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rapidio: convert switch drivers to modules

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Rework RapidIO switch drivers to add an option to build them as loadable
kernel modules.

This patch removes RapidIO-specific vmlinux section and converts switch
drivers to be compatible with LDM driver registration method.  To simplify
registration of device-specific callback routines this patch introduces
rio_switch_ops data structure.  The sw_sysfs() callback is removed from
the list of device-specific operations because under the new structure its
functions can be handled by switch driver's probe() and remove() routines.

If a specific switch device driver is not loaded the RapidIO subsystem
core will use default standard-based operations to configure a switch.
Because the current implementation of RapidIO enumeration/discovery method
relies on availability of device-specific operations for error management,
switch device drivers must be loaded before the RapidIO
enumeration/discovery starts.

This patch also moves several common routines from enumeration/discovery
module into the RapidIO core code to make switch-specific operations
accessible to all components of RapidIO subsystem.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@Prodrive.nl>
Cc: Micha Nelissen <micha.nelissen@Prodrive.nl>
Cc: Stef van Os <stef.van.os@Prodrive.nl>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine
2013-07-03 15:08:50 -07:00
committed by Linus Torvalds
parent 36f0efbbe8
commit 2ec3ba69fa
12 changed files with 566 additions and 343 deletions
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53
include/linux/rio.h
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@@ -94,14 +94,8 @@ union rio_pw_msg;
* @switchid: Switch ID that is unique across a network
* @route_table: Copy of switch routing table
* @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
* @add_entry: Callback for switch-specific route add function
* @get_entry: Callback for switch-specific route get function
* @clr_table: Callback for switch-specific clear route table function
* @set_domain: Callback for switch-specific domain setting function
* @get_domain: Callback for switch-specific domain get function
* @em_init: Callback for switch-specific error management init function
* @em_handle: Callback for switch-specific error management handler function
* @sw_sysfs: Callback that initializes switch-specific sysfs attributes
* @ops: pointer to switch-specific operations
* @lock: lock to serialize operations updates
* @nextdev: Array of per-port pointers to the next attached device
*/
struct rio_switch {
@@ -109,6 +103,27 @@ struct rio_switch {
u16 switchid;
u8 *route_table;
u32 port_ok;
struct rio_switch_ops *ops;
spinlock_t lock;
struct rio_dev *nextdev[0];
};
/**
* struct rio_switch_ops - Per-switch operations
* @owner: The module owner of this structure
* @add_entry: Callback for switch-specific route add function
* @get_entry: Callback for switch-specific route get function
* @clr_table: Callback for switch-specific clear route table function
* @set_domain: Callback for switch-specific domain setting function
* @get_domain: Callback for switch-specific domain get function
* @em_init: Callback for switch-specific error management init function
* @em_handle: Callback for switch-specific error management handler function
*
* Defines the operations that are necessary to initialize/control
* a particular RIO switch device.
*/
struct rio_switch_ops {
struct module *owner;
int (*add_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 route_port);
int (*get_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
@@ -121,8 +136,6 @@ struct rio_switch {
u8 *sw_domain);
int (*em_init) (struct rio_dev *dev);
int (*em_handle) (struct rio_dev *dev, u8 swport);
int (*sw_sysfs) (struct rio_dev *dev, int create);
struct rio_dev *nextdev[0];
};
/**
@@ -130,6 +143,7 @@ struct rio_switch {
* @global_list: Node in list of all RIO devices
* @net_list: Node in list of RIO devices in a network
* @net: Network this device is a part of
* @do_enum: Enumeration flag
* @did: Device ID
* @vid: Vendor ID
* @device_rev: Device revision
@@ -158,6 +172,7 @@ struct rio_dev {
struct list_head global_list; /* node in list of all RIO devices */
struct list_head net_list; /* node in per net list */
struct rio_net *net; /* RIO net this device resides in */
bool do_enum;
u16 did;
u16 vid;
u32 device_rev;
@@ -297,10 +312,6 @@ struct rio_net {
struct rio_id_table destid_table; /* destID allocation table */
};
/* Definitions used by switch sysfs initialization callback */
#define RIO_SW_SYSFS_CREATE 1 /* Create switch attributes */
#define RIO_SW_SYSFS_REMOVE 0 /* Remove switch attributes */
/* Low-level architecture-dependent routines */
/**
@@ -400,20 +411,6 @@ struct rio_device_id {
u16 asm_did, asm_vid;
};
/**
* struct rio_switch_ops - Per-switch operations
* @vid: RIO vendor ID
* @did: RIO device ID
* @init_hook: Callback that performs switch device initialization
*
* Defines the operations that are necessary to initialize/control
* a particular RIO switch device.
*/
struct rio_switch_ops {
u16 vid, did;
int (*init_hook) (struct rio_dev *rdev, int do_enum);
};
union rio_pw_msg {
struct {
u32 comptag; /* Component Tag CSR */