1,5 → 1,6 |
/* |
* Copyright (C) 2006 Ondrej Palkovsky |
* Copyright (C) 2006 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
39,10 → 40,10 |
* (read/write port/memory, add information to notification ipc message). |
* |
* The structure of a notification message is as follows: |
* - METHOD: interrupt number |
* - METHOD: method as registered by the SYS_IPC_REGISTER_IRQ syscall |
* - ARG1: payload modified by a 'top-half' handler |
* - ARG2: payload |
* - ARG3: payload |
* - ARG2: payload modified by a 'top-half' handler |
* - ARG3: payload modified by a 'top-half' handler |
* - in_phone_hash: interrupt counter (may be needed to assure correct order |
* in multithreaded drivers) |
*/ |
50,26 → 51,18 |
#include <arch.h> |
#include <mm/slab.h> |
#include <errno.h> |
#include <ddi/irq.h> |
#include <ipc/ipc.h> |
#include <ipc/irq.h> |
#include <atomic.h> |
#include <syscall/copy.h> |
#include <console/console.h> |
#include <print.h> |
|
typedef struct { |
SPINLOCK_DECLARE(lock); |
answerbox_t *box; |
irq_code_t *code; |
atomic_t counter; |
} ipc_irq_t; |
|
|
static ipc_irq_t *irq_conns = NULL; |
static int irq_conns_size; |
|
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/* Execute code associated with IRQ notification */ |
/** Execute code associated with IRQ notification. |
* |
* @param call Notification call. |
* @param code Top-half pseudocode. |
*/ |
static void code_execute(call_t *call, irq_code_t *code) |
{ |
int i; |
168,33 → 161,49 |
return code; |
} |
|
/** Unregister task from irq */ |
void ipc_irq_unregister(answerbox_t *box, int irq) |
/** Unregister task from IRQ notification. |
* |
* @param box Answerbox associated with the notification. |
* @param inr IRQ numbe. |
* @param devno Device number. |
*/ |
void ipc_irq_unregister(answerbox_t *box, inr_t inr, devno_t devno) |
{ |
ipl_t ipl; |
int mq = irq + IPC_IRQ_RESERVED_VIRTUAL; |
irq_t *irq; |
|
ipl = interrupts_disable(); |
spinlock_lock(&irq_conns[mq].lock); |
if (irq_conns[mq].box == box) { |
irq_conns[mq].box = NULL; |
code_free(irq_conns[mq].code); |
irq_conns[mq].code = NULL; |
irq = irq_find_and_lock(inr, devno); |
if (irq) { |
if (irq->notif_cfg.answerbox == box) { |
code_free(irq->notif_cfg.code); |
irq->notif_cfg.code = NULL; |
irq->notif_cfg.answerbox = NULL; |
irq->notif_cfg.method = 0; |
irq->notif_cfg.counter = 0; |
spinlock_unlock(&irq->lock); |
} |
|
spinlock_unlock(&irq_conns[mq].lock); |
} |
interrupts_restore(ipl); |
} |
|
/** Register an answerbox as a receiving end of interrupts notifications */ |
int ipc_irq_register(answerbox_t *box, int irq, irq_code_t *ucode) |
/** Register an answerbox as a receiving end for IRQ notifications. |
* |
* @param box Receiving answerbox. |
* @param inr IRQ number. |
* @param devno Device number. |
* @param method Method to be associated with the notification. |
* @param ucode Uspace pointer to top-half pseudocode. |
* |
* @return EBADMEM, ENOENT or EEXISTS on failure or 0 on success. |
*/ |
int |
ipc_irq_register(answerbox_t *box, inr_t inr, devno_t devno, unative_t method, irq_code_t *ucode) |
{ |
ipl_t ipl; |
irq_code_t *code; |
int mq = irq + IPC_IRQ_RESERVED_VIRTUAL; |
irq_t *irq; |
|
ASSERT(irq_conns); |
|
if (ucode) { |
code = code_from_uspace(ucode); |
if (!code) |
203,136 → 212,108 |
code = NULL; |
|
ipl = interrupts_disable(); |
spinlock_lock(&irq_conns[mq].lock); |
irq = irq_find_and_lock(inr, devno); |
if (!irq) { |
interrupts_restore(ipl); |
code_free(code); |
return ENOENT; |
} |
|
if (irq_conns[mq].box) { |
spinlock_unlock(&irq_conns[mq].lock); |
if (irq->notif_cfg.answerbox) { |
spinlock_unlock(&irq->lock); |
interrupts_restore(ipl); |
code_free(code); |
return EEXISTS; |
} |
irq_conns[mq].box = box; |
irq_conns[mq].code = code; |
atomic_set(&irq_conns[mq].counter, 0); |
spinlock_unlock(&irq_conns[mq].lock); |
|
irq->notif_cfg.answerbox = box; |
irq->notif_cfg.method = method; |
irq->notif_cfg.code = code; |
irq->notif_cfg.counter = 0; |
spinlock_unlock(&irq->lock); |
interrupts_restore(ipl); |
|
return 0; |
} |
