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2246 lines
60 KiB
2246 lines
60 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
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* RapidIO interconnect services |
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* (RapidIO Interconnect Specification, http://www.rapidio.org) |
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* |
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* Copyright 2005 MontaVista Software, Inc. |
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* Matt Porter <[email protected]> |
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* |
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* Copyright 2009 - 2013 Integrated Device Technology, Inc. |
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* Alex Bounine <[email protected]> |
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*/ |
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|
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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|
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/rio.h> |
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#include <linux/rio_drv.h> |
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#include <linux/rio_ids.h> |
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#include <linux/rio_regs.h> |
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#include <linux/module.h> |
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#include <linux/spinlock.h> |
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#include <linux/slab.h> |
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#include <linux/interrupt.h> |
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|
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#include "rio.h" |
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|
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/* |
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* struct rio_pwrite - RIO portwrite event |
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* @node: Node in list of doorbell events |
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* @pwcback: Doorbell event callback |
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* @context: Handler specific context to pass on event |
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*/ |
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struct rio_pwrite { |
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struct list_head node; |
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|
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int (*pwcback)(struct rio_mport *mport, void *context, |
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union rio_pw_msg *msg, int step); |
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void *context; |
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}; |
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|
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MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
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MODULE_AUTHOR("Matt Porter <[email protected]>"); |
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MODULE_AUTHOR("Alexandre Bounine <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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|
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static int hdid[RIO_MAX_MPORTS]; |
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static int ids_num; |
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module_param_array(hdid, int, &ids_num, 0); |
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MODULE_PARM_DESC(hdid, |
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"Destination ID assignment to local RapidIO controllers"); |
|
|
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static LIST_HEAD(rio_devices); |
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static LIST_HEAD(rio_nets); |
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static DEFINE_SPINLOCK(rio_global_list_lock); |
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|
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static LIST_HEAD(rio_mports); |
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static LIST_HEAD(rio_scans); |
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static DEFINE_MUTEX(rio_mport_list_lock); |
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static unsigned char next_portid; |
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static DEFINE_SPINLOCK(rio_mmap_lock); |
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|
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/** |
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* rio_local_get_device_id - Get the base/extended device id for a port |
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* @port: RIO master port from which to get the deviceid |
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* |
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* Reads the base/extended device id from the local device |
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* implementing the master port. Returns the 8/16-bit device |
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* id. |
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*/ |
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u16 rio_local_get_device_id(struct rio_mport *port) |
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{ |
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u32 result; |
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|
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rio_local_read_config_32(port, RIO_DID_CSR, &result); |
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|
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return (RIO_GET_DID(port->sys_size, result)); |
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} |
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EXPORT_SYMBOL_GPL(rio_local_get_device_id); |
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|
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/** |
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* rio_query_mport - Query mport device attributes |
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* @port: mport device to query |
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* @mport_attr: mport attributes data structure |
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* |
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* Returns attributes of specified mport through the |
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* pointer to attributes data structure. |
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*/ |
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int rio_query_mport(struct rio_mport *port, |
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struct rio_mport_attr *mport_attr) |
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{ |
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if (!port->ops->query_mport) |
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return -ENODATA; |
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return port->ops->query_mport(port, mport_attr); |
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} |
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EXPORT_SYMBOL(rio_query_mport); |
|
|
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/** |
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* rio_alloc_net- Allocate and initialize a new RIO network data structure |
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* @mport: Master port associated with the RIO network |
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* |
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* Allocates a RIO network structure, initializes per-network |
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* list heads, and adds the associated master port to the |
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* network list of associated master ports. Returns a |
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* RIO network pointer on success or %NULL on failure. |
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*/ |
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struct rio_net *rio_alloc_net(struct rio_mport *mport) |
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{ |
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struct rio_net *net = kzalloc(sizeof(*net), GFP_KERNEL); |
|
|
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if (net) { |
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INIT_LIST_HEAD(&net->node); |
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INIT_LIST_HEAD(&net->devices); |
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INIT_LIST_HEAD(&net->switches); |
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INIT_LIST_HEAD(&net->mports); |
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mport->net = net; |
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} |
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return net; |
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} |
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EXPORT_SYMBOL_GPL(rio_alloc_net); |
|
|
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int rio_add_net(struct rio_net *net) |
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{ |
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int err; |
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|
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err = device_register(&net->dev); |
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if (err) |
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return err; |
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spin_lock(&rio_global_list_lock); |
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list_add_tail(&net->node, &rio_nets); |
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spin_unlock(&rio_global_list_lock); |
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|
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(rio_add_net); |
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|
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void rio_free_net(struct rio_net *net) |
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{ |
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spin_lock(&rio_global_list_lock); |
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if (!list_empty(&net->node)) |
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list_del(&net->node); |
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spin_unlock(&rio_global_list_lock); |
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if (net->release) |
