diff options
Diffstat (limited to 'meta-agl/meta-agl-basesystem/recipes-core/kernel-module-evklib/kernel-module-evklib-1.0.0/evk_lib.c')
| -rw-r--r-- | meta-agl/meta-agl-basesystem/recipes-core/kernel-module-evklib/kernel-module-evklib-1.0.0/evk_lib.c | 2246 |
1 files changed, 2246 insertions, 0 deletions
diff --git a/meta-agl/meta-agl-basesystem/recipes-core/kernel-module-evklib/kernel-module-evklib-1.0.0/evk_lib.c b/meta-agl/meta-agl-basesystem/recipes-core/kernel-module-evklib/kernel-module-evklib-1.0.0/evk_lib.c new file mode 100644 index 00000000..d5c1718e --- /dev/null +++ b/meta-agl/meta-agl-basesystem/recipes-core/kernel-module-evklib/kernel-module-evklib-1.0.0/evk_lib.c @@ -0,0 +1,2246 @@ +/* + * drivers/agl/evk_lib.c + * + * Event library (kernel space part) + * + * @copyright Copyright (c) 2016-2019 TOYOTA MOTOR CORPORATION. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <generated/autoconf.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/wait.h> +#include <linux/poll.h> +#include <linux/list.h> +#include <asm/uaccess.h> +#include <linux/errno.h> +#include <linux/vmalloc.h> + +#include <linux/proc_fs.h> +#include <linux/seq_file.h> + +#include <linux/device.h> +#include <linux/cdev.h> + +#ifndef STANDARD_INT_DEFINITIONS +#define STANDARD_INT_DEFINITIONS +typedef __u8 UINT8; +typedef __u16 UINT16; +typedef __u32 UINT32; +typedef __u64 UINT64; +typedef __s8 INT8; +typedef __s16 INT16; +typedef __s32 INT32; +typedef __s64 INT64; +#endif /* !STANDARD_INT_DEFINITIONS */ + +#define ENABLE_PROC_FS 1 + +#include <agldd/evk_lib.h> + +/** @addtogroup EV_in */ +/** @{ */ +/** In Linux2.4, list_for_each_entry is not provided, so it is prepared by self (in 2.6) + */ +#ifdef list_for_each_entry +#define __LINUX_26_OR_HIGHER +#endif + +#ifndef __LINUX_26_OR_HIGHER /* linux v2.4 */ + +#define list_for_each_entry(pos, head, member) \ + for (pos = list_entry((head)->next, typeof(*pos), member), \ + prefetch(pos->member.next); \ + &pos->member != (head); \ + pos = list_entry(pos->member.next, typeof(*pos), member), \ + prefetch(pos->member.next)) + +#define list_for_each_entry_safe(pos, n, head, member) \ + for (pos = list_entry((head)->next, typeof(*pos), member), \ + n = list_entry(pos->member.next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.next, typeof(*n), member)) + +#else /* linux v2.6 */ + +#include <linux/jiffies.h> + +#endif /* linux v2.6 */ + +#define EVK_assert(cond, mesg) \ + if (!(cond)) { \ + printk(KERN_ALERT "[EVK]ASSERT(pid:%d): " #cond " at %s:%d; " \ + #mesg "\n", current->pid, __FILE__, __LINE__); \ + do {} while(1); \ + } + +#define EVK_BUG(mesg) \ + printk(KERN_ALERT "[EVK]BUG: " mesg); \ + do {} while(1); + +#if 0 +#define EVK_info0(s) printk(KERN_ALERT "[EVK]INFO: " s) +#define EVK_info1(s, t) printk(KERN_ALERT "[EVK]INFO: " s, t) +#else +#define EVK_info0(s) +#define EVK_info1(s, t) +#endif + +static int devmajor = EVK_DEV_MAJOR; +static int devminor = 0; +static int nrdevs = 1; +static struct cdev cdev; +static struct class *pClass; + +DEFINE_SEMAPHORE(evk_mtx); +static int down_pid; +static int down_line; +#define EVK_mutex_lock() { \ + down(&evk_mtx); \ + down_pid = current->pid; \ + down_line = __LINE__; \ +} +#define EVK_mutex_unlock() (up(&evk_mtx)) + +#ifdef EVK_USE_KMALLOC +#define evk_malloc(s) kmalloc((s), GFP_KERNEL) +#define evk_free kfree +#else // use vmalloc (this is the default) +#define evk_malloc(s) vmalloc((s)) +#define evk_free vfree +#endif + +enum { + evk_mem_user = 0, + evk_mem_kernel, +}; + +enum { + evk_enum_flag, + evk_enum_flag64, + evk_enum_queue, +}; + +#define GET_USER_OR_KERNEL(to, from) \ +({ \ + int err; \ + if (mem == evk_mem_user) { \ + err = __get_user((to), &(from)); \ + } else { \ + (to) = (from); \ + err = 0; \ + } \ + err; \ +}) + +#define PUT_USER_OR_KERNEL(value, to) \ +({ \ + int err; \ + if (mem == evk_mem_user) { \ + err = __put_user((value), &(to)); \ + } else { \ + (to) = (value); \ + err = 0; \ + } \ + err; \ +}) + + +/** @brief Common part of the flag structure and message queue structure */ +#define EVK_COMMON_QUEUE_ELEMS \ + struct list_head list; /**< List structure */ \ + wait_queue_head_t wq_head; /**< Wait_queue of a process waiting for a queue */\ + EV_ID queueID; /**< Flag ID/Queue ID */ \ + UINT32 seq_num; /**< Order of event arrival */ \ + pid_t read_pid; /**< Read process ID */ \ + pid_t pid; /**< Owning process ID */ + +/** @brief Common part of the flag structure and message queue structure */ +struct common_queue { + EVK_COMMON_QUEUE_ELEMS +}; + +/** @brief Flag structure */ +struct flag { + EVK_COMMON_QUEUE_ELEMS + UINT32 value;/**< Flags value */ +}; +#define EVK_PFLAG(queue) ((struct flag*)queue) + +/** @brief 64-bit flag structure */ +struct flag64 { + EVK_COMMON_QUEUE_ELEMS + UINT64 value;/**< Flags value */ +}; +#define EVK_PFLAG64(queue) ((struct flag64*)queue) + +/** @brief Message queue structure */ +struct message_queue { + EVK_COMMON_QUEUE_ELEMS + UINT8 type;/**< Type */ + UINT8 length;/**< Queue length */ + UINT8 num;/**< Number of messages stored */ + UINT8 readptr;/**< Next read position(0~length-1) */ + UINT32 max_bytes;/**< -Maximum bytes per message */ + UINT8 *message;/**< Message storage area (ring buffer) */ +}; +#define EVK_PQUEUE(queue) ((struct message_queue*)queue) + +/** @brief Number of bytes to allocate per message + * + * This function allocates an area to store the number of bytes actually stored, the time of occurrence, + * and the senderInfo, in addition to the number of bytes specified by max_bytes. + */ +#define EVK_message_block_size(max_bytes) (sizeof(UINT32) * 3 + (max_bytes)) + +#define HASH_KEY 15 + +/** @brief Maximum number of flags used by all systems */ +#define EVK_MAX_FLAGS 48 +/** @brief Maximum number of 64-bit flags used by all systems */ +#define EVK_MAX_FLAG64S 4 +/** @brief Maximum number of message event queues used by all systems */ +/* M1SP BM3547 MESSAGE_QUEUES 128->144 */ +/* M9AT BM2066 MESSAGE_QUEUES 144->218 */ +#define EVK_MAX_MESSAGE_QUEUES 224 + +/** @brief Allocate flag structure statically */ +static struct flag _flag_pool[EVK_MAX_FLAGS]; +/** @brief Statically allocates a 64-bit flag structure */ +static struct flag64 _flag64_pool[EVK_MAX_FLAG64S]; +/** @brief Beginning of the list of unused flags */ +static LIST_HEAD(flag_pool); +/** @brief Beginning of the list of unused 64-bit flags */ +static LIST_HEAD(flag64_pool); + +/** @brief Allocate message queue structure statically */ +static