisfied.
|
|
*/
|
|
int rio_add_mport_pw_handler(struct rio_mport *mport, void *context,
|
|
int (*pwcback)(struct rio_mport *mport,
|
|
void *context, union rio_pw_msg *msg, int step))
|
|
{
|
|
struct rio_pwrite *pwrite = kzalloc(sizeof(*pwrite), GFP_KERNEL);
|
|
|
|
if (!pwrite)
|
|
return -ENOMEM;
|
|
|
|
pwrite->pwcback = pwcback;
|
|
pwrite->context = context;
|
|
mutex_lock(&mport->lock);
|
|
list_add_tail(&pwrite->node, &mport->pwrites);
|
|
mutex_unlock(&mport->lock);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_add_mport_pw_handler);
|
|
|
|
/**
|
|
* rio_del_mport_pw_handler - remove port-write message handler from the list
|
|
* of mport specific pw handlers
|
|
* @mport: RIO master port to bind the portwrite callback
|
|
* @context: Registered handler specific context to pass on event
|
|
* @pwcback: Registered callback function
|
|
*
|
|
* Returns 0 if the request has been satisfied.
|
|
*/
|
|
int rio_del_mport_pw_handler(struct rio_mport *mport, void *context,
|
|
int (*pwcback)(struct rio_mport *mport,
|
|
void *context, union rio_pw_msg *msg, int step))
|
|
{
|
|
int rc = -EINVAL;
|
|
struct rio_pwrite *pwrite;
|
|
|
|
mutex_lock(&mport->lock);
|
|
list_for_each_entry(pwrite, &mport->pwrites, node) {
|
|
if (pwrite->pwcback == pwcback && pwrite->context == context) {
|
|
list_del(&pwrite->node);
|
|
kfree(pwrite);
|
|
rc = 0;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&mport->lock);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_del_mport_pw_handler);
|
|
|
|
/**
|
|
* rio_request_inb_pwrite - request inbound port-write message service for
|
|
* specific RapidIO device
|
|
* @rdev: RIO device to which register inbound port-write callback routine
|
|
* @pwcback: Callback routine to execute when port-write is received
|
|
*
|
|
* Binds a port-write callback function to the RapidIO device.
|
|
* Returns 0 if the request has been satisfied.
|
|
*/
|
|
int rio_request_inb_pwrite(struct rio_dev *rdev,
|
|
int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step))
|
|
{
|
|
int rc = 0;
|
|
|
|
spin_lock(&rio_global_list_lock);
|
|
if (rdev->pwcback)
|
|
rc = -ENOMEM;
|
|
else
|
|
rdev->pwcback = pwcback;
|
|
|
|
spin_unlock(&rio_global_list_lock);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_inb_pwrite);
|
|
|
|
/**
|
|
* rio_release_inb_pwrite - release inbound port-write message service
|
|
* associated with specific RapidIO device
|
|
* @rdev: RIO device which registered for inbound port-write callback
|
|
*
|
|
* Removes callback from the rio_dev structure. Returns 0 if the request
|
|
* has been satisfied.
|
|
*/
|
|
int rio_release_inb_pwrite(struct rio_dev *rdev)
|
|
{
|
|
int rc = -ENOMEM;
|
|
|
|
spin_lock(&rio_global_list_lock);
|
|
if (rdev->pwcback) {
|
|
rdev->pwcback = NULL;
|
|
rc = 0;
|
|
}
|
|
|
|
spin_unlock(&rio_global_list_lock);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
|
|
|
|
/**
|
|
* rio_pw_enable - Enables/disables port-write handling by a master port
|
|
* @mport: Master port associated with port-write handling
|
|
* @enable: 1=enable, 0=disable
|
|
*/
|
|
void rio_pw_enable(struct rio_mport *mport, int enable)
|
|
{
|
|
if (mport->ops->pwenable) {
|
|
mutex_lock(&mport->lock);
|
|
|
|
if ((enable && ++mport->pwe_refcnt == 1) ||
|
|
(!enable && mport->pwe_refcnt && --mport->pwe_refcnt == 0))
|
|
mport->ops->pwenable(mport, enable);
|
|
mutex_unlock(&mport->lock);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_pw_enable);
|
|
|
|
/**
|
|
* rio_map_inb_region -- Map inbound memory region.
|
|
* @mport: Master port.
|
|
* @local: physical address of memory region to be mapped
|
|
* @rbase: RIO base address assigned to this window
|
|
* @size: Size of the memory region
|
|
* @rflags: Flags for mapping.
|
|
*
|
|
* Return: 0 -- Success.
|
|
*
|
|
* This function will create the mapping from RIO space to local memory.
|
|
*/
|
|
int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
|
|
u64 rbase, u32 size, u32 rflags)
|
|
{
|
|
int rc;
|
|
unsigned long flags;
|
|
|
|
if (!mport->ops->map_inb)
|
|
return -1;
|
|
spin_lock_irqsave(&rio_mmap_lock, flags);
|
|
rc = mport->ops->map_inb(mport, local, rbase, size, rflags);
|
|
spin_unlock_irqrestore(&rio_mmap_lock, flags);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_map_inb_region);
|
|
|
|
/**
|
|
* rio_unmap_inb_region -- Unmap the inbound memory region
|
|
* @mport: Master port
|
|
* @lstart: physical address of memory region to be unmapped
|
|
*/
|
|
void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart)
|
|
{
|
|
unsigned long flags;
|
|
if (!mport->ops->unmap_inb)
|
|
return;
|
|
spin_lock_irqsave(&rio_mmap_lock, flags);
|
|
mport->ops->unmap_inb(mport, lstart);
|
|
spin_unlock_irqrestore(&rio_mmap_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_unmap_inb_region);
|
|
|
|
/**
|
|
* rio_map_outb_region -- Map outbound memory region.
|
|
* @mport: Master port.
|
|
* @destid: destination id window points to
|
|
* @rbase: RIO base address window translates to
|
|
* @size: Size of the memory region
|
|
* @rflags: Flags for mapping.
|
|
* @local: physical address of memory region mapped
|
|
*
|
|
* Return: 0 -- Success.
|
|
*
|
|
* This function will create the mapping from RIO space to local memory.
|
|
*/
|
|
int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase,
|
|
u32 size, u32 rflags, dma_addr_t *local)
|
|
{
|
|
int rc;
|
|
unsigned long flags;
|
|
|
|
if (!mport->ops->map_outb)
|
|
return -ENODEV;
|
|
|
|
spin_lock_irqsave(&rio_mmap_lock, flags);
|
|
rc = mport->ops->map_outb(mport, destid, rbase, size,
|
|
rflags, local);
|
|
spin_unlock_irqrestore(&rio_mmap_lock, flags);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_map_outb_region);
|
|
|
|
/**
|
|
* rio_unmap_outb_region -- Unmap the inbound memory region
|
|
* @mport: Master port
|
|
* @destid: destination id mapping points to
|
|
* @rstart: RIO base address window translates to
|
|
*/
|
|
void rio_unmap_outb_region(struct rio_mport *mport, u16 destid, u64 rstart)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!mport->ops->unmap_outb)
|
|
return;
|
|
|
|
spin_lock_irqsave(&rio_mmap_lock, flags);
|
|
mport->ops->unmap_outb(mport, destid, rstart);
|
|
spin_unlock_irqrestore(&rio_mmap_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_unmap_outb_region);
|
|
|
|
/**
|
|
* rio_mport_get_physefb - Helper function that returns register offset
|
|
* for Physical Layer Extended Features Block.
