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authorAlexandre Bounine <alexandre.bounine@idt.com>2013-07-04 02:08:50 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 03:08:04 +0400
commit2ec3ba69faf301fb599e3651515e808e8efa533e (patch)
tree953f10726fd0cd61fec02082233c6097287d7257 /include
parent36f0efbbe8e21c153dfc2f94c91f89ab06fd64c5 (diff)
downloadlinux-2ec3ba69faf301fb599e3651515e808e8efa533e.tar.xz
rapidio: convert switch drivers to modules
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>
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h7
-rw-r--r--include/linux/rio.h51
2 files changed, 24 insertions, 34 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 4f2737208c42..c74d88baea60 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -275,13 +275,6 @@
VMLINUX_SYMBOL(__end_builtin_fw) = .; \
} \
\
- /* RapidIO route ops */ \
- .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
- VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
- *(.rio_switch_ops) \
- VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
- } \
- \
TRACEDATA \
\
/* Kernel symbol table: Normal symbols */ \
diff --git a/include/linux/rio.h b/include/linux/rio.h
index 18e099342e6f..fcd492e7aff4 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -94,6 +94,23 @@ 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
+ * @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 {
+ struct list_head node;
+ 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
@@ -101,14 +118,12 @@ union rio_pw_msg;
* @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
- * @nextdev: Array of per-port pointers to the next attached device
+ *
+ * Defines the operations that are necessary to initialize/control
+ * a particular RIO switch device.
*/
-struct rio_switch {
- struct list_head node;
- u16 switchid;
- u8 *route_table;
- u32 port_ok;
+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 */