struct message_queue _message_queue_pool[EVK_MAX_MESSAGE_QUEUES]; +/** @brief Top of the list of unused message queues */ +static LIST_HEAD(message_queue_pool); + +/** @brief List of Flags/Message Queues in Use + * + * Connects the usage flag/message queue to a list for each hash value obtained from the ID. + * The hash value is the remainder of the ID divided by HASH_KEY. + */ +static struct list_head queue_entry[HASH_KEY]; + +/** @brief Sequence number to use during automatic ID assignment */ +static EV_ID sequence_id = 0; + +/** @brief Number to be assigned in order of occurrence of the event */ +static UINT32 sequence_number = 0; + +unsigned int +evk_get_queue_entry(struct list_head **entries) +{ + if (entries) { + *entries = queue_entry; + return HASH_KEY; + } + return 0; +} + +static __inline__ int +calc_hash(UINT32 val) +{ + return val % HASH_KEY; +} + +static __inline__ +struct flag * +alloc_flag(void) +{ + struct flag *queue; + //EVK_assert(!list_empty(&flag_pool), "flag pool empty"); + if (list_empty(&flag_pool)) { + printk("%s ERROR: flag pool empty\n", __func__); + return NULL; + } + queue = (struct flag *)flag_pool.next; + list_del_init(&(queue->list)); + return queue; +} + +static __inline__ +struct flag64 * +alloc_flag64(void) +{ + struct flag64 *queue; + //EVK_assert(!list_empty(&flag64_pool), "flag64 pool empty"); + if (list_empty(&flag64_pool)) { + printk("%s ERROR: flag64 pool empty\n", __func__); + return NULL; + } + queue = (struct flag64 *)flag64_pool.next; + list_del_init(&(queue->list)); + return queue; +} + +static __inline__ void +free_flag(struct flag *queue) +{ + list_add((struct list_head *)queue, &flag_pool); +} + +static __inline__ void +free_flag64(struct flag64 *queue) +{ + list_add((struct list_head *)queue, &flag64_pool); +} + +static __inline__ +struct message_queue * +alloc_message_queue(void) +{ + struct message_queue *queue; + //EVK_assert(!list_empty(&message_queue_pool), "message queue pool empty"); + if (list_empty(&message_queue_pool)) { + printk("%s ERROR: message queue pool empty\n", __func__); + return NULL; + } + queue = (struct message_queue *)message_queue_pool.next; + list_del_init(&(queue->list)); + queue->message = NULL; + return queue; +} + +static __inline__ void +free_message_queue(struct message_queue *queue) +{ + if (queue->message != NULL) { + evk_free(queue->message); + queue->message = NULL; + } + list_add((struct list_head *)queue, &message_queue_pool); +} + +static __inline__ +struct common_queue * +find_queue_entry(EV_ID queueID) +{ + struct list_head *list; + struct common_queue *queue; + int hash = calc_hash(queueID); + list = &(queue_entry[hash]); + list_for_each_entry(queue, list, list) { /* pgr0060 */ /* pgr0039 */ + if (queue->queueID == queueID) { + return queue; + } + } + return NULL; +} + +static __inline__ void +attach_queue_entry(struct common_queue *queue, EV_ID queueID) +{ + int hash = calc_hash(queueID); + list_add_tail((struct list_head *)queue, &(queue_entry[hash])); +} + +static __inline__ void +detach_queue_entry(struct common_queue *queue) +{ + list_del_init((struct list_head *)queue); +} + +static __inline__ void +init_common_queue(struct common_queue *queue, EV_ID queueID) +{ + queue->queueID = queueID; + queue->pid = current->pid; + queue->read_pid = 0; + init_waitqueue_head(&(queue->wq_head)); +} + +static __inline__ void +evk_init_flag(struct flag *queue, EV_ID queueID) +{ + init_common_queue((struct common_queue *)queue, queueID); + queue->value = 0; +} + +static __inline__ void +evk_init_flag64(struct flag64 *queue, EV_ID queueID) +{ + init_common_queue((struct common_queue *)queue, queueID); + queue->value = 0; +} + +static __inline__ int +evk_init_message_queue(struct message_queue *queue, EV_ID queueID, + UINT8 length, UINT32 max_bytes, UINT8 type) +{ + init_common_queue((struct common_queue *)queue, queueID); + queue->type = type; + queue->length = length; + queue->max_bytes = max_bytes; + queue->num = 0; + queue->readptr = 0; + EVK_assert(queue->message == NULL, "message buffer was not freed"); + queue->message = evk_malloc(length * EVK_message_block_size(max_bytes)); + EVK_assert(queue->message != NULL, "can't alloc message buffer"); + return 0; +} + +static void +__list_queues(void) +{ + struct list_head *list; + struct common_queue *queue; + int i; + for(i = 0 ; i < HASH_KEY ; i++) { + list = &(queue_entry[i]); + if (!list_empty(list)) { + printk(KERN_ALERT "%d->", i); + list_for_each_entry(queue, list, list) { /* pgr0060 */ /* pgr0039 */ + printk("%x[%x] ", queue->queueID, queue->seq_num); + } + printk("\n"); + } + } +} + +static int +evk_destroy_queue(EV_ID queueID) +{ + struct common_queue *queue; + int err = 0; + EVK_info1("flag destroy %x\n", queueID); + + EVK_mutex_lock(); /*************************************/ + queue = find_queue_entry(queueID); + if (queue == NULL) { + err = -ENOENT; + goto finish; + } + + detach_queue_entry(queue); + + /* wake up processes before destruction */ + wake_up_interruptible(&(queue->wq_head)); + + init_common_queue(queue, EV_INVALID_ID); + + if (EV_ID_IS_FLAG(queueID)) { + free_flag((struct flag *)queue); + } else if (EV_ID_IS_FLAG64(queueID)) { + free_flag64((struct flag64 *)queue); + } else if (EV_ID_IS_QUEUE(queueID)) { + free_message_queue((struct message_queue *)queue); + } + //__list_queues(); + finish: + EVK_mutex_unlock(); /*************************************/ + return err; +} + +static int +evk_open(struct inode *inode, struct file *file) +{ + // Recording of current and measures not to be read or deleted from others are required. */ + file->private_data = (void *)EV_INVALID_ID; + return 0; +} + +static int +evk_close(struct inode *inode, struct file *file) +{ + if (EV_ID_IS_VALID((EV_ID)file->private_data)) { + evk_destroy_queue((EV_ID)file->private_data); + } + file->private_data = (void *)EV_INVALID_ID; + return 0; +} + +static int +evk_create_flag(EV_ID queueID) +{ + struct flag *queue; + int err = 0; + EVK_info1("flag create %x\n", queueID); + + EVK_mutex_lock(); /*************************************/ + + queue = (struct flag *)find_queue_entry(queueID); + if (queue != NULL) { + err = -EEXIST; + goto finish; + } + + queue = alloc_flag(); + if (queue == NULL) { + err = -ENOMEM; + goto finish; + } + + evk_init_flag(queue, queueID); + attach_queue_entry((struct common_queue *)queue, queueID); + + //__list_queues(); + finish: + EVK_mutex_unlock(); /***********************************/ + return err; +} + +static