|
|
* @port: Master port to issue transaction
|
|
* @local: Indicate a local master port or remote device access
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @rmap: pointer to location to store register map type info
|
|
*/
|
|
u32
|
|
rio_mport_get_physefb(struct rio_mport *port, int local,
|
|
u16 destid, u8 hopcount, u32 *rmap)
|
|
{
|
|
u32 ext_ftr_ptr;
|
|
u32 ftr_header;
|
|
|
|
ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0);
|
|
|
|
while (ext_ftr_ptr) {
|
|
if (local)
|
|
rio_local_read_config_32(port, ext_ftr_ptr,
|
|
&ftr_header);
|
|
else
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
ext_ftr_ptr, &ftr_header);
|
|
|
|
ftr_header = RIO_GET_BLOCK_ID(ftr_header);
|
|
switch (ftr_header) {
|
|
|
|
case RIO_EFB_SER_EP_ID:
|
|
case RIO_EFB_SER_EP_REC_ID:
|
|
case RIO_EFB_SER_EP_FREE_ID:
|
|
case RIO_EFB_SER_EP_M1_ID:
|
|
case RIO_EFB_SER_EP_SW_M1_ID:
|
|
case RIO_EFB_SER_EPF_M1_ID:
|
|
case RIO_EFB_SER_EPF_SW_M1_ID:
|
|
*rmap = 1;
|
|
return ext_ftr_ptr;
|
|
|
|
case RIO_EFB_SER_EP_M2_ID:
|
|
case RIO_EFB_SER_EP_SW_M2_ID:
|
|
case RIO_EFB_SER_EPF_M2_ID:
|
|
case RIO_EFB_SER_EPF_SW_M2_ID:
|
|
*rmap = 2;
|
|
return ext_ftr_ptr;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ext_ftr_ptr = rio_mport_get_efb(port, local, destid,
|
|
hopcount, ext_ftr_ptr);
|
|
}
|
|
|
|
return ext_ftr_ptr;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_mport_get_physefb);
|
|
|
|
/**
|
|
* rio_get_comptag - Begin or continue searching for a RIO device by component tag
|
|
* @comp_tag: RIO component tag to match
|
|
* @from: Previous RIO device found in search, or %NULL for new search
|
|
*
|
|
* Iterates through the list of known RIO devices. If a RIO device is
|
|
* found with a matching @comp_tag, a pointer to its device
|
|
* structure is returned. Otherwise, %NULL is returned. A new search
|
|
* is initiated by passing %NULL to the @from argument. Otherwise, if
|
|
* @from is not %NULL, searches continue from next device on the global
|
|
* list.
|
|
*/
|
|
struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from)
|
|
{
|
|
struct list_head *n;
|
|
struct rio_dev *rdev;
|
|
|
|
spin_lock(&rio_global_list_lock);
|
|
n = from ? from->global_list.next : rio_devices.next;
|
|
|
|
while (n && (n != &rio_devices)) {
|
|
rdev = rio_dev_g(n);
|
|
if (rdev->comp_tag == comp_tag)
|
|
goto exit;
|
|
n = n->next;
|
|
}
|
|
rdev = NULL;
|
|
exit:
|
|
spin_unlock(&rio_global_list_lock);
|
|
return rdev;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_get_comptag);
|
|
|
|
/**
|
|
* rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
|
|
* @rdev: Pointer to RIO device control structure
|
|
* @pnum: Switch port number to set LOCKOUT bit
|
|
* @lock: Operation : set (=1) or clear (=0)
|
|
*/
|
|
int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock)
|
|
{
|
|
u32 regval;
|
|
|
|
rio_read_config_32(rdev,
|
|
RIO_DEV_PORT_N_CTL_CSR(rdev, pnum),
|
|
®val);
|
|
if (lock)
|
|
regval |= RIO_PORT_N_CTL_LOCKOUT;
|
|
else
|
|
regval &= ~RIO_PORT_N_CTL_LOCKOUT;
|
|
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_CTL_CSR(rdev, pnum),
|
|
regval);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_set_port_lockout);
|
|
|
|
/**
|
|
* rio_enable_rx_tx_port - enable input receiver and output transmitter of
|
|
* given port
|
|
* @port: Master port associated with the RIO network
|
|
* @local: local=1 select local port otherwise a far device is reached
|
|
* @destid: Destination ID of the device to check host bit
|
|
* @hopcount: Number of hops to reach the target
|
|
* @port_num: Port (-number on switch) to enable on a far end device
|
|
*
|
|
* Returns 0 or 1 from on General Control Command and Status Register
|
|
* (EXT_PTR+0x3C)
|
|
*/
|
|
int rio_enable_rx_tx_port(struct rio_mport *port,
|
|
int local, u16 destid,
|
|
u8 hopcount, u8 port_num)
|
|
{
|
|
#ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS
|
|
u32 regval;
|
|
u32 ext_ftr_ptr;
|
|
u32 rmap;
|
|
|
|
/*
|
|
* enable rx input tx output port
|
|
*/
|
|
pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = "
|
|
"%d, port_num = %d)\n", local, destid, hopcount, port_num);
|
|
|
|
ext_ftr_ptr = rio_mport_get_physefb(port, local, destid,
|
|
hopcount, &rmap);
|
|
|
|
if (local) {
|
|
rio_local_read_config_32(port,
|
|
ext_ftr_ptr + RIO_PORT_N_CTL_CSR(0, rmap),
|
|
®val);
|
|
} else {
|
|
if (rio_mport_read_config_32(port, destid, hopcount,
|
|
ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num, rmap),
|
|
®val) < 0)
|
|
return -EIO;
|
|
}
|
|
|
|
regval = regval | RIO_PORT_N_CTL_EN_RX | RIO_PORT_N_CTL_EN_TX;
|
|
|
|
if (local) {
|
|
rio_local_write_config_32(port,
|
|
ext_ftr_ptr + RIO_PORT_N_CTL_CSR(0, rmap), regval);
|
|
} else {
|
|
if (rio_mport_write_config_32(port, destid, hopcount,
|
|
ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num, rmap),
|
|
regval) < 0)
|
|
return -EIO;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port);
|
|
|
|
|
|
/**
|
|
* rio_chk_dev_route - Validate route to the specified device.
|
|
* @rdev: RIO device failed to respond
|
|
* @nrdev: Last active device on the route to rdev
|
|
* @npnum: nrdev's port number on the route to rdev
|
|
*
|
|
* Follows a route to the specified RIO device to determine the last available
|
|
* device (and corresponding RIO port) on the route.
|
|
*/
|
|
static int
|
|
rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
|
|
{
|
|
u32 result;
|
|
int p_port, rc = -EIO;
|
|
struct rio_dev *prev = NULL;
|
|
|
|
/* Find switch with failed RIO link */
|
|
while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) {
|
|
if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) {
|
|
prev = rdev->prev;
|
|
break;
|
|
}
|
|
rdev = rdev->prev;
|
|
}
|
|
|
|
if (!prev)
|
|
goto err_out;
|
|
|
|
p_port = prev->rswitch->route_table[rdev->destid];
|
|
|
|
if (p_port != RIO_INVALID_ROUTE) {
|
|
pr_debug("RIO: link failed on [%s]-P%d\n",
|
|
rio_name(prev), p_port);
|
|
*nrdev = prev;
|
|
*npnum = p_port;
|
|
rc = 0;
|
|
} else
|
|
pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev));
|
|
err_out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* rio_mport_chk_dev_access - Validate access to the specified device.
|
|
* @mport: Master port to send transactions
|
|
* @destid: Device destination ID in network
|
|
* @hopcount: Number of hops into the network
|
|
*/
|
|
int
|
|
rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount)
|
|
{
|
|
int i = 0;
|
|
u32 tmp;
|
|
|
|
while (rio_mport_read_config_32(mport, destid, hopcount,
|
|
RIO_DEV_ID_CAR, &tmp)) {
|
|
i++;
|
|
if (i == RIO_MAX_CHK_RETRY)
|
|
return -EIO;
|
|
mdelay(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access);
|
|
|
|
/**
|
|
* rio_chk_dev_access - Validate access to the specified device.
|
|
* @rdev: Pointer to RIO device control structure
|
|
*/
|
|
static int rio_chk_dev_access(struct rio_dev *rdev)
|
|
{
|
|
return rio_mport_chk_dev_access(rdev->net->hport,
|
|
rdev->destid, rdev->hopcount);
|
|
}
|
|
|
|
/**
|
|
* rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
|
|
* returns link-response (if requested).
|
|
* @rdev: RIO devive to issue Input-status command
|
|
* @pnum: Device port number to issue the command
|
|
* @lnkresp: Response from a link partner
|
|
*/
|
|
static int
|
|
rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
|
|
{
|
|
u32 regval;
|
|
int checkcount;
|
|
|
|
if (lnkresp) {
|
|
/* Read from link maintenance response register
|
|
* to clear valid bit */
|
|
rio_read_config_32(rdev,
|
|
RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum),
|
|
®val);
|
|
udelay(50);
|
|
}
|
|
|
|
/* Issue Input-status command */
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_MNT_REQ_CSR(rdev, pnum),
|
|
RIO_MNT_REQ_CMD_IS);
|
|
|
|
/* Exit if the response is not expected */
|
|
if (!lnkresp)
|
|
return 0;
|
|
|
|
checkcount = 3;
|
|
while (checkcount--) {
|
|
udelay(50);
|
|
rio_read_config_32(rdev,
|
|
RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum),
|
|
®val);
|
|
if (regval & RIO_PORT_N_MNT_RSP_RVAL) {
|
|
*lnkresp = regval;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
/**
|
|
* rio_clr_err_stopped - Clears port Error-stopped states.
|
|
* @rdev: Pointer to RIO device control structure
|
|
* @pnum: Switch port number to clear errors
|
|
* @err_status: port error status (if 0 reads register from device)
|
|
*
|
|
* TODO: Currently this routine is not compatible with recovery process
|
|
* specified for idt_gen3 RapidIO switch devices. It has to be reviewed
|
|
* to implement universal recovery process that is compatible full range
|
|
* off available devices.
|
|
* IDT gen3 switch driver now implements HW-specific error handler that
|
|
* issues soft port reset to the port to reset ERR_STOP bits and ackIDs.
|
|
*/
|
|
static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status)
|
|
{
|
|
struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum];
|
|
u32 regval;
|
|
u32 far_ackid, far_linkstat, near_ackid;
|
|
|
|
if (err_status == 0)
|
|
rio_read_config_32(rdev,
|
|
RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum),
|
|
&err_status);
|
|
|
|
if (err_status & RIO_PORT_N_ERR_STS_OUT_ES) {
|
|
pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
|
|
/*
|
|
* Send a Link-Request/Input-Status control symbol
|
|
*/
|
|
if (rio_get_input_status(rdev, pnum, ®val)) {
|
|
pr_debug("RIO_EM: Input-status response timeout\n");
|
|
goto rd_err;
|
|
}
|
|
|
|
pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
|
|
pnum, regval);
|
|
far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5;
|
|
far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT;
|
|
rio_read_config_32(rdev,
|
|
RIO_DEV_PORT_N_ACK_STS_CSR(rdev, pnum),
|
|
®val);
|
|
pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval);
|
|
near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24;
|
|
pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
|
|
" near_ackID=0x%02x\n",
|
|
pnum, far_ackid, far_linkstat, near_ackid);
|
|
|
|
/*
|
|
* If required, synchronize ackIDs of near and
|
|
* far sides.
|
|
*/
|
|
if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) ||
|
|
(far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) {
|
|
/* Align near outstanding/outbound ackIDs with
|
|
* far inbound.
|
|
*/
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_ACK_STS_CSR(rdev, pnum),
|
|
(near_ackid << 24) |
|
|
(far_ackid << 8) | far_ackid);
|
|
/* Align far outstanding/outbound ackIDs with
|
|
* near inbound.
|
|
*/
|
|
far_ackid++;
|
|
if (!nextdev) {
|
|
pr_debug("RIO_EM: nextdev pointer == NULL\n");
|
|
goto rd_err;
|
|
}
|
|
|
|
rio_write_config_32(nextdev,
|
|
RIO_DEV_PORT_N_ACK_STS_CSR(nextdev,
|
|
RIO_GET_PORT_NUM(nextdev->swpinfo)),
|
|
(far_ackid << 24) |
|
|
(near_ackid << 8) | near_ackid);
|
|
}
|
|
rd_err:
|
|
rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum),
|
|
&err_status);
|
|
pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
|
|
}
|
|
|
|
if ((err_status & RIO_PORT_N_ERR_STS_INP_ES) && nextdev) {
|
|
pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
|
|
rio_get_input_status(nextdev,
|
|
RIO_GET_PORT_NUM(nextdev->swpinfo), NULL);
|
|
udelay(50);
|
|
|
|
rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum),
|
|
&err_status);
|
|
pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
|
|
}
|
|
|
|
return (err_status & (RIO_PORT_N_ERR_STS_OUT_ES |
|
|
RIO_PORT_N_ERR_STS_INP_ES)) ? 1 : 0;
|
|
}
|
|
|
|
/**
|
|
* rio_inb_pwrite_handler - inbound port-write message handler
|
|
* @mport: mport device associated with port-write
|
|
* @pw_msg: pointer to inbound port-write message
|
|
*
|
|
* Processes an inbound port-write message. Returns 0 if the request
|
|
* has been satisfied.
