#include "rio.h"
+/*
+ * struct rio_pwrite - RIO portwrite event
+ * @node: Node in list of doorbell events
+ * @pwcback: Doorbell event callback
+ * @context: Handler specific context to pass on event
+ */
+struct rio_pwrite {
+ struct list_head node;
+
+ int (*pwcback)(struct rio_mport *mport, void *context,
+ union rio_pw_msg *msg, int step);
+ void *context;
+};
+
MODULE_DESCRIPTION("RapidIO Subsystem Core");
MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>");
}
/**
- * rio_request_inb_pwrite - request inbound port-write message service
+ * 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))
+{
+ int rc = 0;
+ struct rio_pwrite *pwrite;
+
+ pwrite = kzalloc(sizeof(struct rio_pwrite), GFP_KERNEL);
+ if (!pwrite) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ pwrite->pwcback = pwcback;
+ pwrite->context = context;
+ mutex_lock(&mport->lock);
+ list_add_tail(&pwrite->node, &mport->pwrites);
+ mutex_unlock(&mport->lock);
+out:
+ return rc;
+}
+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
*
/**
* 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
}
/**
- * rio_inb_pwrite_handler - process inbound port-write message
+ * 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(union rio_pw_msg *pw_msg)
+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;
-
- rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL);
- if (rdev == NULL) {
- /* Device removed or enumeration error */
- pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
- __func__, pw_msg->em.comptag);
- return -EIO;
- }
-
- pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
+ struct rio_pwrite *pwrite;
#ifdef DEBUG_PW
{
- u32 i;
- for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) {
+ 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]);
- i += 4;
- }
+ i * 4, pw_msg->raw[i], pw_msg->raw[i + 1],
+ pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
+ }
}
#endif
- /* Call an external service function (if such is registered
- * for this 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.
+ 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->pwcback != NULL) {
+ 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:
mport->nscan = NULL;
mutex_init(&mport->lock);
mport->pwe_refcnt = 0;
+ INIT_LIST_HEAD(&mport->pwrites);
return 0;
}
projects / karo-tx-linux.git / blobdiff