int +evk_create_flag64(EV_ID queueID) +{ + struct flag64 *queue; + int err = 0; + EVK_info1("flag64 create %x\n", queueID); + + EVK_mutex_lock(); /*************************************/ + + queue = (struct flag64 *)find_queue_entry(queueID); + if (queue != NULL) { + err = -EEXIST; + goto finish; + } + + queue = alloc_flag64(); + if (queue == NULL) { + err = -ENOMEM; + goto finish; + } + + evk_init_flag64(queue, queueID); + attach_queue_entry((struct common_queue *)queue, queueID); + + //__list_queues(); + finish: + EVK_mutex_unlock(); /***********************************/ + return err; +} + +static int +evk_create_message_queue(EV_ID queueID, UINT8 length, + UINT32 max_bytes, EV_Message_Queue_Type type) +{ + struct message_queue *queue; + int err; + EVK_info1("message create %x\n", queueID); + + err = 0; + + EVK_mutex_lock(); /*************************************/ + + queue = (struct message_queue *)find_queue_entry(queueID); + if (queue != NULL) { + err = -EEXIST; + goto finish; + } + + queue = alloc_message_queue(); + if (queue == NULL) { + err = -ENOMEM; + goto finish; + } + + err = evk_init_message_queue(queue, queueID, length, max_bytes, type); + if (err == 0) { + attach_queue_entry((struct common_queue *)queue, queueID); + } else { + free_message_queue(queue); + } + + //__list_queues(); + finish: + EVK_mutex_unlock(); /***********************************/ + return err; +} + +static EV_ID +get_seq_id(void) +{ + EV_ID ret; + sequence_id++; + if ((sequence_id & EV_RESERVED_BIT) != 0) {/* round to 1 */ + sequence_id = 1; + EVK_info0("auto ID rounded\n"); + } + ret = sequence_id; + return ret; +} + +static int +evk_alloc_flagID(EV_ID *queueID) +{ + EV_ID seq_id; + + EVK_mutex_lock(); /*************************************/ + do { + seq_id = get_seq_id(); + seq_id |= (EV_ID_BIT | EV_FLAG_BIT | EV_AUTO_ID_BIT); + } while(find_queue_entry(seq_id) != NULL); + EVK_mutex_unlock(); /*************************************/ + + *queueID = seq_id; + return 0; +} + +static int +evk_alloc_flag64ID(EV_ID *queueID) +{ + EV_ID seq_id; + + EVK_mutex_lock(); /*************************************/ + do { + seq_id = get_seq_id(); + seq_id |= (EV_ID_BIT | EV_FLAG64_BIT | EV_AUTO_ID_BIT); + } while(find_queue_entry(seq_id) != NULL); + EVK_mutex_unlock(); /*************************************/ + + *queueID = seq_id; + return 0; +} + +static int +evk_alloc_queueID(EV_ID *queueID) +{ + EV_ID seq_id; + + EVK_mutex_lock(); /*************************************/ + do { + seq_id = get_seq_id(); + seq_id |= (EV_ID_BIT | EV_QUEUE_BIT | EV_AUTO_ID_BIT); + } while(find_queue_entry(seq_id) != NULL); + EVK_mutex_unlock(); /*************************************/ + + *queueID = seq_id; + return 0; +} + +static int +evk_store_flag(EV_Flag *ev, int mem) +{ + struct flag *queue; + int ret = 0; + EV_ID flagID; + UINT32 bits; + + if (GET_USER_OR_KERNEL(flagID, ev->flagID)) /* pgr0039 */ + return -EFAULT; + if (GET_USER_OR_KERNEL(bits, ev->bits)) /* pgr0039 */ + return -EFAULT; + + EVK_mutex_lock(); /*************************************/ + + queue = (struct flag *)find_queue_entry(flagID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("set_flag: No such ID %x\n", flagID); + ret = -ENOENT; + goto finish; + } + + if (queue->value == 0) { + queue->seq_num = sequence_number++; + } + queue->value |= bits; /* pgr0000 */ + + wake_up_interruptible(&(queue->wq_head)); + + finish: + EVK_mutex_unlock(); /***********************************/ + return ret; +} + +static int +evk_store_flag64(EV_Flag64 *ev, int mem) +{ + struct flag64 *queue; + int ret = 0; + EV_ID flagID; + UINT64 bits = 0; + + if (GET_USER_OR_KERNEL(flagID, ev->flagID)) /* pgr0039 */ + return -EFAULT; + //GET_USER_OR_KERNEL(bits, ev->bits); /* pgr0039 */ + if (mem == evk_mem_user) { + if (copy_from_user(&bits, &(ev->bits), sizeof(bits))) + return -EFAULT; + } else { + bits = ev->bits; + } + + EVK_mutex_lock(); /*************************************/ + + queue = (struct flag64 *)find_queue_entry(flagID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("set_flag64: No such ID %x\n", flagID); + ret = -ENOENT; + goto finish; + } + + if (queue->value == 0) { + queue->seq_num = sequence_number++; + } + queue->value |= bits; /* pgr0000 */ + + wake_up_interruptible(&(queue->wq_head)); + + finish: + EVK_mutex_unlock(); /***********************************/ + return ret; +} + +static int +evk_store_message(EV_Message *ev, int mem) +{ + struct message_queue *queue; + UINT8 *ptr; + UINT8 writeptr; + int ret = 0; + EV_ID queueID; + UINT32 length, senderInfo, seq; + + if (GET_USER_OR_KERNEL(queueID, ev->queueID)) /* pgr0039 */ + return -EFAULT; + if (GET_USER_OR_KERNEL(length, ev->length)) /* pgr0039 */ + return -EFAULT; + if (GET_USER_OR_KERNEL(senderInfo, ev->senderInfo)) /* pgr0039 */ + return -EFAULT; + + EVK_mutex_lock(); /*************************************/ + + queue = (struct message_queue *)find_queue_entry(queueID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("store_message: No such queueID %x\n", queueID); + ret = -ENOENT; + goto finish; + } + + if (length > queue->max_bytes) { /* pgr0000 */ + EVK_info0("store_message: message is too long for the queue"); + ret = -EINVAL; + goto finish; + } + + if (queue->num == queue->length) { + + switch(queue->type) { + case EV_MESSAGE_QUEUE_TYPE_BUSY: + EVK_info1("store_message: queue %x BUSY\n", queueID); + ret = -EBUSY; + goto finish; + break; + + case EV_MESSAGE_QUEUE_TYPE_FIFO: + queue->readptr++; + queue->readptr %= queue->length; + queue->num--; + break; + + case EV_MESSAGE_QUEUE_TYPE_REPLACE: + queue->num--; + break; + + default: + EVK_BUG("internal error in store_message\n"); + ret = -EINVAL; + goto finish; + break; + } + } + + writeptr = (queue->readptr + queue->num) % queue->length; + ptr = queue->message + writeptr * EVK_message_block_size(queue->max_bytes); + + memcpy(ptr, &length, sizeof(length)); + ptr += sizeof(length); + memcpy(ptr, &senderInfo, sizeof(senderInfo)); + ptr += sizeof(senderInfo); + seq = sequence_number++; + memcpy(ptr, &seq, sizeof(seq)); + ptr += sizeof(seq); + + if (queue->num == 0) { + queue->seq_num = seq; + } + queue->num++; + + if (mem == evk_mem_user) { + if (copy_from_user(ptr, ev->message, length)) { + ret = -EFAULT; + goto finish; + } + } else { + memcpy(ptr, ev->message, length); + } + + wake_up_interruptible(&(queue->wq_head)); + + finish: + EVK_mutex_unlock(); /***********************************/ + + return ret; +} + +static int +evk_set_poll(struct file *filp, EV_ID queueID) +{ + struct common_queue *queue; + int err = 0; + + EVK_mutex_lock(); /*************************************/ + + queue = find_queue_entry(queueID); + if (queue == NULL) { + EVK_info1("set_poll: ID %x not found.