#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
+#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/b1lli.h>
#endif
#include <linux/mutex.h>
-
-static char *revision = "$Revision: 1.1.2.8 $";
-
-/* ------------------------------------------------------------- */
+#include <linux/rcupdate.h>
static int showcapimsgs = 0;
/* ------------------------------------------------------------- */
-struct capi_notifier {
+struct capictr_event {
struct work_struct work;
- unsigned int cmd;
+ unsigned int type;
u32 controller;
- u16 applid;
- u32 ncci;
};
/* ------------------------------------------------------------- */
#define NCCI2CTRL(ncci) (((ncci) >> 24) & 0x7f)
LIST_HEAD(capi_drivers);
-DEFINE_RWLOCK(capi_drivers_list_lock);
+DEFINE_MUTEX(capi_drivers_lock);
-static DEFINE_RWLOCK(application_lock);
-static DEFINE_MUTEX(controller_mutex);
+struct capi_ctr *capi_controller[CAPI_MAXCONTR];
+DEFINE_MUTEX(capi_controller_lock);
struct capi20_appl *capi_applications[CAPI_MAXAPPL];
-struct capi_ctr *capi_cards[CAPI_MAXCONTR];
-static int ncards;
+static int ncontrollers;
+
+static BLOCKING_NOTIFIER_HEAD(ctr_notifier_list);
/* -------- controller ref counting -------------------------------------- */
static inline struct capi_ctr *
-capi_ctr_get(struct capi_ctr *card)
+capi_ctr_get(struct capi_ctr *ctr)
{
- if (!try_module_get(card->owner))
+ if (!try_module_get(ctr->owner))
return NULL;
- return card;
+ return ctr;
}
static inline void
-capi_ctr_put(struct capi_ctr *card)
+capi_ctr_put(struct capi_ctr *ctr)
{
- module_put(card->owner);
+ module_put(ctr->owner);
}
/* ------------------------------------------------------------- */
if (contr - 1 >= CAPI_MAXCONTR)
return NULL;
- return capi_cards[contr - 1];
+ return capi_controller[contr - 1];
}
static inline struct capi20_appl *get_capi_appl_by_nr(u16 applid)
if (applid - 1 >= CAPI_MAXAPPL)
return NULL;
- return capi_applications[applid - 1];
+ return rcu_dereference(capi_applications[applid - 1]);
}
/* -------- util functions ------------------------------------ */
/* ------------------------------------------------------------ */
-static void register_appl(struct capi_ctr *card, u16 applid, capi_register_params *rparam)
+static void
+register_appl(struct capi_ctr *ctr, u16 applid, capi_register_params *rparam)
{
- card = capi_ctr_get(card);
+ ctr = capi_ctr_get(ctr);
- if (card)
- card->register_appl(card, applid, rparam);
+ if (ctr)
+ ctr->register_appl(ctr, applid, rparam);
else
- printk(KERN_WARNING "%s: cannot get card resources\n", __func__);
+ printk(KERN_WARNING "%s: cannot get controller resources\n",
+ __func__);
}
-static void release_appl(struct capi_ctr *card, u16 applid)
+static void release_appl(struct capi_ctr *ctr, u16 applid)
{
DBG("applid %#x", applid);
- card->release_appl(card, applid);
- capi_ctr_put(card);
+ ctr->release_appl(ctr, applid);
+ capi_ctr_put(ctr);
}
-/* -------- KCI_CONTRUP --------------------------------------- */
-
static void notify_up(u32 contr)
{
- struct capi_ctr *card = get_capi_ctr_by_nr(contr);
struct capi20_appl *ap;
+ struct capi_ctr *ctr;
u16 applid;
- if (showcapimsgs & 1) {
+ mutex_lock(&capi_controller_lock);
+
+ if (showcapimsgs & 1)
printk(KERN_DEBUG "kcapi: notify up contr %d\n", contr);
- }
- if (!card) {
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr) {
+ if (ctr->state == CAPI_CTR_RUNNING)
+ goto unlock_out;
+
+ ctr->state = CAPI_CTR_RUNNING;
+
+ for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
+ ap = get_capi_appl_by_nr(applid);
+ if (!ap)
+ continue;
+ register_appl(ctr, applid, &ap->rparam);
+ }
+
+ wake_up_interruptible_all(&ctr->state_wait_queue);
+ } else
printk(KERN_WARNING "%s: invalid contr %d\n", __func__, contr);
- return;
- }
- for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
- ap = get_capi_appl_by_nr(applid);
- if (!ap || ap->release_in_progress) continue;
- register_appl(card, applid, &ap->rparam);
- if (ap->callback && !ap->release_in_progress)
- ap->callback(KCI_CONTRUP, contr, &card->profile);
- }
-}
-/* -------- KCI_CONTRDOWN ------------------------------------- */
+unlock_out:
+ mutex_unlock(&capi_controller_lock);
+}
-static void notify_down(u32 contr)
+static void ctr_down(struct capi_ctr *ctr, int new_state)
{
struct capi20_appl *ap;
u16 applid;
- if (showcapimsgs & 1) {
- printk(KERN_DEBUG "kcapi: notify down contr %d\n", contr);
- }
+ if (ctr->state == CAPI_CTR_DETECTED || ctr->state == CAPI_CTR_DETACHED)
+ return;
+
+ ctr->state = new_state;
+
+ memset(ctr->manu, 0, sizeof(ctr->manu));
+ memset(&ctr->version, 0, sizeof(ctr->version));
+ memset(&ctr->profile, 0, sizeof(ctr->profile));
+ memset(ctr->serial, 0, sizeof(ctr->serial));
for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
ap = get_capi_appl_by_nr(applid);
- if (ap && ap->callback && !ap->release_in_progress)
- ap->callback(KCI_CONTRDOWN, contr, NULL);
+ if (ap)
+ capi_ctr_put(ctr);
}
+
+ wake_up_interruptible_all(&ctr->state_wait_queue);
}
-static void notify_handler(struct work_struct *work)
