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/*
* Copyright 2010 Ettus Research LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 "pkt_ctrl.h"
#include "memory_map.h"
#include <nonstdio.h>
void pkt_ctrl_program_inspector(
const struct ip_addr *ip_addr, uint16_t ctrl_port, uint16_t data_port
){
buffer_pool_ctrl->ip_addr = ip_addr->addr;
buffer_pool_ctrl->ctrl_ports = ctrl_port;
buffer_pool_ctrl->data_ports = data_port;
}
void pkt_ctrl_set_routing_mode(pkt_ctrl_routing_mode_t mode){
switch(mode){
case PKT_CTRL_ROUTING_MODE_SLAVE:
buffer_pool_ctrl->misc_ctrl = 0;
break;
case PKT_CTRL_ROUTING_MODE_MASTER:
buffer_pool_ctrl->misc_ctrl = 1;
break;
}
}
static inline bool is_status_bit_set(int bit){
return buffer_pool_status->status & (1 << bit);
}
#define CPU_OUT_HS_BIT 0 //from packet router to CPU
#define CPU_INP_HS_BIT 1 //from CPU to packet router
void *pkt_ctrl_claim_incoming_buffer(size_t *num_lines){
buffer_pool_ctrl->cpu_out_ctrl = 0;
if (!is_status_bit_set(CPU_OUT_HS_BIT)) return NULL;
*num_lines = (buffer_pool_status->status >> 16) & 0xffff;
return buffer_ram(0);
}
void pkt_ctrl_release_incoming_buffer(void){
buffer_pool_ctrl->cpu_out_ctrl = 1;
while (is_status_bit_set(CPU_OUT_HS_BIT)){}
buffer_pool_ctrl->cpu_out_ctrl = 0;
}
void *pkt_ctrl_claim_outgoing_buffer(void){
buffer_pool_ctrl->cpu_inp_ctrl = 0;
while (!is_status_bit_set(CPU_INP_HS_BIT)){}
return buffer_ram(1);
}
void pkt_ctrl_commit_outgoing_buffer(size_t num_lines){
buffer_pool_ctrl->cpu_inp_ctrl = ((num_lines & 0xffff) << 16) | 1;
while (is_status_bit_set(CPU_INP_HS_BIT)){}
buffer_pool_ctrl->cpu_inp_ctrl = 0;
}
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