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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-22 14:26:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commitb77a2030dface6ea6b0d900bd8496ef41a9f3323 (patch)
treec31dccba4f2f4754f8443087550a3e7be52950f9 /include
parente6b585ca6e81badeb3d42db3cc408174f2826034 (diff)
rapidio: add core mport removal support
Add common mport removal support functions into the RapidIO subsystem core. Changes to the existing mport registration process have been made to avoid race conditions with active subsystem interfaces immediately after mport device registration: part of initialization code from rio_register_mport() have been moved into separate function rio_mport_initialize() to allow to perform mport registration as the final step of setup process. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> 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/linux/rio.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/rio.h b/include/linux/rio.h
index 36086bf7e6f9..f833773cdc68 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -137,6 +137,13 @@ struct rio_switch_ops {
int (*em_handle) (struct rio_dev *dev, u8 swport);
};
+enum rio_device_state {
+ RIO_DEVICE_INITIALIZING,
+ RIO_DEVICE_RUNNING,
+ RIO_DEVICE_GONE,
+ RIO_DEVICE_SHUTDOWN,
+};
+
/**
* struct rio_dev - RIO device info
* @global_list: Node in list of all RIO devices
@@ -165,6 +172,7 @@ struct rio_switch_ops {
* @destid: Network destination ID (or associated destid for switch)
* @hopcount: Hopcount to this device
* @prev: Previous RIO device connected to the current one
+ * @state: device state
* @rswitch: struct rio_switch (if valid for this device)
*/
struct rio_dev {
@@ -194,6 +202,7 @@ struct rio_dev {
u16 destid;
u8 hopcount;
struct rio_dev *prev;
+ atomic_t state;
struct rio_switch rswitch[0]; /* RIO switch info */
};
@@ -255,6 +264,7 @@ enum rio_phy_type {
* @priv: Master port private data
* @dma: DMA device associated with mport
* @nscan: RapidIO network enumeration/discovery operations
+ * @state: mport device state
*/
struct rio_mport {
struct list_head dbells; /* list of doorbell events */
@@ -283,8 +293,14 @@ struct rio_mport {
struct dma_device dma;
#endif
struct rio_scan *nscan;
+ atomic_t state;
};
+static inline int rio_mport_is_running(struct rio_mport *mport)
+{
+ return atomic_read(&mport->state) == RIO_DEVICE_RUNNING;
+}
+
/*
* Enumeration/discovery control flags
*/
@@ -525,7 +541,9 @@ struct rio_scan_node {
};
/* Architecture and hardware-specific functions */
+extern int rio_mport_initialize(struct rio_mport *);
extern int rio_register_mport(struct rio_mport *);
+extern int rio_unregister_mport(struct rio_mport *);
extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
extern void rio_close_inb_mbox(struct rio_mport *, int);
extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);