+static void notify_down(u32 contr)
{
- struct capi_notifier *np =
- container_of(work, struct capi_notifier, work);
+ struct capi_ctr *ctr;
- switch (np->cmd) {
- case KCI_CONTRUP:
- notify_up(np->controller);
+ mutex_lock(&capi_controller_lock);
+
+ if (showcapimsgs & 1)
+ printk(KERN_DEBUG "kcapi: notify down contr %d\n", contr);
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr)
+ ctr_down(ctr, CAPI_CTR_DETECTED);
+ else
+ printk(KERN_WARNING "%s: invalid contr %d\n", __func__, contr);
+
+ mutex_unlock(&capi_controller_lock);
+}
+
+static int
+notify_handler(struct notifier_block *nb, unsigned long val, void *v)
+{
+ u32 contr = (long)v;
+
+ switch (val) {
+ case CAPICTR_UP:
+ notify_up(contr);
break;
- case KCI_CONTRDOWN:
- notify_down(np->controller);
+ case CAPICTR_DOWN:
+ notify_down(contr);
break;
}
+ return NOTIFY_OK;
+}
+
+static void do_notify_work(struct work_struct *work)
+{
+ struct capictr_event *event =
+ container_of(work, struct capictr_event, work);
- kfree(np);
+ blocking_notifier_call_chain(&ctr_notifier_list, event->type,
+ (void *)(long)event->controller);
+ kfree(event);
}
/*
* The notifier will result in adding/deleteing of devices. Devices can
* only removed in user process, not in bh.
*/
-static int notify_push(unsigned int cmd, u32 controller, u16 applid, u32 ncci)
+static int notify_push(unsigned int event_type, u32 controller)
{
- struct capi_notifier *np = kmalloc(sizeof(*np), GFP_ATOMIC);
+ struct capictr_event *event = kmalloc(sizeof(*event), GFP_ATOMIC);
- if (!np)
+ if (!event)
return -ENOMEM;
- INIT_WORK(&np->work, notify_handler);
- np->cmd = cmd;
- np->controller = controller;
- np->applid = applid;
- np->ncci = ncci;
+ INIT_WORK(&event->work, do_notify_work);
+ event->type = event_type;
+ event->controller = controller;
- schedule_work(&np->work);
+ schedule_work(&event->work);
return 0;
}
-
+int register_capictr_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&ctr_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(register_capictr_notifier);
+
+int unregister_capictr_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&ctr_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_capictr_notifier);
+
/* -------- Receiver ------------------------------------------ */
static void recv_handler(struct work_struct *work)
mutex_unlock(&ap->recv_mtx);
}
-void capi_ctr_handle_message(struct capi_ctr * card, u16 appl, struct sk_buff *skb)
+/**
+ * capi_ctr_handle_message() - handle incoming CAPI message
+ * @ctr: controller descriptor structure.
+ * @appl: application ID.
+ * @skb: message.
+ *
+ * Called by hardware driver to pass a CAPI message to the application.
+ */
+
+void capi_ctr_handle_message(struct capi_ctr *ctr, u16 appl,
+ struct sk_buff *skb)
{
struct capi20_appl *ap;
int showctl = 0;
u8 cmd, subcmd;
- unsigned long flags;
_cdebbuf *cdb;
- if (card->cardstate != CARD_RUNNING) {
+ if (ctr->state != CAPI_CTR_RUNNING) {
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_INFO "kcapi: controller [%03d] not active, got: %s",
- card->cnr, cdb->buf);
+ ctr->cnr, cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_INFO "kcapi: controller [%03d] not active, cannot trace\n",
- card->cnr);
+ ctr->cnr);
goto error;
}
cmd = CAPIMSG_COMMAND(skb->data);
subcmd = CAPIMSG_SUBCOMMAND(skb->data);
if (cmd == CAPI_DATA_B3 && subcmd == CAPI_IND) {
- card->nrecvdatapkt++;
- if (card->traceflag > 2) showctl |= 2;
+ ctr->nrecvdatapkt++;
+ if (ctr->traceflag > 2)
+ showctl |= 2;
} else {
- card->nrecvctlpkt++;
- if (card->traceflag) showctl |= 2;
+ ctr->nrecvctlpkt++;
+ if (ctr->traceflag)
+ showctl |= 2;
}
- showctl |= (card->traceflag & 1);
+ showctl |= (ctr->traceflag & 1);
if (showctl & 2) {
if (showctl & 1) {
printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u\n",
- card->cnr, CAPIMSG_APPID(skb->data),
+ ctr->cnr, CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
} else {
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_DEBUG "kcapi: got [%03d] %s\n",
- card->cnr, cdb->buf);
+ ctr->cnr, cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u, cannot trace\n",
- card->cnr, CAPIMSG_APPID(skb->data),
+ ctr->cnr, CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
}
}
- read_lock_irqsave(&application_lock, flags);
+ rcu_read_lock();
ap = get_capi_appl_by_nr(CAPIMSG_APPID(skb->data));
- if ((!ap) || (ap->release_in_progress)) {
- read_unlock_irqrestore(&application_lock, flags);
+ if (!ap) {
+ rcu_read_unlock();
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_ERR "kcapi: handle_message: applid %d state released (%s)\n",
}
skb_queue_tail(&ap->recv_queue, skb);
schedule_work(&ap->recv_work);
- read_unlock_irqrestore(&application_lock, flags);
+ rcu_read_unlock();
return;
EXPORT_SYMBOL(capi_ctr_handle_message);
-void capi_ctr_ready(struct capi_ctr * card)
-{
- card->cardstate = CARD_RUNNING;
+/**
+ * capi_ctr_ready() - signal CAPI controller ready
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to signal that the controller is up and running.