|
|
*/
|
|
int rio_inb_pwrite_handler(struct rio_mport *mport, union rio_pw_msg *pw_msg)
|
|
{
|
|
struct rio_dev *rdev;
|
|
u32 err_status, em_perrdet, em_ltlerrdet;
|
|
int rc, portnum;
|
|
struct rio_pwrite *pwrite;
|
|
|
|
#ifdef DEBUG_PW
|
|
{
|
|
u32 i;
|
|
|
|
pr_debug("%s: PW to mport_%d:\n", __func__, mport->id);
|
|
for (i = 0; i < RIO_PW_MSG_SIZE / sizeof(u32); i = i + 4) {
|
|
pr_debug("0x%02x: %08x %08x %08x %08x\n",
|
|
i * 4, pw_msg->raw[i], pw_msg->raw[i + 1],
|
|
pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL);
|
|
if (rdev) {
|
|
pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
|
|
} else {
|
|
pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
|
|
__func__, pw_msg->em.comptag);
|
|
}
|
|
|
|
/* Call a device-specific handler (if it is registered for the device).
|
|
* This may be the service for endpoints that send device-specific
|
|
* port-write messages. End-point messages expected to be handled
|
|
* completely by EP specific device driver.
|
|
* For switches rc==0 signals that no standard processing required.
|
|
*/
|
|
if (rdev && rdev->pwcback) {
|
|
rc = rdev->pwcback(rdev, pw_msg, 0);
|
|
if (rc == 0)
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&mport->lock);
|
|
list_for_each_entry(pwrite, &mport->pwrites, node)
|
|
pwrite->pwcback(mport, pwrite->context, pw_msg, 0);
|
|
mutex_unlock(&mport->lock);
|
|
|
|
if (!rdev)
|
|
return 0;
|
|
|
|
/*
|
|
* FIXME: The code below stays as it was before for now until we decide
|
|
* how to do default PW handling in combination with per-mport callbacks
|
|
*/
|
|
|
|
portnum = pw_msg->em.is_port & 0xFF;
|
|
|
|
/* Check if device and route to it are functional:
|
|
* Sometimes devices may send PW message(s) just before being
|
|
* powered down (or link being lost).
|
|
*/
|
|
if (rio_chk_dev_access(rdev)) {
|
|
pr_debug("RIO: device access failed - get link partner\n");
|
|
/* Scan route to the device and identify failed link.
|
|
* This will replace device and port reported in PW message.
|
|
* PW message should not be used after this point.
|
|
*/
|
|
if (rio_chk_dev_route(rdev, &rdev, &portnum)) {
|
|
pr_err("RIO: Route trace for %s failed\n",
|
|
rio_name(rdev));
|
|
return -EIO;
|
|
}
|
|
pw_msg = NULL;
|
|
}
|
|
|
|
/* For End-point devices processing stops here */
|
|
if (!(rdev->pef & RIO_PEF_SWITCH))
|
|
return 0;
|
|
|
|
if (rdev->phys_efptr == 0) {
|
|
pr_err("RIO_PW: Bad switch initialization for %s\n",
|
|
rio_name(rdev));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Process the port-write notification from switch
|
|
*/
|
|
if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle)
|
|
rdev->rswitch->ops->em_handle(rdev, portnum);
|
|
|
|
rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum),
|
|
&err_status);
|
|
pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status);
|
|
|
|
if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) {
|
|
|
|
if (!(rdev->rswitch->port_ok & (1 << portnum))) {
|
|
rdev->rswitch->port_ok |= (1 << portnum);
|
|
rio_set_port_lockout(rdev, portnum, 0);
|
|
/* Schedule Insertion Service */
|
|
pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
|
|
rio_name(rdev), portnum);
|
|
}
|
|
|
|
/* Clear error-stopped states (if reported).
|
|
* Depending on the link partner state, two attempts
|
|
* may be needed for successful recovery.
|
|
*/
|
|
if (err_status & (RIO_PORT_N_ERR_STS_OUT_ES |
|
|
RIO_PORT_N_ERR_STS_INP_ES)) {
|
|
if (rio_clr_err_stopped(rdev, portnum, err_status))
|
|
rio_clr_err_stopped(rdev, portnum, 0);
|
|
}
|
|
} else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
|
|
|
|
if (rdev->rswitch->port_ok & (1 << portnum)) {
|
|
rdev->rswitch->port_ok &= ~(1 << portnum);
|
|
rio_set_port_lockout(rdev, portnum, 1);
|
|
|
|
if (rdev->phys_rmap == 1) {
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_ACK_STS_CSR(rdev, portnum),
|
|
RIO_PORT_N_ACK_CLEAR);
|
|
} else {
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_OB_ACK_CSR(rdev, portnum),
|
|
RIO_PORT_N_OB_ACK_CLEAR);
|
|
rio_write_config_32(rdev,
|
|
RIO_DEV_PORT_N_IB_ACK_CSR(rdev, portnum),
|
|
0);
|
|
}
|
|
|
|
/* Schedule Extraction Service */
|
|
pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
|
|
rio_name(rdev), portnum);
|
|
}
|
|
}
|
|
|
|
rio_read_config_32(rdev,
|
|
rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);
|
|
if (em_perrdet) {
|
|
pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
|
|
portnum, em_perrdet);
|
|
/* Clear EM Port N Error Detect CSR */
|
|
rio_write_config_32(rdev,
|
|
rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);
|
|
}
|
|
|
|
rio_read_config_32(rdev,
|
|
rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);
|
|
if (em_ltlerrdet) {
|
|
pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
|
|
em_ltlerrdet);
|
|
/* Clear EM L/T Layer Error Detect CSR */
|
|
rio_write_config_32(rdev,
|
|
rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
|
|
}
|
|
|
|
/* Clear remaining error bits and Port-Write Pending bit */
|
|
rio_write_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum),
|
|
err_status);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler);
|
|
|
|
/**
|
|
* rio_mport_get_efb - get pointer to next extended features block
|
|
* @port: Master port to issue transaction
|
|
* @local: Indicate a local master port or remote device access
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @from: Offset of current Extended Feature block header (if 0 starts
|
|
* from ExtFeaturePtr)
|
|
*/
|
|
u32
|
|
rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
|
|
u8 hopcount, u32 from)
|
|
{
|
|
u32 reg_val;
|
|
|
|
if (from == 0) {
|
|
if (local)
|
|
rio_local_read_config_32(port, RIO_ASM_INFO_CAR,
|
|
®_val);
|
|
else
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
RIO_ASM_INFO_CAR, ®_val);
|
|
return reg_val & RIO_EXT_FTR_PTR_MASK;
|
|
} else {
|
|
if (local)
|
|
rio_local_read_config_32(port, from, ®_val);
|
|
else
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
from, ®_val);
|
|
return RIO_GET_BLOCK_ID(reg_val);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_mport_get_efb);
|
|
|
|
/**
|
|
* rio_mport_get_feature - query for devices' extended features
|
|
* @port: Master port to issue transaction
|
|
* @local: Indicate a local master port or remote device access
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @ftr: Extended feature code
|
|
*
|
|
* Tell if a device supports a given RapidIO capability.