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/** Add call to proper answerbox queue |
/** Add call to proper answerbox queue. |
* |
* Assume irq_conns[mq].lock is locked */ |
static void send_call(int mq, call_t *call) |
* Assume irq->lock is locked. |
* |
*/ |
static void send_call(irq_t *irq, call_t *call) |
{ |
spinlock_lock(&irq_conns[mq].box->irq_lock); |
list_append(&call->link, &irq_conns[mq].box->irq_notifs); |
spinlock_unlock(&irq_conns[mq].box->irq_lock); |
spinlock_lock(&irq->notif_cfg.answerbox->irq_lock); |
list_append(&call->link, &irq->notif_cfg.answerbox->irq_notifs); |
spinlock_unlock(&irq->notif_cfg.answerbox->irq_lock); |
|
waitq_wakeup(&irq_conns[mq].box->wq, 0); |
waitq_wakeup(&irq->notif_cfg.answerbox->wq, WAKEUP_FIRST); |
} |
|
/** Send notification message |
* |
*/ |
void ipc_irq_send_msg(int irq, unative_t a1, unative_t a2, unative_t a3) |
void ipc_irq_send_msg(irq_t *irq, unative_t a1, unative_t a2, unative_t a3) |
{ |
call_t *call; |
int mq = irq + IPC_IRQ_RESERVED_VIRTUAL; |
|
spinlock_lock(&irq_conns[mq].lock); |
spinlock_lock(&irq->lock); |
|
if (irq_conns[mq].box) { |
if (irq->notif_cfg.answerbox) { |
call = ipc_call_alloc(FRAME_ATOMIC); |
if (!call) { |
spinlock_unlock(&irq_conns[mq].lock); |
spinlock_unlock(&irq->lock); |
return; |
} |
call->flags |= IPC_CALL_NOTIF; |
IPC_SET_METHOD(call->data, irq); |
IPC_SET_METHOD(call->data, irq->notif_cfg.method); |
IPC_SET_ARG1(call->data, a1); |
IPC_SET_ARG2(call->data, a2); |
IPC_SET_ARG3(call->data, a3); |
/* Put a counter to the message */ |
call->private = atomic_preinc(&irq_conns[mq].counter); |
call->private = ++irq->notif_cfg.counter; |
|
send_call(mq, call); |
send_call(irq, call); |
} |
spinlock_unlock(&irq_conns[mq].lock); |
spinlock_unlock(&irq->lock); |
} |
|
/** Notify task that an irq had occurred. |
* |
* We expect interrupts to be disabled |
* We expect interrupts to be disabled and the irq->lock already held. |
*/ |
void ipc_irq_send_notif(int irq) |
void ipc_irq_send_notif(irq_t *irq) |
{ |
call_t *call; |
int mq = irq + IPC_IRQ_RESERVED_VIRTUAL; |
|
ASSERT(irq_conns); |
spinlock_lock(&irq_conns[mq].lock); |
ASSERT(irq); |
|
if (irq_conns[mq].box) { |
if (irq->notif_cfg.answerbox) { |
call = ipc_call_alloc(FRAME_ATOMIC); |
if (!call) { |
spinlock_unlock(&irq_conns[mq].lock); |
return; |
} |
call->flags |= IPC_CALL_NOTIF; |
/* Put a counter to the message */ |
call->private = atomic_preinc(&irq_conns[mq].counter); |
call->private = ++irq->notif_cfg.counter; |
/* Set up args */ |
IPC_SET_METHOD(call->data, irq); |
IPC_SET_METHOD(call->data, irq->notif_cfg.method); |
|
/* Execute code to handle irq */ |
code_execute(call, irq_conns[mq].code); |
code_execute(call, irq->notif_cfg.code); |
|
send_call(mq, call); |
send_call(irq, call); |
} |
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spinlock_unlock(&irq_conns[mq].lock); |
} |
|
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/** Initialize table of interrupt handlers |
/** Disconnect all IRQ notifications from an answerbox. |
* |
* @param irqcount Count of required hardware IRQs to be supported |
* @param box Answerbox for which we want to carry out the cleanup. |
*/ |
void ipc_irq_make_table(int irqcount) |
{ |
int i; |
|
irqcount += IPC_IRQ_RESERVED_VIRTUAL; |
|
irq_conns_size = irqcount; |
irq_conns = malloc(irqcount * (sizeof(*irq_conns)), 0); |
for (i=0; i < irqcount; i++) { |
spinlock_initialize(&irq_conns[i].lock, "irq_ipc_lock"); |
irq_conns[i].box = NULL; |
irq_conns[i].code = NULL; |
} |
} |
|
/** Disconnect all irq's notifications |
* |
* @todo It may be better to do some linked list, so that |
* we wouldn't need to go through whole array every cleanup |
*/ |
void ipc_irq_cleanup(answerbox_t *box) |
{ |
int i; |
ipl_t ipl; |
|
for (i=0; i < irq_conns_size; i++) { |
ipl = interrupts_disable(); |
spinlock_lock(&irq_conns[i].lock); |
if (irq_conns[i].box == box) |
irq_conns[i].box = NULL; |
spinlock_unlock(&irq_conns[i].lock); |
interrupts_restore(ipl); |
/* TODO */ |
} |
} |
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/** @} |
*/ |