+ */
- printk(KERN_NOTICE "kcapi: card [%03d] \"%s\" ready.\n",
- card->cnr, card->name);
+void capi_ctr_ready(struct capi_ctr *ctr)
+{
+ printk(KERN_NOTICE "kcapi: controller [%03d] \"%s\" ready.\n",
+ ctr->cnr, ctr->name);
- notify_push(KCI_CONTRUP, card->cnr, 0, 0);
+ notify_push(CAPICTR_UP, ctr->cnr);
}
EXPORT_SYMBOL(capi_ctr_ready);
-void capi_ctr_reseted(struct capi_ctr * card)
-{
- u16 appl;
-
- DBG("");
-
- if (card->cardstate == CARD_DETECTED)
- return;
-
- card->cardstate = CARD_DETECTED;
-
- memset(card->manu, 0, sizeof(card->manu));
- memset(&card->version, 0, sizeof(card->version));
- memset(&card->profile, 0, sizeof(card->profile));
- memset(card->serial, 0, sizeof(card->serial));
-
- for (appl = 1; appl <= CAPI_MAXAPPL; appl++) {
- struct capi20_appl *ap = get_capi_appl_by_nr(appl);
- if (!ap || ap->release_in_progress)
- continue;
-
- capi_ctr_put(card);
- }
+/**
+ * capi_ctr_down() - signal CAPI controller not ready
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to signal that the controller is down and
+ * unavailable for use.
+ */
- printk(KERN_NOTICE "kcapi: card [%03d] down.\n", card->cnr);
+void capi_ctr_down(struct capi_ctr *ctr)
+{
+ printk(KERN_NOTICE "kcapi: controller [%03d] down.\n", ctr->cnr);
- notify_push(KCI_CONTRDOWN, card->cnr, 0, 0);
+ notify_push(CAPICTR_DOWN, ctr->cnr);
}
-EXPORT_SYMBOL(capi_ctr_reseted);
+EXPORT_SYMBOL(capi_ctr_down);
+
+/**
+ * capi_ctr_suspend_output() - suspend controller
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to stop data flow.
+ *
+ * Note: The caller is responsible for synchronizing concurrent state changes
+ * as well as invocations of capi_ctr_handle_message.
+ */
-void capi_ctr_suspend_output(struct capi_ctr *card)
+void capi_ctr_suspend_output(struct capi_ctr *ctr)
{
- if (!card->blocked) {
- printk(KERN_DEBUG "kcapi: card [%03d] suspend\n", card->cnr);
- card->blocked = 1;
+ if (!ctr->blocked) {
+ printk(KERN_DEBUG "kcapi: controller [%03d] suspend\n",
+ ctr->cnr);
+ ctr->blocked = 1;
}
}
EXPORT_SYMBOL(capi_ctr_suspend_output);
-void capi_ctr_resume_output(struct capi_ctr *card)
+/**
+ * capi_ctr_resume_output() - resume controller
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to resume data flow.
+ *
+ * Note: The caller is responsible for synchronizing concurrent state changes
+ * as well as invocations of capi_ctr_handle_message.
+ */
+
+void capi_ctr_resume_output(struct capi_ctr *ctr)
{
- if (card->blocked) {
- printk(KERN_DEBUG "kcapi: card [%03d] resume\n", card->cnr);
- card->blocked = 0;
+ if (ctr->blocked) {
+ printk(KERN_DEBUG "kcapi: controller [%03d] resumed\n",
+ ctr->cnr);
+ ctr->blocked = 0;
}
}
/* ------------------------------------------------------------- */
-int
-attach_capi_ctr(struct capi_ctr *card)
+/**
+ * attach_capi_ctr() - register CAPI controller
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to register a controller with the CAPI subsystem.
+ * Return value: 0 on success, error code < 0 on error
+ */
+
+int attach_capi_ctr(struct capi_ctr *ctr)
{
int i;
- mutex_lock(&controller_mutex);
+ mutex_lock(&capi_controller_lock);
for (i = 0; i < CAPI_MAXCONTR; i++) {
- if (capi_cards[i] == NULL)
+ if (!capi_controller[i])
break;
}
if (i == CAPI_MAXCONTR) {
- mutex_unlock(&controller_mutex);
+ mutex_unlock(&capi_controller_lock);
printk(KERN_ERR "kcapi: out of controller slots\n");
return -EBUSY;
}
- capi_cards[i] = card;
-
- mutex_unlock(&controller_mutex);
-
- card->nrecvctlpkt = 0;
- card->nrecvdatapkt = 0;
- card->nsentctlpkt = 0;
- card->nsentdatapkt = 0;
- card->cnr = i + 1;
- card->cardstate = CARD_DETECTED;
- card->blocked = 0;
- card->traceflag = showcapimsgs;
-
- sprintf(card->procfn, "capi/controllers/%d", card->cnr);
- card->procent = create_proc_entry(card->procfn, 0, NULL);
- if (card->procent) {
- card->procent->read_proc =
- (int (*)(char *,char **,off_t,int,int *,void *))
- card->ctr_read_proc;
- card->procent->data = card;
- }
+ capi_controller[i] = ctr;
- ncards++;
- printk(KERN_NOTICE "kcapi: Controller [%03d]: %s attached\n",
- card->cnr, card->name);
+ ctr->nrecvctlpkt = 0;
+ ctr->nrecvdatapkt = 0;
+ ctr->nsentctlpkt = 0;
+ ctr->nsentdatapkt = 0;
+ ctr->cnr = i + 1;
+ ctr->state = CAPI_CTR_DETECTED;
+ ctr->blocked = 0;
+ ctr->traceflag = showcapimsgs;
+ init_waitqueue_head(&ctr->state_wait_queue);
+
+ sprintf(ctr->procfn, "capi/controllers/%d", ctr->cnr);
+ ctr->procent = proc_create_data(ctr->procfn, 0, NULL, ctr->proc_fops, ctr);
+
+ ncontrollers++;
+
+ mutex_unlock(&capi_controller_lock);
+
+ printk(KERN_NOTICE "kcapi: controller [%03d]: %s attached\n",
+ ctr->cnr, ctr->name);
return 0;
}
EXPORT_SYMBOL(attach_capi_ctr);
-int detach_capi_ctr(struct capi_ctr *card)
+/**
+ * detach_capi_ctr() - unregister CAPI controller
+ * @ctr: controller descriptor structure.