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net->release(net); |
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device_unregister(&net->dev); |
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} |
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EXPORT_SYMBOL_GPL(rio_free_net); |
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|
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/** |
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* rio_local_set_device_id - Set the base/extended device id for a port |
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* @port: RIO master port |
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* @did: Device ID value to be written |
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* |
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* Writes the base/extended device id from a device. |
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*/ |
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void rio_local_set_device_id(struct rio_mport *port, u16 did) |
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{ |
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rio_local_write_config_32(port, RIO_DID_CSR, |
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RIO_SET_DID(port->sys_size, did)); |
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} |
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EXPORT_SYMBOL_GPL(rio_local_set_device_id); |
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|
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/** |
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* rio_add_device- Adds a RIO device to the device model |
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* @rdev: RIO device |
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* |
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* Adds the RIO device to the global device list and adds the RIO |
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* device to the RIO device list. Creates the generic sysfs nodes |
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* for an RIO device. |
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*/ |
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int rio_add_device(struct rio_dev *rdev) |
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{ |
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int err; |
|
|
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atomic_set(&rdev->state, RIO_DEVICE_RUNNING); |
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err = device_register(&rdev->dev); |
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if (err) |
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return err; |
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|
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spin_lock(&rio_global_list_lock); |
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list_add_tail(&rdev->global_list, &rio_devices); |
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if (rdev->net) { |
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list_add_tail(&rdev->net_list, &rdev->net->devices); |
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if (rdev->pef & RIO_PEF_SWITCH) |
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list_add_tail(&rdev->rswitch->node, |
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&rdev->net->switches); |
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} |
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spin_unlock(&rio_global_list_lock); |
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|
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(rio_add_device); |
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|
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/* |
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* rio_del_device - removes a RIO device from the device model |
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* @rdev: RIO device |
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* @state: device state to set during removal process |
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* |
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* Removes the RIO device to the kernel device list and subsystem's device list. |
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* Clears sysfs entries for the removed device. |
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*/ |
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void rio_del_device(struct rio_dev *rdev, enum rio_device_state state) |
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{ |
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pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev)); |
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atomic_set(&rdev->state, state); |
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spin_lock(&rio_global_list_lock); |
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list_del(&rdev->global_list); |
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if (rdev->net) { |
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list_del(&rdev->net_list); |
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if (rdev->pef & RIO_PEF_SWITCH) { |
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list_del(&rdev->rswitch->node); |
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kfree(rdev->rswitch->route_table); |
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} |
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} |
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spin_unlock(&rio_global_list_lock); |
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device_unregister(&rdev->dev); |
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} |
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EXPORT_SYMBOL_GPL(rio_del_device); |
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|
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/** |
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* rio_request_inb_mbox - request inbound mailbox service |
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* @mport: RIO master port from which to allocate the mailbox resource |
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* @dev_id: Device specific pointer to pass on event |
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* @mbox: Mailbox number to claim |
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* @entries: Number of entries in inbound mailbox queue |
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* @minb: Callback to execute when inbound message is received |
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* |
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* Requests ownership of an inbound mailbox resource and binds |
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* a callback function to the resource. Returns %0 on success. |
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*/ |
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int rio_request_inb_mbox(struct rio_mport *mport, |
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void *dev_id, |
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int mbox, |
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int entries, |
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void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
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int slot)) |
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{ |
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int rc = -ENOSYS; |
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struct resource *res; |
|
|
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if (!mport->ops->open_inb_mbox) |
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goto out; |
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|
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res = kzalloc(sizeof(*res), GFP_KERNEL); |
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if (res) { |
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rio_init_mbox_res(res, mbox, mbox); |
|
|
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/* Make sure this mailbox isn't in use */ |
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rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], |
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res); |
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if (rc < 0) { |
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kfree(res); |
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goto out; |
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} |
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|
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mport->inb_msg[mbox].res = res; |
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|
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/* Hook the inbound message callback */ |
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mport->inb_msg[mbox].mcback = minb; |
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|
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rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
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if (rc) { |
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mport->inb_msg[mbox].mcback = NULL; |
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mport->inb_msg[mbox].res = NULL; |
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release_resource(res); |
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kfree(res); |
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} |
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} else |
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rc = -ENOMEM; |
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|
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out: |
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return rc; |
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} |
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EXPORT_SYMBOL_GPL(rio_request_inb_mbox); |
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|
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/** |
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* rio_release_inb_mbox - release inbound mailbox message service |
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* @mport: RIO master port from which to release the mailbox resource |
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* @mbox: Mailbox number to release |
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* |
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* Releases ownership of an inbound mailbox resource. Returns 0 |
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* if the request has been satisfied. |