|
|
* Returns the offset of the requested extended feature
|
|
* block within the device's RIO configuration space or
|
|
* 0 in case the device does not support it.
|
|
*/
|
|
u32
|
|
rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
|
|
u8 hopcount, int ftr)
|
|
{
|
|
u32 asm_info, ext_ftr_ptr, ftr_header;
|
|
|
|
if (local)
|
|
rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
|
|
else
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
RIO_ASM_INFO_CAR, &asm_info);
|
|
|
|
ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
|
|
|
|
while (ext_ftr_ptr) {
|
|
if (local)
|
|
rio_local_read_config_32(port, ext_ftr_ptr,
|
|
&ftr_header);
|
|
else
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
ext_ftr_ptr, &ftr_header);
|
|
if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
|
|
return ext_ftr_ptr;
|
|
|
|
ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header);
|
|
if (!ext_ftr_ptr)
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_mport_get_feature);
|
|
|
|
/**
|
|
* rio_std_route_add_entry - Add switch route table entry using standard
|
|
* registers defined in RIO specification rev.1.3
|
|
* @mport: Master port to issue transaction
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @table: routing table ID (global or port-specific)
|
|
* @route_destid: destID entry in the RT
|
|
* @route_port: destination port for specified destID
|
|
*/
|
|
static int
|
|
rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table, u16 route_destid, u8 route_port)
|
|
{
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_DESTID_SEL_CSR,
|
|
(u32)route_destid);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_PORT_SEL_CSR,
|
|
(u32)route_port);
|
|
}
|
|
|
|
udelay(10);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rio_std_route_get_entry - Read switch route table entry (port number)
|
|
* associated with specified destID using standard registers defined in RIO
|
|
* specification rev.1.3
|
|
* @mport: Master port to issue transaction
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @table: routing table ID (global or port-specific)
|
|
* @route_destid: destID entry in the RT
|
|
* @route_port: returned destination port for specified destID
|
|
*/
|
|
static int
|
|
rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table, u16 route_destid, u8 *route_port)
|
|
{
|
|
u32 result;
|
|
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
|
|
|
|
*route_port = (u8)result;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rio_std_route_clr_table - Clear swotch route table using standard registers
|
|
* defined in RIO specification rev.1.3.
|
|
* @mport: Master port to issue transaction
|
|
* @destid: Destination ID of the device
|
|
* @hopcount: Number of switch hops to the device
|
|
* @table: routing table ID (global or port-specific)
|
|
*/
|
|
static int
|
|
rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table)
|
|
{
|
|
u32 max_destid = 0xff;
|
|
u32 i, pef, id_inc = 1, ext_cfg = 0;
|
|
u32 port_sel = RIO_INVALID_ROUTE;
|
|
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
RIO_PEF_CAR, &pef);
|
|
|
|
if (mport->sys_size) {
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
RIO_SWITCH_RT_LIMIT,
|
|
&max_destid);
|
|
max_destid &= RIO_RT_MAX_DESTID;
|
|
}
|
|
|
|
if (pef & RIO_PEF_EXT_RT) {
|
|
ext_cfg = 0x80000000;
|
|
id_inc = 4;
|
|
port_sel = (RIO_INVALID_ROUTE << 24) |
|
|
(RIO_INVALID_ROUTE << 16) |
|
|
(RIO_INVALID_ROUTE << 8) |
|
|
RIO_INVALID_ROUTE;
|
|
}
|
|
|
|
for (i = 0; i <= max_destid;) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_DESTID_SEL_CSR,
|
|
ext_cfg | i);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
RIO_STD_RTE_CONF_PORT_SEL_CSR,
|
|
port_sel);
|
|
i += id_inc;
|
|
}
|
|
}
|
|
|
|
udelay(10);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rio_lock_device - Acquires host device lock for specified device
|
|
* @port: Master port to send transaction
|
|
* @destid: Destination ID for device/switch
|
|
* @hopcount: Hopcount to reach switch
|
|
* @wait_ms: Max wait time in msec (0 = no timeout)
|
|
*
|
|
* Attepts to acquire host device lock for specified device
|
|
* Returns 0 if device lock acquired or EINVAL if timeout expires.
|
|
*/
|
|
int rio_lock_device(struct rio_mport *port, u16 destid,
|
|
u8 hopcount, int wait_ms)
|
|
{
|
|
u32 result;
|
|
int tcnt = 0;
|
|
|
|
/* Attempt to acquire device lock */
|
|
rio_mport_write_config_32(port, destid, hopcount,
|
|
RIO_HOST_DID_LOCK_CSR, port->host_deviceid);
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
RIO_HOST_DID_LOCK_CSR, &result);
|
|
|
|
while (result != port->host_deviceid) {
|
|
if (wait_ms != 0 && tcnt == wait_ms) {
|
|
pr_debug("RIO: timeout when locking device %x:%x\n",
|
|
destid, hopcount);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Delay a bit */
|
|
mdelay(1);
|
|
tcnt++;
|
|
/* Try to acquire device lock again */
|
|
rio_mport_write_config_32(port, destid,
|
|
hopcount,
|
|
RIO_HOST_DID_LOCK_CSR,
|
|
port->host_deviceid);
|
|
rio_mport_read_config_32(port, destid,
|
|
hopcount,
|
|
RIO_HOST_DID_LOCK_CSR, &result);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_lock_device);
|
|
|
|
/**
|
|
* rio_unlock_device - Releases host device lock for specified device
|
|
* @port: Master port to send transaction
|
|
* @destid: Destination ID for device/switch
|
|
* @hopcount: Hopcount to reach switch
|
|
*
|
|
* Returns 0 if device lock released or EINVAL if fails.