+ *
+ * Called by hardware driver to remove the registration of a controller
+ * with the CAPI subsystem.
+ * Return value: 0 on success, error code < 0 on error
+ */
+
+int detach_capi_ctr(struct capi_ctr *ctr)
{
- if (card->cardstate != CARD_DETECTED)
- capi_ctr_reseted(card);
+ int err = 0;
- ncards--;
+ mutex_lock(&capi_controller_lock);
- if (card->procent) {
- remove_proc_entry(card->procfn, NULL);
- card->procent = NULL;
+ ctr_down(ctr, CAPI_CTR_DETACHED);
+
+ if (capi_controller[ctr->cnr - 1] != ctr) {
+ err = -EINVAL;
+ goto unlock_out;
}
- capi_cards[card->cnr - 1] = NULL;
- printk(KERN_NOTICE "kcapi: Controller [%03d]: %s unregistered\n",
- card->cnr, card->name);
+ capi_controller[ctr->cnr - 1] = NULL;
+ ncontrollers--;
- return 0;
+ if (ctr->procent)
+ remove_proc_entry(ctr->procfn, NULL);
+
+ printk(KERN_NOTICE "kcapi: controller [%03d]: %s unregistered\n",
+ ctr->cnr, ctr->name);
+
+unlock_out:
+ mutex_unlock(&capi_controller_lock);
+
+ return err;
}
EXPORT_SYMBOL(detach_capi_ctr);
+/**
+ * register_capi_driver() - register CAPI driver
+ * @driver: driver descriptor structure.
+ *
+ * Called by hardware driver to register itself with the CAPI subsystem.
+ */
+
void register_capi_driver(struct capi_driver *driver)
{
- unsigned long flags;
-
- write_lock_irqsave(&capi_drivers_list_lock, flags);
+ mutex_lock(&capi_drivers_lock);
list_add_tail(&driver->list, &capi_drivers);
- write_unlock_irqrestore(&capi_drivers_list_lock, flags);
+ mutex_unlock(&capi_drivers_lock);
}
EXPORT_SYMBOL(register_capi_driver);
+/**
+ * unregister_capi_driver() - unregister CAPI driver
+ * @driver: driver descriptor structure.
+ *
+ * Called by hardware driver to unregister itself from the CAPI subsystem.
+ */
+
void unregister_capi_driver(struct capi_driver *driver)
{
- unsigned long flags;
-
- write_lock_irqsave(&capi_drivers_list_lock, flags);
+ mutex_lock(&capi_drivers_lock);
list_del(&driver->list);
- write_unlock_irqrestore(&capi_drivers_list_lock, flags);
+ mutex_unlock(&capi_drivers_lock);
}
EXPORT_SYMBOL(unregister_capi_driver);
/* -------- CAPI2.0 Interface ---------------------------------- */
/* ------------------------------------------------------------- */
+/**
+ * capi20_isinstalled() - CAPI 2.0 operation CAPI_INSTALLED
+ *
+ * Return value: CAPI result code (CAPI_NOERROR if at least one ISDN controller
+ * is ready for use, CAPI_REGNOTINSTALLED otherwise)
+ */
+
u16 capi20_isinstalled(void)
{
+ u16 ret = CAPI_REGNOTINSTALLED;
int i;
- for (i = 0; i < CAPI_MAXCONTR; i++) {
- if (capi_cards[i] && capi_cards[i]->cardstate == CARD_RUNNING)
- return CAPI_NOERROR;
- }
- return CAPI_REGNOTINSTALLED;
+
+ mutex_lock(&capi_controller_lock);
+
+ for (i = 0; i < CAPI_MAXCONTR; i++)
+ if (capi_controller[i] &&
+ capi_controller[i]->state == CAPI_CTR_RUNNING) {
+ ret = CAPI_NOERROR;
+ break;
+ }
+
+ mutex_unlock(&capi_controller_lock);
+
+ return ret;
}
EXPORT_SYMBOL(capi20_isinstalled);
+/**
+ * capi20_register() - CAPI 2.0 operation CAPI_REGISTER
+ * @ap: CAPI application descriptor structure.
+ *
+ * Register an application's presence with CAPI.
+ * A unique application ID is assigned and stored in @ap->applid.
+ * After this function returns successfully, the message receive
+ * callback function @ap->recv_message() may be called at any time
+ * until capi20_release() has been called for the same @ap.