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*/ |
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int rio_release_inb_mbox(struct rio_mport *mport, int mbox) |
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{ |
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int rc; |
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|
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if (!mport->ops->close_inb_mbox || !mport->inb_msg[mbox].res) |
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return -EINVAL; |
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|
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mport->ops->close_inb_mbox(mport, mbox); |
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mport->inb_msg[mbox].mcback = NULL; |
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|
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rc = release_resource(mport->inb_msg[mbox].res); |
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if (rc) |
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return rc; |
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|
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kfree(mport->inb_msg[mbox].res); |
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mport->inb_msg[mbox].res = NULL; |
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|
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(rio_release_inb_mbox); |
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|
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/** |
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* rio_request_outb_mbox - request outbound mailbox service |
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* @mport: RIO master port from which to allocate the mailbox resource |
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* @dev_id: Device specific pointer to pass on event |
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* @mbox: Mailbox number to claim |
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* @entries: Number of entries in outbound mailbox queue |
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* @moutb: Callback to execute when outbound message is sent |
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* |
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* Requests ownership of an outbound mailbox resource and binds |
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* a callback function to the resource. Returns 0 on success. |
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*/ |
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int rio_request_outb_mbox(struct rio_mport *mport, |
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void *dev_id, |
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int mbox, |
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int entries, |
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void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
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{ |
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int rc = -ENOSYS; |
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struct resource *res; |
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|
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if (!mport->ops->open_outb_mbox) |
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goto out; |
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|
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res = kzalloc(sizeof(*res), GFP_KERNEL); |
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if (res) { |
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rio_init_mbox_res(res, mbox, mbox); |
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|
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/* Make sure this outbound mailbox isn't in use */ |
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rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], |
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res); |
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if (rc < 0) { |
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kfree(res); |
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goto out; |
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} |
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|
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mport->outb_msg[mbox].res = res; |
|
|
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/* Hook the inbound message callback */ |
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mport->outb_msg[mbox].mcback = moutb; |
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|
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rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
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if (rc) { |
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mport->outb_msg[mbox].mcback = NULL; |
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mport->outb_msg[mbox].res = NULL; |
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release_resource(res); |
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kfree(res); |
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} |
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} else |
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rc = -ENOMEM; |
|
|
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out: |
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return rc; |
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} |
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EXPORT_SYMBOL_GPL(rio_request_outb_mbox); |
|
|
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/** |
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* 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 |
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* |
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* Releases ownership of an inbound mailbox resource. Returns 0 |
|
* if the request has been satisfied. |
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*/ |
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int rio_release_outb_mbox(struct rio_mport *mport, int mbox) |
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{ |
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int rc; |
|
|
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if (!mport->ops->close_outb_mbox || !mport->outb_msg[mbox].res) |
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return -EINVAL; |
|
|
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mport->ops->close_outb_mbox(mport, mbox); |
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mport->outb_msg[mbox].mcback = NULL; |
|
|
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rc = release_resource(mport->outb_msg[mbox].res); |
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if (rc) |
|
return rc; |
|
|
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kfree(mport->outb_msg[mbox].res); |
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mport->outb_msg[mbox].res = NULL; |
|
|
|
return 0; |
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} |
|
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 |
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* @dinb: Callback to execute when doorbell is received |
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* |
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* Adds a doorbell resource/callback pair into a port's |
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* doorbell event list. Returns 0 if the request has been |
|
* satisfied. |
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*/ |
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static int |
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rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
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void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, |
|
u16 info)) |
|
{ |
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struct rio_dbell *dbell = kmalloc(sizeof(*dbell), GFP_KERNEL); |
|
|
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if (!dbell) |
|
return -ENOMEM; |
|
|
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dbell->res = res; |
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dbell->dinb = dinb; |
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dbell->dev_id = dev_id; |
|
|
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mutex_lock(&mport->lock); |
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list_add_tail(&dbell->node, &mport->dbells); |
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mutex_unlock(&mport->lock); |
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return 0; |
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} |
|
|
|
/** |
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* 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. |
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*/ |
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int rio_request_inb_dbell(struct rio_mport *mport, |
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void *dev_id, |
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u16 start, |
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u16 end, |
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void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
|
u16 dst, u16 info)) |
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{ |
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int rc; |
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struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL); |
|
|
|
if (res) { |
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rio_init_dbell_res(res, start, end); |
|
|
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/* Make sure these doorbells aren't in use */ |
|
rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], |
|
res); |
|
if (rc < 0) { |
|
kfree(res); |
|
goto out; |
|
} |
|
|
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/* Hook the doorbell callback */ |
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rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
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} else |
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rc = -ENOMEM; |
|
|
|
out: |
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return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(rio_request_inb_dbell); |
|
|
|
/** |
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* 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; |
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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); |
|
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);
|
|
|