|
|
*/
|
|
int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount)
|
|
{
|
|
u32 result;
|
|
|
|
/* Release device lock */
|
|
rio_mport_write_config_32(port, destid,
|
|
hopcount,
|
|
RIO_HOST_DID_LOCK_CSR,
|
|
port->host_deviceid);
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
RIO_HOST_DID_LOCK_CSR, &result);
|
|
if ((result & 0xffff) != 0xffff) {
|
|
pr_debug("RIO: badness when releasing device lock %x:%x\n",
|
|
destid, hopcount);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_unlock_device);
|
|
|
|
/**
|
|
* rio_route_add_entry- Add a route entry to a switch routing table
|
|
* @rdev: RIO device
|
|
* @table: Routing table ID
|
|
* @route_destid: Destination ID to be routed
|
|
* @route_port: Port number to be routed
|
|
* @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
|
|
*
|
|
* If available calls the switch specific add_entry() method to add a route
|
|
* entry into a switch routing table. Otherwise uses standard RT update method
|
|
* as defined by RapidIO specification. A specific routing table can be selected
|
|
* using the @table argument if a switch has per port routing tables or
|
|
* the standard (or global) table may be used by passing
|
|
* %RIO_GLOBAL_TABLE in @table.
|
|
*
|
|
* Returns %0 on success or %-EINVAL on failure.
|
|
*/
|
|
int rio_route_add_entry(struct rio_dev *rdev,
|
|
u16 table, u16 route_destid, u8 route_port, int lock)
|
|
{
|
|
int rc = -EINVAL;
|
|
struct rio_switch_ops *ops = rdev->rswitch->ops;
|
|
|
|
if (lock) {
|
|
rc = rio_lock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, 1000);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
spin_lock(&rdev->rswitch->lock);
|
|
|
|
if (!ops || !ops->add_entry) {
|
|
rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table,
|
|
route_destid, route_port);
|
|
} else if (try_module_get(ops->owner)) {
|
|
rc = ops->add_entry(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table, route_destid,
|
|
route_port);
|
|
module_put(ops->owner);
|
|
}
|
|
|
|
spin_unlock(&rdev->rswitch->lock);
|
|
|
|
if (lock)
|
|
rio_unlock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_route_add_entry);
|
|
|
|
/**
|
|
* rio_route_get_entry- Read an entry from a switch routing table
|
|
* @rdev: RIO device
|
|
* @table: Routing table ID
|
|
* @route_destid: Destination ID to be routed
|
|
* @route_port: Pointer to read port number into
|
|
* @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
|
|
*
|
|
* If available calls the switch specific get_entry() method to fetch a route
|
|
* entry from a switch routing table. Otherwise uses standard RT read method
|
|
* as defined by RapidIO specification. A specific routing table can be selected
|
|
* using the @table argument if a switch has per port routing tables or
|
|
* the standard (or global) table may be used by passing
|
|
* %RIO_GLOBAL_TABLE in @table.
|
|
*
|
|
* Returns %0 on success or %-EINVAL on failure.
|
|
*/
|
|
int rio_route_get_entry(struct rio_dev *rdev, u16 table,
|
|
u16 route_destid, u8 *route_port, int lock)
|
|
{
|
|
int rc = -EINVAL;
|
|
struct rio_switch_ops *ops = rdev->rswitch->ops;
|
|
|
|
if (lock) {
|
|
rc = rio_lock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, 1000);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
spin_lock(&rdev->rswitch->lock);
|
|
|
|
if (!ops || !ops->get_entry) {
|
|
rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table,
|
|
route_destid, route_port);
|
|
} else if (try_module_get(ops->owner)) {
|
|
rc = ops->get_entry(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table, route_destid,
|
|
route_port);
|
|
module_put(ops->owner);
|
|
}
|
|
|
|
spin_unlock(&rdev->rswitch->lock);
|
|
|
|
if (lock)
|
|
rio_unlock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_route_get_entry);
|
|
|
|
/**
|
|
* rio_route_clr_table - Clear a switch routing table
|
|
* @rdev: RIO device
|
|
* @table: Routing table ID
|
|
* @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock)
|
|
*
|
|
* If available calls the switch specific clr_table() method to clear a switch
|
|
* routing table. Otherwise uses standard RT write method as defined by RapidIO
|
|
* specification. A specific routing table can be selected using the @table
|
|
* argument if a switch has per port routing tables or the standard (or global)
|
|
* table may be used by passing %RIO_GLOBAL_TABLE in @table.
|
|
*
|
|
* Returns %0 on success or %-EINVAL on failure.
|
|
*/
|
|
int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock)
|
|
{
|
|
int rc = -EINVAL;
|
|
struct rio_switch_ops *ops = rdev->rswitch->ops;
|
|
|
|
if (lock) {
|
|
rc = rio_lock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, 1000);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
spin_lock(&rdev->rswitch->lock);
|
|
|
|
if (!ops || !ops->clr_table) {
|
|
rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table);
|
|
} else if (try_module_get(ops->owner)) {
|
|
rc = ops->clr_table(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount, table);
|
|
|
|
module_put(ops->owner);
|
|
}
|
|
|
|
spin_unlock(&rdev->rswitch->lock);
|
|
|
|
if (lock)
|
|
rio_unlock_device(rdev->net->hport, rdev->destid,
|
|
rdev->hopcount);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_route_clr_table);
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
|
|
static bool rio_chan_filter(struct dma_chan *chan, void *arg)
|
|
{
|
|
struct rio_mport *mport = arg;
|
|
|
|
/* Check that DMA device belongs to the right MPORT */
|
|
return mport == container_of(chan->device, struct rio_mport, dma);
|
|
}
|
|
|
|
/**
|
|
* rio_request_mport_dma - request RapidIO capable DMA channel associated
|
|
* with specified local RapidIO mport device.
|
|
* @mport: RIO mport to perform DMA data transfers
|
|
*
|
|
* Returns pointer to allocated DMA channel or NULL if failed.
|
|
*/
|
|
struct dma_chan *rio_request_mport_dma(struct rio_mport *mport)
|
|
{
|
|
dma_cap_mask_t mask;
|
|
|
|
dma_cap_zero(mask);
|
|
dma_cap_set(DMA_SLAVE, mask);
|
|
return dma_request_channel(mask, rio_chan_filter, mport);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_mport_dma);
|
|
|
|
/**
|
|
* rio_request_dma - request RapidIO capable DMA channel that supports
|
|
* specified target RapidIO device.
|
|
* @rdev: RIO device associated with DMA transfer
|
|
*
|
|
* Returns pointer to allocated DMA channel or NULL if failed.
|
|
*/
|
|
struct dma_chan *rio_request_dma(struct rio_dev *rdev)
|
|
{
|
|
return rio_request_mport_dma(rdev->net->hport);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_request_dma);
|
|
|
|
/**
|
|
* rio_release_dma - release specified DMA channel
|
|
* @dchan: DMA channel to release
|
|
*/
|
|
void rio_release_dma(struct dma_chan *dchan)
|
|
{
|
|
dma_release_channel(dchan);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_release_dma);
|
|
|
|
/**
|
|
* rio_dma_prep_xfer - RapidIO specific wrapper
|
|
* for device_prep_slave_sg callback defined by DMAENGINE.