+ * Return value: CAPI result code
+ */
+
u16 capi20_register(struct capi20_appl *ap)
{
int i;
u16 applid;
- unsigned long flags;
DBG("");
if (ap->rparam.datablklen < 128)
return CAPI_LOGBLKSIZETOSMALL;
- write_lock_irqsave(&application_lock, flags);
+ ap->nrecvctlpkt = 0;
+ ap->nrecvdatapkt = 0;
+ ap->nsentctlpkt = 0;
+ ap->nsentdatapkt = 0;
+ mutex_init(&ap->recv_mtx);
+ skb_queue_head_init(&ap->recv_queue);
+ INIT_WORK(&ap->recv_work, recv_handler);
+ ap->release_in_progress = 0;
+
+ mutex_lock(&capi_controller_lock);
for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
if (capi_applications[applid - 1] == NULL)
break;
}
if (applid > CAPI_MAXAPPL) {
- write_unlock_irqrestore(&application_lock, flags);
+ mutex_unlock(&capi_controller_lock);
return CAPI_TOOMANYAPPLS;
}
ap->applid = applid;
capi_applications[applid - 1] = ap;
- ap->nrecvctlpkt = 0;
- ap->nrecvdatapkt = 0;
- ap->nsentctlpkt = 0;
- ap->nsentdatapkt = 0;
- ap->callback = NULL;
- mutex_init(&ap->recv_mtx);
- skb_queue_head_init(&ap->recv_queue);
- INIT_WORK(&ap->recv_work, recv_handler);
- ap->release_in_progress = 0;
-
- write_unlock_irqrestore(&application_lock, flags);
-
- mutex_lock(&controller_mutex);
for (i = 0; i < CAPI_MAXCONTR; i++) {
- if (!capi_cards[i] || capi_cards[i]->cardstate != CARD_RUNNING)
+ if (!capi_controller[i] ||
+ capi_controller[i]->state != CAPI_CTR_RUNNING)
continue;
- register_appl(capi_cards[i], applid, &ap->rparam);
+ register_appl(capi_controller[i], applid, &ap->rparam);
}
- mutex_unlock(&controller_mutex);
+
+ mutex_unlock(&capi_controller_lock);
if (showcapimsgs & 1) {
printk(KERN_DEBUG "kcapi: appl %d up\n", applid);
EXPORT_SYMBOL(capi20_register);
+/**
+ * capi20_release() - CAPI 2.0 operation CAPI_RELEASE
+ * @ap: CAPI application descriptor structure.
+ *
+ * Terminate an application's registration with CAPI.
+ * After this function returns successfully, the message receive
+ * callback function @ap->recv_message() will no longer be called.
+ * Return value: CAPI result code
+ */
+
u16 capi20_release(struct capi20_appl *ap)
{
int i;
- unsigned long flags;
DBG("applid %#x", ap->applid);
- write_lock_irqsave(&application_lock, flags);
+ mutex_lock(&capi_controller_lock);
+
ap->release_in_progress = 1;
capi_applications[ap->applid - 1] = NULL;
- write_unlock_irqrestore(&application_lock, flags);
- mutex_lock(&controller_mutex);
+ synchronize_rcu();
+
for (i = 0; i < CAPI_MAXCONTR; i++) {
- if (!capi_cards[i] || capi_cards[i]->cardstate != CARD_RUNNING)
+ if (!capi_controller[i] ||
+ capi_controller[i]->state != CAPI_CTR_RUNNING)
continue;
- release_appl(capi_cards[i], ap->applid);
+ release_appl(capi_controller[i], ap->applid);
}
- mutex_unlock(&controller_mutex);
+
+ mutex_unlock(&capi_controller_lock);
flush_scheduled_work();
skb_queue_purge(&ap->recv_queue);
EXPORT_SYMBOL(capi20_release);
+/**
+ * capi20_put_message() - CAPI 2.0 operation CAPI_PUT_MESSAGE
+ * @ap: CAPI application descriptor structure.
+ * @skb: CAPI message.
+ *
+ * Transfer a single message to CAPI.
+ * Return value: CAPI result code
+ */
+
u16 capi20_put_message(struct capi20_appl *ap, struct sk_buff *skb)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
int showctl = 0;
u8 cmd, subcmd;
DBG("applid %#x", ap->applid);
- if (ncards == 0)
+ if (ncontrollers == 0)
return CAPI_REGNOTINSTALLED;
if ((ap->applid == 0) || ap->release_in_progress)
return CAPI_ILLAPPNR;
|| !capi_cmd_valid(CAPIMSG_COMMAND(skb->data))
|| !capi_subcmd_valid(CAPIMSG_SUBCOMMAND(skb->data)))
return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
- card = get_capi_ctr_by_nr(CAPIMSG_CONTROLLER(skb->data));
- if (!card || card->cardstate != CARD_RUNNING) {
- card = get_capi_ctr_by_nr(1); // XXX why?
- if (!card || card->cardstate != CARD_RUNNING)
- return CAPI_REGNOTINSTALLED;
- }
- if (card->blocked)
+
+ /*
+ * The controller reference is protected by the existence of the
+ * application passed to us. We assume that the caller properly
+ * synchronizes this service with capi20_release.