\n", queueID); + err = -ENOENT; + goto finish; + } + + filp->private_data = (void *)queueID; + + finish: + EVK_mutex_unlock(); /*************************************/ + return err; +} + +static int +evk_get_flag_event(EV_Event *ev, int peek_only, int wait, int mem) +{ + struct flag *queue, *queue2; + int err = 0; + int found = 0; + EV_ID flagID; + + if (GET_USER_OR_KERNEL(flagID, ev->u.flag.flagID)) /* pgr0039 */ + return -EFAULT; + + retry: + + queue = (struct flag *)find_queue_entry(flagID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("get_flag: No such flag %x\n", flagID); + err = -ENOENT; + goto finish; + } + + if (queue->value != 0) { + UINT32 bits; + + if (GET_USER_OR_KERNEL(bits, ev->u.flag.bits)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + + if (bits == 0 || ((bits & queue->value) != 0)) { /* pgr0000 */ + + if (PUT_USER_OR_KERNEL(EV_EVENT_Flag, ev->type)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (PUT_USER_OR_KERNEL(queue->value, ev->u.flag.bits)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + found = 1; + + queue->read_pid = current->pid; + if (peek_only) { + ; + } else { + queue->value = 0; + } + } + } + finish: + + if (queue != NULL && wait != 0 && found == 0) { + int wait_ret; + EVK_mutex_unlock(); /*************************************/ + + wait_ret + = wait_event_interruptible(queue->wq_head, + ((queue2 = (struct flag *)find_queue_entry(flagID)) == NULL + || queue2->value != 0)); + + EVK_mutex_lock(); /*************************************/ + + if (wait_ret != 0) { + EVK_info1("Interrupted while waiting for flag %x\n", flagID); + err = -EINTR; + } else if (queue2 == NULL) { /* pgr0039 */ + EVK_info1("flag %x was destroyed while waiting for it\n", flagID); + err = -ENOENT; + } else { + goto retry; + } + } + return err; +} + +static int +evk_get_flag64_event(EV_Event *ev, int peek_only, int wait, int mem) +{ + struct flag64 *queue, *queue2; + int err = 0; + int found = 0; + EV_ID flagID; + + if (GET_USER_OR_KERNEL(flagID, ev->u.flag64.flagID)) /* pgr0039 */ + return -EFAULT; + + retry: + + queue = (struct flag64 *)find_queue_entry(flagID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("get_flag64: No such flag %x\n", flagID); + err = -ENOENT; + goto finish; + } + + if (queue->value != 0) { + UINT64 bits = 0; + + //GET_USER_OR_KERNEL(bits, ev->u.flag64.bits); /* pgr0039 */ + if (mem == evk_mem_user) { + if (copy_from_user(&bits, &(ev->u.flag64.bits), sizeof(bits))) { + err = -EFAULT; + goto finish; + } + } else { + bits = ev->u.flag64.bits; + } + + if (bits == 0 || ((bits & queue->value) != 0)) { /* pgr0000 */ + + if (PUT_USER_OR_KERNEL(EV_EVENT_Flag64, ev->type)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (PUT_USER_OR_KERNEL(queue->value, ev->u.flag64.bits)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + found = 1; + + queue->read_pid = current->pid; + if (peek_only) { + ; + } else { + queue->value = 0; + } + } + } + finish: + + if (queue != NULL && wait != 0 && found == 0) { + int wait_ret; + EVK_mutex_unlock(); /*************************************/ + + wait_ret + = wait_event_interruptible(queue->wq_head, + ((queue2 = (struct flag64 *)find_queue_entry(flagID)) == NULL + || queue2->value != 0)); + + EVK_mutex_lock(); /*************************************/ + + if (wait_ret != 0) { + EVK_info1("Interrupted while waiting for flag %x\n", flagID); + err = -EINTR; + } else if (queue2 == NULL) { /* pgr0039 */ + EVK_info1("flag %x was destroyed while waiting for it\n", flagID); + err = -ENOENT; + } else { + goto retry; + } + } + return err; +} + +static __inline__ void +remove_message_event(struct message_queue *queue, UINT8 removeptr) +{ + UINT8 *ptr; + int i, from, to; + UINT8 *pFrom, *pTo; + UINT32 size; + int offset; + + queue->num--; + offset = (int)removeptr - (int)(queue->readptr); + + if (offset == 0) {/* To remove the head of the queue, advance the queue by one readptr only */ + queue->readptr++; + queue->readptr %= queue->length; + + if (queue->num > 0) { + /* Reset the occurrence time of the first message in the queue to the occurrence time of the queue. */ + ptr = (queue->message + + queue->readptr * EVK_message_block_size(queue->max_bytes)); + ptr += sizeof(UINT32) * 2; + memcpy(&(queue->seq_num), ptr, sizeof(UINT32)); + } + return; + } + if (offset < 0) { + offset += queue->length; + } + if (offset == queue->num) {/* Do nothing to delete the end of the queue */ + return; + } + + /* To delete a message in the middle of the queue, pack the following messages. */ + to = removeptr; + size = EVK_message_block_size(queue->max_bytes); + + for(i = 0 ; i < queue->num - offset ; i++, to++) { + to %= queue->length; + from = (to + 1) % queue->length; + pFrom = queue->message + from * size; + pTo = queue->message + to * size; + memcpy(pTo, pFrom, size); + } +} + +static int +evk_get_message_event(EV_Event *ev, int peek_only, int wait, int mem) +{ + struct message_queue *queue, *queue2; + int err = 0; + EV_ID queueID; + UINT8 num; + UINT8 readptr; + UINT8 i, *ptr; + int matched = 0; + + if (GET_USER_OR_KERNEL(queueID, ev->u.message.queueID)) /* pgr0039 */ + return -EFAULT; + + retry: + queue = (struct message_queue *)find_queue_entry(queueID); /* pgr0000 */ + if (queue == NULL) { + EVK_info1("get_message: No such queue %x\n", queueID); + err = -ENOENT; + goto finish; + } + + num = queue->num; + readptr = queue->readptr; + for(i = 0 ; i < num ; i++, readptr = (readptr + 1) % queue->length) { + UINT32 size, senderInfo, seq; + UINT32 length, q_senderInfo; + + ptr = (queue->message + + readptr * EVK_message_block_size(queue->max_bytes)); + + memcpy(&size, ptr, sizeof(size)); + ptr += sizeof(size); + memcpy(&senderInfo, ptr, sizeof(senderInfo)); + ptr += sizeof(senderInfo); + memcpy(&seq, ptr, sizeof(seq)); + ptr += sizeof(seq); + + if (GET_USER_OR_KERNEL(length, ev->u.message.length)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (GET_USER_OR_KERNEL(q_senderInfo, ev->u.message.senderInfo)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + + if (q_senderInfo == 0 && length == 0) { /* pgr0000 */ + matched = 1; + } else if (q_senderInfo != 0 && q_senderInfo == senderInfo) { + matched = 1; + } else if (length > 0 && size >= length) { /* pgr0000 */ + + if (mem == evk_mem_user) { + void *compbytes; + compbytes = evk_malloc(length); + if (compbytes != NULL) { + if (copy_from_user(compbytes, &(ev->u.message.message), length)) { + err = -EFAULT; + evk_free(compbytes); + goto finish; + } + if (memcmp(ptr, compbytes, length) == 0) { + matched = 1; + } + evk_free(compbytes); + } + } else { + if (memcmp(ptr, ev->u.message.message, length) == 0) { + matched = 1; + } + } + } + + if (matched) { + + if (PUT_USER_OR_KERNEL(EV_EVENT_Message, ev->type)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (PUT_USER_OR_KERNEL(size, ev->u.message.length)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (PUT_USER_OR_KERNEL(senderInfo, ev->u.message.senderInfo)) { /* pgr0039 */ + err = -EFAULT; + goto finish; + } + if (mem == evk_mem_user) { + if (copy_to_user(ev->u.message.message, ptr, size)) { + err = -EFAULT; + goto finish; + } + } else { + memcpy(ev->u.message.message, ptr, size); + } + + queue->read_pid = current->pid; + if (peek_only) { + ; + } else { + remove_message_event(queue, readptr); + } + goto finish; + } + } + + finish: + + if (queue != NULL && wait != 0 && matched == 0) { + int wait_ret; + EVK_mutex_unlock(); /*************************************/ + wait_ret + = wait_event_interruptible(queue->wq_head, + ((queue2 = (struct message_queue *)find_queue_entry(queueID))==NULL + || queue2->num > 0)); + + EVK_mutex_lock(); /*************************************/ + + if (wait_ret != 0) { + EVK_info1("Interrupted while waiting for queue %x\n", queueID); + err = -EINTR; + } else if (queue2 == NULL) { /* pgr0039 */ + EVK_info1("queue %x was destroyed while waiting for it\n", queueID); + err = -ENOENT; + } else { + goto retry; + } + } + + return err; +} + +static int +evk_get_event(EV_Event *ev, int peek_only, int wait, int mem) +{ + EV_Type type; + int ret = -EINVAL; + + if (GET_USER_OR_KERNEL(type, ev->type)) /* pgr0039 */ + return -EFAULT; + if (PUT_USER_OR_KERNEL(EV_EVENT_None, ev->type)) /* pgr0039 */ + return -EFAULT; + + switch(type) { /* pgr0000 */ + case EV_EVENT_Flag: + EVK_mutex_lock(); /*************************************/ + ret = evk_get_flag_event(ev, peek_only, wait, mem); + EVK_mutex_unlock(); /*************************************/ + break; + + case EV_EVENT_Flag64: + EVK_mutex_lock(); /*************************************/ + ret = evk_get_flag64_event(ev, peek_only, wait, mem); + EVK_mutex_unlock(); /*************************************/ + break; + + case EV_EVENT_Message: + EVK_mutex_lock(); /*************************************/ + ret = evk_get_message_event(ev, peek_only, wait, mem); + EVK_mutex_unlock(); /*************************************/ + break; + + default: + break; + } + return ret; +} + +static int +evk_get_next_event(EVK_Next_Event_Query *query /* user */, int peek_only) +{ + EV_ID *ids; + int i, num, ret, first, found; + struct common_queue *queue; + UINT32 seq_oldest = 0; + + ids = (EV_ID *)kmalloc( (sizeof(EV_ID)*EV_MAX_IDS_IN_PROCESS), GFP_KERNEL ); + if( ids == NULL ){ + return -ENOMEM; + } + + if (__get_user(num, &(query->num))) { /* pgr0039 */ + ret = -EFAULT; + goto finish0; + } + if (copy_from_user(&ids[0], query->ids, num * sizeof(EV_ID))) { /* pgr0039 */ + ret = -EFAULT; + goto finish0; + } + if (__put_user(EV_EVENT_None, &(query->ev.type))) { /* pgr0039 */ + ret = -EFAULT; + goto finish0; + } + + ret = 0; + first = 1; + found = -1; + + EVK_mutex_lock(); /*************************************/ + + for(i = 0 ; i < num /* pgr0039 */ ; i++) { + queue = find_queue_entry(ids[i]); + if (queue != NULL) {/* Have the specified queue ID */ + if ((EV_ID_IS_FLAG(ids[i]) + && ((struct flag *)queue)->value != 0) + || (EV_ID_IS_FLAG64(ids[i]) + && ((struct flag64 *)queue)->value != 0) + || (EV_ID_IS_QUEUE(ids[i]) + && ((struct message_queue *)queue)->num > 0)) {/*There are events.*/ + /* Compare with time_before macros for round 0 */ + if (first || time_before((unsigned long)queue->seq_num, /* pgr0006 */ /* pgr0039 */ + (unsigned long)seq_oldest)) { + first = 0; + seq_oldest = queue->seq_num; + found = i; + } + } + } + } + + if (found >= 0) { + if (EV_ID_IS_FLAG(ids[found])) { + if (__put_user(ids[found], &(query->ev.u.flag.flagID))) { /* pgr0039 */ + ret = -EFAULT; + goto finish1; + } + ret = evk_get_flag_event(&(query->ev), peek_only, 0, evk_mem_user); + } else if (EV_ID_IS_FLAG64(ids[found])) { + if (__put_user(ids[found], &(query->ev.u.flag64.flagID))) { /* pgr0039 */ + ret = -EFAULT; + goto finish1; + } + ret = evk_get_flag64_event(&(query->ev), peek_only, 0, evk_mem_user); + } else if (EV_ID_IS_QUEUE(ids[found])) { + if (__put_user(ids[found], &(query->ev.u.message.queueID))) { /* pgr0039 */ + ret = -EFAULT; + goto finish1; + } + ret = evk_get_message_event(&(query->ev), peek_only, 0, evk_mem_user); + } + } + + finish1: + EVK_mutex_unlock(); /*************************************/ + finish0: + kfree(ids); + return ret; +} + +static long +evk_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + EVK_Message_Queue_Request mesq; + int peek_only, wait; + EV_ID queueID; + int ret = -EINVAL; + + //lock_kernel(); + + switch(cmd) { + case EVK_IOC_CREATE_FLAG: + queueID = (EV_ID)arg; + ret = evk_create_flag(queueID); + break; + + case EVK_IOC_CREATE_FLAG64: + queueID = (EV_ID)arg; + ret = evk_create_flag64(queueID); + break; + + case EVK_IOC_CREATE_MESSAGE_QUEUE: + if (access_ok(VERIFY_READ, arg, sizeof(mesq))) { /* pgr0039 */ + if (copy_from_user(&mesq, (EV_Flag *)arg, sizeof(mesq))) { + ret = -EFAULT; + break; + } + + ret = evk_create_message_queue(mesq.queueID, mesq.length, + mesq.max_bytes, mesq.type); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_ALLOC_FLAG_ID: + if (access_ok(VERIFY_WRITE, arg, sizeof(queueID))) { /* pgr0039 */ + evk_alloc_flagID(&queueID); + if (put_user(queueID, (EV_ID *)arg)) { /* pgr0039 */ + ret = -EFAULT; + break; + } + ret = 0; + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_ALLOC_FLAG64_ID: + if (access_ok(VERIFY_WRITE, arg, sizeof(queueID))) { /* pgr0039 */ + evk_alloc_flag64ID(&queueID); + if (put_user(queueID, (EV_ID *)arg)) { /* pgr0039 */ + ret = -EFAULT; + break; + } + ret = 0; + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_ALLOC_QUEUE_ID: + if (access_ok(VERIFY_WRITE, arg, sizeof(queueID))) { /* pgr0039 */ + evk_alloc_queueID(&queueID); + if (put_user(queueID, (EV_ID *)arg)) { /* pgr0039 */ + ret = -EFAULT; + break; + } + ret = 0; + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_DESTROY_QUEUE: + queueID = (EV_ID)arg; + ret = evk_destroy_queue(queueID); + break; + + case EVK_IOC_STORE_FLAG: + if (access_ok(VERIFY_READ, arg, sizeof(EV_Flag))) { /* pgr0039 */ + ret = evk_store_flag((EV_Flag *)arg, evk_mem_user); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_STORE_FLAG64: + if (access_ok(VERIFY_READ, arg, sizeof(EV_Flag64))) { /* pgr0039 */ + ret = evk_store_flag64((EV_Flag64 *)arg, evk_mem_user); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_STORE_MESSAGE: + if (access_ok(VERIFY_READ, arg, sizeof(EV_Message))) { /* pgr0039 */ + ret = evk_store_message((EV_Message *)arg, evk_mem_user); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_SET_POLL: + queueID = (EV_ID)arg; + ret = evk_set_poll(filp, queueID); + break; + + case EVK_IOC_PEEK_EVENT: + peek_only = 1; + wait = 0; + goto get_event; + break; + + case EVK_IOC_WAIT_EVENT: + peek_only = 0; + wait = 1; + goto get_event; + break; + + case EVK_IOC_GET_EVENT: + peek_only = 0; + wait = 0; + get_event: + if (access_ok(VERIFY_WRITE, arg, sizeof(EV_Event))) { /* pgr0039 */ + ret = evk_get_event((EV_Event *)arg, peek_only, wait, evk_mem_user); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_PEEK_NEXT_EVENT: + peek_only = 1; + goto get_next; + break; + + case EVK_IOC_GET_NEXT_EVENT: + peek_only = 0; + get_next: + if (access_ok(VERIFY_WRITE, arg, sizeof(EVK_Next_Event_Query))) { /* pgr0039 */ + ret = evk_get_next_event((EVK_Next_Event_Query *)arg, peek_only); + } else { + ret = -EFAULT; + } + break; + + case EVK_IOC_DEBUG_LIST: + __list_queues(); + //__list_message(); + ret = 0; + break; + + default: + ret = -EINVAL; + break; + } + + //unlock_kernel(); + return ret; +} + +static unsigned int +evk_poll(struct file *filp, poll_table *wait) +{ + unsigned int ret = 0; + struct common_queue *queue; + + EV_ID queueID = (EV_ID)(filp->private_data); + // Returns errors without stopping at assert if queueID is invalid + // (Troubleshooting for Continuous Printing) + if (!EV_ID_IS_VALID(queueID)) { + printk("evk_poll ERROR: invalid queueID=%x\n", queueID); + return POLLERR|POLLHUP; + } + //EVK_assert(EV_ID_IS_VALID(queueID), "poll: flag/queueID not set"); + + EVK_mutex_lock();/*****************************************/ + + queue = find_queue_entry(queueID); + if (queue == NULL) { + EVK_info1("poll: No such flag/queueID %x\n", queueID); + ret = POLLERR|POLLHUP; + goto finish; + } + + poll_wait(filp, &(queue->wq_head), wait); + + if (EV_ID_IS_FLAG(queueID)) { + if (((struct flag *)queue)->value != 0) { + ret = POLLIN; + } + } else if (EV_ID_IS_FLAG64(queueID)) { + if (((struct flag64 *)queue)->value != 0) { + ret = POLLIN; + } + } else { + if (((struct message_queue *)queue)->num > 0) { + ret = POLLIN; + } + } + + finish: + EVK_mutex_unlock(); /***************************************/ + + return ret; +} + +/** List of system call corresponding function registrations */ +static struct file_operations evk_fops = { + .open = evk_open, + .release = evk_close, + .unlocked_ioctl = evk_ioctl, + .poll = evk_poll, +}; + +#ifdef ENABLE_PROC_FS +static int +evk_procFS_show(struct seq_file *m, int mode) +{ + int i, num; + struct list_head *list, *entries; + struct common_queue *queue; + + seq_printf(m, "[ev library status "); + + switch(mode) { + case evk_enum_flag: + seq_printf(m, "(flag)]\n"); + seq_printf(m, "PID moduleID flagID[hash] value\n"); + break; + case evk_enum_flag64: + seq_printf(m, "(flag64)]\n"); + seq_printf(m, "PID moduleID flagID[hash] value\n"); + break; + case evk_enum_queue: + seq_printf(m, "(queue)]\n"); + seq_printf(m, "PID moduleID queueID[hash] maxbytes remain type\n"); + break; + } + + EVK_mutex_lock(); + + num = evk_get_queue_entry(&entries); + + for (i = 0 ; i < num ; i++) { + list = &(entries[i]); + if (!list_empty(list)) { + list_for_each_entry(queue, list, list) { + if ((mode == evk_enum_flag && (!EV_ID_IS_FLAG(queue->queueID))) + || (mode == evk_enum_flag64 && (!EV_ID_IS_FLAG64(queue->queueID))) + || (mode == evk_enum_queue && (!EV_ID_IS_QUEUE(queue->queueID)))) + { + continue; + } + + seq_printf(m, "%08d ", queue->pid); + seq_printf(m, "%05d(%04x) ", ((queue->queueID & 0x00ffff00) >> 8), ((queue->queueID & 0x00ffff00) >> 8)); + seq_printf(m, "0x%08x[%2d] ", queue->queueID, calc_hash(queue->queueID)); + + switch(mode) { + case evk_enum_flag: + seq_printf(m, "0x%x", EVK_PFLAG(queue)->value); + break; + + case evk_enum_flag64: + seq_printf(m, "0x%llx", EVK_PFLAG64(queue)->value); + break; + + case evk_enum_queue: + seq_printf(m, "%04d %02d ", EVK_PQUEUE(queue)->max_bytes, EVK_PQUEUE(queue)->length); + seq_printf(m, "%02d ", EVK_PQUEUE(queue)->num); + seq_printf(m, "%d ", EVK_PQUEUE(queue)->type); + break; + } + seq_printf(m, "\n"); + } + } + } + + EVK_mutex_unlock(); + return 0; +} + +static int +evk_procFS_flag_show(struct seq_file *m, void *v) +{ + return evk_procFS_show(m, evk_enum_flag); +} + +static int +evk_procFS_flag64_show(struct seq_file *m, void *v) +{ + return evk_procFS_show(m, evk_enum_flag64); +} + +static int +evk_procFS_queue_show(struct seq_file *m, void *v) +{ + return evk_procFS_show(m, evk_enum_queue); +} + +static int +evk_procFS_flag_open(struct inode *inode, struct file *file) +{ + return single_open(file, evk_procFS_flag_show, NULL); +} + +static int +evk_procFS_flag64_open(struct inode *inode, struct file *file) +{ + return single_open(file, evk_procFS_flag64_show, NULL); +} + +static int +evk_procFS_queue_open(struct inode *inode, struct file *file) +{ + return single_open(file, evk_procFS_queue_show, NULL); +} + +static struct file_operations evk_proc_flag_fops = { + .owner = THIS_MODULE, + .open = evk_procFS_flag_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations evk_proc_flag64_fops = { + .owner = THIS_MODULE, + .open = evk_procFS_flag64_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations evk_proc_queue_fops = { + .owner = THIS_MODULE, + .open = evk_procFS_queue_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif /*ENABLE_PROC_FS*/ + +__init int +EVK_init(void) +{ + int err; +#ifdef CONFIG_PROC_FS +#ifdef ENABLE_PROC_FS + struct proc_dir_entry *ret; +#endif /* ENABLE_PROC_FS */ +#endif /* CONFIG_PROC_FS */ + int i; + dev_t dev; + + dev = MKDEV(devmajor, devminor); + err = register_chrdev_region(dev, nrdevs, EVK_NAME); + if (err) { + EVK_info1("register_chrdev_region error %d\n", -err); + return -EBUSY; + } + + cdev_init(&cdev, &evk_fops); + cdev.owner = THIS_MODULE; + cdev.ops = &evk_fops; + + err = cdev_add(&cdev, dev, 1); + if (err) { + EVK_info1("cdev_add error %d\n", -err); + return -EBUSY; + } + + /* Initialization */ + for(i = 0 ; i < EVK_MAX_FLAGS ; i++) { + list_add_tail((struct list_head *)&(_flag_pool[i]), + &flag_pool); + } + for(i = 0 ; i < EVK_MAX_FLAG64S ; i++) { + list_add_tail((struct list_head *)&(_flag64_pool[i]), + &flag64_pool); + } + for(i = 0 ; i < EVK_MAX_MESSAGE_QUEUES ; i++) { + list_add_tail((struct list_head *)&(_message_queue_pool[i]), + &message_queue_pool); + } + for(i = 0 ; i < HASH_KEY ; i++) { + INIT_LIST_HEAD(&(queue_entry[i])); + } + +#ifdef CONFIG_PROC_FS +#ifdef ENABLE_PROC_FS + ret = proc_create("driver/ev_flag", 0, NULL, &evk_proc_flag_fops); + if( ret == NULL ) { + EVK_info1("Unable to initialize /proc entry %d\n", -err); + return -EBUSY; + } + + ret = proc_create("driver/ev_flag64", 0, NULL, &evk_proc_flag64_fops); + if( ret == NULL ) { + EVK_info1("Unable to initialize /proc entry %d\n", -err); + return -EBUSY; + } + + ret = proc_create("driver/ev_queue", 0, NULL, &evk_proc_queue_fops); + if( ret == NULL ) { + EVK_info1("Unable to initialize /proc entry %d\n", -err); + return -EBUSY; + } +#endif /* ENABLE_PROC_FS */ +#endif /* CONFIG_PROC_FS */ + + pClass = class_create(THIS_MODULE, EVK_NAME); + device_create(pClass, NULL, dev, NULL, "agl/"EVK_NAME); + + return 0; +} + +void +//#ifndef CONFIG_COMBINE_MODULES +//__exit +//#endif +EVK_exit(void) +{ + dev_t dev = MKDEV(devmajor, devminor); + device_destroy(pClass, dev); + class_destroy(pClass); + + cdev_del(&cdev); + + unregister_chrdev_region(dev, nrdevs); + + remove_proc_entry( "driver/ev_flag", 0 ); + remove_proc_entry( "driver/ev_flag64", 0 ); + remove_proc_entry( "driver/ev_queue", 0 ); +} + +/** @} */ +/** @addtogroup EV + * @{ */ +static EV_ERR +EVK_create_flag_in(EV_ID flagID) +{ + int ret = evk_create_flag(flagID); + + if (ret == -EEXIST) { + return EV_ERR_Exist; + } else if (ret < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +static EV_ERR +EVK_create_flag64_in(EV_ID flagID) +{ + int ret = evk_create_flag64(flagID); + + if (ret == -EEXIST) { + return EV_ERR_Exist; + } else if (ret < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +/** @see EV_create_flag */ +EV_ERR +EVK_create_flag(EV_ID flagID) +{ + if (!EV_ID_IS_FLAG(flagID) || EV_ID_IS_AUTO_ID(flagID)) { + return EV_ERR_Invalid_ID; + } + return EVK_create_flag_in(flagID); +} + +/** @see EV_create_flag64 */ +EV_ERR +EVK_create_flag64(EV_ID flagID) +{ + if (!EV_ID_IS_FLAG64(flagID) || EV_ID_IS_AUTO_ID(flagID)) { + return EV_ERR_Invalid_ID; + } + return EVK_create_flag64_in(flagID); +} + +static EV_ERR +EVK_create_queue_in(EV_ID queueID, UINT8 length, UINT16 max_bytes, + EV_Message_Queue_Type type) +{ + int ret = evk_create_message_queue(queueID, length, max_bytes, type); + + if (ret == -EEXIST) { + return EV_ERR_Exist; + } else if (ret < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +/** @see EV_create_queue */ +EV_ERR +EVK_create_queue(EV_ID queueID, UINT8 length, UINT16 max_bytes, + EV_Message_Queue_Type type) +{ + if (!EV_ID_IS_QUEUE(queueID) || EV_ID_IS_AUTO_ID(queueID)) { + return EV_ERR_Invalid_ID; + } + return EVK_create_queue_in(queueID, length, max_bytes, type); +} + +/** @see EV_create_flag_auto_id */ +EV_ERR +EVK_create_flag_auto_id(/* OUT */EV_ID *flagID) +{ + EV_ERR err; + EVK_assert(flagID != NULL, "NULL pointer was specified"); + + if (evk_alloc_flagID(flagID) < 0) { + return EV_ERR_Fatal; + } + + err = EVK_create_flag_in(*flagID); + if (err != EV_OK) { + *flagID = EV_NO_ID; + } + return err; +} + +/** @see EV_create_flag64_auto_id */ +EV_ERR +EVK_create_flag64_auto_id(/* OUT */EV_ID *flagID) +{ + EV_ERR err; + EVK_assert(flagID != NULL, "NULL pointer was specified"); + + if (evk_alloc_flag64ID(flagID) < 0) { + return EV_ERR_Fatal; + } + + err = EVK_create_flag64_in(*flagID); + if (err != EV_OK) { + *flagID = EV_NO_ID; + } + return err; +} + +/** @see EV_create_queue_auto_id */ +EV_ERR +EVK_create_queue_auto_id(/* OUT */EV_ID *queueID, UINT8 length, + UINT16 max_bytes, EV_Message_Queue_Type type) +{ + EV_ERR err; + EVK_assert(queueID != NULL, "NULL pointer was specified"); + + if (evk_alloc_queueID(queueID) < 0) { + return EV_ERR_Fatal; + } + + err = EVK_create_queue_in(*queueID, length, max_bytes, type); + if (err != EV_OK) { + *queueID = EV_NO_ID; + } + return err; +} + +/** @see EV_destroy_flag */ +EV_ERR +EVK_destroy_flag(EV_ID flagID) +{ + int err; + err = evk_destroy_queue(flagID); + + if (err == -ENOENT) { + return EV_ERR_Invalid_ID; + } else if (err < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +/** @see EV_destroy_queue */ +EV_ERR +EVK_destroy_queue(EV_ID queueID) +{ + return EVK_destroy_flag(queueID); +} + +/* Sending the event */ +/** @see EV_set_flag */ +EV_ERR +EVK_set_flag(EV_ID flagID, UINT32 bits) +{ + EV_Flag flag; + int ret; + + if (!EV_ID_IS_FLAG(flagID)) { + return EV_ERR_Invalid_ID; + } + flag.flagID = flagID; + flag.bits = bits; + + ret = evk_store_flag(&flag, evk_mem_kernel); + if (ret == -ENOENT) { + return EV_ERR_Invalid_ID; + } else if (ret < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +/** @see EV_set_flag64 */ +EV_ERR +EVK_set_flag64(EV_ID flagID, UINT64 bits) +{ + EV_Flag64 flag; + int ret; + + if (!EV_ID_IS_FLAG64(flagID)) { + return EV_ERR_Invalid_ID; + } + flag.flagID = flagID; + flag.bits = bits; + + ret = evk_store_flag64(&flag, evk_mem_kernel); + if (ret == -ENOENT) { + return EV_ERR_Invalid_ID; + } else if (ret < 0) { + return EV_ERR_Fatal; + } else { + return EV_OK; + } +} + +/** @see EV_send_message */ +EV_ERR +EVK_send_message(EV_ID queueID, UINT16 bytes, const void *message, + UINT32 senderInfo) +{ + EV_Message *msg = NULL; + EV_ERR ev_ret; + int ret; + + msg = evk_malloc( sizeof( EV_Message ) ); + if( msg == NULL ) + { + ev_ret = EV_ERR_Fatal; + goto L_END; + } + + if (!EV_ID_IS_QUEUE(queueID)) { + ev_ret = EV_ERR_Invalid_ID; + goto L_END; + } + EVK_assert(message != NULL, "NULL pointer was specified"); + EVK_assert(bytes <= EV_MAX_MESSAGE_LENGTH, "send_message: message too long"); + + msg->queueID = queueID; + msg->senderInfo = senderInfo; + msg->length = bytes; + memcpy(msg->message, message, bytes); + + ret = evk_store_message(msg, evk_mem_kernel); + if (ret == -ENOENT) { + ev_ret = EV_ERR_Invalid_ID; + } else if (ret == -EBUSY) { + ev_ret = EV_ERR_Busy; + } else if (ret < 0) { + ev_ret = EV_ERR_Fatal; + } else { + ev_ret = EV_OK; + } + +L_END: + if( msg != NULL ) + { + evk_free( msg ); + } + return ev_ret; +} + +/* Event acquisition(Order of arrival