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/*
* Copyright (C) 2011 Samsung Electronics.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include "headers.h"
u32 control_init(struct net_adapter *adapter)
{
INIT_LIST_HEAD(&adapter->ctl.q_received_ctrl);
spin_lock_init(&adapter->ctl.lock);
INIT_LIST_HEAD(&adapter->ctl.apps.process_list);
spin_lock_init(&adapter->ctl.apps.lock);
adapter->ctl.apps.ready = true;
return STATUS_SUCCESS;
}
void control_remove(struct net_adapter *adapter)
{
struct list_head *pos, *nxt;
struct buffer_descriptor *bufdsc;
struct process_descriptor *procdsc;
/* Free the received control packets queue */
list_for_each_safe(pos, nxt, &adapter->ctl.q_received_ctrl) {
bufdsc = list_entry(pos, struct buffer_descriptor, list);
list_del(pos);
kfree(bufdsc->buffer);
kfree(bufdsc);
}
if (!adapter->ctl.apps.ready)
return;
list_for_each_safe(pos, nxt, &adapter->ctl.apps.process_list) {
procdsc = list_entry(pos,
struct process_descriptor, list);
if (procdsc->irp) {
procdsc->irp = false;
wake_up_interruptible
(&procdsc->read_wait);
}
}
/* delay for the process release */
msleep(100);
adapter->ctl.apps.ready = false;
}
/* add received packet to pending list */
static void control_enqueue_buffer(struct net_adapter *adapter,
void *buffer, u32 length)
{
struct buffer_descriptor *bufdsc;
struct process_descriptor *procdsc;
struct eth_header hdr;
/* get the packet type for the process check */
memcpy(&hdr.type, (unsigned short *)buffer, sizeof(unsigned short));
/* Queue and wake read only if process exist. */
procdsc = process_by_type(adapter, hdr.type);
if (!procdsc) {
pr_debug("Waiting process not found skip the packet");
return;
}
bufdsc = (struct buffer_descriptor *)
kmalloc(sizeof(*bufdsc), GFP_KERNEL);
if (bufdsc == NULL) {
pr_debug("bufdsc Memory Alloc Failure *****");
return;
}
bufdsc->buffer = kmalloc(
(length + (ETHERNET_ADDRESS_LENGTH * 2)), GFP_KERNEL);
if (bufdsc->buffer == NULL) {
kfree(bufdsc);
pr_debug("bufdsc->buffer Memory Alloc Failure *****");
return;
}
/* add ethernet header to control packet */
memcpy(bufdsc->buffer, adapter->hw.eth_header,
(ETHERNET_ADDRESS_LENGTH * 2));
memcpy(bufdsc->buffer + (ETHERNET_ADDRESS_LENGTH * 2),
buffer, length);
/* fill out descriptor */
bufdsc->length = length + (ETHERNET_ADDRESS_LENGTH * 2);
bufdsc->type = hdr.type;
/* add to pending list */
list_add_tail(&bufdsc->list, &adapter->ctl.q_received_ctrl);
if (procdsc->irp) {
procdsc->irp = false;
wake_up_interruptible(&procdsc->read_wait);
}
}
/* receive control data */
void control_recv(struct net_adapter *adapter, void *buffer, u32 length)
{
/* check halt flag */
if (adapter->halted)
return;
/* not found, add to pending buffers list */
spin_lock(&adapter->ctl.lock);
control_enqueue_buffer(adapter, buffer, length);
spin_unlock(&adapter->ctl.lock);
}
u32 control_send(struct net_adapter *adapter, void *buffer, u32 length)
{
struct buffer_descriptor *bufdsc;
struct hw_packet_header *hdr;
u8 *ptr;
adapter->pdata->wakeup_assert(1);
if ((length + sizeof(struct hw_packet_header)) >= WIMAX_MAX_TOTAL_SIZE)
return STATUS_RESOURCES;/* changed from SUCCESS return status */
bufdsc = (struct buffer_descriptor *)
kmalloc(sizeof(*bufdsc), GFP_ATOMIC);
if (bufdsc == NULL)
return STATUS_RESOURCES;
bufdsc->buffer = kmalloc(BUFFER_DATA_SIZE, GFP_ATOMIC);
if (bufdsc->buffer == NULL) {
kfree(bufdsc);
return STATUS_RESOURCES;
}
ptr = bufdsc->buffer;
hdr = (struct hw_packet_header *)bufdsc->buffer;
ptr += sizeof(struct hw_packet_header);
ptr += 2;
memcpy(ptr, buffer + (ETHERNET_ADDRESS_LENGTH * 2),
length - (ETHERNET_ADDRESS_LENGTH * 2));
/* add packet header */
hdr->id0 = 'W';
hdr->id1 = 'C';
hdr->length = (u16)length - (ETHERNET_ADDRESS_LENGTH * 2);
/* set length */
bufdsc->length = (u16)length - (ETHERNET_ADDRESS_LENGTH * 2)
+ sizeof(struct hw_packet_header);
bufdsc->length += 2;
spin_lock(&adapter->hw.lock);
list_add_tail(&bufdsc->list, &adapter->hw.q_send);
spin_unlock(&adapter->hw.lock);
wake_up_interruptible(&adapter->send_event);
return STATUS_SUCCESS;
}
struct process_descriptor *process_by_id(struct net_adapter *adapter, u32 id)
{
struct process_descriptor *procdsc;
list_for_each_entry(procdsc, &adapter->ctl.apps.process_list, list) {
if (procdsc->id == id) /* process found */
return procdsc;
}
return NULL;
}
struct process_descriptor
*process_by_type(struct net_adapter *adapter, u16 type)
{
struct process_descriptor *procdsc;
list_for_each_entry(procdsc, &adapter->ctl.apps.process_list, list) {
if (procdsc->type == type) /* process found */
return procdsc;
}
return NULL;
}
/* find buffer by buffer type */
struct buffer_descriptor
*buffer_by_type(struct net_adapter *adapter, u16 type)
{
struct buffer_descriptor *bufdsc;
list_for_each_entry(bufdsc, &adapter->ctl.q_received_ctrl, list) {
if (bufdsc->type == type) /* process found */ {
return bufdsc;
}
}
return NULL;
}
void remove_process(struct net_adapter *adapter, u32 id)
{
struct process_descriptor *procdsc;
struct list_head *pos, *nxt;
list_for_each_safe(pos, nxt, &adapter->ctl.apps.process_list) {
procdsc = list_entry(pos, struct process_descriptor, list);
if (procdsc->id == id) {
list_del(pos);
kfree(procdsc);
}
}
}
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