+ */
+ ctr = get_capi_ctr_by_nr(CAPIMSG_CONTROLLER(skb->data));
+ if (!ctr || ctr->state != CAPI_CTR_RUNNING)
+ return CAPI_REGNOTINSTALLED;
+ if (ctr->blocked)
return CAPI_SENDQUEUEFULL;
cmd = CAPIMSG_COMMAND(skb->data);
subcmd = CAPIMSG_SUBCOMMAND(skb->data);
if (cmd == CAPI_DATA_B3 && subcmd== CAPI_REQ) {
- card->nsentdatapkt++;
+ ctr->nsentdatapkt++;
ap->nsentdatapkt++;
- if (card->traceflag > 2) showctl |= 2;
+ if (ctr->traceflag > 2)
+ showctl |= 2;
} else {
- card->nsentctlpkt++;
+ ctr->nsentctlpkt++;
ap->nsentctlpkt++;
- if (card->traceflag) showctl |= 2;
+ if (ctr->traceflag)
+ showctl |= 2;
}
- showctl |= (card->traceflag & 1);
+ showctl |= (ctr->traceflag & 1);
if (showctl & 2) {
if (showctl & 1) {
printk(KERN_DEBUG "kcapi: put [%03d] id#%d %s len=%u\n",
CAPIMSG_LEN(skb->data));
}
}
- return card->send_message(card, skb);
+ return ctr->send_message(ctr, skb);
}
EXPORT_SYMBOL(capi20_put_message);
+/**
+ * capi20_get_manufacturer() - CAPI 2.0 operation CAPI_GET_MANUFACTURER
+ * @contr: controller number.
+ * @buf: result buffer (64 bytes).
+ *
+ * Retrieve information about the manufacturer of the specified ISDN controller
+ * or (for @contr == 0) the driver itself.
+ * Return value: CAPI result code
+ */
+
u16 capi20_get_manufacturer(u32 contr, u8 *buf)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
+ u16 ret;
if (contr == 0) {
strlcpy(buf, capi_manufakturer, CAPI_MANUFACTURER_LEN);
return CAPI_NOERROR;
}
- card = get_capi_ctr_by_nr(contr);
- if (!card || card->cardstate != CARD_RUNNING)
- return CAPI_REGNOTINSTALLED;
- strlcpy(buf, card->manu, CAPI_MANUFACTURER_LEN);
- return CAPI_NOERROR;
+
+ mutex_lock(&capi_controller_lock);
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr && ctr->state == CAPI_CTR_RUNNING) {
+ strlcpy(buf, ctr->manu, CAPI_MANUFACTURER_LEN);
+ ret = CAPI_NOERROR;
+ } else
+ ret = CAPI_REGNOTINSTALLED;
+
+ mutex_unlock(&capi_controller_lock);
+ return ret;
}
EXPORT_SYMBOL(capi20_get_manufacturer);
+/**
+ * capi20_get_version() - CAPI 2.0 operation CAPI_GET_VERSION
+ * @contr: controller number.
+ * @verp: result structure.
+ *
+ * Retrieve version information for the specified ISDN controller
+ * or (for @contr == 0) the driver itself.
+ * Return value: CAPI result code
+ */
+
u16 capi20_get_version(u32 contr, struct capi_version *verp)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
+ u16 ret;
if (contr == 0) {
*verp = driver_version;
return CAPI_NOERROR;
}
- card = get_capi_ctr_by_nr(contr);
- if (!card || card->cardstate != CARD_RUNNING)
- return CAPI_REGNOTINSTALLED;
- memcpy((void *) verp, &card->version, sizeof(capi_version));
- return CAPI_NOERROR;
+ mutex_lock(&capi_controller_lock);
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr && ctr->state == CAPI_CTR_RUNNING) {
+ memcpy(verp, &ctr->version, sizeof(capi_version));
+ ret = CAPI_NOERROR;
+ } else
+ ret = CAPI_REGNOTINSTALLED;
+
+ mutex_unlock(&capi_controller_lock);
+ return ret;
}
EXPORT_SYMBOL(capi20_get_version);
+/**
+ * capi20_get_serial() - CAPI 2.0 operation CAPI_GET_SERIAL_NUMBER
+ * @contr: controller number.
+ * @serial: result buffer (8 bytes).
+ *
+ * Retrieve the serial number of the specified ISDN controller
+ * or (for @contr == 0) the driver itself.
+ * Return value: CAPI result code
+ */
+
u16 capi20_get_serial(u32 contr, u8 *serial)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
+ u16 ret;
if (contr == 0) {
strlcpy(serial, driver_serial, CAPI_SERIAL_LEN);
return CAPI_NOERROR;
}
- card = get_capi_ctr_by_nr(contr);
- if (!card || card->cardstate != CARD_RUNNING)
- return CAPI_REGNOTINSTALLED;
- strlcpy((void *) serial, card->serial, CAPI_SERIAL_LEN);
- return CAPI_NOERROR;
+ mutex_lock(&capi_controller_lock);
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr && ctr->state == CAPI_CTR_RUNNING) {
+ strlcpy(serial, ctr->serial, CAPI_SERIAL_LEN);
+ ret = CAPI_NOERROR;
+ } else
+ ret = CAPI_REGNOTINSTALLED;
+
+ mutex_unlock(&capi_controller_lock);
+ return ret;
}
EXPORT_SYMBOL(capi20_get_serial);
+/**
+ * capi20_get_profile() - CAPI 2.0 operation CAPI_GET_PROFILE
+ * @contr: controller number.
+ * @profp: result structure.
+ *
+ * Retrieve capability information for the specified ISDN controller
+ * or (for @contr == 0) the number of installed controllers.