time) */ +//EV_ERR EV_get_next_event(/* OUT */EV_Event *ev); + +static EV_ERR +EVK_get_flag_in(EV_ID flagID, EV_Flag *flag, int peek_only, int wait) +{ + EV_Event *ev = NULL; + EV_ERR ev_ret; + int ret; + + ev = evk_malloc( sizeof( EV_Event ) ); + if( ev == NULL ) + { + ev_ret = EV_ERR_Fatal; + goto L_END; + } + + EVK_assert(flag != NULL, "get_flag: NULL pointer was specified"); + flag->flagID = EV_NO_ID; + flag->bits = 0; + + if (!EV_ID_IS_FLAG(flagID)) { + ev_ret = EV_ERR_Invalid_ID; + goto L_END; + } + + ev->type = EV_EVENT_Flag; + ev->u.flag.flagID = flagID; + ev->u.flag.bits = 0; + + ret = evk_get_event(ev, peek_only, wait, evk_mem_kernel); + + if (ret < 0) { + if (ret == -ENOENT) { + ev_ret = EV_ERR_Invalid_ID; + } else if (ret == -EINTR) { + ev_ret = EV_ERR_Interrupted; + } else { + ev_ret = EV_ERR_Fatal; + } + goto L_END; + } + + if (ev->type == EV_EVENT_Flag) { + flag->flagID = ev->u.flag.flagID; + flag->bits = ev->u.flag.bits; + } + ev_ret = EV_OK; + +L_END: + if( ev != NULL ) + { + evk_free( ev ); + } + return ev_ret; +} + +static EV_ERR +EVK_get_flag64_in(EV_ID flagID, EV_Flag64 *flag, int peek_only, int wait) +{ + EV_Event *ev = NULL; + EV_ERR ev_ret; + int ret; + + ev = evk_malloc( sizeof( EV_Event ) ); + if( ev == NULL ) + { + ev_ret = EV_ERR_Fatal; + goto L_END; + } + + EVK_assert(flag != NULL, "get_flag64: NULL pointer was specified"); + flag->flagID = EV_NO_ID; + flag->bits = 0; + + if (!EV_ID_IS_FLAG64(flagID)) { + ev_ret = EV_ERR_Invalid_ID; + goto L_END; + } + + ev->type = EV_EVENT_Flag64; + ev->u.flag64.flagID = flagID; + ev->u.flag64.bits = 0; + + ret = evk_get_event(ev, peek_only, wait, evk_mem_kernel); + + if (ret < 0) { + if (ret == -ENOENT) { + ev_ret = EV_ERR_Invalid_ID; + } else if (ret == -EINTR) { + ev_ret = EV_ERR_Interrupted; + } else { + ev_ret = EV_ERR_Fatal; + } + goto L_END; + } + + if (ev->type == EV_EVENT_Flag64) { + flag->flagID = ev->u.flag64.flagID; + flag->bits = ev->u.flag64.bits; + } + ev_ret = EV_OK; + +L_END: + if( ev != NULL ) + { + evk_free( ev ); + } + return ev_ret; +} + +/* Event acquisition(With Search Criteria) */ +/** @see EV_get_flag */ +EV_ERR +EVK_get_flag(EV_ID flagID, /* OUT */EV_Flag *flag) +{ + return EVK_get_flag_in(flagID, flag, 0, 0); +} + +/** @see EV_get_flag64 */ +EV_ERR +EVK_get_flag64(EV_ID flagID, /* OUT */EV_Flag64 *flag) +{ + return EVK_get_flag64_in(flagID, flag, 0, 0); +} + +/** @see EV_wait_flag */ +EV_ERR +EVK_wait_flag(EV_ID flagID, /* OUT */EV_Flag *flag)/* block */ +{ + return EVK_get_flag_in(flagID, flag, 0, 1); +} + +/** @see EV_wait_flag64 */ +EV_ERR +EVK_wait_flag64(EV_ID flagID, /* OUT */EV_Flag64 *flag)/* block */ +{ + return EVK_get_flag64_in(flagID, flag, 0, 1); +} + +/** @see EV_peek_flag */ +EV_ERR +EVK_peek_flag(EV_ID flagID, /* OUT */EV_Flag *flag) +{ + return EVK_get_flag_in(flagID, flag, 1, 0); +} + +/** @see EV_peek_flag64 */ +EV_ERR +EVK_peek_flag64(EV_ID flagID, /* OUT */EV_Flag64 *flag) +{ + return EVK_get_flag64_in(flagID, flag, 1, 0); +} + +static EV_ERR +EVK_get_message_in(EV_ID queueID, EV_Message *message, UINT32 senderInfo, + UINT32 length, const void *compare_bytes, + int peek_only, int wait) +{ + EV_Event *ev = NULL; + EV_ERR ev_ret; + int ret; + + ev = evk_malloc( sizeof( EV_Event ) ); + if( ev == NULL ) + { + ev_ret = EV_ERR_Fatal; + goto L_END; + } + + EVK_assert(message != NULL, "get_message: NULL pointer was specified"); + if (!EV_ID_IS_QUEUE(queueID)) { + ev_ret = EV_ERR_Invalid_ID; + goto L_END; + } + message->queueID = EV_NO_ID; + message->senderInfo = 0; + message->length = 0; + + ev->type = EV_EVENT_Message; + ev->u.message.queueID = queueID; + ev->u.message.senderInfo = senderInfo; + if (compare_bytes != NULL) { + ev->u.message.length = length; + memcpy(ev->u.message.message, compare_bytes, length); + } else { + ev->u.message.length = 0; + } + + ret = evk_get_event(ev, peek_only, wait, evk_mem_kernel); + + if (ret < 0) { + if (ret == -ENOENT) { + ev_ret = EV_ERR_Invalid_ID; + } else if (ret == -EINTR) { + ev_ret = EV_ERR_Interrupted; + } else { + ev_ret = EV_ERR_Fatal; + } + goto L_END; + } + + if (ev->type == EV_EVENT_Message) { + message->queueID = ev->u.message.queueID; + message->senderInfo = ev->u.message.senderInfo; + message->length = ev->u.message.length; + memcpy(message->message, ev->u.message.message, ev->u.message.length); + } + ev_ret = EV_OK; + +L_END: + if( ev != NULL ) + { + evk_free( ev ); + } + return ev_ret; +} + +/** @see EV_get_message */ +EV_ERR +EVK_get_message(EV_ID queueID, /* OUT */EV_Message *message) +{ + return EVK_get_message_in(queueID, message, 0, 0, NULL, 0, 0); +} + +/** @see EV_wait_message */ +EV_ERR +EVK_wait_message(EV_ID queueID, /* OUT */EV_Message *message)/* block */ +{ + return EVK_get_message_in(queueID, message, 0, 0, NULL, 0, 1); +} + +/** @see EV_peek_message */ +EV_ERR +EVK_peek_message(EV_ID queueID, /* OUT */EV_Message *message) +{ + return EVK_get_message_in(queueID, message, 0, 0, NULL, 1, 0); +} + +/** @see EV_find_message_by_sender */ +EV_ERR +EVK_find_message_by_sender(EV_ID queueID, UINT32 senderInfo, + /* OUT */EV_Message *message) +{ + // Not mounted + return EV_ERR_Fatal; +} + +/** @see EV_find_message_by_content */ +EV_ERR +EVK_find_message_by_content(EV_ID queueID, UINT16 length, + const void *compare_bytes, + /* OUT */EV_Message *message) +{ + // Not mounted + return EV_ERR_Fatal; +} +/** @} */ + +EXPORT_SYMBOL(evk_get_queue_entry); +EXPORT_SYMBOL(EVK_init); +EXPORT_SYMBOL(EVK_exit); + +EXPORT_SYMBOL(EVK_create_flag); +EXPORT_SYMBOL(EVK_create_flag64); +EXPORT_SYMBOL(EVK_create_queue); +EXPORT_SYMBOL(EVK_create_flag_auto_id); +EXPORT_SYMBOL(EVK_create_flag64_auto_id); +EXPORT_SYMBOL(EVK_create_queue_auto_id); +EXPORT_SYMBOL(EVK_destroy_flag); +EXPORT_SYMBOL(EVK_destroy_queue); +EXPORT_SYMBOL(EVK_set_flag); +EXPORT_SYMBOL(EVK_set_flag64); +EXPORT_SYMBOL(EVK_send_message); +EXPORT_SYMBOL(EVK_get_flag); +EXPORT_SYMBOL(EVK_wait_flag); +EXPORT_SYMBOL(EVK_peek_flag); +EXPORT_SYMBOL(EVK_get_flag64); +EXPORT_SYMBOL(EVK_wait_flag64); +EXPORT_SYMBOL(EVK_peek_flag64); +EXPORT_SYMBOL(EVK_get_message); +EXPORT_SYMBOL(EVK_wait_message); +EXPORT_SYMBOL(EVK_peek_message); + +#ifndef CONFIG_COMBINE_MODULES +//MODULE_LICENSE("proprietary"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("EVent library for Kernel"); +//MODULE_SUPPORTED_DEVICE(name); +//MODULE_PARM(var,type) +//MODULE_PARM_DESC(var,desc) +module_init(EVK_init); +module_exit(EVK_exit); +#endif /* !CONFIG_COMBINE_MODULES */ |