|
|
* @dchan: DMA channel to configure
|
|
* @destid: target RapidIO device destination ID
|
|
* @data: RIO specific data descriptor
|
|
* @direction: DMA data transfer direction (TO or FROM the device)
|
|
* @flags: dmaengine defined flags
|
|
*
|
|
* Initializes RapidIO capable DMA channel for the specified data transfer.
|
|
* Uses DMA channel private extension to pass information related to remote
|
|
* target RIO device.
|
|
*
|
|
* Returns: pointer to DMA transaction descriptor if successful,
|
|
* error-valued pointer or NULL if failed.
|
|
*/
|
|
struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan,
|
|
u16 destid, struct rio_dma_data *data,
|
|
enum dma_transfer_direction direction, unsigned long flags)
|
|
{
|
|
struct rio_dma_ext rio_ext;
|
|
|
|
if (!dchan->device->device_prep_slave_sg) {
|
|
pr_err("%s: prep_rio_sg == NULL\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
rio_ext.destid = destid;
|
|
rio_ext.rio_addr_u = data->rio_addr_u;
|
|
rio_ext.rio_addr = data->rio_addr;
|
|
rio_ext.wr_type = data->wr_type;
|
|
|
|
return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,
|
|
direction, flags, &rio_ext);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_dma_prep_xfer);
|
|
|
|
/**
|
|
* rio_dma_prep_slave_sg - RapidIO specific wrapper
|
|
* for device_prep_slave_sg callback defined by DMAENGINE.
|
|
* @rdev: RIO device control structure
|
|
* @dchan: DMA channel to configure
|
|
* @data: RIO specific data descriptor
|
|
* @direction: DMA data transfer direction (TO or FROM the device)
|
|
* @flags: dmaengine defined flags
|
|
*
|
|
* Initializes RapidIO capable DMA channel for the specified data transfer.
|
|
* Uses DMA channel private extension to pass information related to remote
|
|
* target RIO device.
|
|
*
|
|
* Returns: pointer to DMA transaction descriptor if successful,
|
|
* error-valued pointer or NULL if failed.
|
|
*/
|
|
struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
|
|
struct dma_chan *dchan, struct rio_dma_data *data,
|
|
enum dma_transfer_direction direction, unsigned long flags)
|
|
{
|
|
return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg);
|
|
|
|
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
|
|
|
|
/**
|
|
* rio_find_mport - find RIO mport by its ID
|
|
* @mport_id: number (ID) of mport device
|
|
*
|
|
* Given a RIO mport number, the desired mport is located
|
|
* in the global list of mports. If the mport is found, a pointer to its
|
|
* data structure is returned. If no mport is found, %NULL is returned.
|
|
*/
|
|
struct rio_mport *rio_find_mport(int mport_id)
|
|
{
|
|
struct rio_mport *port;
|
|
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
if (port->id == mport_id)
|
|
goto found;
|
|
}
|
|
port = NULL;
|
|
found:
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
return port;
|
|
}
|
|
|
|
/**
|
|
* rio_register_scan - enumeration/discovery method registration interface
|
|
* @mport_id: mport device ID for which fabric scan routine has to be set
|
|
* (RIO_MPORT_ANY = set for all available mports)
|
|
* @scan_ops: enumeration/discovery operations structure
|
|
*
|
|
* Registers enumeration/discovery operations with RapidIO subsystem and
|
|
* attaches it to the specified mport device (or all available mports
|
|
* if RIO_MPORT_ANY is specified).
|
|
*
|
|
* Returns error if the mport already has an enumerator attached to it.
|
|
* In case of RIO_MPORT_ANY skips mports with valid scan routines (no error).
|
|
*/
|
|
int rio_register_scan(int mport_id, struct rio_scan *scan_ops)
|
|
{
|
|
struct rio_mport *port;
|
|
struct rio_scan_node *scan;
|
|
int rc = 0;
|
|
|
|
pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id);
|
|
|
|
if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) ||
|
|
!scan_ops)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&rio_mport_list_lock);
|
|
|
|
/*
|
|
* Check if there is another enumerator already registered for
|
|
* the same mport ID (including RIO_MPORT_ANY). Multiple enumerators
|
|
* for the same mport ID are not supported.
|
|
*/
|
|
list_for_each_entry(scan, &rio_scans, node) {
|
|
if (scan->mport_id == mport_id) {
|
|
rc = -EBUSY;
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize new scan registration node.
|
|
*/
|
|
scan = kzalloc(sizeof(*scan), GFP_KERNEL);
|
|
if (!scan) {
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
scan->mport_id = mport_id;
|
|
scan->ops = scan_ops;
|
|
|
|
/*
|
|
* Traverse the list of registered mports to attach this new scan.
|
|
*
|
|
* The new scan with matching mport ID overrides any previously attached
|
|
* scan assuming that old scan (if any) is the default one (based on the
|
|
* enumerator registration check above).
|
|
* If the new scan is the global one, it will be attached only to mports
|
|
* that do not have their own individual operations already attached.
|
|
*/
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
if (port->id == mport_id) {
|
|
port->nscan = scan_ops;
|
|
break;
|
|
} else if (mport_id == RIO_MPORT_ANY && !port->nscan)
|
|
port->nscan = scan_ops;
|
|
}
|
|
|
|
list_add_tail(&scan->node, &rio_scans);
|
|
|
|
err_out:
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_register_scan);
|
|
|
|
/**
|
|
* rio_unregister_scan - removes enumeration/discovery method from mport
|
|
* @mport_id: mport device ID for which fabric scan routine has to be
|
|
* unregistered (RIO_MPORT_ANY = apply to all mports that use
|
|
* the specified scan_ops)
|
|
* @scan_ops: enumeration/discovery operations structure
|
|
*
|
|
* Removes enumeration or discovery method assigned to the specified mport
|
|
* device. If RIO_MPORT_ANY is specified, removes the specified operations from
|
|
* all mports that have them attached.
|
|
*/
|
|
int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops)
|
|
{
|
|
struct rio_mport *port;
|
|
struct rio_scan_node *scan;
|
|
|
|
pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id);
|
|
|
|
if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&rio_mport_list_lock);
|
|
|
|
list_for_each_entry(port, &rio_mports, node)
|
|
if (port->id == mport_id ||
|
|
(mport_id == RIO_MPORT_ANY && port->nscan == scan_ops))
|
|
port->nscan = NULL;
|
|
|
|
list_for_each_entry(scan, &rio_scans, node) {
|
|
if (scan->mport_id == mport_id) {
|
|
list_del(&scan->node);
|
|
kfree(scan);
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_unregister_scan);
|
|
|
|
/**
|
|
* rio_mport_scan - execute enumeration/discovery on the specified mport
|
|
* @mport_id: number (ID) of mport device
|
|
*/
|
|
int rio_mport_scan(int mport_id)
|
|
{
|
|
struct rio_mport *port = NULL;
|
|
int rc;
|
|
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
if (port->id == mport_id)
|
|
goto found;
|
|
}
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
return -ENODEV;
|
|
found:
|
|
if (!port->nscan) {
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!try_module_get(port->nscan->owner)) {
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
if (port->host_deviceid >= 0)
|
|
rc = port->nscan->enumerate(port, 0);
|
|
else
|
|
rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT);
|
|
|
|
module_put(port->nscan->owner);
|
|
return rc;
|
|
}
|
|
|
|
static struct workqueue_struct *rio_wq;
|
|
|
|
struct rio_disc_work {
|
|
struct work_struct work;
|
|
struct rio_mport *mport;
|
|
};
|
|
|
|
static void disc_work_handler(struct work_struct *_work)
|
|
{
|
|
struct rio_disc_work *work;
|
|
|
|
work = container_of(_work, struct rio_disc_work, work);
|
|
pr_debug("RIO: discovery work for mport %d %s\n",
|
|
work->mport->id, work->mport->name);
|
|
if (try_module_get(work->mport->nscan->owner)) {
|
|
work->mport->nscan->discover(work->mport, 0);
|
|
module_put(work->mport->nscan->owner);
|
|
}
|
|
}
|
|
|
|
int rio_init_mports(void)
|
|
{
|
|
struct rio_mport *port;
|
|
struct rio_disc_work *work;
|
|
int n = 0;
|
|
|
|
if (!next_portid)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* First, run enumerations and check if we need to perform discovery
|
|
* on any of the registered mports.
|
|
*/
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
if (port->host_deviceid >= 0) {
|
|
if (port->nscan && try_module_get(port->nscan->owner)) {
|
|
port->nscan->enumerate(port, 0);
|
|
module_put(port->nscan->owner);
|
|
}
|
|
} else
|
|
n++;
|
|
}
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
if (!n)
|
|
goto no_disc;
|
|
|
|
/*
|
|
* If we have mports that require discovery schedule a discovery work
|
|
* for each of them. If the code below fails to allocate needed
|
|
* resources, exit without error to keep results of enumeration
|
|
* process (if any).
|
|
* TODO: Implement restart of discovery process for all or
|
|
* individual discovering mports.
|
|
*/
|
|
rio_wq = alloc_workqueue("riodisc", 0, 0);
|
|
if (!rio_wq) {
|
|
pr_err("RIO: unable allocate rio_wq\n");
|
|
goto no_disc;
|
|
}
|
|
|
|
work = kcalloc(n, sizeof *work, GFP_KERNEL);
|
|
if (!work) {
|
|
destroy_workqueue(rio_wq);
|
|
goto no_disc;
|
|
}
|
|
|
|
n = 0;
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
if (port->host_deviceid < 0 && port->nscan) {
|
|
work[n].mport = port;
|
|
INIT_WORK(&work[n].work, disc_work_handler);
|
|
queue_work(rio_wq, &work[n].work);
|
|
n++;
|
|
}
|
|
}
|
|
|
|
flush_workqueue(rio_wq);
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
pr_debug("RIO: destroy discovery workqueue\n");
|
|
destroy_workqueue(rio_wq);
|
|
kfree(work);
|
|
|
|
no_disc:
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_init_mports);
|
|
|
|
static int rio_get_hdid(int index)
|
|
{
|
|
if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS)
|
|
return -1;
|
|
|
|
return hdid[index];
|
|
}
|
|
|
|
int rio_mport_initialize(struct rio_mport *mport)
|
|
{
|
|
if (next_portid >= RIO_MAX_MPORTS) {
|
|
pr_err("RIO: reached specified max number of mports\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
atomic_set(&mport->state, RIO_DEVICE_INITIALIZING);
|
|
mport->id = next_portid++;
|
|
mport->host_deviceid = rio_get_hdid(mport->id);
|
|
mport->nscan = NULL;
|
|
mutex_init(&mport->lock);
|
|
mport->pwe_refcnt = 0;
|
|
INIT_LIST_HEAD(&mport->pwrites);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_mport_initialize);
|
|
|
|
int rio_register_mport(struct rio_mport *port)
|
|
{
|
|
struct rio_scan_node *scan = NULL;
|
|
int res = 0;
|
|
|
|
mutex_lock(&rio_mport_list_lock);
|
|
|
|
/*
|
|
* Check if there are any registered enumeration/discovery operations
|
|
* that have to be attached to the added mport.
|
|
*/
|
|
list_for_each_entry(scan, &rio_scans, node) {
|
|
if (port->id == scan->mport_id ||
|
|
scan->mport_id == RIO_MPORT_ANY) {
|
|
port->nscan = scan->ops;
|
|
if (port->id == scan->mport_id)
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_add_tail(&port->node, &rio_mports);
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
|
|
dev_set_name(&port->dev, "rapidio%d", port->id);
|
|
port->dev.class = &rio_mport_class;
|
|
atomic_set(&port->state, RIO_DEVICE_RUNNING);
|
|
|
|
res = device_register(&port->dev);
|
|
if (res) {
|
|
dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",
|
|
port->id, res);
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_del(&port->node);
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
put_device(&port->dev);
|
|
} else {
|
|
dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_register_mport);
|
|
|
|
static int rio_mport_cleanup_callback(struct device *dev, void *data)
|
|
{
|
|
struct rio_dev *rdev = to_rio_dev(dev);
|
|
|
|
if (dev->bus == &rio_bus_type)
|
|
rio_del_device(rdev, RIO_DEVICE_SHUTDOWN);
|
|
return 0;
|
|
}
|
|
|
|
static int rio_net_remove_children(struct rio_net *net)
|
|
{
|
|
/*
|
|
* Unregister all RapidIO devices residing on this net (this will
|
|
* invoke notification of registered subsystem interfaces as well).
|
|
*/
|
|
device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback);
|
|
return 0;
|
|
}
|
|
|
|
int rio_unregister_mport(struct rio_mport *port)
|
|
{
|
|
pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id);
|
|
|
|
/* Transition mport to the SHUTDOWN state */
|
|
if (atomic_cmpxchg(&port->state,
|
|
RIO_DEVICE_RUNNING,
|
|
RIO_DEVICE_SHUTDOWN) != RIO_DEVICE_RUNNING) {
|
|
pr_err("RIO: %s unexpected state transition for mport %s\n",
|
|
__func__, port->name);
|
|
}
|
|
|
|
if (port->net && port->net->hport == port) {
|
|
rio_net_remove_children(port->net);
|
|
rio_free_net(port->net);
|
|
}
|
|
|
|
/*
|
|
* Unregister all RapidIO devices attached to this mport (this will
|
|
* invoke notification of registered subsystem interfaces as well).
|
|
*/
|
|
mutex_lock(&rio_mport_list_lock);
|
|
list_del(&port->node);
|
|
mutex_unlock(&rio_mport_list_lock);
|
|
device_unregister(&port->dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rio_unregister_mport);
|