+ * Return value: CAPI result code
+ */
+
u16 capi20_get_profile(u32 contr, struct capi_profile *profp)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
+ u16 ret;
if (contr == 0) {
- profp->ncontroller = ncards;
+ profp->ncontroller = ncontrollers;
return CAPI_NOERROR;
}
- card = get_capi_ctr_by_nr(contr);
- if (!card || card->cardstate != CARD_RUNNING)
- return CAPI_REGNOTINSTALLED;
- memcpy((void *) profp, &card->profile,
- sizeof(struct capi_profile));
- return CAPI_NOERROR;
+ mutex_lock(&capi_controller_lock);
+
+ ctr = get_capi_ctr_by_nr(contr);
+ if (ctr && ctr->state == CAPI_CTR_RUNNING) {
+ memcpy(profp, &ctr->profile, sizeof(struct capi_profile));
+ ret = CAPI_NOERROR;
+ } else
+ ret = CAPI_REGNOTINSTALLED;
+
+ mutex_unlock(&capi_controller_lock);
+ return ret;
}
EXPORT_SYMBOL(capi20_get_profile);
+/* Must be called with capi_controller_lock held. */
+static int wait_on_ctr_state(struct capi_ctr *ctr, unsigned int state)
+{
+ DEFINE_WAIT(wait);
+ int retval = 0;
+
+ ctr = capi_ctr_get(ctr);
+ if (!ctr)
+ return -ESRCH;
+
+ for (;;) {
+ prepare_to_wait(&ctr->state_wait_queue, &wait,
+ TASK_INTERRUPTIBLE);
+
+ if (ctr->state == state)
+ break;
+ if (ctr->state == CAPI_CTR_DETACHED) {
+ retval = -ESRCH;
+ break;
+ }
+ if (signal_pending(current)) {
+ retval = -EINTR;
+ break;
+ }
+
+ mutex_unlock(&capi_controller_lock);
+ schedule();
+ mutex_lock(&capi_controller_lock);
+ }
+ finish_wait(&ctr->state_wait_queue, &wait);
+
+ capi_ctr_put(ctr);
+
+ return retval;
+}
+
#ifdef AVMB1_COMPAT
static int old_capi_manufacturer(unsigned int cmd, void __user *data)
{
avmb1_extcarddef cdef;
avmb1_resetdef rdef;
capicardparams cparams;
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
struct capi_driver *driver = NULL;
capiloaddata ldata;
struct list_head *l;
- unsigned long flags;
int retval;
switch (cmd) {
cparams.irq = cdef.irq;
cparams.cardnr = cdef.cardnr;
- read_lock_irqsave(&capi_drivers_list_lock, flags);
+ mutex_lock(&capi_drivers_lock);
+
switch (cdef.cardtype) {
case AVM_CARDTYPE_B1:
list_for_each(l, &capi_drivers) {
break;
}
if (!driver) {
- read_unlock_irqrestore(&capi_drivers_list_lock, flags);
printk(KERN_ERR "kcapi: driver not loaded.\n");
- return -EIO;
- }
- if (!driver->add_card) {
- read_unlock_irqrestore(&capi_drivers_list_lock, flags);
+ retval = -EIO;
+ } else if (!driver->add_card) {
printk(KERN_ERR "kcapi: driver has no add card function.\n");
- return -EIO;
- }
+ retval = -EIO;
+ } else
+ retval = driver->add_card(driver, &cparams);
- retval = driver->add_card(driver, &cparams);
- read_unlock_irqrestore(&capi_drivers_list_lock, flags);
+ mutex_unlock(&capi_drivers_lock);
return retval;
case AVMB1_LOAD:
sizeof(avmb1_loadandconfigdef)))
return -EFAULT;
}
- card = get_capi_ctr_by_nr(ldef.contr);
- if (!card)
- return -EINVAL;
- card = capi_ctr_get(card);
- if (!card)
- return -ESRCH;
- if (card->load_firmware == NULL) {
+
+ mutex_lock(&capi_controller_lock);
+
+ ctr = get_capi_ctr_by_nr(ldef.contr);
+ if (!ctr) {
+ retval = -EINVAL;
+ goto load_unlock_out;
+ }
+
+ if (ctr->load_firmware == NULL) {
printk(KERN_DEBUG "kcapi: load: no load function\n");
- capi_ctr_put(card);
- return -ESRCH;
+ retval = -ESRCH;
+ goto load_unlock_out;
}
if (ldef.t4file.len <= 0) {
printk(KERN_DEBUG "kcapi: load: invalid parameter: length of t4file is %d ?\n", ldef.t4file.len);
- capi_ctr_put(card);
- return -EINVAL;
+ retval = -EINVAL;
+ goto load_unlock_out;
}
if (ldef.t4file.data == NULL) {
printk(KERN_DEBUG "kcapi: load: invalid parameter: dataptr is 0\n");
- capi_ctr_put(card);
- return -EINVAL;
+ retval = -EINVAL;
+ goto load_unlock_out;
}
ldata.firmware.user = 1;
ldata.configuration.data = ldef.t4config.data;
ldata.configuration.len = ldef.t4config.len;
- if (card->cardstate != CARD_DETECTED) {
+ if (ctr->state != CAPI_CTR_DETECTED) {
printk(KERN_INFO "kcapi: load: contr=%d not in detect state\n", ldef.contr);
- capi_ctr_put(card);
- return -EBUSY;
+ retval = -EBUSY;
+ goto load_unlock_out;
}
- card->cardstate = CARD_LOADING;
-
- retval = card->load_firmware(card, &ldata);
+ ctr->state = CAPI_CTR_LOADING;
+ retval = ctr->load_firmware(ctr, &ldata);
if (retval) {
- card->cardstate = CARD_DETECTED;
- capi_ctr_put(card);
- return retval;
+ ctr->state = CAPI_CTR_DETECTED;
+ goto load_unlock_out;
}
- while (card->cardstate != CARD_RUNNING) {
+ retval = wait_on_ctr_state(ctr, CAPI_CTR_RUNNING);
- msleep_interruptible(100); /* 0.1 sec */
-
- if (signal_pending(current)) {
- capi_ctr_put(card);
- return -EINTR;
- }
- }
- capi_ctr_put(card);
- return 0;
+load_unlock_out:
+ mutex_unlock(&capi_controller_lock);
+ return retval;
case AVMB1_RESETCARD:
if (copy_from_user(&rdef, data, sizeof(avmb1_resetdef)))
return -EFAULT;
- card = get_capi_ctr_by_nr(rdef.contr);
- if (!card)
- return -ESRCH;
- if (card->cardstate == CARD_DETECTED)
- return 0;
+ retval = 0;
+
+ mutex_lock(&capi_controller_lock);
- card->reset_ctr(card);
+ ctr = get_capi_ctr_by_nr(rdef.contr);
+ if (!ctr) {
+ retval = -ESRCH;
+ goto reset_unlock_out;
+ }
- while (card->cardstate > CARD_DETECTED) {
+ if (ctr->state == CAPI_CTR_DETECTED)
+ goto reset_unlock_out;
- msleep_interruptible(100); /* 0.1 sec */
+ ctr->reset_ctr(ctr);
- if (signal_pending(current))
- return -EINTR;
- }
- return 0;
+ retval = wait_on_ctr_state(ctr, CAPI_CTR_DETECTED);
+reset_unlock_out:
+ mutex_unlock(&capi_controller_lock);
+ return retval;
}
return -EINVAL;
}
#endif
+/**
+ * capi20_manufacturer() - CAPI 2.0 operation CAPI_MANUFACTURER
+ * @cmd: command.
+ * @data: parameter.
+ *
+ * Perform manufacturer specific command.
+ * Return value: CAPI result code
+ */
+
int capi20_manufacturer(unsigned int cmd, void __user *data)
{
- struct capi_ctr *card;
+ struct capi_ctr *ctr;
+ int retval;
switch (cmd) {
#ifdef AVMB1_COMPAT
if (copy_from_user(&fdef, data, sizeof(kcapi_flagdef)))
return -EFAULT;
- card = get_capi_ctr_by_nr(fdef.contr);
- if (!card)
- return -ESRCH;
+ mutex_lock(&capi_controller_lock);
- card->traceflag = fdef.flag;
- printk(KERN_INFO "kcapi: contr [%03d] set trace=%d\n",
- card->cnr, card->traceflag);
- return 0;
+ ctr = get_capi_ctr_by_nr(fdef.contr);
+ if (ctr) {
+ ctr->traceflag = fdef.flag;
+ printk(KERN_INFO "kcapi: contr [%03d] set trace=%d\n",
+ ctr->cnr, ctr->traceflag);
+ retval = 0;
+ } else
+ retval = -ESRCH;
+
+ mutex_unlock(&capi_controller_lock);
+
+ return retval;
}
case KCAPI_CMD_ADDCARD:
{
struct capi_driver *driver = NULL;
capicardparams cparams;
kcapi_carddef cdef;
- int retval;
if ((retval = copy_from_user(&cdef, data, sizeof(cdef))))
return retval;
cparams.cardtype = 0;
cdef.driver[sizeof(cdef.driver)-1] = 0;
+ mutex_lock(&capi_drivers_lock);
+
list_for_each(l, &capi_drivers) {
driver = list_entry(l, struct capi_driver, list);
if (strcmp(driver->name, cdef.driver) == 0)
if (driver == NULL) {
printk(KERN_ERR "kcapi: driver \"%s\" not loaded.\n",
cdef.driver);
- return -ESRCH;
- }
-
- if (!driver->add_card) {
+ retval = -ESRCH;
+ } else if (!driver->add_card) {
printk(KERN_ERR "kcapi: driver \"%s\" has no add card function.\n", cdef.driver);
- return -EIO;
- }
+ retval = -EIO;
+ } else
+ retval = driver->add_card(driver, &cparams);
- return driver->add_card(driver, &cparams);
+ mutex_unlock(&capi_drivers_lock);
+ return retval;
}
default:
EXPORT_SYMBOL(capi20_manufacturer);
-/* temporary hack */
-void capi20_set_callback(struct capi20_appl *ap,
- void (*callback) (unsigned int cmd, __u32 contr, void *data))
-{
- ap->callback = callback;
-}
-
-EXPORT_SYMBOL(capi20_set_callback);
-
/* ------------------------------------------------------------- */
/* -------- Init & Cleanup ------------------------------------- */
/* ------------------------------------------------------------- */
* init / exit functions
*/
+static struct notifier_block capictr_nb = {
+ .notifier_call = notify_handler,
+ .priority = INT_MAX,
+};
+
static int __init kcapi_init(void)
{
- char *p;
- char rev[32];
- int ret;
-
- ret = cdebug_init();
- if (ret)
- return ret;
- kcapi_proc_init();
-
- if ((p = strchr(revision, ':')) != NULL && p[1]) {
- strlcpy(rev, p + 2, sizeof(rev));
- if ((p = strchr(rev, '$')) != NULL && p > rev)
- *(p-1) = 0;
- } else
- strcpy(rev, "1.0");
+ int err;
- printk(KERN_NOTICE "CAPI Subsystem Rev %s\n", rev);
+ register_capictr_notifier(&capictr_nb);
- return 0;
+ err = cdebug_init();
+ if (!err)
+ kcapi_proc_init();
+ return err;
}
static void __exit kcapi_exit(void)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff